Add support for "simple confirm" of object deletion

i.e. can just use `window.confirm()` instead of showing full confirm page

note, this is jquery-only for now

tailbone/templates/master/edit.mako

@@ -1,5 +1,5 @@
 ## -*- coding: utf-8; -*-
-<%inherit file="/form.mako" />
+<%inherit file="/master/form.mako" />
 
 <%def name="title()">Edit: ${instance_title}</%def>
 
@@ -24,9 +24,7 @@
   % if master.viewable and request.has_perm('{}.view'.format(permission_prefix)):
       <li>${h.link_to("View this {}".format(model_title), action_url('view', instance))}</li>
   % endif
-  % if master.deletable and instance_deletable and request.has_perm('{}.delete'.format(permission_prefix)):
+  ${self.context_menu_item_delete()}
-      <li>${h.link_to("Delete this {}".format(model_title), action_url('delete', instance))}</li>
-  % endif
   % if master.creatable and master.show_create_link and request.has_perm('{}.create'.format(permission_prefix)):
       % if master.creates_multiple:
           <li>${h.link_to("Create new {}".format(model_title_plural), url('{}.create'.format(route_prefix)))}</li>

tailbone/templates/master/form.mako

@@ -0,0 +1,22 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/form.mako" />
+
+<%def name="context_menu_item_delete()">
+  % if master.deletable and instance_deletable and request.has_perm('{}.delete'.format(permission_prefix)):
+      % if master.delete_confirm == 'simple':
+          <li>
+            ${h.form(action_url('delete', instance))}
+            ${h.csrf_token(request)}
+            <a href="#" class="delete-instance">
+              Delete this ${model_title}
+            </a>
+            ${h.end_form()}
+          </li>
+      % else:
+          ## assuming here that: delete_confirm == 'full'
+          <li>${h.link_to("Delete this {}".format(model_title), action_url('delete', instance))}</li>
+      % endif
+  % endif
+</%def>
+
+${parent.body()}

tailbone/templates/master/view.mako

@@ -1,10 +1,28 @@
 ## -*- coding: utf-8; -*-
-<%inherit file="/form.mako" />
+<%inherit file="/master/form.mako" />
 
 <%def name="title()">${index_title} &raquo; ${instance_title}</%def>
 
 <%def name="extra_javascript()">
   ${parent.extra_javascript()}
+  % if master.deletable and instance_deletable and request.has_perm('{}.delete'.format(permission_prefix)) and master.delete_confirm == 'simple':
+      % if not use_buefy:
+          <script type="text/javascript">
+
+            $(function () {
+
+                $('#context-menu a.delete-instance').on('click', function() {
+                    if (confirm("Are you sure you wish to delete this ${model_title}?")) {
+                        $(this).parents('form').submit();
+                    }
+                    return false;
+                });
+
+            });
+
+          </script>
+      % endif
+  % endif
   % if master.has_rows:
       % if use_buefy:
           ${h.javascript_link(request.static_url('tailbone:static/js/tailbone.buefy.grid.js') + '?ver={}'.format(tailbone.__version__))}
@@ -41,9 +59,7 @@
   % if master.editable and instance_editable and request.has_perm('{}.edit'.format(permission_prefix)):
       <li>${h.link_to("Edit this {}".format(model_title), action_url('edit', instance))}</li>
   % endif
-  % if master.deletable and instance_deletable and request.has_perm('{}.delete'.format(permission_prefix)):
+  ${self.context_menu_item_delete()}
-      <li>${h.link_to("Delete this {}".format(model_title), action_url('delete', instance), class_='delete-instance')}</li>
-  % endif
   % if master.creatable and master.show_create_link and request.has_perm('{}.create'.format(permission_prefix)):
       % if master.creates_multiple:
           <li>${h.link_to("Create new {}".format(model_title_plural), url('{}.create'.format(route_prefix)))}</li>

tailbone/views/master.py

@@ -83,6 +83,7 @@ class MasterView(View):
     viewable = True
     editable = True
     deletable = True
+    delete_confirm = 'full'
     bulk_deletable = False
     set_deletable = False
     supports_set_enabled_toggle = False