wzrd

An ICCCM & EWMH compliant X11 reparenting, dynamic window manager, written in Rust
git clone git://git.deurzen.net/wzrd
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consume.rs (1245B)

      1 use crate::client::Client;
      2 use crate::util::BuildIdHasher;
      3 
      4 use winsys::connection::Pid;
      5 use winsys::window::Window;
      6 
      7 use std::collections::HashMap;
      8 use std::fs;
      9 
     10 fn get_parent_pid(pid: Pid) -> Option<Pid> {
     11     if let Ok(stat) = fs::read_to_string(format!("/proc/{}/stat", pid)) {
     12         let stat = stat.split(" ").collect::<Vec<&str>>();
     13         return stat.get(3).and_then(|ppid| ppid.parse::<Pid>().ok());
     14     }
     15 
     16     None
     17 }
     18 
     19 pub fn get_spawner_pid(
     20     pid: Pid,
     21     wm_pid: Pid,
     22     pid_map: &HashMap<Pid, Window>,
     23     client_map: &HashMap<Window, Client, BuildIdHasher>,
     24 ) -> Option<Pid> {
     25     let mut ppid = get_parent_pid(pid);
     26 
     27     while ppid.is_some() {
     28         let ppid_new = get_parent_pid(ppid.unwrap());
     29 
     30         let mut is_consumer = false;
     31         if let Some(ppid_new) = ppid_new {
     32             if let Some(window) = pid_map.get(&ppid_new) {
     33                 if let Some(client) = client_map.get(&window) {
     34                     is_consumer = client.is_consuming();
     35                 }
     36             }
     37         };
     38 
     39         if is_consumer {
     40             return ppid_new;
     41         }
     42 
     43         if ppid_new == Some(wm_pid) {
     44             return if ppid == Some(pid) { None } else { ppid };
     45         }
     46 
     47         ppid = ppid_new;
     48     }
     49 
     50     None
     51 }