/*

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

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef DOMSelection_h

#define DOMSelection_h

#include <wtf/Forward.h>

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

namespace WebCore {

    class Frame;

    class Range;

    class Node;

    class String;

    class VisibleSelection;

    typedef int ExceptionCode;

    class DOMSelection : public RefCounted<DOMSelection> {

    public:

        static PassRefPtr<DOMSelection> create(Frame* frame) { return adoptRef(new DOMSelection(frame)); }

        Frame* frame() const;

        void disconnectFrame();

        // Safari Selection Object API

        // These methods return the valid equivalents of internal editing positions.

        Node* baseNode() const;

        Node* extentNode() const;

        int baseOffset() const;

        int extentOffset() const;

        String type() const;

        void setBaseAndExtent(Node* baseNode, int baseOffset, Node* extentNode, int extentOffset, ExceptionCode&);

        void setPosition(Node*, int offset, ExceptionCode&);

        void modify(const String& alter, const String& direction, const String& granularity);

        // Mozilla Selection Object API

        // In Firefox, anchor/focus are the equal to the start/end of the selection,

        // but reflect the direction in which the selection was made by the user.  That does

        // not mean that they are base/extent, since the base/extent don't reflect

        // expansion.

        // These methods return the valid equivalents of internal editing positions.

        Node* anchorNode() const;

        int anchorOffset() const;

        Node* focusNode() const;

        int focusOffset() const;

        bool isCollapsed() const;

        int rangeCount() const;

        void collapse(Node*, int offset, ExceptionCode&);

        void collapseToEnd();

        void collapseToStart();

        void extend(Node*, int offset, ExceptionCode&);

        PassRefPtr<Range> getRangeAt(int, ExceptionCode&);

        void removeAllRanges();

        void addRange(Range*);

        void deleteFromDocument();

        bool containsNode(const Node*, bool partlyContained) const;

        void selectAllChildren(Node*, ExceptionCode&);

        String toString();

        // Microsoft Selection Object API

        void empty();

    private:

        DOMSelection(Frame*);

        // Convenience method for accessors, does not NULL check m_frame.

        const VisibleSelection& visibleSelection() const;

        bool isValidForPosition(Node*) const;

        Frame* m_frame;

    };

} // namespace WebCore

#endif // DOMSelection_h