/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* vim:expandtab:shiftwidth=4:tabstop=4:

 */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __nsClipboard_h_

#define __nsClipboard_h_

#include "nsIClipboard.h"

#include "nsIObserver.h"

#include "nsIBinaryOutputStream.h"

#include <gtk/gtk.h>

class nsRetrievalContext {

public:

    // Get actual clipboard content (GetClipboardData/GetClipboardText)

    // which has to be released by ReleaseClipboardData().

    virtual const char* GetClipboardData(const char* aMimeType,

                                         int32_t aWhichClipboard,

                                         uint32_t* aContentLength) = 0;

    virtual const char* GetClipboardText(int32_t aWhichClipboard) = 0;

    virtual void ReleaseClipboardData(const char* aClipboardData) = 0;

    // Get data mime types which can be obtained from clipboard.

    // The returned array has to be released by g_free().

    virtual GdkAtom* GetTargets(int32_t aWhichClipboard,

                                int* aTargetNum) = 0;

    virtual bool HasSelectionSupport(void) = 0;

    virtual ~nsRetrievalContext() {};

};

class nsClipboard : public nsIClipboard,

                    public nsIObserver

{

public:

    nsClipboard();

    NS_DECL_ISUPPORTS

    NS_DECL_NSIOBSERVER

    NS_DECL_NSICLIPBOARD

    // Make sure we are initialized, called from the factory

    // constructor

    nsresult  Init              (void);

    // Someone requested the selection

    void   SelectionGetEvent    (GtkClipboard     *aGtkClipboard,

                                 GtkSelectionData *aSelectionData);

    void   SelectionClearEvent  (GtkClipboard     *aGtkClipboard);

private:

    virtual ~nsClipboard();

    // Save global clipboard content to gtk

    nsresult         Store            (void);

    // Get our hands on the correct transferable, given a specific

    // clipboard

    nsITransferable *GetTransferable  (int32_t aWhichClipboard);

    // Send clipboard data by nsITransferable

    void             SetTransferableData(nsITransferable* aTransferable,

                                         nsCString& aFlavor,

                                         const char* aClipboardData,

                                         uint32_t aClipboardDataLength);

    // Hang on to our owners and transferables so we can transfer data

    // when asked.

    nsCOMPtr<nsIClipboardOwner>    mSelectionOwner;

    nsCOMPtr<nsIClipboardOwner>    mGlobalOwner;

    nsCOMPtr<nsITransferable>      mSelectionTransferable;

    nsCOMPtr<nsITransferable>      mGlobalTransferable;

    nsAutoPtr<nsRetrievalContext>  mContext;

};

extern const int kClipboardTimeout;

GdkAtom GetSelectionAtom(int32_t aWhichClipboard);

#endif /* __nsClipboard_h_ */