зеркало из https://github.com/mozilla/pjs.git
134 строки
4.7 KiB
C
134 строки
4.7 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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* the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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* Timothy Nikkel <tnikkel@gmail.com>
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* Boris Zbarsky <bzbarsky@mit.edu>
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsAutoLayoutPhase_h
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#define nsAutoLayoutPhase_h
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#ifdef DEBUG
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#include "nsPresContext.h"
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#include "nsContentUtils.h"
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struct nsAutoLayoutPhase {
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nsAutoLayoutPhase(nsPresContext* aPresContext, nsLayoutPhase aPhase)
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: mPresContext(aPresContext), mPhase(aPhase), mCount(0)
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{
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Enter();
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}
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~nsAutoLayoutPhase()
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{
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Exit();
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NS_ASSERTION(mCount == 0, "imbalanced");
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}
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void Enter()
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{
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switch (mPhase) {
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case eLayoutPhase_Paint:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"recurring into paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"painting in the middle of reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"painting in the middle of frame construction");
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break;
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case eLayoutPhase_Reflow:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"reflowing in the middle of a paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"recurring into reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"reflowing in the middle of frame construction");
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break;
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case eLayoutPhase_FrameC:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"constructing frames in the middle of a paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"constructing frames in the middle of reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"recurring into frame construction");
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NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
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"constructing frames and scripts are not blocked");
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break;
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default:
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break;
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}
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++(mPresContext->mLayoutPhaseCount[mPhase]);
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++mCount;
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}
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void Exit()
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{
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NS_ASSERTION(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
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"imbalanced");
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--(mPresContext->mLayoutPhaseCount[mPhase]);
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--mCount;
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}
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private:
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nsPresContext* mPresContext;
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nsLayoutPhase mPhase;
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PRUint32 mCount;
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};
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#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
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nsAutoLayoutPhase autoLayoutPhase((pc_), (eLayoutPhase_##phase_))
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#define LAYOUT_PHASE_TEMP_EXIT() \
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PR_BEGIN_MACRO \
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autoLayoutPhase.Exit(); \
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PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_REENTER() \
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PR_BEGIN_MACRO \
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autoLayoutPhase.Enter(); \
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PR_END_MACRO
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#else
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#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
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PR_BEGIN_MACRO PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_EXIT() \
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PR_BEGIN_MACRO PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_REENTER() \
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PR_BEGIN_MACRO PR_END_MACRO
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#endif
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#endif // nsAutoLayoutPhase_h
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