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/*
* Copyright (c) 2013 QNX Software Systems and others.
* 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
*/
package org.eclipse.cdt.qt.internal.core.index;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.index.IIndexMacro;
import org.eclipse.cdt.core.index.IndexFilter;
import org.eclipse.cdt.core.model.CoreModel;
import org.eclipse.cdt.core.model.ICProject;
import org.eclipse.cdt.qt.core.QtPlugin;
import org.eclipse.cdt.qt.core.index.QtIndex;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
public class QtFactory {
private static final char[] QT_VERSION = "QT_VERSION".toCharArray();
public static QtIndex create(IProject project) {
CDTIndex cdtIndex = getCDTIndex(project);
if (cdtIndex == null) {
QtPlugin.log("could not get CDT index from project " + project.getName());
return null;
}
QtVersion qtVersion = cdtIndex.get(QtVersionAccessor);
if (qtVersion == null) {
QtPlugin.log("could not find Qt version in CDT index from project " + project.getName());
return null;
}
if (qtVersion.major == 4 && qtVersion.minor == 8)
return new QtIndexImpl(cdtIndex);
// Qt 4.8 is the default implementation, 5.0 support will need to come soon
return new QtIndexImpl(cdtIndex);
}
private static CDTIndex getCDTIndex(IProject project) {
if (project == null)
return null;
ICProject cProject = CoreModel.getDefault().create(project);
if (cProject == null)
return null;
IIndex index = null;
try {
index = CCorePlugin.getIndexManager().getIndex(cProject);
} catch( CoreException e ) {
QtPlugin.log(e);
return null;
}
return index == null ? null : new CDTIndex(index);
}
/**
* A small wrapper to hold the result of index lookups for the Qt version.
*/
private static class QtVersion {
public final int major;
public final int minor;
@SuppressWarnings("unused")
public final int patch;
// QT_VERSION looks like 0x040805
private static final Pattern Version_regex = Pattern.compile( "0x([a-fA-F\\d]{1,2})([a-fA-F\\d]{2})([a-fA-F\\d]{2})" );
public static QtVersion create(String version) {
Matcher m = Version_regex.matcher(version);
if (!m.matches())
return null;
try {
int major = Integer.parseInt(m.group(1), 16);
int minor = Integer.parseInt(m.group(2), 16);
int patch = Integer.parseInt(m.group(3), 16);
return new QtVersion(major, minor, patch);
} catch(NumberFormatException e) {
QtPlugin.log(e);
}
return null;
}
private QtVersion(int major, int minor, int patch) {
this.major = major;
this.minor = minor;
this.patch = patch;
}
}
private static final CDTIndex.Accessor<QtVersion> QtVersionAccessor = new CDTIndex.Accessor<QtVersion>() {
@Override
public QtVersion access(IIndex index) throws CoreException {
// Multiple macros might be found, sort the values and choose the highest version.
SortedSet<String> versions = new TreeSet<String>();
try {
for(IIndexMacro macro : index.findMacros(QT_VERSION, IndexFilter.ALL, null))
versions.add(new String(macro.getExpansion()).toLowerCase());
} catch( CoreException e ) { }
// don't create the Qt index if there is no Qt information in the CDT index
if (versions.size() <= 0)
return null;
// the highest version has been sorted to the last position
return QtVersion.create(versions.last());
}
};
}
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