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font: if a codepoint is emoji presentation, prefer that for shaping

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Fixes #787
This commit is contained in:
Mitchell Hashimoto
2023-11-02 21:46:50 -07:00
parent bbf333c5c6
commit 2275768383
3 changed files with 24 additions and 7 deletions
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15
src/font/shaper/run.zig
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@@ -1,6 +1,7 @@
const std = @import("std");
const assert = std.debug.assert;
const Allocator = std.mem.Allocator;
const ziglyph = @import("ziglyph");
const font = @import("../main.zig");
const shape = @import("../shape.zig");
const terminal = @import("../../terminal/main.zig");
@@ -109,12 +110,20 @@ pub const RunIterator = struct {
// presentation format must be directly adjacent to the codepoint.
var it = self.row.codepointIterator(j);
if (it.next()) |cp| {
if (cp == 0xFE0E) break :p font.Presentation.text;
if (cp == 0xFE0F) break :p font.Presentation.emoji;
if (cp == 0xFE0E) break :p .text;
if (cp == 0xFE0F) break :p .emoji;
}
break :p null;
} else null;
} else emoji: {
// If we're not a grapheme, our individual char could be
// an emoji so we want to check if we expect emoji presentation.
if (ziglyph.emoji.isEmojiPresentation(@intCast(cell.char))) {
break :emoji .emoji;
}
break :emoji .text;
};
// If our cursor is on this line then we break the run around the
// cursor. This means that any row with a cursor has at least