/******************************************************************************
 *
 *  utf8cantillation.cpp -	SWFilter descendant to remove UTF-8 Hebrew
 *				cantillation
 *
 * $Id: utf8cantillation.cpp 2980 2013-09-14 21:51:47Z scribe $
 *
 * Copyright 2001-2013 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 <stdlib.h>
#include <stdio.h>
#include <utf8cantillation.h>


SWORD_NAMESPACE_START

namespace {

	static const char oName[] = "Hebrew Cantillation";
	static const char oTip[]  = "Toggles Hebrew Cantillation Marks";

	static const StringList *oValues() {
		static const SWBuf choices[3] = {"Off", "On", ""};
		static const StringList oVals(&choices[0], &choices[2]);
		return &oVals;
	}
}


UTF8Cantillation::UTF8Cantillation() : SWOptionFilter(oName, oTip, oValues()) {
}


UTF8Cantillation::~UTF8Cantillation(){};


char UTF8Cantillation::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
	if (!option) {
		//The UTF-8 range 0xD6 0x90 to 0xD6 0xAF and 0xD7 0x84 consist of Hebrew cantillation marks so block those out.
		SWBuf orig = text;
		const unsigned char* from = (unsigned char*)orig.c_str();
		for (text = ""; *from; from++) {
			if (*from != 0xD6) {
				if (*from == 0xD7 && *(from + 1) == 0x84) {
					from++;
				}
				else {
					text += *from;
				}
			}
			else if (*(from + 1) < 0x90 || *(from + 1) > 0xAF) {
				text += *from;
				from++;
				text += *from;
			}
			else {
				from++;
			}
		}
	}
	return 0;
}

SWORD_NAMESPACE_END