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Dir : /home/trave494/elintscleaningservices.co.uk/wp-content/themes/porto/js/loading-overlay.js

// Loading Overlay
( function( theme, $ ) {

	'use strict';

	theme = theme || {};

	var loadingOverlayTemplate = [
		'<div class="loading-overlay">',
		'<div class="loader"></div>',
		'</div>'
	].join( '' );

	var LoadingOverlay = function( $wrapper, options ) {
		return this.initialize( $wrapper, options );
	};

	LoadingOverlay.prototype = {

		options: {
			css: {}
		},

		initialize: function( $wrapper, options ) {
			this.$wrapper = $wrapper;

			this
				.setVars()
				.setOptions( options )
				.build()
				.events();

			this.$wrapper.data( 'loadingOverlay', this );
		},

		setVars: function() {
			this.$overlay = this.$wrapper.find( '.loading-overlay' );

			return this;
		},

		setOptions: function( options ) {
			if ( !this.$overlay.get( 0 ) ) {
				this.matchProperties();
			}
			this.options = $.extend( true, {}, this.options, options );
			this.loaderClass = this.getLoaderClass( this.options.css.backgroundColor );

			return this;
		},

		build: function() {
			if ( !this.$overlay.closest( document.documentElement ).get( 0 ) ) {
				if ( !this.$cachedOverlay ) {
					this.$overlay = $( loadingOverlayTemplate ).clone();

					if ( this.options.css ) {
						this.$overlay.css( this.options.css );
						this.$overlay.find( '.loader' ).addClass( this.loaderClass );
					}
				} else {
					this.$overlay = this.$cachedOverlay.clone();
				}

				this.$wrapper.append( this.$overlay );
			}

			if ( !this.$cachedOverlay ) {
				this.$cachedOverlay = this.$overlay.clone();
			}

			return this;
		},

		events: function() {
			var _self = this;

			if ( this.options.startShowing ) {
				_self.show();
			}

			if ( this.$wrapper.is( 'body' ) || this.options.hideOnWindowLoad ) {
				$( window ).on( 'load error', function() {
					_self.hide();
				} );
			}

			if ( this.options.listenOn ) {
				$( this.options.listenOn )
					.on( 'loading-overlay:show beforeSend.ic', function( e ) {
						e.stopPropagation();
						_self.show();
					} )
					.on( 'loading-overlay:hide complete.ic', function( e ) {
						e.stopPropagation();
						_self.hide();
					} );
			}

			this.$wrapper
				.on( 'loading-overlay:show beforeSend.ic', function( e ) {
					e.stopPropagation();
					_self.show();
				} )
				.on( 'loading-overlay:hide complete.ic', function( e ) {
					e.stopPropagation();
					_self.hide();
				} );

			return this;
		},

		show: function() {
			this.build();

			this.position = this.$wrapper.css( 'position' ).toLowerCase();
			if ( this.position != 'relative' || this.position != 'absolute' || this.position != 'fixed' ) {
				this.$wrapper.css( {
					position: 'relative'
				} );
			}
			this.$wrapper.addClass( 'loading-overlay-showing' );
		},

		hide: function() {
			var _self = this;

			this.$wrapper.removeClass( 'loading-overlay-showing' );
			setTimeout( function() {
				if ( this.position != 'relative' || this.position != 'absolute' || this.position != 'fixed' ) {
					_self.$wrapper.css( { position: '' } );
				}
			}, 500 );
		},

		matchProperties: function() {
			var i,
				l,
				properties;

			properties = [
				'backgroundColor',
				'borderRadius'
			];

			l = properties.length;

			for ( i = 0; i < l; i++ ) {
				var obj = {};
				obj[properties[i]] = this.$wrapper.css( properties[i] );

				$.extend( this.options.css, obj );
			}
		},

		getLoaderClass: function( backgroundColor ) {
			if ( !backgroundColor || backgroundColor === 'transparent' || backgroundColor === 'inherit' ) {
				return 'black';
			}

			var hexColor,
				r,
				g,
				b,
				yiq;

			var colorToHex = function( color ) {
				var hex,
					rgb;

				if ( color.indexOf( '#' ) > - 1 ) {
					hex = color.replace( '#', '' );
				} else {
					rgb = color.match( /\d+/g );
					hex = ( '0' + parseInt( rgb[0], 10 ).toString( 16 ) ).slice( -2 ) + ( '0' + parseInt( rgb[1], 10 ).toString( 16 ) ).slice( -2 ) + ( '0' + parseInt( rgb[2], 10 ).toString( 16 ) ).slice( -2 );
				}

				if ( hex.length === 3 ) {
					hex = hex + hex;
				}

				return hex;
			};

			hexColor = colorToHex( backgroundColor );

			r = parseInt( hexColor.substr( 0, 2 ), 16 );
			g = parseInt( hexColor.substr( 2, 2 ), 16 );
			b = parseInt( hexColor.substr( 4, 2 ), 16 );
			yiq = ( ( r * 299 ) + ( g * 587 ) + ( b * 114 ) ) / 1000;

			return ( yiq >= 128 ) ? 'black' : 'white';
		}

	};

	// expose to scope
	$.extend( theme, {
		LoadingOverlay: LoadingOverlay
	} );

	// expose as a jquery plugin
	$.fn.loadingOverlay = function( opts ) {
		return this.each( function() {
			var $this = $( this );

			var loadingOverlay = $this.data( 'loadingOverlay' );
			if ( loadingOverlay ) {
				return loadingOverlay;
			} else {
				var options = opts || $this.data( 'loading-overlay-options' ) || {};
				return new LoadingOverlay( $this, options );
			}
		} );
	}

	// auto init
	//$( function () {
	$( 'body.loading-overlay-showing, [data-loading-overlay]' ).loadingOverlay();
	//} );

} ).apply( this, [window.theme, jQuery] );