If left without a width/height, swipeFrame goes off track when the image
isn't wide enough to fill the available width. The spaceLeft prevented
reaching the right edge of the image.
This re-implements image commenting in merge request diffs.
This feature was previously lost when the merge request
page was refactored into Vue.
With this, we create an overlay component. The overlay
component handles displaying the comment badges
and the comment form badge.
Badges are displayed based on the position attribute
sent with the discussion.
Comment forms for diff files are controlled through
a different state property. This is so we don't
tie comment forms to diff files directly creating
deep nested state. Instead we create a flat array
which holds the file hash & the X & Y position of
the comment form.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/48956
ftab
Winnie Hellmann
Natalia Tepluhina
Phil Hughes
Johann Hubert Sonntagbauer
Tim Zallmann