Returns the Document the mutation is occuring on.

  Returns the Document the mutation is occuring on.
Returns: Document that remove/insertString will operate on

  Inserts the specified text, bypassing the DocumentFilter.

  Inserts the specified text, bypassing the
DocumentFilter.
Parameters:
- offset - the offset into the document to insert the content >= 0. All positions that track change at or after the given location will move.
- string - the string to insert
- attr - the attributes to associate with the inserted content. This may be null if there are no attributes.
Throws:
- BadLocationException - the given insert position is not a valid position within the document

  Removes the specified region of text, bypassing the DocumentFilter.

  Removes the specified region of text, bypassing the
DocumentFilter.
Parameters:
- offset - the offset from the beginning >= 0
- length - the number of characters to remove >= 0
Throws:
- BadLocationException - some portion of the removal range was not a valid part of the document. The location in the exception is the first bad position encountered.

  Deletes the region of text from offset to offset + length, and replaces it with text.

  Deletes the region of text from offset to
offset + length, and replaces it with
text.
Parameters:
- offset - Location in Document
- length - Length of text to delete
- string - Text to insert, null indicates no text to insert
- attrs - AttributeSet indicating attributes of inserted text, null is legal.
Throws:
- BadLocationException - the given insert is not a valid position within the document