// Clipboard.cpp

#include <app/Clipboard.h>

#include "Clipboard.h"

/*!
        \class Clipboard
        \brief Server-side representation of a clipboard.
*/

// constructor
/*!     \brief Creates and initializes a Clipboard.
        \param name The name of the clipboard.
*/
Clipboard::Clipboard(const char *name)
        : fName(name),
          fData(B_SIMPLE_DATA),
          fDataSource(),
          fCount(0),
          fWatchingService()
{
}

// destructor
/*!     \brief Frees all resources associate with this object.
*/
Clipboard::~Clipboard()
{
}

// SetData
/*!     \brief Sets the clipboard's data.

        Also notifies all watchers that the clipboard data have changed.

        \param data The new clipboard data.
        \param dataSource The clipboards new data source.
*/
void
Clipboard::SetData(const BMessage *data, BMessenger dataSource)
{
        fData = *data;
        fDataSource = dataSource;
        fCount++;
        NotifyWatchers();
}

// Data
/*!     \brief Returns the clipboard's data.
        \return The clipboard's data.
*/
const BMessage *
Clipboard::Data() const
{
        return &fData;
}

// DataSource
/*!     \brief Returns the clipboard's data source.
        \return The clipboard's data source.
*/
BMessenger
Clipboard::DataSource() const
{
        return fDataSource;
}

// Count
int32
Clipboard::Count() const
{
        return fCount;
}


// AddWatcher
/*!     \brief Adds a new watcher for this clipboard.
        \param watcher The messenger referring to the new watcher.
        \return \c true, if the watcher could be added successfully,
                        \c false otherwise.
*/
bool
Clipboard::AddWatcher(BMessenger watcher)
{
        return fWatchingService.AddWatcher(watcher);
}

// RemoveWatcher
/*!     \brief Removes a watcher from this clipboard.
        \param watcher The watcher to be removed.
        \return \c true, if the supplied watcher was watching the clipboard,
                        \c false otherwise.
*/
bool
Clipboard::RemoveWatcher(BMessenger watcher)
{
        return fWatchingService.RemoveWatcher(watcher);
}

// NotifyWatchers
/*!     \brief Sends a notification message that the clipboard data have changed
                   to all associated watchers.
*/
void
Clipboard::NotifyWatchers()
{
        BMessage message(B_CLIPBOARD_CHANGED);
        fWatchingService.NotifyWatchers(&message, NULL);
}