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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
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| Current Path : /var/www/web23/html/wp-content/themes/enfold/framework/php/ |
| Current File : //var/www/web23/html/wp-content/themes/enfold/framework/php/class-svg-images.php |
<?php
/**
* Base class to handle svg image support
*
*
* @since 4.8.7
* @added_by Günter
*/
if( ! defined( 'AVIA_FW' ) ) { exit( 'No direct script access allowed' ); }
if( ! class_exists( 'aviaSVGImages' ) )
{
class aviaSVGImages
{
/**
*
* @since 4.8.7
* @var aviaSVGImages
*/
static protected $_instance = null;
/**
* Cache loaded svg files content
*
* @since 4.8.7
* @var array
*/
protected $cache;
/**
* Return the instance of this class
*
* @since 4.8.7
* @return aviaSVGImages
*/
static public function instance()
{
if( is_null( aviaSVGImages::$_instance ) )
{
aviaSVGImages::$_instance = new aviaSVGImages();
}
return aviaSVGImages::$_instance;
}
/**
* @since 4.8.7
*/
protected function __construct()
{
$this->cache = array();
add_filter( 'upload_mimes', array( $this, 'handler_upload_mimes' ), 999 );
// WP 4.7.1 and 4.7.2 fix
add_filter( 'wp_check_filetype_and_ext', array( $this, 'handler_wp_fix_check_filetype_and_ext' ), 10, 4 );
}
/**
* @since 4.8.7
*/
public function __destruct()
{
unset( $this->cache );
}
/**
* Activate svg mime type.
* If a plugin activates it, we do not remove this setting.
*
* @since 4.8.7
* @param array $mimes
* @return array
*/
public function handler_upload_mimes( $mimes = array() )
{
/**
* Disallow upload of svg files for non admins
*
* @since 4.8.7
* @param boolean $allow_upload
* @return boolean true to allow upload
*/
$allow_upload = apply_filters( 'avf_upload_svg_images', current_user_can( 'manage_options' ) );
if( true === $allow_upload )
{
$mimes['svg'] = 'image/svg+xml';
$mimes['svgz'] = 'image/svg+xml';
}
return $mimes;
}
/**
* Mime Check fix for WP 4.7.1 / 4.7.2
* Issue was fixed in 4.7.3 core.
*
* @since 4.8.7
* @param array $checked
* @param string $file
* @param string $filename
* @param array $mimes
* @return array
*/
public function handler_wp_fix_check_filetype_and_ext( $checked, $file, $filename, $mimes )
{
global $wp_version;
if ( $wp_version !== '4.7.1' || $wp_version !== '4.7.2' )
{
return $checked;
}
$filetype = wp_check_filetype( $filename, $mimes );
return array(
'ext' => $filetype['ext'],
'type' => $filetype['type'],
'proper_filename' => $checked['proper_filename']
);
}
/**
* Check if a filename is a svg file
*
* @since 4.8.7
* @param string $filename
* @return boolean
*/
public function is_svg( $filename )
{
$mimes = array(
'svg' => 'image/svg+xml',
'svgz' => 'image/svg+xml'
);
$filetype = wp_check_filetype( $filename, $mimes );
return strpos( $filetype['ext'], 'svg' ) !== false;
}
/**
* Check if we have a svg file we can access and load into cache.
* If file is in media library we return the attachment_id.
* If not, we try to read the content of the file.
*
* @since 4.8.7
* @param string $url
* @param int $attachment_id 0 if file does not exist in media library
* @param string $filter_front 'filter' | 'raw'
* @return boolean
*/
public function exists_svg_file( $url, &$attachment_id, $filter_front = 'filter' )
{
$curlSession = false;
/**
* Supress to load svg inline - return anything !== false
* Keep in mind, that custom CSS will not target svg content !!
*
* @since 4.8.7.1
* @param boolean $no_inline
* @param string $url
* @param int $attachment_id
* @return boolean
*/
$no_inline = apply_filters( 'avf_no_inline_svg', false, $url, $attachment_id );
if( false !== $no_inline && 'filter' == $filter_front )
{
return false;
}
try
{
if( ! is_numeric( $attachment_id ) || $attachment_id <= 0 )
{
$attachment_id = Av_Responsive_Images()->attachment_url_to_postid( $url );
if( ! is_numeric( $attachment_id ) )
{
$attachment_id = 0;
}
}
if( $this->get_html( $attachment_id, $url, '', 'boolean' ) )
{
return true;
}
if( $attachment_id > 0 )
{
$filename = get_attached_file( $attachment_id );
if( false === $filename || ! $this->is_svg( $filename ) )
{
throw new Exception();
}
$svg = ( file_exists( $filename ) ) ? file_get_contents( $filename ) : false;
if( false === $svg )
{
throw new Exception();
}
$this->add_to_cache( $attachment_id, $svg );
}
else if( false !== $this->is_url( $url ) )
{
if( ! $this->is_svg( $url ) )
{
throw new Exception();
}
if( ! function_exists( 'curl_init' ) )
{
throw new Exception();
}
$curlSession = curl_init();
if( false === $curlSession )
{
throw new Exception();
}
curl_setopt( $curlSession, CURLOPT_URL, $url );
curl_setopt( $curlSession, CURLOPT_BINARYTRANSFER, true );
curl_setopt( $curlSession, CURLOPT_RETURNTRANSFER, true );
$svg = curl_exec( $curlSession );
curl_close( $curlSession );
$curlSession = false;
if( false === $svg )
{
throw new Exception();
}
$this->add_to_cache( $url, $svg );
}
else
{
if( ! $this->is_svg( $url ) )
{
throw new Exception();
}
// check if we can find the file in local file structure
$new_file = $url;
if( ! file_exists( $new_file ) )
{
$new_file = ABSPATH . ltrim( $url, '/\\' );
if( ! file_exists( $new_file ) )
{
$new_file = false;
}
}
if( false === $new_file )
{
throw new Exception();
}
$svg = file_get_contents( $new_file );
if( false === $svg )
{
throw new Exception();
}
$this->add_to_cache( $url, $svg );
}
}
catch( Exception $ex )
{
if( $curlSession !== false )
{
curl_close( $curlSession );
}
$attachment_id = 0;
return false;
}
return true;
}
/**
* Adds content of an svg to cache
*
* @since 4.8.7
* @param int $key
* @param string $svg_content
*/
protected function add_to_cache( $key, $svg_content )
{
$this->cache[ $key ] = trim( $svg_content );
}
/**
* Returns the html content of a svg file
* or a boolean value if we only want to check cache
*
* @since 4.8.7
* @param int $attachment_id
* @param string $url
* @param string $preserve_aspect_ratio
* @param string $return 'html' | 'boolean'
* @return string|boolean
*/
public function get_html( $attachment_id, $url, $preserve_aspect_ratio = '', $return = 'html' )
{
$key = is_numeric( $attachment_id ) && $attachment_id > 0 ? $attachment_id : $url;
if( ! isset( $this->cache[ $key ] ) )
{
return false;
}
if( 'boolean' == $return )
{
return true;
}
$svg_original = $this->cache[ $key ];
$svg = $this->set_preserveAspectRatio( $svg_original, $preserve_aspect_ratio );
/**
* @since 4.8.7
* @since 4.8.8 added $svg_original
* @param string $svg
* @param int $attachment_id
* @param string $url
* @param string $preserve_aspect_ratio
* @param aviaSVGImages $this
* @param string $svg_original
* @return string|false
*/
return apply_filters( 'avf_svg_images_get_html', $svg, $attachment_id, $url, $preserve_aspect_ratio, $this, $svg_original );
}
public function get_meta_data( $attachment_id )
{
if( ! $this->exists_svg_file( '', $attachment_id, 'raw' ) )
{
return false;
}
if( ! isset( $this->cache[ $attachment_id ] ) )
{
return false;
}
$svg = trim( $this->cache[ $attachment_id ] );
$matches = $this->split_svg_attributes( $svg );
if( ! is_array( $matches ) )
{
return false;
}
$atts = $matches[1][0];
$start = $matches[1][1];
$len = strlen( $atts );
$match_size = array();
preg_match( '#viewBox=(["\'])([a-zA-Z0-9 ]*)(["\'])#im', $atts, $match_size, PREG_OFFSET_CAPTURE );
// check if value remains unchanged
if( ! empty( $match_size ) && isset( $match_size[2] ) && isset( $match_size[2][0] ) )
{
return array( 'viewbox' => $match_size[2][0] );
}
return false;
}
/**
* Prepare svg with rendered $preserveAspectRatio.
* Checks for a svg tag and returns starting with first tag.
* If this check fails an empty string is retunred.
*
* @since 4.8.7
* @param string $svg
* @param string $preserveAspectRatio
* @return string
*/
protected function set_preserveAspectRatio( $svg, $preserveAspectRatio = '' )
{
$matches = $this->split_svg_attributes( $svg );
if( ! is_array( $matches ) )
{
return '';
}
$atts = $matches[1][0];
$start = $matches[1][1];
$len = strlen( $atts );
$match_preserve = array();
preg_match( '#preserveAspectRatio=(["\'])([a-zA-Z ]*)(["\'])#im', $atts, $match_preserve, PREG_OFFSET_CAPTURE );
// check if value remains unchanged
if( ! empty( $match_preserve ) && isset( $match_preserve[2] ) && isset( $match_preserve[2][0] ) && $match_preserve[2][0] == $preserveAspectRatio )
{
return $svg;
}
// no preserveAspectRatio needed
if( empty( $match_preserve ) && empty( $preserveAspectRatio ) )
{
return $svg;
}
$ratio = ! empty( $preserveAspectRatio ) ? 'preserveAspectRatio="' . $preserveAspectRatio . '"' : '';
if( empty( $match_preserve ) )
{
$new_atts = $atts . ' ' . $ratio;
}
else
{
$new_atts = str_replace( $match_preserve[0][0], $ratio, $atts );
}
$new_svg = substr_replace( $svg, $new_atts, $start, $len );
return $new_svg;
}
/**
* Split first svg and return the preg_match array and a modified svg string
*
* @since 4.8.8
* @param string $svg
* @return array|false
*/
protected function split_svg_attributes( &$svg )
{
$svg = trim( $svg );
$pos = strpos( $svg, '<svg ' );
if( false === $pos )
{
return false;
}
// remove everything before first svg tag
if( $pos > 0 )
{
$svg = substr( $svg, $pos );
}
/**
* extract attributes of first svg - splitting tag in multipe lines is allowed
*
* https://kevin.deldycke.com/2007/03/ultimate-regular-expression-for-html-tag-parsing-with-php/
*/
$regex = "/<\/?\w+((\s+(\w|\w[\w-]*\w)(\s*=\s*(?:\".*?\"|'.*?'|[^'\">\s]+))?)+\s*|\s*)\/?>/i";
$matches = array();
if( ! preg_match( $regex, $svg, $matches, PREG_OFFSET_CAPTURE ) )
{
return false;
}
if( ! isset( $matches[1] ) )
{
return false;
}
return $matches;
}
/**
* Returns the alignment of the svg
*
* @since 4.8.7
* @param string $align
* @return string
*/
public function get_alignment( $align = 'center center' )
{
switch( $align )
{
case 'left top':
$att = 'xMinYMin';
break;
case 'left center':
$att = 'xMinYMid';
break;
case 'left bottom':
$att = 'xMinYMax';
break;
case 'center top':
$att = 'xMidYMin';
break;
case 'center center':
$att = 'xMidYMid';
break;
case 'center bottom':
$att = 'xMidYMax';
break;
case 'right top':
$att = 'xMaxYMin';
break;
case 'right center':
$att = 'xMaxYMid';
break;
case 'right bottom':
$att = 'xMaxYMax';
break;
case 'none':
$att = 'none';
break;
default:
$att = 'xMidYMid';
break;
}
return $att;
}
/**
* Get attribute to slice or scale image
*
* @since 4.8.7
* @param string $behaviour 'slice' | 'meet'
* @return string
*/
public function get_display_mode( $behaviour = 'meet' )
{
switch( $behaviour )
{
case 'slice':
$att = 'slice';
break;
case 'meet':
default:
$att = 'meet';
break;
}
return $att;
}
/**
* Return the preserveAspectRatio attribute value according to header settings
*
* @since 4.8.7
* @return string
*/
public function get_header_logo_aspect_ratio()
{
$header_pos = avia_get_option( 'header_layout' );
$preserve = '';
if( false !== strpos( $header_pos, 'logo_left' ) )
{
$preserve = $this->get_alignment( 'left center');
}
else if( false !== strpos( $header_pos, 'logo_right' ) )
{
$preserve = $this->get_alignment( 'right center');
}
else if( false !== strpos( $header_pos, 'logo_center' ) )
{
$preserve = $this->get_alignment( 'center center');
}
if( ! empty( $preserve ) )
{
$preserve .= ' ' . $this->get_display_mode();
}
/**
*
* @since 4.8.7
* @param string $preserve
* @param string $header_pos
* @return string
*/
return apply_filters( 'avf_svg_images_header_logo_aspect_ratio', $preserve, $header_pos );
}
/**
* Checks is a string starts with http://, https:// or localhost/
*
* @since 4.8.7
* @param string $test_url
* @return boolean
*/
protected function is_url( $test_url )
{
if( false !== stripos( $test_url, 'http://' ) || false !== stripos( $test_url, 'https://' ) || false !== stripos( $test_url, 'localhost/' ) )
{
return true;
}
return false;
}
}
/**
* Returns the main instance of aviaSVGImages to prevent the need to use globals.
*
* @since 4.8.7
* @return aviaSVGImages
*/
function avia_SVG()
{
return aviaSVGImages::instance();
}
// activate class
avia_SVG();
}
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