[Bug 1690517] Re: Cannot add files/folders to panel by dragging

[Simon Quigley]

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Title:
  Cannot add files/folders to panel by dragging

Status in mate-panel package in Ubuntu:
  In Progress
Status in mate-panel source package in Artful:
  In Progress
Status in mate-panel source package in Bionic:
  In Progress

Bug description:
  [Impact]

  Due to regression in mate-panel 1.18, it's impossible to use
  file/folder launchers on the panel. They will fail to load right after
  adding them to the panel.

  The fix for this issue is provided in the debdiff attached to the
  report.

  After MATE 1.18 had been released, it turned out that a lot of users
  rely on file/folder launchers in their daily mate-panel use. Some
  users even moved to other desktop environments due to this feature
  being broken. So it would be nice to backport the fix to Artful.

  [Test Case]

  To reproduce the issue, just open file manager (I use Caja, the
  default one in MATE) and drag some folder to mate-panel. A new
  launcher pointing to that folder will be created, but it will fail to
  load, so it won't appear on the panel.

  [Regression Potential]

  When I was fixing the issue, I had to revert a lot of code changes due
  to some inter-dependencies in these parts of code. There can be some
  regression potential in the following panel features:

  - running other types of launchers, besides file/folder ones
  - using launcher edit dialog
  - using desktop actions in the right-click menu of some launchers
    (e.g. firefox, thunderbird, hexchat)

  That said, all these features had been tested upstream before merging
  the fix. Won't hurt to test them more, of course. :)

  [Other Info]

  The fix would be useful in Zesty as well, as mate-panel 1.18.x there
  has the same bug. But I also have some more fixes for mate-panel in
  Zesty, and it seems to me they better go in the same SRU. In this
  case, the debdiff for Zesty should contain the patches for several bug
  reports instead of only one. I'm still wondering how to properly make
  such an SRU. For reference, these other reports are bug 1675888, bug
  1676840 and bug 1695648.

  [Original Description]

  To reproduce:
  1. Create an empty file named "empty" on the desktop.
  2. Drag it to the top panel.

  Expected:
  Icon to show up in panel.

  Results:
  Icon does not show up in panel.
  However, ~/.config/mate/panel2.d/default/launchers/empty.desktop is created.

  Tested on:
  ubuntu-mate-17.04-desktop-amd64.iso DVD live session: bug occurs
  ubuntu-mate-16.10-desktop-i386.iso DVD live session: bug does not occur (behaves as expected)

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