gecko/layout/generic/nsBulletFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* 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 "nsFrame.h"
#include "nsStyleContext.h"
#include "imgIRequest.h"
#include "imgIDecoderObserver.h"
#include "nsStubImageDecoderObserver.h"
#define BULLET_FRAME_IMAGE_LOADING NS_FRAME_STATE_BIT(63)
#define BULLET_FRAME_HAS_FONT_INFLATION NS_FRAME_STATE_BIT(62)
class nsBulletFrame;
class nsBulletListener : public nsStubImageDecoderObserver
{
public:
nsBulletListener();
virtual ~nsBulletListener();
NS_DECL_ISUPPORTS
// imgIDecoderObserver (override nsStubImageDecoderObserver)
NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
NS_IMETHOD OnDataAvailable(imgIRequest *aRequest, bool aCurrentFrame,
const nsIntRect *aRect);
NS_IMETHOD OnStopDecode(imgIRequest *aRequest, nsresult status,
const PRUnichar *statusArg);
NS_IMETHOD OnImageIsAnimated(imgIRequest *aRequest);
// imgIContainerObserver (override nsStubImageDecoderObserver)
NS_IMETHOD FrameChanged(imgIRequest *aRequest,
imgIContainer *aContainer,
const nsIntRect *dirtyRect);
void SetFrame(nsBulletFrame *frame) { mFrame = frame; }
private:
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 : public nsFrame {
public:
NS_DECL_FRAMEARENA_HELPERS
nsBulletFrame(nsStyleContext* aContext)
: nsFrame(aContext)
{
}
virtual ~nsBulletFrame();
// nsIFrame
virtual void DestroyFrom(nsIFrame* aDestructRoot);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
virtual nsIAtom* GetType() const;
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
// nsIHTMLReflow
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
// nsBulletFrame
PRInt32 SetListItemOrdinal(PRInt32 aNextOrdinal, bool* aChanged);
NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
NS_IMETHOD OnDataAvailable(imgIRequest *aRequest,
bool aCurrentFrame,
const nsIntRect *aRect);
NS_IMETHOD OnStopDecode(imgIRequest *aRequest,
nsresult aStatus,
const PRUnichar *aStatusArg);
NS_IMETHOD OnImageIsAnimated(imgIRequest *aRequest);
NS_IMETHOD FrameChanged(imgIRequest *aRequest,
imgIContainer *aContainer,
const nsIntRect *aDirtyRect);
/* get list item text, without '.' */
static bool AppendCounterText(PRInt32 aListStyleType,
PRInt32 aOrdinal,
nsString& aResult);
/* get list item text, with '.' */
bool GetListItemText(const nsStyleList& aStyleList,
nsString& aResult);
void PaintBullet(nsRenderingContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect);
virtual bool IsEmpty();
virtual bool IsSelfEmpty();
virtual nscoord GetBaseline() const;
float GetFontSizeInflation() const;
bool HasFontSizeInflation() const {
return (GetStateBits() & BULLET_FRAME_HAS_FONT_INFLATION) != 0;
}
void SetFontSizeInflation(float aInflation);
protected:
void GetDesiredSize(nsPresContext* aPresContext,
nsRenderingContext *aRenderingContext,
nsHTMLReflowMetrics& aMetrics,
float aFontSizeInflation);
void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
nsMargin mPadding;
nsCOMPtr<imgIRequest> mImageRequest;
nsRefPtr<nsBulletListener> mListener;
nsSize mIntrinsicSize;
PRInt32 mOrdinal;
bool mTextIsRTL;
private:
// This is a boolean flag indicating whether or not the current image request
// has been registered with the refresh driver.
bool mRequestRegistered;
};
#endif /* nsBulletFrame_h___ */