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Zend Framework: Zend_Filter_Minify_Css Component Proposal

Table of Contents

1. Overview

Zend_Filter_Minify_Css is a filter to reduce the size of CSS strings and files, resulting in faster client downloads

2. References

3. Component Requirements, Constraints, and Acceptance Criteria

• This component will minify Css code.
• This component will implement Zend_Filter_Interface
• This component will generate valid Css code
• This component will provide an adapter system for implementing different minification solutions
• This component will provide options for control of minification (such as opting not to remove comments, for example)

4. Dependencies on Other Framework Components

• Zend_Filter_Exception
• Zend_Filter

5. Theory of Operation

Minifying Css leads to faster load times on the client by reducing the overall size of Css code. This component aims to perform the work of removing comments, extra whitespace, etc while retaining the familiar Zend_Filter interface.

This component can be integrated into other framework components, such as HeadStyle view helper for automatic Css minification.

The component is used like any other Zend_Filter_* component, passing the string to be minified to the filter() method.

6. Milestones / Tasks

• Milestone 1: design notes will be published here
• Milestone 2: Working prototype checked into the incubator supporting minification of Css strings
• Milestone 3: Unit tests exist, work, and are checked into SVN.
• Milestone 4: Initial documentation exists.

7. Class Index

• Zend_Filter_Minify_Exception
• Zend_Filter_Minify_Css
• Zend_Filter_Minify_Interface
• Zend_Filter_Minify_Css_RegEx

8. Use Cases

9. Class Skeletons