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RTL: Improve performance by using list iterators for item/paragraph removal #80857

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merged 1 commit into from
Aug 25, 2023
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RTL: Improve performance by using list iterators for item/paragraph removal #80857

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30 changes: 18 additions & 12 deletions scene/gui/rich_text_label.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3095,15 +3095,17 @@ void RichTextLabel::_remove_item(Item *p_item, const int p_line, const int p_sub
// If a newline was erased, all lines AFTER the newline need to be decremented.
if (p_item->type == ITEM_NEWLINE) {
current_frame->lines.remove_at(p_line);
for (int i = 0; i < current->subitems.size(); i++) {
if (current->subitems[i]->line > p_subitem_line) {
current->subitems[i]->line--;
if (p_line < (int)current_frame->lines.size() && current_frame->lines[p_line].from) {
for (List<Item *>::Element *E = current_frame->lines[p_line].from->E; E; E = E->next()) {
if (E->get()->line > p_subitem_line) {
E->get()->line--;
}
}
}
}
} else {
// First, remove all child items for the provided item.
for (int i = 0; i < size; i++) {
while (p_item->subitems.size()) {
_remove_item(p_item->subitems.front()->get(), p_line, p_subitem_line);
}
// Then remove the provided item itself.
Expand Down Expand Up @@ -3199,19 +3201,23 @@ bool RichTextLabel::remove_paragraph(const int p_paragraph) {
}

// Remove all subitems with the same line as that provided.
Vector<int> subitem_indices_to_remove;
for (int i = 0; i < current->subitems.size(); i++) {
if (current->subitems[i]->line == p_paragraph) {
subitem_indices_to_remove.push_back(i);
Vector<List<Item *>::Element *> subitem_to_remove;
if (current_frame->lines[p_paragraph].from) {
for (List<Item *>::Element *E = current_frame->lines[p_paragraph].from->E; E; E = E->next()) {
if (E->get()->line == p_paragraph) {
subitem_to_remove.push_back(E);
} else {
break;
}
}
}

bool had_newline = false;
// Reverse for loop to remove items from the end first.
for (int i = subitem_indices_to_remove.size() - 1; i >= 0; i--) {
int subitem_idx = subitem_indices_to_remove[i];
had_newline = had_newline || current->subitems[subitem_idx]->type == ITEM_NEWLINE;
_remove_item(current->subitems[subitem_idx], current->subitems[subitem_idx]->line, p_paragraph);
for (int i = subitem_to_remove.size() - 1; i >= 0; i--) {
List<Item *>::Element *subitem = subitem_to_remove[i];
had_newline = had_newline || subitem->get()->type == ITEM_NEWLINE;
_remove_item(subitem->get(), subitem->get()->line, p_paragraph);
}

if (!had_newline) {
Expand Down