more filter conversion to python: svg and xml. Get rid of rclnull

--HG--
branch : WINDOWSPORT

src/internfile/mh_null.h

@@ -0,0 +1,59 @@
+/* Copyright (C) 2004 J.F.Dockes
+ *   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.,
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef _MH_NULL_H_INCLUDED_
+#define _MH_NULL_H_INCLUDED_
+
+// It may make sense in some cases to set this null filter (no output)
+// instead of using recoll_noindex or leaving the default filter in
+// case one doesn't want to install it: this will avoid endless retries
+// to reindex the affected files, as recoll will think it has succeeded
+// indexing them. Downside: the files won't be indexed when one
+// actually installs the real filter, will need a -z
+// Actually used for empty files
+// Associated to application/x-zerosize, so use 
+// <mimetype> = internal application/x-zerosize
+// in mimeconf
+#include <string>
+#include "cstr.h"
+#include "mimehandler.h"
+
+class MimeHandlerNull : public RecollFilter {
+ public:
+    MimeHandlerNull(RclConfig *cnf, const std::string& id) 
+	: RecollFilter(cnf, id) 
+    {
+    }
+    virtual ~MimeHandlerNull() 
+    {
+    }
+    virtual bool set_document_file(const string& mt, const string& fn) 
+    {
+	RecollFilter::set_document_file(mt, fn);
+	return m_havedoc = true;
+    }
+    virtual bool next_document() 
+    {
+	if (m_havedoc == false)
+	    return false;
+	m_havedoc = false; 
+	m_metaData[cstr_dj_keycontent] = cstr_null;
+	m_metaData[cstr_dj_keymt] = cstr_textplain;
+	return true;
+    }
+};
+
+#endif /* _MH_NULL_H_INCLUDED_ */

src/internfile/mimehandler.cpp

@@ -39,6 +39,7 @@ using namespace std;
 #include "mh_text.h"
 #include "mh_symlink.h"
 #include "mh_unknown.h"
+#include "mh_null.h"
 #include "ptmutex.h"
 
 // Performance help: we use a pool of already known and created
@@ -162,6 +163,10 @@ static RecollFilter *mhFactory(RclConfig *config, const string &mime,
 	LOGDEB2(("mhFactory(%s): ret MimeHandlerSymlink\n", mime.c_str()));
 	MD5String("MimeHandlerSymlink", id);
 	return nobuild ? 0 : new MimeHandlerSymlink(config, id);
+    } else if ("application/x-zerosize" == lmime) {
+	LOGDEB(("mhFactory(%s): ret MimeHandlerNull\n", mime.c_str()));
+	MD5String("MimeHandlerNull", id);
+	return nobuild ? 0 : new MimeHandlerNull(config, id);
     } else if (lmime.find("text/") == 0) {
         // Try to handle unknown text/xx as text/plain. This
         // only happen if the text/xx was defined as "internal" in