Textfield: suppress cursor repaints when there's a selection

ui/views/controls/textfield/textfield.h

 // Copyright (c) 2012 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 UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 381 matching lines @@
   // password textfield.
   void UpdateSelectionClipboard() const;
 
   // Pastes the selection clipboard for the specified mouse event.
   void PasteSelectionClipboard(const ui::MouseEvent& event);
 
   // Called whenever a keypress is unhandled for any reason, including failing
   // to insert text into a readonly text field.
   void OnKeypressUnhandled();
 
+  // Returns true if an insertion cursor should be visible (a vertical bar,
+  // placed at the point new text will be inserted).
+  bool ShouldShowCursor() const;
+
+  // Returns true if an insertion cursor should be visible and blinking.
+  bool ShouldBlinkCursor() const;
+
+  // Starts and stops blinking the cursor, respectively. These are both
+  // idempotent if the cursor is already blinking/not blinking.
+  void StartBlinkingCursor();
+  void StopBlinkingCursor();
+
+  // Callback for the cursor blink timer. Called every
+  // Textfield::GetCaretBlinkMs().
+  void OnCursorBlinkTimerFired();
+
   // The text model.
   std::unique_ptr<TextfieldModel> model_;
 
   // This is the current listener for events from this Textfield.
   TextfieldController* controller_;
 
   // An edit command to execute on the next key event. When set to a valid
   // value, the key event is still passed to |controller_|, but otherwise
   // ignored in favor of the edit command. Set via
   // SetTextEditCommandForNextKeyEvent() during dispatch of that key event (see
@@ skipping 37 matching lines @@
   // The timer to reveal the last typed password character.
   base::OneShotTimer password_reveal_timer_;
 
   // Tracks whether a user action is being performed; i.e. OnBeforeUserAction()
   // has been called, but OnAfterUserAction() has not yet been called.
   bool performing_user_action_;
 
   // True if InputMethod::CancelComposition() should not be called.
   bool skip_input_method_cancel_composition_;
 
-  // The text editing cursor repaint timer and visibility.
-  base::RepeatingTimer cursor_repaint_timer_;
-  bool cursor_visible_;
+  // Insertion cursor repaint timer and visibility.
+  base::RepeatingTimer cursor_blink_timer_;
 
   // The drop cursor is a visual cue for where dragged text will be dropped.
   bool drop_cursor_visible_;
   gfx::SelectionModel drop_cursor_position_;
 
   // Is the user potentially dragging and dropping from this view?
   bool initiating_drag_;
 
   // A timer and point used to modify the selection when dragging.
   base::RepeatingTimer drag_selection_timer_;
@@ skipping 23 matching lines @@
 
   // Used to bind callback functions to this object.
   base::WeakPtrFactory<Textfield> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Textfield);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_