/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.ui.refactoring;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.contentassist.SubjectControlContentAssistant;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITableFontProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.contentassist.ContentAssistHandler;
import org.eclipse.wst.jsdt.core.IJavaScriptProject;
import org.eclipse.wst.jsdt.core.JavaScriptCore;
import org.eclipse.wst.jsdt.internal.corext.codemanipulation.StubUtility;
import org.eclipse.wst.jsdt.internal.corext.refactoring.ParameterInfo;
import org.eclipse.wst.jsdt.internal.corext.refactoring.StubTypeContext;
import org.eclipse.wst.jsdt.internal.ui.dialogs.TableTextCellEditor;
import org.eclipse.wst.jsdt.internal.ui.dialogs.TextFieldNavigationHandler;
import org.eclipse.wst.jsdt.internal.ui.refactoring.contentassist.ControlContentAssistHelper;
import org.eclipse.wst.jsdt.internal.ui.refactoring.contentassist.JavaTypeCompletionProcessor;
import org.eclipse.wst.jsdt.internal.ui.refactoring.contentassist.VariableNamesProcessor;
import org.eclipse.wst.jsdt.internal.ui.util.SWTUtil;
import org.eclipse.wst.jsdt.internal.ui.util.TableLayoutComposite;
/**
* A special control to edit and reorder method parameters.
*/
public class ChangeParametersControl extends Composite {
static final boolean SHOW_TYPES=false;
public static class Mode {
private final String fName;
private Mode(String name) {
fName= name;
}
public static final Mode EXTRACT_METHOD= new Mode("EXTRACT_METHOD"); //$NON-NLS-1$
public static final Mode CHANGE_METHOD_SIGNATURE= new Mode("CHANGE_METHOD_SIGNATURE"); //$NON-NLS-1$
public static final Mode INTRODUCE_PARAMETER= new Mode("INTRODUCE_PARAMETER"); //$NON-NLS-1$
public String toString() {
return fName;
}
public boolean canChangeTypes() {
return this == CHANGE_METHOD_SIGNATURE;
}
public boolean canAddParameters() {
return this == Mode.CHANGE_METHOD_SIGNATURE;
}
public boolean canChangeDefault() {
return this == Mode.CHANGE_METHOD_SIGNATURE;
}
}
private static class ParameterInfoContentProvider implements IStructuredContentProvider {
public Object[] getElements(Object inputElement) {
return removeMarkedAsDeleted((List) inputElement);
}
private ParameterInfo[] removeMarkedAsDeleted(List paramInfos){
List result= new ArrayList(paramInfos.size());
for (Iterator iter= paramInfos.iterator(); iter.hasNext();) {
ParameterInfo info= (ParameterInfo) iter.next();
if (! info.isDeleted())
result.add(info);
}
return (ParameterInfo[]) result.toArray(new ParameterInfo[result.size()]);
}
public void dispose() {
// do nothing
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
// do nothing
}
}
private static class ParameterInfoLabelProvider extends LabelProvider implements ITableLabelProvider, ITableFontProvider {
public Image getColumnImage(Object element, int columnIndex) {
return null;
}
public String getColumnText(Object element, int columnIndex) {
ParameterInfo info= (ParameterInfo) element;
switch (columnIndex) {
case TYPE_PROP:
return info.getNewTypeName();
case NEWNAME_PROP:
return info.getNewName();
case DEFAULT_PROP:
if (info.isAdded())
return info.getDefaultValue();
else
return "-"; //$NON-NLS-1$
default:
throw new IllegalArgumentException(columnIndex + ": " + element); //$NON-NLS-1$
}
}
public Font getFont(Object element, int columnIndex) {
ParameterInfo info= (ParameterInfo) element;
if (info.isAdded())
return JFaceResources.getFontRegistry().getBold(JFaceResources.DIALOG_FONT);
else
return null;
}
}
private class ParametersCellModifier implements ICellModifier {
public boolean canModify(Object element, String property) {
Assert.isTrue(element instanceof ParameterInfo);
if (JavaScriptCore.IS_ECMASCRIPT4 && property.equals(PROPERTIES[TYPE_PROP]))
return fMode.canChangeTypes();
else if (property.equals(PROPERTIES[NEWNAME_PROP]))
return true;
else if (property.equals(PROPERTIES[DEFAULT_PROP]))
return (((ParameterInfo)element).isAdded());
Assert.isTrue(false);
return false;
}
public Object getValue(Object element, String property) {
Assert.isTrue(element instanceof ParameterInfo);
if (JavaScriptCore.IS_ECMASCRIPT4 && property.equals(PROPERTIES[TYPE_PROP]))
return ((ParameterInfo) element).getNewTypeName();
else if (property.equals(PROPERTIES[NEWNAME_PROP]))
return ((ParameterInfo) element).getNewName();
else if (property.equals(PROPERTIES[DEFAULT_PROP]))
return ((ParameterInfo) element).getDefaultValue();
Assert.isTrue(false);
return null;
}
public void modify(Object element, String property, Object value) {
if (element instanceof TableItem)
element= ((TableItem) element).getData();
if (!(element instanceof ParameterInfo))
return;
boolean unchanged;
ParameterInfo parameterInfo= (ParameterInfo) element;
if (property.equals(PROPERTIES[NEWNAME_PROP])) {
unchanged= parameterInfo.getNewName().equals(value);
parameterInfo.setNewName((String) value);
} else if (property.equals(PROPERTIES[DEFAULT_PROP])) {
unchanged= parameterInfo.getDefaultValue().equals(value);
parameterInfo.setDefaultValue((String) value);
} else if (property.equals(PROPERTIES[TYPE_PROP])) {
unchanged= parameterInfo.getNewTypeName().equals(value);
parameterInfo.setNewTypeName((String) value);
} else {
throw new IllegalStateException();
}
if (! unchanged) {
ChangeParametersControl.this.fListener.parameterChanged(parameterInfo);
ChangeParametersControl.this.fTableViewer.update(parameterInfo, new String[] { property });
}
}
}
private static final String[] PROPERTIES_NO_RETURN = new String[] { RefactoringMessages.ChangeParametersControl_new, RefactoringMessages.ChangeParametersControl_default };
private static final String[] PROPERTIES_WITH_RETURN = new String[] { RefactoringMessages.ChangeParametersControl_type, RefactoringMessages.ChangeParametersControl_new, RefactoringMessages.ChangeParametersControl_default };
private static final String[] PROPERTIES= JavaScriptCore.IS_ECMASCRIPT4?PROPERTIES_WITH_RETURN:PROPERTIES_NO_RETURN;
private static final int TYPE_PROP= JavaScriptCore.IS_ECMASCRIPT4?0:-1;
private static final int NEWNAME_PROP= JavaScriptCore.IS_ECMASCRIPT4?1:0;
private static final int DEFAULT_PROP= JavaScriptCore.IS_ECMASCRIPT4?2:1;
private static final int ROW_COUNT= 7;
private final Mode fMode;
private final IParameterListChangeListener fListener;
private List fParameterInfos;
private final StubTypeContext fTypeContext;
private final String[] fParamNameProposals;
private ContentAssistHandler fNameContentAssistHandler;
private TableViewer fTableViewer;
private Button fUpButton;
private Button fDownButton;
private Button fEditButton;
private Button fAddButton;
private Button fRemoveButton;
public ChangeParametersControl(Composite parent, int style, String label, IParameterListChangeListener listener, Mode mode, StubTypeContext typeContext) {
this(parent, style, label, listener, mode, typeContext, new String[0]);
}
public ChangeParametersControl(Composite parent, int style, String label, IParameterListChangeListener listener, Mode mode) {
this(parent, style, label, listener, mode, null, new String[0]);
}
public ChangeParametersControl(Composite parent, int style, String label, IParameterListChangeListener listener, Mode mode, String[] paramNameProposals) {
this(parent, style, label, listener, mode, null, paramNameProposals);
}
/**
* @param label the label before the table or <code>null</code>
* @param typeContext the package in which to complete types
*/
private ChangeParametersControl(Composite parent, int style, String label, IParameterListChangeListener listener, Mode mode, StubTypeContext typeContext, String[] paramNameProposals) {
super(parent, style);
Assert.isNotNull(listener);
fListener= listener;
fMode= mode;
fTypeContext= typeContext;
fParamNameProposals= paramNameProposals;
GridLayout layout= new GridLayout();
layout.numColumns= 2;
layout.marginWidth= 0;
layout.marginHeight= 0;
setLayout(layout);
if (label != null) {
Label tableLabel= new Label(this, SWT.NONE);
GridData labelGd= new GridData();
labelGd.horizontalSpan= 2;
tableLabel.setLayoutData(labelGd);
tableLabel.setText(label);
}
createParameterList(this);
createButtonComposite(this);
}
public void setInput(List parameterInfos) {
Assert.isNotNull(parameterInfos);
fParameterInfos= parameterInfos;
fTableViewer.setInput(fParameterInfos);
if (fParameterInfos.size() > 0)
fTableViewer.setSelection(new StructuredSelection(fParameterInfos.get(0)));
}
public void editParameter(ParameterInfo info) {
fTableViewer.getControl().setFocus();
if (! info.isDeleted()) {
fTableViewer.setSelection(new StructuredSelection(info), true);
updateButtonsEnabledState();
editColumnOrNextPossible(NEWNAME_PROP);
return;
}
}
// ---- Parameter table -----------------------------------------------------------------------------------
private void createParameterList(Composite parent) {
TableLayoutComposite layouter= new TableLayoutComposite(parent, SWT.NONE);
addColumnLayoutData(layouter);
final Table table= new Table(layouter, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
TableColumn tc;
// if (SHOW_TYPES)
// {
if(JavaScriptCore.IS_ECMASCRIPT4) {
tc= new TableColumn(table, SWT.NONE, TYPE_PROP);
tc.setResizable(true);
tc.setText(SHOW_TYPES?RefactoringMessages.ChangeParametersControl_table_type:""); //$NON-NLS-1$
//
}
int index= NEWNAME_PROP;
// if (!SHOW_TYPES)
// index--;
tc= new TableColumn(table, SWT.NONE,index);
tc.setResizable(true);
tc.setText(RefactoringMessages.ChangeParametersControl_table_name);
if (fMode.canChangeDefault()){
index= DEFAULT_PROP;
// if (!SHOW_TYPES)
// index--;
tc= new TableColumn(table, SWT.NONE, index);
tc.setResizable(true);
tc.setText(RefactoringMessages.ChangeParametersControl_table_defaultValue);
}
GridData gd= new GridData(GridData.FILL_BOTH);
gd.heightHint= SWTUtil.getTableHeightHint(table, ROW_COUNT);
gd.widthHint= 40;
layouter.setLayoutData(gd);
fTableViewer= new TableViewer(table);
fTableViewer.setUseHashlookup(true);
fTableViewer.setContentProvider(new ParameterInfoContentProvider());
fTableViewer.setLabelProvider(new ParameterInfoLabelProvider());
fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
updateButtonsEnabledState();
}
});
table.addTraverseListener(new TraverseListener() {
public void keyTraversed(TraverseEvent e) {
if (e.detail == SWT.TRAVERSE_RETURN && e.stateMask == SWT.NONE) {
editColumnOrNextPossible(0);
e.detail= SWT.TRAVERSE_NONE;
}
}
});
table.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.keyCode == SWT.F2 && e.stateMask == SWT.NONE) {
editColumnOrNextPossible(0);
e.doit= false;
}
}
});
addCellEditors();
}
private void editColumnOrNextPossible(int column){
ParameterInfo[] selected= getSelectedElements();
if (selected.length != 1)
return;
int nextColumn= column;
do {
fTableViewer.editElement(selected[0], nextColumn);
if (fTableViewer.isCellEditorActive())
return;
nextColumn= nextColumn(nextColumn);
} while (nextColumn != column);
}
private void editColumnOrPrevPossible(int column){
ParameterInfo[] selected= getSelectedElements();
if (selected.length != 1)
return;
int prevColumn= column;
do {
fTableViewer.editElement(selected[0], prevColumn);
if (fTableViewer.isCellEditorActive())
return;
prevColumn= prevColumn(prevColumn);
} while (prevColumn != column);
}
private int nextColumn(int column) {
return (column >= getTable().getColumnCount() - 1) ? 0 : column + 1;
}
private int prevColumn(int column) {
return (column <= 0) ? getTable().getColumnCount() - 1 : column - 1;
}
private void addColumnLayoutData(TableLayoutComposite layouter) {
if (fMode.canChangeDefault()){
// layouter.addColumnData(new ColumnWeightData(33, true));
layouter.addColumnData(new ColumnWeightData(33, true));
layouter.addColumnData(new ColumnWeightData(34, true));
} else if (SHOW_TYPES){
layouter.addColumnData(new ColumnWeightData(50, true));
layouter.addColumnData(new ColumnWeightData(50, true));
}
else
{
layouter.addColumnData(new ColumnWeightData(1, true));
layouter.addColumnData(new ColumnWeightData(99, true));
}
}
private ParameterInfo[] getSelectedElements() {
ISelection selection= fTableViewer.getSelection();
if (selection == null)
return new ParameterInfo[0];
if (!(selection instanceof IStructuredSelection))
return new ParameterInfo[0];
List selected= ((IStructuredSelection) selection).toList();
return (ParameterInfo[]) selected.toArray(new ParameterInfo[selected.size()]);
}
// ---- Button bar --------------------------------------------------------------------------------------
private void createButtonComposite(Composite parent) {
Composite buttonComposite= new Composite(parent, SWT.NONE);
buttonComposite.setLayoutData(new GridData(GridData.FILL_VERTICAL));
GridLayout gl= new GridLayout();
gl.marginHeight= 0;
gl.marginWidth= 0;
buttonComposite.setLayout(gl);
if (fMode.canAddParameters())
fAddButton= createAddButton(buttonComposite);
fEditButton= createEditButton(buttonComposite);
if (fMode.canAddParameters())
fRemoveButton= createRemoveButton(buttonComposite);
if (buttonComposite.getChildren().length != 0)
addSpacer(buttonComposite);
fUpButton= createButton(buttonComposite, RefactoringMessages.ChangeParametersControl_buttons_move_up, true);
fDownButton= createButton(buttonComposite, RefactoringMessages.ChangeParametersControl_buttons_move_down, false);
updateButtonsEnabledState();
}
private void addSpacer(Composite parent) {
Label label= new Label(parent, SWT.NONE);
GridData gd= new GridData(GridData.FILL_HORIZONTAL);
gd.heightHint= 5;
label.setLayoutData(gd);
}
private void updateButtonsEnabledState() {
fUpButton.setEnabled(canMove(true));
fDownButton.setEnabled(canMove(false));
if (fEditButton != null)
fEditButton.setEnabled(getTableSelectionCount() == 1);
if (fAddButton != null)
fAddButton.setEnabled(true);
if (fRemoveButton != null)
fRemoveButton.setEnabled(getTableSelectionCount() != 0);
}
private int getTableSelectionCount() {
return getTable().getSelectionCount();
}
private int getTableItemCount() {
return getTable().getItemCount();
}
private Table getTable() {
return fTableViewer.getTable();
}
private Button createEditButton(Composite buttonComposite) {
Button button= new Button(buttonComposite, SWT.PUSH);
button.setText(RefactoringMessages.ChangeParametersControl_buttons_edit);
button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
SWTUtil.setButtonDimensionHint(button);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
try {
ParameterInfo[] selected= getSelectedElements();
Assert.isTrue(selected.length == 1);
ParameterInfo parameterInfo= selected[0];
ParameterEditDialog dialog= new ParameterEditDialog(getShell(), parameterInfo, fMode.canChangeTypes(), fMode.canChangeDefault(), fTypeContext);
dialog.open();
fListener.parameterChanged(parameterInfo);
fTableViewer.update(parameterInfo, PROPERTIES);
} finally {
fTableViewer.getControl().setFocus();
}
}
});
return button;
}
private Button createAddButton(Composite buttonComposite) {
Button button= new Button(buttonComposite, SWT.PUSH);
button.setText(RefactoringMessages.ChangeParametersControl_buttons_add);
button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
SWTUtil.setButtonDimensionHint(button);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
String[] excludedParamNames= new String[fParameterInfos.size()];
for (int i= 0; i < fParameterInfos.size(); i++) {
ParameterInfo info= (ParameterInfo) fParameterInfos.get(i);
excludedParamNames[i]= info.getNewName();
}
IJavaScriptProject javaProject= fTypeContext.getCuHandle().getJavaScriptProject();
String newParamName= StubUtility.suggestArgumentName(javaProject, RefactoringMessages.ChangeParametersControl_new_parameter_default_name, excludedParamNames);
ParameterInfo newInfo= ParameterInfo.createInfoForAddedParameter("Object", newParamName, "null"); //$NON-NLS-1$ //$NON-NLS-2$
int insertIndex= fParameterInfos.size();
for (int i= fParameterInfos.size() - 1; i >= 0; i--) {
ParameterInfo info= (ParameterInfo) fParameterInfos.get(i);
if (info.isNewVarargs()) {
insertIndex= i;
break;
}
}
fParameterInfos.add(insertIndex, newInfo);
fListener.parameterAdded(newInfo);
fTableViewer.refresh();
fTableViewer.getControl().setFocus();
fTableViewer.setSelection(new StructuredSelection(newInfo), true);
updateButtonsEnabledState();
editColumnOrNextPossible(0);
}
});
return button;
}
private Button createRemoveButton(Composite buttonComposite) {
final Button button= new Button(buttonComposite, SWT.PUSH);
button.setText(RefactoringMessages.ChangeParametersControl_buttons_remove);
button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
SWTUtil.setButtonDimensionHint(button);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
int index= getTable().getSelectionIndices()[0];
ParameterInfo[] selected= getSelectedElements();
for (int i= 0; i < selected.length; i++) {
if (selected[i].isAdded())
fParameterInfos.remove(selected[i]);
else
selected[i].markAsDeleted();
}
restoreSelection(index);
}
private void restoreSelection(int index) {
fTableViewer.refresh();
fTableViewer.getControl().setFocus();
int itemCount= getTableItemCount();
if (itemCount != 0 && index >= itemCount) {
index= itemCount - 1;
getTable().setSelection(index);
}
fListener.parameterListChanged();
updateButtonsEnabledState();
}
});
return button;
}
private Button createButton(Composite buttonComposite, String text, final boolean up) {
Button button= new Button(buttonComposite, SWT.PUSH);
button.setText(text);
button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
SWTUtil.setButtonDimensionHint(button);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
ISelection savedSelection= fTableViewer.getSelection();
if (savedSelection == null)
return;
ParameterInfo[] selection= getSelectedElements();
if (selection.length == 0)
return;
if (up) {
moveUp(selection);
} else {
moveDown(selection);
}
fTableViewer.refresh();
fTableViewer.setSelection(savedSelection);
fListener.parameterListChanged();
fTableViewer.getControl().setFocus();
}
});
return button;
}
//---- editing -----------------------------------------------------------------------------------------------
private void addCellEditors() {
fTableViewer.setColumnProperties(PROPERTIES);
final TableTextCellEditor editors[]= new TableTextCellEditor[PROPERTIES.length];
if(JavaScriptCore.IS_ECMASCRIPT4) editors[TYPE_PROP]= new TableTextCellEditor(fTableViewer, TYPE_PROP);
editors[NEWNAME_PROP]= new TableTextCellEditor(fTableViewer, NEWNAME_PROP);
editors[DEFAULT_PROP]= new TableTextCellEditor(fTableViewer, DEFAULT_PROP);
if (fMode.canChangeTypes() && (JavaScriptCore.IS_ECMASCRIPT4) ) {
SubjectControlContentAssistant assistant= installParameterTypeContentAssist(editors[TYPE_PROP].getText());
editors[TYPE_PROP].setContentAssistant(assistant);
}
if (fParamNameProposals.length > 0 ) {
SubjectControlContentAssistant assistant= installParameterNameContentAssist(editors[NEWNAME_PROP].getText());
editors[NEWNAME_PROP].setContentAssistant(assistant);
}
for (int i = 0; i < editors.length; i++) {
final int editorColumn= i;
final TableTextCellEditor editor = editors[i];
// support tabbing between columns while editing:
editor.getText().addTraverseListener(new TraverseListener() {
public void keyTraversed(TraverseEvent e) {
switch (e.detail) {
case SWT.TRAVERSE_TAB_NEXT :
editColumnOrNextPossible(nextColumn(editorColumn));
e.detail= SWT.TRAVERSE_NONE;
break;
case SWT.TRAVERSE_TAB_PREVIOUS :
editColumnOrPrevPossible(prevColumn(editorColumn));
e.detail= SWT.TRAVERSE_NONE;
break;
default :
break;
}
}
});
TextFieldNavigationHandler.install(editor.getText());
}
editors[NEWNAME_PROP].setActivationListener(new TableTextCellEditor.IActivationListener(){
public void activate() {
ParameterInfo[] selected= getSelectedElements();
if (selected.length == 1 && fNameContentAssistHandler != null) {
fNameContentAssistHandler.setEnabled(selected[0].isAdded());
}
}
});
fTableViewer.setCellEditors(editors);
fTableViewer.setCellModifier(new ParametersCellModifier());
}
private SubjectControlContentAssistant installParameterTypeContentAssist(Text text) {
JavaTypeCompletionProcessor processor= new JavaTypeCompletionProcessor(true, false);
if (fTypeContext == null)
processor.setCompletionContext(null, null, null);
else
processor.setCompletionContext(fTypeContext.getCuHandle(), fTypeContext.getBeforeString(), fTypeContext.getAfterString());
SubjectControlContentAssistant contentAssistant= ControlContentAssistHelper.createJavaContentAssistant(processor);
ContentAssistHandler.createHandlerForText(text, contentAssistant);
return contentAssistant;
}
private SubjectControlContentAssistant installParameterNameContentAssist(Text text) {
VariableNamesProcessor processor= new VariableNamesProcessor(fParamNameProposals);
SubjectControlContentAssistant contentAssistant= ControlContentAssistHelper.createJavaContentAssistant(processor);
fNameContentAssistHandler= ContentAssistHandler.createHandlerForText(text, contentAssistant);
return contentAssistant;
}
//---- change order ----------------------------------------------------------------------------------------
private void moveUp(ParameterInfo[] selection) {
moveUp(fParameterInfos, Arrays.asList(selection));
}
private void moveDown(ParameterInfo[] selection) {
Collections.reverse(fParameterInfos);
moveUp(fParameterInfos, Arrays.asList(selection));
Collections.reverse(fParameterInfos);
}
private static void moveUp(List elements, List move) {
List res= new ArrayList(elements.size());
List deleted= new ArrayList();
Object floating= null;
for (Iterator iter= elements.iterator(); iter.hasNext();) {
Object curr= iter.next();
if (move.contains(curr)) {
res.add(curr);
} else if (((ParameterInfo) curr).isDeleted()) {
deleted.add(curr);
} else {
if (floating != null)
res.add(floating);
floating= curr;
}
}
if (floating != null) {
res.add(floating);
}
res.addAll(deleted);
elements.clear();
for (Iterator iter= res.iterator(); iter.hasNext();) {
elements.add(iter.next());
}
}
private boolean canMove(boolean up) {
int notDeletedInfosCount= getNotDeletedInfosCount();
if (notDeletedInfosCount == 0)
return false;
int[] indc= getTable().getSelectionIndices();
if (indc.length == 0)
return false;
int invalid= up ? 0 : notDeletedInfosCount - 1;
for (int i= 0; i < indc.length; i++) {
if (indc[i] == invalid)
return false;
}
return true;
}
private int getNotDeletedInfosCount(){
if (fParameterInfos == null) // during initialization
return 0;
int result= 0;
for (Iterator iter= fParameterInfos.iterator(); iter.hasNext();) {
ParameterInfo info= (ParameterInfo) iter.next();
if (! info.isDeleted())
result++;
}
return result;
}
}