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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 reStructuredText.
* Mainly used to paste the content of a note into an e-mail
*
* @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 ReStructuredText extends Base
{
protected static $simpleMap = array(
'bold' => '**',
'italic' => '*',
'monospace' => '``',
'strikethrough' => '-',
'highlight' => '**',
);
public $internalLinkHandler;
public function __construct()
{
$this->internalLinkHandler = array($this, 'internalLinkHandler');
}
/**
* Converts the tomboy note XML into reStructuredText
*
* @param string $xmlContent Tomboy note content
*
* @return string Plain text
*/
public function convert($xmlContent)
{
if (strpos($xmlContent, '</link:internal><link:internal>') !== false) {
$xmlContent = $this->fixNastyLinks($xmlContent);
}
$rst = '';
$reader = new XMLReader();
$reader->xml(
'<?xml version="1.0" encoding="utf-8"?>' . "\n"
. '<content xmlns:size="size" xmlns:link="link">'
. $xmlContent
. '</content>'
);
$withinLink = false;
$store = &$rst;
$listLevel = -1;
$listPrefix = '';
$listItemCount = 0;
$heading = false;
$headingLength = 0;
while ($reader->read()) {
switch ($reader->nodeType) {
case XMLReader::ELEMENT:
//echo $reader->name . "\n";
if (isset(static::$simpleMap[$reader->name])) {
$store .= static::$simpleMap[$reader->name];
} else if ($reader->name == 'list') {
++$listLevel;
$listItemCount = 0;
$listPrefix = str_repeat(' ', $listLevel);
} else if ($reader->name == 'list-item') {
++$listItemCount;
if ($listItemCount == 1) {
$store .= "\n";
}
$store .= $listPrefix . '- ';
} else if ($reader->name == 'size:large'
|| $reader->name == 'size:huge'
) {
$store .= "\n";
$heading = true;
} else if (substr($reader->name, 0, 5) == 'link:') {
$withinLink = true;
$linkText = '';
$store = &$linkText;
}
break;
case XMLReader::END_ELEMENT:
if (isset(static::$simpleMap[$reader->name])) {
$store .= static::$simpleMap[$reader->name];
} else if ($reader->name == 'list') {
--$listLevel;
$listPrefix = str_repeat(
' ', $listLevel < 0 ? 0 : $listLevel
);
if ($listLevel == -1) {
$store .= "\n";
}
} else if ($reader->name == 'size:large') {
$store .= "\n" . str_repeat('-', $headingLength);
$heading = false;
} else if ($reader->name == 'size:huge') {
$store .= "\n" . str_repeat('=', $headingLength);
$heading = false;
} else if (substr($reader->name, 0, 5) == 'link:') {
$withinLink = false;
$store = &$rst;
$linkUrl = htmlspecialchars_decode(strip_tags($linkText));
if ($reader->name == 'link:internal') {
$linkUrl = call_user_func($this->internalLinkHandler, $linkUrl);
} else {
$linkUrl = $this->fixLinkUrl($linkUrl);
}
$store .= $linkUrl;
}
break;
case XMLReader::TEXT:
case XMLReader::SIGNIFICANT_WHITESPACE:
if ($heading) {
$headingLength = strlen(trim($reader->value));
$store .= trim($reader->value);
} else {
$text = wordwrap($reader->value, 72 - 2 * $listLevel, "\n");
$parts = explode("\n", $text);
foreach ($parts as $k => $v) {
if ($k == 0) {
continue;
}
if ($v != '') {
$parts[$k] = str_repeat(' ', $listLevel * 2 + 2) . $v;
}
}
$store .= implode("\n", $parts);
}
break;
default:
throw new Exception(
'Unsupported XML node type: ' . $reader->nodeType
);
}
}
return $rst;
}
/**
* 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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