Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2006 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.jst.jsp.ui.tests.viewer; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IContributionManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.window.Window; import org.eclipse.jst.jsp.core.internal.provisional.contenttype.ContentTypeIdForJSP; import org.eclipse.jst.jsp.ui.StructuredTextViewerConfigurationJSP; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IMemento; import org.eclipse.ui.IViewSite; import org.eclipse.ui.PartInitException; import org.eclipse.ui.part.ViewPart; import org.eclipse.ui.texteditor.ITextEditor; import org.eclipse.ui.views.contentoutline.IContentOutlinePage; import org.eclipse.wst.sse.core.StructuredModelManager; import org.eclipse.wst.sse.core.internal.provisional.IModelManager; import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; import org.eclipse.wst.sse.ui.StructuredTextEditor; import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration; import org.eclipse.wst.sse.ui.internal.StructuredTextViewer; import org.w3c.dom.Attr; public class ViewerTestJSP extends ViewPart { private final String SSE_EDITOR_FONT = "org.eclipse.wst.sse.ui.textfont"; private final String DEFAULT_VIEWER_CONTENTS = "<%@ page contentType=\"text/html; charset=ISO-8859-1\" %>\n"; StructuredTextViewer fSourceViewer = null; private StructuredTextViewerConfiguration fConfig = null; private IContentOutlinePage fContentOutlinePage = null; private ISelectionChangedListener fHighlightRangeListener = null; /** * Sets the viewer's highlighting text range to the text range indicated * by the selected Nodes. */ protected class NodeRangeSelectionListener implements ISelectionChangedListener { public void selectionChanged(SelectionChangedEvent event) { if (!event.getSelection().isEmpty() && event.getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); IndexedRegion startNode = (IndexedRegion) selection.getFirstElement(); IndexedRegion endNode = (IndexedRegion) selection.toArray()[selection.size() - 1]; if (startNode instanceof Attr) startNode = (IndexedRegion) ((Attr) startNode).getOwnerElement(); if (endNode instanceof Attr) endNode = (IndexedRegion) ((Attr) endNode).getOwnerElement(); int start = startNode.getStartOffset(); int end = endNode.getEndOffset(); fSourceViewer.resetVisibleRegion(); fSourceViewer.setVisibleRegion(start, end - start); fSourceViewer.setSelectedRange(start, 0); } else { fSourceViewer.resetVisibleRegion(); } } } protected class NumberInputDialog extends Dialog { public NumberInputDialog(Shell shell) { super(shell); } public Text start; int startValue; public Text length; int lengthValue; protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); Composite container = new Composite(composite, SWT.NULL); container.setLayoutData(new GridData(GridData.FILL_BOTH)); container.setLayout(new GridLayout(2, true)); setShellStyle(getShell().getStyle() | SWT.RESIZE); Label label = new Label(container, SWT.NULL); label.setText("Start"); label.setLayoutData(new GridData(GridData.FILL_BOTH)); label = new Label(container, SWT.NULL); label.setText("Length"); label.setLayoutData(new GridData(GridData.FILL_BOTH)); start = new Text(container, SWT.BORDER); startValue = fSourceViewer.getVisibleRegion().getOffset(); start.setText("" + startValue); start.setLayoutData(new GridData(GridData.FILL_BOTH)); length = new Text(container, SWT.BORDER); lengthValue = fSourceViewer.getVisibleRegion().getLength(); length.setText("" + lengthValue); length.setLayoutData(new GridData(GridData.FILL_BOTH)); // start.addModifyListener(new ModifyListener() { // public void modifyText(ModifyEvent e) { // if (e.widget == start) { // try { // startValue = Integer.decode(start.getText()).intValue(); // } // catch (NumberFormatException e2) { // startValue = 0; // } // } // } // }); // length.addModifyListener(new ModifyListener() { // public void modifyText(ModifyEvent e) { // if (e.widget == length) { // try { // lengthValue = Integer.decode(length.getText()).intValue(); // } // catch (NumberFormatException e2) { // lengthValue = 0; // } // } // } // }); return composite; } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.Dialog#okPressed() */ protected void okPressed() { try { startValue = Integer.decode(start.getText()).intValue(); } catch (NumberFormatException e2) { startValue = 0; } try { lengthValue = Integer.decode(length.getText()).intValue(); } catch (NumberFormatException e2) { lengthValue = 0; } super.okPressed(); } } protected void addActions(IContributionManager mgr) { if (mgr != null) { mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "New JSP"; } public void run() { super.run(); BusyIndicator.showWhile(getSite().getShell().getDisplay(), new Runnable() { public void run() { setupViewerForNew(); fSourceViewer.setEditable(true); } }); } }); mgr.add(new Separator()); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Change Visibility"; } public void run() { super.run(); NumberInputDialog dlg = new NumberInputDialog(fSourceViewer.getControl().getShell()); int proceed = dlg.open(); if (proceed == Window.CANCEL) return; fSourceViewer.resetVisibleRegion(); fSourceViewer.setVisibleRegion(dlg.startValue, dlg.lengthValue); } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Show All"; } public void run() { super.run(); fSourceViewer.resetVisibleRegion(); } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Change Visibility in Editor"; } public void run() { super.run(); StructuredTextViewer sourceViewer = null; IEditorPart part = getViewSite().getWorkbenchWindow().getActivePage().getActiveEditor(); if (part != null && part instanceof StructuredTextEditor) { sourceViewer = ((StructuredTextEditor) part).getTextViewer(); } if (sourceViewer != null) { NumberInputDialog dlg = new NumberInputDialog(sourceViewer.getControl().getShell()); int proceed = dlg.open(); if (proceed == Window.CANCEL) return; sourceViewer.resetVisibleRegion(); sourceViewer.setVisibleRegion(dlg.startValue, dlg.lengthValue); } } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Show All in Editor"; } public void run() { super.run(); StructuredTextViewer sourceViewer = null; IEditorPart part = getViewSite().getWorkbenchWindow().getActivePage().getActiveEditor(); if (part != null && part instanceof StructuredTextEditor) { sourceViewer = ((StructuredTextEditor) part).getTextViewer(); } if (sourceViewer != null) { sourceViewer.resetVisibleRegion(); } } }); mgr.add(new Separator()); // no longer able to set input to NULL // mgr.add(new Action() { // public String getText() { // return getToolTipText(); // } // // public String getToolTipText() { // return "Set Input to NULL"; // } // public void run() { // super.run(); // viewer.setInput(null); // } // }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Take Input from Active Editor"; } public void run() { super.run(); ITextEditor textEditor = getActiveEditor(); if (textEditor != null) { setupViewerForEditor(textEditor); fSourceViewer.setEditable(true); } } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Take Input and Follow Selection"; } public void run() { super.run(); followSelection(); fSourceViewer.setEditable(true); } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Take Input and Follow Selection As ReadOnly"; } public void run() { super.run(); followSelection(); fSourceViewer.setEditable(false); } }); mgr.add(new Action() { public String getText() { return getToolTipText(); } public String getToolTipText() { return "Stop Following Selection"; } public void run() { super.run(); stopFollowSelection(); } }); } } /** * @see org.eclipse.ui.IWorkbenchPart#createPartControl(Composite) */ public void createPartControl(Composite parent) { IContributionManager mgr = getViewSite().getActionBars().getMenuManager(); addActions(mgr); // create source viewer & its content type-specific viewer // configuration fSourceViewer = new StructuredTextViewer(parent, null, null, false, SWT.NONE); fConfig = new StructuredTextViewerConfigurationJSP(); // set up the viewer with a document & viewer config setupViewerForNew(); setupViewerPreferences(); } /** * @see org.eclipse.ui.IWorkbenchPart#dispose() */ public void dispose() { stopFollowSelection(); fSourceViewer.unconfigure(); } /** * @see org.eclipse.ui.IWorkbenchPart#setFocus() */ public void setFocus() { if (fSourceViewer.getControl() != null && !fSourceViewer.getControl().isDisposed()) fSourceViewer.getControl().setFocus(); } /** * @see org.eclipse.ui.IViewPart#init(IViewSite, IMemento) */ public void init(IViewSite site, IMemento memento) throws PartInitException { super.init(site, memento); } /** * Set up source viewer with any additional preferences it should have Ex: * font, tab width */ private void setupViewerPreferences() { fSourceViewer.getTextWidget().setFont(JFaceResources.getFont(SSE_EDITOR_FONT)); } /** * Set up source viewer with a new document & configure it */ private void setupViewerForNew() { stopFollowSelection(); // if was following selection, stop IModelManager modelManager = StructuredModelManager.getModelManager(); IDocument doc = modelManager.createStructuredDocumentFor(ContentTypeIdForJSP.ContentTypeID_JSP); doc.set(DEFAULT_VIEWER_CONTENTS); fSourceViewer.setDocument(doc); // need to reconfigure after set document just so highlighter works fSourceViewer.configure(fConfig); } /** * Returns the current active text editor if possible * * @return ITextEditor */ private ITextEditor getActiveEditor() { ITextEditor editor = null; IEditorPart editorPart = getSite().getWorkbenchWindow().getActivePage().getActiveEditor(); if (editorPart instanceof ITextEditor) editor = (ITextEditor) editorPart; if (editor == null && editorPart != null) editor = (ITextEditor) editorPart.getAdapter(ITextEditor.class); return editor; } /** * Sets up the viewer with the same document/input as the given editor * * @param ITextEditor * editor - the editor to use *cannot to be null* */ private void setupViewerForEditor(ITextEditor editor) { stopFollowSelection(); // if was following selection, stop IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput()); fSourceViewer.setDocument(doc); // need to reconfigure after set document just so highlighter works fSourceViewer.configure(new StructuredTextViewerConfigurationJSP()); } /** * Hooks up the viewer to follow the selection made in the active editor */ private void followSelection() { ITextEditor editor = getActiveEditor(); if (editor != null) { setupViewerForEditor(editor); if (fHighlightRangeListener == null) fHighlightRangeListener = new NodeRangeSelectionListener(); fContentOutlinePage = ((IContentOutlinePage) editor.getAdapter(IContentOutlinePage.class)); if (fContentOutlinePage != null) { fContentOutlinePage.addSelectionChangedListener(fHighlightRangeListener); if (!fContentOutlinePage.getSelection().isEmpty() && fContentOutlinePage.getSelection() instanceof IStructuredSelection) { fSourceViewer.resetVisibleRegion(); Object[] nodes = ((IStructuredSelection) fContentOutlinePage.getSelection()).toArray(); IndexedRegion startNode = (IndexedRegion) nodes[0]; IndexedRegion endNode = (IndexedRegion) nodes[nodes.length - 1]; if (startNode instanceof Attr) startNode = (IndexedRegion) ((Attr) startNode).getOwnerElement(); if (endNode instanceof Attr) endNode = (IndexedRegion) ((Attr) endNode).getOwnerElement(); int start = startNode.getStartOffset(); int end = endNode.getEndOffset(); fSourceViewer.setVisibleRegion(start, end - start); fSourceViewer.setSelectedRange(start, 0); } } } } /** * Cease following the selection made in the editor */ private void stopFollowSelection() { if (fContentOutlinePage != null) { fContentOutlinePage.removeSelectionChangedListener(fHighlightRangeListener); fSourceViewer.resetVisibleRegion(); fContentOutlinePage = null; } } }