Method _line_number_draw_callback

scene/gui/code_edit.cpp:1519–1558

}

void CodeEdit::_line_number_draw_callback(int p_line, int p_gutter, const Rect2 &p_region) {
	if (!Rect2(Vector2(0, 0), get_size()).intersects(p_region)) {
		return;
	}

	bool rtl = is_layout_rtl();
	HashMap<int, RID>::Iterator E = line_number_text_cache.find(p_line);
	RID text_rid;
	if (E) {
		text_rid = E->value;
	} else {
		String fc = String::num_int64(p_line + 1).lpad(line_number_digits, line_number_padding);
		if (is_localizing_numeral_system()) {
			fc = TS->format_number(fc);
		}

		text_rid = TS->create_shaped_text();
		if (theme_cache.font.is_valid()) {
			TS->shaped_text_add_string(text_rid, fc, theme_cache.font->get_rids(), theme_cache.font_size, theme_cache.font->get_opentype_features());
		}
		line_number_text_cache.insert(p_line, text_rid);
	}

	Size2 text_size = TS->shaped_text_get_size(text_rid);
	Point2 ofs = p_region.get_center() - text_size / 2;
	ofs.y += TS->shaped_text_get_ascent(text_rid);

	if (rtl) {
		ofs.x = p_region.get_end().x - text_size.width;
	} else {
		ofs.x = p_region.position.x;
	}

	Color number_color = get_line_gutter_item_color(p_line, line_number_gutter);
	if (number_color == Color(1, 1, 1)) {
		number_color = theme_cache.line_number_color;
	}

	TS->shaped_text_draw(text_rid, get_canvas_item(), ofs, -1, -1, number_color);
}

void CodeEdit::_clear_line_number_text_cache() {
	for (const KeyValue<int, RID> &KV : line_number_text_cache) {