248 lines
7.9 KiB
Rust
248 lines
7.9 KiB
Rust
// Copyright (C) 2022 Infoshock Tech
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#![warn(clippy::pedantic)]
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use std::fmt::{Debug, Display};
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use breadx::{
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auto::xproto::{GrabKeyRequest, GrabMode, KeyButMask, ModMask},
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keyboard::KeyboardState,
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prelude::{AsyncDisplay, AsyncDisplayXprotoExt, MapState},
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traits::DisplayBase,
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AsyncDisplayConnection, AsyncDisplayExt, BreadError, ConfigureWindowParameters, Event,
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EventMask, Window,
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};
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use lazy_static::lazy_static;
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use tokio::sync::mpsc::unbounded_channel;
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mod config;
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mod msg_listener;
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mod x11;
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use x11::client::{may_not_exist, XcrabWindowManager};
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#[derive(thiserror::Error)]
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#[non_exhaustive]
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pub enum XcrabError {
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#[error("breadx error: {0}")]
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Bread(#[from] BreadError),
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#[error("io error: {0}")]
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Io(#[from] std::io::Error),
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#[error("toml error: {0}")]
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Toml(#[from] toml::de::Error),
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#[error("env var error: {0}")]
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Var(#[from] std::env::VarError),
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#[error("client doesnt exist")]
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ClientDoesntExist,
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#[error("{0}")]
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Custom(String),
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}
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lazy_static! {
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pub static ref CONFIG: config::XcrabConfig = config::load_file().unwrap_or_else(|e| {
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println!("[CONFIG] Error parsing config: {e}");
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println!("[CONFIG] Falling back to default config");
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config::XcrabConfig::default()
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});
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}
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impl Debug for XcrabError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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Display::fmt(self, f)
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}
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}
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type Result<T> = std::result::Result<T, XcrabError>;
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#[tokio::main]
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async fn main() -> Result<()> {
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// connect to the x server
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let mut conn = AsyncDisplayConnection::create_async(None, None).await?;
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let root = conn.default_root();
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// listen for substructure redirects to intercept events like window creation
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root.set_event_mask_async(
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&mut conn,
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EventMask::SUBSTRUCTURE_REDIRECT | EventMask::SUBSTRUCTURE_NOTIFY | EventMask::KEY_PRESS,
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)
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.await?;
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let mut manager = XcrabWindowManager::new();
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conn.grab_server_async().await?;
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let top_level_windows = root.query_tree_immediate_async(&mut conn).await?.children;
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for &win in top_level_windows.iter() {
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let attrs = win.window_attributes_immediate_async(&mut conn).await?;
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if !attrs.override_redirect && attrs.map_state == MapState::Viewable {
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manager.add_client(&mut conn, win).await?;
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}
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}
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conn.ungrab_server_async().await?;
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let mut mask = ModMask::new(false, false, true, false, false, false, false, false, false);
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let mut keyboard_state = KeyboardState::new_async(&mut conn).await?;
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let keymap = x11::client::keymap(&mut keyboard_state);
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let mut request_key = *keymap.get(&120).ok_or_else(|| {
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XcrabError::Custom("At least one letter could not be found in the keymap".to_string())
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})?;
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for &binds in CONFIG.binds.keys() {
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for keysym in 97..122_u32 {
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let keycode = keymap.get(&keysym).ok_or_else(|| {
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XcrabError::Custom(
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"At least one letter could not be found in the keymap".to_string(),
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)
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})?;
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let iter_char = keyboard_state
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.process_keycode(*keycode, KeyButMask::default())
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.ok_or_else(|| {
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XcrabError::Custom(
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"The keycode returned from the keymap could not be processed".to_string(),
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)
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})?
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.as_char()
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.ok_or_else(|| {
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XcrabError::Custom("The processed Key could not be cast as a char".to_string())
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})?;
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if iter_char == binds.key {
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request_key = *keycode;
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mask.inner = binds.mods.inner;
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}
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}
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}
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mask.set_Two(true);
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conn.exchange_request_async(GrabKeyRequest {
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req_type: 33,
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owner_events: false,
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length: 4,
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grab_window: root,
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modifiers: mask,
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key: request_key,
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pointer_mode: GrabMode::Async,
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keyboard_mode: GrabMode::Async,
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})
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.await?;
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mask.set_Two(false);
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conn.exchange_request_async(GrabKeyRequest {
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req_type: 33,
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owner_events: false,
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length: 4,
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grab_window: root,
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modifiers: mask,
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key: request_key,
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pointer_mode: GrabMode::Async,
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keyboard_mode: GrabMode::Async,
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})
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.await?;
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let (send, mut recv) = unbounded_channel();
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let (result_send, result_recv) = unbounded_channel();
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tokio::spawn(msg_listener::listener_task(
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CONFIG.msg.clone().unwrap_or_default().socket_path,
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send,
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result_recv,
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));
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loop {
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// biased mode makes select! poll the channel first in order to keep xcrab-msg from being
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// starved by x11 events. Probably unnecessary, but better safe than sorry.
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tokio::select! {
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biased;
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Some(s) = recv.recv() => msg_listener::on_recv(s, &mut manager, &mut conn, &result_send).await?,
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Ok(ev) = conn.wait_for_event_async() => process_event(ev, &mut manager, &mut conn, root, &mut keyboard_state).await?,
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}
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}
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}
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#[allow(clippy::too_many_lines)]
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async fn process_event<Dpy: AsyncDisplay + ?Sized>(
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ev: Event,
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manager: &mut XcrabWindowManager,
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conn: &mut Dpy,
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root: Window,
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keyboard_state: &mut KeyboardState,
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) -> Result<()> {
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match ev {
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Event::MapRequest(ev) => {
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manager.add_client(conn, ev.window).await?;
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}
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Event::ConfigureRequest(ev) => {
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// copy from `ev` to `params`
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let mut params = ConfigureWindowParameters {
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x: Some(ev.x.into()),
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y: Some(ev.y.into()),
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width: Some(ev.width.into()),
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height: Some(ev.height.into()),
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border_width: Some(ev.border_width.into()),
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// without this, it will error when a window tries to set a sibling that is
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// not actually a sibling? idk, all i know is that without it, xterm crashes
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sibling: None,
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stack_mode: Some(ev.stack_mode),
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};
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// if this is a client, deny changing position or size (we are a tiling wm!)
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if manager.has_client(ev.window) {
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params.x = None;
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params.y = None;
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params.width = None;
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params.height = None;
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}
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// forward the request
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// by the time we get here someone may have already deleted their window
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may_not_exist(ev.window.configure_async(conn, params).await)?;
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}
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Event::UnmapNotify(ev) => {
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if ev.event != root && manager.has_client(ev.window) {
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manager.remove_client(conn, ev.window).await?;
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}
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}
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Event::ButtonPress(ev) => {
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if ev.detail == 1 {
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manager.set_focus(conn, ev.event).await?;
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}
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}
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Event::KeyPress(ev) => {
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if let Some(k) = keyboard_state.process_keycode(ev.detail, ev.state) {
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if let Some(c) = k.as_char() {
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for (&bind, action) in &CONFIG.binds {
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if bind.key == c {
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action.eval(manager, conn).await?;
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}
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}
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}
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}
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}
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_ => {}
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}
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Ok(())
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}
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