9ee26a608e
Add DRAG_ABORT to enum drag_result_t. DRAG_ABORT will indicate the drag operation cannot be completed. Return DRAG_ABORT on UnmapNotify, or when the keyboard or pointer cannot be grabbed. Add DRAGGING to return value for drag_result_t. DRAGGING is used internally by drag_pointer to indicate the drag is in progress. Change DRAG_CANCEL to DRAG_REVERT to clarify the distinction between "abort" and "revert/cancel" actions. Fixes an issue that caused i3 to crash when a user is dragging or resizing a floating window that becomes destroyed.
