/*******************************************************************************
* Copyright (c) 2000, 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.ui.examples.multipageeditor;
import java.io.StringWriter;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.StringTokenizer;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.FillLayout;
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.FontDialog;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.editors.text.TextEditor;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.ide.IGotoMarker;
import org.eclipse.ui.part.MultiPageEditorPart;
/**
* An example showing how to create a multi-page editor.
* This example has 3 pages:
* <ul>
* <li>page 0 contains a nested text editor.
* <li>page 1 allows you to change the font used in page 2
* <li>page 2 shows the words in page 0 in sorted order
* </ul>
*/
public class MultiPageEditorExample extends MultiPageEditorPart implements
IGotoMarker {
/** The text editor used in page 0. */
private TextEditor editor;
/** The index of the page containing the text editor */
private int editorIndex = 0;
/** The font chosen in page 1. */
private Font font;
/** The text widget used in page 2. */
private StyledText text;
/**
* Creates a multi-page editor example.
*/
public MultiPageEditorExample() {
super();
}
/**
* Creates page 0 of the multi-page editor,
* which contains a text editor.
*/
void createPage0() {
try {
editor = new TextEditor();
editorIndex = addPage(editor, getEditorInput());
setPageText(editorIndex, MessageUtil.getString("Source")); //$NON-NLS-1$
} catch (PartInitException e) {
ErrorDialog
.openError(
getSite().getShell(),
MessageUtil.getString("ErrorCreatingNestedEditor"), null, e.getStatus()); //$NON-NLS-1$
}
}
/**
* Creates page 1 of the multi-page editor,
* which allows you to change the font used in page 2.
*/
void createPage1() {
Composite composite = new Composite(getContainer(), SWT.NONE);
GridLayout layout = new GridLayout();
composite.setLayout(layout);
layout.numColumns = 2;
Button fontButton = new Button(composite, SWT.NONE);
GridData gd = new GridData(GridData.BEGINNING);
gd.horizontalSpan = 2;
fontButton.setLayoutData(gd);
fontButton.setText(MessageUtil.getString("ChangeFont")); //$NON-NLS-1$
fontButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent event) {
setFont();
}
});
int index = addPage(composite);
setPageText(index, MessageUtil.getString("Properties")); //$NON-NLS-1$
}
/**
* Creates page 2 of the multi-page editor,
* which shows the sorted text.
*/
void createPage2() {
Composite composite = new Composite(getContainer(), SWT.NONE);
FillLayout layout = new FillLayout();
composite.setLayout(layout);
text = new StyledText(composite, SWT.H_SCROLL | SWT.V_SCROLL);
text.setEditable(false);
int index = addPage(composite);
setPageText(index, MessageUtil.getString("Preview")); //$NON-NLS-1$
}
/**
* Creates the pages of the multi-page editor.
*/
@Override
protected void createPages() {
createPage0();
createPage1();
createPage2();
}
/**
* Saves the multi-page editor's document.
*/
@Override
public void doSave(IProgressMonitor monitor) {
getEditor(0).doSave(monitor);
}
/**
* Saves the multi-page editor's document as another file.
* Also updates the text for page 0's tab, and updates this multi-page editor's input
* to correspond to the nested editor's.
*/
@Override
public void doSaveAs() {
IEditorPart editor = getEditor(0);
editor.doSaveAs();
setPageText(0, editor.getTitle());
setInput(editor.getEditorInput());
}
/**
* The <code>MultiPageEditorExample</code> implementation of this method
* checks that the input is an instance of <code>IFileEditorInput</code>.
*/
@Override
public void init(IEditorSite site, IEditorInput editorInput)
throws PartInitException {
if (!(editorInput instanceof IFileEditorInput))
throw new PartInitException(MessageUtil.getString("InvalidInput")); //$NON-NLS-1$
super.init(site, editorInput);
}
@Override
public boolean isSaveAsAllowed() {
return true;
}
/**
* Calculates the contents of page 2 when the it is activated.
*/
@Override
protected void pageChange(int newPageIndex) {
super.pageChange(newPageIndex);
if (newPageIndex == 2) {
sortWords();
}
}
/**
* Sets the font related data to be applied to the text in page 2.
*/
void setFont() {
FontDialog fontDialog = new FontDialog(getSite().getShell());
fontDialog.setFontList(text.getFont().getFontData());
FontData fontData = fontDialog.open();
if (fontData != null) {
if (font != null)
font.dispose();
font = new Font(text.getDisplay(), fontData);
text.setFont(font);
}
}
/**
* Sorts the words in page 0, and shows them in page 2.
*/
void sortWords() {
String editorText = editor.getDocumentProvider().getDocument(
editor.getEditorInput()).get();
StringTokenizer tokenizer = new StringTokenizer(editorText,
" \t\n\r\f!@#$%^&*()-_=+`~[]{};:'\",.<>/?|\\"); //$NON-NLS-1$
List<String> editorWords = new ArrayList<>();
while (tokenizer.hasMoreTokens()) {
editorWords.add(tokenizer.nextToken());
}
Collections.sort(editorWords, Collator.getInstance());
StringWriter displayText = new StringWriter();
for (int i = 0; i < editorWords.size(); i++) {
displayText.write((editorWords.get(i)));
displayText.write("\n"); //$NON-NLS-1$
}
text.setText(displayText.toString());
}
@Override
public void gotoMarker(IMarker marker) {
setActivePage(editorIndex);
IDE.gotoMarker(editor, marker);
}
}