[FIX] web: list_editable_renderer: don't instantiate widgets twice

In an editable list view, if there was a readonly field in the table,
positionned before editable fields, clicking on that readonly field
resulted in the editable field widgets being re-instantiated and
appended to the DOM (so there were several widgets per fields/cells).

addons/web/static/src/js/views/list/list_editable_renderer.js

@@ -366,7 +366,7 @@ ListRenderer.include({
 
         // if we are just changing active cell in the same row, activate the
         // corresponding widget and return
-        if (rowIndex === this.currentRow && colIndex !== this.currentCol) {
+        if (rowIndex === this.currentRow) {
             var w = _.findWhere(this.widgets, {
                 __rowIndex: rowIndex,
                 __colIndex: colIndex

addons/web/static/test/views/list_tests.js

@@ -970,6 +970,44 @@ QUnit.module('Views', {
             "should have formatted the datetime");
         list.destroy();
     });
+
+    QUnit.test('edit a row by clicking on a readonly field', function (assert) {
+        assert.expect(8);
+
+        this.data.foo.fields.foo.readonly = true;
+
+        var list = createView({
+            View: ListView,
+            model: 'foo',
+            data: this.data,
+            arch: '<tree editable="bottom"><field name="foo"/><field name="int_field"/></tree>',
+        });
+
+        assert.ok(list.$('.o_data_row:first td:nth(1)').hasClass('o_readonly'),
+            "foo field cells should have class 'o_readonly'");
+
+        // edit the first row
+        list.$('.o_data_row:first td:nth(1)').click();
+        assert.ok(list.$('.o_data_row:first').hasClass('o_selected_row'),
+            "first row should be selected");
+        assert.ok(list.$('.o_data_row:first td:nth(1)').hasClass('o_readonly'),
+            "foo field cells should have class 'o_readonly'");
+        assert.strictEqual(list.$('.o_data_row:first td:nth(1)').text(), 'yop',
+            "no widget should be rendered for readonly fields");
+        assert.ok(list.$('.o_data_row:first td:nth(2)').hasClass('o_edit_mode'),
+            "field 'int_field' should be in edition");
+        assert.strictEqual(list.$('.o_data_row:first td:nth(2) input').length, 1,
+            "a widget for field 'int_field should have been rendered'");
+
+        // click again on readonly cell of first line: nothing should have changed
+        list.$('.o_data_row:first td:nth(1)').click();
+        assert.ok(list.$('.o_data_row:first').hasClass('o_selected_row'),
+            "first row should be selected");
+        assert.strictEqual(list.$('.o_data_row:first td:nth(2) input').length, 1,
+            "a widget for field 'int_field' should have been rendered (only once)");
+
+        list.destroy();
+    });
 });
 
 });