UIEmoLabel.java

/* Copyright (c) 2008 Bluendo S.r.L.
 * See about.html for details about license.
 *
 * $Id: UIEmoLabel.java 1419 2009-05-04 13:45:19Z luca $
*/

/**
 * 
 */
package it.yup.ui;

import java.util.Hashtable;

import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

/**
 * @author luca
 * 
 */
public class UIEmoLabel extends UILabel {

        private static Hashtable emos;
        private static String[] codes;

        /**
         * @param text
         */
        public UIEmoLabel(String text) {
                super(text);
        }

        static {
                initialize();
        }

        private static void initialize() {
                emos = new Hashtable();
                // the number of emoticons
                int emoNumber = 16;
                codes = new String[] { /*
                 * these are the possible emos the next lines
                 * are only other codes for these
                 */
                ":-S", "B-)", ":D", ":O", "O:)", ">:)", "|-)", ";-)", ":-/", ":-@", ":-&", ":'(", ":(", ":)", ":*", ":P",
                /* additional codes for the same emos (starting at emonuber index) */
                ";)",":d",":o", "o:)", ":p" };
                for (int i = 0; i < emoNumber; i++) {
                        emos.put(codes[i], UICanvas.getUIImage("/emo/" + i + ".png"));
                }
                // additional code (in case of multiple coding for the same emo)
                emos.put(codes[emoNumber], UICanvas.getUIImage("/emo/7.png"));emoNumber++;
                emos.put(codes[emoNumber], UICanvas.getUIImage("/emo/2.png"));emoNumber++;
                emos.put(codes[emoNumber], UICanvas.getUIImage("/emo/3.png"));emoNumber++;
                emos.put(codes[emoNumber], UICanvas.getUIImage("/emo/4.png"));emoNumber++;
                emos.put(codes[emoNumber], UICanvas.getUIImage("/emo/15.png"));
        }

        void paintTextLine(Graphics g, String textLine, int horizontalSpace,
                        int verticalSpace) {
                Object[] emoTuple = this.findEmoTuple(textLine);
                if (emoTuple == null) {
                        g.drawString(textLine, horizontalSpace, verticalSpace,
                                                        Graphics.LEFT | Graphics.TOP);
                } else {
                        int index = ((Integer) emoTuple[0]).intValue();
                        String code = (String) emoTuple[1];
                        Image img = (Image) UIEmoLabel.emos.get(code);
                        String firstHalf = textLine.substring(0, index);
                        String secondHalf = textLine.substring(index + code.length());
                        g.drawString(firstHalf, horizontalSpace, verticalSpace,
                                                        Graphics.LEFT | Graphics.TOP);
                        int additionalSpace = 0;
                        if (g.getFont().getHeight() > img.getHeight()) {
                                additionalSpace = (g.getFont().getHeight() - img.getHeight()) / 2;
                        }
                        g.drawImage(img, horizontalSpace
                                        + g.getFont().stringWidth(firstHalf), verticalSpace
                                        + additionalSpace, Graphics.LEFT | Graphics.TOP);
                        int originalX = g.getTranslateX();
                        g.translate(horizontalSpace + g.getFont().stringWidth(firstHalf)
                                        + img.getWidth() + 1, 0);
                        paintTextLine(g, secondHalf, 0, verticalSpace);
                        g.translate(originalX - g.getTranslateX(), 0);
                }
        }

        private Object[] findEmoTuple(String textLine) {
                int index = textLine.length() + 1;
                String code = null;
                for (int i = 0; i < UIEmoLabel.codes.length; i++) {
                        int tempIndex = textLine.indexOf(UIEmoLabel.codes[i]);
                        if (tempIndex >= 0 && tempIndex < index) {
                                index = tempIndex;
                                code = UIEmoLabel.codes[i];
                        }
                }
                if (code != null) {
                        Object[] retVal = new Object[2];
                        retVal[0] = new Integer(index);
                        retVal[1] = code;
                        return retVal;
                }

                return null;
        }

        int getTextWidth(String textLine, Font font) {
                Object[] emoTuple = this.findEmoTuple(textLine);
                if (emoTuple == null) {
                        return font.stringWidth(textLine);
                } else {
                        int index = ((Integer) emoTuple[0]).intValue();
                        String code = (String) emoTuple[1];
                        Image img = (Image) UIEmoLabel.emos.get(code);
                        String firstHalf = textLine.substring(0, index);
                        String secondHalf = textLine.substring(index + code.length());
                        return font.stringWidth(firstHalf) + img.getWidth() + 1
                                        + getTextWidth(secondHalf, font);
                }
        }

}