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Fix rendering of multi-byte strings #231

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merged 1 commit into from
Jan 14, 2021
Merged

Fix rendering of multi-byte strings #231

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15 changes: 12 additions & 3 deletions api_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -111,19 +111,28 @@ func Interrupt() {
interrupt_comm <- struct{}{}
}

// https://docs.microsoft.com/en-us/windows/console/char-info-str
const (
common_lvb_leading_byte = 0x0100
common_lvb_trailing_byte = 0x0200
)

// Synchronizes the internal back buffer with the terminal.
func Flush() error {
update_size_maybe()
prepare_diff_messages()
for _, diff := range diffbuf {
chars := []char_info{}
for _, char := range diff.chars {
chars = append(chars, char)
if runewidth.RuneWidth(rune(char.char)) > 1 {
char.attr |= common_lvb_leading_byte
chars = append(chars, char)
chars = append(chars, char_info{
char: ' ',
attr: char.attr,
char: char.char,
attr: char.attr | common_lvb_trailing_byte,
})
} else {
chars = append(chars, char)
}
}
r := small_rect{
Expand Down