227941 2021-07-13 22:11:26 -0700 Web Inspector: REGRESSION(?): alpha slider doesn't match alpha input for `transparent` in color picker 2021-07-19 13:50:05 -0700 1 1 1 Unclassified WebKit Web Inspector WebKit Nightly Build All All RESOLVED FIXED InRadar P2 Normal --- 1 hi nvasilyev hi inspector-bugzilla-changes nvasilyev webkit-bug-importer oldest_to_newest 1776869 0 hi 2021-07-13 22:11:26 -0700 # STEPS TO REPRODUCE 1. inspect any page 2. add CSS `color: transparent` 3. click the color swatch to show the color picker # EXPECTED the alpha slider would be at the bottom and the alpha input would say `0` # ACTUAL the alpha slider is at the top and the alpha input says `0` 1776870 1 webkit-bug-importer 2021-07-13 22:11:43 -0700 <rdar://problem/80557438> 1777903 2 nvasilyev 2021-07-19 10:56:01 -0700 Reduction: data:text/html,<p%20style="color:transparent">color 1777905 3 433799 nvasilyev 2021-07-19 10:58:18 -0700 Created attachment 433799 Patch 1777907 4 433799 hi 2021-07-19 11:05:05 -0700 Comment on attachment 433799 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=433799&action=review > Source/WebInspectorUI/ChangeLog:11 > + When the initial value was set to 0, the `set value` was exiting early when the passed value was 0. Based on this, it seems like the real issue is that the initial value of `_knobY` is really the incorrect value? Changing to `NaN` seems a bit scary since there's no handling of `isNaN` anywhere in this file. Perhaps we just need to add a `recalculateKnobY` call inside the early return in `set value`? 1777914 5 nvasilyev 2021-07-19 11:22:55 -0700 This works as well. 1777915 6 433801 nvasilyev 2021-07-19 11:23:09 -0700 Created attachment 433801 Patch 1777919 7 433801 hi 2021-07-19 11:24:36 -0700 Comment on attachment 433801 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=433801&action=review > Source/WebInspectorUI/UserInterface/Views/Slider.js:61 > + this.recalculateKnobY(); We should only need to do this inside the `if (value === this._value)`. As you have it now, we'd call `set knobY` twice in the non-early-return path. 1777922 8 433804 nvasilyev 2021-07-19 11:31:16 -0700 Created attachment 433804 Patch 1777925 9 433804 hi 2021-07-19 11:39:11 -0700 Comment on attachment 433804 Patch r=me 1777986 10 ews-feeder 2021-07-19 13:50:03 -0700 Committed r280045 (239780@main): <https://commits.webkit.org/239780@main> All reviewed patches have been landed. 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