From 02d676bda89c2fb8469ea81f7429c19c1e29df7c Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@dailly.me>
Date: Sat, 15 Jul 2023 14:44:41 +0200
Subject: Initial commit

---
 xlib.py | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 xlib.py

(limited to 'xlib.py')

diff --git a/xlib.py b/xlib.py
new file mode 100644
index 0000000..b86a8b1
--- /dev/null
+++ b/xlib.py
@@ -0,0 +1,62 @@
+#!/usr/bin/python3
+import Xlib
+import Xlib.display
+
+from zope import interface
+from interfaces import desktopEvent
+from threading import Thread
+
+from interfaces.message import IMessage, Debug
+from zope import component
+
+@interface.implementer(desktopEvent.IDesktop)
+class Listener(Thread):
+
+    def __init__(self, mapping, queue):
+        Thread.__init__(self)
+        self.queue = queue
+        self.mapping = mapping
+        self.active_window = None
+        self.last_code = None
+        self.running = False
+
+    def getForegroundWindowTitle(self):
+        """ Return the name of the selected window
+        """
+        return self.active_window
+
+    def run(self):
+        disp = Xlib.display.Display()
+        NET_WM_NAME = disp.intern_atom('_NET_WM_NAME')
+        WM_CLASS = disp.intern_atom('WM_CLASS')
+        NET_ACTIVE_WINDOW = disp.intern_atom('_NET_ACTIVE_WINDOW')
+        root = disp.screen().root
+        root.change_attributes(event_mask=Xlib.X.PropertyChangeMask)
+
+        component.handle(Debug("Waiting for xlib event"))
+        self.running = True
+        while self.running:
+            try:
+                window_id = root.get_full_property(NET_ACTIVE_WINDOW, Xlib.X.AnyPropertyType).value[0]
+                window = disp.create_resource_object('window', window_id)
+                window.change_attributes(event_mask=Xlib.X.PropertyChangeMask)
+                window_name = str(window.get_full_property(NET_WM_NAME, 0).value).lower()
+                class_name = str(window.get_full_property(WM_CLASS, 0).value).lower()
+            except Xlib.error.XError:
+                window_name = None
+                class_name = None
+
+            if window_name is not None and window_name != self.active_window:
+
+                self.active_window = window_name
+                for pattern, code in self.mapping.items():
+                    if (pattern in window_name or pattern in class_name) and code != self.last_code:
+
+                        component.handle(Debug("Switching to '%s' for '%s'" % (code, window_name)))
+                        self.queue.put ( (code, None) )
+                        self.last_code = code
+                        break
+            event = disp.next_event()
+
+    def stop(self):
+        self.running = False
-- 
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