/
SyntaxStyle.java
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/
SyntaxStyle.java
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/*
* 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.
*/
package processing.app.syntax;
import java.awt.*;
import javax.swing.JComponent;
import java.awt.font.TextAttribute;
import java.util.Hashtable;
import java.util.Map;
/**
* 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: SyntaxStyle.java 1238 2011-09-13 06:48:28Z h $
*/
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, boolean underlined)
{
this.color = color;
this.italic = italic;
this.bold = bold;
this.underlined = underlined;
}
/**
* 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 || underlined);
}
/**
* 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 true if boldface is enabled for this style.
*/
public boolean isUnderlined()
{
return underlined;
}
/**
* 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());
if (underlined) {
Map<TextAttribute, Object> attr = new Hashtable<TextAttribute, Object>();
attr.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
lastStyledFont = lastStyledFont.deriveFont(attr);
}
return lastStyledFont;
}
/**
* Returns the font metrics for the styled font.
*/
public FontMetrics getFontMetrics(Font font, JComponent comp)
{
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());
if (underlined) {
Map<TextAttribute, Object> attr = new Hashtable<TextAttribute, Object>();
attr.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
lastStyledFont = lastStyledFont.deriveFont(attr);
}
//fontMetrics = Toolkit.getDefaultToolkit().getFontMetrics(lastStyledFont);
fontMetrics = comp.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" : "") +
(underlined ? ",underlined" : "") + "]";
}
// private members
private Color color;
private boolean italic;
private boolean bold;
private boolean underlined;
private Font lastFont;
private Font lastStyledFont;
private FontMetrics fontMetrics;
}