зеркало из https://github.com/mozilla/pjs.git
119 строки
4.0 KiB
C++
119 строки
4.0 KiB
C++
/* ***** 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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* Boris Zbarsky <bzbarsky@mit.edu>.
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* Portions created by the Initial Developer are Copyright (C) 2003
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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 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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/**
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* Helper class to automatically handle batching of document updates. This
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* class will call BeginUpdate on construction and EndUpdate on destruction on
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* the given document with the given update type. The document could be null,
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* in which case no updates will be called. The constructor also takes a
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* boolean that can be set to false to prevent notifications.
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*/
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class NS_STACK_CLASS mozAutoDocUpdate
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{
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public:
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mozAutoDocUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType,
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PRBool aNotify) :
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mDocument(aNotify ? aDocument : nsnull),
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mUpdateType(aUpdateType)
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{
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if (mDocument) {
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mDocument->BeginUpdate(mUpdateType);
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}
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else if (aUpdateType == UPDATE_CONTENT_MODEL) {
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nsContentUtils::AddRemovableScriptBlocker();
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}
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else {
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nsContentUtils::AddScriptBlocker();
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}
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}
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~mozAutoDocUpdate()
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{
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if (mDocument) {
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mDocument->EndUpdate(mUpdateType);
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}
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else if (mUpdateType == UPDATE_CONTENT_MODEL) {
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nsContentUtils::RemoveRemovableScriptBlocker();
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}
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else {
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nsContentUtils::RemoveScriptBlocker();
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}
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}
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private:
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nsCOMPtr<nsIDocument> mDocument;
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nsUpdateType mUpdateType;
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};
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#define MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line) tok##line
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#define MOZ_AUTO_DOC_UPDATE_PASTE(tok,line) \
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MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line)
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#define MOZ_AUTO_DOC_UPDATE(doc,type,notify) \
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mozAutoDocUpdate MOZ_AUTO_DOC_UPDATE_PASTE(_autoDocUpdater_, __LINE__) \
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(doc,type,notify)
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/**
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* Creates an update batch only under certain conditions.
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* Use this rather than mozAutoDocUpdate when you expect inner updates
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* to notify but you don't always want to spec cycles creating a batch.
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* This is needed to avoid having this batch always create a blocker,
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* but then have inner mozAutoDocUpdate call the last EndUpdate before.
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* we remove that blocker. See bug 423269.
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*/
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class NS_STACK_CLASS mozAutoDocConditionalContentUpdateBatch
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{
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public:
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mozAutoDocConditionalContentUpdateBatch(nsIDocument* aDocument,
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PRBool aNotify) :
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mDocument(aNotify ? aDocument : nsnull)
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{
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if (mDocument) {
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mDocument->BeginUpdate(UPDATE_CONTENT_MODEL);
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}
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}
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~mozAutoDocConditionalContentUpdateBatch()
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{
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if (mDocument) {
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mDocument->EndUpdate(UPDATE_CONTENT_MODEL);
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}
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}
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private:
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nsCOMPtr<nsIDocument> mDocument;
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};
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