[FIX] web: reimplement custom widgets in basic views

With the new views, we lost a (almost unused and undocumented) feature:
the ability to instantiate custom widgets in a form view, not linked to
a particular field.  For example:

<widget type="weekly_timesheet" attrs="{'readonly': [['state', 'not in', ['new', 'draft']]]}"/>

We reintroduce this feature in this commit, with a nice twist: it also
works for the list view and the kanban view.

1 files changed, 10 insertions, 13 deletions

diff --git a/addons/web/static/src/js/views/form/form_renderer.js b/addons/web/static/src/js/views/form/form_renderer.js
index 3cb22af5dfd..7d962e223ce 100644
--- a/addons/web/static/src/js/views/form/form_renderer.js
+++ b/addons/web/static/src/js/views/form/form_renderer.js
@@ -227,19 +227,6 @@ var FormRenderer = BasicRenderer.extend({
     },
     /**
      * @private
-     * @param {jQueryElement} $el
-     * @param {Object} node
-     */
-    _handleAttributes: function ($el, node) {
-        if (node.attrs.class) {
-            $el.addClass(node.attrs.class);
-        }
-        if (node.attrs.style) {
-            $el.attr('style', node.attrs.style);
-        }
-    },
-    /**
-     * @private
      * @param {Object} node
      * @returns {jQueryElement}
      */
@@ -759,6 +746,16 @@ var FormRenderer = BasicRenderer.extend({
         return $sheet;
     },
     /**
+     * Instantiate custom widgets
+     *
+     * @private
+     * @param {Object} node
+     * @returns {jQueryElement}
+     */
+    _renderTagWidget: function (node) {
+        return this._renderWidget(this.state, node);
+    },
+    /**
      * Main entry point for the rendering.  From here, we call _renderNode on
      * the root of the arch, then, when every deferred (from the field widgets)
      * are done, it will resolves itself.