LCOV - app.info - layout/base/nsStyleChangeList.cpp

LCOV - code coverage report
| Current view: | directory - layout/base - nsStyleChangeList.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 65 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 6 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
           2                 : /* ***** BEGIN LICENSE BLOCK *****
           3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           4                 :  *
           5                 :  * The contents of this file are subject to the Mozilla Public License Version
           6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           7                 :  * the License. You may obtain a copy of the License at
           8                 :  * http://www.mozilla.org/MPL/
           9                 :  *
          10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          12                 :  * for the specific language governing rights and limitations under the
          13                 :  * License.
          14                 :  *
          15                 :  * The Original Code is mozilla.org code.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is
          18                 :  * Netscape Communications Corporation.
          19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          20                 :  * the Initial Developer. All Rights Reserved.
          21                 :  *
          22                 :  * Contributor(s):
          23                 :  *
          24                 :  * Alternatively, the contents of this file may be used under the terms of
          25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          28                 :  * of those above. If you wish to allow use of your version of this file only
          29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          30                 :  * use your version of this file under the terms of the MPL, indicate your
          31                 :  * decision by deleting the provisions above and replace them with the notice
          32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          33                 :  * the provisions above, a recipient may use your version of this file under
          34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          35                 :  *
          36                 :  * ***** END LICENSE BLOCK ***** */
          37                 :
          38                 : /*
          39                 :  * a list of the recomputation that needs to be done in response to a
          40                 :  * style change
          41                 :  */
          42                 :
          43                 : #include "nsStyleChangeList.h"
          44                 : #include "nsStyleConsts.h"
          45                 : #include "nsIFrame.h"
          46                 : #include "nsIContent.h"
          47                 : #include "nsCRT.h"
          48                 :
          49                 : static const PRUint32 kGrowArrayBy = 10;
          50                 :
          51               0 : nsStyleChangeList::nsStyleChangeList()
          52                 :   : mArray(mBuffer),
          53                 :     mArraySize(kStyleChangeBufferSize),
          54               0 :     mCount(0)
          55                 : {
          56               0 :   MOZ_COUNT_CTOR(nsStyleChangeList);
          57               0 : }
          58                 :
          59               0 : nsStyleChangeList::~nsStyleChangeList()
          60                 : {
          61               0 :   MOZ_COUNT_DTOR(nsStyleChangeList);
          62               0 :   Clear();
          63               0 : }
          64                 :
          65                 : nsresult
          66               0 : nsStyleChangeList::ChangeAt(PRInt32 aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
          67                 :                             nsChangeHint& aHint) const
          68                 : {
          69               0 :   if ((0 <= aIndex) && (aIndex < mCount)) {
          70               0 :     aFrame = mArray[aIndex].mFrame;
          71               0 :     aContent = mArray[aIndex].mContent;
          72               0 :     aHint = mArray[aIndex].mHint;
          73               0 :     return NS_OK;
          74                 :   }
          75               0 :   return NS_ERROR_ILLEGAL_VALUE;
          76                 : }
          77                 :
          78                 : nsresult
          79               0 : nsStyleChangeList::ChangeAt(PRInt32 aIndex, const nsStyleChangeData** aChangeData) const
          80                 : {
          81               0 :   if ((0 <= aIndex) && (aIndex < mCount)) {
          82               0 :     *aChangeData = &mArray[aIndex];
          83               0 :     return NS_OK;
          84                 :   }
          85               0 :   return NS_ERROR_ILLEGAL_VALUE;
          86                 : }
          87                 :
          88                 : nsresult
          89               0 : nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint)
          90                 : {
          91               0 :   NS_ASSERTION(aFrame || (aHint & nsChangeHint_ReconstructFrame),
          92                 :                "must have frame");
          93               0 :   NS_ASSERTION(aContent || !(aHint & nsChangeHint_ReconstructFrame),
          94                 :                "must have content");
          95                 :   // XXXbz we should make this take Element instead of nsIContent
          96               0 :   NS_ASSERTION(!aContent || aContent->IsElement(),
          97                 :                "Shouldn't be trying to restyle non-elements directly");
          98               0 :   NS_ASSERTION(!(aHint & nsChangeHint_ReflowFrame) ||
          99                 :                (aHint & nsChangeHint_NeedReflow),
         100                 :                "Reflow hint bits set without actually asking for a reflow");
         101                 :
         102               0 :   if ((0 < mCount) && (aHint & nsChangeHint_ReconstructFrame)) { // filter out all other changes for same content
         103               0 :     if (aContent) {
         104               0 :       for (PRInt32 index = mCount - 1; index >= 0; --index) {
         105               0 :         if (aContent == mArray[index].mContent) { // remove this change
         106               0 :           aContent->Release();
         107               0 :           mCount--;
         108               0 :           if (index < mCount) { // move later changes down
         109               0 :             ::memmove(&mArray[index], &mArray[index + 1],
         110               0 :                       (mCount - index) * sizeof(nsStyleChangeData));
         111                 :           }
         112                 :         }
         113                 :       }
         114                 :     }
         115                 :   }
         116                 :
         117               0 :   PRInt32 last = mCount - 1;
         118               0 :   if ((0 < mCount) && aFrame && (aFrame == mArray[last].mFrame)) { // same as last frame
         119               0 :     NS_UpdateHint(mArray[last].mHint, aHint);
         120                 :   }
         121                 :   else {
         122               0 :     if (mCount == mArraySize) {
         123               0 :       PRInt32 newSize = mArraySize + kGrowArrayBy;
         124               0 :       nsStyleChangeData* newArray = new nsStyleChangeData[newSize];
         125               0 :       if (newArray) {
         126               0 :         memcpy(newArray, mArray, mCount * sizeof(nsStyleChangeData));
         127               0 :         if (mArray != mBuffer) {
         128               0 :           delete [] mArray;
         129                 :         }
         130               0 :         mArray = newArray;
         131               0 :         mArraySize = newSize;
         132                 :       }
         133                 :       else {
         134               0 :         return NS_ERROR_OUT_OF_MEMORY;
         135                 :       }
         136                 :     }
         137               0 :     mArray[mCount].mFrame = aFrame;
         138               0 :     mArray[mCount].mContent = aContent;
         139               0 :     if (aContent) {
         140               0 :       aContent->AddRef();
         141                 :     }
         142               0 :     mArray[mCount].mHint = aHint;
         143               0 :     mCount++;
         144                 :   }
         145               0 :   return NS_OK;
         146                 : }
         147                 :
         148                 : void
         149               0 : nsStyleChangeList::Clear()
         150                 : {
         151               0 :   for (PRInt32 index = mCount - 1; index >= 0; --index) {
         152               0 :     nsIContent* content = mArray[index].mContent;
         153               0 :     if (content) {
         154               0 :       content->Release();
         155                 :     }
         156                 :   }
         157               0 :   if (mArray != mBuffer) {
         158               0 :     delete [] mArray;
         159               0 :     mArray = mBuffer;
         160               0 :     mArraySize = kStyleChangeBufferSize;
         161                 :   }
         162               0 :   mCount = 0;
         163               0 : }
         164                 :

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