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/*
 *  MicroEmulator
 *  Copyright (C) 2001 Bartek Teodorczyk 
 *
 *  It is licensed under the following two licenses as alternatives:
 *    1. GNU Lesser General Public License (the "LGPL") version 2.1 or any newer version
 *    2. Apache License (the "AL") Version 2.0
 *
 *  You may not use this file except in compliance with at least one of
 *  the above two licenses.
 *
 *  You may obtain a copy of the LGPL at
 *      http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
 *
 *  You may obtain a copy of the AL at
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the LGPL or the AL for the specific language governing permissions and
 *  limitations.
 */

package org.microemu.device.swt;

import java.net.URL;
import java.util.Enumeration;
import java.util.Hashtable;

import javax.microedition.lcdui.Font;

import org.eclipse.swt.graphics.FontMetrics;
import org.microemu.app.ui.swt.SwtDeviceComponent;
import org.microemu.device.impl.FontManagerImpl;

public class SwtFontManager implements FontManagerImpl {

	static String FACE_SYSTEM_NAME = "SansSerif";

	static String FACE_MONOSPACE_NAME = "Monospaced";

	static String FACE_PROPORTIONAL_NAME = "SansSerif";

	static int SIZE_SMALL = 6;

	static int SIZE_MEDIUM = 8;

	static int SIZE_LARGE = 10;

	private Hashtable fonts = new Hashtable();

	private boolean antialiasing;

	org.microemu.device.impl.Font getFont(Font meFont) {
    	int key = 0;
    	key |= meFont.getFace();
    	key |= meFont.getStyle();
    	key |= meFont.getSize();
    	
    	org.microemu.device.impl.Font result = (org.microemu.device.impl.Font) fonts.get(new Integer(key));
	    
	    if (result == null) {
	    	String name = null;
	    	if (meFont.getFace() == Font.FACE_SYSTEM) {
	    		name = FACE_SYSTEM_NAME;
	    	} else if (meFont.getFace() == Font.FACE_MONOSPACE) {
	    		name = FACE_MONOSPACE_NAME;
	    	} else if (meFont.getFace() == Font.FACE_PROPORTIONAL) {
	    		name = FACE_PROPORTIONAL_NAME;
	    	}
	    	String style = ",";
	    	if ((meFont.getStyle() & Font.STYLE_PLAIN) != 0) {
	    		style += "plain,";
	    	}
	    	if ((meFont.getStyle() & Font.STYLE_BOLD) != 0) {
	    		style += "bold,";
	    	}
	    	if ((meFont.getStyle() & Font.STYLE_ITALIC) != 0) {
	    		style += "italic,";
	    	}
	    	if ((meFont.getStyle() & Font.STYLE_ITALIC) != 0) {
	    		style += "underlined,";
	    	}
	    	style = style.substring(0, style.length() - 1);
	    	int size = 0;
	    	if (meFont.getSize() == Font.SIZE_SMALL) {
	    		size = SIZE_SMALL;
	    	} else if (meFont.getSize() == Font.SIZE_MEDIUM) {
	    		size = SIZE_MEDIUM;
	    	} else if (meFont.getSize() == Font.SIZE_LARGE) {
	    		size = SIZE_LARGE;
	    	}
	    	result = new SwtSystemFont(name, style, size, antialiasing);
	    	fonts.put(new Integer(key), result);
	    }
	    
	    return result;
	}
	
	public void init() {
		fonts.clear();
	}

	public int charWidth(Font f, char ch) {
		return getFont(f).charWidth(ch);
	}

	public int charsWidth(Font f, char[] ch, int offset, int length) {
		return getFont(f).charsWidth(ch, offset, length);
	}

	public int getBaselinePosition(Font f) {
		return getFont(f).getBaselinePosition();
	}

	public int getHeight(Font f) {
		return getFont(f).getHeight();
	}

	public int stringWidth(Font f, String str) {
		return getFont(f).stringWidth(str);
	}

	public boolean getAntialiasing() {
		return antialiasing;
	}

	public void setAntialiasing(boolean antialiasing) 
	{
		this.antialiasing = antialiasing;
		
		Enumeration en = fonts.elements();
		while (en.hasMoreElements()) {
			SwtFont font = (SwtFont) en.nextElement();
			font.setAntialiasing(antialiasing);
		}
	}

	public void setFont(String face, String style, String size, org.microemu.device.impl.Font font) {
		int key = 0;
		
		if (face.equalsIgnoreCase("system")) {
			key |= Font.FACE_SYSTEM;
		} else if (face.equalsIgnoreCase("monospace")) {
			key |= Font.FACE_MONOSPACE;
		} else if (face.equalsIgnoreCase("proportional")) {
			key |= Font.FACE_PROPORTIONAL;
		}
		
		String testStyle = style.toLowerCase();
		if (testStyle.indexOf("plain") != -1) {
			key |= Font.STYLE_PLAIN;
		} 
		if (testStyle.indexOf("bold") != -1) {
			key |= Font.STYLE_BOLD;
		} 
		if (testStyle.indexOf("italic") != -1) {
			key |= Font.STYLE_ITALIC;
		} 
		if (testStyle.indexOf("underlined") != -1) {
			key |= Font.STYLE_UNDERLINED;
		}
		
		if (size.equalsIgnoreCase("small")) {
			key |= Font.SIZE_SMALL;
		} else if (size.equalsIgnoreCase("medium")) {
			key |= Font.SIZE_MEDIUM;
		} else if (size.equalsIgnoreCase("large")) {
			key |= Font.SIZE_LARGE;
		}
		
		fonts.put(new Integer(key), font);
	}

	public org.microemu.device.impl.Font createSystemFont(String defName, String defStyle, int defSize, boolean antialiasing) {
		return new SwtSystemFont(defName, defStyle, defSize, antialiasing);
	}

	public org.microemu.device.impl.Font createTrueTypeFont(URL defUrl, String defStyle, int defSize, boolean antialiasing) {
		return new SwtTrueTypeFont(defUrl, defStyle, defSize, antialiasing);
	}
	
}