/*
 * @(#)Highlighting.java	1.14 98/06/29
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package demos.Fonts;


import java.awt.*;
import java.awt.event.*;
import java.awt.font.TextLayout;
import java.awt.font.TextHitInfo;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.geom.AffineTransform;
import J2DCanvas;


/**
 * Highlighting of text showing the caret, the highlight & the character
 * advances.
 */
public class Highlighting extends J2DCanvas {

    private int[] curPos;
    private TextLayout[] layouts;
    private Rectangle2D[]  rects;
    private Color colors[] = { Color.cyan, Color.lightGray };
    private Font[] fonts;
    private Font smallF = new Font("Courier", Font.PLAIN, 8);
    private FontRenderContext frc;


    public Highlighting() {
	setBackground(Color.white);

        fonts = new Font[2];
	layouts = new TextLayout[fonts.length];
	rects = new Rectangle2D[fonts.length];
	curPos = new int[fonts.length];
	sleepAmount = 900;
	runnable = true;
    }


    public void drawTextField(Graphics2D g2, TextLayout tl, Rectangle2D r, Color c, int i) {
	float rx = (float) r.getX();
	float ry = (float) r.getY();
	float rw = (float) r.getWidth();
	float rh = (float) r.getHeight();

	AffineTransform at = new AffineTransform();
        at.setToTranslation(rx, ry);

	// draw highlighted shape
	Shape hilite = tl.getLogicalHighlightShape(0, curPos[i]);
	hilite = at.createTransformedShape(hilite);
	float hx = (float) hilite.getBounds().getX();
	float hy = (float) hilite.getBounds().getY();
	float hh = (float) hilite.getBounds().getHeight();
	g2.setColor(c);
	g2.fill(hilite);

	// get caret shape
        Shape[] shapes = tl.getCaretShapes(curPos[i]);
      	Shape caret = at.createTransformedShape(shapes[0]);

	g2.setColor(Color.black);
	tl.draw(g2, rx, ry);
	g2.draw(caret);
        g2.draw(new Rectangle2D.Float(hx,hy,rw,hh));

	// Display character advances.
	for (TextHitInfo hit = TextHitInfo.trailing(-1); hit != null; hit = tl.getNextRightHit(hit)) {
            float[] cInfo = tl.getCaretInfo(hit);
	    String str = String.valueOf((int) cInfo[0]);
	    TextLayout t = new TextLayout(str,smallF,frc);
	    t.draw(g2, (float) rx+cInfo[0], hy+hh+t.getAscent()+1.0f);
	}
    }


    public void drawDemo(Graphics2D g2) {

	if (newBufferedImage) {
	    String text[] = { "HILIGHTING", "Java2D" };
            fonts[0] = new Font("Courier",Font.PLAIN,w/text[0].length()+8);
            fonts[1] = new Font("serif", Font.BOLD+Font.ITALIC,w/text[1].length());
            frc = g2.getFontRenderContext();
	    for (int i = 0; i < layouts.length; i++ ) {
                layouts[i]  = new TextLayout(text[i], fonts[i], frc);
	        float rx = (float) (w/2-layouts[i].getBounds().getWidth()/2);
	        float ry = (float) ((i == 0) ? h/3 : h * 0.75f);
	        float rw = (float) (layouts[i].getBounds().getWidth());
	        float rh = (float) (layouts[i].getBounds().getHeight());
	        rects[i] = new Rectangle2D.Float(rx, ry, rw, rh);
	        curPos[i] = 0;
	    }
	}

	for (int i = 0; i < 2; i++) {
	    if (layouts[i] == null || rects[i] == null)
		continue;
	    drawTextField(g2, layouts[i], rects[i], colors[i], i);
	    if (curPos[i]++ == layouts[i].getCharacterCount())
	        curPos[i] = 0;
	}
    }


    public static void main(String argv[]) {
	final Highlighting demo = new Highlighting();
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	    public void windowDeiconified(WindowEvent e) { demo.start(); }
	    public void windowIconified(WindowEvent e) { demo.stop(); }
	};
	Frame f = new Frame("Java2D Demo - Highlighting");
	f.addWindowListener(l);
	f.add("Center", demo);
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
	demo.start();
    }
}