Closure Web Browser

Closure is a web browser implemented in Common Lisp, implemented using the CLIM user interface toolkit (more precisely, the McCLIM implementation of CLIM 2, plus some direct-to-X abstraction violations).

Features:

• supports HTML-4 and CSS-1 plus the essential bits of CSS-2;
• supports HTTP 1.0 and 1.1, FTP and HTTPS (when using the Hutchentoot library);
• supports PNG, JPEG, GIF, XBM, XPM and TIFF image formats;
• antialiased text when used with McCLIM-Freetype;
• experimental TeX-like paragraph formatting and hyphenation support;
• simple navigation history support;
• can be extended in Common Lisp!

Some screenshots:

• Closure using mcclim-freetype on a weblog that uses clean CSS
• illustration of the hyphenation support

To check out the current version of the source code:

$ export CVSROOT=:pserver:anonymous@common-lisp.net:/project/closure/cvsroot
$ cvs login
Logging in to :pserver:anonymous@common-lisp.net:2401/project/closure/cvsroot
CVS password: anonymous
$ cvs co -P closure

Here is a quickstart guide to running Closure on SBCL on GNU/Linux.

Mailing lists

• the development mailing list is called closure-devel
• the CVS commits mailing list is called closure-cvs

TODO

1. Start splitting it into components, prime candidates for components are:
   • The rune abstraction.
   • Network protocol (HTTP and FTP).
   • Parsers (SGML, HTML, CSS).
   • Graphic file formats (PNM, GIF, PNG).
2. Use native McCLIM image support instead of CLX, so that other McCLIM backends (Postscript, GTk+) work
3. Implement new features, such as text entry boxes.

News

2006年12月29日

David Lichteblau has updated Closure to use the external CXML libary (an improved version of Closure's original XML parser). This should bring better standards compliance and easier maintenance.

2006年12月28日

Provisional support for loading GIF files without an external helper application, thanks to the Skippy library.

2005年08月25日

OpenMCL support has been added to Closure.

2005年07月13日

It's later than mid-April, but the current version of Closure runs in current SBCL and McCLIM, and is mostly robust against the vagaries of the big bad Internet.

2005年03月13日

Currently the code base has experienced some bit rot but we expect to get it running again with current SBCL and McCLIM by mid-April. Also we did a license change from the former GPL/LGPL mix to MIT-style in an attempt to make the code more useful for integration in other projects be it free projects, GPLed projects or even closed source projects.

2007年01月02日