mirror of
https://github.com/mozilla/gecko-dev.git
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1490 lines
40 KiB
C++
1490 lines
40 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (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" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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#include "nsILineIterator.h"
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class nsSpaceManager;
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class nsLineBox;
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class nsFloatCache;
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class nsFloatCacheList;
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class nsFloatCacheFreeList;
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// State cached after reflowing a float. This state is used during
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// incremental reflow when we avoid reflowing a float.
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class nsFloatCache {
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public:
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nsFloatCache();
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#ifdef NS_BUILD_REFCNT_LOGGING
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~nsFloatCache();
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#else
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~nsFloatCache() { }
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#endif
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nsFloatCache* Next() const { return mNext; }
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nsPlaceholderFrame* mPlaceholder; // nsPlaceholderFrame
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// This will be true if the float was placed on the current line
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// instead of below the current line.
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PRBool mIsCurrentLineFloat;
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nsMargin mMargins; // computed margins
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nsMargin mOffsets; // computed offsets (relative pos)
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// Region in the spacemanager impacted by this float; the
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// coordinates are relative to the containing block frame. The
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// region includes the margins around the float, but doesn't
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// include the relative offsets.
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nsRect mRegion;
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// Combined area for the float. This will not include the margins
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// for the float. Like mRegion, the coordinates are relative to
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// the containing block frame.
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nsRect mCombinedArea;
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// The float's max-element-width.
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nscoord mMaxElementWidth;
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protected:
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nsFloatCache* mNext;
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friend class nsFloatCacheList;
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friend class nsFloatCacheFreeList;
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};
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//----------------------------------------
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class nsFloatCacheList {
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public:
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nsFloatCacheList() : mHead(nsnull) { }
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~nsFloatCacheList();
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PRBool IsEmpty() const {
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return nsnull == mHead;
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}
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PRBool NotEmpty() const {
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return nsnull != mHead;
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}
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nsFloatCache* Head() const {
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return mHead;
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}
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nsFloatCache* Tail() const;
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nsFloatCache* Find(nsIFrame* aOutOfFlowFrame);
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void Remove(nsFloatCache* aElement);
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void Append(nsFloatCacheFreeList& aList);
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protected:
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nsFloatCache* mHead;
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friend class nsFloatCacheFreeList;
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};
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//---------------------------------------
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class nsFloatCacheFreeList : public nsFloatCacheList {
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public:
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nsFloatCacheFreeList() : mTail(nsnull) { }
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~nsFloatCacheFreeList() { }
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// Steal away aList's nsFloatCache objects and put them on this
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// free-list.
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void Append(nsFloatCacheList& aList);
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void Append(nsFloatCache* aFloatCache);
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// Allocate a new nsFloatCache object
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nsFloatCache* Alloc();
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protected:
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nsFloatCache* mTail;
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friend class nsFloatCacheList;
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};
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//----------------------------------------------------------------------
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#define LINE_MAX_BREAK_TYPE ((1 << 4) - 1)
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#define LINE_MAX_CHILD_COUNT ((1 << 20) - 1)
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#if NS_STYLE_CLEAR_LAST_VALUE > 15
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need to rearrange the mBits bitfield;
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#endif
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// Funtion to create a line box
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nsLineBox* NS_NewLineBox(nsIPresShell* aPresShell, nsIFrame* aFrame,
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PRInt32 aCount, PRBool aIsBlock);
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class nsLineList;
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// don't use the following names outside of this file. Instead, use
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// nsLineList::iterator, etc. These are just here to allow them to
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// be specified as parameters to methods of nsLineBox.
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class nsLineList_iterator;
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class nsLineList_const_iterator;
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class nsLineList_reverse_iterator;
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class nsLineList_const_reverse_iterator;
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/**
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* Users must have the class that is to be part of the list inherit
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* from nsLineLink. If they want to be efficient, it should be the
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* first base class. (This was originally nsCLink in a templatized
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* nsCList, but it's still useful separately.)
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*/
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class nsLineLink {
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public:
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friend class nsLineList;
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friend class nsLineList_iterator;
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friend class nsLineList_reverse_iterator;
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friend class nsLineList_const_iterator;
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friend class nsLineList_const_reverse_iterator;
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private:
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nsLineLink *_mNext; // or head
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nsLineLink *_mPrev; // or tail
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};
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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 : public nsLineLink {
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private:
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nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRBool aIsBlock);
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~nsLineBox();
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// Overloaded new operator. Uses an arena (which comes from the presShell)
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// to perform the allocation.
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void* operator new(size_t sz, nsIPresShell* aPresShell) CPP_THROW_NEW;
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void operator delete(void* aPtr, size_t sz);
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public:
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// Use these two functions to allocate and destroy line boxes
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friend nsLineBox* NS_NewLineBox(nsIPresShell* aPresShell, nsIFrame* aFrame,
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PRInt32 aCount, PRBool aIsBlock);
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void Destroy(nsIPresShell* aPresShell);
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// mBlock bit
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PRBool IsBlock() const {
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return mFlags.mBlock;
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}
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PRBool IsInline() const {
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return 0 == mFlags.mBlock;
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}
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// mDirty bit
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void MarkDirty() {
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mFlags.mDirty = 1;
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}
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void ClearDirty() {
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mFlags.mDirty = 0;
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}
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PRBool IsDirty() const {
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return mFlags.mDirty;
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}
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// mPreviousMarginDirty bit
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void MarkPreviousMarginDirty() {
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mFlags.mPreviousMarginDirty = 1;
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}
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void ClearPreviousMarginDirty() {
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mFlags.mPreviousMarginDirty = 0;
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}
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PRBool IsPreviousMarginDirty() const {
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return mFlags.mPreviousMarginDirty;
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}
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// mImpactedByFloat bit
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void SetLineIsImpactedByFloat(PRBool aValue) {
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NS_ASSERTION((PR_FALSE==aValue || PR_TRUE==aValue), "somebody is playing fast and loose with bools and bits!");
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mFlags.mImpactedByFloat = aValue;
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}
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PRBool IsImpactedByFloat() const {
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return mFlags.mImpactedByFloat;
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}
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// mHasPercentageChild bit
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void SetHasPercentageChild(PRBool aOn) {
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NS_ASSERTION((PR_FALSE==aOn || PR_TRUE==aOn), "somebody is playing fast and loose with bools and bits!");
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mFlags.mHasPercentageChild = aOn;
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}
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PRBool HasPercentageChild() const {
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return mFlags.mHasPercentageChild;
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}
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// mLineWrapped bit
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void SetLineWrapped(PRBool aOn) {
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NS_ASSERTION((PR_FALSE==aOn || PR_TRUE==aOn), "somebody is playing fast and loose with bools and bits!");
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mFlags.mLineWrapped = aOn;
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}
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PRBool IsLineWrapped() const {
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return mFlags.mLineWrapped;
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}
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// mLineWrapped bit
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void SetForceInvalidate(PRBool aOn) {
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NS_ASSERTION((PR_FALSE==aOn || PR_TRUE==aOn), "somebody is playing fast and loose with bools and bits!");
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mFlags.mForceInvalidate = aOn;
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}
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PRBool IsForceInvalidate() const {
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return mFlags.mForceInvalidate;
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}
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// mResizeReflowOptimizationDisabled bit
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void DisableResizeReflowOptimization() {
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mFlags.mResizeReflowOptimizationDisabled = PR_TRUE;
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}
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void EnableResizeReflowOptimization() {
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mFlags.mResizeReflowOptimizationDisabled = PR_FALSE;
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}
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PRBool ResizeReflowOptimizationDisabled() const {
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return mFlags.mResizeReflowOptimizationDisabled;
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}
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// mChildCount value
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PRInt32 GetChildCount() const {
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return (PRInt32) mFlags.mChildCount;
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}
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void SetChildCount(PRInt32 aNewCount) {
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if (aNewCount < 0) {
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NS_WARNING("negative child count");
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aNewCount = 0;
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}
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if (aNewCount > LINE_MAX_CHILD_COUNT) {
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aNewCount = LINE_MAX_CHILD_COUNT;
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}
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mFlags.mChildCount = aNewCount;
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}
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// mBreakType value
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PRBool HasBreak() const {
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return NS_STYLE_CLEAR_NONE != mFlags.mBreakType;
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}
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void SetBreakType(PRUint8 aBreakType) {
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NS_WARN_IF_FALSE(aBreakType <= LINE_MAX_BREAK_TYPE, "bad break type");
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mFlags.mBreakType = aBreakType;
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}
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PRUint8 GetBreakType() const {
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return mFlags.mBreakType;
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}
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// mCarriedOutBottomMargin value
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nsCollapsingMargin GetCarriedOutBottomMargin() const;
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void SetCarriedOutBottomMargin(nsCollapsingMargin aValue);
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// mFloats
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PRBool HasFloats() const {
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return (IsInline() && mInlineData) && mInlineData->mFloats.NotEmpty();
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}
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nsFloatCache* GetFirstFloat();
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void FreeFloats(nsFloatCacheFreeList& aFreeList);
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void AppendFloats(nsFloatCacheFreeList& aFreeList);
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PRBool RemoveFloat(nsIFrame* aFrame);
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// Combined area is the area of the line that should influence the
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// overflow area of its parent block. The combined area should be
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// used for painting-related things, but should never be used for
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// layout (except for handling of 'overflow').
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void SetCombinedArea(const nsRect& aCombinedArea);
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void GetCombinedArea(nsRect* aResult);
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PRBool CombinedAreaIntersects(const nsRect& aDamageRect) {
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nsRect* ca = (mData ? &mData->mCombinedArea : &mBounds);
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return !((ca->YMost() <= aDamageRect.y) ||
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(ca->y >= aDamageRect.YMost()));
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}
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void SlideBy(nscoord aDY) {
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mBounds.y += aDY;
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if (mData) {
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mData->mCombinedArea.y += aDY;
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}
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}
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/**
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* The ascent (distance from top to baseline) of the linebox is the
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* ascent of the anonymous inline box (for which we don't actually
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* create a frame) that wraps all the consecutive inline children of a
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* block.
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*
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* This is currently unused for block lines.
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*/
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nscoord GetAscent() const { return mAscent; }
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void SetAscent(nscoord aAscent) { mAscent = aAscent; }
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nscoord GetHeight() const {
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return mBounds.height;
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}
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static void DeleteLineList(nsIPresContext* aPresContext, nsLineList& aLines);
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// search from beginning to end
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// XXX Should switch to API below
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static nsLineBox* FindLineContaining(nsLineList& aLines, nsIFrame* aFrame,
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PRInt32* aFrameIndexInLine);
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// search from end to beginning of [aBegin, aEnd)
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// Returns PR_TRUE if it found the line and PR_FALSE if not.
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// Moves aEnd as it searches so that aEnd points to the resulting line.
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static PRBool RFindLineContaining(nsIFrame* aFrame,
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const nsLineList_iterator& aBegin,
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nsLineList_iterator& aEnd,
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PRInt32* aFrameIndexInLine);
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#ifdef DEBUG
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char* StateToString(char* aBuf, PRInt32 aBufSize) const;
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void List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
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#endif
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nsIFrame* LastChild() const;
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PRBool IsLastChild(nsIFrame* aFrame) const;
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PRInt32 IndexOf(nsIFrame* aFrame) const;
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PRBool Contains(nsIFrame* aFrame) const {
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return IndexOf(aFrame) >= 0;
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}
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// whether the line box is "logically" empty (just like nsIFrame::IsEmpty)
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PRBool IsEmpty() const;
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#ifdef DEBUG
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static PRInt32 GetCtorCount();
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#endif
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nsIFrame* mFirstChild;
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nsRect mBounds;
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nscoord mMaxElementWidth; // width part of max-element-size
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nscoord mMaximumWidth; // maximum width (needed for incremental reflow of tables)
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struct FlagBits {
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PRUint32 mDirty : 1;
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PRUint32 mPreviousMarginDirty : 1;
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PRUint32 mBlock : 1;
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PRUint32 mImpactedByFloat : 1;
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PRUint32 mHasPercentageChild : 1;
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PRUint32 mLineWrapped: 1;
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PRUint32 mForceInvalidate: 1; // default 0 = means this line handles it's own invalidation. 1 = always invalidate this entire line
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PRUint32 mResizeReflowOptimizationDisabled: 1; // default 0 = means that the opt potentially applies to this line. 1 = never skip reflowing this line for a resize reflow
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PRUint32 mBreakType : 4;
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PRUint32 mChildCount : 20;
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};
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struct ExtraData {
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ExtraData(const nsRect& aBounds) : mCombinedArea(aBounds) {
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}
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nsRect mCombinedArea;
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};
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struct ExtraBlockData : public ExtraData {
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ExtraBlockData(const nsRect& aBounds)
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: ExtraData(aBounds),
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mCarriedOutBottomMargin()
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{
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}
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nsCollapsingMargin mCarriedOutBottomMargin;
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};
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struct ExtraInlineData : public ExtraData {
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ExtraInlineData(const nsRect& aBounds) : ExtraData(aBounds) {
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}
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nsFloatCacheList mFloats;
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};
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protected:
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nscoord mAscent; // see |SetAscent| / |GetAscent|
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union {
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PRUint32 mAllFlags;
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FlagBits mFlags;
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};
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union {
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ExtraData* mData;
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ExtraBlockData* mBlockData;
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ExtraInlineData* mInlineData;
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};
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void Cleanup();
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void MaybeFreeData();
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};
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#ifdef DEBUG
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#define NS_LINELIST_DEBUG_PASS_END
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#else
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#undef NS_LINELIST_DEBUG_PASS_END
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#endif
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/**
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* A linked list type where the items in the list must inherit from
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* a link type to fuse allocations.
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*
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* API heavily based on the |list| class in the C++ standard.
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*/
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class nsLineList_iterator {
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public:
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friend class nsLineList;
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friend class nsLineList_reverse_iterator;
|
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friend class nsLineList_const_iterator;
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friend class nsLineList_const_reverse_iterator;
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|
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typedef nsLineList_iterator iterator_self_type;
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typedef nsLineList_reverse_iterator iterator_reverse_type;
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|
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typedef nsLineBox& reference;
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typedef const nsLineBox& const_reference;
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typedef nsLineBox* pointer;
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typedef const nsLineBox* const_pointer;
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typedef PRUint32 size_type;
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typedef PRInt32 difference_type;
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|
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typedef nsLineLink link_type;
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|
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// Auto generated default constructor OK.
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|
// Auto generated copy-constructor OK.
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|
|
inline iterator_self_type&
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|
operator=(const iterator_self_type& aOther);
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|
inline iterator_self_type&
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operator=(const iterator_reverse_type& aOther);
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|
iterator_self_type& operator++()
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|
{
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|
mCurrent = mCurrent->_mNext;
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return *this;
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|
}
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|
|
iterator_self_type operator++(int)
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|
{
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|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mNext;
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|
return rv;
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|
}
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|
|
iterator_self_type& operator--()
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|
{
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|
mCurrent = mCurrent->_mPrev;
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|
return *this;
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|
}
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|
iterator_self_type operator--(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mPrev;
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|
return rv;
|
|
}
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|
|
reference operator*()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
pointer operator->()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
pointer get()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
operator pointer()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
const_reference operator*() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer operator->() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
#ifndef __MWERKS__
|
|
operator const_pointer() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
#endif /* !__MWERKS__ */
|
|
|
|
iterator_self_type next()
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return ++copy;
|
|
}
|
|
|
|
const iterator_self_type next() const
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return ++copy;
|
|
}
|
|
|
|
iterator_self_type prev()
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return --copy;
|
|
}
|
|
|
|
const iterator_self_type prev() const
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return --copy;
|
|
}
|
|
|
|
// Passing by value rather than by reference and reference to const
|
|
// to keep AIX happy.
|
|
// XXX Should add assertions that |mListLink| is the same for both.
|
|
PRBool operator==(const iterator_self_type aOther) const
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther) const
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
PRBool operator==(const iterator_self_type aOther)
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther)
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
|
|
private:
|
|
link_type *mCurrent;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
link_type *mListLink; // the list's link, i.e., the end
|
|
#endif
|
|
};
|
|
|
|
class nsLineList_reverse_iterator {
|
|
|
|
public:
|
|
|
|
friend class nsLineList;
|
|
friend class nsLineList_iterator;
|
|
friend class nsLineList_const_iterator;
|
|
friend class nsLineList_const_reverse_iterator;
|
|
|
|
typedef nsLineList_reverse_iterator iterator_self_type;
|
|
typedef nsLineList_iterator iterator_reverse_type;
|
|
|
|
typedef nsLineBox& reference;
|
|
typedef const nsLineBox& const_reference;
|
|
|
|
typedef nsLineBox* pointer;
|
|
typedef const nsLineBox* const_pointer;
|
|
|
|
typedef PRUint32 size_type;
|
|
typedef PRInt32 difference_type;
|
|
|
|
typedef nsLineLink link_type;
|
|
|
|
// Auto generated default constructor OK.
|
|
// Auto generated copy-constructor OK.
|
|
|
|
inline iterator_self_type&
|
|
operator=(const iterator_reverse_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_self_type& aOther);
|
|
|
|
iterator_self_type& operator++()
|
|
{
|
|
mCurrent = mCurrent->_mPrev;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator++(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mPrev;
|
|
return rv;
|
|
}
|
|
|
|
iterator_self_type& operator--()
|
|
{
|
|
mCurrent = mCurrent->_mNext;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator--(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mNext;
|
|
return rv;
|
|
}
|
|
|
|
reference operator*()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
pointer operator->()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
pointer get()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
operator pointer()
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(pointer, mCurrent);
|
|
}
|
|
|
|
const_reference operator*() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer operator->() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
#ifndef __MWERKS__
|
|
operator const_pointer() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
#endif /* !__MWERKS__ */
|
|
|
|
// Passing by value rather than by reference and reference to const
|
|
// to keep AIX happy.
|
|
PRBool operator==(const iterator_self_type aOther) const
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther) const
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
PRBool operator==(const iterator_self_type aOther)
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther)
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
|
|
private:
|
|
link_type *mCurrent;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
link_type *mListLink; // the list's link, i.e., the end
|
|
#endif
|
|
};
|
|
|
|
class nsLineList_const_iterator {
|
|
public:
|
|
|
|
friend class nsLineList;
|
|
friend class nsLineList_iterator;
|
|
friend class nsLineList_reverse_iterator;
|
|
friend class nsLineList_const_reverse_iterator;
|
|
|
|
typedef nsLineList_const_iterator iterator_self_type;
|
|
typedef nsLineList_const_reverse_iterator iterator_reverse_type;
|
|
typedef nsLineList_iterator iterator_nonconst_type;
|
|
typedef nsLineList_reverse_iterator iterator_nonconst_reverse_type;
|
|
|
|
typedef nsLineBox& reference;
|
|
typedef const nsLineBox& const_reference;
|
|
|
|
typedef nsLineBox* pointer;
|
|
typedef const nsLineBox* const_pointer;
|
|
|
|
typedef PRUint32 size_type;
|
|
typedef PRInt32 difference_type;
|
|
|
|
typedef nsLineLink link_type;
|
|
|
|
// Auto generated default constructor OK.
|
|
// Auto generated copy-constructor OK.
|
|
|
|
inline iterator_self_type&
|
|
operator=(const iterator_nonconst_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_nonconst_reverse_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_self_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_reverse_type& aOther);
|
|
|
|
iterator_self_type& operator++()
|
|
{
|
|
mCurrent = mCurrent->_mNext;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator++(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mNext;
|
|
return rv;
|
|
}
|
|
|
|
iterator_self_type& operator--()
|
|
{
|
|
mCurrent = mCurrent->_mPrev;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator--(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mPrev;
|
|
return rv;
|
|
}
|
|
|
|
const_reference operator*() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer operator->() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer get() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
#ifndef __MWERKS__
|
|
operator const_pointer() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
#endif /* !__MWERKS__ */
|
|
|
|
const iterator_self_type next() const
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return ++copy;
|
|
}
|
|
|
|
const iterator_self_type prev() const
|
|
{
|
|
iterator_self_type copy(*this);
|
|
return --copy;
|
|
}
|
|
|
|
// Passing by value rather than by reference and reference to const
|
|
// to keep AIX happy.
|
|
PRBool operator==(const iterator_self_type aOther) const
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther) const
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
PRBool operator==(const iterator_self_type aOther)
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther)
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
|
|
private:
|
|
const link_type *mCurrent;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
const link_type *mListLink; // the list's link, i.e., the end
|
|
#endif
|
|
};
|
|
|
|
class nsLineList_const_reverse_iterator {
|
|
public:
|
|
|
|
friend class nsLineList;
|
|
friend class nsLineList_iterator;
|
|
friend class nsLineList_reverse_iterator;
|
|
friend class nsLineList_const_iterator;
|
|
|
|
typedef nsLineList_const_reverse_iterator iterator_self_type;
|
|
typedef nsLineList_const_iterator iterator_reverse_type;
|
|
typedef nsLineList_iterator iterator_nonconst_reverse_type;
|
|
typedef nsLineList_reverse_iterator iterator_nonconst_type;
|
|
|
|
typedef nsLineBox& reference;
|
|
typedef const nsLineBox& const_reference;
|
|
|
|
typedef nsLineBox* pointer;
|
|
typedef const nsLineBox* const_pointer;
|
|
|
|
typedef PRUint32 size_type;
|
|
typedef PRInt32 difference_type;
|
|
|
|
typedef nsLineLink link_type;
|
|
|
|
// Auto generated default constructor OK.
|
|
// Auto generated copy-constructor OK.
|
|
|
|
inline iterator_self_type&
|
|
operator=(const iterator_nonconst_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_nonconst_reverse_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_self_type& aOther);
|
|
inline iterator_self_type&
|
|
operator=(const iterator_reverse_type& aOther);
|
|
|
|
iterator_self_type& operator++()
|
|
{
|
|
mCurrent = mCurrent->_mPrev;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator++(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mPrev;
|
|
return rv;
|
|
}
|
|
|
|
iterator_self_type& operator--()
|
|
{
|
|
mCurrent = mCurrent->_mNext;
|
|
return *this;
|
|
}
|
|
|
|
iterator_self_type operator--(int)
|
|
{
|
|
iterator_self_type rv(*this);
|
|
mCurrent = mCurrent->_mNext;
|
|
return rv;
|
|
}
|
|
|
|
const_reference operator*() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return *NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer operator->() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
const_pointer get() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
|
|
#ifndef __MWERKS__
|
|
operator const_pointer() const
|
|
{
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
NS_ASSERTION(mCurrent != mListLink, "running past end");
|
|
#endif
|
|
return NS_STATIC_CAST(const_pointer, mCurrent);
|
|
}
|
|
#endif /* !__MWERKS__ */
|
|
|
|
// Passing by value rather than by reference and reference to const
|
|
// to keep AIX happy.
|
|
PRBool operator==(const iterator_self_type aOther) const
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther) const
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
PRBool operator==(const iterator_self_type aOther)
|
|
{ return mCurrent == aOther.mCurrent; }
|
|
PRBool operator!=(const iterator_self_type aOther)
|
|
{ return mCurrent != aOther.mCurrent; }
|
|
|
|
//private:
|
|
const link_type *mCurrent;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
const link_type *mListLink; // the list's link, i.e., the end
|
|
#endif
|
|
};
|
|
|
|
class nsLineList {
|
|
|
|
public:
|
|
|
|
friend class nsLineList_iterator;
|
|
friend class nsLineList_reverse_iterator;
|
|
friend class nsLineList_const_iterator;
|
|
friend class nsLineList_const_reverse_iterator;
|
|
|
|
typedef PRUint32 size_type;
|
|
typedef PRInt32 difference_type;
|
|
|
|
typedef nsLineLink link_type;
|
|
|
|
private:
|
|
link_type mLink;
|
|
|
|
public:
|
|
typedef nsLineList self_type;
|
|
|
|
typedef nsLineBox& reference;
|
|
typedef const nsLineBox& const_reference;
|
|
|
|
typedef nsLineBox* pointer;
|
|
typedef const nsLineBox* const_pointer;
|
|
|
|
typedef nsLineList_iterator iterator;
|
|
typedef nsLineList_reverse_iterator reverse_iterator;
|
|
typedef nsLineList_const_iterator const_iterator;
|
|
typedef nsLineList_const_reverse_iterator const_reverse_iterator;
|
|
|
|
nsLineList()
|
|
{
|
|
clear();
|
|
}
|
|
|
|
const_iterator begin() const
|
|
{
|
|
const_iterator rv;
|
|
rv.mCurrent = mLink._mNext;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
iterator begin()
|
|
{
|
|
iterator rv;
|
|
rv.mCurrent = mLink._mNext;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
const_iterator end() const
|
|
{
|
|
const_iterator rv;
|
|
rv.mCurrent = &mLink;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
iterator end()
|
|
{
|
|
iterator rv;
|
|
rv.mCurrent = &mLink;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
const_reverse_iterator rbegin() const
|
|
{
|
|
const_reverse_iterator rv;
|
|
rv.mCurrent = mLink._mPrev;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
reverse_iterator rbegin()
|
|
{
|
|
reverse_iterator rv;
|
|
rv.mCurrent = mLink._mPrev;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
const_reverse_iterator rend() const
|
|
{
|
|
const_reverse_iterator rv;
|
|
rv.mCurrent = &mLink;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
reverse_iterator rend()
|
|
{
|
|
reverse_iterator rv;
|
|
rv.mCurrent = &mLink;
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
rv.mListLink = &mLink;
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
PRBool empty() const
|
|
{
|
|
return mLink._mNext == &mLink;
|
|
}
|
|
|
|
// NOTE: O(N).
|
|
size_type size() const
|
|
{
|
|
size_type count = 0;
|
|
for (const link_type *cur = mLink._mNext;
|
|
cur != &mLink;
|
|
cur = cur->_mNext)
|
|
{
|
|
++count;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
pointer front()
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to return");
|
|
return NS_STATIC_CAST(pointer, mLink._mNext);
|
|
}
|
|
|
|
const_pointer front() const
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to return");
|
|
return NS_STATIC_CAST(const_pointer, mLink._mNext);
|
|
}
|
|
|
|
pointer back()
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to return");
|
|
return NS_STATIC_CAST(pointer, mLink._mPrev);
|
|
}
|
|
|
|
const_pointer back() const
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to return");
|
|
return NS_STATIC_CAST(const_pointer, mLink._mPrev);
|
|
}
|
|
|
|
void push_front(pointer aNew)
|
|
{
|
|
aNew->_mNext = mLink._mNext;
|
|
mLink._mNext->_mPrev = aNew;
|
|
aNew->_mPrev = &mLink;
|
|
mLink._mNext = aNew;
|
|
}
|
|
|
|
void pop_front()
|
|
// NOTE: leaves dangling next/prev pointers
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to pop");
|
|
link_type *newFirst = mLink._mNext->_mNext;
|
|
newFirst->_mPrev = &mLink;
|
|
// mLink._mNext->_mNext = nsnull;
|
|
// mLink._mNext->_mPrev = nsnull;
|
|
mLink._mNext = newFirst;
|
|
}
|
|
|
|
void push_back(pointer aNew)
|
|
{
|
|
aNew->_mPrev = mLink._mPrev;
|
|
mLink._mPrev->_mNext = aNew;
|
|
aNew->_mNext = &mLink;
|
|
mLink._mPrev = aNew;
|
|
}
|
|
|
|
void pop_back()
|
|
// NOTE: leaves dangling next/prev pointers
|
|
{
|
|
NS_ASSERTION(!empty(), "no element to pop");
|
|
link_type *newLast = mLink._mPrev->_mPrev;
|
|
newLast->_mNext = &mLink;
|
|
// mLink._mPrev->_mPrev = nsnull;
|
|
// mLink._mPrev->_mNext = nsnull;
|
|
mLink._mPrev = newLast;
|
|
}
|
|
|
|
// inserts x before position
|
|
iterator before_insert(iterator position, pointer x)
|
|
{
|
|
// use |mCurrent| to prevent DEBUG_PASS_END assertions
|
|
x->_mPrev = position.mCurrent->_mPrev;
|
|
x->_mNext = position.mCurrent;
|
|
position.mCurrent->_mPrev->_mNext = x;
|
|
position.mCurrent->_mPrev = x;
|
|
return --position;
|
|
}
|
|
|
|
// inserts x after position
|
|
iterator after_insert(iterator position, pointer x)
|
|
{
|
|
// use |mCurrent| to prevent DEBUG_PASS_END assertions
|
|
x->_mNext = position.mCurrent->_mNext;
|
|
x->_mPrev = position.mCurrent;
|
|
position.mCurrent->_mNext->_mPrev = x;
|
|
position.mCurrent->_mNext = x;
|
|
return ++position;
|
|
}
|
|
|
|
// returns iterator pointing to after the element
|
|
iterator erase(iterator position)
|
|
// NOTE: leaves dangling next/prev pointers
|
|
{
|
|
position->_mPrev->_mNext = position->_mNext;
|
|
position->_mNext->_mPrev = position->_mPrev;
|
|
return ++position;
|
|
}
|
|
|
|
void swap(self_type& y)
|
|
{
|
|
link_type tmp(y.mLink);
|
|
y.mLink = mLink;
|
|
mLink = tmp;
|
|
}
|
|
|
|
void clear()
|
|
// NOTE: leaves dangling next/prev pointers
|
|
{
|
|
mLink._mNext = &mLink;
|
|
mLink._mPrev = &mLink;
|
|
}
|
|
|
|
// inserts the conts of x before position and makes x empty
|
|
void splice(iterator position, self_type& x)
|
|
{
|
|
// use |mCurrent| to prevent DEBUG_PASS_END assertions
|
|
position.mCurrent->_mPrev->_mNext = x.mLink._mNext;
|
|
x.mLink._mNext->_mPrev = position.mCurrent->_mPrev;
|
|
x.mLink._mPrev->_mNext = position.mCurrent;
|
|
position.mCurrent->_mPrev = x.mLink._mPrev;
|
|
x.clear();
|
|
}
|
|
|
|
// Inserts element *i from list x before position and removes
|
|
// it from x.
|
|
void splice(iterator position, self_type& x, iterator i)
|
|
{
|
|
NS_ASSERTION(!x.empty(), "Can't insert from empty list.");
|
|
NS_ASSERTION(position != i && position.mCurrent != i->_mNext,
|
|
"We don't check for this case.");
|
|
|
|
// remove from |x|
|
|
i->_mPrev->_mNext = i->_mNext;
|
|
i->_mNext->_mPrev = i->_mPrev;
|
|
|
|
// use |mCurrent| to prevent DEBUG_PASS_END assertions
|
|
// link into |this|, before-side
|
|
i->_mPrev = position.mCurrent->_mPrev;
|
|
position.mCurrent->_mPrev->_mNext = i.get();
|
|
|
|
// link into |this|, after-side
|
|
i->_mNext = position.mCurrent;
|
|
position.mCurrent->_mPrev = i.get();
|
|
}
|
|
|
|
// Inserts elements in [|first|, |last|), which are in |x|,
|
|
// into |this| before |position| and removes them from |x|.
|
|
void splice(iterator position, self_type& x, iterator first,
|
|
iterator last)
|
|
{
|
|
NS_ASSERTION(!x.empty(), "Can't insert from empty list.");
|
|
|
|
if (first == last)
|
|
return;
|
|
|
|
--last; // so we now want to move [first, last]
|
|
// remove from |x|
|
|
first->_mPrev->_mNext = last->_mNext;
|
|
last->_mNext->_mPrev = first->_mPrev;
|
|
|
|
// use |mCurrent| to prevent DEBUG_PASS_END assertions
|
|
// link into |this|, before-side
|
|
first->_mPrev = position.mCurrent->_mPrev;
|
|
position.mCurrent->_mPrev->_mNext = first.get();
|
|
|
|
// link into |this|, after-side
|
|
last->_mNext = position.mCurrent;
|
|
position.mCurrent->_mPrev = last.get();
|
|
}
|
|
|
|
};
|
|
|
|
|
|
// Many of these implementations of operator= don't work yet. I don't
|
|
// know why.
|
|
|
|
#ifdef NS_LINELIST_DEBUG_PASS_END
|
|
|
|
// NOTE: ASSIGN_FROM is meant to be used *only* as the entire body
|
|
// of a function and therefore lacks PR_{BEGIN,END}_MACRO
|
|
#define ASSIGN_FROM(other_) \
|
|
mCurrent = other_.mCurrent; \
|
|
mListLink = other_.mListLink; \
|
|
return *this;
|
|
|
|
#else /* !NS_LINELIST_DEBUG_PASS_END */
|
|
|
|
#define ASSIGN_FROM(other_) \
|
|
mCurrent = other_.mCurrent; \
|
|
return *this;
|
|
|
|
#endif /* !NS_LINELIST_DEBUG_PASS_END */
|
|
|
|
inline
|
|
nsLineList_iterator&
|
|
nsLineList_iterator::operator=(const nsLineList_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_iterator&
|
|
nsLineList_iterator::operator=(const nsLineList_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_reverse_iterator&
|
|
nsLineList_reverse_iterator::operator=(const nsLineList_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_reverse_iterator&
|
|
nsLineList_reverse_iterator::operator=(const nsLineList_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_iterator&
|
|
nsLineList_const_iterator::operator=(const nsLineList_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_iterator&
|
|
nsLineList_const_iterator::operator=(const nsLineList_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_iterator&
|
|
nsLineList_const_iterator::operator=(const nsLineList_const_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_iterator&
|
|
nsLineList_const_iterator::operator=(const nsLineList_const_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_reverse_iterator&
|
|
nsLineList_const_reverse_iterator::operator=(const nsLineList_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_reverse_iterator&
|
|
nsLineList_const_reverse_iterator::operator=(const nsLineList_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_reverse_iterator&
|
|
nsLineList_const_reverse_iterator::operator=(const nsLineList_const_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
inline
|
|
nsLineList_const_reverse_iterator&
|
|
nsLineList_const_reverse_iterator::operator=(const nsLineList_const_reverse_iterator& aOther)
|
|
{
|
|
ASSIGN_FROM(aOther)
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
class nsLineIterator : public nsILineIteratorNavigator {
|
|
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,
|
|
#ifdef IBMBIDI
|
|
PRBool aCouldBeReordered,
|
|
#endif
|
|
nsIFrame** aFrameFound,
|
|
PRBool* aXIsBeforeFirstFrame,
|
|
PRBool* aXIsAfterLastFrame);
|
|
|
|
NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber);
|
|
#ifdef IBMBIDI
|
|
NS_IMETHOD CheckLineOrder(PRInt32 aLine,
|
|
PRBool *aIsReordered,
|
|
nsIFrame **aFirstVisual,
|
|
nsIFrame **aLastVisual);
|
|
#endif
|
|
nsresult Init(nsLineList& 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;
|
|
PRPackedBool mRightToLeft;
|
|
};
|
|
|
|
#endif /* nsLineBox_h___ */
|