Try to improve window title reading.

src/cthulhu/plugins/WindowTitleReader/plugin.py

@@ -24,6 +24,7 @@ import logging
 
 from gi.repository import GLib
 
+from cthulhu.ax_object import AXObject
 from cthulhu import debug
 from cthulhu import dbus_service
 from cthulhu.plugin import Plugin, cthulhu_hookimpl
@@ -53,6 +54,9 @@ class WindowTitleReader(Plugin):
         self._enabled = False
         self._pollSourceId = None
         self._pollIntervalMs = 100
+        self._fallbackDelayMs = 250
+        self._pendingFallbackSourceId = None
+        self._lastActiveWindowId = None
         self._lastTitle = None
         self._display = None
         self._root = None
@@ -71,6 +75,13 @@ class WindowTitleReader(Plugin):
             return True
 
         self._register_keybinding()
+        self.app.getDynamicApiManager().registerAPI(
+            "WindowTitleReader",
+            self,
+            overwrite=True,
+        )
+        if xlibAvailable:
+            self._start_tracking()
         self._activated = True
         debug.printMessage(debug.LEVEL_INFO, "WindowTitleReader: Activated", True)
         return True
@@ -81,6 +92,8 @@ class WindowTitleReader(Plugin):
             return
 
         self._stop_tracking()
+        if self.app:
+            self.app.getDynamicApiManager().unregisterAPI("WindowTitleReader")
         self._activated = False
         debug.printMessage(debug.LEVEL_INFO, "WindowTitleReader: Deactivated", True)
         return True
@@ -118,7 +131,8 @@ class WindowTitleReader(Plugin):
 
     def _toggle_tracking(self, script=None, inputEvent=None):
         if self._enabled:
-            self._stop_tracking()
+            self._enabled = False
+            self._lastTitle = None
             self._present_message("Window title reader off")
             return True
 
@@ -132,6 +146,8 @@ class WindowTitleReader(Plugin):
             return True
 
         if self._start_tracking():
+            self._enabled = True
+            self._poll_window_title()
             self._present_message("Window title reader on")
         else:
             self._present_message("Window title reader unavailable")
@@ -162,6 +178,8 @@ class WindowTitleReader(Plugin):
                 return False
 
             if self._start_tracking():
+                self._enabled = True
+                self._poll_window_title()
                 if notify_user:
                     self._present_message("Window title reader on")
                 return True
@@ -171,7 +189,8 @@ class WindowTitleReader(Plugin):
             return False
 
         if self._enabled:
-            self._stop_tracking()
+            self._enabled = False
+            self._lastTitle = None
 
         if notify_user:
             self._present_message("Window title reader off")
@@ -195,7 +214,7 @@ class WindowTitleReader(Plugin):
             pluginLogger.exception("WindowTitleReader: Failed to present message")
 
     def _start_tracking(self):
-        if self._enabled:
+        if self._pollSourceId is not None:
             return True
 
         try:
@@ -203,7 +222,6 @@ class WindowTitleReader(Plugin):
             self._root = self._display.screen().root
             self._init_atoms()
             self._pollSourceId = GLib.timeout_add(self._pollIntervalMs, self._poll_window_title)
-            self._enabled = True
             self._poll_window_title()
             return True
         except Exception as error:
@@ -217,11 +235,16 @@ class WindowTitleReader(Plugin):
             return False
 
     def _stop_tracking(self):
+        if self._pendingFallbackSourceId is not None:
+            GLib.source_remove(self._pendingFallbackSourceId)
+            self._pendingFallbackSourceId = None
+
         if self._pollSourceId is not None:
             GLib.source_remove(self._pollSourceId)
             self._pollSourceId = None
 
         self._enabled = False
+        self._lastActiveWindowId = None
         self._lastTitle = None
         self._cleanup_display()
 
@@ -246,7 +269,7 @@ class WindowTitleReader(Plugin):
         }
 
     def _poll_window_title(self):
-        if not self._enabled:
+        if self._pollSourceId is None:
             return False
 
         try:
@@ -260,7 +283,14 @@ class WindowTitleReader(Plugin):
                 self._lastTitle = None
                 return True
 
-            if windowTitle != self._lastTitle:
+            activeWindowId = activeWindow.id
+            if self._lastActiveWindowId is None:
+                self._lastActiveWindowId = activeWindowId
+            elif activeWindowId != self._lastActiveWindowId:
+                self._lastActiveWindowId = activeWindowId
+                self._schedule_fallback_title()
+
+            if self._enabled and windowTitle != self._lastTitle:
                 self._present_title(windowTitle)
                 self._lastTitle = windowTitle
         except Exception as error:
@@ -269,6 +299,70 @@ class WindowTitleReader(Plugin):
 
         return True
 
+    def _schedule_fallback_title(self):
+        if self._enabled:
+            return
+
+        if self._pendingFallbackSourceId is not None:
+            GLib.source_remove(self._pendingFallbackSourceId)
+
+        self._pendingFallbackSourceId = GLib.timeout_add(
+            self._fallbackDelayMs,
+            self._present_pending_fallback_title,
+        )
+
+    def _present_pending_fallback_title(self):
+        self._pendingFallbackSourceId = None
+        titleText = self.get_fallback_title()
+        if titleText:
+            self._present_title(titleText)
+        return False
+
+    def get_fallback_title(self, atspiTitle=None):
+        """Returns the X11 title when AT-SPI has not exposed an equivalent title."""
+
+        if not xlibAvailable and self._display is None:
+            return ""
+
+        startedTracking = self._pollSourceId is not None
+        if not startedTracking and not self._start_tracking():
+            return ""
+
+        activeWindow = self._get_active_window()
+        titleText = self._get_current_title(activeWindow) if activeWindow else ""
+        if not titleText:
+            return ""
+
+        if atspiTitle is None:
+            atspiTitle = self._get_atspi_title()
+
+        if self._titles_match(atspiTitle, titleText):
+            return ""
+
+        return titleText
+
+    def _get_atspi_title(self):
+        if not self.app:
+            return ""
+
+        appState = self.app.getDynamicApiManager().getAPI("CthulhuState")
+        if not appState:
+            return ""
+
+        return AXObject.get_name(appState.activeWindow) or ""
+
+    def _titles_match(self, atspiTitle, fallbackTitle):
+        if not atspiTitle or not fallbackTitle:
+            return False
+
+        if self._is_wine_desktop_title(atspiTitle):
+            return False
+
+        normalizedAtspiTitle = " ".join(atspiTitle.casefold().split())
+        normalizedFallbackTitle = " ".join(fallbackTitle.casefold().split())
+        return normalizedAtspiTitle in normalizedFallbackTitle \
+            or normalizedFallbackTitle in normalizedAtspiTitle
+
     def _present_title(self, titleText):
         if not self.app:
             return

src/cthulhu/where_am_i_presenter.py

@@ -33,6 +33,7 @@ __copyright__ = "Copyright (c) 2005-2008 Sun Microsystems Inc." \
 __license__   = "LGPL"
 
 from . import cmdnames
+from . import cthulhu
 from . import debug
 from . import input_event
 from . import keybindings
@@ -319,10 +320,33 @@ class WhereAmIPresenter:
             return True
 
         title = script.speechGenerator.generateTitle(obj)
+        fallbackTitle = self._get_fallback_title(title)
+        if fallbackTitle:
+            script.presentMessage(fallbackTitle)
+            return True
+
         for (string, voice) in title:
             script.presentMessage(string, voice=voice)
         return True
 
+    @staticmethod
+    def _get_fallback_title(generatedTitle):
+        """Returns a non-AT-SPI title when the active title reader can provide one."""
+
+        try:
+            reader = cthulhu.getManager().getDynamicApiManager().getAPI("WindowTitleReader")
+        except Exception:
+            return ""
+
+        if reader is None:
+            return ""
+
+        atspiTitle = " ".join(
+            str(item[0]) for item in generatedTitle
+            if isinstance(item, (list, tuple)) and item
+        )
+        return reader.get_fallback_title(atspiTitle)
+
     def _present_default_button(self, script, event=None, dialog=None, error_messages=True):
         """Presents the default button of the current dialog."""