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/*******************************************************************************
* Copyright (c) 2005, 2008 Intel Corporation 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
*
* Contributors:
* Intel Corporation - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.cdtvariables;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Pattern;
import org.eclipse.cdt.core.cdtvariables.CdtVariable;
import org.eclipse.cdt.core.cdtvariables.CdtVariableException;
import org.eclipse.cdt.core.cdtvariables.ICdtVariable;
import org.eclipse.cdt.core.cdtvariables.ICdtVariableStatus;
import org.eclipse.cdt.utils.cdtvariables.ICdtVariableSupplier;
import org.eclipse.cdt.utils.cdtvariables.IVariableContextInfo;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.variables.IDynamicVariable;
import org.eclipse.core.variables.IStringVariable;
import org.eclipse.core.variables.IStringVariableManager;
import org.eclipse.core.variables.IValueVariable;
import org.eclipse.core.variables.VariablesPlugin;
import org.eclipse.osgi.util.NLS;
/**
* This supplier suplies the macros that represent the Eclipse variables
*
* @since 3.0
*/
public class EclipseVariablesVariableSupplier implements ICdtVariableSupplier {
private static final Pattern RESOURCE_VARIABLE_PATTERN= Pattern.compile("(project|resource|container)_(loc|path|name)"); //$NON-NLS-1$
// private static final String VAR_PREFIX = "${"; //$NON-NLS-1$
// private static final char VAR_SUFFIX = '}';
private static final char COLON = ':';
private static EclipseVariablesVariableSupplier fInstance;
private EclipseVariablesVariableSupplier(){
}
public static EclipseVariablesVariableSupplier getInstance(){
if(fInstance == null)
fInstance = new EclipseVariablesVariableSupplier();
return fInstance;
}
public class EclipseVarMacro extends CdtVariable {
private IStringVariable fVariable;
private String fArgument;
private boolean fInitialized;
private EclipseVarMacro(IStringVariable var){
this(var,null);
}
private EclipseVarMacro(IStringVariable var, String argument){
fVariable = var;
fType = VALUE_TEXT;
fName = var.getName();
if(argument != null)
fName += COLON + argument;
fArgument = argument;
}
/* (non-Javadoc)
* @see org.eclipse.cdt.managedbuilder.macros.IBuildMacro#getStringValue()
*/
@Override
public String getStringValue() throws CdtVariableException {
if(!fInitialized){
try {
if (!canExpandVariable(fVariable.getName(), fArgument)) {
final String expression= "${"+fName+"}"; //$NON-NLS-1$//$NON-NLS-2$
throw new CdtVariableException(ICdtVariableStatus.TYPE_MACRO_REFERENCE_INCORRECT,
NLS.bind(Messages.EclipseVariablesVariableSupplier_illegal_variable, expression),
null,
fVariable.getName(), expression, null);
}
loadValue(fVariable);
} finally {
fInitialized = true;
}
}
return fStringValue;
}
private void loadValue(IStringVariable var) throws CdtVariableException {
if(var instanceof IDynamicVariable){
IDynamicVariable dynamicVar = (IDynamicVariable)var;
if(fArgument == null || dynamicVar.supportsArgument()){
try{
fStringValue = dynamicVar.getValue(fArgument);
}catch(CoreException e){
fStringValue = null;
}
}else
fStringValue = null;
}else if(var instanceof IValueVariable){
if(fArgument == null)
fStringValue = ((IValueVariable)var).getValue();
else
fStringValue = null;
}
}
public IStringVariable getVariable(){
return fVariable;
}
}
/* (non-Javadoc)
* @see org.eclipse.cdt.managedbuilder.macros.IBuildMacroSupplier#getMacro(java.lang.String, int, java.lang.Object)
*/
public ICdtVariable getVariable(String macroName, IVariableContextInfo info) {
return getVariable(macroName);
}
public ICdtVariable getVariable(String macroName) {
// if(contextType != DefaultMacroContextInfo.CONTEXT_WORKSPACE)
// return null;
if(macroName == null || "".equals(macroName)) //$NON-NLS-1$
return null;
String varName = null;
String param = null;
IStringVariable var = null;
int index = macroName.indexOf(COLON);
if(index == -1)
varName = macroName;
else if(index > 0){
varName = macroName.substring(0,index);
param = macroName.substring(index+1);
}
if(varName != null){
IStringVariableManager mngr = VariablesPlugin.getDefault().getStringVariableManager();
var = mngr.getValueVariable(varName);
if(var == null)
var = mngr.getDynamicVariable(varName);
}
if(var != null)
return new EclipseVarMacro(var,param);
return null;
}
/* (non-Javadoc)
* @see org.eclipse.cdt.managedbuilder.macros.IBuildMacroSupplier#getMacros(int, java.lang.Object)
*/
public ICdtVariable[] getVariables(IVariableContextInfo info) {
return getVariables();
}
public ICdtVariable[] getVariables() {
// if(contextType != DefaultMacroContextInfo.CONTEXT_WORKSPACE)
// return null;
IStringVariableManager mngr = VariablesPlugin.getDefault().getStringVariableManager();
IDynamicVariable vars[] = mngr.getDynamicVariables();
Map<String, IStringVariable> map = new HashMap<String, IStringVariable>();
for (IDynamicVariable var : vars) {
final String name= var.getName();
if (!isDeadlockProneVariable(name)) {
map.put(name,var);
}
}
IValueVariable valVars[] = mngr.getValueVariables();
for (IValueVariable valVar : valVars)
map.put(valVar.getName(),valVar);
Collection<IStringVariable> collection = map.values();
EclipseVarMacro macros[] = new EclipseVarMacro[collection.size()];
Iterator<IStringVariable> iter = collection.iterator();
for(int i = 0; i < macros.length ; i++)
macros[i] = new EclipseVarMacro(iter.next());
return macros;
}
/**
* Test for Eclipse variables with known deadlock issues.
* @param name variable name
* @return whether the variable is prone to deadlocks
*/
private static boolean isDeadlockProneVariable(String name) {
return RESOURCE_VARIABLE_PATTERN.matcher(name).matches()
|| name.endsWith("_prompt") //$NON-NLS-1$
|| name.equals("selected_text"); //$NON-NLS-1$
}
private static boolean canExpandVariable(String name, String argument) {
if (argument == null && RESOURCE_VARIABLE_PATTERN.matcher(name).matches()) {
return false;
}
if (name.endsWith("_prompt") || name.equals("selected_text")) { //$NON-NLS-1$//$NON-NLS-2$
return false;
}
return true;
}
// private String getMacroValue(String name){
// IStringVariableManager mngr = VariablesPlugin.getDefault().getStringVariableManager();
// try{
// return mngr.performStringSubstitution(VAR_PREFIX + name + VAR_SUFFIX);
// }catch (CoreException e){
// }
//
// return null;
// }
}
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