Application: gvSIG desktop

package com.iver.utiles.console.jedit;

/*

 * SyntaxStyle.java - A simple text style class

 * Copyright (C) 1999 Slava Pestov

 *

 * You may use and modify this package for any purpose. Redistribution is

 * permitted, in both source and binary form, provided that this notice

 * remains intact in all source distributions of this package.

 */

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics;

import java.awt.Toolkit;

/**

 * A simple text style class. It can specify the color, italic flag,

 * and bold flag of a run of text.

 * @author Slava Pestov

 * @version $Id$

 */

public class SyntaxStyle

{

        /**

         * Creates a new SyntaxStyle.

         * @param color The text color

         * @param italic True if the text should be italics

         * @param bold True if the text should be bold

         */

        public SyntaxStyle(Color color, boolean italic, boolean bold)

        {

                this.color = color;

                this.italic = italic;

                this.bold = bold;

        }

        /**

         * Returns the color specified in this style.

         */

        public Color getColor()

        {

                return color;

        }

        /**

         * Returns true if no font styles are enabled.

         */

        public boolean isPlain()

        {

                return !(bold || italic);

        }

        /**

         * Returns true if italics is enabled for this style.

         */

        public boolean isItalic()

        {

                return italic;

        }

        /**

         * Returns true if boldface is enabled for this style.

         */

        public boolean isBold()

        {

                return bold;

        }

        /**

         * Returns the specified font, but with the style's bold and

         * italic flags applied.

         */

        public Font getStyledFont(Font font)

        {

                if(font == null)

                        throw new NullPointerException("font param must not"

                                + " be null");

                if(font.equals(lastFont))

                        return lastStyledFont;

                lastFont = font;

                lastStyledFont = new Font(font.getFamily(),

                        (bold ? Font.BOLD : 0)

                        | (italic ? Font.ITALIC : 0),

                        font.getSize());

                return lastStyledFont;

        }

        /**

         * Returns the font metrics for the styled font.

         */

        public FontMetrics getFontMetrics(Font font)

        {

                if(font == null)

                        throw new NullPointerException("font param must not"

                                + " be null");

                if(font.equals(lastFont) && fontMetrics != null)

                        return fontMetrics;

                lastFont = font;

                lastStyledFont = new Font(font.getFamily(),

                        (bold ? Font.BOLD : 0)

                        | (italic ? Font.ITALIC : 0),

                        font.getSize());

                fontMetrics = Toolkit.getDefaultToolkit().getFontMetrics(

                        lastStyledFont);

                return fontMetrics;

        }

        /**

         * Sets the foreground color and font of the specified graphics

         * context to that specified in this style.

         * @param gfx The graphics context

         * @param font The font to add the styles to

         */

        public void setGraphicsFlags(Graphics gfx, Font font)

        {

                Font _font = getStyledFont(font);

                gfx.setFont(_font);

                gfx.setColor(color);

        }

        /**

         * Returns a string representation of this object.

         */

        public String toString()

        {

                return getClass().getName() + "[color=" + color +

                        (italic ? ",italic" : "") +

                        (bold ? ",bold" : "") + "]";

        }

        // private members

        private Color color;

        private boolean italic;

        private boolean bold;

        private Font lastFont;

        private Font lastStyledFont;

        private FontMetrics fontMetrics;

}