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package org.eclipse.jdt.internal.ui.refactoring.actions;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.actions.SelectionDispatchAction;
import org.eclipse.jdt.internal.corext.Assert;
import org.eclipse.jdt.internal.corext.refactoring.structure.MoveMembersRefactoring;
import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.SelectionConverter;
import org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor;
import org.eclipse.jdt.internal.ui.preferences.JavaPreferencesSettings;
import org.eclipse.jdt.internal.ui.refactoring.MoveMembersWizard;
import org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages;
import org.eclipse.jdt.internal.ui.refactoring.RefactoringWizard;
import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
public class MoveMembersAction extends SelectionDispatchAction{
private MoveMembersRefactoring fRefactoring;
private CompilationUnitEditor fEditor;
public MoveMembersAction(IWorkbenchSite site) {
super(site);
setText(RefactoringMessages.getString("RefactoringGroup.move_label"));//$NON-NLS-1$
}
public MoveMembersAction(CompilationUnitEditor editor) {
this(editor.getEditorSite());
fEditor= editor;
setEnabled(SelectionConverter.canOperateOn(fEditor));
}
/*
* @see SelectionDispatchAction#selectionChanged(IStructuredSelection)
*/
protected void selectionChanged(IStructuredSelection selection) {
setEnabled(canEnable(selection));
}
/*
* @see SelectionDispatchAction#selectionChanged(ITextSelection)
*/
protected void selectionChanged(ITextSelection selection) {
}
/*
* @see SelectionDispatchAction#run(IStructuredSelection)
*/
protected void run(IStructuredSelection selection) {
startRefactoring();
}
/*
* @see SelectionDispatchAction#run(ITextSelection)
*/
protected void run(ITextSelection selection) {
if (! canRun(selection)){
String unavailable= RefactoringMessages.getString("MoveMembersAction.unavailable"); //$NON-NLS-1$;
MessageDialog.openInformation(getShell(), RefactoringMessages.getString("OpenRefactoringWizardAction.unavailable"), unavailable); //$NON-NLS-1$
fRefactoring= null;
return;
}
startRefactoring();
}
private boolean canEnable(IStructuredSelection selection){
if (selection.isEmpty())
return false;
for (Iterator iter= selection.iterator(); iter.hasNext(); ) {
if (! (iter.next() instanceof IMember))
return false;
}
return shouldAcceptElements(selection.toArray());
}
private boolean canRun(ITextSelection selection){
IJavaElement[] elements= resolveElements();
if (elements.length != 1)
return false;
return (elements[0] instanceof IMember) && shouldAcceptElements(elements);
}
private MoveMembersRefactoring createNewRefactoringInstance(Object[] elements){
Set memberSet= new HashSet();
memberSet.addAll(Arrays.asList(elements));
IMember[] methods= (IMember[]) memberSet.toArray(new IMember[memberSet.size()]);
return new MoveMembersRefactoring(methods, JavaPreferencesSettings.getCodeGenerationSettings());
}
private boolean shouldAcceptElements(Object[] elements) {
try{
fRefactoring= createNewRefactoringInstance(elements);
return fRefactoring.checkPreactivation().isOK();
} catch (JavaModelException e) {
// http://bugs.eclipse.org/bugs/show_bug.cgi?id=19253
if (JavaModelUtil.filterNotPresentException(e))
JavaPlugin.log(e); //this happen on selection changes in viewers - do not show ui if fails, just log
return false;
}
}
private IJavaElement[] resolveElements() {
return SelectionConverter.codeResolveHandled(fEditor, getShell(), RefactoringMessages.getString("OpenRefactoringWizardAction.refactoring")); //$NON-NLS-1$
}
private RefactoringWizard createWizard(){
String title= RefactoringMessages.getString("RefactoringGroup.move_Members"); //$NON-NLS-1$
//FIX ME: wrong
String helpId= "HELPID"; //$NON-NLS-1$
return new MoveMembersWizard(fRefactoring, title, helpId);
}
private void startRefactoring() {
Assert.isNotNull(fRefactoring);
try{
Object newElementToProcess= new RefactoringStarter().activate(fRefactoring, createWizard(), RefactoringMessages.getString("OpenRefactoringWizardAction.refactoring"), true); //$NON-NLS-1$
if (newElementToProcess == null)
return;
IStructuredSelection mockSelection= new StructuredSelection(newElementToProcess);
selectionChanged(mockSelection);
if (isEnabled())
run(mockSelection);
else
MessageDialog.openInformation(JavaPlugin.getActiveWorkbenchShell(), RefactoringMessages.getString("MoveMembersAction.error.title"), RefactoringMessages.getString("MoveMembersAction.error.message")); //$NON-NLS-1$ //$NON-NLS-2$
} catch (JavaModelException e){
ExceptionHandler.handle(e, RefactoringMessages.getString("OpenRefactoringWizardAction.refactoring"), RefactoringMessages.getString("OpenRefactoringWizardAction.exception")); //$NON-NLS-1$ //$NON-NLS-2$
}
}
}
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