/*******************************************************************************
* Copyright (c) 2010 György Orosz.
* 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:
* György Orosz - initial API and implementation
******************************************************************************/
package org.erlide.wrangler.refactoring.core.internal;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.erlide.wrangler.refactoring.backend.IRefactoringRpcMessage;
import org.erlide.wrangler.refactoring.backend.internal.WranglerBackendManager;
import org.erlide.wrangler.refactoring.core.SimpleOneStepWranglerRefactoring;
import org.erlide.wrangler.refactoring.selection.IErlMemberSelection;
import org.erlide.wrangler.refactoring.selection.IErlSelection;
import org.erlide.wrangler.refactoring.selection.IErlSelection.SelectionKind;
import org.erlide.wrangler.refactoring.util.GlobalParameters;
import org.erlide.wrangler.refactoring.util.WranglerUtils;
/**
* Tuple function parameters refactoring integration
*
* @author Gyorgy Orosz
* @version %I%, %G%
*/
public class TupleFunctionParametersRefactoring extends SimpleOneStepWranglerRefactoring {
protected int numberOfTuplingParameters = -1;
@Override
public RefactoringStatus checkInitialConditions(final IProgressMonitor pm)
throws CoreException, OperationCanceledException {
final IErlSelection sel = GlobalParameters.getWranglerSelection();
if (sel instanceof IErlMemberSelection) {
final SelectionKind kind = sel.getKind();
if (kind == SelectionKind.FUNCTION_CLAUSE || kind == SelectionKind.FUNCTION) {
final IErlMemberSelection s = (IErlMemberSelection) sel;
numberOfTuplingParameters = calculateParametersNumber(WranglerUtils
.getTextFromEditor(s.getSelectionRange(), s.getDocument()));
if (numberOfTuplingParameters > 0) {
return new RefactoringStatus();
}
}
}
return RefactoringStatus
.createFatalErrorStatus("Please select function parameters!");
}
private int calculateParametersNumber(final String textFromEditor) {
int noC = 0;
int depth = 0;
for (int i = 0; i < textFromEditor.length(); ++i) {
final char c = textFromEditor.charAt(i);
switch (c) {
case '{':
case '(':
case '[':
depth++;
break;
case ')':
case '}':
case ']':
depth--;
break;
case ',':
if (depth == 0) {
noC++;
}
break;
}
}
if (depth == 0) {
return noC + 1;
}
return -1;
}
@Override
public String getName() {
return "Tuple functon parameters";
}
@Override
public IRefactoringRpcMessage run(final IErlSelection selection) {
final IErlMemberSelection sel = (IErlMemberSelection) selection;
return WranglerBackendManager.getRefactoringBackend().call(
"tuple_funpar_eclipse", "sxxxi", sel.getFilePath(),
sel.getSelectionRange().getStartPos(),
sel.getSelectionRange().getEndPos(), sel.getSearchPath(),
GlobalParameters.getTabWidth());
}
}