зеркало из https://github.com/mozilla/gecko-dev.git
153 строки
4.8 KiB
C++
153 строки
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering object for list-item bullets */
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#ifndef nsBulletFrame_h___
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#define nsBulletFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsFrame.h"
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#include "imgIContainer.h"
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#include "imgINotificationObserver.h"
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#include "imgIOnloadBlocker.h"
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class imgIContainer;
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class imgRequestProxy;
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class nsBulletFrame;
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class BulletRenderer;
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class nsBulletListener final : public imgINotificationObserver,
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public imgIOnloadBlocker
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{
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public:
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nsBulletListener();
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NS_DECL_ISUPPORTS
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NS_DECL_IMGINOTIFICATIONOBSERVER
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NS_DECL_IMGIONLOADBLOCKER
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void SetFrame(nsBulletFrame *frame) { mFrame = frame; }
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private:
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virtual ~nsBulletListener();
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nsBulletFrame *mFrame;
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};
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/**
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* A simple class that manages the layout and rendering of html bullets.
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* This class also supports the CSS list-style properties.
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*/
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class nsBulletFrame final : public nsFrame {
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typedef mozilla::image::DrawResult DrawResult;
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsBulletFrame)
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#ifdef DEBUG
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NS_DECL_QUERYFRAME
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#endif
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explicit nsBulletFrame(nsStyleContext* aContext)
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: nsFrame(aContext, kClassID)
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, mPadding(GetWritingMode())
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, mIntrinsicSize(GetWritingMode())
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, mOrdinal(0)
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, mRequestRegistered(false)
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, mBlockingOnload(false)
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{}
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virtual ~nsBulletFrame();
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NS_IMETHOD Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData);
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NS_IMETHOD BlockOnload(imgIRequest* aRequest);
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NS_IMETHOD UnblockOnload(imgIRequest* aRequest);
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// nsIFrame
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aMetrics,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual nscoord GetMinISize(gfxContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext *aRenderingContext) override;
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void AddInlineMinISize(gfxContext* aRenderingContext,
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nsIFrame::InlineMinISizeData* aData) override;
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void AddInlinePrefISize(gfxContext* aRenderingContext,
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nsIFrame::InlinePrefISizeData* aData) override;
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// nsBulletFrame
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int32_t SetListItemOrdinal(int32_t aNextOrdinal, bool* aChanged,
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int32_t aIncrement);
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/* get list item text, with prefix & suffix */
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void GetListItemText(nsAString& aResult);
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void GetSpokenText(nsAString& aText);
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Maybe<BulletRenderer>
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CreateBulletRenderer(gfxContext& aRenderingContext, nsPoint aPt);
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DrawResult PaintBullet(gfxContext& aRenderingContext, nsPoint aPt,
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const nsRect& aDirtyRect, uint32_t aFlags,
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bool aDisableSubpixelAA);
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virtual bool IsEmpty() override;
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virtual bool IsSelfEmpty() override;
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virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const override;
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float GetFontSizeInflation() const;
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bool HasFontSizeInflation() const {
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return (GetStateBits() & BULLET_FRAME_HAS_FONT_INFLATION) != 0;
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}
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void SetFontSizeInflation(float aInflation);
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int32_t GetOrdinal() { return mOrdinal; }
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already_AddRefed<imgIContainer> GetImage() const;
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protected:
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nsresult OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
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void AppendSpacingToPadding(nsFontMetrics* aFontMetrics,
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mozilla::LogicalMargin* aPadding);
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void GetDesiredSize(nsPresContext* aPresContext,
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gfxContext *aRenderingContext,
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ReflowOutput& aMetrics,
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float aFontSizeInflation,
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mozilla::LogicalMargin* aPadding);
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void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
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nsIDocument* GetOurCurrentDoc() const;
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mozilla::LogicalMargin mPadding;
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RefPtr<imgRequestProxy> mImageRequest;
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RefPtr<nsBulletListener> mListener;
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mozilla::LogicalSize mIntrinsicSize;
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int32_t mOrdinal;
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private:
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void RegisterImageRequest(bool aKnownToBeAnimated);
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void DeregisterAndCancelImageRequest();
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// This is a boolean flag indicating whether or not the current image request
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// has been registered with the refresh driver.
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bool mRequestRegistered : 1;
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// Whether we're currently blocking onload.
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bool mBlockingOnload : 1;
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};
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#endif /* nsBulletFrame_h___ */
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