1932025 - Fix some incorrectly using content-based minimum size of items in some cases where it should be zero

Status: NEW

(Core :: Layout: Grid, defect, P3)

Description

[Emily McDonough [:alaskanemily]]

We don't have correct checks for this in all circumstances. This change doesn't fix all situations, but should at least fix the cases found while working on Bug 1916849, and also fixes one other grid WPT.

Comment 1

[Emily McDonough [:alaskanemily]]

Attachment: Bug 1932025 - check for min-size-auto being zero when determining the minimum size of items.

We were largely protected from this missing check by simply not providing
intrinsic sizing for many items where it would cause a zero-size (mostly
spanning flex items).

Comment 2

[Emily McDonough [:alaskanemily]]

Attachment: Bug 1932025 Part 1 - Add a new grid item flag to indicate if automatic min-size is content based.

Comment 3

[Emily McDonough [:alaskanemily]]

Attachment: Bug 1932025 Part 2 - For grid items, the ItemState::eApplyAutoMinSize flag in MinSize to check if an item's automatic minimum size is based on its content-based minimum

This shouldn't actually change anything until intrinsic sizing is implemented
for flex items that span multiple tracks.