/*
 Copyright (C) 2009 Ricardo Pescuma Domenecci

 This is free software; you can redistribute it and/or
 modify it under the terms of the GNU Library General Public
 License as published by the Free Software Foundation; either
 version 2 of the License, or (at your option) any later version.

 This 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
 Library General Public License for more details.

 You should have received a copy of the GNU Library General Public
 License along with this file; see the file license.txt.  If
 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.
 */

#include "..\..\core\commonheaders.h"

#include "extraicons.h"

struct Icon
{
	string name;
	int refCount;
	HANDLE hImage;

	Icon(const char *icolibName) :
		name(icolibName), refCount(0), hImage(INVALID_HANDLE_VALUE)
	{
	}
};

static vector<Icon> usedIcons;

static Icon * FindIcon(const char *icolibName)
{
	Icon *icon = NULL;

	for (unsigned int i = 0; i < usedIcons.size(); i++)
	{
		Icon *tmp = &usedIcons[i];
		if (tmp->name != icolibName)
			continue;

		icon = tmp;
		break;
	}

	if (icon == NULL)
	{
		usedIcons.push_back(Icon(icolibName));
		icon = &usedIcons[usedIcons.size() - 1];
	}

	if (icon->hImage == INVALID_HANDLE_VALUE)
	{
		HICON hIcon = Skin_GetIcon(icon->name.c_str());
		if (hIcon != NULL)
		{
			icon->hImage = ExtraIcon_Add(hIcon);
			Skin_ReleaseIcon(hIcon);
		}
	}

	return icon;
}

HANDLE GetIcon(const char *icolibName)
{
	return FindIcon(icolibName)->hImage;
}

HANDLE AddIcon(const char *icolibName)
{
	Icon *icon = FindIcon(icolibName);
	icon->refCount++;
	return icon->hImage;
}

void RemoveIcon(const char *icolibName)
{
	for (unsigned int i = 0; i < usedIcons.size(); i++)
	{
		Icon *icon = &usedIcons[i];

		if (icon->name != icolibName)
			continue;

		icon->refCount--;
		break;
	}
}

static bool NotUsedIcon(const Icon &icon)
{
	return icon.refCount <= 0;
}

void ResetIcons()
{
	usedIcons.erase(std::remove_if(usedIcons.begin(), usedIcons.end(), NotUsedIcon), usedIcons.end());

	for (unsigned int i = 0; i < usedIcons.size(); i++)
		usedIcons[i].hImage = INVALID_HANDLE_VALUE;
}