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LibWeb: Move event listeners, handlers and callbacks to the GC heap

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This patch moves the following things to being GC-allocated:
- Bindings::CallbackType
- HTML::EventHandler
- DOM::IDLEventListener
- DOM::DOMEventListener
- DOM::NodeFilter

Note that we only use PlatformObject for things that might be exposed
to web content. Anything that is only used internally inherits directly
from JS::Cell instead, making them a bit more lightweight.
This commit is contained in:
Andreas Kling 2022-08-08 14:12:01 +02:00
parent 967a3e5a45
commit 8cda70c892
57 changed files with 425 additions and 345 deletions
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11
Userland/Libraries/LibWeb/Bindings/IDLAbstractOperations.cpp
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@ -92,11 +92,10 @@ JS::Completion invoke_callback(Bindings::CallbackType& callback, Optional<JS::Va
this_argument = JS::js_undefined();
// 3. Let F be the ECMAScript object corresponding to callable.
auto* function_object = callback.callback.cell();
VERIFY(function_object);
auto& function_object = callback.callback;
// 4. If ! IsCallable(F) is false:
if (!function_object->is_function()) {
if (!function_object.is_function()) {
// 1. Note: This is only possible when the callback function came from an attribute marked with [LegacyTreatNonObjectAsNull].
// 2. Return the result of converting undefined to the callback function’s return type.
@ -106,7 +105,7 @@ JS::Completion invoke_callback(Bindings::CallbackType& callback, Optional<JS::Va
// 5. Let realm be F’s associated Realm.
// See the comment about associated realm on step 4 of call_user_object_operation.
auto& realm = function_object->shape().realm();
auto& realm = function_object.shape().realm();
// 6. Let relevant settings be realm’s settings object.
auto& relevant_settings = verify_cast<HTML::EnvironmentSettingsObject>(*realm.host_defined());
@ -124,8 +123,8 @@ JS::Completion invoke_callback(Bindings::CallbackType& callback, Optional<JS::Va
// For simplicity, we currently make the caller do this. However, this means we can't throw exceptions at this point like the spec wants us to.
// 11. Let callResult be Call(F, thisArg, esArgs).
auto& vm = function_object->vm();
auto call_result = JS::call(vm, verify_cast<JS::FunctionObject>(*function_object), this_argument.value(), move(args));
auto& vm = function_object.vm();
auto call_result = JS::call(vm, verify_cast<JS::FunctionObject>(function_object), this_argument.value(), move(args));
// 12. If callResult is an abrupt completion, set completion to callResult and jump to the step labeled return.
if (call_result.is_throw_completion()) {