split more code from gdk bindings

[totaam]

Issue migrated from trac ticket # 1588

component: core | priority: major | resolution: fixed

2017-07-20 10:24:14: antoine created the issue

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Currently this requires the X11 headers, but there are a number of methods that we could use on other platforms, ie: the gtk selectiondata workaround from #1579.
This would also make it easier to port to python3 / GTK3 (#1568)

[totaam]

2017-07-20 10:33:03: antoine changed status from new to assigned

[totaam]

2017-07-20 10:33:03: antoine commented

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The split is needed to fix the gtk selectiondata workaround on osx: #318

[totaam]

2017-07-27 15:54:12: antoine changed status from assigned to closed

[totaam]

2017-07-27 15:54:12: antoine set resolution to fixed

[totaam]

2017-07-27 15:54:12: antoine commented

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Done in r16535.

There isn't much that can be moved, but at least the separation is clean.
For example, the gdk_atoms code (also used by the clipboard) is GTK2 only.