#include "toonzqt/tselectionhandle.h"

#include "toonzqt/selection.h"

//=============================================================================

// TSelectionHandle

//-----------------------------------------------------------------------------

TSelectionHandle::TSelectionHandle() { m_selectionStack.push_back(0); }

//-----------------------------------------------------------------------------

TSelectionHandle::~TSelectionHandle() {}

//-----------------------------------------------------------------------------

TSelection *TSelectionHandle::getSelection() const {

  return m_selectionStack.back();

}

//-----------------------------------------------------------------------------

void TSelectionHandle::setSelection(TSelection *selection) {

  if (getSelection() == selection) return;

  TSelection *oldSelection = getSelection();

  if (oldSelection) {

    oldSelection->selectNone();

    // disable selection related commands

    CommandManager *commandManager = CommandManager::instance();

    int i;

    for (i = 0; i < (int)m_enabledCommandIds.size(); i++)

      commandManager->setHandler(m_enabledCommandIds[i].c_str(), 0);

    m_enabledCommandIds.clear();

  }

  m_selectionStack.back() = selection;

  if (selection) selection->enableCommands();

  emit selectionSwitched(oldSelection, selection);

}

//-----------------------------------------------------------------------------

void TSelectionHandle::pushSelection() {

  // NOTE

  //  We push 0, and NOT a copy of the last item. I think this is done on

  //  purpose,

  //  as having it copied and then selecting a different one invokes

  //  selectNone()

  //  on the former.

  m_selectionStack.push_back(0);

}

//-----------------------------------------------------------------------------

void TSelectionHandle::popSelection() {

  if (m_selectionStack.size() > 1) m_selectionStack.pop_back();

  TSelection *selection = getSelection();

  if (selection) selection->enableCommands();

}

//-----------------------------------------------------------------------------

void TSelectionHandle::enableCommand(std::string cmdId,

                                     CommandHandlerInterface *handler) {

  CommandManager::instance()->setHandler(cmdId.c_str(), handler);

  m_enabledCommandIds.push_back(cmdId);

}

//-----------------------------------------------------------------------------

void TSelectionHandle::notifySelectionChanged() {

  emit selectionChanged(m_selectionStack.back());

}

//-----------------------------------------------------------------------------

TSelectionHandle *TSelectionHandle::getCurrent() {

  static TSelectionHandle _currentSelection;

  return &_currentSelection;

}