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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview
* 'settings-section' shows a paper material themed section with a header
* which shows its page title.
*
* Example:
*
* <settings-section page-title="[[pageTitle]]">
* <!-- Insert your section controls here -->
* </settings-section>
*
* @group Chrome Settings Elements
* @element settings-section
*/
Polymer({
is: 'settings-section',
behaviors: [
Polymer.NeonAnimationRunnerBehavior,
],
properties: {
/**
* The current active route.
*/
currentRoute: {
type: Object,
observer: 'currentRouteChanged_',
},
/**
* The section is expanded to a full-page view when this property matches
* currentRoute.section.
*/
section: {
type: String,
},
/**
* Title for the page header and navigation menu.
*/
pageTitle: String,
animationConfig: {
value: function() {
return {
collapse: {
name: 'collapse-card-animation',
node: this,
},
expand: {
name: 'expand-card-animation',
node: this,
},
};
},
},
},
listeners: {
'expand-animation-complete': 'onExpandAnimationComplete_',
},
/** @private */
currentRouteChanged_: function(newRoute, oldRoute) {
var newExpanded = newRoute.section == this.section;
var oldExpanded = oldRoute && oldRoute.section == this.section;
var visible = newExpanded || this.currentRoute.section == '';
// If the user navigates directly to a subpage, skip all the animations.
if (!oldRoute) {
if (newExpanded) {
// If we navigate directly to a subpage, skip animations.
this.classList.add('expanded');
} else if (!visible) {
this.hidden = true;
this.$.card.elevation = 0;
}
return;
}
if (newExpanded && !oldExpanded) {
this.playAnimation('expand');
} else if (oldExpanded && !newExpanded) {
// For contraction, we defer the animation to allow
// settings-animated-pages to reflow the new page correctly.
this.async(function() {
this.playAnimation('collapse');
}.bind(this));
}
this.$.card.elevation = visible ? 1 : 0;
// Remove 'hidden' class immediately, but defer adding it if we are invisble
// until the animation is complete.
if (visible)
this.hidden = false;
},
/** @private */
onExpandAnimationComplete_: function() {
this.hidden = this.currentRoute.section != '' &&
this.currentRoute.section != this.section;
},
});
Polymer({
is: 'expand-card-animation',
behaviors: [
Polymer.NeonAnimationBehavior
],
configure: function(config) {
var section = config.node;
var card = section.$.card;
var containerRect = section.offsetParent.getBoundingClientRect();
var cardRect = card.getBoundingClientRect();
// Set placeholder height so the page does not reflow during animation.
// TODO(tommycli): For URLs that directly load subpages, this does not work.
var placeholder = section.$.placeholder;
placeholder.style.top = card.offsetTop + 'px';
placeholder.style.height = card.offsetHeight + 'px';
section.classList.add('neon-animating');
this._effect = new KeyframeEffect(card, [
{'top': cardRect.top + 'px', 'height': cardRect.height + 'px'},
{'top': containerRect.top + 'px', 'height': containerRect.height + 'px'},
], this.timingFromConfig(config));
return this._effect;
},
complete: function(config) {
var section = config.node;
section.classList.remove('neon-animating');
section.classList.add('expanded');
// This event fires on itself as well, but that is benign.
var sections = section.parentNode.querySelectorAll('settings-section');
for (var i = 0; i < sections.length; ++i) {
sections[i].fire('expand-animation-complete');
}
}
});
Polymer({
is: 'collapse-card-animation',
behaviors: [
Polymer.NeonAnimationBehavior
],
configure: function(config) {
var section = config.node;
var oldRect = section.offsetParent.getBoundingClientRect();
section.classList.remove('expanded');
var card = section.$.card;
var newRect = card.getBoundingClientRect();
section.classList.add('neon-animating');
this._effect = new KeyframeEffect(card, [
{'top': oldRect.top + 'px', 'height': oldRect.height + 'px'},
{'top': newRect.top + 'px', 'height': newRect.height + 'px'},
], this.timingFromConfig(config));
return this._effect;
},
complete: function(config) {
config.node.classList.remove('neon-animating');
}
});
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