Allow % on width and height properties

CHANGES.rst

@@ -6,6 +6,9 @@ There's a frood who really knows where his towel is.
 1.0b4 (unreleased)
 ^^^^^^^^^^^^^^^^^^
 
+- Allow % on width and height properties (closes `#6`_).
+  [rodfersou]
+
 - Brazilian Portuguese and Spanish translations were updated.
   [rodfersou, hvelarde]
 
@@ -87,5 +90,6 @@ There's a frood who really knows where his towel is.
 - Initial release.
 
 .. _`#3`: https://github.com/simplesconsultoria/sc.embedder/issues/3
+.. _`#6`: https://github.com/simplesconsultoria/sc.embedder/issues/6
 .. _`#14`: https://github.com/simplesconsultoria/sc.embedder/issues/14
 .. _`#20`: https://github.com/simplesconsultoria/sc.embedder/issues/20

src/sc/embedder/content/embedder.py

@@ -30,6 +30,7 @@
 from zope.event import notify
 from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import Invalid
 
 import requests
 import urllib2
@@ -77,6 +78,28 @@ def EmbedderImageFieldWidget(field, request):
     return FieldWidget(field, EmbedderImageWidget(request))
 
 
+def valid_size_constraint(size):
+    """Validate if size inserted is a float number or a %.
+
+    :param size: size to be validated
+    :type size: unicode
+    :return: True if size is valid
+    :rtype: bool
+    :raises:
+        :class:`~zope.interface.Invalid` if the size is not valid
+    """
+
+    if size:
+        if ' ' in size:
+            raise Invalid(_(u'Size should not have spaces.'))
+        size = size.rstrip('%')
+        try:
+            size = float(size)
+        except ValueError:
+            raise Invalid(_(u'Size should be a float number or a percent.'))
+    return True
+
+
 class IEmbedder(form.Schema):
     """ A representation of a content embedder content type
     """
@@ -93,16 +116,18 @@ class IEmbedder(form.Schema):
         required=False,
     )
 
-    width = schema.Int(
+    width = schema.TextLine(
         title=_(u'Width'),
         description=_(u''),
         required=True,
+        constraint=valid_size_constraint,
     )
 
-    height = schema.Int(
+    height = schema.TextLine(
         title=_(u'Height'),
         description=_(u''),
         required=True,
+        constraint=valid_size_constraint,
     )
 
     embed_html = schema.Text(