LCOV - code coverage report
Current view: directory - layout/base - nsAutoLayoutPhase.h (source / functions) Found Hit Coverage
Test: app.info Lines: 32 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is mozilla.org code.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * the Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2006
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
      23                 :  *   Timothy Nikkel <tnikkel@gmail.com>
      24                 :  *   Boris Zbarsky <bzbarsky@mit.edu>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef nsAutoLayoutPhase_h
      41                 : #define nsAutoLayoutPhase_h
      42                 : 
      43                 : #ifdef DEBUG
      44                 : 
      45                 : #include "nsPresContext.h"
      46                 : #include "nsContentUtils.h"
      47                 : 
      48                 : struct nsAutoLayoutPhase {
      49               0 :   nsAutoLayoutPhase(nsPresContext* aPresContext, nsLayoutPhase aPhase)
      50               0 :     : mPresContext(aPresContext), mPhase(aPhase), mCount(0)
      51                 :   {
      52               0 :     Enter();
      53               0 :   }
      54                 : 
      55               0 :   ~nsAutoLayoutPhase()
      56                 :   {
      57               0 :     Exit();
      58               0 :     NS_ASSERTION(mCount == 0, "imbalanced");
      59               0 :   }
      60                 : 
      61               0 :   void Enter()
      62                 :   {
      63               0 :     switch (mPhase) {
      64                 :       case eLayoutPhase_Paint:
      65               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
      66                 :                      "recurring into paint");
      67               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
      68                 :                      "painting in the middle of reflow");
      69               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
      70                 :                      "painting in the middle of frame construction");
      71               0 :         break;
      72                 :       case eLayoutPhase_Reflow:
      73               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
      74                 :                      "reflowing in the middle of a paint");
      75               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
      76                 :                      "recurring into reflow");
      77               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
      78                 :                      "reflowing in the middle of frame construction");
      79               0 :         break;
      80                 :       case eLayoutPhase_FrameC:
      81               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
      82                 :                      "constructing frames in the middle of a paint");
      83               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
      84                 :                      "constructing frames in the middle of reflow");
      85               0 :         NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
      86                 :                      "recurring into frame construction");
      87               0 :         NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
      88                 :                      "constructing frames and scripts are not blocked");
      89               0 :         break;
      90                 :       default:
      91               0 :         break;
      92                 :     }
      93               0 :     ++(mPresContext->mLayoutPhaseCount[mPhase]);
      94               0 :     ++mCount;
      95               0 :   }
      96                 : 
      97               0 :   void Exit()
      98                 :   {
      99               0 :     NS_ASSERTION(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
     100                 :                  "imbalanced");
     101               0 :     --(mPresContext->mLayoutPhaseCount[mPhase]);
     102               0 :     --mCount;
     103               0 :   }
     104                 : 
     105                 : private:
     106                 :   nsPresContext* mPresContext;
     107                 :   nsLayoutPhase mPhase;
     108                 :   PRUint32 mCount;
     109                 : };
     110                 : 
     111                 : #define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
     112                 :   nsAutoLayoutPhase autoLayoutPhase((pc_), (eLayoutPhase_##phase_))
     113                 : #define LAYOUT_PHASE_TEMP_EXIT() \
     114                 :   PR_BEGIN_MACRO \
     115                 :     autoLayoutPhase.Exit(); \
     116                 :   PR_END_MACRO
     117                 : #define LAYOUT_PHASE_TEMP_REENTER() \
     118                 :   PR_BEGIN_MACRO \
     119                 :     autoLayoutPhase.Enter(); \
     120                 :   PR_END_MACRO
     121                 : 
     122                 : #else
     123                 : 
     124                 : #define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
     125                 :   PR_BEGIN_MACRO PR_END_MACRO
     126                 : #define LAYOUT_PHASE_TEMP_EXIT() \
     127                 :   PR_BEGIN_MACRO PR_END_MACRO
     128                 : #define LAYOUT_PHASE_TEMP_REENTER() \
     129                 :   PR_BEGIN_MACRO PR_END_MACRO
     130                 : 
     131                 : #endif
     132                 : 
     133                 : #endif // nsAutoLayoutPhase_h

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