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LibWeb: Add supporting method to get navigables whose SHE will change

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Implements https://html.spec.whatwg.org/multipage/browsing-the-web.html#get-all-navigables-whose-current-session-history-entry-will-change-or-reload
This commit is contained in:
Aliaksandr Kalenik 2023-06-19 21:11:30 +03:00 committed by Andreas Kling
parent 9c1087de8c
commit caf7fd4f19
Notes: sideshowbarker 2024-07-17 08:35:21 +09:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/SerenityOS/serenity/commit/caf7fd4f19
Pull-request: https://github.com/SerenityOS/serenity/pull/19490
2 changed files with 33 additions and 0 deletions
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32
Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
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@ -190,6 +190,38 @@ int TraversableNavigable::get_the_used_step(int step) const
return result.value();
}
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#get-all-navigables-whose-current-session-history-entry-will-change-or-reload
Vector<JS::Handle<Navigable>> TraversableNavigable::get_all_navigables_whose_current_session_history_entry_will_change_or_reload(int target_step) const
{
// 1. Let results be an empty list.
Vector<JS::Handle<Navigable>> results;
// 2. Let navigablesToCheck be « traversable ».
Vector<JS::Handle<Navigable>> navigables_to_check;
navigables_to_check.append(const_cast<TraversableNavigable&>(*this));
// 3. For each navigable of navigablesToCheck:
while (!navigables_to_check.is_empty()) {
auto navigable = navigables_to_check.take_first();
// 1. Let targetEntry be the result of getting the target history entry given navigable and targetStep.
auto target_entry = navigable->get_the_target_history_entry(target_step);
// 2. If targetEntry is not navigable's current session history entry or targetEntry's document state's reload pending is true, then append navigable to results.
if (target_entry != navigable->current_session_history_entry() || target_entry->document_state->reload_pending()) {
results.append(*navigable);
}
// 3. If targetEntry's document is navigable's document, and targetEntry's document state's reload pending is false, then extend navigablesToCheck with the child navigables of navigable.
if (target_entry->document_state->document() == navigable->active_document() && !target_entry->document_state->reload_pending()) {
navigables_to_check.extend(navigable->child_navigables());
}
}
// 4. Return results.
return results;
}
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#clear-the-forward-session-history
void TraversableNavigable::clear_the_forward_session_history()
{

1
Userland/Libraries/LibWeb/HTML/TraversableNavigable.h
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@ -37,6 +37,7 @@ public:
HistoryObjectLengthAndIndex get_the_history_object_length_and_index(int) const;
int get_the_used_step(int step) const;
Vector<JS::Handle<Navigable>> get_all_navigables_whose_current_session_history_entry_will_change_or_reload(int) const;
Vector<int> get_all_used_history_steps() const;
void clear_the_forward_session_history();