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handle graphemes with more than 1 joiner

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This commit is contained in:
Mitchell Hashimoto
2022-09-05 10:35:22 -07:00
parent 47242ad12a
commit 802f230fa2
2 changed files with 15 additions and 15 deletions
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1
src/terminal/Screen.zig
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@ -1497,6 +1497,7 @@ pub fn testWriteString(self: *Screen, text: []const u8) !void {
// Get our row
var row = self.getRow(.{ .active = y });
// If we have a previous cell, we check if we're part of a grapheme.
if (grapheme.cell) |prev_cell| {
const grapheme_break = brk: {
var state: i32 = 0;

29
src/terminal/Terminal.zig
View File

@ -474,22 +474,21 @@ pub fn print(self: *Terminal, c: u21) !void {
};
};
var state: i32 = 0;
const grapheme_break = if (!prev.cell.attrs.grapheme)
utf8proc.graphemeBreakStateful(@intCast(u21, prev.cell.char), c, &state)
else brk: {
// We need to rebuild the state by processing the grapheme breaks
// for all the codepoints up to this point. This MUST exist because
// grapheme is only true iff this exists.
const points = self.screen.graphemes.getEntry(row.getId() + prev.x + 1).?;
const cp1 = switch (points.value_ptr.*) {
.one => |v| one: {
assert(!utf8proc.graphemeBreakStateful(@intCast(u21, prev.cell.char), v, &state));
break :one v;
},
const grapheme_break = brk: {
var state: i32 = 0;
var cp1 = @intCast(u21, prev.cell.char);
if (prev.cell.attrs.grapheme) {
var it = row.codepointIterator(prev.x);
while (it.next()) |cp2| {
assert(!utf8proc.graphemeBreakStateful(
cp1,
cp2,
&state,
));
else => @panic("NO"),
};
cp1 = cp2;
}
}
break :brk utf8proc.graphemeBreakStateful(cp1, c, &state);
};