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77cffa9ed9
gecko/layout/base/nsPresShell.cpp
L. David Baron 77cffa9ed9 Set inflation container and width correctly during reflow. (Bug 706609, patch 3) r=roc 
This is the second of three patches to rework the way we handle getting
the font inflation container and width data during reflow, which are
needed so that we can sometimes honor inflation during intrinsic width
calculation (which we need to do to make some form controls inflate
correctly).
2012-01-24 17:21:28 -08:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=2 sw=2 et tw=78:
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Clark <buster@netscape.com>
* Håkan Waara <hwaara@chello.se>
* Dan Rosen <dr@netscape.com>
* Daniel Glazman <glazman@netscape.com>
* Mats Palmgren <matspal@gmail.com>
* Mihai Sucan <mihai.sucan@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 05/03/2000 IBM Corp. Observer events for reflow states
*/
/* a presentation of a document, part 2 */
#include "mozilla/dom/PBrowserChild.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/Util.h"
#ifdef XP_WIN
#include "winuser.h"
#endif
#include "nsPresShell.h"
#include "nsPresContext.h"
#include "nsIContent.h"
#include "mozilla/dom/Element.h"
#include "nsIDocument.h"
#include "nsIDOMXULDocument.h"
#include "nsCSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please?
#include "nsIDOMCSSStyleSheet.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsAnimationManager.h"
#include "nsINameSpaceManager.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsIServiceManager.h"
#include "nsFrame.h"
#include "nsViewManager.h"
#include "nsView.h"
#include "nsCRTGlue.h"
#include "prlog.h"
#include "prmem.h"
#include "prprf.h"
#include "prinrval.h"
#include "nsTArray.h"
#include "nsCOMArray.h"
#include "nsHashtable.h"
#include "nsContainerFrame.h"
#include "nsDOMEvent.h"
#include "nsHTMLParts.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsLayoutCID.h"
#include "nsGkAtoms.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMElement.h"
#include "nsRange.h"
#include "nsCSSPseudoElements.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsIPageSequenceFrame.h"
#include "nsCaret.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMXMLDocument.h"
#include "nsIParser.h"
#include "nsParserCIID.h"
#include "nsViewsCID.h"
#include "nsFrameManager.h"
#include "nsEventStateManager.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsILayoutHistoryState.h"
#include "nsILineIterator.h" // for ScrollContentIntoView
#include "nsWeakPtr.h"
#include "pldhash.h"
#include "nsDOMTouchEvent.h"
#include "nsIObserverService.h"
#include "nsIDocShell.h" // for reflow observation
#include "nsIBaseWindow.h"
#include "nsLayoutErrors.h"
#include "nsLayoutUtils.h"
#include "nsCSSRendering.h"
// for |#ifdef DEBUG| code
#include "prenv.h"
#include "nsAlgorithm.h"
#include "nsIAttribute.h"
#include "nsIGlobalHistory2.h"
#include "nsDisplayList.h"
#include "nsRegion.h"
#include "nsRenderingContext.h"
#include "nsAutoLayoutPhase.h"
#ifdef MOZ_REFLOW_PERF
#include "nsFontMetrics.h"
#endif
#include "nsIReflowCallback.h"
#include "nsPIDOMWindow.h"
#include "nsFocusManager.h"
#include "nsNPAPIPluginInstance.h"
#include "nsIObjectFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsNetUtil.h"
#include "nsEventDispatcher.h"
#include "nsThreadUtils.h"
#include "nsStyleSheetService.h"
#include "gfxImageSurface.h"
#include "gfxContext.h"
#ifdef MOZ_MEDIA
#include "nsHTMLMediaElement.h"
#endif
#include "nsSMILAnimationController.h"
#include "nsRefreshDriver.h"
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsIClipboardHelper.h"
#include "nsIDocShellTreeItem.h"
#include "nsIURI.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
#include "nsIDragService.h"
#include "nsCopySupport.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsITimer.h"
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
// For style data reconstruction
#include "nsStyleChangeList.h"
#include "nsCSSFrameConstructor.h"
#ifdef MOZ_XUL
#include "nsMenuFrame.h"
#include "nsTreeBodyFrame.h"
#include "nsIBoxObject.h"
#include "nsITreeBoxObject.h"
#include "nsMenuPopupFrame.h"
#include "nsITreeColumns.h"
#include "nsIDOMXULMultSelectCntrlEl.h"
#include "nsIDOMXULSelectCntrlItemEl.h"
#include "nsIDOMXULMenuListElement.h"
#endif
#include "nsPlaceholderFrame.h"
#include "nsCanvasFrame.h"
// Content viewer interfaces
#include "nsIContentViewer.h"
#include "imgIEncoder.h"
#include "gfxPlatform.h"
/* for NS_MEMORY_REPORTER_IMPLEMENT */
#include "nsIMemoryReporter.h"
#include "mozilla/FunctionTimer.h"
#include "mozilla/Preferences.h"
#include "mozilla/Telemetry.h"
#include "sampler.h"
#include "Layers.h"
#include "nsAsyncDOMEvent.h"
#ifdef NS_FUNCTION_TIMER
#define NS_TIME_FUNCTION_DECLARE_DOCURL \
nsCAutoString docURL__("N/A"); \
nsIURI *uri__ = mDocument->GetDocumentURI(); \
if (uri__) uri__->GetSpec(docURL__);
#define NS_TIME_FUNCTION_WITH_DOCURL \
NS_TIME_FUNCTION_DECLARE_DOCURL \
NS_TIME_FUNCTION_MIN_FMT(1.0, \
"%s (line %d) (document: %s)", MOZ_FUNCTION_NAME, \
__LINE__, docURL__.get())
#else
#define NS_TIME_FUNCTION_WITH_DOCURL do{} while(0)
#endif
#define ANCHOR_SCROLL_FLAGS (SCROLL_OVERFLOW_HIDDEN | SCROLL_NO_PARENT_FRAMES)
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::layers;
CapturingContentInfo nsIPresShell::gCaptureInfo =
{ false /* mAllowed */, false /* mRetargetToElement */,
false /* mPreventDrag */, nsnull /* mContent */ };
nsIContent* nsIPresShell::gKeyDownTarget;
nsInterfaceHashtable<nsUint32HashKey, nsIDOMTouch> nsIPresShell::gCaptureTouchList;
bool nsIPresShell::gPreventMouseEvents = false;
static PRUint32
ChangeFlag(PRUint32 aFlags, bool aOnOff, PRUint32 aFlag)
{
PRUint32 flags;
if (aOnOff) {
flags = (aFlags | aFlag);
} else {
flags = (aFlag & ~aFlag);
}
return flags;
}
// convert a color value to a string, in the CSS format #RRGGBB
// * - initially created for bugs 31816, 20760, 22963
static void ColorToString(nscolor aColor, nsAutoString &aString);
// RangePaintInfo is used to paint ranges to offscreen buffers
struct RangePaintInfo {
nsRefPtr<nsRange> mRange;
nsDisplayListBuilder mBuilder;
nsDisplayList mList;
// offset of builder's reference frame to the root frame
nsPoint mRootOffset;
RangePaintInfo(nsRange* aRange, nsIFrame* aFrame)
: mRange(aRange), mBuilder(aFrame, nsDisplayListBuilder::PAINTING, false)
{
MOZ_COUNT_CTOR(RangePaintInfo);
}
~RangePaintInfo()
{
mList.DeleteAll();
MOZ_COUNT_DTOR(RangePaintInfo);
}
};
#undef NOISY
// ----------------------------------------------------------------------
#ifdef NS_DEBUG
// Set the environment variable GECKO_VERIFY_REFLOW_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static PRUint32 gVerifyReflowFlags;
struct VerifyReflowFlags {
const char* name;
PRUint32 bit;
};
static const VerifyReflowFlags gFlags[] = {
{ "verify", VERIFY_REFLOW_ON },
{ "reflow", VERIFY_REFLOW_NOISY },
{ "all", VERIFY_REFLOW_ALL },
{ "list-commands", VERIFY_REFLOW_DUMP_COMMANDS },
{ "noisy-commands", VERIFY_REFLOW_NOISY_RC },
{ "really-noisy-commands", VERIFY_REFLOW_REALLY_NOISY_RC },
{ "resize", VERIFY_REFLOW_DURING_RESIZE_REFLOW },
};
#define NUM_VERIFY_REFLOW_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowVerifyReflowFlags()
{
printf("Here are the available GECKO_VERIFY_REFLOW_FLAGS:\n");
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
printf(" %s\n", flag->name);
++flag;
}
printf("Note: GECKO_VERIFY_REFLOW_FLAGS is a comma separated list of flag\n");
printf("names (no whitespace)\n");
}
#endif
//========================================================================
//========================================================================
//========================================================================
#ifdef MOZ_REFLOW_PERF
class ReflowCountMgr;
static const char kGrandTotalsStr[] = "Grand Totals";
// Counting Class
class ReflowCounter {
public:
ReflowCounter(ReflowCountMgr * aMgr = nsnull);
~ReflowCounter();
void ClearTotals();
void DisplayTotals(const char * aStr);
void DisplayDiffTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void Add() { mTotal++; }
void Add(PRUint32 aTotal) { mTotal += aTotal; }
void CalcDiffInTotals();
void SetTotalsCache();
void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; }
PRUint32 GetTotal() { return mTotal; }
protected:
void DisplayTotals(PRUint32 aTotal, const char * aTitle);
void DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle);
PRUint32 mTotal;
PRUint32 mCacheTotal;
ReflowCountMgr * mMgr; // weak reference (don't delete)
};
// Counting Class
class IndiReflowCounter {
public:
IndiReflowCounter(ReflowCountMgr * aMgr = nsnull)
: mFrame(nsnull),
mCount(0),
mMgr(aMgr),
mCounter(aMgr),
mHasBeenOutput(false)
{}
virtual ~IndiReflowCounter() {}
nsAutoString mName;
nsIFrame * mFrame; // weak reference (don't delete)
PRInt32 mCount;
ReflowCountMgr * mMgr; // weak reference (don't delete)
ReflowCounter mCounter;
bool mHasBeenOutput;
};
//--------------------
// Manager Class
//--------------------
class ReflowCountMgr {
public:
ReflowCountMgr();
virtual ~ReflowCountMgr();
void ClearTotals();
void ClearGrandTotals();
void DisplayTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void DisplayDiffsInTotals(const char * aStr);
void Add(const char * aName, nsIFrame * aFrame);
ReflowCounter * LookUp(const char * aName);
void PaintCount(const char *aName, nsRenderingContext* aRenderingContext,
nsPresContext *aPresContext, nsIFrame *aFrame,
const nsPoint &aOffset, PRUint32 aColor);
FILE * GetOutFile() { return mFD; }
PLHashTable * GetIndiFrameHT() { return mIndiFrameCounts; }
void SetPresContext(nsPresContext * aPresContext) { mPresContext = aPresContext; } // weak reference
void SetPresShell(nsIPresShell* aPresShell) { mPresShell= aPresShell; } // weak reference
void SetDumpFrameCounts(bool aVal) { mDumpFrameCounts = aVal; }
void SetDumpFrameByFrameCounts(bool aVal) { mDumpFrameByFrameCounts = aVal; }
void SetPaintFrameCounts(bool aVal) { mPaintFrameByFrameCounts = aVal; }
bool IsPaintingFrameCounts() { return mPaintFrameByFrameCounts; }
protected:
void DisplayTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle);
void DisplayHTMLTotals(PRUint32 aTotal, PRUint32 * aDupArray, char * aTitle);
static PRIntn RemoveItems(PLHashEntry *he, PRIntn i, void *arg);
static PRIntn RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg);
void CleanUp();
// stdout Output Methods
static PRIntn DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg);
static PRIntn DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandTotals();
void DoIndiTotalsTree();
// HTML Output Methods
static PRIntn DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandHTMLTotals();
// Zero Out the Totals
static PRIntn DoClearTotals(PLHashEntry *he, PRIntn i, void *arg);
// Displays the Diff Totals
static PRIntn DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg);
PLHashTable * mCounts;
PLHashTable * mIndiFrameCounts;
FILE * mFD;
bool mDumpFrameCounts;
bool mDumpFrameByFrameCounts;
bool mPaintFrameByFrameCounts;
bool mCycledOnce;
// Root Frame for Individual Tracking
nsPresContext * mPresContext;
nsIPresShell* mPresShell;
// ReflowCountMgr gReflowCountMgr;
};
#endif
//========================================================================
// comment out to hide caret
#define SHOW_CARET
// The upper bound on the amount of time to spend reflowing, in
// microseconds. When this bound is exceeded and reflow commands are
// still queued up, a reflow event is posted. The idea is for reflow
// to not hog the processor beyond the time specifed in
// gMaxRCProcessingTime. This data member is initialized from the
// layout.reflow.timeslice pref.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
StackArena::StackArena()
{
mMarkLength = 0;
mMarks = nsnull;
// allocate our stack memory
mBlocks = new StackBlock();
mCurBlock = mBlocks;
mStackTop = 0;
mPos = 0;
}
StackArena::~StackArena()
{
// free up our data
delete[] mMarks;
while(mBlocks)
{
StackBlock* toDelete = mBlocks;
mBlocks = mBlocks->mNext;
delete toDelete;
}
}
void
StackArena::Push()
{
// Resize the mark array if we overrun it. Failure to allocate the
// mark array is not fatal; we just won't free to that mark. This
// allows callers not to worry about error checking.
if (mStackTop >= mMarkLength)
{
PRUint32 newLength = mStackTop + STACK_ARENA_MARK_INCREMENT;
StackMark* newMarks = new StackMark[newLength];
if (newMarks) {
if (mMarkLength)
memcpy(newMarks, mMarks, sizeof(StackMark)*mMarkLength);
// Fill in any marks that we couldn't allocate during a prior call
// to Push().
for (; mMarkLength < mStackTop; ++mMarkLength) {
NS_NOTREACHED("should only hit this on out-of-memory");
newMarks[mMarkLength].mBlock = mCurBlock;
newMarks[mMarkLength].mPos = mPos;
}
delete [] mMarks;
mMarks = newMarks;
mMarkLength = newLength;
}
}
// set a mark at the top (if we can)
NS_ASSERTION(mStackTop < mMarkLength, "out of memory");
if (mStackTop < mMarkLength) {
mMarks[mStackTop].mBlock = mCurBlock;
mMarks[mStackTop].mPos = mPos;
}
mStackTop++;
}
void*
StackArena::Allocate(size_t aSize)
{
NS_ASSERTION(mStackTop > 0, "Allocate called without Push");
// make sure we are aligned. Beard said 8 was safer then 4.
// Round size to multiple of 8
aSize = NS_ROUNDUP<size_t>(aSize, 8);
// if the size makes the stack overflow. Grab another block for the stack
if (mPos + aSize >= STACK_ARENA_BLOCK_INCREMENT)
{
NS_ASSERTION(aSize <= STACK_ARENA_BLOCK_INCREMENT,
"Requested memory is greater that our block size!!");
if (mCurBlock->mNext == nsnull)
mCurBlock->mNext = new StackBlock();
mCurBlock = mCurBlock->mNext;
mPos = 0;
}
// return the chunk they need.
void *result = mCurBlock->mBlock + mPos;
mPos += aSize;
return result;
}
void
StackArena::Pop()
{
// pop off the mark
NS_ASSERTION(mStackTop > 0, "unmatched pop");
mStackTop--;
if (mStackTop >= mMarkLength) {
// We couldn't allocate the marks array at the time of the push, so
// we don't know where we're freeing to.
NS_NOTREACHED("out of memory");
if (mStackTop == 0) {
// But we do know if we've completely pushed the stack.
mCurBlock = mBlocks;
mPos = 0;
}
return;
}
#ifdef DEBUG
// Mark the "freed" memory with 0xdd to help with debugging of memory
// allocation problems.
{
StackBlock *block = mMarks[mStackTop].mBlock, *block_end = mCurBlock;
size_t pos = mMarks[mStackTop].mPos;
for (; block != block_end; block = block->mNext, pos = 0) {
memset(block->mBlock + pos, 0xdd, sizeof(block->mBlock) - pos);
}
memset(block->mBlock + pos, 0xdd, mPos - pos);
}
#endif
mCurBlock = mMarks[mStackTop].mBlock;
mPos = mMarks[mStackTop].mPos;
}
struct nsCallbackEventRequest
{
nsIReflowCallback* callback;
nsCallbackEventRequest* next;
};
// ----------------------------------------------------------------------------
#define ASSERT_REFLOW_SCHEDULED_STATE() \
NS_ASSERTION(mReflowScheduled == \
GetPresContext()->RefreshDriver()-> \
IsLayoutFlushObserver(this), "Unexpected state")
NS_IMPL_ISUPPORTS1(PresShell::MemoryReporter, nsIMemoryMultiReporter)
namespace {
struct MemoryReporterData
{
nsIMemoryMultiReporterCallback* callback;
nsISupports* closure;
};
} // anonymous namespace
NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(LayoutMallocSizeOf, "layout")
/* static */ PLDHashOperator
PresShell::MemoryReporter::SizeEnumerator(PresShellPtrKey *aEntry,
void *userArg)
{
PresShell *aShell = static_cast<PresShell*>(aEntry->GetKey());
MemoryReporterData *data = (MemoryReporterData*)userArg;
// Build the string "explicit/layout/shell(<uri of the document>)"
nsCAutoString str("explicit/layout/shell(");
nsIDocument* doc = aShell->GetDocument();
if (doc) {
nsIURI* docURI = doc->GetDocumentURI();
if (docURI) {
nsCString spec;
docURI->GetSpec(spec);
// A hack: replace forward slashes with '\\' so they aren't
// treated as path separators. Users of the reporters
// (such as about:memory) have to undo this change.
spec.ReplaceChar('/', '\\');
str += spec;
}
}
str += NS_LITERAL_CSTRING(")");
NS_NAMED_LITERAL_CSTRING(kArenaDesc, "Memory used by layout PresShell, PresContext, and other related areas.");
NS_NAMED_LITERAL_CSTRING(kStyleDesc, "Memory used by the style system.");
NS_NAMED_LITERAL_CSTRING(kTextRunsDesc, "Memory used for text-runs (glyph layout) in the PresShell's frame tree.");
nsCAutoString arenaPath = str + NS_LITERAL_CSTRING("/arenas");
nsCAutoString stylePath = str + NS_LITERAL_CSTRING("/styledata");
nsCAutoString textRunsPath = str + NS_LITERAL_CSTRING("/textruns");
PRInt64 arenasSize =
aShell->SizeOfIncludingThis(LayoutMallocSizeOf) +
aShell->mPresContext->SizeOfIncludingThis(LayoutMallocSizeOf);
PRInt64 styleSize =
aShell->StyleSet()->SizeOfIncludingThis(LayoutMallocSizeOf);
PRInt64 textRunsSize = aShell->SizeOfTextRuns(LayoutMallocSizeOf);
data->callback->
Callback(EmptyCString(), arenaPath, nsIMemoryReporter::KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES, arenasSize, kArenaDesc,
data->closure);
data->callback->
Callback(EmptyCString(), stylePath, nsIMemoryReporter::KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES, styleSize, kStyleDesc,
data->closure);
if (textRunsSize) {
data->callback->
Callback(EmptyCString(), textRunsPath, nsIMemoryReporter::KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES, textRunsSize, kTextRunsDesc,
data->closure);
}
return PL_DHASH_NEXT;
}
NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(GfxTextrunWordCacheMallocSizeOf, "gfx/textrun-word-cache")
NS_IMETHODIMP
PresShell::MemoryReporter::CollectReports(nsIMemoryMultiReporterCallback* aCb,
nsISupports* aClosure)
{
MemoryReporterData data;
data.callback = aCb;
data.closure = aClosure;
sLiveShells->EnumerateEntries(SizeEnumerator, &data);
return NS_OK;
}
NS_IMETHODIMP
PresShell::MemoryReporter::GetExplicitNonHeap(PRInt64 *aAmount) {
// This reporter doesn't do any KIND_NONHEAP measurements.
*aAmount = 0;
return NS_OK;
}
class nsAutoCauseReflowNotifier
{
public:
nsAutoCauseReflowNotifier(PresShell* aShell)
: mShell(aShell)
{
mShell->WillCauseReflow();
}
~nsAutoCauseReflowNotifier()
{
// This check should not be needed. Currently the only place that seem
// to need it is the code that deals with bug 337586.
if (!mShell->mHaveShutDown) {
mShell->DidCauseReflow();
}
else {
nsContentUtils::RemoveScriptBlocker();
}
}
PresShell* mShell;
};
class NS_STACK_CLASS nsPresShellEventCB : public nsDispatchingCallback
{
public:
nsPresShellEventCB(PresShell* aPresShell) : mPresShell(aPresShell) {}
virtual void HandleEvent(nsEventChainPostVisitor& aVisitor)
{
if (aVisitor.mPresContext && aVisitor.mEvent->eventStructType != NS_EVENT) {
nsIFrame* frame = mPresShell->GetCurrentEventFrame();
if (frame) {
frame->HandleEvent(aVisitor.mPresContext,
(nsGUIEvent*) aVisitor.mEvent,
&aVisitor.mEventStatus);
}
}
}
nsRefPtr<PresShell> mPresShell;
};
bool PresShell::sDisableNonTestMouseEvents = false;
#ifdef PR_LOGGING
PRLogModuleInfo* PresShell::gLog;
#endif
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsPresContext* aPresContext, nsFrameManager* aFrameManager)
{
if (nsFrame::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame = aFrameManager->GetRootFrame();
aFrameManager->DebugVerifyStyleTree(rootFrame);
}
}
#define VERIFY_STYLE_TREE ::VerifyStyleTree(mPresContext, FrameManager())
#else
#define VERIFY_STYLE_TREE
#endif
static bool gVerifyReflowEnabled;
bool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
static bool firstTime = true;
if (firstTime) {
firstTime = false;
char* flags = PR_GetEnv("GECKO_VERIFY_REFLOW_FLAGS");
if (flags) {
bool error = false;
for (;;) {
char* comma = PL_strchr(flags, ',');
if (comma)
*comma = '\0';
bool found = false;
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
if (PL_strcasecmp(flag->name, flags) == 0) {
gVerifyReflowFlags |= flag->bit;
found = true;
break;
}
++flag;
}
if (! found)
error = true;
if (! comma)
break;
*comma = ',';
flags = comma + 1;
}
if (error)
ShowVerifyReflowFlags();
}
if (VERIFY_REFLOW_ON & gVerifyReflowFlags) {
gVerifyReflowEnabled = true;
printf("Note: verifyreflow is enabled");
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf(" (noisy)");
}
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf(" (all)");
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf(" (show reflow commands)");
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf(" (noisy reflow commands)");
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf(" (REALLY noisy reflow commands)");
}
}
printf("\n");
}
}
#endif
return gVerifyReflowEnabled;
}
void
nsIPresShell::SetVerifyReflowEnable(bool aEnabled)
{
gVerifyReflowEnabled = aEnabled;
}
/* virtual */ void
nsIPresShell::AddWeakFrameExternal(nsWeakFrame* aWeakFrame)
{
AddWeakFrameInternal(aWeakFrame);
}
void
nsIPresShell::AddWeakFrameInternal(nsWeakFrame* aWeakFrame)
{
if (aWeakFrame->GetFrame()) {
aWeakFrame->GetFrame()->AddStateBits(NS_FRAME_EXTERNAL_REFERENCE);
}
aWeakFrame->SetPreviousWeakFrame(mWeakFrames);
mWeakFrames = aWeakFrame;
}
/* virtual */ void
nsIPresShell::RemoveWeakFrameExternal(nsWeakFrame* aWeakFrame)
{
RemoveWeakFrameInternal(aWeakFrame);
}
void
nsIPresShell::RemoveWeakFrameInternal(nsWeakFrame* aWeakFrame)
{
if (mWeakFrames == aWeakFrame) {
mWeakFrames = aWeakFrame->GetPreviousWeakFrame();
return;
}
nsWeakFrame* nextWeak = mWeakFrames;
while (nextWeak && nextWeak->GetPreviousWeakFrame() != aWeakFrame) {
nextWeak = nextWeak->GetPreviousWeakFrame();
}
if (nextWeak) {
nextWeak->SetPreviousWeakFrame(aWeakFrame->GetPreviousWeakFrame());
}
}
already_AddRefed<nsFrameSelection>
nsIPresShell::FrameSelection()
{
NS_IF_ADDREF(mSelection);
return mSelection;
}
//----------------------------------------------------------------------
nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (!aInstancePtrResult)
return NS_ERROR_NULL_POINTER;
*aInstancePtrResult = new PresShell();
NS_ADDREF(*aInstancePtrResult);
return NS_OK;
}
nsTHashtable<PresShell::PresShellPtrKey> *nsIPresShell::sLiveShells = 0;
static bool sSynthMouseMove = true;
PresShell::PresShell()
: mMouseLocation(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)
{
mSelection = nsnull;
#ifdef MOZ_REFLOW_PERF
mReflowCountMgr = new ReflowCountMgr();
mReflowCountMgr->SetPresContext(mPresContext);
mReflowCountMgr->SetPresShell(this);
#endif
#ifdef PR_LOGGING
if (! gLog)
gLog = PR_NewLogModule("PresShell");
#endif
mSelectionFlags = nsISelectionDisplay::DISPLAY_TEXT | nsISelectionDisplay::DISPLAY_IMAGES;
mIsThemeSupportDisabled = false;
mIsActive = true;
mFrozen = false;
#ifdef DEBUG
mPresArenaAllocCount = 0;
#endif
mRenderFlags = 0;
mXResolution = 1.0;
mYResolution = 1.0;
mViewportOverridden = false;
static bool registeredReporter = false;
if (!registeredReporter) {
NS_RegisterMemoryMultiReporter(new MemoryReporter);
Preferences::AddBoolVarCache(&sSynthMouseMove,
"layout.reflow.synthMouseMove", true);
registeredReporter = true;
}
new (this) nsFrameManager();
sLiveShells->PutEntry(this);
}
NS_IMPL_ISUPPORTS7(PresShell, nsIPresShell, nsIDocumentObserver,
nsISelectionController,
nsISelectionDisplay, nsIObserver, nsISupportsWeakReference,
nsIMutationObserver)
PresShell::~PresShell()
{
sLiveShells->RemoveEntry(this);
if (!mHaveShutDown) {
NS_NOTREACHED("Someone did not call nsIPresShell::destroy");
Destroy();
}
NS_ASSERTION(mCurrentEventContentStack.Count() == 0,
"Huh, event content left on the stack in pres shell dtor!");
NS_ASSERTION(mFirstCallbackEventRequest == nsnull &&
mLastCallbackEventRequest == nsnull,
"post-reflow queues not empty. This means we're leaking");
#ifdef DEBUG
NS_ASSERTION(mPresArenaAllocCount == 0,
"Some pres arena objects were not freed");
#endif
delete mStyleSet;
delete mFrameConstructor;
mCurrentEventContent = nsnull;
NS_IF_RELEASE(mPresContext);
NS_IF_RELEASE(mDocument);
NS_IF_RELEASE(mSelection);
}
/**
* Initialize the presentation shell. Create view manager and style
* manager.
*/
nsresult
PresShell::Init(nsIDocument* aDocument,
nsPresContext* aPresContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsCompatibility aCompatMode)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_PRECONDITION(nsnull != aDocument, "null ptr");
NS_PRECONDITION(nsnull != aPresContext, "null ptr");
NS_PRECONDITION(nsnull != aViewManager, "null ptr");
nsresult result;
if ((nsnull == aDocument) || (nsnull == aPresContext) ||
(nsnull == aViewManager)) {
return NS_ERROR_NULL_POINTER;
}
if (mDocument) {
NS_WARNING("PresShell double init'ed");
return NS_ERROR_ALREADY_INITIALIZED;
}
result = mStackArena.Init();
NS_ENSURE_SUCCESS(result, result);
if (!mFramesToDirty.Init()) {
return NS_ERROR_OUT_OF_MEMORY;
}
mDocument = aDocument;
NS_ADDREF(mDocument);
mViewManager = aViewManager;
// Create our frame constructor.
mFrameConstructor = new nsCSSFrameConstructor(mDocument, this);
// The document viewer owns both view manager and pres shell.
mViewManager->SetPresShell(this);
// Bind the context to the presentation shell.
mPresContext = aPresContext;
NS_ADDREF(mPresContext);
aPresContext->SetShell(this);
// Now we can initialize the style set.
result = aStyleSet->Init(aPresContext);
NS_ENSURE_SUCCESS(result, result);
// From this point on, any time we return an error we need to make
// sure to null out mStyleSet first, since an error return from this
// method will cause the caller to delete the style set, so we don't
// want to delete it in our destructor.
mStyleSet = aStyleSet;
// Notify our prescontext that it now has a compatibility mode. Note that
// this MUST happen after we set up our style set but before we create any
// frames.
mPresContext->CompatibilityModeChanged();
// setup the preference style rules (no forced reflow), and do it
// before creating any frames.
SetPreferenceStyleRules(false);
NS_ADDREF(mSelection = new nsFrameSelection());
// Create and initialize the frame manager
result = FrameManager()->Init(this, mStyleSet);
if (NS_FAILED(result)) {
NS_WARNING("Frame manager initialization failed");
mStyleSet = nsnull;
return result;
}
mSelection->Init(this, nsnull);
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
// make the caret
mCaret = new nsCaret();
mCaret->Init(this);
mOriginalCaret = mCaret;
//SetCaretEnabled(true); // make it show in browser windows
#endif
//set up selection to be displayed in document
// Don't enable selection for print media
nsPresContext::nsPresContextType type = aPresContext->Type();
if (type != nsPresContext::eContext_PrintPreview &&
type != nsPresContext::eContext_Print)
SetDisplaySelection(nsISelectionController::SELECTION_DISABLED);
if (gMaxRCProcessingTime == -1) {
gMaxRCProcessingTime =
Preferences::GetInt("layout.reflow.timeslice", NS_MAX_REFLOW_TIME);
}
{
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->AddObserver(this, "agent-sheet-added", false);
os->AddObserver(this, "user-sheet-added", false);
os->AddObserver(this, "agent-sheet-removed", false);
os->AddObserver(this, "user-sheet-removed", false);
#ifdef MOZ_XUL
os->AddObserver(this, "chrome-flush-skin-caches", false);
#endif
}
}
// cache the drag service so we can check it during reflows
mDragService = do_GetService("@mozilla.org/widget/dragservice;1");
#ifdef MOZ_REFLOW_PERF
if (mReflowCountMgr) {
bool paintFrameCounts =
Preferences::GetBool("layout.reflow.showframecounts");
bool dumpFrameCounts =
Preferences::GetBool("layout.reflow.dumpframecounts");
bool dumpFrameByFrameCounts =
Preferences::GetBool("layout.reflow.dumpframebyframecounts");
mReflowCountMgr->SetDumpFrameCounts(dumpFrameCounts);
mReflowCountMgr->SetDumpFrameByFrameCounts(dumpFrameByFrameCounts);
mReflowCountMgr->SetPaintFrameCounts(paintFrameCounts);
}
#endif
if (mDocument->HasAnimationController()) {
nsSMILAnimationController* animCtrl = mDocument->GetAnimationController();
animCtrl->NotifyRefreshDriverCreated(GetPresContext()->RefreshDriver());
}
// Get our activeness from the docShell.
QueryIsActive();
return NS_OK;
}
void
PresShell::Destroy()
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"destroy called on presshell while scripts not blocked");
#ifdef MOZ_REFLOW_PERF
DumpReflows();
if (mReflowCountMgr) {
delete mReflowCountMgr;
mReflowCountMgr = nsnull;
}
#endif
if (mHaveShutDown)
return;
#ifdef ACCESSIBILITY
nsAccessibilityService* accService = AccService();
if (accService) {
accService->PresShellDestroyed(this);
}
#endif // ACCESSIBILITY
MaybeReleaseCapturingContent();
if (gKeyDownTarget && gKeyDownTarget->OwnerDoc() == mDocument) {
NS_RELEASE(gKeyDownTarget);
}
mContentToScrollTo = nsnull;
if (mPresContext) {
// We need to notify the destroying the nsPresContext to ESM for
// suppressing to use from ESM.
mPresContext->EventStateManager()->NotifyDestroyPresContext(mPresContext);
}
{
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->RemoveObserver(this, "agent-sheet-added");
os->RemoveObserver(this, "user-sheet-added");
os->RemoveObserver(this, "agent-sheet-removed");
os->RemoveObserver(this, "user-sheet-removed");
#ifdef MOZ_XUL
os->RemoveObserver(this, "chrome-flush-skin-caches");
#endif
}
}
// If our paint suppression timer is still active, kill it.
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
// Same for our reflow continuation timer
if (mReflowContinueTimer) {
mReflowContinueTimer->Cancel();
mReflowContinueTimer = nsnull;
}
mSynthMouseMoveEvent.Revoke();
if (mCaret) {
mCaret->Terminate();
mCaret = nsnull;
}
if (mSelection) {
mSelection->DisconnectFromPresShell();
}
// release our pref style sheet, if we have one still
ClearPreferenceStyleRules();
mIsDestroying = true;
// We can't release all the event content in
// mCurrentEventContentStack here since there might be code on the
// stack that will release the event content too. Double release
// bad!
// The frames will be torn down, so remove them from the current
// event frame stack (since they'd be dangling references if we'd
// leave them in) and null out the mCurrentEventFrame pointer as
// well.
mCurrentEventFrame = nsnull;
PRInt32 i, count = mCurrentEventFrameStack.Length();
for (i = 0; i < count; i++) {
mCurrentEventFrameStack[i] = nsnull;
}
mFramesToDirty.Clear();
if (mViewManager) {
// Clear the view manager's weak pointer back to |this| in case it
// was leaked.
mViewManager->SetPresShell(nsnull);
mViewManager = nsnull;
}
mStyleSet->BeginShutdown(mPresContext);
nsRefreshDriver* rd = GetPresContext()->RefreshDriver();
// This shell must be removed from the document before the frame
// hierarchy is torn down to avoid finding deleted frames through
// this presshell while the frames are being torn down
if (mDocument) {
NS_ASSERTION(mDocument->GetShell() == this, "Wrong shell?");
mDocument->DeleteShell();
if (mDocument->HasAnimationController()) {
mDocument->GetAnimationController()->NotifyRefreshDriverDestroying(rd);
}
}
// Revoke any pending events. We need to do this and cancel pending reflows
// before we destroy the frame manager, since apparently frame destruction
// sometimes spins the event queue when plug-ins are involved(!).
rd->RemoveLayoutFlushObserver(this);
rd->RevokeViewManagerFlush();
mResizeEvent.Revoke();
if (mAsyncResizeTimerIsActive) {
mAsyncResizeEventTimer->Cancel();
mAsyncResizeTimerIsActive = false;
}
CancelAllPendingReflows();
CancelPostedReflowCallbacks();
// Destroy the frame manager. This will destroy the frame hierarchy
mFrameConstructor->WillDestroyFrameTree();
FrameManager()->Destroy();
// Destroy all frame properties (whose destruction was suppressed
// while destroying the frame tree, but which might contain more
// frames within the properties.
if (mPresContext) {
// Clear out the prescontext's property table -- since our frame tree is
// now dead, we shouldn't be looking up any more properties in that table.
// We want to do this before we call SetShell() on the prescontext, so
// property destructors can usefully call GetPresShell() on the
// prescontext.
mPresContext->PropertyTable()->DeleteAll();
}
NS_WARN_IF_FALSE(!mWeakFrames, "Weak frames alive after destroying FrameManager");
while (mWeakFrames) {
mWeakFrames->Clear(this);
}
// Let the style set do its cleanup.
mStyleSet->Shutdown(mPresContext);
if (mPresContext) {
// We hold a reference to the pres context, and it holds a weak link back
// to us. To avoid the pres context having a dangling reference, set its
// pres shell to NULL
mPresContext->SetShell(nsnull);
// Clear the link handler (weak reference) as well
mPresContext->SetLinkHandler(nsnull);
}
mHaveShutDown = true;
}
// Dynamic stack memory allocation
/* virtual */ void
PresShell::PushStackMemory()
{
mStackArena.Push();
}
/* virtual */ void
PresShell::PopStackMemory()
{
mStackArena.Pop();
}
/* virtual */ void*
PresShell::AllocateStackMemory(size_t aSize)
{
return mStackArena.Allocate(aSize);
}
void
PresShell::FreeFrame(nsQueryFrame::FrameIID aCode, void* aPtr)
{
#ifdef DEBUG
mPresArenaAllocCount--;
#endif
if (PRESARENA_MUST_FREE_DURING_DESTROY || !mIsDestroying)
mFrameArena.FreeByCode(aCode, aPtr);
}
void*
PresShell::AllocateFrame(nsQueryFrame::FrameIID aCode, size_t aSize)
{
#ifdef DEBUG
mPresArenaAllocCount++;
#endif
void* result = mFrameArena.AllocateByCode(aCode, aSize);
if (result) {
memset(result, 0, aSize);
}
return result;
}
void
PresShell::FreeMisc(size_t aSize, void* aPtr)
{
#ifdef DEBUG
mPresArenaAllocCount--;
#endif
if (PRESARENA_MUST_FREE_DURING_DESTROY || !mIsDestroying)
mFrameArena.FreeBySize(aSize, aPtr);
}
void*
PresShell::AllocateMisc(size_t aSize)
{
#ifdef DEBUG
mPresArenaAllocCount++;
#endif
return mFrameArena.AllocateBySize(aSize);
}
void
nsIPresShell::SetAuthorStyleDisabled(bool aStyleDisabled)
{
if (aStyleDisabled != mStyleSet->GetAuthorStyleDisabled()) {
mStyleSet->SetAuthorStyleDisabled(aStyleDisabled);
ReconstructStyleData();
}
}
bool
nsIPresShell::GetAuthorStyleDisabled() const
{
return mStyleSet->GetAuthorStyleDisabled();
}
nsresult
PresShell::SetPreferenceStyleRules(bool aForceReflow)
{
NS_TIME_FUNCTION_MIN(1.0);
if (!mDocument) {
return NS_ERROR_NULL_POINTER;
}
nsPIDOMWindow *window = mDocument->GetWindow();
// If the document doesn't have a window there's no need to notify
// its presshell about changes to preferences since the document is
// in a state where it doesn't matter any more (see
// DocumentViewerImpl::Close()).
if (!window) {
return NS_ERROR_NULL_POINTER;
}
NS_PRECONDITION(mPresContext, "presContext cannot be null");
if (mPresContext) {
// first, make sure this is not a chrome shell
if (nsContentUtils::IsInChromeDocshell(mDocument)) {
return NS_OK;
}
#ifdef DEBUG_attinasi
printf("Setting Preference Style Rules:\n");
#endif
// if here, we need to create rules for the prefs
// - this includes the background-color, the text-color,
// the link color, the visited link color and the link-underlining
// first clear any exising rules
nsresult result = ClearPreferenceStyleRules();
// now the link rules (must come after the color rules, or links will not be correct color!)
// XXX - when there is both an override and agent pref stylesheet this won't matter,
// as the color rules will be overrides and the links rules will be agent
if (NS_SUCCEEDED(result)) {
result = SetPrefLinkRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefFocusRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoScriptRule();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoFramesRule();
}
#ifdef DEBUG_attinasi
printf( "Preference Style Rules set: error=%ld\n", (long)result);
#endif
// Note that this method never needs to force any calculation; the caller
// will recalculate style if needed
return result;
}
return NS_ERROR_NULL_POINTER;
}
nsresult PresShell::ClearPreferenceStyleRules(void)
{
nsresult result = NS_OK;
if (mPrefStyleSheet) {
NS_ASSERTION(mStyleSet, "null styleset entirely unexpected!");
if (mStyleSet) {
// remove the sheet from the styleset:
// - note that we have to check for success by comparing the count before and after...
#ifdef NS_DEBUG
PRInt32 numBefore = mStyleSet->SheetCount(nsStyleSet::eUserSheet);
NS_ASSERTION(numBefore > 0, "no user stylesheets in styleset, but we have one!");
#endif
mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
#ifdef DEBUG_attinasi
NS_ASSERTION((numBefore - 1) == mStyleSet->GetNumberOfUserStyleSheets(),
"Pref stylesheet was not removed");
printf("PrefStyleSheet removed\n");
#endif
// clear the sheet pointer: it is strictly historical now
mPrefStyleSheet = nsnull;
}
}
return result;
}
nsresult PresShell::CreatePreferenceStyleSheet(void)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ASSERTION(!mPrefStyleSheet, "prefStyleSheet already exists");
nsresult result = NS_NewCSSStyleSheet(getter_AddRefs(mPrefStyleSheet));
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "null but no error");
nsCOMPtr<nsIURI> uri;
result = NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nsnull);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(uri, "null but no error");
mPrefStyleSheet->SetURIs(uri, uri, uri);
mPrefStyleSheet->SetComplete();
PRUint32 index;
result =
mPrefStyleSheet->InsertRuleInternal(NS_LITERAL_STRING("@namespace url(http://www.w3.org/1999/xhtml);"),
0, &index);
if (NS_SUCCEEDED(result)) {
mStyleSet->AppendStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
}
}
}
#ifdef DEBUG_attinasi
printf("CreatePrefStyleSheet completed: error=%ld\n",(long)result);
#endif
if (NS_FAILED(result)) {
mPrefStyleSheet = nsnull;
}
return result;
}
// XXX We want these after the @namespace rule. Does order matter
// for these rules, or can we call StyleRule::StyleRuleCount()
// and just "append"?
static PRUint32 sInsertPrefSheetRulesAt = 1;
nsresult
PresShell::SetPrefNoScriptRule()
{
NS_TIME_FUNCTION_MIN(1.0);
nsresult rv = NS_OK;
// also handle the case where print is done from print preview
// see bug #342439 for more details
nsIDocument* doc = mDocument;
if (mPresContext->Type() == nsPresContext::eContext_PrintPreview ||
mPresContext->Type() == nsPresContext::eContext_Print) {
while (doc->GetOriginalDocument()) {
doc = doc->GetOriginalDocument();
}
}
bool scriptEnabled = doc->IsScriptEnabled();
if (scriptEnabled) {
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
PRUint32 index = 0;
mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("noscript{display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefNoFramesRule(void)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
bool allowSubframes = true;
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (docShell) {
docShell->GetAllowSubframes(&allowSubframes);
}
if (!allowSubframes) {
PRUint32 index = 0;
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("noframes{display:block}"),
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("frame, frameset, iframe {display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefLinkRules(void)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// support default link colors:
// this means the link colors need to be overridable,
// which they are if we put them in the agent stylesheet,
// though if using an override sheet this will cause authors grief still
// In the agent stylesheet, they are !important when we are ignoring document colors
nscolor linkColor(mPresContext->DefaultLinkColor());
nscolor activeColor(mPresContext->DefaultActiveLinkColor());
nscolor visitedColor(mPresContext->DefaultVisitedLinkColor());
NS_NAMED_LITERAL_STRING(ruleClose, "}");
PRUint32 index = 0;
nsAutoString strColor;
// insert a rule to color links: '*|*:link {color: #RRGGBB [!important];}'
ColorToString(linkColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:link{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - visited links: '*|*:visited {color: #RRGGBB [!important];}'
ColorToString(visitedColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:visited{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - active links: '*|*:-moz-any-link:active {color: #RRGGBB [!important];}'
ColorToString(activeColor, strColor);
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link:active{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
bool underlineLinks =
mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
if (underlineLinks) {
// create a rule to make underlining happen
// '*|*:-moz-any-link {text-decoration:[underline|none];}'
// no need for important, we want these to be overridable
// NOTE: these must go in the agent stylesheet or they cannot be
// overridden by authors
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:underline}"),
sInsertPrefSheetRulesAt, &index);
} else {
rv = mPrefStyleSheet->
InsertRuleInternal(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:none}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefFocusRules(void)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ASSERTION(mPresContext,"null prescontext not allowed");
nsresult result = NS_OK;
if (!mPresContext)
result = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(result) && !mPrefStyleSheet)
result = CreatePreferenceStyleSheet();
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
if (mPresContext->GetUseFocusColors()) {
nscolor focusBackground(mPresContext->FocusBackgroundColor());
nscolor focusText(mPresContext->FocusTextColor());
// insert a rule to make focus the preferred color
PRUint32 index = 0;
nsAutoString strRule, strColor;
///////////////////////////////////////////////////////////////
// - focus: '*:focus
ColorToString(focusText,strColor);
strRule.AppendLiteral("*:focus,*:focus>font {color: ");
strRule.Append(strColor);
strRule.AppendLiteral(" !important; background-color: ");
ColorToString(focusBackground,strColor);
strRule.Append(strColor);
strRule.AppendLiteral(" !important; } ");
// insert the rules
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
}
PRUint8 focusRingWidth = mPresContext->FocusRingWidth();
bool focusRingOnAnything = mPresContext->GetFocusRingOnAnything();
PRUint8 focusRingStyle = mPresContext->GetFocusRingStyle();
if ((NS_SUCCEEDED(result) && focusRingWidth != 1 && focusRingWidth <= 4 ) || focusRingOnAnything) {
PRUint32 index = 0;
nsAutoString strRule;
if (!focusRingOnAnything)
strRule.AppendLiteral("*|*:link:focus, *|*:visited"); // If we only want focus rings on the normal things like links
strRule.AppendLiteral(":focus {outline: "); // For example 3px dotted WindowText (maximum 4)
strRule.AppendInt(focusRingWidth);
if (focusRingStyle == 0) // solid
strRule.AppendLiteral("px solid -moz-mac-focusring !important; -moz-outline-radius: 3px; outline-offset: 1px; } ");
else // dotted
strRule.AppendLiteral("px dotted WindowText !important; } ");
// insert the rules
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
if (focusRingWidth != 1) {
// If the focus ring width is different from the default, fix buttons with rings
strRule.AssignLiteral("button::-moz-focus-inner, input[type=\"reset\"]::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]::-moz-focus-inner, ");
strRule.AppendLiteral("input[type=\"submit\"]::-moz-focus-inner { padding: 1px 2px 1px 2px; border: ");
strRule.AppendInt(focusRingWidth);
if (focusRingStyle == 0) // solid
strRule.AppendLiteral("px solid transparent !important; } ");
else
strRule.AppendLiteral("px dotted transparent !important; } ");
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
strRule.AssignLiteral("button:focus::-moz-focus-inner, input[type=\"reset\"]:focus::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]:focus::-moz-focus-inner, input[type=\"submit\"]:focus::-moz-focus-inner {");
strRule.AppendLiteral("border-color: ButtonText !important; }");
result = mPrefStyleSheet->
InsertRuleInternal(strRule, sInsertPrefSheetRulesAt, &index);
}
}
}
return result;
}
void
PresShell::AddUserSheet(nsISupports* aSheet)
{
// Make sure this does what DocumentViewerImpl::CreateStyleSet does wrt
// ordering. We want this new sheet to come after all the existing stylesheet
// service sheets, but before other user sheets; see nsIStyleSheetService.idl
// for the ordering. Just remove and readd all the nsStyleSheetService
// sheets.
nsCOMPtr<nsIStyleSheetService> dummy =
do_GetService(NS_STYLESHEETSERVICE_CONTRACTID);
mStyleSet->BeginUpdate();
nsStyleSheetService *sheetService = nsStyleSheetService::gInstance;
nsCOMArray<nsIStyleSheet> & userSheets = *sheetService->UserStyleSheets();
PRInt32 i;
// Iterate forwards when removing so the searches for RemoveStyleSheet are as
// short as possible.
for (i = 0; i < userSheets.Count(); ++i) {
mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, userSheets[i]);
}
// Now iterate backwards, so that the order of userSheets will be the same as
// the order of sheets from it in the style set.
for (i = userSheets.Count() - 1; i >= 0; --i) {
mStyleSet->PrependStyleSheet(nsStyleSet::eUserSheet, userSheets[i]);
}
mStyleSet->EndUpdate();
ReconstructStyleData();
}
void
PresShell::AddAgentSheet(nsISupports* aSheet)
{
// Make sure this does what DocumentViewerImpl::CreateStyleSet does
// wrt ordering.
nsCOMPtr<nsIStyleSheet> sheet = do_QueryInterface(aSheet);
if (!sheet) {
return;
}
mStyleSet->AppendStyleSheet(nsStyleSet::eAgentSheet, sheet);
ReconstructStyleData();
}
void
PresShell::RemoveSheet(nsStyleSet::sheetType aType, nsISupports* aSheet)
{
nsCOMPtr<nsIStyleSheet> sheet = do_QueryInterface(aSheet);
if (!sheet) {
return;
}
mStyleSet->RemoveStyleSheet(aType, sheet);
ReconstructStyleData();
}
NS_IMETHODIMP
PresShell::SetDisplaySelection(PRInt16 aToggle)
{
mSelection->SetDisplaySelection(aToggle);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetDisplaySelection(PRInt16 *aToggle)
{
*aToggle = mSelection->GetDisplaySelection();
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetSelection(SelectionType aType, nsISelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
*aSelection = mSelection->GetSelection(aType);
if (!(*aSelection))
return NS_ERROR_INVALID_ARG;
NS_ADDREF(*aSelection);
return NS_OK;
}
nsISelection*
PresShell::GetCurrentSelection(SelectionType aType)
{
if (!mSelection)
return nsnull;
return mSelection->GetSelection(aType);
}
NS_IMETHODIMP
PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion,
PRInt16 aFlags)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->ScrollSelectionIntoView(aType, aRegion, aFlags);
}
NS_IMETHODIMP
PresShell::RepaintSelection(SelectionType aType)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->RepaintSelection(aType);
}
// Make shell be a document observer
void
PresShell::BeginObservingDocument()
{
if (mDocument && !mIsDestroying) {
mDocument->AddObserver(this);
if (mIsDocumentGone) {
NS_WARNING("Adding a presshell that was disconnected from the document "
"as a document observer? Sounds wrong...");
mIsDocumentGone = false;
}
}
}
// Make shell stop being a document observer
void
PresShell::EndObservingDocument()
{
// XXXbz do we need to tell the frame constructor that the document
// is gone, perhaps? Except for printing it's NOT gone, sometimes.
mIsDocumentGone = true;
if (mDocument) {
mDocument->RemoveObserver(this);
}
}
#ifdef DEBUG_kipp
char* nsPresShell_ReflowStackPointerTop;
#endif
nsresult
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
if (mIsDestroying) {
return NS_OK;
}
if (!mDocument) {
// Nothing to do
return NS_OK;
}
NS_TIME_FUNCTION_WITH_DOCURL;
mozilla::TimeStamp timerStart = mozilla::TimeStamp::Now();
NS_ASSERTION(!mDidInitialReflow, "Why are we being called?");
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
mDidInitialReflow = true;
#ifdef NS_DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
nsCAutoString url;
uri->GetSpec(url);
printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", (void*)this, url.get());
}
}
}
#endif
if (mCaret)
mCaret->EraseCaret();
// XXX Do a full invalidate at the beginning so that invalidates along
// the way don't have region accumulation issues?
mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight));
// Get the root frame from the frame manager
// XXXbz it would be nice to move this somewhere else... like frame manager
// Init(), say. But we need to make sure our views are all set up by the
// time we do this!
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
NS_ASSERTION(!rootFrame, "How did that happen, exactly?");
if (!rootFrame) {
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->BeginUpdate();
mFrameConstructor->ConstructRootFrame(&rootFrame);
FrameManager()->SetRootFrame(rootFrame);
mFrameConstructor->EndUpdate();
}
NS_ENSURE_STATE(!mHaveShutDown);
if (!rootFrame) {
return NS_ERROR_OUT_OF_MEMORY;
}
Element *root = mDocument->GetRootElement();
if (root) {
{
nsAutoCauseReflowNotifier reflowNotifier(this);
mFrameConstructor->BeginUpdate();
// Have the style sheet processor construct frame for the root
// content object down
mFrameConstructor->ContentInserted(nsnull, root, nsnull, false);
VERIFY_STYLE_TREE;
// Something in mFrameConstructor->ContentInserted may have caused
// Destroy() to get called, bug 337586.
NS_ENSURE_STATE(!mHaveShutDown);
mFrameConstructor->EndUpdate();
}
// nsAutoScriptBlocker going out of scope may have killed us too
NS_ENSURE_STATE(!mHaveShutDown);
// Run the XBL binding constructors for any new frames we've constructed
mDocument->BindingManager()->ProcessAttachedQueue();
NS_TIME_FUNCTION_MARK("XBL binding constructors fired");
// Constructors may have killed us too
NS_ENSURE_STATE(!mHaveShutDown);
// Now flush out pending restyles before we actually reflow, in
// case XBL constructors changed styles somewhere.
{
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->CreateNeededFrames();
mFrameConstructor->ProcessPendingRestyles();
}
// And that might have run _more_ XBL constructors
NS_ENSURE_STATE(!mHaveShutDown);
}
NS_ASSERTION(rootFrame, "How did that happen?");
// Note: when the frame was created above it had the NS_FRAME_IS_DIRTY bit
// set, but XBL processing could have caused a reflow which clears it.
if (NS_LIKELY(rootFrame->GetStateBits() & NS_FRAME_IS_DIRTY)) {
// Unset the DIRTY bits so that FrameNeedsReflow() will work right.
rootFrame->RemoveStateBits(NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
NS_ASSERTION(!mDirtyRoots.Contains(rootFrame),
"Why is the root in mDirtyRoots already?");
FrameNeedsReflow(rootFrame, eResize, NS_FRAME_IS_DIRTY);
NS_ASSERTION(mDirtyRoots.Contains(rootFrame),
"Should be in mDirtyRoots now");
NS_ASSERTION(mReflowScheduled, "Why no reflow scheduled?");
}
// Restore our root scroll position now if we're getting here after EndLoad
// got called, since this is our one chance to do it. Note that we need not
// have reflowed for this to work; when the scrollframe is finally reflowed
// it'll puick up the position we store in it here.
if (!mDocumentLoading) {
RestoreRootScrollPosition();
}
// For printing, we just immediately unsuppress.
if (!mPresContext->IsPaginated()) {
// Kick off a one-shot timer based off our pref value. When this timer
// fires, if painting is still locked down, then we will go ahead and
// trigger a full invalidate and allow painting to proceed normally.
mPaintingSuppressed = true;
// Don't suppress painting if the document isn't loading.
nsIDocument::ReadyState readyState = mDocument->GetReadyStateEnum();
if (readyState != nsIDocument::READYSTATE_COMPLETE) {
mPaintSuppressionTimer = do_CreateInstance("@mozilla.org/timer;1");
}
if (!mPaintSuppressionTimer) {
mPaintingSuppressed = false;
} else {
// Initialize the timer.
// Default to PAINTLOCK_EVENT_DELAY if we can't get the pref value.
PRInt32 delay =
Preferences::GetInt("nglayout.initialpaint.delay",
PAINTLOCK_EVENT_DELAY);
mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback,
this, delay,
nsITimer::TYPE_ONE_SHOT);
}
}
if (root && root->IsXUL()) {
mozilla::Telemetry::AccumulateTimeDelta(Telemetry::XUL_INITIAL_FRAME_CONSTRUCTION,
timerStart);
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::sPaintSuppressionCallback(nsITimer *aTimer, void* aPresShell)
{
nsRefPtr<PresShell> self = static_cast<PresShell*>(aPresShell);
if (self)
self->UnsuppressPainting();
}
void
PresShell::AsyncResizeEventCallback(nsITimer* aTimer, void* aPresShell)
{
static_cast<PresShell*>(aPresShell)->FireResizeEvent();
}
nsresult
PresShell::ResizeReflowOverride(nscoord aWidth, nscoord aHeight)
{
mViewportOverridden = true;
return ResizeReflowIgnoreOverride(aWidth, aHeight);
}
nsresult
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
if (mViewportOverridden) {
// The viewport has been overridden, and this reflow request
// didn't ask to ignore the override. Pretend it didn't happen.
return NS_OK;
}
return ResizeReflowIgnoreOverride(aWidth, aHeight);
}
nsresult
PresShell::ResizeReflowIgnoreOverride(nscoord aWidth, nscoord aHeight)
{
NS_PRECONDITION(!mIsReflowing, "Shouldn't be in reflow here!");
NS_PRECONDITION(aWidth != NS_UNCONSTRAINEDSIZE,
"shouldn't use unconstrained widths anymore");
// If we don't have a root frame yet, that means we haven't had our initial
// reflow... If that's the case, and aWidth or aHeight is unconstrained,
// ignore them altogether.
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame && aHeight == NS_UNCONSTRAINEDSIZE) {
// We can't do the work needed for SizeToContent without a root
// frame, and we want to return before setting the visible area.
return NS_ERROR_NOT_AVAILABLE;
}
nsCOMPtr<nsIViewManager> viewManagerDeathGrip = mViewManager;
// Take this ref after viewManager so it'll make sure to go away first
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
if (!mIsDestroying && !mResizeEvent.IsPending() &&
!mAsyncResizeTimerIsActive) {
FireBeforeResizeEvent();
}
mPresContext->SetVisibleArea(nsRect(0, 0, aWidth, aHeight));
// There isn't anything useful we can do if the initial reflow hasn't happened
rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame)
return NS_OK;
if (!GetPresContext()->SupressingResizeReflow())
{
// Have to make sure that the content notifications are flushed before we
// start messing with the frame model; otherwise we can get content doubling.
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
// Make sure style is up to date
{
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->CreateNeededFrames();
mFrameConstructor->ProcessPendingRestyles();
}
rootFrame = FrameManager()->GetRootFrame();
if (!mIsDestroying && rootFrame) {
// XXX Do a full invalidate at the beginning so that invalidates along
// the way don't have region accumulation issues?
{
nsAutoCauseReflowNotifier crNotifier(this);
WillDoReflow();
// Kick off a top-down reflow
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow);
nsIViewManager::AutoDisableRefresh refreshBlocker(mViewManager);
mDirtyRoots.RemoveElement(rootFrame);
DoReflow(rootFrame, true);
}
DidDoReflow(true);
}
}
rootFrame = FrameManager()->GetRootFrame();
if (aHeight == NS_UNCONSTRAINEDSIZE && rootFrame) {
mPresContext->SetVisibleArea(
nsRect(0, 0, aWidth, rootFrame->GetRect().height));
}
if (!mIsDestroying && !mResizeEvent.IsPending() &&
!mAsyncResizeTimerIsActive) {
if (mInResize) {
if (!mAsyncResizeEventTimer) {
mAsyncResizeEventTimer = do_CreateInstance("@mozilla.org/timer;1");
}
if (mAsyncResizeEventTimer) {
mAsyncResizeTimerIsActive = true;
mAsyncResizeEventTimer->InitWithFuncCallback(AsyncResizeEventCallback,
this, 15,
nsITimer::TYPE_ONE_SHOT);
}
} else {
nsRefPtr<nsRunnableMethod<PresShell> > resizeEvent =
NS_NewRunnableMethod(this, &PresShell::FireResizeEvent);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(resizeEvent))) {
mResizeEvent = resizeEvent;
mDocument->SetNeedStyleFlush();
}
}
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::FireBeforeResizeEvent()
{
if (mIsDocumentGone)
return;
// Send beforeresize event from here.
nsEvent event(true, NS_BEFORERESIZE_EVENT);
nsPIDOMWindow *window = mDocument->GetWindow();
if (window) {
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
nsEventDispatcher::Dispatch(window, mPresContext, &event);
}
}
void
PresShell::FireResizeEvent()
{
if (mAsyncResizeTimerIsActive) {
mAsyncResizeTimerIsActive = false;
mAsyncResizeEventTimer->Cancel();
}
mResizeEvent.Revoke();
if (mIsDocumentGone)
return;
//Send resize event from here.
nsEvent event(true, NS_RESIZE_EVENT);
nsEventStatus status = nsEventStatus_eIgnore;
nsPIDOMWindow *window = mDocument->GetWindow();
if (window) {
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
mInResize = true;
nsEventDispatcher::Dispatch(window, mPresContext, &event, nsnull, &status);
mInResize = false;
}
}
void
PresShell::SetIgnoreFrameDestruction(bool aIgnore)
{
if (mPresContext) {
// We need to destroy the image loaders first, as they won't be
// notified when frames are destroyed once this setting takes effect.
// (See bug 673984)
mPresContext->DestroyImageLoaders();
}
mIgnoreFrameDestruction = aIgnore;
}
void
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame)
{
NS_TIME_FUNCTION_MIN(1.0);
mPresContext->ForgetUpdatePluginGeometryFrame(aFrame);
if (!mIgnoreFrameDestruction) {
mPresContext->StopImagesFor(aFrame);
mFrameConstructor->NotifyDestroyingFrame(aFrame);
for (PRInt32 idx = mDirtyRoots.Length(); idx; ) {
--idx;
if (mDirtyRoots[idx] == aFrame) {
mDirtyRoots.RemoveElementAt(idx);
}
}
// Notify the frame manager
FrameManager()->NotifyDestroyingFrame(aFrame);
// Remove frame properties
mPresContext->NotifyDestroyingFrame(aFrame);
if (aFrame == mCurrentEventFrame) {
mCurrentEventContent = aFrame->GetContent();
mCurrentEventFrame = nsnull;
}
#ifdef NS_DEBUG
if (aFrame == mDrawEventTargetFrame) {
mDrawEventTargetFrame = nsnull;
}
#endif
for (unsigned int i=0; i < mCurrentEventFrameStack.Length(); i++) {
if (aFrame == mCurrentEventFrameStack.ElementAt(i)) {
//One of our stack frames was deleted. Get its content so that when we
//pop it we can still get its new frame from its content
nsIContent *currentEventContent = aFrame->GetContent();
mCurrentEventContentStack.ReplaceObjectAt(currentEventContent, i);
mCurrentEventFrameStack[i] = nsnull;
}
}
mFramesToDirty.RemoveEntry(aFrame);
}
}
already_AddRefed<nsCaret> PresShell::GetCaret() const
{
nsCaret* caret = mCaret;
NS_IF_ADDREF(caret);
return caret;
}
void PresShell::MaybeInvalidateCaretPosition()
{
if (mCaret) {
mCaret->InvalidateOutsideCaret();
}
}
void PresShell::SetCaret(nsCaret *aNewCaret)
{
mCaret = aNewCaret;
}
void PresShell::RestoreCaret()
{
mCaret = mOriginalCaret;
}
NS_IMETHODIMP PresShell::SetCaretEnabled(bool aInEnable)
{
bool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
/* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled()
nsCOMPtr<nsIDOMSelection> domSel;
if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel)
mCaret->SetCaretDOMSelection(domSel);
*/
mCaret->SetCaretVisible(mCaretEnabled);
}
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretReadOnly(bool aReadOnly)
{
if (mCaret)
mCaret->SetCaretReadOnly(aReadOnly);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaretEnabled(bool *aOutEnabled)
{
NS_ENSURE_ARG_POINTER(aOutEnabled);
*aOutEnabled = mCaretEnabled;
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretVisibilityDuringSelection(bool aVisibility)
{
if (mCaret)
mCaret->SetVisibilityDuringSelection(aVisibility);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaretVisible(bool *aOutIsVisible)
{
*aOutIsVisible = false;
if (mCaret) {
nsresult rv = mCaret->GetCaretVisible(aOutIsVisible);
NS_ENSURE_SUCCESS(rv,rv);
}
return NS_OK;
}
NS_IMETHODIMP PresShell::SetSelectionFlags(PRInt16 aInEnable)
{
mSelectionFlags = aInEnable;
return NS_OK;
}
NS_IMETHODIMP PresShell::GetSelectionFlags(PRInt16 *aOutEnable)
{
if (!aOutEnable)
return NS_ERROR_INVALID_ARG;
*aOutEnable = mSelectionFlags;
return NS_OK;
}
//implementation of nsISelectionController
NS_IMETHODIMP
PresShell::CharacterMove(bool aForward, bool aExtend)
{
return mSelection->CharacterMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::CharacterExtendForDelete()
{
return mSelection->CharacterExtendForDelete();
}
NS_IMETHODIMP
PresShell::CharacterExtendForBackspace()
{
return mSelection->CharacterExtendForBackspace();
}
NS_IMETHODIMP
PresShell::WordMove(bool aForward, bool aExtend)
{
nsresult result = mSelection->WordMove(aForward, aExtend);
// if we can't go down/up any more we must then move caret completely to
// end/beginning respectively.
if (NS_FAILED(result))
result = CompleteMove(aForward, aExtend);
return result;
}
NS_IMETHODIMP
PresShell::WordExtendForDelete(bool aForward)
{
return mSelection->WordExtendForDelete(aForward);
}
NS_IMETHODIMP
PresShell::LineMove(bool aForward, bool aExtend)
{
nsresult result = mSelection->LineMove(aForward, aExtend);
// if we can't go down/up any more we must then move caret completely to
// end/beginning respectively.
if (NS_FAILED(result))
result = CompleteMove(aForward,aExtend);
return result;
}
NS_IMETHODIMP
PresShell::IntraLineMove(bool aForward, bool aExtend)
{
return mSelection->IntraLineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::PageMove(bool aForward, bool aExtend)
{
nsIScrollableFrame *scrollableFrame =
GetFrameToScrollAsScrollable(nsIPresShell::eVertical);
if (!scrollableFrame)
return NS_OK;
mSelection->CommonPageMove(aForward, aExtend, scrollableFrame);
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_SYNCHRONOUS);
}
NS_IMETHODIMP
PresShell::ScrollPage(bool aForward)
{
nsIScrollableFrame* scrollFrame =
GetFrameToScrollAsScrollable(nsIPresShell::eVertical);
if (scrollFrame) {
scrollFrame->ScrollBy(nsIntPoint(0, aForward ? 1 : -1),
nsIScrollableFrame::PAGES,
nsIScrollableFrame::SMOOTH);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollLine(bool aForward)
{
nsIScrollableFrame* scrollFrame =
GetFrameToScrollAsScrollable(nsIPresShell::eVertical);
if (scrollFrame) {
// Scroll 2 lines at a time to improve scrolling speed.
PRInt32 lineCount = 2;
scrollFrame->ScrollBy(nsIntPoint(0, aForward ? lineCount : -lineCount),
nsIScrollableFrame::LINES,
nsIScrollableFrame::SMOOTH);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollCharacter(bool aRight)
{
nsIScrollableFrame* scrollFrame =
GetFrameToScrollAsScrollable(nsIPresShell::eHorizontal);
if (scrollFrame) {
scrollFrame->ScrollBy(nsIntPoint(aRight ? 1 : -1, 0),
nsIScrollableFrame::LINES,
nsIScrollableFrame::SMOOTH);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteScroll(bool aForward)
{
nsIScrollableFrame* scrollFrame =
GetFrameToScrollAsScrollable(nsIPresShell::eVertical);
if (scrollFrame) {
scrollFrame->ScrollBy(nsIntPoint(0, aForward ? 1 : -1),
nsIScrollableFrame::WHOLE,
nsIScrollableFrame::INSTANT);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteMove(bool aForward, bool aExtend)
{
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
nsIContent* limiter = mSelection->GetAncestorLimiter();
nsIFrame* frame = limiter ? limiter->GetPrimaryFrame()
: FrameConstructor()->GetRootElementFrame();
if (!frame)
return NS_ERROR_FAILURE;
nsPeekOffsetStruct pos = frame->GetExtremeCaretPosition(!aForward);
mSelection->HandleClick(pos.mResultContent, pos.mContentOffset,
pos.mContentOffset, aExtend, false, aForward);
if (limiter) {
// HandleClick resets ancestorLimiter, so set it again.
mSelection->SetAncestorLimiter(limiter);
}
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_SYNCHRONOUS);
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
NS_IMETHODIMP
PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, bool *_retval)
{
if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0)
return NS_ERROR_INVALID_ARG;
*_retval = false; //initialize return parameter
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return NS_ERROR_FAILURE;
nsIFrame *frame = content->GetPrimaryFrame();
if (!frame) //no frame to look at so it must not be visible
return NS_OK;
//start process now to go through all frames to find startOffset. then check chars after that to see
//if anything until EndOffset is visible.
bool finished = false;
frame->CheckVisibility(mPresContext,startOffset,EndOffset,true,&finished, _retval);
return NS_OK;//dont worry about other return val
}
//end implementations nsISelectionController
void
PresShell::StyleChangeReflow()
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
// At the moment at least, we don't have a root frame before the initial
// reflow; it's safe to just ignore the request in that case
if (!rootFrame)
return;
FrameNeedsReflow(rootFrame, eStyleChange, NS_FRAME_IS_DIRTY);
}
nsIFrame*
nsIPresShell::GetRootFrameExternal() const
{
return FrameManager()->GetRootFrame();
}
nsIFrame*
nsIPresShell::GetRootScrollFrame() const
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
// Ensure root frame is a viewport frame
if (!rootFrame || nsGkAtoms::viewportFrame != rootFrame->GetType())
return nsnull;
nsIFrame* theFrame = rootFrame->GetFirstPrincipalChild();
if (!theFrame || nsGkAtoms::scrollFrame != theFrame->GetType())
return nsnull;
return theFrame;
}
nsIScrollableFrame*
nsIPresShell::GetRootScrollFrameAsScrollable() const
{
nsIFrame* frame = GetRootScrollFrame();
if (!frame)
return nsnull;
nsIScrollableFrame* scrollableFrame = do_QueryFrame(frame);
NS_ASSERTION(scrollableFrame,
"All scroll frames must implement nsIScrollableFrame");
return scrollableFrame;
}
nsIScrollableFrame*
nsIPresShell::GetRootScrollFrameAsScrollableExternal() const
{
return GetRootScrollFrameAsScrollable();
}
nsIPageSequenceFrame*
PresShell::GetPageSequenceFrame() const
{
nsIFrame* frame = mFrameConstructor->GetPageSequenceFrame();
return do_QueryFrame(frame);
}
nsIFrame*
PresShell::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt)
{
return nsLayoutUtils::GetFrameForPoint(aFrame, aPt);
}
void
PresShell::BeginUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
mUpdateCount++;
#endif
mFrameConstructor->BeginUpdate();
if (aUpdateType & UPDATE_STYLE)
mStyleSet->BeginUpdate();
}
void
PresShell::EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's");
--mUpdateCount;
#endif
if (aUpdateType & UPDATE_STYLE) {
mStyleSet->EndUpdate();
if (mStylesHaveChanged)
ReconstructStyleData();
}
mFrameConstructor->EndUpdate();
}
void
PresShell::RestoreRootScrollPosition()
{
// Restore frame state for the root scroll frame
nsCOMPtr<nsILayoutHistoryState> historyState =
mDocument->GetLayoutHistoryState();
// Make sure we don't reenter reflow via the sync paint that happens while
// we're scrolling to our restored position. Entering reflow for the
// scrollable frame will cause it to reenter ScrollToRestoredPosition(), and
// it'll get all confused.
nsAutoScriptBlocker scriptBlocker;
++mChangeNestCount;
if (historyState) {
nsIFrame* scrollFrame = GetRootScrollFrame();
if (scrollFrame) {
nsIScrollableFrame* scrollableFrame = do_QueryFrame(scrollFrame);
if (scrollableFrame) {
FrameManager()->RestoreFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
scrollableFrame->ScrollToRestoredPosition();
}
}
}
--mChangeNestCount;
}
void
PresShell::BeginLoad(nsIDocument *aDocument)
{
mDocumentLoading = true;
}
void
PresShell::EndLoad(nsIDocument *aDocument)
{
NS_PRECONDITION(aDocument == mDocument, "Wrong document");
RestoreRootScrollPosition();
mDocumentLoading = false;
}
#ifdef DEBUG
void
PresShell::VerifyHasDirtyRootAncestor(nsIFrame* aFrame)
{
// XXXbz due to bug 372769, can't actually assert anything here...
return;
// XXXbz shouldn't need this part; remove it once FrameNeedsReflow
// handles the root frame correctly.
if (!aFrame->GetParent()) {
return;
}
// Make sure that there is a reflow root ancestor of |aFrame| that's
// in mDirtyRoots already.
while (aFrame && (aFrame->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN)) {
if (((aFrame->GetStateBits() & NS_FRAME_REFLOW_ROOT) ||
!aFrame->GetParent()) &&
mDirtyRoots.Contains(aFrame)) {
return;
}
aFrame = aFrame->GetParent();
}
NS_NOTREACHED("Frame has dirty bits set but isn't scheduled to be "
"reflowed?");
}
#endif
void
PresShell::FrameNeedsReflow(nsIFrame *aFrame, IntrinsicDirty aIntrinsicDirty,
nsFrameState aBitToAdd)
{
#ifdef NS_FUNCTION_TIMER
NS_TIME_FUNCTION_DECLARE_DOCURL;
nsCAutoString frameType__("N/A");
nsIAtom *atomType__ = aFrame ? aFrame->GetType() : nsnull;
if (atomType__) atomType__->ToUTF8String(frameType__);
NS_TIME_FUNCTION_MIN_FMT(1.0, "%s (line %d) (document: %s, frame type: %s)", MOZ_FUNCTION_NAME,
__LINE__, docURL__.get(), frameType__.get());
#endif
NS_PRECONDITION(aBitToAdd == NS_FRAME_IS_DIRTY ||
aBitToAdd == NS_FRAME_HAS_DIRTY_CHILDREN,
"Unexpected bits being added");
NS_PRECONDITION(aIntrinsicDirty != eStyleChange ||
aBitToAdd == NS_FRAME_IS_DIRTY,
"bits don't correspond to style change reason");
NS_ASSERTION(!mIsReflowing, "can't mark frame dirty during reflow");
// If we've not yet done the initial reflow, then don't bother
// enqueuing a reflow command yet.
if (! mDidInitialReflow)
return;
// If we're already destroying, don't bother with this either.
if (mIsDestroying)
return;
#ifdef DEBUG
//printf("gShellCounter: %d\n", gShellCounter++);
if (mInVerifyReflow)
return;
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\nPresShell@%p: frame %p needs reflow\n", (void*)this, (void*)aFrame);
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf("Current content model:\n");
Element *rootElement = mDocument->GetRootElement();
if (rootElement) {
rootElement->List(stdout, 0);
}
}
}
#endif
nsAutoTArray<nsIFrame*, 4> subtrees;
subtrees.AppendElement(aFrame);
do {
nsIFrame *subtreeRoot = subtrees.ElementAt(subtrees.Length() - 1);
subtrees.RemoveElementAt(subtrees.Length() - 1);
// Grab |wasDirty| now so we can go ahead and update the bits on
// subtreeRoot.
bool wasDirty = NS_SUBTREE_DIRTY(subtreeRoot);
subtreeRoot->AddStateBits(aBitToAdd);
// Now if subtreeRoot is a reflow root we can cut off this reflow at it if
// the bit being added is NS_FRAME_HAS_DIRTY_CHILDREN.
bool targetFrameDirty = (aBitToAdd == NS_FRAME_IS_DIRTY);
#define FRAME_IS_REFLOW_ROOT(_f) \
((_f->GetStateBits() & NS_FRAME_REFLOW_ROOT) && \
(_f != subtreeRoot || !targetFrameDirty))
// Mark the intrinsic widths as dirty on the frame, all of its ancestors,
// and all of its descendants, if needed:
if (aIntrinsicDirty != eResize) {
// Mark argument and all ancestors dirty. (Unless we hit a reflow
// root that should contain the reflow. That root could be
// subtreeRoot itself if it's not dirty, or it could be some
// ancestor of subtreeRoot.)
for (nsIFrame *a = subtreeRoot;
a && !FRAME_IS_REFLOW_ROOT(a);
a = a->GetParent())
a->MarkIntrinsicWidthsDirty();
}
if (aIntrinsicDirty == eStyleChange) {
// Mark all descendants dirty (using an nsTArray stack rather than
// recursion).
nsAutoTArray<nsIFrame*, 32> stack;
stack.AppendElement(subtreeRoot);
do {
nsIFrame *f = stack.ElementAt(stack.Length() - 1);
stack.RemoveElementAt(stack.Length() - 1);
if (f->GetType() == nsGkAtoms::placeholderFrame) {
nsIFrame *oof = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
if (!nsLayoutUtils::IsProperAncestorFrame(subtreeRoot, oof)) {
// We have another distinct subtree we need to mark.
subtrees.AppendElement(oof);
}
}
nsIFrame::ChildListIterator lists(f);
for (; !lists.IsDone(); lists.Next()) {
nsFrameList::Enumerator childFrames(lists.CurrentList());
for (; !childFrames.AtEnd(); childFrames.Next()) {
nsIFrame* kid = childFrames.get();
kid->MarkIntrinsicWidthsDirty();
stack.AppendElement(kid);
}
}
} while (stack.Length() != 0);
}
// Set NS_FRAME_HAS_DIRTY_CHILDREN bits (via nsIFrame::ChildIsDirty)
// up the tree until we reach either a frame that's already dirty or
// a reflow root.
nsIFrame *f = subtreeRoot;
for (;;) {
if (FRAME_IS_REFLOW_ROOT(f) || !f->GetParent()) {
// we've hit a reflow root or the root frame
if (!wasDirty) {
mDirtyRoots.AppendElement(f);
mDocument->SetNeedLayoutFlush();
}
#ifdef DEBUG
else {
VerifyHasDirtyRootAncestor(f);
}
#endif
break;
}
nsIFrame *child = f;
f = f->GetParent();
wasDirty = NS_SUBTREE_DIRTY(f);
f->ChildIsDirty(child);
NS_ASSERTION(f->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN,
"ChildIsDirty didn't do its job");
if (wasDirty) {
// This frame was already marked dirty.
#ifdef DEBUG
VerifyHasDirtyRootAncestor(f);
#endif
break;
}
}
} while (subtrees.Length() != 0);
MaybeScheduleReflow();
}
void
PresShell::FrameNeedsToContinueReflow(nsIFrame *aFrame)
{
NS_ASSERTION(mIsReflowing, "Must be in reflow when marking path dirty.");
NS_PRECONDITION(mCurrentReflowRoot, "Must have a current reflow root here");
NS_ASSERTION(aFrame == mCurrentReflowRoot ||
nsLayoutUtils::IsProperAncestorFrame(mCurrentReflowRoot, aFrame),
"Frame passed in is not the descendant of mCurrentReflowRoot");
NS_ASSERTION(aFrame->GetStateBits() & NS_FRAME_IN_REFLOW,
"Frame passed in not in reflow?");
mFramesToDirty.PutEntry(aFrame);
}
nsIScrollableFrame*
nsIPresShell::GetFrameToScrollAsScrollable(
nsIPresShell::ScrollDirection aDirection)
{
nsIScrollableFrame* scrollFrame = nsnull;
nsCOMPtr<nsIContent> focusedContent;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm && mDocument) {
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(mDocument->GetWindow());
nsCOMPtr<nsIDOMElement> focusedElement;
fm->GetFocusedElementForWindow(window, false, nsnull, getter_AddRefs(focusedElement));
focusedContent = do_QueryInterface(focusedElement);
}
if (!focusedContent && mSelection) {
nsISelection* domSelection = mSelection->
GetSelection(nsISelectionController::SELECTION_NORMAL);
if (domSelection) {
nsCOMPtr<nsIDOMNode> focusedNode;
domSelection->GetFocusNode(getter_AddRefs(focusedNode));
focusedContent = do_QueryInterface(focusedNode);
}
}
if (focusedContent) {
nsIFrame* startFrame = focusedContent->GetPrimaryFrame();
if (startFrame) {
scrollFrame = startFrame->GetScrollTargetFrame();
if (scrollFrame) {
startFrame = scrollFrame->GetScrolledFrame();
}
if (aDirection == nsIPresShell::eEither) {
scrollFrame =
nsLayoutUtils::GetNearestScrollableFrame(startFrame);
} else {
scrollFrame =
nsLayoutUtils::GetNearestScrollableFrameForDirection(startFrame,
aDirection == eVertical ? nsLayoutUtils::eVertical :
nsLayoutUtils::eHorizontal);
}
}
}
if (!scrollFrame) {
scrollFrame = GetRootScrollFrameAsScrollable();
}
return scrollFrame;
}
void
PresShell::CancelAllPendingReflows()
{
mDirtyRoots.Clear();
if (mReflowScheduled) {
GetPresContext()->RefreshDriver()->RemoveLayoutFlushObserver(this);
mReflowScheduled = false;
}
ASSERT_REFLOW_SCHEDULED_STATE();
}
nsresult
PresShell::RecreateFramesFor(nsIContent* aContent)
{
NS_TIME_FUNCTION_MIN(1.0);
NS_ENSURE_TRUE(mPresContext, NS_ERROR_FAILURE);
if (!mDidInitialReflow) {
// Nothing to do here. In fact, if we proceed and aContent is the
// root we will crash.
return NS_OK;
}
// Don't call RecreateFramesForContent since that is not exported and we want
// to keep the number of entrypoints down.
NS_ASSERTION(mViewManager, "Should have view manager");
// Have to make sure that the content notifications are flushed before we
// start messing with the frame model; otherwise we can get content doubling.
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
nsAutoScriptBlocker scriptBlocker;
nsStyleChangeList changeList;
changeList.AppendChange(nsnull, aContent, nsChangeHint_ReconstructFrame);
// Mark ourselves as not safe to flush while we're doing frame construction.
++mChangeNestCount;
nsresult rv = mFrameConstructor->ProcessRestyledFrames(changeList);
--mChangeNestCount;
return rv;
}
void
nsIPresShell::PostRecreateFramesFor(Element* aElement)
{
FrameConstructor()->PostRestyleEvent(aElement, nsRestyleHint(0),
nsChangeHint_ReconstructFrame);
}
void
nsIPresShell::RestyleForAnimation(Element* aElement, nsRestyleHint aHint)
{
FrameConstructor()->PostAnimationRestyleEvent(aElement, aHint,
NS_STYLE_HINT_NONE);
}
void
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
mPresContext->EventStateManager()->ClearFrameRefs(aFrame);
nsWeakFrame* weakFrame = mWeakFrames;
while (weakFrame) {
nsWeakFrame* prev = weakFrame->GetPreviousWeakFrame();
if (weakFrame->GetFrame() == aFrame) {
// This removes weakFrame from mWeakFrames.
weakFrame->Clear(this);
}
weakFrame = prev;
}
}
already_AddRefed<nsRenderingContext>
PresShell::GetReferenceRenderingContext()
{
NS_TIME_FUNCTION_MIN(1.0);
nsDeviceContext* devCtx = mPresContext->DeviceContext();
nsRefPtr<nsRenderingContext> rc;
if (mPresContext->IsScreen()) {
rc = new nsRenderingContext();
rc->Init(devCtx, gfxPlatform::GetPlatform()->ScreenReferenceSurface());
} else {
devCtx->CreateRenderingContext(*getter_AddRefs(rc));
}
return rc.forget();
}
nsresult
PresShell::GoToAnchor(const nsAString& aAnchorName, bool aScroll)
{
if (!mDocument) {
return NS_ERROR_FAILURE;
}
// Hold a reference to the ESM in case event dispatch tears us down.
nsRefPtr<nsEventStateManager> esm = mPresContext->EventStateManager();
if (aAnchorName.IsEmpty()) {
NS_ASSERTION(!aScroll, "can't scroll to empty anchor name");
esm->SetContentState(nsnull, NS_EVENT_STATE_URLTARGET);
return NS_OK;
}
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
// Search for an element with a matching "id" attribute
if (mDocument) {
content = mDocument->GetElementById(aAnchorName);
}
// Search for an anchor element with a matching "name" attribute
if (!content && htmlDoc) {
nsCOMPtr<nsIDOMNodeList> list;
// Find a matching list of named nodes
rv = htmlDoc->GetElementsByName(aAnchorName, getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; true; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Ensure it's an anchor element
content = do_QueryInterface(node);
if (content) {
if (content->Tag() == nsGkAtoms::a && content->IsHTML()) {
break;
}
content = nsnull;
}
}
}
}
// Search for anchor in the HTML namespace with a matching name
if (!content && !htmlDoc)
{
nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(mDocument);
nsCOMPtr<nsIDOMNodeList> list;
NS_NAMED_LITERAL_STRING(nameSpace, "http://www.w3.org/1999/xhtml");
// Get the list of anchor elements
rv = doc->GetElementsByTagNameNS(nameSpace, NS_LITERAL_STRING("a"), getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; true; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Compare the name attribute
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
nsAutoString value;
if (element && NS_SUCCEEDED(element->GetAttribute(NS_LITERAL_STRING("name"), value))) {
if (value.Equals(aAnchorName)) {
content = do_QueryInterface(element);
break;
}
}
}
}
}
esm->SetContentState(content, NS_EVENT_STATE_URLTARGET);
#ifdef ACCESSIBILITY
nsIContent *anchorTarget = content;
#endif
if (content) {
if (aScroll) {
rv = ScrollContentIntoView(content, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE,
ANCHOR_SCROLL_FLAGS);
NS_ENSURE_SUCCESS(rv, rv);
nsIScrollableFrame* rootScroll = GetRootScrollFrameAsScrollable();
if (rootScroll) {
mLastAnchorScrolledTo = content;
mLastAnchorScrollPositionY = rootScroll->GetScrollPosition().y;
}
}
// Should we select the target? This action is controlled by a
// preference: the default is to not select.
bool selectAnchor = Preferences::GetBool("layout.selectanchor");
// Even if select anchor pref is false, we must still move the
// caret there. That way tabbing will start from the new
// location
nsRefPtr<nsIDOMRange> jumpToRange = new nsRange();
while (content && content->GetFirstChild()) {
content = content->GetFirstChild();
}
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(content));
NS_ASSERTION(node, "No nsIDOMNode for descendant of anchor");
jumpToRange->SelectNodeContents(node);
// Select the anchor
nsISelection* sel = mSelection->
GetSelection(nsISelectionController::SELECTION_NORMAL);
if (sel) {
sel->RemoveAllRanges();
sel->AddRange(jumpToRange);
if (!selectAnchor) {
// Use a caret (collapsed selection) at the start of the anchor
sel->CollapseToStart();
}
}
// Selection is at anchor.
// Now focus the document itself if focus is on an element within it.
nsPIDOMWindow *win = mDocument->GetWindow();
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm && win) {
nsCOMPtr<nsIDOMWindow> focusedWindow;
fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
if (SameCOMIdentity(win, focusedWindow)) {
fm->ClearFocus(focusedWindow);
}
}
} else {
rv = NS_ERROR_FAILURE;
NS_NAMED_LITERAL_STRING(top, "top");
if (nsContentUtils::EqualsIgnoreASCIICase(aAnchorName, top)) {
// Scroll to the top/left if aAnchorName is "top" and there is no element
// with such a name or id.
rv = NS_OK;
nsIScrollableFrame* sf = GetRootScrollFrameAsScrollable();
// Check |aScroll| after setting |rv| so we set |rv| to the same
// thing whether or not |aScroll| is true.
if (aScroll && sf) {
// Scroll to the top of the page
sf->ScrollTo(nsPoint(0, 0), nsIScrollableFrame::INSTANT);
}
}
}
#ifdef ACCESSIBILITY
if (anchorTarget) {
nsAccessibilityService* accService = AccService();
if (accService)
accService->NotifyOfAnchorJumpTo(anchorTarget);
}
#endif
return rv;
}
nsresult
PresShell::ScrollToAnchor()
{
if (!mLastAnchorScrolledTo)
return NS_OK;
NS_ASSERTION(mDidInitialReflow, "should have done initial reflow by now");
nsIScrollableFrame* rootScroll = GetRootScrollFrameAsScrollable();
if (!rootScroll ||
mLastAnchorScrollPositionY != rootScroll->GetScrollPosition().y)
return NS_OK;
nsresult rv = ScrollContentIntoView(mLastAnchorScrolledTo, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE,
ANCHOR_SCROLL_FLAGS);
mLastAnchorScrolledTo = nsnull;
return rv;
}
/*
* Helper (per-continuation) for ScrollContentIntoView.
*
* @param aContainerFrame [in] the frame which aRect is relative to
* @param aFrame [in] Frame whose bounds should be unioned
* @param aUseWholeLineHeightForInlines [in] if true, then for inline frames
* we should include the top of the line in the added rectangle
* @param aRect [inout] rect into which its bounds should be unioned
* @param aHaveRect [inout] whether aRect contains data yet
* @param aPrevBlock [inout] the block aLines is a line iterator for
* @param aLines [inout] the line iterator we're using
* @param aCurLine [inout] the line to start looking from in this iterator
*/
static void
AccumulateFrameBounds(nsIFrame* aContainerFrame,
nsIFrame* aFrame,
bool aUseWholeLineHeightForInlines,
nsRect& aRect,
bool& aHaveRect,
nsIFrame*& aPrevBlock,
nsAutoLineIterator& aLines,
PRInt32& aCurLine)
{
nsRect frameBounds = aFrame->GetRect() +
aFrame->GetParent()->GetOffsetTo(aContainerFrame);
// If this is an inline frame and either the bounds height is 0 (quirks
// layout model) or aUseWholeLineHeightForInlines is set, we need to
// change the top of the bounds to include the whole line.
if (frameBounds.height == 0 || aUseWholeLineHeightForInlines) {
nsIAtom* frameType = NULL;
nsIFrame *prevFrame = aFrame;
nsIFrame *f = aFrame;
while (f &&
(frameType = f->GetType()) == nsGkAtoms::inlineFrame) {
prevFrame = f;
f = prevFrame->GetParent();
}
if (f != aFrame &&
f &&
frameType == nsGkAtoms::blockFrame) {
// find the line containing aFrame and increase the top of |offset|.
if (f != aPrevBlock) {
aLines = f->GetLineIterator();
aPrevBlock = f;
aCurLine = 0;
}
if (aLines) {
PRInt32 index = aLines->FindLineContaining(prevFrame, aCurLine);
if (index >= 0) {
aCurLine = index;
nsIFrame *trash1;
PRInt32 trash2;
nsRect lineBounds;
PRUint32 trash3;
if (NS_SUCCEEDED(aLines->GetLine(index, &trash1, &trash2,
lineBounds, &trash3))) {
lineBounds += f->GetOffsetTo(aContainerFrame);
if (lineBounds.y < frameBounds.y) {
frameBounds.height = frameBounds.YMost() - lineBounds.y;
frameBounds.y = lineBounds.y;
}
}
}
}
}
}
if (aHaveRect) {
// We can't use nsRect::UnionRect since it drops empty rects on
// the floor, and we need to include them. (Thus we need
// aHaveRect to know when to drop the initial value on the floor.)
aRect.UnionRectEdges(aRect, frameBounds);
} else {
aHaveRect = true;
aRect = frameBounds;
}
}
/**
* This function takes a scrollable frame, a rect in the coordinate system
* of the scrolled frame, and a desired percentage-based scroll
* position and attempts to scroll the rect to that position in the
* scrollport.
*
* This needs to work even if aRect has a width or height of zero.
*/
static void ScrollToShowRect(nsIScrollableFrame* aScrollFrame,
const nsRect& aRect,
PRIntn aVPercent,
PRIntn aHPercent,
PRUint32 aFlags)
{
nsPoint scrollPt = aScrollFrame->GetScrollPosition();
nsRect visibleRect(scrollPt, aScrollFrame->GetScrollPortRect().Size());
nsSize lineSize = aScrollFrame->GetLineScrollAmount();
nsPresContext::ScrollbarStyles ss = aScrollFrame->GetScrollbarStyles();
if ((aFlags & nsIPresShell::SCROLL_OVERFLOW_HIDDEN) ||
ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN) {
// See how the rect should be positioned vertically
if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent ||
(NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent &&
aRect.height < lineSize.height)) {
// The caller doesn't care where the frame is positioned vertically,
// so long as it's fully visible
if (aRect.y < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollPt.y = aRect.y;
} else if (aRect.YMost() > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollPt.y += aRect.YMost() - visibleRect.YMost();
if (scrollPt.y > aRect.y) {
scrollPt.y = aRect.y;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) {
// Scroll only if no part of the frame is visible in this view
if (aRect.YMost() - lineSize.height < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollPt.y = aRect.y;
} else if (aRect.y + lineSize.height > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollPt.y += aRect.YMost() - visibleRect.YMost();
if (scrollPt.y > aRect.y) {
scrollPt.y = aRect.y;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignY =
NSToCoordRound(aRect.y + aRect.height * (aVPercent / 100.0f));
scrollPt.y =
NSToCoordRound(frameAlignY - visibleRect.height * (aVPercent / 100.0f));
}
}
if ((aFlags & nsIPresShell::SCROLL_OVERFLOW_HIDDEN) ||
ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN) {
// See how the frame should be positioned horizontally
if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent ||
(NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent &&
aRect.width < lineSize.width)) {
// The caller doesn't care where the frame is positioned horizontally,
// so long as it's fully visible
if (aRect.x < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollPt.x = aRect.x;
} else if (aRect.XMost() > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollPt.x += aRect.XMost() - visibleRect.XMost();
if (scrollPt.x > aRect.x) {
scrollPt.x = aRect.x;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) {
// Scroll only if no part of the frame is visible in this view
if (aRect.XMost() - lineSize.width < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollPt.x = aRect.x;
} else if (aRect.x + lineSize.width > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollPt.x += aRect.XMost() - visibleRect.XMost();
if (scrollPt.x > aRect.x) {
scrollPt.x = aRect.x;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignX =
NSToCoordRound(aRect.x + (aRect.width) * (aHPercent / 100.0f));
scrollPt.x =
NSToCoordRound(frameAlignX - visibleRect.width * (aHPercent / 100.0f));
}
}
aScrollFrame->ScrollTo(scrollPt, nsIScrollableFrame::INSTANT);
}
nsresult
PresShell::ScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent,
PRUint32 aFlags)
{
nsCOMPtr<nsIContent> content = aContent; // Keep content alive while flushing.
NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDocument> currentDoc = content->GetCurrentDoc();
NS_ENSURE_STATE(currentDoc);
NS_ASSERTION(mDidInitialReflow, "should have done initial reflow by now");
mContentToScrollTo = aContent;
mContentScrollVPosition = aVPercent;
mContentScrollHPosition = aHPercent;
mContentToScrollToFlags = aFlags;
// Flush layout and attempt to scroll in the process.
currentDoc->SetNeedLayoutFlush();
currentDoc->FlushPendingNotifications(Flush_InterruptibleLayout);
// If mContentToScrollTo is non-null, that means we interrupted the reflow
// (or suppressed it altogether because we're suppressing interruptible
// flushes right now) and won't necessarily get the position correct, but do
// a best-effort scroll here. The other option would be to do this inside
// FlushPendingNotifications, but I'm not sure the repeated scrolling that
// could trigger if reflows keep getting interrupted would be more desirable
// than a single best-effort scroll followed by one final scroll on the first
// completed reflow.
if (mContentToScrollTo) {
DoScrollContentIntoView(content, aVPercent, aHPercent, aFlags);
}
return NS_OK;
}
void
PresShell::DoScrollContentIntoView(nsIContent* aContent,
PRIntn aVPercent,
PRIntn aHPercent,
PRUint32 aFlags)
{
NS_ASSERTION(mDidInitialReflow, "should have done initial reflow by now");
nsIFrame* frame = aContent->GetPrimaryFrame();
if (!frame) {
mContentToScrollTo = nsnull;
return;
}
if (frame->GetStateBits() & NS_FRAME_FIRST_REFLOW) {
// The reflow flush before this scroll got interrupted, and this frame's
// coords and size are all zero, and it has no content showing anyway.
// Don't bother scrolling to it. We'll try again when we finish up layout.
return;
}
nsIFrame* container =
nsLayoutUtils::GetClosestFrameOfType(frame, nsGkAtoms::scrollFrame);
if (!container) {
// nothing can be scrolled
return;
}
// This is a two-step process.
// Step 1: Find the bounds of the rect we want to scroll into view. For
// example, for an inline frame we may want to scroll in the whole
// line, or we may want to scroll multiple lines into view.
// Step 2: Walk container frame and its ancestors and scroll them
// appropriately.
// frameBounds is relative to container. We're assuming
// that scrollframes don't split so every continuation of frame will
// be a descendant of container. (Things would still mostly work
// even if that assumption was false.)
nsRect frameBounds;
bool haveRect = false;
bool useWholeLineHeightForInlines = aVPercent != NS_PRESSHELL_SCROLL_ANYWHERE;
// Reuse the same line iterator across calls to AccumulateFrameBounds. We set
// it every time we detect a new block (stored in prevBlock).
nsIFrame* prevBlock = nsnull;
nsAutoLineIterator lines;
// The last line we found a continuation on in |lines|. We assume that later
// continuations cannot come on earlier lines.
PRInt32 curLine = 0;
do {
AccumulateFrameBounds(container, frame, useWholeLineHeightForInlines,
frameBounds, haveRect, prevBlock, lines, curLine);
} while ((frame = frame->GetNextContinuation()));
ScrollFrameRectIntoView(container, frameBounds, aVPercent, aHPercent,
aFlags);
}
bool
PresShell::ScrollFrameRectIntoView(nsIFrame* aFrame,
const nsRect& aRect,
PRIntn aVPercent,
PRIntn aHPercent,
PRUint32 aFlags)
{
bool didScroll = false;
// This function needs to work even if rect has a width or height of 0.
nsRect rect = aRect;
nsIFrame* container = aFrame;
// Walk up the frame hierarchy scrolling the rect into view and
// keeping rect relative to container
do {
nsIScrollableFrame* sf = do_QueryFrame(container);
if (sf) {
nsPoint oldPosition = sf->GetScrollPosition();
ScrollToShowRect(sf, rect - sf->GetScrolledFrame()->GetPosition(),
aVPercent, aHPercent, aFlags);
nsPoint newPosition = sf->GetScrollPosition();
// If the scroll position increased, that means our content moved up,
// so our rect's offset should decrease
rect += oldPosition - newPosition;
if (oldPosition != newPosition) {
didScroll = true;
}
// only scroll one container when this flag is set
if (aFlags & nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY) {
break;
}
}
rect += container->GetPosition();
nsIFrame* parent = container->GetParent();
if (!parent && !(aFlags & nsIPresShell::SCROLL_NO_PARENT_FRAMES)) {
nsPoint extraOffset(0,0);
parent = nsLayoutUtils::GetCrossDocParentFrame(container, &extraOffset);
if (parent) {
PRInt32 APD = container->PresContext()->AppUnitsPerDevPixel();
PRInt32 parentAPD = parent->PresContext()->AppUnitsPerDevPixel();
rect = rect.ConvertAppUnitsRoundOut(APD, parentAPD);
rect += extraOffset;
}
}
container = parent;
} while (container);
return didScroll;
}
nsRectVisibility
PresShell::GetRectVisibility(nsIFrame* aFrame,
const nsRect &aRect,
nscoord aMinTwips) const
{
NS_ASSERTION(aFrame->PresContext() == GetPresContext(),
"prescontext mismatch?");
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
NS_ASSERTION(rootFrame,
"How can someone have a frame for this presshell when there's no root?");
nsIScrollableFrame* sf = GetRootScrollFrameAsScrollable();
nsRect scrollPortRect;
if (sf) {
scrollPortRect = sf->GetScrollPortRect();
nsIFrame* f = do_QueryFrame(sf);
scrollPortRect += f->GetOffsetTo(rootFrame);
} else {
scrollPortRect = nsRect(nsPoint(0,0), rootFrame->GetSize());
}
nsRect r = aRect + aFrame->GetOffsetTo(rootFrame);
// If aRect is entirely visible then we don't need to ensure that
// at least aMinTwips of it is visible
if (scrollPortRect.Contains(r))
return nsRectVisibility_kVisible;
nsRect insetRect = scrollPortRect;
insetRect.Deflate(aMinTwips, aMinTwips);
if (r.YMost() <= insetRect.y)
return nsRectVisibility_kAboveViewport;
if (r.y >= insetRect.YMost())
return nsRectVisibility_kBelowViewport;
if (r.XMost() <= insetRect.x)
return nsRectVisibility_kLeftOfViewport;
if (r.x >= insetRect.XMost())
return nsRectVisibility_kRightOfViewport;
return nsRectVisibility_kVisible;
}
// GetLinkLocation: copy link location to clipboard
nsresult PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString) const
{
#ifdef DEBUG_dr
printf("dr :: PresShell::GetLinkLocation\n");
#endif
NS_ENSURE_ARG_POINTER(aNode);
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
if (content) {
nsCOMPtr<nsIURI> hrefURI = content->GetHrefURI();
if (hrefURI) {
nsCAutoString specUTF8;
nsresult rv = hrefURI->GetSpec(specUTF8);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString anchorText;
CopyUTF8toUTF16(specUTF8, anchorText);
// Remove all the '\t', '\r' and '\n' from 'anchorText'
static const char strippedChars[] = "\t\r\n";
anchorText.StripChars(strippedChars);
aLocationString = anchorText;
return NS_OK;
}
}
// if no link, fail.
return NS_ERROR_FAILURE;
}
void
PresShell::ScheduleViewManagerFlush()
{
nsPresContext* presContext = GetPresContext();
if (presContext) {
presContext->RefreshDriver()->ScheduleViewManagerFlush();
}
if (mDocument) {
mDocument->SetNeedLayoutFlush();
}
}
void
PresShell::DispatchSynthMouseMove(nsGUIEvent *aEvent,
bool aFlushOnHoverChange)
{
PRUint32 hoverGenerationBefore = mFrameConstructor->GetHoverGeneration();
nsEventStatus status;
nsIView* targetView = nsIView::GetViewFor(aEvent->widget);
targetView->GetViewManager()->DispatchEvent(aEvent, targetView, &status);
if (aFlushOnHoverChange &&
hoverGenerationBefore != mFrameConstructor->GetHoverGeneration()) {
// Flush so that the resulting reflow happens now so that our caller
// can suppress any synthesized mouse moves caused by that reflow.
FlushPendingNotifications(Flush_Layout);
}
}
void
PresShell::ClearMouseCaptureOnView(nsIView* aView)
{
if (gCaptureInfo.mContent) {
if (aView) {
// if a view was specified, ensure that the captured content is within
// this view.
nsIFrame* frame = gCaptureInfo.mContent->GetPrimaryFrame();
if (frame) {
nsIView* view = frame->GetClosestView();
// if there is no view, capturing won't be handled any more, so
// just release the capture.
if (view) {
do {
if (view == aView) {
NS_RELEASE(gCaptureInfo.mContent);
// the view containing the captured content likely disappeared so
// disable capture for now.
gCaptureInfo.mAllowed = false;
break;
}
view = view->GetParent();
} while (view);
// return if the view wasn't found
return;
}
}
}
NS_RELEASE(gCaptureInfo.mContent);
}
// disable mouse capture until the next mousedown as a dialog has opened
// or a drag has started. Otherwise, someone could start capture during
// the modal dialog or drag.
gCaptureInfo.mAllowed = false;
}
void
nsIPresShell::ClearMouseCapture(nsIFrame* aFrame)
{
if (!gCaptureInfo.mContent) {
gCaptureInfo.mAllowed = false;
return;
}
// null frame argument means clear the capture
if (!aFrame) {
NS_RELEASE(gCaptureInfo.mContent);
gCaptureInfo.mAllowed = false;
return;
}
nsIFrame* capturingFrame = gCaptureInfo.mContent->GetPrimaryFrame();
if (!capturingFrame) {
NS_RELEASE(gCaptureInfo.mContent);
gCaptureInfo.mAllowed = false;
return;
}
if (nsLayoutUtils::IsAncestorFrameCrossDoc(aFrame, capturingFrame)) {
NS_RELEASE(gCaptureInfo.mContent);
gCaptureInfo.mAllowed = false;
}
}
nsresult
PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, bool aLeavingPage)
{
NS_TIME_FUNCTION_MIN(1.0);
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
// We actually have to mess with the docshell here, since we want to
// store the state back in it.
// XXXbz this isn't really right, since this is being called in the
// content viewer's Hide() method... by that point the docshell's
// state could be wrong. We should sort out a better ownership
// model for the layout history state.
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (!docShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsILayoutHistoryState> historyState;
docShell->GetLayoutHistoryState(getter_AddRefs(historyState));
if (!historyState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState));
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
docShell->SetLayoutHistoryState(historyState);
}
*aState = historyState;
NS_IF_ADDREF(*aState);
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame) return NS_OK;
// Capture frame state for the root scroll frame
// Don't capture state when first creating doc element hierarchy
// As the scroll position is 0 and this will cause us to lose
// our previously saved place!
if (aLeavingPage) {
nsIFrame* scrollFrame = GetRootScrollFrame();
if (scrollFrame) {
FrameManager()->CaptureFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
}
}
FrameManager()->CaptureFrameState(rootFrame, historyState);
return NS_OK;
}
void
PresShell::UnsuppressAndInvalidate()
{
// Note: We ignore the EnsureVisible check for resource documents, because
// they won't have a docshell, so they'll always fail EnsureVisible.
if ((!mDocument->IsResourceDoc() && !mPresContext->EnsureVisible()) ||
mHaveShutDown) {
// No point; we're about to be torn down anyway.
return;
}
mPaintingSuppressed = false;
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
// let's assume that outline on a root frame is not supported
nsRect rect(nsPoint(0, 0), rootFrame->GetSize());
rootFrame->Invalidate(rect);
if (mCaretEnabled && mCaret) {
mCaret->CheckCaretDrawingState();
}
nsRootPresContext* rootPC = mPresContext->GetRootPresContext();
if (rootPC) {
rootPC->RequestUpdatePluginGeometry(rootFrame);
}
}
// now that painting is unsuppressed, focus may be set on the document
nsPIDOMWindow *win = mDocument->GetWindow();
if (win)
win->SetReadyForFocus();
if (!mHaveShutDown)
SynthesizeMouseMove(false);
}
void
PresShell::UnsuppressPainting()
{
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
if (mIsDocumentGone || !mPaintingSuppressed)
return;
// If we have reflows pending, just wait until we process
// the reflows and get all the frames where we want them
// before actually unlocking the painting. Otherwise
// go ahead and unlock now.
if (!mDirtyRoots.IsEmpty())
mShouldUnsuppressPainting = true;
else
UnsuppressAndInvalidate();
}
// Post a request to handle an arbitrary callback after reflow has finished.
nsresult
PresShell::PostReflowCallback(nsIReflowCallback* aCallback)
{
void* result = AllocateMisc(sizeof(nsCallbackEventRequest));
if (NS_UNLIKELY(!result)) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCallbackEventRequest* request = (nsCallbackEventRequest*)result;
request->callback = aCallback;
request->next = nsnull;
if (mLastCallbackEventRequest) {
mLastCallbackEventRequest = mLastCallbackEventRequest->next = request;
} else {
mFirstCallbackEventRequest = request;
mLastCallbackEventRequest = request;
}
return NS_OK;
}
void
PresShell::CancelReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* before = nsnull;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
if (callback == aCallback)
{
nsCallbackEventRequest* toFree = node;
if (node == mFirstCallbackEventRequest) {
node = node->next;
mFirstCallbackEventRequest = node;
NS_ASSERTION(before == nsnull, "impossible");
} else {
node = node->next;
before->next = node;
}
if (toFree == mLastCallbackEventRequest) {
mLastCallbackEventRequest = before;
}
FreeMisc(sizeof(nsCallbackEventRequest), toFree);
} else {
before = node;
node = node->next;
}
}
}
void
PresShell::CancelPostedReflowCallbacks()
{
while (mFirstCallbackEventRequest) {
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
mFirstCallbackEventRequest = node->next;
if (!mFirstCallbackEventRequest) {
mLastCallbackEventRequest = nsnull;
}
nsIReflowCallback* callback = node->callback;
FreeMisc(sizeof(nsCallbackEventRequest), node);
if (callback) {
callback->ReflowCallbackCanceled();
}
}
}
void
PresShell::HandlePostedReflowCallbacks(bool aInterruptible)
{
bool shouldFlush = false;
while (mFirstCallbackEventRequest) {
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
mFirstCallbackEventRequest = node->next;
if (!mFirstCallbackEventRequest) {
mLastCallbackEventRequest = nsnull;
}
nsIReflowCallback* callback = node->callback;
FreeMisc(sizeof(nsCallbackEventRequest), node);
if (callback) {
if (callback->ReflowFinished()) {
shouldFlush = true;
}
}
}
mozFlushType flushType =
aInterruptible ? Flush_InterruptibleLayout : Flush_Layout;
if (shouldFlush)
FlushPendingNotifications(flushType);
}
bool
PresShell::IsSafeToFlush() const
{
// Not safe if we are reflowing or in the middle of frame construction
bool isSafeToFlush = !mIsReflowing &&
!mChangeNestCount;
if (isSafeToFlush) {
// Not safe if we are painting
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
bool isPainting = false;
viewManager->IsPainting(isPainting);
if (isPainting) {
isSafeToFlush = false;
}
}
}
return isSafeToFlush;
}
void
PresShell::FlushPendingNotifications(mozFlushType aType)
{
/**
* VERY IMPORTANT: If you add some sort of new flushing to this
* method, make sure to add the relevant SetNeedLayoutFlush or
* SetNeedStyleFlush calls on the document.
*/
#ifdef NS_FUNCTION_TIMER
NS_TIME_FUNCTION_DECLARE_DOCURL;
static const char *flushTypeNames[] = {
"Flush_Content",
"Flush_ContentAndNotify",
"Flush_Styles",
"Flush_InterruptibleLayout",
"Flush_Layout",
"Flush_Display"
};
NS_TIME_FUNCTION_MIN_FMT(1.0, "%s (line %d) (document: %s, type: %s)", MOZ_FUNCTION_NAME,
__LINE__, docURL__.get(), flushTypeNames[aType - 1]);
#endif
SAMPLE_LABEL("layout", "FlushPendingNotifications");
#ifdef ACCESSIBILITY
#ifdef DEBUG
nsAccessibilityService* accService = GetAccService();
if (accService) {
NS_ASSERTION(!accService->IsProcessingRefreshDriverNotification(),
"Flush during accessible tree update!");
}
#endif
#endif
NS_ASSERTION(aType >= Flush_Frames, "Why did we get called?");
bool isSafeToFlush = IsSafeToFlush();
// If layout could possibly trigger scripts, then it's only safe to flush if
// it's safe to run script.
bool hasHadScriptObject;
if (mDocument->GetScriptHandlingObject(hasHadScriptObject) ||
hasHadScriptObject) {
isSafeToFlush = isSafeToFlush && nsContentUtils::IsSafeToRunScript();
}
NS_ASSERTION(!isSafeToFlush || mViewManager, "Must have view manager");
// Make sure the view manager stays alive.
nsCOMPtr<nsIViewManager> viewManagerDeathGrip = mViewManager;
if (isSafeToFlush && mViewManager) {
// Processing pending notifications can kill us, and some callers only
// hold weak refs when calling FlushPendingNotifications(). :(
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
if (mResizeEvent.IsPending()) {
FireResizeEvent();
if (mIsDestroying) {
return;
}
}
// We need to make sure external resource documents are flushed too (for
// example, svg filters that reference a filter in an external document
// need the frames in the external document to be constructed for the
// filter to work). We only need external resources to be flushed when the
// main document is flushing >= Flush_Frames, so we flush external
// resources here instead of nsDocument::FlushPendingNotifications.
mDocument->FlushExternalResources(aType);
// Force flushing of any pending content notifications that might have
// queued up while our event was pending. That will ensure that we don't
// construct frames for content right now that's still waiting to be
// notified on,
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
// Process pending restyles, since any flush of the presshell wants
// up-to-date style data.
if (!mIsDestroying) {
mViewManager->FlushDelayedResize(false);
mPresContext->FlushPendingMediaFeatureValuesChanged();
// Flush any pending update of the user font set, since that could
// cause style changes (for updating ex/ch units, and to cause a
// reflow).
mPresContext->FlushUserFontSet();
// Flush any requested SMIL samples.
if (mDocument->HasAnimationController()) {
mDocument->GetAnimationController()->FlushResampleRequests();
}
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->CreateNeededFrames();
mFrameConstructor->ProcessPendingRestyles();
}
// Dispatch any 'animationstart' events those (or earlier) restyles
// queued up.
if (!mIsDestroying) {
mPresContext->AnimationManager()->DispatchEvents();
}
// Process whatever XBL constructors those restyles queued up. This
// ensures that onload doesn't fire too early and that we won't do extra
// reflows after those constructors run.
if (!mIsDestroying) {
mDocument->BindingManager()->ProcessAttachedQueue();
}
// Now those constructors or events might have posted restyle
// events. At the same time, we still need up-to-date style data.
// In particular, reflow depends on style being completely up to
// date. If it's not, then style context reparenting, which can
// happen during reflow, might suddenly pick up the new rules and
// we'll end up with frames whose style doesn't match the frame
// type.
if (!mIsDestroying) {
nsAutoScriptBlocker scriptBlocker;
mFrameConstructor->CreateNeededFrames();
mFrameConstructor->ProcessPendingRestyles();
}
// There might be more pending constructors now, but we're not going to
// worry about them. They can't be triggered during reflow, so we should
// be good.
if (aType >= (mSuppressInterruptibleReflows ? Flush_Layout : Flush_InterruptibleLayout) &&
!mIsDestroying) {
mFrameConstructor->RecalcQuotesAndCounters();
mViewManager->FlushDelayedResize(true);
if (ProcessReflowCommands(aType < Flush_Layout) && mContentToScrollTo) {
// We didn't get interrupted. Go ahead and scroll to our content
DoScrollContentIntoView(mContentToScrollTo, mContentScrollVPosition,
mContentScrollHPosition,
mContentToScrollToFlags);
mContentToScrollTo = nsnull;
}
} else if (!mIsDestroying && mSuppressInterruptibleReflows &&
aType == Flush_InterruptibleLayout) {
// We suppressed this flush, but the document thinks it doesn't
// need to flush anymore. Let it know what's really going on.
mDocument->SetNeedLayoutFlush();
}
if (aType >= Flush_Layout) {
// Flush plugin geometry. Don't flush plugin geometry for
// interruptible layouts, since WillPaint does an interruptible
// layout.
nsRootPresContext* rootPresContext = mPresContext->GetRootPresContext();
if (rootPresContext) {
rootPresContext->UpdatePluginGeometry();
}
if (!mIsDestroying) {
mViewManager->UpdateWidgetGeometry();
}
}
}
}
void
PresShell::CharacterDataChanged(nsIDocument *aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected CharacterDataChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
nsAutoCauseReflowNotifier crNotifier(this);
if (mCaret) {
// Invalidate the caret's current location before we call into the frame
// constructor. It is important to do this now, and not wait until the
// resulting reflow, because this call causes continuation frames of the
// text frame the caret is in to forget what part of the content they
// refer to, making it hard for them to return the correct continuation
// frame to the caret.
mCaret->InvalidateOutsideCaret();
}
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
nsIContent *container = aContent->GetParent();
PRUint32 selectorFlags =
container ? (container->GetFlags() & NODE_ALL_SELECTOR_FLAGS) : 0;
if (selectorFlags != 0 && !aContent->IsRootOfAnonymousSubtree()) {
Element* element = container->AsElement();
if (aInfo->mAppend && !aContent->GetNextSibling())
mFrameConstructor->RestyleForAppend(element, aContent);
else
mFrameConstructor->RestyleForInsertOrChange(element, aContent);
}
mFrameConstructor->CharacterDataChanged(aContent, aInfo);
VERIFY_STYLE_TREE;
}
void
PresShell::ContentStateChanged(nsIDocument* aDocument,
nsIContent* aContent,
nsEventStates aStateMask)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentStateChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
if (mDidInitialReflow) {
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->ContentStateChanged(aContent, aStateMask);
VERIFY_STYLE_TREE;
}
}
void
PresShell::DocumentStatesChanged(nsIDocument* aDocument,
nsEventStates aStateMask)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected DocumentStatesChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
if (mDidInitialReflow &&
mStyleSet->HasDocumentStateDependentStyle(mPresContext,
mDocument->GetRootElement(),
aStateMask)) {
mFrameConstructor->PostRestyleEvent(mDocument->GetRootElement(),
eRestyle_Subtree, NS_STYLE_HINT_NONE);
VERIFY_STYLE_TREE;
}
if (aStateMask.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE)) {
nsIFrame* root = FrameManager()->GetRootFrame();
if (root) {
root->InvalidateFrameSubtree();
}
}
}
void
PresShell::AttributeWillChange(nsIDocument* aDocument,
Element* aElement,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected AttributeWillChange");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
// XXXwaterson it might be more elegant to wait until after the
// initial reflow to begin observing the document. That would
// squelch any other inappropriate notifications as well.
if (mDidInitialReflow) {
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->AttributeWillChange(aElement, aNameSpaceID,
aAttribute, aModType);
VERIFY_STYLE_TREE;
}
}
void
PresShell::AttributeChanged(nsIDocument* aDocument,
Element* aElement,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected AttributeChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
// XXXwaterson it might be more elegant to wait until after the
// initial reflow to begin observing the document. That would
// squelch any other inappropriate notifications as well.
if (mDidInitialReflow) {
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->AttributeChanged(aElement, aNameSpaceID,
aAttribute, aModType);
VERIFY_STYLE_TREE;
}
}
void
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
PRInt32 aNewIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentAppended");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRECONDITION(aContainer, "must have container");
if (!mDidInitialReflow) {
return;
}
nsAutoCauseReflowNotifier crNotifier(this);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
mFrameConstructor->RestyleForAppend(aContainer->AsElement(), aFirstNewContent);
mFrameConstructor->ContentAppended(aContainer, aFirstNewContent, true);
VERIFY_STYLE_TREE;
}
void
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentInserted");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
if (!mDidInitialReflow) {
return;
}
nsAutoCauseReflowNotifier crNotifier(this);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
if (aContainer)
mFrameConstructor->RestyleForInsertOrChange(aContainer->AsElement(), aChild);
mFrameConstructor->ContentInserted(aContainer, aChild, nsnull, true);
VERIFY_STYLE_TREE;
}
void
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsIContent* aPreviousSibling)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentRemoved");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
// Make sure that the caret doesn't leave a turd where the child used to be.
if (mCaret) {
mCaret->InvalidateOutsideCaret();
}
// Notify the ESM that the content has been removed, so that
// it can clean up any state related to the content.
mPresContext->EventStateManager()->ContentRemoved(aDocument, aChild);
nsAutoCauseReflowNotifier crNotifier(this);
// Call this here so it only happens for real content mutations and
// not cases when the frame constructor calls its own methods to force
// frame reconstruction.
nsIContent* oldNextSibling;
if (aContainer) {
oldNextSibling = aContainer->GetChildAt(aIndexInContainer);
} else {
oldNextSibling = nsnull;
}
if (aContainer)
mFrameConstructor->RestyleForRemove(aContainer->AsElement(), aChild,
oldNextSibling);
bool didReconstruct;
mFrameConstructor->ContentRemoved(aContainer, aChild, oldNextSibling,
nsCSSFrameConstructor::REMOVE_CONTENT,
&didReconstruct);
VERIFY_STYLE_TREE;
}
nsresult
PresShell::ReconstructFrames(void)
{
NS_PRECONDITION(!FrameManager()->GetRootFrame() || mDidInitialReflow,
"Must not have root frame before initial reflow");
if (!mDidInitialReflow) {
// Nothing to do here
return NS_OK;
}
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
// Have to make sure that the content notifications are flushed before we
// start messing with the frame model; otherwise we can get content doubling.
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
nsAutoCauseReflowNotifier crNotifier(this);
mFrameConstructor->BeginUpdate();
nsresult rv = mFrameConstructor->ReconstructDocElementHierarchy();
VERIFY_STYLE_TREE;
mFrameConstructor->EndUpdate();
return rv;
}
void
nsIPresShell::ReconstructStyleDataInternal()
{
mStylesHaveChanged = false;
if (mIsDestroying) {
// We don't want to mess with restyles at this point
return;
}
if (mPresContext) {
mPresContext->RebuildUserFontSet();
mPresContext->AnimationManager()->KeyframesListIsDirty();
}
Element* root = mDocument->GetRootElement();
if (!mDidInitialReflow) {
// Nothing to do here, since we have no frames yet
return;
}
if (!root) {
// No content to restyle
return;
}
mFrameConstructor->PostRestyleEvent(root, eRestyle_Subtree, NS_STYLE_HINT_NONE);
}
void
nsIPresShell::ReconstructStyleDataExternal()
{
ReconstructStyleDataInternal();
}
void
PresShell::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
bool aDocumentSheet)
{
// We only care when enabled sheets are added
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
if (aStyleSheet->IsApplicable() && aStyleSheet->HasRules()) {
mStylesHaveChanged = true;
}
}
void
PresShell::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
bool aDocumentSheet)
{
// We only care when enabled sheets are removed
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
if (aStyleSheet->IsApplicable() && aStyleSheet->HasRules()) {
mStylesHaveChanged = true;
}
}
void
PresShell::StyleSheetApplicableStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
bool aApplicable)
{
if (aStyleSheet->HasRules()) {
mStylesHaveChanged = true;
}
}
void
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule)
{
mStylesHaveChanged = true;
}
void
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = true;
}
void
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = true;
}
nsIFrame*
PresShell::GetRealPrimaryFrameFor(nsIContent* aContent) const
{
if (aContent->GetDocument() != GetDocument()) {
return nsnull;
}
nsIFrame *primaryFrame = aContent->GetPrimaryFrame();
if (!primaryFrame)
return nsnull;
return nsPlaceholderFrame::GetRealFrameFor(primaryFrame);
}
nsIFrame*
PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame) const
{
return FrameManager()->GetPlaceholderFrameFor(aFrame);
}
nsresult
PresShell::RenderDocument(const nsRect& aRect, PRUint32 aFlags,
nscolor aBackgroundColor,
gfxContext* aThebesContext)
{
NS_TIME_FUNCTION_WITH_DOCURL;
NS_ENSURE_TRUE(!(aFlags & RENDER_IS_UNTRUSTED), NS_ERROR_NOT_IMPLEMENTED);
nsRootPresContext* rootPresContext = mPresContext->GetRootPresContext();
if (rootPresContext) {
rootPresContext->FlushWillPaintObservers();
if (mIsDestroying)
return NS_OK;
}
nsAutoScriptBlocker blockScripts;
// Set up the rectangle as the path in aThebesContext
gfxRect r(0, 0,
nsPresContext::AppUnitsToFloatCSSPixels(aRect.width),
nsPresContext::AppUnitsToFloatCSSPixels(aRect.height));
aThebesContext->NewPath();
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
aThebesContext->Rectangle(r, true);
#else
aThebesContext->Rectangle(r);
#endif
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame) {
// Nothing to paint, just fill the rect
aThebesContext->SetColor(gfxRGBA(aBackgroundColor));
aThebesContext->Fill();
return NS_OK;
}
gfxContextAutoSaveRestore save(aThebesContext);
gfxContext::GraphicsOperator oldOperator = aThebesContext->CurrentOperator();
if (oldOperator == gfxContext::OPERATOR_OVER) {
// Clip to the destination rectangle before we push the group,
// to limit the size of the temporary surface
aThebesContext->Clip();
}
// we want the window to be composited as a single image using
// whatever operator was set; set OPERATOR_OVER here, which is
// either already the case, or overrides the operator in a group.
// the original operator will be present when we PopGroup.
// we can avoid using a temporary surface if we're using OPERATOR_OVER
// and our background color has no alpha (so we'll be compositing on top
// of a fully opaque solid color region)
bool needsGroup = NS_GET_A(aBackgroundColor) < 0xff ||
oldOperator != gfxContext::OPERATOR_OVER;
if (needsGroup) {
aThebesContext->PushGroup(NS_GET_A(aBackgroundColor) == 0xff ?
gfxASurface::CONTENT_COLOR :
gfxASurface::CONTENT_COLOR_ALPHA);
aThebesContext->Save();
if (oldOperator != gfxContext::OPERATOR_OVER) {
// Clip now while we paint to the temporary surface. For
// non-source-bounded operators (e.g., SOURCE), we need to do clip
// here after we've pushed the group, so that eventually popping
// the group and painting it will be able to clear the entire
// destination surface.
aThebesContext->Clip();
aThebesContext->SetOperator(gfxContext::OPERATOR_OVER);
}
}
aThebesContext->Translate(gfxPoint(-nsPresContext::AppUnitsToFloatCSSPixels(aRect.x),
-nsPresContext::AppUnitsToFloatCSSPixels(aRect.y)));
nsDeviceContext* devCtx = mPresContext->DeviceContext();
gfxFloat scale = gfxFloat(devCtx->AppUnitsPerDevPixel())/nsPresContext::AppUnitsPerCSSPixel();
aThebesContext->Scale(scale, scale);
// Since canvas APIs use floats to set up their matrices, we may have
// some slight inaccuracy here. Adjust matrix components that are
// integers up to the accuracy of floats to be those integers.
aThebesContext->NudgeCurrentMatrixToIntegers();
AutoSaveRestoreRenderingState _(this);
nsRefPtr<nsRenderingContext> rc = new nsRenderingContext();
rc->Init(devCtx, aThebesContext);
bool wouldFlushRetainedLayers = false;
PRUint32 flags = nsLayoutUtils::PAINT_IGNORE_SUPPRESSION;
if (aThebesContext->CurrentMatrix().HasNonIntegerTranslation()) {
flags |= nsLayoutUtils::PAINT_IN_TRANSFORM;
}
if (!(aFlags & RENDER_ASYNC_DECODE_IMAGES)) {
flags |= nsLayoutUtils::PAINT_SYNC_DECODE_IMAGES;
}
if (aFlags & RENDER_USE_WIDGET_LAYERS) {
// We only support using widget layers on display root's with widgets.
nsIView* view = rootFrame->GetView();
if (view && view->GetWidget() &&
nsLayoutUtils::GetDisplayRootFrame(rootFrame) == rootFrame) {
flags |= nsLayoutUtils::PAINT_WIDGET_LAYERS;
}
}
if (!(aFlags & RENDER_CARET)) {
wouldFlushRetainedLayers = true;
flags |= nsLayoutUtils::PAINT_HIDE_CARET;
}
if (aFlags & RENDER_IGNORE_VIEWPORT_SCROLLING) {
wouldFlushRetainedLayers = !IgnoringViewportScrolling();
mRenderFlags = ChangeFlag(mRenderFlags, true, STATE_IGNORING_VIEWPORT_SCROLLING);
}
if (aFlags & RENDER_DOCUMENT_RELATIVE) {
// XXX be smarter about this ... drawWindow might want a rect
// that's "pretty close" to what our retained layer tree covers.
// In that case, it wouldn't disturb normal rendering too much,
// and we should allow it.
wouldFlushRetainedLayers = true;
flags |= nsLayoutUtils::PAINT_DOCUMENT_RELATIVE;
}
// Don't let drawWindow blow away our retained layer tree
if ((flags & nsLayoutUtils::PAINT_WIDGET_LAYERS) && wouldFlushRetainedLayers) {
flags &= ~nsLayoutUtils::PAINT_WIDGET_LAYERS;
}
nsLayoutUtils::PaintFrame(rc, rootFrame, nsRegion(aRect),
aBackgroundColor, flags);
// if we had to use a group, paint it to the destination now
if (needsGroup) {
aThebesContext->Restore();
aThebesContext->PopGroupToSource();
aThebesContext->Paint();
}
return NS_OK;
}
/*
* Clip the display list aList to a range. Returns the clipped
* rectangle surrounding the range.
*/
nsRect
PresShell::ClipListToRange(nsDisplayListBuilder *aBuilder,
nsDisplayList* aList,
nsRange* aRange)
{
NS_TIME_FUNCTION_WITH_DOCURL;
// iterate though the display items and add up the bounding boxes of each.
// This will allow the total area of the frames within the range to be
// determined. To do this, remove an item from the bottom of the list, check
// whether it should be part of the range, and if so, append it to the top
// of the temporary list tmpList. If the item is a text frame at the end of
// the selection range, wrap it in an nsDisplayClip to clip the display to
// the portion of the text frame that is part of the selection. Then, append
// the wrapper to the top of the list. Otherwise, just delete the item and
// don't append it.
nsRect surfaceRect;
nsDisplayList tmpList;
nsDisplayItem* i;
while ((i = aList->RemoveBottom())) {
// itemToInsert indiciates the item that should be inserted into the
// temporary list. If null, no item should be inserted.
nsDisplayItem* itemToInsert = nsnull;
nsIFrame* frame = i->GetUnderlyingFrame();
if (frame) {
nsIContent* content = frame->GetContent();
if (content) {
bool atStart = (content == aRange->GetStartParent());
bool atEnd = (content == aRange->GetEndParent());
if ((atStart || atEnd) && frame->GetType() == nsGkAtoms::textFrame) {
PRInt32 frameStartOffset, frameEndOffset;
frame->GetOffsets(frameStartOffset, frameEndOffset);
PRInt32 hilightStart =
atStart ? NS_MAX(aRange->StartOffset(), frameStartOffset) : frameStartOffset;
PRInt32 hilightEnd =
atEnd ? NS_MIN(aRange->EndOffset(), frameEndOffset) : frameEndOffset;
if (hilightStart < hilightEnd) {
// determine the location of the start and end edges of the range.
nsPoint startPoint, endPoint;
frame->GetPointFromOffset(hilightStart, &startPoint);
frame->GetPointFromOffset(hilightEnd, &endPoint);
// the clip rectangle is determined by taking the the start and
// end points of the range, offset from the reference frame.
// Because of rtl, the end point may be to the left of the
// start point, so x is set to the lowest value
nsRect textRect(aBuilder->ToReferenceFrame(frame), frame->GetSize());
nscoord x = NS_MIN(startPoint.x, endPoint.x);
textRect.x += x;
textRect.width = NS_MAX(startPoint.x, endPoint.x) - x;
surfaceRect.UnionRect(surfaceRect, textRect);
// wrap the item in an nsDisplayClip so that it can be clipped to
// the selection. If the allocation fails, fall through and delete
// the item below.
itemToInsert = new (aBuilder)
nsDisplayClip(aBuilder, frame, i, textRect);
}
}
// Don't try to descend into subdocuments.
// If this ever changes we'd need to add handling for subdocuments with
// different zoom levels.
else if (content->GetCurrentDoc() ==
aRange->GetStartParent()->GetCurrentDoc()) {
// if the node is within the range, append it to the temporary list
bool before, after;
nsresult rv =
nsRange::CompareNodeToRange(content, aRange, &before, &after);
if (NS_SUCCEEDED(rv) && !before && !after) {
itemToInsert = i;
surfaceRect.UnionRect(surfaceRect, i->GetBounds(aBuilder));
}
}
}
}
// insert the item into the list if necessary. If the item has a child
// list, insert that as well
nsDisplayList* sublist = i->GetList();
if (itemToInsert || sublist) {
tmpList.AppendToTop(itemToInsert ? itemToInsert : i);
// if the item is a list, iterate over it as well
if (sublist)
surfaceRect.UnionRect(surfaceRect,
ClipListToRange(aBuilder, sublist, aRange));
}
else {
// otherwise, just delete the item and don't readd it to the list
i->~nsDisplayItem();
}
}
// now add all the items back onto the original list again
aList->AppendToTop(&tmpList);
return surfaceRect;
}
#ifdef DEBUG
#include <stdio.h>
static bool gDumpRangePaintList = false;
#endif
RangePaintInfo*
PresShell::CreateRangePaintInfo(nsIDOMRange* aRange,
nsRect& aSurfaceRect,
bool aForPrimarySelection)
{
NS_TIME_FUNCTION_WITH_DOCURL;
RangePaintInfo* info = nsnull;
nsRange* range = static_cast<nsRange*>(aRange);
nsIFrame* ancestorFrame;
nsIFrame* rootFrame = GetRootFrame();
// If the start or end of the range is the document, just use the root
// frame, otherwise get the common ancestor of the two endpoints of the
// range.
nsINode* startParent = range->GetStartParent();
nsINode* endParent = range->GetEndParent();
nsIDocument* doc = startParent->GetCurrentDoc();
if (startParent == doc || endParent == doc) {
ancestorFrame = rootFrame;
}
else {
nsINode* ancestor = nsContentUtils::GetCommonAncestor(startParent, endParent);
NS_ASSERTION(!ancestor || ancestor->IsNodeOfType(nsINode::eCONTENT),
"common ancestor is not content");
if (!ancestor || !ancestor->IsNodeOfType(nsINode::eCONTENT))
return nsnull;
nsIContent* ancestorContent = static_cast<nsIContent*>(ancestor);
ancestorFrame = ancestorContent->GetPrimaryFrame();
// use the nearest ancestor frame that includes all continuations as the
// root for building the display list
while (ancestorFrame &&
nsLayoutUtils::GetNextContinuationOrSpecialSibling(ancestorFrame))
ancestorFrame = ancestorFrame->GetParent();
}
if (!ancestorFrame)
return nsnull;
info = new RangePaintInfo(range, ancestorFrame);
nsRect ancestorRect = ancestorFrame->GetVisualOverflowRect();
// get a display list containing the range
info->mBuilder.SetIncludeAllOutOfFlows();
if (aForPrimarySelection) {
info->mBuilder.SetSelectedFramesOnly();
}
info->mBuilder.EnterPresShell(ancestorFrame, ancestorRect);
ancestorFrame->BuildDisplayListForStackingContext(&info->mBuilder,
ancestorRect, &info->mList);
#ifdef DEBUG
if (gDumpRangePaintList) {
fprintf(stderr, "CreateRangePaintInfo --- before ClipListToRange:\n");
nsFrame::PrintDisplayList(&(info->mBuilder), info->mList);
}
#endif
nsRect rangeRect = ClipListToRange(&info->mBuilder, &info->mList, range);
info->mBuilder.LeavePresShell(ancestorFrame, ancestorRect);
#ifdef DEBUG
if (gDumpRangePaintList) {
fprintf(stderr, "CreateRangePaintInfo --- after ClipListToRange:\n");
nsFrame::PrintDisplayList(&(info->mBuilder), info->mList);
}
#endif
// determine the offset of the reference frame for the display list
// to the root frame. This will allow the coordinates used when painting
// to all be offset from the same point
info->mRootOffset = ancestorFrame->GetOffsetTo(rootFrame);
rangeRect.MoveBy(info->mRootOffset);
aSurfaceRect.UnionRect(aSurfaceRect, rangeRect);
return info;
}
already_AddRefed<gfxASurface>
PresShell::PaintRangePaintInfo(nsTArray<nsAutoPtr<RangePaintInfo> >* aItems,
nsISelection* aSelection,
nsIntRegion* aRegion,
nsRect aArea,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
NS_TIME_FUNCTION_WITH_DOCURL;
nsPresContext* pc = GetPresContext();
if (!pc || aArea.width == 0 || aArea.height == 0)
return nsnull;
nsDeviceContext* deviceContext = pc->DeviceContext();
// use the rectangle to create the surface
nsIntRect pixelArea = aArea.ToOutsidePixels(pc->AppUnitsPerDevPixel());
// if the area of the image is larger than the maximum area, scale it down
float scale = 0.0;
nsIntRect rootScreenRect =
GetRootFrame()->GetScreenRectInAppUnits().ToNearestPixels(
pc->AppUnitsPerDevPixel());
// if the image is larger in one or both directions than half the size of
// the available screen area, scale the image down to that size.
nsRect maxSize;
deviceContext->GetClientRect(maxSize);
nscoord maxWidth = pc->AppUnitsToDevPixels(maxSize.width >> 1);
nscoord maxHeight = pc->AppUnitsToDevPixels(maxSize.height >> 1);
bool resize = (pixelArea.width > maxWidth || pixelArea.height > maxHeight);
if (resize) {
scale = 1.0;
// divide the maximum size by the image size in both directions. Whichever
// direction produces the smallest result determines how much should be
// scaled.
if (pixelArea.width > maxWidth)
scale = NS_MIN(scale, float(maxWidth) / pixelArea.width);
if (pixelArea.height > maxHeight)
scale = NS_MIN(scale, float(maxHeight) / pixelArea.height);
pixelArea.width = NSToIntFloor(float(pixelArea.width) * scale);
pixelArea.height = NSToIntFloor(float(pixelArea.height) * scale);
// adjust the screen position based on the rescaled size
nscoord left = rootScreenRect.x + pixelArea.x;
nscoord top = rootScreenRect.y + pixelArea.y;
aScreenRect->x = NSToIntFloor(aPoint.x - float(aPoint.x - left) * scale);
aScreenRect->y = NSToIntFloor(aPoint.y - float(aPoint.y - top) * scale);
}
else {
// move aScreenRect to the position of the surface in screen coordinates
aScreenRect->MoveTo(rootScreenRect.x + pixelArea.x, rootScreenRect.y + pixelArea.y);
}
aScreenRect->width = pixelArea.width;
aScreenRect->height = pixelArea.height;
gfxImageSurface* surface =
new gfxImageSurface(gfxIntSize(pixelArea.width, pixelArea.height),
gfxImageSurface::ImageFormatARGB32);
if (surface->CairoStatus()) {
delete surface;
return nsnull;
}
// clear the image
gfxContext context(surface);
context.SetOperator(gfxContext::OPERATOR_CLEAR);
context.Rectangle(gfxRect(0, 0, pixelArea.width, pixelArea.height));
context.Fill();
nsRefPtr<nsRenderingContext> rc = new nsRenderingContext();
rc->Init(deviceContext, surface);
if (aRegion) {
// Convert aRegion from CSS pixels to dev pixels
nsIntRegion region =
aRegion->ToAppUnits(nsPresContext::AppUnitsPerCSSPixel())
.ToOutsidePixels(pc->AppUnitsPerDevPixel());
rc->SetClip(region);
}
if (resize)
rc->Scale(scale, scale);
// translate so that points are relative to the surface area
rc->Translate(-aArea.TopLeft());
// temporarily hide the selection so that text is drawn normally. If a
// selection is being rendered, use that, otherwise use the presshell's
// selection.
nsRefPtr<nsFrameSelection> frameSelection;
if (aSelection) {
nsCOMPtr<nsISelectionPrivate> selpriv = do_QueryInterface(aSelection);
selpriv->GetFrameSelection(getter_AddRefs(frameSelection));
}
else {
frameSelection = FrameSelection();
}
PRInt16 oldDisplaySelection = frameSelection->GetDisplaySelection();
frameSelection->SetDisplaySelection(nsISelectionController::SELECTION_HIDDEN);
// next, paint each range in the selection
PRInt32 count = aItems->Length();
for (PRInt32 i = 0; i < count; i++) {
RangePaintInfo* rangeInfo = (*aItems)[i];
// the display lists paint relative to the offset from the reference
// frame, so translate the rendering context
nsRenderingContext::AutoPushTranslation
translate(rc, rangeInfo->mRootOffset);
aArea.MoveBy(-rangeInfo->mRootOffset.x, -rangeInfo->mRootOffset.y);
nsRegion visible(aArea);
rangeInfo->mList.ComputeVisibilityForRoot(&rangeInfo->mBuilder, &visible);
rangeInfo->mList.PaintRoot(&rangeInfo->mBuilder, rc, nsDisplayList::PAINT_DEFAULT);
aArea.MoveBy(rangeInfo->mRootOffset.x, rangeInfo->mRootOffset.y);
}
// restore the old selection display state
frameSelection->SetDisplaySelection(oldDisplaySelection);
NS_ADDREF(surface);
return surface;
}
already_AddRefed<gfxASurface>
PresShell::RenderNode(nsIDOMNode* aNode,
nsIntRegion* aRegion,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
// area will hold the size of the surface needed to draw the node, measured
// from the root frame.
nsRect area;
nsTArray<nsAutoPtr<RangePaintInfo> > rangeItems;
// nothing to draw if the node isn't in a document
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
if (!node->IsInDoc())
return nsnull;
nsRefPtr<nsRange> range = new nsRange();
if (NS_FAILED(range->SelectNode(aNode)))
return nsnull;
RangePaintInfo* info = CreateRangePaintInfo(range, area, false);
if (info && !rangeItems.AppendElement(info)) {
delete info;
return nsnull;
}
if (aRegion) {
// combine the area with the supplied region
nsIntRect rrectPixels = aRegion->GetBounds();
nsRect rrect = rrectPixels.ToAppUnits(nsPresContext::AppUnitsPerCSSPixel());
area.IntersectRect(area, rrect);
nsPresContext* pc = GetPresContext();
if (!pc)
return nsnull;
// move the region so that it is offset from the topleft corner of the surface
aRegion->MoveBy(-pc->AppUnitsToDevPixels(area.x),
-pc->AppUnitsToDevPixels(area.y));
}
return PaintRangePaintInfo(&rangeItems, nsnull, aRegion, area, aPoint,
aScreenRect);
}
already_AddRefed<gfxASurface>
PresShell::RenderSelection(nsISelection* aSelection,
nsIntPoint& aPoint,
nsIntRect* aScreenRect)
{
// area will hold the size of the surface needed to draw the selection,
// measured from the root frame.
nsRect area;
nsTArray<nsAutoPtr<RangePaintInfo> > rangeItems;
// iterate over each range and collect them into the rangeItems array.
// This is done so that the size of selection can be determined so as
// to allocate a surface area
PRInt32 numRanges;
aSelection->GetRangeCount(&numRanges);
NS_ASSERTION(numRanges > 0, "RenderSelection called with no selection");
for (PRInt32 r = 0; r < numRanges; r++)
{
nsCOMPtr<nsIDOMRange> range;
aSelection->GetRangeAt(r, getter_AddRefs(range));
RangePaintInfo* info = CreateRangePaintInfo(range, area, true);
if (info && !rangeItems.AppendElement(info)) {
delete info;
return nsnull;
}
}
return PaintRangePaintInfo(&rangeItems, aSelection, nsnull, area, aPoint,
aScreenRect);
}
nsresult
PresShell::AddPrintPreviewBackgroundItem(nsDisplayListBuilder& aBuilder,
nsDisplayList& aList,
nsIFrame* aFrame,
const nsRect& aBounds)
{
return aList.AppendNewToBottom(new (&aBuilder)
nsDisplaySolidColor(&aBuilder, aFrame, aBounds, NS_RGB(115, 115, 115)));
}
static bool
AddCanvasBackgroundColor(const nsDisplayList& aList, nsIFrame* aCanvasFrame,
nscolor aColor)
{
for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) {
if (i->GetUnderlyingFrame() == aCanvasFrame &&
i->GetType() == nsDisplayItem::TYPE_CANVAS_BACKGROUND) {
nsDisplayCanvasBackground* bg = static_cast<nsDisplayCanvasBackground*>(i);
bg->SetExtraBackgroundColor(aColor);
return true;
}
nsDisplayList* sublist = i->GetList();
if (sublist && AddCanvasBackgroundColor(*sublist, aCanvasFrame, aColor))
return true;
}
return false;
}
nsresult PresShell::AddCanvasBackgroundColorItem(nsDisplayListBuilder& aBuilder,
nsDisplayList& aList,
nsIFrame* aFrame,
const nsRect& aBounds,
nscolor aBackstopColor,
PRUint32 aFlags)
{
if (aBounds.IsEmpty()) {
return NS_OK;
}
// We don't want to add an item for the canvas background color if the frame
// (sub)tree we are painting doesn't include any canvas frames. There isn't
// an easy way to check this directly, but if we check if the root of the
// (sub)tree we are painting is a canvas frame that should cover us in all
// cases (it will usually be a viewport frame when we have a canvas frame in
// the (sub)tree).
if (!(aFlags & nsIPresShell::FORCE_DRAW) &&
!nsCSSRendering::IsCanvasFrame(aFrame)) {
return NS_OK;
}
nscolor bgcolor = NS_ComposeColors(aBackstopColor, mCanvasBackgroundColor);
if (NS_GET_A(bgcolor) == 0)
return NS_OK;
// To make layers work better, we want to avoid having a big non-scrolled
// color background behind a scrolled transparent background. Instead,
// we'll try to move the color background into the scrolled content
// by making nsDisplayCanvasBackground paint it.
if (!aFrame->GetParent()) {
nsIScrollableFrame* sf =
aFrame->PresContext()->PresShell()->GetRootScrollFrameAsScrollable();
if (sf) {
nsCanvasFrame* canvasFrame = do_QueryFrame(sf->GetScrolledFrame());
if (canvasFrame && canvasFrame->IsVisibleForPainting(&aBuilder)) {
if (AddCanvasBackgroundColor(aList, canvasFrame, bgcolor))
return NS_OK;
}
}
}
return aList.AppendNewToBottom(
new (&aBuilder) nsDisplaySolidColor(&aBuilder, aFrame, aBounds, bgcolor));
}
static bool IsTransparentContainerElement(nsPresContext* aPresContext)
{
nsCOMPtr<nsISupports> container = aPresContext->GetContainerInternal();
nsCOMPtr<nsIDocShellTreeItem> docShellItem = do_QueryInterface(container);
nsCOMPtr<nsPIDOMWindow> pwin(do_GetInterface(docShellItem));
if (!pwin)
return false;
nsCOMPtr<nsIContent> containerElement =
do_QueryInterface(pwin->GetFrameElementInternal());
return containerElement &&
containerElement->HasAttr(kNameSpaceID_None, nsGkAtoms::transparent);
}
nscolor PresShell::GetDefaultBackgroundColorToDraw()
{
if (!mPresContext || !mPresContext->GetBackgroundColorDraw()) {
return NS_RGB(255,255,255);
}
return mPresContext->DefaultBackgroundColor();
}
void PresShell::UpdateCanvasBackground()
{
// If we have a frame tree and it has style information that
// specifies the background color of the canvas, update our local
// cache of that color.
nsIFrame* rootStyleFrame = FrameConstructor()->GetRootElementStyleFrame();
if (rootStyleFrame) {
nsStyleContext* bgStyle =
nsCSSRendering::FindRootFrameBackground(rootStyleFrame);
// XXX We should really be passing the canvasframe, not the root element
// style frame but we don't have access to the canvasframe here. It isn't
// a problem because only a few frames can return something other than true
// and none of them would be a canvas frame or root element style frame.
mCanvasBackgroundColor =
nsCSSRendering::DetermineBackgroundColor(mPresContext, bgStyle,
rootStyleFrame);
if (GetPresContext()->IsRootContentDocument() &&
!IsTransparentContainerElement(mPresContext)) {
mCanvasBackgroundColor =
NS_ComposeColors(GetDefaultBackgroundColorToDraw(), mCanvasBackgroundColor);
}
}
// If the root element of the document (ie html) has style 'display: none'
// then the document's background color does not get drawn; cache the
// color we actually draw.
if (!FrameConstructor()->GetRootElementFrame()) {
mCanvasBackgroundColor = GetDefaultBackgroundColorToDraw();
}
if (XRE_GetProcessType() == GeckoProcessType_Content) {
if (TabChild* tabChild = GetTabChildFrom(this)) {
tabChild->SetBackgroundColor(mCanvasBackgroundColor);
}
}
}
nscolor PresShell::ComputeBackstopColor(nsIView* aDisplayRoot)
{
nsIWidget* widget = aDisplayRoot->GetWidget();
if (widget && widget->GetTransparencyMode() != eTransparencyOpaque) {
// Within a transparent widget, so the backstop color must be
// totally transparent.
return NS_RGBA(0,0,0,0);
}
// Within an opaque widget (or no widget at all), so the backstop
// color must be totally opaque. The user's default background
// as reported by the prescontext is guaranteed to be opaque.
return GetDefaultBackgroundColorToDraw();
}
struct PaintParams {
nscolor mBackgroundColor;
};
LayerManager* PresShell::GetLayerManager()
{
NS_ASSERTION(mViewManager, "Should have view manager");
nsIView* rootView = mViewManager->GetRootView();
if (rootView) {
if (nsIWidget* widget = rootView->GetWidget()) {
return widget->GetLayerManager();
}
}
return nsnull;
}
void PresShell::SetIgnoreViewportScrolling(bool aIgnore)
{
if (IgnoringViewportScrolling() == aIgnore) {
return;
}
RenderingState state(this);
state.mRenderFlags = ChangeFlag(state.mRenderFlags, aIgnore,
STATE_IGNORING_VIEWPORT_SCROLLING);
SetRenderingState(state);
}
void PresShell::SetDisplayPort(const nsRect& aDisplayPort)
{
NS_ABORT_IF_FALSE(false, "SetDisplayPort is deprecated");
}
nsresult PresShell::SetResolution(float aXResolution, float aYResolution)
{
if (!(aXResolution > 0.0 && aXResolution > 0.0)) {
return NS_ERROR_ILLEGAL_VALUE;
}
if (aXResolution == mXResolution && aYResolution == mYResolution) {
return NS_OK;
}
RenderingState state(this);
state.mXResolution = aXResolution;
state.mYResolution = aYResolution;
SetRenderingState(state);
return NS_OK;
}
void PresShell::SetRenderingState(const RenderingState& aState)
{
if (mRenderFlags != aState.mRenderFlags) {
// Rendering state changed in a way that forces us to flush any
// retained layers we might already have.
LayerManager* manager = GetLayerManager();
if (manager) {
FrameLayerBuilder::InvalidateAllLayers(manager);
}
}
mRenderFlags = aState.mRenderFlags;
mXResolution = aState.mXResolution;
mYResolution = aState.mYResolution;
}
void PresShell::SynthesizeMouseMove(bool aFromScroll)
{
if (mPaintingSuppressed || !mIsActive || !mPresContext) {
return;
}
if (!mPresContext->IsRoot()) {
nsIPresShell* rootPresShell = GetRootPresShell();
if (rootPresShell) {
rootPresShell->SynthesizeMouseMove(aFromScroll);
}
return;
}
if (mMouseLocation == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE))
return;
if (!mSynthMouseMoveEvent.IsPending()) {
nsRefPtr<nsSynthMouseMoveEvent> ev =
new nsSynthMouseMoveEvent(this, aFromScroll);
if (!GetPresContext()->RefreshDriver()->AddRefreshObserver(ev,
Flush_Display)) {
NS_WARNING("failed to dispatch nsSynthMouseMoveEvent");
return;
}
mSynthMouseMoveEvent = ev;
}
}
/**
* Find the first floating view with a widget in a postorder traversal of the
* view tree that contains the point. Thus more deeply nested floating views
* are preferred over their ancestors, and floating views earlier in the
* view hierarchy (i.e., added later) are preferred over their siblings.
* This is adequate for finding the "topmost" floating view under a point,
* given that floating views don't supporting having a specific z-index.
*
* We cannot exit early when aPt is outside the view bounds, because floating
* views aren't necessarily included in their parent's bounds, so this could
* traverse the entire view hierarchy --- use carefully.
*/
static nsIView* FindFloatingViewContaining(nsIView* aView, nsPoint aPt)
{
if (aView->GetVisibility() == nsViewVisibility_kHide)
// No need to look into descendants.
return nsnull;
nsIFrame* frame = aView->GetFrame();
if (frame) {
if (!frame->IsVisibleConsideringAncestors(nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY) ||
!frame->PresContext()->PresShell()->IsActive()) {
return nsnull;
}
}
for (nsIView* v = aView->GetFirstChild(); v; v = v->GetNextSibling()) {
nsIView* r = FindFloatingViewContaining(v, v->ConvertFromParentCoords(aPt));
if (r)
return r;
}
if (aView->GetFloating() && aView->HasWidget() &&
aView->GetDimensions().Contains(aPt))
return aView;
return nsnull;
}
/*
* This finds the first view containing the given point in a postorder
* traversal of the view tree that contains the point, assuming that the
* point is not in a floating view. It assumes that only floating views
* extend outside the bounds of their parents.
*
* This methods should only be called if FindFloatingViewContaining
* returns null.
*/
static nsIView* FindViewContaining(nsIView* aView, nsPoint aPt)
{
if (!aView->GetDimensions().Contains(aPt) ||
aView->GetVisibility() == nsViewVisibility_kHide) {
return nsnull;
}
nsIFrame* frame = aView->GetFrame();
if (frame) {
if (!frame->IsVisibleConsideringAncestors(nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY) ||
!frame->PresContext()->PresShell()->IsActive()) {
return nsnull;
}
}
for (nsIView* v = aView->GetFirstChild(); v; v = v->GetNextSibling()) {
nsIView* r = FindViewContaining(v, v->ConvertFromParentCoords(aPt));
if (r)
return r;
}
return aView;
}
void
PresShell::ProcessSynthMouseMoveEvent(bool aFromScroll)
{
// allow new event to be posted while handling this one only if the
// source of the event is a scroll (to prevent infinite reflow loops)
if (aFromScroll) {
mSynthMouseMoveEvent.Forget();
}
nsIView* rootView = mViewManager ? mViewManager->GetRootView() : nsnull;
if (mMouseLocation == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE) ||
!rootView || !rootView->HasWidget() || !mPresContext) {
mSynthMouseMoveEvent.Forget();
return;
}
NS_ASSERTION(mPresContext->IsRoot(), "Only a root pres shell should be here");
// Hold a ref to ourselves so DispatchEvent won't destroy us (since
// we need to access members after we call DispatchEvent).
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
#ifdef DEBUG_MOUSE_LOCATION
printf("[ps=%p]synthesizing mouse move to (%d,%d)\n",
this, mMouseLocation.x, mMouseLocation.y);
#endif
PRInt32 APD = mPresContext->AppUnitsPerDevPixel();
// We need a widget to put in the event we are going to dispatch so we look
// for a view that has a widget and the mouse location is over. We first look
// for floating views, if there isn't one we use the root view. |view| holds
// that view.
nsIView* view = nsnull;
// The appunits per devpixel ratio of |view|.
PRInt32 viewAPD;
// refPoint will be mMouseLocation relative to the widget of |view|, the
// widget we will put in the event we dispatch, in viewAPD appunits
nsPoint refpoint(0, 0);
// We always dispatch the event to the pres shell that contains the view that
// the mouse is over. pointVM is the VM of that pres shell.
nsIViewManager *pointVM = nsnull;
// This could be a bit slow (traverses entire view hierarchy)
// but it's OK to do it once per synthetic mouse event
view = FindFloatingViewContaining(rootView, mMouseLocation);
if (!view) {
view = rootView;
nsIView *pointView = FindViewContaining(rootView, mMouseLocation);
// pointView can be null in situations related to mouse capture
pointVM = (pointView ? pointView : view)->GetViewManager();
refpoint = mMouseLocation + rootView->ViewToWidgetOffset();
viewAPD = APD;
} else {
pointVM = view->GetViewManager();
nsIFrame* frame = view->GetFrame();
NS_ASSERTION(frame, "floating views can't be anonymous");
viewAPD = frame->PresContext()->AppUnitsPerDevPixel();
refpoint = mMouseLocation.ConvertAppUnits(APD, viewAPD);
refpoint -= view->GetOffsetTo(rootView);
refpoint += view->ViewToWidgetOffset();
}
NS_ASSERTION(view->GetWidget(), "view should have a widget here");
nsMouseEvent event(true, NS_MOUSE_MOVE, view->GetWidget(),
nsMouseEvent::eSynthesized);
event.refPoint = refpoint.ToNearestPixels(viewAPD);
event.time = PR_IntervalNow();
// XXX set event.isShift, event.isControl, event.isAlt, event.isMeta ?
nsCOMPtr<nsIPresShell> shell = pointVM->GetPresShell();
if (shell) {
shell->DispatchSynthMouseMove(&event, !aFromScroll);
}
if (!aFromScroll) {
mSynthMouseMoveEvent.Forget();
}
}
void
PresShell::Paint(nsIView* aViewToPaint,
nsIWidget* aWidgetToPaint,
const nsRegion& aDirtyRegion,
const nsIntRegion& aIntDirtyRegion,
bool aPaintDefaultBackground,
bool aWillSendDidPaint)
{
#ifdef NS_FUNCTION_TIMER
NS_TIME_FUNCTION_DECLARE_DOCURL;
const nsRect& bounds__ = aDirtyRegion.GetBounds();
NS_TIME_FUNCTION_MIN_FMT(1.0, "%s (line %d) (document: %s, dirty rect: (<%f, %f>, <%f, %f>)",
MOZ_FUNCTION_NAME, __LINE__, docURL__.get(),
NSCoordToFloat(bounds__.x),
NSCoordToFloat(bounds__.y),
NSCoordToFloat(bounds__.XMost()),
NSCoordToFloat(bounds__.YMost()));
#endif
SAMPLE_LABEL("Paint", "PresShell::Paint");
NS_ASSERTION(!mIsDestroying, "painting a destroyed PresShell");
NS_ASSERTION(aViewToPaint, "null view");
NS_ASSERTION(aWidgetToPaint, "Can't paint without a widget");
nsPresContext* presContext = GetPresContext();
AUTO_LAYOUT_PHASE_ENTRY_POINT(presContext, Paint);
nsIFrame* frame = aPaintDefaultBackground ? nsnull : aViewToPaint->GetFrame();
bool isRetainingManager;
LayerManager* layerManager =
aWidgetToPaint->GetLayerManager(&isRetainingManager);
NS_ASSERTION(layerManager, "Must be in paint event");
layerManager->BeginTransaction();
if (frame && isRetainingManager) {
// Try to do an empty transaction, if the frame tree does not
// need to be updated. Do not try to do an empty transaction on
// a non-retained layer manager (like the BasicLayerManager that
// draws the window title bar on Mac), because a) it won't work
// and b) below we don't want to clear NS_FRAME_UPDATE_LAYER_TREE,
// that will cause us to forget to update the real layer manager!
if (!(frame->GetStateBits() & NS_FRAME_UPDATE_LAYER_TREE)) {
if (layerManager->EndEmptyTransaction()) {
frame->UpdatePaintCountForPaintedPresShells();
presContext->NotifyDidPaintForSubtree();
return;
}
}
frame->RemoveStateBits(NS_FRAME_UPDATE_LAYER_TREE);
}
if (frame) {
frame->ClearPresShellsFromLastPaint();
}
nscolor bgcolor = ComputeBackstopColor(aViewToPaint);
if (frame) {
// Defer invalidates that are triggered during painting, and discard
// invalidates of areas that are already being repainted.
// The layer system can trigger invalidates during painting
// (see FrameLayerBuilder).
frame->BeginDeferringInvalidatesForDisplayRoot(aDirtyRegion);
// We can paint directly into the widget using its layer manager.
// When we get rid of child widgets, this will be the only path we
// need. (aPaintDefaultBackground will never be needed since the
// chrome can always paint a default background.)
nsLayoutUtils::PaintFrame(nsnull, frame, aDirtyRegion, bgcolor,
nsLayoutUtils::PAINT_WIDGET_LAYERS |
nsLayoutUtils::PAINT_EXISTING_TRANSACTION);
frame->EndDeferringInvalidatesForDisplayRoot();
presContext->NotifyDidPaintForSubtree();
return;
}
nsRefPtr<ColorLayer> root = layerManager->CreateColorLayer();
if (root) {
nsPresContext* pc = GetPresContext();
nsIntRect bounds =
pc->GetVisibleArea().ToOutsidePixels(pc->AppUnitsPerDevPixel());
bgcolor = NS_ComposeColors(bgcolor, mCanvasBackgroundColor);
root->SetColor(bgcolor);
root->SetVisibleRegion(bounds);
layerManager->SetRoot(root);
}
layerManager->EndTransaction(NULL, NULL);
presContext->NotifyDidPaintForSubtree();
}
// static
void
nsIPresShell::SetCapturingContent(nsIContent* aContent, PRUint8 aFlags)
{
NS_IF_RELEASE(gCaptureInfo.mContent);
// only set capturing content if allowed or the CAPTURE_IGNOREALLOWED flag
// is used
if ((aFlags & CAPTURE_IGNOREALLOWED) || gCaptureInfo.mAllowed) {
if (aContent) {
NS_ADDREF(gCaptureInfo.mContent = aContent);
}
gCaptureInfo.mRetargetToElement = (aFlags & CAPTURE_RETARGETTOELEMENT) != 0;
gCaptureInfo.mPreventDrag = (aFlags & CAPTURE_PREVENTDRAG) != 0;
}
}
nsIFrame*
PresShell::GetCurrentEventFrame()
{
if (NS_UNLIKELY(mIsDestroying)) {
return nsnull;
}
if (!mCurrentEventFrame && mCurrentEventContent) {
// Make sure the content still has a document reference. If not,
// then we assume it is no longer in the content tree and the
// frame shouldn't get an event, nor should we even assume its
// safe to try and find the frame.
if (mCurrentEventContent->GetDocument()) {
mCurrentEventFrame = mCurrentEventContent->GetPrimaryFrame();
}
}
return mCurrentEventFrame;
}
nsIFrame*
PresShell::GetEventTargetFrame()
{
return GetCurrentEventFrame();
}
already_AddRefed<nsIContent>
PresShell::GetEventTargetContent(nsEvent* aEvent)
{
nsIContent* content = nsnull;
if (mCurrentEventContent) {
content = mCurrentEventContent;
NS_IF_ADDREF(content);
} else {
nsIFrame* currentEventFrame = GetCurrentEventFrame();
if (currentEventFrame) {
currentEventFrame->GetContentForEvent(aEvent, &content);
} else {
content = nsnull;
}
}
return content;
}
void
PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent)
{
if (mCurrentEventFrame || mCurrentEventContent) {
mCurrentEventFrameStack.InsertElementAt(0, mCurrentEventFrame);
mCurrentEventContentStack.InsertObjectAt(mCurrentEventContent, 0);
}
mCurrentEventFrame = aFrame;
mCurrentEventContent = aContent;
}
void
PresShell::PopCurrentEventInfo()
{
mCurrentEventFrame = nsnull;
mCurrentEventContent = nsnull;
if (0 != mCurrentEventFrameStack.Length()) {
mCurrentEventFrame = mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
mCurrentEventContent = mCurrentEventContentStack.ObjectAt(0);
mCurrentEventContentStack.RemoveObjectAt(0);
}
}
bool PresShell::InZombieDocument(nsIContent *aContent)
{
// If a content node points to a null document, or the document is not
// attached to a window, then it is possibly in a zombie document,
// about to be replaced by a newly loading document.
// Such documents cannot handle DOM events.
// It might actually be in a node not attached to any document,
// in which case there is not parent presshell to retarget it to.
nsIDocument *doc = aContent->GetDocument();
return !doc || !doc->GetWindow();
}
already_AddRefed<nsPIDOMWindow>
PresShell::GetRootWindow()
{
nsCOMPtr<nsPIDOMWindow> window =
do_QueryInterface(mDocument->GetWindow());
if (window) {
nsCOMPtr<nsPIDOMWindow> rootWindow = window->GetPrivateRoot();
NS_ASSERTION(rootWindow, "nsPIDOMWindow::GetPrivateRoot() returns NULL");
return rootWindow.forget();
}
// If we don't have DOM window, we're zombie, we should find the root window
// with our parent shell.
nsCOMPtr<nsIPresShell> parent = GetParentPresShell();
NS_ENSURE_TRUE(parent, nsnull);
return parent->GetRootWindow();
}
already_AddRefed<nsIPresShell>
PresShell::GetParentPresShell()
{
NS_ENSURE_TRUE(mPresContext, nsnull);
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container) {
container = do_QueryReferent(mForwardingContainer);
}
// Now, find the parent pres shell and send the event there
nsCOMPtr<nsIDocShellTreeItem> treeItem = do_QueryInterface(container);
// Might have gone away, or never been around to start with
NS_ENSURE_TRUE(treeItem, nsnull);
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
treeItem->GetParent(getter_AddRefs(parentTreeItem));
nsCOMPtr<nsIDocShell> parentDocShell = do_QueryInterface(parentTreeItem);
NS_ENSURE_TRUE(parentDocShell && treeItem != parentTreeItem, nsnull);
nsIPresShell* parentPresShell = nsnull;
parentDocShell->GetPresShell(&parentPresShell);
return parentPresShell;
}
nsresult
PresShell::RetargetEventToParent(nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
// Send this events straight up to the parent pres shell.
// We do this for keystroke events in zombie documents or if either a frame
// or a root content is not present.
// That way at least the UI key bindings can work.
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
nsCOMPtr<nsIPresShell> parentPresShell = GetParentPresShell();
NS_ENSURE_TRUE(parentPresShell, NS_ERROR_FAILURE);
// Fake the event as though it's from the parent pres shell's root frame.
return parentPresShell->HandleEvent(parentPresShell->GetRootFrame(), aEvent, true, aEventStatus);
}
void
PresShell::DisableNonTestMouseEvents(bool aDisable)
{
sDisableNonTestMouseEvents = aDisable;
}
already_AddRefed<nsPIDOMWindow>
PresShell::GetFocusedDOMWindowInOurWindow()
{
nsCOMPtr<nsPIDOMWindow> rootWindow = GetRootWindow();
NS_ENSURE_TRUE(rootWindow, nsnull);
nsPIDOMWindow* focusedWindow;
nsFocusManager::GetFocusedDescendant(rootWindow, true, &focusedWindow);
return focusedWindow;
}
void
PresShell::RecordMouseLocation(nsGUIEvent* aEvent)
{
if (!mPresContext)
return;
if (!mPresContext->IsRoot()) {
PresShell* rootPresShell = GetRootPresShell();
if (rootPresShell) {
rootPresShell->RecordMouseLocation(aEvent);
}
return;
}
if ((aEvent->message == NS_MOUSE_MOVE &&
static_cast<nsMouseEvent*>(aEvent)->reason == nsMouseEvent::eReal) ||
aEvent->message == NS_MOUSE_ENTER ||
aEvent->message == NS_MOUSE_BUTTON_DOWN ||
aEvent->message == NS_MOUSE_BUTTON_UP) {
nsIFrame* rootFrame = GetRootFrame();
if (!rootFrame) {
nsIView* rootView = mViewManager->GetRootView();
mMouseLocation = nsLayoutUtils::TranslateWidgetToView(mPresContext,
aEvent->widget, aEvent->refPoint, rootView);
} else {
mMouseLocation =
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, rootFrame);
}
#ifdef DEBUG_MOUSE_LOCATION
if (aEvent->message == NS_MOUSE_ENTER)
printf("[ps=%p]got mouse enter for %p\n",
this, aEvent->widget);
printf("[ps=%p]setting mouse location to (%d,%d)\n",
this, mMouseLocation.x, mMouseLocation.y);
#endif
if (aEvent->message == NS_MOUSE_ENTER)
SynthesizeMouseMove(false);
} else if (aEvent->message == NS_MOUSE_EXIT) {
// Although we only care about the mouse moving into an area for which this
// pres shell doesn't receive mouse move events, we don't check which widget
// the mouse exit was for since this seems to vary by platform. Hopefully
// this won't matter at all since we'll get the mouse move or enter after
// the mouse exit when the mouse moves from one of our widgets into another.
mMouseLocation = nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
#ifdef DEBUG_MOUSE_LOCATION
printf("[ps=%p]got mouse exit for %p\n",
this, aEvent->widget);
printf("[ps=%p]clearing mouse location\n",
this);
#endif
}
}
static void
EvictTouchPoint(nsCOMPtr<nsIDOMTouch>& aTouch)
{
nsIWidget *widget = nsnull;
// is there an easier/better way to dig out the widget?
nsCOMPtr<nsINode> node(do_QueryInterface(aTouch->GetTarget()));
if (!node) {
return;
}
nsIDocument* doc = node->GetCurrentDoc();
if (!doc) {
return;
}
nsIPresShell *presShell = doc->GetShell();
if (!presShell) {
return;
}
nsIFrame* frame = presShell->GetRootFrame();
if (!frame) {
return;
}
nsPoint *pt = new nsPoint(aTouch->mRefPoint.x, aTouch->mRefPoint.y);
widget = frame->GetView()->GetNearestWidget(pt);
if (!widget) {
return;
}
nsTouchEvent event(true, NS_TOUCH_END, widget);
event.isShift = false;
event.isControl = false;
event.isAlt = false;
event.isMeta = false;
event.widget = widget;
event.time = PR_IntervalNow();
event.touches.AppendElement(aTouch);
nsEventStatus status;
widget->DispatchEvent(&event, status);
}
static PLDHashOperator
AppendToTouchList(const PRUint32& aKey, nsCOMPtr<nsIDOMTouch>& aData, void *aTouchList)
{
nsTArray<nsCOMPtr<nsIDOMTouch> > *touches = static_cast<nsTArray<nsCOMPtr<nsIDOMTouch> > *>(aTouchList);
aData->mChanged = false;
touches->AppendElement(aData);
return PL_DHASH_NEXT;
}
nsresult
PresShell::HandleEvent(nsIFrame *aFrame,
nsGUIEvent* aEvent,
bool aDontRetargetEvents,
nsEventStatus* aEventStatus)
{
NS_ASSERTION(aFrame, "null frame");
if (mIsDestroying ||
(sDisableNonTestMouseEvents && NS_IS_MOUSE_EVENT(aEvent) &&
!(aEvent->flags & NS_EVENT_FLAG_SYNTHETIC_TEST_EVENT))) {
return NS_OK;
}
RecordMouseLocation(aEvent);
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT) {
NS_TIME_FUNCTION_MIN(1.0);
// Accessibility events come through OS requests and not from scripts,
// so it is safe to handle here
return HandleEventInternal(aEvent, aEventStatus);
}
#endif
if (!nsContentUtils::IsSafeToRunScript())
return NS_OK;
NS_TIME_FUNCTION_MIN(1.0);
nsIContent* capturingContent =
NS_IS_MOUSE_EVENT(aEvent) ? GetCapturingContent() : nsnull;
nsCOMPtr<nsIDocument> retargetEventDoc;
if (!aDontRetargetEvents) {
// key and IME related events should not cross top level window boundary.
// Basically, such input events should be fired only on focused widget.
// However, some IMEs might need to clean up composition after focused
// window is deactivated. And also some tests on MozMill want to test key
// handling on deactivated window because MozMill window can be activated
// during tests. So, there is no merit the events should be redirected to
// active window. So, the events should be handled on the last focused
// content in the last focused DOM window in same top level window.
// Note, if no DOM window has been focused yet, we can discard the events.
if (NS_IsEventTargetedAtFocusedWindow(aEvent)) {
nsCOMPtr<nsPIDOMWindow> window = GetFocusedDOMWindowInOurWindow();
// No DOM window in same top level window has not been focused yet,
// discard the events.
if (!window) {
return NS_OK;
}
retargetEventDoc = do_QueryInterface(window->GetExtantDocument());
if (!retargetEventDoc)
return NS_OK;
} else if (capturingContent) {
// if the mouse is being captured then retarget the mouse event at the
// document that is being captured.
retargetEventDoc = capturingContent->GetCurrentDoc();
}
if (retargetEventDoc) {
nsCOMPtr<nsIPresShell> presShell = retargetEventDoc->GetShell();
if (!presShell)
return NS_OK;
if (presShell != this) {
nsIFrame* frame = presShell->GetRootFrame();
if (!frame) {
if (aEvent->message == NS_QUERY_TEXT_CONTENT ||
NS_IS_CONTENT_COMMAND_EVENT(aEvent)) {
return NS_OK;
}
nsIView* view = presShell->GetViewManager()->GetRootView();
while (view && !view->GetFrame()) {
view = view->GetParent();
}
if (view) {
frame = view->GetFrame();
}
}
if (!frame)
return NS_OK;
nsCOMPtr<nsIPresShell> shell = frame->PresContext()->GetPresShell();
return shell->HandleEvent(frame, aEvent, true, aEventStatus);
}
}
}
// Check for a theme change up front, since the frame type is irrelevant
if (aEvent->message == NS_THEMECHANGED && mPresContext) {
mPresContext->ThemeChanged();
return NS_OK;
}
if (aEvent->message == NS_UISTATECHANGED && mDocument) {
nsPIDOMWindow* win = mDocument->GetWindow();
if (win) {
nsUIStateChangeEvent* event = (nsUIStateChangeEvent*)aEvent;
win->SetKeyboardIndicators(event->showAccelerators, event->showFocusRings);
}
return NS_OK;
}
// Check for a system color change up front, since the frame type is
// irrelevant
if ((aEvent->message == NS_SYSCOLORCHANGED) && mPresContext &&
aFrame == FrameManager()->GetRootFrame()) {
*aEventStatus = nsEventStatus_eConsumeDoDefault;
mPresContext->SysColorChanged();
return NS_OK;
}
if (aEvent->eventStructType == NS_KEY_EVENT &&
mDocument && mDocument->EventHandlingSuppressed()) {
if (aEvent->message == NS_KEY_DOWN) {
mNoDelayedKeyEvents = true;
} else if (!mNoDelayedKeyEvents) {
nsDelayedEvent* event =
new nsDelayedKeyEvent(static_cast<nsKeyEvent*>(aEvent));
if (!mDelayedEvents.AppendElement(event)) {
delete event;
}
}
return NS_OK;
}
nsIFrame* frame = aFrame;
bool dispatchUsingCoordinates = NS_IsEventUsingCoordinates(aEvent);
if (dispatchUsingCoordinates) {
NS_WARN_IF_FALSE(frame, "Nothing to handle this event!");
if (!frame)
return NS_OK;
nsPresContext* framePresContext = frame->PresContext();
nsPresContext* rootPresContext = framePresContext->GetRootPresContext();
NS_ASSERTION(rootPresContext == mPresContext->GetRootPresContext(),
"How did we end up outside the connected prescontext/viewmanager hierarchy?");
// If we aren't starting our event dispatch from the root frame of the root prescontext,
// then someone must be capturing the mouse. In that case we don't want to search the popup
// list.
if (framePresContext == rootPresContext &&
frame == FrameManager()->GetRootFrame()) {
nsIFrame* popupFrame =
nsLayoutUtils::GetPopupFrameForEventCoordinates(rootPresContext, aEvent);
// If the popupFrame is an ancestor of the 'frame', the frame should
// handle the event, otherwise, the popup should handle it.
if (popupFrame &&
!nsContentUtils::ContentIsCrossDocDescendantOf(
framePresContext->GetPresShell()->GetDocument(),
popupFrame->GetContent())) {
frame = popupFrame;
}
}
bool captureRetarget = false;
if (capturingContent) {
// If a capture is active, determine if the docshell is visible. If not,
// clear the capture and target the mouse event normally instead. This
// would occur if the mouse button is held down while a tab change occurs.
// If the docshell is visible, look for a scrolling container.
bool vis;
nsCOMPtr<nsISupports> supports = mPresContext->GetContainer();
nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(supports));
if (baseWin && NS_SUCCEEDED(baseWin->GetVisibility(&vis)) && vis) {
captureRetarget = gCaptureInfo.mRetargetToElement;
if (!captureRetarget) {
// A check was already done above to ensure that capturingContent is
// in this presshell.
NS_ASSERTION(capturingContent->GetCurrentDoc() == GetDocument(),
"Unexpected document");
nsIFrame* captureFrame = capturingContent->GetPrimaryFrame();
if (captureFrame) {
if (capturingContent->Tag() == nsGkAtoms::select &&
capturingContent->IsHTML()) {
// a dropdown <select> has a child in its selectPopupList and we should
// capture on that instead.
nsIFrame* childFrame = captureFrame->GetChildList(nsIFrame::kSelectPopupList).FirstChild();
if (childFrame) {
captureFrame = childFrame;
}
}
// scrollable frames should use the scrolling container as
// the root instead of the document
nsIScrollableFrame* scrollFrame = do_QueryFrame(captureFrame);
if (scrollFrame) {
frame = scrollFrame->GetScrolledFrame();
}
}
}
}
else {
ClearMouseCapture(nsnull);
capturingContent = nsnull;
}
}
bool isWindowLevelMouseExit = (aEvent->message == NS_MOUSE_EXIT) &&
(static_cast<nsMouseEvent*>(aEvent)->exit == nsMouseEvent::eTopLevel);
// Get the frame at the event point. However, don't do this if we're
// capturing and retargeting the event because the captured frame will
// be used instead below. Also keep using the root frame if we're dealing
// with a window-level mouse exit event since we want to start sending
// mouse out events at the root EventStateManager.
if (!captureRetarget && !isWindowLevelMouseExit) {
#ifdef MOZ_TOUCH
nsPoint eventPoint;
if (aEvent->message == NS_TOUCH_START) {
// Add any new touches to the queue
nsTouchEvent* touchEvent = static_cast<nsTouchEvent*>(aEvent);
// if there is only one touch in this touchstart event, assume that it is
// the start of a new touch session and evict any old touches in the
// queue
if (touchEvent->touches.Length() == 1) {
nsTArray<nsCOMPtr<nsIDOMTouch> > touches;
gCaptureTouchList.Enumerate(&AppendToTouchList, (void *)&touches);
for (PRUint32 i = 0; i < touches.Length(); ++i) {
EvictTouchPoint(touches[i]);
}
}
for (PRUint32 i = 0; i < touchEvent->touches.Length(); ++i) {
nsIDOMTouch *touch = touchEvent->touches[i];
nsDOMTouch *domtouch = static_cast<nsDOMTouch*>(touch);
touch->mMessage = aEvent->message;
PRInt32 id = 0;
touch->GetIdentifier(&id);
if (!gCaptureTouchList.Get(id, nsnull)) {
// This event is a new touch. Mark it as a changedTouch and
// add it to the queue.
touch->mChanged = true;
gCaptureTouchList.Put(id, touch);
eventPoint = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, touch->mRefPoint, frame);
} else {
// This touch is an old touch, we need to ensure that is not
// marked as changed and set its target correctly
touch->mChanged = false;
PRInt32 id;
touch->GetIdentifier(&id);
nsCOMPtr<nsIDOMTouch> oldTouch;
gCaptureTouchList.Get(id, getter_AddRefs(oldTouch));
if (oldTouch) {
nsCOMPtr<nsPIDOMEventTarget> targetPtr;
oldTouch->GetTarget(getter_AddRefs(targetPtr));
domtouch->SetTarget(targetPtr);
gCaptureTouchList.Put(id, touch);
}
}
}
} else {
eventPoint = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, frame);
}
#else
nsPoint eventPoint
= nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, frame);
#endif
{
bool ignoreRootScrollFrame = false;
if (aEvent->eventStructType == NS_MOUSE_EVENT) {
ignoreRootScrollFrame = static_cast<nsMouseEvent*>(aEvent)->ignoreRootScrollFrame;
}
nsIFrame* target = nsLayoutUtils::GetFrameForPoint(frame, eventPoint,
false, ignoreRootScrollFrame);
if (target) {
frame = target;
}
}
}
// if a node is capturing the mouse, check if the event needs to be
// retargeted at the capturing content instead. This will be the case when
// capture retargeting is being used, no frame was found or the frame's
// content is not a descendant of the capturing content.
if (capturingContent &&
(gCaptureInfo.mRetargetToElement || !frame->GetContent() ||
!nsContentUtils::ContentIsCrossDocDescendantOf(frame->GetContent(),
capturingContent))) {
// A check was already done above to ensure that capturingContent is
// in this presshell.
NS_ASSERTION(capturingContent->GetCurrentDoc() == GetDocument(),
"Unexpected document");
nsIFrame* capturingFrame = capturingContent->GetPrimaryFrame();
if (capturingFrame) {
frame = capturingFrame;
}
}
// Suppress mouse event if it's being targeted at an element inside
// a document which needs events suppressed
if (aEvent->eventStructType == NS_MOUSE_EVENT &&
frame->PresContext()->Document()->EventHandlingSuppressed()) {
if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
mNoDelayedMouseEvents = true;
} else if (!mNoDelayedMouseEvents && aEvent->message == NS_MOUSE_BUTTON_UP) {
nsDelayedEvent* event =
new nsDelayedMouseEvent(static_cast<nsMouseEvent*>(aEvent));
if (!mDelayedEvents.AppendElement(event)) {
delete event;
}
}
return NS_OK;
}
PresShell* shell =
static_cast<PresShell*>(frame->PresContext()->PresShell());
// Check if we have an active EventStateManager which isn't the
// EventStateManager of the current PresContext.
// If that is the case, and mouse is over some ancestor document,
// forward event handling to the active document.
// This way content can get mouse events even when
// mouse is over the chrome or outside the window.
//
// Note, currently for backwards compatibility we don't forward mouse events
// to the active document when mouse is over some subdocument.
nsEventStateManager* activeESM =
nsEventStateManager::GetActiveEventStateManager();
if (activeESM && NS_IS_MOUSE_EVENT(aEvent) &&
activeESM != shell->GetPresContext()->EventStateManager() &&
static_cast<nsEventStateManager*>(activeESM)->GetPresContext()) {
nsIPresShell* activeShell =
static_cast<nsEventStateManager*>(activeESM)->GetPresContext()->GetPresShell();
if (activeShell &&
nsContentUtils::ContentIsCrossDocDescendantOf(activeShell->GetDocument(),
shell->GetDocument())) {
shell = static_cast<PresShell*>(activeShell);
frame = shell->GetRootFrame();
}
}
if (shell != this) {
// Handle the event in the correct shell.
// Prevent deletion until we're done with event handling (bug 336582).
nsCOMPtr<nsIPresShell> kungFuDeathGrip(shell);
// We pass the subshell's root frame as the frame to start from. This is
// the only correct alternative; if the event was captured then it
// must have been captured by us or some ancestor shell and we
// now ask the subshell to dispatch it normally.
return shell->HandlePositionedEvent(frame, aEvent, aEventStatus);
}
return HandlePositionedEvent(frame, aEvent, aEventStatus);
}
nsresult rv = NS_OK;
if (frame) {
PushCurrentEventInfo(nsnull, nsnull);
// key and IME related events go to the focused frame in this DOM window.
if (NS_IsEventTargetedAtFocusedContent(aEvent)) {
mCurrentEventContent = nsnull;
nsCOMPtr<nsPIDOMWindow> window =
do_QueryInterface(mDocument->GetWindow());
nsCOMPtr<nsPIDOMWindow> focusedWindow;
nsCOMPtr<nsIContent> eventTarget =
nsFocusManager::GetFocusedDescendant(window, false,
getter_AddRefs(focusedWindow));
// otherwise, if there is no focused content or the focused content has
// no frame, just use the root content. This ensures that key events
// still get sent to the window properly if nothing is focused or if a
// frame goes away while it is focused.
if (!eventTarget || !eventTarget->GetPrimaryFrame()) {
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
if (htmlDoc) {
nsCOMPtr<nsIDOMHTMLElement> body;
htmlDoc->GetBody(getter_AddRefs(body));
eventTarget = do_QueryInterface(body);
if (!eventTarget) {
eventTarget = mDocument->GetRootElement();
}
} else {
eventTarget = mDocument->GetRootElement();
}
}
if (aEvent->message == NS_KEY_DOWN) {
NS_IF_RELEASE(gKeyDownTarget);
NS_IF_ADDREF(gKeyDownTarget = eventTarget);
}
else if ((aEvent->message == NS_KEY_PRESS || aEvent->message == NS_KEY_UP) &&
gKeyDownTarget) {
// If a different element is now focused for the keypress/keyup event
// than what was focused during the keydown event, check if the new
// focused element is not in a chrome document any more, and if so,
// retarget the event back at the keydown target. This prevents a
// content area from grabbing the focus from chrome in-between key
// events.
if (eventTarget &&
nsContentUtils::IsChromeDoc(gKeyDownTarget->GetCurrentDoc()) !=
nsContentUtils::IsChromeDoc(eventTarget->GetCurrentDoc())) {
eventTarget = gKeyDownTarget;
}
if (aEvent->message == NS_KEY_UP) {
NS_RELEASE(gKeyDownTarget);
}
}
mCurrentEventFrame = nsnull;
nsIDocument* targetDoc = eventTarget ? eventTarget->OwnerDoc() : nsnull;
if (targetDoc && targetDoc != mDocument) {
PopCurrentEventInfo();
nsCOMPtr<nsIPresShell> shell = targetDoc->GetShell();
if (shell) {
rv = static_cast<PresShell*>(shell.get())->
HandleRetargetedEvent(aEvent, aEventStatus, eventTarget);
}
return rv;
} else {
mCurrentEventContent = eventTarget;
}
if (!mCurrentEventContent || !GetCurrentEventFrame() ||
InZombieDocument(mCurrentEventContent)) {
rv = RetargetEventToParent(aEvent, aEventStatus);
PopCurrentEventInfo();
return rv;
}
} else {
mCurrentEventFrame = frame;
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aEventStatus);
}
#ifdef NS_DEBUG
ShowEventTargetDebug();
#endif
PopCurrentEventInfo();
} else {
// Activation events need to be dispatched even if no frame was found, since
// we don't want the focus to be out of sync.
if (!NS_EVENT_NEEDS_FRAME(aEvent)) {
mCurrentEventFrame = nsnull;
return HandleEventInternal(aEvent, aEventStatus);
}
else if (NS_IS_KEY_EVENT(aEvent)) {
// Keypress events in new blank tabs should not be completely thrown away.
// Retarget them -- the parent chrome shell might make use of them.
return RetargetEventToParent(aEvent, aEventStatus);
}
}
return rv;
}
#ifdef NS_DEBUG
void
PresShell::ShowEventTargetDebug()
{
if (nsFrame::GetShowEventTargetFrameBorder() &&
GetCurrentEventFrame()) {
if (mDrawEventTargetFrame) {
mDrawEventTargetFrame->Invalidate(
nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize()));
}
mDrawEventTargetFrame = mCurrentEventFrame;
mDrawEventTargetFrame->Invalidate(
nsRect(nsPoint(0, 0), mDrawEventTargetFrame->GetSize()));
}
}
#endif
nsresult
PresShell::HandlePositionedEvent(nsIFrame* aTargetFrame,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
nsresult rv = NS_OK;
PushCurrentEventInfo(nsnull, nsnull);
mCurrentEventFrame = aTargetFrame;
if (mCurrentEventFrame) {
nsCOMPtr<nsIContent> targetElement;
mCurrentEventFrame->GetContentForEvent(aEvent,
getter_AddRefs(targetElement));
// If there is no content for this frame, target it anyway. Some
// frames can be targeted but do not have content, particularly
// windows with scrolling off.
if (targetElement) {
// Bug 103055, bug 185889: mouse events apply to *elements*, not all
// nodes. Thus we get the nearest element parent here.
// XXX we leave the frame the same even if we find an element
// parent, so that the text frame will receive the event (selection
// and friends are the ones who care about that anyway)
//
// We use weak pointers because during this tight loop, the node
// will *not* go away. And this happens on every mousemove.
while (targetElement && !targetElement->IsElement()) {
targetElement = targetElement->GetParent();
}
// If we found an element, target it. Otherwise, target *nothing*.
if (!targetElement) {
mCurrentEventContent = nsnull;
mCurrentEventFrame = nsnull;
} else if (targetElement != mCurrentEventContent) {
mCurrentEventContent = targetElement;
}
}
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aEventStatus);
}
#ifdef NS_DEBUG
ShowEventTargetDebug();
#endif
PopCurrentEventInfo();
return rv;
}
nsresult
PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame,
nsIContent* aContent, nsEventStatus* aStatus)
{
PushCurrentEventInfo(aFrame, aContent);
nsresult rv = HandleEventInternal(aEvent, aStatus);
PopCurrentEventInfo();
return rv;
}
static inline bool
IsSynthesizedMouseEvent(nsEvent* aEvent)
{
return aEvent->eventStructType == NS_MOUSE_EVENT &&
static_cast<nsMouseEvent*>(aEvent)->reason != nsMouseEvent::eReal;
}
static bool CanHandleContextMenuEvent(nsMouseEvent* aMouseEvent,
nsIFrame* aFrame)
{
#if defined(XP_MACOSX) && defined(MOZ_XUL)
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsIFrame* popupFrame = pm->GetTopPopup(ePopupTypeMenu);
if (popupFrame) {
// context menus should not be opened while another menu is open on Mac,
// so return false so that the event is not fired.
if (aMouseEvent->context == nsMouseEvent::eContextMenuKey) {
return false;
} else if (aMouseEvent->widget) {
nsWindowType windowType;
aMouseEvent->widget->GetWindowType(windowType);
if (windowType == eWindowType_popup) {
for (nsIFrame* current = aFrame; current;
current = nsLayoutUtils::GetCrossDocParentFrame(current)) {
if (current->GetType() == nsGkAtoms::menuPopupFrame) {
return false;
}
}
}
}
}
}
#endif
return true;
}
static bool
IsFullScreenAndRestrictedKeyEvent(nsIContent* aTarget, const nsEvent* aEvent)
{
NS_ABORT_IF_FALSE(aEvent, "Must have an event to check.");
// Bail out if the event is not a key event, or the target's document is
// not in DOM full screen mode, or full-screen key input is not restricted.
nsIDocument *root = nsnull;
if (!aTarget ||
(aEvent->message != NS_KEY_DOWN &&
aEvent->message != NS_KEY_UP &&
aEvent->message != NS_KEY_PRESS) ||
!(root = nsContentUtils::GetRootDocument(aTarget->OwnerDoc())) ||
!root->IsFullScreenDoc() ||
!nsContentUtils::IsFullScreenKeyInputRestricted()) {
return false;
}
// We're in full-screen mode. We whitelist key codes, and we will
// show a warning when keys not in this list are pressed.
const nsKeyEvent* keyEvent = static_cast<const nsKeyEvent*>(aEvent);
int key = keyEvent->keyCode ? keyEvent->keyCode : keyEvent->charCode;
switch (key) {
case NS_VK_TAB:
case NS_VK_SPACE:
case NS_VK_PAGE_UP:
case NS_VK_PAGE_DOWN:
case NS_VK_END:
case NS_VK_HOME:
case NS_VK_LEFT:
case NS_VK_UP:
case NS_VK_RIGHT:
case NS_VK_DOWN:
case NS_VK_SHIFT:
case NS_VK_CONTROL:
case NS_VK_ALT:
case NS_VK_META:
#ifdef XP_WIN
case VK_VOLUME_MUTE:
case VK_VOLUME_DOWN:
case VK_VOLUME_UP:
#endif
// Unrestricted key code.
return false;
default:
// Otherwise, fullscreen is enabled, key input is restricted, and the key
// code is not an allowed key code.
return true;
}
}
nsresult
PresShell::HandleEventInternal(nsEvent* aEvent, nsEventStatus* aStatus)
{
NS_TIME_FUNCTION_MIN(1.0);
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT)
{
nsAccessibleEvent *accEvent = static_cast<nsAccessibleEvent*>(aEvent);
accEvent->mAccessible = nsnull;
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container) {
// This presshell is not active. This often happens when a
// preshell is being held onto for fastback.
return NS_OK;
}
// Accessible creation might be not safe so we make sure it's not created
// at unsafe times.
accEvent->mAccessible =
accService->GetRootDocumentAccessible(this, nsContentUtils::IsSafeToRunScript());
return NS_OK;
}
}
#endif
nsRefPtr<nsEventStateManager> manager = mPresContext->EventStateManager();
nsresult rv = NS_OK;
if (!NS_EVENT_NEEDS_FRAME(aEvent) || GetCurrentEventFrame()) {
#ifdef MOZ_TOUCH
bool touchIsNew = false;
#endif
bool isHandlingUserInput = false;
// XXX How about IME events and input events for plugins?
if (NS_IS_TRUSTED_EVENT(aEvent)) {
switch (aEvent->message) {
case NS_KEY_PRESS:
case NS_KEY_DOWN:
case NS_KEY_UP: {
nsIDocument *doc = mCurrentEventContent ?
mCurrentEventContent->OwnerDoc() : nsnull;
nsIDocument* root = nsnull;
if (static_cast<const nsKeyEvent*>(aEvent)->keyCode == NS_VK_ESCAPE &&
(root = nsContentUtils::GetRootDocument(doc)) &&
root->IsFullScreenDoc()) {
// Prevent default action on ESC key press when exiting
// DOM full-screen mode. This prevents the browser ESC key
// handler from stopping all loads in the document, which
// would cause <video> loads to stop.
aEvent->flags |= (NS_EVENT_FLAG_NO_DEFAULT |
NS_EVENT_FLAG_ONLY_CHROME_DISPATCH);
if (aEvent->message == NS_KEY_UP) {
// ESC key released while in DOM full-screen mode.
// Exit full-screen mode.
nsIDocument::ExitFullScreen(true);
}
} else if (IsFullScreenAndRestrictedKeyEvent(mCurrentEventContent, aEvent)) {
// Restricted key press while in DOM full-screen mode. Dispatch
// an event to chrome so it knows to show a warning message
// informing the user how to exit full-screen.
nsRefPtr<nsAsyncDOMEvent> e =
new nsAsyncDOMEvent(doc, NS_LITERAL_STRING("MozShowFullScreenWarning"),
true, true);
e->PostDOMEvent();
}
// Else not full-screen mode or key code is unrestricted, fall
// through to normal handling.
}
case NS_MOUSE_BUTTON_DOWN:
case NS_MOUSE_BUTTON_UP:
isHandlingUserInput = true;
break;
#ifdef MOZ_TOUCH
case NS_TOUCH_CANCEL:
case NS_TOUCH_END: {
// Remove the changed touches
// need to make sure we only remove touches that are ending here
nsTouchEvent* touchEvent = static_cast<nsTouchEvent*>(aEvent);
nsTArray<nsCOMPtr<nsIDOMTouch> > &touches = touchEvent->touches;
for (PRUint32 i = 0; i < touches.Length(); ++i) {
nsIDOMTouch *touch = touches[i];
nsDOMTouch *domtouch = static_cast<nsDOMTouch*>(touch);
if (!touch) {
continue;
}
touch->mMessage = aEvent->message;
touch->mChanged = true;
nsCOMPtr<nsIDOMTouch> oldTouch;
PRInt32 id;
touch->GetIdentifier(&id);
gCaptureTouchList.Get(id, getter_AddRefs(oldTouch));
if (!oldTouch) {
continue;
}
nsCOMPtr<nsPIDOMEventTarget> targetPtr;
oldTouch->GetTarget(getter_AddRefs(targetPtr));
mCurrentEventContent = do_QueryInterface(targetPtr);
domtouch->SetTarget(targetPtr);
gCaptureTouchList.Remove(id);
}
// add any touches left in the touch list, but ensure changed=false
gCaptureTouchList.Enumerate(&AppendToTouchList, (void *)&touches);
break;
}
case NS_TOUCH_MOVE: {
// Check for touches that changed. Mark them add to queue
nsTouchEvent* touchEvent = static_cast<nsTouchEvent*>(aEvent);
nsTArray<nsCOMPtr<nsIDOMTouch> > touches = touchEvent->touches;
bool haveChanged = false;
for (PRUint32 i = 0; i < touches.Length(); ++i) {
nsIDOMTouch *touch = touches[i];
nsDOMTouch *domtouch = static_cast<nsDOMTouch*>(touch);
if (!touch) {
continue;
}
PRInt32 id;
touch->GetIdentifier(&id);
touch->mMessage = aEvent->message;
nsCOMPtr<nsIDOMTouch> oldTouch;
gCaptureTouchList.Get(id, getter_AddRefs(oldTouch));
if (!oldTouch) {
continue;
}
if(domtouch->Equals(oldTouch)) {
touch->mChanged = true;
haveChanged = true;
}
nsCOMPtr<nsPIDOMEventTarget> targetPtr;
oldTouch->GetTarget(getter_AddRefs(targetPtr));
domtouch->SetTarget(targetPtr);
gCaptureTouchList.Put(id, touch);
// if we're moving from touchstart to touchmove for this touch
// we allow preventDefault to prevent mouse events
if (oldTouch->mMessage != touch->mMessage) {
touchIsNew = true;
}
}
// is nothing has changed, we should just return
if (!haveChanged) {
return NS_OK;
}
break;
}
#endif
case NS_DRAGDROP_DROP:
nsCOMPtr<nsIDragSession> session = nsContentUtils::GetDragSession();
if (session) {
bool onlyChromeDrop = false;
session->GetOnlyChromeDrop(&onlyChromeDrop);
if (onlyChromeDrop) {
aEvent->flags |= NS_EVENT_FLAG_ONLY_CHROME_DISPATCH;
}
}
break;
}
}
if (aEvent->message == NS_CONTEXTMENU) {
nsMouseEvent* me = static_cast<nsMouseEvent*>(aEvent);
if (!CanHandleContextMenuEvent(me, GetCurrentEventFrame())) {
return NS_OK;
}
if (me->context == nsMouseEvent::eContextMenuKey &&
!AdjustContextMenuKeyEvent(me)) {
return NS_OK;
}
if (me->isShift)
aEvent->flags |= NS_EVENT_FLAG_ONLY_CHROME_DISPATCH |
NS_EVENT_RETARGET_TO_NON_NATIVE_ANONYMOUS;
}
nsAutoHandlingUserInputStatePusher userInpStatePusher(isHandlingUserInput,
aEvent, mDocument);
if (NS_IS_TRUSTED_EVENT(aEvent) && aEvent->message == NS_MOUSE_MOVE) {
nsIPresShell::AllowMouseCapture(
nsEventStateManager::GetActiveEventStateManager() == manager);
}
nsAutoPopupStatePusher popupStatePusher(nsDOMEvent::GetEventPopupControlState(aEvent));
// FIXME. If the event was reused, we need to clear the old target,
// bug 329430
aEvent->target = nsnull;
// 1. Give event to event manager for pre event state changes and
// generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame, aStatus);
// 2. Give event to the DOM for third party and JS use.
if (GetCurrentEventFrame() && NS_SUCCEEDED(rv)) {
bool wasHandlingKeyBoardEvent =
nsContentUtils::IsHandlingKeyBoardEvent();
if (aEvent->eventStructType == NS_KEY_EVENT) {
nsContentUtils::SetIsHandlingKeyBoardEvent(true);
}
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (PreHandleEvent above), but not mousemove DOM events.
// Synthesized button up events also do not cause DOM events
// because they do not have a reliable refPoint.
if (!IsSynthesizedMouseEvent(aEvent)) {
nsPresShellEventCB eventCB(this);
#ifdef MOZ_TOUCH
if (aEvent->eventStructType == NS_TOUCH_EVENT) {
DispatchTouchEvent(aEvent, aStatus, &eventCB, touchIsNew);
}
else if (mCurrentEventContent) {
#else
if (mCurrentEventContent) {
#endif
nsEventDispatcher::Dispatch(mCurrentEventContent, mPresContext,
aEvent, nsnull, aStatus, &eventCB);
}
else {
nsCOMPtr<nsIContent> targetContent;
rv = mCurrentEventFrame->GetContentForEvent(aEvent,
getter_AddRefs(targetContent));
if (NS_SUCCEEDED(rv) && targetContent) {
nsEventDispatcher::Dispatch(targetContent, mPresContext, aEvent,
nsnull, aStatus, &eventCB);
} else if (mDocument) {
nsEventDispatcher::Dispatch(mDocument, mPresContext, aEvent,
nsnull, aStatus, nsnull);
}
}
}
nsContentUtils::SetIsHandlingKeyBoardEvent(wasHandlingKeyBoardEvent);
// 3. Give event to event manager for post event state changes and
// generation of synthetic events.
if (!mIsDestroying && NS_SUCCEEDED(rv)) {
rv = manager->PostHandleEvent(mPresContext, aEvent,
GetCurrentEventFrame(), aStatus);
}
}
if (aEvent->message == NS_MOUSE_BUTTON_UP) {
// reset the capturing content now that the mouse button is up
SetCapturingContent(nsnull, 0);
} else if (aEvent->message == NS_MOUSE_MOVE) {
nsIPresShell::AllowMouseCapture(false);
}
}
return rv;
}
void
PresShell::DispatchTouchEvent(nsEvent *aEvent,
nsEventStatus* aStatus,
nsPresShellEventCB* aEventCB,
bool aTouchIsNew)
{
nsresult rv = NS_OK;
// calling preventDefault on touchstart or the first touchmove for a
// point prevents mouse events
bool canPrevent = aEvent->message == NS_TOUCH_START ||
(aEvent->message == NS_TOUCH_MOVE && aTouchIsNew);
bool preventDefault = false;
nsEventStatus tmpStatus = nsEventStatus_eIgnore;
nsTouchEvent* touchEvent = static_cast<nsTouchEvent*>(aEvent);
// touch events should fire on all targets
if (aEvent->message != NS_TOUCH_START) {
nsTArray<nsCOMPtr<nsIDOMTouch> > touches = touchEvent->touches;
for (PRUint32 i = 0; i < touches.Length(); ++i) {
nsIDOMTouch *touch = touches[i];
if (!touch || !touch->mChanged) {
continue;
}
// copy the event
nsCOMPtr<nsPIDOMEventTarget> targetPtr;
touch->GetTarget(getter_AddRefs(targetPtr));
if (!targetPtr) {
continue;
}
nsTouchEvent newEvent(touchEvent);
newEvent.target = targetPtr;
nsCOMPtr<nsIContent> content(do_QueryInterface(targetPtr));
nsPresContext *context = nsContentUtils::GetContextForContent(content);
if (!context) {
context = mPresContext;
}
tmpStatus = nsEventStatus_eIgnore;
nsEventDispatcher::Dispatch(targetPtr, context,
&newEvent, nsnull, &tmpStatus, aEventCB);
if (nsEventStatus_eConsumeNoDefault == tmpStatus) {
preventDefault = true;
}
}
} else {
// touchevents need to have the target attribute set on each touch
nsTArray<nsCOMPtr<nsIDOMTouch> > touches = touchEvent->touches;
for (PRUint32 i = 0; i < touches.Length(); ++i) {
nsIDOMTouch *touch = touches[i];
if (touch->mChanged) {
touch->SetTarget(mCurrentEventContent);
}
}
if (mCurrentEventContent) {
nsEventDispatcher::Dispatch(mCurrentEventContent, mPresContext,
aEvent, nsnull, &tmpStatus, aEventCB);
} else {
nsCOMPtr<nsIContent> targetContent;
rv = mCurrentEventFrame->GetContentForEvent(aEvent,
getter_AddRefs(targetContent));
if (NS_SUCCEEDED(rv) && targetContent) {
nsEventDispatcher::Dispatch(targetContent, mPresContext, aEvent,
nsnull, &tmpStatus, aEventCB);
} else if (mDocument) {
nsEventDispatcher::Dispatch(mDocument, mPresContext, aEvent,
nsnull, &tmpStatus, nsnull);
}
}
if (nsEventStatus_eConsumeNoDefault == tmpStatus) {
preventDefault = true;
}
if (touchEvent->touches.Length() == 1) {
gPreventMouseEvents = false;
}
}
// if preventDefault was called on any of the events dispatched
// and this is touchstart, or the first touchmove, widget should consume
// other events that would be associated with this touch session
if (preventDefault && canPrevent) {
gPreventMouseEvents = true;
}
if (gPreventMouseEvents) {
*aStatus = nsEventStatus_eConsumeNoDefault;
} else {
*aStatus = nsEventStatus_eIgnore;
}
}
// Dispatch event to content only (NOT full processing)
// See also HandleEventWithTarget which does full event processing.
nsresult
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent,
nsEventStatus* aStatus)
{
nsresult rv = NS_OK;
PushCurrentEventInfo(nsnull, aTargetContent);
// Bug 41013: Check if the event should be dispatched to content.
// It's possible that we are in the middle of destroying the window
// and the js context is out of date. This check detects the case
// that caused a crash in bug 41013, but there may be a better way
// to handle this situation!
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
// Dispatch event to content
rv = nsEventDispatcher::Dispatch(aTargetContent, mPresContext, aEvent, nsnull,
aStatus);
}
PopCurrentEventInfo();
return rv;
}
// See the method above.
nsresult
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsIDOMEvent* aEvent,
nsEventStatus* aStatus)
{
nsresult rv = NS_OK;
PushCurrentEventInfo(nsnull, aTargetContent);
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
rv = nsEventDispatcher::DispatchDOMEvent(aTargetContent, nsnull, aEvent,
mPresContext, aStatus);
}
PopCurrentEventInfo();
return rv;
}
bool
PresShell::AdjustContextMenuKeyEvent(nsMouseEvent* aEvent)
{
#ifdef MOZ_XUL
// if a menu is open, open the context menu relative to the active item on the menu.
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsIFrame* popupFrame = pm->GetTopPopup(ePopupTypeMenu);
if (popupFrame) {
nsIFrame* itemFrame =
(static_cast<nsMenuPopupFrame *>(popupFrame))->GetCurrentMenuItem();
if (!itemFrame)
itemFrame = popupFrame;
nsCOMPtr<nsIWidget> widget = popupFrame->GetNearestWidget();
aEvent->widget = widget;
nsIntPoint widgetPoint = widget->WidgetToScreenOffset();
aEvent->refPoint = itemFrame->GetScreenRect().BottomLeft() - widgetPoint;
mCurrentEventContent = itemFrame->GetContent();
mCurrentEventFrame = itemFrame;
return true;
}
}
#endif
// If we're here because of the key-equiv for showing context menus, we
// have to twiddle with the NS event to make sure the context menu comes
// up in the upper left of the relevant content area before we create
// the DOM event. Since we never call InitMouseEvent() on the event,
// the client X/Y will be 0,0. We can make use of that if the widget is null.
// Use the root view manager's widget since it's most likely to have one,
// and the coordinates returned by GetCurrentItemAndPositionForElement
// are relative to the widget of the root of the root view manager.
nsRootPresContext* rootPC = mPresContext->GetRootPresContext();
aEvent->refPoint.x = 0;
aEvent->refPoint.y = 0;
if (rootPC) {
rootPC->PresShell()->GetViewManager()->
GetRootWidget(getter_AddRefs(aEvent->widget));
if (aEvent->widget) {
// default the refpoint to the topleft of our document
nsPoint offset(0, 0);
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
nsIView* view = rootFrame->GetClosestView(&offset);
offset += view->GetOffsetToWidget(aEvent->widget);
aEvent->refPoint =
offset.ToNearestPixels(mPresContext->AppUnitsPerDevPixel());
}
}
} else {
aEvent->widget = nsnull;
}
// see if we should use the caret position for the popup
nsIntPoint caretPoint;
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
if (PrepareToUseCaretPosition(aEvent->widget, caretPoint)) {
// caret position is good
aEvent->refPoint = caretPoint;
return true;
}
// If we're here because of the key-equiv for showing context menus, we
// have to reset the event target to the currently focused element. Get it
// from the focus controller.
nsCOMPtr<nsIDOMElement> currentFocus;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm)
fm->GetFocusedElement(getter_AddRefs(currentFocus));
// Reset event coordinates relative to focused frame in view
if (currentFocus) {
nsCOMPtr<nsIContent> currentPointElement;
GetCurrentItemAndPositionForElement(currentFocus,
getter_AddRefs(currentPointElement),
aEvent->refPoint,
aEvent->widget);
if (currentPointElement) {
mCurrentEventContent = currentPointElement;
mCurrentEventFrame = nsnull;
GetCurrentEventFrame();
}
}
return true;
}
// PresShell::PrepareToUseCaretPosition
//
// This checks to see if we should use the caret position for popup context
// menus. Returns true if the caret position should be used, and the
// coordinates of that position is returned in aTargetPt. This function
// will also scroll the window as needed to make the caret visible.
//
// The event widget should be the widget that generated the event, and
// whose coordinate system the resulting event's refPoint should be
// relative to. The returned point is in device pixels realtive to the
// widget passed in.
bool
PresShell::PrepareToUseCaretPosition(nsIWidget* aEventWidget, nsIntPoint& aTargetPt)
{
nsresult rv;
// check caret visibility
nsRefPtr<nsCaret> caret = GetCaret();
NS_ENSURE_TRUE(caret, false);
bool caretVisible = false;
rv = caret->GetCaretVisible(&caretVisible);
if (NS_FAILED(rv) || ! caretVisible)
return false;
// caret selection, this is a temporary weak reference, so no refcounting is
// needed
nsISelection* domSelection = caret->GetCaretDOMSelection();
NS_ENSURE_TRUE(domSelection, false);
// since the match could be an anonymous textnode inside a
// <textarea> or text <input>, we need to get the outer frame
// note: frames are not refcounted
nsIFrame* frame = nsnull; // may be NULL
nsCOMPtr<nsIDOMNode> node;
rv = domSelection->GetFocusNode(getter_AddRefs(node));
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(node, false);
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (content) {
nsIContent* nonNative = content->FindFirstNonNativeAnonymous();
content = nonNative;
}
if (content) {
// It seems like ScrollSelectionIntoView should be enough, but it's
// not. The problem is that scrolling the selection into view when it is
// below the current viewport will align the top line of the frame exactly
// with the bottom of the window. This is fine, BUT, the popup event causes
// the control to be re-focused which does this exact call to
// ScrollContentIntoView, which has a one-pixel disagreement of whether the
// frame is actually in view. The result is that the frame is aligned with
// the top of the window, but the menu is still at the bottom.
//
// Doing this call first forces the frame to be in view, eliminating the
// problem. The only difference in the result is that if your cursor is in
// an edit box below the current view, you'll get the edit box aligned with
// the top of the window. This is arguably better behavior anyway.
rv = ScrollContentIntoView(content, NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE,
NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE,
SCROLL_OVERFLOW_HIDDEN);
NS_ENSURE_SUCCESS(rv, false);
frame = content->GetPrimaryFrame();
NS_WARN_IF_FALSE(frame, "No frame for focused content?");
}
// Actually scroll the selection (ie caret) into view. Note that this must
// be synchronous since we will be checking the caret position on the screen.
//
// Be easy about errors, and just don't scroll in those cases. Better to have
// the correct menu at a weird place than the wrong menu.
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
nsCOMPtr<nsISelectionController> selCon;
if (frame)
frame->GetSelectionController(GetPresContext(), getter_AddRefs(selCon));
else
selCon = static_cast<nsISelectionController *>(this);
if (selCon) {
rv = selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_SYNCHRONOUS);
NS_ENSURE_SUCCESS(rv, false);
}
nsPresContext* presContext = GetPresContext();
// get caret position relative to the closest view
nsRect caretCoords;
nsIFrame* caretFrame = caret->GetGeometry(domSelection, &caretCoords);
if (!caretFrame)
return false;
nsPoint viewOffset;
nsIView* view = caretFrame->GetClosestView(&viewOffset);
if (!view)
return false;
// and then get the caret coords relative to the event widget
if (aEventWidget) {
viewOffset += view->GetOffsetToWidget(aEventWidget);
}
caretCoords.MoveBy(viewOffset);
// caret coordinates are in app units, convert to pixels
aTargetPt.x =
presContext->AppUnitsToDevPixels(caretCoords.x + caretCoords.width);
aTargetPt.y =
presContext->AppUnitsToDevPixels(caretCoords.y + caretCoords.height);
// make sure rounding doesn't return a pixel which is outside the caret
// (e.g. one line lower)
aTargetPt.y -= 1;
return true;
}
void
PresShell::GetCurrentItemAndPositionForElement(nsIDOMElement *aCurrentEl,
nsIContent** aTargetToUse,
nsIntPoint& aTargetPt,
nsIWidget *aRootWidget)
{
nsCOMPtr<nsIContent> focusedContent(do_QueryInterface(aCurrentEl));
ScrollContentIntoView(focusedContent, NS_PRESSHELL_SCROLL_ANYWHERE,
NS_PRESSHELL_SCROLL_ANYWHERE,
SCROLL_OVERFLOW_HIDDEN);
nsPresContext* presContext = GetPresContext();
bool istree = false, checkLineHeight = true;
nscoord extraTreeY = 0;
#ifdef MOZ_XUL
// Set the position to just underneath the current item for multi-select
// lists or just underneath the selected item for single-select lists. If
// the element is not a list, or there is no selection, leave the position
// as is.
nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
nsCOMPtr<nsIDOMXULMultiSelectControlElement> multiSelect =
do_QueryInterface(aCurrentEl);
if (multiSelect) {
checkLineHeight = false;
PRInt32 currentIndex;
multiSelect->GetCurrentIndex(&currentIndex);
if (currentIndex >= 0) {
nsCOMPtr<nsIDOMXULElement> xulElement(do_QueryInterface(aCurrentEl));
if (xulElement) {
nsCOMPtr<nsIBoxObject> box;
xulElement->GetBoxObject(getter_AddRefs(box));
nsCOMPtr<nsITreeBoxObject> treeBox(do_QueryInterface(box));
// Tree view special case (tree items have no frames)
// Get the focused row and add its coordinates, which are already in pixels
// XXX Boris, should we create a new interface so that this doesn't
// need to know about trees? Something like nsINodelessChildCreator which
// could provide the current focus coordinates?
if (treeBox) {
treeBox->EnsureRowIsVisible(currentIndex);
PRInt32 firstVisibleRow, rowHeight;
treeBox->GetFirstVisibleRow(&firstVisibleRow);
treeBox->GetRowHeight(&rowHeight);
extraTreeY += presContext->CSSPixelsToAppUnits(
(currentIndex - firstVisibleRow + 1) * rowHeight);
istree = true;
nsCOMPtr<nsITreeColumns> cols;
treeBox->GetColumns(getter_AddRefs(cols));
if (cols) {
nsCOMPtr<nsITreeColumn> col;
cols->GetFirstColumn(getter_AddRefs(col));
if (col) {
nsCOMPtr<nsIDOMElement> colElement;
col->GetElement(getter_AddRefs(colElement));
nsCOMPtr<nsIContent> colContent(do_QueryInterface(colElement));
if (colContent) {
nsIFrame* frame = colContent->GetPrimaryFrame();
if (frame) {
extraTreeY += frame->GetSize().height;
}
}
}
}
}
else {
multiSelect->GetCurrentItem(getter_AddRefs(item));
}
}
}
}
else {
// don't check menulists as the selected item will be inside a popup.
nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aCurrentEl);
if (!menulist) {
nsCOMPtr<nsIDOMXULSelectControlElement> select =
do_QueryInterface(aCurrentEl);
if (select) {
checkLineHeight = false;
select->GetSelectedItem(getter_AddRefs(item));
}
}
}
if (item)
focusedContent = do_QueryInterface(item);
#endif
nsIFrame *frame = focusedContent->GetPrimaryFrame();
if (frame) {
NS_ASSERTION(frame->PresContext() == GetPresContext(),
"handling event for focused content that is not in our document?");
nsPoint frameOrigin(0, 0);
// Get the frame's origin within its view
nsIView *view = frame->GetClosestView(&frameOrigin);
NS_ASSERTION(view, "No view for frame");
// View's origin relative the widget
if (aRootWidget) {
frameOrigin += view->GetOffsetToWidget(aRootWidget);
}
// Start context menu down and to the right from top left of frame
// use the lineheight. This is a good distance to move the context
// menu away from the top left corner of the frame. If we always
// used the frame height, the context menu could end up far away,
// for example when we're focused on linked images.
// On the other hand, we want to use the frame height if it's less
// than the current line height, so that the context menu appears
// associated with the correct frame.
nscoord extra = 0;
if (!istree) {
extra = frame->GetSize().height;
if (checkLineHeight) {
nsIScrollableFrame *scrollFrame =
nsLayoutUtils::GetNearestScrollableFrame(frame);
if (scrollFrame) {
nsSize scrollAmount = scrollFrame->GetLineScrollAmount();
nsIFrame* f = do_QueryFrame(scrollFrame);
PRInt32 APD = presContext->AppUnitsPerDevPixel();
PRInt32 scrollAPD = f->PresContext()->AppUnitsPerDevPixel();
scrollAmount = scrollAmount.ConvertAppUnits(scrollAPD, APD);
if (extra > scrollAmount.height) {
extra = scrollAmount.height;
}
}
}
}
aTargetPt.x = presContext->AppUnitsToDevPixels(frameOrigin.x);
aTargetPt.y = presContext->AppUnitsToDevPixels(
frameOrigin.y + extra + extraTreeY);
}
NS_IF_ADDREF(*aTargetToUse = focusedContent);
}
bool
PresShell::ShouldIgnoreInvalidation()
{
return mPaintingSuppressed || !mIsActive;
}
void
PresShell::WillPaint(bool aWillSendDidPaint)
{
// Don't bother doing anything if some viewmanager in our tree is painting
// while we still have painting suppressed or we are not active.
if (mPaintingSuppressed || !mIsActive || !IsVisible()) {
return;
}
nsRootPresContext* rootPresContext = mPresContext->GetRootPresContext();
if (!rootPresContext) {
return;
}
if (!aWillSendDidPaint && rootPresContext == mPresContext) {
rootPresContext->UpdatePluginGeometry();
}
rootPresContext->FlushWillPaintObservers();
if (mIsDestroying)
return;
// Process reflows, if we have them, to reduce flicker due to invalidates and
// reflow being interspersed. Note that we _do_ allow this to be
// interruptible; if we can't do all the reflows it's better to flicker a bit
// than to freeze up.
FlushPendingNotifications(Flush_InterruptibleLayout);
}
void
PresShell::DidPaint()
{
if (mPaintingSuppressed || !mIsActive || !IsVisible()) {
return;
}
nsRootPresContext* rootPresContext = mPresContext->GetRootPresContext();
if (!rootPresContext) {
return;
}
if (rootPresContext == mPresContext) {
rootPresContext->UpdatePluginGeometry();
}
}
bool
PresShell::IsVisible()
{
if (!mViewManager)
return false;
nsIView* view = mViewManager->GetRootView();
if (!view)
return true;
// inner view of subdoc frame
view = view->GetParent();
if (!view)
return true;
// subdoc view
view = view->GetParent();
if (!view)
return true;
nsIFrame* frame = view->GetFrame();
if (!frame)
return true;
return frame->IsVisibleConsideringAncestors(nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY);
}
nsresult
PresShell::GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets)
{
aSheets.Clear();
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eAgentSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
nsIStyleSheet *sheet = mStyleSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (!aSheets.AppendObject(sheet))
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult
PresShell::SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets)
{
return mStyleSet->ReplaceSheets(nsStyleSet::eAgentSheet, aSheets);
}
nsresult
PresShell::AddOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->PrependStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
nsresult
PresShell::RemoveOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->RemoveStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
static void
FreezeElement(nsIContent *aContent, void * /* unused */)
{
nsIFrame *frame = aContent->GetPrimaryFrame();
nsIObjectFrame *objectFrame = do_QueryFrame(frame);
if (objectFrame) {
objectFrame->StopPlugin();
}
}
static bool
FreezeSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetShell();
if (shell)
shell->Freeze();
return true;
}
void
PresShell::Freeze()
{
MaybeReleaseCapturingContent();
mDocument->EnumerateFreezableElements(FreezeElement, nsnull);
if (mCaret) {
mCaret->SetCaretVisible(false);
}
mPaintingSuppressed = true;
if (mDocument) {
mDocument->EnumerateSubDocuments(FreezeSubDocument, nsnull);
}
nsPresContext* presContext = GetPresContext();
if (presContext &&
presContext->RefreshDriver()->PresContext() == presContext) {
presContext->RefreshDriver()->Freeze();
}
if (presContext) {
nsRootPresContext* rootPresContext = presContext->GetRootPresContext();
if (rootPresContext) {
rootPresContext->
RootForgetUpdatePluginGeometryFrameForPresContext(mPresContext);
}
}
mFrozen = true;
if (mDocument) {
UpdateImageLockingState();
}
}
void
PresShell::FireOrClearDelayedEvents(bool aFireEvents)
{
mNoDelayedMouseEvents = false;
mNoDelayedKeyEvents = false;
if (!aFireEvents) {
mDelayedEvents.Clear();
return;
}
if (mDocument) {
nsCOMPtr<nsIDocument> doc = mDocument;
while (!mIsDestroying && mDelayedEvents.Length() &&
!doc->EventHandlingSuppressed()) {
nsAutoPtr<nsDelayedEvent> ev(mDelayedEvents[0].forget());
mDelayedEvents.RemoveElementAt(0);
ev->Dispatch(this);
}
if (!doc->EventHandlingSuppressed()) {
mDelayedEvents.Clear();
}
}
}
static void
ThawElement(nsIContent *aContent, void *aShell)
{
nsCOMPtr<nsIObjectLoadingContent> objlc(do_QueryInterface(aContent));
if (objlc) {
nsRefPtr<nsNPAPIPluginInstance> inst;
objlc->EnsureInstantiation(getter_AddRefs(inst));
}
}
static bool
ThawSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetShell();
if (shell)
shell->Thaw();
return true;
}
void
PresShell::Thaw()
{
nsPresContext* presContext = GetPresContext();
if (presContext &&
presContext->RefreshDriver()->PresContext() == presContext) {
presContext->RefreshDriver()->Thaw();
}
mDocument->EnumerateFreezableElements(ThawElement, this);
if (mDocument)
mDocument->EnumerateSubDocuments(ThawSubDocument, nsnull);
// Get the activeness of our presshell, as this might have changed
// while we were in the bfcache
QueryIsActive();
// We're now unfrozen
mFrozen = false;
UpdateImageLockingState();
UnsuppressPainting();
}
//--------------------------------------------------------
// Start of protected and private methods on the PresShell
//--------------------------------------------------------
void
PresShell::MaybeScheduleReflow()
{
ASSERT_REFLOW_SCHEDULED_STATE();
if (mReflowScheduled || mIsDestroying || mIsReflowing ||
mDirtyRoots.Length() == 0)
return;
if (!mPresContext->HasPendingInterrupt() || !ScheduleReflowOffTimer()) {
ScheduleReflow();
}
ASSERT_REFLOW_SCHEDULED_STATE();
}
void
PresShell::ScheduleReflow()
{
NS_PRECONDITION(!mReflowScheduled, "Why are we trying to schedule a reflow?");
ASSERT_REFLOW_SCHEDULED_STATE();
if (GetPresContext()->RefreshDriver()->AddLayoutFlushObserver(this)) {
mReflowScheduled = true;
}
ASSERT_REFLOW_SCHEDULED_STATE();
}
nsresult
PresShell::DidCauseReflow()
{
NS_ASSERTION(mChangeNestCount != 0, "Unexpected call to DidCauseReflow()");
--mChangeNestCount;
nsContentUtils::RemoveScriptBlocker();
return NS_OK;
}
void
PresShell::WillDoReflow()
{
// We just reflowed, tell the caret that its frame might have moved.
// XXXbz that comment makes no sense
if (mCaret) {
mCaret->InvalidateOutsideCaret();
}
mPresContext->FlushUserFontSet();
mFrameConstructor->BeginUpdate();
}
void
PresShell::DidDoReflow(bool aInterruptible)
{
mFrameConstructor->EndUpdate();
HandlePostedReflowCallbacks(aInterruptible);
if (sSynthMouseMove) {
SynthesizeMouseMove(false);
}
if (mCaret) {
// Update the caret's position now to account for any changes created by
// the reflow.
mCaret->InvalidateOutsideCaret();
mCaret->UpdateCaretPosition();
}
}
static PLDHashOperator
MarkFramesDirtyToRoot(nsPtrHashKey<nsIFrame>* p, void* closure)
{
nsIFrame* target = static_cast<nsIFrame*>(closure);
for (nsIFrame* f = p->GetKey(); f && !NS_SUBTREE_DIRTY(f);
f = f->GetParent()) {
f->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
if (f == target) {
break;
}
}
return PL_DHASH_NEXT;
}
void
PresShell::sReflowContinueCallback(nsITimer* aTimer, void* aPresShell)
{
nsRefPtr<PresShell> self = static_cast<PresShell*>(aPresShell);
NS_PRECONDITION(aTimer == self->mReflowContinueTimer, "Unexpected timer");
self->mReflowContinueTimer = nsnull;
self->ScheduleReflow();
}
bool
PresShell::ScheduleReflowOffTimer()
{
NS_PRECONDITION(!mReflowScheduled, "Shouldn't get here");
ASSERT_REFLOW_SCHEDULED_STATE();
if (!mReflowContinueTimer) {
mReflowContinueTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mReflowContinueTimer ||
NS_FAILED(mReflowContinueTimer->
InitWithFuncCallback(sReflowContinueCallback, this, 30,
nsITimer::TYPE_ONE_SHOT))) {
return false;
}
}
return true;
}
bool
PresShell::DoReflow(nsIFrame* target, bool aInterruptible)
{
NS_TIME_FUNCTION_WITH_DOCURL;
SAMPLE_LABEL("layout", "DoReflow");
if (mReflowContinueTimer) {
mReflowContinueTimer->Cancel();
mReflowContinueTimer = nsnull;
}
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
nsRefPtr<nsRenderingContext> rcx = GetReferenceRenderingContext();
if (!rcx) {
NS_NOTREACHED("CreateRenderingContext failure");
return false;
}
NS_ASSERTION(!mPresContext->mCurrentInflationContainer,
"current inflation container should be null");
AutoRestore<nsIFrame*> restoreInflationContainer(mPresContext->
mCurrentInflationContainer);
for (nsIFrame *f = target->GetParent(); f; f = f->GetParent()) {
if (nsLayoutUtils::IsContainerForFontSizeInflation(f)) {
NS_ASSERTION(!(f->GetStateBits() & NS_FRAME_IN_REFLOW),
"a frame outside should not be in reflow");
mPresContext->mCurrentInflationContainer = f;
mPresContext->mCurrentInflationContainerWidth = f->GetContentRect().width;
break;
}
}
#ifdef DEBUG
mCurrentReflowRoot = target;
#endif
target->WillReflow(mPresContext);
// If the target frame is the root of the frame hierarchy, then
// use all the available space. If it's simply a `reflow root',
// then use the target frame's size as the available space.
nsSize size;
if (target == rootFrame) {
size = mPresContext->GetVisibleArea().Size();
// target->GetRect() has the old size of the frame,
// mPresContext->GetVisibleArea() has the new size.
target->InvalidateRectDifference(mPresContext->GetVisibleArea(),
target->GetRect());
} else {
size = target->GetSize();
}
NS_ASSERTION(!target->GetNextInFlow() && !target->GetPrevInFlow(),
"reflow roots should never split");
// Don't pass size directly to the reflow state, since a
// constrained height implies page/column breaking.
nsSize reflowSize(size.width, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState reflowState(mPresContext, target, rcx, reflowSize);
if (rootFrame == target) {
// When the root frame is being reflowed with unconstrained height
// (which happens when we're called from
// DocumentViewerImpl::SizeToContent), we're effectively doing a
// vertical resize, since it changes the meaning of percentage
// heights even if no heights actually changed. The same applies
// when we reflow again after that computation. This is an unusual
// case, and isn't caught by nsHTMLReflowState::InitResizeFlags.
bool hasUnconstrainedHeight = size.height == NS_UNCONSTRAINEDSIZE;
if (hasUnconstrainedHeight || mLastRootReflowHadUnconstrainedHeight) {
reflowState.mFlags.mVResize = true;
}
mLastRootReflowHadUnconstrainedHeight = hasUnconstrainedHeight;
}
// fix the computed height
NS_ASSERTION(reflowState.mComputedMargin == nsMargin(0, 0, 0, 0),
"reflow state should not set margin for reflow roots");
if (size.height != NS_UNCONSTRAINEDSIZE) {
nscoord computedHeight =
size.height - reflowState.mComputedBorderPadding.TopBottom();
computedHeight = NS_MAX(computedHeight, 0);
reflowState.SetComputedHeight(computedHeight);
}
NS_ASSERTION(reflowState.ComputedWidth() ==
size.width -
reflowState.mComputedBorderPadding.LeftRight(),
"reflow state computed incorrect width");
mPresContext->ReflowStarted(aInterruptible);
mIsReflowing = true;
nsReflowStatus status;
nsHTMLReflowMetrics desiredSize;
target->Reflow(mPresContext, desiredSize, reflowState, status);
// If an incremental reflow is initiated at a frame other than the
// root frame, then its desired size had better not change! If it's
// initiated at the root, then the size better not change unless its
// height was unconstrained to start with.
nsRect boundsRelativeToTarget = nsRect(0, 0, desiredSize.width, desiredSize.height);
NS_ASSERTION((target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) ||
(desiredSize.width == size.width &&
desiredSize.height == size.height),
"non-root frame's desired size changed during an "
"incremental reflow");
NS_ASSERTION(target == rootFrame ||
desiredSize.VisualOverflow().IsEqualInterior(boundsRelativeToTarget),
"non-root reflow roots must not have visible overflow");
NS_ASSERTION(target == rootFrame ||
desiredSize.ScrollableOverflow().IsEqualEdges(boundsRelativeToTarget),
"non-root reflow roots must not have scrollable overflow");
NS_ASSERTION(status == NS_FRAME_COMPLETE,
"reflow roots should never split");
target->SetSize(boundsRelativeToTarget.Size());
// Always use boundsRelativeToTarget here, not desiredSize.GetVisualOverflowArea(),
// because for root frames (where they could be different, since root frames
// are allowed to have overflow) the root view bounds need to match the
// viewport bounds; the view manager "window dimensions" code depends on it.
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, target,
target->GetView(),
boundsRelativeToTarget);
nsContainerFrame::SyncWindowProperties(mPresContext, target,
target->GetView());
target->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
if (target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) {
mPresContext->SetVisibleArea(boundsRelativeToTarget);
}
#ifdef DEBUG
mCurrentReflowRoot = nsnull;
#endif
NS_ASSERTION(mPresContext->HasPendingInterrupt() ||
mFramesToDirty.Count() == 0,
"Why do we need to dirty anything if not interrupted?");
mIsReflowing = false;
bool interrupted = mPresContext->HasPendingInterrupt();
if (interrupted) {
// Make sure target gets reflowed again.
mFramesToDirty.EnumerateEntries(&MarkFramesDirtyToRoot, target);
NS_ASSERTION(NS_SUBTREE_DIRTY(target), "Why is the target not dirty?");
mDirtyRoots.AppendElement(target);
mDocument->SetNeedLayoutFlush();
// Clear mFramesToDirty after we've done the NS_SUBTREE_DIRTY(target)
// assertion so that if it fails it's easier to see what's going on.
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("mFramesToDirty.Count() == %u\n", mFramesToDirty.Count());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
mFramesToDirty.Clear();
// Any FlushPendingNotifications with interruptible reflows
// should be suppressed now. We don't want to do extra reflow work
// before our reflow event happens.
mSuppressInterruptibleReflows = true;
MaybeScheduleReflow();
}
nsRootPresContext* rootPC = mPresContext->GetRootPresContext();
if (rootPC) {
rootPC->RequestUpdatePluginGeometry(target);
}
return !interrupted;
}
#ifdef DEBUG
void
PresShell::DoVerifyReflow()
{
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
nsIView* rootView = mViewManager->GetRootView();
mViewManager->InvalidateView(rootView);
FlushPendingNotifications(Flush_Layout);
mInVerifyReflow = true;
bool ok = VerifyIncrementalReflow();
mInVerifyReflow = false;
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: finished (%s)\n",
ok ? "ok" : "failed");
}
if (!mDirtyRoots.IsEmpty()) {
printf("XXX yikes! reflow commands queued during verify-reflow\n");
}
}
}
#endif
bool
PresShell::ProcessReflowCommands(bool aInterruptible)
{
if (mDirtyRoots.IsEmpty() && !mShouldUnsuppressPainting) {
// Nothing to do; bail out
return true;
}
NS_TIME_FUNCTION_WITH_DOCURL;
mozilla::TimeStamp timerStart = mozilla::TimeStamp::Now();
bool interrupted = false;
if (!mDirtyRoots.IsEmpty()) {
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("ProcessReflowCommands: begin incremental reflow\n");
}
#endif
// If reflow is interruptible, then make a note of our deadline.
const PRIntervalTime deadline = aInterruptible
? PR_IntervalNow() + PR_MicrosecondsToInterval(gMaxRCProcessingTime)
: (PRIntervalTime)0;
// Scope for the reflow entry point
{
nsAutoScriptBlocker scriptBlocker;
WillDoReflow();
AUTO_LAYOUT_PHASE_ENTRY_POINT(GetPresContext(), Reflow);
nsIViewManager::AutoDisableRefresh refreshBlocker(mViewManager);
do {
// Send an incremental reflow notification to the target frame.
PRInt32 idx = mDirtyRoots.Length() - 1;
nsIFrame *target = mDirtyRoots[idx];
mDirtyRoots.RemoveElementAt(idx);
if (!NS_SUBTREE_DIRTY(target)) {
// It's not dirty anymore, which probably means the notification
// was posted in the middle of a reflow (perhaps with a reflow
// root in the middle). Don't do anything.
continue;
}
interrupted = !DoReflow(target, aInterruptible);
// Keep going until we're out of reflow commands, or we've run
// past our deadline, or we're interrupted.
} while (!interrupted && !mDirtyRoots.IsEmpty() &&
(!aInterruptible || PR_IntervalNow() < deadline));
interrupted = !mDirtyRoots.IsEmpty();
}
// Exiting the scriptblocker might have killed us
if (!mIsDestroying) {
DidDoReflow(aInterruptible);
}
// DidDoReflow might have killed us
if (!mIsDestroying) {
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n",
(void*)this);
}
DoVerifyReflow();
#endif
// If any new reflow commands were enqueued during the reflow, schedule
// another reflow event to process them. Note that we want to do this
// after DidDoReflow(), since that method can change whether there are
// dirty roots around by flushing, and there's no point in posting a
// reflow event just to have the flush revoke it.
if (!mDirtyRoots.IsEmpty()) {
MaybeScheduleReflow();
// And tell our document that we might need flushing
mDocument->SetNeedLayoutFlush();
}
}
}
if (!mIsDestroying && mShouldUnsuppressPainting &&
mDirtyRoots.IsEmpty()) {
// We only unlock if we're out of reflows. It's pointless
// to unlock if reflows are still pending, since reflows
// are just going to thrash the frames around some more. By
// waiting we avoid an overeager "jitter" effect.
mShouldUnsuppressPainting = false;
UnsuppressAndInvalidate();
}
if (mDocument->GetRootElement()) {
Telemetry::ID id = (mDocument->GetRootElement()->IsXUL()
? Telemetry::XUL_REFLOW_MS : Telemetry::HTML_REFLOW_MS);
Telemetry::AccumulateTimeDelta(id, timerStart);
}
return !interrupted;
}
#ifdef MOZ_XUL
/*
* It's better to add stuff to the |DidSetStyleContext| method of the
* relevant frames than adding it here. These methods should (ideally,
* anyway) go away.
*/
// Return value says whether to walk children.
typedef bool (* frameWalkerFn)(nsIFrame *aFrame, void *aClosure);
static bool
ReResolveMenusAndTrees(nsIFrame *aFrame, void *aClosure)
{
// Trees have a special style cache that needs to be flushed when
// the theme changes.
nsTreeBodyFrame *treeBody = do_QueryFrame(aFrame);
if (treeBody)
treeBody->ClearStyleAndImageCaches();
// We deliberately don't re-resolve style on a menu's popup
// sub-content, since doing so slows menus to a crawl. That means we
// have to special-case them on a skin switch, and ensure that the
// popup frames just get destroyed completely.
if (aFrame && aFrame->GetType() == nsGkAtoms::menuFrame)
(static_cast<nsMenuFrame *>(aFrame))->CloseMenu(true);
return true;
}
static bool
ReframeImageBoxes(nsIFrame *aFrame, void *aClosure)
{
nsStyleChangeList *list = static_cast<nsStyleChangeList*>(aClosure);
if (aFrame->GetType() == nsGkAtoms::imageBoxFrame) {
list->AppendChange(aFrame, aFrame->GetContent(),
NS_STYLE_HINT_FRAMECHANGE);
return false; // don't walk descendants
}
return true; // walk descendants
}
static void
WalkFramesThroughPlaceholders(nsPresContext *aPresContext, nsIFrame *aFrame,
frameWalkerFn aFunc, void *aClosure)
{
bool walkChildren = (*aFunc)(aFrame, aClosure);
if (!walkChildren)
return;
nsIFrame::ChildListIterator lists(aFrame);
for (; !lists.IsDone(); lists.Next()) {
nsFrameList::Enumerator childFrames(lists.CurrentList());
for (; !childFrames.AtEnd(); childFrames.Next()) {
nsIFrame* child = childFrames.get();
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow, and recur through the
// out-of-flows of placeholders.
WalkFramesThroughPlaceholders(aPresContext,
nsPlaceholderFrame::GetRealFrameFor(child),
aFunc, aClosure);
}
}
}
}
#endif
NS_IMETHODIMP
PresShell::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
#ifdef MOZ_XUL
if (!nsCRT::strcmp(aTopic, "chrome-flush-skin-caches")) {
nsIFrame *rootFrame = FrameManager()->GetRootFrame();
// Need to null-check because "chrome-flush-skin-caches" can happen
// at interesting times during startup.
if (rootFrame) {
NS_ASSERTION(mViewManager, "View manager must exist");
nsWeakFrame weakRoot(rootFrame);
// Have to make sure that the content notifications are flushed before we
// start messing with the frame model; otherwise we can get content doubling.
mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
if (weakRoot.IsAlive()) {
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
&ReResolveMenusAndTrees, nsnull);
// Because "chrome:" URL equality is messy, reframe image box
// frames (hack!).
nsStyleChangeList changeList;
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
ReframeImageBoxes, &changeList);
// Mark ourselves as not safe to flush while we're doing frame
// construction.
{
nsAutoScriptBlocker scriptBlocker;
++mChangeNestCount;
mFrameConstructor->ProcessRestyledFrames(changeList);
--mChangeNestCount;
}
}
}
return NS_OK;
}
#endif
if (!nsCRT::strcmp(aTopic, "agent-sheet-added") && mStyleSet) {
AddAgentSheet(aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "user-sheet-added") && mStyleSet) {
AddUserSheet(aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "agent-sheet-removed") && mStyleSet) {
RemoveSheet(nsStyleSet::eAgentSheet, aSubject);
return NS_OK;
}
if (!nsCRT::strcmp(aTopic, "user-sheet-removed") && mStyleSet) {
RemoveSheet(nsStyleSet::eUserSheet, aSubject);
return NS_OK;
}
NS_WARNING("unrecognized topic in PresShell::Observe");
return NS_ERROR_FAILURE;
}
bool
nsIPresShell::AddRefreshObserverInternal(nsARefreshObserver* aObserver,
mozFlushType aFlushType)
{
nsPresContext* presContext = GetPresContext();
return presContext ? presContext->RefreshDriver()->
AddRefreshObserver(aObserver, aFlushType) : false;
}
/* virtual */ bool
nsIPresShell::AddRefreshObserverExternal(nsARefreshObserver* aObserver,
mozFlushType aFlushType)
{
return AddRefreshObserverInternal(aObserver, aFlushType);
}
bool
nsIPresShell::RemoveRefreshObserverInternal(nsARefreshObserver* aObserver,
mozFlushType aFlushType)
{
nsPresContext* presContext = GetPresContext();
return presContext ? presContext->RefreshDriver()->
RemoveRefreshObserver(aObserver, aFlushType) : false;
}
/* virtual */ bool
nsIPresShell::RemoveRefreshObserverExternal(nsARefreshObserver* aObserver,
mozFlushType aFlushType)
{
return RemoveRefreshObserverInternal(aObserver, aFlushType);
}
//------------------------------------------------------
// End of protected and private methods on the PresShell
//------------------------------------------------------
// Start of DEBUG only code
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
nsAutoString n1, n2;
if (k1) {
k1->GetFrameName(n1);
} else {
n1.Assign(NS_LITERAL_STRING("(null)"));
}
if (k2) {
k2->GetFrameName(n2);
} else {
n2.Assign(NS_LITERAL_STRING("(null)"));
}
printf("verifyreflow: %s %p != %s %p %s\n",
NS_LossyConvertUTF16toASCII(n1).get(), (void*)k1,
NS_LossyConvertUTF16toASCII(n2).get(), (void*)k2, aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsRect& r1, const nsRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
if (k1) {
k1->GetFrameName(name);
printf(" %s %p ", NS_LossyConvertUTF16toASCII(name).get(), (void*)k1);
}
printf("{%d, %d, %d, %d} != \n", r1.x, r1.y, r1.width, r1.height);
if (k2) {
k2->GetFrameName(name);
printf(" %s %p ", NS_LossyConvertUTF16toASCII(name).get(), (void*)k2);
}
printf("{%d, %d, %d, %d}\n %s\n",
r2.x, r2.y, r2.width, r2.height, aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsIntRect& r1, const nsIntRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
if (k1) {
k1->GetFrameName(name);
printf(" %s %p ", NS_LossyConvertUTF16toASCII(name).get(), (void*)k1);
}
printf("{%d, %d, %d, %d} != \n", r1.x, r1.y, r1.width, r1.height);
if (k2) {
k2->GetFrameName(name);
printf(" %s %p ", NS_LossyConvertUTF16toASCII(name).get(), (void*)k2);
}
printf("{%d, %d, %d, %d}\n %s\n",
r2.x, r2.y, r2.width, r2.height, aMsg);
}
static bool
CompareTrees(nsPresContext* aFirstPresContext, nsIFrame* aFirstFrame,
nsPresContext* aSecondPresContext, nsIFrame* aSecondFrame)
{
if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame)
return true;
// XXX Evil hack to reduce false positives; I can't seem to figure
// out how to flush scrollbar changes correctly
//if (aFirstFrame->GetType() == nsGkAtoms::scrollbarFrame)
// return true;
bool ok = true;
nsIFrame::ChildListIterator lists1(aFirstFrame);
nsIFrame::ChildListIterator lists2(aSecondFrame);
do {
const nsFrameList& kids1 = !lists1.IsDone() ? lists1.CurrentList() : nsFrameList();
const nsFrameList& kids2 = !lists2.IsDone() ? lists2.CurrentList() : nsFrameList();
PRInt32 l1 = kids1.GetLength();
PRInt32 l2 = kids2.GetLength();;
if (l1 != l2) {
ok = false;
LogVerifyMessage(kids1.FirstChild(), kids2.FirstChild(),
"child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
nsIntRect r1, r2;
nsIView* v1, *v2;
for (nsFrameList::Enumerator e1(kids1), e2(kids2);
;
e1.Next(), e2.Next()) {
nsIFrame* k1 = e1.get();
nsIFrame* k2 = e2.get();
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
ok = false;
LogVerifyMessage(k1, k2, "child lists are different\n");
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
if (!k1->GetRect().IsEqualInterior(k2->GetRect())) {
ok = false;
LogVerifyMessage(k1, k2, "(frame rects)", k1->GetRect(), k2->GetRect());
}
// Make sure either both have views or neither have views; if they
// do have views, make sure the views are the same size. If the
// views have widgets, make sure they both do or neither does. If
// they do, make sure the widgets are the same size.
v1 = k1->GetView();
v2 = k2->GetView();
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
ok = false;
LogVerifyMessage(k1, k2, "child views are not matched\n");
}
else if (nsnull != v1) {
if (!v1->GetBounds().IsEqualInterior(v2->GetBounds())) {
LogVerifyMessage(k1, k2, "(view rects)", v1->GetBounds(), v2->GetBounds());
}
nsIWidget* w1 = v1->GetWidget();
nsIWidget* w2 = v2->GetWidget();
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
ok = false;
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (!r1.IsEqualEdges(r2)) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
}
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
// XXX Should perhaps compare their float managers.
// Compare the sub-trees too
if (!CompareTrees(aFirstPresContext, k1, aSecondPresContext, k2)) {
ok = false;
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
}
else {
break;
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
lists1.Next();
lists2.Next();
if (lists1.IsDone() != lists2.IsDone() ||
(!lists1.IsDone() && lists1.CurrentID() != lists2.CurrentID())) {
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
ok = false;
}
LogVerifyMessage(kids1.FirstChild(), kids2.FirstChild(),
"child list names are not matched: ");
fprintf(stdout, "%s != %s\n",
!lists1.IsDone() ? mozilla::layout::ChildListName(lists1.CurrentID()) : "(null)",
!lists2.IsDone() ? mozilla::layout::ChildListName(lists2.CurrentID()) : "(null)");
break;
}
} while (ok && !lists1.IsDone());
return ok;
}
#endif
#if 0
static nsIFrame*
FindTopFrame(nsIFrame* aRoot)
{
if (aRoot) {
nsIContent* content = aRoot->GetContent();
if (content) {
nsIAtom* tag;
content->GetTag(tag);
if (nsnull != tag) {
NS_RELEASE(tag);
return aRoot;
}
}
// Try one of the children
nsIFrame* kid = aRoot->GetFirstPrincipalChild();
while (nsnull != kid) {
nsIFrame* result = FindTopFrame(kid);
if (nsnull != result) {
return result;
}
kid = kid->GetNextSibling();
}
}
return nsnull;
}
#endif
#ifdef DEBUG
nsStyleSet*
PresShell::CloneStyleSet(nsStyleSet* aSet)
{
nsStyleSet *clone = new nsStyleSet();
PRInt32 i, n = aSet->SheetCount(nsStyleSet::eOverrideSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eOverrideSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eOverrideSheet, ss);
}
// The document expects to insert document stylesheets itself
#if 0
n = aSet->SheetCount(nsStyleSet::eDocSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eDocSheet, i);
if (ss)
clone->AddDocStyleSheet(ss, mDocument);
}
#endif
n = aSet->SheetCount(nsStyleSet::eUserSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eUserSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eUserSheet, ss);
}
n = aSet->SheetCount(nsStyleSet::eAgentSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eAgentSheet, ss);
}
return clone;
}
#ifdef DEBUG_Eli
static nsresult
DumpToPNG(nsIPresShell* shell, nsAString& name) {
PRInt32 width=1000, height=1000;
nsRect r(0, 0, shell->GetPresContext()->DevPixelsToAppUnits(width),
shell->GetPresContext()->DevPixelsToAppUnits(height));
nsRefPtr<gfxImageSurface> imgSurface =
new gfxImageSurface(gfxIntSize(width, height),
gfxImageSurface::ImageFormatARGB32);
nsRefPtr<gfxContext> imgContext = new gfxContext(imgSurface);
nsRefPtr<gfxASurface> surface =
gfxPlatform::GetPlatform()->
CreateOffscreenSurface(gfxIntSize(width, height),
gfxASurface::ContentFromFormat(gfxASurface::ImageFormatARGB32));
NS_ENSURE_TRUE(surface, NS_ERROR_OUT_OF_MEMORY);
nsRefPtr<gfxContext> context = new gfxContext(surface);
shell->RenderDocument(r, 0, NS_RGB(255, 255, 0), context);
imgContext->DrawSurface(surface, gfxSize(width, height));
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance("@mozilla.org/image/encoder;2?type=image/png");
NS_ENSURE_TRUE(encoder, NS_ERROR_FAILURE);
encoder->InitFromData(imgSurface->Data(), imgSurface->Stride() * height,
width, height, imgSurface->Stride(),
imgIEncoder::INPUT_FORMAT_HOSTARGB, EmptyString());
// XXX not sure if this is the right way to write to a file
nsCOMPtr<nsILocalFile> file = do_CreateInstance("@mozilla.org/file/local;1");
NS_ENSURE_TRUE(file, NS_ERROR_FAILURE);
rv = file->InitWithPath(name);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 length;
encoder->Available(&length);
nsCOMPtr<nsIOutputStream> outputStream;
rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), file);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIOutputStream> bufferedOutputStream;
rv = NS_NewBufferedOutputStream(getter_AddRefs(bufferedOutputStream),
outputStream, length);
PRUint32 numWritten;
rv = bufferedOutputStream->WriteFrom(encoder, length, &numWritten);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
#endif
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
bool
PresShell::VerifyIncrementalReflow()
{
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Building Verification Tree...\n");
}
// Create a presentation context to view the new frame tree
nsRefPtr<nsPresContext> cx =
new nsRootPresContext(mDocument, mPresContext->IsPaginated() ?
nsPresContext::eContext_PrintPreview :
nsPresContext::eContext_Galley);
NS_ENSURE_TRUE(cx, false);
nsDeviceContext *dc = mPresContext->DeviceContext();
nsresult rv = cx->Init(dc);
NS_ENSURE_SUCCESS(rv, false);
// Get our scrolling preference
nsIView* rootView = mViewManager->GetRootView();
NS_ENSURE_TRUE(rootView->HasWidget(), false);
nsIWidget* parentWidget = rootView->GetWidget();
// Create a new view manager.
nsCOMPtr<nsIViewManager> vm = do_CreateInstance(kViewManagerCID);
NS_ENSURE_TRUE(vm, false);
rv = vm->Init(dc);
NS_ENSURE_SUCCESS(rv, false);
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds = mPresContext->GetVisibleArea();
nsIView* view = vm->CreateView(tbounds, nsnull);
NS_ENSURE_TRUE(view, false);
//now create the widget for the view
rv = view->CreateWidgetForParent(parentWidget, nsnull, true);
NS_ENSURE_SUCCESS(rv, false);
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
// Make the new presentation context the same size as our
// presentation context.
nsRect r = mPresContext->GetVisibleArea();
cx->SetVisibleArea(r);
// Create a new presentation shell to view the document. Use the
// exact same style information that this document has.
nsAutoPtr<nsStyleSet> newSet(CloneStyleSet(mStyleSet));
nsCOMPtr<nsIPresShell> sh;
rv = mDocument->CreateShell(cx, vm, newSet, getter_AddRefs(sh));
NS_ENSURE_SUCCESS(rv, false);
newSet.forget();
// Note that after we create the shell, we must make sure to destroy it
sh->SetVerifyReflowEnable(false); // turn off verify reflow while we're reflowing the test frame tree
vm->SetPresShell(sh);
{
nsAutoCauseReflowNotifier crNotifier(this);
sh->InitialReflow(r.width, r.height);
}
mDocument->BindingManager()->ProcessAttachedQueue();
sh->FlushPendingNotifications(Flush_Layout);
sh->SetVerifyReflowEnable(true); // turn on verify reflow again now that we're done reflowing the test frame tree
// Force the non-primary presshell to unsuppress; it doesn't want to normally
// because it thinks it's hidden
((PresShell*)sh.get())->mPaintingSuppressed = false;
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Verification Tree built, comparing...\n");
}
// Now that the document has been reflowed, use its frame tree to
// compare against our frame tree.
nsIFrame* root1 = FrameManager()->GetRootFrame();
nsIFrame* root2 = sh->FrameManager()->GetRootFrame();
bool ok = CompareTrees(mPresContext, root1, cx, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
root1->List(stdout, 0);
printf("Verification tree:\n");
root2->List(stdout, 0);
}
#ifdef DEBUG_Eli
// Sample code for dumping page to png
// XXX Needs to be made more flexible
if (!ok) {
nsString stra;
static int num = 0;
stra.AppendLiteral("C:\\mozilla\\mozilla\\debug\\filea");
stra.AppendInt(num);
stra.AppendLiteral(".png");
DumpToPNG(sh, stra);
nsString strb;
strb.AppendLiteral("C:\\mozilla\\mozilla\\debug\\fileb");
strb.AppendInt(num);
strb.AppendLiteral(".png");
DumpToPNG(this, strb);
++num;
}
#endif
sh->EndObservingDocument();
sh->Destroy();
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Finished Verifying Reflow...\n");
}
return ok;
}
// Layout debugging hooks
void
PresShell::ListStyleContexts(nsIFrame *aRootFrame, FILE *out, PRInt32 aIndent)
{
nsStyleContext *sc = aRootFrame->GetStyleContext();
if (sc)
sc->List(out, aIndent);
}
void
PresShell::ListStyleSheets(FILE *out, PRInt32 aIndent)
{
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eDocSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
mStyleSet->StyleSheetAt(nsStyleSet::eDocSheet, i)->List(out, aIndent);
fputs("\n", out);
}
}
void
PresShell::VerifyStyleTree()
{
VERIFY_STYLE_TREE;
}
#endif
//=============================================================
//=============================================================
//-- Debug Reflow Counts
//=============================================================
//=============================================================
#ifdef MOZ_REFLOW_PERF
//-------------------------------------------------------------
void
PresShell::DumpReflows()
{
if (mReflowCountMgr) {
nsCAutoString uriStr;
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
uri->GetPath(uriStr);
}
}
mReflowCountMgr->DisplayTotals(uriStr.get());
mReflowCountMgr->DisplayHTMLTotals(uriStr.get());
mReflowCountMgr->DisplayDiffsInTotals("Differences");
}
}
//-------------------------------------------------------------
void
PresShell::CountReflows(const char * aName, nsIFrame * aFrame)
{
if (mReflowCountMgr) {
mReflowCountMgr->Add(aName, aFrame);
}
}
//-------------------------------------------------------------
void
PresShell::PaintCount(const char * aName,
nsRenderingContext* aRenderingContext,
nsPresContext* aPresContext,
nsIFrame * aFrame,
const nsPoint& aOffset,
PRUint32 aColor)
{
if (mReflowCountMgr) {
mReflowCountMgr->PaintCount(aName, aRenderingContext, aPresContext,
aFrame, aOffset, aColor);
}
}
//-------------------------------------------------------------
void
PresShell::SetPaintFrameCount(bool aPaintFrameCounts)
{
if (mReflowCountMgr) {
mReflowCountMgr->SetPaintFrameCounts(aPaintFrameCounts);
}
}
bool
PresShell::IsPaintingFrameCounts()
{
if (mReflowCountMgr)
return mReflowCountMgr->IsPaintingFrameCounts();
return false;
}
//------------------------------------------------------------------
//-- Reflow Counter Classes Impls
//------------------------------------------------------------------
//------------------------------------------------------------------
ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) :
mMgr(aMgr)
{
ClearTotals();
SetTotalsCache();
}
//------------------------------------------------------------------
ReflowCounter::~ReflowCounter()
{
}
//------------------------------------------------------------------
void ReflowCounter::ClearTotals()
{
mTotal = 0;
}
//------------------------------------------------------------------
void ReflowCounter::SetTotalsCache()
{
mCacheTotal = mTotal;
}
//------------------------------------------------------------------
void ReflowCounter::CalcDiffInTotals()
{
mCacheTotal = mTotal - mCacheTotal;
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(const char * aStr)
{
DisplayTotals(mTotal, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayDiffTotals(const char * aStr)
{
DisplayTotals(mCacheTotal, aStr?aStr:"Diff Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(const char * aStr)
{
DisplayHTMLTotals(mTotal, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(PRUint32 aTotal, const char * aTitle)
{
// figure total
if (aTotal == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
printf("%25s\t", aTitle);
printf("%d\t", aTotal);
if (gTots != this && aTotal > 0) {
gTots->Add(aTotal);
}
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(PRUint32 aTotal, const char * aTitle)
{
if (aTotal == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
FILE * fd = mMgr->GetOutFile();
if (!fd) {
return;
}
fprintf(fd, "<tr><td><center>%s</center></td>", aTitle);
fprintf(fd, "<td><center>%d</center></td></tr>\n", aTotal);
if (gTots != this && aTotal > 0) {
gTots->Add(aTotal);
}
}
//------------------------------------------------------------------
//-- ReflowCountMgr
//------------------------------------------------------------------
ReflowCountMgr::ReflowCountMgr()
{
mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mIndiFrameCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mCycledOnce = false;
mDumpFrameCounts = false;
mDumpFrameByFrameCounts = false;
mPaintFrameByFrameCounts = false;
}
//------------------------------------------------------------------
ReflowCountMgr::~ReflowCountMgr()
{
CleanUp();
}
//------------------------------------------------------------------
ReflowCounter * ReflowCountMgr::LookUp(const char * aName)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
return counter;
}
return nsnull;
}
//------------------------------------------------------------------
void ReflowCountMgr::Add(const char * aName, nsIFrame * aFrame)
{
NS_ASSERTION(aName != nsnull, "Name shouldn't be null!");
if (mDumpFrameCounts && nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
if (counter == nsnull) {
counter = new ReflowCounter(this);
char * name = NS_strdup(aName);
NS_ASSERTION(name != nsnull, "null ptr");
PL_HashTableAdd(mCounts, name, counter);
}
counter->Add();
}
if ((mDumpFrameByFrameCounts || mPaintFrameByFrameCounts) &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter == nsnull) {
counter = new IndiReflowCounter(this);
counter->mFrame = aFrame;
counter->mName.AssignASCII(aName);
PL_HashTableAdd(mIndiFrameCounts, key, counter);
}
// this eliminates extra counts from super classes
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
counter->mCount++;
counter->mCounter.Add(1);
}
}
}
//------------------------------------------------------------------
void ReflowCountMgr::PaintCount(const char* aName,
nsRenderingContext* aRenderingContext,
nsPresContext* aPresContext,
nsIFrame* aFrame,
const nsPoint& aOffset,
PRUint32 aColor)
{
if (mPaintFrameByFrameCounts &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter =
(IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
aRenderingContext->PushState();
aRenderingContext->Translate(aOffset);
nsFont font("Times", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0,
nsPresContext::CSSPixelsToAppUnits(11));
nsRefPtr<nsFontMetrics> fm;
aPresContext->DeviceContext()->GetMetricsFor(font,
// We have one frame, therefore we must have a root...
aPresContext->FrameManager()->GetRootFrame()->
GetStyleFont()->mLanguage,
aPresContext->GetUserFontSet(), *getter_AddRefs(fm));
aRenderingContext->SetFont(fm);
char buf[16];
sprintf(buf, "%d", counter->mCount);
nscoord x = 0, y = fm->MaxAscent();
nscoord width, height = fm->MaxHeight();
aRenderingContext->SetTextRunRTL(false);
width = aRenderingContext->GetWidth(buf);
PRUint32 color;
PRUint32 color2;
if (aColor != 0) {
color = aColor;
color2 = NS_RGB(0,0,0);
} else {
PRUint8 rc = 0, gc = 0, bc = 0;
if (counter->mCount < 5) {
rc = 255;
gc = 255;
} else if ( counter->mCount < 11) {
gc = 255;
} else {
rc = 255;
}
color = NS_RGB(rc,gc,bc);
color2 = NS_RGB(rc/2,gc/2,bc/2);
}
nsRect rect(0,0, width+15, height+15);
aRenderingContext->SetColor(NS_RGB(0,0,0));
aRenderingContext->FillRect(rect);
aRenderingContext->SetColor(color2);
aRenderingContext->DrawString(buf, strlen(buf), x+15,y+15);
aRenderingContext->SetColor(color);
aRenderingContext->DrawString(buf, strlen(buf), x,y);
aRenderingContext->PopState();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
delete counter;
NS_Free(str);
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
delete counter;
NS_Free(str);
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
void ReflowCountMgr::CleanUp()
{
if (nsnull != mCounts) {
PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull);
PL_HashTableDestroy(mCounts);
mCounts = nsnull;
}
if (nsnull != mIndiFrameCounts) {
PL_HashTableEnumerateEntries(mIndiFrameCounts, RemoveIndiItems, nsnull);
PL_HashTableDestroy(mIndiFrameCounts);
mIndiFrameCounts = nsnull;
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
printf("\t\t\t\tTotal\n");
for (PRUint32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this);
}
}
static void RecurseIndiTotals(nsPresContext* aPresContext,
PLHashTable * aHT,
nsIFrame * aParentFrame,
PRInt32 aLevel)
{
if (aParentFrame == nsnull) {
return;
}
char key[16];
sprintf(key, "%p", (void*)aParentFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(aHT, key);
if (counter) {
counter->mHasBeenOutput = true;
char * name = ToNewCString(counter->mName);
for (PRInt32 i=0;i<aLevel;i++) printf(" ");
printf("%s - %p [%d][", name, (void*)aParentFrame, counter->mCount);
printf("%d", counter->mCounter.GetTotal());
printf("]\n");
nsMemory::Free(name);
}
nsIFrame* child = aParentFrame->GetFirstPrincipalChild();
while (child) {
RecurseIndiTotals(aPresContext, aHT, child, aLevel+1);
child = child->GetNextSibling();
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg)
{
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
if (counter && !counter->mHasBeenOutput) {
char * name = ToNewCString(counter->mName);
printf("%s - %p [%d][", name, (void*)counter->mFrame, counter->mCount);
printf("%d", counter->mCounter.GetTotal());
printf("]\n");
nsMemory::Free(name);
}
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoIndiTotalsTree()
{
if (nsnull != mCounts) {
printf("\n------------------------------------------------\n");
printf("-- Individual Frame Counts\n");
printf("------------------------------------------------\n");
if (mPresShell) {
nsIFrame * rootFrame = mPresShell->FrameManager()->GetRootFrame();
RecurseIndiTotals(mPresContext, mIndiFrameCounts, rootFrame, 0);
printf("------------------------------------------------\n");
printf("-- Individual Counts of Frames not in Root Tree\n");
printf("------------------------------------------------\n");
PL_HashTableEnumerateEntries(mIndiFrameCounts, DoSingleIndi, this);
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayHTMLTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandHTMLTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Class", "Reflows"};
fprintf(mFD, "<tr>");
for (PRUint32 i=0; i < ArrayLength(title); i++) {
fprintf(mFD, "<td><center><b>%s<b></center></td>", title[i]);
}
fprintf(mFD, "</tr>\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this);
}
}
//------------------------------------
void ReflowCountMgr::DisplayTotals(const char * aStr)
{
#ifdef DEBUG_rods
printf("%s\n", aStr?aStr:"No name");
#endif
if (mDumpFrameCounts) {
DoGrandTotals();
}
if (mDumpFrameByFrameCounts) {
DoIndiTotalsTree();
}
}
//------------------------------------
void ReflowCountMgr::DisplayHTMLTotals(const char * aStr)
{
#ifdef WIN32x // XXX NOT XP!
char name[1024];
char * sptr = strrchr(aStr, '/');
if (sptr) {
sptr++;
strcpy(name, sptr);
char * eptr = strrchr(name, '.');
if (eptr) {
*eptr = 0;
}
strcat(name, "_stats.html");
}
mFD = fopen(name, "w");
if (mFD) {
fprintf(mFD, "<html><head><title>Reflow Stats</title></head><body>\n");
const char * title = aStr?aStr:"No name";
fprintf(mFD, "<center><b>%s</b><br><table border=1 style=\"background-color:#e0e0e0\">", title);
DoGrandHTMLTotals();
fprintf(mFD, "</center></table>\n");
fprintf(mFD, "</body></html>\n");
fclose(mFD);
mFD = nsnull;
}
#endif // not XP!
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg)
{
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->ClearTotals();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearTotals()
{
PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this);
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, NS_strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
gTots->SetTotalsCache();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg)
{
bool cycledOnce = (arg != 0);
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
if (cycledOnce) {
counter->CalcDiffInTotals();
counter->DisplayDiffTotals(str);
}
counter->SetTotalsCache();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr)
{
if (mCycledOnce) {
printf("Differences\n");
for (PRInt32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
ClearGrandTotals();
}
PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce);
mCycledOnce = true;
}
#endif // MOZ_REFLOW_PERF
// make a color string like #RRGGBB
void ColorToString(nscolor aColor, nsAutoString &aString)
{
char buf[8];
PR_snprintf(buf, sizeof(buf), "#%02x%02x%02x",
NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor));
CopyASCIItoUTF16(buf, aString);
}
nsIFrame* nsIPresShell::GetAbsoluteContainingBlock(nsIFrame *aFrame)
{
return FrameConstructor()->GetAbsoluteContainingBlock(aFrame);
}
#ifdef ACCESSIBILITY
bool
nsIPresShell::IsAccessibilityActive()
{
return GetAccService() != nsnull;
}
nsAccessibilityService*
nsIPresShell::AccService()
{
return GetAccService();
}
#endif
void nsIPresShell::InitializeStatics()
{
NS_ASSERTION(sLiveShells == nsnull, "InitializeStatics called multiple times!");
sLiveShells = new nsTHashtable<PresShellPtrKey>();
sLiveShells->Init();
gCaptureTouchList.Init();
}
void nsIPresShell::ReleaseStatics()
{
NS_ASSERTION(sLiveShells, "ReleaseStatics called without Initialize!");
delete sLiveShells;
sLiveShells = nsnull;
}
// Asks our docshell whether we're active.
void PresShell::QueryIsActive()
{
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (mDocument) {
nsIDocument* displayDoc = mDocument->GetDisplayDocument();
if (displayDoc) {
// Ok, we're an external resource document -- we need to use our display
// document's docshell to determine "IsActive" status, since we lack
// a container.
NS_ABORT_IF_FALSE(!container,
"external resource doc shouldn't have "
"its own container");
nsIPresShell* displayPresShell = displayDoc->GetShell();
if (displayPresShell) {
container = displayPresShell->GetPresContext()->GetContainer();
}
}
}
nsCOMPtr<nsIDocShell> docshell(do_QueryInterface(container));
if (docshell) {
bool isActive;
nsresult rv = docshell->GetIsActive(&isActive);
if (NS_SUCCEEDED(rv))
SetIsActive(isActive);
}
}
// Helper for propagating mIsActive changes to external resources
static bool
SetExternalResourceIsActive(nsIDocument* aDocument, void* aClosure)
{
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
shell->SetIsActive(*static_cast<bool*>(aClosure));
}
return true;
}
static void
SetPluginIsActive(nsIContent* aContent, void* aClosure)
{
nsIFrame *frame = aContent->GetPrimaryFrame();
nsIObjectFrame *objectFrame = do_QueryFrame(frame);
if (objectFrame) {
objectFrame->SetIsDocumentActive(*static_cast<bool*>(aClosure));
}
}
nsresult
PresShell::SetIsActive(bool aIsActive)
{
NS_PRECONDITION(mDocument, "should only be called with a document");
mIsActive = aIsActive;
nsPresContext* presContext = GetPresContext();
if (presContext &&
presContext->RefreshDriver()->PresContext() == presContext) {
presContext->RefreshDriver()->SetThrottled(!mIsActive);
}
// Propagate state-change to my resource documents' PresShells
mDocument->EnumerateExternalResources(SetExternalResourceIsActive,
&aIsActive);
mDocument->EnumerateFreezableElements(SetPluginIsActive,
&aIsActive);
nsresult rv = UpdateImageLockingState();
#ifdef ACCESSIBILITY
if (aIsActive) {
nsAccessibilityService* accService = AccService();
if (accService) {
accService->PresShellActivated(this);
}
}
#endif
return rv;
}
/*
* Determines the current image locking state. Called when one of the
* dependent factors changes.
*/
nsresult
PresShell::UpdateImageLockingState()
{
// We're locked if we're both thawed and active.
return mDocument->SetImageLockingState(!mFrozen && mIsActive);
}
PresShell*
PresShell::GetRootPresShell()
{
if (mPresContext) {
nsPresContext* rootPresContext = mPresContext->GetRootPresContext();
if (rootPresContext) {
return static_cast<PresShell*>(rootPresContext->PresShell());
}
}
return nsnull;
}
size_t
PresShell::SizeOfTextRuns(nsMallocSizeOfFun aMallocSizeOf)
{
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame) {
return 0;
}
// clear the TEXT_RUN_MEMORY_ACCOUNTED flags
nsLayoutUtils::SizeOfTextRunsForFrames(rootFrame, nsnull,
/* clear = */true);
// collect the total memory in use for textruns
return nsLayoutUtils::SizeOfTextRunsForFrames(rootFrame, aMallocSizeOf,
/* clear = */false);
}
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