1 files changed, 22 insertions, 3 deletions
diff --git a/Source/WebCore/platform/text/BidiContext.h b/Source/WebCore/platform/text/BidiContext.h
index b52815f..9f45d65 100644
--- a/Source/WebCore/platform/text/BidiContext.h
+++ b/Source/WebCore/platform/text/BidiContext.h
@@ -30,33 +30,52 @@
 
 namespace WebCore {
 
+enum BidiEmbeddingSource {
+    FromStyleOrDOM,
+    FromUnicode
+};
+
 // Used to keep track of explicit embeddings.
 class BidiContext : public RefCounted<BidiContext> {
 public:
-    static PassRefPtr<BidiContext> create(unsigned char level, WTF::Unicode::Direction direction, bool override = false, BidiContext* parent = 0);
+    static PassRefPtr<BidiContext> create(unsigned char level, WTF::Unicode::Direction, bool override = false, BidiEmbeddingSource = FromStyleOrDOM, BidiContext* parent = 0);
 
     BidiContext* parent() const { return m_parent.get(); }
     unsigned char level() const { return m_level; }
     WTF::Unicode::Direction dir() const { return static_cast<WTF::Unicode::Direction>(m_direction); }
     bool override() const { return m_override; }
+    BidiEmbeddingSource source() const { return static_cast<BidiEmbeddingSource>(m_source); }
 
+    PassRefPtr<BidiContext> copyStackRemovingUnicodeEmbeddingContexts();
 private:
-    BidiContext(unsigned char level, WTF::Unicode::Direction direction, bool override, BidiContext* parent)
+    BidiContext(unsigned char level, WTF::Unicode::Direction direction, bool override, BidiEmbeddingSource source, BidiContext* parent)
         : m_level(level)
         , m_direction(direction)
         , m_override(override)
+        , m_source(source)
         , m_parent(parent)
     {
     }
 
-    static PassRefPtr<BidiContext> createUncached(unsigned char level, WTF::Unicode::Direction, bool override, BidiContext* parent);
+    static PassRefPtr<BidiContext> createUncached(unsigned char level, WTF::Unicode::Direction, bool override, BidiEmbeddingSource, BidiContext* parent);
 
     unsigned char m_level;
     unsigned m_direction : 5; // Direction
     bool m_override : 1;
+    unsigned m_source : 1; // BidiEmbeddingSource
     RefPtr<BidiContext> m_parent;
 };
 
+inline unsigned char nextGreaterOddLevel(unsigned char level)
+{
+    return (level + 1) | 1;
+}
+
+inline unsigned char nextGreaterEvenLevel(unsigned char level)
+{
+    return (level + 2) & ~1;
+}
+
 bool operator==(const BidiContext&, const BidiContext&);
 
 } // namespace WebCore