trunk/src/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.cc - Issue 79143002: Revert 236254 "Replace old with new synthetic gesture framework."

Side by Side Diff: trunk/src/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.cc

Issue 79143002: Revert 236254 "Replace old with new synthetic gesture framework." (Closed) Base URL: svn://svn.chromium.org/chrome/

Patch Set: Created 7 years, 1 month ago

Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.

Jump to:

View unified diff | Download patch | Annotate | Revision Log

« no previous file with comments | « trunk/src/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h ('k') | trunk/src/content/browser/renderer_host/input/synthetic_smooth_scroll_gesture_new.h » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Hide Comments ('s')

OLD	NEW
	(Empty)
1 // Copyright 2013 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 #include "content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h"

6

7 #include <cmath>

8

9 #include "content/common/input/input_event.h"

10 #include "ui/events/latency_info.h"

11

12 namespace content {

13

14 SyntheticSmoothScrollGesture::SyntheticSmoothScrollGesture(

15 const SyntheticSmoothScrollGestureParams& params)

16 : params_(params), current_y_(params_.anchor.y()) {}

17

18 SyntheticSmoothScrollGesture::~SyntheticSmoothScrollGesture() {}

19

20 SyntheticGesture::Result SyntheticSmoothScrollGesture::ForwardInputEvents(

21 const base::TimeDelta& interval, SyntheticGestureTarget* target) {

22

23 SyntheticGestureParams::GestureSourceType source =

24 params_.gesture_source_type;

25 if (source == SyntheticGestureParams::DEFAULT_INPUT)

26 source = target->GetDefaultSyntheticGestureSourceType();

27

28 if (!target->SupportsSyntheticGestureSourceType(source))

29 return SyntheticGesture::GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM;

30

31 if (source == SyntheticGestureParams::TOUCH_INPUT)

32 return ForwardTouchInputEvents(interval, target);

33 else if (source == SyntheticGestureParams::MOUSE_INPUT)

34 return ForwardMouseInputEvents(interval, target);

35 else

36 return SyntheticGesture::GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED;

37 }

38

39 SyntheticGesture::Result SyntheticSmoothScrollGesture::ForwardTouchInputEvents(

40 const base::TimeDelta& interval, SyntheticGestureTarget* target) {

41 if (HasFinished())

42 return SyntheticGesture::GESTURE_FINISHED;

43

44 if (current_y_ == params_.anchor.y()) {

45 touch_event_.PressPoint(params_.anchor.x(), current_y_);

46 ForwardTouchEvent(target);

47 }

48

49 current_y_ += GetPositionDelta(interval);

50 touch_event_.MovePoint(0, params_.anchor.x(), current_y_);

51 ForwardTouchEvent(target);

52

53 if (HasFinished()) {

54 touch_event_.ReleasePoint(0);

55 ForwardTouchEvent(target);

56 return SyntheticGesture::GESTURE_FINISHED;

57 }

58

59 return SyntheticGesture::GESTURE_RUNNING;

60 }

61

62 SyntheticGesture::Result SyntheticSmoothScrollGesture::ForwardMouseInputEvents(

63 const base::TimeDelta& interval, SyntheticGestureTarget* target) {

64 if (HasFinished())

65 return SyntheticGesture::GESTURE_FINISHED;

66

67 float delta = GetPositionDelta(interval);

68 current_y_ += delta;

69 ForwardMouseWheelEvent(target, delta);

70

71 if (HasFinished())

72 return SyntheticGesture::GESTURE_FINISHED;

73

74 return SyntheticGesture::GESTURE_RUNNING;

75 }

76

77 void SyntheticSmoothScrollGesture::ForwardTouchEvent(

78 SyntheticGestureTarget* target) {

79 target->DispatchInputEventToPlatform(

80 InputEvent(touch_event_, ui::LatencyInfo(), false));

81 }

82

83 void SyntheticSmoothScrollGesture::ForwardMouseWheelEvent(

84 SyntheticGestureTarget* target, float delta) {

85 blink::WebMouseWheelEvent mouse_wheel_event =

86 SyntheticWebMouseWheelEventBuilder::Build(0, delta, 0, false);

87

88 mouse_wheel_event.x = params_.anchor.x();

89 mouse_wheel_event.y = params_.anchor.y();

90

91 target->DispatchInputEventToPlatform(

92 InputEvent(mouse_wheel_event, ui::LatencyInfo(), false));

93 }

94

95 float SyntheticSmoothScrollGesture::GetPositionDelta(

96 const base::TimeDelta& interval) {

97 float delta = params_.speed_in_pixels_s * interval.InSecondsF();

98 // A positive value indicates scrolling down, which means the touch pointer

99 // moves up or the scroll wheel moves down. In either case, the delta is

100 // negative when scrolling down and positive when scrolling up.

101 return (params_.distance > 0) ? -delta : delta;

102 }

103

104 bool SyntheticSmoothScrollGesture::HasFinished() {

105 return abs(current_y_ - params_.anchor.y()) >= abs(params_.distance);

106 }

107

108 } // namespace content

OLD	NEW