mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/layout/generic/nsCanvasFrame.cpp

849 строки
32 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 that goes directly inside the document's scrollbars */
#include "nsCanvasFrame.h"
#include "gfxContext.h"
#include "gfxUtils.h"
#include "nsContainerFrame.h"
#include "nsContentCreatorFunctions.h"
#include "nsCSSRendering.h"
#include "nsPresContext.h"
#include "nsPopupSetFrame.h"
#include "nsGkAtoms.h"
#include "nsIFrameInlines.h"
#include "nsDisplayList.h"
#include "nsCSSFrameConstructor.h"
#include "nsFrameManager.h"
#include "gfxPlatform.h"
#include "nsPrintfCString.h"
#include "mozilla/AccessibleCaretEventHub.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/dom/AnonymousContent.h"
#include "mozilla/layers/StackingContextHelper.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "mozilla/PresShell.h"
// for focus
#include "nsIScrollableFrame.h"
#ifdef DEBUG_CANVAS_FOCUS
# include "nsIDocShell.h"
#endif
//#define DEBUG_CANVAS_FOCUS
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::layout;
using namespace mozilla::gfx;
using namespace mozilla::layers;
nsCanvasFrame* NS_NewCanvasFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell) nsCanvasFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsCanvasFrame)
NS_QUERYFRAME_HEAD(nsCanvasFrame)
NS_QUERYFRAME_ENTRY(nsCanvasFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsIPopupContainer)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
void nsCanvasFrame::ShowCustomContentContainer() {
if (mCustomContentContainer) {
mCustomContentContainer->UnsetAttr(kNameSpaceID_None, nsGkAtoms::hidden,
true);
}
}
void nsCanvasFrame::HideCustomContentContainer() {
if (mCustomContentContainer) {
mCustomContentContainer->SetAttr(kNameSpaceID_None, nsGkAtoms::hidden,
NS_LITERAL_STRING("true"), true);
}
}
nsresult nsCanvasFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
MOZ_ASSERT(!mCustomContentContainer);
if (!mContent) {
return NS_OK;
}
nsCOMPtr<Document> doc = mContent->OwnerDoc();
RefPtr<AccessibleCaretEventHub> eventHub =
PresShell()->GetAccessibleCaretEventHub();
// This will go through InsertAnonymousContent and such, and we don't really
// want it to end up inserting into our content container.
//
// FIXME(emilio): The fact that this enters into InsertAnonymousContent is a
// bit nasty, can we avoid it, maybe doing this off a scriptrunner?
if (eventHub) {
eventHub->Init();
}
// Create the custom content container.
mCustomContentContainer = doc->CreateHTMLElement(nsGkAtoms::div);
#ifdef DEBUG
// We restyle our mCustomContentContainer, even though it's root anonymous
// content. Normally that's not OK because the frame constructor doesn't know
// how to order the frame tree in such cases, but we make this work for this
// particular case, so it's OK.
mCustomContentContainer->SetProperty(nsGkAtoms::restylableAnonymousNode,
reinterpret_cast<void*>(true));
#endif // DEBUG
mCustomContentContainer->SetProperty(
nsGkAtoms::docLevelNativeAnonymousContent, reinterpret_cast<void*>(true));
// This will usually be done by the caller, but in this case we do it here,
// since we reuse the document's AnoymousContent list, and those survive
// across reframes and thus may already be flagged as being in an anonymous
// subtree. We don't really want to have this semi-broken state where
// anonymous nodes have a non-anonymous.
mCustomContentContainer->SetIsNativeAnonymousRoot();
aElements.AppendElement(mCustomContentContainer);
// Do not create an accessible object for the container.
mCustomContentContainer->SetAttr(kNameSpaceID_None, nsGkAtoms::role,
NS_LITERAL_STRING("presentation"), false);
mCustomContentContainer->SetAttr(
kNameSpaceID_None, nsGkAtoms::_class,
NS_LITERAL_STRING("moz-custom-content-container"), false);
// Only create a frame for mCustomContentContainer if it has some children.
if (doc->GetAnonymousContents().IsEmpty()) {
HideCustomContentContainer();
}
for (RefPtr<AnonymousContent>& anonContent : doc->GetAnonymousContents()) {
if (nsCOMPtr<nsINode> parent = anonContent->ContentNode().GetParentNode()) {
// Parent had better be an old custom content container already removed
// from a reframe. Forget about it since we're about to get inserted in a
// new one.
//
// TODO(emilio): Maybe we should extend PostDestroyData and do this stuff
// there instead, or something...
MOZ_ASSERT(parent != mCustomContentContainer);
MOZ_ASSERT(parent->IsElement());
MOZ_ASSERT(parent->AsElement()->IsRootOfNativeAnonymousSubtree());
MOZ_ASSERT(!parent->IsInComposedDoc());
MOZ_ASSERT(!parent->GetParentNode());
parent->RemoveChildNode(&anonContent->ContentNode(), false);
}
mCustomContentContainer->AppendChildTo(&anonContent->ContentNode(), false);
}
// Create a popupgroup element for chrome privileged top level non-XUL
// documents to support context menus and tooltips.
if (PresContext()->IsChrome() && PresContext()->IsRoot() &&
doc->AllowXULXBL()) {
nsNodeInfoManager* nodeInfoManager = doc->NodeInfoManager();
RefPtr<NodeInfo> nodeInfo =
nodeInfoManager->GetNodeInfo(nsGkAtoms::popupgroup, nullptr,
kNameSpaceID_XUL, nsINode::ELEMENT_NODE);
nsresult rv = NS_NewXULElement(getter_AddRefs(mPopupgroupContent),
nodeInfo.forget(), dom::NOT_FROM_PARSER);
NS_ENSURE_SUCCESS(rv, rv);
aElements.AppendElement(mPopupgroupContent);
nodeInfo = nodeInfoManager->GetNodeInfo(
nsGkAtoms::tooltip, nullptr, kNameSpaceID_XUL, nsINode::ELEMENT_NODE);
rv = NS_NewXULElement(getter_AddRefs(mTooltipContent), nodeInfo.forget(),
dom::NOT_FROM_PARSER);
NS_ENSURE_SUCCESS(rv, rv);
mTooltipContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_default,
NS_LITERAL_STRING("true"), false);
// Set the page attribute so the XBL binding will find the text for the
// tooltip from the currently hovered element.
mTooltipContent->SetAttr(kNameSpaceID_None, nsGkAtoms::page,
NS_LITERAL_STRING("true"), false);
aElements.AppendElement(mTooltipContent);
}
return NS_OK;
}
void nsCanvasFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) {
if (mCustomContentContainer) {
aElements.AppendElement(mCustomContentContainer);
}
if (mPopupgroupContent) {
aElements.AppendElement(mPopupgroupContent);
}
if (mTooltipContent) {
aElements.AppendElement(mTooltipContent);
}
}
void nsCanvasFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
nsIScrollableFrame* sf =
PresContext()->GetPresShell()->GetRootScrollFrameAsScrollable();
if (sf) {
sf->RemoveScrollPositionListener(this);
}
aPostDestroyData.AddAnonymousContent(mCustomContentContainer.forget());
if (mPopupgroupContent) {
aPostDestroyData.AddAnonymousContent(mPopupgroupContent.forget());
}
if (mTooltipContent) {
aPostDestroyData.AddAnonymousContent(mTooltipContent.forget());
}
MOZ_ASSERT(!mPopupSetFrame ||
nsLayoutUtils::IsProperAncestorFrame(this, mPopupSetFrame),
"Someone forgot to clear popup set frame");
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
void nsCanvasFrame::ScrollPositionWillChange(nscoord aX, nscoord aY) {
if (mDoPaintFocus) {
mDoPaintFocus = false;
PresShell()->GetRootFrame()->InvalidateFrameSubtree();
}
}
NS_IMETHODIMP
nsCanvasFrame::SetHasFocus(bool aHasFocus) {
if (mDoPaintFocus != aHasFocus) {
mDoPaintFocus = aHasFocus;
PresShell()->GetRootFrame()->InvalidateFrameSubtree();
if (!mAddedScrollPositionListener) {
nsIScrollableFrame* sf =
PresContext()->GetPresShell()->GetRootScrollFrameAsScrollable();
if (sf) {
sf->AddScrollPositionListener(this);
mAddedScrollPositionListener = true;
}
}
}
return NS_OK;
}
void nsCanvasFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
NS_ASSERTION(aListID != kPrincipalList || aChildList.IsEmpty() ||
aChildList.OnlyChild(),
"Primary child list can have at most one frame in it");
nsContainerFrame::SetInitialChildList(aListID, aChildList);
MaybePropagateRootElementWritingMode();
}
void nsCanvasFrame::AppendFrames(ChildListID aListID, nsFrameList& aFrameList) {
#ifdef DEBUG
MOZ_ASSERT(aListID == kPrincipalList, "unexpected child list");
if (!mFrames.IsEmpty()) {
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
// We only allow native anonymous child frames to be in principal child
// list in canvas frame.
MOZ_ASSERT(e.get()->GetContent()->IsInNativeAnonymousSubtree(),
"invalid child list");
}
}
nsFrame::VerifyDirtyBitSet(aFrameList);
#endif
nsContainerFrame::AppendFrames(aListID, aFrameList);
MaybePropagateRootElementWritingMode();
}
void nsCanvasFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList& aFrameList) {
// Because we only support a single child frame inserting is the same
// as appending
MOZ_ASSERT(!aPrevFrame, "unexpected previous sibling frame");
AppendFrames(aListID, aFrameList);
MaybePropagateRootElementWritingMode();
}
#ifdef DEBUG
void nsCanvasFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
MOZ_ASSERT(aListID == kPrincipalList, "unexpected child list");
nsContainerFrame::RemoveFrame(aListID, aOldFrame);
}
#endif
nsRect nsCanvasFrame::CanvasArea() const {
// Not clear which overflow rect we want here, but it probably doesn't
// matter.
nsRect result(GetVisualOverflowRect());
nsIScrollableFrame* scrollableFrame = do_QueryFrame(GetParent());
if (scrollableFrame) {
nsRect portRect = scrollableFrame->GetScrollPortRect();
result.UnionRect(result, nsRect(nsPoint(0, 0), portRect.Size()));
}
return result;
}
nsPopupSetFrame* nsCanvasFrame::GetPopupSetFrame() { return mPopupSetFrame; }
void nsCanvasFrame::SetPopupSetFrame(nsPopupSetFrame* aPopupSet) {
MOZ_ASSERT(!aPopupSet || !mPopupSetFrame,
"Popup set is already defined! Only 1 allowed.");
mPopupSetFrame = aPopupSet;
}
Element* nsCanvasFrame::GetDefaultTooltip() { return mTooltipContent; }
void nsCanvasFrame::SetDefaultTooltip(Element* aTooltip) {
MOZ_ASSERT(!aTooltip || aTooltip == mTooltipContent,
"Default tooltip should be anonymous content tooltip.");
mTooltipContent = aTooltip;
}
void nsDisplayCanvasBackgroundColor::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
if (NS_GET_A(mColor) > 0) {
DrawTarget* drawTarget = aCtx->GetDrawTarget();
int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
Rect devPxRect =
NSRectToSnappedRect(bgClipRect, appUnitsPerDevPixel, *drawTarget);
drawTarget->FillRect(devPxRect, ColorPattern(ToDeviceColor(mColor)));
}
}
already_AddRefed<Layer> nsDisplayCanvasBackgroundColor::BuildLayer(
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
const ContainerLayerParameters& aContainerParameters) {
if (NS_GET_A(mColor) == 0) {
return nullptr;
}
RefPtr<ColorLayer> layer = static_cast<ColorLayer*>(
aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
if (!layer) {
layer = aManager->CreateColorLayer();
if (!layer) {
return nullptr;
}
}
layer->SetColor(ToDeviceColor(mColor));
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
layer->SetBounds(bgClipRect.ToNearestPixels(appUnitsPerDevPixel));
layer->SetBaseTransform(gfx::Matrix4x4::Translation(
aContainerParameters.mOffset.x, aContainerParameters.mOffset.y, 0));
return layer.forget();
}
bool nsDisplayCanvasBackgroundColor::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc, RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
ContainerLayerParameters parameter;
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
LayoutDeviceRect rect =
LayoutDeviceRect::FromAppUnits(bgClipRect, appUnitsPerDevPixel);
wr::LayoutRect r = wr::ToLayoutRect(rect);
aBuilder.PushRect(r, r, !BackfaceIsHidden(),
wr::ToColorF(ToDeviceColor(mColor)));
return true;
}
#ifdef MOZ_DUMP_PAINTING
void nsDisplayCanvasBackgroundColor::WriteDebugInfo(
std::stringstream& aStream) {
aStream << " (rgba " << (int)NS_GET_R(mColor) << "," << (int)NS_GET_G(mColor)
<< "," << (int)NS_GET_B(mColor) << "," << (int)NS_GET_A(mColor)
<< ")";
}
#endif
void nsDisplayCanvasBackgroundImage::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
PaintInternal(aBuilder, aCtx, GetPaintRect(), &bgClipRect);
}
bool nsDisplayCanvasBackgroundImage::IsSingleFixedPositionImage(
nsDisplayListBuilder* aBuilder, const nsRect& aClipRect,
gfxRect* aDestRect) {
if (!mBackgroundStyle) return false;
if (mBackgroundStyle->StyleBackground()->mImage.mLayers.Length() != 1)
return false;
nsPresContext* presContext = mFrame->PresContext();
uint32_t flags = aBuilder->GetBackgroundPaintFlags();
nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
const nsStyleImageLayers::Layer& layer =
mBackgroundStyle->StyleBackground()->mImage.mLayers[mLayer];
if (layer.mAttachment != StyleImageLayerAttachment::Fixed) return false;
nsBackgroundLayerState state = nsCSSRendering::PrepareImageLayer(
presContext, mFrame, flags, borderArea, aClipRect, layer);
// We only care about images here, not gradients.
if (!mIsRasterImage) return false;
int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
*aDestRect =
nsLayoutUtils::RectToGfxRect(state.mFillArea, appUnitsPerDevPixel);
return true;
}
void nsDisplayCanvasThemedBackground::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
PaintInternal(aBuilder, aCtx, GetPaintRect(), &bgClipRect);
}
/**
* A display item to paint the focus ring for the document.
*
* The only reason this can't use nsDisplayGeneric is overriding GetBounds.
*/
class nsDisplayCanvasFocus : public nsPaintedDisplayItem {
public:
nsDisplayCanvasFocus(nsDisplayListBuilder* aBuilder, nsCanvasFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayCanvasFocus);
}
virtual ~nsDisplayCanvasFocus() { MOZ_COUNT_DTOR(nsDisplayCanvasFocus); }
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const override {
*aSnap = false;
// This is an overestimate, but that's not a problem.
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
return frame->CanvasArea() + ToReferenceFrame();
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) override {
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
frame->PaintFocus(aCtx->GetDrawTarget(), ToReferenceFrame());
}
NS_DISPLAY_DECL_NAME("CanvasFocus", TYPE_CANVAS_FOCUS)
};
void nsCanvasFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (GetPrevInFlow()) {
DisplayOverflowContainers(aBuilder, aLists);
}
// Force a background to be shown. We may have a background propagated to us,
// in which case StyleBackground wouldn't have the right background
// and the code in nsFrame::DisplayBorderBackgroundOutline might not give us
// a background.
// We don't have any border or outline, and our background draws over
// the overflow area, so just add nsDisplayCanvasBackground instead of
// calling DisplayBorderBackgroundOutline.
if (IsVisibleForPainting()) {
ComputedStyle* bg = nullptr;
nsIFrame* dependentFrame = nullptr;
bool isThemed = IsThemed();
if (!isThemed &&
nsCSSRendering::FindBackgroundFrame(this, &dependentFrame)) {
bg = dependentFrame->Style();
if (dependentFrame == this) {
dependentFrame = nullptr;
}
}
aLists.BorderBackground()->AppendNewToTop<nsDisplayCanvasBackgroundColor>(
aBuilder, this);
if (isThemed) {
aLists.BorderBackground()
->AppendNewToTop<nsDisplayCanvasThemedBackground>(aBuilder, this);
return;
}
if (!bg) {
return;
}
const ActiveScrolledRoot* asr = aBuilder->CurrentActiveScrolledRoot();
bool needBlendContainer = false;
nsDisplayListBuilder::AutoContainerASRTracker contASRTracker(aBuilder);
// Create separate items for each background layer.
const nsStyleImageLayers& layers = bg->StyleBackground()->mImage;
NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, layers) {
if (layers.mLayers[i].mImage.IsEmpty()) {
continue;
}
if (layers.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
needBlendContainer = true;
}
nsRect bgRect =
GetRectRelativeToSelf() + aBuilder->ToReferenceFrame(this);
const ActiveScrolledRoot* thisItemASR = asr;
nsDisplayList thisItemList;
nsDisplayBackgroundImage::InitData bgData =
nsDisplayBackgroundImage::GetInitData(aBuilder, this, i, bgRect, bg);
if (bgData.shouldFixToViewport) {
auto* displayData = aBuilder->GetCurrentFixedBackgroundDisplayData();
nsDisplayListBuilder::AutoBuildingDisplayList buildingDisplayList(
aBuilder, this, aBuilder->GetVisibleRect(),
aBuilder->GetDirtyRect());
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
nsDisplayListBuilder::AutoCurrentActiveScrolledRootSetter asrSetter(
aBuilder);
if (displayData) {
nsPoint offset =
GetOffsetTo(PresContext()->GetPresShell()->GetRootFrame());
aBuilder->SetVisibleRect(displayData->mVisibleRect + offset);
aBuilder->SetDirtyRect(displayData->mDirtyRect + offset);
clipState.SetClipChainForContainingBlockDescendants(
displayData->mContainingBlockClipChain);
asrSetter.SetCurrentActiveScrolledRoot(
displayData->mContainingBlockActiveScrolledRoot);
thisItemASR = displayData->mContainingBlockActiveScrolledRoot;
}
nsDisplayCanvasBackgroundImage* bgItem = nullptr;
{
DisplayListClipState::AutoSaveRestore bgImageClip(aBuilder);
bgImageClip.Clear();
bgItem = MakeDisplayItem<nsDisplayCanvasBackgroundImage>(
aBuilder, this, bgData);
if (bgItem) {
bgItem->SetDependentFrame(aBuilder, dependentFrame);
}
}
if (bgItem) {
thisItemList.AppendToTop(
nsDisplayFixedPosition::CreateForFixedBackground(aBuilder, this,
bgItem, i));
}
} else {
nsDisplayCanvasBackgroundImage* bgItem =
MakeDisplayItem<nsDisplayCanvasBackgroundImage>(aBuilder, this,
bgData);
if (bgItem) {
bgItem->SetDependentFrame(aBuilder, dependentFrame);
thisItemList.AppendToTop(bgItem);
}
}
if (layers.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
DisplayListClipState::AutoSaveRestore blendClip(aBuilder);
thisItemList.AppendNewToTop<nsDisplayBlendMode>(
aBuilder, this, &thisItemList, layers.mLayers[i].mBlendMode,
thisItemASR, i + 1);
}
aLists.BorderBackground()->AppendToTop(&thisItemList);
}
if (needBlendContainer) {
const ActiveScrolledRoot* containerASR = contASRTracker.GetContainerASR();
DisplayListClipState::AutoSaveRestore blendContainerClip(aBuilder);
aLists.BorderBackground()->AppendToTop(
nsDisplayBlendContainer::CreateForBackgroundBlendMode(
aBuilder, this, aLists.BorderBackground(), containerASR));
}
}
for (nsIFrame* kid : PrincipalChildList()) {
// Put our child into its own pseudo-stack.
BuildDisplayListForChild(aBuilder, kid, aLists);
}
#ifdef DEBUG_CANVAS_FOCUS
nsCOMPtr<nsIContent> focusContent;
aPresContext->EventStateManager()->GetFocusedContent(
getter_AddRefs(focusContent));
bool hasFocus = false;
nsCOMPtr<nsISupports> container;
aPresContext->GetContainer(getter_AddRefs(container));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (docShell) {
docShell->GetHasFocus(&hasFocus);
nsRect dirty = aBuilder->GetDirtyRect();
printf("%p - nsCanvasFrame::Paint R:%d,%d,%d,%d DR: %d,%d,%d,%d\n", this,
mRect.x, mRect.y, mRect.width, mRect.height, dirty.x, dirty.y,
dirty.width, dirty.height);
}
printf("%p - Focus: %s c: %p DoPaint:%s\n", docShell.get(),
hasFocus ? "Y" : "N", focusContent.get(), mDoPaintFocus ? "Y" : "N");
#endif
if (!mDoPaintFocus) return;
// Only paint the focus if we're visible
if (!StyleVisibility()->IsVisible()) return;
aLists.Outlines()->AppendNewToTop<nsDisplayCanvasFocus>(aBuilder, this);
}
void nsCanvasFrame::PaintFocus(DrawTarget* aDrawTarget, nsPoint aPt) {
nsRect focusRect(aPt, GetSize());
nsIScrollableFrame* scrollableFrame = do_QueryFrame(GetParent());
if (scrollableFrame) {
nsRect portRect = scrollableFrame->GetScrollPortRect();
focusRect.width = portRect.width;
focusRect.height = portRect.height;
focusRect.MoveBy(scrollableFrame->GetScrollPosition());
}
// XXX use the root frame foreground color, but should we find BODY frame
// for HTML documents?
nsIFrame* root = mFrames.FirstChild();
const auto* text = root ? root->StyleText() : StyleText();
nsCSSRendering::PaintFocus(PresContext(), aDrawTarget, focusRect,
text->mColor.ToColor());
}
/* virtual */
nscoord nsCanvasFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_MIN_INLINE_SIZE(this, result);
if (mFrames.IsEmpty())
result = 0;
else
result = mFrames.FirstChild()->GetMinISize(aRenderingContext);
return result;
}
/* virtual */
nscoord nsCanvasFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_PREF_INLINE_SIZE(this, result);
if (mFrames.IsEmpty())
result = 0;
else
result = mFrames.FirstChild()->GetPrefISize(aRenderingContext);
return result;
}
void nsCanvasFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsCanvasFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_FRAME_TRACE_REFLOW_IN("nsCanvasFrame::Reflow");
nsCanvasFrame* prevCanvasFrame = static_cast<nsCanvasFrame*>(GetPrevInFlow());
if (prevCanvasFrame) {
AutoFrameListPtr overflow(aPresContext,
prevCanvasFrame->StealOverflowFrames());
if (overflow) {
NS_ASSERTION(overflow->OnlyChild(),
"must have doc root as canvas frame's only child");
nsContainerFrame::ReparentFrameViewList(*overflow, prevCanvasFrame, this);
// Prepend overflow to the our child list. There may already be
// children placeholders for fixed-pos elements, which don't get
// reflowed but must not be lost until the canvas frame is destroyed.
mFrames.InsertFrames(this, nullptr, *overflow);
}
}
// Set our size up front, since some parts of reflow depend on it
// being already set. Note that the computed height may be
// unconstrained; that's ok. Consumers should watch out for that.
SetSize(nsSize(aReflowInput.ComputedWidth(), aReflowInput.ComputedHeight()));
// Reflow our one and only normal child frame. It's either the root
// element's frame or a placeholder for that frame, if the root element
// is abs-pos or fixed-pos. We may have additional children which
// are placeholders for continuations of fixed-pos content, but those
// don't need to be reflowed. The normal child is always comes before
// the fixed-pos placeholders, because we insert it at the start
// of the child list, above.
ReflowOutput kidDesiredSize(aReflowInput);
if (mFrames.IsEmpty()) {
// We have no child frame, so return an empty size
aDesiredSize.Width() = aDesiredSize.Height() = 0;
} else if (mFrames.FirstChild() != mPopupSetFrame) {
nsIFrame* kidFrame = mFrames.FirstChild();
bool kidDirty = (kidFrame->GetStateBits() & NS_FRAME_IS_DIRTY) != 0;
ReflowInput kidReflowInput(
aPresContext, aReflowInput, kidFrame,
aReflowInput.AvailableSize(kidFrame->GetWritingMode()));
if (aReflowInput.IsBResizeForWM(kidReflowInput.GetWritingMode()) &&
(kidFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_BSIZE)) {
// Tell our kid it's being block-dir resized too. Bit of a
// hack for framesets.
kidReflowInput.SetBResize(true);
}
WritingMode wm = aReflowInput.GetWritingMode();
WritingMode kidWM = kidReflowInput.GetWritingMode();
nsSize containerSize = aReflowInput.ComputedPhysicalSize();
LogicalMargin margin = kidReflowInput.ComputedLogicalMargin();
LogicalPoint kidPt(kidWM, margin.IStart(kidWM), margin.BStart(kidWM));
// Reflow the frame
ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowInput, kidWM,
kidPt, containerSize, ReflowChildFlags::Default, aStatus);
// Complete the reflow and position and size the child frame
FinishReflowChild(kidFrame, aPresContext, kidDesiredSize, &kidReflowInput,
kidWM, kidPt, containerSize,
ReflowChildFlags::ApplyRelativePositioning);
if (!aStatus.IsFullyComplete()) {
nsIFrame* nextFrame = kidFrame->GetNextInFlow();
NS_ASSERTION(
nextFrame || aStatus.NextInFlowNeedsReflow(),
"If it's incomplete and has no nif yet, it must flag a nif reflow.");
if (!nextFrame) {
nextFrame = aPresContext->PresShell()
->FrameConstructor()
->CreateContinuingFrame(aPresContext, kidFrame, this);
SetOverflowFrames(nsFrameList(nextFrame, nextFrame));
// Root overflow containers will be normal children of
// the canvas frame, but that's ok because there
// aren't any other frames we need to isolate them from
// during reflow.
}
if (aStatus.IsOverflowIncomplete()) {
nextFrame->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
}
// If the child frame was just inserted, then we're responsible for making
// sure it repaints
if (kidDirty) {
// But we have a new child, which will affect our background, so
// invalidate our whole rect.
// Note: Even though we request to be sized to our child's size, our
// scroll frame ensures that we are always the size of the viewport.
// Also note: GetPosition() on a CanvasFrame is always going to return
// (0, 0). We only want to invalidate GetRect() since Get*OverflowRect()
// could also include overflow to our top and left (out of the viewport)
// which doesn't need to be painted.
nsIFrame* viewport = PresContext()->GetPresShell()->GetRootFrame();
viewport->InvalidateFrame();
}
// Return our desired size. Normally it's what we're told, but
// sometimes we can be given an unconstrained height (when a window
// is sizing-to-content), and we should compute our desired height.
LogicalSize finalSize(wm);
finalSize.ISize(wm) = aReflowInput.ComputedISize();
if (aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE) {
finalSize.BSize(wm) =
kidFrame->GetLogicalSize(wm).BSize(wm) +
kidReflowInput.ComputedLogicalMargin().BStartEnd(wm);
} else {
finalSize.BSize(wm) = aReflowInput.ComputedBSize();
}
aDesiredSize.SetSize(wm, finalSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
aDesiredSize.mOverflowAreas.UnionWith(kidDesiredSize.mOverflowAreas +
kidFrame->GetPosition());
}
if (prevCanvasFrame) {
ReflowOverflowContainerChildren(aPresContext, aReflowInput,
aDesiredSize.mOverflowAreas,
ReflowChildFlags::Default, aStatus);
}
if (mPopupSetFrame) {
MOZ_ASSERT(mFrames.ContainsFrame(mPopupSetFrame),
"Only normal flow supported.");
nsReflowStatus popupStatus;
ReflowOutput popupDesiredSize(aReflowInput.GetWritingMode());
WritingMode wm = mPopupSetFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput popupReflowInput(aPresContext, aReflowInput, mPopupSetFrame,
availSize);
ReflowChild(mPopupSetFrame, aPresContext, popupDesiredSize,
popupReflowInput, 0, 0, ReflowChildFlags::NoMoveFrame,
popupStatus);
FinishReflowChild(mPopupSetFrame, aPresContext, popupDesiredSize,
&popupReflowInput, 0, 0, ReflowChildFlags::NoMoveFrame);
}
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput,
aStatus);
NS_FRAME_TRACE_REFLOW_OUT("nsCanvasFrame::Reflow", aStatus);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
nsresult nsCanvasFrame::GetContentForEvent(WidgetEvent* aEvent,
nsIContent** aContent) {
NS_ENSURE_ARG_POINTER(aContent);
nsresult rv = nsFrame::GetContentForEvent(aEvent, aContent);
if (NS_FAILED(rv) || !*aContent) {
nsIFrame* kid = mFrames.FirstChild();
if (kid) {
rv = kid->GetContentForEvent(aEvent, aContent);
}
}
return rv;
}
void nsCanvasFrame::MaybePropagateRootElementWritingMode() {
nsIFrame* child = PrincipalChildList().FirstChild();
if (child && child->GetContent() &&
child->GetContent() == PresContext()->Document()->GetRootElement()) {
nsIFrame* childPrimary = child->GetContent()->GetPrimaryFrame();
PropagateRootElementWritingMode(childPrimary->GetWritingMode());
}
}
#ifdef DEBUG_FRAME_DUMP
nsresult nsCanvasFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(NS_LITERAL_STRING("Canvas"), aResult);
}
#endif
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку