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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozAutoDocUpdate_h_
#define mozAutoDocUpdate_h_
#include "nsContentUtils.h" // For AddScriptBlocker() and RemoveScriptBlocker().
#include "mozilla/dom/Document.h"
#include "nsIDocumentObserver.h"
/**
* Helper class to automatically handle batching of document updates. This
* class will call BeginUpdate on construction and EndUpdate on destruction on
* the given document with the given update type. The document could be null,
* in which case no updates will be called. The constructor also takes a
* boolean that can be set to false to prevent notifications.
*/
class MOZ_STACK_CLASS mozAutoDocUpdate {
public:
mozAutoDocUpdate(mozilla::dom::Document* aDocument, bool aNotify)
: mDocument(aNotify ? aDocument : nullptr) {
if (mDocument) {
mDocument->BeginUpdate();
} else {
nsContentUtils::AddScriptBlocker();
}
}
~mozAutoDocUpdate() {
if (mDocument) {
mDocument->EndUpdate();
} else {
nsContentUtils::RemoveScriptBlocker();
}
}
private:
RefPtr<mozilla::dom::Document> mDocument;
};
#define MOZ_AUTO_DOC_UPDATE_PASTE2(tok, line) tok##line
#define MOZ_AUTO_DOC_UPDATE_PASTE(tok, line) \
MOZ_AUTO_DOC_UPDATE_PASTE2(tok, line)
#define MOZ_AUTO_DOC_UPDATE(doc, notify) \
mozAutoDocUpdate MOZ_AUTO_DOC_UPDATE_PASTE(_autoDocUpdater_, __LINE__)( \
doc, notify)
#endif
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