components/mus/public/interfaces/input_events.mojom - Issue 2057793002: Reorganize event mojom files.

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Issue 2057793002: Reorganize event mojom files. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Fixed typos in comments. Created 4 years, 6 months ago

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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 module mus.mojom;

6

7 import "components/mus/public/interfaces/input_event_constants.mojom";

8 import "components/mus/public/interfaces/input_key_codes.mojom";

9

10 struct KeyData {

11 // The chromium event key code; these values are from the ui/ KeyCode enum,

12 // which has the fun property of being neither consistently the Windows key

13 // code, nor the X11 keycodes. (This value is consistent across platforms

14 // for basic ASCII characters; it will differ for modifiers. We don't define

15 // this as a mojo enum because mojom doesn't appear to have a platform

16 // dependent preprocessor yet.)

17 //

18 // TODO(erg): Remove this, and declare Win32 keycodes correct by fiat. We can

19 // not do this until we remove ui::Event usage from within mojo.

20 int32 key_code;

21

22 // Whether this is a character event, and the character value if it is. Note

23 // that this is different than \|text\|, which holds a value even when there

24 // isn't actually a character to insert. (For example, \|text\| will be set and

25 // have a value on backspace, and \|character\| won't.)

26 bool is_char;

27 uint16 character;

28

29 // The Win32 key code. Because of the web, this is the closest thing that we

30 // have to a cross platform key state.

31 KeyboardCode windows_key_code;

32

33 // The platform specific key code.

34 //

35 // TODO(erg): This exists only for NPAPI support, pepper USB keyboard support

36 // and IME on android support. Theoretically, we should be able to remove this

37 // in the medium to long term.

38 int32 native_key_code;

39

40 // The text generated by this keystroke. Corresponds to

41 // blink::WebKeyboardEvent::text.

42 uint16 text;

43

44 // Like \|text\|, but unmodified by concurrently held modifier keys (except

45 // shift). Corresponds to blink::WebKeyboardEvent::unmodifiedText.

46 uint16 unmodified_text;

47 };

48

49 struct LocationData {

50 // \|x\| and \|y\| are in the coordinate system of the View.

51 // Typically, this will be an integer-valued translation w.r.t.

52 // the screen and in this case, \|x\| and \|y\| are in units of physical

53 // pixels. However, some View embedders may apply arbitrary transformations

54 // of a view w.r.t. the screen.

55 float x;

56 float y;

57 // \|screen_x\| and \|screen_y\| are in screen coordinates in units of

58 // physical pixels.

59 float screen_x;

60 float screen_y;

61 };

62

63 // TODO(rjkroege,sadrul): Add gesture representation.

64 struct PointerData {

65 int32 pointer_id;

66 PointerKind kind;

67 LocationData location;

68 // Some devices (e.g. pen, finger) can extend across multiple pixels

69 // at once. \|brush_data\| provides additional data for this case and

70 // is available when \|kind\| is PEN or TOUCH.

71 BrushData? brush_data;

72 // Only set for \|WHEEL\| events.

73 WheelData? wheel_data;

74 };

75

76 // Information payload to support

77 // https://developer.mozilla.org/en-US/docs/Web/Events/wheel.

78 // TODO(rjkroege): Handle MacOS momentum scrolling.

79 struct WheelData {

80 WheelMode mode;

81 // \|delta_x\|, \|delta_y\|, \|delta_z\| can be in units of pixels, lines, pages

82 // or control scaling as controlled by \|mode\|. Pixel scroll is physical

83 // pixels in the coordinate system of the target View.

84 float delta_x;

85 float delta_y;

86 float delta_z;

87 };

88

89 // Supplementary data to support pointers where the pointer can

90 // cover multiple pixels per http://www.w3.org/TR/pointerevents/

91 struct BrushData {

92 // \|width\| and \|height\| are in CSS pixels in the coordinate system of

93 // the target View.

94 float width;

95 float height;

96 // \|pressure\| range is [0,1]. For devices like mice buttons where the

97 // pressure is not available, it will be set to 0.5 if the button is down.

98 float pressure;

99 // \|tilt_x\| and \|tilt_y\| are in degrees. See comments in ui::PointerDetails

100 // for more information.

101 float tilt_x;

102 float tilt_y;

103 };

104

105 struct Event {

106 // TODO(sky): rename to type.

107 EventType action;

108 // A bitfield of kEventFlag* and kMouseEventFlag* values in

109 // input_event_constants.mojom.

110 //

111 // TODO(sky): parts of this should move to PointerData.

112 int32 flags;

113 // Time in microseconds from when the platform was started.

114 // This value accurately orders events w.r.t. to each other but

115 // does not position them at an absolute time.

116 int64 time_stamp;

117 KeyData? key_data;

118 PointerData? pointer_data;

119 };

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