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get_line_height and get_cursor_position

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This commit is contained in:
Alessandro Mauri 2025-06-30 13:08:27 +02:00
parent 88d9b65028
commit 9827a899f1
1 changed files with 30 additions and 0 deletions
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30
lib/ugui.c3l/src/ugui_font.c3
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@ -211,6 +211,34 @@ fn Rect? Ctx.get_text_bounds(&ctx, String text)
return text_bounds; return text_bounds;
} }
fn Point? Ctx.get_cursor_position(&ctx, String text)
{
short line_height = (short)ctx.font.ascender - (short)ctx.font.descender;
short line_gap = (short)ctx.font.linegap;
Glyph* gp;
// TODO: account for unicode codepoints
Point line;
Codepoint cp;
usz off, x;
while ((cp = str_to_codepoint(text[off..], &x)) != 0) {
off += x;
bool n;
if (!ascii::is_cntrl((char)cp)) {
gp = ctx.font.get_glyph(cp)!;
line.x += gp.adv;
} else if (cp == '\n'){
line.y += line_height + line_gap;
line.x = 0;
} else {
continue;
}
}
return line;
}
fn Point Ctx.center_text(&ctx, Rect text_bounds, Rect bounds) fn Point Ctx.center_text(&ctx, Rect text_bounds, Rect bounds)
{ {
short dw = bounds.w - text_bounds.w; short dw = bounds.w - text_bounds.w;
@ -234,3 +262,5 @@ fn Atlas*? Ctx.get_font_atlas(&ctx, String name)
return &ctx.font.atlas; return &ctx.font.atlas;
} }
fn int Font.line_height(&font) => (int)(font.ascender - font.descender + (float)0.5);