зеркало из https://github.com/mozilla/pjs.git
407 строки
10 KiB
C++
407 строки
10 KiB
C++
/* -*- 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 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is Mozilla Communicator client code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape Communications
|
|
* Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
#ifndef nsLineBox_h___
|
|
#define nsLineBox_h___
|
|
|
|
#include "nsVoidArray.h"
|
|
#include "nsPlaceholderFrame.h"
|
|
#include "nsILineIterator.h"
|
|
#include "nsISizeOfHandler.h"
|
|
|
|
class nsISpaceManager;
|
|
class nsLineBox;
|
|
class nsFloaterCache;
|
|
class nsFloaterCacheList;
|
|
class nsFloaterCacheFreeList;
|
|
|
|
// State cached after reflowing a floater. This state is used during
|
|
// incremental reflow when we avoid reflowing a floater.
|
|
class nsFloaterCache {
|
|
public:
|
|
nsFloaterCache();
|
|
#ifdef DEBUG
|
|
~nsFloaterCache();
|
|
#else
|
|
~nsFloaterCache() { }
|
|
#endif
|
|
|
|
nsFloaterCache* Next() const { return mNext; }
|
|
|
|
nsPlaceholderFrame* mPlaceholder; // nsPlaceholderFrame
|
|
|
|
// This will be true if the floater was placed on the current line
|
|
// instead of below the current line.
|
|
PRBool mIsCurrentLineFloater;
|
|
|
|
nsMargin mMargins; // computed margins
|
|
|
|
nsMargin mOffsets; // computed offsets (relative pos)
|
|
|
|
// Region in the spacemanager impacted by this floater; the
|
|
// coordinates are relative to the containing block frame. The
|
|
// region includes the margins around the floater, but doesn't
|
|
// include the relative offsets.
|
|
nsRect mRegion;
|
|
|
|
// Combined area for the floater. This will not include the margins
|
|
// for the floater. Like mRegion, the coordinates are relative to
|
|
// the containing block frame.
|
|
nsRect mCombinedArea;
|
|
|
|
protected:
|
|
nsFloaterCache* mNext;
|
|
|
|
friend class nsFloaterCacheList;
|
|
friend class nsFloaterCacheFreeList;
|
|
};
|
|
|
|
//----------------------------------------
|
|
|
|
class nsFloaterCacheList {
|
|
public:
|
|
nsFloaterCacheList() : mHead(nsnull) { }
|
|
~nsFloaterCacheList();
|
|
|
|
PRBool IsEmpty() const {
|
|
return nsnull == mHead;
|
|
}
|
|
|
|
PRBool NotEmpty() const {
|
|
return nsnull != mHead;
|
|
}
|
|
|
|
nsFloaterCache* Head() const {
|
|
return mHead;
|
|
}
|
|
|
|
nsFloaterCache* Tail() const;
|
|
|
|
nsFloaterCache* Find(nsIFrame* aOutOfFlowFrame);
|
|
|
|
void Remove(nsFloaterCache* aElement);
|
|
|
|
void Append(nsFloaterCacheFreeList& aList);
|
|
|
|
#ifdef DEBUG
|
|
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
|
|
#endif
|
|
|
|
protected:
|
|
nsFloaterCache* mHead;
|
|
|
|
friend class nsFloaterCacheFreeList;
|
|
};
|
|
|
|
//---------------------------------------
|
|
|
|
class nsFloaterCacheFreeList : public nsFloaterCacheList {
|
|
public:
|
|
nsFloaterCacheFreeList() : mTail(nsnull) { }
|
|
~nsFloaterCacheFreeList() { }
|
|
|
|
// Steal away aList's nsFloaterCache objects and put them on this
|
|
// free-list.
|
|
void Append(nsFloaterCacheList& aList);
|
|
|
|
void Append(nsFloaterCache* aFloaterCache);
|
|
|
|
// Allocate a new nsFloaterCache object
|
|
nsFloaterCache* Alloc();
|
|
|
|
protected:
|
|
nsFloaterCache* mTail;
|
|
|
|
friend class nsFloaterCacheList;
|
|
};
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#define LINE_MAX_BREAK_TYPE ((1 << 4) - 1)
|
|
#define LINE_MAX_CHILD_COUNT ((1 << 24) - 1)
|
|
|
|
#if NS_STYLE_CLEAR_LAST_VALUE > 15
|
|
need to rearrange the mBits bitfield;
|
|
#endif
|
|
|
|
/**
|
|
* The nsLineBox class represents a horizontal line of frames. It contains
|
|
* enough state to support incremental reflow of the frames, event handling
|
|
* for the frames, and rendering of the frames.
|
|
*/
|
|
class nsLineBox {
|
|
public:
|
|
nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRBool aIsBlock);
|
|
~nsLineBox();
|
|
|
|
void Reset(nsIFrame* aFrame, PRInt32 aCount, PRBool aIsBlock);
|
|
|
|
// mBlock bit
|
|
PRBool IsBlock() const {
|
|
return mFlags.mBlock;
|
|
}
|
|
PRBool IsInline() const {
|
|
return 0 == mFlags.mBlock;
|
|
}
|
|
|
|
// mDirty bit
|
|
void MarkDirty() {
|
|
mFlags.mDirty = 1;
|
|
}
|
|
void ClearDirty() {
|
|
mFlags.mDirty = 0;
|
|
}
|
|
PRBool IsDirty() const {
|
|
return mFlags.mDirty;
|
|
}
|
|
|
|
// mImpactedByFloater bit
|
|
void SetLineIsImpactedByFloater(PRBool aValue) {
|
|
mFlags.mImpactedByFloater = aValue;
|
|
}
|
|
PRBool IsImpactedByFloater() const {
|
|
return mFlags.mImpactedByFloater;
|
|
}
|
|
|
|
// mTrimmed bit
|
|
void SetTrimmed(PRBool aOn) {
|
|
mFlags.mTrimmed = aOn;
|
|
}
|
|
PRBool IsTrimmed() const {
|
|
return mFlags.mTrimmed;
|
|
}
|
|
|
|
void SetHasPercentageChild(PRBool aOn) {
|
|
mFlags.mHasPercentageChild = aOn;
|
|
}
|
|
PRBool HasPercentageChild() const {
|
|
return mFlags.mHasPercentageChild;
|
|
}
|
|
|
|
// mChildCount value
|
|
PRInt32 GetChildCount() const {
|
|
return (PRInt32) mFlags.mChildCount;
|
|
}
|
|
void SetChildCount(PRInt32 aNewCount) {
|
|
if (NS_WARN_IF_FALSE(aNewCount >= 0, "negative child count")) {
|
|
aNewCount = 0;
|
|
}
|
|
if (aNewCount > LINE_MAX_CHILD_COUNT) {
|
|
aNewCount = LINE_MAX_CHILD_COUNT;
|
|
}
|
|
mFlags.mChildCount = aNewCount;
|
|
}
|
|
|
|
// mBreakType value
|
|
PRBool HasBreak() const {
|
|
return NS_STYLE_CLEAR_NONE != mFlags.mBreakType;
|
|
}
|
|
void SetBreakType(PRUint8 aBreakType) {
|
|
NS_WARN_IF_FALSE(aBreakType <= LINE_MAX_BREAK_TYPE, "bad break type");
|
|
mFlags.mBreakType = aBreakType;
|
|
}
|
|
PRUint8 GetBreakType() const {
|
|
return mFlags.mBreakType;
|
|
}
|
|
|
|
// mCarriedOutBottomMargin value
|
|
nscoord GetCarriedOutBottomMargin() const;
|
|
void SetCarriedOutBottomMargin(nscoord aValue);
|
|
|
|
// mFloaters
|
|
PRBool HasFloaters() const {
|
|
return (IsInline() && mInlineData) && mInlineData->mFloaters.NotEmpty();
|
|
}
|
|
nsFloaterCache* GetFirstFloater();
|
|
void FreeFloaters(nsFloaterCacheFreeList& aFreeList);
|
|
void AppendFloaters(nsFloaterCacheFreeList& aFreeList);
|
|
PRBool RemoveFloater(nsIFrame* aFrame);
|
|
|
|
// Combined area
|
|
void SetCombinedArea(const nsRect& aCombinedArea);
|
|
void GetCombinedArea(nsRect* aResult);
|
|
PRBool CombinedAreaIntersects(const nsRect& aDamageRect) {
|
|
nsRect* ca = (mData ? &mData->mCombinedArea : &mBounds);
|
|
return !((ca->YMost() <= aDamageRect.y) ||
|
|
(ca->y >= aDamageRect.YMost()));
|
|
}
|
|
|
|
void SlideBy(nscoord aDY) {
|
|
mBounds.y += aDY;
|
|
if (mData) {
|
|
mData->mCombinedArea.y += aDY;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
nscoord GetHeight() const {
|
|
return mBounds.height;
|
|
}
|
|
|
|
static void DeleteLineList(nsIPresContext* aPresContext, nsLineBox* aLine);
|
|
|
|
static nsLineBox* LastLine(nsLineBox* aLine);
|
|
|
|
static nsLineBox* FindLineContaining(nsLineBox* aLine, nsIFrame* aFrame,
|
|
PRInt32* aFrameIndexInLine);
|
|
|
|
#ifdef DEBUG
|
|
void List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
|
|
#endif
|
|
|
|
nsIFrame* LastChild() const;
|
|
|
|
PRBool IsLastChild(nsIFrame* aFrame) const;
|
|
|
|
char* StateToString(char* aBuf, PRInt32 aBufSize) const;
|
|
|
|
PRInt32 IndexOf(nsIFrame* aFrame) const;
|
|
|
|
PRBool Contains(nsIFrame* aFrame) const {
|
|
return IndexOf(aFrame) >= 0;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsIAtom* SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
|
|
static PRInt32 GetCtorCount();
|
|
static PRInt32 ListLength(nsLineBox* aLine);
|
|
#endif
|
|
|
|
nsIFrame* mFirstChild;
|
|
nsLineBox* mNext;
|
|
|
|
nsRect mBounds;
|
|
nscoord mMaxElementWidth; // width part of max-element-size
|
|
|
|
struct FlagBits {
|
|
PRUint32 mDirty : 1;
|
|
PRUint32 mBlock : 1;
|
|
PRUint32 mImpactedByFloater : 1;
|
|
PRUint32 mTrimmed : 1;
|
|
PRUint32 mHasPercentageChild : 1;
|
|
|
|
PRUint32 mBreakType : 4;
|
|
|
|
PRUint32 mChildCount : 23;
|
|
};
|
|
|
|
struct ExtraData {
|
|
ExtraData(const nsRect& aBounds) : mCombinedArea(aBounds) {
|
|
}
|
|
nsRect mCombinedArea;
|
|
};
|
|
|
|
struct ExtraBlockData : public ExtraData {
|
|
ExtraBlockData(const nsRect& aBounds) : ExtraData(aBounds) {
|
|
mCarriedOutBottomMargin = 0;
|
|
}
|
|
nscoord mCarriedOutBottomMargin;
|
|
};
|
|
|
|
struct ExtraInlineData : public ExtraData {
|
|
ExtraInlineData(const nsRect& aBounds) : ExtraData(aBounds) {
|
|
}
|
|
nsFloaterCacheList mFloaters;
|
|
};
|
|
|
|
protected:
|
|
union {
|
|
PRUint32 mAllFlags;
|
|
FlagBits mFlags;
|
|
};
|
|
|
|
union {
|
|
ExtraData* mData;
|
|
ExtraBlockData* mBlockData;
|
|
ExtraInlineData* mInlineData;
|
|
};
|
|
|
|
void Cleanup();
|
|
void MaybeFreeData();
|
|
};
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
class nsLineIterator : public nsILineIterator {
|
|
public:
|
|
nsLineIterator();
|
|
virtual ~nsLineIterator();
|
|
|
|
NS_DECL_ISUPPORTS
|
|
|
|
NS_IMETHOD GetNumLines(PRInt32* aResult);
|
|
NS_IMETHOD GetDirection(PRBool* aIsRightToLeft);
|
|
NS_IMETHOD GetLine(PRInt32 aLineNumber,
|
|
nsIFrame** aFirstFrameOnLine,
|
|
PRInt32* aNumFramesOnLine,
|
|
nsRect& aLineBounds,
|
|
PRUint32* aLineFlags);
|
|
NS_IMETHOD FindLineContaining(nsIFrame* aFrame,
|
|
PRInt32* aLineNumberResult);
|
|
NS_IMETHOD FindLineAt(nscoord aY,
|
|
PRInt32* aLineNumberResult);
|
|
NS_IMETHOD FindFrameAt(PRInt32 aLineNumber,
|
|
nscoord aX,
|
|
nsIFrame** aFrameFound,
|
|
PRBool* aXIsBeforeFirstFrame,
|
|
PRBool* aXIsAfterLastFrame);
|
|
|
|
nsresult Init(nsLineBox* aLines, PRBool aRightToLeft);
|
|
|
|
protected:
|
|
PRInt32 NumLines() const {
|
|
return mNumLines;
|
|
}
|
|
|
|
nsLineBox* CurrentLine() {
|
|
return mLines[mIndex];
|
|
}
|
|
|
|
nsLineBox* PrevLine() {
|
|
if (0 == mIndex) {
|
|
return nsnull;
|
|
}
|
|
return mLines[--mIndex];
|
|
}
|
|
|
|
nsLineBox* NextLine() {
|
|
if (mIndex >= mNumLines - 1) {
|
|
return nsnull;
|
|
}
|
|
return mLines[++mIndex];
|
|
}
|
|
|
|
nsLineBox* LineAt(PRInt32 aIndex) {
|
|
if ((aIndex < 0) || (aIndex >= mNumLines)) {
|
|
return nsnull;
|
|
}
|
|
return mLines[aIndex];
|
|
}
|
|
|
|
nsLineBox** mLines;
|
|
PRInt32 mIndex;
|
|
PRInt32 mNumLines;
|
|
PRBool mRightToLeft;
|
|
};
|
|
|
|
#endif /* nsLineBox_h___ */
|