зеркало из https://github.com/mozilla/pjs.git
134 строки
4.7 KiB
C++
134 строки
4.7 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* the Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2006
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
|
|
* Timothy Nikkel <tnikkel@gmail.com>
|
|
* Boris Zbarsky <bzbarsky@mit.edu>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef nsAutoLayoutPhase_h
|
|
#define nsAutoLayoutPhase_h
|
|
|
|
#ifdef DEBUG
|
|
|
|
#include "nsPresContext.h"
|
|
#include "nsContentUtils.h"
|
|
|
|
struct nsAutoLayoutPhase {
|
|
nsAutoLayoutPhase(nsPresContext* aPresContext, nsLayoutPhase aPhase)
|
|
: mPresContext(aPresContext), mPhase(aPhase), mCount(0)
|
|
{
|
|
Enter();
|
|
}
|
|
|
|
~nsAutoLayoutPhase()
|
|
{
|
|
Exit();
|
|
NS_ASSERTION(mCount == 0, "imbalanced");
|
|
}
|
|
|
|
void Enter()
|
|
{
|
|
switch (mPhase) {
|
|
case eLayoutPhase_Paint:
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
|
|
"recurring into paint");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
|
|
"painting in the middle of reflow");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
|
|
"painting in the middle of frame construction");
|
|
break;
|
|
case eLayoutPhase_Reflow:
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
|
|
"reflowing in the middle of a paint");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
|
|
"recurring into reflow");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
|
|
"reflowing in the middle of frame construction");
|
|
break;
|
|
case eLayoutPhase_FrameC:
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
|
|
"constructing frames in the middle of a paint");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
|
|
"constructing frames in the middle of reflow");
|
|
NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
|
|
"recurring into frame construction");
|
|
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
|
|
"constructing frames and scripts are not blocked");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
++(mPresContext->mLayoutPhaseCount[mPhase]);
|
|
++mCount;
|
|
}
|
|
|
|
void Exit()
|
|
{
|
|
NS_ASSERTION(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
|
|
"imbalanced");
|
|
--(mPresContext->mLayoutPhaseCount[mPhase]);
|
|
--mCount;
|
|
}
|
|
|
|
private:
|
|
nsPresContext* mPresContext;
|
|
nsLayoutPhase mPhase;
|
|
PRUint32 mCount;
|
|
};
|
|
|
|
#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
|
|
nsAutoLayoutPhase autoLayoutPhase((pc_), (eLayoutPhase_##phase_))
|
|
#define LAYOUT_PHASE_TEMP_EXIT() \
|
|
PR_BEGIN_MACRO \
|
|
autoLayoutPhase.Exit(); \
|
|
PR_END_MACRO
|
|
#define LAYOUT_PHASE_TEMP_REENTER() \
|
|
PR_BEGIN_MACRO \
|
|
autoLayoutPhase.Enter(); \
|
|
PR_END_MACRO
|
|
|
|
#else
|
|
|
|
#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
|
|
PR_BEGIN_MACRO PR_END_MACRO
|
|
#define LAYOUT_PHASE_TEMP_EXIT() \
|
|
PR_BEGIN_MACRO PR_END_MACRO
|
|
#define LAYOUT_PHASE_TEMP_REENTER() \
|
|
PR_BEGIN_MACRO PR_END_MACRO
|
|
|
|
#endif
|
|
|
|
#endif // nsAutoLayoutPhase_h
|