fuchsia.ui.input

A interface for interacting with a text input control.

SetKeyboardType

Request

Name	Type
`keyboard_type`	`KeyboardType`

SetState

Request

Name	Type
`state`	`TextInputState`

InjectInput

Request

Name	Type
`event`	`InputEvent`

Show

Request

Name	Type

Hide

Request

Name	Type

InputMethodEditorClient

An interface to receive information from TextInputService.

DidUpdateState

Request

Name	Type
`state`	`TextInputState`
`event`	`InputEvent?`

OnAction

Request

Name	Type
`action`	`InputMethodAction`

STRUCTS

SendKeyboardInputCmd

Defined in fuchsia.ui.input/commands.fidl

Name	Type	Description	Default
`compositor_id`	`uint32`		No default
`keyboard_event`	`KeyboardEvent`		No default

SendPointerInputCmd

Defined in fuchsia.ui.input/commands.fidl

Name	Type	Description	Default
`compositor_id`	`uint32`		No default
`pointer_event`	`PointerEvent`		No default

SetHardKeyboardDeliveryCmd

Defined in fuchsia.ui.input/commands.fidl

Typically, clients should receive text inputs from an IME.

For cases where no IME mediation is desired (such as a game application), this command requests Scenic to deliver hard keyboard events to the client.

By default, Scenic will not deliver hard keyboard events to a client.

Name	Type	Description	Default
`delivery_request`	`bool`		No default

SetParallelDispatchCmd

Defined in fuchsia.ui.input/commands.fidl

Typically, clients that participate in the hit test should receive input events in parallel. This behavior is required for gesture disambiguation.

This command, typically set by the root presenter, allows disabling parallel dispatch; it is part of the input v2 transition work.

Name	Type	Description	Default
`parallel_dispatch`	`bool`		No default

KeyboardEvent

KeyboardEvent represents event generated by a user's interaction with a keyboard.

Those events are triggered by distinct pressed state changes of the keys.

The state transitions should be as follows: PRESSED -> (REPEAT ->) RELEASED or PRESSED -> (REPEAT ->) CANCELLED

The input system will repeat those events automatically when a code_point is available.

DEPRECATED: Will be removed in favor of fuchsia.ui.input.KeyEvent.

Name	Type	Description	Default
`event_time`	`uint64`	Time the event was delivered. The time is in nanoseconds and corresponds to the uptime of the machine.	No default
`device_id`	`uint32`		No default
`phase`	`KeyboardEventPhase`		No default
`hid_usage`	`uint32`	Keyboard HID Usage See https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf	No default
`code_point`	`uint32`	The unicode code point represented by this key event, if any. Dead keys are represented as Unicode combining characters. If there is no unicode code point, this value is zero.	No default
`modifiers`	`uint32`	Key modifiers as defined by the different kModifier constants such as `kModifierCapsLock` currently pressed	No default

PointerEvent

Pointers represent raw data about the user's interaction with the screen.

The state transitions should be as follows: ADD (-> HOVER) -> DOWN -> MOVE -> UP (-> HOVER) -> REMOVE

At any point after the initial ADD, a transition to CANCEL is also possible.

Name	Type	Description	Default
`event_time`	`uint64`	Time the event was delivered. The time is in nanoseconds and corresponds to the uptime of the machine.	No default
`device_id`	`uint32`		No default
`pointer_id`	`uint32`		No default
`type`	`PointerEventType`		No default
`phase`	`PointerEventPhase`		No default
`x`	`float32`	`x` and `y` are in the coordinate system of the View.	No default
`y`	`float32`		No default
`radius_major`	`float32`		0
`radius_minor`	`float32`		0
`buttons`	`uint32`	Currently pressed buttons as defined the kButton constants such as `kMousePrimaryButton`	No default

FocusEvent

Name	Type	Description	Default
`event_time`	`uint64`	Time the event was delivered. The time is in nanoseconds and corresponds to the uptime of the machine.	No default
`focused`	`bool`	Whether the view has gained input focused or not.	No default

Range

Name	Type	Description	Default
`min`	`int32`		No default
`max`	`int32`		No default

RangeF

Name	Type	Description	Default
`min`	`float32`		No default
`max`	`float32`		No default

Axis

Name	Type	Default
`range`	`Range`	No default
`resolution`	`int32`	1
`scale`	`AxisScale`	AxisScale.LINEAR

AxisF

Name	Type	Default
`range`	`RangeF`	No default
`resolution`	`float32`	1
`scale`	`AxisScale`	AxisScale.LINEAR

MediaButtonsDescriptor

Name	Type	Description	Default
`buttons`	`uint32`		No default

KeyboardDescriptor

Name	Type	Description	Default
`keys`	`vector<uint32>`		No default

KeyboardReport

Name	Type	Description	Default
`pressed_keys`	`vector<uint32>`		No default

MouseDescriptor

Name	Type	Default
`rel_x`	`Axis`	No default
`rel_y`	`Axis`	No default
`vscroll`	`Axis?`	No default
`hscroll`	`Axis?`	No default
`buttons`	`uint32`	No default

MouseReport

Name	Type	Default
`rel_x`	`int32`	No default
`rel_y`	`int32`	No default
`rel_hscroll`	`int32`	No default
`rel_vscroll`	`int32`	No default
`pressed_buttons`	`uint32`	No default

StylusDescriptor

Name	Type	Default
`x`	`Axis`	No default
`y`	`Axis`	No default
`pressure`	`Axis?`	No default
`is_invertible`	`bool`	false
`buttons`	`uint32`	No default

StylusReport

Name	Type	Default
`x`	`int32`	No default
`y`	`int32`	No default
`pressure`	`uint32`	No default
`is_in_contact`	`bool`	No default
`in_range`	`bool`	No default
`is_inverted`	`bool`	No default
`pressed_buttons`	`uint32`	No default

TouchscreenDescriptor

Name	Type	Default
`x`	`Axis`	No default
`y`	`Axis`	No default
`max_finger_id`	`uint32`	No default

Touch

Name	Type	Default
`finger_id`	`uint32`	No default
`x`	`int32`	No default
`y`	`int32`	No default
`width`	`uint32`	No default
`height`	`uint32`	No default

TouchscreenReport

Name	Type	Description	Default
`touches`	`vector<Touch>`		No default

SensorDescriptor

Name	Type	Default
`type`	`SensorType`	No default
`loc`	`SensorLocation`	No default
`min_sampling_freq`	`uint32`	No default
`max_sampling_freq`	`uint32`	No default
`fifo_max_event_count`	`uint32`	No default
`phys_min`	`int32`	No default
`phys_max`	`int32`	No default

MediaButtonsReport

MediaButtonsReport describes the media buttons event delivered from the event stream. Each bool in the report represents a single button where true means the button is being pressed. A single report should be sent on every state change.

Name	Type	Default
`volume_up`	`bool`	No default
`volume_down`	`bool`	No default
`mic_mute`	`bool`	No default
`reset`	`bool`	No default

DeviceInfo

Name	Type	Default
`vendor_id`	`uint32`	No default
`product_id`	`uint32`	No default
`version`	`uint32`	No default
`name`	`string`	No default

DeviceDescriptor

Name	Type	Default
`device_info`	`DeviceInfo?`	No default
`keyboard`	`KeyboardDescriptor?`	No default
`media_buttons`	`MediaButtonsDescriptor?`	No default
`mouse`	`MouseDescriptor?`	No default
`stylus`	`StylusDescriptor?`	No default
`touchscreen`	`TouchscreenDescriptor?`	No default
`sensor`	`SensorDescriptor?`	No default

InputReport

Name	Type	Default
`event_time`	`uint64`	No default
`keyboard`	`KeyboardReport?`	No default
`media_buttons`	`MediaButtonsReport?`	No default
`mouse`	`MouseReport?`	No default
`stylus`	`StylusReport?`	No default
`touchscreen`	`TouchscreenReport?`	No default
`sensor`	`SensorReport?`	No default
`trace_id`	`uint64`	0

TextRange

Defined in fuchsia.ui.input/text_editing.fidl

A range of characters in a string of text. Although strings in FIDL's wire format are UTF-8 encoded, these indices are measured in UTF-16 code units for legacy reasons. These text input APIs will eventually be replaced by fuchsia.ui.text, which uses code points instead.

Name Type Description Default

Name	Type	Description	Default
`start`	`int64`	The index of the first UTF-16 code unit in the range. If `start` and `end` are both -1, the text range is empty.	-1
`end`	`int64`	The next index after the last UTF-16 code unit in this range. If `start` and `end` are both -1, the text range is empty.	-1

start

int64

The index of the first UTF-16 code unit in the range.

If start and end are both -1, the text range is empty.

-1

end

int64

The next index after the last UTF-16 code unit in this range.

If start and end are both -1, the text range is empty.

-1

TextSelection

Defined in fuchsia.ui.input/text_editing.fidl

A range of text that represents a selection. Although strings in FIDL's wire format are UTF-8 encoded, these indices are measured in UTF-16 code units for legacy reasons. These text input APIs will eventually be replaced by fuchsia.ui.text, which uses code points instead.

Text selection is always directional. Direction should be determined by comparing base and extent.

Name Type Description Default

Name	Type	Description	Default
`base`	`int64`	The offset at which the selection originates, as measured in UTF-16 code units. Might be larger than, smaller than, or equal to extent.	No default
`extent`	`int64`	The offset at which the selection terminates, as measured in UTF-16 code units. When the user uses the arrow keys to adjust the selection, this is the value that changes. Similarly, if the current theme paints a caret on one side of the selection, this is the location at which to paint the caret. Might be larger than, smaller than, or equal to base.	No default
`affinity`	`TextAffinity`	If the text range is collapsed and has more than one visual location (e.g., occurs at a line break), which of the two locations to use when painting the caret.	No default

base

int64

The offset at which the selection originates, as measured in UTF-16 code units.

Might be larger than, smaller than, or equal to extent.

No default

extent

int64

The offset at which the selection terminates, as measured in UTF-16 code units.

When the user uses the arrow keys to adjust the selection, this is the value that changes. Similarly, if the current theme paints a caret on one side of the selection, this is the location at which to paint the caret.

Might be larger than, smaller than, or equal to base.

No default

affinity

TextAffinity

If the text range is collapsed and has more than one visual location (e.g., occurs at a line break), which of the two locations to use when painting the caret.

No default

TextInputState

The current text, selection, and composing state for editing a run of text.

Name	Type	Description	Default
`revision`	`uint32`	Current state revision to avoid race conditions.	No default
`text`	`string`	The current text being edited.	No default
`selection`	`TextSelection`	The range of text that is currently selected.	No default
`composing`	`TextRange`	The range of text that is still being composed.	No default

ENUMS

KeyboardEventPhase

Type: uint32

Name	Value	Description
`PRESSED`	`0`	When key is pressed down.
`RELEASED`	`1`	When key is released.
`CANCELLED`	`2`	This key `PRESSED` is not directed to this input client anymore.
`REPEAT`	`3`	Whether this is an automatically generated key repeat

PointerEventType

Type: uint32

Name	Value	Description
`TOUCH`	`0`	A touch-based pointer device.
`STYLUS`	`1`	A pointer device with a stylus.
`INVERTED_STYLUS`	`2`	A pointer device with a stylus that has been inverted.
`MOUSE`	`3`	A pointer device without a stylus.

PointerEventPhase

Type: uint32

Name	Value	Description
`ADD`	`0`	The device has started tracking the pointer. For example, the pointer might be hovering above the device, having not yet made contact with the surface of the device.
`HOVER`	`1`	The pointer has moved with respect to the device while not in contact with the device.
`DOWN`	`2`	The pointer has made contact with the device. For `MOUSE` devices, this is triggered when the primary button is pressed down to emulate a touch on the screen.
`MOVE`	`3`	The pointer has moved with respect to the device while in contact with the device.
`UP`	`4`	The pointer has stopped making contact with the device. For `MOUSE` devices, this is triggered when the primary button is released.
`REMOVE`	`5`	The device is no longer tracking the pointer. For example, the pointer might have drifted out of the device's hover detection range or might have been disconnected from the system entirely.
`CANCEL`	`6`	The input from the pointer is no longer directed towards this receiver.

AxisScale

Type: uint32

Name	Value	Description
`LINEAR`	`0`
`LOGARITHMIC`	`1`

SensorType

Type: uint32

Name	Value	Description
`ACCELEROMETER`	`0`
`GYROSCOPE`	`1`
`MAGNETOMETER`	`2`
`LIGHTMETER`	`3`

SensorLocation

Type: uint32

Name	Value	Description
`UNKNOWN`	`0`
`BASE`	`1`
`LID`	`2`

TextAffinity

Type: uint32

Defined in fuchsia.ui.input/text_editing.fidl

Whether a TextPosition is visually upstream or downstream of its offset.

For example, when a text position exists at a line break, a single offset has two visual positions, one prior to the line break (at the end of the first line) and one after the line break (at the start of the second line). A text affinity disambiguates between those cases. (Something similar happens with between runs of bidirectional text.)

Name Value Description

UPSTREAM

0

The position has affinity for the upstream side of the text position.

For example, if the offset of the text position is a line break, the position represents the end of the first line.

DOWNSTREAM

1

The position has affinity for the downstream side of the text position.

For example, if the offset of the text position is a line break, the position represents the start of the second line.

KeyboardType

Type: uint32

Name	Value	Description
`TEXT`	`0`
`NUMBER`	`1`
`PHONE`	`2`
`DATETIME`	`3`

InputMethodAction

Type: uint32

Name	Value	Description
`UNSPECIFIED`	`0`
`NONE`	`1`
`GO`	`2`
`SEARCH`	`3`
`SEND`	`4`
`NEXT`	`5`
`DONE`	`6`
`PREVIOUS`	`7`

TABLES

MediaButtonsEvent

Ordinal	Name	Type	Description
1	`volume`	`int8`
2	`mic_mute`	`bool`

UNIONS

Command

Defined in fuchsia.ui.input/commands.fidl

Name	Type	Description
`send_keyboard_input`	`SendKeyboardInputCmd`	Commands for conveying input events to a `Session`. Structs defined in input_events.fidl.
`send_pointer_input`	`SendPointerInputCmd`
`set_hard_keyboard_delivery`	`SetHardKeyboardDeliveryCmd`	Command to enable/disable delivery of hard keyboard events.
`set_parallel_dispatch`	`SetParallelDispatchCmd`	Command to enable/disable parallel delivery of input events.

InputEvent

This union does not include MediaButtonsEvent because it's processed differently.

Name	Type	Description
`pointer`	`PointerEvent`
`keyboard`	`KeyboardEvent`
`focus`	`FocusEvent`

SensorReport