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fix: Multi byte truncate for displayer (#464)

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This is needed for calling strdisplaywidth() from Lua loop.

See https://github.com/nvim-telescope/telescope.nvim/issues/414
See a1ed941a78/src/nvim/eval/funcs.c (L9845-L9858)

Co-authored-by: Simon Hauser <Simon-Hauser@outlook.de>
This commit is contained in:
JINNOUCHI Yasushi
2021-01-31 18:55:17 +09:00
committed by GitHub
parent 4e0dfa2e70
commit 1ca1e7ccba
4 changed files with 138 additions and 9 deletions
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32
lua/tests/automated/entry_display_spec.lua Normal file
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@@ -0,0 +1,32 @@
local entry_display = require('telescope.pickers.entry_display')
describe('truncate', function()
for _, ambiwidth in ipairs{'single', 'double'} do
for _, case in ipairs{
{args = {'abcde', 6}, expected = {single = 'abcde', double = 'abcde'}},
{args = {'abcde', 5}, expected = {single = 'abcde', double = 'abcde'}},
{args = {'abcde', 4}, expected = {single = 'abc…', double = 'ab…'}},
{args = {'アイウエオ', 11}, expected = {single = 'アイウエオ', double = 'アイウエオ'}},
{args = {'アイウエオ', 10}, expected = {single = 'アイウエオ', double = 'アイウエオ'}},
{args = {'アイウエオ', 9}, expected = {single = 'アイウエ…', double = 'アイウ…'}},
{args = {'アイウエオ', 8}, expected = {single = 'アイウ…', double = 'アイウ…'}},
{args = {'├─┤', 7}, expected = {single = '├─┤', double = '├─┤'}},
{args = {'├─┤', 6}, expected = {single = '├─┤', double = '├─┤'}},
{args = {'├─┤', 5}, expected = {single = '├─┤', double = '├…'}},
{args = {'├─┤', 4}, expected = {single = '├─┤', double = '├…'}},
{args = {'├─┤', 3}, expected = {single = '├─┤', double = '…'}},
{args = {'├─┤', 2}, expected = {single = '├…', double = '…'}},
} do
local msg = ('can truncate: ambiwidth = %s, [%s, %d] -> %s'):format(ambiwidth, case.args[1], case.args[2], case.expected[ambiwidth])
it(msg, function()
local original = vim.o.ambiwidth
vim.o.ambiwidth = ambiwidth
assert.are.same(
case.expected[ambiwidth],
entry_display.truncate(case.args[1], case.args[2])
)
vim.o.ambiwidth = original
end)
end
end
end)