Struct wayland_protocols_plasma::text_input::v1::server::wl_text_input::WlTextInput

pub struct WlTextInput { /* private fields */ }

text input

An object used for text input. Adds support for text input and input methods to applications. A text-input object is created from a wl_text_input_manager and corresponds typically to a text entry in an application. Requests are used to activate/deactivate the text-input object and set state information like surrounding and selected text or the content type. The information about entered text is sent to the text-input object via the pre-edit and commit events. Using this interface removes the need for applications to directly process hardware key events and compose text out of them.

Text is generally UTF-8 encoded, indices and lengths are in bytes.

Serials are used to synchronize the state between the text input and an input method. New serials are sent by the text input in the commit_state request and are used by the input method to indicate the known text input state in events like preedit_string, commit_string, and keysym. The text input can then ignore events from the input method which are based on an outdated state (for example after a reset).

See also the Request enum for this interface.

Implementations

impl WlTextInput

pub fn enter(&self, surface: &WlSurface)

enter event

Notify the text-input object when it received focus. Typically in response to an activate request.

pub fn leave(&self)

leave event

Notify the text-input object when it lost focus. Either in response to a deactivate request or when the assigned surface lost focus or was destroyed.

pub fn modifiers_map(&self, map: Vec<u8>)

modifiers map

Transfer an array of 0-terminated modifiers names. The position in the array is the index of the modifier as used in the modifiers bitmask in the keysym event.

pub fn input_panel_state(&self, state: u32)

state of the input panel

Notify when the visibility state of the input panel changed.

pub fn preedit_string(&self, serial: u32, text: String, commit: String)

pre-edit

Notify when a new composing text (pre-edit) should be set around the current cursor position. Any previously set composing text should be removed.

The commit text can be used to replace the preedit text on reset (for example on unfocus).

The text input should also handle all preedit_style and preedit_cursor events occurring directly before preedit_string.

pub fn preedit_styling(&self, index: u32, length: u32, style: u32)

pre-edit styling

Sets styling information on composing text. The style is applied for length bytes from index relative to the beginning of the composing text (as byte offset). Multiple styles can be applied to a composing text by sending multiple preedit_styling events.

This event is handled as part of a following preedit_string event.

pub fn preedit_cursor(&self, index: i32)

pre-edit cursor

Sets the cursor position inside the composing text (as byte offset) relative to the start of the composing text. When index is a negative number no cursor is shown.

This event is handled as part of a following preedit_string event.

pub fn commit_string(&self, serial: u32, text: String)

commit

Notify when text should be inserted into the editor widget. The text to commit could be either just a single character after a key press or the result of some composing (pre-edit). It could be also an empty text when some text should be removed (see delete_surrounding_text) or when the input cursor should be moved (see cursor_position).

Any previously set composing text should be removed.

pub fn cursor_position(&self, index: i32, anchor: i32)

set cursor to new position

Notify when the cursor or anchor position should be modified.

This event should be handled as part of a following commit_string event.

pub fn delete_surrounding_text(&self, index: i32, length: u32)

delete surrounding text

Notify when the text around the current cursor position should be deleted.

Index is relative to the current cursor (in bytes). Length is the length of deleted text (in bytes).

This event should be handled as part of a following commit_string event.

pub fn keysym( &self, serial: u32, time: u32, sym: u32, state: u32, modifiers: u32 )

keysym

Notify when a key event was sent. Key events should not be used for normal text input operations, which should be done with commit_string, delete_surrounding_text, etc. The key event follows the wl_keyboard key event convention. Sym is a XKB keysym, state a wl_keyboard key_state. Modifiers are a mask for effective modifiers (where the modifier indices are set by the modifiers_map event)

pub fn language(&self, serial: u32, language: String)

language

Sets the language of the input text. The “language” argument is a RFC-3066 format language tag.

pub fn text_direction(&self, serial: u32, direction: u32)

text direction

Sets the text direction of input text.

It is mainly needed for showing input cursor on correct side of the editor when there is no input yet done and making sure neutral direction text is laid out properly.

Trait Implementations

impl Borrow<ObjectId> for WlTextInput

fn borrow(&self) -> &ObjectId

Immutably borrows from an owned value.

impl Clone for WlTextInput

fn clone(&self) -> WlTextInput

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WlTextInput

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for WlTextInput

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<Weak<WlTextInput>> for WlTextInput

fn eq(&self, other: &Weak<WlTextInput>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for WlTextInput

fn eq(&self, other: &WlTextInput) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Resource for WlTextInput

type Request = Request

The request enum for this interface

type Event<'event> = Event<'event>

The event enum for this interface

fn interface() -> &'static Interface

The interface description

fn id(&self) -> ObjectId

The ID of this object

fn version(&self) -> u32

The version of this object

fn data<U: 'static>(&self) -> Option<&U>

Access the user-data associated with this object

fn object_data(&self) -> Option<&Arc<dyn Any + Send + Sync>>

Access the raw data associated with this object.

fn handle(&self) -> &WeakHandle

Access the backend handle associated with this object

fn from_id(conn: &DisplayHandle, id: ObjectId) -> Result<Self, InvalidId>

Create an object resource from its ID

fn send_event(&self, evt: Self::Event<'_>) -> Result<(), InvalidId>

Send an event to this object

fn parse_request( conn: &DisplayHandle, msg: Message<ObjectId, OwnedFd> ) -> Result<(Self, Self::Request), DispatchError>

Parse a event for this object

fn write_event<'a>( &self, conn: &DisplayHandle, msg: Self::Event<'a> ) -> Result<Message<ObjectId, BorrowedFd<'a>>, InvalidId>

Serialize an event for this object

fn client(&self) -> Option<Client>

The client owning this object

fn is_alive(&self) -> bool

Checks if the Wayland object associated with this proxy is still alive

fn post_error(&self, code: impl Into<u32>, error: impl Into<String>)

Trigger a protocol error on this object

fn downgrade(&self) -> Weak<Self>

Creates a weak handle to this object

impl Eq for WlTextInput