[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, 39 insertions, 0 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_renderer.js b/addons/web/static/src/js/views/basic/basic_renderer.js
index 0e26e2fa19f..ee6e685c3d4 100644
--- a/addons/web/static/src/js/views/basic/basic_renderer.js
+++ b/addons/web/static/src/js/views/basic/basic_renderer.js
@@ -11,6 +11,7 @@ var AbstractRenderer = require('web.AbstractRenderer');
 var config = require('web.config');
 var core = require('web.core');
 var dom = require('web.dom');
+var widgetRegistry = require('web.widget_registry');
 
 var qweb = core.qweb;
 
@@ -332,6 +333,19 @@ var BasicRenderer = AbstractRenderer.extend({
         return _.findWhere(this.allModifiersData, {node: node});
     },
     /**
+     * @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);
+        }
+    },
+    /**
      * Used by list and kanban renderers to determine whether or not to display
      * the no content helper (if there is no data in the state to display)
      *
@@ -541,6 +555,31 @@ var BasicRenderer = AbstractRenderer.extend({
         return $.when();
     },
     /**
+     * Instantiate custom widgets
+     *
+     * @private
+     * @param {Object} record
+     * @param {Object} node
+     * @returns {jQueryElement}
+     */
+    _renderWidget: function (record, node) {
+        var Widget = widgetRegistry.get(node.attrs.name);
+        var widget = new Widget(this, record);
+
+        // Prepare widget rendering and save the related deferred
+        var def = widget.__widgetRenderAndInsert(function () {});
+        if (def.state() === 'pending') {
+            this.defs.push(def);
+        }
+
+        // handle other attributes/modifiers
+        this._handleAttributes(widget.$el, node);
+        this._registerModifiers(node, record, widget);
+        widget.$el.addClass('o_widget');
+        return widget.$el;
+    },
+
+    /**
      * Rerenders a given widget and make sure the associated data which
      * referenced the old one is updated.
      *