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/*******************************************************************************
* Copyright (c) 2009 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 - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.callgraph.core;
import java.util.Vector;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
public class SystemTapTextView extends SystemTapView {
private StyledText viewer;
private Display display;
private int previousEnd;
/**
* Passing the focus request to the viewer's control.
*/
public void setFocus() {
if (viewer != null && !viewer.isDisposed())
viewer.setFocus();
}
public void createViewer(Composite parent) {
viewer = new StyledText(parent, SWT.READ_ONLY | SWT.MULTI
| SWT.V_SCROLL | SWT.WRAP);
viewer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
Font font = new Font(parent.getDisplay(), "Monospace", 11, SWT.NORMAL); //$NON-NLS-1$
viewer.setFont(font);
masterComposite = parent;
display = masterComposite.getDisplay();
}
/**
* Print with colour codes. Colour codes accepted in the form of ~(R,G,B)~,
* and apply for the rest of the line or until another code is encountered
* @param text
*/
public void prettyPrintln(String text) {
Vector<StyleRange> styles = new Vector<StyleRange>();
String[] txt = text.split("\\n"); //$NON-NLS-1$
int lineOffset = 0;
int inLineOffset;
// txt[] contains text, with one entry for each new line
for (int i = 0; i < txt.length; i++) {
// Skip blank strings
if (txt[i].length() == 0) {
viewer.append(PluginConstants.NEW_LINE);
continue;
}
// Search for colour codes, if none exist then continue
String[] split_txt = txt[i].split("~\\("); //$NON-NLS-1$
if (split_txt.length == 1) {
viewer.append(split_txt[0]);
viewer.append(PluginConstants.NEW_LINE);
continue;
}
inLineOffset = 0;
for (int k = 0; k < split_txt.length; k++) {
// Skip blank substrings
if (split_txt[k].length() == 0)
continue;
// Split for the number codes
String[] coloursAndText = split_txt[k].split("\\)~"); //$NON-NLS-1$
// If the string is properly formatted, colours should be length
// 2
// If it is not properly formatted, don't colour (just print)
if (coloursAndText.length != 2) {
for (int j = 0; j < coloursAndText.length; j++) {
viewer.append(coloursAndText[j]);
inLineOffset += coloursAndText[j].length();
}
continue;
}
// The first element in the array should contain the colours
String[] colours = coloursAndText[0].split(","); //$NON-NLS-1$
if (colours.length < 3)
continue;
// The second element in the array should contain the text
viewer.append(coloursAndText[1]);
// Create a colour based on the 3 integers (if there are any
// more integers, just ignore)
int R = new Integer(colours[0].replaceAll(" ", "")).intValue(); //$NON-NLS-1$ //$NON-NLS-2$
int G = new Integer(colours[1].replaceAll(" ", "")).intValue(); //$NON-NLS-1$ //$NON-NLS-2$
int B = new Integer(colours[2].replaceAll(" ", "")).intValue(); //$NON-NLS-1$ //$NON-NLS-2$
if (R > 255) R = 255;
if (G > 255) G = 255;
if (B > 255) B = 255;
if (R < 0) R = 0;
if (G < 0) G = 0;
if (B < 0) B = 0;
Color newColor = new Color(display, R, G, B);
// Find the offset of the current line
lineOffset = viewer.getOffsetAtLine(viewer.getLineCount() - 1);
// Create a new style that lasts no further than the length of
// the line
StyleRange newStyle = new StyleRange(lineOffset + inLineOffset,
coloursAndText[1].length(), newColor, null);
styles.addElement(newStyle);
inLineOffset += coloursAndText[1].length();
}
viewer.append(PluginConstants.NEW_LINE);
}
// Create a new style range
StyleRange[] s = new StyleRange[styles.size()];
styles.copyInto(s);
int cnt = viewer.getCharCount();
// Using replaceStyleRanges with previousEnd, etc, effectively adds
// the StyleRange to the existing set of Style Ranges (so we don't
// waste time fudging with old style ranges that haven't changed)
viewer.replaceStyleRanges(previousEnd, cnt - previousEnd, s);
previousEnd = cnt;
// Change focus and update
viewer.setTopIndex(viewer.getLineCount() - 1);
viewer.update();
}
/**
* Default print, just dumps text into the viewer.
* @param text
*/
public void println(String text) {
if (viewer != null && !viewer.isDisposed()) {
viewer.append(text);
viewer.setTopIndex(viewer.getLineCount() - 1);
viewer.update();
}
}
public void clearAll() {
if (viewer != null && !viewer.isDisposed()) {
previousEnd = 0;
viewer.setText(""); //$NON-NLS-1$
viewer.update();
}
}
/**
* Testing convenience method to see what was printed
*
* @return viewer text
*/
public String getText() {
return viewer.getText();
}
@Override
public IStatus initializeView(Display targetDisplay, IProgressMonitor monitor) {
previousEnd = 0;
viewer.setText(""); //$NON-NLS-1$
viewer.update();
return Status.OK_STATUS;
}
@Override
public void createPartControl(Composite parent) {
createViewer(parent);
addKillButton();
addFileMenu();
addHelpMenu();
ViewFactory.addView(this);
}
@Override
public void updateMethod() {
if (getParser().getData() instanceof String) {
String data = (String) getParser().getData();
if (data.length() > 0)
prettyPrintln((String) getParser().getData());
}
}
@Override
public void setViewID() {
viewID = "org.eclipse.linuxtools.callgraph.core.staptextview"; //$NON-NLS-1$
}
@Override
protected boolean createOpenAction() {
return false;
}
@Override
protected boolean createOpenDefaultAction() {
return false;
}
}
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