map.cpp

/***************************************************************************
 *   Copyright (C) 2005-2008 by the FIFE team                              *
 *   http://www.fifengine.de                                               *
 *   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 <string>

// 3rd party library includes
#include <boost/lexical_cast.hpp>

// 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/base/exception.h"
#include "util/structures/purge.h"
#include "util/structures/rect.h"
#include "view/camera.h"
#include "view/rendererbase.h"
#include "video/renderbackend.h"

#include "map.h"
#include "layer.h"

namespace FIFE {

    Map::Map(const std::string& identifier, RenderBackend* renderBackend,
            const std::vector<RendererBase*>& renderers, TimeProvider* tp_master):
        m_id(identifier),
        m_filename(""),
        m_timeprovider(tp_master),
        m_changelisteners(),
        m_changedlayers(),
        m_renderbackend(renderBackend),
        m_renderers(renderers),
        m_changed(false){
    }

    Map::~Map() {
        // remove all cameras
        std::vector<Camera*>::iterator iter = m_cameras.begin();
        for ( ; iter != m_cameras.end(); ++iter) {
            delete *iter;
        }
        m_cameras.clear();

        deleteLayers();
    }

    Layer* Map::getLayer(const std::string& id) {
        std::list<Layer*>::const_iterator it = m_layers.begin();
        for(; it != m_layers.end(); ++it) {
            if((*it)->getId() == id)
                return *it;
        }

        throw NotFound(id);
    }

    uint32_t Map::getLayerCount() const {
        return m_layers.size();
    }

    Layer* Map::createLayer(const std::string& identifier, CellGrid* grid) {
        std::list<Layer*>::const_iterator it = m_layers.begin();
        for(; it != m_layers.end(); ++it) {
            if(identifier == (*it)->getId())
                throw NameClash(identifier);
        }

        Layer* layer = new Layer(identifier, this, grid);
        m_layers.push_back(layer);
        m_changed = true;
        std::vector<MapChangeListener*>::iterator i = m_changelisteners.begin();
        while (i != m_changelisteners.end()) {
            (*i)->onLayerCreate(this, layer);
            ++i;
        }

        return layer;
    }

    void Map::deleteLayer(Layer* layer) {
        std::list<Layer*>::iterator it = m_layers.begin();
        for(; it != m_layers.end(); ++it) {
            if((*it) == layer) {
                std::vector<MapChangeListener*>::iterator i = m_changelisteners.begin();
                while (i != m_changelisteners.end()) {
                    (*i)->onLayerDelete(this, layer);
                    ++i;
                }
                delete layer;
                m_layers.erase(it);
                return ;
            }
        }
        m_changed = true;
    }

    void Map::deleteLayers() {
        std::list<Layer*>::iterator it = m_layers.begin();
        for(; it != m_layers.end(); ++it) {
            std::vector<MapChangeListener*>::iterator i = m_changelisteners.begin();
            while (i != m_changelisteners.end()) {
                (*i)->onLayerDelete(this, *it);
                ++i;
            }
        }
        purge(m_layers);
        m_layers.clear();
    }

    void Map::getMinMaxCoordinates(ExactModelCoordinate& min, ExactModelCoordinate& max) {
        Location lmin;
        Location lmax;
        std::list<Layer*>::iterator it = m_layers.begin();
        Layer* layer = *it;
        for (; it != m_layers.end(); ++it) {
            ModelCoordinate newMin, newMax;
            (*it)->getMinMaxCoordinates(newMin, newMax, layer);

            if (newMin.x < min.x) {
                min.x = newMin.x;
            }
            if (newMax.x > max.x) {
                max.x = newMax.x;
            }
            if (newMin.y < min.y) {
                min.y = newMin.y;
            }
            if (newMax.y > max.y) {
                max.y = newMax.y;
            }
        }
        lmin.setLayer(layer);
        lmax.setLayer(layer);
        lmin.setExactLayerCoordinates(min);
        lmax.setExactLayerCoordinates(max);

        min = lmin.getMapCoordinates();
        max = lmax.getMapCoordinates();
    }

    bool Map::update() {
        m_changedlayers.clear();
        std::list<Layer*>::iterator it = m_layers.begin();
        for(; it != m_layers.end(); ++it) {
            if ((*it)->update()) {
                m_changedlayers.push_back(*it);
            }
        }
        if (!m_changedlayers.empty()) {
            std::vector<MapChangeListener*>::iterator i = m_changelisteners.begin();
            while (i != m_changelisteners.end()) {
                (*i)->onMapChanged(this, m_changedlayers);
                ++i;
            }
        }

        // loop over cameras and update if enabled
        std::vector<Camera*>::iterator camIter = m_cameras.begin();
        for ( ; camIter != m_cameras.end(); ++camIter) {
            if ((*camIter)->isEnabled()) {
                (*camIter)->update();
                (*camIter)->render();
            }
        }

        bool retval = m_changed;
        m_changed = false;
        return retval;
    }

    void Map::addChangeListener(MapChangeListener* listener) {
        m_changelisteners.push_back(listener);
    }

    void Map::removeChangeListener(MapChangeListener* listener) {
        std::vector<MapChangeListener*>::iterator i = m_changelisteners.begin();
        while (i != m_changelisteners.end()) {
            if ((*i) == listener) {
                m_changelisteners.erase(i);
                return;
            }
            ++i;
        }
    }

    Camera* Map::addCamera(const std::string &id, Layer *layer, const Rect& viewport) {
        if (layer == NULL) {
            throw NotSupported("Must have valid layer for camera");
        }

        if (getCamera(id)) {
            std::string errorStr = "Camera: " + id + " already exists";
            throw NameClash(errorStr);
        }

        // create new camera and add to list of cameras
        Camera* camera = new Camera(id, layer, viewport, m_renderbackend);
        m_cameras.push_back(camera);

        std::vector<RendererBase*>::iterator iter = m_renderers.begin();
        for ( ; iter != m_renderers.end(); ++iter) {
            camera->addRenderer((*iter)->clone());
        }

        return camera;
    }

    void Map::removeCamera(const std::string &id) {
        std::vector<Camera*>::iterator iter = m_cameras.begin();
        for ( ; iter != m_cameras.end(); ++iter) {
            if ((*iter)->getId() == id) {
                // camera has been found delete it
                delete *iter;

                // now remove it from the vector
                // note this invalidates iterators, but we do not need
                // to worry about it in this case since we are done
                m_cameras.erase(iter);

                break;
            }
        }
    }

    Camera* Map::getCamera(const std::string &id) {
        std::vector<Camera*>::iterator iter = m_cameras.begin();
        for ( ; iter != m_cameras.end(); ++iter) {
            if ((*iter)->getId() == id) {
                return *iter;
            }
        }

        return NULL;
    }

    const std::vector<Camera*>& Map::getCameras() const {
        return m_cameras;
    }

} //FIFE