- Removed term.c, term.h and term_defs.h
- Tests for T_* values were removed. screen.c was simplified as a
consequence(the best strategy for drawing is implemented in the UI layer)
- Redraw functions now call ui.c functions directly. Updates are flushed with
`ui_flush()`
- Removed all termcap options(they now return empty strings for compatibility)
- &term/&ttybuiltin options return a constant value(nvim)
- &t_Co is still available, but it mirrors t_colors directly
- Remove cursor tracking from screen.c and the `screen_start` function. Now the
UI is expected to maintain cursor state across any call, and reset it when
resized.
- Remove unused code
Some screen tests such as system/ctrl+c(viml_system_spec.lua) can take some time
to respond(default kill timeout is 2 seconds for an interrupted job) and fail
when running under a slow environment such as travis.
While running under valgrind, the screen can take significantly longer to
update(especially on travis) so a higher timeout can be required. Also reduce
the timeout when not running on valgrind.
When a test that fails leaves nvim in a 'Press Enter...' state, the whole suite
will hang because the `qa!` command executed before the next test won't be
processed until '<enter>' is sent.
Now the lua client can send a signal with when `Session:exit()` is called, so
the `qa!` request is no longer necessary.
Also:
- Set noswapfile at startup to prevent tests from leaving .s* swap files(should
also improve test environment determinism)
- Use `assert(false, msg) instead of `error(msg)` to report screen assertion
failures.
