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Edit File: themify-fontello-icon-picker.php

<?php
/**
 * Fontello icon font
 * @link http://fontello.com/
 */
class Themify_Icon_Picker_Fontello extends Themify_Icon_Picker_Font {

function get_id() {
		return 'fontello';
	}

function get_label() {
		return __( 'Fontello', 'themify' );
	}

/**
	 * Check if the icon name belongs to the Fontello icon font
	 *
	 * @return bool
	 */
	function is_valid_icon( $name ) {
		if( substr( $name, 0, 5 ) === 'icon-' ) {
			return true;
		}

return false;
	}

function get_classname( $icon ) {
		return $icon;
	}

/**
	 * Get a list of available icons from the config.json file provided by Fontello
	 *
	 * @return array
	 */
	function get_icons() {
		$icons = array();
		$config = themify_fontello_get_config();
		if( $config ) {
			if( ! empty( $config['glyphs'] ) ) {
				foreach( $config['glyphs'] as $glyph ) {

/* custom icons uploaded but not selected are still included in the list; skip over those. */
					if( isset( $glyph['src'] ) && $glyph['src'] === 'custom_icons' && $glyph['selected'] == false ) {
						continue;
					}

$icons[ 'icon-' . $glyph['css'] ] = $glyph['css'];
				}
			}
		}
		return array(
			array(
				'key' => 'custom',
				'label' => __( 'Icons', 'themify' ),
				'icons' => $icons
			),
		);
	}

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