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gecko/layout/generic/nsSubDocumentFrame.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/. */
/*
* rendering object for replaced elements that contain a document, such
* as <frame>, <iframe>, and some <object>s
*/
#include "mozilla/layout/RenderFrameParent.h"
#include "nsSubDocumentFrame.h"
#include "nsCOMPtr.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsIDocShell.h"
#include "nsIDocShellLoadInfo.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocShellTreeNode.h"
#include "nsIDocShellTreeOwner.h"
#include "nsIBaseWindow.h"
#include "nsIContentViewer.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIComponentManager.h"
#include "nsFrameManager.h"
#include "nsIStreamListener.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsIDocument.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsGkAtoms.h"
#include "nsStyleCoord.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsFrameSetFrame.h"
#include "nsIDOMHTMLFrameElement.h"
#include "nsIDOMHTMLIFrameElement.h"
#include "nsIDOMXULElement.h"
#include "nsIScriptSecurityManager.h"
#include "nsXPIDLString.h"
#include "nsIScrollable.h"
#include "nsINameSpaceManager.h"
#include "nsWeakReference.h"
#include "nsIDOMWindow.h"
#include "nsDisplayList.h"
#include "nsUnicharUtils.h"
#include "nsIScrollableFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsLayoutUtils.h"
#include "FrameLayerBuilder.h"
#include "nsObjectFrame.h"
#include "nsIServiceManager.h"
#include "nsContentUtils.h"
#include "LayerTreeInvalidation.h"
using namespace mozilla;
using mozilla::layout::RenderFrameParent;
static nsIDocument*
GetDocumentFromView(nsIView* aView)
{
NS_PRECONDITION(aView, "");
nsIFrame* f = aView->GetFrame();
nsIPresShell* ps = f ? f->PresContext()->PresShell() : nullptr;
return ps ? ps->GetDocument() : nullptr;
}
class AsyncFrameInit;
nsSubDocumentFrame::nsSubDocumentFrame(nsStyleContext* aContext)
: nsLeafFrame(aContext)
, mIsInline(false)
, mPostedReflowCallback(false)
, mDidCreateDoc(false)
, mCallingShow(false)
{
}
#ifdef ACCESSIBILITY
a11y::AccType
nsSubDocumentFrame::AccessibleType()
{
return a11y::eOuterDocAccessible;
}
#endif
NS_QUERYFRAME_HEAD(nsSubDocumentFrame)
NS_QUERYFRAME_ENTRY(nsSubDocumentFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsLeafFrame)
class AsyncFrameInit : public nsRunnable
{
public:
AsyncFrameInit(nsIFrame* aFrame) : mFrame(aFrame) {}
NS_IMETHOD Run()
{
if (mFrame.IsAlive()) {
static_cast<nsSubDocumentFrame*>(mFrame.GetFrame())->ShowViewer();
}
return NS_OK;
}
private:
nsWeakFrame mFrame;
};
static void
InsertViewsInReverseOrder(nsIView* aSibling, nsIView* aParent);
static void
EndSwapDocShellsForViews(nsIView* aView);
NS_IMETHODIMP
nsSubDocumentFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
// determine if we are a <frame> or <iframe>
if (aContent) {
nsCOMPtr<nsIDOMHTMLFrameElement> frameElem = do_QueryInterface(aContent);
mIsInline = frameElem ? false : true;
}
nsresult rv = nsLeafFrame::Init(aContent, aParent, aPrevInFlow);
if (NS_FAILED(rv))
return rv;
// We are going to create an inner view. If we need a view for the
// OuterFrame but we wait for the normal view creation path in
// nsCSSFrameConstructor, then we will lose because the inner view's
// parent will already have been set to some outer view (e.g., the
// canvas) when it really needs to have this frame's view as its
// parent. So, create this frame's view right away, whether we
// really need it or not, and the inner view will get it as the
// parent.
if (!HasView()) {
rv = nsContainerFrame::CreateViewForFrame(this, true);
NS_ENSURE_SUCCESS(rv, rv);
}
EnsureInnerView();
// Set the primary frame now so that DocumentViewerImpl::FindContainerView
// called from within EndSwapDocShellsForViews below can find it if needed.
aContent->SetPrimaryFrame(this);
// If we have a detached subdoc's root view on our frame loader, re-insert
// it into the view tree. This happens when we've been reframed, and
// ensures the presentation persists across reframes. If the frame element
// has changed documents however, we blow away the presentation.
nsRefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsCOMPtr<nsIDocument> oldContainerDoc;
nsIView* detachedViews =
frameloader->GetDetachedSubdocView(getter_AddRefs(oldContainerDoc));
if (detachedViews) {
if (oldContainerDoc == aContent->OwnerDoc()) {
// Restore stashed presentation.
::InsertViewsInReverseOrder(detachedViews, mInnerView);
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
} else {
// Presentation is for a different document, don't restore it.
frameloader->Hide();
}
}
frameloader->SetDetachedSubdocView(nullptr, nullptr);
}
nsContentUtils::AddScriptRunner(new AsyncFrameInit(this));
return NS_OK;
}
inline int32_t ConvertOverflow(uint8_t aOverflow)
{
switch (aOverflow) {
case NS_STYLE_OVERFLOW_VISIBLE:
case NS_STYLE_OVERFLOW_AUTO:
return nsIScrollable::Scrollbar_Auto;
case NS_STYLE_OVERFLOW_HIDDEN:
case NS_STYLE_OVERFLOW_CLIP:
return nsIScrollable::Scrollbar_Never;
case NS_STYLE_OVERFLOW_SCROLL:
return nsIScrollable::Scrollbar_Always;
}
NS_NOTREACHED("invalid overflow value passed to ConvertOverflow");
return nsIScrollable::Scrollbar_Auto;
}
void
nsSubDocumentFrame::ShowViewer()
{
if (mCallingShow) {
return;
}
if (!PresContext()->IsDynamic()) {
// We let the printing code take care of loading the document; just
// create the inner view for it to use.
(void) EnsureInnerView();
} else {
nsRefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsIntSize margin = GetMarginAttributes();
const nsStyleDisplay* disp = GetStyleDisplay();
nsWeakFrame weakThis(this);
mCallingShow = true;
bool didCreateDoc =
frameloader->Show(margin.width, margin.height,
ConvertOverflow(disp->mOverflowX),
ConvertOverflow(disp->mOverflowY),
this);
if (!weakThis.IsAlive()) {
return;
}
mCallingShow = false;
mDidCreateDoc = didCreateDoc;
}
}
}
int
nsSubDocumentFrame::GetSkipSides() const
{
return 0;
}
nsIFrame*
nsSubDocumentFrame::GetSubdocumentRootFrame()
{
if (!mInnerView)
return nullptr;
nsIView* subdocView = mInnerView->GetFirstChild();
return subdocView ? subdocView->GetFrame() : nullptr;
}
bool
nsSubDocumentFrame::PassPointerEventsToChildren()
{
if (GetStyleVisibility()->mPointerEvents != NS_STYLE_POINTER_EVENTS_NONE) {
return true;
}
// Limit use of mozpasspointerevents to chrome documents, because
// this could be used by the parent document to discover which parts of the
// subdocument are transparent to events (if subdocument uses
// pointer-events:none on its root element, which is admittedly unlikely)
if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::mozpasspointerevents) &&
PresContext()->IsChrome()) {
return true;
}
return false;
}
NS_IMETHODIMP
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
// If mozpasspointerevents is set, then we should allow subdocument content
// to handle events even if we're pointer-events:none.
if (aBuilder->IsForEventDelivery() && !PassPointerEventsToChildren())
return NS_OK;
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (!mInnerView)
return NS_OK;
nsFrameLoader* frameLoader = FrameLoader();
if (frameLoader) {
RenderFrameParent* rfp = frameLoader->GetCurrentRemoteFrame();
if (rfp) {
return rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
}
}
nsIView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return NS_OK;
nsCOMPtr<nsIPresShell> presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsIView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nullptr;
if (nextView) {
frame = nextView->GetFrame();
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return NS_OK;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return NS_OK;
docShell->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_OK;
}
}
nsPresContext* presContext = presShell->GetPresContext();
nsDisplayList childItems;
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
if (subdocRootFrame) {
nsIDocument* doc = subdocRootFrame->PresContext()->Document();
nsIContent* root = doc ? doc->GetRootElement() : nullptr;
nsRect displayPort;
if (root && nsLayoutUtils::GetDisplayPort(root, &displayPort)) {
dirty = displayPort;
} else {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
nsRect subdocBoundsInParentUnits =
mInnerView->GetBounds() + aBuilder->ToReferenceFrame(this);
if (subdocRootFrame) {
rv = subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds;
if (subdocRootFrame) {
bounds = subdocBoundsInParentUnits.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
} else {
bounds = subdocBoundsInParentUnits;
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
rv = presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
rv = presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
bool addedLayer = false;
if (subdocRootFrame && parentAPD != subdocAPD) {
NS_WARN_IF_FALSE(!addedLayer,
"Two container layers have been added. "
"Performance may suffer.");
addedLayer = true;
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD,
nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(zoomItem);
}
if (!addedLayer && presContext->IsRootContentDocument()) {
// We always want top level content documents to be in their own layer.
nsDisplayOwnLayer* layerItem = new (aBuilder) nsDisplayOwnLayer(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(layerItem);
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
}
if (ShouldClipSubdocument()) {
nsDisplayClip* item =
new (aBuilder) nsDisplayClip(aBuilder, this, &childItems,
subdocBoundsInParentUnits);
// Clip children to the child root frame's rectangle
childItems.AppendToTop(item);
}
if (mIsInline) {
WrapReplacedContentForBorderRadius(aBuilder, &childItems, aLists);
} else {
aLists.Content()->AppendToTop(&childItems);
}
// delete childItems in case of OOM
childItems.DeleteAll();
return rv;
}
nscoord
nsSubDocumentFrame::GetIntrinsicWidth()
{
if (!IsInline()) {
return 0; // HTML <frame> has no useful intrinsic width
}
if (mContent->IsXUL()) {
return 0; // XUL <iframe> and <browser> have no useful intrinsic width
}
NS_ASSERTION(ObtainIntrinsicSizeFrame() == nullptr,
"Intrinsic width should come from the embedded document.");
// We must be an HTML <iframe>. Default to a width of 300, for IE
// compat (and per CSS2.1 draft).
return nsPresContext::CSSPixelsToAppUnits(300);
}
nscoord
nsSubDocumentFrame::GetIntrinsicHeight()
{
// <frame> processing does not use this routine, only <iframe>
NS_ASSERTION(IsInline(), "Shouldn't have been called");
if (mContent->IsXUL()) {
return 0;
}
NS_ASSERTION(ObtainIntrinsicSizeFrame() == nullptr,
"Intrinsic height should come from the embedded document.");
// Use 150px, for compatibility with IE, and per CSS2.1 draft.
return nsPresContext::CSSPixelsToAppUnits(150);
}
#ifdef DEBUG
NS_IMETHODIMP
nsSubDocumentFrame::List(FILE* out, int32_t aIndent, uint32_t aFlags) const
{
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", static_cast<void*>(mParent));
#endif
if (HasView()) {
fprintf(out, " [view=%p]", static_cast<void*>(GetView()));
}
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%016llx]", (unsigned long long)mState);
}
nsIFrame* prevInFlow = GetPrevInFlow();
nsIFrame* nextInFlow = GetNextInFlow();
if (nullptr != prevInFlow) {
fprintf(out, " prev-in-flow=%p", static_cast<void*>(prevInFlow));
}
if (nullptr != nextInFlow) {
fprintf(out, " next-in-flow=%p", static_cast<void*>(nextInFlow));
}
fprintf(out, " [content=%p]", static_cast<void*>(mContent));
nsSubDocumentFrame* f = const_cast<nsSubDocumentFrame*>(this);
if (f->HasOverflowAreas()) {
nsRect overflowArea = f->GetVisualOverflowRect();
fprintf(out, " [vis-overflow=%d,%d,%d,%d]", overflowArea.x, overflowArea.y,
overflowArea.width, overflowArea.height);
overflowArea = f->GetScrollableOverflowRect();
fprintf(out, " [scr-overflow=%d,%d,%d,%d]", overflowArea.x, overflowArea.y,
overflowArea.width, overflowArea.height);
}
fprintf(out, " [sc=%p]", static_cast<void*>(mStyleContext));
fputs("\n", out);
if (aFlags & TRAVERSE_SUBDOCUMENT_FRAMES) {
nsIFrame* subdocRootFrame = f->GetSubdocumentRootFrame();
if (subdocRootFrame) {
subdocRootFrame->List(out, aIndent + 1);
}
}
return NS_OK;
}
NS_IMETHODIMP nsSubDocumentFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("FrameOuter"), aResult);
}
#endif
nsIAtom*
nsSubDocumentFrame::GetType() const
{
return nsGkAtoms::subDocumentFrame;
}
/* virtual */ nscoord
nsSubDocumentFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
result = subDocRoot->GetMinWidth(aRenderingContext);
} else {
result = GetIntrinsicWidth();
}
return result;
}
/* virtual */ nscoord
nsSubDocumentFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
result = subDocRoot->GetPrefWidth(aRenderingContext);
} else {
result = GetIntrinsicWidth();
}
return result;
}
/* virtual */ nsIFrame::IntrinsicSize
nsSubDocumentFrame::GetIntrinsicSize()
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return subDocRoot->GetIntrinsicSize();
}
return nsLeafFrame::GetIntrinsicSize();
}
/* virtual */ nsSize
nsSubDocumentFrame::GetIntrinsicRatio()
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return subDocRoot->GetIntrinsicRatio();
}
return nsLeafFrame::GetIntrinsicRatio();
}
/* virtual */ nsSize
nsSubDocumentFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap)
{
if (!IsInline()) {
return nsFrame::ComputeAutoSize(aRenderingContext, aCBSize,
aAvailableWidth, aMargin, aBorder,
aPadding, aShrinkWrap);
}
return nsLeafFrame::ComputeAutoSize(aRenderingContext, aCBSize,
aAvailableWidth, aMargin, aBorder,
aPadding, aShrinkWrap);
}
/* virtual */ nsSize
nsSubDocumentFrame::ComputeSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder, nsSize aPadding,
uint32_t aFlags)
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(
aRenderingContext, this,
subDocRoot->GetIntrinsicSize(),
subDocRoot->GetIntrinsicRatio(),
aCBSize, aMargin, aBorder, aPadding);
}
return nsLeafFrame::ComputeSize(aRenderingContext, aCBSize, aAvailableWidth,
aMargin, aBorder, aPadding, aFlags);
}
NS_IMETHODIMP
nsSubDocumentFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsSubDocumentFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
// printf("OuterFrame::Reflow %X (%d,%d) \n", this, aReflowState.availableWidth, aReflowState.availableHeight);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsSubDocumentFrame::Reflow: maxSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
aStatus = NS_FRAME_COMPLETE;
NS_ASSERTION(mContent->GetPrimaryFrame() == this,
"Shouldn't happen");
// "offset" is the offset of our content area from our frame's
// top-left corner.
nsPoint offset(0, 0);
if (IsInline()) {
// XUL <iframe> or <browser>, or HTML <iframe>, <object> or <embed>
nsresult rv = nsLeafFrame::DoReflow(aPresContext, aDesiredSize, aReflowState,
aStatus);
NS_ENSURE_SUCCESS(rv, rv);
offset = nsPoint(aReflowState.mComputedBorderPadding.left,
aReflowState.mComputedBorderPadding.top);
} else {
// HTML <frame>
SizeToAvailSize(aReflowState, aDesiredSize);
}
nsSize innerSize(aDesiredSize.width, aDesiredSize.height);
if (IsInline()) {
innerSize.width -= aReflowState.mComputedBorderPadding.LeftRight();
innerSize.height -= aReflowState.mComputedBorderPadding.TopBottom();
}
if (mInnerView) {
nsIViewManager* vm = mInnerView->GetViewManager();
vm->MoveViewTo(mInnerView, offset.x, offset.y);
vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), innerSize), true);
}
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (!ShouldClipSubdocument()) {
nsIFrame* subdocRootFrame = GetSubdocumentRootFrame();
if (subdocRootFrame) {
aDesiredSize.mOverflowAreas.UnionWith(subdocRootFrame->GetOverflowAreas() + offset);
}
}
FinishAndStoreOverflow(&aDesiredSize);
if (!aPresContext->IsPaginated() && !mPostedReflowCallback) {
PresContext()->PresShell()->PostReflowCallback(this);
mPostedReflowCallback = true;
}
// printf("OuterFrame::Reflow DONE %X (%d,%d)\n", this,
// aDesiredSize.width, aDesiredSize.height);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsSubDocumentFrame::Reflow: size=%d,%d status=%x",
aDesiredSize.width, aDesiredSize.height, aStatus));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
bool
nsSubDocumentFrame::ReflowFinished()
{
if (mFrameLoader) {
nsWeakFrame weakFrame(this);
mFrameLoader->UpdatePositionAndSize(this);
if (weakFrame.IsAlive()) {
// Make sure that we can post a reflow callback in the future.
mPostedReflowCallback = false;
}
} else {
mPostedReflowCallback = false;
}
return false;
}
void
nsSubDocumentFrame::ReflowCallbackCanceled()
{
mPostedReflowCallback = false;
}
NS_IMETHODIMP
nsSubDocumentFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID != kNameSpaceID_None) {
return NS_OK;
}
// If the noResize attribute changes, dis/allow frame to be resized
if (aAttribute == nsGkAtoms::noresize) {
// Note that we're not doing content type checks, but that's ok -- if
// they'd fail we will just end up with a null framesetFrame.
if (mContent->GetParent()->Tag() == nsGkAtoms::frameset) {
nsIFrame* parentFrame = GetParent();
if (parentFrame) {
// There is no interface for nsHTMLFramesetFrame so QI'ing to
// concrete class, yay!
nsHTMLFramesetFrame* framesetFrame = do_QueryFrame(parentFrame);
if (framesetFrame) {
framesetFrame->RecalculateBorderResize();
}
}
}
}
else if (aAttribute == nsGkAtoms::showresizer) {
nsIFrame* rootFrame = GetSubdocumentRootFrame();
if (rootFrame) {
rootFrame->PresContext()->PresShell()->
FrameNeedsReflow(rootFrame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);
}
}
else if (aAttribute == nsGkAtoms::marginwidth ||
aAttribute == nsGkAtoms::marginheight) {
// Retrieve the attributes
nsIntSize margins = GetMarginAttributes();
// Notify the frameloader
nsRefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader)
frameloader->MarginsChanged(margins.width, margins.height);
}
return NS_OK;
}
nsIFrame*
NS_NewSubDocumentFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsSubDocumentFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSubDocumentFrame)
class nsHideViewer : public nsRunnable {
public:
nsHideViewer(nsIContent* aFrameElement,
nsFrameLoader* aFrameLoader,
nsIPresShell* aPresShell,
bool aHideViewerIfFrameless)
: mFrameElement(aFrameElement),
mFrameLoader(aFrameLoader),
mPresShell(aPresShell),
mHideViewerIfFrameless(aHideViewerIfFrameless)
{
NS_ASSERTION(mFrameElement, "Must have a frame element");
NS_ASSERTION(mFrameLoader, "Must have a frame loader");
NS_ASSERTION(mPresShell, "Must have a presshell");
}
NS_IMETHOD Run()
{
// Flush frames, to ensure any pending display:none changes are made.
// Note it can be unsafe to flush if we've destroyed the presentation
// for some other reason, like if we're shutting down.
if (!mPresShell->IsDestroying()) {
mPresShell->FlushPendingNotifications(Flush_Frames);
}
nsIFrame* frame = mFrameElement->GetPrimaryFrame();
if ((!frame && mHideViewerIfFrameless) ||
mPresShell->IsDestroying()) {
// Either the frame element has no nsIFrame or the presshell is being
// destroyed. Hide the nsFrameLoader, which destroys the presentation,
// and clear our references to the stashed presentation.
mFrameLoader->SetDetachedSubdocView(nullptr, nullptr);
mFrameLoader->Hide();
}
return NS_OK;
}
private:
nsCOMPtr<nsIContent> mFrameElement;
nsRefPtr<nsFrameLoader> mFrameLoader;
nsCOMPtr<nsIPresShell> mPresShell;
bool mHideViewerIfFrameless;
};
static nsIView*
BeginSwapDocShellsForViews(nsIView* aSibling);
void
nsSubDocumentFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
if (mPostedReflowCallback) {
PresContext()->PresShell()->CancelReflowCallback(this);
mPostedReflowCallback = false;
}
// Detach the subdocument's views and stash them in the frame loader.
// We can then reattach them if we're being reframed (for example if
// the frame has been made position:fixed).
nsFrameLoader* frameloader = FrameLoader();
if (frameloader) {
nsIView* detachedViews = ::BeginSwapDocShellsForViews(mInnerView->GetFirstChild());
frameloader->SetDetachedSubdocView(detachedViews, mContent->OwnerDoc());
// We call nsFrameLoader::HideViewer() in a script runner so that we can
// safely determine whether the frame is being reframed or destroyed.
nsContentUtils::AddScriptRunner(
new nsHideViewer(mContent,
mFrameLoader,
PresContext()->PresShell(),
(mDidCreateDoc || mCallingShow)));
}
nsLeafFrame::DestroyFrom(aDestructRoot);
}
nsIntSize
nsSubDocumentFrame::GetMarginAttributes()
{
nsIntSize result(-1, -1);
nsGenericHTMLElement *content = nsGenericHTMLElement::FromContent(mContent);
if (content) {
const nsAttrValue* attr = content->GetParsedAttr(nsGkAtoms::marginwidth);
if (attr && attr->Type() == nsAttrValue::eInteger)
result.width = attr->GetIntegerValue();
attr = content->GetParsedAttr(nsGkAtoms::marginheight);
if (attr && attr->Type() == nsAttrValue::eInteger)
result.height = attr->GetIntegerValue();
}
return result;
}
nsFrameLoader*
nsSubDocumentFrame::FrameLoader()
{
nsIContent* content = GetContent();
if (!content)
return nullptr;
if (!mFrameLoader) {
nsCOMPtr<nsIFrameLoaderOwner> loaderOwner = do_QueryInterface(content);
if (loaderOwner) {
nsCOMPtr<nsIFrameLoader> loader;
loaderOwner->GetFrameLoader(getter_AddRefs(loader));
mFrameLoader = static_cast<nsFrameLoader*>(loader.get());
}
}
return mFrameLoader;
}
// XXX this should be called ObtainDocShell or something like that,
// to indicate that it could have side effects
nsresult
nsSubDocumentFrame::GetDocShell(nsIDocShell **aDocShell)
{
*aDocShell = nullptr;
NS_ENSURE_STATE(FrameLoader());
return mFrameLoader->GetDocShell(aDocShell);
}
static void
DestroyDisplayItemDataForFrames(nsIFrame* aFrame)
{
FrameLayerBuilder::DestroyDisplayItemDataFor(aFrame);
nsIFrame::ChildListIterator lists(aFrame);
for (; !lists.IsDone(); lists.Next()) {
nsFrameList::Enumerator childFrames(lists.CurrentList());
for (; !childFrames.AtEnd(); childFrames.Next()) {
DestroyDisplayItemDataForFrames(childFrames.get());
}
}
}
static bool
BeginSwapDocShellsForDocument(nsIDocument* aDocument, void*)
{
NS_PRECONDITION(aDocument, "");
nsIPresShell* shell = aDocument->GetShell();
nsIFrame* rootFrame = shell ? shell->GetRootFrame() : nullptr;
if (rootFrame) {
::DestroyDisplayItemDataForFrames(rootFrame);
}
aDocument->EnumerateFreezableElements(
nsObjectFrame::BeginSwapDocShells, nullptr);
aDocument->EnumerateSubDocuments(BeginSwapDocShellsForDocument, nullptr);
return true;
}
static nsIView*
BeginSwapDocShellsForViews(nsIView* aSibling)
{
// Collect the removed sibling views in reverse order in 'removedViews'.
nsIView* removedViews = nullptr;
while (aSibling) {
nsIDocument* doc = ::GetDocumentFromView(aSibling);
if (doc) {
::BeginSwapDocShellsForDocument(doc, nullptr);
}
nsIView* next = aSibling->GetNextSibling();
aSibling->GetViewManager()->RemoveChild(aSibling);
aSibling->SetNextSibling(removedViews);
removedViews = aSibling;
aSibling = next;
}
return removedViews;
}
static void
InsertViewsInReverseOrder(nsIView* aSibling, nsIView* aParent)
{
NS_PRECONDITION(aParent, "");
NS_PRECONDITION(!aParent->GetFirstChild(), "inserting into non-empty list");
nsIViewManager* vm = aParent->GetViewManager();
while (aSibling) {
nsIView* next = aSibling->GetNextSibling();
aSibling->SetNextSibling(nullptr);
// true means 'after' in document order which is 'before' in view order,
// so this call prepends the child, thus reversing the siblings as we go.
vm->InsertChild(aParent, aSibling, nullptr, true);
aSibling = next;
}
}
nsresult
nsSubDocumentFrame::BeginSwapDocShells(nsIFrame* aOther)
{
if (!aOther || aOther->GetType() != nsGkAtoms::subDocumentFrame) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
if (!mFrameLoader || !mDidCreateDoc || mCallingShow ||
!other->mFrameLoader || !other->mDidCreateDoc) {
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_ASSERTION(HasAnyStateBits(NS_FRAME_IN_POPUP) == other->HasAnyStateBits(NS_FRAME_IN_POPUP),
"Can't swap doc shells when only one is within a popup!");
if (mInnerView && other->mInnerView) {
nsIView* ourSubdocViews = mInnerView->GetFirstChild();
nsIView* ourRemovedViews = ::BeginSwapDocShellsForViews(ourSubdocViews);
nsIView* otherSubdocViews = other->mInnerView->GetFirstChild();
nsIView* otherRemovedViews = ::BeginSwapDocShellsForViews(otherSubdocViews);
::InsertViewsInReverseOrder(ourRemovedViews, other->mInnerView);
::InsertViewsInReverseOrder(otherRemovedViews, mInnerView);
}
mFrameLoader.swap(other->mFrameLoader);
return NS_OK;
}
static bool
EndSwapDocShellsForDocument(nsIDocument* aDocument, void*)
{
NS_PRECONDITION(aDocument, "");
// Our docshell and view trees have been updated for the new hierarchy.
// Now also update all nsDeviceContext::mWidget to that of the
// container view in the new hierarchy.
nsCOMPtr<nsISupports> container = aDocument->GetContainer();
nsCOMPtr<nsIDocShell> ds = do_QueryInterface(container);
if (ds) {
nsCOMPtr<nsIContentViewer> cv;
ds->GetContentViewer(getter_AddRefs(cv));
while (cv) {
nsCOMPtr<nsPresContext> pc;
cv->GetPresContext(getter_AddRefs(pc));
nsDeviceContext* dc = pc ? pc->DeviceContext() : nullptr;
if (dc) {
nsIView* v = cv->FindContainerView();
dc->Init(v ? v->GetNearestWidget(nullptr) : nullptr);
}
nsCOMPtr<nsIContentViewer> prev;
cv->GetPreviousViewer(getter_AddRefs(prev));
cv = prev;
}
}
aDocument->EnumerateFreezableElements(
nsObjectFrame::EndSwapDocShells, nullptr);
aDocument->EnumerateSubDocuments(EndSwapDocShellsForDocument, nullptr);
return true;
}
static void
EndSwapDocShellsForViews(nsIView* aSibling)
{
for ( ; aSibling; aSibling = aSibling->GetNextSibling()) {
nsIDocument* doc = ::GetDocumentFromView(aSibling);
if (doc) {
::EndSwapDocShellsForDocument(doc, nullptr);
}
nsIFrame *frame = aSibling->GetFrame();
if (frame && frame->HasInvalidFrameInSubtree()) {
nsIFrame *parent = nsLayoutUtils::GetCrossDocParentFrame(frame);
while (parent && !parent->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT)) {
parent->AddStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT);
parent = nsLayoutUtils::GetCrossDocParentFrame(parent);
}
}
}
}
void
nsSubDocumentFrame::EndSwapDocShells(nsIFrame* aOther)
{
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
nsWeakFrame weakThis(this);
nsWeakFrame weakOther(aOther);
if (mInnerView) {
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
}
if (other->mInnerView) {
::EndSwapDocShellsForViews(other->mInnerView->GetFirstChild());
}
// Now make sure we reflow both frames, in case their contents
// determine their size.
// And repaint them, for good measure, in case there's nothing
// interesting that happens during reflow.
if (weakThis.IsAlive()) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
InvalidateFrameSubtree();
}
if (weakOther.IsAlive()) {
other->PresContext()->PresShell()->
FrameNeedsReflow(other, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
other->InvalidateFrameSubtree();
}
}
nsIView*
nsSubDocumentFrame::EnsureInnerView()
{
if (mInnerView) {
return mInnerView;
}
// create, init, set the parent of the view
nsIView* outerView = GetView();
NS_ASSERTION(outerView, "Must have an outer view already");
nsRect viewBounds(0, 0, 0, 0); // size will be fixed during reflow
nsIViewManager* viewMan = outerView->GetViewManager();
nsIView* innerView = viewMan->CreateView(viewBounds, outerView);
if (!innerView) {
NS_ERROR("Could not create inner view");
return nullptr;
}
mInnerView = innerView;
viewMan->InsertChild(outerView, innerView, nullptr, true);
return mInnerView;
}
nsIFrame*
nsSubDocumentFrame::ObtainIntrinsicSizeFrame()
{
nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(GetContent());
if (olc) {
// We are an HTML <object>, <embed> or <applet> (a replaced element).
// Try to get an nsIFrame for our sub-document's document element
nsIFrame* subDocRoot = nullptr;
nsCOMPtr<nsIDocShell> docShell;
GetDocShell(getter_AddRefs(docShell));
if (docShell) {
nsCOMPtr<nsIPresShell> presShell;
docShell->GetPresShell(getter_AddRefs(presShell));
if (presShell) {
nsIScrollableFrame* scrollable = presShell->GetRootScrollFrameAsScrollable();
if (scrollable) {
nsIFrame* scrolled = scrollable->GetScrolledFrame();
if (scrolled) {
subDocRoot = scrolled->GetFirstPrincipalChild();
}
}
}
}
if (subDocRoot && subDocRoot->GetContent() &&
subDocRoot->GetContent()->NodeInfo()->Equals(nsGkAtoms::svg, kNameSpaceID_SVG)) {
return subDocRoot; // SVG documents have an intrinsic size
}
}
return nullptr;
}
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