org.freehep.graphics2d
Class GenericTagHandler

java.lang.Object
  org.freehep.graphics2d.TagHandler
      org.freehep.graphics2d.GenericTagHandler

public class GenericTagHandler
extends TagHandler

The class converts HTML tags like in instances of TextAttribute.

Version:

$Id: GenericTagHandler.java 12753 2007-06-12 22:32:31Z duns $

Author:

Mark Donszelmann, Steffen Greiffenberg

Field Summary

static java.lang.Integer

UNDERLINE_OVERLINE TextAttribute for overline, not a standard

Constructor Summary

GenericTagHandler(java.awt.Graphics2D graphics)
creates a tag handler for printing text and calculating its size

Method Summary

protected java.lang.String	closeTag(java.lang.String tag) closes the given html tag.
java.awt.font.TextLayout	createTextLayout(TagString s, double superscriptCorrection) calculates the string bounds using the current font of graphics.
protected java.lang.String	openTag(java.lang.String tag) handles bold , italic , superscript , subscript , vertical , overline , underline , strikethrough , underline dashed , underline dotted and typewriter
void	print(TagString s, double x, double y, double superscriptCorrection) prints the tagged string at x:y
protected java.lang.String	text(java.lang.String text) calculates miny und maxy for createTextLayout(TagString, double).

Methods inherited from class org.freehep.graphics2d.TagHandler

defaultEntity, entity, main, parse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNDERLINE_OVERLINE

public static java.lang.Integer UNDERLINE_OVERLINE

TextAttribute for overline, not a standard

Constructor Detail

GenericTagHandler

public GenericTagHandler(java.awt.Graphics2D graphics)

creates a tag handler for printing text and calculating its size

Parameters:

graphics - stores the font for calculations

Method Detail

print

public void print(TagString s,
                  double x,
                  double y,
                  double superscriptCorrection)

prints the tagged string at x:y

Parameters:

s - string to print using the stored graphics

x - coordinate for drawing

y - coordinate for drawing

superscriptCorrection - correction for to high / to low text

createTextLayout

public java.awt.font.TextLayout createTextLayout(TagString s,
                                                 double superscriptCorrection)

calculates the string bounds using the current font of graphics.

Parameters:

s - string to calculate

Returns:

bouding box after parsing s

openTag

protected java.lang.String openTag(java.lang.String tag)

handles bold , italic , superscript , subscript , vertical , overline , underline , strikethrough , underline dashed , underline dotted and typewriter

Overrides:

openTag in class TagHandler

Parameters:

tag - one of the known tags, otherwise the overloaded methode is called

Returns:

empty string or the result of the overloaded method

closeTag

protected java.lang.String closeTag(java.lang.String tag)

closes the given html tag. It doesn't matter, if that one was opened, so closes a too, because the use the same TextAttribute.UNDERLINE.

Overrides:

closeTag in class TagHandler

Parameters:

tag - to close

Returns:

empty string or the result of the overloaded method

text

protected java.lang.String text(java.lang.String text)

calculates miny und maxy for createTextLayout(TagString, double). If print(org.freehep.graphics2d.TagString, double, double, double) is set, text is drawed using Graphics2D.drawString(String, float, float) of graphics

Overrides:

text in class TagHandler

Parameters:

text - text to draw

Returns:

unmodified text parameter