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LibJS: Rework how native functions are called to improve |this| value

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Native functions now only get the Interpreter& as an argument. They can
then extract |this| along with any indexed arguments it wants from it.

This forces functions that want |this| to actually deal with calling
interpreter.this_value().to_object(), and dealing with the possibility
of a non-object |this|.

This is still not great but let's keep massaging it forward.
This commit is contained in:
Andreas Kling 2020-03-28 22:48:35 +01:00
parent c209ea1985
commit 7c4e53f31e
25 changed files with 145 additions and 102 deletions
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10
Libraries/LibWeb/Bindings/EventTargetWrapper.cpp
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@ -24,8 +24,9 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Function.h>
#include <AK/FlyString.h>
#include <AK/Function.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Function.h>
#include <LibWeb/Bindings/EventListenerWrapper.h>
#include <LibWeb/Bindings/EventTargetWrapper.h>
@ -38,7 +39,12 @@ namespace Bindings {
EventTargetWrapper::EventTargetWrapper(EventTarget& impl)
: m_impl(impl)
{
put_native_function("addEventListener", [](Object* this_object, const Vector<JS::Value>& arguments) {
put_native_function("addEventListener", [](JS::Interpreter& interpreter) -> JS::Value {
auto* this_object = interpreter.this_value().to_object(interpreter.heap());
if (!this_object)
return {};
auto& arguments = interpreter.call_frame().arguments;
if (arguments.size() < 2)
return JS::js_undefined();