Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2010 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.cdt.ui.actions; import java.util.Iterator; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IStorage; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.text.ITextSelection; import org.eclipse.jface.util.OpenStrategy; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.osgi.util.NLS; import org.eclipse.ui.IWorkbenchSite; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.texteditor.IEditorStatusLine; import org.eclipse.cdt.core.model.CModelException; import org.eclipse.cdt.core.model.ICElement; import org.eclipse.cdt.core.model.ISourceReference; import org.eclipse.cdt.ui.CUIPlugin; import org.eclipse.cdt.internal.ui.ICHelpContextIds; import org.eclipse.cdt.internal.ui.ICStatusConstants; import org.eclipse.cdt.internal.ui.actions.ActionMessages; import org.eclipse.cdt.internal.ui.actions.ActionUtil; import org.eclipse.cdt.internal.ui.actions.OpenActionUtil; import org.eclipse.cdt.internal.ui.actions.SelectionConverter; import org.eclipse.cdt.internal.ui.editor.CEditor; import org.eclipse.cdt.internal.ui.util.ExceptionHandler; /** * This action opens a Java editor on a Java element or file. * <p> * The action is applicable to selections containing elements of * type <code>ICompilationUnit</code>, <code>IMember</code> * or <code>IFile</code>. * * <p> * This class may be instantiated; it is not intended to be subclassed. * </p> * * @since 2.0 */ public class OpenAction extends SelectionDispatchAction { private CEditor fEditor; /** * Creates a new <code>OpenAction</code>. The action requires * that the selection provided by the site's selection provider is of type <code> * org.eclipse.jface.viewers.IStructuredSelection</code>. * * @param site the site providing context information for this action */ public OpenAction(IWorkbenchSite site) { super(site); setText(ActionMessages.OpenAction_label); setToolTipText(ActionMessages.OpenAction_tooltip); setDescription(ActionMessages.OpenAction_description); PlatformUI.getWorkbench().getHelpSystem().setHelp(this, ICHelpContextIds.OPEN_ACTION); } /** * Note: This constructor is for internal use only. Clients should not call this constructor. * * @noreference This constructor is not intended to be referenced by clients. */ public OpenAction(CEditor editor) { this(editor.getEditorSite()); fEditor = editor; setText(ActionMessages.OpenAction_declaration_label); setEnabled(SelectionConverter.canOperateOn(fEditor)); } /* (non-Javadoc) * Method declared on SelectionDispatchAction. */ @Override public void selectionChanged(ITextSelection selection) { } /* (non-Javadoc) * Method declared on SelectionDispatchAction. */ @Override public void selectionChanged(IStructuredSelection selection) { setEnabled(checkEnabled(selection)); } private boolean checkEnabled(IStructuredSelection selection) { if (selection.isEmpty()) return false; for (Iterator<?> iter = selection.iterator(); iter.hasNext();) { Object element = iter.next(); if (element instanceof ISourceReference) continue; if (element instanceof IFile) continue; if (element instanceof IStorage) continue; return false; } return true; } /* (non-Javadoc) * Method declared on SelectionDispatchAction. */ @Override public void run(ITextSelection selection) { if (!ActionUtil.isProcessable(fEditor)) return; try { ICElement element = SelectionConverter.codeResolve(fEditor, getShell(), getDialogTitle(), ActionMessages.OpenAction_select_element); if (element == null) { IEditorStatusLine statusLine = (IEditorStatusLine) fEditor.getAdapter(IEditorStatusLine.class); if (statusLine != null) statusLine.setMessage(true, ActionMessages.OpenAction_error_messageBadSelection, null); getShell().getDisplay().beep(); return; } ICElement input = SelectionConverter.getInput(fEditor); int type = element.getElementType(); if (type == ICElement.C_PROJECT || type == ICElement.C_CCONTAINER) element = input; run(new Object[] { element }); } catch (CModelException e) { showError(e); } } /* (non-Javadoc) * Method declared on SelectionDispatchAction. */ @Override public void run(IStructuredSelection selection) { if (!checkEnabled(selection)) return; run(selection.toArray()); } /** * Note: this method is for internal use only. Clients should not call this method. */ public void run(Object[] elements) { if (elements == null) return; for (Object element : elements) { try { element = getElementToOpen(element); boolean activateOnOpen = fEditor != null ? true : OpenStrategy.activateOnOpen(); OpenActionUtil.open(element, activateOnOpen); } catch (CModelException e) { CUIPlugin.log(new Status(IStatus.ERROR, CUIPlugin.getPluginId(), ICStatusConstants.INTERNAL_ERROR, ActionMessages.OpenAction_error_message, e)); ErrorDialog.openError(getShell(), getDialogTitle(), ActionMessages.OpenAction_error_messageProblems, e.getStatus()); } catch (PartInitException x) { String name = null; if (element instanceof ICElement) { name = ((ICElement) element).getElementName(); } else if (element instanceof IStorage) { name = ((IStorage) element).getName(); } else if (element instanceof IResource) { name = ((IResource) element).getName(); } if (name != null) { MessageDialog.openError(getShell(), ActionMessages.OpenAction_error_messageProblems, NLS.bind(ActionMessages.OpenAction_error_messageArgs, name, x.getMessage())); } } } } /** * Note: this method is for internal use only. Clients should not call this method. */ public Object getElementToOpen(Object object) throws CModelException { return object; } private String getDialogTitle() { return ActionMessages.OpenAction_error_title; } private void showError(CoreException e) { ExceptionHandler.handle(e, getShell(), getDialogTitle(), ActionMessages.OpenAction_error_message); } }