Implement double/triple click functionality in views textfield.

views/controls/textfield/native_textfield_views.h

Index: views/controls/textfield/native_textfield_views.h
diff --git a/views/controls/textfield/native_textfield_views.h b/views/controls/textfield/native_textfield_views.h
index d474a72b6dd5c6b1fc774d3361d1777313f987a7..fb567cf55b1b1c02c7aabb4b9b365424cf8780f0 100644
--- a/views/controls/textfield/native_textfield_views.h
+++ b/views/controls/textfield/native_textfield_views.h
@@ -14,6 +14,10 @@
 #include "views/controls/textfield/native_textfield_wrapper.h"
 #include "views/view.h"
 
+namespace base {
+class Time;
+}
+
 namespace gfx {
 class Canvas;
 }  // namespace
@@ -108,6 +112,13 @@ class NativeTextfieldViews : public views::View,
   // Enable/Disable TextfieldViews implementation for Textfield.
   static void SetEnableTextfieldViews(bool enabled);
 
+  enum ClickState {
+    TRACKING_DOUBLE_CLICK,
+    TRACKING_TRIPLE_CLICK,
+    NONE,
+  };
+
+
  private:
   friend class NativeTextfieldViewsTest;
 
@@ -162,6 +173,13 @@ class NativeTextfieldViews : public views::View,
   // Find a cusor position for given |point| in this views coordinates.
   size_t FindCursorPosition(const gfx::Point& point) const;
 
+  // Mouse event handler. Returns true if textfield needs to be repainted.
+  bool HandleMousePressed(const views::MouseEvent& e);
+
+  // Helper function that sets the cursor position at the location of mouse
+  // event.
+  void SetCursorForMouseClick(const views::MouseEvent& e);
+
   // Utility function to inform the parent textfield (and its controller if any)
   // that the text in the textfield has changed.
   void PropagateTextChange();
@@ -193,6 +211,15 @@ class NativeTextfieldViews : public views::View,
   // A runnable method factory for callback to update the cursor.
   ScopedRunnableMethodFactory<NativeTextfieldViews> cursor_timer_;
 
+  // Time of last LEFT mouse press. Used for tracking double/triple click.
+  base::Time last_mouse_press_time_;
+
+  // Position of last LEFT mouse press. Used for tracking double/triple click.
+  gfx::Point last_mouse_press_location_;
+
+  // State variable to track double and triple clicks.
+  ClickState click_state_;
+
   // Context menu and its content list for the textfield.
   scoped_ptr<ui::SimpleMenuModel> context_menu_contents_;
   scoped_ptr<Menu2> context_menu_menu_;