- take a size parameter
- always NUL-terminate the result
- return libuv error code
- handle error in caller only (avoid redundant messages)
53995a38254c945f4936
In the case of the headless mode, screenchar() does not operate normally
because it is not output to the internal screen. Change output to stderr
and internal screen to fix it.
Problem: Cannot tell whether a register is being used for executing or
recording.
Solution: Add reg_executing() and reg_recording(). (Hirohito Higashi,
closesvim/vim#2745) Rename the global variables for consistency. Store
the register name in reg_executing.
0b6d911e5d
grid_xx functions shouldn't randomly be called when the screen is not valid.
Nvim deterministically initializes a default screen early in main(), so the
default grid can be assumed to be allocated.
Problem: Showing two characters for tab is limited.
Solution: Allow for a third character for "tab:" in 'listchars'. (Nathaniel
Braun, Ken Takata, closesvim/vim#3810)
83a52171ba
Using 'listchars' is a nice way to highlight tabs that were included by accident
for buffers that set 'expandtab'.
But maybe one does not want this for buffers that set 'noexpandtab', so now one
can use:
autocmd FileType go let &l:listchars .= ',tab: '
Add 'multiline' flag to history for correct :messages output
Use larger buffer size for multiline messages. if this turns out to not
be enough, we could do size calculation like api_set_error
Problem: Expression evaluation may repeat an error message. (Jason
Franklin)
Solution: Increment did_emsg and check for the value when giving an error
for the echo command.
76a6345433
- TUI: _never_ rely on BCE for implicit clearing, only explicit commands.
- TUI: use unibi_erase_chars when possible.
- TUI: use end-exclusive ranges for invalid and cleared areas
- screen: scrolling leaves scrolled in aree undefined. This is a
conservative change, a client assuming the old semantics will still
behave correctly.
- screen: factor out vsep handling from line drawing. This is needed
anyway for the multigrid refactor.
- screen: simplifications of win_do_lines
Avoid clearing the screen in most situations. NOT_VALID should be
equivalent to CLEAR unless some external force messed up the terminal,
for these situations <c-l> and :mode will still clear the screen.
Also eliminate some obsolete code in screen.c, that dealt with that in
vim drawing window 1 can mess up window 2, but this never happens in
nvim.
But what about slow terminals? There is two common meanings in which
a terminal is said to be "slow":
Most commonly (and in the sense of vim:s nottyfast) it means low
bandwidth for sending bytes from nvim to the terminal. If the screen is
very similar before and after the update_screen(CLEAR) this change
should reduce bandwidth. If the screen is quite different, but there is
no new regions of contiguous whitespace, clearing doesn't reduce
bandwidth significantly. If the new screen contains a lot of whitespace,
it will depend of if vsplits are used or not: as long as there is no
vsplits, ce is used to cheaply clear the rest of the line, so
full-screen clear is not needed to reduce bandwith. However a left
vsplit currently needs to be padded with whitespace all the way to the
separator. It is possible ec (clear N chars) can be used to reduce
bandwidth here if this is a problem. (All of this assumes that one
doesn't set Normal guibg=... on a non-BCE terminal, if you do you are
doomed regardless of this change).
Slow can also mean that drawing pixels on the screen is slow. E-ink
screens is a recent example. Avoiding clearing and redrawing the
unchanged part of the screen will always improve performance in these
cases.
