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# Wayland Module
This module is available since version 0.62.0, and has been stable since version
1.8.0.
This module provides helper functions to find wayland protocol
xmls and to generate .c and .h files using wayland-scanner
## Quick Usage
```meson
project('hello-wayland', 'c')
wl_dep = dependency('wayland-client')
wl_mod = import('wayland')
xml = wl_mod.find_protocol('xdg-shell')
xdg_shell = wl_mod.scan_xml(xml)
executable('hw', 'main.c', xdg_shell, dependencies : wl_dep)
```
## Methods
### find_protocol
```meson
xml = wl_mod.find_protocol(
'xdg-decoration',
state : 'unstable',
version : 1,
)
```
This function requires one positional argument: the protocol base name.
It takes the following keyword arguments:
- `state` Optional arg that specifies the current state of the protocol.
Either `'stable'`, `'staging'`, or `'unstable'`. The default is `'stable'`.
- `version` The backwards incompatible version number as integer.
Required for staging and unstable, but not allowed for stable.
**Returns**: a [[@file]] that can be passed to [scan_xml](#scan_xml)
### scan_xml
```meson
generated = wl_mod.scan_xml(
'my-protocol.xml',
client : true,
server : true,
public : false,
include_core_only : true,
)
```
This function accepts one or more arguments of either string or file type, so
it can be used in conjunction with `find_protocol` or not.
It takes the following keyword arguments:
- `public` Optional arg that specifies the scope of the generated code.
The default is false.
- `client` Optional arg that specifies if client side header file is
generated. The default is true.
- `server` Optional arg that specifies if server side header file is
generated. The default is false.
- `include_core_only` Optional arg that specifies that generated headers only include
`wayland-<client|server>-core.h` instead of `wayland-<client|server>.h`.
The default is true. Since *0.64.0*
**Returns**: a list of [[@custom_tgt]] in the order source, client side header,
server side header. Generated header files have the name
`<name>-<client|server>-protocol.h`.
## Links
- [Official Wayland Documentation](https://wayland.freedesktop.org/docs/html/)
- [Wayland GitLab](https://gitlab.freedesktop.org/wayland)
- [Wayland Book](https://wayland-book.com/)
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