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fix(api): inconsistent scrolling when deleting before topline (#36301)

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Problem:  Inconsistent scrolling when deleting before topline with API.
Solution: Only special-case inserting just before topline, not deleting.
This commit is contained in:
zeertzjq
2025-10-27 07:53:15 +08:00
committed by GitHub
parent 2407833ba1
commit d707ccf988
2 changed files with 237 additions and 3 deletions
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3
src/nvim/mark.c
View File

@@ -1323,9 +1323,10 @@ void mark_adjust_buf(buf_T *buf, linenr_T line1, linenr_T line2, linenr_T amount
win->w_topline += amount;
}
win->w_topfill = 0;
} else if (amount_after
// api: display new line if inserted right at topline
// TODO(bfredl): maybe always?
} else if (amount_after && win->w_topline > line2 + (by_api ? 1 : 0)) {
&& win->w_topline > line2 + (by_api && line2 < line1 ? 1 : 0)) {
win->w_topline += amount_after;
win->w_topfill = 0;
}

233
test/functional/api/buffer_spec.lua
View File

@@ -469,6 +469,84 @@ describe('api/buf', function()
]],
}
end)
describe('of current window when', function()
before_each(function()
command('new | wincmd w | setlocal modified')
feed('Gk')
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
www |
xxx |
^yyy |
zzz |
{3:[No Name] [+] }|
|
]])
end)
it('deleting 3 lines around topline', function()
api.nvim_buf_set_lines(0, 3, 6, true, {})
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
ccc |
^yyy |
zzz |
{1:~ }|
{3:[No Name] [+] }|
|
]])
eq(5, api.nvim_buf_line_count(0))
end)
it('deleting 3 lines around the line just before topline', function()
api.nvim_buf_set_lines(0, 2, 5, true, {})
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
bbb |
xxx |
^yyy |
zzz |
{3:[No Name] [+] }|
|
]])
eq(5, api.nvim_buf_line_count(0))
end)
for count = 1, 4 do
it(('deleting %d lines just before topline'):format(count), function()
api.nvim_buf_set_lines(0, 4 - count, 4, true, {})
screen:expect_unchanged()
eq(8 - count, api.nvim_buf_line_count(0))
end)
it(('replacing %d lines just before topline with 2 lines'):format(count), function()
api.nvim_buf_set_lines(0, 4 - count, 4, true, { 'eee', 'fff' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
end
for count = 1, 3 do
it(('deleting %d lines far before topline'):format(count), function()
api.nvim_buf_set_lines(0, 0, count, true, {})
screen:expect_unchanged()
eq(8 - count, api.nvim_buf_line_count(0))
end)
it(('replacing %d lines far before topline with 2 lines'):format(count), function()
api.nvim_buf_set_lines(0, 0, count, true, { 'eee', 'fff' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
end
end)
end)
it('handles clearing out non-current buffer #24911', function()
@@ -1865,6 +1943,161 @@ describe('api/buf', function()
]],
}
end)
describe('of current window when', function()
before_each(function()
command('new | wincmd w | setlocal modified')
feed('Gk')
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
www |
xxx |
^yyy |
zzz |
{3:[No Name] [+] }|
|
]])
end)
it('deleting 3 lines around topline', function()
api.nvim_buf_set_text(0, 3, 0, 6, 0, {})
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
ccc |
^yyy |
zzz |
{1:~ }|
{3:[No Name] [+] }|
|
]])
eq(5, api.nvim_buf_line_count(0))
end)
it('deleting 3 lines around the line just before topline', function()
api.nvim_buf_set_text(0, 2, 0, 5, 0, {})
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
bbb |
xxx |
^yyy |
zzz |
{3:[No Name] [+] }|
|
]])
eq(5, api.nvim_buf_line_count(0))
end)
for count = 1, 4 do
it(('deleting %d lines just before topline'):format(count), function()
api.nvim_buf_set_text(0, 4 - count, 0, 4, 0, {})
screen:expect_unchanged()
eq(8 - count, api.nvim_buf_line_count(0))
end)
describe(('replacing %d lines just before topline with 2 lines'):format(count), function()
it('including final newline', function()
api.nvim_buf_set_text(0, 4 - count, 0, 4, 0, { 'eee', 'fff', '' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
it('excluding final newline', function()
api.nvim_buf_set_text(0, 4 - count, 0, 3, -1, { 'eee', 'fff' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
end)
end
for count = 1, 3 do
it(('deleting %d lines far before topline'):format(count), function()
api.nvim_buf_set_text(0, 0, 0, count, 0, {})
screen:expect_unchanged()
eq(8 - count, api.nvim_buf_line_count(0))
end)
describe(('replacing %d lines far before topline with 2 lines'):format(count), function()
it('including final newline', function()
api.nvim_buf_set_text(0, 0, 0, count, 0, { 'eee', 'fff', '' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
it('excluding final newline', function()
api.nvim_buf_set_text(0, 0, 0, count - 1, -1, { 'eee', 'fff' })
screen:expect_unchanged()
eq(8 - count + 2, api.nvim_buf_line_count(0))
end)
end)
end
describe('replacing topline', function()
describe('with 1 line', function()
local s1 = [[
|
{1:~ }|*4
{2:[No Name] }|
eee |
xxx |
^yyy |
zzz |
{3:[No Name] [+] }|
|
]]
it('including final newline', function()
api.nvim_buf_set_text(0, 4, 0, 5, 0, { 'eee', '' })
screen:expect(s1)
end)
it('excluding final newline', function()
api.nvim_buf_set_text(0, 4, 0, 4, -1, { 'eee' })
screen:expect(s1)
end)
end)
describe('with 2 lines', function()
local s2 = [[
|
{1:~ }|*4
{2:[No Name] }|
eee |
fff |
xxx |
^yyy |
{3:[No Name] [+] }|
|
]]
it('including final newline', function()
api.nvim_buf_set_text(0, 4, 0, 5, 0, { 'eee', 'fff', '' })
screen:expect(s2)
end)
it('excluding final newline', function()
api.nvim_buf_set_text(0, 4, 0, 4, -1, { 'eee', 'fff' })
screen:expect(s2)
end)
end)
end)
it('inserting at start of topline', function()
api.nvim_buf_set_text(0, 4, 0, 4, 0, { 'X', '' })
screen:expect([[
|
{1:~ }|*4
{2:[No Name] }|
X |
www |
xxx |
^yyy |
{3:[No Name] [+] }|
|
]])
end)
end)
end)
end)