mirror of
https://github.com/jellyfin/jellyfin-web.git
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442 lines
14 KiB
HTML
442 lines
14 KiB
HTML
<!--
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@license
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Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
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This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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Code distributed by Google as part of the polymer project is also
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subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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-->
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<link rel="import" href="../polymer/polymer.html">
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<link rel="import" href="../iron-resizable-behavior/iron-resizable-behavior.html">
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<link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
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<link rel="import" href="../iron-behaviors/iron-control-state.html">
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<link rel="import" href="../iron-overlay-behavior/iron-overlay-behavior.html">
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<link rel="import" href="../neon-animation/neon-animation-runner-behavior.html">
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<link rel="import" href="../neon-animation/animations/opaque-animation.html">
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<link rel="import" href="iron-dropdown-scroll-manager.html">
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<!--
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`<iron-dropdown>` is a generalized element that is useful when you have
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hidden content (`.dropdown-content`) that is revealed due to some change in
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state that should cause it to do so.
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Note that this is a low-level element intended to be used as part of other
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composite elements that cause dropdowns to be revealed.
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Examples of elements that might be implemented using an `iron-dropdown`
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include comboboxes, menubuttons, selects. The list goes on.
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The `<iron-dropdown>` element exposes attributes that allow the position
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of the `.dropdown-content` relative to the `.dropdown-trigger` to be
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configured.
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<iron-dropdown horizontal-align="right" vertical-align="top">
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<div class="dropdown-content">Hello!</div>
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</iron-dropdown>
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In the above example, the `<div>` with class `.dropdown-content` will be
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hidden until the dropdown element has `opened` set to true, or when the `open`
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method is called on the element.
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@demo demo/index.html
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-->
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<dom-module id="iron-dropdown">
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<style>
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:host {
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position: fixed;
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}
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#contentWrapper ::content > * {
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overflow: auto;
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}
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#contentWrapper.animating ::content > * {
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overflow: hidden;
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}
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</style>
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<template>
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<div id="contentWrapper">
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<content id="content" select=".dropdown-content"></content>
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</div>
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</template>
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<script>
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(function() {
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'use strict';
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Polymer({
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is: 'iron-dropdown',
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behaviors: [
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Polymer.IronControlState,
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Polymer.IronA11yKeysBehavior,
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Polymer.IronOverlayBehavior,
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Polymer.NeonAnimationRunnerBehavior
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],
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properties: {
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/**
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* The orientation against which to align the dropdown content
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* horizontally relative to the dropdown trigger.
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*/
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horizontalAlign: {
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type: String,
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value: 'left',
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reflectToAttribute: true
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},
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/**
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* The orientation against which to align the dropdown content
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* vertically relative to the dropdown trigger.
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*/
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verticalAlign: {
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type: String,
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value: 'top',
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reflectToAttribute: true
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},
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/**
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* A pixel value that will be added to the position calculated for the
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* given `horizontalAlign`. Use a negative value to offset to the
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* left, or a positive value to offset to the right.
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*/
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horizontalOffset: {
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type: Number,
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value: 0,
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notify: true
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},
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/**
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* A pixel value that will be added to the position calculated for the
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* given `verticalAlign`. Use a negative value to offset towards the
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* top, or a positive value to offset towards the bottom.
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*/
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verticalOffset: {
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type: Number,
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value: 0,
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notify: true
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},
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/**
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* The element that should be used to position the dropdown when
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* it is opened.
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*/
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positionTarget: {
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type: Object,
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observer: '_positionTargetChanged'
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},
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/**
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* An animation config. If provided, this will be used to animate the
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* opening of the dropdown.
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*/
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openAnimationConfig: {
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type: Object
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},
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/**
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* An animation config. If provided, this will be used to animate the
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* closing of the dropdown.
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*/
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closeAnimationConfig: {
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type: Object
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},
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/**
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* If provided, this will be the element that will be focused when
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* the dropdown opens.
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*/
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focusTarget: {
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type: Object
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},
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/**
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* Set to true to disable animations when opening and closing the
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* dropdown.
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*/
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noAnimations: {
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type: Boolean,
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value: false
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},
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/**
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* We memoize the positionTarget bounding rectangle so that we can
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* limit the number of times it is queried per resize / relayout.
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* @type {?Object}
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*/
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_positionRectMemo: {
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type: Object
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}
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},
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listeners: {
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'neon-animation-finish': '_onNeonAnimationFinish'
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},
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observers: [
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'_updateOverlayPosition(verticalAlign, horizontalAlign, verticalOffset, horizontalOffset)'
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],
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attached: function() {
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if (this.positionTarget === undefined) {
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this.positionTarget = this._defaultPositionTarget;
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}
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},
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/**
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* The element that is contained by the dropdown, if any.
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*/
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get containedElement() {
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return Polymer.dom(this.$.content).getDistributedNodes()[0];
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},
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/**
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* The element that should be focused when the dropdown opens.
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*/
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get _focusTarget() {
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return this.focusTarget || this.containedElement;
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},
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/**
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* The element that should be used to position the dropdown when
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* it opens, if no position target is configured.
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*/
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get _defaultPositionTarget() {
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var parent = Polymer.dom(this).parentNode;
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if (parent.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {
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parent = parent.host;
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}
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return parent;
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},
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/**
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* The bounding rect of the position target.
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*/
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get _positionRect() {
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if (!this._positionRectMemo && this.positionTarget) {
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this._positionRectMemo = this.positionTarget.getBoundingClientRect();
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}
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return this._positionRectMemo;
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},
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/**
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* The horizontal offset value used to position the dropdown.
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*/
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get _horizontalAlignTargetValue() {
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var target;
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if (this.horizontalAlign === 'right') {
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target = document.documentElement.clientWidth - this._positionRect.right;
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} else {
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target = this._positionRect.left;
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}
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target += this.horizontalOffset;
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return Math.max(target, 0);
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},
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/**
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* The vertical offset value used to position the dropdown.
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*/
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get _verticalAlignTargetValue() {
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var target;
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if (this.verticalAlign === 'bottom') {
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target = document.documentElement.clientHeight - this._positionRect.bottom;
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} else {
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target = this._positionRect.top;
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}
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target += this.verticalOffset;
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return Math.max(target, 0);
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},
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/**
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* Called when the value of `opened` changes.
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*
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* @param {boolean} opened True if the dropdown is opened.
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*/
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_openedChanged: function(opened) {
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if (opened && this.disabled) {
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this.cancel();
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} else {
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this.cancelAnimation();
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this._prepareDropdown();
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Polymer.IronOverlayBehaviorImpl._openedChanged.apply(this, arguments);
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}
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if (this.opened) {
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this._focusContent();
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}
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},
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/**
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* Overridden from `IronOverlayBehavior`.
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*/
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_renderOpened: function() {
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Polymer.IronDropdownScrollManager.pushScrollLock(this);
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if (!this.noAnimations && this.animationConfig && this.animationConfig.open) {
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this.$.contentWrapper.classList.add('animating');
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this.playAnimation('open');
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} else {
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Polymer.IronOverlayBehaviorImpl._renderOpened.apply(this, arguments);
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}
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},
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/**
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* Overridden from `IronOverlayBehavior`.
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*/
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_renderClosed: function() {
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Polymer.IronDropdownScrollManager.removeScrollLock(this);
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if (!this.noAnimations && this.animationConfig && this.animationConfig.close) {
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this.$.contentWrapper.classList.add('animating');
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this.playAnimation('close');
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} else {
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Polymer.IronOverlayBehaviorImpl._renderClosed.apply(this, arguments);
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}
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},
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/**
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* Called when animation finishes on the dropdown (when opening or
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* closing). Responsible for "completing" the process of opening or
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* closing the dropdown by positioning it or setting its display to
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* none.
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*/
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_onNeonAnimationFinish: function() {
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this.$.contentWrapper.classList.remove('animating');
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if (this.opened) {
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Polymer.IronOverlayBehaviorImpl._renderOpened.apply(this);
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} else {
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Polymer.IronOverlayBehaviorImpl._renderClosed.apply(this);
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}
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},
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/**
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* Called when an `iron-resize` event fires.
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*/
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_onIronResize: function() {
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var containedElement = this.containedElement;
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var scrollTop;
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var scrollLeft;
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if (containedElement) {
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scrollTop = containedElement.scrollTop;
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scrollLeft = containedElement.scrollLeft;
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}
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if (this.opened) {
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this._updateOverlayPosition();
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}
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Polymer.IronOverlayBehaviorImpl._onIronResize.apply(this, arguments);
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if (containedElement) {
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containedElement.scrollTop = scrollTop;
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containedElement.scrollLeft = scrollLeft;
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}
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},
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/**
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* Called when the `positionTarget` property changes.
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*/
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_positionTargetChanged: function() {
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this._updateOverlayPosition();
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},
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/**
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* Constructs the final animation config from different properties used
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* to configure specific parts of the opening and closing animations.
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*/
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_updateAnimationConfig: function() {
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var animationConfig = {};
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var animations = [];
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if (this.openAnimationConfig) {
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// NOTE(cdata): When making `display:none` elements visible in Safari,
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// the element will paint once in a fully visible state, causing the
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// dropdown to flash before it fades in. We prepend an
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// `opaque-animation` to fix this problem:
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animationConfig.open = [{
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name: 'opaque-animation',
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}].concat(this.openAnimationConfig);
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animations = animations.concat(animationConfig.open);
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}
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if (this.closeAnimationConfig) {
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animationConfig.close = this.closeAnimationConfig;
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animations = animations.concat(animationConfig.close);
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}
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animations.forEach(function(animation) {
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animation.node = this.containedElement;
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}, this);
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this.animationConfig = animationConfig;
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},
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/**
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* Prepares the dropdown for opening by updating measured layout
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* values.
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*/
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_prepareDropdown: function() {
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this.sizingTarget = this.containedElement || this.sizingTarget;
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this._updateAnimationConfig();
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this._updateOverlayPosition();
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},
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/**
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* Updates the overlay position based on configured horizontal
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* and vertical alignment, and re-memoizes these values for the sake
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* of behavior in `IronFitBehavior`.
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*/
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_updateOverlayPosition: function() {
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this._positionRectMemo = null;
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if (!this.positionTarget) {
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return;
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}
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this.style[this.horizontalAlign] =
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this._horizontalAlignTargetValue + 'px';
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this.style[this.verticalAlign] =
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this._verticalAlignTargetValue + 'px';
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// NOTE(cdata): We re-memoize inline styles here, otherwise
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// calling `refit` from `IronFitBehavior` will reset inline styles
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// to whatever they were when the dropdown first opened.
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if (this._fitInfo) {
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this._fitInfo.inlineStyle[this.horizontalAlign] =
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this.style[this.horizontalAlign];
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this._fitInfo.inlineStyle[this.verticalAlign] =
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this.style[this.verticalAlign];
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}
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},
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/**
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* Focuses the configured focus target.
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*/
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_focusContent: function() {
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// NOTE(cdata): This is async so that it can attempt the focus after
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// `display: none` is removed from the element.
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this.async(function() {
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if (this._focusTarget) {
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this._focusTarget.focus();
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}
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});
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}
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});
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})();
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</script>
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</dom-module>
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