File: /storage/v12674/lcalansdale/public_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', false ) )
{
class aviaSVGImages extends aviaFramework\base\object_properties
{
/**
*
* @since 4.8.7
* @var aviaSVGImages
*/
static protected $_instance = null;
/**
* Cache loaded svg files content
*
* @since 4.8.7
* @var array
*/
protected $cache;
/**
* Cache loaded svg metadata content for aria
*
* @since 5.6.5
* @var array
*/
protected $aria_cache;
/**
* Holds the queried media library svg
*
* 'ID' => WP_Post
*
* @since 7.0
* @var array
*/
protected $library_cache;
/**
* Return the instance of this class
*
* @since 4.8.7
* @return aviaSVGImages
*/
static public function instance()
{
if( is_null( aviaSVGImages::$_instance ) )
{
aviaSVGImages::$_instance = new aviaSVGImages();
}
return aviaSVGImages::$_instance;
}
/**
* @since 4.8.7
*/
protected function __construct()
{
$this->cache = [];
$this->aria_cache = [];
$this->library_cache = null;
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 );
unset( $this->aria_cache );
unset( $this->library_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 set 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( false !== $this->get_raw_svg( $attachment_id, $url ) )
{
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 );
/**
* https://kriesi.at/support/topic/long-page-loading-ends-with-50x-due-to-false-svg-logo-url/
*
* @since 5.6.7
*/
curl_setopt( $curlSession, CURLOPT_CONNECTTIMEOUT, 1 );
curl_setopt( $curlSession, CURLOPT_TIMEOUT, 1 );
$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 );
}
/**
* Checks id svg is in cache and returns raw <svg> element
*
* IMPORTANT: Make sure to call exists_svg_file() before calling this function
*
* @since 7.0
* @param int $attachment_id
* @param string $url
* @return bool|string
*/
protected function get_raw_svg( $attachment_id, $url )
{
$key = is_numeric( $attachment_id ) && $attachment_id > 0 ? $attachment_id : $url;
if( isset( $this->cache[ $key ] ) )
{
return $this->cache[ $key ];
}
return false;
}
/**
* Returns the html content of a svg file
*
* @since 4.8.7
* @since 5.6.5 added $fallback_title
* @since 7.0 changed get_html to get_logo_html
* @param int $attachment_id
* @param string $url
* @param string $preserve_aspect_ratio
* @param string $fallback_title
* @return string
*/
public function get_logo_html( $attachment_id, $url, $preserve_aspect_ratio = '', $fallback_title = '' )
{
$svg_original = $this->get_raw_svg( $attachment_id, $url );
if( empty( $svg_original ) )
{
return '';
}
$svg = $this->set_preserveAspectRatio( $svg_original, $preserve_aspect_ratio );
if( is_numeric( $attachment_id ) && $attachment_id > 0 )
{
$this->set_aria_attributes_logo( $svg, $attachment_id, $fallback_title );
}
/**
* @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
*/
return apply_filters( 'avf_svg_images_get_html', $svg, $attachment_id, $url, $preserve_aspect_ratio, $this, $svg_original );
}
/**
* Returns the inline svg tag for an svg icon
*
* @since 7.0
* @param string|int $key attachment ID | filename
* @param array $icon_info
* @param string $icon_char
* @param string $font
* @param array $additional_atts
* @return string
*/
public function get_icon_html( $key, array $icon_info, $icon_char, $font, array $additional_atts = [] )
{
if( is_numeric( $key ) && $key > 0 )
{
$file = '';
$attachment_id = $key;
}
else
{
$file = $key;
$attachment_id = 0;
}
if( ! $this->exists_svg_file( $file, $attachment_id ) )
{
return '';
}
$svg_original = $this->get_raw_svg( $attachment_id, $file );
if( $attachment_id > 0 )
{
$aria_atts = $this->get_aria_attributes( $attachment_id, $file, '' );
}
else
{
$aria_atts = [
'title' => $icon_info['title'],
'desc' => $icon_info['description'],
'alt' => $icon_info['alt']
];
}
$aria_atts['role'] = 'graphics-symbol';
$isColoredSVG = $this->isColoredSVGWithGradients( $svg_original );
if( $isColoredSVG )
{
$aria_atts['is-colored'] = 'true';
}
$aria_atts = array_merge( $aria_atts, $additional_atts );
$preserve_aspect_ratio = $this->get_alignment( 'center center' );
$preserve_aspect_ratio .= ' ' . $this->get_display_mode();
$svg = $this->set_preserveAspectRatio( $svg_original, $preserve_aspect_ratio );
$svg = $this->set_svg_markup( $svg, $aria_atts );
/**
* Filter to return svg in <img src=""> tag - could be needed for colored icons with same named classes
* in multiple svg
*
* @since 7.0
* @param boolean $svg_as_img
* @param string $icon_char
* @param string $font
* @param boolean $isColoredSVG
* @param string $svg
* @return boolean
*/
if( false !== apply_filters( 'avf_svg_images_icon_as_img', false, $icon_char, $font, $isColoredSVG, $svg ) )
{
if( is_numeric( $key ) && $key > 0 )
{
$url = wp_get_attachment_url( $key );
}
else
{
$url = $this->local_to_url( $key );
}
if( false !== $url )
{
$atts = [];
if( isset( $aria_atts['alt'] ) )
{
$atts[] = 'alt="' . esc_attr( $aria_atts['alt'] ) . '"';
}
if( isset( $aria_atts['title'] ) )
{
$atts[] = 'title="' . esc_attr( $aria_atts['title'] ) . '"';
}
$atts = implode( ' ', $atts );
$svg = "<img src='{$url}' is-svg-img='true' {$atts}>";
}
}
/**
* @since 7.0
* @param string $svg
* @param string $svg_original
* @param string|int $key
* @param array $icon_info
* @param string $icon_char
* @param string $font
* @param boolean $isColoredSVG
* @return string
*/
return apply_filters( 'avf_svg_images_get_icon_html', $svg, $svg_original, $key, $icon_info, $icon_char, $font, $isColoredSVG );
}
/**
* Convert a local filename to a URL. File must be inside child theme or parent theme folder
*
* @since 7.0
* @param string $file
* @return string|false
*/
protected function local_to_url( $file )
{
static $wp_dir = '';
static $wp_url = '';
if( empty( $wp_dir ) )
{
$wp_dir = str_replace( '\\', '/', WP_CONTENT_DIR );
$wp_url = str_replace( '\\', '/', WP_CONTENT_URL );
}
$check_file = str_replace( '\\', '/', $file );
$url = false;
if( false !== strpos( $check_file, $wp_dir ) )
{
$url = str_replace( $wp_dir, $wp_url, $check_file );
}
/**
* @since 7.0
* @param string|false $url
* @param string $file
* @return string|false
*/
return apply_filters( 'avf_svg_images_local_to_url', $url, $file );
}
/**
* Reads attachment metadata for uploaded svg file, fills an array with these values or with $fallback_title,
* adds to local cache and retuns it
*
* @since 7.0
* @param int|string $attachment_id
* @param string $fallback_title
* @return array
*/
protected function get_aria_attributes( $attachment_id, $url = '', $fallback_title = '' )
{
$key = ! is_numeric( $attachment_id ) || $attachment_id <= 0 ? $url : $attachment_id;
if( isset( $this->aria_cache[ $key ] ) )
{
return $this->aria_cache[ $key ];
}
$default = [
'role' => 'graphics-document',
'title' => '',
'desc' => '',
'alt' => ''
];
if( ! is_numeric( $key ) )
{
$default['title'] = $fallback_title;
$default['desc'] = __( 'SVG Image: ', 'avia_framework' ) . $fallback_title;
$default['alt'] = $default['desc'];
$this->aria_cache[ $key ] = $default;
return $default;
}
$title = get_the_title( $attachment_id );
$alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );
$desc = get_the_content( null, false, $attachment_id );
if( ! empty( $title ) )
{
$t = $title;
}
else if( ! empty( $alt ) )
{
$t = $alt;
}
else if( ! empty( $fallback_title ) )
{
$t = $fallback_title;
}
else
{
$t = __( 'SVG Image', 'avia_framework' );
}
$default['title'] = $t;
if( ! empty( $alt ) )
{
$default['alt'] = $alt;
}
if( ! empty( $desc ) )
{
$default['desc'] = $desc;
}
$this->aria_cache[ $key ] = $default;
return $default;
}
/**
* @since 4.8.7
* @param int $attachment_id
* @return bool|array
*/
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->extract_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 returned.
*
* @since 4.8.7
* @param string $svg
* @param string $preserveAspectRatio
* @return string
*/
protected function set_preserveAspectRatio( $svg, $preserveAspectRatio = '' )
{
$matches = $this->extract_svg_attributes( $svg );
if( ! is_array( $matches ) )
{
return $svg;
}
$attributesString = $matches[1][0];
$start = $matches[1][1];
$len = strlen( $attributesString );
$match_preserve = array();
preg_match( '#preserveAspectRatio=(["\'])([a-zA-Z ]*)(["\'])#im', $attributesString, $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 = $attributesString . ' ' . $ratio;
}
else
{
$new_atts = str_replace( $match_preserve[0][0], $ratio, $attributesString );
}
$new_svg = substr_replace( $svg, $new_atts, $start, $len );
return $new_svg;
}
/**
* Adds attributes to svg - including aria support
*
* If <title> exists as first child in <svg> or 'aria-label' exists we assume that markup is correct for aria support
*
* @link https://www.unimelb.edu.au/accessibility/techniques/accessible-svgs
* @since 7.0
* @param string $svg
* @param array $aria_atts
* @return string
*/
protected function set_svg_markup( $svg, array $aria_atts )
{
static $count = 0;
$svg_matches = $this->extract_svg_attributes( $svg );
if( ! is_array( $svg_matches ) )
{
return $svg;
}
$count++;
$remove_atts_keys = [];
$add_atts = [];
$add_tags = [];
$svg_string = $svg_matches[0][0];
$svg_len = strlen( $svg_string );
$after_svg_tag = substr( $svg, $svg_len );
$attributesString = $svg_matches[1][0];
// split attributes include attributes like aria-*, single and double quotes
$attrMatches = [];
$pattern = '/(\w[\w-]*)\s*=\s*["\']([^"\']*)["\']/';
preg_match_all( $pattern, $attributesString, $attrMatches );
$svg_atts_strings = $attrMatches[0];
$svg_atts_keys = $attrMatches[1];
/**
* Add title and desc
*/
try
{
// Correct structure - for older browsers
if( in_array( 'aria-label', $svg_atts_keys ) )
{
throw new Exception();
}
if( 0 === strpos( trim( $after_svg_tag ), '<title' ) )
{
throw new Exception();
}
if( $aria_atts['title'] )
{
$id_title = "av-svg-title-{$count}";
$add_tags[] = "<title id='{$id_title}'>" . esc_html( $aria_atts['title'] ) . '</title>';
$add_atts[] = "aria-labelledby='{$id_title}'";
$remove_atts_keys[] = 'aria-labelledby';
if( $aria_atts['desc'] )
{
$id_desc = "av-svg-desc-{$count}";
$add_tags[] = "<desc id='{$id_desc}'>" . esc_html( $aria_atts['desc'] ) . '</desc>';
$add_atts[] = "aria-describedby='{$id_desc}'";
$remove_atts_keys[] = 'aria-describedby';
}
}
}
catch( Exception $ex )
{
}
if( in_array( 'role', $svg_atts_keys ) )
{
unset( $aria_atts['role'] );
}
if( in_array( 'is-colored', $svg_atts_keys ) )
{
unset( $aria_atts['is-colored'] );
}
unset( $aria_atts['title'] );
unset( $aria_atts['desc'] );
unset( $aria_atts['alt'] ); // not needed for svg
foreach( $aria_atts as $attr => $value )
{
$remove_atts_keys[] = $attr;
}
// insert tags
$tag_string = implode( "\n", $add_tags );
if( ! empty( $tag_string ) )
{
$svg = substr_replace( $svg, "\n" . $tag_string, $svg_len, 0 );
}
$svg_string_new = $svg_string;
// remove not needed svg attributes
foreach( $remove_atts_keys as $remove_key )
{
// we need to scan array to eliminate double same name attributes
foreach( $svg_atts_keys as $index => $value )
{
if( $value == $remove_key )
{
$svg_string_new = str_replace( $svg_atts_strings[ $index ], '', $svg_string_new );
}
}
}
foreach( $aria_atts as $attr => $value )
{
$add_atts[] = $attr . '="' . esc_attr( $value ) . '"';
}
// add new attributes
$attr_string = implode( ' ', $add_atts );
if( ! empty( $attr_string ) )
{
$svg_new_insert = strlen( $svg_string_new ) - 1;
$svg_string_new = substr_replace( $svg_string_new, ' ' . $attr_string, $svg_new_insert, 0 );
}
$new_svg = substr_replace( $svg, $svg_string_new, 0, $svg_len );
return $new_svg;
}
/**
* Add aria attributes to svg container for logo (only added when logo is in media gallery)
* https://accessibilityinsights.io/info-examples/web/svg-img-alt/
* https://dequeuniversity.com/rules/axe/4.1/svg-img-alt
*
* @since 5.6.5
* @param string $svg
* @param array $atts
*/
protected function set_aria_attributes_logo( &$svg, $attachment_id, $fallback_title = '' )
{
$pos = strpos( $svg, '<svg ' );
if( false === $pos )
{
return;
}
/*
*
* @since 5.6.5
* @param boolean $ignore
* @param string $svg
* @param int $attachment_id
* @return boolean
*/
if( false !== apply_filters( 'avf_ignore_svg_aria_attributes', false, $svg, $attachment_id ) )
{
return;
}
if( ! is_numeric( $attachment_id ) || $attachment_id <= 0 )
{
return;
}
// if( ! isset( $this->aria_cache[ $attachment_id ] ) )
// {
// $this->aria_cache[ $attachment_id ]['role'] = 'graphics-document';
//
// $title = get_the_title( $attachment_id );
// $alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );
//
// if( ! empty( $title ) )
// {
// $t = $title;
// }
// else if( ! empty( $alt ) )
// {
// $t = $alt;
// }
// else if( ! empty( $fallback_title ) )
// {
// $t = $fallback_title;
// }
// else
// {
// $t = __( 'SVG Image', 'avia_framework' );
// }
//
// $this->aria_cache[ $attachment_id ]['title'] = esc_attr( $t );
//
// if( ! empty( $alt ) )
// {
// $this->aria_cache[ $attachment_id ]['alt'] = esc_attr( $alt );
// }
// }
//
// $atts = $this->aria_cache[ $attachment_id ];
$atts = $this->get_aria_attributes( $attachment_id, '', $fallback_title );
/**
* @since 5.6.5
* @param array $atts
* @param int $attachment_id
* @param string $svg
*/
$atts = apply_filters( 'avf_set_svg_aria_attributes', $atts, $attachment_id, $fallback_title );
$matches = $this->extract_svg_attributes( $svg );
if( is_array( $matches ) )
{
$svg_atts = $matches[1][0];
foreach( $atts as $key => $value )
{
if( false === stripos( $svg_atts, " {$key}=" ) )
{
continue;
}
if( 0 === stripos( $svg_atts, "{$key}=" ) )
{
continue;
}
unset( $atts[ $key ] );
}
}
$aria = '';
foreach( $atts as $key => $value )
{
$aria .= $key . '="' . $value . '" ';
}
$svg = substr_replace( $svg, " {$aria} ", $pos + 4, 0 );
}
/**
* Split first svg and return the preg_match array and a modified svg string
*
* @since 4.8.8
* @param string $svg
* @return array|false
*/
protected function extract_svg_attributes( &$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;
}
/**
* Checks if we have a colored or monochrome svg
*
* @since 7.0
* @param string $svgContent
* @return boolean
* @throws Exception
*/
public function isColoredSVGWithGradients( $svgContent )
{
// supress internal xml errors
libxml_use_internal_errors( true );
// Laden des SVG-Inhalts als XML
$xml = simplexml_load_string( $svgContent );
if( ! $xml )
{
libxml_clear_errors();
return false;
}
$namespaces = $xml->getNamespaces( true );
$namespaceUri = $namespaces[''] ?? 'http://www.w3.org/2000/svg';
$xml->registerXPathNamespace( 'svg', $namespaceUri );
$colors = [];
// 1. Prüfen auf `fill` und `stroke` Attribute
foreach( $xml->xpath( '//*[@fill] | //*[@stroke]' ) as $element)
{
if( isset( $element['fill'] ) && (string)$element['fill'] !== 'none' )
{
$colors[] = (string)$element['fill'];
}
if( isset($element['stroke'] ) && (string)$element['stroke'] !== 'none' )
{
$colors[] = (string)$element['stroke'];
}
}
// 2. Prüfen auf Farbverläufe (`<linearGradient>` und `<radialGradient>`)
foreach( $xml->xpath( '//svg:linearGradient | //svg:radialGradient' ) as $gradient )
{
$stops = $gradient->xpath('.//svg:stop');
if( $stops === false )
{
continue;
}
foreach( $stops as $stop )
{
if( isset( $stop['stop-color'] ) && (string)$stop['stop-color'] !== 'none' )
{
$colors[] = (string)$stop['stop-color'];
}
}
}
// 3. Prüfen auf `style`-Attribute
foreach( $xml->xpath('//*[@style]') as $element )
{
$style = (string)$element['style'];
if( preg_match_all( '/(fill|stroke):\s*([^;]+)/', $style, $matches ) )
{
$colors = array_merge( $colors, $matches[2] );
}
}
// 4. Prüfen auf eingebettete CSS-Styles
foreach( $xml->xpath('//svg:style' ) as $styleBlock )
{
$styleContent = (string)$styleBlock;
if ( preg_match_all( '/(fill|stroke):\s*([^;]+)/', $styleContent, $matches ) )
{
$colors = array_merge( $colors, $matches[2] );
}
}
// Filterung der Farben: Entfernen von "none", leeren Werten und standardisierten Schwarz (#000000, black)
$filteredColors = array_filter( array_unique( $colors ), function ( $color )
{
$color = strtolower( $color );
return $color !== 'none' && $color !== '#000000' && $color !== 'black';
} );
libxml_clear_errors();
// 5. Rückgabe: Wenn es nach dem Filtern Farben gibt, ist das SVG farbig
return count( $filteredColors ) > 0;
}
/**
* Reads all svg from media library and stores the query result in $this->library_cache
*
* @since 7.0
* @return array[WP_Post]
*/
public function read_svg_from_media_library()
{
global $wpdb;
if( is_array( $this->library_cache ) )
{
return $this->library_cache;
}
$this->library_cache = [];
/**
* @since 7.0
* @param boolean $use_svg_from_media_library
* @return boolean
*/
if( true !== apply_filters( 'avf_use_svg_from_media_library', true ) )
{
return $this->library_cache;
}
$query = "
SELECT *
FROM {$wpdb->posts}
WHERE post_type = 'attachment'
AND post_mime_type = 'image/svg+xml'
AND post_status = 'inherit'
";
$svg_files_found = $wpdb->get_results( $query );
/**
* @since 7.0
* @param array $svg_files_found
* @return array
*/
$svg_files = apply_filters( 'avf_queried_svg_from_media_library', $svg_files_found );
if( ! empty( $svg_files ) )
{
foreach( $svg_files as $file )
{
$this->library_cache[ $file->ID ] = $file;
}
}
return $this->library_cache;
}
}
/**
* 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();
}