third_party/WebKit/Source/core/dom/custom/V0CustomElementCallbackInvocation.cpp

/*
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 *    may be used to endorse or promote products derived from this
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#include "core/dom/custom/V0CustomElementCallbackInvocation.h"

#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/dom/custom/V0CustomElementScheduler.h"

namespace blink {

class AttachedDetachedInvocation final : public V0CustomElementCallbackInvocation {
public:
    AttachedDetachedInvocation(V0CustomElementLifecycleCallbacks*, V0CustomElementLifecycleCallbacks::CallbackType which);

private:
    void dispatch(Element*) override;

    V0CustomElementLifecycleCallbacks::CallbackType m_which;
};

AttachedDetachedInvocation::AttachedDetachedInvocation(V0CustomElementLifecycleCallbacks* callbacks, V0CustomElementLifecycleCallbacks::CallbackType which)
    : V0CustomElementCallbackInvocation(callbacks)
    , m_which(which)
{
    DCHECK(m_which == V0CustomElementLifecycleCallbacks::AttachedCallback || m_which == V0CustomElementLifecycleCallbacks::DetachedCallback);
}

void AttachedDetachedInvocation::dispatch(Element* element)
{
    switch (m_which) {
    case V0CustomElementLifecycleCallbacks::AttachedCallback:
        callbacks()->attached(element);
        break;
    case V0CustomElementLifecycleCallbacks::DetachedCallback:
        callbacks()->detached(element);
        break;
    default:
        ASSERT_NOT_REACHED();
    }
}

class AttributeChangedInvocation final : public V0CustomElementCallbackInvocation {
public:
    AttributeChangedInvocation(V0CustomElementLifecycleCallbacks*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue);

private:
    void dispatch(Element*) override;

    AtomicString m_name;
    AtomicString m_oldValue;
    AtomicString m_newValue;
};

AttributeChangedInvocation::AttributeChangedInvocation(V0CustomElementLifecycleCallbacks* callbacks, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue)
    : V0CustomElementCallbackInvocation(callbacks)
    , m_name(name)
    , m_oldValue(oldValue)
    , m_newValue(newValue)
{
}

void AttributeChangedInvocation::dispatch(Element* element)
{
    callbacks()->attributeChanged(element, m_name, m_oldValue, m_newValue);
}

class CreatedInvocation final : public V0CustomElementCallbackInvocation {
public:
    explicit CreatedInvocation(V0CustomElementLifecycleCallbacks* callbacks)
        : V0CustomElementCallbackInvocation(callbacks)
    {
    }

private:
    void dispatch(Element*) override;
    bool isCreatedCallback() const override { return true; }
};

void CreatedInvocation::dispatch(Element* element)
{
    if (element->inShadowIncludingDocument() && element->document().domWindow())
        V0CustomElementScheduler::scheduleCallback(callbacks(), element, V0CustomElementLifecycleCallbacks::AttachedCallback);
    callbacks()->created(element);
}

V0CustomElementCallbackInvocation* V0CustomElementCallbackInvocation::createInvocation(V0CustomElementLifecycleCallbacks* callbacks, V0CustomElementLifecycleCallbacks::CallbackType which)
{
    switch (which) {
    case V0CustomElementLifecycleCallbacks::CreatedCallback:
        return new CreatedInvocation(callbacks);

    case V0CustomElementLifecycleCallbacks::AttachedCallback:
    case V0CustomElementLifecycleCallbacks::DetachedCallback:
        return new AttachedDetachedInvocation(callbacks, which);
    default:
        ASSERT_NOT_REACHED();
        return nullptr;
    }
}

V0CustomElementCallbackInvocation* V0CustomElementCallbackInvocation::createAttributeChangedInvocation(V0CustomElementLifecycleCallbacks* callbacks, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue)
{
    return new AttributeChangedInvocation(callbacks, name, oldValue, newValue);
}

DEFINE_TRACE(V0CustomElementCallbackInvocation)
{
    visitor->trace(m_callbacks);
    V0CustomElementProcessingStep::trace(visitor);
}

} // namespace blink