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readline: fix wide char display width for Chinese characters (fix #25219) (#25220)

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kbkpbot 2025-09-02 23:01:26 +08:00 committed by GitHub
parent 19d31f221f
commit 840e659d08
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1 changed files with 10 additions and 5 deletions
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15
vlib/readline/readline_nix.c.v
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@ -10,6 +10,7 @@ module readline
import term.termios
import term
import os
import encoding.utf8.east_asian
fn C.raise(sig int)
@ -379,12 +380,16 @@ fn (mut r Readline) refresh_line() {
} else {
r.prompt
}
end_of_input = calculate_screen_position(last_prompt_line.len, 0, get_screen_columns(),
r.current.len, end_of_input)
last_prompt_width := east_asian.display_width(last_prompt_line, 1)
current_width := east_asian.display_width(r.current.string(), 1)
cursor_prefix_width := east_asian.display_width(r.current[..r.cursor].string(), 1)
end_of_input = calculate_screen_position(last_prompt_width, 0, get_screen_columns(),
current_width, end_of_input)
end_of_input[1] += r.current.filter(it == `\n`).len
mut cursor_pos := [0, 0]
cursor_pos = calculate_screen_position(last_prompt_line.len, 0, get_screen_columns(),
r.cursor, cursor_pos)
cursor_pos = calculate_screen_position(last_prompt_width, 0, get_screen_columns(),
cursor_prefix_width, cursor_pos)
shift_cursor(0, -r.cursor_row_offset)
term.erase_toend()
print(last_prompt_line)
@ -392,7 +397,7 @@ fn (mut r Readline) refresh_line() {
if end_of_input[0] == 0 && end_of_input[1] > 0 {
print('\n')
}
shift_cursor(cursor_pos[0] - r.prompt_offset, -(end_of_input[1] - cursor_pos[1]))
shift_cursor(cursor_pos[0], -(end_of_input[1] - cursor_pos[1]))
r.cursor_row_offset = cursor_pos[1]
}