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ladybird/Libraries/LibWeb/Bindings/EventTargetWrapper.cpp

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LibWeb: Add missing copyright headers
2020-03-18 20:20:35 +01:00
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
LibJS: Use FlyString for identifiers This makes variable and property lookups a lot faster since comparing two FlyStrings is O(1).
2020-03-22 11:07:55 +01:00
#include <AK/FlyString.h>
LibJS: Rework how native functions are called to improve |this| value 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.
2020-03-28 22:48:35 +01:00
#include <AK/Function.h>
#include <LibJS/Interpreter.h>
LibWeb: Start working on DOM event support This patch adds the EventTarget class and makes Node inherit from it. You can register event listeners on an EventTarget, and when you call dispatch_event() on it, the event listeners will get invoked. An event listener is basically a wrapper around a JS::Function*. This is pretty far from how DOM events should eventually work, but it's a place to start and we'll build more on top of this. :^)
2020-03-18 15:22:31 +01:00
#include <LibJS/Runtime/Function.h>
#include <LibWeb/Bindings/EventListenerWrapper.h>
#include <LibWeb/Bindings/EventTargetWrapper.h>
#include <LibWeb/DOM/EventListener.h>
#include <LibWeb/DOM/EventTarget.h>
namespace Web {
namespace Bindings {
EventTargetWrapper::EventTargetWrapper(EventTarget& impl)
: m_impl(impl)
{
LibJS+LibWeb: Move native JS functions into dedicated member functions Instead of implementing every native function as a lambda function, use static member functions instead. This makes it easier to navigate the code + backtraces look nicer. :^)
2020-03-28 23:10:37 +01:00
put_native_function("addEventListener", add_event_listener);
LibWeb: Start working on DOM event support This patch adds the EventTarget class and makes Node inherit from it. You can register event listeners on an EventTarget, and when you call dispatch_event() on it, the event listeners will get invoked. An event listener is basically a wrapper around a JS::Function*. This is pretty far from how DOM events should eventually work, but it's a place to start and we'll build more on top of this. :^)
2020-03-18 15:22:31 +01:00
}
EventTargetWrapper::~EventTargetWrapper()
{
}
LibJS+LibWeb: Move native JS functions into dedicated member functions Instead of implementing every native function as a lambda function, use static member functions instead. This makes it easier to navigate the code + backtraces look nicer. :^)
2020-03-28 23:10:37 +01:00
JS::Value EventTargetWrapper::add_event_listener(JS::Interpreter& interpreter)
{
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();
auto event_name = arguments[0].to_string();
ASSERT(arguments[1].is_object());
LibJS: Make Value::as_object() return Object& Let's move towards using references over pointers in LibJS as well. I had originally steered away from it because that's how I've seen things done in other engines. But this is not the other engines. :^)
2020-04-01 22:18:47 +02:00
ASSERT(arguments[1].as_object().is_function());
auto& function = static_cast<JS::Function&>(const_cast<Object&>(arguments[1].as_object()));
auto listener = adopt(*new EventListener(JS::make_handle(&function)));
LibJS+LibWeb: Move native JS functions into dedicated member functions Instead of implementing every native function as a lambda function, use static member functions instead. This makes it easier to navigate the code + backtraces look nicer. :^)
2020-03-28 23:10:37 +01:00
static_cast<EventTargetWrapper*>(this_object)->impl().add_event_listener(event_name, move(listener));
return JS::js_undefined();
}
LibWeb: Start working on DOM event support This patch adds the EventTarget class and makes Node inherit from it. You can register event listeners on an EventTarget, and when you call dispatch_event() on it, the event listeners will get invoked. An event listener is basically a wrapper around a JS::Function*. This is pretty far from how DOM events should eventually work, but it's a place to start and we'll build more on top of this. :^)
2020-03-18 15:22:31 +01:00
}
}
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