/******************************************************************************
 *
 *  osismorph.cpp -	SWFilter descendant to hide or show morph tags
 *			in a OSIS module
 *
 * $Id$
 *
 * Copyright 2003-2013 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 <osismorph.h>

SWORD_NAMESPACE_START

namespace {

	static const char oName[] = "Morphological Tags";
	static const char oTip[]  = "Toggles Morphological Tags On and Off if they exist";

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

}

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


OSISMorph::~OSISMorph() {
}


char OSISMorph::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
	if (!option) {	// if we don't want morph tags
		char token[2048]; // cheese.  Fix.
		int tokpos = 0;
		bool intoken = false;
		SWBuf orig = text;
		const char *from = orig.c_str();
		
		//taken out of the loop for speed
		const char* start = 0;
		const char* end = 0;

		for (text = ""; *from; ++from) {
			if (*from == '<') {
				intoken = true;
				tokpos = 0;
				token[0] = 0;
				continue;
			}
			if (*from == '>') {	// process tokens
				intoken = false;
				
				if ((*token == 'w') && (token[1] == ' ')) {
					start = strstr(token+2, "morph=\""); //we leave out "w " at the start
					end = start ? strchr(start+7, '"') : 0; //search the end of the morph value

					if (start && end) { //start and end of the morph tag found
						text.append('<');
						text.append(token, start-token); //the text before the morph attr
						text.append(end+1); //text after the morph attr
						text.append('>');
						
						continue; //next loop
					}
				}
				
				text.append('<');
				text.append(token);
				text.append('>');
				
				continue;
			}
			if (intoken) {
				if (tokpos < 2045) {
					token[tokpos++] = *from;
					token[tokpos] = 0;
				}
			}
			else {
				text.append(*from);
			}
		}
	}
	return 0;
}

SWORD_NAMESPACE_END