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Diffstat (limited to '')
| -rw-r--r-- | layout/generic/nsBulletFrame.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/layout/generic/nsBulletFrame.h b/layout/generic/nsBulletFrame.h new file mode 100644 index 0000000000..4f9078948a --- /dev/null +++ b/layout/generic/nsBulletFrame.h @@ -0,0 +1,165 @@ +/* -*- 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 */ + +#ifndef nsBulletFrame_h___ +#define nsBulletFrame_h___ + +#include "mozilla/Attributes.h" +#include "nsIFrame.h" + +#include "imgIContainer.h" +#include "imgINotificationObserver.h" + +class imgIContainer; +class imgRequestProxy; + +class nsBulletFrame; +class BulletRenderer; + +class nsFontMetrics; + +class nsBulletListener final : public imgINotificationObserver { + public: + nsBulletListener(); + + NS_DECL_ISUPPORTS + NS_DECL_IMGINOTIFICATIONOBSERVER + + void SetFrame(nsBulletFrame* frame) { mFrame = frame; } + + private: + virtual ~nsBulletListener(); + + nsBulletFrame* mFrame; +}; + +/** + * A simple class that manages the layout and rendering of html bullets. + * This class also supports the CSS list-style properties. + */ +class nsBulletFrame final : public nsIFrame { + typedef mozilla::image::ImgDrawResult ImgDrawResult; + + public: + NS_DECL_FRAMEARENA_HELPERS(nsBulletFrame) +#ifdef DEBUG + NS_DECL_QUERYFRAME +#endif + + explicit nsBulletFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) + : nsIFrame(aStyle, aPresContext, kClassID), + mPadding(GetWritingMode()), + mIntrinsicSize(GetWritingMode()), + mRequestRegistered(false) {} + + virtual ~nsBulletFrame(); + + void Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData); + + // nsIFrame + virtual void DestroyFrom(nsIFrame* aDestructRoot, + PostDestroyData& aPostDestroyData) override; + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) override; + virtual void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override; +#ifdef DEBUG_FRAME_DUMP + virtual nsresult GetFrameName(nsAString& aResult) const override; +#endif + + virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) override; + virtual nscoord GetMinISize(gfxContext* aRenderingContext) override; + virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override; + void AddInlineMinISize(gfxContext* aRenderingContext, + nsIFrame::InlineMinISizeData* aData) override; + void AddInlinePrefISize(gfxContext* aRenderingContext, + nsIFrame::InlinePrefISizeData* aData) override; + + virtual bool IsFrameOfType(uint32_t aFlags) const override { + if (aFlags & (eSupportsCSSTransforms | eSupportsContainLayoutAndPaint)) { + return false; + } + return nsIFrame::IsFrameOfType(aFlags & ~nsIFrame::eLineParticipant); + } + + // nsBulletFrame + + /* get list item text, with prefix & suffix */ + static void GetListItemText(mozilla::CounterStyle*, mozilla::WritingMode, + int32_t aOrdinal, nsAString& aResult); + +#ifdef ACCESSIBILITY + void GetSpokenText(nsAString& aText); +#endif + + Maybe<BulletRenderer> CreateBulletRenderer(gfxContext& aRenderingContext, + nsPoint aPt); + ImgDrawResult PaintBullet(gfxContext& aRenderingContext, nsPoint aPt, + const nsRect& aDirtyRect, uint32_t aFlags, + bool aDisableSubpixelAA); + + virtual bool IsEmpty() override; + virtual bool IsSelfEmpty() override; + + // XXXmats note that this method returns a non-standard baseline that includes + // the ::marker block-start margin. New code should probably use + // GetNaturalBaselineBOffset instead, which returns a normal baseline offset + // as documented in nsIFrame.h. + virtual nscoord GetLogicalBaseline( + mozilla::WritingMode aWritingMode) const override; + + bool GetNaturalBaselineBOffset(mozilla::WritingMode aWM, + BaselineSharingGroup aBaselineGroup, + nscoord* aBaseline) const override; + + float GetFontSizeInflation() const; + bool HasFontSizeInflation() const { + return HasAnyStateBits(BULLET_FRAME_HAS_FONT_INFLATION); + } + void SetFontSizeInflation(float aInflation); + + int32_t Ordinal() const { return mOrdinal; } + void SetOrdinal(int32_t aOrdinal, bool aNotify); + + already_AddRefed<imgIContainer> GetImage() const; + + protected: + void OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage); + + void AppendSpacingToPadding(nsFontMetrics* aFontMetrics, + mozilla::LogicalMargin* aPadding); + void GetDesiredSize(nsPresContext* aPresContext, + gfxContext* aRenderingContext, ReflowOutput& aMetrics, + float aFontSizeInflation, + mozilla::LogicalMargin* aPadding); + + void GetLoadGroup(nsPresContext* aPresContext, nsILoadGroup** aLoadGroup); + mozilla::dom::Document* GetOurCurrentDoc() const; + + mozilla::LogicalMargin mPadding; + RefPtr<imgRequestProxy> mImageRequest; + RefPtr<nsBulletListener> mListener; + + mozilla::LogicalSize mIntrinsicSize; + + private: + mozilla::CounterStyle* ResolveCounterStyle(); + nscoord GetListStyleAscent() const; + void RegisterImageRequest(bool aKnownToBeAnimated); + void DeregisterAndCancelImageRequest(); + + // Requires being set via SetOrdinal. + int32_t mOrdinal = 0; + + // This is a boolean flag indicating whether or not the current image request + // has been registered with the refresh driver. + bool mRequestRegistered : 1; +}; + +#endif /* nsBulletFrame_h___ */ |