Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/dom/base/mozAutoDocUpdate.h b/dom/base/mozAutoDocUpdate.h
new file mode 100644
index 0000000000..0b210c3dda
--- /dev/null
+++ b/dom/base/mozAutoDocUpdate.h
@@ -0,0 +1,51 @@
+/* -*- 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