data-device: Implement compositor-chosen actions

Set up a keyboard grab during drag-and-drop, so we can translate
modifiers into preferred actions. The compositor chosen action
is stored in the current weston_data_source in order to make it
accessible to the source/offer at the time of calculating the new
action, but would conceptually be part of weston_drag.

The mapping has been made similar to what GTK+/QT usually do, the
shift key defaults to "move" and ctrl defaults to "copy".

Changes since v2:
  - Use enum types and values for the compositor action. Fix
    code formatting issues.

Changes since v1:
  - Handle the keyboard grab being cancelled. Initialize new
    wl_data_source fields.

Signed-off-by: Carlos Garnacho <carlosg@gnome.org>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

0 files changed, 0 insertions, 0 deletions