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csi: wip: styled underlines

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This is work in progress, and fairly untested.

This adds initial tracking of styled underlines. Setting attributes
seems to work (both color and underline style). Grid reflow has *not*
been tested.

When rendering, style is currently ignored (all styles are rendered as
a plain, legacy underline).

Color however, *is* applied.
This commit is contained in:
Daniel Eklöf 2024-06-23 17:39:15 +02:00
parent 20923bb2e8
commit 32effc6657
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GPG key ID: 5BBD4992C116573F
6 changed files with 371 additions and 66 deletions
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39
render.c
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@ -847,8 +847,43 @@ render_cell(struct terminal *term, pixman_image_t *pix, pixman_region32_t *damag
pixman_image_unref(clr_pix);
/* Underline */
if (cell->attrs.underline)
draw_underline(term, pix, font, &fg, x, y, cell_cols);
if (cell->attrs.underline) {
pixman_color_t underline_color = fg;
/* Check if cell has a styled underline. This lookup is fairly
expensive... */
if (row->extra != NULL) {
for (int i = 0; i < row->extra->curly_ranges.count; i++) {
const struct row_range *range = &row->extra->curly_ranges.v[i];
if (range->start <= col && col <= range->end) {
switch (range->curly.color_src) {
case COLOR_BASE256:
underline_color = color_hex_to_pixman(
term->colors.table[range->curly.color]);
break;
case COLOR_RGB:
underline_color =
color_hex_to_pixman(range->curly.color);
break;
case COLOR_DEFAULT:
break;
case COLOR_BASE16:
BUG("underline color can't be base-16");
break;
}
break;
}
}
}
draw_underline(term, pix, font, &underline_color, x, y, cell_cols);
}
if (cell->attrs.strikethrough)
draw_strikeout(term, pix, font, &fg, x, y, cell_cols);