From b069fa7e4658f6616221da718b0a3cf959cbd5b0 Mon Sep 17 00:00:00 2001
From: Adham Ramy <adhamramy0@gmail.com>
Date: Thu, 21 Dec 2023 13:25:24 +0300
Subject: [PATCH] Do not manage non-responding windows

adds check for Hung windows in `ismanageable()` and calls `unmanage()`.

The `WM_TIMER` calls the `IsHungAppWindow` on all the managed windows at the user defined interval, and calls `unmanage()`
---
 src/dwm-win32.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/dwm-win32.c b/src/dwm-win32.c
index 0831cea..a9494f5 100644
--- a/src/dwm-win32.c
+++ b/src/dwm-win32.c
@@ -725,6 +725,10 @@ ismanageable(HWND hwnd) {
     if (hwnd == 0)
         return false;
 
+    if (IsHungAppWindow(hwnd)) {
+        return false;
+    }
+    
     if (getclient(hwnd))
         return true;
 
@@ -860,6 +864,12 @@ manage(HWND hwnd) {
     c->iscloaked = iscloaked(hwnd);
     c->isminimized = IsIconic(hwnd);
 
+    // Check if the window is hung
+    if (IsHungAppWindow(hwnd)) {
+        unmanage(c);
+        return NULL;
+    }
+
     static WINDOWPLACEMENT wp = {
         .length = sizeof(WINDOWPLACEMENT),
         .showCmd = SW_RESTORE,
@@ -972,7 +982,18 @@ LRESULT CALLBACK barhandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
             buttonpress(msg, &MAKEPOINTS(lParam));
             break;
         case WM_TIMER:
+            // check for hung windows every time the timer runs
+            // Iterate over all managed windows
+            for (Client* c = clients; c; c = c->next) {
+                // Check if the window is hung
+                if (IsHungAppWindow(c->hwnd)) {
+                    // Unmanage the window
+                    unmanage(c);
+                }
+            }
+
             drawbar();
+
         default:
             return DefWindowProc(hwnd, msg, wParam, lParam); 
     }