Fixes two problems in the current group chat:

- the parser fails to embed two links in the same sentence
- the parser can potentially put smileys in the middle of <a> tags

Solution:
Since the message is in HTML, it is parsed into a DOM tree, then that DOM tree
is traversed and only the text nodes are parsed (see HandleRichText.cpp for
details).

Bonus fixes:
- missing std:: for endl (which was falling back to its Qt counterpart)
- commenting useless code in PeersDialog::smileyWidgetgroupchat()
- replacing int by size_t
- RetroShare.pro now queries gpgme-config for its include path


git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@2888 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/chat/HandleRichText.h

@@ -0,0 +1,112 @@
+/****************************************************************
+ * This file is distributed under the following license:
+ *
+ * Copyright (c) 2010, Thomas Kister
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, 
+ *  Boston, MA  02110-1301, USA.
+ ****************************************************************/
+
+/**
+ * This file provides helper functions and functors for translating data from/to
+ * rich text format and HTML. Its main goal is to facilitate decoding of chat
+ * messages, particularly embedding special information into HTML tags.
+ */
+
+
+#ifndef HANDLE_RICH_TEXT_H_
+#define HANDLE_RICH_TEXT_H_
+
+
+#include <QRegExp>
+#include <QtXml>
+
+
+namespace RsChat {
+
+
+/**
+ * The type of embedding we'd like to do
+ */
+enum EmbeddedType
+{
+	Ahref,		///< into <a></a>
+	Img,		///< into <img/>
+};
+
+
+/**
+ * Base class for storing information about a given kind of embedding.
+ *
+ * Its only constructor is protected so it is impossible to instantiate it, and
+ * at the same time derived classes have to provide a type.
+ */
+class EmbedInHtml
+{
+protected:
+	EmbedInHtml(EmbeddedType newType) :
+		myType(newType)
+	{}
+
+public:
+	const EmbeddedType myType;
+	QRegExp myRE;
+};
+
+
+/**
+ * This class is used to store information for embedding links into <a></a> tags.
+ */
+class EmbedInHtmlAhref : public EmbedInHtml
+{
+public:
+	EmbedInHtmlAhref() :
+		EmbedInHtml(Ahref)
+	{
+		myRE.setPattern("(\\bretroshare://[^\\s]*)|(\\bhttps?://[^\\s]*)|(\\bwww\\.[^\\s]*)");
+	}
+};
+
+
+/** 
+  * This class is used to store information for embedding smileys into <img/> tags.
+  *
+  * By default the QRegExp the variables are empty, which means it must be
+  * filled at runtime, typically when the smileys set is loaded. It can be
+  * either done by hand or by using one of the helper methods available.
+  *
+  * Note: The QHash uses only *one* smiley per key (unlike soon-to-be-upgraded
+  * code out there).
+  */
+class EmbedInHtmlImg : public EmbedInHtml
+{
+public:
+	EmbedInHtmlImg() :
+		EmbedInHtml(Img)
+	{}
+
+	void InitFromAwkwardHash(const QHash<QString,QString>& hash);
+
+	QHash<QString,QString> smileys;
+};
+
+
+void embedHtml(QDomDocument& doc, QDomElement& currentElement, const EmbedInHtml& embedInfos);
+
+
+} // namespace RsChat
+
+
+#endif // HANDLE_RICH_TEXT_H_