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https://github.com/ezyang/htmlpurifier.git
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fd384129bf
Prior to this commit, the name attribute was unilaterally removed, except for Strict doctypes or a heavy TidyLevel, when it was converted to an id attribute. As name is actually permitted in both HTML 4.01 Strict and XHTML 1.0 Strict, although deprecated, the more sensible default behavior is to allow it unless TidyLevel is heavy. Our implementation is slightly stricter than the specs, as name attributes are treated as first class IDs, disallowing <a name="foo" id="foo"> or duplicate names. The former should be treated as a special case, but that will be a separate commit. Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
132 lines
5.6 KiB
Plaintext
132 lines
5.6 KiB
Plaintext
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TODO List
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= KEY ====================
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# Flagship
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- Regular
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? Maybe I'll Do It
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==========================
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If no interest is expressed for a feature that may require a considerable
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amount of effort to implement, it may get endlessly delayed. Do not be
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afraid to cast your vote for the next feature to be implemented!
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- Investigate how early internal structures can be accessed; this would
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prevent structures from being parsed and serialized multiple times.
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- Built-in support for target="_blank" on all external links
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- Allow <a id="asdf" name="asdf'>
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FUTURE VERSIONS
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---------------
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3.2 release [It's All About Trust] (floating)
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# Implement untrusted, dangerous elements/attributes
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- Forms are especially wanted
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# Implement IDREF support (harder than it seems, since you cannot have
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IDREFs to non-existent IDs)
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# Frameset XHTML 1.0 and HTML 4.01 doctypes
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- Implement <area>
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- Figure out how to simultaneously set %CSS.Trusted and %HTML.Trusted (?)
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3.3 release [Error'ed]
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# Error logging for filtering/cleanup procedures
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- XSS-attempt detection--certain errors are flagged XSS-like
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3.4 release [Do What I Mean, Not What I Say]
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# Additional support for poorly written HTML
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- Microsoft Word HTML cleaning (i.e. MsoNormal, but research essential!)
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- Friendly strict handling of <address> (block -> <br>)
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? Remove redundant tags, ex. <u><u>Underlined</u></u>. Implementation notes:
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1. Analyzing which tags to remove duplicants
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2. Ensure attributes are merged into the parent tag
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3. Extend the tag exclusion system to specify whether or not the
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contents should be dropped or not (currently, there's code that could do
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something like this if it didn't drop the inner text too.)
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- Remove <span> tags that don't do anything (no attributes)
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- Remove empty inline tags<i></i>
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- Append something to duplicate IDs so they're still usable (impl. note: the
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dupe detector would also need to detect the suffix as well)
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- Externalize inline CSS to promote clean HTML, proposed by Sander Tekelenburg
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4.0 release [Beyond HTML]
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# Legit token based CSS parsing (will require revamping almost every
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AttrDef class). Probably will use CSSTidy class?
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# More control over allowed CSS properties using a modularization
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# HTML 5 support
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# IRI support
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- Standardize token armor for all areas of processing
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- Convert RTL/LTR override characters to <bdo> tags, or vice versa on demand.
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Also, enable disabling of directionality
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5.0 release [To XML and Beyond]
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- AllowedAttributes and ForbiddenAttributes step on the toes of XML by
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using periods; this needs to be changed.
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- Extended HTML capabilities based on namespacing and tag transforms (COMPLEX)
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- Hooks for adding custom processors to custom namespaced tags and
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attributes, offer default implementation
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- Lots of documentation and samples
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Ongoing
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- More refactoring to take advantage of PHP5's facilities
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- Refactor unit tests into lots of test methods
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- Plugins for major CMSes (COMPLEX)
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- phpBB
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- Drupal needs loving!
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- Phorum need loving!
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- more! (look for ones that use WYSIWYGs)
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- Also, maybe a FAQ for extension writers with HTML Purifier
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AutoFormat
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- Smileys
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- Syntax highlighting (with GeSHi) with <pre> and possibly <?php
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- Look at http://drupal.org/project/Modules/category/63 for ideas
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Optimizations
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- Reduce size of internal data-structures (esp. HTMLDefinition)
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- Research memory usage of objects versus arrays
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- Combine multiple strategies into a single, single-pass strategy
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- Get PH5P working with the latest versions of DOM, which have much more
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stringent error checking procedures. Maybe convert straight to tokens.
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- Get rid of set_include_path(). Save this for another major release.
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Neat feature related
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! Factor demo.php into a set of Printer classes, and then create a stub
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file for users here (inside the actual HTML Purifier library)
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! Support exporting configuration, so users can easily tweak settings
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in the demo, and then copy-paste into their own setup
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- Advanced URI filtering schemes (see docs/proposal-new-directives.txt)
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- Allow scoped="scoped" attribute in <style> tags; may be troublesome
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because regular CSS has no way of uniquely identifying nodes, so we'd
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have to generate IDs
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- Explain how to use HTML Purifier in non-PHP languages / create
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a simple command line stub (or complicated?)
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- Fixes for Firefox's inability to handle COL alignment props (Bug 915)
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- Automatically add non-breaking spaces to empty table cells when
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empty-cells:show is applied to have compatibility with Internet Explorer
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- Table of Contents generation (XHTML Compiler might be reusable). May also
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be out-of-band information.
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- Full set of color keywords. Also, a way to add onto them without
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finalizing the configuration object.
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- Write a var_export and memcached DefinitionCache - Denis
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- Allow restriction of allowed class values
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Maintenance related (slightly boring)
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# CHMOD install script for PEAR installs
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! Factor out command line parser into its own class, and unit test it
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! Nested configuration namespaces
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- Distinguish between default settings and explicitly set settings, so
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configurations can be merged
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- Time PHPT tests
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ChildDef related (very boring)
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- Abstract ChildDef_BlockQuote to work with all elements that only
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allow blocks in them, required or optional
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- Implement lenient <ruby> child validation
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Wontfix
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- Non-lossy smart alternate character encoding transformations (unless
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patch provided)
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- Pretty-printing HTML: users can use Tidy on the output on entire page
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- Native content compression, whitespace stripping: use gzip if this is
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really important
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