'attr>keyword>*meta_nobg /(\{\$)([\s\S]*?)(\$\})/g /#[#a-f\d]+/i /\\\\[a-z]+/gi /[{}$&;]+|\\\\[^\s\w]/g', )); SDV($FormulaUrl,"https://chart.googleapis.com/chart?cht=tx&chl="); SDV($FormulaTextColor, "000000"); SDV($FormulaBgColor, "ffffff"); Markup('{$', 'directives', '/\\{\\$(.*?)\\$\\}/', "FmtFormula"); SDV($GUIButtons['math'],array(1000, '{$ ', ' $}', '\\\\sqrt{n}', '$GUIButtonDirUrlFmt/math.gif"$[Math formula (TeX)]"')); function FmtFormula($m) { global $FormulaBgColor, $FormulaTextColor, $FormulaUrl; $text = trim($m[1]); $F = $FormulaTextColor; $B = $FormulaBgColor; $crx = '/^#([0-9a-f]{1,8})?(#([0-9a-f]{1,8}))? /'; if(preg_match($crx, $text, $m)) { $text = trim(preg_replace($crx, '', $text)); if($m[1]>'') $F = FormulaColors($m[1]); if(@$m[3]>'') $B = FormulaColors($m[3]); } $r = array('/\\s+([^\\w\\s\\\\]|\\\\\\w)/'=>'$1', '/([^\\w\\s\\\\])\\s+/'=>'$1', '/</'=>'<', '/>/'=>'>', '/&/'=>'&', '/\\s{2,}/'=>' '); $u = urlencode(preg_replace(array_keys($r), array_values($r), $text)); $a = str_replace("'","'",$text); $fc = ($F=="000000")? '' : "&chco=$F"; $bc = ($B=="ffffff")? '' : "&chf=bg,s,$B"; return Keep(""); } function FormulaColors($c) { switch(strlen($c)) { case 6: case 8: return $c; case 7: return $c.$c[6]; case 5: return $c.$c[4]; case 4: return $c[0].$c[0].$c[1].$c[1].$c[2].$c[2].$c[3].$c[3]; case 3: return $c[0].$c[0].$c[1].$c[1].$c[2].$c[2]; case 2: return str_repeat($c, 3); case 1: return str_repeat($c, 6); } }