Java tutorial
/* * Copyright (C) 2007 SQL Explorer Development Team * http://sourceforge.net/projects/eclipsesql * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package com.safi.workshop.sqlexplorer.sqleditor; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferenceConverter; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.DefaultInformationControl; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IDocumentPartitioner; import org.eclipse.jface.text.IInformationControl; import org.eclipse.jface.text.IInformationControlCreator; import org.eclipse.jface.text.IRegion; import org.eclipse.jface.text.ITextHover; import org.eclipse.jface.text.ITextViewer; import org.eclipse.jface.text.Region; import org.eclipse.jface.text.TextViewerUndoManager; import org.eclipse.jface.text.contentassist.IContentAssistant; import org.eclipse.jface.text.presentation.IPresentationReconciler; import org.eclipse.jface.text.source.IAnnotationHover; import org.eclipse.jface.text.source.IAnnotationModel; import org.eclipse.jface.text.source.ISourceViewer; import org.eclipse.jface.text.source.IVerticalRuler; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.jface.text.source.VerticalRuler; import org.eclipse.jface.util.IPropertyChangeListener; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import com.safi.workshop.sqlexplorer.IConstants; import com.safi.workshop.sqlexplorer.sessiontree.model.utility.Dictionary; public class SQLTextViewer extends SourceViewer { private class PreferenceListener implements IPropertyChangeListener { public void propertyChange(PropertyChangeEvent event) { adaptToPreferenceChange(event); } }; PreferenceListener fPreferenceListener = new PreferenceListener(); IPresentationReconciler fPresentationReconciler; private IDocumentPartitioner partitioner; SQLTextTools sqlTextTools; IPreferenceStore store; IContentAssistant contentAssistant; public Dictionary dictionary; SQLSourceViewerConfiguration configuration; TextViewerUndoManager undoManager = new TextViewerUndoManager(50); public SQLTextViewer(Composite parent, int style, IPreferenceStore store, final Dictionary dictionary) { this(parent, style, store, dictionary, new VerticalRuler(0)); } public SQLTextViewer(Composite parent, int style, IPreferenceStore store, final Dictionary dictionary, IVerticalRuler ruler) { super(parent, ruler, style); this.store = store; this.dictionary = dictionary; sqlTextTools = new SQLTextTools(store, dictionary); this.getControl().addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent event) { sqlTextTools.dispose(); fPresentationReconciler.uninstall(); } }); store.addPropertyChangeListener(fPreferenceListener); configuration = new SQLSourceViewerConfiguration(sqlTextTools); fPresentationReconciler = configuration.getPresentationReconciler(null); if (dictionary != null) { contentAssistant = configuration.getContentAssistant(null); if (contentAssistant != null) { contentAssistant.install(this); } } if (fPresentationReconciler != null) fPresentationReconciler.install(this); partitioner = configuration.getDocumentPartitioner(); parent.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent event) { if (dictionary != null) { if (contentAssistant != null) { try { contentAssistant.uninstall(); } catch (Exception e) { e.printStackTrace(); } } } } }); fInformationPresenter = configuration.getInformationPresenter(this); if (fInformationPresenter != null) fInformationPresenter.install(this); this.setAnnotationHover(new IAnnotationHover() { public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) { return "hover info"; } }); setHoverControlCreator(new IInformationControlCreator() { public IInformationControl createInformationControl(Shell parent) { return new DefaultInformationControl(parent); } }); String[] contentTypes = { IDocument.DEFAULT_CONTENT_TYPE, IConstants.SQL_COLOR_SINGLE_LINE_COMMENT, IConstants.SQL_COLOR_STRING, IConstants.SQL_COLOR_MULTILINE_COMMENT }; for (String contentType : contentTypes) { super.setTextHover(new ITextHover() { public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { // return ""; } public IRegion getHoverRegion(ITextViewer textViewer, int offset) { return new Region(offset, 1); } }, contentType); } super.activatePlugins(); } @Override public void setDocument(IDocument dc) { IDocument previous = this.getDocument(); if (previous == dc) { return; } if (previous != null) { partitioner.disconnect(); } super.setDocument(dc); if (dc != null) { partitioner.connect(dc); dc.setDocumentPartitioner(partitioner); undoManager.connect(this); this.setUndoManager(undoManager); } } /* * (non-Javadoc) * * @see * org.eclipse.jface.text.source.ISourceViewer#setDocument(org.eclipse.jface.text.IDocument * , org.eclipse.jface.text.source.IAnnotationModel) */ @Override public void setDocument(IDocument document, IAnnotationModel annotationModel) { setDocument(document); if (annotationModel != null && document != null) annotationModel.connect(document); } public void setNewDictionary(Dictionary newDictionary) { dictionary = newDictionary; if (contentAssistant != null) { contentAssistant.uninstall(); contentAssistant = null; } sqlTextTools = new SQLTextTools(store, dictionary); configuration = new SQLSourceViewerConfiguration(sqlTextTools); fPresentationReconciler = configuration.getPresentationReconciler(null); if (fPresentationReconciler != null) { fPresentationReconciler.install(this); } if (dictionary != null) { contentAssistant = configuration.getContentAssistant(null); if (contentAssistant != null) { contentAssistant.install(this); } } } void adaptToPreferenceChange(PropertyChangeEvent event) { if (event.getProperty().equals(IConstants.FONT)) { FontData[] fData = PreferenceConverter.getFontDataArray(store, IConstants.FONT); String des = store.getString(IConstants.FONT); JFaceResources.getFontRegistry().put(des, fData); Control ctrl = this.getControl(); if (ctrl != null) { getTextWidget().setFont(JFaceResources.getFontRegistry().get(des)); } } } public void showAssistance() { if (dictionary != null) contentAssistant.showPossibleCompletions(); } /** * */ public void clearText() { getTextWidget().setText(""); } /** * */ public void insertText(String pText) { Point selection = getTextWidget().getSelectionRange(); try { getDocument().replace(selection.x, selection.y, pText); getTextWidget().setSelection(selection.x + pText.length()); getTextWidget().setFocus(); } catch (BadLocationException ignored) { } } }