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<?php
/**
* Part of grauphel
*
* PHP version 5
*
* @category Tools
* @package Grauphel
* @author Christian Weiske <cweiske@cweiske.de>
* @copyright 2014 Christian Weiske
* @license http://www.gnu.org/licenses/agpl.html GNU AGPL v3
* @link http://cweiske.de/grauphel.htm
*/
namespace OCA\Grauphel\Converter;
use \XMLReader;
/**
* Convert Tomboy note XML to HTML
*
* Tomboy already ships with a converter:
* https://git.gnome.org/browse/tomboy/tree/Tomboy/Addins/ExportToHtml/ExportToHtml.xsl
* We cannot use it since we want nice callbacks, and we do not want to rely
* on the PHP XSL extension, and we have to fix the links.
*
* @category Tools
* @package Grauphel
* @author Christian Weiske <cweiske@cweiske.de>
* @copyright 2014 Christian Weiske
* @license http://www.gnu.org/licenses/agpl.html GNU AGPL v3
* @version Release: @package_version@
* @link http://cweiske.de/grauphel.htm
*/
class Html extends Base
{
protected static $tagMap = array(
'list' => 'ul',
'list-item' => 'li',
'bold' => 'b',
'italic' => 'i',
'monospace' => 'tt',
);
protected static $styleClassMap = array(
'strikethrough' => 'strikethrough',
'highlight' => 'highlight',
'size:small' => 'small',
'size:large' => 'large',
'size:huge' => 'huge',
);
public $internalLinkHandler;
public function __construct()
{
$this->internalLinkHandler = array($this, 'internalLinkHandler');
}
/**
* Converts the tomboy note XML into HTML
*
* @param string $xmlContent Tomboy note content
*
* @return string HTML
*/
public function convert($xmlContent)
{
if (strpos($xmlContent, '</link:internal><link:internal>') !== false) {
$xmlContent = $this->fixNastyLinks($xmlContent);
}
$html = '';
$reader = new XMLReader();
$reader->xml(
'<?xml version="1.0" encoding="utf-8"?>' . "\n"
. '<content xmlns:size="size" xmlns:link="link">'
. $xmlContent
. '</content>'
);
$withinLink = false;
$store = &$html;
while ($reader->read()) {
switch ($reader->nodeType) {
case XMLReader::ELEMENT:
//echo $reader->name . "\n";
if (isset(static::$tagMap[$reader->name])) {
$store .= '<' . static::$tagMap[$reader->name] . '>';
} else if (isset(static::$styleClassMap[$reader->name])) {
$store .= '<span class="'
. static::$styleClassMap[$reader->name]
. '">';
} else if (substr($reader->name, 0, 5) == 'link:') {
$withinLink = true;
$linkText = '';
$store = &$linkText;
}
break;
case XMLReader::END_ELEMENT:
if (isset(static::$tagMap[$reader->name])) {
$store .= '</' . static::$tagMap[$reader->name] . '>';
} else if (isset(static::$styleClassMap[$reader->name])) {
$store .= '</span>';
} else if (substr($reader->name, 0, 5) == 'link:') {
$withinLink = false;
$store = &$html;
$linkUrl = htmlspecialchars_decode(strip_tags($linkText));
if ($reader->name == 'link:internal') {
$linkUrl = call_user_func($this->internalLinkHandler, $linkUrl);
} else {
$linkUrl = $this->fixLinkUrl($linkUrl);
}
$store .= '<a href="' . htmlspecialchars($linkUrl) . '">'
. $linkText
. '</a>';
}
break;
case XMLReader::TEXT:
case XMLReader::SIGNIFICANT_WHITESPACE:
$store .= nl2br(htmlspecialchars($reader->value));
break;
default:
throw new Exception(
'Unsupported XML node type: ' . $reader->nodeType
);
}
}
$html = str_replace("</ul><br />\n", "</ul>\n", $html);
return $html;
}
/**
* Fixes external URLs without a protocol
*
* @param string $linkUrl URL to fix
*
* @return string Fixed URL
*/
protected function fixLinkUrl($linkUrl)
{
if ($linkUrl{0} == '/') {
//Unix file path
$linkUrl = 'file://' . $linkUrl;
}
return $linkUrl;
}
/**
* Dummy internal link handler that simply adds ".htm" to the note title
*
* @param string $linkUrl Title of page that is linked
*
* @return string URL to link to
*/
public function internalLinkHandler($linkUrl)
{
return $linkUrl . '.htm';
}
}
?>
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