+<?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\Lib\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
+{
+ 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';
+ }
+
+ /**
+ * Re-arranges the XML of formatted links to that clean link tags can
+ * be generated.
+ *
+ * Tomboy 1.15.2 allows link formatting, and the resulting XML is a
+ * mess of multiple(!) link tags that are within or around other formatting
+ * tags.
+ *
+ * This method tries to re-arrange the links so that only a single link tag
+ * appears with all the formatting inside.
+ *
+ * @param string $xmlContent Tomboy note content
+ *
+ * @return string XML content, with re-arranged link tags.
+ */
+ protected function fixNastyLinks($xmlContent)
+ {
+ preg_match_all(
+ '#(?:<.*>)?<link:internal>.+</link:internal><link:internal>.+</link:internal>#U',
+ $xmlContent,
+ $matches
+ );
+
+ foreach ($matches[0] as $nastyLink) {
+ $cleaner = str_replace('</link:internal><link:internal>', '', $nastyLink);
+ $cleaner = preg_replace('#<([a-z]+)><(link:internal)>#U', '<\2><\1>', $cleaner);
+ $cleaner = preg_replace('#</(link:internal)></([a-z]+)>#U', '</\2></\1>', $cleaner);
+ $cleaner = str_replace('</link:internal><link:internal>', '', $cleaner);
+ $xmlContent = str_replace($nastyLink, $cleaner, $xmlContent);
+ }
+
+ return $xmlContent;
+ }
+}
+?>
git.cweiske.de / grauphel.git / commitdiff