Cthulhu support updated to use d-bus.

Toby Doom Launcher.py

@@ -180,6 +180,137 @@ class OrcaRemoteController:
             return False
 
 
+class CthulhuRemoteController:
+    """D-Bus interface for Cthulhu screen reader remote control using dasbus library"""
+    _instance = None
+    _availability_checked = False
+    _is_available = False
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+        return cls._instance
+
+    def __init__(self):
+        if self._availability_checked:
+            return
+        self.service_name = "org.stormux.Cthulhu.Service"
+        self.main_path = "/org/stormux/Cthulhu/Service"
+        self.proxy = None
+        self.speech_proxy = None
+        self.available = self._test_availability()
+        CthulhuRemoteController._is_available = self.available
+        CthulhuRemoteController._availability_checked = True
+
+    def _call_with_timeout(self, func, timeout_seconds=2):
+        """Execute a function with timeout using threading"""
+        result = [None]
+        exception = [None]
+
+        def wrapper():
+            try:
+                result[0] = func()
+            except Exception as e:
+                exception[0] = e
+
+        thread = threading.Thread(target=wrapper, daemon=True)
+        thread.start()
+        thread.join(timeout=timeout_seconds)
+
+        if thread.is_alive():
+            # Timeout occurred
+            return None
+        if exception[0]:
+            raise exception[0]
+        return result[0]
+
+    def _get_cthulhu_dbus_address(self):
+        """Try to find Cthulhu's D-Bus session address from its process"""
+        try:
+            # Find Cthulhu process
+            result = subprocess.run(
+                ["pgrep", "-x", "cthulhu"],
+                capture_output=True,
+                text=True,
+                timeout=1
+            )
+            if result.returncode == 0:
+                pid = result.stdout.strip().split('\n')[0]
+                # Read Cthulhu's environment
+                with open(f"/proc/{pid}/environ", 'r') as f:
+                    environ = f.read()
+                    for var in environ.split('\0'):
+                        if var.startswith('DBUS_SESSION_BUS_ADDRESS='):
+                            return var.split('=', 1)[1]
+        except Exception:
+            pass
+        return None
+
+    def _test_availability(self):
+        """Test if Cthulhu remote controller is available"""
+        def test_connection():
+            from dasbus.connection import SessionMessageBus
+
+            # First try with current session bus
+            try:
+                bus = SessionMessageBus()
+                self.proxy = bus.get_proxy(self.service_name, self.main_path)
+                self.proxy.ListCommands()
+                self.speech_proxy = bus.get_proxy(
+                    self.service_name,
+                    f"{self.main_path}/SpeechAndVerbosityManager"
+                )
+                return True
+            except Exception:
+                # If that fails, try to find Cthulhu's D-Bus session
+                cthulhu_bus_address = self._get_cthulhu_dbus_address()
+                if cthulhu_bus_address:
+                    # Temporarily set the environment variable
+                    old_address = os.environ.get('DBUS_SESSION_BUS_ADDRESS')
+                    try:
+                        os.environ['DBUS_SESSION_BUS_ADDRESS'] = cthulhu_bus_address
+                        bus = SessionMessageBus()
+                        self.proxy = bus.get_proxy(self.service_name, self.main_path)
+                        self.proxy.ListCommands()
+                        self.speech_proxy = bus.get_proxy(
+                            self.service_name,
+                            f"{self.main_path}/SpeechAndVerbosityManager"
+                        )
+                        return True
+                    finally:
+                        # Restore original address
+                        if old_address:
+                            os.environ['DBUS_SESSION_BUS_ADDRESS'] = old_address
+                        elif 'DBUS_SESSION_BUS_ADDRESS' in os.environ:
+                            del os.environ['DBUS_SESSION_BUS_ADDRESS']
+                raise
+
+        try:
+            return self._call_with_timeout(test_connection, timeout_seconds=2) or False
+        except Exception:
+            return False
+
+    def present_message(self, message):
+        """Present a message via Cthulhu speech/braille output"""
+        if not self.available or not self.proxy:
+            return False
+
+        try:
+            return self._call_with_timeout(lambda: self.proxy.PresentMessage(message), timeout_seconds=2) or False
+        except Exception:
+            return False
+
+    def interrupt_speech(self):
+        """Interrupt current speech via SpeechAndVerbosityManager"""
+        if not self.available or not self.speech_proxy:
+            return False
+
+        try:
+            return self._call_with_timeout(lambda: self.speech_proxy.ExecuteCommand("InterruptSpeech", False), timeout_seconds=2) or False
+        except Exception:
+            return False
+
+
 # Initialize speech provider based on platform
 if platform.system() == "Windows":
     # Set up DLL paths for Windows
@@ -213,11 +344,12 @@ else:
             speechProvider = "orca_remote"
             orca = orca_remote
         else:
-            # Fall back to Cthulhu
+            # Fall back to Cthulhu remote controller
-            try:
+            cthulhu_remote = CthulhuRemoteController()
-                output = subprocess.check_output(["pgrep", "cthulhu"])
+            if cthulhu_remote.available:
-                speechProvider = "cthulhu"
+                speechProvider = "cthulhu_remote"
-            except (subprocess.CalledProcessError, FileNotFoundError):
+                cthulhu = cthulhu_remote
+            else:
                 try:
                     import accessible_output2.outputs.auto
                     s = accessible_output2.outputs.auto.Auto()
@@ -348,23 +480,16 @@ class SpeechHandler:
             orca.interrupt_speech()
             if not orca.present_message(text):
                 print(f"Orca remote error - message not delivered", file=sys.stderr)
+        elif speechProvider == "cthulhu_remote":
+            # Try Cthulhu, interrupt current speech then present message
+            cthulhu.interrupt_speech()
+            if not cthulhu.present_message(text):
+                print(f"Cthulhu remote error - message not delivered", file=sys.stderr)
         elif speechProvider == "speechd":
             spd.cancel()
             spd.speak(text)
         elif speechProvider == "accessible_output2":
             s.speak(text, interrupt=True)
-        else:  # Cthulhu
-            try:
-                process = subprocess.Popen(
-                    ["socat", "-", "UNIX-CLIENT:/tmp/cthulhu.sock"],
-                    stdin=subprocess.PIPE,
-                    stdout=subprocess.PIPE,
-                    stderr=subprocess.PIPE,
-                    text=True
-                )
-                process.communicate(input=text)
-            except Exception as e:
-                print(f"Cthulhu error: {e}", file=sys.stderr)
 
     def process_line(self, line: str) -> Optional[str]:
         """Process a line of game output for speech"""
@@ -2152,12 +2277,10 @@ class DoomLauncher(QMainWindow):
             if orca_remote.available:
                 available_providers.append("orca_remote")
             
-            # Check Cthulhu
+            # Check Cthulhu remote controller
-            try:
+            cthulhu_remote = CthulhuRemoteController()
-                subprocess.check_output(["pgrep", "cthulhu"])
+            if cthulhu_remote.available:
-                available_providers.append("cthulhu")
+                available_providers.append("cthulhu_remote")
-            except (subprocess.CalledProcessError, FileNotFoundError):
-                pass
             
             # Check accessible_output2
             try:
@@ -2176,7 +2299,7 @@ class DoomLauncher(QMainWindow):
         provider_names = {
             "accessible_output2": "Accessible Output2",
             "orca_remote": "Orca Remote",
-            "cthulhu": "Cthulhu",
+            "cthulhu_remote": "Cthulhu Remote",
             "speechd": "Speech Dispatcher"
         }
         
@@ -2211,7 +2334,7 @@ class DoomLauncher(QMainWindow):
 
     def set_speech_provider(self, provider: str):
         """Update the global speech provider"""
-        global speechProvider, s, spd, orca
+        global speechProvider, s, spd, orca, cthulhu
 
         try:
             if provider == "accessible_output2":
@@ -2226,12 +2349,13 @@ class DoomLauncher(QMainWindow):
                 else:
                     QMessageBox.warning(self, "Error", "Orca Remote is not available")
                     return
-            elif provider == "cthulhu":
+            elif provider == "cthulhu_remote":
-                try:
+                cthulhu_remote = CthulhuRemoteController()
-                    subprocess.check_output(["pgrep", "cthulhu"])
+                if cthulhu_remote.available:
-                    speechProvider = "cthulhu"
+                    cthulhu = cthulhu_remote
-                except (subprocess.CalledProcessError, FileNotFoundError):
+                    speechProvider = "cthulhu_remote"
-                    QMessageBox.warning(self, "Error", "Cthulhu is not running")
+                else:
+                    QMessageBox.warning(self, "Error", "Cthulhu Remote is not available")
                     return
             elif provider == "speechd":
                 import speechd