path: root/src/gui/help.cpp

/*
 *  The Mana World
 *  Copyright 2004 The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  The Mana World 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
 *  any later version.
 *
 *  The Mana World 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 The Mana World; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  $Id$
 */

#include "help.h"
#include "scrollarea.h"
#include "button.h"
#include "textbox.h"
#include "../log.h"
#include "../resources/resourcemanager.h"

HelpWindow::HelpWindow():
    Window("Help")
{
    setContentSize(455, 350);

    browserBox = new BrowserBox();
    browserBox->setOpaque(false);
    scrollArea = new ScrollArea(browserBox);
    okButton = new Button("Close");

    scrollArea->setDimension(gcn::Rectangle(
                5, 5, 445, 335 - okButton->getHeight()));
    okButton->setPosition(
            450 - okButton->getWidth(),
            345 - okButton->getHeight());

    okButton->setEventId("close");
    okButton->addActionListener(this);
    
    browserBox->setLinkHandler(this);

    add(scrollArea);
    add(okButton);

    setLocationRelativeTo(getParent());
}

HelpWindow::~HelpWindow()
{
    delete browserBox;
    delete okButton;
    delete scrollArea;
}

void HelpWindow::action(const std::string& eventId)
{
    setVisible(false);
}

void HelpWindow::handleLink(const std::string& link)
{
    std::string helpFile = link;
    loadHelp(helpFile);
}

void HelpWindow::loadHelp(const std::string &helpFile)
{
    browserBox->clearRows();
    
    loadFile("header");
    loadFile(helpFile);

    scrollArea->setVerticalScrollAmount(0);
    setVisible(true);
}

void HelpWindow::loadFile(const std::string &file)
{
    ResourceManager *resman = ResourceManager::getInstance();
    const std::string filePath = "help/" + file + ".txt";
    int contentsLength;
    char *fileContents = (char*)resman->loadFile(filePath, contentsLength);

    if (!fileContents)
    {
        logger->log("Couldn't load help file: %s", filePath.c_str());
        return;
    }

    // Reallocate and include terminating 0 character
    fileContents = (char*)realloc(fileContents, contentsLength + 1);
    fileContents[contentsLength] = '\0';

    // Tokenize and add each line separately
    char *line = strtok(fileContents, "\n");
    while (line != NULL)
    {
        browserBox->addRow(line);
        line = strtok(NULL, "\n");
    }

    free(fileContents);
}