e5191a55df
The navigation from the settings view is going to get used for admin pages. Break this out into a separate element. Also add shared styles for pages that use the nav. It should be separate from the form styles because form styles are geared towards styling form elements rather than the page that houses the form. Change-Id: I6a4f0ccd10af3211b737b7573a4f8cf34e68a9ee
63 lines
1.7 KiB
JavaScript
63 lines
1.7 KiB
JavaScript
// Copyright (C) 2017 The Android Open Source Project
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
(function() {
|
|
'use strict';
|
|
|
|
Polymer({
|
|
is: 'gr-page-nav',
|
|
|
|
properties: {
|
|
_headerHeight: Number,
|
|
},
|
|
|
|
attached() {
|
|
this.listen(window, 'scroll', '_handleBodyScroll');
|
|
},
|
|
|
|
detached() {
|
|
this.unlisten(window, 'scroll', '_handleBodyScroll');
|
|
},
|
|
|
|
_handleBodyScroll() {
|
|
if (this._headerHeight === undefined) {
|
|
let top = this._getOffsetTop(this);
|
|
// Don't want to include the element that wraps around the nav, start
|
|
// with its parent.
|
|
for (let offsetParent = this._getOffsetParent(this.offsetParent);
|
|
offsetParent;
|
|
offsetParent = this._getOffsetParent(offsetParent)) {
|
|
top += this._getOffsetTop(offsetParent);
|
|
}
|
|
this._headerHeight = top;
|
|
}
|
|
|
|
this.$.nav.classList.toggle('pinned',
|
|
this._getScrollY() >= this._headerHeight);
|
|
},
|
|
|
|
/* Functions used for test purposes */
|
|
_getOffsetParent(element) {
|
|
return element.offsetParent;
|
|
},
|
|
|
|
_getOffsetTop(element) {
|
|
return element.offsetTop;
|
|
},
|
|
|
|
_getScrollY() {
|
|
return window.scrollY;
|
|
},
|
|
});
|
|
})();
|