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/*
 * Copyright (c) 2013 Tobias Markmann
 * Licensed under the Simplified BSD license.
 * See Documentation/Licenses/BSD-simplified.txt for more information.
 */

/*
 * Copyright (c) 2015-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <SwifTools/MacOSXChecker.h>

#include <algorithm>

#include <boost/algorithm/string.hpp>

#include <AppKit/AppKit.h>

namespace Swift {

MacOSXChecker::MacOSXChecker() {
	NSSpellChecker* spellChecker = [NSSpellChecker sharedSpellChecker];
	[spellChecker setAutomaticallyIdentifiesLanguages:YES];
}

MacOSXChecker::~MacOSXChecker() {
}

bool MacOSXChecker::isCorrect(const std::string& /*word*/) {
	// No content since it doesn't seem to be used anywhere.
	return false;
}

void MacOSXChecker::getSuggestions(const std::string& word, std::vector<std::string>& list) {
	NSSpellChecker* spellChecker = [NSSpellChecker sharedSpellChecker];
	NSString* wordString = [[NSString alloc] initWithUTF8String: word.c_str()];
	NSArray* suggestions = [spellChecker guessesForWordRange:NSMakeRange(0, [wordString length]) inString:wordString language:nil inSpellDocumentWithTag:0];
	for(unsigned int i = 0; i < [suggestions count]; ++i) {
		list.push_back(std::string([[suggestions objectAtIndex:i] UTF8String]));
	}
	[wordString release];
}

void MacOSXChecker::checkFragment(const std::string& fragment, PositionPairList& misspelledPositions) {
	NSSpellChecker* spellChecker = [NSSpellChecker sharedSpellChecker];
	size_t nextLocation = 0;
	NSRange range;
	NSString *fragmentString = [[NSString alloc] initWithUTF8String: fragment.c_str()];
	do {
		range = [spellChecker checkSpellingOfString:fragmentString startingAt:static_cast<long>(nextLocation)];
		if (range.location != NSNotFound) {
			if (range.location < nextLocation)
				break;
			misspelledPositions.push_back(PositionPair(static_cast<int>(range.location), static_cast<int>(range.location + range.length)));
			nextLocation = range.location + range.length + 1;
		}
	} while (range.location != NSNotFound);
	[fragmentString release];
}

}