pjs/layout/generic/nsLineBox.h

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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 "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.
*/
#ifndef nsLineBox_h___
#define nsLineBox_h___
#include "nsVoidArray.h"
#include "nsPlaceholderFrame.h"
// bits in nsLineBox.mFlags
#define LINE_IS_DIRTY 0x1
#define LINE_IS_BLOCK 0x2
#define LINE_NEED_DID_REFLOW 0x8
#define LINE_TOP_MARGIN_IS_AUTO 0x10
#define LINE_BOTTOM_MARGIN_IS_AUTO 0x20
#define LINE_OUTSIDE_CHILDREN 0x40
#define LINE_ISA_EMPTY_LINE 0x80
class nsISpaceManager;
class nsLineBox;
/**
* 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:
nscoord GetCarriedOutBottomMargin() const {
return mCarriedOutBottomMargin;
}
nscoord GetHeight() const { return mBounds.height; }
#ifdef NS_DEBUG
PRBool CheckIsBlock() const;
#endif
PRBool IsEmptyLine() const {
return 0 != (mState & LINE_ISA_EMPTY_LINE);
}
void SetIsEmptyLine(PRBool aSetting) {
if (aSetting)
mState |= aSetting;
else
mState &= ~aSetting;
}
//----------------------------------------------------------------------
// XXX old junk
nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRUint16 flags);
~nsLineBox();
static void DeleteLineList(nsIPresContext& aPresContext, nsLineBox* aLine);
static nsLineBox* LastLine(nsLineBox* aLine);
static nsLineBox* FindLineContaining(nsLineBox* aLine, nsIFrame* aFrame);
void List(FILE* out, PRInt32 aIndent) const;
PRInt32 ChildCount() const {
return PRInt32(mChildCount);
}
nsIFrame* LastChild() const;
PRBool IsLastChild(nsIFrame* aFrame) const;
PRBool IsBlock() const {
return 0 != (LINE_IS_BLOCK & mState);
}
void SetIsBlock() {
mState |= LINE_IS_BLOCK;
}
void ClearIsBlock() {
mState &= ~LINE_IS_BLOCK;
}
void SetIsBlock(PRBool aValue) {
if (aValue) {
SetIsBlock();
}
else {
ClearIsBlock();
}
}
void MarkDirty() {
mState |= LINE_IS_DIRTY;
}
void ClearDirty() {
mState &= ~LINE_IS_DIRTY;
}
void SetNeedDidReflow() {
mState |= LINE_NEED_DID_REFLOW;
}
void ClearNeedDidReflow() {
mState &= ~LINE_NEED_DID_REFLOW;
}
PRBool NeedsDidReflow() {
return 0 != (LINE_NEED_DID_REFLOW & mState);
}
PRBool IsDirty() const {
return 0 != (LINE_IS_DIRTY & mState);
}
#ifdef XXX_need_line_outside_children
void SetOutsideChildren() {
mState |= LINE_OUTSIDE_CHILDREN;
}
void ClearOutsideChildren() {
mState &= ~LINE_OUTSIDE_CHILDREN;
}
PRBool OutsideChildren() const {
return 0 != (LINE_OUTSIDE_CHILDREN & mState);
}
#endif
PRUint16 GetState() const { return mState; }
char* StateToString(char* aBuf, PRInt32 aBufSize) const;
PRBool Contains(nsIFrame* aFrame) const;
#ifdef NS_DEBUG
void Verify();
#endif
//XXX protected:
nsIFrame* mFirstChild;
PRUint16 mChildCount;
PRUint16 mState;
PRUint8 mBreakType;
nsRect mBounds;
nsRect mCombinedArea;
nscoord mCarriedOutBottomMargin;/* XXX switch to 16 bits */
nsVoidArray* mFloaters;
nsLineBox* mNext;
protected:
};
#endif /* nsLineBox_h___ */