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..5f6c4c5e93061067ba35d2c77a567332638ba1c7 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
@@ -111,6 +115,13 @@ class NativeTextfieldViews : public views::View,
  private:
   friend class NativeTextfieldViewsTest;
 
+  enum ClickAction {
+    SELECT_WORD,
+    SELECT_ALL,
+    CURSOR_SELECT,
+    NONE,
+  };
+
   // A Border class to draw focus border for the text field.
   class TextfieldBorder : public Border {
    public:
@@ -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;
 
+  // Double or tripple click handler. Returns true if a double/triple click is
+  // detected and handled.
+  bool DetectAndHandleDoubleAndTripleClick(const views::MouseEvent& e);
+
+  // Helper function determines whether a mouse event is a double/triple click.
+  ClickAction GetClickAction(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 +211,18 @@ 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_;
+
+  // True if a click has occured and we are waiting for a double click.
+  bool tracking_double_click_;
+
+  // True if a double click has occured and we are waiting for a triple click.
+  bool tracking_triple_click_;
+
   // Context menu and its content list for the textfield.
   scoped_ptr<ui::SimpleMenuModel> context_menu_contents_;
   scoped_ptr<Menu2> context_menu_menu_;