Harden DWM plugins against X11 stacking/keyboard grab races and speed up QMI status

src/dwm-plugins/calllog_plugin.cpp

@@ -333,6 +333,7 @@ int calllog_run_main(int argc, char** argv) {
   XSync(dpy, False);
 
   auto showWindow = [&]() {
+    writeIntFile(activePidPath, static_cast<int>(::getpid()));
     closeOtherPlugins("calllog");
     bool themeChanged = theme.checkAndReload(
         dpy, screen, visual, cmap, layoutMain, layoutSmall, layoutIcon,
@@ -348,13 +349,7 @@ int calllog_run_main(int argc, char** argv) {
       if (!themeChanged) {
         XCopyArea(dpy, pix, win, gc, 0, 0, kWinWidth, kWinHeight, 0, 0);
       }
-      for (int i = 0; i < 20; ++i) {
-        if (XGrabKeyboard(dpy, win, True, GrabModeAsync, GrabModeAsync, CurrentTime) ==
-            GrabSuccess) {
-          break;
-        }
-        usleep(2000);
-      }
+      grabPluginKeyboard(dpy, win);
       if (reloadLogsIfNeeded() || themeChanged || filterTab != 0 || selected != 0) {
         filterTab = 0;
         selected = 0;
@@ -362,8 +357,9 @@ int calllog_run_main(int argc, char** argv) {
         render();
       }
       XFlush(dpy);
-      writeIntFile(activePidPath, static_cast<int>(::getpid()));
     } else {
+      XRaiseWindow(dpy, win);
+      grabPluginKeyboard(dpy, win);
       if (reloadLogsIfNeeded() || themeChanged) {
         render();
       }
@@ -444,6 +440,15 @@ int calllog_run_main(int argc, char** argv) {
         if (ev.xexpose.count == 0) {
           render();
         }
+      } else if (ev.type == VisibilityNotify &&
+                 ev.xvisibility.state != VisibilityUnobscured) {
+        if (isAnotherPluginActive("calllog")) {
+          hideWindow(false);
+        } else {
+          XRaiseWindow(dpy, win);
+          grabPluginKeyboard(dpy, win);
+          render();
+        }
       } else if (ev.type == KeyRelease) {
         KeySym sym = XLookupKeysym(&ev.xkey, 0);
         if (sym == XK_Menu || sym == XF86XK_KbdLcdMenu1 ||