-<?
-
-function linkToMathImage ( $tex, $outputhash )
-{
- global $wgMathPath;
- return "<img src=\"".$wgMathPath."/".$outputhash.".png\" alt=\"".wfEscapeHTML($tex)."\">";
-}
-
-function renderMath( $tex )
-{
- global $wgUser, $wgMathDirectory, $wgTmpDirectory, $wgInputEncoding;
- $mf = wfMsg( "math_failure" );
- $munk = wfMsg( "math_unknown_error" );
-
- $fname = "renderMath";
-
- $math = $wgUser->getOption("math");
- if ($math == 3)
- return ('$ '.wfEscapeHTML($tex).' $');
-
- $md5 = md5($tex);
- $md5_sql = mysql_escape_string(pack("H32", $md5));
- if ($math == 0)
- $sql = "SELECT math_outputhash FROM math WHERE math_inputhash = '".$md5_sql."'";
- else
- $sql = "SELECT math_outputhash,math_html_conservativeness,math_html FROM math WHERE math_inputhash = '".$md5_sql."'";
-
- $res = wfQuery( $sql, DB_READ, $fname );
+<?php
+/**
+ * Contain everything related to <math> </math> parsing
+ * @package MediaWiki
+ */
+
+/**
+ * Takes LaTeX fragments, sends them to a helper program (texvc) for rendering
+ * to rasterized PNG and HTML and MathML approximations. An appropriate
+ * rendering form is picked and returned.
+ *
+ * by Tomasz Wegrzanowski, with additions by Brion Vibber (2003, 2004)
+ *
+ * @package MediaWiki
+ */
+class MathRenderer {
+ var $mode = MW_MATH_MODERN;
+ var $tex = '';
+ var $inputhash = '';
+ var $hash = '';
+ var $html = '';
+ var $mathml = '';
+ var $conservativeness = 0;
+
+ function MathRenderer( $tex ) {
+ $this->tex = $tex;
+ }
+
+ function setOutputMode( $mode ) {
+ $this->mode = $mode;
+ }
- if( $rpage = wfFetchObject ( $res ) ) {
- $outputhash = unpack( "H32md5", $rpage->math_outputhash . " " );
- $outputhash = $outputhash ['md5'];
- if( file_exists( "$wgMathDirectory/$outputhash.png" ) ) {
- if (($math == 0) || ($rpage->math_html == '') || (($math == 1) && ($rpage->math_html_conservativeness != 2)) || (($math == 4) && ($rpage->math_html_conservativeness == 0)))
- return linkToMathImage ( $tex, $outputhash );
- else
- return $rpage->math_html;
+ function render() {
+ global $wgMathDirectory, $wgTmpDirectory, $wgInputEncoding;
+ global $wgTexvc;
+ $fname = 'MathRenderer::render';
+
+ if( $this->mode == MW_MATH_SOURCE ) {
+ # No need to render or parse anything more!
+ return ('$ '.htmlspecialchars( $this->tex ).' $');
+ }
+
+ if( !$this->_recall() ) {
+ # Ensure that the temp and output directories are available before continuing...
+ if( !file_exists( $wgMathDirectory ) ) {
+ if( !@mkdir( $wgMathDirectory ) ) {
+ return $this->_error( 'math_bad_output' );
+ }
+ } elseif( !is_dir( $wgMathDirectory ) || !is_writable( $wgMathDirectory ) ) {
+ return $this->_error( 'math_bad_output' );
+ }
+ if( !file_exists( $wgTmpDirectory ) ) {
+ if( !@mkdir( $wgTmpDirectory ) ) {
+ return $this->_error( 'math_bad_tmpdir' );
+ }
+ } elseif( !is_dir( $wgTmpDirectory ) || !is_writable( $wgTmpDirectory ) ) {
+ return $this->_error( 'math_bad_tmpdir' );
+ }
+
+ if( function_exists( 'is_executable' ) && !is_executable( $wgTexvc ) ) {
+ return $this->_error( 'math_notexvc' );
+ }
+ $cmd = $wgTexvc . ' ' .
+ escapeshellarg( $wgTmpDirectory ).' '.
+ escapeshellarg( $wgMathDirectory ).' '.
+ escapeshellarg( $this->tex ).' '.
+ escapeshellarg( $wgInputEncoding );
+
+ if ( wfIsWindows() ) {
+ # Invoke it within cygwin sh, because texvc expects sh features in its default shell
+ $cmd = 'sh -c ' . wfEscapeShellArg( $cmd );
+ }
+
+ wfDebug( "TeX: $cmd\n" );
+ $contents = `$cmd`;
+ wfDebug( "TeX output:\n $contents\n---\n" );
+
+ if (strlen($contents) == 0) {
+ return $this->_error( 'math_unknown_error' );
+ }
+
+ $retval = substr ($contents, 0, 1);
+ if (($retval == 'C') || ($retval == 'M') || ($retval == 'L')) {
+ if ($retval == 'C')
+ $this->conservativeness = 2;
+ else if ($retval == 'M')
+ $this->conservativeness = 1;
+ else
+ $this->conservativeness = 0;
+ $outdata = substr ($contents, 33);
+
+ $i = strpos($outdata, "\000");
+
+ $this->html = substr($outdata, 0, $i);
+ $this->mathml = substr($outdata, $i+1);
+ } else if (($retval == 'c') || ($retval == 'm') || ($retval == 'l')) {
+ $this->html = substr ($contents, 33);
+ if ($retval == 'c')
+ $this->conservativeness = 2;
+ else if ($retval == 'm')
+ $this->conservativeness = 1;
+ else
+ $this->conservativeness = 0;
+ $this->mathml = NULL;
+ } else if ($retval == 'X') {
+ $this->html = NULL;
+ $this->mathml = substr ($contents, 33);
+ $this->conservativeness = 0;
+ } else if ($retval == '+') {
+ $this->html = NULL;
+ $this->mathml = NULL;
+ $this->conservativeness = 0;
+ } else {
+ $errbit = htmlspecialchars( substr($contents, 1) );
+ switch( $retval ) {
+ case 'E': return $this->_error( 'math_lexing_error', $errbit );
+ case 'S': return $this->_error( 'math_syntax_error', $errbit );
+ case 'F': return $this->_error( 'math_unknown_function', $errbit );
+ default: return $this->_error( 'math_unknown_error', $errbit );
+ }
+ }
+
+ $this->hash = substr ($contents, 1, 32);
+ if (!preg_match("/^[a-f0-9]{32}$/", $this->hash)) {
+ return $this->_error( 'math_unknown_error' );
+ }
+
+ if( !file_exists( "$wgMathDirectory/{$this->hash}.png" ) ) {
+ return $this->_error( 'math_image_error' );
+ }
+
+ # Now save it back to the DB:
+ if ( !wfReadOnly() ) {
+ $outmd5_sql = pack('H32', $this->hash);
+
+ $md5_sql = pack('H32', $this->md5); # Binary packed, not hex
+
+ $dbw =& wfGetDB( DB_MASTER );
+ $dbw->replace( 'math', array( 'math_inputhash' ),
+ array(
+ 'math_inputhash' => $md5_sql,
+ 'math_outputhash' => $outmd5_sql,
+ 'math_html_conservativeness' => $this->conservativeness,
+ 'math_html' => $this->html,
+ 'math_mathml' => $this->mathml,
+ ), $fname, array( 'IGNORE' )
+ );
+ }
+
}
+
+ return $this->_doRender();
}
- $cmd = "./math/texvc ".escapeshellarg($wgTmpDirectory)." ".
- escapeshellarg($wgMathDirectory)." ".escapeshellarg($tex)." ".escapeshellarg($wgInputEncoding);
- $contents = `$cmd`;
-
- if (strlen($contents) == 0)
- return "<b>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</b>";
- $retval = substr ($contents, 0, 1);
- if (($retval == "C") || ($retval == "M") || ($retval == "L")) {
- if ($retval == "C")
- $conservativeness = 2;
- else if ($retval == "M")
- $conservativeness = 1;
- else
- $conservativeness = 0;
- $outdata = substr ($contents, 33);
-
- $i = strpos($outdata, "\000");
-
- $outhtml = substr($outdata, 0, $i);
- $mathml = substr($outdata, $i+1);
-
- $sql_html = "'".mysql_escape_string($outhtml)."'";
- $sql_mathml = "'".mysql_escape_string($mathml)."'";
- } else if (($retval == "c") || ($retval == "m") || ($retval == "l")) {
- $outhtml = substr ($contents, 33);
- if ($retval == "c")
- $conservativeness = 2;
- else if ($retval == "m")
- $conservativeness = 1;
- else
- $conservativeness = 0;
- $sql_html = "'".mysql_escape_string($outhtml)."'";
- $mathml = '';
- $sql_mathml = 'NULL';
- } else if ($retval == "X") {
- $outhtml = '';
- $mathml = substr ($contents, 33);
- $sql_html = 'NULL';
- $sql_mathml = "'".mysql_escape_string($mathml)."'";
- $conservativeness = 0;
- } else if ($retval == "+") {
- $outhtml = '';
- $mathml = '';
- $sql_html = 'NULL';
- $sql_mathml = 'NULL';
- $conservativeness = 0;
- } else {
- if ($retval == "E")
- $errmsg = wfMsg( "math_lexing_error" );
- else if ($retval == "S")
- $errmsg = wfMsg( "math_syntax_error" );
- else if ($retval == "F")
- $errmsg = wfMsg( "math_unknown_function" );
- else
- $errmsg = $munk;
- return "<h3>".$mf." (".$errmsg.substr($contents, 1)."): ".wfEscapeHTML($tex)."</h3>";
+ function _error( $msg, $append = '' ) {
+ $mf = htmlspecialchars( wfMsg( 'math_failure' ) );
+ $munk = htmlspecialchars( wfMsg( 'math_unknown_error' ) );
+ $errmsg = htmlspecialchars( wfMsg( $msg ) );
+ $source = htmlspecialchars($this->tex);
+ return "<strong class='error'>$mf ($errmsg$append): $source</strong>\n";
+ }
+
+ function _recall() {
+ global $wgMathDirectory;
+ $fname = 'MathRenderer::_recall';
+
+ $this->md5 = md5( $this->tex );
+ $dbr =& wfGetDB( DB_SLAVE );
+ $rpage = $dbr->selectRow( 'math',
+ array( 'math_outputhash','math_html_conservativeness','math_html','math_mathml' ),
+ array( 'math_inputhash' => pack("H32", $this->md5)), # Binary packed, not hex
+ $fname
+ );
+
+ if( $rpage !== false ) {
+ # Tailing 0x20s can get dropped by the database, add it back on if necessary:
+ $xhash = unpack( 'H32md5', $rpage->math_outputhash . " " );
+ $this->hash = $xhash ['md5'];
+
+ $this->conservativeness = $rpage->math_html_conservativeness;
+ $this->html = $rpage->math_html;
+ $this->mathml = $rpage->math_mathml;
+
+ if( file_exists( "$wgMathDirectory/{$this->hash}.png" ) ) {
+ return true;
+ }
+ }
+
+ # Missing from the database and/or the render cache
+ return false;
}
- $outmd5 = substr ($contents, 1, 32);
- if (!preg_match("/^[a-f0-9]{32}$/", $outmd5))
- return "<b>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</b>";
+ /**
+ * Select among PNG, HTML, or MathML output depending on
+ */
+ function _doRender() {
+ if( $this->mode == MW_MATH_MATHML && $this->mathml != '' ) {
+ return "<math xmlns='http://www.w3.org/1998/Math/MathML'>{$this->mathml}</math>";
+ }
+ if (($this->mode == MW_MATH_PNG) || ($this->html == '') ||
+ (($this->mode == MW_MATH_SIMPLE) && ($this->conservativeness != 2)) ||
+ (($this->mode == MW_MATH_MODERN || $this->mode == MW_MATH_MATHML) && ($this->conservativeness == 0))) {
+ return $this->_linkToMathImage();
+ } else {
+ return '<span class="texhtml">'.$this->html.'</span>';
+ }
+ }
- $outmd5_sql = mysql_escape_string(pack("H32", $outmd5));
+ function _linkToMathImage() {
+ global $wgMathPath;
+ $url = htmlspecialchars( "$wgMathPath/{$this->hash}.png" );
+ $alt = trim(str_replace("\n", ' ', htmlspecialchars( $this->tex )));
+ return "<img class='tex' src=\"$url\" alt=\"$alt\" />";
+ }
- $sql = "REPLACE INTO math VALUES ('".$md5_sql."', '".$outmd5_sql."', ".$conservativeness.", ".$sql_html.", ".$sql_mathml.")";
-
- $res = wfQuery( $sql, DB_READ, $fname );
- # we don't really care if it fails
+}
- if (($math == 0) || ($rpage->math_html == '') || (($math == 1) && ($conservativeness != 2)) || (($math == 4) && ($conservativeness == 0)))
- return linkToMathImage($tex, $outmd5);
- else
- return $outhtml;
+function renderMath( $tex ) {
+ global $wgUser;
+ $math = new MathRenderer( $tex );
+ $math->setOutputMode( $wgUser->getOption('math'));
+ return $math->render();
}
?>
dépôts / lhc / web / wiklou.git / blobdiff