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package javax.accessibility;


import java.util.*;
import java.awt.*;
import javax.swing.text.*;



The AccessibleText interface should be implemented by all classes that present textual information on the display. This interface provides the standard mechanism for an assistive technology to access that text via its content, attributes, and spatial location. Applications can determine if an object supports the AccessibleText interface by first obtaining its AccessibleContext (see Accessible) and then calling the AccessibleContext.getAccessibleText method of AccessibleContext. If the return value is not null, the object supports this interface. 
Author:     Peter Korn
See Also:
/**
 * <P>The AccessibleText interface should be implemented by all
 * classes that present textual information on the display.  This interface
 * provides the standard mechanism for an assistive technology to access
 * that text via its content, attributes, and spatial location.
 * Applications can determine if an object supports the AccessibleText
 * interface by first obtaining its AccessibleContext (see {@link Accessible})
 * and then calling the {@link AccessibleContext#getAccessibleText} method of
 * AccessibleContext.  If the return value is not null, the object supports this
 * interface.
 *
 * @see Accessible
 * @see Accessible#getAccessibleContext
 * @see AccessibleContext
 * @see AccessibleContext#getAccessibleText
 *
 * @author      Peter Korn
 */
public interface AccessibleText {

    
Constant used to indicate that the part of the text that should be
retrieved is a character.

See Also:
/**
     * Constant used to indicate that the part of the text that should be
     * retrieved is a character.
     *
     * @see #getAtIndex
     * @see #getAfterIndex
     * @see #getBeforeIndex
     */
    public static final int CHARACTER = 1;

    
Constant used to indicate that the part of the text that should be
retrieved is a word.

See Also:
/**
     * Constant used to indicate that the part of the text that should be
     * retrieved is a word.
     *
     * @see #getAtIndex
     * @see #getAfterIndex
     * @see #getBeforeIndex
     */
    public static final int WORD = 2;

    
Constant used to indicate that the part of the text that should be
retrieved is a sentence.
A sentence is a string of words which expresses an assertion,
a question, a command, a wish, an exclamation, or the performance
of an action. In English locales, the string usually begins with
a capital letter and concludes with appropriate end punctuation;
such as a period, question or exclamation mark. Other locales may
use different capitalization and/or punctuation.

See Also:
/**
     * Constant used to indicate that the part of the text that should be
     * retrieved is a sentence.
     *
     * A sentence is a string of words which expresses an assertion,
     * a question, a command, a wish, an exclamation, or the performance
     * of an action. In English locales, the string usually begins with
     * a capital letter and concludes with appropriate end punctuation;
     * such as a period, question or exclamation mark. Other locales may
     * use different capitalization and/or punctuation.
     *
     * @see #getAtIndex
     * @see #getAfterIndex
     * @see #getBeforeIndex
     */
    public static final int SENTENCE = 3;

    
Given a point in local coordinates, return the zero-based index
of the character under that Point.  If the point is invalid,
this method returns -1.

Params:
  • p – the Point in local coordinates
Returns:the zero-based index of the character under Point p; if
Point is invalid return -1.
/**
     * Given a point in local coordinates, return the zero-based index
     * of the character under that Point.  If the point is invalid,
     * this method returns -1.
     *
     * @param p the Point in local coordinates
     * @return the zero-based index of the character under Point p; if
     * Point is invalid return -1.
     */
    public int getIndexAtPoint(Point p);

    
Determines the bounding box of the character at the given
index into the string.  The bounds are returned in local
coordinates.  If the index is invalid an empty rectangle is returned.

Params:
  • i – the index into the String
Returns:the screen coordinates of the character's bounding box,
if index is invalid return an empty rectangle.
/**
     * Determines the bounding box of the character at the given
     * index into the string.  The bounds are returned in local
     * coordinates.  If the index is invalid an empty rectangle is returned.
     *
     * @param i the index into the String
     * @return the screen coordinates of the character's bounding box,
     * if index is invalid return an empty rectangle.
     */
    public Rectangle getCharacterBounds(int i);

    
Returns the number of characters (valid indicies)

Returns:the number of characters
/**
     * Returns the number of characters (valid indicies)
     *
     * @return the number of characters
     */
    public int getCharCount();

    
Returns the zero-based offset of the caret.
Note: That to the right of the caret will have the same index
value as the offset (the caret is between two characters).

Returns:the zero-based offset of the caret.
/**
     * Returns the zero-based offset of the caret.
     *
     * Note: That to the right of the caret will have the same index
     * value as the offset (the caret is between two characters).
     * @return the zero-based offset of the caret.
     */
    public int getCaretPosition();

    
Returns the String at a given index.

Params:
  • part – the CHARACTER, WORD, or SENTENCE to retrieve
  • index – an index within the text
Returns:the letter, word, or sentence
/**
     * Returns the String at a given index.
     *
     * @param part the CHARACTER, WORD, or SENTENCE to retrieve
     * @param index an index within the text
     * @return the letter, word, or sentence
     */
    public String getAtIndex(int part, int index);

    
Returns the String after a given index.

Params:
  • part – the CHARACTER, WORD, or SENTENCE to retrieve
  • index – an index within the text
Returns:the letter, word, or sentence
/**
     * Returns the String after a given index.
     *
     * @param part the CHARACTER, WORD, or SENTENCE to retrieve
     * @param index an index within the text
     * @return the letter, word, or sentence
     */
    public String getAfterIndex(int part, int index);

    
Returns the String before a given index.

Params:
  • part – the CHARACTER, WORD, or SENTENCE to retrieve
  • index – an index within the text
Returns:the letter, word, or sentence
/**
     * Returns the String before a given index.
     *
     * @param part the CHARACTER, WORD, or SENTENCE to retrieve
     * @param index an index within the text
     * @return the letter, word, or sentence
     */
    public String getBeforeIndex(int part, int index);

    
Returns the AttributeSet for a given character at a given index

Params:
  • i – the zero-based index into the text
Returns:the AttributeSet of the character
/**
     * Returns the AttributeSet for a given character at a given index
     *
     * @param i the zero-based index into the text
     * @return the AttributeSet of the character
     */
    public AttributeSet getCharacterAttribute(int i);

    
Returns the start offset within the selected text.
If there is no selection, but there is
a caret, the start and end offsets will be the same.

Returns:the index into the text of the start of the selection
/**
     * Returns the start offset within the selected text.
     * If there is no selection, but there is
     * a caret, the start and end offsets will be the same.
     *
     * @return the index into the text of the start of the selection
     */
    public int getSelectionStart();

    
Returns the end offset within the selected text.
If there is no selection, but there is
a caret, the start and end offsets will be the same.

Returns:the index into the text of the end of the selection
/**
     * Returns the end offset within the selected text.
     * If there is no selection, but there is
     * a caret, the start and end offsets will be the same.
     *
     * @return the index into the text of the end of the selection
     */
    public int getSelectionEnd();

    
Returns the portion of the text that is selected.

Returns:the String portion of the text that is selected
/**
     * Returns the portion of the text that is selected.
     *
     * @return the String portion of the text that is selected
     */
    public String getSelectedText();
}