b91c49364d
This makes it more symmetrical with adopt_own() (which is used to create a NonnullOwnPtr from the result of a naked new.)
79 lines
3 KiB
C++
79 lines
3 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Interpreter.h>
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#include <LibJS/Parser.h>
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#include <LibJS/Runtime/ScriptFunction.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/EventListener.h>
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#include <LibWeb/HTML/EventHandler.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/GlobalEventHandlers.h>
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#include <LibWeb/UIEvents/EventNames.h>
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namespace Web::HTML {
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#undef __ENUMERATE
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#define __ENUMERATE(attribute_name, event_name) \
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void GlobalEventHandlers::set_##attribute_name(HTML::EventHandler value) \
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{ \
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set_event_handler_attribute(event_name, move(value)); \
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} \
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HTML::EventHandler GlobalEventHandlers::attribute_name() \
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{ \
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return get_event_handler_attribute(event_name); \
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}
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ENUMERATE_GLOBAL_EVENT_HANDLERS(__ENUMERATE)
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#undef __ENUMERATE
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GlobalEventHandlers::~GlobalEventHandlers()
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{
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}
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void GlobalEventHandlers::set_event_handler_attribute(const FlyString& name, HTML::EventHandler value)
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{
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auto& self = global_event_handlers_to_event_target();
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RefPtr<DOM::EventListener> listener;
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if (!value.callback.is_null()) {
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listener = adopt_ref(*new DOM::EventListener(move(value.callback)));
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} else {
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StringBuilder builder;
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builder.appendff("function {}(event) {{\n{}\n}}", name, value.string);
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auto parser = JS::Parser(JS::Lexer(builder.string_view()));
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auto program = parser.parse_function_node<JS::FunctionExpression>();
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if (parser.has_errors()) {
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dbgln("Failed to parse script in event handler attribute '{}'", name);
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return;
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}
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auto* function = JS::ScriptFunction::create(self.script_execution_context()->interpreter().global_object(), name, program->body(), program->parameters(), program->function_length(), nullptr, false, false);
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VERIFY(function);
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listener = adopt_ref(*new DOM::EventListener(JS::make_handle(static_cast<JS::Function*>(function))));
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}
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if (listener) {
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for (auto& registered_listener : self.listeners()) {
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if (registered_listener.event_name == name && registered_listener.listener->is_attribute()) {
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self.remove_event_listener(name, registered_listener.listener);
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break;
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}
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}
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self.add_event_listener(name, listener.release_nonnull());
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}
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}
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HTML::EventHandler GlobalEventHandlers::get_event_handler_attribute(const FlyString& name)
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{
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auto& self = global_event_handlers_to_event_target();
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for (auto& listener : self.listeners()) {
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if (listener.event_name == name && listener.listener->is_attribute()) {
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return HTML::EventHandler { JS::make_handle(&listener.listener->function()) };
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}
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}
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return {};
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}
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}
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