index.php

<?php

include("translate.php");

$DEBUG = FALSE;
$TEST = FALSE;

if($TEST) {
  assert_options(ASSERT_ACTIVE, 1);
  assert_options(ASSERT_BAIL, 1);
  $_GET = array('getModule' => 'm11429', 'getLanguage' => 'af');
}

$module = $_GET["getModule"];
if($module) {
  if($DEBUG) {
    $fp = fopen("index.cnxml", "rb");
    $language = "en"; // English implies no translation
  } else {
    $url = 'http://cnx.org/content/' . $module . '/latest/index.cnxml';
    $fp = fopen($url, "rb");
    $language = $_GET["getLanguage"];
  }

  // Get original CNXML
  $text = "";
  while(!feof($fp)) {
    $text .= fread($fp, 8192);
  }
  fclose($fp);

  // Translate
  if($language != "en") {
    $version = get_cnxml_version($text);
    $url = 'http://cnx.org/content/' . $module . '/' . $version . '/module_export?format=plain';
    $translation = translate_cnxml($url, "en", $language);
    $text = fix_cnxml_translation($text, $translation);
  }
} else {
  $module = "";
  $language = "en";
  $text = "";
}

// Clean text
// Remove metadata
$metaStart = strpos($text, "<metadata ");
if($metaStart !== FALSE) {
  $metaStop = strpos($text, "</metadata>") + 11;
  $metaText = substr($text, $metaStart, $metaStop-$metaStart);
  $text = substr($text, 0, $metaStart) . "<metadata/>" . substr($text, $metaStop);
} else
  $metaText = "";

// Force XML tags to be on 1 line
$closePos = -1;
$oldText = $text;
$text = "";
while(TRUE) {
  $startPos = $closePos+1;
  $openPos = strpos($oldText, "<", $startPos);
  if($openPos === FALSE)
    break;
  $closePos = strpos($oldText, ">", $openPos+1);
  if($closePos === FALSE)
    break;
  $text .= substr($oldText, $startPos, $openPos-$startPos);
  $text .= preg_replace('!\s+!', ' ', substr($oldText, $openPos, $closePos-$openPos+1));
}
$text .= substr($oldText, $startPos);

// Specially treat tags that should really be inline with rest of text
$tagsForceInline = array("emphasis","term"); // I'm assuming these are unnested tags
foreach($tagsForceInline as $tagName) {
  $newText = '';
  $pos = 0;
  while(TRUE) {
    $openTagStart = stripos($text, '<' . $tagName, $pos);
    if($openTagStart === FALSE)
      break;
    $openTagStop = stripos($text, '>', $openTagStart)+1;
    $closeTag = '</' . $tagName . '>';
    $closeTagStart = stripos($text, $closeTag, $openTagStop);
    assert('$closeTagStart !== FALSE');
    $closeTagStop = $closeTagStart + strlen($closeTag);

    $whitespace = FALSE;
    $pos1 = $openTagStart;
    /*
    while(($pos1 > 0) and (in_array($text[$pos1-1], array(" ", "\n", "\r", "\t")))) {
      $whitespace = TRUE;
      $pos1 -= 1;
    }
    */
    $newText .= substr($text, $pos, $pos1-$pos);
    if($whitespace)
      $newText .= ' ';
    $newText .= substr($text, $openTagStart, $openTagStop-$openTagStart);
    $newText .= trim(substr($text, $openTagStop, $closeTagStart-$openTagStop));
    $newText .= substr($text, $closeTagStart, $closeTagStop-$closeTagStart);
    $pos = $closeTagStop;
    /*
    $whitespace = FALSE;
    while(($pos < strlen($text)) and (in_array($text[$pos], array(" ", "\n", "\r", "\t")))) {
      $whitespace = TRUE;
      $pos += 1;
    }
    if($whitespace)
      $newText .= ' ';
    */
  }
  $newText .= substr($text, $pos);
  $text = $newText;
}

// Clean up XML tag indentation and text wrapping
$indent = 0;
$tagStack = array();
$textPos = 0;
$newText = "";
$maxColumns = 80;

function wrap_text($text, $indent, $columns) {
  $indent = str_repeat(" ", $indent);
  return $indent . wordwrap(preg_replace('!\s+!', ' ', $text), $columns, "\n" . $indent);
}

while(TRUE) {
  $tagStart = $textPos;
  while(TRUE) {
    $tagStart = strpos($text, "<", $tagStart);
    if($tagStart === FALSE)
      break;
    $tagStop = strpos($text, ">", $tagStart);
    $space = strpos($text, ' ', $tagStart);
    if(($space === FALSE) or ($tagStop < $space))
      $space = $tagStop;
    $tagName = substr($text, $tagStart+1, $space-($tagStart+1));
    if(in_array($tagName, $tagsForceInline)) {
      $closeTag = '</' . $tagName . '>';
      $tagStart = stripos($text, $closeTag, $tagStop);
      assert('$tagStart !== FALSE');
      $tagStart += strlen($closeTag);
    } else
      break;
  }
  if($tagStart === FALSE)
    break;
  $preTag = trim(substr($text, $textPos, $tagStart-$textPos)); // Everything before the next tag
  $tag = substr($text, $tagStart, $tagStop-$tagStart+1);
  $textPos = $tagStop + 1;

  if(strlen($preTag) > 0)
    $newText .= wrap_text($preTag, $indent, $maxColumns) . "\n";

  if($tag[1] == "/") {
    // Closing tag
    $indent -= 1;
    $newText .= str_repeat(" ", $indent) . $tag . "\n";
  } else {
    // Opening or self-closing tag or comment
    $newText .= str_repeat(" ", $indent) . $tag . "\n";
    if(($tag[strlen($tag)-2] != '/') and
       (substr($tag, 0, 4) != "<!--"))
      $indent += 1;
  }
}

$text = $newText;

?>
<html>
  <head>
    <title>CNXML Editor</title>
    <link rel="stylesheet" href="lib/codemirror.css">
    <script src="lib/codemirror.js"></script>
    <script src="xml.js"></script>
    <link rel="stylesheet" href="xml.css">
    <style type="text/css">.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style>
    <link rel="stylesheet" href="css/docs.css">
  <style type="text/css">body {margin-top: 10px; margin-bottom: 0px;}</style>
  </head>
  <body>
    <h2>CNXML Editor</h2>
    <form method="get" action="index.php">
      <p>Module number: <input type="text" name="getModule" value="<?php echo $module; ?>" size="10"/>
      &nbsp;&nbsp; Target language: <select name="getLanguage">
<?php

foreach($transLanguageList as $key=>$entry) {
  $entry = explode(":", $entry);
  echo '          <option value="' . $entry[0] . '"';
  if($entry[0] == $language)
    echo ' selected';
  echo '>' . $entry[1] . '</option>' . "\n";
}

?>        </select>
        &nbsp;&nbsp; <input type="submit" value="Get"/>
      </p>
    </form>
    <form>
      <input type="hidden" name="metadata" value="<?php echo htmlentities($metaText); ?>"/>
      <input type="button" value="emphasis tag" onClick="insertSurroundingTag(editor, 'emphasis');"/>
      <br/>
      <textarea id="code" name="code" onClick="alert(\"blah\");"><?php echo htmlentities($text); ?></textarea>
      <br/>
<?php if($DEBUG) { ?>
      <h2>Debug Info</h2>
      <textarea id="info" name="info" rows="10" cols="80"></textarea>
      <br><input type="text" id="keycode" size="15" />
<?php } ?>
    </form>
    <script type="text/javascript" src="cnxmltrans.js">
    </script>
  </body>
</html>