Java tutorial
/******************************************************************************* * Copyright (c) 2013 Red Hat Inc. * 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: * Red Hat Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.linuxtools.internal.perf.ui; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Path; import java.text.MessageFormat; import java.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.eclipse.compare.CompareUI; import org.eclipse.compare.IEncodedStreamContentAccessor; import org.eclipse.compare.ResourceNode; import org.eclipse.compare.structuremergeviewer.Differencer; import org.eclipse.compare.structuremergeviewer.ICompareInput; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.Viewer; import org.eclipse.linuxtools.internal.perf.ReportComparisonData; import org.eclipse.linuxtools.internal.perf.handlers.Messages; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StyleRange; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Color; 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.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; /** * A view part to display perf comparison reports. */ public class ReportComparisonView extends Viewer { // Color values constants private static final Color RED = new Color(Display.getDefault(), 150, 0, 0); private static final Color GREEN = new Color(Display.getDefault(), 0, 50, 0); private static final Color LIGHT_GREEN = new Color(Display.getDefault(), 0, 105, 0); private static final Color ORANGE = new Color(Display.getDefault(), 150, 100, 0); // Regex for a generic entry in a perf comparison report. private static final String DIFF_ENTRY = "\\s+(\\d+(\\.\\d+)?)\\%\\s+([\\+\\-]?\\d+(\\.\\d+)?)\\%.*"; //$NON-NLS-1$ private Composite fComposite; private ICompareInput fInput; // Comparison result. private StyledText result; private Label reverseLabel; private boolean reverse; public ReportComparisonView(Composite parent) { fComposite = new Composite(parent, SWT.NONE); fComposite.setLayout(new GridLayout(2, false)); fComposite.setData(CompareUI.COMPARE_VIEWER_TITLE, Messages.ReportComparisonView_label); reverseLabel = new Label(fComposite, SWT.NONE); reverseLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false)); reverseLabel.setText(Messages.StatComparisonView_reversedLabel); reverseLabel.setVisible(false); final Button reverse = new Button(fComposite, SWT.TOGGLE); reverse.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_ELCL_SYNCED)); reverse.setToolTipText(Messages.StatComparisonView_reverseToolTip); reverse.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false)); reverse.addSelectionListener(new SelectionListener() { @Override public void widgetSelected(SelectionEvent e) { toggleReverse(); setInput(fInput); } @Override public void widgetDefaultSelected(SelectionEvent e) { } }); result = new StyledText(fComposite, SWT.V_SCROLL | SWT.H_SCROLL); result.setAlwaysShowScrollBars(false); GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true); gd.horizontalSpan = 2; result.setLayoutData(gd); result.setEditable(false); } /** * Set properties for StlyedText widget. * @param input String StyledText content. */ private void setStyledText(String input) { result.setText(input); result.setJustify(true); result.setAlignment(SWT.LEFT); result.setFont(JFaceResources.getFont(JFaceResources.TEXT_FONT)); List<StyleRange> styles = new ArrayList<>(); int ptr = 0; String[] lines = input.split("\n"); //$NON-NLS-1$ for (String line : lines) { if (Pattern.matches(DIFF_ENTRY, line)) { Matcher m = Pattern.compile(DIFF_ENTRY).matcher(line); if (m.matches() && m.group(1) != null && m.group(3) != null) { try { float baseline = Float.parseFloat(m.group(1).trim()); float delta = Float.parseFloat(m.group(3).trim()); if (baseline > 1 && Math.abs(delta) > 1) { StyleRange curStyleRange; if (delta < 0) { curStyleRange = delta < -5 ? new StyleRange(ptr, line.length(), LIGHT_GREEN, null) : new StyleRange(ptr, line.length(), GREEN, null); } else { curStyleRange = delta < 5 ? new StyleRange(ptr, line.length(), ORANGE, null) : new StyleRange(ptr, line.length(), RED, null); } styles.add(curStyleRange); } } catch (NumberFormatException e) { // set no StyleRange } } } // + 1 to skip over the '\n' at EOL that the tokenizer eats ptr += line.length() + 1; } result.setStyleRanges(styles.toArray(new StyleRange[0])); } @Override public Control getControl() { return fComposite; } @Override public Object getInput() { return fInput; } @Override public ISelection getSelection() { return null; } @Override public void refresh() { } @Override public void setInput(Object input) { if (input instanceof ICompareInput) { fInput = (ICompareInput) input; if (fInput.getAncestor() != null || (fInput.getKind() & Differencer.DIRECTION_MASK) != 0) { setStyledText(Messages.CompUnsupported); } else { // get corresponding files IPath oldDatum; IPath newDatum; IProject proj = null; if (fInput.getLeft() instanceof ResourceNode) { ResourceNode left = (ResourceNode) fInput.getLeft(); IResource oldData = left.getResource(); oldDatum = oldData.getLocation(); proj = oldData.getProject(); } else { IEncodedStreamContentAccessor lStream = (IEncodedStreamContentAccessor) fInput.getLeft(); oldDatum = generateTempFile(lStream); } if (fInput.getRight() instanceof ResourceNode) { ResourceNode right = (ResourceNode) fInput.getRight(); IResource newData = right.getResource(); newDatum = newData.getLocation(); proj = newData.getProject(); } else { IEncodedStreamContentAccessor rStream = (IEncodedStreamContentAccessor) fInput.getRight(); newDatum = generateTempFile(rStream); } String title = MessageFormat.format(Messages.ContentDescription_0, new Object[] { oldDatum.toFile().getName(), newDatum.toFile().getName() }); // create comparison data and run comparison. ReportComparisonData diffData; if (reverse) { diffData = new ReportComparisonData(title, oldDatum, newDatum, proj); } else { diffData = new ReportComparisonData(title, newDatum, oldDatum, proj); } diffData.parse(); setStyledText(diffData.getPerfData()); } } fComposite.layout(); } @Override public void setSelection(ISelection selection, boolean reveal) { } private IPath generateTempFile(IEncodedStreamContentAccessor stream) { try { Path tmpFile = Files.createTempFile("perf-report-", ".data"); //$NON-NLS-1$ //$NON-NLS-2$ tmpFile.toFile().delete(); Files.copy(stream.getContents(), tmpFile); return new org.eclipse.core.runtime.Path(tmpFile.toString()); } catch (IOException | CoreException e) { return null; } } private void toggleReverse() { if (reverse) { reverse = false; reverseLabel.setVisible(false); } else { reverse = true; reverseLabel.setVisible(true); } } }