Get console print working from within the iframe as well

src/pyj/read_book/iframe.pyj

@@ -118,6 +118,7 @@ class IframeBoss:
             print('Unknown action in message to iframe from parent: ' + data.action)
 
     def initialize(self, data):
+        nonlocal print
         self.gcm_from_parent, self.gcm_to_parent = GCM(data.secret.subarray(0, 32)), GCM(data.secret.subarray(32))
         scroll_viewport.update_window_size(data.width, data.height)
         if data.translations:
@@ -128,9 +129,13 @@ class IframeBoss:
         window.addEventListener('wheel', self.onwheel)
         window.addEventListener('keydown', self.onkeydown)
         document.documentElement.addEventListener('contextmenu', self.oncontextmenu)
-        create_touch_handlers()
         self.color_scheme = data.color_scheme
         self.encrypted_communications = True
+        print = self.print_to_parent
+        create_touch_handlers()
+
+    def print_to_parent(self, *args):
+        self.send_message('print', string=' '.join(map(str, args)))
 
     def onerror(self, msg, script_url, line_number, column_number, error_object):
         if error_object:

src/pyj/read_book/view.pyj

@@ -119,6 +119,7 @@ class View:
             'bump_font_size': self.bump_font_size,
             'find_in_spine': self.on_find_in_spine,
             'request_size': self.on_request_size,
+            'print': self.on_print,
         }
         self.currently_showing = {}
 
@@ -158,6 +159,9 @@ class View:
         w, h = self.iframe_size()
         self.send_message('window_size', width=w, height=h)
 
+    def on_print(self, data):
+        print(data.string)
+
     def find(self, text, backwards):
         self.send_message('find', text=text, backwards=backwards, searched_in_spine=False)