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fix(windows): fix parsing of UTF-16 codepoints in eventFromRecord

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This commit is contained in:
CJ van den Berg 2024-07-01 17:54:26 +02:00 committed by Tim Culverhouse
parent 49ed160268
commit 99942da4e1
1 changed files with 41 additions and 12 deletions
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53
src/windows/Tty.zig
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@ -135,6 +135,8 @@ pub fn nextEvent(self: *Tty) !Event {
pub const EventState = struct {
ansi_buf: [128]u8 = undefined,
ansi_idx: usize = 0,
utf16_buf: [2]u16 = undefined,
utf16_half: bool = false,
escape_st: bool = false,
};
@ -143,16 +145,33 @@ pub fn eventFromRecord(self: *Tty, record: *const INPUT_RECORD, state: *EventSta
0x0001 => { // Key event
const event = record.Event.KeyEvent;
const base_layout: u21 = switch (event.wVirtualKeyCode) {
0x00 => { // delivered when we get an escape sequence
if (state.utf16_half) half: {
state.utf16_half = false;
state.utf16_buf[1] = event.uChar.UnicodeChar;
const codepoint: u21 = std.unicode.utf16DecodeSurrogatePair(&state.utf16_buf) catch break :half;
const n = std.unicode.utf8Encode(codepoint, &self.buf) catch return null;
const key: Key = .{
.codepoint = codepoint,
.base_layout_codepoint = codepoint,
.mods = translateMods(event.dwControlKeyState),
.text = self.buf[0..n],
};
switch (event.bKeyDown) {
0 => return .{ .key_release = key },
else => return .{ .key_press = key },
}
}
const base_layout: u16 = switch (event.wVirtualKeyCode) {
0x00 => blk: { // delivered when we get an escape sequence or a unicode codepoint
state.ansi_buf[state.ansi_idx] = event.uChar.AsciiChar;
state.ansi_idx += 1;
if (state.ansi_idx <= 2) {
return null;
}
switch (state.ansi_buf[1]) {
'[' => { // CSI, read until 0x40 to 0xFF
switch (event.uChar.AsciiChar) {
if (state.ansi_idx <= 2) return null;
switch (event.uChar.UnicodeChar) {
0x40...0xFF => {
return .cap_da1;
},
@ -160,7 +179,8 @@ pub fn eventFromRecord(self: *Tty, record: *const INPUT_RECORD, state: *EventSta
}
},
']' => { // OSC, read until ESC \ or BEL
switch (event.uChar.AsciiChar) {
if (state.ansi_idx <= 2) return null;
switch (event.uChar.UnicodeChar) {
0x07 => {
return .cap_da1;
},
@ -177,8 +197,9 @@ pub fn eventFromRecord(self: *Tty, record: *const INPUT_RECORD, state: *EventSta
else => return null,
}
},
else => return null,
else => {},
}
break :blk event.uChar.UnicodeChar;
},
0x08 => Key.backspace,
0x09 => Key.tab,
@ -271,13 +292,21 @@ pub fn eventFromRecord(self: *Tty, record: *const INPUT_RECORD, state: *EventSta
else => return null,
};
var codepoint: u21 = base_layout;
if (std.unicode.utf16IsHighSurrogate(base_layout)) {
state.utf16_buf[0] = base_layout;
state.utf16_half = true;
return null;
}
if (std.unicode.utf16IsLowSurrogate(base_layout)) {
return null;
}
const codepoint: u21 = base_layout;
var text: ?[]const u8 = null;
switch (event.uChar.UnicodeChar) {
0x00...0x1F => {},
else => |cp| {
codepoint = cp;
const n = try std.unicode.utf8Encode(cp, &self.buf);
else => {
const n = try std.unicode.utf8Encode(codepoint, &self.buf);
text = self.buf[0..n];
},
}