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LibWeb: Return a representation of an 'Agent' in 'relevant agent'

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This makes it more convenient to use the 'relvant agent' concept,
instead of the awkward dynamic casts we needed to do for every call
site.

mutation_observers is also changed to hold a GC::Root instead of raw
GC::Ptr. Somehow this was not causing problems before, but trips up CI
after these changes.
This commit is contained in:
Shannon Booth 2025-01-04 23:12:55 +13:00 • committed by Tim Flynn
commit 64eeda6450
Notes: github-actions[bot] 2025-01-11 15:40:39 +00:00
15 changed files with 140 additions and 98 deletions
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7
Libraries/LibWeb/DOM/MutationObserver.cpp
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@ -9,6 +9,7 @@
#include <LibWeb/Bindings/MutationObserverPrototype.h>
#include <LibWeb/DOM/MutationObserver.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/HTML/Scripting/Agent.h>
namespace Web::DOM {
@ -29,14 +30,12 @@ MutationObserver::MutationObserver(JS::Realm& realm, GC::Ptr<WebIDL::CallbackTyp
// 1. Set this’s callback to callback.
// 2. Append this to this’s relevant agent’s mutation observers.
auto* agent_custom_data = verify_cast<Bindings::WebEngineCustomData>(realm.vm().custom_data());
agent_custom_data->mutation_observers.append(*this);
HTML::relevant_agent(*this).mutation_observers.append(*this);
}
MutationObserver::~MutationObserver()
{
auto* agent_custom_data = verify_cast<Bindings::WebEngineCustomData>(vm().custom_data());
agent_custom_data->mutation_observers.remove_all_matching([this](auto& observer) {
HTML::relevant_agent(*this).mutation_observers.remove_all_matching([this](auto& observer) {
return observer.ptr() == this;
});
}