Struct wayland_protocols_plasma::text_input::v2::client::zwp_text_input_v2::ZwpTextInputV2

pub struct ZwpTextInputV2 { /* private fields */ }

text input

The zwp_text_input_v2 interface represents text input and input methods associated with a seat. It provides enter/leave events to follow the text input focus for a seat.

Requests are used to enable/disable the text-input object and set state information like surrounding and selected text or the content type. The information about the 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 valid UTF-8 encoded, indices and lengths are in bytes. Indices have to always point to the first byte of an UTF-8 encoded code point. Lengths are not allowed to contain just a part of an UTF-8 encoded code point.

State is sent by the state requests (set_surrounding_text, set_content_type, set_cursor_rectangle and set_preferred_language) and an update_state request. After an enter or an input_method_change event all state information is invalidated and needs to be resent from the client. A reset or entering a new widget on client side also invalidates all current state information.

See also the Event enum for this interface.

Implementations

impl ZwpTextInputV2

pub fn destroy(&self)

Destroy the wp_text_input

Destroy the wp_text_input object. Also disables all surfaces enabled through this wp_text_input object

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

enable text input for surface

Enable text input in a surface (usually when a text entry inside of it has focus).

This can be called before or after a surface gets text (or keyboard) focus via the enter event. Text input to a surface is only active when it has the current text (or keyboard) focus and is enabled.

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

disable text input for surface

Disable text input in a surface (typically when there is no focus on any text entry inside the surface).

pub fn show_input_panel(&self)

show input panels

Requests input panels (virtual keyboard) to show.

This should be used for example to show a virtual keyboard again (with a tap) after it was closed by pressing on a close button on the keyboard.

pub fn hide_input_panel(&self)

hide input panels

Requests input panels (virtual keyboard) to hide.

pub fn set_surrounding_text(&self, text: String, cursor: i32, anchor: i32)

sets the surrounding text

Sets the plain surrounding text around the input position. Text is UTF-8 encoded. Cursor is the byte offset within the surrounding text. Anchor is the byte offset of the selection anchor within the surrounding text. If there is no selected text, anchor is the same as cursor.

Make sure to always send some text before and after the cursor except when the cursor is at the beginning or end of text.

When there was a configure_surrounding_text event take the before_cursor and after_cursor arguments into account for picking how much surrounding text to send.

There is a maximum length of wayland messages so text can not be longer than 4000 bytes.

pub fn set_content_type(&self, hint: ContentHint, purpose: ContentPurpose)

set content purpose and hint

Sets the content purpose and content hint. While the purpose is the basic purpose of an input field, the hint flags allow to modify some of the behavior.

When no content type is explicitly set, a normal content purpose with none hint should be assumed.

pub fn set_cursor_rectangle(&self, x: i32, y: i32, width: i32, height: i32)

set cursor position

Sets the cursor outline as a x, y, width, height rectangle in surface local coordinates.

Allows the compositor to put a window with word suggestions near the cursor.

pub fn set_preferred_language(&self, language: String)

sets preferred language

Sets a specific language. This allows for example a virtual keyboard to show a language specific layout. The “language” argument is a RFC-3066 format language tag.

It could be used for example in a word processor to indicate language of currently edited document or in an instant message application which tracks languages of contacts.

pub fn update_state(&self, serial: u32, reason: UpdateState)

update state

Allows to atomically send state updates from client.

This request should follow after a batch of state updating requests like set_surrounding_text, set_content_type, set_cursor_rectangle and set_preferred_language.

The flags field indicates why an updated state is sent to the input method.

Reset should be used by an editor widget after the text was changed outside of the normal input method flow.

For “change” it is enough to send the changed state, else the full state should be send.

Serial should be set to the serial from the last enter or input_method_changed event.

To make sure to not receive outdated input method events after a reset or switching to a new widget wl_display_sync() should be used after update_state in these cases.

Trait Implementations

impl Borrow<ObjectId> for ZwpTextInputV2

fn borrow(&self) -> &ObjectId

Immutably borrows from an owned value.

impl Clone for ZwpTextInputV2

fn clone(&self) -> ZwpTextInputV2

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ZwpTextInputV2

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

Formats the value using the given formatter.

impl Hash for ZwpTextInputV2

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<ZwpTextInputV2>> for ZwpTextInputV2

fn eq(&self, other: &Weak<ZwpTextInputV2>) -> 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 ZwpTextInputV2

fn eq(&self, other: &ZwpTextInputV2) -> 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 Proxy for ZwpTextInputV2

type Request<'request> = Request<'request>

The request enum for this interface

type 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: Send + Sync + 'static>(&self) -> Option<&U>

Access the user-data associated with this object

fn object_data(&self) -> Option<&Arc<dyn ObjectData>>

Access the raw data associated with this object.

fn backend(&self) -> &WeakBackend

Access the backend associated with this object

fn send_request(&self, req: Self::Request<'_>) -> Result<(), InvalidId>

Send a request for this object.

fn send_constructor<I: Proxy>( &self, req: Self::Request<'_>, data: Arc<dyn ObjectData> ) -> Result<I, InvalidId>

Send a request for this object that creates another object.

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

Create an object proxy from its ID

fn inert(backend: WeakBackend) -> Self

Create an inert object proxy

fn parse_event( conn: &Connection, msg: Message<ObjectId, OwnedFd> ) -> Result<(Self, Self::Event), DispatchError>

Parse a event for this object

fn write_request<'a>( &self, conn: &Connection, msg: Self::Request<'a> ) -> Result<(Message<ObjectId, BorrowedFd<'a>>, Option<(&'static Interface, u32)>), InvalidId>

Serialize a request for this object

fn is_alive(&self) -> bool

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

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

Creates a weak handle to this object

impl Eq for ZwpTextInputV2