tts: Modal screens stop tts processing.

The idea being to not read out things that are blocked by a modal
dialogue.

Fixes #3030.

renpy/display/core.py

@@ -707,13 +707,18 @@ def _tts_common(self, default_alt=None, reverse=False):
         else:
             order = -1
 
+        speech = ""
+
         for i in self.visit()[::order]:
             if i is not None:
                 speech = i._tts()
 
                 if speech.strip():
                     rv.append(speech)
 
+                    if isinstance(speech, renpy.display.tts.TTSDone):
+                        break
+
         rv = ": ".join(rv)
         rv = rv.replace("::", ":")
         rv = rv.replace(": :", ":")
@@ -726,6 +731,8 @@ def _tts_common(self, default_alt=None, reverse=False):
         if alt is not None:
             rv = renpy.substitutions.substitute(alt, scope={ "text" : rv })[0]
 
+        rv = type(speech)(rv)
+
         return rv
 
     def _tts(self):

renpy/display/screen.py

@@ -736,6 +736,15 @@ def event(self, ev, x, y, st):
     def get_phase_name(self):
         return phase_name[self.phase]
 
+    def _tts(self):
+        if (self.phase == OLD) or (self.phase == HIDE):
+            return ""
+
+        if self.modal:
+            return renpy.display.tts.TTSDone(self._tts_common())
+        else:
+            return self._tts_common()
+
 
 # The name of the screen that is currently being displayed, or
 # None if no screen is being currently displayed.