<?php
function wpcf7_add_form_tag( $tag, $func, $features = '' ) {
$manager = WPCF7_FormTagsManager::get_instance();
return $manager->add( $tag, $func, $features );
}
function wpcf7_remove_form_tag( $tag ) {
$manager = WPCF7_FormTagsManager::get_instance();
return $manager->remove( $tag );
}
function wpcf7_replace_all_form_tags( $content ) {
$manager = WPCF7_FormTagsManager::get_instance();
return $manager->replace_all( $content );
}
function wpcf7_scan_form_tags( $cond = null ) {
$contact_form = WPCF7_ContactForm::get_current();
if ( $contact_form ) {
return $contact_form->scan_form_tags( $cond );
}
return array();
}
function wpcf7_form_tag_supports( $tag, $feature ) {
$manager = WPCF7_FormTagsManager::get_instance();
return $manager->tag_type_supports( $tag, $feature );
}
class WPCF7_FormTagsManager {
private static $instance;
private $tag_types = array();
private $scanned_tags = null; // Tags scanned at the last time of scan()
private function __construct() {}
public static function get_instance() {
if ( empty( self::$instance ) ) {
self::$instance = new self;
}
return self::$instance;
}
public function get_scanned_tags() {
return $this->scanned_tags;
}
public function add( $tag, $func, $features = '' ) {
if ( ! is_callable( $func ) ) {
return;
}
if ( true === $features ) { // for back-compat
$features = array( 'name-attr' => true );
}
$features = wp_parse_args( $features, array() );
$tags = array_filter( array_unique( (array) $tag ) );
foreach ( $tags as $tag ) {
$tag = $this->sanitize_tag_type( $tag );
if ( ! $this->tag_type_exists( $tag ) ) {
$this->tag_types[$tag] = array(
'function' => $func,
'features' => $features,
);
}
}
}
public function tag_type_exists( $tag ) {
return isset( $this->tag_types[$tag] );
}
public function tag_type_supports( $tag, $feature ) {
$feature = array_filter( (array) $feature );
if ( isset( $this->tag_types[$tag]['features'] ) ) {
return (bool) array_intersect(
array_keys( array_filter( $this->tag_types[$tag]['features'] ) ),
$feature
);
}
return false;
}
public function collect_tag_types( $feature = null, $invert = false ) {
$tag_types = array_keys( $this->tag_types );
if ( empty( $feature ) ) {
return $tag_types;
}
$output = array();
foreach ( $tag_types as $tag ) {
if ( ! $invert && $this->tag_type_supports( $tag, $feature )
|| $invert && ! $this->tag_type_supports( $tag, $feature ) ) {
$output[] = $tag;
}
}
return $output;
}
private function sanitize_tag_type( $tag ) {
$tag = preg_replace( '/[^a-zA-Z0-9_*]+/', '_', $tag );
$tag = rtrim( $tag, '_' );
$tag = strtolower( $tag );
return $tag;
}
public function remove( $tag ) {
unset( $this->tag_types[$tag] );
}
public function normalize( $content ) {
if ( empty( $this->tag_types ) ) {
return $content;
}
$content = preg_replace_callback(
'/' . $this->tag_regex() . '/s',
array( $this, 'normalize_callback' ),
$content );
return $content;
}
private function normalize_callback( $m ) {
// allow [[foo]] syntax for escaping a tag
if ( $m[1] == '['
and $m[6] == ']' ) {
return $m[0];
}
$tag = $m[2];
$attr = trim( preg_replace( '/[\r\n\t ]+/', ' ', $m[3] ) );
$attr = strtr( $attr, array( '<' => '<', '>' => '>' ) );
$content = trim( $m[5] );
$content = str_replace( "\n", '<WPPreserveNewline />', $content );
$result = $m[1] . '[' . $tag
. ( $attr ? ' ' . $attr : '' )
. ( $m[4] ? ' ' . $m[4] : '' )
. ']'
. ( $content ? $content . '[/' . $tag . ']' : '' )
. $m[6];
return $result;
}
public function replace_all( $content ) {
return $this->scan( $content, true );
}
public function scan( $content, $replace = false ) {
$this->scanned_tags = array();
if ( empty( $this->tag_types ) ) {
if ( $replace ) {
return $content;
} else {
return $this->scanned_tags;
}
}
if ( $replace ) {
$content = preg_replace_callback(
'/' . $this->tag_regex() . '/s',
array( $this, 'replace_callback' ),
$content
);
return $content;
} else {
preg_replace_callback(
'/' . $this->tag_regex() . '/s',
array( $this, 'scan_callback' ),
$content
);
return $this->scanned_tags;
}
}
public function filter( $input, $cond ) {
if ( is_array( $input ) ) {
$tags = $input;
} elseif ( is_string( $input ) ) {
$tags = $this->scan( $input );
} else {
$tags = $this->scanned_tags;
}
if ( empty( $tags ) ) {
return array();
}
$cond = wp_parse_args( $cond, array(
'type' => array(),
'name' => array(),
'feature' => '',
) );
$type = array_filter( (array) $cond['type'] );
$name = array_filter( (array) $cond['name'] );
$feature = is_string( $cond['feature'] ) ? trim( $cond['feature'] ) : '';
if ( '!' == substr( $feature, 0, 1 ) ) {
$feature_negative = true;
$feature = trim( substr( $feature, 1 ) );
} else {
$feature_negative = false;
}
$output = array();
foreach ( $tags as $tag ) {
$tag = new WPCF7_FormTag( $tag );
if ( $type and ! in_array( $tag->type, $type, true ) ) {
continue;
}
if ( $name and ! in_array( $tag->name, $name, true ) ) {
continue;
}
if ( $feature ) {
if ( ! $this->tag_type_supports( $tag->type, $feature )
and ! $feature_negative ) {
continue;
} elseif ( $this->tag_type_supports( $tag->type, $feature )
and $feature_negative ) {
continue;
}
}
$output[] = $tag;
}
return $output;
}
private function tag_regex() {
$tagnames = array_keys( $this->tag_types );
$tagregexp = implode( '|', array_map( 'preg_quote', $tagnames ) );
return '(\[?)'
. '\[(' . $tagregexp . ')(?:[\r\n\t ](.*?))?(?:[\r\n\t ](\/))?\]'
. '(?:([^[]*?)\[\/\2\])?'
. '(\]?)';
}
private function replace_callback( $m ) {
return $this->scan_callback( $m, true );
}
private function scan_callback( $m, $replace = false ) {
// allow [[foo]] syntax for escaping a tag
if ( $m[1] == '['
and $m[6] == ']' ) {
return substr( $m[0], 1, -1 );
}
$tag = $m[2];
$attr = $this->parse_atts( $m[3] );
$scanned_tag = array(
'type' => $tag,
'basetype' => trim( $tag, '*' ),
'raw_name' => '',
'name' => '',
'options' => array(),
'raw_values' => array(),
'values' => array(),
'pipes' => null,
'labels' => array(),
'attr' => '',
'content' => '',
);
if ( $this->tag_type_supports( $tag, 'singular' )
and $this->filter( $this->scanned_tags, array( 'type' => $tag ) ) ) {
// Another tag in the same type already exists. Ignore this one.
return $m[0];
}
if ( is_array( $attr ) ) {
if ( is_array( $attr['options'] ) ) {
if ( $this->tag_type_supports( $tag, 'name-attr' )
and ! empty( $attr['options'] ) ) {
$scanned_tag['raw_name'] = array_shift( $attr['options'] );
if ( ! wpcf7_is_name( $scanned_tag['raw_name'] ) ) {
return $m[0]; // Invalid name is used. Ignore this tag.
}
$scanned_tag['name'] = strtr( $scanned_tag['raw_name'], '.', '_' );
}
$scanned_tag['options'] = (array) $attr['options'];
}
$scanned_tag['raw_values'] = (array) $attr['values'];
if ( WPCF7_USE_PIPE ) {
$pipes = new WPCF7_Pipes( $scanned_tag['raw_values'] );
$scanned_tag['values'] = $pipes->collect_befores();
$scanned_tag['pipes'] = $pipes;
} else {
$scanned_tag['values'] = $scanned_tag['raw_values'];
}
$scanned_tag['labels'] = $scanned_tag['values'];
} else {
$scanned_tag['attr'] = $attr;
}
$scanned_tag['values'] = array_map( 'trim', $scanned_tag['values'] );
$scanned_tag['labels'] = array_map( 'trim', $scanned_tag['labels'] );
$content = trim( $m[5] );
$content = preg_replace( "/<br[\r\n\t ]*\/?>$/m", '', $content );
$scanned_tag['content'] = $content;
$scanned_tag = apply_filters( 'wpcf7_form_tag', $scanned_tag, $replace );
$scanned_tag = new WPCF7_FormTag( $scanned_tag );
$this->scanned_tags[] = $scanned_tag;
if ( $replace ) {
$func = $this->tag_types[$tag]['function'];
return $m[1] . call_user_func( $func, $scanned_tag ) . $m[6];
} else {
return $m[0];
}
}
private function parse_atts( $text ) {
$atts = array( 'options' => array(), 'values' => array() );
$text = preg_replace( "/[\x{00a0}\x{200b}]+/u", " ", $text );
$text = trim( $text );
$pattern = '%^([-+*=0-9a-zA-Z:.!?#$&@_/|\%\r\n\t ]*?)((?:[\r\n\t ]*"[^"]*"|[\r\n\t ]*\'[^\']*\')*)$%';
if ( preg_match( $pattern, $text, $match ) ) {
if ( ! empty( $match[1] ) ) {
$atts['options'] = preg_split( '/[\r\n\t ]+/', trim( $match[1] ) );
}
if ( ! empty( $match[2] ) ) {
preg_match_all( '/"[^"]*"|\'[^\']*\'/', $match[2], $matched_values );
$atts['values'] = wpcf7_strip_quote_deep( $matched_values[0] );
}
} else {
$atts = $text;
}
return $atts;
}
}