1964122 - Work with resolution side, not axis, when resolving `anchor()`

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, defect)

Description

[David Shin[:dshin]]

Previously, we mapped left: anchor(left); to "Resolve anchor(left) for property in horizontal axis" - However, this doesn't work for two reasons:

1. left: anchor(left) right: anchor(left) have to return 2 different values to produce the identical result
2. We need side data for left: anchor(inside)

So we specifically need "Resolve anchor(left) for the left side property"

Comment 1

[David Shin[:dshin]]

Attachment: Bug 1964122: Work with side, not axis, when resolving `anchor()` r=#anchor-positioning-reviewers,#style

Previously, we mapped left: anchor(left); to "Resolve anchor(left) with in
horizontal axis" - However, this doesn't work for two reasons:

1. left: anchor(left) and right: anchor(left) have to return 2 different
   values to produce the identical result
2. We need side data for left: anchor(inside) and right: anchor(outside)

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/812f9ed4e564
Work with side, not axis, when resolving `anchor()` r=firefox-style-system-reviewers,emilio

Comment 3

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/812f9ed4e564