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previous/next word functionality, ctrl+left/right, shift+ctrl+left/right.

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micha3lp 2006-08-28 01:20:28 +00:00
parent 3cad3f1ec8
commit de3e9a1dd0
1 changed files with 142 additions and 0 deletions
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142
source/org/thdl/tib/text/TibetanRTFEditorKit.java
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@ -20,6 +20,13 @@ package org.thdl.tib.text;
import javax.swing.text.ViewFactory;
import javax.swing.text.rtf.RTFEditorKit;
import javax.swing.text.DefaultEditorKit ;
import javax.swing.Action ;
import javax.swing.text.TextAction ;
import javax.swing.text.JTextComponent ;
import javax.swing.text.BadLocationException ;
import java.awt.event.ActionEvent ;
import org.thdl.tib.text.TibetanMachineWeb ;
/** An EditorKit that is cognizant of the line-wrapping rules for
* Tibetan text. That is, this class knows about the tsheg and other
@ -42,4 +49,139 @@ public class TibetanRTFEditorKit extends RTFEditorKit {
}
return f;
}
class TmwNextWordAction extends TextAction
{
boolean selecting = false ;
public TmwNextWordAction ( String actionName, boolean select )
{
super ( actionName ) ;
selecting = select ;
}
public void actionPerformed ( ActionEvent e )
{
JTextComponent target = getTextComponent ( e ) ;
int offset = target.getCaretPosition () ;
offset = findNextBreakable ( target, offset ) ;
if ( -1 != offset )
{
if ( !selecting )
target.setCaretPosition ( offset + 1 ) ;
else
target.moveCaretPosition ( offset + 1 ) ;
}
}
}
class TmwPrevWordAction extends TextAction
{
boolean selecting = false ;
public TmwPrevWordAction ( String actionName, boolean select )
{
super ( actionName ) ;
selecting = select ;
}
public void actionPerformed ( ActionEvent e )
{
JTextComponent target = getTextComponent ( e ) ;
int offset = target.getCaretPosition () ;
offset = findPrevBreakable ( target, offset ) ;
if ( -1 != offset )
{
if ( !selecting )
target.setCaretPosition ( offset ) ;
else
target.moveCaretPosition ( offset ) ;
}
}
}
public Action [] getActions ()
{
Action [] actions = super.getActions () ;
for ( int i = 0; i < actions.length; i++ )
{
String actionName = (String)actions [i].getValue ( Action.NAME ) ;
boolean select = false ;
if ( actionName.equals ( DefaultEditorKit.nextWordAction ) ||
( select = actionName.equals ( DefaultEditorKit.selectionNextWordAction ) ) )
{
actions [i] = new TmwNextWordAction ( actionName, select ) ;
}
else if ( actionName.equals ( DefaultEditorKit.previousWordAction ) ||
( select = actionName.equals ( DefaultEditorKit.selectionPreviousWordAction ) ) )
{
actions [i] = new TmwPrevWordAction ( actionName, select ) ;
}
}
return actions ;
}
private static int findNextBreakable ( JTextComponent target, int offset )
{
int lastOffset = target.getDocument ().getLength () - 1 ;
try
{
char curChar ;
do
{
curChar = target.getText ( offset++, 1 ).charAt ( 0 ) ;
}
while ( TibetanMachineWeb.isTMWFontCharBreakable ( curChar ) && offset <= lastOffset ) ;
while ( offset <= lastOffset )
{
curChar = target.getText ( offset, 1 ).charAt ( 0 ) ;
if ( TibetanMachineWeb.isTMWFontCharBreakable ( curChar ) )
return offset ;
offset++ ;
}
}
catch ( BadLocationException e )
{
lastOffset = -1 ;
}
return lastOffset ;
}
private static int findPrevBreakable ( JTextComponent target, int offset )
{
int lastOffset = target.getDocument ().getLength () ;
try
{
char curChar ;
do
{
curChar = target.getText ( offset--, 1 ).charAt ( 0 ) ;
}
while ( TibetanMachineWeb.isTMWFontCharBreakable ( curChar ) && offset >= 0 ) ;
while ( offset >= 0 )
{
curChar = target.getText ( offset, 1 ).charAt ( 0 ) ;
if ( TibetanMachineWeb.isTMWFontCharBreakable ( curChar ) )
return offset ;
offset-- ;
}
}
catch ( BadLocationException e )
{
lastOffset = -1 ;
}
return lastOffset ;
}
}