4 = KEY ====================
8 ==========================
10 If no interest is expressed for a feature that may require a considerable
11 amount of effort to implement, it may get endlessly delayed. Do not be
12 afraid to cast your vote for the next feature to be implemented!
14 - Investigate how early internal structures can be accessed; this would
15 prevent structures from being parsed and serialized multiple times.
16 - Built-in support for target="_blank" on all external links
17 - Incorporate data: support as implemented here:
18 http://htmlpurifier.org/phorum/read.php?3,3491,3548
19 - Fix ImgRequired to handle data correctly
20 - Think about allowing explicit order of operations hooks for transforms
21 - Allow more relaxed "class" definition than NMTOKENS for appropriate
27 4.1 release [It's All About Trust] (floating)
28 # Implement untrusted, dangerous elements/attributes
29 # Implement IDREF support (harder than it seems, since you cannot have
30 IDREFs to non-existent IDs)
31 # Frameset XHTML 1.0 and HTML 4.01 doctypes
33 - Figure out how to simultaneously set %CSS.Trusted and %HTML.Trusted (?)
35 4.2 release [Error'ed]
36 # Error logging for filtering/cleanup procedures
37 - XSS-attempt detection--certain errors are flagged XSS-like
39 4.3 release [Do What I Mean, Not What I Say]
40 # Additional support for poorly written HTML
41 - Microsoft Word HTML cleaning (i.e. MsoNormal, but research essential!)
42 - Friendly strict handling of <address> (block -> <br>)
43 ? Remove redundant tags, ex. <u><u>Underlined</u></u>. Implementation notes:
44 1. Analyzing which tags to remove duplicants
45 2. Ensure attributes are merged into the parent tag
46 3. Extend the tag exclusion system to specify whether or not the
47 contents should be dropped or not (currently, there's code that could do
48 something like this if it didn't drop the inner text too.)
49 - Remove <span> tags that don't do anything (no attributes)
50 - Append something to duplicate IDs so they're still usable (impl. note: the
51 dupe detector would also need to detect the suffix as well)
52 - Externalize inline CSS to promote clean HTML, proposed by Sander Tekelenburg
54 5.0 release [Beyond HTML]
55 # Legit token based CSS parsing (will require revamping almost every
56 AttrDef class). Probably will use CSSTidy class?
57 # More control over allowed CSS properties using a modularization
59 # IRI support (this includes IDN)
60 - Standardize token armor for all areas of processing
61 - Convert RTL/LTR override characters to <bdo> tags, or vice versa on demand.
62 Also, enable disabling of directionality
64 6.0 release [To XML and Beyond]
65 - Extended HTML capabilities based on namespacing and tag transforms (COMPLEX)
66 - Hooks for adding custom processors to custom namespaced tags and
67 attributes, offer default implementation
68 - Lots of documentation and samples
71 - More refactoring to take advantage of PHP5's facilities
72 - Refactor unit tests into lots of test methods
73 - Plugins for major CMSes (COMPLEX)
75 - Drupal needs loving!
77 - more! (look for ones that use WYSIWYGs)
78 - Also, maybe a FAQ for extension writers with HTML Purifier
82 - Syntax highlighting (with GeSHi) with <pre> and possibly <?php
83 - Look at http://drupal.org/project/Modules/category/63 for ideas
86 - Reduce size of internal data-structures (esp. HTMLDefinition)
87 - Research memory usage of objects versus arrays
88 - Combine multiple strategies into a single, single-pass strategy
89 - Get PH5P working with the latest versions of DOM, which have much more
90 stringent error checking procedures. Maybe convert straight to tokens.
91 - Get rid of set_include_path(). Save this for another major release.
94 ! Factor demo.php into a set of Printer classes, and then create a stub
95 file for users here (inside the actual HTML Purifier library)
96 ! Support exporting configuration, so users can easily tweak settings
97 in the demo, and then copy-paste into their own setup
98 - Advanced URI filtering schemes (see docs/proposal-new-directives.txt)
99 - Allow scoped="scoped" attribute in <style> tags; may be troublesome
100 because regular CSS has no way of uniquely identifying nodes, so we'd
102 - Explain how to use HTML Purifier in non-PHP languages / create
103 a simple command line stub (or complicated?)
104 - Fixes for Firefox's inability to handle COL alignment props (Bug 915)
105 - Automatically add non-breaking spaces to empty table cells when
106 empty-cells:show is applied to have compatibility with Internet Explorer
107 - Table of Contents generation (XHTML Compiler might be reusable). May also
108 be out-of-band information.
109 - Full set of color keywords. Also, a way to add onto them without
110 finalizing the configuration object.
111 - Write a var_export and memcached DefinitionCache - Denis
112 - Allow restriction of allowed class values
114 Maintenance related (slightly boring)
115 # CHMOD install script for PEAR installs
116 ! Factor out command line parser into its own class, and unit test it
117 ! Nested configuration namespaces
118 - Distinguish between default settings and explicitly set settings, so
119 configurations can be merged
122 ChildDef related (very boring)
123 - Abstract ChildDef_BlockQuote to work with all elements that only
124 allow blocks in them, required or optional
125 - Implement lenient <ruby> child validation
128 - Non-lossy smart alternate character encoding transformations (unless
130 - Pretty-printing HTML: users can use Tidy on the output on entire page
131 - Native content compression, whitespace stripping: use gzip if this is