2001-09-29 00:14:13 +04:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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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1999-02-19 03:21:22 +03:00
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*
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2001-09-29 00:14:13 +04:00
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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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1999-02-19 03:21:22 +03:00
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*
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2001-09-29 00:14:13 +04:00
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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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1999-02-19 03:21:22 +03:00
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*
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* The Original Code is Mozilla Communicator client code.
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*
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2001-09-29 00:14:13 +04:00
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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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1999-11-06 06:40:37 +03:00
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*
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2001-09-29 00:14:13 +04:00
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* Contributor(s):
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2000-02-03 01:24:56 +03:00
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* Pierre Phaneuf <pp@ludusdesign.com>
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2001-09-29 00:14:13 +04:00
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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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1999-02-19 03:21:22 +03:00
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#include "nsFrameList.h"
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1999-11-02 01:12:45 +03:00
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#ifdef NS_DEBUG
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#include "nsIFrameDebug.h"
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#endif
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1999-02-19 03:21:22 +03:00
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2001-03-21 04:16:22 +03:00
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#ifdef IBMBIDI
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#include "nsCOMPtr.h"
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#include "nsLayoutAtoms.h"
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#include "nsILineIterator.h"
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2001-05-15 16:29:10 +04:00
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/**
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* Helper class for comparing the location of frames. Used by
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* GetPrevVisualFor() and GetNextVisualFor()
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*/
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#define LINE_MIN 0
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#define XCOORD_MIN 0x80000000
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2001-05-15 18:34:23 +04:00
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#define MY_LINE_MAX 0x7fffffff
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2001-05-15 16:29:10 +04:00
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#define XCOORD_MAX 0x7fffffff
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class nsFrameOrigin {
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public:
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// default constructor
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nsFrameOrigin() {
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mLine = 0;
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mXCoord = 0;
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}
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nsFrameOrigin(PRInt32 line, nscoord xCoord) {
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mLine = line;
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mXCoord = xCoord;
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}
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// copy constructor
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nsFrameOrigin(const nsFrameOrigin& aFrameOrigin) {
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mLine = aFrameOrigin.mLine;
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mXCoord = aFrameOrigin.mXCoord;
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}
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~nsFrameOrigin() {
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}
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nsFrameOrigin& operator=(const nsFrameOrigin& aFrameOrigin) {
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mLine = aFrameOrigin.mLine;
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mXCoord = aFrameOrigin.mXCoord;
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return *this;
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}
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PRBool operator<(const nsFrameOrigin& aFrameOrigin) {
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if (mLine < aFrameOrigin.mLine) {
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return PR_TRUE;
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}
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if (mLine > aFrameOrigin.mLine) {
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return PR_FALSE;
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}
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if (mXCoord < aFrameOrigin.mXCoord) {
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool operator>(const nsFrameOrigin& aFrameOrigin) {
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if (mLine > aFrameOrigin.mLine) {
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return PR_TRUE;
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}
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if (mLine < aFrameOrigin.mLine) {
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return PR_FALSE;
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}
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if (mXCoord > aFrameOrigin.mXCoord) {
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool operator==(const nsFrameOrigin& aFrameOrigin) {
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if (aFrameOrigin.mLine == mLine && aFrameOrigin.mXCoord == mXCoord) {
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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protected:
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PRInt32 mLine;
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nscoord mXCoord;
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};
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2001-03-21 04:16:22 +03:00
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#endif // IBMBIDI
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1999-02-19 03:21:22 +03:00
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void
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1999-11-24 09:03:41 +03:00
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nsFrameList::DestroyFrames(nsIPresContext* aPresContext)
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1999-02-19 03:21:22 +03:00
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{
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrame* next;
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frame->GetNextSibling(&next);
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1999-07-22 06:24:52 +04:00
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frame->Destroy(aPresContext);
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1999-02-19 03:21:22 +03:00
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mFirstChild = frame = next;
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}
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}
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void
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nsFrameList::AppendFrames(nsIFrame* aParent, nsIFrame* aFrameList)
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{
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NS_PRECONDITION(nsnull != aFrameList, "null ptr");
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if (nsnull != aFrameList) {
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nsIFrame* lastChild = LastChild();
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if (nsnull == lastChild) {
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mFirstChild = aFrameList;
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}
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else {
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lastChild->SetNextSibling(aFrameList);
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}
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if (nsnull != aParent) {
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nsIFrame* frame = aFrameList;
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while (nsnull != frame) {
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frame->SetParent(aParent);
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frame->GetNextSibling(&frame);
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}
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}
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}
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}
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void
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nsFrameList::AppendFrame(nsIFrame* aParent, nsIFrame* aFrame)
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (nsnull != aFrame) {
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nsIFrame* lastChild = LastChild();
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if (nsnull == lastChild) {
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mFirstChild = aFrame;
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}
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else {
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lastChild->SetNextSibling(aFrame);
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}
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if (nsnull != aParent) {
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aFrame->SetParent(aParent);
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}
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}
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}
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PRBool
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nsFrameList::RemoveFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (nsnull != aFrame) {
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nsIFrame* nextFrame;
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aFrame->GetNextSibling(&nextFrame);
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aFrame->SetNextSibling(nsnull);
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if (aFrame == mFirstChild) {
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mFirstChild = nextFrame;
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return PR_TRUE;
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}
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else {
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nsIFrame* prevSibling = GetPrevSiblingFor(aFrame);
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if (nsnull != prevSibling) {
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prevSibling->SetNextSibling(nextFrame);
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return PR_TRUE;
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}
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}
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}
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2002-03-04 18:48:56 +03:00
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// aFrame was not in the list.
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1999-02-19 03:21:22 +03:00
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return PR_FALSE;
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}
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PRBool
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nsFrameList::RemoveFirstChild()
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{
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if (nsnull != mFirstChild) {
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nsIFrame* nextFrame;
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mFirstChild->GetNextSibling(&nextFrame);
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mFirstChild->SetNextSibling(nsnull);
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mFirstChild = nextFrame;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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1999-11-24 09:03:41 +03:00
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nsFrameList::DestroyFrame(nsIPresContext* aPresContext, nsIFrame* aFrame)
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1999-02-19 03:21:22 +03:00
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (RemoveFrame(aFrame)) {
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1999-07-22 06:24:52 +04:00
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aFrame->Destroy(aPresContext);
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1999-02-19 03:21:22 +03:00
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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void
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nsFrameList::InsertFrame(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aNewFrame)
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{
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if (nsnull != aNewFrame) {
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if (nsnull == aPrevSibling) {
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aNewFrame->SetNextSibling(mFirstChild);
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mFirstChild = aNewFrame;
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}
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else {
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nsIFrame* nextFrame;
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aPrevSibling->GetNextSibling(&nextFrame);
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aPrevSibling->SetNextSibling(aNewFrame);
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aNewFrame->SetNextSibling(nextFrame);
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}
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if (nsnull != aParent) {
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aNewFrame->SetParent(aParent);
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}
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}
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}
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void
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nsFrameList::InsertFrames(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aFrameList)
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{
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NS_PRECONDITION(nsnull != aFrameList, "null ptr");
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if (nsnull != aFrameList) {
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2000-03-12 06:07:52 +03:00
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nsIFrame* lastNewFrame = nsnull;
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1999-02-19 03:21:22 +03:00
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if (nsnull != aParent) {
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nsIFrame* frame = aFrameList;
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while (nsnull != frame) {
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frame->SetParent(aParent);
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2000-03-12 06:07:52 +03:00
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lastNewFrame = frame;
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1999-02-19 03:21:22 +03:00
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frame->GetNextSibling(&frame);
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}
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}
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2000-03-12 06:07:52 +03:00
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// Get the last new frame if necessary
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if (!lastNewFrame) {
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nsFrameList tmp(aFrameList);
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lastNewFrame = tmp.LastChild();
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}
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// Link the new frames into the child list
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1999-02-19 03:21:22 +03:00
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if (nsnull == aPrevSibling) {
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lastNewFrame->SetNextSibling(mFirstChild);
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mFirstChild = aFrameList;
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}
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else {
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nsIFrame* nextFrame;
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aPrevSibling->GetNextSibling(&nextFrame);
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aPrevSibling->SetNextSibling(aFrameList);
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lastNewFrame->SetNextSibling(nextFrame);
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}
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}
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}
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PRBool
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nsFrameList::ReplaceFrame(nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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NS_PRECONDITION(nsnull != aOldFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if ((nsnull != aOldFrame) && (nsnull != aNewFrame)) {
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nsIFrame* nextFrame;
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aOldFrame->GetNextSibling(&nextFrame);
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if (aOldFrame == mFirstChild) {
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mFirstChild = aNewFrame;
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aNewFrame->SetNextSibling(nextFrame);
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}
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else {
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nsIFrame* prevSibling = GetPrevSiblingFor(aOldFrame);
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if (nsnull != prevSibling) {
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prevSibling->SetNextSibling(aNewFrame);
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aNewFrame->SetNextSibling(nextFrame);
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}
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}
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if (nsnull != aParent) {
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aNewFrame->SetParent(aParent);
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}
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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1999-11-24 09:03:41 +03:00
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nsFrameList::ReplaceAndDestroyFrame(nsIPresContext* aPresContext,
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1999-07-22 08:00:57 +04:00
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nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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1999-02-19 03:21:22 +03:00
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{
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NS_PRECONDITION(nsnull != aOldFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if (ReplaceFrame(aParent, aOldFrame, aNewFrame)) {
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1999-07-22 06:24:52 +04:00
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aNewFrame->Destroy(aPresContext);
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1999-02-19 03:21:22 +03:00
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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nsFrameList::Split(nsIFrame* aAfterFrame, nsIFrame** aNextFrameResult)
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{
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NS_PRECONDITION(nsnull != aAfterFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNextFrameResult, "null ptr");
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NS_ASSERTION(ContainsFrame(aAfterFrame), "split after unknown frame");
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if ((nsnull != aNextFrameResult) && (nsnull != aAfterFrame)) {
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nsIFrame* nextFrame;
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aAfterFrame->GetNextSibling(&nextFrame);
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aAfterFrame->SetNextSibling(nsnull);
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*aNextFrameResult = nextFrame;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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nsIFrame*
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nsFrameList::PullFrame(nsIFrame* aParent,
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nsIFrame* aLastChild,
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nsFrameList& aFromList)
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{
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NS_PRECONDITION(nsnull != aParent, "null ptr");
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nsIFrame* pulledFrame = nsnull;
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if (nsnull != aParent) {
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pulledFrame = aFromList.FirstChild();
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if (nsnull != pulledFrame) {
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// Take frame off old list
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|
|
|
aFromList.RemoveFirstChild();
|
|
|
|
|
|
|
|
// Put it on the end of this list
|
|
|
|
if (nsnull == aLastChild) {
|
|
|
|
NS_ASSERTION(nsnull == mFirstChild, "bad aLastChild");
|
|
|
|
mFirstChild = pulledFrame;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
aLastChild->SetNextSibling(pulledFrame);
|
|
|
|
}
|
|
|
|
pulledFrame->SetParent(aParent);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return pulledFrame;
|
|
|
|
}
|
|
|
|
|
|
|
|
nsIFrame*
|
|
|
|
nsFrameList::LastChild() const
|
|
|
|
{
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
|
|
|
nsIFrame* next;
|
|
|
|
frame->GetNextSibling(&next);
|
|
|
|
if (nsnull == next) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
frame = next;
|
|
|
|
}
|
|
|
|
return frame;
|
|
|
|
}
|
|
|
|
|
|
|
|
nsIFrame*
|
|
|
|
nsFrameList::FrameAt(PRInt32 aIndex) const
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(aIndex >= 0, "invalid arg");
|
|
|
|
if (aIndex < 0) return nsnull;
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while ((aIndex-- > 0) && (nsnull != frame)) {
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return frame;
|
|
|
|
}
|
|
|
|
|
|
|
|
PRBool
|
|
|
|
nsFrameList::ContainsFrame(const nsIFrame* aFrame) const
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(nsnull != aFrame, "null ptr");
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
|
|
|
if (frame == aFrame) {
|
|
|
|
return PR_TRUE;
|
|
|
|
}
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return PR_FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
PRInt32
|
|
|
|
nsFrameList::GetLength() const
|
|
|
|
{
|
|
|
|
PRInt32 count = 0;
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
|
|
|
count++;
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
nsIFrame*
|
|
|
|
nsFrameList::GetPrevSiblingFor(nsIFrame* aFrame) const
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(nsnull != aFrame, "null ptr");
|
|
|
|
if (aFrame == mFirstChild) {
|
|
|
|
return nsnull;
|
|
|
|
}
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
|
|
|
nsIFrame* next;
|
|
|
|
frame->GetNextSibling(&next);
|
|
|
|
if (next == aFrame) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
frame = next;
|
|
|
|
}
|
|
|
|
return frame;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nsFrameList::VerifyParent(nsIFrame* aParent) const
|
|
|
|
{
|
|
|
|
#ifdef NS_DEBUG
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
|
|
|
nsIFrame* parent;
|
|
|
|
frame->GetParent(&parent);
|
|
|
|
NS_ASSERTION(parent == aParent, "bad parent");
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
1999-11-02 01:12:45 +03:00
|
|
|
#ifdef NS_DEBUG
|
1999-02-19 03:21:22 +03:00
|
|
|
void
|
1999-10-26 08:44:41 +04:00
|
|
|
nsFrameList::List(nsIPresContext* aPresContext, FILE* out) const
|
1999-02-19 03:21:22 +03:00
|
|
|
{
|
|
|
|
fputs("<\n", out);
|
|
|
|
nsIFrame* frame = mFirstChild;
|
|
|
|
while (nsnull != frame) {
|
1999-11-02 01:12:45 +03:00
|
|
|
nsIFrameDebug* frameDebug;
|
|
|
|
|
2000-02-03 01:24:56 +03:00
|
|
|
if (NS_SUCCEEDED(frame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
|
1999-11-02 01:12:45 +03:00
|
|
|
frameDebug->List(aPresContext, out, 1);
|
|
|
|
}
|
1999-02-19 03:21:22 +03:00
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
1999-03-24 18:40:44 +03:00
|
|
|
fputs(">\n", out);
|
1999-02-19 03:21:22 +03:00
|
|
|
}
|
1999-11-02 01:12:45 +03:00
|
|
|
#endif
|
2001-03-21 04:16:22 +03:00
|
|
|
|
|
|
|
#ifdef IBMBIDI
|
|
|
|
nsIFrame*
|
|
|
|
nsFrameList::GetPrevVisualFor(nsIFrame* aFrame) const
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(nsnull != aFrame, "null ptr");
|
|
|
|
nsILineIterator* iter;
|
|
|
|
nsCOMPtr<nsIAtom>atom;
|
|
|
|
|
|
|
|
aFrame->GetFrameType(getter_AddRefs(atom));
|
|
|
|
if (atom.get() == nsLayoutAtoms::blockFrame)
|
|
|
|
return GetPrevSiblingFor(aFrame);
|
|
|
|
|
|
|
|
nsRect tempRect;
|
|
|
|
nsIFrame* blockFrame;
|
|
|
|
nsIFrame* frame;
|
|
|
|
nsIFrame* furthestFrame = nsnull;
|
|
|
|
|
|
|
|
frame = mFirstChild;
|
|
|
|
|
|
|
|
nsresult result = aFrame->GetParent(&blockFrame);
|
|
|
|
if (NS_FAILED(result) || !blockFrame)
|
|
|
|
return GetPrevSiblingFor(aFrame);
|
|
|
|
result = blockFrame->QueryInterface(NS_GET_IID(nsILineIterator), (void**)&iter);
|
|
|
|
if (NS_FAILED(result) || !iter) { // If the parent is not a block frame, just check all the siblings
|
|
|
|
|
|
|
|
PRInt32 maxX, limX;
|
|
|
|
maxX = -0x7fffffff;
|
|
|
|
aFrame->GetRect(tempRect);
|
|
|
|
limX = tempRect.x;
|
|
|
|
while (frame) {
|
|
|
|
frame->GetRect(tempRect);
|
|
|
|
if (tempRect.x > maxX && tempRect.x < limX) { // we are looking for the highest value less than the current one
|
|
|
|
maxX = tempRect.x;
|
|
|
|
furthestFrame = frame;
|
|
|
|
}
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return furthestFrame;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// Otherwise use the LineIterator to check the siblings on this line and the previous line
|
|
|
|
if (!blockFrame || !iter)
|
|
|
|
return nsnull;
|
|
|
|
|
2001-05-15 16:29:10 +04:00
|
|
|
nsFrameOrigin maxOrig(LINE_MIN, XCOORD_MIN);
|
2001-03-21 04:16:22 +03:00
|
|
|
PRInt32 testLine, thisLine;
|
|
|
|
|
|
|
|
aFrame->GetRect(tempRect);
|
|
|
|
result = iter->FindLineContaining(aFrame, &thisLine);
|
|
|
|
if (NS_FAILED(result) || thisLine < 0)
|
|
|
|
return nsnull;
|
|
|
|
|
2001-05-15 16:29:10 +04:00
|
|
|
nsFrameOrigin limOrig(thisLine, tempRect.x);
|
2001-03-21 04:16:22 +03:00
|
|
|
|
|
|
|
while (frame) {
|
|
|
|
if (NS_SUCCEEDED(iter->FindLineContaining(frame, &testLine))
|
|
|
|
&& testLine >= 0
|
|
|
|
&& (testLine == thisLine || testLine == thisLine - 1)) {
|
|
|
|
frame->GetRect(tempRect);
|
2001-05-15 16:29:10 +04:00
|
|
|
nsFrameOrigin testOrig(testLine, tempRect.x);
|
|
|
|
if (testOrig > maxOrig && testOrig < limOrig) { // we are looking for the highest value less than the current one
|
2001-03-21 04:16:22 +03:00
|
|
|
maxOrig = testOrig;
|
|
|
|
furthestFrame = frame;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return furthestFrame;
|
|
|
|
}
|
|
|
|
|
|
|
|
nsIFrame*
|
|
|
|
nsFrameList::GetNextVisualFor(nsIFrame* aFrame) const
|
|
|
|
{
|
|
|
|
NS_PRECONDITION(nsnull != aFrame, "null ptr");
|
|
|
|
nsILineIterator* iter;
|
|
|
|
nsCOMPtr<nsIAtom>atom;
|
|
|
|
|
|
|
|
aFrame->GetFrameType(getter_AddRefs(atom));
|
|
|
|
if (atom.get() == nsLayoutAtoms::blockFrame) {
|
|
|
|
nsIFrame* frame;
|
|
|
|
aFrame->GetNextSibling(&frame);
|
|
|
|
return frame;
|
|
|
|
}
|
|
|
|
|
|
|
|
nsRect tempRect;
|
|
|
|
nsIFrame* blockFrame;
|
|
|
|
nsIFrame* frame;
|
|
|
|
nsIFrame* nearestFrame = nsnull;
|
|
|
|
|
|
|
|
frame = mFirstChild;
|
|
|
|
|
|
|
|
nsresult result = aFrame->GetParent(&blockFrame);
|
|
|
|
if (NS_FAILED(result) || !blockFrame)
|
|
|
|
return GetPrevSiblingFor(aFrame);
|
|
|
|
result = blockFrame->QueryInterface(NS_GET_IID(nsILineIterator), (void**)&iter);
|
|
|
|
if (NS_FAILED(result) || !iter) { // If the parent is not a block frame, just check all the siblings
|
|
|
|
|
|
|
|
PRInt32 minX, limX;
|
|
|
|
minX = 0x7fffffff;
|
|
|
|
aFrame->GetRect(tempRect);
|
|
|
|
limX = tempRect.x;
|
|
|
|
while (frame) {
|
|
|
|
frame->GetRect(tempRect);
|
|
|
|
if (tempRect.x < minX && tempRect.x > limX) { // we are looking for the lowest value greater than the current one
|
|
|
|
minX = tempRect.x;
|
|
|
|
nearestFrame = frame;
|
|
|
|
}
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return nearestFrame;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// Otherwise use the LineIterator to check the siblings on this line and the previous line
|
|
|
|
if (!blockFrame || !iter)
|
|
|
|
return nsnull;
|
|
|
|
|
2001-05-15 18:34:23 +04:00
|
|
|
nsFrameOrigin minOrig(MY_LINE_MAX, XCOORD_MAX);
|
2001-03-21 04:16:22 +03:00
|
|
|
PRInt32 testLine, thisLine;
|
|
|
|
|
|
|
|
aFrame->GetRect(tempRect);
|
|
|
|
result = iter->FindLineContaining(aFrame, &thisLine);
|
|
|
|
if (NS_FAILED(result) || thisLine < 0)
|
|
|
|
return nsnull;
|
|
|
|
|
2001-05-15 16:29:10 +04:00
|
|
|
nsFrameOrigin limOrig(thisLine, tempRect.x);
|
2001-03-21 04:16:22 +03:00
|
|
|
|
|
|
|
while (frame) {
|
|
|
|
if (NS_SUCCEEDED(iter->FindLineContaining(frame, &testLine))
|
|
|
|
&& testLine >= 0
|
|
|
|
&& (testLine == thisLine || testLine == thisLine + 1)) {
|
|
|
|
frame->GetRect(tempRect);
|
2001-05-15 16:29:10 +04:00
|
|
|
nsFrameOrigin testOrig(testLine, tempRect.x);
|
|
|
|
if (testOrig < minOrig && testOrig > limOrig) { // we are looking for the lowest value greater than the current one
|
2001-03-21 04:16:22 +03:00
|
|
|
minOrig = testOrig;
|
|
|
|
nearestFrame = frame;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
frame->GetNextSibling(&frame);
|
|
|
|
}
|
|
|
|
return nearestFrame;
|
|
|
|
}
|
|
|
|
#endif
|