It's a text widget that extends the standard Gtk+ 2.x GtkTextView. It improves it by implementing syntax highlighting and other

features typical of a source editor.

It's currently being used by gedit, MonoDevelop and other projects like DiaSCE2 and Glimmer.

Requirements
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* GLib and GTK+ 2.2.0 or later
* LibXML2 2.5.0 or later
* libgnomeprint 2.2.0 or later