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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/browser/renderer_host/input/gesture_text_selector.h" | 5 #include "content/browser/renderer_host/input/gesture_text_selector.h" |
6 | 6 |
7 #include "ui/events/event_constants.h" | 7 #include "ui/events/event_constants.h" |
8 #include "ui/events/gesture_detection/gesture_config_helper.h" | 8 #include "ui/events/gesture_detection/gesture_config_helper.h" |
9 #include "ui/events/gesture_detection/gesture_detector.h" | 9 #include "ui/events/gesture_detection/gesture_detector.h" |
10 #include "ui/events/gesture_detection/motion_event.h" | 10 #include "ui/events/gesture_detection/motion_event.h" |
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27 new ui::GestureDetector(config, listener, null_double_tap_listener)); | 27 new ui::GestureDetector(config, listener, null_double_tap_listener)); |
28 detector->set_longpress_enabled(false); | 28 detector->set_longpress_enabled(false); |
29 detector->set_showpress_enabled(false); | 29 detector->set_showpress_enabled(false); |
30 | 30 |
31 return detector.Pass(); | 31 return detector.Pass(); |
32 } | 32 } |
33 | 33 |
34 } // namespace | 34 } // namespace |
35 | 35 |
36 GestureTextSelector::GestureTextSelector(GestureTextSelectorClient* client) | 36 GestureTextSelector::GestureTextSelector(GestureTextSelectorClient* client) |
37 : client_(client), text_selection_triggered_(false) { | 37 : client_(client), |
38 text_selection_triggered_(false), | |
39 secondary_button_pressed_(false) { | |
38 DCHECK(client); | 40 DCHECK(client); |
jdduke (slow)
2014/10/10 16:23:21
Also initialize anchor_x_/anchor_y_ in the constru
| |
39 } | 41 } |
40 | 42 |
41 GestureTextSelector::~GestureTextSelector() { | 43 GestureTextSelector::~GestureTextSelector() { |
42 } | 44 } |
43 | 45 |
44 bool GestureTextSelector::OnTouchEvent(const MotionEvent& event) { | 46 bool GestureTextSelector::OnTouchEvent(const MotionEvent& event) { |
45 if (event.GetAction() == MotionEvent::ACTION_DOWN) { | 47 if (event.GetAction() == MotionEvent::ACTION_DOWN) { |
46 // Only trigger selection on ACTION_DOWN to prevent partial touch or gesture | 48 // Only trigger selection on ACTION_DOWN to prevent partial touch or gesture |
47 // sequences from being forwarded. | 49 // sequences from being forwarded. |
48 text_selection_triggered_ = ShouldStartTextSelection(event); | 50 text_selection_triggered_ = ShouldStartTextSelection(event); |
51 secondary_button_pressed_ = | |
52 event.GetButtonState() == MotionEvent::BUTTON_SECONDARY; | |
53 anchor_x_ = event.GetX(); | |
54 anchor_y_ = event.GetY(); | |
49 } | 55 } |
50 | 56 |
51 if (!text_selection_triggered_) | 57 if (!text_selection_triggered_) |
52 return false; | 58 return false; |
53 | 59 |
60 if (event.GetAction() == MotionEvent::ACTION_MOVE) { | |
61 secondary_button_pressed_ = | |
62 event.GetButtonState() == MotionEvent::BUTTON_SECONDARY; | |
63 if (!secondary_button_pressed_) { | |
64 anchor_x_ = event.GetX(); | |
65 anchor_y_ = event.GetY(); | |
66 } | |
67 } | |
68 | |
54 if (!gesture_detector_) | 69 if (!gesture_detector_) |
55 gesture_detector_ = CreateGestureDetector(this); | 70 gesture_detector_ = CreateGestureDetector(this); |
56 | 71 |
57 gesture_detector_->OnTouchEvent(event); | 72 gesture_detector_->OnTouchEvent(event); |
58 | 73 |
59 // Always return true, even if |gesture_detector_| technically doesn't | 74 // Always return true, even if |gesture_detector_| technically doesn't |
60 // consume the event, to prevent a partial touch stream from being forwarded. | 75 // consume the event, to prevent a partial touch stream from being forwarded. |
61 return true; | 76 return true; |
62 } | 77 } |
63 | 78 |
64 bool GestureTextSelector::OnSingleTapUp(const MotionEvent& e) { | 79 bool GestureTextSelector::OnSingleTapUp(const MotionEvent& e) { |
65 DCHECK(text_selection_triggered_); | 80 DCHECK(text_selection_triggered_); |
66 client_->LongPress(e.GetEventTime(), e.GetX(), e.GetY()); | 81 client_->LongPress(e.GetEventTime(), e.GetX(), e.GetY()); |
67 return true; | 82 return true; |
68 } | 83 } |
69 | 84 |
70 bool GestureTextSelector::OnScroll(const MotionEvent& e1, | 85 bool GestureTextSelector::OnScroll(const MotionEvent& e1, |
71 const MotionEvent& e2, | 86 const MotionEvent& e2, |
72 float distance_x, | 87 float distance_x, |
73 float distance_y) { | 88 float distance_y) { |
74 DCHECK(text_selection_triggered_); | 89 DCHECK(text_selection_triggered_); |
90 | |
91 // Return if Stylus button is not pressed. | |
92 if (!secondary_button_pressed_) | |
93 return true; | |
94 | |
75 // TODO(changwan): check if we can show handles after the scroll finishes | 95 // TODO(changwan): check if we can show handles after the scroll finishes |
76 // instead. Currently it is not possible as ShowSelectionHandles should | 96 // instead. Currently it is not possible as ShowSelectionHandles should |
77 // be called before we change the selection. | 97 // be called before we change the selection. |
78 client_->ShowSelectionHandlesAutomatically(); | 98 client_->ShowSelectionHandlesAutomatically(); |
79 client_->SelectRange(e1.GetX(), e1.GetY(), e2.GetX(), e2.GetY()); | 99 client_->SelectRange(anchor_x_, anchor_y_, e2.GetX(), e2.GetY()); |
80 return true; | 100 return true; |
81 } | 101 } |
82 | 102 |
83 // static | 103 // static |
84 bool GestureTextSelector::ShouldStartTextSelection(const MotionEvent& event) { | 104 bool GestureTextSelector::ShouldStartTextSelection(const MotionEvent& event) { |
85 DCHECK_GT(event.GetPointerCount(), 0u); | 105 DCHECK_GT(event.GetPointerCount(), 0u); |
86 // Currently we are supporting stylus-only cases. | 106 // Currently we are supporting stylus-only cases. |
87 const bool is_stylus = event.GetToolType(0) == MotionEvent::TOOL_TYPE_STYLUS; | 107 const bool is_stylus = event.GetToolType(0) == MotionEvent::TOOL_TYPE_STYLUS; |
88 const bool is_only_secondary_button_pressed = | 108 const bool is_only_secondary_button_pressed = |
89 event.GetButtonState() == MotionEvent::BUTTON_SECONDARY; | 109 event.GetButtonState() == MotionEvent::BUTTON_SECONDARY; |
90 return is_stylus && is_only_secondary_button_pressed; | 110 return is_stylus && is_only_secondary_button_pressed; |
91 } | 111 } |
92 | 112 |
93 } // namespace content | 113 } // namespace content |
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