mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-29 21:25:35 +00:00
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/* -*- 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 "nsIDocument.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(nsIDocument* aDocument, nsUpdateType aUpdateType,
|
|
bool aNotify) :
|
|
mDocument(aNotify ? aDocument : nullptr),
|
|
mUpdateType(aUpdateType)
|
|
{
|
|
if (mDocument) {
|
|
mDocument->BeginUpdate(mUpdateType);
|
|
}
|
|
else {
|
|
nsContentUtils::AddScriptBlocker();
|
|
}
|
|
}
|
|
|
|
~mozAutoDocUpdate()
|
|
{
|
|
if (mDocument) {
|
|
mDocument->EndUpdate(mUpdateType);
|
|
}
|
|
else {
|
|
nsContentUtils::RemoveScriptBlocker();
|
|
}
|
|
}
|
|
|
|
private:
|
|
nsCOMPtr<nsIDocument> mDocument;
|
|
nsUpdateType mUpdateType;
|
|
};
|
|
|
|
#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,type,notify) \
|
|
mozAutoDocUpdate MOZ_AUTO_DOC_UPDATE_PASTE(_autoDocUpdater_, __LINE__) \
|
|
(doc,type,notify)
|
|
|
|
|
|
/**
|
|
* Creates an update batch only under certain conditions.
|
|
* Use this rather than mozAutoDocUpdate when you expect inner updates
|
|
* to notify but you don't always want to spec cycles creating a batch.
|
|
* This is needed to avoid having this batch always create a blocker,
|
|
* but then have inner mozAutoDocUpdate call the last EndUpdate before.
|
|
* we remove that blocker. See bug 423269.
|
|
*/
|
|
class MOZ_STACK_CLASS mozAutoDocConditionalContentUpdateBatch
|
|
{
|
|
public:
|
|
mozAutoDocConditionalContentUpdateBatch(nsIDocument* aDocument,
|
|
bool aNotify) :
|
|
mDocument(aNotify ? aDocument : nullptr)
|
|
{
|
|
if (mDocument) {
|
|
mDocument->BeginUpdate(UPDATE_CONTENT_MODEL);
|
|
}
|
|
}
|
|
|
|
~mozAutoDocConditionalContentUpdateBatch()
|
|
{
|
|
if (mDocument) {
|
|
mDocument->EndUpdate(UPDATE_CONTENT_MODEL);
|
|
}
|
|
}
|
|
|
|
private:
|
|
nsCOMPtr<nsIDocument> mDocument;
|
|
};
|
|
|
|
#endif
|