public final class StringContent extends Object implements AbstractDocument.Content, Serializable
An implementation of the AbstractDocument.Content interface that is a brute force implementation that is useful for relatively small documents and/or debugging. It manages the character content as a simple character array. It is also quite inefficient.
It is generally recommended that the gap buffer or piece table implementations be used instead. This buffer does not scale up to large sizes.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.
public StringContent()
Creates a new StringContent object. Initial size defaults to 10.
public StringContent(int initialLength)
Creates a new StringContent object, with the initial size specified. If the length is < 1, a size of 1 is used.
initialLength - the initial sizepublic int length()
Returns the length of the content.
length in interface AbstractDocument.Content
AbstractDocument.Content.length()public UndoableEdit insertString(int where,
String str)
throws BadLocationException Inserts a string into the content.
insertString in interface AbstractDocument.Content
where - the starting position >= 0 && < length()str - the non-null string to insertBadLocationException - if the specified position is invalidAbstractDocument.Content.insertString(int, java.lang.String)public UndoableEdit remove(int where,
int nitems)
throws BadLocationException Removes part of the content. where + nitems must be < length().
remove in interface AbstractDocument.Content
where - the starting position >= 0nitems - the number of characters to remove >= 0BadLocationException - if the specified position is invalidAbstractDocument.Content.remove(int, int)public String getString(int where,
int len)
throws BadLocationException Retrieves a portion of the content. where + len must be <= length().
getString in interface AbstractDocument.Content
where - the starting position >= 0len - the length to retrieve >= 0BadLocationException - if the specified position is invalidAbstractDocument.Content.getString(int, int)public void getChars(int where,
int len,
Segment chars)
throws BadLocationException Retrieves a portion of the content. where + len must be <= length()
getChars in interface AbstractDocument.Content
where - the starting position >= 0len - the number of characters to retrieve >= 0chars - the Segment object to return the characters inBadLocationException - if the specified position is invalidAbstractDocument.Content.getChars(int, int, javax.swing.text.Segment)public Position createPosition(int offset)
throws BadLocationException Creates a position within the content that will track change as the content is mutated.
createPosition in interface AbstractDocument.Content
offset - the offset to create a position for >= 0BadLocationException - if the specified position is invalidprotected Vector getPositionsInRange(Vector v,
int offset,
int length) Returns a Vector containing instances of UndoPosRef for the Positions in the range offset to offset + length. If v is not null the matching Positions are placed in there. The vector with the resulting Positions are returned.
This is meant for internal usage, and is generally not of interest to subclasses.
v - the Vector to use, with a new one created on nulloffset - the starting offset >= 0length - the length >= 0protected void updateUndoPositions(Vector positions)
Resets the location for all the UndoPosRef instances in positions.
This is meant for internal usage, and is generally not of interest to subclasses.
positions - the positions of the instances
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