Added detection of failed markup rendering, and plaintext fallback

sbapp/ui/helpers.py

@@ -45,10 +45,6 @@ def strip_emojis(str_input):
     return output
 
 def multilingual_markup(data):
-    # TODO: Remove
-    # import time
-    # ts = time.time()
-
     do = ""
     rfont = "default"
     ds = data.decode("utf-8")
@@ -95,6 +91,10 @@ def multilingual_markup(data):
 
     return do.encode("utf-8")
 
+font_map = {
+    "mono": "RobotoMono-Regular"
+}
+
 codepoint_map = {
     0x0590: [0x05ff, "hebrew"],
     0x2e3a: [0x2e3b, "chinese"],

sbapp/ui/messages.py

@@ -653,6 +653,14 @@ class Messages():
                 item.ids.content_text.owner = item
                 item.ids.content_text.bind(texture_size=check_textures)
 
+                def cbf(w):
+                    def x(dt):
+                        if w.texture_size[0] == 0 and w.texture_size[1] == 0:
+                            w.text = "[i]This message could not be rendered, likely due to an error in its markup. Falling back to plain-text rendering.[/i]\n\n"+escape_markup(w.text)
+                    return x
+
+                Clock.schedule_once(cbf(item.ids.content_text), 0.25)
+
                 if not RNS.vendor.platformutils.is_android():
                     item.radius = dp(5)