Some echo tests added.

tests/gtk_messaging.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+"""Private transcript provider matching legacy Pidgin's accessible hierarchy."""
+import ctypes
+import os
+import sys
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+gi.require_version("Atk", "1.0")
+gi.require_version("GdkX11", "3.0")
+from gi.repository import Atk, GdkX11, GLib, Gtk
+
+if ctypes.CDLL(None).prctl(15, sys.argv[1].encode(), 0, 0, 0) != 0:
+    raise RuntimeError("Cannot set fixture process identity")
+
+chatWindow = Gtk.Window(title="Conversation fixture")
+notebook = Gtk.Notebook()
+transcript = Gtk.TextView(editable=False)
+scroll = Gtk.ScrolledWindow()
+scroll.add(transcript)
+notebook.append_page(scroll, Gtk.Label(label="Conversation"))
+chatWindow.add(notebook)
+chatWindow.show_all()
+buffer = transcript.get_buffer()
+typingTag = buffer.create_tag("typing", scale=0.8)
+weightTag = buffer.create_tag("typing-weight", weight=300)
+
+foreground = Gtk.Window(title="Foreground fixture")
+box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
+editor = Gtk.Entry()
+marker = Gtk.Label(label="Marker")
+marker.get_accessible().set_role(Atk.Role.ALERT)
+box.add(editor)
+box.add(marker)
+foreground.add(box)
+foreground.show_all()
+pendingInput = ""
+
+
+def receive_command(source, condition):
+    global pendingInput
+    content = os.read(sys.stdin.fileno(), 4096)
+    if not content:
+        Gtk.main_quit()
+        return False
+    pendingInput += content.decode()
+    while "\n" in pendingInput:
+        command, pendingInput = pendingInput.split("\n", 1)
+        if command == "message":
+            buffer.insert(buffer.get_end_iter(), "Username: Hello\n")
+        elif command == "typing":
+            buffer.insert_with_tags(buffer.get_end_iter(), "Username is typing\n", typingTag)
+        elif command == "typing-weight":
+            buffer.insert_with_tags(buffer.get_end_iter(), "Username is typing\n", weightTag)
+        elif command == "edit":
+            editor.set_text("Typed input")
+        elif command == "barrier":
+            marker.set_text("Messaging barrier")
+        elif command == "destroy":
+            transcript.destroy()
+        elif command == "quit":
+            Gtk.main_quit()
+            return False
+    return True
+
+
+GLib.io_add_watch(sys.stdin, GLib.IO_IN | GLib.IO_HUP, receive_command)
+GLib.idle_add(lambda: print("ready", GdkX11.X11Window.get_xid(foreground.get_window()), flush=True) or False)
+Gtk.main()