adding a tool for external tools, for switch onto .c and .h files

plugins/externaltools/data/Makefile.am

@@ -7,7 +7,8 @@ tools_in_files = \
 tools_in_linux = \
 	open-terminal-here.tool.in \
 	run-command.tool.in \
-	search-recursive.tool.in
+	search-recursive.tool.in \
+	switch-c.desktop.tool.in
 
 tools_in_osx = \
 	open-terminal-here-osx.tool.in

plugins/externaltools/data/switch-c.desktop.in

@@ -0,0 +1,7 @@
+[Pluma Tool]
+_Name=Switch onto a file .c and .h
+Shortcut=<Shift><Alt>s
+Applicability=all
+Output=nothing
+Input=nothing
+Save-files=nothing

plugins/externaltools/data/switch-c.tool.in

@@ -0,0 +1,25 @@
+#!/usr/bin/python
+# Copyright © 2011 Perberos
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by the
+# Free Software Foundation; either version 2.1 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 Lesser
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser 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.
+
+import os
+
+name = os.environ["PLUMA_CURRENT_DOCUMENT_NAME"]
+
+if name.endswith('.c'):
+	os.system("pluma %s.h" % ".".join(name.split('.')[:-1]))
+if name.endswith('.h'):
+	os.system("pluma %s.c" % ".".join(name.split('.')[:-1]))