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gecko/layout/base/nsPresContext.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* a presentation of a document, part 1 */
#include "mozilla/DebugOnly.h"
#include "base/basictypes.h"
#include "nsCOMPtr.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsPIDOMWindow.h"
#include "nsStyleSet.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsIDocument.h"
#include "nsIPrintSettings.h"
#include "nsILanguageAtomService.h"
#include "mozilla/LookAndFeel.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIWeakReferenceUtils.h"
#include "nsAutoPtr.h"
#include "nsEventStateManager.h"
#include "nsThreadUtils.h"
#include "nsFrameManager.h"
#include "nsLayoutUtils.h"
#include "nsViewManager.h"
#include "RestyleManager.h"
#include "nsCSSRuleProcessor.h"
#include "nsRuleNode.h"
#include "nsEventDispatcher.h"
#include "gfxPlatform.h"
#include "nsCSSRules.h"
#include "nsFontFaceLoader.h"
#include "nsEventListenerManager.h"
#include "prenv.h"
#include "nsObjectFrame.h"
#include "nsTransitionManager.h"
#include "nsAnimationManager.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/Element.h"
#include "nsIMessageManager.h"
#include "nsDOMMediaQueryList.h"
#include "nsSMILAnimationController.h"
#include "mozilla/css/ImageLoader.h"
#include "mozilla/dom/TabChild.h"
#include "nsRefreshDriver.h"
#include "Layers.h"
#include "nsContentUtils.h"
#include "nsCxPusher.h"
#include "nsPIWindowRoot.h"
#include "mozilla/Preferences.h"
// Needed for Start/Stop of Image Animation
#include "imgIContainer.h"
#include "nsIImageLoadingContent.h"
#include "nsCSSParser.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::layers;
uint8_t gNotifySubDocInvalidationData;
/**
* Layer UserData for ContainerLayers that want to be notified
* of local invalidations of them and their descendant layers.
* Pass a callback to ComputeDifferences to have these called.
*/
class ContainerLayerPresContext : public LayerUserData {
public:
nsPresContext* mPresContext;
};
namespace {
class CharSetChangingRunnable : public nsRunnable
{
public:
CharSetChangingRunnable(nsPresContext* aPresContext,
const nsCString& aCharSet)
: mPresContext(aPresContext),
mCharSet(aCharSet)
{
}
NS_IMETHOD Run()
{
mPresContext->DoChangeCharSet(mCharSet);
return NS_OK;
}
private:
nsRefPtr<nsPresContext> mPresContext;
nsCString mCharSet;
};
} // anonymous namespace
nscolor
nsPresContext::MakeColorPref(const nsString& aColor)
{
nsCSSParser parser;
nsCSSValue value;
if (!parser.ParseColorString(aColor, nullptr, 0, value)) {
// Any better choices?
return NS_RGB(0, 0, 0);
}
nscolor color;
return nsRuleNode::ComputeColor(value, this, nullptr, color)
? color
: NS_RGB(0, 0, 0);
}
bool
nsPresContext::IsDOMPaintEventPending()
{
if (mFireAfterPaintEvents) {
return true;
}
if (GetDisplayRootPresContext()->GetRootPresContext()->mRefreshDriver->ViewManagerFlushIsPending()) {
// Since we're promising that there will be a MozAfterPaint event
// fired, we record an empty invalidation in case display list
// invalidation doesn't invalidate anything further.
NotifyInvalidation(nsRect(0, 0, 0, 0), 0);
NS_ASSERTION(mFireAfterPaintEvents, "Why aren't we planning to fire the event?");
return true;
}
return false;
}
int
nsPresContext::PrefChangedCallback(const char* aPrefName, void* instance_data)
{
nsPresContext* presContext = (nsPresContext*)instance_data;
NS_ASSERTION(nullptr != presContext, "bad instance data");
if (nullptr != presContext) {
presContext->PreferenceChanged(aPrefName);
}
return 0; // PREF_OK
}
void
nsPresContext::PrefChangedUpdateTimerCallback(nsITimer *aTimer, void *aClosure)
{
nsPresContext* presContext = (nsPresContext*)aClosure;
NS_ASSERTION(presContext != nullptr, "bad instance data");
if (presContext)
presContext->UpdateAfterPreferencesChanged();
}
#ifdef IBMBIDI
static bool
IsVisualCharset(const nsCString& aCharset)
{
if (aCharset.LowerCaseEqualsLiteral("ibm862") // Hebrew
|| aCharset.LowerCaseEqualsLiteral("iso-8859-8") ) { // Hebrew
return true; // visual text type
}
else {
return false; // logical text type
}
}
#endif // IBMBIDI
// NOTE! nsPresContext::operator new() zeroes out all members, so don't
// bother initializing members to 0.
nsPresContext::nsPresContext(nsIDocument* aDocument, nsPresContextType aType)
: mType(aType), mDocument(aDocument), mMinFontSize(0),
mTextZoom(1.0), mFullZoom(1.0), mLastFontInflationScreenWidth(-1.0),
mPageSize(-1, -1), mPPScale(1.0f),
mViewportStyleOverflow(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO),
mImageAnimationModePref(imgIContainer::kNormalAnimMode),
mAllInvalidated(false),
mPaintFlashing(false), mPaintFlashingInitialized(false)
{
// NOTE! nsPresContext::operator new() zeroes out all members, so don't
// bother initializing members to 0.
mDoScaledTwips = true;
SetBackgroundImageDraw(true); // always draw the background
SetBackgroundColorDraw(true);
mBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF);
mUseDocumentColors = true;
mUseDocumentFonts = true;
// the minimum font-size is unconstrained by default
mLinkColor = NS_RGB(0x00, 0x00, 0xEE);
mActiveLinkColor = NS_RGB(0xEE, 0x00, 0x00);
mVisitedLinkColor = NS_RGB(0x55, 0x1A, 0x8B);
mUnderlineLinks = true;
mSendAfterPaintToContent = false;
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
mFocusRingWidth = 1;
mBodyTextColor = mDefaultColor;
if (aType == eContext_Galley) {
mMedium = nsGkAtoms::screen;
} else {
mMedium = nsGkAtoms::print;
mPaginated = true;
}
mMediaEmulated = mMedium;
if (!IsDynamic()) {
mImageAnimationMode = imgIContainer::kDontAnimMode;
mNeverAnimate = true;
} else {
mImageAnimationMode = imgIContainer::kNormalAnimMode;
mNeverAnimate = false;
}
NS_ASSERTION(mDocument, "Null document");
mUserFontSet = nullptr;
mUserFontSetDirty = true;
PR_INIT_CLIST(&mDOMMediaQueryLists);
}
nsPresContext::~nsPresContext()
{
NS_PRECONDITION(!mShell, "Presshell forgot to clear our mShell pointer");
SetShell(nullptr);
NS_ABORT_IF_FALSE(PR_CLIST_IS_EMPTY(&mDOMMediaQueryLists),
"must not have media query lists left");
// Disconnect the refresh driver *after* the transition manager, which
// needs it.
if (mRefreshDriver && mRefreshDriver->PresContext() == this) {
mRefreshDriver->Disconnect();
}
if (mEventManager) {
// unclear if these are needed, but can't hurt
mEventManager->NotifyDestroyPresContext(this);
mEventManager->SetPresContext(nullptr);
}
if (mPrefChangedTimer)
{
mPrefChangedTimer->Cancel();
mPrefChangedTimer = nullptr;
}
// Unregister preference callbacks
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"font.",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"browser.display.",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"browser.underline_anchors",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"browser.anchor_color",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"browser.active_color",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"browser.visited_color",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"image.animation_mode",
this);
#ifdef IBMBIDI
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"bidi.",
this);
#endif // IBMBIDI
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"dom.send_after_paint_to_content",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"gfx.font_rendering.",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"layout.css.dpi",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"layout.css.devPixelsPerPx",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"nglayout.debug.paint_flashing",
this);
Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback,
"nglayout.debug.paint_flashing_chrome",
this);
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPresContext)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPresContext)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(nsPresContext, LastRelease())
void
nsPresContext::LastRelease()
{
if (IsRoot()) {
static_cast<nsRootPresContext*>(this)->CancelDidPaintTimer();
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsPresContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsPresContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument);
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mDeviceContext); // not xpcom
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventManager);
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mLanguage); // an atom
// We own only the items in mDOMMediaQueryLists that have listeners;
// this reference is managed by their AddListener and RemoveListener
// methods.
for (PRCList *l = PR_LIST_HEAD(&tmp->mDOMMediaQueryLists);
l != &tmp->mDOMMediaQueryLists; l = PR_NEXT_LINK(l)) {
nsDOMMediaQueryList *mql = static_cast<nsDOMMediaQueryList*>(l);
if (mql->HasListeners()) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mDOMMediaQueryLists item");
cb.NoteXPCOMChild(mql);
}
}
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTheme); // a service
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLangService); // a service
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrintSettings);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrefChangedTimer);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsPresContext)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument);
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDeviceContext); // worth bothering?
if (tmp->mEventManager) {
// unclear if these are needed, but can't hurt
tmp->mEventManager->NotifyDestroyPresContext(tmp);
tmp->mEventManager->SetPresContext(nullptr);
tmp->mEventManager = nullptr;
}
// We own only the items in mDOMMediaQueryLists that have listeners;
// this reference is managed by their AddListener and RemoveListener
// methods.
for (PRCList *l = PR_LIST_HEAD(&tmp->mDOMMediaQueryLists);
l != &tmp->mDOMMediaQueryLists; ) {
PRCList *next = PR_NEXT_LINK(l);
nsDOMMediaQueryList *mql = static_cast<nsDOMMediaQueryList*>(l);
mql->RemoveAllListeners();
l = next;
}
// NS_RELEASE(tmp->mLanguage); // an atom
// NS_IMPL_CYCLE_COLLECTION_UNLINK(mTheme); // a service
// NS_IMPL_CYCLE_COLLECTION_UNLINK(mLangService); // a service
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPrintSettings);
if (tmp->mPrefChangedTimer)
{
tmp->mPrefChangedTimer->Cancel();
tmp->mPrefChangedTimer = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
#define MAKE_FONT_PREF_KEY(_pref, _s0, _s1) \
_pref.Assign(_s0); \
_pref.Append(_s1);
static const char* const kGenericFont[] = {
".variable.",
".fixed.",
".serif.",
".sans-serif.",
".monospace.",
".cursive.",
".fantasy."
};
// whether no native theme service exists;
// if this gets set to true, we'll stop asking for it.
static bool sNoTheme = false;
// Set to true when LookAndFeelChanged needs to be called. This is used
// because the look and feel is a service, so there's no need to notify it from
// more than one prescontext.
static bool sLookAndFeelChanged;
// Set to true when ThemeChanged needs to be called on mTheme. This is used
// because mTheme is a service, so there's no need to notify it from more than
// one prescontext.
static bool sThemeChanged;
const nsPresContext::LangGroupFontPrefs*
nsPresContext::GetFontPrefsForLang(nsIAtom *aLanguage) const
{
// Get language group for aLanguage:
nsresult rv = NS_OK;
nsIAtom *langGroupAtom = nullptr;
if (!aLanguage) {
aLanguage = mLanguage;
}
if (aLanguage && mLangService) {
langGroupAtom = mLangService->GetLanguageGroup(aLanguage, &rv);
}
if (NS_FAILED(rv) || !langGroupAtom) {
langGroupAtom = nsGkAtoms::x_western; // Assume x-western is safe...
}
// Look for cached prefs for this lang group.
// Most documents will only use one (or very few) language groups. Rather
// than have the overhead of a hash lookup, we simply look along what will
// typically be a very short (usually of length 1) linked list. There are 31
// language groups, so in the worst case scenario we'll need to traverse 31
// link items.
LangGroupFontPrefs *prefs =
const_cast<LangGroupFontPrefs*>(&mLangGroupFontPrefs);
if (prefs->mLangGroup) { // if initialized
DebugOnly<uint32_t> count = 0;
for (;;) {
NS_ASSERTION(++count < 35, "Lang group count exceeded!!!");
if (prefs->mLangGroup == langGroupAtom) {
return prefs;
}
if (!prefs->mNext) {
break;
}
prefs = prefs->mNext;
}
// nothing cached, so go on and fetch the prefs for this lang group:
prefs = prefs->mNext = new LangGroupFontPrefs;
}
prefs->mLangGroup = langGroupAtom;
/* Fetch the font prefs to be used -- see bug 61883 for details.
Not all prefs are needed upfront. Some are fallback prefs intended
for the GFX font sub-system...
1) unit : assumed to be the same for all language groups -------------
font.size.unit = px | pt XXX could be folded in the size... bug 90440
2) attributes for generic fonts --------------------------------------
font.default.[langGroup] = serif | sans-serif - fallback generic font
font.name.[generic].[langGroup] = current user' selected font on the pref dialog
font.name-list.[generic].[langGroup] = fontname1, fontname2, ... [factory pre-built list]
font.size.[generic].[langGroup] = integer - settable by the user
font.size-adjust.[generic].[langGroup] = "float" - settable by the user
font.minimum-size.[langGroup] = integer - settable by the user
*/
nsAutoCString langGroup;
langGroupAtom->ToUTF8String(langGroup);
prefs->mDefaultVariableFont.size = CSSPixelsToAppUnits(16);
prefs->mDefaultFixedFont.size = CSSPixelsToAppUnits(13);
nsAutoCString pref;
// get the current applicable font-size unit
enum {eUnit_unknown = -1, eUnit_px, eUnit_pt};
int32_t unit = eUnit_px;
nsAdoptingCString cvalue =
Preferences::GetCString("font.size.unit");
if (!cvalue.IsEmpty()) {
if (cvalue.Equals("px")) {
unit = eUnit_px;
}
else if (cvalue.Equals("pt")) {
unit = eUnit_pt;
}
else {
// XXX should really send this warning to the user (Error Console?).
// And just default to unit = eUnit_px?
NS_WARNING("unexpected font-size unit -- expected: 'px' or 'pt'");
unit = eUnit_unknown;
}
}
// get font.minimum-size.[langGroup]
MAKE_FONT_PREF_KEY(pref, "font.minimum-size.", langGroup);
int32_t size = Preferences::GetInt(pref.get());
if (unit == eUnit_px) {
prefs->mMinimumFontSize = CSSPixelsToAppUnits(size);
}
else if (unit == eUnit_pt) {
prefs->mMinimumFontSize = CSSPointsToAppUnits(size);
}
nsFont* fontTypes[] = {
&prefs->mDefaultVariableFont,
&prefs->mDefaultFixedFont,
&prefs->mDefaultSerifFont,
&prefs->mDefaultSansSerifFont,
&prefs->mDefaultMonospaceFont,
&prefs->mDefaultCursiveFont,
&prefs->mDefaultFantasyFont
};
static_assert(NS_ARRAY_LENGTH(fontTypes) == eDefaultFont_COUNT,
"FontTypes array count is not correct");
// Get attributes specific to each generic font. We do not get the user's
// generic-font-name-to-specific-family-name preferences because its the
// generic name that should be fed into the cascade. It is up to the GFX
// code to look up the font prefs to convert generic names to specific
// family names as necessary.
nsAutoCString generic_dot_langGroup;
for (uint32_t eType = 0; eType < ArrayLength(fontTypes); ++eType) {
generic_dot_langGroup.Assign(kGenericFont[eType]);
generic_dot_langGroup.Append(langGroup);
nsFont* font = fontTypes[eType];
// set the default variable font (the other fonts are seen as 'generic' fonts
// in GFX and will be queried there when hunting for alternative fonts)
if (eType == eDefaultFont_Variable) {
MAKE_FONT_PREF_KEY(pref, "font.name.variable.", langGroup);
nsAdoptingString value = Preferences::GetString(pref.get());
if (!value.IsEmpty()) {
prefs->mDefaultVariableFont.name.Assign(value);
}
else {
MAKE_FONT_PREF_KEY(pref, "font.default.", langGroup);
value = Preferences::GetString(pref.get());
if (!value.IsEmpty()) {
prefs->mDefaultVariableFont.name.Assign(value);
}
}
}
else {
if (eType == eDefaultFont_Monospace) {
// This takes care of the confusion whereby people often expect "monospace"
// to have the same default font-size as "-moz-fixed" (this tentative
// size may be overwritten with the specific value for "monospace" when
// "font.size.monospace.[langGroup]" is read -- see below)
prefs->mDefaultMonospaceFont.size = prefs->mDefaultFixedFont.size;
}
else if (eType != eDefaultFont_Fixed) {
// all the other generic fonts are initialized with the size of the
// variable font, but their specific size can supersede later -- see below
font->size = prefs->mDefaultVariableFont.size;
}
}
// Bug 84398: for spec purists, a different font-size only applies to the
// .variable. and .fixed. fonts and the other fonts should get |font-size-adjust|.
// The problem is that only GfxWin has the support for |font-size-adjust|. So for
// parity, we enable the ability to set a different font-size on all platforms.
// get font.size.[generic].[langGroup]
// size=0 means 'Auto', i.e., generic fonts retain the size of the variable font
MAKE_FONT_PREF_KEY(pref, "font.size", generic_dot_langGroup);
size = Preferences::GetInt(pref.get());
if (size > 0) {
if (unit == eUnit_px) {
font->size = CSSPixelsToAppUnits(size);
}
else if (unit == eUnit_pt) {
font->size = CSSPointsToAppUnits(size);
}
}
// get font.size-adjust.[generic].[langGroup]
// XXX only applicable on GFX ports that handle |font-size-adjust|
MAKE_FONT_PREF_KEY(pref, "font.size-adjust", generic_dot_langGroup);
cvalue = Preferences::GetCString(pref.get());
if (!cvalue.IsEmpty()) {
font->sizeAdjust = (float)atof(cvalue.get());
}
#ifdef DEBUG_rbs
printf("%s Family-list:%s size:%d sizeAdjust:%.2f\n",
generic_dot_langGroup.get(),
NS_ConvertUTF16toUTF8(font->name).get(), font->size,
font->sizeAdjust);
#endif
}
return prefs;
}
void
nsPresContext::GetDocumentColorPreferences()
{
int32_t useAccessibilityTheme = 0;
bool usePrefColors = true;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
int32_t docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType) {
usePrefColors = false;
}
else {
useAccessibilityTheme =
LookAndFeel::GetInt(LookAndFeel::eIntID_UseAccessibilityTheme, 0);
usePrefColors = !useAccessibilityTheme;
}
}
if (usePrefColors) {
usePrefColors =
!Preferences::GetBool("browser.display.use_system_colors", false);
}
if (usePrefColors) {
nsAdoptingString colorStr =
Preferences::GetString("browser.display.foreground_color");
if (!colorStr.IsEmpty()) {
mDefaultColor = MakeColorPref(colorStr);
}
colorStr = Preferences::GetString("browser.display.background_color");
if (!colorStr.IsEmpty()) {
mBackgroundColor = MakeColorPref(colorStr);
}
}
else {
mDefaultColor =
LookAndFeel::GetColor(LookAndFeel::eColorID_WindowForeground,
NS_RGB(0x00, 0x00, 0x00));
mBackgroundColor =
LookAndFeel::GetColor(LookAndFeel::eColorID_WindowBackground,
NS_RGB(0xFF, 0xFF, 0xFF));
}
// Wherever we got the default background color from, ensure it is
// opaque.
mBackgroundColor = NS_ComposeColors(NS_RGB(0xFF, 0xFF, 0xFF),
mBackgroundColor);
mUseDocumentColors = !useAccessibilityTheme &&
Preferences::GetBool("browser.display.use_document_colors",
mUseDocumentColors);
}
void
nsPresContext::GetUserPreferences()
{
if (!GetPresShell()) {
// No presshell means nothing to do here. We'll do this when we
// get a presshell.
return;
}
mAutoQualityMinFontSizePixelsPref =
Preferences::GetInt("browser.display.auto_quality_min_font_size");
// * document colors
GetDocumentColorPreferences();
mSendAfterPaintToContent =
Preferences::GetBool("dom.send_after_paint_to_content",
mSendAfterPaintToContent);
// * link colors
mUnderlineLinks =
Preferences::GetBool("browser.underline_anchors", mUnderlineLinks);
nsAdoptingString colorStr = Preferences::GetString("browser.anchor_color");
if (!colorStr.IsEmpty()) {
mLinkColor = MakeColorPref(colorStr);
}
colorStr = Preferences::GetString("browser.active_color");
if (!colorStr.IsEmpty()) {
mActiveLinkColor = MakeColorPref(colorStr);
}
colorStr = Preferences::GetString("browser.visited_color");
if (!colorStr.IsEmpty()) {
mVisitedLinkColor = MakeColorPref(colorStr);
}
mUseFocusColors =
Preferences::GetBool("browser.display.use_focus_colors", mUseFocusColors);
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
colorStr = Preferences::GetString("browser.display.focus_text_color");
if (!colorStr.IsEmpty()) {
mFocusTextColor = MakeColorPref(colorStr);
}
colorStr = Preferences::GetString("browser.display.focus_background_color");
if (!colorStr.IsEmpty()) {
mFocusBackgroundColor = MakeColorPref(colorStr);
}
mFocusRingWidth =
Preferences::GetInt("browser.display.focus_ring_width", mFocusRingWidth);
mFocusRingOnAnything =
Preferences::GetBool("browser.display.focus_ring_on_anything",
mFocusRingOnAnything);
mFocusRingStyle =
Preferences::GetInt("browser.display.focus_ring_style", mFocusRingStyle);
mBodyTextColor = mDefaultColor;
// * use fonts?
mUseDocumentFonts =
Preferences::GetInt("browser.display.use_document_fonts") != 0;
// * replace backslashes with Yen signs? (bug 245770)
mEnableJapaneseTransform =
Preferences::GetBool("layout.enable_japanese_specific_transform");
mPrefScrollbarSide = Preferences::GetInt("layout.scrollbar.side");
ResetCachedFontPrefs();
// * image animation
const nsAdoptingCString& animatePref =
Preferences::GetCString("image.animation_mode");
if (animatePref.Equals("normal"))
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
else if (animatePref.Equals("none"))
mImageAnimationModePref = imgIContainer::kDontAnimMode;
else if (animatePref.Equals("once"))
mImageAnimationModePref = imgIContainer::kLoopOnceAnimMode;
else // dynamic change to invalid value should act like it does initially
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
uint32_t bidiOptions = GetBidi();
int32_t prefInt =
Preferences::GetInt(IBMBIDI_TEXTDIRECTION_STR,
GET_BIDI_OPTION_DIRECTION(bidiOptions));
SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt);
mPrefBidiDirection = prefInt;
prefInt =
Preferences::GetInt(IBMBIDI_TEXTTYPE_STR,
GET_BIDI_OPTION_TEXTTYPE(bidiOptions));
SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt);
prefInt =
Preferences::GetInt(IBMBIDI_NUMERAL_STR,
GET_BIDI_OPTION_NUMERAL(bidiOptions));
SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt);
prefInt =
Preferences::GetInt(IBMBIDI_SUPPORTMODE_STR,
GET_BIDI_OPTION_SUPPORT(bidiOptions));
SET_BIDI_OPTION_SUPPORT(bidiOptions, prefInt);
// We don't need to force reflow: either we are initializing a new
// prescontext or we are being called from UpdateAfterPreferencesChanged()
// which triggers a reflow anyway.
SetBidi(bidiOptions, false);
}
void
nsPresContext::InvalidateThebesLayers()
{
if (!mShell)
return;
nsIFrame* rootFrame = mShell->FrameManager()->GetRootFrame();
if (rootFrame) {
// FrameLayerBuilder caches invalidation-related values that depend on the
// appunits-per-dev-pixel ratio, so ensure that all ThebesLayer drawing
// is completely flushed.
rootFrame->InvalidateFrameSubtree();
}
}
void
nsPresContext::AppUnitsPerDevPixelChanged()
{
InvalidateThebesLayers();
mDeviceContext->FlushFontCache();
if (HasCachedStyleData()) {
// All cached style data must be recomputed.
MediaFeatureValuesChanged(eAlwaysRebuildStyle, NS_STYLE_HINT_REFLOW);
}
mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
}
void
nsPresContext::PreferenceChanged(const char* aPrefName)
{
nsDependentCString prefName(aPrefName);
if (prefName.EqualsLiteral("layout.css.dpi") ||
prefName.EqualsLiteral("layout.css.devPixelsPerPx")) {
int32_t oldAppUnitsPerDevPixel = AppUnitsPerDevPixel();
if (mDeviceContext->CheckDPIChange() && mShell) {
// Re-fetch the view manager's window dimensions in case there's a deferred
// resize which hasn't affected our mVisibleArea yet
nscoord oldWidthAppUnits, oldHeightAppUnits;
nsViewManager* vm = mShell->GetViewManager();
vm->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
float oldWidthDevPixels = oldWidthAppUnits/oldAppUnitsPerDevPixel;
float oldHeightDevPixels = oldHeightAppUnits/oldAppUnitsPerDevPixel;
nscoord width = NSToCoordRound(oldWidthDevPixels*AppUnitsPerDevPixel());
nscoord height = NSToCoordRound(oldHeightDevPixels*AppUnitsPerDevPixel());
vm->SetWindowDimensions(width, height);
AppUnitsPerDevPixelChanged();
}
return;
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("font."))) {
// Changes to font family preferences don't change anything in the
// computed style data, so the style system won't generate a reflow
// hint for us. We need to do that manually.
// FIXME We could probably also handle changes to
// browser.display.auto_quality_min_font_size here, but that
// probably also requires clearing the text run cache, so don't
// bother (yet, anyway).
mPrefChangePendingNeedsReflow = true;
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("bidi."))) {
// Changes to bidi prefs need to trigger a reflow (see bug 443629)
mPrefChangePendingNeedsReflow = true;
// Changes to bidi.numeral also needs to empty the text run cache.
// This is handled in gfxTextRunWordCache.cpp.
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("gfx.font_rendering."))) {
// Changes to font_rendering prefs need to trigger a reflow
mPrefChangePendingNeedsReflow = true;
}
// we use a zero-delay timer to coalesce multiple pref updates
if (!mPrefChangedTimer)
{
mPrefChangedTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPrefChangedTimer)
return;
mPrefChangedTimer->InitWithFuncCallback(nsPresContext::PrefChangedUpdateTimerCallback, (void*)this, 0, nsITimer::TYPE_ONE_SHOT);
}
if (prefName.EqualsLiteral("nglayout.debug.paint_flashing") ||
prefName.EqualsLiteral("nglayout.debug.paint_flashing_chrome")) {
mPaintFlashingInitialized = false;
return;
}
}
void
nsPresContext::UpdateAfterPreferencesChanged()
{
mPrefChangedTimer = nullptr;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
int32_t docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType)
return;
}
// Initialize our state from the user preferences
GetUserPreferences();
// update the presShell: tell it to set the preference style rules up
if (mShell) {
mShell->SetPreferenceStyleRules(true);
}
InvalidateThebesLayers();
mDeviceContext->FlushFontCache();
nsChangeHint hint = nsChangeHint(0);
if (mPrefChangePendingNeedsReflow) {
NS_UpdateHint(hint, NS_STYLE_HINT_REFLOW);
}
RebuildAllStyleData(hint);
}
nsresult
nsPresContext::Init(nsDeviceContext* aDeviceContext)
{
NS_ASSERTION(!mInitialized, "attempt to reinit pres context");
NS_ENSURE_ARG(aDeviceContext);
mDeviceContext = aDeviceContext;
if (mDeviceContext->SetPixelScale(mFullZoom))
mDeviceContext->FlushFontCache();
mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
mEventManager = new nsEventStateManager();
mTransitionManager = new nsTransitionManager(this);
mAnimationManager = new nsAnimationManager(this);
// FIXME: Why is mozilla:: needed?
mRestyleManager = new mozilla::RestyleManager(this);
if (mDocument->GetDisplayDocument()) {
NS_ASSERTION(mDocument->GetDisplayDocument()->GetShell() &&
mDocument->GetDisplayDocument()->GetShell()->GetPresContext(),
"Why are we being initialized?");
mRefreshDriver = mDocument->GetDisplayDocument()->GetShell()->
GetPresContext()->RefreshDriver();
} else {
nsIDocument* parent = mDocument->GetParentDocument();
// Unfortunately, sometimes |parent| here has no presshell because
// printing screws up things. Assert that in other cases it does,
// but whenever the shell is null just fall back on using our own
// refresh driver.
NS_ASSERTION(!parent || mDocument->IsStaticDocument() || parent->GetShell(),
"How did we end up with a presshell if our parent doesn't "
"have one?");
if (parent && parent->GetShell()) {
NS_ASSERTION(parent->GetShell()->GetPresContext(),
"How did we get a presshell?");
// We don't have our container set yet at this point
nsCOMPtr<nsISupports> ourContainer = mDocument->GetContainer();
nsCOMPtr<nsIDocShellTreeItem> ourItem = do_QueryInterface(ourContainer);
if (ourItem) {
nsCOMPtr<nsIDocShellTreeItem> parentItem;
ourItem->GetSameTypeParent(getter_AddRefs(parentItem));
if (parentItem) {
Element* containingElement =
parent->FindContentForSubDocument(mDocument);
if (!containingElement->IsXUL() ||
!containingElement->
HasAttr(kNameSpaceID_None,
nsGkAtoms::forceOwnRefreshDriver)) {
mRefreshDriver = parent->GetShell()->GetPresContext()->RefreshDriver();
}
}
}
}
if (!mRefreshDriver) {
mRefreshDriver = new nsRefreshDriver(this);
}
}
// Initialise refresh tick counters for OMTA
mLastStyleUpdateForAllAnimations =
mLastUpdateThrottledStyle = mRefreshDriver->MostRecentRefresh();
mLangService = do_GetService(NS_LANGUAGEATOMSERVICE_CONTRACTID);
// Register callbacks so we're notified when the preferences change
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"font.",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"browser.display.",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"browser.underline_anchors",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"browser.anchor_color",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"browser.active_color",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"browser.visited_color",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"image.animation_mode",
this);
#ifdef IBMBIDI
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"bidi.",
this);
#endif
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"dom.send_after_paint_to_content",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"gfx.font_rendering.",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"layout.css.dpi",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"layout.css.devPixelsPerPx",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"nglayout.debug.paint_flashing",
this);
Preferences::RegisterCallback(nsPresContext::PrefChangedCallback,
"nglayout.debug.paint_flashing_chrome",
this);
nsresult rv = mEventManager->Init();
NS_ENSURE_SUCCESS(rv, rv);
mEventManager->SetPresContext(this);
#ifdef DEBUG
mInitialized = true;
#endif
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THIN] = CSSPixelsToAppUnits(1);
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_MEDIUM] = CSSPixelsToAppUnits(3);
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THICK] = CSSPixelsToAppUnits(5);
return NS_OK;
}
// Note: We don't hold a reference on the shell; it has a reference to
// us
void
nsPresContext::SetShell(nsIPresShell* aShell)
{
if (mUserFontSet) {
// Clear out user font set if we have one
mUserFontSet->Destroy();
NS_RELEASE(mUserFontSet);
}
if (mShell) {
// Remove ourselves as the charset observer from the shell's doc, because
// this shell may be going away for good.
nsIDocument *doc = mShell->GetDocument();
if (doc) {
doc->RemoveCharSetObserver(this);
}
}
mShell = aShell;
if (mShell) {
nsIDocument *doc = mShell->GetDocument();
NS_ASSERTION(doc, "expect document here");
if (doc) {
// Have to update PresContext's mDocument before calling any other methods.
mDocument = doc;
}
// Initialize our state from the user preferences, now that we
// have a presshell, and hence a document.
GetUserPreferences();
if (doc) {
nsIURI *docURI = doc->GetDocumentURI();
if (IsDynamic() && docURI) {
bool isChrome = false;
bool isRes = false;
docURI->SchemeIs("chrome", &isChrome);
docURI->SchemeIs("resource", &isRes);
if (!isChrome && !isRes)
mImageAnimationMode = mImageAnimationModePref;
else
mImageAnimationMode = imgIContainer::kNormalAnimMode;
}
if (mLangService) {
doc->AddCharSetObserver(this);
UpdateCharSet(doc->GetDocumentCharacterSet());
}
}
} else {
if (mTransitionManager) {
mTransitionManager->Disconnect();
mTransitionManager = nullptr;
}
if (mAnimationManager) {
mAnimationManager->Disconnect();
mAnimationManager = nullptr;
}
if (mRestyleManager) {
mRestyleManager->Disconnect();
mRestyleManager = nullptr;
}
if (IsRoot()) {
// Have to cancel our plugin geometry timer, because the
// callback for that depends on a non-null presshell.
static_cast<nsRootPresContext*>(this)->CancelApplyPluginGeometryTimer();
}
}
}
void
nsPresContext::DoChangeCharSet(const nsCString& aCharSet)
{
UpdateCharSet(aCharSet);
mDeviceContext->FlushFontCache();
RebuildAllStyleData(NS_STYLE_HINT_REFLOW);
}
void
nsPresContext::UpdateCharSet(const nsCString& aCharSet)
{
if (mLangService) {
mLanguage = mLangService->LookupCharSet(aCharSet.get());
// this will be a language group (or script) code rather than a true language code
// bug 39570: moved from nsLanguageAtomService::LookupCharSet()
if (mLanguage == nsGkAtoms::Unicode) {
mLanguage = mLangService->GetLocaleLanguage();
}
ResetCachedFontPrefs();
}
#ifdef IBMBIDI
//ahmed
switch (GET_BIDI_OPTION_TEXTTYPE(GetBidi())) {
case IBMBIDI_TEXTTYPE_LOGICAL:
SetVisualMode(false);
break;
case IBMBIDI_TEXTTYPE_VISUAL:
SetVisualMode(true);
break;
case IBMBIDI_TEXTTYPE_CHARSET:
default:
SetVisualMode(IsVisualCharset(aCharSet));
}
#endif // IBMBIDI
}
NS_IMETHODIMP
nsPresContext::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
if (!nsCRT::strcmp(aTopic, "charset")) {
nsRefPtr<CharSetChangingRunnable> runnable =
new CharSetChangingRunnable(this, NS_LossyConvertUTF16toASCII(aData));
return NS_DispatchToCurrentThread(runnable);
}
NS_WARNING("unrecognized topic in nsPresContext::Observe");
return NS_ERROR_FAILURE;
}
nsPresContext*
nsPresContext::GetParentPresContext()
{
nsIPresShell* shell = GetPresShell();
if (shell) {
nsViewManager* viewManager = shell->GetViewManager();
if (viewManager) {
nsView* view = viewManager->GetRootView();
if (view) {
view = view->GetParent(); // anonymous inner view
if (view) {
view = view->GetParent(); // subdocumentframe's view
if (view) {
nsIFrame* f = view->GetFrame();
if (f) {
return f->PresContext();
}
}
}
}
}
}
return nullptr;
}
nsPresContext*
nsPresContext::GetToplevelContentDocumentPresContext()
{
if (IsChrome())
return nullptr;
nsPresContext* pc = this;
for (;;) {
nsPresContext* parent = pc->GetParentPresContext();
if (!parent || parent->IsChrome())
return pc;
pc = parent;
}
}
nsIWidget*
nsPresContext::GetNearestWidget(nsPoint* aOffset)
{
NS_ENSURE_TRUE(mShell, nullptr);
nsIFrame* frame = mShell->GetRootFrame();
NS_ENSURE_TRUE(frame, nullptr);
return frame->GetView()->GetNearestWidget(aOffset);
}
nsIWidget*
nsPresContext::GetRootWidget()
{
NS_ENSURE_TRUE(mShell, nullptr);
nsViewManager* vm = mShell->GetViewManager();
if (!vm) {
return nullptr;
}
nsCOMPtr<nsIWidget> widget;
vm->GetRootWidget(getter_AddRefs(widget));
return widget.get();
}
// We may want to replace this with something faster, maybe caching the root prescontext
nsRootPresContext*
nsPresContext::GetRootPresContext()
{
nsPresContext* pc = this;
for (;;) {
nsPresContext* parent = pc->GetParentPresContext();
if (!parent)
break;
pc = parent;
}
return pc->IsRoot() ? static_cast<nsRootPresContext*>(pc) : nullptr;
}
nsRootPresContext*
nsPresContext::GetDisplayRootPresContext()
{
nsPresContext* pc = this;
for (;;) {
nsPresContext* parent = pc->GetParentPresContext();
if (!parent) {
// Not sure if this is always strictly the parent, but it works for GetRootPresContext
// where the current pres context has no frames.
nsIDocument *doc = pc->Document();
if (doc) {
doc = doc->GetParentDocument();
if (doc) {
nsIPresShell* shell = doc->GetShell();
if (shell) {
parent = shell->GetPresContext();
}
}
}
}
if (!parent || parent == pc)
break;
pc = parent;
}
return pc->IsRoot() ? static_cast<nsRootPresContext*>(pc) : nullptr;
}
void
nsPresContext::CompatibilityModeChanged()
{
if (!mShell)
return;
// enable/disable the QuirkSheet
mShell->StyleSet()->
EnableQuirkStyleSheet(CompatibilityMode() == eCompatibility_NavQuirks);
}
// Helper function for setting Anim Mode on image
static void SetImgAnimModeOnImgReq(imgIRequest* aImgReq, uint16_t aMode)
{
if (aImgReq) {
nsCOMPtr<imgIContainer> imgCon;
aImgReq->GetImage(getter_AddRefs(imgCon));
if (imgCon) {
imgCon->SetAnimationMode(aMode);
}
}
}
// IMPORTANT: Assumption is that all images for a Presentation
// have the same Animation Mode (pavlov said this was OK)
//
// Walks content and set the animation mode
// this is a way to turn on/off image animations
void nsPresContext::SetImgAnimations(nsIContent *aParent, uint16_t aMode)
{
nsCOMPtr<nsIImageLoadingContent> imgContent(do_QueryInterface(aParent));
if (imgContent) {
nsCOMPtr<imgIRequest> imgReq;
imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgReq));
SetImgAnimModeOnImgReq(imgReq, aMode);
}
uint32_t count = aParent->GetChildCount();
for (uint32_t i = 0; i < count; ++i) {
SetImgAnimations(aParent->GetChildAt(i), aMode);
}
}
void
nsPresContext::SetSMILAnimations(nsIDocument *aDoc, uint16_t aNewMode,
uint16_t aOldMode)
{
if (aDoc->HasAnimationController()) {
nsSMILAnimationController* controller = aDoc->GetAnimationController();
switch (aNewMode)
{
case imgIContainer::kNormalAnimMode:
case imgIContainer::kLoopOnceAnimMode:
if (aOldMode == imgIContainer::kDontAnimMode)
controller->Resume(nsSMILTimeContainer::PAUSE_USERPREF);
break;
case imgIContainer::kDontAnimMode:
if (aOldMode != imgIContainer::kDontAnimMode)
controller->Pause(nsSMILTimeContainer::PAUSE_USERPREF);
break;
}
}
}
void
nsPresContext::SetImageAnimationModeInternal(uint16_t aMode)
{
NS_ASSERTION(aMode == imgIContainer::kNormalAnimMode ||
aMode == imgIContainer::kDontAnimMode ||
aMode == imgIContainer::kLoopOnceAnimMode, "Wrong Animation Mode is being set!");
// Image animation mode cannot be changed when rendering to a printer.
if (!IsDynamic())
return;
// Now walk the content tree and set the animation mode
// on all the images.
if (mShell != nullptr) {
nsIDocument *doc = mShell->GetDocument();
if (doc) {
doc->StyleImageLoader()->SetAnimationMode(aMode);
Element *rootElement = doc->GetRootElement();
if (rootElement) {
SetImgAnimations(rootElement, aMode);
}
SetSMILAnimations(doc, aMode, mImageAnimationMode);
}
}
mImageAnimationMode = aMode;
}
void
nsPresContext::SetImageAnimationModeExternal(uint16_t aMode)
{
SetImageAnimationModeInternal(aMode);
}
const nsFont*
nsPresContext::GetDefaultFont(uint8_t aFontID, nsIAtom *aLanguage) const
{
const LangGroupFontPrefs *prefs = GetFontPrefsForLang(aLanguage);
const nsFont *font;
switch (aFontID) {
// Special (our default variable width font and fixed width font)
case kPresContext_DefaultVariableFont_ID:
font = &prefs->mDefaultVariableFont;
break;
case kPresContext_DefaultFixedFont_ID:
font = &prefs->mDefaultFixedFont;
break;
// CSS
case kGenericFont_serif:
font = &prefs->mDefaultSerifFont;
break;
case kGenericFont_sans_serif:
font = &prefs->mDefaultSansSerifFont;
break;
case kGenericFont_monospace:
font = &prefs->mDefaultMonospaceFont;
break;
case kGenericFont_cursive:
font = &prefs->mDefaultCursiveFont;
break;
case kGenericFont_fantasy:
font = &prefs->mDefaultFantasyFont;
break;
default:
font = nullptr;
NS_ERROR("invalid arg");
break;
}
return font;
}
void
nsPresContext::SetFullZoom(float aZoom)
{
if (!mShell || mFullZoom == aZoom) {
return;
}
// Re-fetch the view manager's window dimensions in case there's a deferred
// resize which hasn't affected our mVisibleArea yet
nscoord oldWidthAppUnits, oldHeightAppUnits;
mShell->GetViewManager()->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
float oldWidthDevPixels = oldWidthAppUnits / float(mCurAppUnitsPerDevPixel);
float oldHeightDevPixels = oldHeightAppUnits / float(mCurAppUnitsPerDevPixel);
mDeviceContext->SetPixelScale(aZoom);
NS_ASSERTION(!mSupressResizeReflow, "two zooms happening at the same time? impossible!");
mSupressResizeReflow = true;
mFullZoom = aZoom;
mShell->GetViewManager()->
SetWindowDimensions(NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel()),
NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel()));
AppUnitsPerDevPixelChanged();
mSupressResizeReflow = false;
}
float
nsPresContext::ScreenWidthInchesForFontInflation(bool* aChanged)
{
if (aChanged) {
*aChanged = false;
}
nsDeviceContext *dx = DeviceContext();
nsRect clientRect;
dx->GetClientRect(clientRect); // FIXME: GetClientRect looks expensive
float deviceWidthInches =
float(clientRect.width) / float(dx->AppUnitsPerPhysicalInch());
if (mLastFontInflationScreenWidth == -1.0) {
mLastFontInflationScreenWidth = deviceWidthInches;
}
if (deviceWidthInches != mLastFontInflationScreenWidth && aChanged) {
*aChanged = true;
mLastFontInflationScreenWidth = deviceWidthInches;
}
return deviceWidthInches;
}
void
nsPresContext::SetContainer(nsISupports* aHandler)
{
mContainer = do_GetWeakReference(aHandler);
InvalidateIsChromeCache();
if (mContainer) {
GetDocumentColorPreferences();
}
}
already_AddRefed<nsISupports>
nsPresContext::GetContainerInternal() const
{
nsCOMPtr<nsISupports> result = do_QueryReferent(mContainer);
return result.forget();
}
already_AddRefed<nsISupports>
nsPresContext::GetContainerExternal() const
{
return GetContainerInternal();
}
bool
nsPresContext::ThrottledStyleIsUpToDate() const
{
return mLastUpdateThrottledStyle == mRefreshDriver->MostRecentRefresh();
}
void
nsPresContext::TickLastUpdateThrottledStyle()
{
mLastUpdateThrottledStyle = mRefreshDriver->MostRecentRefresh();
}
bool
nsPresContext::StyleUpdateForAllAnimationsIsUpToDate()
{
return mLastStyleUpdateForAllAnimations == mRefreshDriver->MostRecentRefresh();
}
void
nsPresContext::TickLastStyleUpdateForAllAnimations()
{
mLastStyleUpdateForAllAnimations = mRefreshDriver->MostRecentRefresh();
}
#ifdef IBMBIDI
bool
nsPresContext::BidiEnabledExternal() const
{
return BidiEnabledInternal();
}
bool
nsPresContext::BidiEnabledInternal() const
{
return Document()->GetBidiEnabled();
}
void
nsPresContext::SetBidiEnabled() const
{
if (mShell) {
nsIDocument *doc = mShell->GetDocument();
if (doc) {
doc->SetBidiEnabled();
}
}
}
void
nsPresContext::SetBidi(uint32_t aSource, bool aForceRestyle)
{
// Don't do all this stuff unless the options have changed.
if (aSource == GetBidi()) {
return;
}
NS_ASSERTION(!(aForceRestyle && (GetBidi() == 0)),
"ForceReflow on new prescontext");
Document()->SetBidiOptions(aSource);
if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(aSource)
|| IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(aSource)) {
SetBidiEnabled();
}
if (IBMBIDI_TEXTTYPE_VISUAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
SetVisualMode(true);
}
else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
SetVisualMode(false);
}
else {
nsIDocument* doc = mShell->GetDocument();
if (doc) {
SetVisualMode(IsVisualCharset(doc->GetDocumentCharacterSet()));
}
}
if (aForceRestyle && mShell) {
// Reconstruct the root document element's frame and its children,
// because we need to trigger frame reconstruction for direction change.
RebuildUserFontSet();
mShell->ReconstructFrames();
}
}
uint32_t
nsPresContext::GetBidi() const
{
return Document()->GetBidiOptions();
}
#endif //IBMBIDI
bool
nsPresContext::IsTopLevelWindowInactive()
{
nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryReferent(mContainer));
if (!treeItem)
return false;
nsCOMPtr<nsIDocShellTreeItem> rootItem;
treeItem->GetRootTreeItem(getter_AddRefs(rootItem));
nsCOMPtr<nsPIDOMWindow> domWindow(do_GetInterface(rootItem));
return domWindow && !domWindow->IsActive();
}
nsITheme*
nsPresContext::GetTheme()
{
if (!sNoTheme && !mTheme) {
mTheme = do_GetService("@mozilla.org/chrome/chrome-native-theme;1");
if (!mTheme)
sNoTheme = true;
}
return mTheme;
}
void
nsPresContext::ThemeChanged()
{
if (!mPendingThemeChanged) {
sLookAndFeelChanged = true;
sThemeChanged = true;
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::ThemeChangedInternal);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingThemeChanged = true;
}
}
}
void
nsPresContext::ThemeChangedInternal()
{
mPendingThemeChanged = false;
// Tell the theme that it changed, so it can flush any handles to stale theme
// data.
if (mTheme && sThemeChanged) {
mTheme->ThemeChanged();
sThemeChanged = false;
}
// Clear all cached LookAndFeel colors.
if (sLookAndFeelChanged) {
LookAndFeel::Refresh();
sLookAndFeelChanged = false;
}
// This will force the system metrics to be generated the next time they're used
nsCSSRuleProcessor::FreeSystemMetrics();
// Changes to system metrics can change media queries on them.
// Changes in theme can change system colors (whose changes are
// properly reflected in computed style data), system fonts (whose
// changes are not), and -moz-appearance (whose changes likewise are
// not), so we need to reflow.
MediaFeatureValuesChanged(eAlwaysRebuildStyle, NS_STYLE_HINT_REFLOW);
}
void
nsPresContext::SysColorChanged()
{
if (!mPendingSysColorChanged) {
sLookAndFeelChanged = true;
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::SysColorChangedInternal);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingSysColorChanged = true;
}
}
}
void
nsPresContext::SysColorChangedInternal()
{
mPendingSysColorChanged = false;
if (sLookAndFeelChanged) {
// Don't use the cached values for the system colors
LookAndFeel::Refresh();
sLookAndFeelChanged = false;
}
// Reset default background and foreground colors for the document since
// they may be using system colors
GetDocumentColorPreferences();
// The system color values are computed to colors in the style data,
// so normal style data comparison is sufficient here.
RebuildAllStyleData(nsChangeHint(0));
}
void
nsPresContext::UIResolutionChanged()
{
if (!mPendingUIResolutionChanged) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::UIResolutionChangedInternal);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingUIResolutionChanged = true;
}
}
}
/*static*/ bool
nsPresContext::UIResolutionChangedSubdocumentCallback(nsIDocument* aDocument,
void* aData)
{
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
nsPresContext* pc = shell->GetPresContext();
if (pc) {
pc->UIResolutionChangedInternal();
}
}
return true;
}
void
nsPresContext::UIResolutionChangedInternal()
{
mPendingUIResolutionChanged = false;
mDeviceContext->CheckDPIChange();
if (mCurAppUnitsPerDevPixel != AppUnitsPerDevPixel()) {
AppUnitsPerDevPixelChanged();
}
mDocument->EnumerateSubDocuments(UIResolutionChangedSubdocumentCallback,
nullptr);
}
void
nsPresContext::EmulateMedium(const nsAString& aMediaType)
{
nsIAtom* previousMedium = Medium();
mIsEmulatingMedia = true;
nsAutoString mediaType;
nsContentUtils::ASCIIToLower(aMediaType, mediaType);
mMediaEmulated = do_GetAtom(mediaType);
if (mMediaEmulated != previousMedium && mShell) {
MediaFeatureValuesChanged(eRebuildStyleIfNeeded, nsChangeHint(0));
}
}
void nsPresContext::StopEmulatingMedium()
{
nsIAtom* previousMedium = Medium();
mIsEmulatingMedia = false;
if (Medium() != previousMedium) {
MediaFeatureValuesChanged(eRebuildStyleIfNeeded, nsChangeHint(0));
}
}
void
nsPresContext::RebuildAllStyleData(nsChangeHint aExtraHint)
{
if (!mShell) {
// We must have been torn down. Nothing to do here.
return;
}
mUsesRootEMUnits = false;
mUsesViewportUnits = false;
RebuildUserFontSet();
RestyleManager()->RebuildAllStyleData(aExtraHint);
}
void
nsPresContext::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint)
{
if (!mShell) {
// We must have been torn down. Nothing to do here.
return;
}
RestyleManager()->PostRebuildAllStyleDataEvent(aExtraHint);
}
void
nsPresContext::MediaFeatureValuesChanged(StyleRebuildType aShouldRebuild,
nsChangeHint aChangeHint)
{
NS_ASSERTION(aShouldRebuild == eAlwaysRebuildStyle || aChangeHint == 0,
"If you don't know if we need a rebuild, how can you provide a hint?");
mPendingMediaFeatureValuesChanged = false;
// MediumFeaturesChanged updates the applied rules, so it always gets called.
bool mediaFeaturesDidChange = mShell ? mShell->StyleSet()->MediumFeaturesChanged(this)
: false;
if (aShouldRebuild == eAlwaysRebuildStyle ||
mediaFeaturesDidChange ||
(mUsesViewportUnits && mPendingViewportChange)) {
RebuildAllStyleData(aChangeHint);
}
mPendingViewportChange = false;
if (!nsContentUtils::IsSafeToRunScript()) {
NS_ABORT_IF_FALSE(mDocument->IsBeingUsedAsImage(),
"How did we get here? Are we failing to notify "
"listeners that we should notify?");
return;
}
// Media query list listeners should be notified from a queued task
// (in HTML5 terms), although we also want to notify them on certain
// flushes. (We're already running off an event.)
//
// Note that we do this after the new style from media queries in
// style sheets has been computed.
if (!PR_CLIST_IS_EMPTY(&mDOMMediaQueryLists)) {
// We build a list of all the notifications we're going to send
// before we send any of them. (The spec says the notifications
// should be a queued task, so any removals that happen during the
// notifications shouldn't affect what gets notified.) Furthermore,
// we hold strong pointers to everything we're going to make
// notification calls to, since each notification involves calling
// arbitrary script that might otherwise destroy these objects, or,
// for that matter, |this|.
//
// Note that we intentionally send the notifications to media query
// list in the order they were created and, for each list, to the
// listeners in the order added.
nsDOMMediaQueryList::NotifyList notifyList;
for (PRCList *l = PR_LIST_HEAD(&mDOMMediaQueryLists);
l != &mDOMMediaQueryLists; l = PR_NEXT_LINK(l)) {
nsDOMMediaQueryList *mql = static_cast<nsDOMMediaQueryList*>(l);
mql->MediumFeaturesChanged(notifyList);
}
if (!notifyList.IsEmpty()) {
nsPIDOMWindow *win = mDocument->GetInnerWindow();
nsCOMPtr<EventTarget> et = do_QueryInterface(win);
nsCxPusher pusher;
for (uint32_t i = 0, i_end = notifyList.Length(); i != i_end; ++i) {
if (pusher.RePush(et)) {
nsAutoMicroTask mt;
nsDOMMediaQueryList::HandleChangeData &d = notifyList[i];
d.listener->HandleChange(d.mql);
}
}
}
// NOTE: When |notifyList| goes out of scope, our destructor could run.
}
}
void
nsPresContext::PostMediaFeatureValuesChangedEvent()
{
// FIXME: We should probably replace this event with use of
// nsRefreshDriver::AddStyleFlushObserver (except the pres shell would
// need to track whether it's been added).
if (!mPendingMediaFeatureValuesChanged) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::HandleMediaFeatureValuesChangedEvent);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingMediaFeatureValuesChanged = true;
mDocument->SetNeedStyleFlush();
}
}
}
void
nsPresContext::HandleMediaFeatureValuesChangedEvent()
{
// Null-check mShell in case the shell has been destroyed (and the
// event is the only thing holding the pres context alive).
if (mPendingMediaFeatureValuesChanged && mShell) {
MediaFeatureValuesChanged(eRebuildStyleIfNeeded);
}
}
void
nsPresContext::MatchMedia(const nsAString& aMediaQueryList,
nsIDOMMediaQueryList** aResult)
{
nsRefPtr<nsDOMMediaQueryList> result =
new nsDOMMediaQueryList(this, aMediaQueryList);
// Insert the new item at the end of the linked list.
PR_INSERT_BEFORE(result, &mDOMMediaQueryLists);
result.forget(aResult);
}
nsCompatibility
nsPresContext::CompatibilityMode() const
{
return Document()->GetCompatibilityMode();
}
void
nsPresContext::SetPaginatedScrolling(bool aPaginated)
{
if (mType == eContext_PrintPreview || mType == eContext_PageLayout)
mCanPaginatedScroll = aPaginated;
}
void
nsPresContext::SetPrintSettings(nsIPrintSettings *aPrintSettings)
{
if (mMedium == nsGkAtoms::print)
mPrintSettings = aPrintSettings;
}
bool
nsPresContext::EnsureVisible()
{
nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mContainer));
if (docShell) {
nsCOMPtr<nsIContentViewer> cv;
docShell->GetContentViewer(getter_AddRefs(cv));
// Make sure this is the content viewer we belong with
if (cv) {
nsRefPtr<nsPresContext> currentPresContext;
cv->GetPresContext(getter_AddRefs(currentPresContext));
if (currentPresContext == this) {
// OK, this is us. We want to call Show() on the content viewer.
nsresult result = cv->Show();
if (NS_SUCCEEDED(result)) {
return true;
}
}
}
}
return false;
}
#ifdef MOZ_REFLOW_PERF
void
nsPresContext::CountReflows(const char * aName, nsIFrame * aFrame)
{
if (mShell) {
mShell->CountReflows(aName, aFrame);
}
}
#endif
bool
nsPresContext::IsChromeSlow() const
{
bool isChrome = false;
nsCOMPtr<nsISupports> container = GetContainer();
if (container) {
nsresult result;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell) {
int32_t docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)) {
isChrome = nsIDocShellTreeItem::typeChrome == docShellType;
}
}
}
mIsChrome = isChrome;
mIsChromeIsCached = true;
return mIsChrome;
}
void
nsPresContext::InvalidateIsChromeCacheExternal()
{
InvalidateIsChromeCacheInternal();
}
/* virtual */ bool
nsPresContext::HasAuthorSpecifiedRules(nsIFrame *aFrame, uint32_t ruleTypeMask) const
{
return
nsRuleNode::HasAuthorSpecifiedRules(aFrame->StyleContext(),
ruleTypeMask,
UseDocumentColors());
}
gfxUserFontSet*
nsPresContext::GetUserFontSetInternal()
{
// We want to initialize the user font set lazily the first time the
// user asks for it, rather than building it too early and forcing
// rule cascade creation. Thus we try to enforce the invariant that
// we *never* build the user font set until the first call to
// GetUserFontSet. However, once it's been requested, we can't wait
// for somebody to call GetUserFontSet in order to rebuild it (see
// comments below in RebuildUserFontSet for why).
#ifdef DEBUG
bool userFontSetGottenBefore = mGetUserFontSetCalled;
#endif
// Set mGetUserFontSetCalled up front, so that FlushUserFontSet will actually
// flush.
mGetUserFontSetCalled = true;
if (mUserFontSetDirty) {
// If this assertion fails, and there have actually been changes to
// @font-face rules, then we will call StyleChangeReflow in
// FlushUserFontSet. If we're in the middle of reflow,
// that's a bad thing to do, and the caller was responsible for
// flushing first. If we're not (e.g., in frame construction), it's
// ok.
NS_ASSERTION(!userFontSetGottenBefore || !mShell->IsReflowLocked(),
"FlushUserFontSet should have been called first");
FlushUserFontSet();
}
return mUserFontSet;
}
gfxUserFontSet*
nsPresContext::GetUserFontSetExternal()
{
return GetUserFontSetInternal();
}
void
nsPresContext::FlushUserFontSet()
{
if (!mShell) {
return; // we've been torn down
}
if (!mGetUserFontSetCalled) {
return; // No one cares about this font set yet, but we want to be careful
// to not unset our mUserFontSetDirty bit, so when someone really
// does we'll create it.
}
if (mUserFontSetDirty) {
if (gfxPlatform::GetPlatform()->DownloadableFontsEnabled()) {
nsTArray<nsFontFaceRuleContainer> rules;
if (!mShell->StyleSet()->AppendFontFaceRules(this, rules)) {
if (mUserFontSet) {
mUserFontSet->Destroy();
NS_RELEASE(mUserFontSet);
}
return;
}
bool changed = false;
if (rules.Length() == 0) {
if (mUserFontSet) {
mUserFontSet->Destroy();
NS_RELEASE(mUserFontSet);
changed = true;
}
} else {
if (!mUserFontSet) {
mUserFontSet = new nsUserFontSet(this);
NS_ADDREF(mUserFontSet);
}
changed = mUserFontSet->UpdateRules(rules);
}
// We need to enqueue a style change reflow (for later) to
// reflect that we're modifying @font-face rules. (However,
// without a reflow, nothing will happen to start any downloads
// that are needed.)
if (changed) {
UserFontSetUpdated();
}
}
mUserFontSetDirty = false;
}
}
void
nsPresContext::RebuildUserFontSet()
{
if (!mGetUserFontSetCalled) {
// We want to lazily build the user font set the first time it's
// requested (so we don't force creation of rule cascades too
// early), so don't do anything now.
return;
}
mUserFontSetDirty = true;
mDocument->SetNeedStyleFlush();
// Somebody has already asked for the user font set, so we need to
// post an event to rebuild it. Setting the user font set to be dirty
// and lazily rebuilding it isn't sufficient, since it is only the act
// of rebuilding it that will trigger the style change reflow that
// calls GetUserFontSet. (This reflow causes rebuilding of text runs,
// which starts font loads, whose completion causes another style
// change reflow).
if (!mPostedFlushUserFontSet) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::HandleRebuildUserFontSet);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPostedFlushUserFontSet = true;
}
}
}
void
nsPresContext::UserFontSetUpdated()
{
if (!mShell)
return;
// Changes to the set of available fonts can cause updates to layout by:
//
// 1. Changing the font used for text, which changes anything that
// depends on text measurement, including line breaking and
// intrinsic widths, and any other parts of layout that depend on
// font metrics. This requires a style change reflow to update.
//
// 2. Changing the value of the 'ex' and 'ch' units in style data,
// which also depend on font metrics. Updating this information
// requires rebuilding the rule tree from the top, avoiding the
// reuse of cached data even when no style rules have changed.
PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW);
}
bool
nsPresContext::EnsureSafeToHandOutCSSRules()
{
nsCSSStyleSheet::EnsureUniqueInnerResult res =
mShell->StyleSet()->EnsureUniqueInnerOnCSSSheets();
if (res == nsCSSStyleSheet::eUniqueInner_AlreadyUnique) {
// Nothing to do.
return true;
}
if (res == nsCSSStyleSheet::eUniqueInner_CloneFailed) {
return false;
}
NS_ABORT_IF_FALSE(res == nsCSSStyleSheet::eUniqueInner_ClonedInner,
"unexpected result");
RebuildAllStyleData(nsChangeHint(0));
return true;
}
void
nsPresContext::FireDOMPaintEvent(nsInvalidateRequestList* aList)
{
nsPIDOMWindow* ourWindow = mDocument->GetWindow();
if (!ourWindow)
return;
nsCOMPtr<EventTarget> dispatchTarget = do_QueryInterface(ourWindow);
nsCOMPtr<EventTarget> eventTarget = dispatchTarget;
if (!IsChrome() && !mSendAfterPaintToContent) {
// Don't tell the window about this event, it should not know that
// something happened in a subdocument. Tell only the chrome event handler.
// (Events sent to the window get propagated to the chrome event handler
// automatically.)
dispatchTarget = do_QueryInterface(ourWindow->GetParentTarget());
if (!dispatchTarget) {
return;
}
}
// Events sent to the window get propagated to the chrome event handler
// automatically.
nsCOMPtr<nsIDOMEvent> event;
// This will empty our list in case dispatching the event causes more damage
// (hopefully it won't, or we're likely to get an infinite loop! At least
// it won't be blocking app execution though).
NS_NewDOMNotifyPaintEvent(getter_AddRefs(event), eventTarget, this, nullptr,
NS_AFTERPAINT, aList);
if (!event) {
return;
}
// Even if we're not telling the window about the event (so eventTarget is
// the chrome event handler, not the window), the window is still
// logically the event target.
event->SetTarget(eventTarget);
event->SetTrusted(true);
nsEventDispatcher::DispatchDOMEvent(dispatchTarget, nullptr, event, this, nullptr);
}
static bool
MayHavePaintEventListenerSubdocumentCallback(nsIDocument* aDocument, void* aData)
{
bool *result = static_cast<bool*>(aData);
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
nsPresContext* pc = shell->GetPresContext();
if (pc) {
*result = pc->MayHavePaintEventListenerInSubDocument();
// If we found a paint event listener, then we can stop enumerating
// sub documents.
return !*result;
}
}
return true;
}
static bool
MayHavePaintEventListener(nsPIDOMWindow* aInnerWindow)
{
if (!aInnerWindow)
return false;
if (aInnerWindow->HasPaintEventListeners())
return true;
EventTarget* parentTarget = aInnerWindow->GetParentTarget();
if (!parentTarget)
return false;
nsEventListenerManager* manager = nullptr;
if ((manager = parentTarget->GetListenerManager(false)) &&
manager->MayHavePaintEventListener()) {
return true;
}
nsCOMPtr<nsINode> node;
if (parentTarget != aInnerWindow->GetChromeEventHandler()) {
nsCOMPtr<nsIInProcessContentFrameMessageManager> mm =
do_QueryInterface(parentTarget);
if (mm) {
node = mm->GetOwnerContent();
}
}
if (!node) {
node = do_QueryInterface(parentTarget);
}
if (node)
return MayHavePaintEventListener(node->OwnerDoc()->GetInnerWindow());
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(parentTarget);
if (window)
return MayHavePaintEventListener(window);
nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(parentTarget);
EventTarget* tabChildGlobal;
return root &&
(tabChildGlobal = root->GetParentTarget()) &&
(manager = tabChildGlobal->GetListenerManager(false)) &&
manager->MayHavePaintEventListener();
}
bool
nsPresContext::MayHavePaintEventListener()
{
return ::MayHavePaintEventListener(mDocument->GetInnerWindow());
}
bool
nsPresContext::MayHavePaintEventListenerInSubDocument()
{
if (MayHavePaintEventListener()) {
return true;
}
bool result = false;
mDocument->EnumerateSubDocuments(MayHavePaintEventListenerSubdocumentCallback, &result);
return result;
}
void
nsPresContext::NotifyInvalidation(uint32_t aFlags)
{
nsIFrame* rootFrame = PresShell()->FrameManager()->GetRootFrame();
NotifyInvalidation(rootFrame->GetVisualOverflowRect(), aFlags);
mAllInvalidated = true;
}
void
nsPresContext::NotifyInvalidation(const nsIntRect& aRect, uint32_t aFlags)
{
nsRect rect(DevPixelsToAppUnits(aRect.x),
DevPixelsToAppUnits(aRect.y),
DevPixelsToAppUnits(aRect.width),
DevPixelsToAppUnits(aRect.height));
NotifyInvalidation(rect, aFlags);
}
void
nsPresContext::NotifyInvalidation(const nsRect& aRect, uint32_t aFlags)
{
// If there is no paint event listener, then we don't need to fire
// the asynchronous event. We don't even need to record invalidation.
// MayHavePaintEventListener is pretty cheap and we could make it
// even cheaper by providing a more efficient
// nsPIDOMWindow::GetListenerManager.
if (mAllInvalidated) {
return;
}
nsPresContext* pc;
for (pc = this; pc; pc = pc->GetParentPresContext()) {
if (pc->mFireAfterPaintEvents)
break;
pc->mFireAfterPaintEvents = true;
}
if (!pc) {
nsRootPresContext* rpc = GetRootPresContext();
if (rpc) {
rpc->EnsureEventualDidPaintEvent();
}
}
nsInvalidateRequestList::Request* request =
mInvalidateRequestsSinceLastPaint.mRequests.AppendElement();
if (!request)
return;
request->mRect = aRect;
request->mFlags = aFlags;
}
/* static */ void
nsPresContext::NotifySubDocInvalidation(ContainerLayer* aContainer,
const nsIntRegion& aRegion)
{
ContainerLayerPresContext *data =
static_cast<ContainerLayerPresContext*>(
aContainer->GetUserData(&gNotifySubDocInvalidationData));
if (!data) {
return;
}
nsIntPoint topLeft = aContainer->GetVisibleRegion().GetBounds().TopLeft();
nsIntRegionRectIterator iter(aRegion);
while (const nsIntRect* r = iter.Next()) {
nsIntRect rect = *r;
//PresContext coordinate space is relative to the start of our visible
// region. Is this really true? This feels like the wrong way to get the right
// answer.
rect.MoveBy(-topLeft);
data->mPresContext->NotifyInvalidation(rect, 0);
}
}
void
nsPresContext::SetNotifySubDocInvalidationData(ContainerLayer* aContainer)
{
ContainerLayerPresContext* pres = new ContainerLayerPresContext;
pres->mPresContext = this;
aContainer->SetUserData(&gNotifySubDocInvalidationData, pres);
}
/* static */ void
nsPresContext::ClearNotifySubDocInvalidationData(ContainerLayer* aContainer)
{
aContainer->SetUserData(&gNotifySubDocInvalidationData, nullptr);
}
struct NotifyDidPaintSubdocumentCallbackClosure {
uint32_t mFlags;
bool mNeedsAnotherDidPaintNotification;
};
static bool
NotifyDidPaintSubdocumentCallback(nsIDocument* aDocument, void* aData)
{
NotifyDidPaintSubdocumentCallbackClosure* closure =
static_cast<NotifyDidPaintSubdocumentCallbackClosure*>(aData);
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
nsPresContext* pc = shell->GetPresContext();
if (pc) {
pc->NotifyDidPaintForSubtree(closure->mFlags);
if (pc->IsDOMPaintEventPending()) {
closure->mNeedsAnotherDidPaintNotification = true;
}
}
}
return true;
}
class DelayedFireDOMPaintEvent : public nsRunnable {
public:
DelayedFireDOMPaintEvent(nsPresContext* aPresContext,
nsInvalidateRequestList* aList)
: mPresContext(aPresContext)
{
mList.TakeFrom(aList);
}
NS_IMETHOD Run()
{
mPresContext->FireDOMPaintEvent(&mList);
return NS_OK;
}
nsRefPtr<nsPresContext> mPresContext;
nsInvalidateRequestList mList;
};
void
nsPresContext::NotifyDidPaintForSubtree(uint32_t aFlags)
{
if (IsRoot()) {
static_cast<nsRootPresContext*>(this)->CancelDidPaintTimer();
if (!mFireAfterPaintEvents) {
return;
}
}
// Non-root prescontexts fire MozAfterPaint to all their descendants
// unconditionally, even if no invalidations have been collected. This is
// because we don't want to eat the cost of collecting invalidations for
// every subdocument (which would require putting every subdocument in its
// own layer).
if (aFlags & nsIPresShell::PAINT_LAYERS) {
mUndeliveredInvalidateRequestsBeforeLastPaint.TakeFrom(
&mInvalidateRequestsSinceLastPaint);
mAllInvalidated = false;
}
if (aFlags & nsIPresShell::PAINT_COMPOSITE) {
nsCOMPtr<nsIRunnable> ev =
new DelayedFireDOMPaintEvent(this, &mUndeliveredInvalidateRequestsBeforeLastPaint);
nsContentUtils::AddScriptRunner(ev);
}
NotifyDidPaintSubdocumentCallbackClosure closure = { aFlags, false };
mDocument->EnumerateSubDocuments(NotifyDidPaintSubdocumentCallback, &closure);
if (!closure.mNeedsAnotherDidPaintNotification &&
mInvalidateRequestsSinceLastPaint.IsEmpty() &&
mUndeliveredInvalidateRequestsBeforeLastPaint.IsEmpty()) {
// Nothing more to do for the moment.
mFireAfterPaintEvents = false;
} else {
if (IsRoot()) {
static_cast<nsRootPresContext*>(this)->EnsureEventualDidPaintEvent();
}
}
}
bool
nsPresContext::HasCachedStyleData()
{
return mShell && mShell->StyleSet()->HasCachedStyleData();
}
static bool sGotInterruptEnv = false;
enum InterruptMode {
ModeRandom,
ModeCounter,
ModeEvent
};
// Controlled by the GECKO_REFLOW_INTERRUPT_MODE env var; allowed values are
// "random" (except on Windows) or "counter". If neither is used, the mode is
// ModeEvent.
static InterruptMode sInterruptMode = ModeEvent;
#ifndef XP_WIN
// Used for the "random" mode. Controlled by the GECKO_REFLOW_INTERRUPT_SEED
// env var.
static uint32_t sInterruptSeed = 1;
#endif
// Used for the "counter" mode. This is the number of unskipped interrupt
// checks that have to happen before we interrupt. Controlled by the
// GECKO_REFLOW_INTERRUPT_FREQUENCY env var.
static uint32_t sInterruptMaxCounter = 10;
// Used for the "counter" mode. This counts up to sInterruptMaxCounter and is
// then reset to 0.
static uint32_t sInterruptCounter;
// Number of interrupt checks to skip before really trying to interrupt.
// Controlled by the GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP env var.
static uint32_t sInterruptChecksToSkip = 200;
// Number of milliseconds that a reflow should be allowed to run for before we
// actually allow interruption. Controlled by the
// GECKO_REFLOW_MIN_NOINTERRUPT_DURATION env var. Can't be initialized here,
// because TimeDuration/TimeStamp is not safe to use in static constructors..
static TimeDuration sInterruptTimeout;
static void GetInterruptEnv()
{
char *ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_MODE");
if (ev) {
#ifndef XP_WIN
if (PL_strcasecmp(ev, "random") == 0) {
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_SEED");
if (ev) {
sInterruptSeed = atoi(ev);
}
srandom(sInterruptSeed);
sInterruptMode = ModeRandom;
} else
#endif
if (PL_strcasecmp(ev, "counter") == 0) {
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_FREQUENCY");
if (ev) {
sInterruptMaxCounter = atoi(ev);
}
sInterruptCounter = 0;
sInterruptMode = ModeCounter;
}
}
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP");
if (ev) {
sInterruptChecksToSkip = atoi(ev);
}
ev = PR_GetEnv("GECKO_REFLOW_MIN_NOINTERRUPT_DURATION");
int duration_ms = ev ? atoi(ev) : 100;
sInterruptTimeout = TimeDuration::FromMilliseconds(duration_ms);
}
bool
nsPresContext::HavePendingInputEvent()
{
switch (sInterruptMode) {
#ifndef XP_WIN
case ModeRandom:
return (random() & 1);
#endif
case ModeCounter:
if (sInterruptCounter < sInterruptMaxCounter) {
++sInterruptCounter;
return false;
}
sInterruptCounter = 0;
return true;
default:
case ModeEvent: {
nsIFrame* f = PresShell()->GetRootFrame();
if (f) {
nsIWidget* w = f->GetNearestWidget();
if (w) {
return w->HasPendingInputEvent();
}
}
return false;
}
}
}
void
nsPresContext::ReflowStarted(bool aInterruptible)
{
#ifdef NOISY_INTERRUPTIBLE_REFLOW
if (!aInterruptible) {
printf("STARTING NONINTERRUPTIBLE REFLOW\n");
}
#endif
// We don't support interrupting in paginated contexts, since page
// sequences only handle initial reflow
mInterruptsEnabled = aInterruptible && !IsPaginated();
// Don't set mHasPendingInterrupt based on HavePendingInputEvent() here. If
// we ever change that, then we need to update the code in
// PresShell::DoReflow to only add the just-reflown root to dirty roots if
// it's actually dirty. Otherwise we can end up adding a root that has no
// interruptible descendants, just because we detected an interrupt at reflow
// start.
mHasPendingInterrupt = false;
mInterruptChecksToSkip = sInterruptChecksToSkip;
if (mInterruptsEnabled) {
mReflowStartTime = TimeStamp::Now();
}
}
bool
nsPresContext::CheckForInterrupt(nsIFrame* aFrame)
{
if (mHasPendingInterrupt) {
mShell->FrameNeedsToContinueReflow(aFrame);
return true;
}
if (!sGotInterruptEnv) {
sGotInterruptEnv = true;
GetInterruptEnv();
}
if (!mInterruptsEnabled) {
return false;
}
if (mInterruptChecksToSkip > 0) {
--mInterruptChecksToSkip;
return false;
}
mInterruptChecksToSkip = sInterruptChecksToSkip;
// Don't interrupt if it's been less than sInterruptTimeout since we started
// the reflow.
mHasPendingInterrupt =
TimeStamp::Now() - mReflowStartTime > sInterruptTimeout &&
HavePendingInputEvent() &&
!IsChrome();
if (mHasPendingInterrupt) {
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("*** DETECTED pending interrupt (time=%lld)\n", PR_Now());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
mShell->FrameNeedsToContinueReflow(aFrame);
}
return mHasPendingInterrupt;
}
nsIFrame*
nsPresContext::GetPrimaryFrameFor(nsIContent* aContent)
{
NS_PRECONDITION(aContent, "Don't do that");
if (GetPresShell() &&
GetPresShell()->GetDocument() == aContent->GetCurrentDoc()) {
return aContent->GetPrimaryFrame();
}
return nullptr;
}
size_t
nsPresContext::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
return mPropertyTable.SizeOfExcludingThis(aMallocSizeOf);
mLangGroupFontPrefs.SizeOfExcludingThis(aMallocSizeOf);
// Measurement of other members may be added later if DMD finds it is
// worthwhile.
}
bool
nsPresContext::IsRootContentDocument()
{
// We are a root content document if: we are not a resource doc, we are
// not chrome, and we either have no parent or our parent is chrome.
if (mDocument->IsResourceDoc()) {
return false;
}
if (IsChrome()) {
return false;
}
// We may not have a root frame, so use views.
nsView* view = PresShell()->GetViewManager()->GetRootView();
if (!view) {
return false;
}
view = view->GetParent(); // anonymous inner view
if (!view) {
return true;
}
view = view->GetParent(); // subdocumentframe's view
if (!view) {
return true;
}
nsIFrame* f = view->GetFrame();
return (f && f->PresContext()->IsChrome());
}
bool
nsPresContext::IsCrossProcessRootContentDocument()
{
if (!IsRootContentDocument()) {
return false;
}
if (XRE_GetProcessType() == GeckoProcessType_Default) {
return true;
}
TabChild* tabChild = TabChild::GetFrom(mShell);
return (tabChild && tabChild->IsRootContentDocument());
}
bool nsPresContext::GetPaintFlashing() const
{
if (!mPaintFlashingInitialized) {
bool pref = Preferences::GetBool("nglayout.debug.paint_flashing");
if (!pref && IsChrome()) {
pref = Preferences::GetBool("nglayout.debug.paint_flashing_chrome");
}
mPaintFlashing = pref;
mPaintFlashingInitialized = true;
}
return mPaintFlashing;
}
nsRootPresContext::nsRootPresContext(nsIDocument* aDocument,
nsPresContextType aType)
: nsPresContext(aDocument, aType),
mDOMGeneration(0)
{
}
nsRootPresContext::~nsRootPresContext()
{
NS_ASSERTION(mRegisteredPlugins.Count() == 0,
"All plugins should have been unregistered");
CancelDidPaintTimer();
CancelApplyPluginGeometryTimer();
}
void
nsRootPresContext::RegisterPluginForGeometryUpdates(nsIContent* aPlugin)
{
mRegisteredPlugins.PutEntry(aPlugin);
}
void
nsRootPresContext::UnregisterPluginForGeometryUpdates(nsIContent* aPlugin)
{
mRegisteredPlugins.RemoveEntry(aPlugin);
}
static PLDHashOperator
SetPluginHidden(nsRefPtrHashKey<nsIContent>* aEntry, void* userArg)
{
nsIFrame* root = static_cast<nsIFrame*>(userArg);
nsObjectFrame* f = static_cast<nsObjectFrame*>(aEntry->GetKey()->GetPrimaryFrame());
if (!f) {
NS_WARNING("Null frame in SetPluginHidden");
return PL_DHASH_NEXT;
}
if (!nsLayoutUtils::IsAncestorFrameCrossDoc(root, f)) {
// f is not managed by this frame so we should ignore it.
return PL_DHASH_NEXT;
}
f->SetEmptyWidgetConfiguration();
return PL_DHASH_NEXT;
}
void
nsRootPresContext::ComputePluginGeometryUpdates(nsIFrame* aFrame,
nsDisplayListBuilder* aBuilder,
nsDisplayList* aList)
{
if (mRegisteredPlugins.Count() == 0) {
return;
}
// Initially make the next state for each plugin descendant of aFrame be
// "hidden". Plugins that are visible will have their next state set to
// unhidden by nsDisplayPlugin::ComputeVisibility.
mRegisteredPlugins.EnumerateEntries(SetPluginHidden, aFrame);
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame && aBuilder->ContainsPluginItem()) {
aBuilder->SetForPluginGeometry();
aBuilder->SetAccurateVisibleRegions();
// Merging and flattening has already been done and we should not do it
// again. nsDisplayScroll(Info)Layer doesn't support trying to flatten
// again.
aBuilder->SetAllowMergingAndFlattening(false);
nsRegion region = rootFrame->GetVisualOverflowRectRelativeToSelf();
// nsDisplayPlugin::ComputeVisibility will automatically set a non-hidden
// widget configuration for the plugin, if it's visible.
aList->ComputeVisibilityForRoot(aBuilder, &region);
}
#ifdef XP_MACOSX
// We control painting of Mac plugins, so just apply geometry updates now.
// This is not happening during a paint event.
ApplyPluginGeometryUpdates();
#else
InitApplyPluginGeometryTimer();
#endif
}
static void
ApplyPluginGeometryUpdatesCallback(nsITimer *aTimer, void *aClosure)
{
static_cast<nsRootPresContext*>(aClosure)->ApplyPluginGeometryUpdates();
}
void
nsRootPresContext::InitApplyPluginGeometryTimer()
{
if (mApplyPluginGeometryTimer) {
return;
}
// We'll apply the plugin geometry updates during the next compositing paint in this
// presContext (either from nsPresShell::WillPaintWindow or from
// nsPresShell::DidPaintWindow, depending on the platform). But paints might
// get optimized away if the old plugin geometry covers the invalid region,
// so set a backup timer to do this too. We want to make sure this
// won't fire before our normal paint notifications, if those would
// update the geometry, so set it for double the refresh driver interval.
mApplyPluginGeometryTimer = do_CreateInstance("@mozilla.org/timer;1");
if (mApplyPluginGeometryTimer) {
mApplyPluginGeometryTimer->
InitWithFuncCallback(ApplyPluginGeometryUpdatesCallback, this,
nsRefreshDriver::DefaultInterval() * 2,
nsITimer::TYPE_ONE_SHOT);
}
}
void
nsRootPresContext::CancelApplyPluginGeometryTimer()
{
if (mApplyPluginGeometryTimer) {
mApplyPluginGeometryTimer->Cancel();
mApplyPluginGeometryTimer = nullptr;
}
}
static bool
HasOverlap(const nsIntPoint& aOffset1, const nsTArray<nsIntRect>& aClipRects1,
const nsIntPoint& aOffset2, const nsTArray<nsIntRect>& aClipRects2)
{
nsIntPoint offsetDelta = aOffset1 - aOffset2;
for (uint32_t i = 0; i < aClipRects1.Length(); ++i) {
for (uint32_t j = 0; j < aClipRects2.Length(); ++j) {
if ((aClipRects1[i] + offsetDelta).Intersects(aClipRects2[j]))
return true;
}
}
return false;
}
/**
* Given a list of plugin windows to move to new locations, sort the list
* so that for each window move, the window moves to a location that
* does not intersect other windows. This minimizes flicker and repainting.
* It's not always possible to do this perfectly, since in general
* we might have cycles. But we do our best.
* We need to take into account that windows are clipped to particular
* regions and the clip regions change as the windows are moved.
*/
static void
SortConfigurations(nsTArray<nsIWidget::Configuration>* aConfigurations)
{
if (aConfigurations->Length() > 10) {
// Give up, we don't want to get bogged down here
return;
}
nsTArray<nsIWidget::Configuration> pluginsToMove;
pluginsToMove.SwapElements(*aConfigurations);
// Our algorithm is quite naive. At each step we try to identify
// a window that can be moved to its new location that won't overlap
// any other windows at the new location. If there is no such
// window, we just move the last window in the list anyway.
while (!pluginsToMove.IsEmpty()) {
// Find a window whose destination does not overlap any other window
uint32_t i;
for (i = 0; i + 1 < pluginsToMove.Length(); ++i) {
nsIWidget::Configuration* config = &pluginsToMove[i];
bool foundOverlap = false;
for (uint32_t j = 0; j < pluginsToMove.Length(); ++j) {
if (i == j)
continue;
nsIntRect bounds;
pluginsToMove[j].mChild->GetBounds(bounds);
nsAutoTArray<nsIntRect,1> clipRects;
pluginsToMove[j].mChild->GetWindowClipRegion(&clipRects);
if (HasOverlap(bounds.TopLeft(), clipRects,
config->mBounds.TopLeft(),
config->mClipRegion)) {
foundOverlap = true;
break;
}
}
if (!foundOverlap)
break;
}
// Note that we always move the last plugin in pluginsToMove, if we
// can't find any other plugin to move
aConfigurations->AppendElement(pluginsToMove[i]);
pluginsToMove.RemoveElementAt(i);
}
}
static PLDHashOperator
PluginDidSetGeometryEnumerator(nsRefPtrHashKey<nsIContent>* aEntry, void* userArg)
{
nsObjectFrame* f = static_cast<nsObjectFrame*>(aEntry->GetKey()->GetPrimaryFrame());
if (!f) {
NS_WARNING("Null frame in PluginDidSetGeometryEnumerator");
return PL_DHASH_NEXT;
}
f->DidSetWidgetGeometry();
return PL_DHASH_NEXT;
}
struct PluginGetGeometryUpdateClosure {
nsTArray<nsIWidget::Configuration> mConfigurations;
};
static PLDHashOperator
PluginGetGeometryUpdate(nsRefPtrHashKey<nsIContent>* aEntry, void* userArg)
{
PluginGetGeometryUpdateClosure* closure =
static_cast<PluginGetGeometryUpdateClosure*>(userArg);
nsObjectFrame* f = static_cast<nsObjectFrame*>(aEntry->GetKey()->GetPrimaryFrame());
if (!f) {
NS_WARNING("Null frame in GetPluginGeometryUpdate");
return PL_DHASH_NEXT;
}
f->GetWidgetConfiguration(&closure->mConfigurations);
return PL_DHASH_NEXT;
}
void
nsRootPresContext::ApplyPluginGeometryUpdates()
{
CancelApplyPluginGeometryTimer();
PluginGetGeometryUpdateClosure closure;
mRegisteredPlugins.EnumerateEntries(PluginGetGeometryUpdate, &closure);
// Walk mRegisteredPlugins and ask each plugin for its configuration
if (!closure.mConfigurations.IsEmpty()) {
nsIWidget* widget = closure.mConfigurations[0].mChild->GetParent();
NS_ASSERTION(widget, "Plugins must have a parent window");
SortConfigurations(&closure.mConfigurations);
widget->ConfigureChildren(closure.mConfigurations);
}
mRegisteredPlugins.EnumerateEntries(PluginDidSetGeometryEnumerator, nullptr);
}
static void
NotifyDidPaintForSubtreeCallback(nsITimer *aTimer, void *aClosure)
{
nsPresContext* presContext = (nsPresContext*)aClosure;
nsAutoScriptBlocker blockScripts;
// This is a fallback if we don't get paint events for some reason
// so we'll just pretend both layer painting and compositing happened.
presContext->NotifyDidPaintForSubtree(
nsIPresShell::PAINT_LAYERS | nsIPresShell::PAINT_COMPOSITE);
}
void
nsRootPresContext::EnsureEventualDidPaintEvent()
{
if (mNotifyDidPaintTimer)
return;
mNotifyDidPaintTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mNotifyDidPaintTimer)
return;
mNotifyDidPaintTimer->InitWithFuncCallback(NotifyDidPaintForSubtreeCallback,
(void*)this, 100, nsITimer::TYPE_ONE_SHOT);
}
void
nsRootPresContext::AddWillPaintObserver(nsIRunnable* aRunnable)
{
if (!mWillPaintFallbackEvent.IsPending()) {
mWillPaintFallbackEvent = new RunWillPaintObservers(this);
NS_DispatchToMainThread(mWillPaintFallbackEvent.get());
}
mWillPaintObservers.AppendElement(aRunnable);
}
/**
* Run all runnables that need to get called before the next paint.
*/
void
nsRootPresContext::FlushWillPaintObservers()
{
mWillPaintFallbackEvent = nullptr;
nsTArray<nsCOMPtr<nsIRunnable> > observers;
observers.SwapElements(mWillPaintObservers);
for (uint32_t i = 0; i < observers.Length(); ++i) {
observers[i]->Run();
}
}
size_t
nsRootPresContext::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
return nsPresContext::SizeOfExcludingThis(aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mNotifyDidPaintTimer
// - mRegisteredPlugins
// - mWillPaintObservers
// - mWillPaintFallbackEvent
}
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