/** 
 * @file lltextutil.cpp
 * @brief Misc text-related auxiliary methods
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "lltextutil.h"

#include "lluicolor.h"
#include "lltextbox.h"
#include "llurlmatch.h"

boost::function<bool(LLUrlMatch*,LLTextBase*)>	LLTextUtil::TextHelpers::iconCallbackCreationFunction = 0;

void LLTextUtil::textboxSetHighlightedVal(LLTextBox *txtbox, const LLStyle::Params& normal_style, const std::string& text, const std::string& hl)
{
	static LLUIColor sFilterTextColor = LLUIColorTable::instance().getColor("FilterTextColor", LLColor4::green);

	std::string text_uc = text;
	LLStringUtil::toUpper(text_uc);

	size_t hl_begin = 0, hl_len = hl.size();

	if (hl_len == 0 || (hl_begin = text_uc.find(hl)) == std::string::npos)
	{
		txtbox->setText(text, normal_style);
		return;
	}

	LLStyle::Params hl_style = normal_style;
	hl_style.color = sFilterTextColor;

	txtbox->setText(LLStringUtil::null); // clear text
	txtbox->appendText(text.substr(0, hl_begin),		false, normal_style);
	txtbox->appendText(text.substr(hl_begin, hl_len),	false, hl_style);
	txtbox->appendText(text.substr(hl_begin + hl_len),	false, normal_style);
}

void LLTextUtil::textboxSetGreyedVal(LLTextBox *txtbox, const LLStyle::Params& normal_style, const std::string& text, const std::string& greyed)
{
    static LLUIColor sGreyedTextColor = LLUIColorTable::instance().getColor("Gray", LLColor4::grey);

    size_t greyed_begin = 0, greyed_len = greyed.size();

    if (greyed_len == 0 || (greyed_begin = text.find(greyed)) == std::string::npos)
    {
        txtbox->setText(text, normal_style);
        return;
    }

    LLStyle::Params greyed_style = normal_style;
    greyed_style.color = sGreyedTextColor;
    txtbox->setText(LLStringUtil::null); // clear text
    txtbox->appendText(text.substr(0, greyed_begin),        false, normal_style);
    txtbox->appendText(text.substr(greyed_begin, greyed_len),   false, greyed_style);
    txtbox->appendText(text.substr(greyed_begin + greyed_len),  false, normal_style);
}

bool LLTextUtil::processUrlMatch(LLUrlMatch* match,LLTextBase* text_base, bool is_content_trusted)
{
	if (match == 0 || text_base == 0)
		return false;

	if(match->getID() != LLUUID::null && TextHelpers::iconCallbackCreationFunction)
	{
		bool segment_created = TextHelpers::iconCallbackCreationFunction(match,text_base);
		if(segment_created)
			return true;
	}

	// output an optional icon before the Url
	if (is_content_trusted && !match->getIcon().empty() )
	{
		LLUIImagePtr image = LLUI::getUIImage(match->getIcon());
		if (image)
		{
			LLStyle::Params icon;
			icon.image = image;
			// Text will be replaced during rendering with the icon,
			// but string cannot be empty or the segment won't be
			// added (or drawn).
			text_base->appendImageSegment(icon);

			return true;
		}
	}
	
	return false;
}

// EOF
