FeedReader plugin:

- added new classes for XML/HTML parse and modify
- added basic error handling
- added new GUI for a preview and a tree to show the structure of the page (will be continued)

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5412 b45a01b8-16f6-495d-af2f-9b41ad6348cc

plugins/FeedReader/util/XMLWrapper.h

@@ -0,0 +1,60 @@
+/****************************************************************
+ *  RetroShare GUI is distributed under the following license:
+ *
+ *  Copyright (C) 2012 by Thunder
+ *
+ *  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.
+ ****************************************************************/
+
+#ifndef XMLWRAPPER
+#define XMLWRAPPER
+
+#include <string>
+#include <libxml/parser.h>
+
+class XMLWrapper
+{
+public:
+	XMLWrapper();
+	~XMLWrapper();
+
+	void cleanup();
+
+	bool readXML(const char *xml);
+
+	std::string nodeName(xmlNodePtr node);
+	std::string attrName(xmlAttrPtr attr);
+
+	xmlNodePtr findNode(xmlNodePtr node, const char *name, bool children = false);
+	bool getChildText(xmlNodePtr node, const char *childName, std::string &text);
+
+	bool getContent(xmlNodePtr node, std::string &content);
+
+	std::string getAttr(xmlNodePtr node, xmlAttrPtr attr);
+	std::string getAttr(xmlNodePtr node, const char *name);
+	bool setAttr(xmlNodePtr node, const char *name, const char *value);
+
+	xmlNodePtr getRootElement();
+
+protected:
+	xmlDocPtr mDocument;
+	xmlCharEncodingHandlerPtr mCharEncodingHandler;
+
+	bool convertToString(const xmlChar *xmlText, std::string &text);
+	bool convertFromString(const char *text, xmlChar *&xmlText);
+};
+
+#endif