xref: /external/chromium_org/third_party/WebKit/Source/core/html/HTMLShadowElement.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 *
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#include "config.h"
#include "core/html/HTMLShadowElement.h"

#include "core/HTMLNames.h"
#include "core/dom/Document.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/inspector/ConsoleMessage.h"

namespace blink {

class Document;

inline HTMLShadowElement::HTMLShadowElement(Document& document)
    : InsertionPoint(HTMLNames::shadowTag, document)
{
}

DEFINE_NODE_FACTORY(HTMLShadowElement)

HTMLShadowElement::~HTMLShadowElement()
{
}

ShadowRoot* HTMLShadowElement::olderShadowRoot()
{
    ShadowRoot* containingRoot = containingShadowRoot();
    if (!containingRoot)
        return 0;

    document().updateDistributionForNodeIfNeeded(this);

    ShadowRoot* older = containingRoot->olderShadowRoot();
    if (!older || !older->shouldExposeToBindings() || older->shadowInsertionPointOfYoungerShadowRoot() != this)
        return 0;

    ASSERT(older->shouldExposeToBindings());
    return older;
}

Node::InsertionNotificationRequest HTMLShadowElement::insertedInto(ContainerNode* insertionPoint)
{
    if (insertionPoint->inDocument()) {
        // Warn if trying to reproject between user agent and author shadows.
        ShadowRoot* root = containingShadowRoot();
        if (root && root->olderShadowRoot() && root->type() != root->olderShadowRoot()->type()) {
            String message = String::format("<shadow> doesn't work for %s element host.", root->host()->tagName().utf8().data());
            document().addConsoleMessage(ConsoleMessage::create(RenderingMessageSource, WarningMessageLevel, message));
        }
    }
    return InsertionPoint::insertedInto(insertionPoint);
}

} // namespace blink