/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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.
 *
 */

#ifndef HTMLFormElement_h
#define HTMLFormElement_h

#include "core/html/HTMLElement.h"
#include "core/html/HTMLFormControlElement.h"
#include "core/html/forms/CheckedRadioButtons.h"
#include "core/loader/FormState.h"
#include "core/loader/FormSubmission.h"
#include "wtf/OwnPtr.h"

namespace WTF{
class TextEncoding;
}

namespace WebCore {

class Event;
class FormAssociatedElement;
class FormData;
class HTMLFormControlElement;
class HTMLImageElement;
class HTMLInputElement;

class HTMLFormElement FINAL : public HTMLElement {
public:
    static PassRefPtr<HTMLFormElement> create(Document&);
    virtual ~HTMLFormElement();

    PassRefPtr<HTMLCollection> elements();
    void getNamedElements(const AtomicString&, Vector<RefPtr<Node> >&);

    unsigned length() const;
    Node* item(unsigned index);

    String enctype() const { return m_attributes.encodingType(); }
    void setEnctype(const AtomicString&);

    String encoding() const { return m_attributes.encodingType(); }
    void setEncoding(const AtomicString& value) { setEnctype(value); }

    bool shouldAutocomplete() const;

    // FIXME: Should rename these two functions to say "form control" or "form-associated element" instead of "form element".
    void registerFormElement(FormAssociatedElement&);
    void removeFormElement(FormAssociatedElement*);

    void registerImgElement(HTMLImageElement*);
    void removeImgElement(HTMLImageElement*);

    bool prepareForSubmission(Event*);
    void submit();
    void submitFromJavaScript();
    void reset();

    void setDemoted(bool);

    void submitImplicitly(Event*, bool fromImplicitSubmissionTrigger);
    bool formWouldHaveSecureSubmission(const String& url);

    String name() const;

    bool noValidate() const;

    const AtomicString& action() const;
    void setAction(const AtomicString&);

    String method() const;
    void setMethod(const AtomicString&);

    virtual String target() const;

    bool wasUserSubmitted() const;

    HTMLFormControlElement* defaultButton() const;

    bool checkValidity();
    bool checkValidityWithoutDispatchingEvents();

    enum AutocompleteResult {
        AutocompleteResultSuccess,
        AutocompleteResultErrorDisabled,
        AutocompleteResultErrorCancel,
        AutocompleteResultErrorInvalid,
    };

    void requestAutocomplete();
    void finishRequestAutocomplete(AutocompleteResult);

    DEFINE_ATTRIBUTE_EVENT_LISTENER(autocomplete);
    DEFINE_ATTRIBUTE_EVENT_LISTENER(autocompleteerror);

    CheckedRadioButtons& checkedRadioButtons() { return m_checkedRadioButtons; }

    const Vector<FormAssociatedElement*>& associatedElements() const { return m_associatedElements; }
    const Vector<HTMLImageElement*>& imageElements() const { return m_imageElements; }

    void getTextFieldValues(StringPairVector& fieldNamesAndValues) const;
    void anonymousNamedGetter(const AtomicString& name, bool&, RefPtr<NodeList>&, bool&, RefPtr<Node>&);

private:
    explicit HTMLFormElement(Document&);

    virtual bool rendererIsNeeded(const RenderStyle&);
    virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
    virtual void removedFrom(ContainerNode*) OVERRIDE;
    virtual void finishParsingChildren() OVERRIDE;

    virtual void handleLocalEvents(Event*);

    virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
    virtual bool isURLAttribute(const Attribute&) const OVERRIDE;

    virtual bool shouldRegisterAsNamedItem() const OVERRIDE { return true; }

    virtual void copyNonAttributePropertiesFromElement(const Element&) OVERRIDE;

    void submitDialog(PassRefPtr<FormSubmission>);
    void submit(Event*, bool activateSubmitButton, bool processingUserGesture, FormSubmissionTrigger);

    void scheduleFormSubmission(PassRefPtr<FormSubmission>);

    unsigned formElementIndexWithFormAttribute(Element*, unsigned rangeStart, unsigned rangeEnd);
    unsigned formElementIndex(FormAssociatedElement&);

    // Returns true if the submission should proceed.
    bool validateInteractively(Event*);

    // Validates each of the controls, and stores controls of which 'invalid'
    // event was not canceled to the specified vector. Returns true if there
    // are any invalid controls in this form.
    bool checkInvalidControlsAndCollectUnhandled(Vector<RefPtr<FormAssociatedElement> >*, HTMLFormControlElement::CheckValidityDispatchEvents = HTMLFormControlElement::CheckValidityDispatchEventsAllowed);

    Node* elementFromPastNamesMap(const AtomicString&) const;
    void addToPastNamesMap(Node*, const AtomicString& pastName);
    void removeFromPastNamesMap(HTMLElement&);

    typedef HashMap<AtomicString, RefPtr<Node> > PastNamesMap;

    FormSubmission::Attributes m_attributes;
    OwnPtr<PastNamesMap> m_pastNamesMap;

    CheckedRadioButtons m_checkedRadioButtons;

    unsigned m_associatedElementsBeforeIndex;
    unsigned m_associatedElementsAfterIndex;
    Vector<FormAssociatedElement*> m_associatedElements;
    Vector<HTMLImageElement*> m_imageElements;

    bool m_wasUserSubmitted;
    bool m_isSubmittingOrPreparingForSubmission;
    bool m_shouldSubmit;

    bool m_isInResetFunction;

    bool m_wasDemoted;

    void requestAutocompleteTimerFired(Timer<HTMLFormElement>*);

    Vector<RefPtr<Event> > m_pendingAutocompleteEvents;
    Timer<HTMLFormElement> m_requestAutocompleteTimer;
};

DEFINE_NODE_TYPE_CASTS(HTMLFormElement, hasTagName(HTMLNames::formTag));

} // namespace WebCore

#endif // HTMLFormElement_h