A Content class that supports Emacs-style Markers.
The standard GapContent is close, but unfortunately it only
supports inserting *before* marks, which is not the Emacs default.
This provides a superset of the Position functionality (except for undo).
createPosition
public javax.swing.text.Position createPosition(int offset)
throws BadLocationException
getChars
protected int getChars(int where,
int len)
throws BadLocationException
getChars
public void getChars(int where,
int len,
Segment txt)
throws BadLocationException
getString
public String getString(int where,
int len)
throws BadLocationException
indexOf
public static int indexOf(char[] buffer,
int start,
int limit,
char ch)
insertString
public UndoableEdit insertString(int where,
String str)
throws BadLocationException
insertString
public UndoableEdit insertString(int where,
String str,
boolean beforeMarkers)
throws BadLocationException
lastIndexOf
public static int lastIndexOf(char[] buffer,
int start,
int limit,
char ch)
Search for the last occurrence of a character
in buffer[limit..start].
remove
public UndoableEdit remove(int where,
int nitems)
throws BadLocationException
scan
public final long scan(char target,
int start,
int end,
int count,
boolean allowQuit)
Search in BUF for COUNT instances of the character TARGET between START and END.
If COUNT is positive, search forwards; END must be >= START.
If COUNT is negative, search backwards for the -COUNTth instance;
END must be <= START.
If COUNT is zero, do anything you please; run rogue, for all I care.
If we find COUNT instances, SHORTAGE is zero, and return the
position after the COUNTth match. Note that for reverse motion
this is not the same as the usual convention for Emacs motion commands.
If we don't find COUNT instances before reaching END, set SHORTAGE
to the number of TARGETs left unfound, and return (shortage<<32|END).