/*******************************************************************************
* 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.ui;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.erlide.engine.ErlangEngine;
import org.erlide.engine.model.ErlModelException;
import org.erlide.engine.model.erlang.IErlFunction;
import org.erlide.engine.model.erlang.IErlFunctionClause;
import org.erlide.engine.model.erlang.IErlModule;
import org.erlide.engine.model.root.IErlElement;
import org.erlide.util.ErlLogger;
import org.erlide.wrangler.refactoring.selection.IErlMemberSelection;
import org.erlide.wrangler.refactoring.util.GlobalParameters;
import org.erlide.wrangler.refactoring.util.WranglerUtils;
/**
* Input dialog which shows up all the function clauses in all modules in the
* project
*
* @author Gyorgy Orosz
* @version %I%, %G%
*/
public class RemoteFunctionClauseDialog extends AbstractInputDialog {
IErlMemberSelection initianlSelection = (IErlMemberSelection) GlobalParameters
.getWranglerSelection();
/**
* Sets back the initial Erlide selection
*/
public void resetSelection() {
WranglerUtils.highlightSelection(initianlSelection.getSelectionRange()
.getOffset(), initianlSelection.getSelectionRange().getLength(),
initianlSelection);
}
/**
* Constructor
*
* @param parentShell
* shell
* @param title
* Dialog title
*/
public RemoteFunctionClauseDialog(final Shell parentShell, final String title) {
super(parentShell, title);
}
private IErlFunctionClause functionClause = null;
@Override
protected Control createDialogArea(final Composite parent) {
final Composite composite = (Composite) super.createDialogArea(parent);
final Tree functionClausesTree;
final Label label = new Label(composite, SWT.WRAP);
label.setText("Please select the function clause which against should fold!");
final GridData minToksData = new GridData(GridData.GRAB_HORIZONTAL
| GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL
| GridData.VERTICAL_ALIGN_CENTER);
minToksData.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
label.setLayoutData(minToksData);
label.setFont(parent.getFont());
functionClausesTree = new Tree(composite, SWT.BORDER);
final GridData treeData = new GridData(GridData.GRAB_HORIZONTAL
| GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL
| GridData.VERTICAL_ALIGN_CENTER);
treeData.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
functionClausesTree.setLayoutData(treeData);
try {
final Collection<IErlModule> erlmodules = ErlangEngine.getInstance()
.getModelUtilService()
.getProject(GlobalParameters.getWranglerSelection().getErlElement())
.getModules();
for (final IErlModule m : erlmodules) {
// must refresh the scanner!
m.open(null);
final TreeItem moduleName = new TreeItem(functionClausesTree, 0);
moduleName.setText(m.getModuleName());
moduleName.setData(m);
final List<IErlFunction> functions = filterFunctions(m.getChildren());
for (final IErlFunction f : functions) {
final TreeItem functionName = new TreeItem(moduleName, 0);
functionName.setText(f.getNameWithArity());
final List<IErlFunctionClause> clauses = filterClauses(f
.getChildren());
functionName.setData(f);
for (final IErlFunctionClause c : clauses) {
final TreeItem clauseName = new TreeItem(functionName, 0);
clauseName.setText(String.valueOf(c.getName()));
clauseName.setData(c);
}
}
}
// listen to treeitem selection
functionClausesTree.addSelectionListener(new SelectionListener() {
@Override
public void widgetDefaultSelected(final SelectionEvent e) {
}
// if a function or a function clause is selected, then
// highlight it
// and store the selection
@Override
public void widgetSelected(final SelectionEvent e) {
final TreeItem[] selectedItems = functionClausesTree.getSelection();
if (selectedItems.length > 0) {
final TreeItem treeItem = selectedItems[0];
final Object data = treeItem.getData();
if (data instanceof IErlFunctionClause) {
// enable the ok button
okButton.setEnabled(true);
// highlight
WranglerUtils.highlightSelection((IErlFunctionClause) data);
// store
functionClause = (IErlFunctionClause) data;
} else {
okButton.setEnabled(false);
}
}
}
});
} catch (final ErlModelException e) {
ErlLogger.error(e);
}
applyDialogFont(composite);
return composite;
}
protected List<IErlFunctionClause> filterClauses(
final Collection<IErlElement> children) {
final ArrayList<IErlFunctionClause> clauses = new ArrayList<IErlFunctionClause>();
for (final IErlElement e : children) {
if (e instanceof IErlFunctionClause) {
clauses.add((IErlFunctionClause) e);
}
}
return clauses;
}
protected List<IErlFunction> filterFunctions(final Collection<IErlElement> elements) {
final ArrayList<IErlFunction> functions = new ArrayList<IErlFunction>();
for (final IErlElement e : elements) {
if (e instanceof IErlFunction) {
functions.add((IErlFunction) e);
}
}
return functions;
}
@Override
protected void validateInput() {
}
/**
* Returns the selected functionClause if there is.
*
* @return selected function clause
*/
public IErlFunctionClause getFunctionClause() {
return functionClause;
}
}