<pre> tag?', $this->textdomain ),
'help' => __( '<pre> helps to preserve whitespace', $this->textdomain ) ),
'use_nbsp_for_spaces' => array( 'input' => 'checkbox', 'default' => true,
'label' => __( 'Use for spaces?', $this->textdomain ),
'help' => __( 'Not necessary if you are wrapping code in <pre> or you use CSS to define whitespace:pre; for code tags.', $this->textdomain ) ),
'nl2br' => array( 'input' => 'checkbox', 'default' => false,
'label' => __( 'Convert newlines to <br/>?', $this->textdomain ),
'help' => __( 'Depending on your CSS styling, you may need this. Otherwise, code may appear double-spaced.', $this->textdomain ) )
);
}
/**
* Override the plugin framework's register_filters() to register actions and filters.
*
* @return void
*/
public function register_filters() {
$options = $this->get_options();
add_filter( 'the_content', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'the_content', array( &$this, 'preserve_postprocess_and_preserve'), 100 );
add_filter( 'content_save_pre', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'content_save_pre', array( &$this, 'preserve_postprocess' ), 100 );
add_filter( 'the_excerpt', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'the_excerpt', array( &$this, 'preserve_postprocess_and_preserve' ), 100 );
add_filter( 'excerpt_save_pre', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'excerpt_save_pre', array( &$this, 'preserve_postprocess' ), 100 );
if ( $options['preserve_in_comments'] ) {
add_filter( 'comment_text', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'comment_text', array( &$this, 'preserve_postprocess_and_preserve' ), 100 );
add_filter( 'pre_comment_content', array( &$this, 'preserve_preprocess' ), 2 );
add_filter( 'pre_comment_content', array( &$this, 'preserve_postprocess' ), 100 );
}
}
/**
* Outputs the text above the setting form
*
* @return void (Text will be echoed.)
*/
public function options_page_description() {
$options = $this->get_options();
parent::options_page_description( __( 'Preserve Code Formatting Settings', $this->textdomain ) );
echo '' . __( 'Preserve formatting for text within <code> and <pre> tags (other tags can be defined as well). Helps to preserve code indentation, multiple spaces, prevents WP\'s fancification of text (ie. ensures quotes don\'t become curly, etc).', $this->textdomain ) . '
'; echo '' . __( 'NOTE: Use of the visual text editor will pose problems as it can mangle your intent in terms of <code> tags. I do not offer any support for those who have the visual editor active.', $this->textdomain ) . '
'; } /** * Preps code. * * @param string $text Text to prep * @return string The prepped text */ public function prep_code( $text ) { $options = $this->get_options(); $text = preg_replace( "/(\r\n|\n|\r)/", "\n", $text ); $text = preg_replace( "/\n\n+/", "\n\n", $text ); $text = str_replace( array( "$&;", "'&;" ), array( "$", "'" ), $text ); $text = htmlspecialchars( $text, ENT_QUOTES ); $text = str_replace( "\t", ' ', $text ); if ( $options['use_nbsp_for_spaces'] ) $text = str_replace( ' ', ' ', $text ); if ( $options['nl2br'] ) $text = nl2br( $text ); return $text; } /** * Preserves the code formatting for text. * * @param string $text Text with code formatting to preserve * @return string The text with code formatting preserved */ public function preserve_code_formatting( $text ) { $text = str_replace( array( '$', "'" ), array( '$&;', ''&;' ), $text ); $text = $this->prep_code( $text ); $text = str_replace( array( '$&;', ''&;', '< ?php' ), array( '$', "'", '<?php' ), $text ); return $text; } /** * Preprocessor for code formatting preservation process. * * @param string $content Text with code formatting to preserve * @return string The text with code formatting preprocessed */ public function preserve_preprocess( $content ) { $options = $this->get_options(); $preserve_tags = $options['preserve_tags']; $result = ''; foreach ( $preserve_tags as $tag ) { if ( ! empty( $result ) ) { $content = $result; $result = ''; } $codes = preg_split( "/(<{$tag}[^>]*>.*<\\/{$tag}>)/Us", $content, -1, PREG_SPLIT_DELIM_CAPTURE ); foreach ( $codes as $code ) { if ( preg_match( "/^<({$tag}[^>]*)>(.*)<\\/{$tag}>/Us", $code, $match ) ) { $code = "[[{$match[1]}]]"; $code .= base64_encode( addslashes( chunk_split( serialize( $match[2]), 76, $this->chunk_split_token ) ) ); $code .= "[[/{$tag}]]"; } $result .= $code; } } return $result; } /** * Post-processor for code formatting preservation process. * * @param string $content Text with code formatting that had been preprocessed * @param bool $preserve (optional) Preserve? * @return string The text with code formatting post-processed */ public function preserve_postprocess( $content, $preserve = false ) { $options = $this->get_options(); $preserve_tags = $options['preserve_tags']; $wrap_multiline_code_in_pre = $options['wrap_multiline_code_in_pre']; $result = ''; foreach ( $preserve_tags as $tag ) { if ( ! empty( $result ) ) { $content = $result; $result = ''; } $codes = preg_split( "/(\\[\\[{$tag}[^\\]]*\\]\\].*\\[\\[\\/{$tag}\\]\\])/Us", $content, -1, PREG_SPLIT_DELIM_CAPTURE ); foreach ( $codes as $code ) { if ( preg_match( "/\\[\\[({$tag}[^\\]]*)\\]\\](.*)\\[\\[\\/{$tag}\\]\\]/Us", $code, $match ) ) { $data = unserialize( str_replace( $this->chunk_split_token, '', stripslashes( base64_decode( $match[2] ) ) ) ); if ( $preserve ) $data = $this->preserve_code_formatting( $data ); $code = "<{$match[1]}>$data"; if ( $preserve && $wrap_multiline_code_in_pre && preg_match( "/\n/", $data ) ) $code = '' . $code . ''; } $result .= $code; } } return $result; } /** * Post-processor for code formatting preservation process that defaults to true for preserving. * * @param string $content Text with code formatting to post-process and preserve * @return string The text with code formatting post-processed and preserved */ public function preserve_postprocess_and_preserve( $content ) { return $this->preserve_postprocess( $content, true ); } } // end c2c_PreserveCodeFormatting // To access plugin object instance use: c2c_PreserveCodeFormatting::$instance new c2c_PreserveCodeFormatting(); endif; // end if !class_exists() ?>