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renderer: also constrain PUA chars if preceded by PUA

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This commit is contained in:
Mitchell Hashimoto
2023-12-16 20:18:14 -08:00
parent 231a2b6369
commit 9178fabc5d
1 changed files with 15 additions and 5 deletions
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20
src/renderer/cell.zig
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@ -45,13 +45,23 @@ pub fn fgMode(
break :text .normal;
}
// If we are at the end of the screen its definitely constrained
if (x == screen.cols - 1) break :text .constrained;
// If we have a previous cell and it was PUA then we need to
// also constrain. This is so that multiple PUA glyphs align.
if (x > 0) {
const prev_cell = screen.getCell(.active, y, x - 1);
if (ziglyph.general_category.isPrivateUse(@intCast(prev_cell.char))) {
break :text .constrained;
}
}
// If the next cell is empty, then we allow it to use the
// full glyph size.
if (x < screen.cols - 1) {
const next_cell = screen.getCell(.active, y, x + 1);
if (next_cell.char == 0 or next_cell.char == ' ') {
break :text .normal;
}
const next_cell = screen.getCell(.active, y, x + 1);
if (next_cell.char == 0 or next_cell.char == ' ') {
break :text .normal;
}
// Must be constrained