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use x11::xlib;
use x11::xlib::{
Display,
XErrorEvent,
XEvent,
GrabModeAsync,
};
use safe_x11::{
open_display,
close_display,
grab_key,
};
use safe_x11::window::XWindow;
use std::ptr;
use std::process::exit;
use std::mem::uninitialized;
use std::collections::HashMap;
use libc::c_int;
#[allow(unused_variables)]
unsafe extern "C" fn error_handler(d: *mut Display, evptr: *mut XErrorEvent) -> c_int {
println!("ERRORR");
let ev = ptr::read(evptr);
if ev.error_code == xlib::BadAccess {
println!("Another widnow manager is running :C");
exit(1);
}
0
}
/// Defines a callback to call no certains events.
pub type ExecFn = fn(&DotWM, XEvent, &[String]) -> bool;
pub struct DotWM {
pub display: *mut Display,
// Map with the keys as (key, mod)
bindings: HashMap<(u32, u32), (ExecFn, Vec<String>)>,
cw_idx: usize,
pub window_list: Vec<XWindow>,
}
/// DotWM state.
impl DotWM {
/// Create a state of the Dot Window Manager
pub fn new() -> DotWM {
let d = open_display("").unwrap();
unsafe { xlib::XSetErrorHandler(Some(error_handler)) };
// Some testings.
unsafe {
let root = xlib::XDefaultRootWindow(d);
let mut attrs: xlib::XSetWindowAttributes = uninitialized();
attrs.event_mask = xlib::SubstructureNotifyMask;
xlib::XChangeWindowAttributes(d, root, xlib::CWEventMask, &mut attrs);
}
DotWM {
display: d,
bindings: HashMap::new(),
cw_idx: 0,
window_list: vec![],
}
}
/// Add a binding to the WM.
///
/// # Example
///
/// ```
/// fn exec(_: &DotWM, _: xlib::XEvent, args: &[String]) -> bool {
/// if let Some(program) = args.first() {
/// let mut prog_args = vec![];
/// for arg in args[1..].iter() {
/// prog_args.push(arg);
/// }
/// exec_cmd(program, prog_args.deref()).unwrap();
/// }
/// true
/// }
///
/// // ...
///
/// dotwm.add_binding(keysym::XK_Return, xlib::Mod4Mask, exec,
/// &["xterm"]);
/// ```
pub fn add_binding(&mut self, key: u32, modifiers: u32, func: ExecFn, args: &[&str]) {
grab_key(self.display, key, modifiers, true, GrabModeAsync, GrabModeAsync);
let mut v = vec![];
for arg in args {
v.push(arg.to_string());
}
self.bindings.insert((key, modifiers), (func, v));
}
pub fn exec_func(&mut self, key: u32, modifiers: u32, ev: xlib::XEvent) {
if let Some(&(func, ref args)) = self.bindings.get(&(key, modifiers)) {
let v = args.clone();
func(&self, ev, &v);
}
}
pub fn add_window(&mut self, w: xlib::Window) {
if let Some(w) = XWindow::new(self.display, w) {
self.window_list.push(w);
// Last windows get focus.
self.cw_idx = self.window_list.len() - 1;
}
}
pub fn current_window(&self) -> Option<&XWindow> {
if self.cw_idx < self.window_list.len() {
self.window_list.get(self.cw_idx)
} else {
None
}
}
pub fn remove_window(&mut self, w: xlib::Window) {
let pos = self.window_list.iter().position(|xw| xw.inner == w);
match pos {
Some(idx) => {
self.window_list.remove(idx);
self.cw_idx = usize::max_value();
},
None => (),
}
}
}
impl Drop for DotWM {
fn drop(&mut self) {
println!("Closing display");
close_display(self.display);
}
}
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