diff -r 000000000000 -r 4f2f89ce4247 WebCore/editing/EditingBehavior.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/EditingBehavior.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef EditingBehavior_h
+#define EditingBehavior_h
+
+#include "EditingBehaviorTypes.h"
+
+namespace WebCore {
+
+class EditingBehavior {
+
+public:
+    EditingBehavior(EditingBehaviorType type)
+        : m_type(type)
+    {
+    }
+
+    // Individual functions for each case where we have more than one style of editing behavior.
+    // Create a new function for any platform difference so we can control it here.
+
+    // When extending a selection beyond the top or bottom boundary of an editable area,
+    // maintain the horizontal position on Windows but extend it to the boundary of the editable
+    // content on Mac.
+    bool shouldMoveCaretToHorizontalBoundaryWhenPastTopOrBottom() const { return m_type != EditingWindowsBehavior; }
+
+    // On Windows, selections should always be considered as directional, regardless if it is
+    // mouse-based or keyboard-based.
+    bool shouldConsiderSelectionAsDirectional() const { return m_type != EditingMacBehavior; }
+
+    // On Mac, when revealing a selection (for example as a result of a Find operation on the Browser),
+    // content should be scrolled such that the selection gets certer aligned.
+    bool shouldCenterAlignWhenSelectionIsRevealed() const { return m_type == EditingMacBehavior; }
+
+    // On Mac, style is considered present when present at the beginning of selection. On other platforms,
+    // style has to be present throughout the selection.
+    bool shouldToggleStyleBasedOnStartOfSelection() const { return m_type == EditingMacBehavior; }
+
+private:
+    EditingBehaviorType m_type;
+};
+
+} // namespace WebCore
+
+#endif // EditingBehavior_h