gecko-dev/layout/generic/nsAreaFrame.h

142 строки
4.6 KiB
C
Исходник Обычный вид История

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsAreaFrame_h___
#define nsAreaFrame_h___
#include "nsBlockFrame.h"
#include "nsISpaceManager.h"
#include "nsVoidArray.h"
#include "nsIAreaFrame.h"
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class nsSpaceManager;
struct nsStyleDisplay;
struct nsStylePosition;
/**
* Child list name indices
* @see #GetAdditionalChildListName()
*/
#define NS_AREA_FRAME_ABSOLUTE_LIST_INDEX (NS_BLOCK_FRAME_LAST_LIST_INDEX + 1)
/**
* The area frame has an additional named child list:
* - "Absolute-list" which contains the absolutely positioned frames
*
* @see nsLayoutAtoms::absoluteList
*/
class nsAreaFrame : public nsBlockFrame, public nsIAreaFrame
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{
public:
friend nsresult NS_NewAreaFrame(nsIFrame*& aResult, PRUint32 aFlags);
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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// nsIFrame
NS_IMETHOD Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext);
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NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
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NS_IMETHOD GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const;
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NS_IMETHOD FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const;
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NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
#ifdef NS_DEBUG
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
#endif
NS_IMETHOD DidReflow(nsIPresContext& aPresContext,
nsDidReflowStatus aStatus);
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NS_IMETHOD CreateContinuingFrame(nsIPresContext& aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame);
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::areaFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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NS_IMETHOD GetFrameName(nsString& aResult) const;
// nsIAreaFrame
NS_IMETHOD GetPositionedInfo(nscoord& aXMost, nscoord& aYMost) const;
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protected:
nsAreaFrame();
virtual ~nsAreaFrame();
nsresult IncrementalReflow(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState);
nsresult ReflowAbsoluteFrame(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsIFrame* aKidFrame,
PRBool aInitialReflow,
nsReflowStatus& aStatus);
void ReflowAbsoluteFrames(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState);
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private:
nsSpaceManager* mSpaceManager;
nsFrameList mAbsoluteFrames; // additional named child list
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#ifdef NS_DEBUG
struct BandData : public nsBandData {
// Trapezoids used during band processing
nsBandTrapezoid data[12];
// Bounding rect of available space between any left and right floaters
nsRect availSpace;
BandData() {
size = 12;
trapezoids = data;
}
/**
* Computes the bounding rect of the available space, i.e. space
* between any left and right floaters Uses the current trapezoid
* data, see nsISpaceManager::GetBandData(). Also updates member
* data "availSpace".
*/
void ComputeAvailSpaceRect();
};
#endif
};
#endif /* nsAreaFrame_h___ */