/**
 * @file dialogstack.cpp
 * @brief Keeps track of number of stacked dialogs
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2013, Zi Ree @ Second Life
 *
 * 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "dialogstack.h"

#include "llviewercontrol.h"

void DialogStack::update()
{
	// show dialog stack browse icon when more than one dialog is on the screen
	gSavedSettings.setBOOL("DialogStackIconVisible", mNotificationIDs.size() > 1);
}

void DialogStack::push(const LLUUID& uuid)
{
	mNotificationIDs.push_back(uuid);
	update();
}

void DialogStack::pop(const LLUUID& uuid)
{
	if (mNotificationIDs.empty())
	{
		LL_WARNS() << "Dialog Stack count was 0 when pop() was called." << LL_ENDL;
	}
	else
	{
		mNotificationIDs.remove(uuid);
		update();
	}
}

const LLUUID& DialogStack::flip(const LLUUID& uuid)
{
	std::list<LLUUID>::iterator found = std::find(mNotificationIDs.begin(), mNotificationIDs.end(), uuid);
	if (found != mNotificationIDs.end())
	{
		if (found == mNotificationIDs.begin())
		{
			return mNotificationIDs.back();
		}
		--found;
		return *found;
	}

	return LLUUID::null;
}
