tree a48780fc2a68b5c7e54786dccec71d3f25db606f
parent 9abd4415cda61758e59cd680d0dbe6876628a496
author viktard <viktard@google.com> 1539812570 -0700
committer Paladox none <thomasmulhall410@yahoo.com> 1539966729 +0000

Fix triple click select and copy when other diff side is empty

Triple click in side-by-side mode with other side empty results in DOM
selection ending on the empty div line number tag. Normalizing such
selection results in null element for the end container.

This is handled on ad-hoc basis by validating where DOM selection landed
and is handled properly.

Previous fix (https://gerrit-review.googlesource.com/c/gerrit/+/193470)
was only addressing the case when the other diff side is populated.

Bug: Issue 8431
Change-Id: I17964db98c217d30dd266e01d0a03a11ed9c42b9
(cherry picked from commit 05e0f2060028c5cd34b9418678050d2067238441)