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Zend Framework: Zend_Css Component Proposal

Table of Contents

1. Overview

Zend_Css will provide CSS interpretation, generation and validation. It will create a "DOM" from existing CSS code and may allow CSS3 style calculations and functions. It may also check existing CSS is valid and may present information about potential browser conflicts or issues. It may be able to output browser-specific code based on a combination of browser specific CSS files OR from browser specific commands in the special generation engine.

2. References

• Harry Houdini Wikipedia Entry
• MagicTricks.com

3. Component Requirements, Constraints, and Acceptance Criteria

Most requirements take the form of "foo will do ...." or "foo will not support ...", although different words and sentence structure might be used. Adding functionality to your proposal is requirements creep (bad), unless listed below. Discuss major changes with your team first, and then open a "feature improvement" issue against this component.

• This component will correctly reads a developers mind for intent and generate the right configuration file.
• The generated config file will not support XML, but will provide an extension point in the API.
• This component will use no more memory than twice the size of all data it contains.
• This component will include a factory method.
• This component will not allow subclassing. (i.e. when reviewed, we expect to see "final" keyword in code)
• This component will only generate data exports strictly complying with RFC 12345.
• This component will validate input data against formats supported by ZF component Foo.
• This component will not save any data using Zend_Cache or the filesystem. All transient data will be saved using Zend_Session.

4. Dependencies on Other Framework Components

• Zend_Exception

5. Theory of Operation

The component is instantiated with a mind-link that ...

6. Milestones / Tasks

Describe some intermediate state of this component in terms of design notes, additional material added to this page, and / code. Note any significant dependencies here, such as, "Milestone #3 can not be completed until feature Foo has been added to ZF component XYZ." Milestones will be required for acceptance of future proposals. They are not hard, and many times you will only need to think of the first three below.

• Milestone 1: design notes will be published here
• Milestone 2: Working prototype checked into the incubator supporting use cases #1, #2, ...
• Milestone 3: Working prototype checked into the incubator supporting use cases #3 and #4.
• Milestone 4: Unit tests exist, work, and are checked into SVN.
• Milestone 5: Initial documentation exists.

If a milestone is already done, begin the description with "[DONE]", like this:

• Milestone #: [DONE] Unit tests ...

7. Class Index

• Zend_Magic_Exception
• Zend_Magic (factory class)
• Zend_Magic_MindProbe
• Zend_Magic_MindProbe_Intent
• Zend_Magic_Action
• Zend_Magic_CodeGen

8. Use Cases

... (see good use cases book)

9. Class Skeletons