eliot/qt/player_widget.cpp

/*****************************************************************************
 * Eliot
 * Copyright (C) 2008 Olivier Teulière
 * Authors: Olivier Teulière <ipkiss @@ gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *****************************************************************************/

#include <QtGui/QLineEdit>
#include <QtGui/QHBoxLayout>
#include <QtGui/QValidator>
#include <QtCore/QStringList>

#include "player_widget.h"
#include "training_widget.h"
#include "play_word_mediator.h"
#include "qtcommon.h"
#include "public_game.h"
#include "player.h"
#include "pldrack.h"
#include "coord.h"
#include "coord_model.h"
#include "dic.h"
#include "debug.h"

#include "encoding.h"


/// Validator used for the "change letters" line edit
class ChangeValidator: public QValidator
{
public:
    explicit ChangeValidator(QObject *parent,
                             const QLineEdit &iLineEdit,
                             const Dictionary &iDic);
    virtual State validate(QString &input, int &pos) const;

private:
    const QLineEdit &m_lineEdit;
    const Dictionary &m_dic;
};


PlayerWidget::PlayerWidget(QWidget *parent, CoordModel &iCoordModel,
                           unsigned int iPlayerNb, PublicGame *iGame)
    : QWidget(parent), m_game(iGame), m_player(iPlayerNb)
{
    setupUi(this);

    // Use the mediator
    m_mediator = new PlayWordMediator(this, *lineEditPlay, *lineEditCoords,
                                      *pushButtonPlay, iCoordModel, iGame);
    QObject::connect(m_mediator, SIGNAL(gameUpdated()),
                     this, SIGNAL(gameUpdated()));
    QObject::connect(m_mediator, SIGNAL(notifyProblem(QString)),
                     this, SIGNAL(notifyProblem(QString)));

    if (m_game)
    {
        // Do not allow messing with AI players
        if (!m_game->getPlayer(m_player).isHuman())
            setEnabled(false);

        // Changing the rack is authorized only in training mode
        lineEditRack->setReadOnly(m_game->getMode() != PublicGame::kTRAINING);
    }
    if (m_game == NULL || m_game->getMode() != PublicGame::kFREEGAME)
    {
        // Hide the freegame-specific controls
        labelChange->hide();
        lineEditChange->hide();
        pushButtonChange->hide();
        pushButtonPass->hide();
    }
    else
    {
        lineEditChange->setValidator(new ChangeValidator(this, *lineEditRack,
                                                         m_game->getDic()));
    }

    refresh();
}


QSize PlayerWidget::sizeHint() const
{
    return QSize(100, 100);
}


void PlayerWidget::refresh()
{
    if (m_game == NULL)
    {
        lineEditRack->clear();
        return;
    }

    const PlayedRack &pld = m_game->getPlayer(m_player).getCurrentRack();
    lineEditRack->setText(qfw(pld.toString(PlayedRack::RACK_EXTRA)));
    lineEditPlay->clear();
    lineEditCoords->clear();
    lineEditChange->clear();

    if (!m_game->isLastTurn())
    {
        // Do not allow entering a move when displaying an old turn
        setEnabled(false);
    }
    else
    {
        // Do not allow messing with AI players or with players
        // who already played
        setEnabled(!m_game->hasPlayed(m_player) &&
                   m_game->getPlayer(m_player).isHuman());
    }
}


void PlayerWidget::on_pushButtonShuffle_clicked()
{
    m_game->shuffleRack();
    emit gameUpdated();
}


void PlayerWidget::on_lineEditChange_textChanged()
{
    pushButtonChange->setEnabled(lineEditChange->hasAcceptableInput() &&
                                 lineEditChange->text() != "");
    // For the letters to be in upper case
    lineEditChange->setText(lineEditChange->text().toUpper());
}


void PlayerWidget::on_lineEditChange_returnPressed()
{
    ASSERT(m_game->getMode() == PublicGame::kFREEGAME,
           "Trying to change letters while not in free game mode");

    pass(lineEditChange->text());
}


void PlayerWidget::on_pushButtonPass_clicked()
{
    ASSERT(m_game->getMode() == PublicGame::kFREEGAME,
           "Trying to pass while not in free game mode");

    pass("");
}


void PlayerWidget::pass(QString inputLetters)
{
    // Convert the input string into an internal one
    const wstring &letters =
        m_game->getDic().convertFromInput(qtw(inputLetters));

    // Pass the turn (and possibly change letters)
    int res = m_game->freeGamePass(letters);
    if (res == 0)
        emit gameUpdated();
    else
    {
        QString msg;
        if (inputLetters == "")
            msg = _q("Cannot pass turn:\n%1");
        else
            msg = _q("Cannot change letters '%1':\n%2").arg(inputLetters);
        if (res == 1)
            msg = msg.arg(_q("Changing letters is not allowed when there are less than 7 tiles left in the bag"));
        else if (res == 2)
            msg = msg.arg(_q("The rack of the current player does not contain all the listed letters"));
        else if (res == 3)
            msg = msg.arg(_q("The game is already finished!"));
        else if (res == 3)
            msg = msg.arg(_q("Some letters are invalid for the current dictionary"));
        else
            msg = msg.arg(_q("Unknown error"));
        emit notifyProblem(msg);
    }
}



ChangeValidator::ChangeValidator(QObject *parent,
                                 const QLineEdit &iLineEdit,
                                 const Dictionary &iDic)
    : QValidator(parent), m_lineEdit(iLineEdit), m_dic(iDic)
{
}


QValidator::State ChangeValidator::validate(QString &input, int &) const
{
    // The string is invalid if it contains invalid input characters
    const wistring &winput = qtw(input);
    if (!m_dic.validateInputChars(winput))
        return Invalid;

    // Convert the string to internal letters
    const wstring &intInput = m_dic.convertFromInput(winput);
    // The string is invalid if it contains characters not present
    // in the dictionary
    if (!m_dic.validateLetters(intInput))
        return Intermediate;

    const wstring &rack = m_dic.convertFromInput(qtw(m_lineEdit.text()));
    if (intInput.size() > rack.size())
        return Intermediate;
    // The letters to change must be in the rack
    // We convert back to QString objects, because their count() method is
    // very practical...
    QString qrack = qfw(rack);
    QString qinput = qfw(intInput);
    for (int i = 0; i < qinput.size(); ++i)
    {
        if (qinput.count(qinput[i], Qt::CaseInsensitive) >
            qrack.count(qinput[i], Qt::CaseInsensitive))
        {
            return Intermediate;
        }
    }
    return Acceptable;
}



PlayerTabWidget::PlayerTabWidget(CoordModel &iCoordModel, QWidget *parent)
    : QTabWidget(parent), m_coordModel(iCoordModel)
{
    QObject::connect(this, SIGNAL(currentChanged(int)),
                     this, SLOT(changeCurrentPlayer(int)));
}


void PlayerTabWidget::setGame(PublicGame *iGame)
{
    m_game = iGame;

    // Remove all the tabs
    int nbTabs = count();
    for (int i = 0; i < nbTabs; ++i)
    {
        setCurrentIndex(0);
        // Cut all the connections with the page (needed because removeTab()
        // doesn't really destroy the widget)
        disconnect(currentWidget());
        removeTab(0);
    }

    if (iGame != NULL)
    {
        // Training mode: use a dedicated widget
        if (iGame->getMode() == PublicGame::kTRAINING)
        {
            const Player &player = iGame->getPlayer(0);
            TrainingWidget *trWidget = new TrainingWidget(NULL, m_coordModel, iGame);
            QObject::connect(this, SIGNAL(refreshSignal()),
                             trWidget, SLOT(refresh()));
            // Forward signals to the outside
            QObject::connect(trWidget, SIGNAL(notifyProblem(QString)),
                             this, SIGNAL(notifyProblem(QString)));
            QObject::connect(trWidget, SIGNAL(notifyInfo(QString)),
                             this, SIGNAL(notifyInfo(QString)));
            QObject::connect(trWidget, SIGNAL(gameUpdated()),
                             this, SIGNAL(gameUpdated()));
            QObject::connect(trWidget, SIGNAL(rackUpdated(const QString&)),
                             this, SIGNAL(trainingRackUpdated(const QString&)));
            addTab(trWidget, qfw(player.getName()));
        }
        else
        {
            // Add one tab per player
            for (unsigned int i = 0; i < iGame->getNbPlayers(); ++i)
            {
                const Player &player = iGame->getPlayer(i);
                PlayerWidget *p = new PlayerWidget(NULL, m_coordModel, i, iGame);
                QObject::connect(this, SIGNAL(refreshSignal()), p, SLOT(refresh()));
                // Forward signals to the outside
                QObject::connect(p, SIGNAL(notifyProblem(QString)),
                                 this, SIGNAL(notifyProblem(QString)));
                QObject::connect(p, SIGNAL(gameUpdated()),
                                 this, SIGNAL(gameUpdated()));
                addTab(p, qfw(player.getName()));
                // Switching to a tab corresponding to an AI player
                // is forbidden
                if (!player.isHuman())
                    setTabEnabled(i, false);
            }
            setCurrentIndex(iGame->getCurrentPlayer().getId());
        }
    }
}


void PlayerTabWidget::refresh()
{
    if (m_game)
        setCurrentIndex(m_game->getCurrentPlayer().getId());
    emit refreshSignal();
}


void PlayerTabWidget::changeCurrentPlayer(int p)
{
    // This method is triggered somehow when creating a Duplicate game
    // after a FreeGame one. The next line avoids crashing in this case...
    if (m_game == NULL)
        return;

    m_coordModel.clear();

    // Change the active player when the active tab changes
    // (only in duplicate mode)
    if (m_game->getMode() == PublicGame::kDUPLICATE &&
        widget(p)->isEnabled())
    {
        m_game->duplicateSetPlayer(p);
    }
}