Make GestureTextSelector detect its own gestures

ui/events/gesture_detection/gesture_listeners.h

Index: ui/events/gesture_detection/gesture_listeners.h
diff --git a/ui/events/gesture_detection/gesture_listeners.h b/ui/events/gesture_detection/gesture_listeners.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d623476b765c57257cf9c0250b2876517bd21d9
--- /dev/null
+++ b/ui/events/gesture_detection/gesture_listeners.h
@@ -0,0 +1,83 @@
+// Copyright 2014 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_EVENTS_GESTURE_DETECTION_GESTURE_LISTENERS_H_
+#define UI_EVENTS_GESTURE_DETECTION_GESTURE_LISTENERS_H_
+
+#include "ui/events/gesture_detection/gesture_detection_export.h"
+
+namespace ui {
+
+class MotionEvent;
+
+// Client through which |GestureDetector| signals gesture detection.
+class GESTURE_DETECTION_EXPORT GestureListener {
+ public:
+  virtual ~GestureListener() {}
+  virtual bool OnDown(const MotionEvent& e) = 0;
+  virtual void OnShowPress(const MotionEvent& e) = 0;
+  virtual bool OnSingleTapUp(const MotionEvent& e) = 0;
+  virtual void OnLongPress(const MotionEvent& e) = 0;
+  virtual bool OnScroll(const MotionEvent& e1,
+                        const MotionEvent& e2,
+                        float distance_x,
+                        float distance_y) = 0;
+  virtual bool OnFling(const MotionEvent& e1,
+                       const MotionEvent& e2,
+                       float velocity_x,
+                       float velocity_y) = 0;
+  // Added for Chromium (Aura).
+  virtual bool OnSwipe(const MotionEvent& e1,
+                       const MotionEvent& e2,
+                       float velocity_x,
+                       float velocity_y) = 0;
+  virtual bool OnTwoFingerTap(const MotionEvent& e1, const MotionEvent& e2) = 0;
+};
+
+// Client through which |GestureDetector| signals double-tap detection.
+class GESTURE_DETECTION_EXPORT DoubleTapListener {
+ public:
+  virtual ~DoubleTapListener() {}
+  virtual bool OnSingleTapConfirmed(const MotionEvent& e) = 0;
+  virtual bool OnDoubleTap(const MotionEvent& e) = 0;
+  virtual bool OnDoubleTapEvent(const MotionEvent& e) = 0;
+};
+
+// A convenience class to extend when you only want to listen for a subset
+// of all the gestures. This implements all methods in the
+// |GestureListener| and |DoubleTapListener| but does
+// nothing and returns false for all applicable methods.
+class GESTURE_DETECTION_EXPORT SimpleGestureListener
+    : public GestureListener,
+      public DoubleTapListener {
+ public:
+  // GestureListener implementation.
+  virtual bool OnDown(const MotionEvent& e) override;
+  virtual void OnShowPress(const MotionEvent& e) override;
+  virtual bool OnSingleTapUp(const MotionEvent& e) override;
+  virtual void OnLongPress(const MotionEvent& e) override;
+  virtual bool OnScroll(const MotionEvent& e1,
+                        const MotionEvent& e2,
+                        float distance_x,
+                        float distance_y) override;
+  virtual bool OnFling(const MotionEvent& e1,
+                       const MotionEvent& e2,
+                       float velocity_x,
+                       float velocity_y) override;
+  virtual bool OnSwipe(const MotionEvent& e1,
+                       const MotionEvent& e2,
+                       float velocity_x,
+                       float velocity_y) override;
+  virtual bool OnTwoFingerTap(const MotionEvent& e1,
+                              const MotionEvent& e2) override;
+
+  // DoubleTapListener implementation.
+  virtual bool OnSingleTapConfirmed(const MotionEvent& e) override;
+  virtual bool OnDoubleTap(const MotionEvent& e) override;
+  virtual bool OnDoubleTapEvent(const MotionEvent& e) override;
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_GESTURE_DETECTION_GESTURE_LISTENERS_H_