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nsFrame.cpp
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nsFrame.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=2:et:sw=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/. */
/* base class of all rendering objects */
#include "mozilla/Attributes.h"
#include "mozilla/DebugOnly.h"
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsFrameList.h"
#include "nsPlaceholderFrame.h"
#include "nsLineLayout.h"
#include "nsIContent.h"
#include "nsContentUtils.h"
#include "nsIAtom.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsStyleContext.h"
#include "nsTableOuterFrame.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIScrollableFrame.h"
#include "nsPresContext.h"
#include "nsCRT.h"
#include "nsGUIEvent.h"
#include "nsIDOMEvent.h"
#include "nsAsyncDOMEvent.h"
#include "nsStyleConsts.h"
#include "nsIPresShell.h"
#include "prlog.h"
#include "prprf.h"
#include <stdarg.h>
#include "nsFrameManager.h"
#include "nsCSSRendering.h"
#include "nsLayoutUtils.h"
#include "nsIDOMNode.h"
#include "nsIEditorDocShell.h"
#include "nsEventStateManager.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsFrameSelection.h"
#include "nsHTMLParts.h"
#include "nsGkAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSFrameConstructor.h"
#include "nsFrameTraversal.h"
#include "nsStyleChangeList.h"
#include "nsIDOMRange.h"
#include "nsRange.h"
#include "nsITableCellLayout.h"// "
#include "nsITextControlFrame.h"
#include "nsINameSpaceManager.h"
#include "nsIPercentHeightObserver.h"
#include "nsStyleStructInlines.h"
#ifdef IBMBIDI
#include "nsBidiPresUtils.h"
#endif
// For triple-click pref
#include "nsIServiceManager.h"
#include "imgIContainer.h"
#include "imgIRequest.h"
#include "nsLayoutCID.h"
#include "nsUnicharUtils.h"
#include "nsError.h"
#include "nsContainerFrame.h"
#include "nsBoxLayoutState.h"
#include "nsBlockFrame.h"
#include "nsDisplayList.h"
#include "nsIObjectLoadingContent.h"
#include "nsExpirationTracker.h"
#include "nsSVGIntegrationUtils.h"
#include "nsSVGEffects.h"
#include "nsChangeHint.h"
#include "nsDeckFrame.h"
#include "nsTableFrame.h"
#include "nsSubDocumentFrame.h"
#include "gfxContext.h"
#include "nsRenderingContext.h"
#include "CSSCalc.h"
#include "nsAbsoluteContainingBlock.h"
#include "nsFontInflationData.h"
#include "nsAnimationManager.h"
#include "nsTransitionManager.h"
#include "mozilla/Preferences.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/css/ImageLoader.h"
#include "mozilla/gfx/Tools.h"
using namespace mozilla;
using namespace mozilla::layers;
using namespace mozilla::layout;
using namespace mozilla::css;
// Struct containing cached metrics for box-wrapped frames.
struct nsBoxLayoutMetrics
{
nsSize mPrefSize;
nsSize mMinSize;
nsSize mMaxSize;
nsSize mBlockMinSize;
nsSize mBlockPrefSize;
nscoord mBlockAscent;
nscoord mFlex;
nscoord mAscent;
nsSize mLastSize;
};
struct nsContentAndOffset
{
nsIContent* mContent;
int32_t mOffset;
};
// Some Misc #defines
#define SELECTION_DEBUG 0
#define FORCE_SELECTION_UPDATE 1
#define CALC_DEBUG 0
#include "nsILineIterator.h"
//non Hack prototypes
#if 0
static void RefreshContentFrames(nsPresContext* aPresContext, nsIContent * aStartContent, nsIContent * aEndContent);
#endif
#include "prenv.h"
// Formerly the nsIFrameDebug interface
#ifdef DEBUG
static bool gShowFrameBorders = false;
void nsFrame::ShowFrameBorders(bool aEnable)
{
gShowFrameBorders = aEnable;
}
bool nsFrame::GetShowFrameBorders()
{
return gShowFrameBorders;
}
static bool gShowEventTargetFrameBorder = false;
void nsFrame::ShowEventTargetFrameBorder(bool aEnable)
{
gShowEventTargetFrameBorder = aEnable;
}
bool nsFrame::GetShowEventTargetFrameBorder()
{
return gShowEventTargetFrameBorder;
}
/**
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule;
static PRLogModuleInfo* gStyleVerifyTreeLogModuleInfo;
static uint32_t gStyleVerifyTreeEnable = 0x55;
bool
nsFrame::GetVerifyStyleTreeEnable()
{
if (gStyleVerifyTreeEnable == 0x55) {
if (nullptr == gStyleVerifyTreeLogModuleInfo) {
gStyleVerifyTreeLogModuleInfo = PR_NewLogModule("styleverifytree");
gStyleVerifyTreeEnable = 0 != gStyleVerifyTreeLogModuleInfo->level;
}
}
return gStyleVerifyTreeEnable;
}
void
nsFrame::SetVerifyStyleTreeEnable(bool aEnabled)
{
gStyleVerifyTreeEnable = aEnabled;
}
PRLogModuleInfo*
nsFrame::GetLogModuleInfo()
{
if (nullptr == gLogModule) {
gLogModule = PR_NewLogModule("frame");
}
return gLogModule;
}
void
nsFrame::DumpFrameTree(nsIFrame* aFrame)
{
RootFrameList(aFrame->PresContext(), stdout, 0);
}
void
nsFrame::RootFrameList(nsPresContext* aPresContext, FILE* out, int32_t aIndent)
{
if (!aPresContext || !out)
return;
nsIPresShell *shell = aPresContext->GetPresShell();
if (shell) {
nsIFrame* frame = shell->FrameManager()->GetRootFrame();
if(frame) {
frame->List(out, aIndent);
}
}
}
#endif
static void
DestroyAbsoluteContainingBlock(void* aPropertyValue)
{
delete static_cast<nsAbsoluteContainingBlock*>(aPropertyValue);
}
NS_DECLARE_FRAME_PROPERTY(AbsoluteContainingBlockProperty, DestroyAbsoluteContainingBlock)
bool
nsIFrame::HasAbsolutelyPositionedChildren() const {
return IsAbsoluteContainer() && GetAbsoluteContainingBlock()->HasAbsoluteFrames();
}
nsAbsoluteContainingBlock*
nsIFrame::GetAbsoluteContainingBlock() const {
NS_ASSERTION(IsAbsoluteContainer(), "The frame is not marked as an abspos container correctly");
nsAbsoluteContainingBlock* absCB = static_cast<nsAbsoluteContainingBlock*>
(Properties().Get(AbsoluteContainingBlockProperty()));
NS_ASSERTION(absCB, "The frame is marked as an abspos container but doesn't have the property");
return absCB;
}
void
nsIFrame::MarkAsAbsoluteContainingBlock()
{
MOZ_ASSERT(GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);
NS_ASSERTION(!Properties().Get(AbsoluteContainingBlockProperty()),
"Already has an abs-pos containing block property?");
NS_ASSERTION(!HasAnyStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN),
"Already has NS_FRAME_HAS_ABSPOS_CHILDREN state bit?");
AddStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN);
Properties().Set(AbsoluteContainingBlockProperty(), new nsAbsoluteContainingBlock(GetAbsoluteListID()));
}
void
nsIFrame::MarkAsNotAbsoluteContainingBlock()
{
NS_ASSERTION(!HasAbsolutelyPositionedChildren(), "Think of the children!");
NS_ASSERTION(Properties().Get(AbsoluteContainingBlockProperty()),
"Should have an abs-pos containing block property");
NS_ASSERTION(HasAnyStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN),
"Should have NS_FRAME_HAS_ABSPOS_CHILDREN state bit");
MOZ_ASSERT(HasAnyStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN));
RemoveStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN);
Properties().Delete(AbsoluteContainingBlockProperty());
}
bool
nsIFrame::CheckAndClearPaintedState()
{
bool result = (GetStateBits() & NS_FRAME_PAINTED_THEBES);
RemoveStateBits(NS_FRAME_PAINTED_THEBES);
nsIFrame::ChildListIterator lists(this);
for (; !lists.IsDone(); lists.Next()) {
nsFrameList::Enumerator childFrames(lists.CurrentList());
for (; !childFrames.AtEnd(); childFrames.Next()) {
nsIFrame* child = childFrames.get();
if (child->CheckAndClearPaintedState()) {
result = true;
}
}
}
return result;
}
bool
nsIFrame::IsVisibleConsideringAncestors(uint32_t aFlags) const
{
if (!GetStyleVisibility()->IsVisible()) {
return false;
}
const nsIFrame* frame = this;
while (frame) {
nsView* view = frame->GetView();
if (view && view->GetVisibility() == nsViewVisibility_kHide)
return false;
nsIFrame* parent = frame->GetParent();
nsDeckFrame* deck = do_QueryFrame(parent);
if (deck) {
if (deck->GetSelectedBox() != frame)
return false;
}
if (parent) {
frame = parent;
} else {
parent = nsLayoutUtils::GetCrossDocParentFrame(frame);
if (!parent)
break;
if ((aFlags & nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY) == 0 &&
parent->PresContext()->IsChrome() && !frame->PresContext()->IsChrome()) {
break;
}
if (!parent->GetStyleVisibility()->IsVisible())
return false;
frame = parent;
}
}
return true;
}
static bool ApplyOverflowClipping(nsDisplayListBuilder* aBuilder,
const nsIFrame* aFrame,
const nsStyleDisplay* aDisp,
nsRect* aRect);
static bool ApplyClipPropClipping(nsDisplayListBuilder* aBuilder,
const nsStyleDisplay* aDisp,
const nsIFrame* aFrame,
nsRect* aRect);
void
NS_MergeReflowStatusInto(nsReflowStatus* aPrimary, nsReflowStatus aSecondary)
{
*aPrimary |= aSecondary &
(NS_FRAME_NOT_COMPLETE | NS_FRAME_OVERFLOW_INCOMPLETE |
NS_FRAME_TRUNCATED | NS_FRAME_REFLOW_NEXTINFLOW);
if (*aPrimary & NS_FRAME_NOT_COMPLETE) {
*aPrimary &= ~NS_FRAME_OVERFLOW_INCOMPLETE;
}
}
void
nsWeakFrame::InitInternal(nsIFrame* aFrame)
{
Clear(mFrame ? mFrame->PresContext()->GetPresShell() : nullptr);
mFrame = aFrame;
if (mFrame) {
nsIPresShell* shell = mFrame->PresContext()->GetPresShell();
NS_WARN_IF_FALSE(shell, "Null PresShell in nsWeakFrame!");
if (shell) {
shell->AddWeakFrame(this);
} else {
mFrame = nullptr;
}
}
}
nsIFrame*
NS_NewEmptyFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsFrame(aContext);
}
nsFrame::nsFrame(nsStyleContext* aContext)
{
MOZ_COUNT_CTOR(nsFrame);
mState = NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY;
mStyleContext = aContext;
mStyleContext->AddRef();
}
nsFrame::~nsFrame()
{
MOZ_COUNT_DTOR(nsFrame);
NS_IF_RELEASE(mContent);
if (mStyleContext)
mStyleContext->Release();
}
NS_IMPL_FRAMEARENA_HELPERS(nsFrame)
// Dummy operator delete. Will never be called, but must be defined
// to satisfy some C++ ABIs.
void
nsFrame::operator delete(void *, size_t)
{
NS_RUNTIMEABORT("nsFrame::operator delete should never be called");
}
NS_QUERYFRAME_HEAD(nsFrame)
NS_QUERYFRAME_ENTRY(nsIFrame)
NS_QUERYFRAME_TAIL_INHERITANCE_ROOT
/////////////////////////////////////////////////////////////////////////////
// nsIFrame
static bool
IsFontSizeInflationContainer(nsIFrame* aFrame,
const nsStyleDisplay* aStyleDisplay)
{
/*
* Font size inflation is built around the idea that we're inflating
* the fonts for a pan-and-zoom UI so that when the user scales up a
* block or other container to fill the width of the device, the fonts
* will be readable. To do this, we need to pick what counts as a
* container.
*
* From a code perspective, the only hard requirement is that frames
* that are line participants
* (nsIFrame::IsFrameOfType(nsIFrame::eLineParticipant)) are never
* containers, since line layout assumes that the inflation is
* consistent within a line.
*
* This is not an imposition, since we obviously want a bunch of text
* (possibly with inline elements) flowing within a block to count the
* block (or higher) as its container.
*
* We also want form controls, including the text in the anonymous
* content inside of them, to match each other and the text next to
* them, so they and their anonymous content should also not be a
* container.
*
* However, because we can't reliably compute sizes across XUL during
* reflow, any XUL frame with a XUL parent is always a container.
*
* There are contexts where it would be nice if some blocks didn't
* count as a container, so that, for example, an indented quotation
* didn't end up with a smaller font size. However, it's hard to
* distinguish these situations where we really do want the indented
* thing to count as a container, so we don't try, and blocks are
* always containers.
*/
// The root frame should always be an inflation container.
if (!aFrame->GetParent()) {
return true;
}
nsIContent *content = aFrame->GetContent();
bool isInline = (aFrame->GetDisplay() == NS_STYLE_DISPLAY_INLINE ||
(aFrame->IsFloating() &&
aFrame->GetType() == nsGkAtoms::letterFrame) ||
// Given multiple frames for the same node, only the
// outer one should be considered a container.
// (Important, e.g., for nsSelectsAreaFrame.)
(aFrame->GetParent()->GetContent() == content) ||
(content && (content->IsHTML(nsGkAtoms::option) ||
content->IsHTML(nsGkAtoms::optgroup) ||
content->IsHTML(nsGkAtoms::select) ||
content->IsInNativeAnonymousSubtree()))) &&
!(aFrame->IsBoxFrame() && aFrame->GetParent()->IsBoxFrame());
NS_ASSERTION(!aFrame->IsFrameOfType(nsIFrame::eLineParticipant) ||
isInline ||
// br frames and mathml frames report being line
// participants even when their position or display is
// set
aFrame->GetType() == nsGkAtoms::brFrame ||
aFrame->IsFrameOfType(nsIFrame::eMathML),
"line participants must not be containers");
NS_ASSERTION(aFrame->GetType() != nsGkAtoms::bulletFrame || isInline,
"bullets should not be containers");
return !isInline;
}
NS_IMETHODIMP
nsFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_PRECONDITION(!mContent, "Double-initing a frame?");
NS_ASSERTION(IsFrameOfType(eDEBUGAllFrames) &&
!IsFrameOfType(eDEBUGNoFrames),
"IsFrameOfType implementation that doesn't call base class");
mContent = aContent;
mParent = aParent;
if (aContent) {
NS_ADDREF(aContent);
}
if (aPrevInFlow) {
// Make sure the general flags bits are the same
nsFrameState state = aPrevInFlow->GetStateBits();
// Make bits that are currently off (see constructor) the same:
mState |= state & (NS_FRAME_INDEPENDENT_SELECTION |
NS_FRAME_IS_SPECIAL |
NS_FRAME_MAY_BE_TRANSFORMED |
NS_FRAME_MAY_HAVE_GENERATED_CONTENT |
NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);
}
if (mParent) {
nsFrameState state = mParent->GetStateBits();
// Make bits that are currently off (see constructor) the same:
mState |= state & (NS_FRAME_INDEPENDENT_SELECTION |
NS_FRAME_GENERATED_CONTENT |
NS_FRAME_IS_SVG_TEXT |
NS_FRAME_IN_POPUP);
}
const nsStyleDisplay *disp = GetStyleDisplay();
if (disp->HasTransform(this)) {
// The frame gets reconstructed if we toggle the -moz-transform
// property, so we can set this bit here and then ignore it.
mState |= NS_FRAME_MAY_BE_TRANSFORMED;
}
if (nsLayoutUtils::FontSizeInflationEnabled(PresContext()) || !GetParent()
#ifdef DEBUG
// We have assertions that check inflation invariants even when
// font size inflation is not enabled.
|| true
#endif
) {
if (IsFontSizeInflationContainer(this, disp)) {
AddStateBits(NS_FRAME_FONT_INFLATION_CONTAINER);
if (!GetParent() ||
// I'd use NS_FRAME_OUT_OF_FLOW, but it's not set yet.
disp->IsFloating(this) || disp->IsAbsolutelyPositioned(this)) {
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
}
NS_ASSERTION(GetParent() ||
(GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER),
"root frame should always be a container");
}
DidSetStyleContext(nullptr);
if (IsBoxWrapped())
InitBoxMetrics(false);
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList)
{
// XXX This shouldn't be getting called at all, but currently is for backwards
// compatility reasons...
#if 0
NS_ERROR("not a container");
return NS_ERROR_UNEXPECTED;
#else
NS_ASSERTION(aChildList.IsEmpty(), "not a container");
return NS_OK;
#endif
}
NS_IMETHODIMP
nsFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
NS_PRECONDITION(false, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
NS_PRECONDITION(false, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
NS_PRECONDITION(false, "not a container");
return NS_ERROR_UNEXPECTED;
}
void
nsFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"destroy called on frame while scripts not blocked");
NS_ASSERTION(!GetNextSibling() && !GetPrevSibling(),
"Frames should be removed before destruction.");
NS_ASSERTION(aDestructRoot, "Must specify destruct root");
MOZ_ASSERT(!HasAbsolutelyPositionedChildren());
nsSVGEffects::InvalidateDirectRenderingObservers(this);
// Get the view pointer now before the frame properties disappear
// when we call NotifyDestroyingFrame()
nsView* view = GetView();
nsPresContext* presContext = PresContext();
nsIPresShell *shell = presContext->GetPresShell();
if (mState & NS_FRAME_OUT_OF_FLOW) {
nsPlaceholderFrame* placeholder =
shell->FrameManager()->GetPlaceholderFrameFor(this);
NS_ASSERTION(!placeholder || (aDestructRoot != this),
"Don't call Destroy() on OOFs, call Destroy() on the placeholder.");
NS_ASSERTION(!placeholder ||
nsLayoutUtils::IsProperAncestorFrame(aDestructRoot, placeholder),
"Placeholder relationship should have been torn down already; "
"this might mean we have a stray placeholder in the tree.");
if (placeholder) {
shell->FrameManager()->UnregisterPlaceholderFrame(placeholder);
placeholder->SetOutOfFlowFrame(nullptr);
}
}
// If we have any IB split special siblings, clear their references to us.
// (Note: This has to happen before we call shell->NotifyDestroyingFrame,
// because that clears our Properties() table.)
if (mState & NS_FRAME_IS_SPECIAL) {
// Delete previous sibling's reference to me.
nsIFrame* prevSib = static_cast<nsIFrame*>
(Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
if (prevSib) {
NS_WARN_IF_FALSE(this ==
prevSib->Properties().Get(nsIFrame::IBSplitSpecialSibling()),
"IB sibling chain is inconsistent");
prevSib->Properties().Delete(nsIFrame::IBSplitSpecialSibling());
}
// Delete next sibling's reference to me.
nsIFrame* nextSib = static_cast<nsIFrame*>
(Properties().Get(nsIFrame::IBSplitSpecialSibling()));
if (nextSib) {
NS_WARN_IF_FALSE(this ==
nextSib->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()),
"IB sibling chain is inconsistent");
nextSib->Properties().Delete(nsIFrame::IBSplitSpecialPrevSibling());
}
}
shell->NotifyDestroyingFrame(this);
if (mState & NS_FRAME_EXTERNAL_REFERENCE) {
shell->ClearFrameRefs(this);
}
if (view) {
// Break association between view and frame
view->SetFrame(nullptr);
// Destroy the view
view->Destroy();
}
// Make sure that our deleted frame can't be returned from GetPrimaryFrame()
if (mContent && mContent->GetPrimaryFrame() == this) {
mContent->SetPrimaryFrame(nullptr);
}
// Must retrieve the object ID before calling destructors, so the
// vtable is still valid.
//
// Note to future tweakers: having the method that returns the
// object size call the destructor will not avoid an indirect call;
// the compiler cannot devirtualize the call to the destructor even
// if it's from a method defined in the same class.
nsQueryFrame::FrameIID id = GetFrameId();
this->~nsFrame();
// Now that we're totally cleaned out, we need to add ourselves to
// the presshell's recycler.
shell->FreeFrame(id, this);
}
NS_IMETHODIMP
nsFrame::GetOffsets(int32_t &aStart, int32_t &aEnd) const
{
aStart = 0;
aEnd = 0;
return NS_OK;
}
static bool
EqualImages(imgIRequest *aOldImage, imgIRequest *aNewImage)
{
if (aOldImage == aNewImage)
return true;
if (!aOldImage || !aNewImage)
return false;
nsCOMPtr<nsIURI> oldURI, newURI;
aOldImage->GetURI(getter_AddRefs(oldURI));
aNewImage->GetURI(getter_AddRefs(newURI));
bool equal;
return NS_SUCCEEDED(oldURI->Equals(newURI, &equal)) && equal;
}
// Subclass hook for style post processing
/* virtual */ void
nsFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
ImageLoader* imageLoader = PresContext()->Document()->StyleImageLoader();
// If the old context had a background image image and new context
// does not have the same image, clear the image load notifier
// (which keeps the image loading, if it still is) for the frame.
// We want to do this conservatively because some frames paint their
// backgrounds from some other frame's style data, and we don't want
// to clear those notifiers unless we have to. (They'll be reset
// when we paint, although we could miss a notification in that
// interval.)
const nsStyleBackground *oldBG = aOldStyleContext ?
aOldStyleContext->GetStyleBackground() :
nullptr;
const nsStyleBackground *newBG = GetStyleBackground();
if (oldBG) {
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, oldBG) {
// If there is an image in oldBG that's not in newBG, drop it.
if (i >= newBG->mImageCount ||
oldBG->mLayers[i].mImage != newBG->mLayers[i].mImage) {
const nsStyleImage& oldImage = oldBG->mLayers[i].mImage;
if (oldImage.GetType() != eStyleImageType_Image) {
continue;
}
imageLoader->DisassociateRequestFromFrame(oldImage.GetImageData(),
this);
}
}
}
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, newBG) {
// If there is an image in newBG that's not in oldBG, add it.
if (!oldBG || i >= oldBG->mImageCount ||
newBG->mLayers[i].mImage != oldBG->mLayers[i].mImage) {
const nsStyleImage& newImage = newBG->mLayers[i].mImage;
if (newImage.GetType() != eStyleImageType_Image) {
continue;
}
imageLoader->AssociateRequestToFrame(newImage.GetImageData(), this);
}
}
if (aOldStyleContext) {
// If we detect a change on margin, padding or border, we store the old
// values on the frame itself between now and reflow, so if someone
// calls GetUsed(Margin|Border|Padding)() before the next reflow, we
// can give an accurate answer.
// We don't want to set the property if one already exists.
FrameProperties props = Properties();
nsMargin oldValue(0, 0, 0, 0);
nsMargin newValue(0, 0, 0, 0);
const nsStyleMargin* oldMargin = aOldStyleContext->PeekStyleMargin();
if (oldMargin && oldMargin->GetMargin(oldValue)) {
if ((!GetStyleMargin()->GetMargin(newValue) || oldValue != newValue) &&
!props.Get(UsedMarginProperty())) {
props.Set(UsedMarginProperty(), new nsMargin(oldValue));
}
}
const nsStylePadding* oldPadding = aOldStyleContext->PeekStylePadding();
if (oldPadding && oldPadding->GetPadding(oldValue)) {
if ((!GetStylePadding()->GetPadding(newValue) || oldValue != newValue) &&
!props.Get(UsedPaddingProperty())) {
props.Set(UsedPaddingProperty(), new nsMargin(oldValue));
}
}
const nsStyleBorder* oldBorder = aOldStyleContext->PeekStyleBorder();
if (oldBorder) {
oldValue = oldBorder->GetComputedBorder();
newValue = GetStyleBorder()->GetComputedBorder();
if (oldValue != newValue &&
!props.Get(UsedBorderProperty())) {
props.Set(UsedBorderProperty(), new nsMargin(oldValue));
}
}
}
imgIRequest *oldBorderImage = aOldStyleContext
? aOldStyleContext->GetStyleBorder()->GetBorderImage()
: nullptr;
imgIRequest *newBorderImage = GetStyleBorder()->GetBorderImage();
// FIXME (Bug 759996): The following is no longer true.
// For border-images, we can't be as conservative (we need to set the
// new loaders if there has been any change) since the CalcDifference
// call depended on the result of GetComputedBorder() and that result
// depends on whether the image has loaded, start the image load now
// so that we'll get notified when it completes loading and can do a
// restyle. Otherwise, the image might finish loading from the
// network before we start listening to its notifications, and then
// we'll never know that it's finished loading. Likewise, we want to
// do this for freshly-created frames to prevent a similar race if the
// image loads between reflow (which can depend on whether the image
// is loaded) and paint. We also don't really care about any callers
// who try to paint borders with a different style context, because
// they won't have the correct size for the border either.
if (!EqualImages(oldBorderImage, newBorderImage)) {
// stop and restart the image loading/notification
if (oldBorderImage) {
imageLoader->DisassociateRequestFromFrame(oldBorderImage, this);
}
if (newBorderImage) {
imageLoader->AssociateRequestToFrame(newBorderImage, this);
}
}
// If the page contains markup that overrides text direction, and
// does not contain any characters that would activate the Unicode
// bidi algorithm, we need to call |SetBidiEnabled| on the pres
// context before reflow starts. See bug 115921.
if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
PresContext()->SetBidiEnabled();
}
}
// MSVC fails with link error "one or more multiply defined symbols found",
// gcc fails with "hidden symbol `nsIFrame::kPrincipalList' isn't defined"
// etc if they are not defined.
#ifndef _MSC_VER
// static nsIFrame constants; initialized in the header file.
const nsIFrame::ChildListID nsIFrame::kPrincipalList;
const nsIFrame::ChildListID nsIFrame::kAbsoluteList;
const nsIFrame::ChildListID nsIFrame::kBulletList;
const nsIFrame::ChildListID nsIFrame::kCaptionList;
const nsIFrame::ChildListID nsIFrame::kColGroupList;
const nsIFrame::ChildListID nsIFrame::kExcessOverflowContainersList;
const nsIFrame::ChildListID nsIFrame::kFixedList;
const nsIFrame::ChildListID nsIFrame::kFloatList;
const nsIFrame::ChildListID nsIFrame::kOverflowContainersList;
const nsIFrame::ChildListID nsIFrame::kOverflowList;
const nsIFrame::ChildListID nsIFrame::kOverflowOutOfFlowList;
const nsIFrame::ChildListID nsIFrame::kPopupList;
const nsIFrame::ChildListID nsIFrame::kPushedFloatsList;
const nsIFrame::ChildListID nsIFrame::kSelectPopupList;
const nsIFrame::ChildListID nsIFrame::kNoReflowPrincipalList;
#endif
/* virtual */ nsMargin
nsIFrame::GetUsedMargin() const
{
nsMargin margin(0, 0, 0, 0);
if (((mState & NS_FRAME_FIRST_REFLOW) &&
!(mState & NS_FRAME_IN_REFLOW)) ||
(mState & NS_FRAME_IS_SVG_TEXT))
return margin;
nsMargin *m = static_cast<nsMargin*>
(Properties().Get(UsedMarginProperty()));
if (m) {
margin = *m;
} else {
#ifdef DEBUG
bool hasMargin =
#endif
GetStyleMargin()->GetMargin(margin);
NS_ASSERTION(hasMargin, "We should have a margin here! (out of memory?)");
}
return margin;
}
/* virtual */ nsMargin
nsIFrame::GetUsedBorder() const
{
nsMargin border(0, 0, 0, 0);
if (((mState & NS_FRAME_FIRST_REFLOW) &&
!(mState & NS_FRAME_IN_REFLOW)) ||
(mState & NS_FRAME_IS_SVG_TEXT))
return border;
// Theme methods don't use const-ness.
nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
const nsStyleDisplay *disp = GetStyleDisplay();
if (mutable_this->IsThemed(disp)) {
nsIntMargin result;
nsPresContext *presContext = PresContext();
presContext->GetTheme()->GetWidgetBorder(presContext->DeviceContext(),
mutable_this, disp->mAppearance,
&result);
border.left = presContext->DevPixelsToAppUnits(result.left);
border.top = presContext->DevPixelsToAppUnits(result.top);
border.right = presContext->DevPixelsToAppUnits(result.right);
border.bottom = presContext->DevPixelsToAppUnits(result.bottom);
return border;
}
nsMargin *b = static_cast<nsMargin*>
(Properties().Get(UsedBorderProperty()));
if (b) {
border = *b;
} else {
border = GetStyleBorder()->GetComputedBorder();
}
return border;
}
/* virtual */ nsMargin
nsIFrame::GetUsedPadding() const
{
nsMargin padding(0, 0, 0, 0);
if (((mState & NS_FRAME_FIRST_REFLOW) &&
!(mState & NS_FRAME_IN_REFLOW)) ||
(mState & NS_FRAME_IS_SVG_TEXT))
return padding;
// Theme methods don't use const-ness.
nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
const nsStyleDisplay *disp = GetStyleDisplay();
if (mutable_this->IsThemed(disp)) {
nsPresContext *presContext = PresContext();
nsIntMargin widget;
if (presContext->GetTheme()->GetWidgetPadding(presContext->DeviceContext(),
mutable_this,
disp->mAppearance,
&widget)) {
padding.top = presContext->DevPixelsToAppUnits(widget.top);
padding.right = presContext->DevPixelsToAppUnits(widget.right);
padding.bottom = presContext->DevPixelsToAppUnits(widget.bottom);
padding.left = presContext->DevPixelsToAppUnits(widget.left);
return padding;
}
}
nsMargin *p = static_cast<nsMargin*>
(Properties().Get(UsedPaddingProperty()));
if (p) {
padding = *p;
} else {
#ifdef DEBUG
bool hasPadding =
#endif
GetStylePadding()->GetPadding(padding);
NS_ASSERTION(hasPadding, "We should have padding here! (out of memory?)");
}
return padding;
}
void
nsIFrame::ApplySkipSides(nsMargin& aMargin) const
{
int skipSides = GetSkipSides();
if (skipSides & (1 << NS_SIDE_TOP))
aMargin.top = 0;
if (skipSides & (1 << NS_SIDE_RIGHT))
aMargin.right = 0;
if (skipSides & (1 << NS_SIDE_BOTTOM))
aMargin.bottom = 0;
if (skipSides & (1 << NS_SIDE_LEFT))
aMargin.left = 0;
}
nsRect
nsIFrame::GetPaddingRectRelativeToSelf() const
{
nsMargin bp(GetUsedBorder());
ApplySkipSides(bp);
nsRect r(0, 0, mRect.width, mRect.height);
r.Deflate(bp);
return r;
}
nsRect
nsIFrame::GetPaddingRect() const
{
return GetPaddingRectRelativeToSelf() + GetPosition();
}
bool
nsIFrame::IsTransformed() const
{
return ((mState & NS_FRAME_MAY_BE_TRANSFORMED) &&
(GetStyleDisplay()->HasTransform(this) ||
IsSVGTransformed() ||
(mContent &&
nsLayoutUtils::HasAnimationsForCompositor(mContent,
eCSSProperty_transform) &&
IsFrameOfType(eSupportsCSSTransforms) &&
mContent->GetPrimaryFrame() == this)));
}
bool
nsIFrame::HasOpacity() const
{
return GetStyleDisplay()->mOpacity < 1.0f || (mContent &&