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/*******************************************************************************
* Copyright (c) 2018 Remain Software
* 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:
* wim.jongman@remainsoftware.com - initial API and implementation
*******************************************************************************/
package org.eclipse.tips.ide.internal;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.tips.core.TipProvider;
import org.eclipse.tips.core.internal.TipManager;
import org.eclipse.ui.IStartup;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.progress.UIJob;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkUtil;
/**
* Early startup to run the TipManager in the IDE.
*
*/
@SuppressWarnings("restriction")
public class Startup implements IStartup {
private static final String DBLQUOTE = "\""; //$NON-NLS-1$
private static final String EQ = "="; //$NON-NLS-1$
private static final String SLASH = "/"; //$NON-NLS-1$
private static final String LT = "<"; //$NON-NLS-1$
private static final String EMPTY = ""; //$NON-NLS-1$
private static final String GT = ">"; //$NON-NLS-1$
private static final String SPACE = " "; //$NON-NLS-1$
@Override
public void earlyStartup() {
if (!(TipsPreferences.getStartupBehavior() == TipManager.START_DISABLE)) {
start();
}
}
public void start() {
loadProviders();
openManager();
}
public static void loadProviders() {
IConfigurationElement[] elements = Platform.getExtensionRegistry()
.getConfigurationElementsFor("org.eclipse.tips.core.tips"); //$NON-NLS-1$
for (IConfigurationElement element : elements) {
if (element.getName().equals("provider")) { //$NON-NLS-1$
try {
TipProvider provider = (TipProvider) element.createExecutableExtension("class"); //$NON-NLS-1$
provider.setExpression(getExpression(element));
IDETipManager.getInstance().register(provider);
} catch (CoreException e) {
log(e);
}
}
}
}
/**
* @return the core expression
*/
private static String getExpression(IConfigurationElement element) {
IConfigurationElement[] enablements = element.getChildren("enablement"); //$NON-NLS-1$
if (enablements.length == 0) {
return null;
}
IConfigurationElement enablement = enablements[0];
String result = getXML(enablement.getChildren());
return result;
}
private static String getXML(IConfigurationElement[] children) {
String result = EMPTY;
for (IConfigurationElement element : children) {
IConfigurationElement[] myChildren = element.getChildren();
result += LT + element.getName() + SPACE + getXMLAttributes(element) + GT;
if (myChildren.length > 0) {
result += getXML(myChildren);
} else {
String value = element.getValue();
result += value == null ? EMPTY : value;
}
result += LT + SLASH + element.getName() + GT;
}
return result;
}
private static String getXMLAttributes(IConfigurationElement element) {
String result = EMPTY;
for (String name : element.getAttributeNames()) {
result += name;
result += EQ + DBLQUOTE;
result += element.getAttribute(name);
result += DBLQUOTE + SPACE;
}
return result;
}
private static void openManager() {
if (IDETipManager.getInstance().hasContent()) {
getOpenUIJob().schedule();
} else {
getWaitJob().schedule();
}
}
private static Job getWaitJob() {
Job waitJob = new Job(Messages.Startup_18) {
@Override
protected IStatus run(IProgressMonitor pMonitor) {
int attempts = 3;
SubMonitor monitor = SubMonitor.convert(pMonitor, attempts);
for (int i = 0; i < attempts; i++) {
monitor.setTaskName(Messages.Startup_19 + i);
if (openOrSleep(monitor)) {
if (monitor.isCanceled()) {
return Status.CANCEL_STATUS;
} else {
monitor.done();
return Status.OK_STATUS;
}
}
monitor.worked(1);
}
monitor.done();
return Status.OK_STATUS;
}
private boolean openOrSleep(SubMonitor pMonitor) {
if (IDETipManager.getInstance().hasContent()) {
getOpenUIJob().schedule();
return true;
}
if (sleep(1000)) {
pMonitor.setCanceled(true);
return true;
}
return false;
}
private boolean sleep(int millis) {
try {
Thread.sleep(millis);
return false;
} catch (InterruptedException e) {
return true;
}
}
};
waitJob.setSystem(true);
return waitJob;
}
private static UIJob getOpenUIJob() {
UIJob uiJob = new UIJob(PlatformUI.getWorkbench().getDisplay(), Messages.Startup_20) {
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
IDETipManager.getInstance().open(true);
return Status.OK_STATUS;
}
};
return uiJob;
}
private static void log(CoreException e) {
Bundle bundle = FrameworkUtil.getBundle(Startup.class);
Status status = new Status(IStatus.ERROR, bundle.getSymbolicName(), e.getMessage(), e);
Platform.getLog(bundle).log(status);
}
}
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