Implement double/triple click functionality in views textfield.

views/controls/textfield/native_textfield_views.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
 #define VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
 #pragma once
 
 #include "base/string16.h"
 #include "base/task.h"
 #include "gfx/font.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "views/border.h"
 #include "views/controls/textfield/native_textfield_wrapper.h"
 #include "views/view.h"
 
+namespace base {
+class Time;
+}
+
 namespace gfx {
 class Canvas;
 }  // namespace
 
 namespace views {
 
 class KeyEvent;
 class Menu2;
 class TextfieldViewsModel;
 
@@ skipping 77 matching lines @@
   // 1) built with GYP_DEFIENS="touchui=1"
   // 2) enabled by SetEnableTextfieldViews(true)
   // 3) enabled by the command line flag "--enable-textfield-view".
   static bool IsTextfieldViewsEnabled();
   // Enable/Disable TextfieldViews implementation for Textfield.
   static void SetEnableTextfieldViews(bool enabled);
 
  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:
     TextfieldBorder();
 
     // Border implementation.
     virtual void Paint(const View& view, gfx::Canvas* canvas) const;
     virtual void GetInsets(gfx::Insets* insets) const;
 
     // Sets the insets of the border.
@@ skipping 31 matching lines @@
   // Handle the keyevent.
   bool HandleKeyEvent(const KeyEvent& key_event);
 
   // Utility function. Gets the character corresponding to a keyevent.
   // Returns 0 if the character is not printable.
   char16 GetPrintableChar(const KeyEvent& key_event);
 
   // 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();
 
   // Utility function to create the context menu if one does not already exist.
   void InitContextMenuIfRequired();
 
   // The parent textfield, the owner of this object.
   Textfield* textfield_;
 
@@ skipping 11 matching lines @@
 
   // True if the textfield is in insert mode.
   bool insert_;
 
   // The drawing state of cursor. True to draw.
   bool is_cursor_visible_;
 
   // 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_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTextfieldViews);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_