TwentyNineteen_SVG_Icons

22<?php23class TwentyNineteen_SVG_Icons {24 25	/**26	 * Gets the SVG code for a given icon.27	 *28	 * @param string $group The group of icons ('ui' or 'social').29	 * @param string $icon  The specific icon to retrieve.30	 * @param int    $size  The desired width and height for the SVG icon.31	 * @return string|null SVG code for the icon, or null if not found.32	 */33	public static function get_svg( $group, $icon, $size ) {34		if ( 'ui' === $group ) {35			$arr = self::$ui_icons;36		} elseif ( 'social' === $group ) {37			$arr = self::$social_icons;38		} else {39			$arr = array();40		}41		if ( array_key_exists( $icon, $arr ) ) {42			$repl = sprintf( '<svg class="svg-icon" width="%d" height="%d" aria-hidden="true" role="img" focusable="false" ', $size, $size );43			$svg  = preg_replace( '/^<svg /', $repl, trim( $arr[ $icon ] ) ); // Add extra attributes to SVG code.44			$svg  = preg_replace( "/([\n\t]+)/", ' ', $svg ); // Remove newlines & tabs.45			$svg  = preg_replace( '/>\s*</', '><', $svg );    // Remove whitespace between SVG tags.46			return $svg;47		}48		return null;49	}50 51	/**52	 * Detects the social network from a URL and returns the SVG code for its icon.53	 *54	 * @param string $uri  The URL of the social network link.55	 * @param int    $size The desired width and height for the SVG icon.56	 * @return string|null SVG code for the social link icon, or null if not found.57	 */58	public static function get_social_link_svg( $uri, $size ) {59		static $regex_map; // Only compute regex map once, for performance.60		if ( ! isset( $regex_map ) ) {61			$regex_map = array();62			$map       = &self::$social_icons_map; // Use reference instead of copy, to save memory.63			foreach ( array_keys( self::$social_icons ) as $icon ) {64				$domains            = array_key_exists( $icon, $map ) ? $map[ $icon ] : array( sprintf( '%s.com', $icon ) );65				$domains            = array_map( 'trim', $domains ); // Remove leading/trailing spaces, to prevent regex from failing to match.66				$domains            = array_map( 'preg_quote', $domains );67				$regex_map[ $icon ] = sprintf( '/(%s)/i', implode( '|', $domains ) );68			}69		}70		foreach ( $regex_map as $icon => $regex ) {71			if ( preg_match( $regex, $uri ) ) {72				return self::get_svg( 'social', $icon, $size );73			}74		}75		return null;76	}77 78	/**79	 * User Interface icons – svg sources.80	 *81	 * @var array82	 */83	public static $ui_icons = array(84		'link'                     => /* material-design – link */ '85<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">86    <path d="M0 0h24v24H0z" fill="none"></path>87    <path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path>88</svg>',89 90		'watch'                    => /* material-design – watch-later */ '91<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">92    <defs>93        <path id="a" d="M0 0h24v24H0V0z"></path>94    </defs>95    <clipPath id="b">96        <use xlink:href="#a" overflow="visible"></use>97    </clipPath>98    <path clip-path="url(#b)" d="M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10 10-4.5 10-10S17.5 2 12 2zm4.2 14.2L11 13V7h1.5v5.2l4.5 2.7-.8 1.3z"></path>99</svg>',100 101		'archive'                  => /* material-design – folder */ '102<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">