JEditTextArea

processing.app.syntax

## Class JEditTextArea

- Object
- - Component
  - - Container
    - - JComponent
      - - JEditTextArea

- All Implemented Interfaces:
    ImageObserver, MenuContainer, Serializable

      public class JEditTextArea
      extends JComponent

  The text area component from the JEdit Syntax (syntax.jedit.org) project. This is a very early version of what later was completely rewritten and become jEdit (jedit.org). Over the years we've also added minor features for use with Processing (notably mouse wheel support and copyAsHTML). [fry]

  jEdit's text area component. It is more suited for editing program source code than JEditorPane, because it drops the unnecessary features (images, variable-width lines, and so on) and adds a whole bunch of useful goodies such as:

  - More flexible key binding scheme
  - Supports macro recorders
  - Rectangular selection
  - Bracket highlighting
  - Syntax highlighting
  - Command repetition
  - Block caret can be enabled
  It is also faster and doesn't have as many problems. It can be used in other applications; the only other part of jEdit it depends on is the syntax package.

  To use it in your app, treat it like any other component, for example:

      JEditTextArea ta = new JEditTextArea();
       ta.setTokenMarker(new JavaTokenMarker());
       ta.setText("public class Test {\n"
           + "    public static void main(String[] args) {\n"
           + "        System.out.println(\"Hello World\");\n"
           + "    }\n"
           + "}");

  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class JComponent

      `JComponent.AccessibleJComponent`

    - ### Nested classes/interfaces inherited from class Component

      `Component.BaselineResizeBehavior`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `EditorLineStatus` | `editorLineStatus` The component that tracks the current line number.
    `PdeKeyListener` | `editorListener` Forwards key events directly to the input handler.
    `static String` | `LEFT_OF_SCROLLBAR` Adding components with this name to the text area will place them left of the horizontal scroll bar.
    `static int` | `leftHandGutter` The size of the offset between the leftmost padding and the code

    - ### Fields inherited from class JComponent

      `TOOL_TIP_TEXT_KEY, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW`

    - ### Fields inherited from class Component

      `BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

    - ### Fields inherited from interface ImageObserver

      `ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JEditTextArea(TextAreaDefaults defaults)` Creates a new JEditTextArea with the specified settings.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `_offsetToX(int line, int offset)` Converts an offset in a line into an x coordinate.
    `void` | `addCaretListener(CaretListener listener)` Adds a caret change listener to this text area.
    `void` | `blinkCaret()` Blinks the caret.
    `void` | `copy()` Places the selected text into the clipboard.
    `void` | `copyAsHTML()` Copy the current selection as HTML, formerly "Format for Discourse".
    `void` | `cut()` Deletes the selected text from the text area and places it into the clipboard.
    `int` | `getBracketLine()` Returns the line of the highlighted bracket (the bracket matching the one before the caret)
    `int` | `getBracketPosition()` Returns the position of the highlighted bracket (the bracket matching the one before the caret)
    `int` | `getCaretLine()` Returns the caret line.
    `int` | `getCaretPosition()` Returns the caret position.
    `SyntaxDocument` | `getDocument()` Returns the document this text area is editing.
    `int` | `getDocumentLength()` Returns the length of the document.
    `int` | `getElectricScroll()` Returns the number of lines from the top and button of the text area that are always visible.
    `int` | `getFirstLine()` Returns the line displayed at the text area's origin.
    `int` | `getHorizontalOffset()` Returns the horizontal offset of drawn lines.
    `InputHandler` | `getInputHandler()` Returns the input handler.
    `InputMethodRequests` | `getInputMethodRequests()` Inline Input Method Support for Japanese.
    `int` | `getLastLine()` Convenience for checking what's on-screen.
    `int` | `getLineCount()` Returns the number of lines in the document.
    `int` | `getLineLength(int line)` Returns the length of the specified line.
    `int` | `getLineOfOffset(int offset)` Returns the line containing the specified offset.
    `int` | `getLineSelectionStopOffset(int line)` Returns the start offset of the line after this line, or the end of this line if there is no next line.
    `int` | `getLineStartNonWhiteSpaceOffset(int line)`
    `int` | `getLineStartOffset(int line)` Returns the start offset of the specified line.
    `int` | `getLineStopNonWhiteSpaceOffset(int line)`
    `int` | `getLineStopOffset(int line)` Returns the end offset of the specified line.
    `String` | `getLineText(int lineIndex)` Returns the text on the specified line.
    `void` | `getLineText(int lineIndex, Segment segment)` Copies the text on the specified line into a segment.
    `int` | `getMagicCaretPosition()` Returns the 'magic' caret position.
    `int` | `getMarkLine()` Returns the mark line.
    `int` | `getMarkPosition()` Returns the mark position.
    `TextAreaPainter` | `getPainter()` Returns the object responsible for painting this text area.
    `Printable` | `getPrintable()`
    `JPopupMenu` | `getRightClickPopup()` Returns the right click popup menu.
    `int` | `getScrollPosition()` Get current position of the vertical scroll bar.
    `String` | `getSelectedText()` Returns the selected text, or null if no selection is active.
    `int` | `getSelectionStart()` Returns the selection start offset.
    `int` | `getSelectionStart(int line)` Returns the offset where the selection starts on the specified line.
    `int` | `getSelectionStartLine()` Returns the selection start line.
    `int` | `getSelectionStop()` Returns the selection end offset.
    `int` | `getSelectionStop(int line)` Returns the offset where the selection ends on the specified line.
    `int` | `getSelectionStopLine()` Returns the selection end line.
    `String` | `getText()` Returns the entire text of this text area.
    `String` | `getText(int start, int len)` Returns the specified substring of the document.
    `void` | `getText(int start, int len, Segment segment)` Copies the specified substring of the document into a segment.
    `TokenMarker` | `getTokenMarker()` Returns the document's token marker.
    `int` | `getVisibleLines()` Returns the number of lines visible in this text area.
    `boolean` | `isCaretBlinkEnabled()` Returns true if the caret is blinking, false otherwise.
    `boolean` | `isCaretVisible()` Returns true if the caret is visible, false otherwise.
    `boolean` | `isEditable()` Returns true if this text area is editable, false otherwise.
    `boolean` | `isOverwriteEnabled()` Returns true if overwrite mode is enabled, false otherwise.
    `boolean` | `isSelectionActive()`
    `boolean` | `isSelectionRectangular()` Returns true if the selection is rectangular, false otherwise.
    `int` | `lineToY(int line)` Converts a line index to a y co-ordinate.
    `int` | `offsetToX(int line, int offset)` Converts an offset in a line into an x co-ordinate.
    `void` | `overwriteSetSelectedText(String str)` Similar to `setSelectedText()`, but overstrikes the appropriate number of characters if overwrite mode is enabled.
    `void` | `paste()` Inserts the clipboard contents into the text.
    `void` | `processKeyEvent(KeyEvent evt)`
    `void` | `recalculateVisibleLines()` Recalculates the number of visible lines.
    `void` | `removeCaretListener(CaretListener listener)` Removes a caret change listener from this text area.
    `void` | `removeNotify()` Called by the AWT when this component is removed from it's parent.
    `boolean` | `scrollTo(int line, int offset)` Ensures that the specified line and offset is visible by scrolling the text area if necessary.
    `boolean` | `scrollToCaret()` Ensures that the caret is visible by scrolling the text area if necessary.
    `void` | `select(int start, int end)` Selects from the start offset to the end offset.
    `void` | `selectAll()` Selects all text in the document.
    `void` | `selectNone()` Moves the mark to the caret position.
    `void` | `setCaretBlinkEnabled(boolean caretBlinks)` Toggles caret blinking.
    `void` | `setCaretPosition(int caret)` Sets the caret position.
    `void` | `setCaretVisible(boolean caretVisible)` Sets if the caret should be visible.
    `void` | `setDocument(SyntaxDocument document)` Sets the document this text area is editing.
    `void` | `setDocument(SyntaxDocument document, int start, int stop, int scroll)` Set document with a twist, includes the old caret and scroll positions, added for p5.
    `void` | `setEditable(boolean editable)` Sets if this component is editable.
    `void` | `setElectricScroll(int electricScroll)` Sets the number of lines from the top and bottom of the text area that are always visible
    `void` | `setFirstLine(int firstLine)` Sets the line displayed at the text area's origin without updating the scroll bars.
    `void` | `setHorizontalOffset(int horizontalOffset)` Sets the horizontal offset of drawn lines.
    `void` | `setInputHandler(InputHandler inputHandler)` Sets the input handler.
    `void` | `setMagicCaretPosition(int magicCaret)` Sets the 'magic' caret position.
    `boolean` | `setOrigin(int firstLine, int horizontalOffset)` A fast way of changing both the first line and horizontal offset.
    `void` | `setOverwriteEnabled(boolean overwrite)` Sets if overwrite mode should be enabled.
    `void` | `setRightClickPopup(JPopupMenu popup)` Sets the right click popup menu.
    `void` | `setScrollPosition(int what)` Set position of the vertical scroll bar.
    `void` | `setSelectedText(String selectedText)` Replaces the selection with the specified text.
    `void` | `setSelectionEnd(int selectionEnd)` Sets the selection end.
    `void` | `setSelectionRectangular(boolean rectSelect)` Sets if the selection should be rectangular.
    `void` | `setSelectionStart(int selectionStart)` Sets the selection start.
    `void` | `setText(String text)` Sets the entire text of this text area.
    `void` | `setTokenMarker(TokenMarker tokenMarker)` Sets the document's token marker.
    `void` | `updateScrollBars()` Updates the state of the scroll bars.
    `int` | `xToOffset(int line, int x)` Converts an x co-ordinate to an offset within a line.
    `int` | `xyToOffset(int x, int y)` Converts a point to an offset, from the start of the text.
    `int` | `yToLine(int y)` Converts a y co-ordinate to a line index.

    - ### Methods inherited from class JComponent

      `addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintImmediately, paintImmediately, print, printAll, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update, updateUI`

    - ### Methods inherited from class Container

      `add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate`

    - ### Methods inherited from class Component

      `action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, contains, createImage, createImage, createVolatileImage, createVolatileImage, dispatchEvent, enable, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle`

    - ### Methods inherited from class Object

      `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### LEFT_OF_SCROLLBAR

          public static String LEFT_OF_SCROLLBAR

      Adding components with this name to the text area will place them left of the horizontal scroll bar. In jEdit, the status bar is added this way.

    - #### leftHandGutter

          public static final int leftHandGutter

      The size of the offset between the leftmost padding and the code
      See Also:
        Constant Field Values

    - #### editorListener

          public PdeKeyListener editorListener

      Forwards key events directly to the input handler. This is slightly faster than using a KeyListener because some Swing overhead is avoided.

    - #### editorLineStatus

          public EditorLineStatus editorLineStatus

      The component that tracks the current line number.

  - ### Constructor Detail

    - #### JEditTextArea

          public JEditTextArea(TextAreaDefaults defaults)

      Creates a new JEditTextArea with the specified settings.
      Parameters:
        `defaults` - The default settings

  - ### Method Detail

    - #### getInputMethodRequests

          public InputMethodRequests getInputMethodRequests()

      Inline Input Method Support for Japanese.
      Overrides:
        `getInputMethodRequests` in class `Component`

    - #### getScrollPosition

          public int getScrollPosition()

      Get current position of the vertical scroll bar. [fry]

    - #### setScrollPosition

          public void setScrollPosition(int what)

      Set position of the vertical scroll bar. [fry]

    - #### getPainter

          public final TextAreaPainter getPainter()

      Returns the object responsible for painting this text area.

    - #### getPrintable

          public final Printable getPrintable()

    - #### getInputHandler

          public final InputHandler getInputHandler()

      Returns the input handler.

    - #### setInputHandler

          public void setInputHandler(InputHandler inputHandler)

      Sets the input handler.
      Parameters:
        `inputHandler` - The new input handler

    - #### isCaretBlinkEnabled

          public final boolean isCaretBlinkEnabled()

      Returns true if the caret is blinking, false otherwise.

    - #### setCaretBlinkEnabled

          public void setCaretBlinkEnabled(boolean caretBlinks)

      Toggles caret blinking.
      Parameters:
        `caretBlinks` - True if the caret should blink, false otherwise

    - #### isCaretVisible

          public final boolean isCaretVisible()

      Returns true if the caret is visible, false otherwise.

    - #### setCaretVisible

          public void setCaretVisible(boolean caretVisible)

      Sets if the caret should be visible.
      Parameters:
        `caretVisible` - True if the caret should be visible, false otherwise

    - #### blinkCaret

          public final void blinkCaret()

      Blinks the caret.

    - #### getElectricScroll

          public final int getElectricScroll()

      Returns the number of lines from the top and button of the text area that are always visible.

    - #### setElectricScroll

          public final void setElectricScroll(int electricScroll)

      Sets the number of lines from the top and bottom of the text area that are always visible
      Parameters:
        `electricScroll` - The number of lines always visible from the top or bottom

    - #### updateScrollBars

          public void updateScrollBars()

      Updates the state of the scroll bars. This should be called if the number of lines in the document changes, or when the size of the text are changes.

    - #### getFirstLine

          public final int getFirstLine()

      Returns the line displayed at the text area's origin.

    - #### setFirstLine

          public void setFirstLine(int firstLine)

      Sets the line displayed at the text area's origin without updating the scroll bars.

    - #### getLastLine

          public final int getLastLine()

      Convenience for checking what's on-screen. [fry]

    - #### getVisibleLines

          public final int getVisibleLines()

      Returns the number of lines visible in this text area.

    - #### recalculateVisibleLines

          public final void recalculateVisibleLines()

      Recalculates the number of visible lines. This should not be called directly.

    - #### getHorizontalOffset

          public final int getHorizontalOffset()

      Returns the horizontal offset of drawn lines.

    - #### setHorizontalOffset

          public void setHorizontalOffset(int horizontalOffset)

      Sets the horizontal offset of drawn lines. This can be used to implement horizontal scrolling.
      Parameters:
        `horizontalOffset` - offset The new horizontal offset

    - #### setOrigin

          public boolean setOrigin(int firstLine,
                          int horizontalOffset)

      A fast way of changing both the first line and horizontal offset.
      Parameters:
        `firstLine` - The new first line
        `horizontalOffset` - The new horizontal offset
      Returns:
        True if any of the values were changed, false otherwise

    - #### scrollToCaret

          public boolean scrollToCaret()

      Ensures that the caret is visible by scrolling the text area if necessary.
      Returns:
        True if scrolling was actually performed, false if the caret was already visible

    - #### scrollTo

          public boolean scrollTo(int line,
                         int offset)

      Ensures that the specified line and offset is visible by scrolling the text area if necessary.
      Parameters:
        `line` - The line to scroll to
        `offset` - The offset in the line to scroll to
      Returns:
        True if scrolling was actually performed, false if the line and offset was already visible

    - #### lineToY

          public int lineToY(int line)

      Converts a line index to a y co-ordinate.
      Parameters:
        `line` - The line

    - #### yToLine

          public int yToLine(int y)

      Converts a y co-ordinate to a line index.
      Parameters:
        `y` - The y co-ordinate

    - #### offsetToX

          public final int offsetToX(int line,
                      int offset)

      Converts an offset in a line into an x co-ordinate. This is a slow version that can be used any time.
      Parameters:
        `line` - The line
        `offset` - The offset, from the start of the line

    - #### _offsetToX

          public int _offsetToX(int line,
                       int offset)

      Converts an offset in a line into an x coordinate. This is a fast version that should only be used if no changes were made to the text since the last repaint.
      Parameters:
        `line` - The line
        `offset` - The offset, from the start of the line

    - #### xToOffset

          public int xToOffset(int line,
                      int x)

      Converts an x co-ordinate to an offset within a line.
      Parameters:
        `line` - The line
        `x` - The x co-ordinate

    - #### xyToOffset

          public int xyToOffset(int x,
                       int y)

      Converts a point to an offset, from the start of the text.
      Parameters:
        `x` - The x co-ordinate of the point
        `y` - The y co-ordinate of the point

    - #### getDocument

          public final SyntaxDocument getDocument()

      Returns the document this text area is editing.

    - #### setDocument

          public void setDocument(SyntaxDocument document)

      Sets the document this text area is editing.
      Parameters:
        `document` - The document

    - #### setDocument

          public void setDocument(SyntaxDocument document,
                         int start,
                         int stop,
                         int scroll)

      Set document with a twist, includes the old caret and scroll positions, added for p5. [fry]

    - #### getTokenMarker

          public final TokenMarker getTokenMarker()

      Returns the document's token marker. Equivalent to calling `getDocument().getTokenMarker()`.

    - #### setTokenMarker

          public final void setTokenMarker(TokenMarker tokenMarker)

      Sets the document's token marker. Equivalent to caling `getDocument().setTokenMarker()`.
      Parameters:
        `tokenMarker` - The token marker

    - #### getDocumentLength

          public final int getDocumentLength()

      Returns the length of the document. Equivalent to calling `getDocument().getLength()`.

    - #### getLineCount

          public final int getLineCount()

      Returns the number of lines in the document.

    - #### getLineOfOffset

          public final int getLineOfOffset(int offset)

      Returns the line containing the specified offset.
      Parameters:
        `offset` - The offset

    - #### getLineStartOffset

          public int getLineStartOffset(int line)

      Returns the start offset of the specified line.
      Parameters:
        `line` - The line
      Returns:
        The start offset of the specified line, or -1 if the line is invalid

    - #### getLineStartNonWhiteSpaceOffset

          public int getLineStartNonWhiteSpaceOffset(int line)

    - #### getLineStopOffset

          public int getLineStopOffset(int line)

      Returns the end offset of the specified line.
      Parameters:
        `line` - The line
      Returns:
        The end offset of the specified line, or -1 if the line is invalid.

    - #### getLineStopNonWhiteSpaceOffset

          public int getLineStopNonWhiteSpaceOffset(int line)

    - #### getLineSelectionStopOffset

          public int getLineSelectionStopOffset(int line)

      Returns the start offset of the line after this line, or the end of this line if there is no next line.
      Parameters:
        `line` - The line
      Returns:
        The end offset of the specified line, or -1 if the line is invalid.

    - #### getLineLength

          public int getLineLength(int line)

      Returns the length of the specified line.
      Parameters:
        `line` - The line

    - #### getText

          public String getText()

      Returns the entire text of this text area.

    - #### setText

          public void setText(String text)

      Sets the entire text of this text area.

    - #### getText

          public final String getText(int start,
                       int len)

      Returns the specified substring of the document.
      Parameters:
        `start` - The start offset
        `len` - The length of the substring
      Returns:
        The substring, or null if the offsets are invalid

    - #### getText

          public final void getText(int start,
                     int len,
                     Segment segment)

      Copies the specified substring of the document into a segment. If the offsets are invalid, the segment will contain a null string.
      Parameters:
        `start` - The start offset
        `len` - The length of the substring
        `segment` - The segment

    - #### getLineText

          public final String getLineText(int lineIndex)

      Returns the text on the specified line.
      Parameters:
        `lineIndex` - The line
      Returns:
        The text, or null if the line is invalid

    - #### getLineText

          public final void getLineText(int lineIndex,
                         Segment segment)

      Copies the text on the specified line into a segment. If the line is invalid, the segment will contain a null string.
      Parameters:
        `lineIndex` - The line

    - #### getSelectionStart

          public final int getSelectionStart()

      Returns the selection start offset.

    - #### getSelectionStart

          public int getSelectionStart(int line)

      Returns the offset where the selection starts on the specified line.

    - #### getSelectionStartLine

          public final int getSelectionStartLine()

      Returns the selection start line.

    - #### setSelectionStart

          public final void setSelectionStart(int selectionStart)

      Sets the selection start. The new selection will be the new selection start and the old selection end.
      Parameters:
        `selectionStart` - The selection start
      See Also:
        `select(int,int)`

    - #### getSelectionStop

          public final int getSelectionStop()

      Returns the selection end offset.

    - #### getSelectionStop

          public int getSelectionStop(int line)

      Returns the offset where the selection ends on the specified line.

    - #### getSelectionStopLine

          public final int getSelectionStopLine()

      Returns the selection end line.

    - #### setSelectionEnd

          public final void setSelectionEnd(int selectionEnd)

      Sets the selection end. The new selection will be the old selection start and the bew selection end.
      Parameters:
        `selectionEnd` - The selection end
      See Also:
        `select(int,int)`

    - #### isSelectionActive

          public final boolean isSelectionActive()

    - #### getCaretPosition

          public final int getCaretPosition()

      Returns the caret position. This will either be the selection start or the selection end, depending on which direction the selection was made in.

    - #### getCaretLine

          public final int getCaretLine()

      Returns the caret line.

    - #### getMarkPosition

          public final int getMarkPosition()

      Returns the mark position. This will be the opposite selection bound to the caret position.
      See Also:
        `getCaretPosition()`

    - #### getMarkLine

          public final int getMarkLine()

      Returns the mark line.

    - #### setCaretPosition

          public final void setCaretPosition(int caret)

      Sets the caret position. The new selection will consist of the caret position only (hence no text will be selected)
      Parameters:
        `caret` - The caret position
      See Also:
        `select(int,int)`

    - #### selectAll

          public final void selectAll()

      Selects all text in the document.

    - #### selectNone

          public final void selectNone()

      Moves the mark to the caret position.

    - #### select

          public void select(int start,
                    int end)

      Selects from the start offset to the end offset. This is the general selection method used by all other selecting methods. The caret position will be start if start < end, and end if end > start.
      Parameters:
        `start` - The start offset
        `end` - The end offset

    - #### getSelectedText

          public final String getSelectedText()

      Returns the selected text, or null if no selection is active.

    - #### setSelectedText

          public void setSelectedText(String selectedText)

      Replaces the selection with the specified text.
      Parameters:
        `selectedText` - The replacement text for the selection

    - #### isEditable

          public final boolean isEditable()

      Returns true if this text area is editable, false otherwise.

    - #### setEditable

          public final void setEditable(boolean editable)

      Sets if this component is editable.
      Parameters:
        `editable` - True if this text area should be editable, false otherwise

    - #### getRightClickPopup

          public final JPopupMenu getRightClickPopup()

      Returns the right click popup menu.

    - #### setRightClickPopup

          public final void setRightClickPopup(JPopupMenu popup)

      Sets the right click popup menu.
      Parameters:
        `popup` - The popup

    - #### getMagicCaretPosition

          public final int getMagicCaretPosition()

      Returns the 'magic' caret position. This can be used to preserve the column position when moving up and down lines.

    - #### setMagicCaretPosition

          public final void setMagicCaretPosition(int magicCaret)

      Sets the 'magic' caret position. This can be used to preserve the column position when moving up and down lines.
      Parameters:
        `magicCaret` - The magic caret position

    - #### overwriteSetSelectedText

          public void overwriteSetSelectedText(String str)

      Similar to `setSelectedText()`, but overstrikes the appropriate number of characters if overwrite mode is enabled.
      Parameters:
        `str` - The string
      See Also:
        `setSelectedText(String)`, `isOverwriteEnabled()`

    - #### isOverwriteEnabled

          public final boolean isOverwriteEnabled()

      Returns true if overwrite mode is enabled, false otherwise.

    - #### setOverwriteEnabled

          public final void setOverwriteEnabled(boolean overwrite)

      Sets if overwrite mode should be enabled.
      Parameters:
        `overwrite` - True if overwrite mode should be enabled, false otherwise.

    - #### isSelectionRectangular

          public final boolean isSelectionRectangular()

      Returns true if the selection is rectangular, false otherwise.

    - #### setSelectionRectangular

          public final void setSelectionRectangular(boolean rectSelect)

      Sets if the selection should be rectangular.
      Parameters:
        `rectSelect` - True if the selection should be rectangular, false otherwise.

    - #### getBracketPosition

          public final int getBracketPosition()

      Returns the position of the highlighted bracket (the bracket matching the one before the caret)

    - #### getBracketLine

          public final int getBracketLine()

      Returns the line of the highlighted bracket (the bracket matching the one before the caret)

    - #### addCaretListener

          public final void addCaretListener(CaretListener listener)

      Adds a caret change listener to this text area.
      Parameters:
        `listener` - The listener

    - #### removeCaretListener

          public final void removeCaretListener(CaretListener listener)

      Removes a caret change listener from this text area.
      Parameters:
        `listener` - The listener

    - #### cut

          public void cut()

      Deletes the selected text from the text area and places it into the clipboard.

    - #### copy

          public void copy()

      Places the selected text into the clipboard.

    - #### copyAsHTML

          public void copyAsHTML()

      Copy the current selection as HTML, formerly "Format for Discourse".

      Original code by owd.

      Revised and updated for revision 0108 by Ben Fry (10 March 2006).

      Updated for 0122 to simply copy the code directly to the clipboard, rather than opening a new window.

      Updated for 0144 to only format the selected lines.

      Updated for 0185 to incorporate the HTML changes from the Arduino project, and set the formatter to always use HTML (disabling, but not removing the YaBB version of the code) and also fixing it for the Tools API.

      Updated for 0190 to simply be part of JEditTextArea, removed YaBB code. Simplest and most sensible to have it live here, since it's no longer specific to any language or version of the PDE.

    - #### paste

          public void paste()

      Inserts the clipboard contents into the text.

    - #### removeNotify

          public void removeNotify()

      Called by the AWT when this component is removed from it's parent. This stops clears the currently focused component.
      Overrides:
        `removeNotify` in class `JComponent`

    - #### processKeyEvent

          public void processKeyEvent(KeyEvent evt)

      Overrides:
        `processKeyEvent` in class `JComponent`