1 files changed, 72 insertions, 0 deletions
diff --git a/Source/WebCore/platform/text/BidiContext.cpp b/Source/WebCore/platform/text/BidiContext.cpp
new file mode 100644
index 0000000..fb6b8cf
--- /dev/null
+++ b/Source/WebCore/platform/text/BidiContext.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2003, 2004, 2006, 2007, 2009, 2010 Apple Inc. All right 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.
+ *
+ */
+
+#include "config.h"
+#include "BidiContext.h"
+
+namespace WebCore {
+
+using namespace WTF::Unicode;
+
+inline PassRefPtr<BidiContext> BidiContext::createUncached(unsigned char level, Direction direction, bool override, BidiContext* parent)
+{
+    return adoptRef(new BidiContext(level, direction, override, parent));
+}
+
+PassRefPtr<BidiContext> BidiContext::create(unsigned char level, Direction direction, bool override, BidiContext* parent)
+{
+    ASSERT(direction == (level % 2 ? RightToLeft : LeftToRight));
+
+    if (parent)
+        return createUncached(level, direction, override, parent);
+
+    ASSERT(level <= 1);
+    if (!level) {
+        if (!override) {
+            static BidiContext* ltrContext = createUncached(0, LeftToRight, false, 0).releaseRef();
+            return ltrContext;
+        }
+
+        static BidiContext* ltrOverrideContext = createUncached(0, LeftToRight, true, 0).releaseRef();
+        return ltrOverrideContext;
+    }
+
+    if (!override) {
+        static BidiContext* rtlContext = createUncached(1, RightToLeft, false, 0).releaseRef();
+        return rtlContext;
+    }
+
+    static BidiContext* rtlOverrideContext = createUncached(1, RightToLeft, true, 0).releaseRef();
+    return rtlOverrideContext;
+}
+
+bool operator==(const BidiContext& c1, const BidiContext& c2)
+{
+    if (&c1 == &c2)
+        return true;
+    if (c1.level() != c2.level() || c1.override() != c2.override() || c1.dir() != c2.dir())
+        return false;
+    if (!c1.parent())
+        return !c2.parent();
+    return c2.parent() && *c1.parent() == *c2.parent();
+}
+
+} // namespace WebCore