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javax.swing.text

Interface AbstractDocument.Content

Contents
  • All Known Implementing Classes:
    GapContent, StringContent
    Enclosing class:
    AbstractDocument

    public static interface AbstractDocument.Content
    Interface to describe a sequence of character content that can be edited. Implementations may or may not support a history mechanism which will be reflected by whether or not mutations return an UndoableEdit implementation.
    See Also:
    AbstractDocument

    • Method Detail

      • createPosition

        Position createPosition(int offset)
                        throws BadLocationException
        Creates a position within the content that will track change as the content is mutated.
        Parameters:
        offset - the offset in the content >= 0
        Returns:
        a Position
        Throws:
        BadLocationException - for an invalid offset

      • length

        int length()
        Current length of the sequence of character content.
        Returns:
        the length >= 0

      • insertString

        UndoableEdit insertString(int where,
                        String str)
                          throws BadLocationException
        Inserts a string of characters into the sequence.
        Parameters:
        where - offset into the sequence to make the insertion >= 0
        str - string to insert
        Returns:
        if the implementation supports a history mechanism, a reference to an Edit implementation will be returned, otherwise returns null
        Throws:
        BadLocationException - thrown if the area covered by the arguments is not contained in the character sequence

      • remove

        UndoableEdit remove(int where,
                  int nitems)
                    throws BadLocationException
        Removes some portion of the sequence.
        Parameters:
        where - The offset into the sequence to make the insertion >= 0.
        nitems - The number of items in the sequence to remove >= 0.
        Returns:
        If the implementation supports a history mechansim, a reference to an Edit implementation will be returned, otherwise null.
        Throws:
        BadLocationException - Thrown if the area covered by the arguments is not contained in the character sequence.

      • getString

        String getString(int where,
               int len)
                 throws BadLocationException
        Fetches a string of characters contained in the sequence.
        Parameters:
        where - Offset into the sequence to fetch >= 0.
        len - number of characters to copy >= 0.
        Returns:
        the string
        Throws:
        BadLocationException - Thrown if the area covered by the arguments is not contained in the character sequence.

      • getChars

        void getChars(int where,
            int len,
            Segment txt)
              throws BadLocationException
        Gets a sequence of characters and copies them into a Segment.
        Parameters:
        where - the starting offset >= 0
        len - the number of characters >= 0
        txt - the target location to copy into
        Throws:
        BadLocationException - Thrown if the area covered by the arguments is not contained in the character sequence.
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