From 816de0918c28461cc2d1e3457348fd5b6e11950f Mon Sep 17 00:00:00 2001
From: Lionel LASKE <llaske@c2s.fr>
Date: Tue, 18 Sep 2012 19:16:20 +0000
Subject: Initial version

---
(limited to 'enyo.py')

diff --git a/enyo.py b/enyo.py
new file mode 100644
index 0000000..f1a342b
--- /dev/null
+++ b/enyo.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Sugar interface for Enyo JavaScript framework
+
+import logging
+import json
+import inspect
+
+
+class Enyo:
+    """Class to handle communication with Enyo"""
+
+    def __init__(self, webview):
+        """Constructor: link to the WebKit widget"""
+        self.webview = webview
+        self.handlers = {}
+        self.webview.connect("console-message", self._message_emitted)
+
+    def connect(self, name, callback):
+        """Add a new handler for an event"""
+        self.handlers[name] = callback
+
+    def send_message(self, name, args=None):
+        """Send a message to Enyo"""
+        script = "enyo.Sugar.sendMessage('"+name+"', "
+        if not args is None:
+            value = "'"+self.json_encode(args)+"'"
+        else:
+            value = "null"
+        script = script+value+")"
+        logging.warning("sugar://"+name+"/"+value)
+        return self.webview.execute_script(script)
+
+    def _message_emitted(self, widget, value, line, source):
+        """Raised when a message from Enyo has been received"""
+        # Only consider prefixed message
+        prefix = "enyo://"
+        if not value.startswith(prefix):
+            return False
+
+        # Get name
+        prefixlen = len(prefix)
+        size = value[prefixlen:prefixlen+value[prefixlen:].index("/")]
+        start = prefixlen+1+len(size)
+        name = value[start:start+int(size)]
+
+        # Get param
+        start = start + len(name)+1
+        size = value[start:start+value[start:].index("/")]
+        if int(size) == 0:
+            args = None
+        else:
+            start = start+1+len(size)
+            args = value[start:start+int(size)]
+
+        # Call handler if exist
+        logging.warning(value);
+        if name in self.handlers:
+            callback = self.handlers[name]
+            if args:
+                callback(json.loads(args))
+            else:
+                callback(None)
+
+        return True
+
+    def json_encode(self, obj):
+        """Encode object as a JSON string"""
+        try:
+            result = json.dumps(obj)
+        except TypeError:
+            result = "{"
+            first = True
+            for name in dir(obj):
+                value = getattr(obj, name)
+                if not name.startswith('__') and not inspect.ismethod(value) and not inspect.isroutine(value) and not inspect.isbuiltin(value) and not isinstance(value, obj.__class__):
+                    if not first:
+                        result = result + ', '
+                    else:
+                        first = False
+                    result = result + '"'+name+'": '
+                    result = result + self.json_encode(value)
+            result = result + "}"
+        return result
--
cgit v0.9.1