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751 Commits

Author SHA1 Message Date
Edward Z. Yang
cf44f399f8 Properly use HMAC for secure munging. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-09-13 21:16:50 -07:00
Marcus Bointon
fac747bdbd PSR-2 reformatting PHPDoc corrections 
With minor corrections.

Signed-off-by: Marcus Bointon <marcus@synchromedia.co.uk>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-08-17 22:27:26 -04:00
Edward Z. Yang
53c2907706 New directive %Core.AllowHostnameUnderscore 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-07-26 21:33:39 -07:00
Edward Z. Yang
75bd7abcc7 Make list nesting test more sensitive. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-06-06 13:08:13 -07:00
Edward Z. Yang
0680832d41 Use info_parent_def to get parent information, since it may not be present in info array. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-05-21 17:19:59 -07:00
Edward Z. Yang
6e37ecd1c8 Make URI parsing algorithm more strict. 
Thanks Michael Gusev <mgusev@sugarcrm.com> for contributing this patch.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-04-16 13:56:43 -07:00
Edward Z. Yang
631021733b Add %Core.DisableExcludes directive 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-02-17 15:47:38 -08:00
Edward Z. Yang
c0ad68108a Do checks against iconvAvailable because PHP 5.4 has botched iconv support. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-10-27 02:27:57 -07:00
Edward Z. Yang
72db575446 Fix bug with non-lower case color names in HTML. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-07-30 10:54:32 -04:00
Edward Z. Yang
f38fca32a9 Don't lower-case components of background. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-06-02 11:22:58 -04:00
Edward Z. Yang
6705140082 Fix in AttrTransform_Nofollow 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-05-14 23:07:27 -04:00
Edward Z. Yang
2189a9430f Support for safe external scripts via explicit whitelist. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-04-27 17:44:49 -04:00
Edward Z. Yang
7291f19347 Fix problem where stacked AttrTransforms clobber each other. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-03-16 23:12:16 -04:00
Edward Z. Yang
31dce298ea Actually make URI.DisableResources do something. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-03-02 13:25:00 -05:00
Edward Z. Yang
8c9d461a62 Bugfix: _blank not blank. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-02-18 11:28:01 -05:00
Edward Z. Yang
70028f83d6 Make all of the tests work on all PHP versions. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-18 18:57:13 -05:00
Edward Z. Yang
5c5e3fe79f Avoid doing stupidly clever reflection tricks that make old PHP versions sad. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-18 18:21:36 -05:00
Edward Z. Yang
56a26cab14 Modernize some of the testing facilities. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-18 18:10:16 -05:00
Edward Z. Yang
1c7fedff5a Tighter CSS selector validation. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-17 15:36:26 -05:00
Edward Z. Yang
974fe3f25e Optional support for IDNAs with PEAR Net_IDNA2 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-06 05:28:00 -08:00
Edward Z. Yang
94468f3c24 Remove PEARSax3 lexer. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-03 20:40:17 +08:00
Edward Z. Yang
e0354fecd9 Make forms work for transitional doctypes. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-30 22:56:44 +08:00
Edward Z. Yang
d2de8d976a Add test for invalid SafeIframe usage. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 21:52:55 +08:00
Bradley M. Froehle
4164b2eb2b Implement Iframe module, and provide %HTML.SafeIframe and %URI.SafeIframeRegexp for untrusted usage. 
The purpose of this addition is twofold. In trusted mode, iframes are
now unconditionally allowed.

However, many online video providers (YouTube, Vimeo) and other web
applications (Google Maps, Google Calendar, etc) provide embed code in
iframe format, which is useful functionality in untrusted mode.
You can specify iframes as trusted elements with %HTML.SafeIframe;
however, you need to additionally specify a whitelist mechanism such as
%URI.SafeIframeRegexp to say what iframe embeds are OK (by default
everything is rejected).

Note: As iframes are invalid in strict doctypes, you will not be able to
use them there.

We also added an always_load parameter to URIFilters in order to support
the strange nature of the SafeIframe URIFilter (it always needs to be
loaded, due to the inability of accessing the %HTML.SafeIframe directive
to see if it's needed!)  We expect this URIFilter can expand in the future
to offer more complex validation mechanisms.

Signed-off-by: Bradley M. Froehle <brad.froehle@gmail.com>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 21:50:53 +08:00
Edward Z. Yang
6b643ede02 Implement %HTML.AllowedComments and %HTML.AllowedCommentsRegexp 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 15:34:42 +08:00
Edward Z. Yang
e41af46a8b Fix broken table content model, easily seen in XHTML1.1 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 14:49:26 +08:00
Edward Z. Yang
3570c9985a Properly handle nested sublists by folding into previous list item. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 14:00:34 +08:00
Edward Z. Yang
8d572993b4 Implement %HTML.TargetBlank 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 08:36:00 +08:00
Edward Z. Yang
9b10515fa4 Core.EscapeNonASCIICharacters now always works, even if target is UTF-8. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-25 23:31:15 +08:00
Edward Z. Yang
d45e11cc6b Add one more test for SPL autoload defaults. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-25 02:58:51 -05:00
Edward Z. Yang
94c15d1f56 Fix iconv truncation bug. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-25 02:31:06 -05:00
Edward Z. Yang
820d6e9097 Do not duplicate nofollow attribute in transform. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-08-24 09:56:13 -04:00
Edward Z. Yang
bcfbb8338c URI.Munge munges https to http URIs. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-04-10 13:09:24 +01:00
Edward Z. Yang
0124605918 Fix CSS URL innerHTML/cssText escaping bug. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-27 21:24:32 +01:00
Edward Z. Yang
afb007d22f Protect against font family innerHTML/cssText attacks. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-27 20:35:43 +01:00
Edward Z. Yang
0dd9e4faf4 Fix Internet Explorer innerHTML bug. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-27 11:50:52 +01:00
Edward Z. Yang
94ed3b1231 Implement CSS.AllowedFonts. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-24 22:54:39 +00:00
Edward Z. Yang
6a6c0ed5d7 Don't autoclose if no parents support the tag. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-22 00:26:41 +00:00
Edward Z. Yang
e05b555448 Safety update for nested ul test. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-21 21:05:23 +00:00
Edward Z. Yang
ee9c70ab7f Fix E_NOTICE from indexing into empty string. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-17 17:33:11 +00:00
Edward Z. Yang
e76f4b45d0 Dramatically rewrite null host URI handling. 
Basically, browsers don't parse what should be valid URIs correctly, so
we have to go through some backbends to accomodate them.  Specifically,
for browseable URIs, the following URIs have unintended behavior:

    - ///example.com
    - http:/example.com
    - http:///example.com

Furthermore, if the path begins with //, modifying these URLs must
be done with care, as if you remove the host-name component, the
parse tree changes.

I've modified the engine to follow correct URI semantics as much
as possible while outputting browser compatible code, and invalidate
the URI in cases where we can't deal.  There has been a refactoring
of URIScheme so that this important check is always performed,
introducing a new member variable allow_empty_host which is true
on data, file, mailto and news schemes.

This also fixes bypass bugs on URI.Munge.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-01-25 18:56:46 +00:00
Edward Z. Yang
a32d5b52e1 Fix embedding flash on non-IE browsers and allow more wmode. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-01-22 12:28:57 +00:00
Petr Skoda
78c4e62245 Add new Cache.SerializerPermissions option. 2011-01-13 22:57:40 +00:00
Edward Z. Yang
5803c06765 Check that argv is set before operating on it. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-01-13 22:42:47 +00:00
Edward Z. Yang
f3d050c517 Fix two bugs with caching of customized raw definitions. 
The first bug is that we will repeatedly write out the result
of a customized raw definition to the filesystem, even when a cache
entry already exists.

The second bug is that caching these definitions doesn't actually
work (the cache entry is written but never used.)  A new API
for retrieving raw definitions permits the user to take advantage
of caching.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-12-30 23:51:53 +00:00
Edward Z. Yang
cfc4ee1faf Add initial implementation of CSS.Trusted. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-11-12 18:45:03 +00:00
Edward Z. Yang
598c5b60c9 Add sanity check against ze1_compatibility_mode. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-11-12 16:15:03 +00:00
Edward Z. Yang
c9e7ffc172 Fix incorrect PEARSax3 test assertion. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-11-12 16:06:34 +00:00
Edward Z. Yang
4754d407aa Fix removal of id with DirectLex by preserving armor. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-10-28 17:25:31 +01:00
Nick Pope
0b9db1f54b Allow non-static autoload methods w/ PHP >= 5.2.11 
HTML Purifier loads itself as the first autoload function by
unregistering all existing functions and re-registering them after
registering itself.

Originally an exception was thrown when a non-static object method was
encountered as the behaviour of spl_autoload_functions() did not return
the object instance, but only the class name.  This was filed on PHP
bugs (#44144).

The bug was fixed for PHP >= 5.2.11 and >= 5.3

Signed-off-by: Nick Pope <nick@nickpope.me.uk>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-10-28 17:25:17 +01:00
Edward Z. Yang
8c80349f9d Implement HTML.Nofollow for external links. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-28 12:01:57 -04:00
Edward Z. Yang
d848c99b74 Make IE conditional comment matching ungreedy. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-28 10:22:38 -04:00
Edward Z. Yang
86990a21f1 Rename newline normalization directive to something better. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-15 02:50:39 -04:00
Tomasz Muras
9573f0933d Make newline normalization optional. 2010-09-14 23:49:28 -04:00
Edward Z. Yang
ec86598446 Add support for file:// URI scheme. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-09 00:01:26 -04:00
Edward Z. Yang
7c91104532 Implement HTML.FlashAllowFullScreen. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-08 23:39:20 -04:00
Edward Z. Yang
eac628f490 Add %CSS.ForbiddenProperties directive. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-04 02:59:03 -04:00
Edward Z. Yang
479d793562 Reword documentation to be clearer, and give warning on common user error. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-04 01:31:20 -04:00
Edward Z. Yang
c04a441b3e Actually make URI.DisableResources do something. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-06-30 05:59:17 -07:00
Edward Z. Yang
1bed8b6d5f Added %Core.RemoveProcessingInstructions. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-06-20 18:26:44 -07:00
Edward Z. Yang
33afd7d9e0 Fix improper handling of IE conditional comments. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-06-18 06:08:54 -07:00
Edward Z. Yang
00c66fa9cb Fix bug in parsing single attribute with entities. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-31 19:44:18 -07:00
Edward Z. Yang
d3abcb90e3 Rewrite CSS url() and font-family output logic. 
The new logic is as follows:

* Given a URL to insert into url(), check that it is properly URL
  encoded (in particular, a doublequote and backslash never occurs
  within it) and then place it as url("http://example.com").

* Given a font name, if it is strictly alphanumeric, it is safe to omit
  quotes. Otherwise, wrap in double quotes and replace '"' with '\22 '
  (note trailing space) and '\' with '\5C ' (ditto).

We introduce expandCSSEscape() which is a hack for common parsing
idioms in CSS; this means that CSS escapes are now recognized inside
URLs as well as unquoted font names.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-31 18:45:21 -07:00
Edward Z. Yang
df3100b1b3 Make test script less chatty when log_errors is on. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-20 21:50:44 -04:00
Edward Z. Yang
143e1ad718 Remove shebang and +x from test script. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-20 21:21:26 -04:00
Edward Z. Yang
875b0febde Fix infinite loop involving wrapping formedness. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-17 23:22:51 -04:00
Edward Z. Yang
3166b8a10f Fix bug in background-position with center keyword. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-05 15:08:57 -04:00
Edward Z. Yang
1a70bffd5a Emit errors when body is extracted. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-05-04 13:41:09 -04:00
Edward Z. Yang
c1cbd9e565 Mute STRICT errors from CSSTidy and don't run PEARSax3 on PHP 5.3. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-04-26 18:27:32 -04:00
Edward Z. Yang
da94d3d6ac Always quote the contents of url() in CSS. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-04-26 12:10:15 -04:00
Edward Z. Yang
70a7a3f5dd Handle <ol><ol> properly by adding missing <li> tag. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-10 00:58:37 -05:00
Edward Z. Yang
dc90e8e85b Support flashvars. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-08 01:16:57 -05:00
Edward Z. Yang
97125ed18b Implement data URI scheme. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-07 21:45:39 -05:00
Paul Stone
9a9036c689 Implement auto-formatter that removes empty span tags. 
Signed-off-by: Paul Stone <patches@pdjs.co.uk>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-07 18:59:33 -05:00
Edward Z. Yang
ac18672aba Fix extant broken PEARSax3 parsing patterns. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-02-26 21:14:52 -05:00
Edward Z. Yang
faf28682ad Manually work around PEARSax3 E_STRICT errors. 
Previously, my development environment was not running the PEARSax3
tests because my environment was set to E_STRICT error handling, and
thus the tests were skipped.  Relax this requirement by making the
wrapper class E_STRICT safe.  This introduces a few failing tests.

Also update TODO and add another fresh test.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-02-26 20:42:42 -05:00
Edward Z. Yang
e2cd852bcf Add shebang line to tests index script. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-02-15 02:55:43 -05:00
Edward Z. Yang
694583259c Fix autoparagraph bug with non-inline elements. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-02-15 02:55:33 -05:00
Edward Z. Yang
ba9fd175d7 Make extractBody not terminate prematurely on first </body>. 
Previously, if two </body> tags were present, HTML Purifier
would truncate everything after the first </body>.  This is
not ideal behavior; so HTML Purifier has been changed to
match up to the last </body>.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2009-07-07 22:19:04 -04:00
Edward Z. Yang
4d27906b02 Make %URI.Munge respect %URI.Host (don't munge). 
%URI.Munge incorrectly munged URIs that pointed to the
same host as the current website (it did, however, have
the correct behavior for when the munge URL was on the
same server).

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2009-07-06 22:04:51 -04:00
Edward Z. Yang
c7594487a2 Fix inability to totally override content model. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-06-10 18:24:52 -04:00
Edward Z. Yang
733a5ce5c3 Fix allowsElement() bug manifesting in LinkifyTest. 
Thanks frank farmer for reporting.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-06-10 18:11:34 -04:00
Edward Z. Yang
6e66dc9cad Add HTMLPurifier_config->serialize() 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-30 00:25:14 -04:00
Edward Z. Yang
84abae08f5 Relax allowed values of class for certain doctypes, see %Attr.ClassUseCDATA 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-26 01:07:40 -04:00
Edward Z. Yang
baf053b016 Implement %Attr.AllowedClasses and %Attr.ForbiddenClasses. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 22:08:45 -04:00
Edward Z. Yang
bfbe29d5a1 Rename ExtractStyleBlocks configuration parameters. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 21:54:39 -04:00
Edward Z. Yang
e194b8efc6 Rename AutoFormatParam.PurifierLinkifyDocURL. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 21:51:08 -04:00
Edward Z. Yang
41c9226f3d Style refresh: add/remove vimlines, fix minor factual errors. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-04-09 12:47:10 -04:00
Edward Z. Yang
e3c2063f69 Implement %AutoFormat.RemoveEmpty.RemoveNbsp, by popular demand. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-04-09 00:53:19 -04:00
Edward Z. Yang
398a02039e Implement %HTML.Attr.Name.UseCDATA which relaxes name validation rules. 
Sponsored-by: Ian Cook <thinkspill@gmail.com>
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-03-20 19:34:38 -04:00
Edward Z. Yang
84e2e141fc Fix bad configuration call in NameSyncTest.php. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-03-14 19:18:02 -04:00
Edward Z. Yang
eaa906f8fc Implement configuration inheritance. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-21 03:01:02 -05:00
Edward Z. Yang
86ca784da3 Convert all to new configuration get/set format. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-21 03:00:34 -05:00
Edward Z. Yang
b107eec452 Revamp configuration backend. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-21 03:00:33 -05:00
Edward Z. Yang
fcbf724e6e Make name="" and id="" play nicely together. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-21 02:58:30 -05:00
Edward Z. Yang
e802065b65 Punt Lexer test entirely for 5.0.5. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-16 17:18:30 -05:00
Edward Z. Yang
1d70929eba Add text parameter to unit tests, forces text output. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-16 17:18:30 -05:00
Edward Z. Yang
07ed1bbf8c Fix broken trusted comments functionality. 
This fix is slightly hackish, as we simply treat comments as whitespace.
This should largely be correct, and breaks no current test cases,
although it could result in noncompliant behavior.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-05 18:04:10 -05:00
Edward Z. Yang
b9094d5ec8 Convert HTMLPurifier_Config to use property list backend. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-02 18:42:23 -05:00
Edward Z. Yang
bfe474042f Implement "carryover" functionality, requested by Kinderlehrer <bitweaver@7doves.com> 
This commit is a limited implementation of the "active formatting
elements" algorithm implemented in HTML5, which preserves certain
formatting elements such as <a> and <b> when exiting or entering nodes.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2008-12-20 13:06:00 -05:00