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// See LICENSE file for copyright and license details.
use x11::xlib;
use x11::xlib::{
Display,
XErrorEvent,
};
use safe_x11::{
open_display,
close_display,
};
use safe_x11::window::XWindow;
use std::ptr;
use std::process::exit;
use std::mem::uninitialized;
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
}
pub struct DotWM {
/// Reference to the X display.
pub display: *mut Display,
/// References to all the windows.
pub window_list: Vec<XWindow>,
// Map with the keys as (key, mod)
cw_idx: usize,
}
/// 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,
cw_idx: 0,
window_list: vec![],
}
}
pub fn add_window(&mut self, w: xlib::Window) {
self.unfocus_current_window();
if let Some(w) = XWindow::new(self.display, w) {
w.select_input(xlib::EnterWindowMask);
self.window_list.push(w);
// Last windows get focus.
self.cw_idx = self.window_list.len() - 1;
self.focus_current_window();
}
}
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) => {
let new_idx = if idx == 0 { usize::max_value() } else { idx - 1 };
self.window_list.remove(idx);
self.cw_idx = new_idx;
self.focus_current_window();
},
None => (),
}
}
pub fn change_focus_of(&mut self, idx: usize) {
let w = &self.window_list[idx];
self.unfocus_current_window();
self.cw_idx = idx;
w.set_border_width(1);
w.set_border_color("red");
w.raise();
}
/// Find a given window and returns it's position on the window_list.
pub fn find_window(&self, w: xlib::Window) -> Option<usize> {
self.window_list.iter().position(|xw| xw.inner == w)
}
/// Focus the next window.
///
/// There're 3 posibilities. There's no window, there's one window or there
/// are more windows.
pub fn focus_next(&mut self) {
if self.window_list.len() > 0 {
// Unfocus the current window.
let prev_win = &self.window_list[self.cw_idx];
prev_win.unfocus();
// And give focus to the next one.
let next_win_idx = if self.cw_idx < self.window_list.len() - 1 {
self.cw_idx + 1
} else {
0
};
let curr_win = &self.window_list[next_win_idx];
curr_win.focus();
self.cw_idx = next_win_idx;
}
}
fn focus_current_window(&self) {
self.current_window().map(|x| x.focus());
}
fn unfocus_current_window(&self) {
self.current_window().map(|x| x.unfocus());
}
}
impl Drop for DotWM {
fn drop(&mut self) {
println!("Closing display");
close_display(self.display);
}
}
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