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/HTMLWrapper.cpp

@@ -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.
+ ****************************************************************/
+
+#include <string.h>
+
+#include "HTMLWrapper.h"
+#include <libxml/HTMLtree.h>
+
+HTMLWrapper::HTMLWrapper() : XMLWrapper()
+{
+}
+
+bool HTMLWrapper::readHTML(const char *html, const char *url)
+{
+	cleanup();
+
+	mDocument = htmlReadMemory(html, strlen(html), url, "", HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING/* | HTML_PARSE_COMPACT*/);
+	if (mDocument) {
+		return true;
+	}
+
+	return false;
+}
+
+bool HTMLWrapper::saveHTML(std::string &html)
+{
+	if (!mDocument) {
+		return false;
+	}
+
+	xmlChar *newHtml = NULL;
+	int newHtmlSize = 0;
+	htmlDocDumpMemoryFormat(mDocument, &newHtml, &newHtmlSize, 0);
+	if (newHtml) {
+		convertToString(newHtml, html);
+		xmlFree(newHtml);
+
+		return true;
+	}
+
+	return false;
+}