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ladybird/Userland/Libraries/LibWeb/HTML/GlobalEventHandlers.cpp

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LibWeb: Basic implementation of global event handlers :^) Document and HTMLElement now inherit from HTML::GlobalEventHandlers which allows them to support "onfoo" event handler attributes. These are assignable both via IDL attributes and content attributes. Event listeners constructed this way get a special "attribute" flag on them so we know which one to replace if you reassign them. This also allows them to coexist with EventTarget.addEventListener(). This is all a bit sloppy, but it works decently for a first cut. The Window object should also inherit GlobalEventHandlers, but since we don't generate it from IDL, I haven't taken that step here. Also this would be a lot nicer if we supported IDL mixins.
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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
LibWeb: Basic implementation of global event handlers :^) Document and HTMLElement now inherit from HTML::GlobalEventHandlers which allows them to support "onfoo" event handler attributes. These are assignable both via IDL attributes and content attributes. Event listeners constructed this way get a special "attribute" flag on them so we know which one to replace if you reassign them. This also allows them to coexist with EventTarget.addEventListener(). This is all a bit sloppy, but it works decently for a first cut. The Window object should also inherit GlobalEventHandlers, but since we don't generate it from IDL, I haven't taken that step here. Also this would be a lot nicer if we supported IDL mixins.
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*/
LibWeb: Implement WindowEventHandlers
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#include <LibWeb/DOM/EventTarget.h>
LibWeb: Basic implementation of global event handlers :^) Document and HTMLElement now inherit from HTML::GlobalEventHandlers which allows them to support "onfoo" event handler attributes. These are assignable both via IDL attributes and content attributes. Event listeners constructed this way get a special "attribute" flag on them so we know which one to replace if you reassign them. This also allows them to coexist with EventTarget.addEventListener(). This is all a bit sloppy, but it works decently for a first cut. The Window object should also inherit GlobalEventHandlers, but since we don't generate it from IDL, I haven't taken that step here. Also this would be a lot nicer if we supported IDL mixins.
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#include <LibWeb/HTML/EventNames.h>
#include <LibWeb/HTML/GlobalEventHandlers.h>
#include <LibWeb/UIEvents/EventNames.h>
namespace Web::HTML {
#undef __ENUMERATE
LibWeb: Move event listeners, handlers and callbacks to the GC heap 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.
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#define __ENUMERATE(attribute_name, event_name) \
LibWeb: Move CallbackType from Bindings/ to WebIDL/ Let's stop putting generic types and AOs from the Web IDL spec into the Bindings namespace and directory in LibWeb, and instead follow our usual naming rules of 'directory = namespace = spec name'. The IDL namespace is already used by LibIDL, so Web::WebIDL seems like a good choice.
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void GlobalEventHandlers::set_##attribute_name(WebIDL::CallbackType* value) \
LibWeb: Move event listeners, handlers and callbacks to the GC heap 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.
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{ \
global_event_handlers_to_event_target(event_name).set_event_handler_attribute(event_name, value); \
} \
LibWeb: Move CallbackType from Bindings/ to WebIDL/ Let's stop putting generic types and AOs from the Web IDL spec into the Bindings namespace and directory in LibWeb, and instead follow our usual naming rules of 'directory = namespace = spec name'. The IDL namespace is already used by LibIDL, so Web::WebIDL seems like a good choice.
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WebIDL::CallbackType* GlobalEventHandlers::attribute_name() \
LibWeb: Move event listeners, handlers and callbacks to the GC heap 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.
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{ \
return global_event_handlers_to_event_target(event_name).event_handler_attribute(event_name); \
LibWeb: Basic implementation of global event handlers :^) Document and HTMLElement now inherit from HTML::GlobalEventHandlers which allows them to support "onfoo" event handler attributes. These are assignable both via IDL attributes and content attributes. Event listeners constructed this way get a special "attribute" flag on them so we know which one to replace if you reassign them. This also allows them to coexist with EventTarget.addEventListener(). This is all a bit sloppy, but it works decently for a first cut. The Window object should also inherit GlobalEventHandlers, but since we don't generate it from IDL, I haven't taken that step here. Also this would be a lot nicer if we supported IDL mixins.
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}
ENUMERATE_GLOBAL_EVENT_HANDLERS(__ENUMERATE)
#undef __ENUMERATE
Libraries: Use default constructors/destructors in LibWeb https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
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GlobalEventHandlers::~GlobalEventHandlers() = default;
LibWeb: Basic implementation of global event handlers :^) Document and HTMLElement now inherit from HTML::GlobalEventHandlers which allows them to support "onfoo" event handler attributes. These are assignable both via IDL attributes and content attributes. Event listeners constructed this way get a special "attribute" flag on them so we know which one to replace if you reassign them. This also allows them to coexist with EventTarget.addEventListener(). This is all a bit sloppy, but it works decently for a first cut. The Window object should also inherit GlobalEventHandlers, but since we don't generate it from IDL, I haven't taken that step here. Also this would be a lot nicer if we supported IDL mixins.
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}
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