1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_TEXT_SELECTOR_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_TEXT_SELECTOR_H_ 7 8 #include "base/gtest_prod_util.h" 9 #include "base/macros.h" 10 #include "base/time/time.h" 11 #include "content/common/content_export.h" 12 13 namespace ui { 14 struct GestureEventData; 15 class MotionEvent; 16 } 17 18 namespace content { 19 class GestureTextSelectorTest; 20 21 // Interface with which GestureTextSelector can select, unselect, show 22 // selection handles, or long press. 23 class CONTENT_EXPORT GestureTextSelectorClient { 24 public: ~GestureTextSelectorClient()25 virtual ~GestureTextSelectorClient() {} 26 27 virtual void ShowSelectionHandlesAutomatically() = 0; 28 virtual void SelectRange(float x1, float y1, float x2, float y2) = 0; 29 virtual void Unselect() = 0; 30 virtual void LongPress(base::TimeTicks time, float x, float y) = 0; 31 }; 32 33 // A class to handle gesture-based text selection, such as when clicking first 34 // button on stylus input. It also generates a synthetic long press gesture on 35 // tap so that a word can be selected or the contextual menu can be shown. 36 class CONTENT_EXPORT GestureTextSelector { 37 public: 38 explicit GestureTextSelector(GestureTextSelectorClient* client); 39 virtual ~GestureTextSelector(); 40 41 // This should be called after gesture detection but before associated 42 // gestures are dispatched. Returns whether it will consume |event|. 43 bool OnTouchEvent(const ui::MotionEvent& event); 44 45 // Returns whether it will consume the event. 46 bool OnGestureEvent(const ui::GestureEventData& gesture); 47 48 private: 49 friend class GestureTextSelectorTest; 50 FRIEND_TEST_ALL_PREFIXES(GestureTextSelectorTest, 51 ShouldStartTextSelection); 52 53 static bool ShouldStartTextSelection(const ui::MotionEvent& event); 54 55 GestureTextSelectorClient* client_; 56 bool text_selection_triggered_; 57 float anchor_x_; 58 float anchor_y_; 59 60 DISALLOW_COPY_AND_ASSIGN(GestureTextSelector); 61 }; 62 63 } // namespace content 64 65 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_TEXT_SELECTOR_H_ 66