1226305 - overflow-clip-box:content-box doesn't clip properly in some cases

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

[Mats Palmgren (inactive)]

Attachment: testcase

It appears we don't clip to the content-box on the top/left side properly
when there is overflow only on the left and/or top side.

Comment 1

[Mats Palmgren (inactive)]

It does work for <input> though when the text scrolls out on the left side,
which surprises me since I thought those went through the same code paths...

Comment 2

[Mats Palmgren (inactive)]

Dumping the frame trees for the cases with red areas in the atached testcase
shows that there is no registered overflow areas on those frames.
Dumping the frame tree for an <input> with some text scrolled out-of-view
on the left side shows there is some overflow areas there.

Comment 3

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

Attachment: Bug 1226305 - Fix clipRect if overflow-clip-box is content-box in any axis. r?emilio

In ScrollFrameHelper::BuildDisplayList(), before comparing the clipRect
with scrollable overflow area, we should deflate the clipRect with
padding if overflow-clip-box is content-box in any axis, to get the
correct content-box dimension in that axis.

overflow-clip-box-3.html is adapted from the testcase attached in bug
1226305 comment 0.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/5461febd021f
Fix clipRect if overflow-clip-box is content-box in any axis. r=emilio

Comment 5

[Bogdan Tara[:bogdan_tara | bogdant]]

https://hg.mozilla.org/mozilla-central/rev/5461febd021f