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use std::thread;
use std::time::Duration;
use serde::{Deserialize, Serialize};
mod animations;
use animations::Animation;
#[derive(Serialize, Deserialize)]
enum Kind {
Grow,
GrowOutline,
Shrink,
ShrinkOutline,
}
#[derive(Serialize, Deserialize)]
pub struct IndicatorConfig {
max_size: u16, // display pixels
duration: u64, // milliseconds
thickness: u32, // display pixels
framerate: u16, // number of circles to display
color: u32, // color in hex, eg.: 0x00FECA
animation: Kind, // 'Grow' | 'Shrink' | 'GrowOutline' | 'ShrinkOutline'
}
// sane defaults
impl std::default::Default for IndicatorConfig {
fn default() -> IndicatorConfig {
IndicatorConfig {
max_size: 300u16,
duration: 500u64,
thickness: 1,
framerate: 30,
color: 0xFFFFFF,
animation: Kind::Grow,
}
}
}
fn main() {
let config: IndicatorConfig = confy::load("xcursorlocate").unwrap();
let padding = config.thickness as u16; // (???) largest circle gets clipped
let win_size = config.max_size + padding;
let (conn, screen_num) = xcb::Connection::connect(None)
.unwrap_or_else(|e| panic!("Unable to connect to X session: {}", e));
let setup = conn.get_setup();
let screen = setup
.roots()
.nth(screen_num as usize)
.unwrap_or_else(|| panic!("Error accessing screen!"));
// fetch all depths
let depths = screen.allowed_depths();
let mut alpha_depths = depths.filter(|d| d.depth() == 32u8).peekable();
if alpha_depths.peek().is_none() {
panic!("Alpha channel not found!");
}
// fetch a visual supporting alpha channels
let visual = alpha_depths
.next()
.unwrap()
.visuals()
.nth(1 as usize)
.unwrap();
let win_start_x = 0;
let win_start_y = 0;
let colormap = conn.generate_id();
xcb::create_colormap(
&conn,
xcb::COLORMAP_ALLOC_NONE as u8,
colormap,
screen.root(),
visual.visual_id(),
);
let win = conn.generate_id();
xcb::create_window(
&conn,
32u8,
win,
screen.root(),
win_start_x,
win_start_y,
win_size,
win_size,
0,
xcb::WINDOW_CLASS_INPUT_OUTPUT as u16,
visual.visual_id(),
&[
(xcb::CW_BACK_PIXEL, 0x00),
(xcb::CW_BORDER_PIXEL, 0x00), // you need this if you use alpha apparently
(xcb::CW_OVERRIDE_REDIRECT, 1u32), // dont take focus
(xcb::CW_EVENT_MASK, xcb::EVENT_MASK_EXPOSURE),
(xcb::CW_COLORMAP, colormap),
],
);
let gfx_ctx = conn.generate_id();
xcb::create_gc(
&conn,
gfx_ctx,
win,
&[
(xcb::GC_FOREGROUND, config.color),
(xcb::GC_GRAPHICS_EXPOSURES, 0),
(xcb::GC_LINE_WIDTH, config.thickness),
],
);
xcb::free_colormap(&conn, colormap);
let win_type_atom = xcb::intern_atom(&conn, true, "_NET_WM_WINDOW_TYPE")
.get_reply()
.unwrap()
.atom();
let win_menu_atom = xcb::intern_atom(&conn, true, "_NET_WM_WINDOW_TYPE_SPLASH")
.get_reply()
.unwrap()
.atom();
let win_state_atom = xcb::intern_atom(&conn, true, "_NET_WM_STATE")
.get_reply()
.unwrap()
.atom();
let win_on_top_atom = xcb::intern_atom(&conn, true, "_NET_WM_STATE_STAYS_ON_TOP")
.get_reply()
.unwrap()
.atom();
xcb::change_property(
&conn,
xcb::PROP_MODE_REPLACE as u8,
win,
win_type_atom,
xcb::ATOM_ATOM,
32,
&[win_menu_atom],
);
xcb::change_property(
&conn,
xcb::PROP_MODE_APPEND as u8,
win,
win_state_atom,
xcb::ATOM_ATOM,
32,
&[win_on_top_atom],
);
let fr = config.framerate;
let animation = match config.animation {
Kind::Grow => Animation::circles(config, Box::new((0..fr).rev()), false),
Kind::GrowOutline => Animation::circles(config, Box::new((0..fr).rev()), true),
Kind::Shrink => Animation::circles(config, Box::new(0..fr), false),
Kind::ShrinkOutline => Animation::circles(config, Box::new(0..fr), true),
};
xcb::map_window(&conn, win);
conn.flush();
// wait till window is mapped
let event = conn.wait_for_event();
match event {
None => {}
Some(e) => {
let r = e.response_type() & !0x80;
match r {
// the window is mapped to display
xcb::EXPOSE => {
let pointer = xcb::query_pointer(&conn, win).get_reply().unwrap();
let p_x = pointer.root_x();
let p_y = pointer.root_y();
move_win_to_cursor(&conn, win, win_size, p_x, p_y);
animation.play(&conn, win, gfx_ctx);
thread::sleep(Duration::from_millis(100));
}
_ => eprintln!("how did you even get here: {}", r),
}
}
}
}
fn move_win_to_cursor(
conn: &xcb::Connection,
win: u32,
win_size: u16,
p_x: i16,
p_y: i16,
) -> (u32, u32) {
let win_x = p_x - (win_size as i16) / 2;
let win_y = p_y - (win_size as i16) / 2;
let win_x = if win_x < 0 { 0 } else { win_x as u32 };
let win_y = if win_y < 0 { 0 } else { win_y as u32 };
xcb::configure_window(
&conn,
win,
&[
(xcb::CONFIG_WINDOW_X as u16, win_x),
(xcb::CONFIG_WINDOW_Y as u16, win_y),
],
);
conn.flush();
return (win_x, win_y);
}
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