- From: Tab Atkins Jr. <jackalmage@gmail.com>
- Date: Fri, 8 Apr 2011 13:54:11 -0700
In the legacy color parsing algorithm <http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#rules-for-parsing-a-legacy-color-value>, steps 5 and 6 concern CSS color names - 'transparent' should raise an error, and color names should be respected. All other CSS color syntaxes, though, such as the rgba() function, are just passed through to the rest of the algorithm and appropriately mangled. This doesn't match Webkit's behavior. Instead of steps 5 and 6, we just try to parse it as a CSS color. If we succeed, we use that color. Otherwise, we chunk it into the legacy parsing algorithm and do what the spec says. So, for example, <font color=rgba(255,0,0,.5)>foo</font> is actually displayed as partially-transparent red instead of dark green (following the algorithm mangles the string into #050). Could we change those two steps to just say "If keyword is a valid CSS color value, then return the simple color corresponding to that value."? (I guess, to fully match Webkit, you need to change the definition of "simple color" to take alpha into account.) ~TJ
Received on Friday, 8 April 2011 13:54:11 UTC