Backport workflow context and field support

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/document_states/literals.py

@@ -2,6 +2,27 @@ from __future__ import unicode_literals
 
 from django.utils.translation import ugettext_lazy as _
 
+FIELD_TYPE_CHOICE_CHAR = 1
+FIELD_TYPE_CHOICE_INTEGER = 2
+FIELD_TYPE_CHOICES = (
+    (FIELD_TYPE_CHOICE_CHAR, _('Character')),
+    (FIELD_TYPE_CHOICE_INTEGER, _('Number (Integer)')),
+)
+
+FIELD_TYPE_MAPPING = {
+    FIELD_TYPE_CHOICE_CHAR: 'django.forms.CharField',
+    FIELD_TYPE_CHOICE_INTEGER: 'django.forms.IntegerField',
+}
+
+WIDGET_CLASS_TEXTAREA = 1
+WIDGET_CLASS_CHOICES = (
+    (WIDGET_CLASS_TEXTAREA, _('Text area')),
+)
+
+WIDGET_CLASS_MAPPING = {
+    WIDGET_CLASS_TEXTAREA: 'django.forms.widgets.Textarea',
+}
+
 WORKFLOW_ACTION_ON_ENTRY = 1
 WORKFLOW_ACTION_ON_EXIT = 2