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gecko-dev/layout/generic/nsBulletFrame.cpp

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/* -*- 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 for list-item bullets */
#include "nsBulletFrame.h"
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "gfxPrefs.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/PathHelpers.h"
#include "mozilla/layers/LayersMessages.h"
#include "mozilla/layers/StackingContextHelper.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "mozilla/layers/WebRenderMessages.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Move.h"
#include "nsCOMPtr.h"
#include "nsFontMetrics.h"
#include "nsGkAtoms.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIDocument.h"
#include "nsDisplayList.h"
#include "nsCounterManager.h"
#include "nsBidiUtils.h"
#include "CounterStyleManager.h"
#include "UnitTransforms.h"
#include "imgIContainer.h"
#include "ImageLayers.h"
#include "imgRequestProxy.h"
#include "nsIURI.h"
#include "SVGImageContext.h"
#include "TextDrawTarget.h"
#include "mozilla/layers/WebRenderBridgeChild.h"
#include <algorithm>
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::image;
using namespace mozilla::layout;
NS_DECLARE_FRAME_PROPERTY_SMALL_VALUE(FontSizeInflationProperty, float)
NS_IMPL_FRAMEARENA_HELPERS(nsBulletFrame)
#ifdef DEBUG
NS_QUERYFRAME_HEAD(nsBulletFrame)
NS_QUERYFRAME_ENTRY(nsBulletFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsFrame)
#endif
nsBulletFrame::~nsBulletFrame()
{
}
void
nsBulletFrame::DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData)
{
// Stop image loading first.
DeregisterAndCancelImageRequest();
if (mListener) {
mListener->SetFrame(nullptr);
}
// Let base class do the rest
nsFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
#ifdef DEBUG_FRAME_DUMP
nsresult
nsBulletFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Bullet"), aResult);
}
#endif
bool
nsBulletFrame::IsEmpty()
{
return IsSelfEmpty();
}
bool
nsBulletFrame::IsSelfEmpty()
{
return StyleList()->mCounterStyle->IsNone();
}
/* virtual */ void
nsBulletFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
nsFrame::DidSetStyleContext(aOldStyleContext);
imgRequestProxy *newRequest = StyleList()->GetListStyleImage();
if (newRequest) {
if (!mListener) {
mListener = new nsBulletListener();
mListener->SetFrame(this);
}
bool needNewRequest = true;
if (mImageRequest) {
// Reload the image, maybe...
nsCOMPtr<nsIURI> oldURI;
mImageRequest->GetURI(getter_AddRefs(oldURI));
nsCOMPtr<nsIURI> newURI;
newRequest->GetURI(getter_AddRefs(newURI));
if (oldURI && newURI) {
bool same;
newURI->Equals(oldURI, &same);
if (same) {
needNewRequest = false;
}
}
}
if (needNewRequest) {
RefPtr<imgRequestProxy> newRequestClone;
newRequest->SyncClone(mListener,
PresContext()->Document(),
getter_AddRefs(newRequestClone));
// Deregister the old request. We wait until after Clone is done in case
// the old request and the new request are the same underlying image
// accessed via different URLs.
DeregisterAndCancelImageRequest();
// Register the new request.
mImageRequest = Move(newRequestClone);
RegisterImageRequest(/* aKnownToBeAnimated = */ false);
}
} else {
// No image request on the new style context.
DeregisterAndCancelImageRequest();
}
#ifdef ACCESSIBILITY
// Update the list bullet accessible. If old style list isn't available then
// no need to update the accessible tree because it's not created yet.
if (aOldStyleContext) {
nsAccessibilityService* accService = nsIPresShell::AccService();
if (accService) {
const nsStyleList* oldStyleList = aOldStyleContext->PeekStyleList();
if (oldStyleList) {
bool hadBullet = oldStyleList->GetListStyleImage() ||
!oldStyleList->mCounterStyle->IsNone();
const nsStyleList* newStyleList = StyleList();
bool hasBullet = newStyleList->GetListStyleImage() ||
!newStyleList->mCounterStyle->IsNone();
if (hadBullet != hasBullet) {
accService->UpdateListBullet(PresContext()->GetPresShell(), mContent,
hasBullet);
}
}
}
}
#endif
}
class nsDisplayBulletGeometry
: public nsDisplayItemGenericGeometry
, public nsImageGeometryMixin<nsDisplayBulletGeometry>
{
public:
nsDisplayBulletGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
: nsDisplayItemGenericGeometry(aItem, aBuilder)
, nsImageGeometryMixin(aItem, aBuilder)
{
nsBulletFrame* f = static_cast<nsBulletFrame*>(aItem->Frame());
mOrdinal = f->GetOrdinal();
}
virtual bool InvalidateForSyncDecodeImages() const override
{
return ShouldInvalidateToSyncDecodeImages();
}
int32_t mOrdinal;
};
class BulletRenderer final
{
public:
BulletRenderer(imgIContainer* image, const nsRect& dest)
: mImage(image)
, mDest(dest)
, mListStyleType(NS_STYLE_LIST_STYLE_NONE)
{
MOZ_ASSERT(IsImageType());
}
BulletRenderer(Path* path, nscolor color, int32_t listStyleType)
: mColor(color)
, mPath(path)
, mListStyleType(listStyleType)
{
MOZ_ASSERT(IsPathType());
}
BulletRenderer(const LayoutDeviceRect& aPathRect, nscolor color, int32_t listStyleType)
: mPathRect(aPathRect)
, mColor(color)
, mListStyleType(listStyleType)
{
MOZ_ASSERT(IsPathType());
}
BulletRenderer(const nsString& text,
nsFontMetrics* fm,
nscolor color,
const nsPoint& point,
int32_t listStyleType)
: mColor(color)
, mText(text)
, mFontMetrics(fm)
, mPoint(point)
, mListStyleType(listStyleType)
{
MOZ_ASSERT(IsTextType());
}
bool
CreateWebRenderCommands(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder);
ImgDrawResult
Paint(gfxContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect, uint32_t aFlags,
bool aDisableSubpixelAA, nsIFrame* aFrame);
bool
IsImageType() const
{
return mListStyleType == NS_STYLE_LIST_STYLE_NONE && mImage;
}
bool
IsPathType() const
{
return mListStyleType == NS_STYLE_LIST_STYLE_DISC ||
mListStyleType == NS_STYLE_LIST_STYLE_CIRCLE ||
mListStyleType == NS_STYLE_LIST_STYLE_SQUARE ||
mListStyleType == NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN ||
mListStyleType == NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED;
}
bool
IsTextType() const
{
return mListStyleType != NS_STYLE_LIST_STYLE_NONE &&
mListStyleType != NS_STYLE_LIST_STYLE_DISC &&
mListStyleType != NS_STYLE_LIST_STYLE_CIRCLE &&
mListStyleType != NS_STYLE_LIST_STYLE_SQUARE &&
mListStyleType != NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN &&
mListStyleType != NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED &&
!mText.IsEmpty();
}
bool
BuildGlyphForText(nsDisplayItem* aItem, bool disableSubpixelAA);
void
PaintTextToContext(nsIFrame* aFrame,
gfxContext* aCtx,
bool aDisableSubpixelAA);
bool
IsImageContainerAvailable(layers::LayerManager* aManager, uint32_t aFlags);
private:
bool
CreateWebRenderCommandsForImage(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder);
bool
CreateWebRenderCommandsForPath(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder);
bool
CreateWebRenderCommandsForText(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder);
private:
// mImage and mDest are the properties for list-style-image.
// mImage is the image content and mDest is the image position.
RefPtr<imgIContainer> mImage;
nsRect mDest;
// Some bullet types are stored as a rect (in device pixels) instead of a Path to allow
// generating proper WebRender commands. When webrender is disabled the Path is lazily created
// for these items before painting.
// TODO: The size of this structure doesn't seem to be an issue since it has so many fields
// that are specific to a bullet style or another, but if it becomes one we can easily
// store mDest and mPathRect into the same memory location since they are never used by
// the same bullet types.
LayoutDeviceRect mPathRect;
// mColor indicate the color of list-style. Both text and path type would use this memeber.
nscolor mColor;
// mPath record the path of the list-style for later drawing.
// Included following types: square, circle, disc, disclosure open and disclosure closed.
RefPtr<Path> mPath;
// mText, mFontMertrics, mPoint, mFont and mGlyphs are for other
// list-style-type which can be drawed by text.
nsString mText;
RefPtr<nsFontMetrics> mFontMetrics;
nsPoint mPoint;
RefPtr<ScaledFont> mFont;
nsTArray<layers::GlyphArray> mGlyphs;
// Store the type of list-style-type.
int32_t mListStyleType;
};
bool
BulletRenderer::CreateWebRenderCommands(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder)
{
if (IsImageType()) {
return CreateWebRenderCommandsForImage(aItem, aBuilder, aResources,
aSc, aManager, aDisplayListBuilder);
} else if (IsPathType()) {
return CreateWebRenderCommandsForPath(aItem, aBuilder, aResources,
aSc, aManager, aDisplayListBuilder);
} else {
MOZ_ASSERT(IsTextType());
return CreateWebRenderCommandsForText(aItem, aBuilder, aResources, aSc,
aManager, aDisplayListBuilder);
}
}
ImgDrawResult
BulletRenderer::Paint(gfxContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect, uint32_t aFlags,
bool aDisableSubpixelAA, nsIFrame* aFrame)
{
if (IsImageType()) {
SamplingFilter filter = nsLayoutUtils::GetSamplingFilterForFrame(aFrame);
return nsLayoutUtils::DrawSingleImage(aRenderingContext,
aFrame->PresContext(), mImage, filter,
mDest, aDirtyRect,
/* no SVGImageContext */ Nothing(),
aFlags);
}
if (IsPathType()) {
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
if (!mPath) {
RefPtr<PathBuilder> builder = drawTarget->CreatePathBuilder();
switch (mListStyleType) {
case NS_STYLE_LIST_STYLE_CIRCLE:
case NS_STYLE_LIST_STYLE_DISC:
AppendEllipseToPath(builder, mPathRect.Center().ToUnknownPoint(), mPathRect.Size().ToUnknownSize());
break;
case NS_STYLE_LIST_STYLE_SQUARE:
AppendRectToPath(builder, mPathRect.ToUnknownRect());
break;
default:
MOZ_ASSERT(false, "Should have a parth.");
}
mPath = builder->Finish();
}
switch (mListStyleType) {
case NS_STYLE_LIST_STYLE_CIRCLE:
drawTarget->Stroke(mPath, ColorPattern(ToDeviceColor(mColor)));
break;
case NS_STYLE_LIST_STYLE_DISC:
case NS_STYLE_LIST_STYLE_SQUARE:
case NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED:
case NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN:
drawTarget->Fill(mPath, ColorPattern(ToDeviceColor(mColor)));
break;
default:
MOZ_CRASH("unreachable");
}
}
if (IsTextType()) {
PaintTextToContext(aFrame, &aRenderingContext, aDisableSubpixelAA);
}
return ImgDrawResult::SUCCESS;
}
bool
BulletRenderer::BuildGlyphForText(nsDisplayItem* aItem, bool disableSubpixelAA)
{
MOZ_ASSERT(IsTextType());
RefPtr<DrawTarget> screenTarget = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
RefPtr<DrawTargetCapture> capture =
Factory::CreateCaptureDrawTarget(screenTarget->GetBackendType(),
IntSize(),
screenTarget->GetFormat());
RefPtr<gfxContext> captureCtx = gfxContext::CreateOrNull(capture);
PaintTextToContext(aItem->Frame(), captureCtx, disableSubpixelAA);
layers::GlyphArray* g = mGlyphs.AppendElement();
std::vector<Glyph> glyphs;
Color color;
if (!capture->ContainsOnlyColoredGlyphs(mFont, color, glyphs)) {
mFont = nullptr;
mGlyphs.Clear();
return false;
}
g->glyphs().SetLength(glyphs.size());
PodCopy(g->glyphs().Elements(), glyphs.data(), glyphs.size());
g->color() = color;
return true;
}
void
BulletRenderer::PaintTextToContext(nsIFrame* aFrame,
gfxContext* aCtx,
bool aDisableSubpixelAA)
{
MOZ_ASSERT(IsTextType());
DrawTarget* drawTarget = aCtx->GetDrawTarget();
DrawTargetAutoDisableSubpixelAntialiasing
disable(drawTarget, aDisableSubpixelAA);
aCtx->SetColor(Color::FromABGR(mColor));
nsPresContext* presContext = aFrame->PresContext();
if (!presContext->BidiEnabled() && HasRTLChars(mText)) {
presContext->SetBidiEnabled();
}
nsLayoutUtils::DrawString(aFrame, *mFontMetrics, aCtx,
mText.get(), mText.Length(), mPoint);
}
bool
BulletRenderer::IsImageContainerAvailable(layers::LayerManager* aManager, uint32_t aFlags)
{
MOZ_ASSERT(IsImageType());
return mImage->IsImageContainerAvailable(aManager, aFlags);
}
bool
BulletRenderer::CreateWebRenderCommandsForImage(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder)
{
MOZ_RELEASE_ASSERT(IsImageType());
MOZ_RELEASE_ASSERT(mImage);
uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
if (aDisplayListBuilder->IsPaintingToWindow()) {
flags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
}
if (aDisplayListBuilder->ShouldSyncDecodeImages()) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
const int32_t appUnitsPerDevPixel = aItem->Frame()->PresContext()->AppUnitsPerDevPixel();
LayoutDeviceRect destRect = LayoutDeviceRect::FromAppUnits(mDest, appUnitsPerDevPixel);
Maybe<SVGImageContext> svgContext;
gfx::IntSize decodeSize =
nsLayoutUtils::ComputeImageContainerDrawingParameters(mImage, aItem->Frame(), destRect,
aSc, flags, svgContext);
RefPtr<layers::ImageContainer> container =
mImage->GetImageContainerAtSize(aManager, decodeSize, svgContext, flags);
if (!container) {
return false;
}
gfx::IntSize size;
Maybe<wr::ImageKey> key = aManager->CommandBuilder().CreateImageKey(aItem, container, aBuilder, aResources,
aSc, size, Nothing());
if (key.isNothing()) {
return true; // Nothing to do
}
wr::LayoutRect dest = aSc.ToRelativeLayoutRect(destRect);
aBuilder.PushImage(dest,
dest,
!aItem->BackfaceIsHidden(),
wr::ImageRendering::Auto,
key.value());
return true;
}
bool
BulletRenderer::CreateWebRenderCommandsForPath(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder)
{
MOZ_ASSERT(IsPathType());
wr::LayoutRect dest = aSc.ToRelativeLayoutRect(mPathRect);
auto color = wr::ToColorF(ToDeviceColor(mColor));
bool isBackfaceVisible = !aItem->BackfaceIsHidden();
switch (mListStyleType) {
case NS_STYLE_LIST_STYLE_CIRCLE: {
LayoutDeviceSize radii = mPathRect.Size() / 2.0;
auto borderWidths = wr::ToBorderWidths(1.0, 1.0, 1.0, 1.0);
wr::BorderSide side = { color, wr::BorderStyle::Solid };
wr::BorderSide sides[4] = { side, side, side, side };
Range<const wr::BorderSide> sidesRange(sides, 4);
aBuilder.PushBorder(dest, dest, isBackfaceVisible, borderWidths,
sidesRange,
wr::ToBorderRadius(radii, radii, radii, radii));
return true;
}
case NS_STYLE_LIST_STYLE_DISC: {
nsTArray<wr::ComplexClipRegion> clips;
clips.AppendElement(wr::ToComplexClipRegion(
RoundedRect(ThebesRect(mPathRect.ToUnknownRect()),
RectCornerRadii(dest.size.width / 2.0))
));
auto clipId = aBuilder.DefineClip(Nothing(), Nothing(), dest, &clips, nullptr);
aBuilder.PushClip(clipId);
aBuilder.PushRect(dest, dest, isBackfaceVisible, color);
aBuilder.PopClip();
return true;
}
case NS_STYLE_LIST_STYLE_SQUARE: {
aBuilder.PushRect(dest, dest, isBackfaceVisible, color);
return true;
}
default:
if (!aManager->CommandBuilder().PushItemAsImage(aItem, aBuilder, aResources, aSc, aDisplayListBuilder)) {
NS_WARNING("Fail to create WebRender commands for Bullet path.");
return false;
}
}
return true;
}
bool
BulletRenderer::CreateWebRenderCommandsForText(nsDisplayItem* aItem,
wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const layers::StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder)
{
MOZ_ASSERT(IsTextType());
bool dummy;
nsRect bounds = aItem->GetBounds(aDisplayListBuilder, &dummy);
if (bounds.IsEmpty()) {
return true;
}
RefPtr<TextDrawTarget> textDrawer = new TextDrawTarget(aBuilder, aSc, aManager, aItem, bounds);
RefPtr<gfxContext> captureCtx = gfxContext::CreateOrNull(textDrawer);
PaintTextToContext(aItem->Frame(), captureCtx, aItem->IsSubpixelAADisabled());
textDrawer->TerminateShadows();
return !textDrawer->HasUnsupportedFeatures();
}
class nsDisplayBullet final : public nsDisplayItem {
public:
nsDisplayBullet(nsDisplayListBuilder* aBuilder, nsBulletFrame* aFrame)
: nsDisplayItem(aBuilder, aFrame)
{
MOZ_COUNT_CTOR(nsDisplayBullet);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayBullet() {
MOZ_COUNT_DTOR(nsDisplayBullet);
}
#endif
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const override
{
*aSnap = false;
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}
virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerLayerParameters& aParameters) override;
virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerLayerParameters& aParameters) override;
virtual bool CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue&,
const StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override;
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState,
nsTArray<nsIFrame*> *aOutFrames) override {
aOutFrames->AppendElement(mFrame);
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) override;
NS_DISPLAY_DECL_NAME("Bullet", TYPE_BULLET)
virtual nsRect GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder) const override
{
bool snap;
return GetBounds(aBuilder, &snap);
}
virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override
{
return new nsDisplayBulletGeometry(this, aBuilder);
}
virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) const override
{
const nsDisplayBulletGeometry* geometry = static_cast<const nsDisplayBulletGeometry*>(aGeometry);
nsBulletFrame* f = static_cast<nsBulletFrame*>(mFrame);
if (f->GetOrdinal() != geometry->mOrdinal) {
bool snap;
aInvalidRegion->Or(geometry->mBounds, GetBounds(aBuilder, &snap));
return;
}
nsCOMPtr<imgIContainer> image = f->GetImage();
if (aBuilder->ShouldSyncDecodeImages() && image &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
return nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
protected:
Maybe<BulletRenderer> mBulletRenderer;
};
LayerState
nsDisplayBullet::GetLayerState(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerLayerParameters& aParameters)
{
if (!ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBulletLayers)) {
return LAYER_NONE;
}
RefPtr<gfxContext> screenRefCtx = gfxContext::CreateOrNull(
gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget().get());
Maybe<BulletRenderer> br = static_cast<nsBulletFrame*>(mFrame)->
CreateBulletRenderer(*screenRefCtx, ToReferenceFrame());
if (!br) {
return LAYER_NONE;
}
if (br->IsImageType()) {
uint32_t flags = aBuilder->ShouldSyncDecodeImages()
? imgIContainer::FLAG_SYNC_DECODE
: imgIContainer::FLAG_NONE;
if (!br->IsImageContainerAvailable(aManager, flags)) {
return LAYER_NONE;
}
}
if (br->IsTextType()) {
if (!br->BuildGlyphForText(this, mDisableSubpixelAA)) {
return LAYER_NONE;
}
}
mBulletRenderer = br;
return LAYER_ACTIVE;
}
already_AddRefed<layers::Layer>
nsDisplayBullet::BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerLayerParameters& aContainerParameters)
{
if (!mBulletRenderer) {
return nullptr;
}
return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
}
bool
nsDisplayBullet::CreateWebRenderCommands(wr::DisplayListBuilder& aBuilder,
wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::WebRenderLayerManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder)
{
// FIXME: avoid needing to make this target if we're drawing text
// (non-trivial refactor of all this code)
RefPtr<gfxContext> screenRefCtx = gfxContext::CreateOrNull(
gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget().get());
Maybe<BulletRenderer> br = static_cast<nsBulletFrame*>(mFrame)->
CreateBulletRenderer(*screenRefCtx, ToReferenceFrame());
if (!br) {
return false;
}
return br->CreateWebRenderCommands(this, aBuilder, aResources, aSc,
aManager, aDisplayListBuilder);
}
void nsDisplayBullet::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx)
{
uint32_t flags = imgIContainer::FLAG_NONE;
if (aBuilder->ShouldSyncDecodeImages()) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
ImgDrawResult result = static_cast<nsBulletFrame*>(mFrame)->
PaintBullet(*aCtx, ToReferenceFrame(), mVisibleRect, flags,
mDisableSubpixelAA);
nsDisplayBulletGeometry::UpdateDrawResult(this, result);
}
void
nsBulletFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return;
DO_GLOBAL_REFLOW_COUNT_DSP("nsBulletFrame");
aLists.Content()->AppendToTop(
new (aBuilder) nsDisplayBullet(aBuilder, this));
}
Maybe<BulletRenderer>
nsBulletFrame::CreateBulletRenderer(gfxContext& aRenderingContext, nsPoint aPt)
{
const nsStyleList* myList = StyleList();
CounterStyle* listStyleType = myList->mCounterStyle;
nsMargin padding = mPadding.GetPhysicalMargin(GetWritingMode());
if (myList->GetListStyleImage() && mImageRequest) {
uint32_t status;
mImageRequest->GetImageStatus(&status);
if (status & imgIRequest::STATUS_LOAD_COMPLETE &&
!(status & imgIRequest::STATUS_ERROR)) {
nsCOMPtr<imgIContainer> imageCon;
mImageRequest->GetImage(getter_AddRefs(imageCon));
if (imageCon) {
nsRect dest(padding.left, padding.top,
mRect.width - (padding.left + padding.right),
mRect.height - (padding.top + padding.bottom));
BulletRenderer br(imageCon, dest + aPt);
return Some(br);
}
}
}
nscolor color = nsLayoutUtils::GetColor(this, &nsStyleColor::mColor);
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel();
switch (listStyleType->GetStyle()) {
case NS_STYLE_LIST_STYLE_NONE:
return Nothing();
case NS_STYLE_LIST_STYLE_DISC:
case NS_STYLE_LIST_STYLE_CIRCLE:
{
nsRect rect(padding.left + aPt.x,
padding.top + aPt.y,
mRect.width - (padding.left + padding.right),
mRect.height - (padding.top + padding.bottom));
auto devPxRect = LayoutDeviceRect::FromAppUnits(rect, appUnitsPerDevPixel);
return Some(BulletRenderer(devPxRect, color, listStyleType->GetStyle()));
}
case NS_STYLE_LIST_STYLE_SQUARE:
{
nsRect rect(aPt, mRect.Size());
rect.Deflate(padding);
// Snap the height and the width of the rectangle to device pixels,
// and then center the result within the original rectangle, so that
// all square bullets at the same font size have the same visual
// size (bug 376690).
// FIXME: We should really only do this if we're not transformed
// (like gfxContext::UserToDevicePixelSnapped does).
nsPresContext *pc = PresContext();
nsRect snapRect(rect.x, rect.y,
pc->RoundAppUnitsToNearestDevPixels(rect.width),
pc->RoundAppUnitsToNearestDevPixels(rect.height));
snapRect.MoveBy((rect.width - snapRect.width) / 2,
(rect.height - snapRect.height) / 2);
auto devPxRect = LayoutDeviceRect::FromAppUnits(snapRect, appUnitsPerDevPixel);
return Some(BulletRenderer(devPxRect, color, listStyleType->GetStyle()));
}
case NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED:
case NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN:
{
nsRect rect(aPt, mRect.Size());
rect.Deflate(padding);
WritingMode wm = GetWritingMode();
bool isVertical = wm.IsVertical();
bool isClosed =
listStyleType->GetStyle() == NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED;
bool isDown = (!isVertical && !isClosed) || (isVertical && isClosed);
nscoord diff = NSToCoordRound(0.1f * rect.height);
if (isDown) {
rect.y += diff * 2;
rect.height -= diff * 2;
} else {
rect.Deflate(diff, 0);
}
nsPresContext *pc = PresContext();
rect.x = pc->RoundAppUnitsToNearestDevPixels(rect.x);
rect.y = pc->RoundAppUnitsToNearestDevPixels(rect.y);
RefPtr<PathBuilder> builder = drawTarget->CreatePathBuilder();
if (isDown) {
// to bottom
builder->MoveTo(NSPointToPoint(rect.TopLeft(), appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint(rect.TopRight(), appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint((rect.BottomLeft() + rect.BottomRight()) / 2,
appUnitsPerDevPixel));
} else {
bool isLR = isVertical ? wm.IsVerticalLR() : wm.IsBidiLTR();
if (isLR) {
// to right
builder->MoveTo(NSPointToPoint(rect.TopLeft(), appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint((rect.TopRight() + rect.BottomRight()) / 2,
appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint(rect.BottomLeft(), appUnitsPerDevPixel));
} else {
// to left
builder->MoveTo(NSPointToPoint(rect.TopRight(), appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint(rect.BottomRight(), appUnitsPerDevPixel));
builder->LineTo(NSPointToPoint((rect.TopLeft() + rect.BottomLeft()) / 2,
appUnitsPerDevPixel));
}
}
RefPtr<Path> path = builder->Finish();
BulletRenderer br(path, color, listStyleType->GetStyle());
return Some(br);
}
default:
{
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetFontMetricsForFrame(this, GetFontSizeInflation());
nsAutoString text;
GetListItemText(text);
WritingMode wm = GetWritingMode();
nscoord ascent = wm.IsLineInverted()
? fm->MaxDescent() : fm->MaxAscent();
aPt.MoveBy(padding.left, padding.top);
if (wm.IsVertical()) {
if (wm.IsVerticalLR()) {
aPt.x = NSToCoordRound(nsLayoutUtils::GetSnappedBaselineX(
this, &aRenderingContext, aPt.x, ascent));
} else {
aPt.x = NSToCoordRound(nsLayoutUtils::GetSnappedBaselineX(
this, &aRenderingContext, aPt.x + mRect.width,
-ascent));
}
} else {
aPt.y = NSToCoordRound(nsLayoutUtils::GetSnappedBaselineY(
this, &aRenderingContext, aPt.y, ascent));
}
BulletRenderer br(text, fm, color, aPt, listStyleType->GetStyle());
return Some(br);
}
}
MOZ_CRASH("unreachable");
return Nothing();
}
ImgDrawResult
nsBulletFrame::PaintBullet(gfxContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect, uint32_t aFlags,
bool aDisableSubpixelAA)
{
Maybe<BulletRenderer> br = CreateBulletRenderer(aRenderingContext, aPt);
if (!br) {
return ImgDrawResult::SUCCESS;
}
return br->Paint(aRenderingContext, aPt, aDirtyRect,
aFlags, aDisableSubpixelAA, this);
}
int32_t
nsBulletFrame::SetListItemOrdinal(int32_t aNextOrdinal,
bool* aChanged,
int32_t aIncrement)
{
MOZ_ASSERT(aIncrement == 1 || aIncrement == -1,
"We shouldn't have weird increments here");
// Assume that the ordinal comes from the caller
int32_t oldOrdinal = mOrdinal;
mOrdinal = aNextOrdinal;
// Try to get value directly from the list-item, if it specifies a
// value attribute. Note: we do this with our parent's content
// because our parent is the list-item.
nsIContent* parentContent = GetParent()->GetContent();
if (parentContent) {
nsGenericHTMLElement *hc =
nsGenericHTMLElement::FromContent(parentContent);
if (hc) {
const nsAttrValue* attr = hc->GetParsedAttr(nsGkAtoms::value);
if (attr && attr->Type() == nsAttrValue::eInteger) {
// Use ordinal specified by the value attribute
mOrdinal = attr->GetIntegerValue();
}
}
}
*aChanged = oldOrdinal != mOrdinal;
return nsCounterManager::IncrementCounter(mOrdinal, aIncrement);
}
void
nsBulletFrame::GetListItemText(nsAString& aResult)
{
CounterStyle* style = StyleList()->mCounterStyle;
NS_ASSERTION(style->GetStyle() != NS_STYLE_LIST_STYLE_NONE &&
style->GetStyle() != NS_STYLE_LIST_STYLE_DISC &&
style->GetStyle() != NS_STYLE_LIST_STYLE_CIRCLE &&
style->GetStyle() != NS_STYLE_LIST_STYLE_SQUARE &&
style->GetStyle() != NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED &&
style->GetStyle() != NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN,
"we should be using specialized code for these types");
bool isRTL;
nsAutoString counter, prefix, suffix;
style->GetPrefix(prefix);
style->GetSuffix(suffix);
style->GetCounterText(mOrdinal, GetWritingMode(), counter, isRTL);
aResult.Truncate();
aResult.Append(prefix);
if (GetWritingMode().IsBidiLTR() != isRTL) {
aResult.Append(counter);
} else {
// RLM = 0x200f, LRM = 0x200e
char16_t mark = isRTL ? 0x200f : 0x200e;
aResult.Append(mark);
aResult.Append(counter);
aResult.Append(mark);
}
aResult.Append(suffix);
}
#define MIN_BULLET_SIZE 1
void
nsBulletFrame::AppendSpacingToPadding(nsFontMetrics* aFontMetrics,
LogicalMargin* aPadding)
{
aPadding->IEnd(GetWritingMode()) += aFontMetrics->EmHeight() / 2;
}
void
nsBulletFrame::GetDesiredSize(nsPresContext* aCX,
gfxContext *aRenderingContext,
ReflowOutput& aMetrics,
float aFontSizeInflation,
LogicalMargin* aPadding)
{
// Reset our padding. If we need it, we'll set it below.
WritingMode wm = GetWritingMode();
aPadding->SizeTo(wm, 0, 0, 0, 0);
LogicalSize finalSize(wm);
const nsStyleList* myList = StyleList();
nscoord ascent;
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetFontMetricsForFrame(this, aFontSizeInflation);
RemoveStateBits(BULLET_FRAME_IMAGE_LOADING);
if (myList->GetListStyleImage() && mImageRequest) {
uint32_t status;
mImageRequest->GetImageStatus(&status);
if (status & imgIRequest::STATUS_SIZE_AVAILABLE &&
!(status & imgIRequest::STATUS_ERROR)) {
// auto size the image
finalSize.ISize(wm) = mIntrinsicSize.ISize(wm);
aMetrics.SetBlockStartAscent(finalSize.BSize(wm) =
mIntrinsicSize.BSize(wm));
aMetrics.SetSize(wm, finalSize);
AppendSpacingToPadding(fm, aPadding);
AddStateBits(BULLET_FRAME_IMAGE_LOADING);
return;
}
}
// If we're getting our desired size and don't have an image, reset
// mIntrinsicSize to (0,0). Otherwise, if we used to have an image, it
// changed, and the new one is coming in, but we're reflowing before it's
// fully there, we'll end up with mIntrinsicSize not matching our size, but
// won't trigger a reflow in OnStartContainer (because mIntrinsicSize will
// match the image size).
mIntrinsicSize.SizeTo(wm, 0, 0);
nscoord bulletSize;
nsAutoString text;
switch (myList->mCounterStyle->GetStyle()) {
case NS_STYLE_LIST_STYLE_NONE:
finalSize.ISize(wm) = finalSize.BSize(wm) = 0;
aMetrics.SetBlockStartAscent(0);
break;
case NS_STYLE_LIST_STYLE_DISC:
case NS_STYLE_LIST_STYLE_CIRCLE:
case NS_STYLE_LIST_STYLE_SQUARE: {
ascent = fm->MaxAscent();
bulletSize = std::max(nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
NSToCoordRound(0.8f * (float(ascent) / 2.0f)));
aPadding->BEnd(wm) = NSToCoordRound(float(ascent) / 8.0f);
finalSize.ISize(wm) = finalSize.BSize(wm) = bulletSize;
aMetrics.SetBlockStartAscent(bulletSize + aPadding->BEnd(wm));
AppendSpacingToPadding(fm, aPadding);
break;
}
case NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED:
case NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN:
ascent = fm->EmAscent();
bulletSize = std::max(
nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
NSToCoordRound(0.75f * ascent));
aPadding->BEnd(wm) = NSToCoordRound(0.125f * ascent);
finalSize.ISize(wm) = finalSize.BSize(wm) = bulletSize;
if (!wm.IsVertical()) {
aMetrics.SetBlockStartAscent(bulletSize + aPadding->BEnd(wm));
}
AppendSpacingToPadding(fm, aPadding);
break;
default:
GetListItemText(text);
finalSize.BSize(wm) = fm->MaxHeight();
finalSize.ISize(wm) =
nsLayoutUtils::AppUnitWidthOfStringBidi(text, this, *fm, *aRenderingContext);
aMetrics.SetBlockStartAscent(wm.IsLineInverted()
? fm->MaxDescent() : fm->MaxAscent());
break;
}
aMetrics.SetSize(wm, finalSize);
}
void
nsBulletFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aMetrics,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsBulletFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "The reflow status should be empty!");
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
SetFontSizeInflation(inflation);
// Get the base size
GetDesiredSize(aPresContext, aReflowInput.mRenderingContext, aMetrics, inflation,
&mPadding);
// Add in the border and padding; split the top/bottom between the
// ascent and descent to make things look nice
WritingMode wm = aReflowInput.GetWritingMode();
const LogicalMargin& bp = aReflowInput.ComputedLogicalBorderPadding();
mPadding.BStart(wm) += NSToCoordRound(bp.BStart(wm) * inflation);
mPadding.IEnd(wm) += NSToCoordRound(bp.IEnd(wm) * inflation);
mPadding.BEnd(wm) += NSToCoordRound(bp.BEnd(wm) * inflation);
mPadding.IStart(wm) += NSToCoordRound(bp.IStart(wm) * inflation);
WritingMode lineWM = aMetrics.GetWritingMode();
LogicalMargin linePadding = mPadding.ConvertTo(lineWM, wm);
aMetrics.ISize(lineWM) += linePadding.IStartEnd(lineWM);
aMetrics.BSize(lineWM) += linePadding.BStartEnd(lineWM);
aMetrics.SetBlockStartAscent(aMetrics.BlockStartAscent() +
linePadding.BStart(lineWM));
// XXX this is a bit of a hack, we're assuming that no glyphs used for bullets
// overflow their font-boxes. It'll do for now; to fix it for real, we really
// should rewrite all the text-handling code here to use gfxTextRun (bug
// 397294).
aMetrics.SetOverflowAreasToDesiredBounds();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
}
/* virtual */ nscoord
nsBulletFrame::GetMinISize(gfxContext *aRenderingContext)
{
WritingMode wm = GetWritingMode();
ReflowOutput reflowOutput(wm);
DISPLAY_MIN_WIDTH(this, reflowOutput.ISize(wm));
LogicalMargin padding(wm);
GetDesiredSize(PresContext(), aRenderingContext, reflowOutput, 1.0f, &padding);
reflowOutput.ISize(wm) += padding.IStartEnd(wm);
return reflowOutput.ISize(wm);
}
/* virtual */ nscoord
nsBulletFrame::GetPrefISize(gfxContext *aRenderingContext)
{
WritingMode wm = GetWritingMode();
ReflowOutput metrics(wm);
DISPLAY_PREF_WIDTH(this, metrics.ISize(wm));
LogicalMargin padding(wm);
GetDesiredSize(PresContext(), aRenderingContext, metrics, 1.0f, &padding);
metrics.ISize(wm) += padding.IStartEnd(wm);
return metrics.ISize(wm);
}
// If a bullet has zero size and is "ignorable" from its styling, we behave
// as if it doesn't exist, from a line-breaking/isize-computation perspective.
// Otherwise, we use the default implementation, same as nsFrame.
static inline bool
IsIgnoreable(const nsIFrame* aFrame, nscoord aISize)
{
if (aISize != nscoord(0)) {
return false;
}
auto listStyle = aFrame->StyleList();
return listStyle->mCounterStyle->IsNone() &&
!listStyle->GetListStyleImage();
}
/* virtual */ void
nsBulletFrame::AddInlineMinISize(gfxContext* aRenderingContext,
nsIFrame::InlineMinISizeData* aData)
{
nscoord isize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
this, nsLayoutUtils::MIN_ISIZE);
if (MOZ_LIKELY(!::IsIgnoreable(this, isize))) {
aData->DefaultAddInlineMinISize(this, isize);
}
}
/* virtual */ void
nsBulletFrame::AddInlinePrefISize(gfxContext* aRenderingContext,
nsIFrame::InlinePrefISizeData* aData)
{
nscoord isize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
this, nsLayoutUtils::PREF_ISIZE);
if (MOZ_LIKELY(!::IsIgnoreable(this, isize))) {
aData->DefaultAddInlinePrefISize(isize);
}
}
NS_IMETHODIMP
nsBulletFrame::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
{
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
return OnSizeAvailable(aRequest, image);
}
if (aType == imgINotificationObserver::FRAME_UPDATE) {
// The image has changed.
// Invalidate the entire content area. Maybe it's not optimal but it's simple and
// always correct, and I'll be a stunned mullet if it ever matters for performance
InvalidateFrame();
}
if (aType == imgINotificationObserver::IS_ANIMATED) {
// Register the image request with the refresh driver now that we know it's
// animated.
if (aRequest == mImageRequest) {
RegisterImageRequest(/* aKnownToBeAnimated = */ true);
}
}
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
// Unconditionally start decoding for now.
// XXX(seth): We eventually want to decide whether to do this based on
// visibility. We should get that for free from bug 1091236.
nsCOMPtr<imgIContainer> container;
aRequest->GetImage(getter_AddRefs(container));
if (container) {
// Retrieve the intrinsic size of the image.
int32_t width = 0;
int32_t height = 0;
container->GetWidth(&width);
container->GetHeight(&height);
// Request a decode at that size.
container->RequestDecodeForSize(IntSize(width, height),
imgIContainer::DECODE_FLAGS_DEFAULT);
}
InvalidateFrame();
}
if (aType == imgINotificationObserver::DECODE_COMPLETE) {
if (nsIDocument* parent = GetOurCurrentDoc()) {
nsCOMPtr<imgIContainer> container;
aRequest->GetImage(getter_AddRefs(container));
if (container) {
container->PropagateUseCounters(parent);
}
}
}
return NS_OK;
}
nsIDocument*
nsBulletFrame::GetOurCurrentDoc() const
{
nsIContent* parentContent = GetParent()->GetContent();
return parentContent ? parentContent->GetComposedDoc()
: nullptr;
}
nsresult
nsBulletFrame::OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage)
{
if (!aImage) return NS_ERROR_INVALID_ARG;
if (!aRequest) return NS_ERROR_INVALID_ARG;
uint32_t status;
aRequest->GetImageStatus(&status);
if (status & imgIRequest::STATUS_ERROR) {
return NS_OK;
}
nscoord w, h;
aImage->GetWidth(&w);
aImage->GetHeight(&h);
nsPresContext* presContext = PresContext();
LogicalSize newsize(GetWritingMode(),
nsSize(nsPresContext::CSSPixelsToAppUnits(w),
nsPresContext::CSSPixelsToAppUnits(h)));
if (mIntrinsicSize != newsize) {
mIntrinsicSize = newsize;
// Now that the size is available (or an error occurred), trigger
// a reflow of the bullet frame.
nsIPresShell *shell = presContext->GetPresShell();
if (shell) {
shell->FrameNeedsReflow(this, nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
}
}
// Handle animations
aImage->SetAnimationMode(presContext->ImageAnimationMode());
// Ensure the animation (if any) is started. Note: There is no
// corresponding call to Decrement for this. This Increment will be
// 'cleaned up' by the Request when it is destroyed, but only then.
aRequest->IncrementAnimationConsumers();
return NS_OK;
}
void
nsBulletFrame::GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup)
{
if (!aPresContext)
return;
NS_PRECONDITION(nullptr != aLoadGroup, "null OUT parameter pointer");
nsIPresShell *shell = aPresContext->GetPresShell();
if (!shell)
return;
nsIDocument *doc = shell->GetDocument();
if (!doc)
return;
*aLoadGroup = doc->GetDocumentLoadGroup().take();
}
float
nsBulletFrame::GetFontSizeInflation() const
{
if (!HasFontSizeInflation()) {
return 1.0f;
}
return GetProperty(FontSizeInflationProperty());
}
void
nsBulletFrame::SetFontSizeInflation(float aInflation)
{
if (aInflation == 1.0f) {
if (HasFontSizeInflation()) {
RemoveStateBits(BULLET_FRAME_HAS_FONT_INFLATION);
DeleteProperty(FontSizeInflationProperty());
}
return;
}
AddStateBits(BULLET_FRAME_HAS_FONT_INFLATION);
SetProperty(FontSizeInflationProperty(), aInflation);
}
already_AddRefed<imgIContainer>
nsBulletFrame::GetImage() const
{
if (mImageRequest && StyleList()->GetListStyleImage()) {
nsCOMPtr<imgIContainer> imageCon;
mImageRequest->GetImage(getter_AddRefs(imageCon));
return imageCon.forget();
}
return nullptr;
}
nscoord
nsBulletFrame::GetLogicalBaseline(WritingMode aWritingMode) const
{
nscoord ascent = 0, baselinePadding;
if (GetStateBits() & BULLET_FRAME_IMAGE_LOADING) {
ascent = BSize(aWritingMode);
} else {
RefPtr<nsFontMetrics> fm =
nsLayoutUtils::GetFontMetricsForFrame(this, GetFontSizeInflation());
CounterStyle* listStyleType = StyleList()->mCounterStyle;
switch (listStyleType->GetStyle()) {
case NS_STYLE_LIST_STYLE_NONE:
break;
case NS_STYLE_LIST_STYLE_DISC:
case NS_STYLE_LIST_STYLE_CIRCLE:
case NS_STYLE_LIST_STYLE_SQUARE:
ascent = fm->MaxAscent();
baselinePadding = NSToCoordRound(float(ascent) / 8.0f);
ascent = std::max(nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
NSToCoordRound(0.8f * (float(ascent) / 2.0f)));
ascent += baselinePadding;
break;
case NS_STYLE_LIST_STYLE_DISCLOSURE_CLOSED:
case NS_STYLE_LIST_STYLE_DISCLOSURE_OPEN:
ascent = fm->EmAscent();
baselinePadding = NSToCoordRound(0.125f * ascent);
ascent = std::max(
nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
NSToCoordRound(0.75f * ascent));
ascent += baselinePadding;
break;
default:
ascent = fm->MaxAscent();
break;
}
}
return ascent +
GetLogicalUsedMargin(aWritingMode).BStart(aWritingMode);
}
void
nsBulletFrame::GetSpokenText(nsAString& aText)
{
CounterStyle* style = StyleList()->mCounterStyle;
bool isBullet;
style->GetSpokenCounterText(mOrdinal, GetWritingMode(), aText, isBullet);
if (isBullet) {
if (!style->IsNone()) {
aText.Append(' ');
}
} else {
nsAutoString prefix, suffix;
style->GetPrefix(prefix);
style->GetSuffix(suffix);
aText = prefix + aText + suffix;
}
}
void
nsBulletFrame::RegisterImageRequest(bool aKnownToBeAnimated)
{
if (mImageRequest) {
// mRequestRegistered is a bitfield; unpack it temporarily so we can take
// the address.
bool isRequestRegistered = mRequestRegistered;
if (aKnownToBeAnimated) {
nsLayoutUtils::RegisterImageRequest(PresContext(), mImageRequest,
&isRequestRegistered);
} else {
nsLayoutUtils::RegisterImageRequestIfAnimated(PresContext(),
mImageRequest,
&isRequestRegistered);
}
isRequestRegistered = mRequestRegistered;
}
}
void
nsBulletFrame::DeregisterAndCancelImageRequest()
{
if (mImageRequest) {
// mRequestRegistered is a bitfield; unpack it temporarily so we can take
// the address.
bool isRequestRegistered = mRequestRegistered;
// Deregister our image request from the refresh driver.
nsLayoutUtils::DeregisterImageRequest(PresContext(),
mImageRequest,
&isRequestRegistered);
isRequestRegistered = mRequestRegistered;
// Cancel the image request and forget about it.
mImageRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
mImageRequest = nullptr;
}
}
NS_IMPL_ISUPPORTS(nsBulletListener, imgINotificationObserver)
nsBulletListener::nsBulletListener() :
mFrame(nullptr)
{
}
nsBulletListener::~nsBulletListener()
{
}
NS_IMETHODIMP
nsBulletListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
{
if (!mFrame) {
return NS_ERROR_FAILURE;
}
return mFrame->Notify(aRequest, aType, aData);
}
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