/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 **********************************************************************/

#include "highlighter.h"

namespace LC
{
namespace Azoth
{
namespace Rosenthal
{
	Highlighter::Highlighter (const ISpellChecker_ptr& checker, QTextDocument *parent)
	: QSyntaxHighlighter { parent }
	, Checker_ { checker }
	, SpellcheckCache_ { 50 * 1024 }
	{
		SpellCheckFormat_.setUnderlineColor ({ Qt::red });
		SpellCheckFormat_.setUnderlineStyle (QTextCharFormat::SpellCheckUnderline);
	}

	void Highlighter::highlightBlock (const QString& text)
	{
		QRegExp sr ("\\W+");
		const auto& splitted = text.split (sr, Qt::SkipEmptyParts);
		int prevStopPos = 0;
		for (const auto& str : splitted)
		{
			if (str.size () <= 1)
				continue;

			const auto val = SpellcheckCache_ [str];

			const auto isCorrect = val ?
					val->IsCorrect_ :
					Checker_->IsCorrect (str);

			if (!val)
				SpellcheckCache_.insert (str, new SCResult { isCorrect }, str.size ());

			if (isCorrect)
				continue;

			const int pos = text.indexOf (str, prevStopPos);
			if (pos >= 0)
			{
				setFormat (pos, str.length (), SpellCheckFormat_);
				prevStopPos = pos + str.length ();
			}
		}
	}
}
}
}
