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172 lines
3.9 KiB
C++
172 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#ifndef nsLineBox_h___
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#define nsLineBox_h___
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#include "nsVoidArray.h"
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#include "nsPlaceholderFrame.h"
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// bits in nsLineBox.mFlags
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#define LINE_IS_DIRTY 0x1
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#define LINE_IS_BLOCK 0x2
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#define LINE_NEED_DID_REFLOW 0x8
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#define LINE_TOP_MARGIN_IS_AUTO 0x10
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#define LINE_BOTTOM_MARGIN_IS_AUTO 0x20
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#define LINE_OUTSIDE_CHILDREN 0x40
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#define LINE_ISA_EMPTY_LINE 0x80
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class nsISpaceManager;
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class nsLineBox;
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/**
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* The nsLineBox class represents a horizontal line of frames. It contains
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* enough state to support incremental reflow of the frames, event handling
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* for the frames, and rendering of the frames.
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*/
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class nsLineBox {
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public:
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nscoord GetCarriedOutBottomMargin() const {
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return mCarriedOutBottomMargin;
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}
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nscoord GetHeight() const { return mBounds.height; }
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#ifdef NS_DEBUG
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PRBool CheckIsBlock() const;
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#endif
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PRBool IsEmptyLine() const {
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return 0 != (mState & LINE_ISA_EMPTY_LINE);
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}
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void SetIsEmptyLine(PRBool aSetting) {
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if (aSetting)
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mState |= aSetting;
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else
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mState &= ~aSetting;
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}
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//----------------------------------------------------------------------
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// XXX old junk
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nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRUint16 flags);
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~nsLineBox();
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static void DeleteLineList(nsIPresContext& aPresContext, nsLineBox* aLine);
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static nsLineBox* LastLine(nsLineBox* aLine);
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static nsLineBox* FindLineContaining(nsLineBox* aLine, nsIFrame* aFrame);
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void List(FILE* out, PRInt32 aIndent) const;
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PRInt32 ChildCount() const {
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return PRInt32(mChildCount);
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}
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nsIFrame* LastChild() const;
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PRBool IsLastChild(nsIFrame* aFrame) const;
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PRBool IsBlock() const {
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return 0 != (LINE_IS_BLOCK & mState);
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}
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void SetIsBlock() {
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mState |= LINE_IS_BLOCK;
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}
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void ClearIsBlock() {
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mState &= ~LINE_IS_BLOCK;
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}
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void SetIsBlock(PRBool aValue) {
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if (aValue) {
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SetIsBlock();
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}
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else {
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ClearIsBlock();
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}
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}
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void MarkDirty() {
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mState |= LINE_IS_DIRTY;
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}
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void ClearDirty() {
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mState &= ~LINE_IS_DIRTY;
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}
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void SetNeedDidReflow() {
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mState |= LINE_NEED_DID_REFLOW;
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}
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void ClearNeedDidReflow() {
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mState &= ~LINE_NEED_DID_REFLOW;
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}
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PRBool NeedsDidReflow() {
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return 0 != (LINE_NEED_DID_REFLOW & mState);
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}
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PRBool IsDirty() const {
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return 0 != (LINE_IS_DIRTY & mState);
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}
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#ifdef XXX_need_line_outside_children
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void SetOutsideChildren() {
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mState |= LINE_OUTSIDE_CHILDREN;
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}
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void ClearOutsideChildren() {
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mState &= ~LINE_OUTSIDE_CHILDREN;
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}
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PRBool OutsideChildren() const {
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return 0 != (LINE_OUTSIDE_CHILDREN & mState);
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}
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#endif
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PRUint16 GetState() const { return mState; }
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char* StateToString(char* aBuf, PRInt32 aBufSize) const;
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PRBool Contains(nsIFrame* aFrame) const;
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#ifdef NS_DEBUG
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void Verify();
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#endif
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//XXX protected:
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nsIFrame* mFirstChild;
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PRUint16 mChildCount;
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PRUint16 mState;
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PRUint8 mBreakType;
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nsRect mBounds;
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nsRect mCombinedArea;
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nscoord mCarriedOutBottomMargin;/* XXX switch to 16 bits */
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nsVoidArray* mFloaters;
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nsLineBox* mNext;
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protected:
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};
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#endif /* nsLineBox_h___ */
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