/*

 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#include "config.h"

#include "JSHTMLCollection.h"

#include "AtomicString.h"

#include "HTMLCollection.h"

#include "HTMLOptionsCollection.h"

#include "HTMLAllCollection.h"

#include "JSDOMBinding.h"

#include "JSHTMLAllCollection.h"

#include "JSHTMLOptionsCollection.h"

#include "JSNode.h"

#include "JSNodeList.h"

#include "Node.h"

#include "StaticNodeList.h"

#include <wtf/Vector.h>

using namespace JSC;

namespace WebCore {

static JSValue getNamedItems(ExecState* exec, JSHTMLCollection* collection, const Identifier& propertyName)

{

    Vector<RefPtr<Node> > namedItems;

    collection->impl()->namedItems(identifierToAtomicString(propertyName), namedItems);

    if (namedItems.isEmpty())

        return jsUndefined();

    if (namedItems.size() == 1)

        return toJS(exec, collection->globalObject(), namedItems[0].get());

    // FIXME: HTML5 specifies that this should be a DynamicNodeList.

    // FIXME: HTML5 specifies that non-HTMLOptionsCollection collections should return

    // the first matching item instead of a NodeList.

    return toJS(exec, collection->globalObject(), StaticNodeList::adopt(namedItems).get());

}

// HTMLCollections are strange objects, they support both get and call,

// so that document.forms.item(0) and document.forms(0) both work.

static EncodedJSValue JSC_HOST_CALL callHTMLCollection(ExecState* exec)

{

    if (exec->argumentCount() < 1)

        return JSValue::encode(jsUndefined());

    // Do not use thisObj here. It can be the JSHTMLDocument, in the document.forms(i) case.

    JSHTMLCollection* jsCollection = static_cast<JSHTMLCollection*>(exec->callee());

    HTMLCollection* collection = jsCollection->impl();

    // Also, do we need the TypeError test here ?

    if (exec->argumentCount() == 1) {

        // Support for document.all(<index>) etc.

        bool ok;

        UString string = exec->argument(0).toString(exec);

        unsigned index = string.toUInt32(&ok, false);

        if (ok)

            return JSValue::encode(toJS(exec, jsCollection->globalObject(), collection->item(index)));

        // Support for document.images('<name>') etc.

        return JSValue::encode(getNamedItems(exec, jsCollection, Identifier(exec, string)));

    }

    // The second arg, if set, is the index of the item we want

    bool ok;

    UString string = exec->argument(0).toString(exec);

    unsigned index = exec->argument(1).toString(exec).toUInt32(&ok, false);

    if (ok) {

        String pstr = ustringToString(string);

        Node* node = collection->namedItem(pstr);

        while (node) {

            if (!index)

                return JSValue::encode(toJS(exec, jsCollection->globalObject(), node));

            node = collection->nextNamedItem(pstr);

            --index;

        }

    }

    return JSValue::encode(jsUndefined());

}

CallType JSHTMLCollection::getCallData(CallData& callData)

{

    callData.native.function = callHTMLCollection;

    return CallTypeHost;

}

bool JSHTMLCollection::canGetItemsForName(ExecState*, HTMLCollection* collection, const Identifier& propertyName)

{

    Vector<RefPtr<Node> > namedItems;

    collection->namedItems(identifierToAtomicString(propertyName), namedItems);

    return !namedItems.isEmpty();

}

JSValue JSHTMLCollection::nameGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)

{

    JSHTMLCollection* thisObj = static_cast<JSHTMLCollection*>(asObject(slotBase));

    return getNamedItems(exec, thisObj, propertyName);

}

JSValue JSHTMLCollection::item(ExecState* exec)

{

    bool ok;

    uint32_t index = exec->argument(0).toString(exec).toUInt32(&ok, false);

    if (ok)

        return toJS(exec, globalObject(), impl()->item(index));

    return getNamedItems(exec, this, Identifier(exec, exec->argument(0).toString(exec)));

}

JSValue JSHTMLCollection::namedItem(ExecState* exec)

{

    return getNamedItems(exec, this, Identifier(exec, exec->argument(0).toString(exec)));

}

JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, HTMLCollection* collection)

{

    if (!collection)

        return jsNull();

    DOMObject* wrapper = getCachedDOMObjectWrapper(exec, collection);

    if (wrapper)

        return wrapper;

    switch (collection->type()) {

        case SelectOptions:

            wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, HTMLOptionsCollection, collection);

            break;

        case DocAll:

            wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, HTMLAllCollection, collection);

            break;

        default:

            wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, HTMLCollection, collection);

            break;

    }

    return wrapper;

}

} // namespace WebCore