| ============== |
| CSS Minifier |
| ============== |
| |
| RCSSmin is a CSS minifier. |
| |
| The minifier is based on the semantics of the `YUI compressor`_\, which itself |
| is based on `the rule list by Isaac Schlueter`_\. |
| |
| This module is a re-implementation aiming for speed instead of maximum |
| compression, so it can be used at runtime (rather than during a preprocessing |
| step). RCSSmin does syntactical compression only (removing spaces, comments |
| and possibly semicolons). It does not provide semantic compression (like |
| removing empty blocks, collapsing redundant properties etc). It does, however, |
| support various CSS hacks (by keeping them working as intended). |
| |
| Here's a feature list: |
| |
| - Strings are kept, except that escaped newlines are stripped |
| - Space/Comments before the very end or before various characters are |
| stripped: ``:{});=>+],!`` (The colon (``:``) is a special case, a single |
| space is kept if it's outside a ruleset.) |
| - Space/Comments at the very beginning or after various characters are |
| stripped: ``{}(=:>+[,!`` |
| - Optional space after unicode escapes is kept, resp. replaced by a simple |
| space |
| - whitespaces inside ``url()`` definitions are stripped |
| - Comments starting with an exclamation mark (``!``) can be kept optionally. |
| - All other comments and/or whitespace characters are replaced by a single |
| space. |
| - Multiple consecutive semicolons are reduced to one |
| - The last semicolon within a ruleset is stripped |
| - CSS Hacks supported: |
| |
| - IE7 hack (``>/**/``) |
| - Mac-IE5 hack (``/*\*/.../**/``) |
| - The boxmodelhack is supported naturally because it relies on valid CSS2 |
| strings |
| - Between ``:first-line`` and the following comma or curly brace a space is |
| inserted. (apparently it's needed for IE6) |
| - Same for ``:first-letter`` |
| |
| rcssmin.c is a reimplementation of rcssmin.py in C and improves runtime up to |
| factor 100 or so (depending on the input). docs/BENCHMARKS in the source |
| distribution contains the details. |
| |
| Both python 2 (>= 2.4) and python 3 are supported. |
| |
| .. _YUI compressor: https://github.com/yui/yuicompressor/ |
| |
| .. _the rule list by Isaac Schlueter: https://github.com/isaacs/cssmin/ |
| |
| |
| Copyright and License |
| ~~~~~~~~~~~~~~~~~~~~~ |
| |
| Copyright 2011 - 2014 |
| André Malo or his licensors, as applicable. |
| |
| The whole package (except for the files in the bench/ directory) is |
| distributed under the Apache License Version 2.0. You'll find a copy in the |
| root directory of the distribution or online at: |
| <http://www.apache.org/licenses/LICENSE-2.0>. |
| |
| |
| Bugs |
| ~~~~ |
| |
| No bugs, of course. ;-) |
| But if you've found one or have an idea how to improve rcssmin, feel free |
| to send a pull request on `github <https://github.com/ndparker/rcssmin>`_ |
| or send a mail to <rcssmin-bugs@perlig.de>. |
| |
| |
| Author Information |
| ~~~~~~~~~~~~~~~~~~ |
| |
| André "nd" Malo <nd perlig.de> |
| GPG: 0x8103A37E |
| |
| |
| If God intended people to be naked, they would be born that way. |
| -- Oscar Wilde |
| |
| .. vim:tw=72 syntax=rest |