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windows: Fix line wrapping behaviour on the REPL.

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This enables going back to previous wrapped lines using backspace or left
arrow: instead of just sticking to the beginning of a line, the cursor will
move a line up.
This commit is contained in:
stijn 2018-06-21 11:54:49 +02:00 committed by Damien George
parent 4f44778728
commit 2762f323bf
1 changed files with 12 additions and 1 deletions
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13
ports/windows/windows_mphal.c
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@ -106,12 +106,23 @@ void mp_hal_set_interrupt_char(char c) {
} }
void mp_hal_move_cursor_back(uint pos) { void mp_hal_move_cursor_back(uint pos) {
if (!pos) {
return;
}
assure_conout_handle(); assure_conout_handle();
CONSOLE_SCREEN_BUFFER_INFO info; CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(con_out, &info); GetConsoleScreenBufferInfo(con_out, &info);
info.dwCursorPosition.X -= (short)pos; info.dwCursorPosition.X -= (short)pos;
if (info.dwCursorPosition.X < 0) { // Move up a line if needed.
while (info.dwCursorPosition.X < 0) {
info.dwCursorPosition.X = info.dwSize.X + info.dwCursorPosition.X;
info.dwCursorPosition.Y -= 1;
}
// Caller requested to move out of the screen. That's not possible so just clip,
// it's the caller's responsibility to not let this happen.
if (info.dwCursorPosition.Y < 0) {
info.dwCursorPosition.X = 0; info.dwCursorPosition.X = 0;
info.dwCursorPosition.Y = 0;
} }
SetConsoleCursorPosition(con_out, info.dwCursorPosition); SetConsoleCursorPosition(con_out, info.dwCursorPosition);
} }