Utilities (Java Platform SE 7 )

java.lang.Object
- javax.swing.text.Utilities

```
public class Utilities
extends Object
```
A collection of methods to deal with various text related activities.

Constructor Summary

Constructors
Constructor and Description

Utilities()

Constructors
Constructor and Description
`Utilities()`

Method Summary

Methods
Modifier and Type	Method and Description
`static int`	`drawTabbedText(Segment s, int x, int y, Graphics g, TabExpander e, int startOffset)` Draws the given text, expanding any tabs that are contained using the given tab expansion technique.
`static int`	`getBreakLocation(Segment s, FontMetrics metrics, int x0, int x, TabExpander e, int startOffset)` Determine where to break the given text to fit within the given span.
`static int`	`getNextWord(JTextComponent c, int offs)` Determines the start of the next word for the given location.
`static Element`	`getParagraphElement(JTextComponent c, int offs)` Determines the element to use for a paragraph/line.
`static int`	`getPositionAbove(JTextComponent c, int offs, int x)` Determines the position in the model that is closest to the given view location in the row above.
`static int`	`getPositionBelow(JTextComponent c, int offs, int x)` Determines the position in the model that is closest to the given view location in the row below.
`static int`	`getPreviousWord(JTextComponent c, int offs)` Determine the start of the prev word for the given location.
`static int`	`getRowEnd(JTextComponent c, int offs)` Determines the ending row model position of the row that contains the specified model position.
`static int`	`getRowStart(JTextComponent c, int offs)` Determines the starting row model position of the row that contains the specified model position.
`static int`	`getTabbedTextOffset(Segment s, FontMetrics metrics, int x0, int x, TabExpander e, int startOffset)` Determines the relative offset into the given text that best represents the given span in the view coordinate system.
`static int`	`getTabbedTextOffset(Segment s, FontMetrics metrics, int x0, int x, TabExpander e, int startOffset, boolean round)`
`static int`	`getTabbedTextWidth(Segment s, FontMetrics metrics, int x, TabExpander e, int startOffset)` Determines the width of the given segment of text taking tabs into consideration.
`static int`	`getWordEnd(JTextComponent c, int offs)` Determines the end of a word for the given location.
`static int`	`getWordStart(JTextComponent c, int offs)` Determines the start of a word for the given model location.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Utilities
```
public Utilities()
```
- Method Detail
  - drawTabbedText
```
public static final int drawTabbedText(Segment s,
                 int x,
                 int y,
                 Graphics g,
                 TabExpander e,
                 int startOffset)
```
    Draws the given text, expanding any tabs that are contained using the given tab expansion technique. This particular implementation renders in a 1.1 style coordinate system where ints are used and 72dpi is assumed.
    
    Parameters:
    s - the source of the text
    x - the X origin >= 0
    y - the Y origin >= 0
    g - the graphics context
    e - how to expand the tabs. If this value is null, tabs will be expanded as a space character.
    startOffset - starting offset of the text in the document >= 0
    
    Returns:
    the X location at the end of the rendered text
  - getTabbedTextWidth
```
public static final int getTabbedTextWidth(Segment s,
                     FontMetrics metrics,
                     int x,
                     TabExpander e,
                     int startOffset)
```
    Determines the width of the given segment of text taking tabs into consideration. This is implemented in a 1.1 style coordinate system where ints are used and 72dpi is assumed.
    
    Parameters:
    s - the source of the text
    metrics - the font metrics to use for the calculation
    x - the X origin >= 0
    e - how to expand the tabs. If this value is null, tabs will be expanded as a space character.
    startOffset - starting offset of the text in the document >= 0
    
    Returns:
    the width of the text
  - getTabbedTextOffset
```
public static final int getTabbedTextOffset(Segment s,
                      FontMetrics metrics,
                      int x0,
                      int x,
                      TabExpander e,
                      int startOffset)
```
    Determines the relative offset into the given text that best represents the given span in the view coordinate system. This is implemented in a 1.1 style coordinate system where ints are used and 72dpi is assumed.
    
    Parameters:
    s - the source of the text
    metrics - the font metrics to use for the calculation
    x0 - the starting view location representing the start of the given text >= 0.
    x - the target view location to translate to an offset into the text >= 0.
    e - how to expand the tabs. If this value is null, tabs will be expanded as a space character.
    startOffset - starting offset of the text in the document >= 0
    
    Returns:
    the offset into the text >= 0
  - getTabbedTextOffset
```
public static final int getTabbedTextOffset(Segment s,
                      FontMetrics metrics,
                      int x0,
                      int x,
                      TabExpander e,
                      int startOffset,
                      boolean round)
```
  - getBreakLocation
```
public static final int getBreakLocation(Segment s,
                   FontMetrics metrics,
                   int x0,
                   int x,
                   TabExpander e,
                   int startOffset)
```
    Determine where to break the given text to fit within the given span. This tries to find a word boundary.
    
    Parameters:
    s - the source of the text
    metrics - the font metrics to use for the calculation
    x0 - the starting view location representing the start of the given text.
    x - the target view location to translate to an offset into the text.
    e - how to expand the tabs. If this value is null, tabs will be expanded as a space character.
    startOffset - starting offset in the document of the text
    
    Returns:
    the offset into the given text
  - getRowStart
```
public static final int getRowStart(JTextComponent c,
              int offs)
                             throws BadLocationException
```
    Determines the starting row model position of the row that contains the specified model position. The component given must have a size to compute the result. If the component doesn't have a size a value of -1 will be returned.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the position >= 0 if the request can be computed, otherwise a value of -1 will be returned.
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getRowEnd
```
public static final int getRowEnd(JTextComponent c,
            int offs)
                           throws BadLocationException
```
    Determines the ending row model position of the row that contains the specified model position. The component given must have a size to compute the result. If the component doesn't have a size a value of -1 will be returned.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the position >= 0 if the request can be computed, otherwise a value of -1 will be returned.
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getPositionAbove
```
public static final int getPositionAbove(JTextComponent c,
                   int offs,
                   int x)
                                  throws BadLocationException
```
    Determines the position in the model that is closest to the given view location in the row above. The component given must have a size to compute the result. If the component doesn't have a size a value of -1 will be returned.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    x - the X coordinate >= 0
    
    Returns:
    the position >= 0 if the request can be computed, otherwise a value of -1 will be returned.
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getPositionBelow
```
public static final int getPositionBelow(JTextComponent c,
                   int offs,
                   int x)
                                  throws BadLocationException
```
    Determines the position in the model that is closest to the given view location in the row below. The component given must have a size to compute the result. If the component doesn't have a size a value of -1 will be returned.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    x - the X coordinate >= 0
    
    Returns:
    the position >= 0 if the request can be computed, otherwise a value of -1 will be returned.
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getWordStart
```
public static final int getWordStart(JTextComponent c,
               int offs)
                              throws BadLocationException
```
    Determines the start of a word for the given model location. Uses BreakIterator.getWordInstance() to actually get the words.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the location in the model of the word start >= 0
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getWordEnd
```
public static final int getWordEnd(JTextComponent c,
             int offs)
                            throws BadLocationException
```
    Determines the end of a word for the given location. Uses BreakIterator.getWordInstance() to actually get the words.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the location in the model of the word end >= 0
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getNextWord
```
public static final int getNextWord(JTextComponent c,
              int offs)
                             throws BadLocationException
```
    Determines the start of the next word for the given location. Uses BreakIterator.getWordInstance() to actually get the words.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the location in the model of the word start >= 0
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getPreviousWord
```
public static final int getPreviousWord(JTextComponent c,
                  int offs)
                                 throws BadLocationException
```
    Determine the start of the prev word for the given location. Uses BreakIterator.getWordInstance() to actually get the words.
    
    Parameters:
    c - the editor
    offs - the offset in the document >= 0
    
    Returns:
    the location in the model of the word start >= 0
    
    Throws:
    
    BadLocationException - if the offset is out of range
  - getParagraphElement
```
public static final Element getParagraphElement(JTextComponent c,
                          int offs)
```
    Determines the element to use for a paragraph/line.
    
    Parameters:
    c - the editor
    offs - the starting offset in the document >= 0
    
    Returns:
    the element

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Class Utilities

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Utilities

Method Detail

drawTabbedText

getTabbedTextWidth

getTabbedTextOffset

getTabbedTextOffset

getBreakLocation

getRowStart

getRowEnd

getPositionAbove

getPositionBelow

getWordStart

getWordEnd

getNextWord

getPreviousWord

getParagraphElement