X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/a875d0af5e235ce67db8e36269d7286dbe93b25c..a6eb921b9dfdfe8b1299b354885a0ee1dbe90a9c:/doc/todo/svg.mdwn

diff --git a/doc/todo/svg.mdwn b/doc/todo/svg.mdwn
index fc7686364..0a15af4cd 100644
--- a/doc/todo/svg.mdwn
+++ b/doc/todo/svg.mdwn
@@ -4,4 +4,55 @@ We should support SVG.  In particular:
 
 * We could support editing SVGs via the web interface.  SVG can contain unsafe content such as scripting, so we would need to whitelist safe markup.
 
---[[JoshTriplett]]
\ No newline at end of file
+--[[JoshTriplett]]
+
+[[wishlist]]
+
+I'm allowing for inline SVG on my own installation.  I've patched my
+copy of htmlscrubber.pm to allow safe MathML and SVG elements (as
+implemented in html5lib).  <del datetime="2008-03-20T23:04-05:00">Here's a patch
+if anyone else is interested.</del>
+<ins datetime="2008-03-20T23:05-05:00">Actually, that patch wasn't quite
+right.  I'll post a new one when it's working properly.</ins> --[[JasonBlevins]]
+
+* * *
+
+I'd like to hear what people think about the following:
+
+1. Including whitelists of elements and attributes for SVG and MathML in
+   htmlscrubber.
+
+2. Creating a whitelist of safe SVG (and maybe even HTML) style
+   attributes such as `fill`, `stroke-width`, etc.
+
+   This is how the [sanitizer][] in html5lib works.  It shouldn't be too
+   hard to translate the relevant parts to Perl.
+
+   --[[JasonBlevins]], March 21, 2008 11:39 EDT
+
+[sanitizer]: http://code.google.com/p/html5lib/source/browse/trunk/ruby/lib/html5/sanitizer.rb
+
+* * * 
+
+Another problem is that [HTML::Scrubber][] converts all tags to lowercase.
+Some SVG elements, such as viewBox, are mixed case.  It seems that
+properly handling SVG might require moving to a different sanitizer.
+It seems that [HTML::Sanitizer][] has functions for sanitizing XHTML.
+Any thoughts? --[[JasonBlevins]], March 21, 2008 13:54 EDT
+
+[HTML::Scrubber]: http://search.cpan.org/~podmaster/HTML-Scrubber-0.08/Scrubber.pm
+[HTML::Sanitizer]: http://search.cpan.org/~nesting/HTML-Sanitizer-0.04/Sanitizer.pm
+
+I figured out a quick hack to make HTML::Scrubber case-sensitive by
+making the underlying HTML::Parser case-sensitive:
+
+    $_scrubber->{_p}->case_sensitive(1);
+
+So now I've got a version of [htmlscrubber.pm][] ([diff][])
+which allows safe SVG and MathML elements and attributes (but no
+styles&mdash;do we need them?).  I'd be thrilled to see this
+in the trunk if other people think it's useful.
+--[[JasonBlevins]], March 24, 2008 14:56 EDT
+
+[htmlscrubber.pm]:http://xbeta.org/gitweb/?p=xbeta/ikiwiki.git;a=blob;f=IkiWiki/Plugin/htmlscrubber.pm;h=3c0ddc8f25bd8cb863634a9d54b40e299e60f7df;hb=fe333c8e5b4a5f374a059596ee698dacd755182d
+[diff]: http://xbeta.org/gitweb/?p=xbeta/ikiwiki.git;a=blobdiff;f=IkiWiki/Plugin/htmlscrubber.pm;h=3c0ddc8f25bd8cb863634a9d54b40e299e60f7df;hp=3bdaccea119ec0e1b289a0da2f6d90e2219b8d66;hb=fe333c8e5b4a5f374a059596ee698dacd755182d;hpb=be0b4f603f918444b906e42825908ddac78b7073