зеркало из https://github.com/mozilla/gecko-dev.git
130 строки
3.9 KiB
C++
130 строки
3.9 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 "nsStyleContext.h"
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#include "imgIRequest.h"
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#include "imgINotificationObserver.h"
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class imgRequestProxy;
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#define BULLET_FRAME_IMAGE_LOADING NS_FRAME_STATE_BIT(63)
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#define BULLET_FRAME_HAS_FONT_INFLATION NS_FRAME_STATE_BIT(62)
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class nsBulletFrame;
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class nsBulletListener : public imgINotificationObserver
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{
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public:
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nsBulletListener();
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virtual ~nsBulletListener();
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NS_DECL_ISUPPORTS
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NS_DECL_IMGINOTIFICATIONOBSERVER
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void SetFrame(nsBulletFrame *frame) { mFrame = frame; }
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private:
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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 : public nsFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS
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nsBulletFrame(nsStyleContext* aContext)
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: nsFrame(aContext)
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{
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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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// nsIFrame
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) MOZ_OVERRIDE;
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virtual nsIAtom* GetType() const MOZ_OVERRIDE;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
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#endif
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// nsIHTMLReflow
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) MOZ_OVERRIDE;
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_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, without '.' */
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static bool AppendCounterText(int32_t aListStyleType,
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int32_t aOrdinal,
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nsString& aResult);
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/* get list item text, with '.' */
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bool GetListItemText(const nsStyleList& aStyleList,
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nsString& aResult);
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void PaintBullet(nsRenderingContext& aRenderingContext, nsPoint aPt,
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const nsRect& aDirtyRect);
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virtual bool IsEmpty() MOZ_OVERRIDE;
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virtual bool IsSelfEmpty() MOZ_OVERRIDE;
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virtual nscoord GetBaseline() const MOZ_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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protected:
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nsresult OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
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void GetDesiredSize(nsPresContext* aPresContext,
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nsRenderingContext *aRenderingContext,
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nsHTMLReflowMetrics& aMetrics,
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float aFontSizeInflation);
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void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
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nsMargin mPadding;
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nsRefPtr<imgRequestProxy> mImageRequest;
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nsRefPtr<nsBulletListener> mListener;
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nsSize mIntrinsicSize;
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int32_t mOrdinal;
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bool mTextIsRTL;
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private:
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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;
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};
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#endif /* nsBulletFrame_h___ */
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