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/*******************************************************************************
* Copyright (c) 2013 Intel Corporation.
* 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:
* Intel - initial API and implementation
*******************************************************************************/
package org.yocto.bc.ui.editors.bitbake;
import java.net.URI;
import java.util.Map;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
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.yocto.bc.bitbake.BBRecipe;
import org.yocto.bc.bitbake.BBSession;
import org.yocto.bc.ui.Activator;
/**
* Maps BB Variables in the editor to BBSession
* @author kgilmer
*
*/
class BBVariableTextHover implements ITextHover {
private final BBSession session;
private volatile Map<String, String> envMap;
public BBVariableTextHover(BBSession session, URI file) {
this.session = session;
envMap = getEnvironmentMap();
LoadRecipeJob loadRecipeJob = new LoadRecipeJob(getFilename(file), file);
loadRecipeJob.schedule();
}
private Map<String, String> getEnvironmentMap() {
if (envMap == null)
envMap = this.session.getProperties();
return envMap;
}
private String getFilename(URI uri) {
return uri.getPath();
}
public IRegion getHoverRegion(ITextViewer tv, int off) {
return new Region(off, 0);
}
public String getHoverInfo(ITextViewer tv, IRegion r) {
try {
IRegion lineRegion = tv.getDocument().getLineInformationOfOffset(r.getOffset());
return getBBVariable(tv.getDocument().get(lineRegion.getOffset(), lineRegion.getLength()).toCharArray(), r.getOffset() - lineRegion.getOffset());
} catch (Exception e) {
return "";
}
}
private String getBBVariable(char[] line, int offset) {
// Find start of word.
int i = offset;
while (line[i] != ' ' && line[i] != '$' && i > 0) {
i--;
}
if (i < 0 || line[i] != '$') {
return ""; //this is not a BB variable.
}
// find end of word
int start = i;
i = offset;
while (line[i] != ' ' && line[i] != '}' && i <= line.length) {
i++;
}
if (line[i] != '}') {
return ""; //this bb variable didn't terminate as expected
}
String key = new String(line, start + 2, i - start - 2);
String val = (String) getEnvironmentMap().get(key);
if (val == null) {
val = "";
}
if (val.length() > 64) {
val = val.substring(0, 64) + '\n' + val.substring(65);
}
return val;
}
private class LoadRecipeJob extends Job {
private final URI filePath;
public LoadRecipeJob(String name, URI filePath) {
super("Extracting BitBake environment for " + name);
this.filePath = filePath;
}
@Override
protected IStatus run(IProgressMonitor mon) {
try {
BBRecipe recipe = Activator.getBBRecipe(session, filePath);
recipe.initialize();
envMap = recipe;
} catch (Exception e) {
return new Status(IStatus.WARNING, Activator.PLUGIN_ID, "Unable to load session for " + filePath, e);
}
return Status.OK_STATUS;
}
}
}
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