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| #!/usr/bin/env php
<?php
/**
* Add an ID to each content tag in the given HTML file so
* that it's possible to link to each paragraph.
*
* The rules are:
* - content tags get an ID (p, li, dd, dt)
* - IDs of headings are used as prefix for the following content tags
* - if one content tag (li) contains a content tag (p), the parent content
* tag (li) gets its id removed
* - ids get prefixed
*
* @author Christian Weiske <cweiske@cweiske.de>
*/
$bRemoveContainerIdsOnContent = false;
if ($argc < 2) {
echo "Please pass a file\n";
exit(1);
}
$file = $argv[1];
if (!file_exists($file)) {
echo "File does not exist: $file\n";
exit(2);
}
if (substr($file, -4) != '.htm') {
echo "add-ids works only on htm files\n";
exit(3);
}
require_once 'autoload.php';
$sx = simplexml_load_file($file);
if ($sx === false) {
echo "Failed to load XML\n";
exit(4);
}
//tags whose ID is used as prefix for the next
$refTags = array_flip(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'));
$idTags = array(
'blockquote' => 'q',
'dd' => 'd',
'dl' => 'l',
'dt' => 't',
'h1' => 'h',
'h2' => 'h',
'h3' => 'h',
'h4' => 'h',
'h5' => 'h',
'h6' => 'h',
'li' => 'i',
'ol' => 'l',
'p' => 'p',
'pre' => 'c',
'ul' => 'l',
);
$containerTags = array_flip(
array(
'blockquote', 'div',
'dl', 'ol', 'ul', 'li'
)
);
$idPrefix = '';
$counter = array();
$existingIds = array();
addIds($sx->body->children());
function addIds($tags) {
global $containerTags, $idTags, $refTags,
$idPrefix, $counter, $existingIds, $bRemoveContainerIdsOnContent;
$contentIds = 0;
foreach ($tags as $tag) {
$tagname = $tag->getName();
if (!array_key_exists($tagname, $idTags)
&& !array_key_exists($tagname, $containerTags)) {
continue;
}
if (isset($tag['id'])) {
$existingIds[(string) $tag['id']] = true;
if (isset($refTags[$tagname])) {
$idPrefix = $tag['id'] . '-';
//reset counter, but keep heading counter
foreach ($counter as $key => $val) {
if ($key != 'h') {
$counter[$key] = 0;
}
}
}
} else if (isset($idTags[$tagname])) {
//add ID to element
$idtagname = $idTags[$tagname];
if (!isset($counter[$idtagname])) {
$counter[$idtagname] = 0;
}
do {
$newId = $idPrefix . $idtagname . ++$counter[$idtagname];
} while (isset($existingIds[$newId]));
$tag['id'] = $newId;
$existingIds[$newId] = true;
}
if (isset($containerTags[$tagname])) {
$childContentIds = addIds($tag->children());
$contentIds += $childContentIds;
if ($bRemoveContainerIdsOnContent && $childContentIds > 0) {
unset($tag['id']);
}
} else if (isset($idTags[$tagname])) {
$contentIds++;
}
}
return $contentIds;
}
$newXml = $sx->asXML();
if (strlen($newXml) < filesize($file)) {
echo "Something went wrong when adding IDs to $file\n";
exit(10);
}
file_put_contents($file, $newXml);
?>
|
