void Text::scroll_to(DimensionName dimension, Coord position) {
// let the user scroll to the right (or down) past the current size.
/*
if (position > (upper(dimension) - cur_length(dimension))) {
position = upper(dimension) - cur_length(dimension);
}
*/
// if (position < lower(dimension)) {
// position = lower(dimension);
// }
if (dimension == Dimension_X) {
if (position < lower(dimension)) {
position = lower(dimension);
}
} else {
if (position > (upper(dimension) - cur_length(dimension))) {
position = upper(dimension) - cur_length(dimension);
}
}
if (position == cur_lower(dimension)) {
return;
}
cur_lower(dimension, position);
notify(dimension);
damage();
}
Coord Adjustable::large_scroll(DimensionName d) const {
Coord s = impl_->info_[d].large_;
if (Math::equal(s, float(0), float(1e-4))) {
s = cur_length(d) - 1;
}
return s;
}
void Adjustable::constrain(DimensionName d, Coord& new_lower) const {
Coord a = lower(d);
Coord b = upper(d) - cur_length(d);
if (new_lower < a) {
new_lower = a;
} else if (new_lower > b) {
new_lower = b;
}
}
str
make_str ()
{
int n;
str s;
n = cur_length();
s = new_str(n);
memcpy(s, cur_str, n);
cur_str_ptr = cur_str;
return s;
}
Coord Adjustable::cur_upper(DimensionName d) const {
return cur_lower(d) + cur_length(d);
}
void tex::show_node_list(ptr p)
{
int n;
if (cur_length() > depth_threshold) {
if (p > null)
print(" []");
return;
}
n = 0;
while (p > null) {
print_ln();
print_str();
incr(n);
if (n > breadth_max) {
print("etc.");
return;
}
if (is_char_node(p)) {
print_font_and_char(p);
} else {
switch (type(p))
{
case HLIST_NODE:
case VLIST_NODE:
case UNSET_NODE:
show_box1(p);
break;
case RULE_NODE:
show_rule(p);
break;
case INS_NODE:
show_insertion(p);
break;
case WHATSIT_NODE:
show_whatsit(p);
break;
case GLUE_NODE:
show_glue(p);
break;
case KERN_NODE:
show_kern(p);
break;
case MATH_NODE:
show_math(p);
break;
case LIGATURE_NODE:
show_ligature(p);
break;
case PENALTY_NODE:
show_penalty(p);
break;
case DISC_NODE:
show_discretionary(p);
break;
case MARK_NODE:
show_mark(p);
break;
case ADJUST_NODE:
show_adjust(p);
break;
case STYLE_NODE:
print_style(subtype(p));
break;
case CHOICE_NODE:
show_choice_node(p);
break;
case INNER_NOAD:
case ORD_NOAD:
case OP_NOAD:
case BIN_NOAD:
case REL_NOAD:
case OPEN_NOAD:
case CLOSE_NOAD:
case PUNCT_NOAD:
case RADICAL_NOAD:
case OVER_NOAD:
case UNDER_NOAD:
case VCENTER_NOAD:
case ACCENT_NOAD:
case LEFT_NOAD:
case RIGHT_NOAD:
show_normal_noad(p);
break;
case FRACTION_NOAD:
show_fraction_noad(p);
break;
default:
print("Unknown node type!");
break;
}
}
p = link(p);
}
}
void Text::page_backward(DimensionName dimension) {
scroll_to(dimension, cur_lower(dimension) - cur_length(dimension));
}