Let attribute name, width, and height be controlled by schema

themis/fields/interfaces.py

@@ -163,5 +163,24 @@ class IPreviewDoc(IField):
         description=IField['missing_value'].description,
         required=False)
 
+    required = schema.Bool(
+        title=IField['required'].title,
+        description=IField['required'].description,
+        default=False)
+
+    attribute_name = schema.TextLine(
+        title=u'Attribute Name',
+        description=u'Attribute Name',
+        required=True,
+        default=u'fichier')
+
+    width = schema.TextLine(
+        title=u'Width',
+        required=False)
+
+    height = schema.TextLine(
+        title=u'Height',
+        required=False)
+
 class IPreviewDocWidget(IWidget):
     pass

themis/fields/previewdoc_display.pt

@@ -2,7 +2,9 @@
       xmlns:tal="http://xml.zope.org/namespaces/tal"
       tal:omit-tag="">
     <object tal:condition="view/href"
-            tal:attributes="href view/href"
+            tal:attributes="href view/href;
+                            width view/width;
+                            height view/height"
             type="application/pdf" width="200px" height="100px">
        <p>Pas de lecteur PDF intégré, vous pouvez ouvrir le fichier
           en suivant ce lien : <a tal:attributes="href view/href"

themis/fields/widgets.py

@@ -350,19 +350,35 @@ def PreviewDocFieldWidget(field, request):
 class PreviewDocWidget(Widget):
     implements(IPreviewDocWidget)
 
+    def width(self):
+        if hasattr(self.field, 'width'):
+            return self.field.width
+        return u'200px'
+
+    def height(self):
+        if hasattr(self.field, 'height'):
+            return self.field.height
+        return u'100px'
+
+    def get_attribute_name(self):
+        if hasattr(self.field, 'attribute_name'):
+            return self.field.attribute_name
+        else:
+            return 'fichier'
+
     def href(self):
-        if not hasattr(self.context, 'fichier'):
+        if not hasattr(self.context, self.get_attribute_name()):
             return None
-        if self.context.fichier:
-            return self.form.widgets['fichier'].download_url
+        if getattr(self.context, self.get_attribute_name()):
+            return self.form.widgets[self.get_attribute_name()].download_url
         return None
 
     def filename(self):
-        if not hasattr(self.context, 'fichier'):
+        if not hasattr(self.context, self.get_attribute_name()):
             return ''
-        if self.context.fichier:
-            if self.form.widgets['fichier'].filename_encoded:
-                return self.form.widgets['fichier'].filename_encoded
+        if getattr(self.context, self.get_attribute_name()):
+            if self.form.widgets[self.get_attribute_name()].filename_encoded:
+                return self.form.widgets[self.get_attribute_name()].filename_encoded
             return 'unknown.pdf'
         return ''