gecko-dev/layout/generic/nsBulletFrame.h

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4.5 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsFrame.h"
#include "imgINotificationObserver.h"
class imgIContainer;
class imgRequestProxy;
class nsBulletFrame;
class nsBulletListener : public imgINotificationObserver
{
public:
nsBulletListener();
virtual ~nsBulletListener();
NS_DECL_ISUPPORTS
NS_DECL_IMGINOTIFICATIONOBSERVER
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
#ifdef DEBUG
NS_DECL_QUERYFRAME_TARGET(nsBulletFrame)
NS_DECL_QUERYFRAME
#endif
nsBulletFrame(nsStyleContext* aContext)
: nsFrame(aContext)
{
}
virtual ~nsBulletFrame();
NS_IMETHOD Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData);
// nsIFrame
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif
// nsIHTMLReflow
virtual nsresult Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
// nsBulletFrame
int32_t SetListItemOrdinal(int32_t aNextOrdinal, bool* aChanged,
int32_t aIncrement);
/* get list item text, without '.' */
static void AppendCounterText(int32_t aListStyleType,
int32_t aOrdinal,
nsString& aResult,
bool& aIsRTL);
/* get suffix of list item */
static void GetListItemSuffix(int32_t aListStyleType,
nsString& aResult,
bool& aSuppressPadding);
/* get list item text, with '.' */
void GetListItemText(const nsStyleList& aStyleList, nsString& aResult);
void PaintBullet(nsRenderingContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect, uint32_t aFlags);
virtual bool IsEmpty() MOZ_OVERRIDE;
virtual bool IsSelfEmpty() MOZ_OVERRIDE;
virtual nscoord GetBaseline() const MOZ_OVERRIDE;
float GetFontSizeInflation() const;
bool HasFontSizeInflation() const {
return (GetStateBits() & BULLET_FRAME_HAS_FONT_INFLATION) != 0;
}
void SetFontSizeInflation(float aInflation);
int32_t GetOrdinal() { return mOrdinal; }
already_AddRefed<imgIContainer> GetImage() const;
protected:
nsresult OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
void GetDesiredSize(nsPresContext* aPresContext,
nsRenderingContext *aRenderingContext,
nsHTMLReflowMetrics& aMetrics,
float aFontSizeInflation);
void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
nsMargin mPadding;
nsRefPtr<imgRequestProxy> mImageRequest;
nsRefPtr<nsBulletListener> mListener;
nsSize mIntrinsicSize;
int32_t mOrdinal;
bool mTextIsRTL;
// If set to true, any padding of bullet defined in the UA style sheet will
// be suppressed. This is used for some CJK numbering styles where extra
// space after the suffix is not desired. Note that, any author-specified
// padding overriding the default style will NOT be suppressed.
bool mSuppressPadding;
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___ */