472 lines
16 KiB
JavaScript
472 lines
16 KiB
JavaScript
/**
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* $us.scroll
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*
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* ScrollSpy, Smooth scroll links and hash-based scrolling all-in-one
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*
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* @requires $us.canvas
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*/
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! function( $ ) {
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"use strict";
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function USScroll( options ) {
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// Setting options
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var defaults = {
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/**
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* @param {String|jQuery} Selector or object of hash scroll anchors that should be attached on init
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*/
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attachOnInit: '.menu-item a[href*="#"], .menu-item[href*="#"], a.w-btn[href*="#"], .w-text a[href*="#"], ' + '.vc_icon_element a[href*="#"], .vc_custom_heading a[href*="#"], a.w-grid-item-anchor[href*="#"], .w-toplink, ' + '.w-image a[href*="#"], .w-iconbox a[href*="#"], .w-comments-title a[href*="#"], a.smooth-scroll[href*="#"]',
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/**
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* @param {String} Classname that will be toggled on relevant buttons
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*/
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buttonActiveClass: 'active',
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/**
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* @param {String} Classname that will be toggled on relevant menu items
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*/
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menuItemActiveClass: 'current-menu-item',
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/**
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* @param {String} Classname that will be toggled on relevant menu ancestors
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*/
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menuItemAncestorActiveClass: 'current-menu-ancestor',
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/**
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* @param {Number} Duration of scroll animation
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*/
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animationDuration: $us.canvasOptions.scrollDuration,
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/**
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* @param {String} Easing for scroll animation
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*/
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animationEasing: 'easeInOutExpo'
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};
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this.options = $.extend( {}, defaults, options || {} );
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// Hash blocks with targets and activity indicators
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this.blocks = {};
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// Is scrolling to some specific block at the moment?
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this.isScrolling = false;
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// Waypoints that will be called at certain scroll position
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this.waypoints = [];
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// Sticky rows
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this.stickyRows = [];//$('.l-section.type_sticky');
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// Boundable events
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this._events = {
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cancel: this.cancel.bind( this ), scroll: this.scroll.bind( this ), resize: this.resize.bind( this )
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};
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this._canvasTopOffset = 0;
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$us.$window.on( 'resize load', this._events.resize );
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setTimeout( this._events.resize, 75 );
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$us.$window.on( 'scroll', this._events.scroll );
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setTimeout( this._events.scroll, 75 );
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if ( this.options.attachOnInit ) {
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this.attach( this.options.attachOnInit );
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}
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$( '.l-section.type_sticky' ).each( function( key, row ) {
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var $row = $( row ), $rowGap = $row.next( '.l-section-gap' ), stickyRow = {
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$row: $row, $rowGap: $rowGap
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};
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this._countStickyRow( stickyRow );
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this.stickyRows.push( stickyRow );
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}.bind( this ) );
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// Recount scroll positions on any content changes
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$us.$canvas.on( 'contentChange', this._countAllPositions.bind( this ) );
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// Handling initial document hash
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if ( document.location.hash && document.location.hash.indexOf( '#!' ) == - 1 ) {
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var hash = document.location.hash, scrollPlace = ( this.blocks[ hash ] !== undefined ) ? hash : undefined;
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if ( scrollPlace === undefined ) {
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try {
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var $target = $( hash );
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if ( $target.length != 0 ) {
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scrollPlace = $target;
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}
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}
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catch ( error ) {
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//Do not have to do anything here since scrollPlace is already undefined
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}
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}
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if ( scrollPlace !== undefined ) {
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// While page loads, its content changes, and we'll keep the proper scroll on each sufficient content
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// change until the page finishes loading or user scrolls the page manually
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var keepScrollPositionTimer = setInterval( function() {
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this.scrollTo( scrollPlace );
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}.bind( this ), 100 );
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var clearHashEvents = function() {
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// Content size still may change via other script right after page load
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setTimeout( function() {
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clearInterval( keepScrollPositionTimer );
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$us.canvas.resize();
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this._countAllPositions();
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this.scrollTo( scrollPlace );
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}.bind( this ), 100 );
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$us.$window.off( 'load touchstart mousewheel DOMMouseScroll touchstart', clearHashEvents );
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}.bind( this );
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$us.$window.on( 'load touchstart mousewheel DOMMouseScroll touchstart', clearHashEvents );
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}
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}
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}
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USScroll.prototype = {
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/**
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* Count hash's target position and store it properly
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*
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* @param {String} hash
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* @private
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*/
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_countPosition: function( hash ) {
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var targetTop = this.blocks[ hash ].target.offset().top;
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if ( this.blocks[ hash ].target.is( '.l-section.sticky' ) ) {
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this.blocks[ hash ].target.removeClass( 'sticky' );
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targetTop = this.blocks[ hash ].target.offset().top;
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this.blocks[ hash ].target.addClass( 'sticky' );
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}
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this.blocks[ hash ].top = Math.ceil( targetTop - this._canvasTopOffset );
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if ( $us.header.headerTop === undefined || ( $us.header.headerTop > 0 && targetTop > $us.header.headerTop ) ) {
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this.blocks[ hash ].top = this.blocks[ hash ].top - $us.header.scrolledOccupiedHeight;
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}
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if ( this.stickyRows[ 0 ] !== undefined && window.innerWidth > this.stickyRows[ 0 ].disableWidth && targetTop > this.stickyRows[ 0 ].originalTop ) {
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this.blocks[ hash ].top = this.blocks[ hash ].top - this.stickyRows[ 0 ].height;
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}
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this.blocks[ hash ].bottom = this.blocks[ hash ].top + this.blocks[ hash ].target.outerHeight( false );
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},
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/**
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* Count all targets' positions for proper scrolling
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*
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* @private
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*/
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_countAllPositions: function() {
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// Take into account #wpadminbar (and others possible) offset
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this._canvasTopOffset = $us.$canvas.offset().top;
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// Counting stickyRows
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for ( var i = 0; i < this.stickyRows.length; i ++ ) {
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this._countStickyRow( this.stickyRows[ i ] );
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}
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// Counting blocks
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for ( var hash in this.blocks ) {
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if ( ! this.blocks.hasOwnProperty( hash ) ) {
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continue;
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}
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this._countPosition( hash );
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}
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// Counting waypoints
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for ( var i = 0; i < this.waypoints.length; i ++ ) {
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this._countWaypoint( this.waypoints[ i ] );
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}
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},
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/**
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* Indicate scroll position by hash
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*
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* @param {String} activeHash
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* @private
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*/
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_indicatePosition: function( activeHash ) {
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var activeMenuAncestors = [];
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for ( var hash in this.blocks ) {
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if ( ! this.blocks.hasOwnProperty( hash ) ) {
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continue;
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}
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if ( this.blocks[ hash ].buttons !== undefined ) {
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this.blocks[ hash ].buttons.toggleClass( this.options.buttonActiveClass, hash === activeHash );
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}
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if ( this.blocks[ hash ].menuItems !== undefined ) {
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this.blocks[ hash ].menuItems.toggleClass( this.options.menuItemActiveClass, hash === activeHash );
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}
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if ( this.blocks[ hash ].menuAncestors !== undefined ) {
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this.blocks[ hash ].menuAncestors.removeClass( this.options.menuItemAncestorActiveClass );
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}
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}
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if ( this.blocks[ activeHash ] !== undefined && this.blocks[ activeHash ].menuAncestors !== undefined ) {
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this.blocks[ activeHash ].menuAncestors.addClass( this.options.menuItemAncestorActiveClass );
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}
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},
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/**
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* Attach anchors so their targets will be listened for possible scrolls
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*
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* @param {String|jQuery} anchors Selector or list of anchors to attach
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*/
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attach: function( anchors ) {
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// Location pattern to check absolute URLs for current location
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var locationPattern = new RegExp( '^' + location.pathname.replace( /[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&" ) + '#' );
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var $anchors = $( anchors );
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if ( $anchors.length == 0 ) {
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return;
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}
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$anchors.each( function( index, anchor ) {
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var $anchor = $( anchor ), href = $anchor.attr( 'href' ), hash = $anchor.prop( 'hash' );
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// Ignoring ajax links
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if ( hash.indexOf( '#!' ) != - 1 ) {
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return;
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}
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// Checking if the hash is connected with the current page
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if ( ! ( // Link type: #something
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href.charAt( 0 ) == '#' || // Link type: /#something
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( href.charAt( 0 ) == '/' && locationPattern.test( href ) ) || // Link type:
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// http://example.com/some/path/#something
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href.indexOf( location.host + location.pathname + '#' ) > - 1 ) ) {
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return;
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}
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// Do we have an actual target, for which we'll need to count geometry?
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if ( hash != '' && hash != '#' ) {
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// Attach target
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if ( this.blocks[ hash ] === undefined ) {
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var $target = $( hash ), $type = '';
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// Don't attach anchors that actually have no target
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if ( $target.length == 0 ) {
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return;
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}
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// If it's the only row in a section, than use section instead
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if ( $target.hasClass( 'g-cols' ) && $target.parent().children().length == 1 ) {
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$target = $target.closest( '.l-section' );
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}
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// If it's tabs or tour item, then use tabs container
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if ( $target.hasClass( 'w-tabs-section' ) ) {
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var $newTarget = $target.closest( '.w-tabs' );
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if ( ! $newTarget.hasClass( 'accordion' ) ) {
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$target = $newTarget;
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$type = 'tab';
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}
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}
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this.blocks[ hash ] = {
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target: $target, type: $type
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};
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this._countPosition( hash );
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}
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// Attach activity indicator
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if ( $anchor.parent().length > 0 && $anchor.parent().hasClass( 'menu-item' ) ) {
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var $menuIndicator = $anchor.closest( '.menu-item' );
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this.blocks[ hash ].menuItems = ( this.blocks[ hash ].menuItems || $() ).add( $menuIndicator );
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var $menuAncestors = $menuIndicator.parents( '.menu-item-has-children' );
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if ( $menuAncestors.length > 0 ) {
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this.blocks[ hash ].menuAncestors = ( this.blocks[ hash ].menuAncestors || $() ).add( $menuAncestors );
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}
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} else {
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this.blocks[ hash ].buttons = ( this.blocks[ hash ].buttons || $() ).add( $anchor );
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}
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}
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$anchor.on( 'click', function( event ) {
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event.preventDefault();
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this.scrollTo( hash, true );
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//If it's tabs
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if ( typeof this.blocks[ hash ] !== 'undefined' ) {
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if ( this.blocks[ hash ].type == 'tab' ) {
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var $linkedSection = this.blocks[ hash ].target.find( '.w-tabs-section[id="' + hash.substr( 1 ) + '"]' );
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if ( $linkedSection.length && ( ! $linkedSection.hasClass( 'active' ) ) ) {
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var $header = $linkedSection.find( '.w-tabs-section-header' );
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$header.click();
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}
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}
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}
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}.bind( this ) );
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}.bind( this ) );
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},
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/**
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* Scroll page to a certain position or hash
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*
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* @param {Number|String|jQuery} place
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* @param {Boolean} animate
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*/
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scrollTo: function( place, animate ) {
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var placeType, newY;
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// Scroll to top
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if ( place == '' || place == '#' ) {
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newY = 0;
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placeType = 'top';
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}
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// Scroll by hash
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else if ( this.blocks[ place ] !== undefined ) {
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newY = this.blocks[ place ].top;
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placeType = 'hash';
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} else if ( place instanceof $ ) {
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if ( place.hasClass( 'w-tabs-section' ) ) {
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var newPlace = place.closest( '.w-tabs' );
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if ( ! newPlace.hasClass( 'accordion' ) ) {
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place = newPlace;
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}
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}
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newY = Math.floor( place.offset().top - this._canvasTopOffset );
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if ( $us.header.headerTop === undefined || ( $us.header.headerTop > 0 && place.offset().top > $us.header.headerTop ) ) {
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newY = newY - $us.header.scrolledOccupiedHeight;
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}
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placeType = 'element';
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} else {
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newY = Math.floor( place - this._canvasTopOffset );
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if ( $us.header.headerTop === undefined || ( $us.header.headerTop > 0 && place > $us.header.headerTop ) ) {
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newY = newY - $us.header.scrolledOccupiedHeight;
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}
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}
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var indicateActive = function() {
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if ( placeType == 'hash' ) {
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this._indicatePosition( place );
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} else {
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this.scroll();
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}
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}.bind( this );
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if ( animate ) {
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this.isScrolling = true;
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// Fix for iPads since scrollTop returns 0 all the time
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if ( navigator.userAgent.match( /iPad/i ) != null && $( '.us_iframe' ).length && placeType == 'hash' ) {
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$( place )[ 0 ].scrollIntoView( { behavior: "smooth", block: "start" } );
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}
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$us.$htmlBody.stop( true, false ).animate( {
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scrollTop: newY + 'px'
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}, {
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duration: this.options.animationDuration, easing: this.options.animationEasing, always: function() {
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$us.$window.off( 'keydown mousewheel DOMMouseScroll touchstart', this._events.cancel );
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this.isScrolling = false;
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indicateActive();
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}.bind( this )
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} );
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// Allow user to stop scrolling manually
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$us.$window.on( 'keydown mousewheel DOMMouseScroll touchstart', this._events.cancel );
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} else {
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$us.$htmlBody.stop( true, false ).scrollTop( newY );
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indicateActive();
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}
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},
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/**
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* Cancel scroll
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*/
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cancel: function() {
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$us.$htmlBody.stop( true, false );
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},
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/**
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* Add new waypoint
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*
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* @param {jQuery} $elm object with the element
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* @param {mixed} offset Offset from bottom of screen in pixels ('100') or percents ('20%')
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* @param {Function} fn The function that will be called
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*/
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addWaypoint: function( $elm, offset, fn ) {
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$elm = ( $elm instanceof $ ) ? $elm : $( $elm );
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if ( $elm.length == 0 ) {
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return;
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}
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if ( typeof offset != 'string' || offset.indexOf( '%' ) == - 1 ) {
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// Not percent: using pixels
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offset = parseInt( offset );
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}
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var waypoint = {
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$elm: $elm, offset: offset, fn: fn
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};
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this._countWaypoint( waypoint );
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this.waypoints.push( waypoint );
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},
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/**
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*
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* @param {Object} waypoint
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* @private
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*/
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_countWaypoint: function( waypoint ) {
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var elmTop = waypoint.$elm.offset().top, winHeight = $us.$window.height();
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if ( typeof waypoint.offset == 'number' ) {
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// Offset is defined in pixels
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waypoint.scrollPos = elmTop - winHeight + waypoint.offset;
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} else {
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// Offset is defined in percents
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waypoint.scrollPos = elmTop - winHeight + winHeight * parseInt( waypoint.offset ) / 100;
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}
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},
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/**
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*
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* @param {Object} stickyRow
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* @private
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*/
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_countStickyRow: function( stickyRow ) {
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var isSticky = false;
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if ( stickyRow.$row.hasClass( 'sticky' ) ) {
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isSticky = true;
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stickyRow.$row.removeClass( 'sticky' );
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}
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stickyRow.disableWidth = ( stickyRow.$row.data( 'sticky-disable-width' ) !== undefined ) ? stickyRow.$row.data( 'sticky-disable-width' ) : 900;
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stickyRow.originalTop = stickyRow.$row.offset().top;
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stickyRow.top = stickyRow.$row.offset().top - this._canvasTopOffset;
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if ( $us.header.headerTop === undefined || ( $us.header.headerTop > 0 && stickyRow.top > $us.header.headerTop ) ) {
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stickyRow.top = stickyRow.top - $us.header.scrolledOccupiedHeight;
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}
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stickyRow.height = stickyRow.$row.outerHeight();
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if ( stickyRow.$row.is( '.l-main .l-section:first-child' ) ) {
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stickyRow.height = stickyRow.height - parseInt( stickyRow.$row.css( 'padding-top' ) );
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}
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if ( isSticky ) {
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stickyRow.$row.addClass( 'sticky' );
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}
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},
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/**
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* Scroll handler
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*/
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scroll: function() {
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var scrollTop = parseInt( $us.$window.scrollTop() );
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if ( ! this.isScrolling ) {
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var activeHash;
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for ( var hash in this.blocks ) {
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if ( ! this.blocks.hasOwnProperty( hash ) ) {
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continue;
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}
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if ( scrollTop >= ( this.blocks[ hash ].top - 1 ) && scrollTop < ( this.blocks[ hash ].bottom - 1 ) ) {
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activeHash = hash;
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break;
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}
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}
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this._indicatePosition( activeHash );
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}
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// Handling sticky rows
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for ( var i = 0; i < this.stickyRows.length; i ++ ) {
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if ( this.stickyRows[ i ].top < scrollTop && window.innerWidth > this.stickyRows[ i ].disableWidth ) {
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this.stickyRows[ i ].$row.addClass( 'sticky' );
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this.stickyRows[ i ].$rowGap.css( 'height', this.stickyRows[ i ].height );
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} else {
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this.stickyRows[ i ].$row.removeClass( 'sticky' );
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this.stickyRows[ i ].$rowGap.css( 'height', null );
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}
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}
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// Handling waypoints
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for ( var i = 0; i < this.waypoints.length; i ++ ) {
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if ( this.waypoints[ i ].scrollPos < scrollTop ) {
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this.waypoints[ i ].fn( this.waypoints[ i ].$elm );
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this.waypoints.splice( i, 1 );
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i --;
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}
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}
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},
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/**
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* Resize handler
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*/
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resize: function() {
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// Delaying the resize event to prevent glitches
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setTimeout( function() {
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this._countAllPositions();
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this.scroll();
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}.bind( this ), 150 );
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this._countAllPositions();
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this.scroll();
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}
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};
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$( function() {
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$us.scroll = new USScroll( $us.scrollOptions || {} );
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} );
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}( jQuery ); |