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/** * Font Control * * @author Paul Kashtanoff <paul@byonepress.com> * @copyright (c) 2013-2014, OnePress Ltd * * @package factory-forms * @since 3.1.0 */ ;( function( $ ){ $.widget( "factoryBootstrap467.fontControl", { _create: function() { this.$element = this.element; this.$family = this.$element.find(".factory-family-wrap select"); this.$googleFontData = this.$element.find(".factory-google-font-data"); this.fontSelectorName = this.$family.attr('name'); this.googleFontsOptions = { frameName: this.element.data('google-fonts-frame-name') }; if ( !this.googleFontsOptions.frameName ) this.googleFontsOptions.frameName = 'preview'; this._initUI(); this._bindEvents(); }, _initUI: function() { this.$family.chosen(); }, _bindEvents: function() { var self = this; this.$family.change(function( data ){ var $option = self._getCurrentOption(); var isGoogleFont = $option.data('google-font'); if ( isGoogleFont ) { var family = $option.data('family'); var variants = $option.data('variants').split(','); var subsets = $option.data('subsets').split(','); self._loadGoogleFont( family, variants, subsets ); } else { self.$googleFontData.val(""); } }); }, _getCurrentOption: function() { var value = this.$family.val(); return this._getOptionByValue( value ); }, _getOptionByValue: function( value ) { var $option = this.$family.find("option[value='" + value + "']"); return $option; }, _loadGoogleFont: function( family, variants, subsets ) { // these filters allow extrenal apps to manage which variants // and subsets have to be laoded and which should be skipped var variants = this._filterGoogleFontVariantsBeforeLoading( family, variants, subsets ); var subsets = this._filterGoogleFontSubsetsBeforeLoading( family, variants, subsets ); this.$googleFontData.val(this._encode64(JSON.stringify({ name: family, styles: variants, subsets: subsets }))); // the target is a place (current window or an iframe) // where the font should be loaded var $target = this._getTargetToLoadGoogleFont(); // the id is used to prevent loading multiple // fonts for a single font control var linkId = this.fontSelectorName + "-font-loader"; // removes the previous link with the same id var $link = $target.find('#' + linkId); if ( $target.find('#' + linkId).length > 0 ) { $link.remove(); } // builds an URL for loading the font var url = 'http://fonts.googleapis.com/css'; if ( variants && variants.length ) family = family + ":" + variants.join(","); url = url + '?family=' + family; if ( subsets && subsets.length ) url = url + '&subset=' + subsets.join(","); $('<link id="' + linkId + '" rel="stylesheet" type="text/css" href="' + url + '" >').appendTo( $target ); }, /** * Calls external filters to modify the list of the google font variants to be loaded. * @since 3.2.8 */ _filterGoogleFontVariantsBeforeLoading: function( family, variants, subsets ) { var self = this; $(document).trigger('factory-filter-google-font-variants', [variants, self.$element, family, subsets]); return variants; }, /** * Calls external filters to modify the list of the google font subsets to be loaded. * @since 3.2.8 */ _filterGoogleFontSubsetsBeforeLoading: function( family, variants, subsets ) { var self = this; $(document).trigger('factory-filter-google-font-subsets', [subsets, self.$element, variants, subsets]); return subsets; }, /** * Returns a target element where the google font link element should be appended. * @since 3.2.8 */ _getTargetToLoadGoogleFont: function() { var frameName = this.googleFontsOptions.frameName; var $target = $('head'); if ( frameName ) { var $frame = $('iframe[name="' + frameName + '"]'); if ( $frame.length === 0 ) return console.error('The preview container not found.'); $target = $frame.contents().find('head'); } return $target; }, _base64KeyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", _encode64: function(input) { input = escape(input); var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0; do { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; } output = output + this._base64KeyStr.charAt(enc1) + this._base64KeyStr.charAt(enc2) + this._base64KeyStr.charAt(enc3) + this._base64KeyStr.charAt(enc4); chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return output; } }); $(function(){ $.widget.bridge( "factoryBootstrap467_fontControl", $.factoryBootstrap467.fontControl ); $(".factory-bootstrap-467 .factory-font").factoryBootstrap467_fontControl({}); }); }( jQuery ) );
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