commandline.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// Standard C++ library includes
#include <cassert>

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/time/timeevent.h"
#include "util/time/timemanager.h"

#include "commandline.h"

namespace FIFE {
    using namespace fcn;


    CommandLine::CommandLine() : fcn::TextField(), m_history_position(0) {

        m_blinkTimer.setInterval(500);
        m_blinkTimer.setCallback(std::bind(&CommandLine::toggleCaretVisible,this));
        m_blinkTimer.start();

        m_suppressBlinkTimer.setInterval(2000);
        m_suppressBlinkTimer.setCallback(std::bind(&CommandLine::startBlinking,this));
    }

    CommandLine::~CommandLine() {
    }

    void CommandLine::toggleCaretVisible() {
        m_caretVisible = !m_caretVisible;
    }

    void CommandLine::stopBlinking() {
        m_suppressBlinkTimer.start();
        m_blinkTimer.stop();
        m_caretVisible = true;
    }

    void CommandLine::startBlinking() {
        m_suppressBlinkTimer.stop();
        m_blinkTimer.start();
    }

    void CommandLine::keyPressed(fcn::KeyEvent &keyEvent) {
        fcn::Key key = keyEvent.getKey();
        int32_t keyType = key.getValue();

        if (keyType == Key::Left && getCaretPosition() > 0)
        {
            TextField::keyPressed(keyEvent);
        }
        else if (keyType == Key::Right && getCaretPosition() < getText().size())
        {
            TextField::keyPressed(keyEvent);
        }
        else if (keyType == Key::Down && !m_history.empty())
        {
            if( m_history_position < m_history.size() ) {

                if( ++m_history_position == m_history.size() ) {
                    setText( m_cmdline );
                } else {
                    setText( m_history[m_history_position] );
                }
            };
        }
        else if (keyType == Key::Up && !m_history.empty())
        {
            if( m_history_position > 0 ) {
                if( m_history_position == m_history.size() ) {
                    m_cmdline = getText();
                }
                --m_history_position;
                setText( m_history[m_history_position] );
            };
        }
        else if (keyType == Key::Delete && getCaretPosition() < getText().size())
        {
            TextField::keyPressed(keyEvent);
        }
        else if (keyType  == Key::Backspace && getCaretPosition() > 0)
        {
            TextField::keyPressed(keyEvent);
        }
        else if (keyType == Key::Enter)
        {
            if( getText() != "" ) {
                if(m_callback) {
                    m_callback( getText() );
                }
                m_history.push_back( getText() );
                m_history_position = m_history.size();
                setText("");
            }
        }
        else if (keyType == Key::Home)
        {
            setCaretPosition(0);
        }
        else if (keyType == Key::End)
        {
            setCaretPosition(getText().size());
        }
        else if (key.isCharacter() || static_cast<uint32_t>(key.getValue()) > 255)
        {
            TextField::keyPressed(keyEvent);
        }
        stopBlinking();
        fixScroll();
    }

    void CommandLine::drawCaret(fcn::Graphics * graphics, int32_t x) {
        if( !m_caretVisible )
            return;

        graphics->setColor(getForegroundColor());
        graphics->drawLine(x, getHeight() - 2, x, 1);
        graphics->drawLine(x+1, getHeight() - 2, x+1, 1);
    }


    void CommandLine::setCallback(const type_callback& cb) {
        m_callback = cb;
    }

}