wlr_output_layout_get() returns NULL for disabled outputs.
Backtrace (abbreviated):
#0 lab_wlr_output_layout_layout_coords at ../src/ssd/ssd_extents.c:33
#1 ssd_extents_update at ../src/ssd/ssd_extents.c:133
#2 ssd_extents_create at ../src/ssd/ssd_extents.c:95
#3 ssd_create at ../src/ssd/ssd.c:161
#4 decorate.part.0.lto_priv.0 at ../src/view.c:637
#5 decorate at ../src/view.c:636
#6 view_set_fullscreen at ../src/view.c:716
#7 view_adjust_for_layout_change ../src/view.c:745
#8 desktop_arrange_all_views ../src/desktop.c:52
#9 output_update_all_usable_areas at ../src/output.c:495
#10 output_update_for_layout_change at ../src/output.c:263
#11 do_output_layout_change at ../src/output.c:423
#12 do_output_layout_change at ../src/cursor.c:267
#13 output_config_apply at ../src/output.c:334
#14 handle_output_manager_apply at ../src/output.c:354
- Store a pointer to the `struct view` in `struct ssd`
- Pass `struct ssd *` instead of `struct view *` to ssd functions
- Add `ssd_get_margin()` convenience function
- Minimize includes in `ssd.h`
- Avoid repetitive `view->ssd.margin` pattern
- Use `struct ssd *` or `const struct ssd *` rather than `struct view *`
where convenient
Part of the motivation is to make it easier to separate `struct ssd`
from `struct view` in a future commit.
IMHO it encourages better design (by making dependencies more obvious)
to have source file/header file pairs like view.c/view.h, rather than a
monolithic header like labwc.h with everything in it.
I don't think we need to break up all of labwc.h at once, but maybe we
can start pulling it apart bit by bit as it's convenient.
Also:
- Move "struct border" to ssd.h so that view.h can use it without pulling
in all of labwc.h.
- Add a missing required #include within scaled_font_buffer.h (forward
declaration of "struct font" is not enough).
