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LibWeb: Implement CSS color parsing from Tokens

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This was broken when we switched away from using StringStyleValues.
While I was at it, I have implemented hsl/a() and the percentage
syntax for rgb/a().

As a bonus, added `colors.html` as a test page for the various CSS
color syntaxes, since nothing was testing rgb() or rgba() before.

Much of the parsing code in LibGFX/Color.h seems to be centered
around CSS color values, but this is not used by the new Parser.
(And can't be used, because it requires a String value and we have
a list of Tokens of some kind instead.) Maybe that should be removed
from there when the new CSS parser is operational.
This commit is contained in:
Sam Atkins 2021-07-18 21:20:40 +01:00 • committed by Andreas Kling
parent fabbd06de4
commit 7abfb18656
4 changed files with 195 additions and 9 deletions
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Base/res/html/misc/welcome.html
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@ -114,6 +114,7 @@
<li><a href="form.html">form</a></li>
<li><a href="borders.html">borders</a></li>
<li><a href="css.html">css</a></li>
<li><a href="colors.html">css colors</a></li>
<li><a href="acid1.html">acid1</a></li>
<li><a href="acid2.html">acid2</a></li>
<li><a href="attrselectors.html">attribute selectors</a></li>