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encfiltmgr.cpp

/******************************************************************************
 *  swencodingmgr.cpp   - implementaion of class EncodingFilterMgr, subclass of
 *                        used to transcode all module text to a requested
 *                        encoding.
 *
 * Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)
 *      CrossWire Bible Society
 *      P. O. Box 2528
 *      Tempe, AZ  85280-2528
 *
 * 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 version 2.
 *
 * 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.
 *
 */

#include <encfiltmgr.h>

#include <scsuutf8.h>
#include <latin1utf8.h>

#include <unicodertf.h>
#include <utf8latin1.h>
#include <utf8utf16.h>
#include <utf8html.h>

#include <swmgr.h>

/******************************************************************************
 * EncodingFilterMgr Constructor - initializes instance of EncodingFilterMgr
 *
 * ENT:
 *      enc - Encoding format to emit
 */

EncodingFilterMgr::EncodingFilterMgr (char enc)
                   : SWFilterMgr() {

        scsuutf8 = new SCSUUTF8();
        latin1utf8 = new Latin1UTF8();

        encoding = enc;

        switch (encoding) {
        case ENC_LATIN1:
                targetenc = new UTF8Latin1();
                break;
        case ENC_UTF16:
                targetenc = new UTF8UTF16();
                break;
        case ENC_RTF:
                targetenc = new UnicodeRTF();
                break;
        case ENC_HTML:
                targetenc = new UTF8HTML();
                break;
        default: // i.e. case ENC_UTF8
                targetenc = NULL;
        }
}

/******************************************************************************
 * EncodingFilterMgr Destructor - Cleans up instance of EncodingFilterMgr
 */
EncodingFilterMgr::~EncodingFilterMgr() {
        if (scsuutf8)
                delete scsuutf8;
        if (latin1utf8)
                delete latin1utf8;
        if (targetenc)
                delete targetenc;
}

void EncodingFilterMgr::AddRawFilters(SWModule *module, ConfigEntMap &section) {

        ConfigEntMap::iterator entry;

        string encoding = ((entry = section.find("Encoding")) != section.end()) ? (*entry).second : (string)"";
        if (encoding.empty() || !stricmp(encoding.c_str(), "Latin-1")) {
                module->AddRawFilter(latin1utf8);
        }
        else if (!stricmp(encoding.c_str(), "SCSU")) {
                module->AddRawFilter(scsuutf8);
        }
}

void EncodingFilterMgr::AddEncodingFilters(SWModule *module, ConfigEntMap &section) {
        if (targetenc)
                module->AddEncodingFilter(targetenc);
}

/******************************************************************************
 * EncodingFilterMgr::Encoding  - sets/gets encoding
 *
 * ENT: enc     - new encoding or 0 to simply get the current encoding
 *
 * RET: encoding
 */
char EncodingFilterMgr::Encoding(char enc) {
        if (enc && enc != encoding) {
                encoding = enc;
                SWFilter * oldfilter = targetenc;
                
                switch (encoding) {
                case ENC_LATIN1:
                        targetenc = new UTF8Latin1();
                        break;
                case ENC_UTF16:
                        targetenc = new UTF8UTF16();
                        break;
                case ENC_RTF:
                        targetenc = new UnicodeRTF();
                        break;
                case ENC_HTML:
                        targetenc = new UTF8HTML();
                        break;
                default: // i.e. case ENC_UTF8
                        targetenc = NULL;
                }

                ModMap::const_iterator module;

                if (oldfilter != targetenc) {
                        if (oldfilter) {
                                if (!targetenc) {
                                        for (module = getParentMgr()->Modules.begin(); module != getParentMgr()->Modules.end(); module++)
                                                module->second->RemoveRenderFilter(oldfilter);
                                }
                                else {
                                        for (module = getParentMgr()->Modules.begin(); module != getParentMgr()->Modules.end(); module++)
                                                module->second->ReplaceRenderFilter(oldfilter, targetenc);
                                }
                                delete oldfilter;
                        }
                        else if (targetenc) {
                                for (module = getParentMgr()->Modules.begin(); module != getParentMgr()->Modules.end(); module++)
                                        module->second->AddRenderFilter(targetenc);
                        }
                }

        }
        return encoding;
}

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