font.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

	 *         </CODE>
	 */
	public float getCalculatedSize() {
		float s = this.size;
		if (s == UNDEFINED) {
			s = DEFAULTSIZE;
		}
		return s;
	}

	/**
	 * Gets the leading that can be used with this font.
	 * 
	 * @param linespacing
	 *            a certain linespacing
	 * @return the height of a line
	 */
	public float getCalculatedLeading(float linespacing) {
		return linespacing * getCalculatedSize();
	}

	/**
	 * Sets the size.
	 * 
	 * @param size
	 *            The new size of the font.
	 */
	public void setSize(float size) {
		this.size = size;
	}

	// STYLE
	
	/**
	 * Gets the style of this font.
	 * 
	 * @return a size
	 */
	public int getStyle() {
		return style;
	}

	/**
	 * Gets the style that can be used with the calculated <CODE>BaseFont
	 * </CODE>.
	 * 
	 * @return the style that can be used with the calculated <CODE>BaseFont
	 *         </CODE>
	 */
	public int getCalculatedStyle() {
		int style = this.style;
		if (style == UNDEFINED) {
			style = NORMAL;
		}
		if (baseFont != null)
			return style;
		if (family == SYMBOL || family == ZAPFDINGBATS)
			return style;
		else
			return style & (~BOLDITALIC);
	}

	/**
	 * checks if this font is Bold.
	 * 
	 * @return a <CODE>boolean</CODE>
	 */
	public boolean isBold() {
		if (style == UNDEFINED) {
			return false;
		}
		return (style & BOLD) == BOLD;
	}

	/**
	 * checks if this font is Bold.
	 * 
	 * @return a <CODE>boolean</CODE>
	 */
	public boolean isItalic() {
		if (style == UNDEFINED) {
			return false;
		}
		return (style & ITALIC) == ITALIC;
	}

	/**
	 * checks if this font is underlined.
	 * 
	 * @return a <CODE>boolean</CODE>
	 */
	public boolean isUnderlined() {
		if (style == UNDEFINED) {
			return false;
		}
		return (style & UNDERLINE) == UNDERLINE;
	}

	/**
	 * checks if the style of this font is STRIKETHRU.
	 * 
	 * @return a <CODE>boolean</CODE>
	 */
	public boolean isStrikethru() {
		if (style == UNDEFINED) {
			return false;
		}
		return (style & STRIKETHRU) == STRIKETHRU;
	}

	/**
	 * Sets the style.
	 * 
	 * @param style
	 *            the style.
	 */
	public void setStyle(int style) {
		if (this.style == UNDEFINED)
			this.style = NORMAL;
		this.style |= style;
	}

	/**
	 * Sets the style using a <CODE>String</CODE> containing one of more of
	 * the following values: normal, bold, italic, underline, strike.
	 * 
	 * @param style
	 *            A <CODE>String</CODE> representing a certain style.
	 */
	public void setStyle(String style) {
		if (this.style == UNDEFINED)
			this.style = NORMAL;
		this.style |= getStyleValue(style);
	}

	/**
	 * Translates a <CODE>String</CODE> -value of a certain style into the
	 * index value is used for this style in this class.
	 * 
	 * @param style
	 *            A <CODE>String</CODE>
	 * @return the corresponding value
	 */
	public static int getStyleValue(String style) {
		int s = 0;
		if (style.indexOf(Markup.CSS_VALUE_NORMAL) != -1) {
			s |= NORMAL;
		}
		if (style.indexOf(Markup.CSS_VALUE_BOLD) != -1) {
			s |= BOLD;
		}
		if (style.indexOf(Markup.CSS_VALUE_ITALIC) != -1) {
			s |= ITALIC;
		}
		if (style.indexOf(Markup.CSS_VALUE_OBLIQUE) != -1) {
			s |= ITALIC;
		}
		if (style.indexOf(Markup.CSS_VALUE_UNDERLINE) != -1) {
			s |= UNDERLINE;
		}
		if (style.indexOf(Markup.CSS_VALUE_LINETHROUGH) != -1) {
			s |= STRIKETHRU;
		}
		return s;
	}

	// COLOR
	
	/**
	 * Gets the color of this font.
	 * 
	 * @return a color
	 */
	public Color getColor() {
		return color;
	}

	/**
	 * Sets the color.
	 * 
	 * @param color
	 *            the new color of the font
	 */

	public void setColor(Color color) {
		this.color = color;
	}

	/**
	 * Sets the color.
	 * 
	 * @param red
	 *            the red-value of the new color
	 * @param green
	 *            the green-value of the new color
	 * @param blue
	 *            the blue-value of the new color
	 */
	public void setColor(int red, int green, int blue) {
		this.color = new Color(red, green, blue);
	}

	// BASEFONT

	/**
	 * Gets the <CODE>BaseFont</CODE> inside this object.
	 * 
	 * @return the <CODE>BaseFont</CODE>
	 */
	public BaseFont getBaseFont() {
		return baseFont;
	}

	/**
	 * Gets the <CODE>BaseFont</CODE> this class represents. For the built-in
	 * fonts a <CODE>BaseFont</CODE> is calculated.
	 * 
	 * @param specialEncoding
	 *            <CODE>true</CODE> to use the special encoding for Symbol and
	 *            ZapfDingbats, <CODE>false</CODE> to always use <CODE>Cp1252
	 *            </CODE>
	 * @return the <CODE>BaseFont</CODE> this class represents
	 */
	public BaseFont getCalculatedBaseFont(boolean specialEncoding) {
		if (baseFont != null)
			return baseFont;
		int style = this.style;
		if (style == UNDEFINED) {
			style = NORMAL;
		}
		String fontName = BaseFont.HELVETICA;
		String encoding = BaseFont.WINANSI;
		BaseFont cfont = null;
		switch (family) {
		case COURIER:
			switch (style & BOLDITALIC) {
			case BOLD:
				fontName = BaseFont.COURIER_BOLD;
				break;
			case ITALIC:
				fontName = BaseFont.COURIER_OBLIQUE;
				break;
			case BOLDITALIC:
				fontName = BaseFont.COURIER_BOLDOBLIQUE;
				break;
			default:
				//case NORMAL:
				fontName = BaseFont.COURIER;
				break;
			}
			break;
		case TIMES_ROMAN:
			switch (style & BOLDITALIC) {
			case BOLD:
				fontName = BaseFont.TIMES_BOLD;
				break;
			case ITALIC:
				fontName = BaseFont.TIMES_ITALIC;
				break;
			case BOLDITALIC:
				fontName = BaseFont.TIMES_BOLDITALIC;
				break;
			default:
			case NORMAL:
				fontName = BaseFont.TIMES_ROMAN;
				break;
			}
			break;
		case SYMBOL:
			fontName = BaseFont.SYMBOL;
			if (specialEncoding)
				encoding = BaseFont.SYMBOL;
			break;
		case ZAPFDINGBATS:
			fontName = BaseFont.ZAPFDINGBATS;
			if (specialEncoding)
				encoding = BaseFont.ZAPFDINGBATS;
			break;
		default:
		case Font.HELVETICA:
			switch (style & BOLDITALIC) {
			case BOLD:
				fontName = BaseFont.HELVETICA_BOLD;
				break;
			case ITALIC:
				fontName = BaseFont.HELVETICA_OBLIQUE;
				break;
			case BOLDITALIC:
				fontName = BaseFont.HELVETICA_BOLDOBLIQUE;
				break;
			default:
			case NORMAL:
				fontName = BaseFont.HELVETICA;
				break;
			}
			break;
		}
		try {
			cfont = BaseFont.createFont(fontName, encoding, false);
		} catch (Exception ee) {
			throw new ExceptionConverter(ee);
		}
		return cfont;
	}
	
	
	// Helper methods

	/**
	 * Checks if the properties of this font are undefined or null.
	 * <P>
	 * If so, the standard should be used.
	 * 
	 * @return a <CODE>boolean</CODE>
	 */
	public boolean isStandardFont() {
		return (family == UNDEFINED && size == UNDEFINED && style == UNDEFINED
				&& color == null && baseFont == null);
	}

	/**
	 * Replaces the attributes that are equal to <VAR>null</VAR> with the
	 * attributes of a given font.
	 * 
	 * @param font
	 *            the font of a bigger element class
	 * @return a <CODE>Font</CODE>
	 */
	public Font difference(Font font) {
		// size
		float dSize = font.size;
		if (dSize == UNDEFINED) {
			dSize = this.size;
		}
		// style
		int dStyle = UNDEFINED;
		int style1 = this.style;
		int style2 = font.getStyle();
		if (style1 != UNDEFINED || style2 != UNDEFINED) {
			if (style1 == UNDEFINED)
				style1 = 0;
			if (style2 == UNDEFINED)
				style2 = 0;
			dStyle = style1 | style2;
		}
		// color
		Color dColor = font.color;
		if (dColor == null) {
			dColor = this.color;
		}
		// family
		if (font.baseFont != null) {
			return new Font(font.baseFont, dSize, dStyle, dColor);
		}
		if (font.getFamily() != UNDEFINED) {
			return new Font(font.family, dSize, dStyle, dColor);
		}
		if (this.baseFont != null) {
			if (dStyle == style1) {
				return new Font(this.baseFont, dSize, dStyle, dColor);
			} else {
				return FontFactory.getFont(this.getFamilyname(), dSize, dStyle,
						dColor);
			}
		}
		return new Font(this.family, dSize, dStyle, dColor);
	}

	// methods to retrieve the membervariables

	/**
	 * Gets the family of this font.
	 * 
	 * @return the value of the family
	 * @deprecated Use {@link #getFamily()} instead
	 */
	public int family() {
		return getFamily();
	}

	/**
	 * Gets the size of this font.
	 * 
	 * @return a size
	 * @deprecated Use {@link #getSize()} instead
	 */
	public float size() {
		return getSize();
	}
	
	/**
	 * Gets the leading that can be used with this font.
	 * 
	 * @param linespacing
	 *            a certain linespacing
	 * @return the height of a line
	 * @deprecated Use {@link #getCalculatedLeading(float)} instead
	 */
	public float leading(float linespacing) {
		return getCalculatedLeading(linespacing);
	}

	/**
	 * Gets the style of this font.
	 * 
	 * @return a size
	 * @deprecated Use {@link #getStyle()} instead
	 */
	public int style() {
		return getStyle();
	}

	/**
	 * Gets the color of this font.
	 * 
	 * @return a color
	 * @deprecated Use {@link #getColor()} instead
	 */
	public Color color() {
		return getColor();
	}
}