Parse URLs in torrent description

src/misc.cpp

@@ -832,3 +832,63 @@ bool misc::removeEmptyFolder(const QString &dirpath)
   }
   return false;
 }
+
+QString misc::parseHtmlLinks(const QString &raw_text)
+{
+  QString result = raw_text;
+  QRegExp reURL("(\\s|^)"                                     //start with whitespace or beginning of line
+                "("
+                "("                                      //case 1 -- URL with scheme
+                "(http(s?))\\://"                    //start with scheme
+                "([a-zA-Z0-9_-]+\\.)+"               //  domainpart.  at least one of these must exist
+                "([a-zA-Z0-9\\?%=&/_\\.:#;-]+)"      //  everything to 1st non-URI char, must be at least one char after the previous dot (cannot use ".*" because it can be too greedy)
+                ")"
+                "|"
+                "("                                     //case 2a -- no scheme, contains common TLD  example.com
+                "([a-zA-Z0-9_-]+\\.)+"              //  domainpart.  at least one of these must exist
+                "(?="                               //  must be followed by TLD
+                "AERO|aero|"                  //N.B. assertions are non-capturing
+                "ARPA|arpa|"
+                "ASIA|asia|"
+                "BIZ|biz|"
+                "CAT|cat|"
+                "COM|com|"
+                "COOP|coop|"
+                "EDU|edu|"
+                "GOV|gov|"
+                "INFO|info|"
+                "INT|int|"
+                "JOBS|jobs|"
+                "MIL|mil|"
+                "MOBI|mobi|"
+                "MUSEUM|museum|"
+                "NAME|name|"
+                "NET|net|"
+                "ORG|org|"
+                "PRO|pro|"
+                "RO|ro|"
+                "RU|ru|"
+                "TEL|tel|"
+                "TRAVEL|travel"
+                ")"
+                "([a-zA-Z0-9\\?%=&/_\\.:#;-]+)"     //  everything to 1st non-URI char, must be at least one char after the previous dot (cannot use ".*" because it can be too greedy)
+                ")"
+                "|"
+                "("                                     // case 2b no scheme, no TLD, must have at least 2 aphanum strings plus uncommon TLD string  --> del.icio.us
+                "([a-zA-Z0-9_-]+\\.){2,}"           //2 or more domainpart.   --> del.icio.
+                "[a-zA-Z]{2,}"                      //one ab  (2 char or longer) --> us
+                "([a-zA-Z0-9\\?%=&/_\\.:#;-]*)"     // everything to 1st non-URI char, maybe nothing  in case of del.icio.us/path
+                ")"
+                ")"
+                );
+
+
+  // Capture links
+  result.replace(reURL, "\\1<a href=\"\\2\">\\2</a>");
+
+  // Capture links without scheme
+  QRegExp reNoScheme("<a\\s+href=\"(?!http(s?))([a-zA-Z0-9\\?%=&/_\\.-:#]+)\\s*\">");
+  result.replace(reNoScheme, "<a href=\"http://\\1\">");
+
+  return result;
+}

src/misc.h

@@ -123,6 +123,8 @@ public:
     return MyFile.remove();
   }
 
+  static QString parseHtmlLinks(const QString &raw_text);
+
   static bool removeEmptyFolder(const QString &dirpath);
 
   static quint64 computePathSize(QString path);

src/properties/propertieswidget.cpp

@@ -263,7 +263,7 @@ void PropertiesWidget::loadTorrentInfos(const QTorrentHandle &_h) {
       // Pieces size
       pieceSize_lbl->setText(misc::friendlyUnit(h.piece_length()));
       // Comment
-      comment_text->setHtml(h.comment());
+      comment_text->setHtml(misc::parseHtmlLinks(h.comment()));
       // URL seeds
       loadUrlSeeds();
       // List files in torrent