First commit

3rdparty/luminous/languages/latex.php

@@ -0,0 +1,68 @@
+<?php
+/*
+ * LaTeX scanner,
+ * brief explanation: we're using the stateful scanner to handle marginally
+ * different rulesets in math blocks.
+ * We could add in an awful lot of detail, everything is pretty generic right
+ * now, we don't look for any specific names or anything, but it'll suffice
+ * for basic highlighting.
+ */
+class LuminousLatexScanner extends LuminousStatefulScanner {
+
+  function init() {
+
+    
+    // math states
+    $this->add_pattern('displaymath', '/\\$\\$/', '/\\$\\$/');
+    // literal '\[' and '\]'
+    $this->add_pattern('displaymath', '/\\\\\\[/', '/\\\\\\]/');
+    $this->add_pattern('mathmode', '/\\$/', '/\\$/');
+    
+    // terminals
+    $this->add_pattern('COMMENT', '/%.*/');
+    $this->add_pattern('NUMERIC', '/\d+(\.\d+)?\w*/');
+    $this->add_pattern('MATH_FUNCTION', '/\\\\(?:[a-z_]\w*|[^\]])/i');
+    $this->add_pattern('MATHOP', '/[\\*^\\-=+]+/');
+
+    $this->add_pattern('FUNCTION', '/\\\\(?:[a-z_]\w*|.)/i');
+    $this->add_pattern('IDENT', '/[a-z_]\w*/i');
+
+    $this->add_pattern('OPERATOR', '/[\[\]\{\}]+/');
+
+    $math_transition = array('NUMERIC', 'MATH_FUNCTION', 'MATHOP');
+
+    $this->transitions = array(
+      'initial' => array('COMMENT', 'OPERATOR', 'displaymath', 'mathmode',
+        'FUNCTION', 'IDENT'),
+      // omitting initial state defn. makes it transition to everything
+      'displaymath' => $math_transition,
+      'mathmode' => $math_transition,
+    );
+
+    $this->rule_tag_map = array(
+      'displaymath' => 'INTERPOLATION',
+      'mathmode' => 'INTERPOLATION',
+      'MATHOP' => 'OPERATOR',
+      'MATH_FUNCTION' => 'VALUE', // arbitrary way to distinguish it from non
+      // math mode functions
+    );
+  }
+
+  public static function guess_language($src, $info) {
+    $p = 0.0;
+    foreach(array('documentclass', 'usepackage', 'title',
+      'maketitle', 'end') as $cmd)
+    {
+      if (strpos($src, '\\' . $cmd) !== false) $p += 0.1;
+    }
+    // count the number of backslashes
+    $bslashes = substr_count($src, '\\');
+    if ($bslashes > $info['num_lines']) {
+      $p += 0.1;
+    }
+    if (substr_count($src, '%') > $info['num_lines']/10) {
+      $p += 0.02;
+    }
+    return $p;
+  }
+}