[FIX] web: restore FieldStatus behavior

FieldStatus was broken:
- With a selection, the statusbar_visible attribute forces the choices
  to display, the discarded ones do not appear at all (even folded)
- With a m2o, the fold_field option tells the field to check in the
  relation to know if the choice has to be folded or not, this was not
  properly supported
- Changing a m2o value was broken as the parseMany2one function did
  not exist
- The status were misordered
- ...

* Also refactor the way the rendering is handled.
* Also modify all statusbar tests so that the statusbar widget is
  placed in the form header tag (as it is the common use case).

4 files changed, 82 insertions, 49 deletions

diff --git a/addons/web/static/src/js/fields/field_utils.js b/addons/web/static/src/js/fields/field_utils.js
index c359a014b4e..406a86ac7a2 100644
--- a/addons/web/static/src/js/fields/field_utils.js
+++ b/addons/web/static/src/js/fields/field_utils.js
@@ -336,6 +336,34 @@ function parseMonetary(formatted_value) {
     return parseFloat(value);
 }
 
+/**
+ * Creates an object with id and display_name.
+ *
+ * @param {Array|number|string|Object} value
+ *        The given value can be :
+ *        - an array with id as first element and display_name as second element
+ *        - a number or a string representing the id (the display_name will be
+ *          returned as undefined)
+ *        - an object, simply returned untouched
+ * @returns {Object} (contains the id and display_name)
+ *                   Note: if the given value is not an array, a string or a
+ *                   number, the value is returned untouched.
+ */
+function parseMany2one(value) {
+    if (_.isArray(value)) {
+        return {
+            id: value[0],
+            display_name: value[1],
+        };
+    }
+    if (_.isNumber(value) || _.isString(value)) {
+        return {
+            id: parseInt(value, 10),
+        };
+    }
+    return value;
+}
+
 return {
     format: {
         binary: _.identity, // todo
@@ -368,7 +396,7 @@ return {
         id: _.identity,
         integer: parseInteger,
         many2many: _.identity, // todo
-        many2one: _.identity,
+        many2one: parseMany2one,
         monetary: parseMonetary,
         one2many: _.identity,
         reference: _.identity, // todo
diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index 68bd7a52343..4663c40f755 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -1166,13 +1166,15 @@ var FieldMany2ManyCheckBoxes = AbstractField.extend({
 //------------------------------------------------------------------------------
 
 var FieldStatus = AbstractField.extend({
-    template: "FieldStatus",
     className: 'o_statusbar_status',
     events: {
-        'click .o_arrow_button': '_onClickStage',
+        'click button:not(.dropdown-toggle)': '_onClickStage',
     },
     specialData: "_fetchSpecialStatus",
     supportedFieldTypes: ['selection', 'many2one'],
+    /**
+     * @override init from AbstractField
+     */
     init: function () {
         this._super.apply(this, arguments);
         this._setState();
@@ -1183,6 +1185,7 @@ var FieldStatus = AbstractField.extend({
     //--------------------------------------------------------------------------
 
     /**
+     * @override _reset from AbstractField
      * @private
      */
     _reset: function () {
@@ -1190,45 +1193,51 @@ var FieldStatus = AbstractField.extend({
         this._setState();
     },
     /**
+     * Prepares the rendering data from the field and record data.
      * @private
      */
     _setState: function () {
+        var self = this;
         if (this.field.type === 'many2one') {
-            this.status_information = this.record.specialData[this.name];
-            var status = _.findWhere(this.status_information, {id: this.value.res_id});
-            if (status) {
-                status.selected = true;
-            }
+            this.status_information = _.map(this.record.specialData[this.name], function (info) {
+                return _.extend({
+                    selected: info.id === self.value.res_id,
+                }, info);
+            });
         } else {
-            var self = this;
-            this.status_information = _.map(this.field.selection, function (val) {
-                return { id: val[0], display_name: val[1], selected: val[0] === self.value };
+            var selection = this.field.selection;
+            if (this.attrs.statusbar_visible) {
+                var restriction = this.attrs.statusbar_visible.split(",");
+                selection = _.filter(selection, function (val) {
+                    return _.contains(restriction, val[0]) || val[0] === self.value;
+                });
+            }
+            this.status_information = _.map(selection, function (val) {
+                return { id: val[0], display_name: val[1], selected: val[0] === self.value, fold: false };
             });
         }
     },
     /**
+     * @override _render from AbstractField
      * @private
      */
     _render: function () {
-        var visible = this.attrs.statusbar_visible;
-        var selection_folded = [];
-        var selection_unfolded = [];
-        _.each(this.status_information, function (info) {
-            if (info.selected && (info.fold || visible && visible.indexOf(info.display_name) === -1)) {
-                selection_folded.push(info);
-            } else {
-                selection_unfolded.push(info);
-            }
-        });
-        var mobile = config.device.size_class <= config.device.SIZES.XS;
-        // grep: FieldStatus.content.mobile, FieldStatus.content.desktop
-        var content = qweb.render("FieldStatus.content." + (mobile ? 'mobile' : 'desktop'), {
-            selection_folded: selection_folded.reverse(),
-            selection_unfolded: selection_unfolded.reverse(),
-            clickable: !!this.attrs.clickable,
-        });
-        this.$el.html(content);
-        this.$('.disabled').prop('disabled', true);
+        if (config.device.size_class > config.device.SIZES.XS) {
+            var selections = _.partition(this.status_information, function (info) {
+                return (info.selected || !info.fold);
+            });
+            this.$el.html(qweb.render("FieldStatus.content.desktop", {
+                selection_unfolded: selections[0],
+                selection_folded: selections[1],
+                clickable: !!this.attrs.clickable,
+            }));
+        } else {
+            this.$el.html(qweb.render("FieldStatus.content.mobile", {
+                selection: this.status_information,
+                value: _.findWhere(this.status_information, {selected: true}).display_name,
+                clickable: !!this.attrs.clickable,
+            }));
+        }
     },
 
     //--------------------------------------------------------------------------
@@ -1236,22 +1245,14 @@ var FieldStatus = AbstractField.extend({
     //--------------------------------------------------------------------------
 
     /**
-     * Note that this function is debounced...
+     * Called when on status stage is clicked -> sets the field value.
+     * Note: this function is debounced...
      *
      * @private
-     * @param {MouseEvent} event
+     * @param {MouseEvent} e
      */
-    _onClickStage: _.debounce(function (event) {
-        var $stage = $(event.currentTarget);
-        var val;
-        if (this.field.type === "many2one") {
-            val = parseInt($stage.data("value"), 10);
-        } else {
-            val = $stage.data("value");
-        }
-        if (val) {
-            this._setValue(val);
-        }
+    _onClickStage: _.debounce(function (e) {
+        this._setValue($(e.currentTarget).data("value"));
     }, 300, true),
 });
 
diff --git a/addons/web/static/src/js/views/basic/basic_model.js b/addons/web/static/src/js/views/basic/basic_model.js
index cdb8bb61f7c..afac5c1c5ff 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -964,7 +964,7 @@ var BasicModel = AbstractModel.extend({
         }
         var rel_data = _.pick(data, 'id', 'display_name');
         var def;
-        if (!('display_name' in rel_data)) {
+        if (rel_data.display_name === undefined) {
             var field = record.fields[fieldName];
             def = this._rpc(field.relation, 'name_get')
                 .args([data.id])
@@ -1498,7 +1498,12 @@ var BasicModel = AbstractModel.extend({
     _fetchSpecialStatus: function (record, fieldName) {
         var foldField = record.fieldAttrs[fieldName].options.fold_field;
         var fieldsToRead = foldField ? [foldField] : [];
-        return this._fetchSpecialMany2ones(record, fieldName, fieldsToRead);
+        return this._fetchSpecialMany2ones(record, fieldName, fieldsToRead).then(function (m2os) {
+            _.each(m2os, function (m2o) {
+                m2o.fold = foldField ? m2o[foldField] : false;
+            });
+            return m2os;
+        });
     },
     /**
      * Fetch all data in a ungrouped list
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 a83c7d653b5..ce7c3b0bc16 100644
--- a/addons/web/static/src/js/views/form/form_renderer.js
+++ b/addons/web/static/src/js/views/form/form_renderer.js
@@ -477,14 +477,13 @@ return BasicRenderer.extend({
     },
     _renderTagHeader: function (node) {
         var self = this;
-        var $statusbar = $('<div>').addClass('o_form_statusbar');
-        var $buttons = $('<div>').addClass('o_statusbar_buttons');
+        var $statusbar = $('<div>', {class: 'o_form_statusbar'});
+        var $buttons = $('<div>', {class: 'o_statusbar_buttons'});
         $statusbar.append($buttons);
         _.each(node.children, function (child) {
             if (child.tag === 'button') {
                 $buttons.append(self._renderHeaderButton(child));
-            }
-            if (child.tag === 'field') {
+            } else if (child.tag === 'field') {
                 var widget = self._renderFieldWidget(child);
                 $statusbar.append(widget.$el);
             }