CSS Parser A simple CSS parser
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CSS Parser Ranking & Summary

CSS Parser Tags

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CSS Parser Description

A parser is a working piece of software that 'knows' how to recognize a set of language rules. While in the process of recognizing a language, a parser usually acts on the information recognized. A parser doesn't have to act on the information, but it wouldn't be very interesting if all it did was say "yep, that's my language all right..." Some parsers build an object graph as they parse. Some call methods on another piece of software passing them parameters from the language. And some parsers just fire events as parts are recognized. With Coco, you are free to use any of these methods through attributed code. The beauty of tools like Coco is that you only need to specify your language in a format they recognize (the grammar), and they produce the parser for you.Parsers usually don't work alone. Most parsers require a scanner (sometimes called a lexer or tokenizer) to supply them with lexical chunks or tokens. When a parser starts, it asks the scanner for the first token, which it checks against its rules to determine if that token was expected. If the token does fit a rule, it uses it to determine what should be expected next.This demo application was developed to be a very simple CSS parser. Selecting "Open CSS" from the "File" menu allows you to browse for a CSS file. Once opened, it automatically uses the Coco generated parser to parse the CSS file, building a CSSDocument object, which it then displays in the TreeView. The "File" menu has a "Parse Text" option that opens a dialog window that you can enter CSS snippets to parse, and a "View Tokens" menu option that does just what it says. There is also a "CSS" menu with two options: "View CSS" and "View HTML". "View CSS" renders the model back to CSS text, which was handy for me for verifying the parser's recognition and the model's representation. "View HTML" does basically the same thing, but adds markup with SPAN tags so you can style it however you wish.

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