1 files changed, 157 insertions, 0 deletions
diff --git a/editor/libeditor/StyleSheetTransactions.cpp b/editor/libeditor/StyleSheetTransactions.cpp
new file mode 100644
index 000000000..6a31a16e2
--- /dev/null
+++ b/editor/libeditor/StyleSheetTransactions.cpp
@@ -0,0 +1,157 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#include "StyleSheetTransactions.h"
+
+#include <stddef.h>                     // for nullptr
+
+#include "nsAString.h"
+#include "nsCOMPtr.h"                   // for nsCOMPtr, do_QueryInterface, etc.
+#include "mozilla/StyleSheet.h"   // for mozilla::StyleSheet
+#include "mozilla/StyleSheetInlines.h"
+#include "nsDebug.h"                    // for NS_ENSURE_TRUE
+#include "nsError.h"                    // for NS_OK, etc.
+#include "nsIDOMDocument.h"             // for nsIDOMDocument
+#include "nsIDocument.h"                // for nsIDocument
+#include "nsIDocumentObserver.h"        // for UPDATE_STYLE
+#include "nsIEditor.h"                  // for nsIEditor
+
+namespace mozilla {
+
+static void
+AddStyleSheet(nsIEditor* aEditor, StyleSheet* aSheet)
+{
+  nsCOMPtr<nsIDOMDocument> domDoc;
+  aEditor->GetDocument(getter_AddRefs(domDoc));
+  nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
+  if (doc) {
+    doc->BeginUpdate(UPDATE_STYLE);
+    doc->AddStyleSheet(aSheet);
+    doc->EndUpdate(UPDATE_STYLE);
+  }
+}
+
+static void
+RemoveStyleSheet(nsIEditor* aEditor, StyleSheet* aSheet)
+{
+  nsCOMPtr<nsIDOMDocument> domDoc;
+  aEditor->GetDocument(getter_AddRefs(domDoc));
+  nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
+  if (doc) {
+    doc->BeginUpdate(UPDATE_STYLE);
+    doc->RemoveStyleSheet(aSheet);
+    doc->EndUpdate(UPDATE_STYLE);
+  }
+}
+
+/******************************************************************************
+ * AddStyleSheetTransaction
+ ******************************************************************************/
+
+AddStyleSheetTransaction::AddStyleSheetTransaction()
+  : mEditor(nullptr)
+{
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(AddStyleSheetTransaction,
+                                   EditTransactionBase,
+                                   mSheet)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AddStyleSheetTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+
+NS_IMETHODIMP
+AddStyleSheetTransaction::Init(nsIEditor* aEditor,
+                               StyleSheet* aSheet)
+{
+  NS_ENSURE_TRUE(aEditor && aSheet, NS_ERROR_INVALID_ARG);
+
+  mEditor = aEditor;
+  mSheet = aSheet;
+
+  return NS_OK;
+}
+
+
+NS_IMETHODIMP
+AddStyleSheetTransaction::DoTransaction()
+{
+  NS_ENSURE_TRUE(mEditor && mSheet, NS_ERROR_NOT_INITIALIZED);
+
+  AddStyleSheet(mEditor, mSheet);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+AddStyleSheetTransaction::UndoTransaction()
+{
+  NS_ENSURE_TRUE(mEditor && mSheet, NS_ERROR_NOT_INITIALIZED);
+
+  RemoveStyleSheet(mEditor, mSheet);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+AddStyleSheetTransaction::GetTxnDescription(nsAString& aString)
+{
+  aString.AssignLiteral("AddStyleSheetTransaction");
+  return NS_OK;
+}
+
+/******************************************************************************
+ * RemoveStyleSheetTransaction
+ ******************************************************************************/
+
+RemoveStyleSheetTransaction::RemoveStyleSheetTransaction()
+  : mEditor(nullptr)
+{
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(RemoveStyleSheetTransaction,
+                                   EditTransactionBase,
+                                   mSheet)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(RemoveStyleSheetTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+
+NS_IMETHODIMP
+RemoveStyleSheetTransaction::Init(nsIEditor* aEditor,
+                                  StyleSheet* aSheet)
+{
+  NS_ENSURE_TRUE(aEditor && aSheet, NS_ERROR_INVALID_ARG);
+
+  mEditor = aEditor;
+  mSheet = aSheet;
+
+  return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RemoveStyleSheetTransaction::DoTransaction()
+{
+  NS_ENSURE_TRUE(mEditor && mSheet, NS_ERROR_NOT_INITIALIZED);
+
+  RemoveStyleSheet(mEditor, mSheet);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+RemoveStyleSheetTransaction::UndoTransaction()
+{
+  NS_ENSURE_TRUE(mEditor && mSheet, NS_ERROR_NOT_INITIALIZED);
+
+  AddStyleSheet(mEditor, mSheet);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+RemoveStyleSheetTransaction::GetTxnDescription(nsAString& aString)
+{
+  aString.AssignLiteral("RemoveStyleSheetTransaction");
+  return NS_OK;
+}
+
+} // namespace mozilla