Use an idle callback, batch background work

src/main.py

@@ -20,9 +20,9 @@ from .package_info import Worker
 class Application(Gtk.Application):
 
     def __init__(self):
-        super().__init__(application_id='sm.puri.Get_Package_Info')
-        GLib.set_application_name('Get Package Info')
-        GLib.set_prgname('sm.puri.Get_Package_Info')
+        super().__init__(application_id='librem5_package_info_tool')
+        GLib.set_application_name('Librem 5 Package Information')
+        GLib.set_prgname('librem5_package_info_tool')
 
         self.timeout_id = None
         self.lines = []
@@ -31,15 +31,15 @@ class Application(Gtk.Application):
 
     def do_activate(self):
         window = Gtk.ApplicationWindow(application=self)
-        window.set_icon_name('sm.puri.Get_Package_Info')
+        window.set_icon_name('librem5_package_info_tool')
 
-        header = Gtk.HeaderBar(title=_('Get Package Info'),
+        header = Gtk.HeaderBar(title=_('Librem 5 Package Information'),
                                show_close_button=True)
         window.set_titlebar(header)
 
         self.layout = Gtk.Box(orientation='vertical', margin=8, spacing=12)
 
-        if os.path.exists(self.output_dir):
+        if os.path.exists(os.path.join(self.output_dir, 'index.html')):
 
             question_label = Gtk.Label()
             question_label.set_markup(_('<b>Existing information is available.</b>'))
@@ -106,7 +106,7 @@ class Application(Gtk.Application):
 
         self.state = 'sources'
         self.iter = self.worker.read_sources()
-        self.timeout_id = GLib.timeout_add(1, self.timeout, None)
+        self.timeout_id = GLib.idle_add(self.timeout, None)
 
     def timeout(self, user_data):
 
@@ -118,17 +118,18 @@ class Application(Gtk.Application):
     def read_source(self):
 
         try:
-            info = self.iter.__next__()
+            for i in range(250):
+                info = self.iter.__next__()
+                suite_name, i, total = info
+                if self.lines[-1] != suite_name:
+                    self.lines.append(suite_name)
 
-            suite_name, i, total = info
-            self.progress.set_text('%i/%i' % (i, total))
             self.progress.set_fraction(i/total)
-            if self.lines[-1] != suite_name:
-                self.lines.append(suite_name)
             self.update_label()
 
         except StopIteration:
-            # Start a new timer and stop the current one.
+
+            self.progress.set_fraction(1.0)
             self.state = 'listing'
             self.lines.append(_('Listing packages'))
             self.lines.append('')
@@ -140,8 +141,10 @@ class Application(Gtk.Application):
     def list_package(self):
 
         try:
-            name = self.iter.__next__()
-            self.lines[-1] = name
+            for i in range(100):
+                name = self.iter.__next__()
+                self.lines[-1] = name
+
             self.update_label()
 
         except StopIteration: