TODO List



= KEY ====================

    # Flagship

    - Regular

    ? Maybe I'll Do It

==========================



If no interest is expressed for a feature that may require a considerable

amount of effort to implement, it may get endlessly delayed. Do not be

afraid to cast your vote for the next feature to be implemented!



- Built-in support for target="_blank" on all external links

- Incorporate data: support as implemented here:

  http://htmlpurifier.org/phorum/read.php?3,3491,3548

- Fix ImgRequired to handle data correctly

- Incorporate download and resize support as implemented here:

  http://htmlpurifier.org/phorum/read.php?3,2795,3628

- Think about allowing explicit order of operations hooks for transforms

- Add "register" field to config schemas to eliminate dependence on

  naming conventions

- Add examples to everything (make built-in which also automatically

  gives output)



FUTURE VERSIONS

---------------



4.1 release [It's All About Trust] (floating)

 # Implement untrusted, dangerous elements/attributes

 # Implement IDREF support (harder than it seems, since you cannot have

   IDREFs to non-existent IDs)

     - Implement <area> (client and server side image maps are blocking

       on IDREF support)

 # Frameset XHTML 1.0 and HTML 4.01 doctypes

 - Figure out how to simultaneously set %CSS.Trusted and %HTML.Trusted (?)



4.2 release [Error'ed]

 # Error logging for filtering/cleanup procedures

 - XSS-attempt detection--certain errors are flagged XSS-like



4.3 release [Do What I Mean, Not What I Say]

 # Additional support for poorly written HTML

    - Microsoft Word HTML cleaning (i.e. MsoNormal, but research essential!)

    - Friendly strict handling of <address> (block -> <br>)

 ? Remove redundant tags, ex. <u><u>Underlined</u></u>. Implementation notes:

    1. Analyzing which tags to remove duplicants

    2. Ensure attributes are merged into the parent tag

    3. Extend the tag exclusion system to specify whether or not the

    contents should be dropped or not (currently, there's code that could do

    something like this if it didn't drop the inner text too.)

 - Remove <span> tags that don't do anything (no attributes)

 - Append something to duplicate IDs so they're still usable (impl. note: the

   dupe detector would also need to detect the suffix as well)

 - Externalize inline CSS to promote clean HTML, proposed by Sander Tekelenburg



5.0 release [Beyond HTML]

 # Legit token based CSS parsing (will require revamping almost every

   AttrDef class). Probably will use CSSTidy class?

 # More control over allowed CSS properties using a modularization

 # HTML 5 support

 # IRI support (this includes IDN)

 - Standardize token armor for all areas of processing

 - Convert RTL/LTR override characters to <bdo> tags, or vice versa on demand.

   Also, enable disabling of directionality



6.0 release [To XML and Beyond]

 - Extended HTML capabilities based on namespacing and tag transforms (COMPLEX)

    - Hooks for adding custom processors to custom namespaced tags and

      attributes, offer default implementation

    - Lots of documentation and samples



Ongoing

 - More refactoring to take advantage of PHP5's facilities

 - Refactor unit tests into lots of test methods

 - Plugins for major CMSes (COMPLEX)

    - phpBB

    - Drupal needs loving!

    - Phorum need loving!

    - more! (look for ones that use WYSIWYGs)

    - Also, maybe a FAQ for extension writers with HTML Purifier



AutoFormat

 - Smileys

 - Syntax highlighting (with GeSHi) with <pre> and possibly <?php

 - Look at http://drupal.org/project/Modules/category/63 for ideas



Optimizations

 - Reduce size of internal data-structures (esp. HTMLDefinition)

 - Get PH5P working with the latest versions of DOM, which have much more

   stringent error checking procedures. Maybe convert straight to tokens.

 - Get rid of set_include_path(). Save this for another major release.



Neat feature related

 ! Factor demo.php into a set of Printer classes, and then create a stub

   file for users here (inside the actual HTML Purifier library)

 ! Support exporting configuration, so users can easily tweak settings

   in the demo, and then copy-paste into their own setup

 - Advanced URI filtering schemes (see docs/proposal-new-directives.txt)

 - Allow scoped="scoped" attribute in <style> tags; may be troublesome

   because regular CSS has no way of uniquely identifying nodes, so we'd

   have to generate IDs

 - Explain how to use HTML Purifier in non-PHP languages / create

   a simple command line stub (or complicated?)

 - Fixes for Firefox's inability to handle COL alignment props (Bug 915)

 - Automatically add non-breaking spaces to empty table cells when

   empty-cells:show is applied to have compatibility with Internet Explorer

 - Table of Contents generation (XHTML Compiler might be reusable). May also

   be out-of-band information.

 - Full set of color keywords. Also, a way to add onto them without

   finalizing the configuration object.

 - Write a var_export and memcached DefinitionCache - Denis



Maintenance related (slightly boring)

 # CHMOD install script for PEAR installs

 ! Factor out command line parser into its own class, and unit test it

 - Allow merging configurations.  Thus,

        a -> b -> default

        c -> d -> default

   becomes

        a -> b -> c -> d -> default

   Maybe allow more fine-grained tuning of this behavior. Alternatively,

   encourage people to use short plist depths before building them up.

 - Time PHPT tests



ChildDef related (very boring)

 - Abstract ChildDef_BlockQuote to work with all elements that only

   allow blocks in them, required or optional

 - Implement lenient <ruby> child validation



Wontfix

 - Non-lossy smart alternate character encoding transformations (unless

   patch provided)

 - Pretty-printing HTML: users can use Tidy on the output on entire page

 - Native content compression, whitespace stripping: use gzip if this is

   really important



    vim: et sw=4 sts=4