Integrating GtkIMContext into the RenderWidgetHostViewGtk class....

chrome/browser/renderer_host/render_widget_host_view_gtk.h

Index: chrome/browser/renderer_host/render_widget_host_view_gtk.h
===================================================================
--- chrome/browser/renderer_host/render_widget_host_view_gtk.h	(revision 18994)
+++ chrome/browser/renderer_host/render_widget_host_view_gtk.h	(working copy)
@@ -18,6 +18,7 @@
 
 typedef struct _GtkClipboard GtkClipboard;
 typedef struct _GtkSelectionData GtkSelectionData;
+typedef struct _GtkIMContext GtkIMContext;
 
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
@@ -109,6 +110,28 @@
   // We ignore the first mouse release on popups.  This allows the popup to
   // stay open.
   bool is_popup_first_mouse_release_;
+
+  // The GtkIMContext object.
+  // In terms of the DOM event specification Appendix A
+  //   <http://www.w3.org/TR/DOM-Level-3-Events/keyset.html>,
+  // GTK uses a GtkIMContext object for the following two purposes:
+  //  1. Composing Latin characters (A.1.2), and;
+  //  2. Composing CJK characters with an IME (A.1.3).
+  // Many JavaScript pages assume composed Latin characters are dispatched to
+  // their onkeypress() handlers but not dispatched CJK characters composed
+  // with an IME. To emulate this behavior, we should monitor the status of
+  // this GtkIMContext object and prevent sending Char events when a
+  // GtkIMContext object sends a "commit" signal with the CJK characters
+  // composed by an IME.
+  GtkIMContext* im_context_;
+
+  // Whether or not the above GtkIMContext is composing a CJK text with an IME.
+  // The GtkIMContext object sends a "preedit_start" before it starts composing
+  // a CJK text and a "preedit_end" signal after it finishes composing it.
+  // On the other hand, the GtkIMContext object doesn't send them when
+  // composing Latin texts. So, we monitor the above signals to check whether
+  // or not the GtkIMContext object is composing a CJK text.
+  bool im_is_composing_cjk_text_;
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_