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+
+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!
+
+Things to do as soon as possible:
+
+ - http://htmlpurifier.org/phorum/read.php?3,5560,6307#msg-6307
+ - Think about allowing explicit order of operations hooks for transforms
+ - Fix "<.<" bug (trailing < is removed if not EOD)
+ - Build in better internal state dumps and debugging tools for remote
+ debugging
+ - Allowed/Allowed* have strange interactions when both set
+ ? Transform lone embeds into object tags
+ - Deprecated config options that emit warnings when you set them (with'
+ a way of muting the warning if you really want to)
+ - Make HTML.Trusted work with Output.FlashCompat
+ - HTML.Trusted and HTML.SafeObject have funny interaction; general
+ problem is what to do when a module "supersedes" another
+ (see also tables and basic tables.) This is a little dicier
+ because HTML.SafeObject has some extra functionality that
+ trusted might find useful. See http://htmlpurifier.org/phorum/read.php?3,5762,6100
+
+FUTURE VERSIONS
+---------------
+
+4.9 release [OMG CONFIG PONIES]
+ ! Fix Printer. It's from the old days when we didn't have decent XML classes
+ ! Factor demo.php into a set of Printer classes, and then create a stub
+ file for users here (inside the actual HTML Purifier library)
+ - Fix error handling with form construction
+ - Do encoding validation in Printers, or at least, where user data comes in
+ - Config: Add examples to everything (make built-in which also automatically
+ gives output)
+ - Add "register" field to config schemas to eliminate dependence on
+ naming conventions (try to remember why we ultimately decided on tihs)
+
+5.0 release [HTML 5]
+ # Swap out code to use html5lib tokenizer and tree-builder
+ ! Allow turning off of FixNesting and required attribute insertion
+
+5.1 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 (?)
+
+5.2 release [Error'ed]
+ # Error logging for filtering/cleanup procedures
+ # Additional support for poorly written HTML
+ - Microsoft Word HTML cleaning (i.e. MsoNormal, but research essential!)
+ - Friendly strict handling of <address> (block -> <br>)
+ - XSS-attempt detection--certain errors are flagged XSS-like
+ - Append something to duplicate IDs so they're still usable (impl. note: the
+ dupe detector would also need to detect the suffix as well)
+
+6.0 release [Beyond HTML]
+ # Legit token based CSS parsing (will require revamping almost every
+ AttrDef class). Probably will use CSSTidy
+ # More control over allowed CSS properties using a modularization
+ # IRI support (this includes IDN)
+ - Standardize token armor for all areas of processing
+
+7.0 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
+ - Also, 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
+
+Neat feature related
+ ! 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
+ - Built-in support for target="_blank" on all external links
+ - Convert RTL/LTR override characters to <bdo> tags, or vice versa on demand.
+ Also, enable disabling of directionality
+ ? Externalize inline CSS to promote clean HTML, proposed by Sander Tekelenburg
+ ? 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.)
+ ? Make AutoParagraph also support paragraph-izing double <br> tags, and not
+ just double newlines. This is kind of tough to do in the current framework,
+ though, and might be reasonably approximated by search replacing double <br>s
+ with newlines before running it through HTML Purifier.
+
+Maintenance related (slightly boring)
+ # CHMOD install script for PEAR installs
+ ! Factor out command line parser into its own class, and unit test it
+ - Reduce size of internal data-structures (esp. HTMLDefinition)
+ - 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