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patch 8.0.1848: 'termwinscroll' does not work properly

Problem:    'termwinscroll' does not work properly. (Dominique Pelle)
Solution:   Subtract removed scrollback from the scrollback count.  Add a test
            for 'termwinscroll'. (closes #2909)
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brammool committed May 15, 2018
1 parent 825ccf4 commit 4d6cd291cec668b991f2b43d76c6feab8b2e7d98
Showing with 31 additions and 0 deletions.
  1. +2 −0 src/terminal.c
  2. +27 −0 src/testdir/test_terminal.vim
  3. +2 −0 src/version.c
@@ -46,6 +46,7 @@
* - Win32: Redirecting output works but includes escape sequences.
* - Win32: Make terminal used for :!cmd in the GUI work better. Allow for
* redirection.
* - terminal API: Add more functionality? (Ozaki Kiichi 2018 May 13, #2907)
* - When the job only outputs lines, we could handle resizing the terminal
* better: store lines separated by line breaks, instead of screen lines,
* then when the window is resized redraw those lines.
@@ -2727,6 +2728,7 @@ handle_pushline(int cols, const VTermScreenCell *cells, void *user)
mch_memmove(term->tl_scrollback.ga_data,
(sb_line_T *)term->tl_scrollback.ga_data + todo,
sizeof(sb_line_T) * term->tl_scrollback.ga_len);
term->tl_scrollback_scrolled -= todo;
}
if (ga_grow(&term->tl_scrollback, 1) == OK)
@@ -1507,3 +1507,30 @@ func Test_terminal_out_err()
call delete('Xechoerrout.sh')
call delete(outfile)
endfunc
func Test_terminwinscroll()
if !has('unix')
return
endif
" Let the terminal output more than 'termwinscroll' lines, some at the start
" will be dropped.
exe 'set termwinscroll=' . &lines
let buf = term_start('/bin/sh')
for i in range(1, &lines)
call feedkeys("echo " . i . "\<CR>", 'xt')
call WaitForAssert({-> assert_match(string(i), term_getline(buf, term_getcursor(buf)[0] - 1))})
endfor
" Go to Terminal-Normal mode to update the buffer.
call feedkeys("\<C-W>N", 'xt')
call assert_inrange(&lines, &lines * 110 / 100 + winheight(0), line('$'))
" Every "echo nr" must only appear once
let lines = getline(1, line('$'))
for i in range(&lines - len(lines) / 2 + 2, &lines)
let filtered = filter(copy(lines), {idx, val -> val =~ 'echo ' . i . '\>'})
call assert_equal(1, len(filtered), 'for "echo ' . i . '"')
endfor
exe buf . 'bwipe!'
endfunc
@@ -761,6 +761,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1848,
/**/
1847,
/**/

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