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use std::ffi::CString;
use libc;
use x11::xlib as x;
use {Cursor, Event, Visual, Window, X11Error};
pub struct Display {
inner: *mut x::Display,
}
pub struct Grab(pub(crate) *mut x::Display);
pub trait GetDisplay {
fn get_display(&self) -> *mut x::Display;
}
impl Display {
pub fn connect(display_name: impl AsRef<str>) -> Result<Display, X11Error> {
let display_name = CString::new(display_name.as_ref()).unwrap();
let inner = unsafe { x::XOpenDisplay(display_name.as_ptr()) };
if inner.is_null() {
return Err(X11Error::DisplayOpenError);
}
Ok(Display { inner })
}
pub fn from_handle(handle: u64) -> Self {
Display {
inner: handle as *mut x::Display,
}
}
pub fn grab(&self) -> Grab {
unsafe { x::XGrabServer(self.inner) };
Grab(self.inner)
}
pub fn create_font_cursor(&self, shape: u32) -> Result<Cursor, X11Error> {
let cursor = unsafe { x::XCreateFontCursor(self.inner, shape) as x::Cursor };
if cursor == 0 {
return Err(X11Error::CreateCursorError);
}
Ok(Cursor {
display: self.inner,
inner: cursor,
})
}
pub fn next_event(&self) -> Result<Event, X11Error> {
let event =
unsafe { libc::malloc(::std::mem::size_of::<x::XAnyEvent>()) as *mut x::XAnyEvent };
Event::from_raw(event)
}
pub fn pending(&self) -> Result<i32, X11Error> {
Ok(unsafe { x::XPending(self.inner) })
}
pub fn as_raw(&self) -> *mut x::Display {
self.inner
}
pub fn default_visual(&self, screen: i32) -> Visual {
let visual = unsafe { x::XDefaultVisual(self.inner, screen) };
Visual { inner: visual }
}
pub fn get_root_window(&self, screen: i32) -> Result<Window, X11Error> {
let inner = unsafe { x::XRootWindow(self.inner, screen) };
if inner == 0 {
return Err(X11Error::GetWindowError);
}
let window = Window {
display: self.inner,
inner,
};
Ok(window)
}
pub fn get_default_root_window(&self) -> Result<Window, X11Error> {
let inner = unsafe { x::XDefaultRootWindow(self.inner) };
if inner == 0 {
return Err(X11Error::GetWindowError);
}
let window = Window {
display: self.inner,
inner,
};
Ok(window)
}
pub fn translate_coordinates(
&self,
w1: Window,
x: i32,
y: i32,
w2: Window,
) -> Result<(i32, i32, Option<Window>), X11Error> {
let mut rx = 0;
let mut ry = 0;
let mut child_return: x::Window = 0;
let status = unsafe {
x::XTranslateCoordinates(
self.inner,
w1.inner,
w2.inner,
x,
y,
&mut rx,
&mut ry,
&mut child_return,
)
};
if status == 0 {
return Err(X11Error::TranslateCoordinatesError);
}
let child = match child_return {
0 => None,
val => Some(Window {
display: self.inner,
inner: val,
}),
};
Ok((rx, ry, child))
}
pub fn sync(&self, discard: bool) {
unsafe { x::XSync(self.inner, if discard { 1 } else { 0 }) };
}
pub fn get_input_focus(&self) -> Result<(Window, i32), X11Error> {
let mut focus_return: x::Window = 0;
let mut revert_to_return = 0;
unsafe { x::XGetInputFocus(self.inner, &mut focus_return, &mut revert_to_return) };
let window = Window {
display: self.inner,
inner: focus_return,
};
return Ok((window, revert_to_return));
}
}
impl Drop for Display {
fn drop(&mut self) {
unsafe { x::XCloseDisplay(self.inner) };
}
}
impl Drop for Grab {
fn drop(&mut self) {
unsafe { x::XUngrabServer(self.0) };
}
}