581 lines
16 KiB
JavaScript
581 lines
16 KiB
JavaScript
(function($, anim) {
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'use strict';
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let _defaults = {
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edge: 'left',
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draggable: true,
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inDuration: 250,
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outDuration: 200,
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onOpenStart: null,
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onOpenEnd: null,
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onCloseStart: null,
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onCloseEnd: null,
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preventScrolling: true
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};
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/**
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* @class
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*/
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class Sidenav extends Component {
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/**
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* Construct Sidenav instance and set up overlay
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* @constructor
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* @param {Element} el
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* @param {Object} options
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*/
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constructor(el, options) {
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super(Sidenav, el, options);
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this.el.M_Sidenav = this;
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this.id = this.$el.attr('id');
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/**
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* Options for the Sidenav
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* @member Sidenav#options
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* @prop {String} [edge='left'] - Side of screen on which Sidenav appears
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* @prop {Boolean} [draggable=true] - Allow swipe gestures to open/close Sidenav
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* @prop {Number} [inDuration=250] - Length in ms of enter transition
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* @prop {Number} [outDuration=200] - Length in ms of exit transition
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* @prop {Function} onOpenStart - Function called when sidenav starts entering
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* @prop {Function} onOpenEnd - Function called when sidenav finishes entering
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* @prop {Function} onCloseStart - Function called when sidenav starts exiting
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* @prop {Function} onCloseEnd - Function called when sidenav finishes exiting
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*/
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this.options = $.extend({}, Sidenav.defaults, options);
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/**
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* Describes open/close state of Sidenav
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* @type {Boolean}
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*/
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this.isOpen = false;
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/**
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* Describes if Sidenav is fixed
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* @type {Boolean}
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*/
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this.isFixed = this.el.classList.contains('sidenav-fixed');
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/**
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* Describes if Sidenav is being draggeed
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* @type {Boolean}
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*/
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this.isDragged = false;
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// Window size variables for window resize checks
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this.lastWindowWidth = window.innerWidth;
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this.lastWindowHeight = window.innerHeight;
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this._createOverlay();
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this._createDragTarget();
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this._setupEventHandlers();
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this._setupClasses();
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this._setupFixed();
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Sidenav._sidenavs.push(this);
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}
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static get defaults() {
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return _defaults;
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}
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static init(els, options) {
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return super.init(this, els, options);
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}
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/**
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* Get Instance
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*/
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static getInstance(el) {
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let domElem = !!el.jquery ? el[0] : el;
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return domElem.M_Sidenav;
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}
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/**
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* Teardown component
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*/
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destroy() {
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this._removeEventHandlers();
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this._enableBodyScrolling();
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this._overlay.parentNode.removeChild(this._overlay);
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this.dragTarget.parentNode.removeChild(this.dragTarget);
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this.el.M_Sidenav = undefined;
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this.el.style.transform = '';
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let index = Sidenav._sidenavs.indexOf(this);
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if (index >= 0) {
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Sidenav._sidenavs.splice(index, 1);
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}
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}
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_createOverlay() {
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let overlay = document.createElement('div');
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this._closeBound = this.close.bind(this);
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overlay.classList.add('sidenav-overlay');
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overlay.addEventListener('click', this._closeBound);
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document.body.appendChild(overlay);
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this._overlay = overlay;
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}
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_setupEventHandlers() {
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if (Sidenav._sidenavs.length === 0) {
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document.body.addEventListener('click', this._handleTriggerClick);
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}
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this._handleDragTargetDragBound = this._handleDragTargetDrag.bind(this);
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this._handleDragTargetReleaseBound = this._handleDragTargetRelease.bind(this);
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this._handleCloseDragBound = this._handleCloseDrag.bind(this);
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this._handleCloseReleaseBound = this._handleCloseRelease.bind(this);
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this._handleCloseTriggerClickBound = this._handleCloseTriggerClick.bind(this);
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this.dragTarget.addEventListener('touchmove', this._handleDragTargetDragBound);
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this.dragTarget.addEventListener('touchend', this._handleDragTargetReleaseBound);
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this._overlay.addEventListener('touchmove', this._handleCloseDragBound);
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this._overlay.addEventListener('touchend', this._handleCloseReleaseBound);
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this.el.addEventListener('touchmove', this._handleCloseDragBound);
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this.el.addEventListener('touchend', this._handleCloseReleaseBound);
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this.el.addEventListener('click', this._handleCloseTriggerClickBound);
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// Add resize for side nav fixed
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if (this.isFixed) {
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this._handleWindowResizeBound = this._handleWindowResize.bind(this);
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window.addEventListener('resize', this._handleWindowResizeBound);
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}
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}
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_removeEventHandlers() {
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if (Sidenav._sidenavs.length === 1) {
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document.body.removeEventListener('click', this._handleTriggerClick);
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}
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this.dragTarget.removeEventListener('touchmove', this._handleDragTargetDragBound);
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this.dragTarget.removeEventListener('touchend', this._handleDragTargetReleaseBound);
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this._overlay.removeEventListener('touchmove', this._handleCloseDragBound);
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this._overlay.removeEventListener('touchend', this._handleCloseReleaseBound);
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this.el.removeEventListener('touchmove', this._handleCloseDragBound);
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this.el.removeEventListener('touchend', this._handleCloseReleaseBound);
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this.el.removeEventListener('click', this._handleCloseTriggerClickBound);
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// Remove resize for side nav fixed
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if (this.isFixed) {
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window.removeEventListener('resize', this._handleWindowResizeBound);
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}
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}
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/**
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* Handle Trigger Click
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* @param {Event} e
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*/
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_handleTriggerClick(e) {
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let $trigger = $(e.target).closest('.sidenav-trigger');
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if (e.target && $trigger.length) {
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let sidenavId = M.getIdFromTrigger($trigger[0]);
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let sidenavInstance = document.getElementById(sidenavId).M_Sidenav;
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if (sidenavInstance) {
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sidenavInstance.open($trigger);
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}
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e.preventDefault();
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}
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}
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/**
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* Set variables needed at the beggining of drag
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* and stop any current transition.
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* @param {Event} e
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*/
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_startDrag(e) {
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let clientX = e.targetTouches[0].clientX;
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this.isDragged = true;
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this._startingXpos = clientX;
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this._xPos = this._startingXpos;
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this._time = Date.now();
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this._width = this.el.getBoundingClientRect().width;
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this._overlay.style.display = 'block';
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this._initialScrollTop = this.isOpen ? this.el.scrollTop : M.getDocumentScrollTop();
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this._verticallyScrolling = false;
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anim.remove(this.el);
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anim.remove(this._overlay);
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}
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/**
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* Set variables needed at each drag move update tick
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* @param {Event} e
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*/
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_dragMoveUpdate(e) {
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let clientX = e.targetTouches[0].clientX;
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let currentScrollTop = this.isOpen ? this.el.scrollTop : M.getDocumentScrollTop();
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this.deltaX = Math.abs(this._xPos - clientX);
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this._xPos = clientX;
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this.velocityX = this.deltaX / (Date.now() - this._time);
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this._time = Date.now();
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if (this._initialScrollTop !== currentScrollTop) {
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this._verticallyScrolling = true;
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}
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}
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/**
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* Handles Dragging of Sidenav
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* @param {Event} e
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*/
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_handleDragTargetDrag(e) {
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// Check if draggable
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if (!this.options.draggable || this._isCurrentlyFixed() || this._verticallyScrolling) {
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return;
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}
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// If not being dragged, set initial drag start variables
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if (!this.isDragged) {
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this._startDrag(e);
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}
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// Run touchmove updates
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this._dragMoveUpdate(e);
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// Calculate raw deltaX
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let totalDeltaX = this._xPos - this._startingXpos;
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// dragDirection is the attempted user drag direction
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let dragDirection = totalDeltaX > 0 ? 'right' : 'left';
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// Don't allow totalDeltaX to exceed Sidenav width or be dragged in the opposite direction
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totalDeltaX = Math.min(this._width, Math.abs(totalDeltaX));
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if (this.options.edge === dragDirection) {
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totalDeltaX = 0;
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}
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/**
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* transformX is the drag displacement
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* transformPrefix is the initial transform placement
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* Invert values if Sidenav is right edge
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*/
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let transformX = totalDeltaX;
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let transformPrefix = 'translateX(-100%)';
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if (this.options.edge === 'right') {
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transformPrefix = 'translateX(100%)';
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transformX = -transformX;
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}
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// Calculate open/close percentage of sidenav, with open = 1 and close = 0
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this.percentOpen = Math.min(1, totalDeltaX / this._width);
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// Set transform and opacity styles
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this.el.style.transform = `${transformPrefix} translateX(${transformX}px)`;
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this._overlay.style.opacity = this.percentOpen;
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}
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/**
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* Handle Drag Target Release
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*/
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_handleDragTargetRelease() {
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if (this.isDragged) {
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if (this.percentOpen > 0.2) {
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this.open();
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} else {
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this._animateOut();
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}
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this.isDragged = false;
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this._verticallyScrolling = false;
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}
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}
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/**
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* Handle Close Drag
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* @param {Event} e
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*/
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_handleCloseDrag(e) {
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if (this.isOpen) {
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// Check if draggable
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if (!this.options.draggable || this._isCurrentlyFixed() || this._verticallyScrolling) {
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return;
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}
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// If not being dragged, set initial drag start variables
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if (!this.isDragged) {
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this._startDrag(e);
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}
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// Run touchmove updates
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this._dragMoveUpdate(e);
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// Calculate raw deltaX
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let totalDeltaX = this._xPos - this._startingXpos;
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// dragDirection is the attempted user drag direction
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let dragDirection = totalDeltaX > 0 ? 'right' : 'left';
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// Don't allow totalDeltaX to exceed Sidenav width or be dragged in the opposite direction
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totalDeltaX = Math.min(this._width, Math.abs(totalDeltaX));
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if (this.options.edge !== dragDirection) {
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totalDeltaX = 0;
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}
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let transformX = -totalDeltaX;
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if (this.options.edge === 'right') {
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transformX = -transformX;
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}
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// Calculate open/close percentage of sidenav, with open = 1 and close = 0
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this.percentOpen = Math.min(1, 1 - totalDeltaX / this._width);
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// Set transform and opacity styles
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this.el.style.transform = `translateX(${transformX}px)`;
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this._overlay.style.opacity = this.percentOpen;
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}
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}
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/**
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* Handle Close Release
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*/
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_handleCloseRelease() {
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if (this.isOpen && this.isDragged) {
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if (this.percentOpen > 0.8) {
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this._animateIn();
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} else {
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this.close();
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}
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this.isDragged = false;
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this._verticallyScrolling = false;
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}
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}
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/**
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* Handles closing of Sidenav when element with class .sidenav-close
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*/
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_handleCloseTriggerClick(e) {
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let $closeTrigger = $(e.target).closest('.sidenav-close');
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if ($closeTrigger.length && !this._isCurrentlyFixed()) {
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this.close();
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}
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}
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/**
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* Handle Window Resize
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*/
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_handleWindowResize() {
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// Only handle horizontal resizes
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if (this.lastWindowWidth !== window.innerWidth) {
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if (window.innerWidth > 992) {
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this.open();
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} else {
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this.close();
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}
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}
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this.lastWindowWidth = window.innerWidth;
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this.lastWindowHeight = window.innerHeight;
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}
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_setupClasses() {
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if (this.options.edge === 'right') {
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this.el.classList.add('right-aligned');
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this.dragTarget.classList.add('right-aligned');
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}
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}
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_removeClasses() {
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this.el.classList.remove('right-aligned');
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this.dragTarget.classList.remove('right-aligned');
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}
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_setupFixed() {
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if (this._isCurrentlyFixed()) {
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this.open();
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}
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}
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_isCurrentlyFixed() {
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return this.isFixed && window.innerWidth > 992;
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}
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_createDragTarget() {
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let dragTarget = document.createElement('div');
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dragTarget.classList.add('drag-target');
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document.body.appendChild(dragTarget);
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this.dragTarget = dragTarget;
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}
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_preventBodyScrolling() {
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let body = document.body;
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body.style.overflow = 'hidden';
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}
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_enableBodyScrolling() {
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let body = document.body;
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body.style.overflow = '';
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}
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open() {
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if (this.isOpen === true) {
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return;
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}
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this.isOpen = true;
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// Run onOpenStart callback
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if (typeof this.options.onOpenStart === 'function') {
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this.options.onOpenStart.call(this, this.el);
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}
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// Handle fixed Sidenav
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if (this._isCurrentlyFixed()) {
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anim.remove(this.el);
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anim({
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targets: this.el,
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translateX: 0,
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duration: 0,
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easing: 'easeOutQuad'
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});
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this._enableBodyScrolling();
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this._overlay.style.display = 'none';
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// Handle non-fixed Sidenav
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} else {
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if (this.options.preventScrolling) {
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this._preventBodyScrolling();
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}
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if (!this.isDragged || this.percentOpen != 1) {
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this._animateIn();
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}
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}
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}
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close() {
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if (this.isOpen === false) {
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return;
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}
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this.isOpen = false;
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// Run onCloseStart callback
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if (typeof this.options.onCloseStart === 'function') {
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this.options.onCloseStart.call(this, this.el);
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}
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// Handle fixed Sidenav
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if (this._isCurrentlyFixed()) {
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let transformX = this.options.edge === 'left' ? '-105%' : '105%';
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this.el.style.transform = `translateX(${transformX})`;
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// Handle non-fixed Sidenav
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} else {
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this._enableBodyScrolling();
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if (!this.isDragged || this.percentOpen != 0) {
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this._animateOut();
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} else {
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this._overlay.style.display = 'none';
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}
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}
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}
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_animateIn() {
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this._animateSidenavIn();
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this._animateOverlayIn();
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}
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_animateSidenavIn() {
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let slideOutPercent = this.options.edge === 'left' ? -1 : 1;
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if (this.isDragged) {
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slideOutPercent =
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this.options.edge === 'left'
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? slideOutPercent + this.percentOpen
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: slideOutPercent - this.percentOpen;
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}
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anim.remove(this.el);
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anim({
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targets: this.el,
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translateX: [`${slideOutPercent * 100}%`, 0],
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duration: this.options.inDuration,
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easing: 'easeOutQuad',
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complete: () => {
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// Run onOpenEnd callback
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if (typeof this.options.onOpenEnd === 'function') {
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this.options.onOpenEnd.call(this, this.el);
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}
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}
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});
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}
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_animateOverlayIn() {
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let start = 0;
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if (this.isDragged) {
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start = this.percentOpen;
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} else {
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$(this._overlay).css({
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display: 'block'
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});
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}
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anim.remove(this._overlay);
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anim({
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targets: this._overlay,
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opacity: [start, 1],
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duration: this.options.inDuration,
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easing: 'easeOutQuad'
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});
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}
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_animateOut() {
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this._animateSidenavOut();
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this._animateOverlayOut();
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}
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_animateSidenavOut() {
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let endPercent = this.options.edge === 'left' ? -1 : 1;
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let slideOutPercent = 0;
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if (this.isDragged) {
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slideOutPercent =
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this.options.edge === 'left'
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? endPercent + this.percentOpen
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: endPercent - this.percentOpen;
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}
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anim.remove(this.el);
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anim({
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targets: this.el,
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translateX: [`${slideOutPercent * 100}%`, `${endPercent * 105}%`],
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duration: this.options.outDuration,
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easing: 'easeOutQuad',
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complete: () => {
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// Run onOpenEnd callback
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if (typeof this.options.onCloseEnd === 'function') {
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this.options.onCloseEnd.call(this, this.el);
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}
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}
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});
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}
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_animateOverlayOut() {
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anim.remove(this._overlay);
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anim({
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targets: this._overlay,
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opacity: 0,
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duration: this.options.outDuration,
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easing: 'easeOutQuad',
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complete: () => {
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$(this._overlay).css('display', 'none');
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}
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});
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}
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}
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/**
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* @static
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* @memberof Sidenav
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* @type {Array.<Sidenav>}
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*/
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Sidenav._sidenavs = [];
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M.Sidenav = Sidenav;
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if (M.jQueryLoaded) {
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M.initializeJqueryWrapper(Sidenav, 'sidenav', 'M_Sidenav');
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}
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})(cash, M.anime);
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