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editor.ExtractVariablePopup Maven / Gradle / Ivy
package editor;
import editor.util.LabButton;
import editor.util.LabCheckbox;
import editor.util.TextComponentUtil;
import gw.lang.parser.IExpression;
import gw.lang.parser.IParseTree;
import gw.lang.parser.IParsedElement;
import gw.lang.parser.IStatement;
import gw.lang.parser.expressions.IProgram;
import gw.lang.parser.statements.IClassFileStatement;
import gw.lang.parser.statements.IFunctionStatement;
import gw.lang.parser.statements.INoOpStatement;
import gw.lang.parser.statements.IPropertyStatement;
import gw.util.GosuRefactorUtil;
import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
/**
* Provides the extract-variable refactor functionality for a Gosu editor
*
* @author cgross
*/
public class ExtractVariablePopup extends JDialog
{
private IdentifierTextField _varName;
private GosuEditor _gosuEditor;
private LabCheckbox _replaceAll;
private JButton _okBtn;
private static final String CLOSE = "_close";
private static final String OK = "_ok";
private JButton _cancelBtn;
public ExtractVariablePopup() throws HeadlessException
{
super( LabFrame.instance(), "Extract Variable", true );
setLayout( new BorderLayout() );
getRootPane().getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( KeyStroke.getKeyStroke( KeyEvent.VK_ESCAPE, 0 ), CLOSE );
getRootPane().getActionMap().put( CLOSE, new AbstractAction()
{
@Override
public void actionPerformed( ActionEvent e )
{
_cancelBtn.doClick();
}
} );
getRootPane().getInputMap( JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put( KeyStroke.getKeyStroke( KeyEvent.VK_ENTER, 0 ), OK );
getRootPane().getActionMap().put( OK, new AbstractAction()
{
@Override
public void actionPerformed( ActionEvent e )
{
_okBtn.doClick();
}
} );
JPanel mainPanel = new JPanel( new GridBagLayout() );
mainPanel.setBorder( BorderFactory.createEmptyBorder( 8, 8, 8, 8 ) );
GridBagConstraints c = new GridBagConstraints();
int iX = 0;
int iY = 0;
_varName = new IdentifierTextField();
c.anchor = GridBagConstraints.WEST;
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = iX++;
c.gridy = iY;
c.gridwidth = 1;
c.gridheight = 1;
c.weightx = 0;
c.weighty = 0;
c.insets = new Insets( 0, 0, 0, 4 );
JLabel nameLabel = new JLabel( "Name:" );
nameLabel.setDisplayedMnemonic( 'N' );
nameLabel.setLabelFor( _varName );
mainPanel.add( nameLabel, c );
_varName.getDocument().addDocumentListener( new DocumentListener()
{
@Override
public void insertUpdate( DocumentEvent e )
{
_okBtn.setEnabled( _varName.getText().length() > 0 );
}
@Override
public void removeUpdate( DocumentEvent e )
{
_okBtn.setEnabled( _varName.getText().length() > 0 );
}
@Override
public void changedUpdate( DocumentEvent e )
{
}
} );
c.anchor = GridBagConstraints.WEST;
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = iX;
c.gridy = iY++;
c.gridwidth = GridBagConstraints.REMAINDER;
c.gridheight = 1;
c.weightx = 1;
c.weighty = 0;
c.insets = new Insets( 0, 0, 0, 0 );
mainPanel.add( _varName, c );
_replaceAll = new LabCheckbox();
_replaceAll = new LabCheckbox( "Replace All Occurrences" );
// _replaceAll.setMnemonic( 'A' );
// _replaceAll.setDisplayedMnemonicIndex( 8 );
// _replaceAll.setSelected( true );
// c.anchor = GridBagConstraints.WEST;
// c.fill = GridBagConstraints.NONE;
// c.gridx = iX = 0;
// c.gridy = iY;
// c.gridwidth = GridBagConstraints.REMAINDER;
// c.gridheight = 1;
// c.weightx = 0;
// c.weighty = 0;
// c.insets = new Insets( 0, 0, 10, 0 );
// add( _replaceAll, c );
add( mainPanel, BorderLayout.CENTER );
JPanel buttonPanel = new JPanel();
buttonPanel.setBorder( BorderFactory.createEmptyBorder( 8, 8, 8, 8 ) );
FlowLayout layout = new FlowLayout( FlowLayout.RIGHT );
layout.setVgap( 0 );
buttonPanel.setLayout( layout );
_okBtn = new LabButton( new AbstractAction( "OK" )
{
@Override
public void actionPerformed( ActionEvent e )
{
extractVariable( _gosuEditor, _varName.getText(), _replaceAll.isSelected() );
setVisible( false );
}
} );
_okBtn.setEnabled( false );
_cancelBtn = new LabButton( new AbstractAction( "Cancel" )
{
@Override
public void actionPerformed( ActionEvent e )
{
ExtractVariablePopup.this.setVisible( false );
}
} );
buttonPanel.add( _okBtn );
buttonPanel.add( _cancelBtn );
add( buttonPanel, BorderLayout.SOUTH );
setSize( 240, 140 );
}
static void extractVariable( GosuEditor gosuEditor, String varName, boolean replaceAll )
{
IParsedElement rootScopeElement = findValidRootScopeElement( gosuEditor );
if( rootScopeElement == null )
{
throw new IllegalStateException( "Unable to extract a variable outside of a function or program" );
}
if( !verifyExpressionSelected( gosuEditor ) )
{
throw new IllegalStateException( "Unable to extract a variable unless an expression is selected" );
}
gosuEditor.getUndoManager().beginUndoAtom( "Extract Variable" );
try
{
String entireProgram = gosuEditor.getText();
Document document = gosuEditor.getEditor().getDocument();
int start = gosuEditor.getEditor().getSelectionStart();
int end = gosuEditor.getEditor().getSelectionEnd() - 1;
IParseTree deepestLocation = gosuEditor.getDeepestLocationSpanning( start, end );
int varInsertionPoint = deepestLocation.getOffset();
String selectedText = document.getText( varInsertionPoint, deepestLocation.getLength() );
boolean standaloneExpression = deepestLocation.getParsedElement().getParent() instanceof INoOpStatement;
if( replaceAll )
{
// //find all matches below the bounding element
// List matches = GosuRefactorUtil.findAllMatchingExpressionsWithinScope(
// selectedText,
// entireProgram,
// rootScopeElement,
// deepestLocation.getParsedElement() );
//
// //Find the dominating element for the matching elements
// IParsedElement dominatingElement = GosuRefactorUtil.findDominatingElement( matches );
//
// //insert just before this element
// varInsertionPoint = dominatingElement.getLocation().getOffset();
//
// //shift offset is how far we must shift back the replacedment due to the
// //delta between the replaced text and the variable name
// int shiftOffset = selectedText.length() - varName.length();
// int offset = 0;
//
// //For each match, replace
// for( IParsedElement elt : matches )
// {
// int eltStart = elt.getLocation().getOffset();
// int position = eltStart - offset;
// replaceStringInDocument( document, position, selectedText, varName );
// offset += shiftOffset;
// }
}
else
{
if( standaloneExpression )
{
document.remove( varInsertionPoint, selectedText.length() );
}
else
{
//If we are not replacing all, simply replace the single match
replaceStringInDocument( document, varInsertionPoint, selectedText, varName );
}
}
String varString = "";
while( !(deepestLocation.getParsedElement() instanceof IStatement) )
{
deepestLocation = deepestLocation.getParent();
}
int lineStart;
if( !standaloneExpression )
{
lineStart = TextComponentUtil.getLineStart( entireProgram, deepestLocation.getOffset() );
int i = lineStart;
while( Character.isWhitespace( entireProgram.charAt( i ) ) )
{
varString += entireProgram.charAt( i );
i++;
}
}
else
{
lineStart = varInsertionPoint;
}
varString += "var " + varName + " = " + selectedText + (standaloneExpression ? "" : "\n");
document.insertString( lineStart, varString, null );
}
catch( BadLocationException e )
{
throw new RuntimeException( e );
}
finally
{
gosuEditor.getUndoManager().endUndoAtom();
gosuEditor.parse();
}
}
private static void replaceStringInDocument( Document document, int position, String textToReplace, String replacementText )
throws BadLocationException
{
document.remove( position, textToReplace.length() );
document.insertString( position, replacementText, null );
}
private static IParsedElement findValidRootScopeElement( GosuEditor gosuEditor )
{
int start = gosuEditor.getEditor().getSelectionStart();
IParsedElement rootContainerElement = GosuRefactorUtil.boundingParent( gosuEditor.getParser().getLocations(),
start,
IProgram.class,
IClassFileStatement.class,
IFunctionStatement.class,
IPropertyStatement.class );
if( rootContainerElement == null )
{
return null;
}
else if( rootContainerElement instanceof IProgram ||
rootContainerElement instanceof IClassFileStatement )
{ //IClassFileStatement indicates a program
return rootContainerElement;
}
else
{
ArrayList stmtList = new ArrayList();
boolean eltFound = rootContainerElement.getContainedParsedElementsByType( IStatement.class, stmtList );
if( eltFound )
{
IStatement list = stmtList.get( 0 );
if( list.getLocation().contains( start ) )
{
return list;
}
}
return null;
}
}
public void showNow( GosuEditor gosuEditor )
{
_gosuEditor = gosuEditor;
IParsedElement rootScopeElement = findValidRootScopeElement( _gosuEditor );
if( rootScopeElement == null )
{
editor.util.EditorUtilities.displayError( "Unable to extract a variable" );
return;
}
boolean validExprSelected = verifyExpressionSelected( _gosuEditor );
if( !validExprSelected )
{
editor.util.EditorUtilities.displayError( "Cannot extract a variable unless a valid expression is selected" );
return;
}
editor.util.EditorUtilities.centerWindowInFrame( this, SwingUtilities.getWindowAncestor( gosuEditor ) );
setVisible( true );
}
private static boolean verifyExpressionSelected( GosuEditor gosuEditor )
{
int start = gosuEditor.getEditor().getSelectionStart();
int end = gosuEditor.getEditor().getSelectionEnd() - 1;
IParseTree deepestLocation = gosuEditor.getDeepestLocationSpanning( start, end );
if( deepestLocation.getParsedElement() instanceof IExpression )
{
if( deepestLocation.getOffset() == start &&
deepestLocation.getExtent() == end )
{
return true;
}
try
{
if( deepestLocation.getOffset() == start &&
deepestLocation.getExtent() == end - 1 &&
gosuEditor.getEditor().getText( end, 1 ).equals( ";" ) )
{
return true;
}
}
catch( BadLocationException e )
{
//ignore
}
}
return false;
}
}
