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Rewrite CSS url() and font-family output logic.

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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>
This commit is contained in:
Edward Z. Yang
2010-05-21 11:53:52 -04:00
parent df3100b1b3
commit d3abcb90e3
15 changed files with 99 additions and 86 deletions
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@@ -10,6 +10,9 @@ NEWS ( CHANGELOG and HISTORY ) HTMLPurifier
==========================
4.1.1, unknown release date
- Rewrite CSS output logic for font-family and url(). Thanks Mario
Heiderich <mario.heiderich@googlemail.com> for reporting and Takeshi
Terada <t-terada@violet.plala.or.jp> for suggesting the fix.
- Emit an error for CollectErrors if a body is extracted
- Fix bug where in background-position for center keyword handling.
- Fix infinite loop when a wrapper element is inserted in a context