worldspawn/plugins/mapq3/parse.cpp

/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "parse.h"

#include <list>

#include "ientity.h"
#include "ibrush.h"
#include "ipatch.h"
#include "ieclass.h"
#include "iscriplib.h"
#include "scenelib.h"
#include "string/string.h"
#include "stringio.h"
#include "eclasslib.h"

inline MapImporter *Node_getMapImporter(scene::Node &node)
{
    return NodeTypeCast<MapImporter>::cast(node);
}


typedef std::list<std::pair<CopiedString, CopiedString> > KeyValues;

NodeSmartReference g_nullNode(NewNullNode());


NodeSmartReference Entity_create(EntityCreator &entityTable, EntityClass *entityClass, const KeyValues &keyValues)
{
    scene::Node &entity(entityTable.createEntity(entityClass));
    for (KeyValues::const_iterator i = keyValues.begin(); i != keyValues.end(); ++i) {
        Node_getEntity(entity)->setKeyValue((*i).first.c_str(), (*i).second.c_str());
    }
    return NodeSmartReference(entity);
}

NodeSmartReference
Entity_parseTokens(Tokeniser &tokeniser, EntityCreator &entityTable, const PrimitiveParser &parser, int index)
{
    NodeSmartReference entity(g_nullNode);
    KeyValues keyValues;
    const char *classname = "";

    int count_primitives = 0;
    while (1) {
        tokeniser.nextLine();
        const char *token = tokeniser.getToken();
        if (token == 0) {
            Tokeniser_unexpectedError(tokeniser, token, "#entity-token");
            return g_nullNode;
        }
        if (!strcmp(token, "}")) { // end entity
            if (entity == g_nullNode) {
                // entity does not have brushes
                entity = Entity_create(entityTable, GlobalEntityClassManager().findOrInsert(classname, false),
                                       keyValues);
            }
            return entity;
        } else if (!strcmp(token, "{")) { // begin primitive
            if (entity == g_nullNode) {
                // entity has brushes
                entity = Entity_create(entityTable, GlobalEntityClassManager().findOrInsert(classname, true),
                                       keyValues);
            }

            tokeniser.nextLine();

            NodeSmartReference primitive(parser.parsePrimitive(tokeniser));
            if (primitive == g_nullNode || !Node_getMapImporter(primitive)->importTokens(tokeniser)) {
                globalErrorStream() << "brush " << count_primitives << ": parse error\n";
                return g_nullNode;
            }

            scene::Traversable *traversable = Node_getTraversable(entity);
            if (Node_getEntity(entity)->isContainer() && traversable != 0) {
                traversable->insert(primitive);
            } else {
                globalErrorStream() << "entity " << index << ": type " << classname << ": discarding brush "
                                    << count_primitives << "\n";
            }
            ++count_primitives;
        } else // epair
        {
            CopiedString key(token);
            token = tokeniser.getToken();
            if (token == 0) {
                Tokeniser_unexpectedError(tokeniser, token, "#epair-value");
                return g_nullNode;
            }
            keyValues.push_back(KeyValues::value_type(key, token));
            if (string_equal(key.c_str(), "classname")) {
                classname = keyValues.back().second.c_str();
            }
        }
    }
    // unreachable code
    return g_nullNode;
}

void Map_Read(scene::Node &root, Tokeniser &tokeniser, EntityCreator &entityTable, const PrimitiveParser &parser)
{
    int count_entities = 0;
    for (;;) {
        tokeniser.nextLine();
        if (!tokeniser.getToken()) { // { or 0
            break;
        }

        NodeSmartReference entity(Entity_parseTokens(tokeniser, entityTable, parser, count_entities));

        if (entity == g_nullNode) {
            globalErrorStream() << "entity " << count_entities << ": parse error\n";
            return;
        }

        Node_getTraversable(root)->insert(entity);

        ++count_entities;
    }
}