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#include "gui/character_pad/selection_handler.h"

#include <QtGui/QApplication>
#include <QtGui/QClipboard>
#include <QtGui/QMessageBox>

#include "base/singleton.h"

namespace mozc {
namespace gui {
namespace {

class CopyToClipboardCallback : public SelectionCallbackInterface {
 public:
  void Select(const QString &str) {
    QClipboard *clipboard = QApplication::clipboard();
    if (clipboard == NULL) {
      return;
    }

    clipboard->setText(str, QClipboard::Clipboard);
    clipboard->setText(str, QClipboard::Selection);
    QMessageBox::information(NULL,
                             QObject::tr("Note"),
                             str + QObject::tr(" is sent to clipboard"));
  }
};

SelectionCallbackInterface *g_selection_callback = NULL;

SelectionCallbackInterface *GetSelectionCallback() {
  if (g_selection_callback == NULL) {
    return Singleton<CopyToClipboardCallback>::get();
  } else {
    return g_selection_callback;
  }
}
}  // namespace

void SelectionHandler::Select(const QString &str) {
  GetSelectionCallback()->Select(str);
}

void SelectionHandler::SetSelectionCallback(
    SelectionCallbackInterface *callback) {
  g_selection_callback = callback;
}
}  // namespace gui
}  // namespace mozc