org.eclipse.jface.text.IEditingSupport#org.eclipse.jdt.internal.ui.javaeditor.EditorUtility源码实例Demo

@Override
public CompletableFuture<List<? extends ICodeMining>> provideCodeMinings(ITextViewer viewer,
		IProgressMonitor monitor) {
	return CompletableFuture.supplyAsync(() -> {
		monitor.isCanceled();
		ITextEditor textEditor = super.getAdapter(ITextEditor.class);
		ITypeRoot unit = EditorUtility.getEditorInputJavaElement(textEditor, true);
		if (unit == null) {
			return Collections.emptyList();
		}
		try {
			IJavaElement[] elements = unit.getChildren();
			List<ICodeMining> minings = new ArrayList<>(elements.length);
			collectMinings(unit, textEditor, unit.getChildren(), minings, viewer, monitor);
			monitor.isCanceled();
			return minings;
		} catch (JavaModelException e) {
			// Should never occur
		}
		return Collections.emptyList();
	});
}
 

@Override
public CompletableFuture<List<? extends ICodeMining>> provideCodeMinings(ITextViewer viewer,
		IProgressMonitor monitor) {
	this.viewer = viewer;
	return CompletableFuture.supplyAsync(() -> {
		monitor.isCanceled();
		ITextEditor textEditor = super.getAdapter(ITextEditor.class);
		ITypeRoot unit = EditorUtility.getEditorInputJavaElement(textEditor, true);
		if (unit == null) {
			return null;
		}
		try {
			IJavaElement[] elements = unit.getChildren();
			List<ICodeMining> minings = new ArrayList<>(elements.length);
			collectCodeMinings(unit, elements, minings, viewer, monitor);
			monitor.isCanceled();
			return minings;
		} catch (JavaModelException e) {
			// TODO: what should we done when there are some errors?
		}
		return null;
	});
}
 

@Override
public CompletableFuture<List<? extends ICodeMining>> provideCodeMinings(ITextViewer viewer,
		IProgressMonitor monitor) {
	return CompletableFuture.supplyAsync(() -> {
		monitor.isCanceled();
		ITextEditor textEditor = super.getAdapter(ITextEditor.class);
		ITypeRoot unit = EditorUtility.getEditorInputJavaElement(textEditor, true);
		if (unit == null) {
			return null;
		}
		List<ICodeMining> minings = new ArrayList<>();
		collectCodeMinings(unit, textEditor, viewer, minings);
		monitor.isCanceled();
		return minings;
	});
}
 

@Override
public CompletableFuture<List<? extends ICodeMining>> provideCodeMinings(ITextViewer viewer,
		IProgressMonitor monitor) {
	return CompletableFuture.supplyAsync(() -> {
		monitor.isCanceled();
		ITextEditor textEditor = super.getAdapter(ITextEditor.class);
		ITypeRoot unit = EditorUtility.getEditorInputJavaElement(textEditor, true);
		if (unit == null) {
			return Collections.emptyList();
		}
		fViewer = viewer;
		fUnit = unit;
		try {
			List<ICodeMining> minings = new ArrayList<>();
			collectMinings(unit, textEditor, unit.getChildren(), minings, viewer, monitor);
			monitor.isCanceled();
			return minings;
		} catch (JavaModelException e) {
			// TODO: what should we done when there are some errors?
		}
		return Collections.emptyList();
	});
}
 

/**
 * This method is used by the test-framework, to catch the thrown exceptions
 * and report it to the user.
 *
 * @see #run(IMarker)
 */
private void runInternal(IMarker marker) throws CoreException {
    Assert.isNotNull(marker);

    PendingRewrite pending = resolveWithoutWriting(marker);
    if (pending == null) {
        return;
    }

    try {
        IRegion region = completeRewrite(pending);
        if (region == null) {
            return;
        }
        IEditorPart part = EditorUtility.isOpenInEditor(pending.originalUnit);
        if (part instanceof ITextEditor) {
            ((ITextEditor) part).selectAndReveal(region.getOffset(), region.getLength());
        }
    } finally {
        pending.originalUnit.discardWorkingCopy();
    }
}
 

@Override
public void run(IMarker marker) {
  try {
    IEditorPart part = EditorUtility.isOpenInEditor(cu);
    if (part == null) {
      part = JavaUI.openInEditor(cu, true, false);
      if (part instanceof ITextEditor) {
        ((ITextEditor) part).selectAndReveal(offset, length);
      }
    }
    if (part != null) {
      IEditorInput input = part.getEditorInput();
      IDocument doc = JavaPlugin.getDefault().getCompilationUnitDocumentProvider().getDocument(
          input);
      proposal.apply(doc);
    }
  } catch (CoreException e) {
    CorePluginLog.logError(e);
  }
}
 

@Override
public void run(IStructuredSelection selection) {
	IMember[] members= getSelectedMembers(selection);
	if (members == null || members.length == 0) {
		return;
	}

	try {
		ICompilationUnit cu= members[0].getCompilationUnit();
		if (!ActionUtil.isEditable(getShell(), cu)) {
			return;
		}

		// open the editor, forces the creation of a working copy
		IEditorPart editor= JavaUI.openInEditor(cu);

		if (ElementValidator.check(members, getShell(), getDialogTitle(), false))
			run(members);
		JavaModelUtil.reconcile(cu);
		EditorUtility.revealInEditor(editor, members[0]);

	} catch (CoreException e) {
		ExceptionHandler.handle(e, getShell(), getDialogTitle(), ActionMessages.AddJavaDocStubsAction_error_actionFailed);
	}
}
 

public void init(IWorkbench workbench, IStructuredSelection structuredSelection) {
	IWorkbenchWindow window= workbench.getActiveWorkbenchWindow();
	List<?> selected= Collections.EMPTY_LIST;
	if (window != null) {
		ISelection selection= window.getSelectionService().getSelection();
		if (selection instanceof IStructuredSelection) {
			selected= ((IStructuredSelection) selection).toList();
		} else {
			IJavaElement element= EditorUtility.getActiveEditorJavaInput();
			if (element != null) {
				selected= Arrays.asList(element);
			}
		}
	}
	fStore= new JavadocOptionsManager(fXmlJavadocFile, getDialogSettings(), selected);
}
 

private void open(KeyReference keyReference) {
	if (keyReference == null)
		return;

	try {
		IEditorPart part= keyReference.element != null ? EditorUtility.openInEditor(keyReference.element, true) : EditorUtility.openInEditor(keyReference.resource, true);
		if (part != null)
			EditorUtility.revealInEditor(part, keyReference.offset, keyReference.length);
	} catch (PartInitException x) {

		String message= null;

		IWorkbenchAdapter wbAdapter= (IWorkbenchAdapter)((IAdaptable)keyReference).getAdapter(IWorkbenchAdapter.class);
		if (wbAdapter != null)
			message= Messages.format(PropertiesFileEditorMessages.OpenAction_error_messageArgs,
					new String[] { wbAdapter.getLabel(keyReference), x.getLocalizedMessage() } );

		if (message == null)
			message= Messages.format(PropertiesFileEditorMessages.OpenAction_error_message, x.getLocalizedMessage());

		MessageDialog.openError(fShell,
			PropertiesFileEditorMessages.OpenAction_error_messageProblems,
			message);
	}
}
 

private void revealElementInEditor(Object elem, StructuredViewer originViewer) {
	// only allow revealing when the type hierarchy is the active page
	// no revealing after selection events due to model changes

	if (getSite().getPage().getActivePart() != this) {
		return;
	}

	if (fSelectionProviderMediator.getViewerInFocus() != originViewer) {
		return;
	}

	IEditorPart editorPart= EditorUtility.isOpenInEditor(elem);
	if (editorPart != null && (elem instanceof IJavaElement)) {
		getSite().getPage().removePartListener(fPartListener);
		getSite().getPage().bringToTop(editorPart);
		EditorUtility.revealInEditor(editorPart, (IJavaElement) elem);
		getSite().getPage().addPartListener(fPartListener);
	}
}
 

/**
 * Computes the state mask for the given modifier string.
 *
 * @param modifiers	the string with the modifiers, separated by '+', '-', ';', ',' or '.'
 * @return the state mask or -1 if the input is invalid
 */
public static int computeStateMask(String modifiers) {
	if (modifiers == null)
		return -1;

	if (modifiers.length() == 0)
		return SWT.NONE;

	int stateMask= 0;
	StringTokenizer modifierTokenizer= new StringTokenizer(modifiers, ",;.:+-* "); //$NON-NLS-1$
	while (modifierTokenizer.hasMoreTokens()) {
		int modifier= EditorUtility.findLocalizedModifier(modifierTokenizer.nextToken());
		if (modifier == 0 || (stateMask & modifier) == modifier)
			return -1;
		stateMask= stateMask | modifier;
	}
	return stateMask;
}
 

public void run(IMarker marker) {
	try {
		IEditorPart part= EditorUtility.isOpenInEditor(fCompilationUnit);
		if (part == null) {
			part= JavaUI.openInEditor(fCompilationUnit, true, false);
			if (part instanceof ITextEditor) {
				((ITextEditor) part).selectAndReveal(fOffset, fLength);
			}
		}
		if (part != null) {
			IEditorInput input= part.getEditorInput();
			IDocument doc= JavaPlugin.getDefault().getCompilationUnitDocumentProvider().getDocument(input);
			fProposal.apply(doc);
		}
	} catch (CoreException e) {
		JavaPlugin.log(e);
	}
}
 

private String getProjectPath(IStructuredSelection selection) {
	Object selectedElement= null;
	if (selection == null || selection.isEmpty()) {
		selectedElement= EditorUtility.getActiveEditorJavaInput();
	} else if (selection.size() == 1) {
		selectedElement= selection.getFirstElement();
	}

	if (selectedElement instanceof IResource) {
		IProject proj= ((IResource)selectedElement).getProject();
		if (proj != null) {
			return proj.getFullPath().makeRelative().toString();
		}
	} else if (selectedElement instanceof IJavaElement) {
		IJavaProject jproject= ((IJavaElement)selectedElement).getJavaProject();
		if (jproject != null) {
			return jproject.getProject().getFullPath().makeRelative().toString();
		}
	}

	return null;
}
 

@Override
protected List provideCodeMinings(ITextViewer viewer, IJavaStackFrame frame, IProgressMonitor monitor) {
	List<ICodeMining> minings = new ArrayList<>();
	ITextEditor textEditor = super.getAdapter(ITextEditor.class);
	ITypeRoot unit = EditorUtility.getEditorInputJavaElement(textEditor, true);
	if (unit == null) {
		return minings;
	}
	CompilationUnit cu = SharedASTProvider.getAST(unit, SharedASTProvider.WAIT_YES, null);
	JavaDebugElementCodeMiningASTVisitor visitor = new JavaDebugElementCodeMiningASTVisitor(frame, cu, viewer,
			minings, this);
	cu.accept(visitor);
	return minings;
}
 

public static IEditorReference[] getOpenJavaEditors(IProject project) {
  List<IEditorReference> projectOpenJavaEditors = new ArrayList<IEditorReference>();
  try {
    IWorkbenchPage page = JavaPlugin.getActivePage();
    if (page != null) {
      // Iterate through all the open editors
      IEditorReference[] openEditors = page.getEditorReferences();
      for (IEditorReference openEditor : openEditors) {
        IEditorPart editor = openEditor.getEditor(false);

        // Only look for Java Editor and subclasses
        if (editor instanceof CompilationUnitEditor) {
          IEditorInput input = openEditor.getEditorInput();
          IJavaProject inputProject = EditorUtility.getJavaProject(input);

          // See if the editor is editing a file in this project
          if (inputProject != null && inputProject.getProject().equals(project)) {
            projectOpenJavaEditors.add(openEditor);
          }
        }
      }
    }
  } catch (PartInitException e) {
    GWTPluginLog.logError(e);
  }

  return projectOpenJavaEditors.toArray(new IEditorReference[0]);
}
 

@Override
protected void doSetInput(IEditorInput input) throws CoreException {
  IJavaProject javaProject = EditorUtility.getJavaProject(input);

  if (javaProject != null && GWTNature.isGWTProject(javaProject.getProject())) {
    // Use GWT partitioning if the compilation unit is in a GWT project
    inputPartitioning = GWTPartitions.GWT_PARTITIONING;
  } else {
    // Otherwise, use Java partitioning to emulate the Java editor
    inputPartitioning = IJavaPartitions.JAVA_PARTITIONING;
  }

  super.doSetInput(input);
}
 

/**
 * Note: This constructor is for internal use only. Clients should not call this constructor.
 * @param editor the Java editor
 *
 * @noreference This constructor is not intended to be referenced by clients.
 */
public OpenAction(JavaEditor editor) {
	this(editor.getEditorSite());
	fEditor= editor;
	setText(ActionMessages.OpenAction_declaration_label);
	setEnabled(EditorUtility.getEditorInputJavaElement(fEditor, false) != null);
}
 

@Override
public void apply(IDocument document) {
	try {
		ICompilationUnit unit= getCompilationUnit();
		IEditorPart part= null;
		if (unit.getResource().exists()) {
			boolean canEdit= performValidateEdit(unit);
			if (!canEdit) {
				return;
			}
			part= EditorUtility.isOpenInEditor(unit);
			if (part == null) {
				part= JavaUI.openInEditor(unit);
				if (part != null) {
					fSwitchedEditor= true;
					document= JavaUI.getDocumentProvider().getDocument(part.getEditorInput());
				}
			}
			IWorkbenchPage page= JavaPlugin.getActivePage();
			if (page != null && part != null) {
				page.bringToTop(part);
			}
			if (part != null) {
				part.setFocus();
			}
		}
		performChange(part, document);
	} catch (CoreException e) {
		ExceptionHandler.handle(e, CorrectionMessages.CUCorrectionProposal_error_title, CorrectionMessages.CUCorrectionProposal_error_message);
	}
}
 

/**
 * Links to editor (if option enabled)
 * @param selection the selection
 */
private void linkToEditor(ISelection selection) {
	Object obj= SelectionUtil.getSingleElement(selection);
	if (obj != null) {
		IEditorPart part= EditorUtility.isOpenInEditor(obj);
		if (part != null) {
			IWorkbenchPage page= getSite().getPage();
			page.bringToTop(part);
			if (obj instanceof IJavaElement)
				EditorUtility.revealInEditor(part, (IJavaElement)obj);
		}
	}
}
 

private boolean inputIsSelected(IEditorInput input) {
	IStructuredSelection selection= (IStructuredSelection)fViewer.getSelection();
	if (selection.size() != 1)
		return false;

	IEditorInput selectionAsInput= EditorUtility.getEditorInput(selection.getFirstElement());
	return input.equals(selectionAsInput);
}
 

public static IEditorPart isOpenInEditor(Object elem) {
    IJavaElement javaElement= null;
    if (elem instanceof MethodWrapper) {
        javaElement= ((MethodWrapper) elem).getMember();
    } else if (elem instanceof CallLocation) {
        javaElement= ((CallLocation) elem).getMember();
    }
    if (javaElement != null) {
        return EditorUtility.isOpenInEditor(javaElement);
    }
    return null;
}
 

@Override
public void dragStart(DragSourceEvent event) {
	fEditorInputDatas= new ArrayList<EditorInputData>();

	ISelection selection= fProvider.getSelection();
	if (selection instanceof IStructuredSelection) {
		IStructuredSelection structuredSelection= (IStructuredSelection) selection;
		for (Iterator<?> iter= structuredSelection.iterator(); iter.hasNext();) {
			Object element= iter.next();
			IEditorInput editorInput= EditorUtility.getEditorInput(element);
			if (editorInput != null && editorInput.getPersistable() != null) {
				try {
					String editorId= EditorUtility.getEditorID(editorInput);
					// see org.eclipse.ui.internal.ide.EditorAreaDropAdapter.openNonExternalEditor(..):
					IEditorRegistry editorReg= PlatformUI.getWorkbench().getEditorRegistry();
					IEditorDescriptor editorDesc= editorReg.findEditor(editorId);
					if (editorDesc != null && !editorDesc.isOpenExternal()) {
						fEditorInputDatas.add(EditorInputTransfer.createEditorInputData(editorId, editorInput));
					}
				} catch (PartInitException e) {
					JavaPlugin.log(e);
				}
			}
		}
	}

	event.doit= fEditorInputDatas.size() > 0;
}
 

public IEditorPart openElement(Object element) throws PartInitException {
	IWorkbenchPage wbPage= JavaPlugin.getActivePage();
	IEditorPart editor;
	if (NewSearchUI.reuseEditor())
		editor= showWithReuse(element, wbPage);
	else
		editor= showWithoutReuse(element);

	if (element instanceof IJavaElement)
		EditorUtility.revealInEditor(editor, (IJavaElement) element);

	return editor;
}
 

private IEditorPart showWithoutReuse(Object element) throws PartInitException {
	try {
		return EditorUtility.openInEditor(element, false);
	} catch (PartInitException e) {
		if (e.getStatus().getCode() != IJavaStatusConstants.EDITOR_NO_EDITOR_INPUT) {
			throw e;
		}
	}
	return null;
}
 

private IEditorPart showWithReuse(Object element, IWorkbenchPage wbPage) throws PartInitException {
	IEditorInput input= EditorUtility.getEditorInput(element);
	if (input == null)
		return null;
	String editorID= EditorUtility.getEditorID(input);
	return showInEditor(wbPage, input, editorID);
}
 

@Override
public final  void run() {
	IJavaElement inputElement= EditorUtility.getEditorInputJavaElement(fEditor, false);
	if (!(inputElement instanceof ITypeRoot && inputElement.exists()))
		return;

	ITypeRoot typeRoot= (ITypeRoot) inputElement;
	ISourceRange sourceRange;
	try {
		sourceRange= typeRoot.getSourceRange();
		if (sourceRange == null || sourceRange.getLength() == 0) {
			MessageDialog.openInformation(fEditor.getEditorSite().getShell(),
				SelectionActionMessages.StructureSelect_error_title,
				SelectionActionMessages.StructureSelect_error_message);
			return;
		}
	} catch (JavaModelException e) {
	}
	ITextSelection selection= getTextSelection();
	ISourceRange newRange= getNewSelectionRange(createSourceRange(selection), typeRoot);
	// Check if new selection differs from current selection
	if (selection.getOffset() == newRange.getOffset() && selection.getLength() == newRange.getLength())
		return;
	fSelectionHistory.remember(new SourceRange(selection.getOffset(), selection.getLength()));
	try {
		fSelectionHistory.ignoreSelectionChanges();
		fEditor.selectAndReveal(newRange.getOffset(), newRange.getLength());
	} finally {
		fSelectionHistory.listenToSelectionChanges();
	}
}
 

public static IEditorPart openDeclaration(IJavaElement element) throws PartInitException, JavaModelException {
	if (!(element instanceof IPackageFragment)) {
		return JavaUI.openInEditor(element);
	}
	
	IPackageFragment packageFragment= (IPackageFragment) element;
	ITypeRoot typeRoot;
	IPackageFragmentRoot root= (IPackageFragmentRoot) packageFragment.getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT);
	if (root.getKind() == IPackageFragmentRoot.K_BINARY) {
		typeRoot= packageFragment.getClassFile(JavaModelUtil.PACKAGE_INFO_CLASS);
	} else {
		typeRoot= packageFragment.getCompilationUnit(JavaModelUtil.PACKAGE_INFO_JAVA);
	}

	// open the package-info file in editor if one exists
	if (typeRoot.exists())
		return JavaUI.openInEditor(typeRoot);

	// open the package.html file in editor if one exists
	Object[] nonJavaResources= packageFragment.getNonJavaResources();
	for (Object nonJavaResource : nonJavaResources) {
		if (nonJavaResource instanceof IFile) {
			IFile file= (IFile) nonJavaResource;
			if (file.exists() && JavaModelUtil.PACKAGE_HTML.equals(file.getName())) {
				return EditorUtility.openInEditor(file, true);
			}
		}
	}

	// select the package in the Package Explorer if there is no associated package Javadoc file
	PackageExplorerPart view= (PackageExplorerPart) JavaPlugin.getActivePage().showView(JavaUI.ID_PACKAGES);
	view.tryToReveal(packageFragment);
	return null;
}
 

@Override
public void install(ITextViewer textViewer) {
	super.install(textViewer);

	fPartListener= new PartListener();
	IWorkbenchPartSite site= fTextEditor.getSite();
	IWorkbenchWindow window= site.getWorkbenchWindow();
	window.getPartService().addPartListener(fPartListener);

	fActivationListener= new ActivationListener(textViewer.getTextWidget());
	Shell shell= window.getShell();
	shell.addShellListener(fActivationListener);

	fJavaElementChangedListener= new ElementChangedListener();
	JavaCore.addElementChangedListener(fJavaElementChangedListener);

	fResourceChangeListener= new ResourceChangeListener();
	IWorkspace workspace= JavaPlugin.getWorkspace();
	workspace.addResourceChangeListener(fResourceChangeListener);

	fPropertyChangeListener= new IPropertyChangeListener() {
		public void propertyChange(PropertyChangeEvent event) {
			if (SpellingService.PREFERENCE_SPELLING_ENABLED.equals(event.getProperty()) || SpellingService.PREFERENCE_SPELLING_ENGINE.equals(event.getProperty()))
				forceReconciling();
		}
	};
	JavaPlugin.getDefault().getCombinedPreferenceStore().addPropertyChangeListener(fPropertyChangeListener);

	fReconciledElement= EditorUtility.getEditorInputJavaElement(fTextEditor, false);
}
 

private void gotoSelectedElement() {
	Object selectedElement= getSelectedElement();
	if (selectedElement != null) {
		try {
			dispose();
			IEditorPart part= EditorUtility.openInEditor(selectedElement, true);
			if (part != null && selectedElement instanceof IJavaElement)
				EditorUtility.revealInEditor(part, (IJavaElement) selectedElement);
		} catch (CoreException ex) {
			JavaPlugin.log(ex);
		}
	}
}
 

private static IMarkerResolution[] internalGetResolutions(IMarker marker) {
	if (!internalHasResolutions(marker)) {
		return NO_RESOLUTIONS;
	}

	ICompilationUnit cu= getCompilationUnit(marker);
	if (cu != null) {
		IEditorInput input= EditorUtility.getEditorInput(cu);
		if (input != null) {
			IProblemLocation location= findProblemLocation(input, marker);
			if (location != null) {

				IInvocationContext context= new AssistContext(cu,  location.getOffset(), location.getLength());
				if (!hasProblem (context.getASTRoot().getProblems(), location))
					return NO_RESOLUTIONS;

				ArrayList<IJavaCompletionProposal> proposals= new ArrayList<IJavaCompletionProposal>();
				JavaCorrectionProcessor.collectCorrections(context, new IProblemLocation[] { location }, proposals);
				Collections.sort(proposals, new CompletionProposalComparator());

				int nProposals= proposals.size();
				IMarkerResolution[] resolutions= new IMarkerResolution[nProposals];
				for (int i= 0; i < nProposals; i++) {
					resolutions[i]= new CorrectionMarkerResolution(context.getCompilationUnit(), location.getOffset(), location.getLength(), proposals.get(i), marker);
				}
				return resolutions;
			}
		}
	}
	return NO_RESOLUTIONS;
}