Initial bring over of VUI code. (Won't work yet.)

2019-05-06 13:07:01 -07:00
parent 67f042cc57
commit d4fdde50f9
19 changed files with 2891 additions and 0 deletions
@@ -0,0 +1,50 @@
+from joy.utils.stack import expression_to_string, iter_stack
+import core, text_viewer
+
+
+MAX_WIDTH = 64
+
+
+def fsi(item):
+    '''Format Stack Item'''
+    if isinstance(item, tuple):
+        res = '[%s]' % expression_to_string(item)
+    elif isinstance(item, str):
+        res = '"%s"' % item
+    else:
+        assert not isinstance(item, unicode), repr(item)
+        res = str(item)
+    if len(res) > MAX_WIDTH:
+        return res[:MAX_WIDTH - 3] + '...'
+    return res
+
+
+class StackViewer(text_viewer.TextViewer):
+
+    def __init__(self, surface):
+        super(StackViewer, self).__init__(surface)
+        self.stack_holder = None
+        self.content_id = 'stack viewer'
+
+    def _attach(self, display):
+        if self.stack_holder:
+            return
+        om = core.OpenMessage(self, 'stack.pickle')
+        display.broadcast(om)
+        if om.status != core.SUCCESS:
+            raise RuntimeError('stack unavailable')
+        self.stack_holder = om.thing
+
+    def _update(self):
+        self.lines[:] = map(fsi, iter_stack(self.stack_holder[0])) or ['']
+
+    def focus(self, display):
+        self._attach(display)
+        super(StackViewer, self).focus(display)
+
+    def handle(self, message):
+        if (isinstance(message, core.ModifyMessage)
+            and message.subject is self.stack_holder
+            ):
+            self._update()
+            self.draw_body()