зеркало из https://github.com/mozilla/pjs.git
137 строки
4.3 KiB
C++
137 строки
4.3 KiB
C++
/* -*- 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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*
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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.org 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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*
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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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#include "nsStyleChangeList.h"
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#include "nsStyleConsts.h"
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#include "nsIFrame.h"
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#include "nsIContent.h"
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#include "nsCRT.h"
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static const PRUint32 kGrowArrayBy = 10;
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MOZ_DECL_CTOR_COUNTER(nsStyleChangeList)
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nsStyleChangeList::nsStyleChangeList(void)
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: mArray(mBuffer),
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mArraySize(kStyleChangeBufferSize),
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mCount(0)
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{
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MOZ_COUNT_CTOR(nsStyleChangeList);
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}
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nsStyleChangeList::~nsStyleChangeList(void)
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{
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MOZ_COUNT_DTOR(nsStyleChangeList);
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Clear();
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}
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nsresult
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nsStyleChangeList::ChangeAt(PRInt32 aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
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PRInt32& aHint) const
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{
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if ((0 <= aIndex) && (aIndex < mCount)) {
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aFrame = mArray[aIndex].mFrame;
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aContent = mArray[aIndex].mContent;
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aHint = mArray[aIndex].mHint;
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return NS_OK;
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}
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return NS_ERROR_ILLEGAL_VALUE;
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}
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nsresult
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nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent, PRInt32 aHint)
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{
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NS_ASSERTION(aFrame || (aHint >= NS_STYLE_HINT_FRAMECHANGE), "must have frame");
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NS_ASSERTION(aContent || (aHint < NS_STYLE_HINT_FRAMECHANGE), "must have content");
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if ((0 < mCount) && (NS_STYLE_HINT_FRAMECHANGE == aHint)) { // filter out all other changes for same content
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if (aContent) {
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PRInt32 index = mCount;
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while (0 < index--) {
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if (aContent == mArray[index].mContent) { // remove this change
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mCount--;
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if (index < mCount) { // move later changes down
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nsCRT::memcpy(&(mArray[index]), &(mArray[index + 1]),
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(mCount - index) * sizeof(nsStyleChangeData));
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}
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}
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}
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}
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}
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PRInt32 last = mCount - 1;
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if ((0 < mCount) && aFrame && (aFrame == mArray[last].mFrame)) { // same as last frame
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if (mArray[last].mHint < aHint) {
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mArray[last].mHint = aHint;
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}
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}
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else {
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if (mCount == mArraySize) {
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PRInt32 newSize = mArraySize + kGrowArrayBy;
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nsStyleChangeData* newArray = new nsStyleChangeData[newSize];
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if (newArray) {
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nsCRT::memcpy(newArray, mArray, mCount * sizeof(nsStyleChangeData));
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if (mArray != mBuffer) {
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delete [] mArray;
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}
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mArray = newArray;
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mArraySize = newSize;
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}
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else {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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mArray[mCount].mFrame = aFrame;
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mArray[mCount].mContent = aContent;
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mArray[mCount].mHint = aHint;
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mCount++;
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}
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return NS_OK;
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}
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void
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nsStyleChangeList::Clear()
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{
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if (mArray != mBuffer) {
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delete [] mArray;
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mArray = mBuffer;
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mArraySize = kStyleChangeBufferSize;
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}
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mCount = 0;
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}
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