Closed
Bug 1867908
Opened 7 months ago
Closed 6 months ago
[css-values] round() with a negative step is wrong
Categories
(Core :: CSS Parsing and Computation, defect, P3)
Core
CSS Parsing and Computation
Tracking
()
RESOLVED
FIXED
123 Branch
| Tracking | Status | |
|---|---|---|
| firefox123 | --- | fixed |
People
(Reporter: Oriol, Assigned: eliotj12, Mentored)
References
Details
(Keywords: good-first-bug)
Attachments
(1 file, 1 obsolete file)
<!DOCTYPE html>
<div style="z-index: round(nearest, 2.5, -1)"></div>
<div style="z-index: round(up, 2.5, -1)"></div>
<div style="z-index: round(down, 2.5, -1)"></div>
<div style="z-index: round(to-zero, 2.5, -1)"></div>
<script>
for (let el of document.querySelectorAll("div")) {
el.textContent = getComputedStyle(el).zIndex;
}
</script>
Expected:
3
3
2
2
Actual:
2
2
3
2
Blink and WebKit are right.
|
Reporter | |
Comment 1•7 months ago
|
||
let div = value / step;
let lower_bound = div.floor() * step;
let upper_bound = div.ceil() * step;
If step < 0, then lower_bound > upper_bound, breaking the logic.
Note that the sign of the step shouldn't matter, so just doing let step = step.unitless_value().abs(); should be enough.
Keywords: good-first-bug
|
||
Updated•7 months ago
|
Mentor: emilio
Severity: -- → S3
Priority: -- → P3
|
Assignee | |
Comment 2•6 months ago
|
||
|
||
Updated•6 months ago
|
Assignee: nobody → eliotj12
Status: NEW → ASSIGNED
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|
Assignee | |
Comment 3•6 months ago
|
||
(In reply to Oriol Brufau [:Oriol] from comment #1)
Note that the sign of the step shouldn't matter, so just doing
let step = step.unitless_value().abs();should be enough.
I've made that change. Have built and tested, and am now getting correct results (3,3,2,2 - per your example).
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Assignee | |
Comment 4•6 months ago
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||
|
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Updated•6 months ago
|
Attachment #9369931 -
Attachment is obsolete: true
Pushed by ealvarez@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/789ecd85405c Fix round() with negative step returning incorrect value r=emilio
Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/43790 for changes under testing/web-platform/tests
|
||
Comment 7•6 months ago
|
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| bugherder | ||
Status: ASSIGNED → RESOLVED
Closed: 6 months ago
status-firefox123:
--- → fixed
Resolution: --- → FIXED
Target Milestone: --- → 123 Branch
Upstream PR merged by moz-wptsync-bot
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Description
•