teaser maxlength

content/admin.py

@@ -39,6 +39,20 @@ class ServerAdmin(admin.ModelAdmin):
     pass
 '''
 
+class MaxLengthAdminMarkdownxWidget(AdminMarkdownxWidget):
+    def get_context(self, name, value, attrs=None):
+        if name == 'teaser':
+            if not attrs:
+                attrs = {}
+            attrs['maxlength'] = 250
+            print(dir(self))
+        return super(MaxLengthAdminMarkdownxWidget, self).get_context(name, value, attrs)
+
+    class Media:
+        js = (
+            'js/maxlength_count.js',
+        )
+
 class GalleryAdminForm(forms.ModelForm):
     """Users never need to enter a description on a gallery."""
 
@@ -58,7 +72,7 @@ class ContentAdmin(admin.ModelAdmin):
     raw_id_fields = ['photo']
     inlines = [ContentParentsInline, FileInline, LinkInline]
     formfield_overrides = {
-        models.TextField: {'widget': AdminMarkdownxWidget},
+        models.TextField: {'widget': MaxLengthAdminMarkdownxWidget},
     }
 
 

content/static/js/maxlength_count.js

@@ -0,0 +1,18 @@
+django.jQuery(function() {
+    django.jQuery('textarea[maxlength]').each(function(i, textarea) {
+        var t = django.jQuery(textarea),
+            count = t.parent().find('.maxlength-count')
+        if (count.length == 0) {
+            count = django.jQuery('<div>', {'class': 'maxlength-count'} ).insertAfter(t)
+            t.on({
+                keydown: update,
+                change: update,
+                drop: update,
+            })
+        }
+        function update() {
+            var max = Math.round(t.attr('maxlength')), left = max - t.val().length
+            count.html(left + ' characters left. (max: ' + max + ')') 
+        }
+    });
+});