[FIX] web: autofocus

Support autofocus on notebook pages:
```
<page autofocus="autofocus">
```

This was supported before the web client refactoring.

opw-801259

addons/web/static/src/js/views/form/form_renderer.js

@@ -693,6 +693,7 @@ var FormRenderer = BasicRenderer.extend({
         var self = this;
         var $headers = $('<ul class="nav nav-tabs">');
         var $pages = $('<div class="tab-content nav nav-tabs">');
+        var autofocusTab = -1;
         // renderedTabs is used to aggregate the generated $headers and $pages
         // alongside their node, so that their modifiers can be registered once
         // all tabs have been rendered, to ensure that the first visible tab
@@ -701,9 +702,8 @@ var FormRenderer = BasicRenderer.extend({
             var pageID = _.uniqueId('notebook_page_');
             var $header = self._renderTabHeader(child, pageID);
             var $page = self._renderTabPage(child, pageID);
-            if (index === 0) {
-                $header.addClass('active');
-                $page.addClass('active');
+            if (autofocusTab === -1 && child.attrs.autofocus === 'autofocus') {
+                autofocusTab = index;
             }
             self._handleAttributes($header, child);
             $headers.append($header);
@@ -714,6 +714,11 @@ var FormRenderer = BasicRenderer.extend({
                 node: child,
             };
         });
+        if (renderedTabs.length) {
+            var tabToFocus = renderedTabs[Math.max(0, autofocusTab)];
+            tabToFocus.$header.addClass('active');
+            tabToFocus.$page.addClass('active');
+        }
         // register the modifiers for each tab
         _.each(renderedTabs, function (tab) {
             self._registerModifiers(tab.node, self.state, tab.$header, {

addons/web/static/tests/views/form_tests.js

@@ -483,6 +483,37 @@ QUnit.module('Views', {
         form.destroy();
     });
 
+    QUnit.test('autofocus on second notebook page', function (assert) {
+        assert.expect(2);
+
+        var form = createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch: '<form string="Partners">' +
+                    '<sheet>' +
+                        '<field name="product_id"/>' +
+                        '<notebook>' +
+                            '<page string="Choucroute">' +
+                                '<field name="foo"/>' +
+                            '</page>' +
+                            '<page string="Cassoulet" autofocus="autofocus">' +
+                                '<field name="bar"/>' +
+                            '</page>' +
+                        '</notebook>' +
+                    '</sheet>' +
+                '</form>',
+            res_id: 1,
+        });
+
+        assert.notOk(form.$('.o_notebook .nav li:first()').hasClass('active'),
+            'first tab should not active');
+        assert.ok(form.$('.o_notebook .nav li:nth(1)').hasClass('active'),
+            'second tab should be active');
+
+        form.destroy();
+    });
+
     QUnit.test('invisible attrs on group are re-evaluated on field change', function (assert) {
         assert.expect(2);