1635265 - Support multicol inspector in DevTools

Status: RESOLVED DUPLICATE of bug 1817514

(DevTools :: Inspector: Layout, enhancement)

Description

[Ting-Yu Lin [:TYLin] (PDT, UTC-7)]

Attachment: multicol_test.html

Inspired by bug 1635225 that the test uses mulitcol as a tool to fragmenting a flex container. I think it would be useful to display more information about the multicol layout itself.

For example in the attached testcase, a block was being fragmented in a multicol. I feel some information might be useful to the user.

1. What is the actual used-value of column width? And how many columns are computed by our layout engine (based on either width or column-width)? As we know that both column-count or column-width are just suggestion to the layout engine, not reflecting something the actual used by the layout.
2. Currently, the "Box Model" of the fragmented block displays the union of the bounding rects of all its fragments in all the columns. It definitely would be more useful to display the rect of each of its fragments.

Comment 1

[Ting-Yu Lin [:TYLin] (PDT, UTC-7)]

Attachment: multicol_test.html