Three minification folds: gradient stops, gradient angle, alpha properties - #214
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CSS Images 4 sec. 3.4.1 defines the two-position stop as exactly the pair it abbreviates, so the pair was being emitted where the shorter equivalent is always available.
The default direction is that angle turned 180 degrees, so the angle buys nothing once the stops are reversed. Gated on unpositioned stops, whose positions would otherwise each need mirroring, and on the unprefixed gradients, since the legacy ones measure their angle from a different zero.
They parsed as unknown properties, so their values survived as opaque text and missed even leading-zero stripping. Each is an <alpha-value>, so they reuse the opacity reader, printer and normaliser wholesale.
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Three independent gaps, one commit each.
Adjacent gradient stops of one colour now fold into the double-position stop that CSS Images 4 defines as their exact equivalent. A
0deglinear-gradient angle is dropped and the stops reversed, since the default direction is that angle turned 180 degrees; this is gated on stops carrying no position, which the reversal would otherwise have to mirror to100% - p, and never applies to the legacy prefixed gradients, which measure their angle from a different zero.fill-opacityand its three siblings are now modelled as the<alpha-value>they are, instead of parsing as unknown properties whose text survives untouched.The
to topcase in the gradient-direction test changed meaning as a direct consequence of the second commit, so its oracle moved from0degto the reversed form.