From 92ebb83ed8d9e7c80daf4b41fefa7b96b7c2051a Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 22 Nov 2020 13:54:26 +0530
Subject: [PATCH] Ignore errors in tts callbacks

---
 src/calibre/gui2/tts/linux.py   | 6 +++++-
 src/calibre/gui2/tts/macos.py   | 6 +++++-
 src/calibre/gui2/tts/windows.py | 9 ++++++++-
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/calibre/gui2/tts/linux.py b/src/calibre/gui2/tts/linux.py
index 3af203ed27..53101a6f58 100644
--- a/src/calibre/gui2/tts/linux.py
+++ b/src/calibre/gui2/tts/linux.py
@@ -88,7 +88,11 @@ class Client:
             self.update_status(callback_type, index_mark)
             event = self.msg_as_event(callback_type, index_mark)
             if event is not None:
-                callback(event)
+                try:
+                    callback(event)
+                except Exception:
+                    import traceback
+                    traceback.print_exc()
 
         def cw(callback_type, index_mark=None):
             self.dispatch_on_main_thread(partial(callback_wrapper, callback_type, index_mark))
diff --git a/src/calibre/gui2/tts/macos.py b/src/calibre/gui2/tts/macos.py
index c637b1269f..3f232b32c0 100644
--- a/src/calibre/gui2/tts/macos.py
+++ b/src/calibre/gui2/tts/macos.py
@@ -32,7 +32,11 @@ class Client:
         else:
             return
         if self.current_callback is not None:
-            self.current_callback(event)
+            try:
+                self.current_callback(event)
+            except Exception:
+                import traceback
+                traceback.print_exc()
 
     def speak_simple_text(self, text):
         self.current_callback = None
diff --git a/src/calibre/gui2/tts/windows.py b/src/calibre/gui2/tts/windows.py
index 2d3f54d8f7..9506931527 100644
--- a/src/calibre/gui2/tts/windows.py
+++ b/src/calibre/gui2/tts/windows.py
@@ -26,6 +26,7 @@ class Client:
         self.current_stream_number = None
         self.current_callback = None
         self.dispatch_on_main_thread = dispatch_on_main_thread
+        self.status = {'synthesizing': False, 'paused': False}
 
     def __del__(self):
         if self.sp_voice is not None:
@@ -50,12 +51,18 @@ class Client:
                 event = Event(EventType.mark, event_data)
             elif event_type == SPEI_START_INPUT_STREAM:
                 event = Event(EventType.begin)
+                self.status = {'synthesizing': True, 'paused': False}
             elif event_type == SPEI_END_INPUT_STREAM:
                 event = Event(EventType.end)
+                self.status = {'synthesizing': False, 'paused': False}
             else:
                 continue
             if c is not None and stream_number == self.current_stream_number:
-                c(event)
+                try:
+                    c(event)
+                except Exception:
+                    import traceback
+                    traceback.print_exc()
 
     def speak_simple_text(self, text):
         from calibre_extensions.winsapi import (