1 files changed, 59 insertions, 0 deletions
diff --git a/dom/xml/nsXMLPrettyPrinter.h b/dom/xml/nsXMLPrettyPrinter.h
new file mode 100644
index 0000000000..04835666dd
--- /dev/null
+++ b/dom/xml/nsXMLPrettyPrinter.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 nsXMLPrettyPrinter_h__
+#define nsXMLPrettyPrinter_h__
+
+#include "nsStubDocumentObserver.h"
+#include "nsCOMPtr.h"
+
+class nsXMLPrettyPrinter : public nsStubDocumentObserver {
+ public:
+  nsXMLPrettyPrinter();
+
+  NS_DECL_ISUPPORTS
+
+  // nsIMutationObserver
+  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+  NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
+
+  /**
+   * This will prettyprint the document if the document is loaded in a
+   * displayed window.
+   *
+   * @param aDocument  document to prettyprint
+   * @param [out] aDidPrettyPrint if true, and error not returned, actually
+   *              went ahead with prettyprinting the document.
+   */
+  nsresult PrettyPrint(mozilla::dom::Document* aDocument,
+                       bool* aDidPrettyPrint);
+
+  /**
+   * Unhook the prettyprinter
+   */
+  void Unhook();
+
+ private:
+  virtual ~nsXMLPrettyPrinter();
+
+  /**
+   * Signals for unhooking by setting mUnhookPending if the node changed is
+   * not in the shadow root tree nor in anonymous content.
+   *
+   * @param aContent  content that has changed
+   */
+  void MaybeUnhook(nsIContent* aContent);
+
+  mozilla::dom::Document*
+      mDocument;  // weak. Set as long as we're observing the document
+  bool mUnhookPending;
+};
+
+nsresult NS_NewXMLPrettyPrinter(nsXMLPrettyPrinter** aPrinter);
+
+#endif  // nsXMLPrettyPrinter_h__