Problem: Filter test fails when $LANG is C.UTF-8.
Solution: Set 'helplang' to "en" for any C language. (Christian Brabandt,
closesvim/vim#3577)
dcd71cbaed
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.
Problem: Nasty autocommand causes using freed memory. (Dominique Pelle)
Solution: Do not force executing autocommands if the value of 'syntax' or
'filetype' did not change.
c3ffc9b8d3
Problem: Cursorline highlight not removed in some situation. (Vitaly
Yashin)
Solution: Reset last_cursorline when resetting 'cursorline'. (Christian
Brabandt, closesvim/vim#3481)
8c63e0ec31
Problem: Invalid memory access when setting wildchar empty.
Solution: Avoid going over the end of the option value. (Dominique Pelle,
closesvim/vim#1509) Make option test check all number options with
empty value.
a12e40351d
Problem: v:option_old and v:option_new are cleared when using :set in
OptionSet autocmd. (Gary Johnson)
Solution: Don't trigger OptionSet recursively.
3f3fb0b147
Problem: Problems with autocommands when opening help.
Solution: Avoid using invalid "varp" value. Allow using :wincmd if buffer
is locked. (closesvim/vim#1806, closesvim/vim#1804)
163095f088
Problem: When setting the cterm background with ":hi Normal" the value of
'background' may be set wrongly.
Solution: Check that the color is less than 16. Don't set 'background' when
it was set explicitly. (Lemonboy, closesvim/vim#1710)
1615b36b91
Restore reset_option_was_set(), removed in 419da839e0
ref #8595
ref #8597
Problem: Swap file exists briefly when opening the command window.
Solution: Set the noswapfile command modifier before splitting the window.
(James McCoy, closesvim/vim#1620)
3bab93998d
Problem: ":set scroll&" often gives an error.
Solution: Don't use a fixed default value, use half the window height. Add a
test. (Ozaki Kiichi, closesvim/vim#2104)
af2d20c628
Problem: Double free when compiled with EXITFREE and setting 'ttytype'.
Solution: Avoid setting P_ALLOCED on 'ttytype'. (Dominique Pelle,
closesvim/vim#1461)
673911457d
Make `:verbose set ...` show when an option was last modified by an
API client or Lua script/chunk. In the case of an API client, the
channel ID is displayed.
After this change we never release blocks from memory (in practice it
never happened because the memory limits are never reached). Let the OS
take care of that.
---
On today's systems the 'maxmem' and 'maxmemtot' values are huge (4+ GB)
so the limits are never reached in practice, but Vim wastes a lot of
time checking if the limit was reached.
If the limit is reached Vim starts saving pieces of the swap file that were in
memory to the disk. Said in a different way: Vim implements its own
memory-paging mechanism. This is unnecessary and inefficient since the
operating system already has virtual memory and will swap to the disk if
programs start using too much memory.
This change does...
1. Reduce the number of config options and need for documentation.
2. Make the code more efficient as we don't have to keep track of memory
usage nor check if the memory limits were reached to start swapping
to disk every time we need memory for buffers.
3. Simplify the code. Once memfile.c is simple enough it could be
replaced by actual operating system memory mapping (mmap,
MemoryViewOfFile...). This change does not prevent Vim to recover
changes from swap files since the swapping code is never triggered
with the huge limits set by default.
Problem: Crash when closing the quickfix window in a FileType autocommand
that triggers when the quickfix window is opened.
Solution: Save the new value before triggering the OptionSet autocommand.
Add the "starting" flag to test_override() to make the text work.
182a17b1e8
Problem: When running :make the output may be in the system encoding,
different from 'encoding'.
Solution: Add the 'makeencoding' option. (Ken Takata)
2c7292dc5b
Problem: Cannot make Vim fail on an internal error.
Solution: Add IEMSG() and IEMSG2(). (Domenique Pelle) Avoid reporting an
internal error without mentioning where.
95f096030e
Signed-off-by: Michael Schupikov <michael@schupikov.de>
