GtkSourceView

GtkSourceView is a GNOME library that extends GtkTextView, the standard GTK+ widget for multiline text editing. GtkSourceView adds support for syntax highlighting, undo/redo, file loading and saving, search and replace, a completion system, printing, displaying line numbers, and other features typical of a source code editor.

Features

Accurate syntax highlighting for most popular programming languages (C, C++, Java, C#, Fortran, etc.), scripting languages (sh, Python, Perl, Ruby, PHP, TCL, etc.), markup languages (XML, HTML, DocBook, LaTeX, etc.) and many others
Customizable visual style using style schemes
Unlimited Undo/Redo
File loading and saving
Extensible completion framework
Search and replace, with regex support
Line numbers
Line marks (useful for bookmarks, breakpoints, etc.)
Printing through easy integration with the GtkPrintOperation API
Highlight the current line
Highlight the matching bracket
Right margin
Represent whitespace characters with symbols
A minimap, which shows an overview of the text
Extended keyboard navigation (smart Home/End, smart backspace, auto indentation, line moving, etc.)
Can be used from many programming languages. Thanks to GObject Introspection, automatic bindings are available for JavaScript, Python, Vala and others. For C++, there is gtksourceviewmm.

Screenshots

Downloads

Documentation

Related Libraries

gspell - For spell-checking.
Tepl - Text editor product line, a library that eases the development of GtkSourceView-based text editors and IDEs.

Getting in Touch

IRC: the #gtksourceview channel on irc.gnome.org
Mailing list
Bugzilla product (no longer open for new bugs)
GitLab issues (before filing a new bug search also the bugzilla first)