There were multiple cases that could lead to problems like moving meta
strip into itself or into it's children meta strips.
Print error string to console when invalid action is requested.
This function can be used to move strips into meta strips with no
side effects like change of selection state.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D10759
Logic was broken into finding gaps and ofsetting strips.
Functions were modified so they work on explicitly defined seqbase,
so they can be used as python API functions.
Functional changes:
- Improve performance by calculating gap length and offseting strips
at once. Previously strips were offset by one frame.
- Calculate gap from start frame. Previously gap was considered only
inbetween strips.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D9730
Code was rewritten to work on per-sequence basis returning reference to
created strip.
There should be no functional changes.
Selection logic is left as is for now. I could simplify it, but it
belongs to operator, not split logic.
Reviewed By: sergey
Differential Revision: developer.blender.org/D9592
Move most functions into separate files.
File sequencer.c is reserved for alloc, free and duplicating functions.
There should be no functional changes.
