Changeset 3348838

Timestamp:

08/22/2025 11:11:58 PM (7 months ago)

Author:

mdawaffe

Message:

WP-LaTeX: Improve inline syntax handling

1. More efficient regular expression: unroll the loop.
2. Use wp_html_split() to only look for LaTeX in HTML text nodes.
3. Tell do_shortcode() to ignore shortcodes in HTML attributes when processing [latex] shortcodes.

File:

• wp-latex/trunk/wp-latex.php (modified) (2 diffs)

wp-latex/trunk/wp-latex.php

@@ -118 +118 @@
             return $content;
 
-        return preg_replace_callback( '#(\s*)\$latex[= ](.*?[^\\\\])\$(\s*)#', array( &$this, 'inline_to_shortcode_callback' ), $content );
+        $textarr = wp_html_split( $content );
+
+        $regex = '%
+            (\s*) # 1: Leading whitespace
+            \$latex(?:=\s*|\s+)
+            ((?:
+                [^$]+ # Not a dollar
+            |
+                (?<=(?<!\\\\)\\\\)\$ # Dollar preceded by exactly one slash
+            )+)   # 2: Content
+            (?<!\\\\)\$ # Dollar preceded by zero slashes
+            (\s*) # 3: Trailing whitespace
+        %ix';
+
+        foreach ( $textarr as &$element ) {
+            if ( '' == $element || '<' === $element[0] ) {
+                continue;
+            }
+
+            if ( false === stripos( $element, '$latex' ) ) {
+                continue;
+            }
+
+            $element = preg_replace_callback( $regex, array( &$this, 'inline_to_shortcode_callback' ), $element );
+        }
+
+        return implode( '', $textarr );
     }
 
@@ -148 +174 @@
         add_shortcode( 'latex', array( $this, 'shortcode' ) );
 
-        $text = do_shortcode( $text );
+        $text = do_shortcode( $text, true );
 
         $GLOBALS['shortcode_tags'] = $current_shortcodes;