/*******************************************************************************
* Copyright (c) 2012 - 2016 VMware, 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:
* VMware, Inc. - initial API and implementation
* DISID Corporation, S.L - Spring Roo maintainer
*******************************************************************************/
package org.springframework.ide.eclipse.roo.ui.internal;
import java.lang.reflect.Field;
import java.util.logging.Level;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.TextStyle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.themes.IThemeManager;
import org.springframework.util.StringUtils;
/**
* Appender implementation that appends text to a given {@link StyledText}
* widget.
* @author Christian Dupuis
* @author Steffen Pingel
* @author Leo Dos Santos
* @author Juan Carlos García
* @since 2.1.0
*/
public class StyledTextAppender {
public static final String NL = System.getProperty("line.separator");
private static final String ROO_PROMPT = "roo> ";
private static final Pattern FILE_PATTERN = Pattern.compile("(.*?)((\\S*\\|+)*(\\bSRC_|\\bROOT|\\bSPRING_CONFIG_ROOT).*/.*\\.\\w*)( .*)?");
// TODO e3.5 replace by SWT.UNDERLINE_LINK
protected static final int SWT_UNDERLINE_LINK = 4;
private final StyledText text;
private boolean messageReceived = false;
private String lastMessage = "";
private static final Object LOCK = new Object();
private boolean hasPresentation = false;
public StyledTextAppender(final StyledText text) {
this.text = text;
}
public boolean hasPrompt() {
synchronized (LOCK) {
String msg = text.getText();
return msg.endsWith(ROO_PROMPT) || msg.endsWith(ROO_PROMPT + NL);
}
}
private void initializePresentation() {
if (RooUiColors.getColorRegistry() != null) {
RooUiColors.getColorRegistry().addListener(PRESENTATION_LISTENER);
}
if (RooUiColors.getFontRegistry() != null) {
RooUiColors.getFontRegistry().addListener(PRESENTATION_LISTENER);
}
text.addDisposeListener(new DisposeListener() {
public void widgetDisposed(DisposeEvent e) {
dispose();
}
});
RooUiColors.applyShellBackground(text);
RooUiColors.applyShellFont(text);
hasPresentation = true;
}
public void dispose() {
if (RooUiColors.getColorRegistry() != null) {
RooUiColors.getColorRegistry().removeListener(PRESENTATION_LISTENER);
}
if (RooUiColors.getFontRegistry() != null) {
RooUiColors.getFontRegistry().removeListener(PRESENTATION_LISTENER);
}
}
public void append(final String message, final Integer level) {
Display.getDefault().asyncExec(new Runnable() {
public void run() {
synchronized (LOCK) {
if (text.isDisposed() || message == null) {
return;
}
// Set initial font and colours and add listener to
// registries - only needs to be done once
if (!hasPresentation) {
initializePresentation();
}
// Clear out the text buffer before first Roo message will
// be presented
if (!messageReceived) {
messageReceived = true;
text.setText("");
}
boolean isPrompt = message.endsWith(ROO_PROMPT + NL);
// Check that we that don't display messages that have just
// been displayed
if (lastMessage.equals(message) && !isPrompt) {
return;
}
String trimmedMessage = message;
if (isPrompt) {
trimmedMessage = message.substring(0, message.length() - NL.length());
// If we previously had a prompt as well add a line
// break to move to next line
if (lastMessage.equals(message)) {
trimmedMessage = NL + trimmedMessage;
}
}
// Remove leading line break
if (trimmedMessage.startsWith(NL) && !lastMessage.endsWith(ROO_PROMPT + NL)) {
trimmedMessage = trimmedMessage.substring(1);
}
// Keep track of last message
lastMessage = message;
text.setRedraw(false);
int startIndex = text.getCharCount();
text.append(trimmedMessage);
int endIndex = text.getCharCount();
// Install hyperlink if message has the appropriate
// structure
Matcher matcher = getHyperlinkPattern().matcher(StringUtils.replace(trimmedMessage, NL, "").replace('\\',
'/'));
// If matches and some file has been created, updated or deleted,
// decorate the new file with Hyperlink style.
if (matcher.matches() && (trimmedMessage.startsWith("Created")
|| trimmedMessage.startsWith("Updated")
|| trimmedMessage.startsWith("Deleted"))) {
String prefix = matcher.group(1);
String file = matcher.group(2);
String appendix = matcher.group(5);
StyleRange style = new StyleRange();
style.start = startIndex;
style.length = prefix.length();
style.foreground = RooUiColors.getColor(level);
text.setStyleRange(style);
StyleRange link = new StyleRange();
link.start = startIndex + prefix.length();
link.length = file.length();
link.underlineColor = null;
link.underlineStyle = SWT_UNDERLINE_LINK;
link.underline = true;
setData(link, file);
text.setStyleRange(link);
if (appendix != null && appendix.length() > 0) {
StyleRange ending = new StyleRange();
ending.start = startIndex + prefix.length() + file.length();
ending.length = appendix.length();
ending.foreground = RooUiColors.getColor(level);
text.setStyleRange(style);
}
}
else {
// Get a different shell coloring for the roo shell
// prompt and path
if (!isPrompt && trimmedMessage.length() > 0) {
StyleRange style = new StyleRange();
style.start = startIndex;
style.length = endIndex - startIndex;
style.foreground = RooUiColors.getColor(level);
text.setStyleRange(style);
}
else {
int length = trimmedMessage.length() - ROO_PROMPT.length();
if (length > 0) {
StyleRange style = new StyleRange();
style.start = startIndex;
style.length = length;
style.foreground = RooUiColors.getColor(Level.WARNING.intValue());
text.setStyleRange(style);
}
StyleRange style = new StyleRange();
style.start = startIndex + length;
style.length = endIndex - (startIndex + length);
style.foreground = RooUiColors.getPromptColor();
text.setStyleRange(style);
}
}
text.setRedraw(true);
text.setTopIndex(text.getLineCount() - 1);
}
}
});
}
public Pattern getHyperlinkPattern() {
return FILE_PATTERN;
}
// TODO e3.5 replace by object.data
public static Object getData(TextStyle style) {
Field field;
try {
field = TextStyle.class.getDeclaredField("data");
if (field != null) {
return field.get(style);
}
}
catch (Exception e) {
// ignore, not supported on Eclipse 3.4
}
return null;
}
// TODO e3.5 replace by object.data
public static void setData(TextStyle style, Object data) {
Field field;
try {
field = TextStyle.class.getDeclaredField("data");
if (field != null) {
field.set(style, data);
}
}
catch (Exception e) {
// ignore, not supported on Eclipse 3.4
}
}
private IPropertyChangeListener PRESENTATION_LISTENER = new IPropertyChangeListener() {
public void propertyChange(PropertyChangeEvent event) {
if (IThemeManager.CHANGE_CURRENT_THEME.equals(event.getProperty())
|| RooUiColors.COLOR_BACKGROUND_SHELL.equals(event.getProperty())) {
RooUiColors.applyShellBackground(text);
}
if (IThemeManager.CHANGE_CURRENT_THEME.equals(event.getProperty())
|| RooUiColors.FONT_SHELL.equals(event.getProperty())) {
RooUiColors.applyShellFont(text);
}
}
};
}