Trait wayland_commons::MessageGroup

pub trait MessageGroup: Sized {
    type Map;

    const MESSAGES: &'static [MessageDesc];

    fn opcode(&self) -> u16;
    fn is_destructor(&self) -> bool;
    fn since(&self) -> u32;
    fn child<Meta: ObjectMetadata>(
        opcode: u16, 
        version: u32, 
        meta: &Meta
    ) -> Option<Object<Meta>>;
    fn from_raw(msg: Message, map: &mut Self::Map) -> Result<Self, ()>;
    fn into_raw(self, send_id: u32) -> Message;
    unsafe fn from_raw_c(
        obj: *mut c_void, 
        opcode: u32, 
        args: *const wl_argument
    ) -> Result<Self, ()>;
    fn as_raw_c_in<F, T>(self, f: F) -> T
    where
        F: FnOnce(u32, &mut [wl_argument]) -> T;
}

A group of messages

This represents a group of message that can be serialized on the protocol wire. Typically the set of events or requests of a single interface.

Implementations of this trait are supposed to be generated using the wayland-scanner crate.

Associated Types

type Map

The wrapper type for ObjectMap allowing the mapping of Object and NewId arguments to the object map during parsing.

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Associated Constants

const MESSAGES: &'static [MessageDesc]

Wire representation of this MessageGroup

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Required methods

fn opcode(&self) -> u16

The opcode of this message

fn is_destructor(&self) -> bool

Whether this message is a destructor

If it is, once send or receive the associated object cannot be used any more.

fn since(&self) -> u32

The minimal object version for which this message exists

fn child<Meta: ObjectMetadata>(
    opcode: u16,
    version: u32,
    meta: &Meta
) -> Option<Object<Meta>>

Retrieve the child Object associated with this message if any

fn from_raw(msg: Message, map: &mut Self::Map) -> Result<Self, ()>

Construct a message from its raw representation

fn into_raw(self, send_id: u32) -> Message

Turn this message into its raw representation

unsafe fn from_raw_c(
    obj: *mut c_void,
    opcode: u32,
    args: *const wl_argument
) -> Result<Self, ()>

Construct a message of this group from its C representation

Safety

The pointers provided to this function must all be valid pointers from libwayland-client

fn as_raw_c_in<F, T>(self, f: F) -> T where
    F: FnOnce(u32, &mut [wl_argument]) -> T, 

Build a C representation of this message

It can only be accessed from the provided closure, and this consumes the message.

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Implementors

impl MessageGroup for NoMessage

const MESSAGES: &'static [MessageDesc]

type Map = ()

fn is_destructor(&self) -> bool

fn opcode(&self) -> u16

fn since(&self) -> u32

fn child<M: ObjectMetadata>(_: u16, _: u32, _: &M) -> Option<Object<M>>

fn from_raw(_: Message, _: &mut ()) -> Result<Self, ()>

fn into_raw(self, _: u32) -> Message

unsafe fn from_raw_c(
    _obj: *mut c_void,
    _opcode: u32,
    _args: *const wl_argument
) -> Result<Self, ()>

fn as_raw_c_in<F, T>(self, _f: F) -> T where
    F: FnOnce(u32, &mut [wl_argument]) -> T, 

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