/*******************************************************************************
* Copyright (c) 2004 Lukas Larsson 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:
* Lukas Larsson
*******************************************************************************/
package org.erlide.ui.wizards;
import java.util.ArrayList;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.erlide.util.ErlLogger;
/**
* @author Lukas Larsson
*/
public class FunctionGroup implements SelectionListener {
public static final int FSM = 1;
public static final int NONE = 2;
// private final String currentSkeleton = "None";
private Table fTable;
private TableItem fEditingItem;
Text functionNameText;
Text arityText;
private final TableColumn[] tableColumns = new TableColumn[2];
Button addFunctionBtn;
// Button addStateBtn;
Button removeFunctionBtn;
Button editFunctionBtn;
Button exportButtonBtn;
ErlangFileWizardPage fWizPage;
FunctionGroup(final Composite parent, final ErlangFileWizardPage wizPage) {
final Group root = new Group(parent, SWT.NULL);
fWizPage = wizPage;
root.setText("Functions ");
GridData gd = new GridData(SWT.CENTER, SWT.CENTER, false, false);
root.setLayoutData(gd);
final GridLayout layout = new GridLayout(1, true);
root.setLayout(layout);
final Composite container = new Composite(root, SWT.NULL);
gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
container.setLayoutData(gd);
final RowLayout rlayout = new RowLayout(SWT.HORIZONTAL);
rlayout.fill = true;
container.setLayout(rlayout);
createTable(container);
createButtons(container);
createInputField(root);
dialogChanged();
}
private void createTable(final Composite parent) {
fTable = new Table(parent,
SWT.SINGLE | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.CHECK);
fTable.showSelection();
fTable.setHeaderVisible(true);
fTable.setLinesVisible(true);
fTable.addSelectionListener(this);
fTable.setItemCount(5);
tableColumns[0] = new TableColumn(fTable, SWT.CENTER);
tableColumns[0].setText("Export / Name");
tableColumns[0].setWidth(200);
tableColumns[0].addSelectionListener(this);
tableColumns[1] = new TableColumn(fTable, SWT.CENTER);
tableColumns[1].setText("Arity");
tableColumns[1].setWidth(50);
tableColumns[1].addSelectionListener(this);
}
private void createButtons(final Composite parent) {
final Composite container = new Composite(parent, SWT.NULL);
final GridLayout fill = new GridLayout(1, false);
container.setLayout(fill);
removeFunctionBtn = new Button(container, SWT.PUSH);
removeFunctionBtn.setText("Remove Function");
// removeFunction.setLayoutData(new
// GridData(SWT.FILL,SWT.CENTER,true,false));
removeFunctionBtn.addSelectionListener(this);
editFunctionBtn = new Button(container, SWT.PUSH);
editFunctionBtn.setText(" Edit Function ");
// editFunction.setLayoutData(new
// GridData(SWT.FILL,SWT.CENTER,true,false));
editFunctionBtn.addSelectionListener(this);
/*
* addState = new Button(container,SWT.PUSH); addState.setText(" Toggle
* State "); // addState.setLayoutData(new
* GridData(SWT.FILL,SWT.CENTER,true,false));
* addState.addSelectionListener(this);
*/
}
private void createInputField(final Composite parent) {
final Composite container = new Composite(parent, SWT.NULL);
container.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
final GridLayout layout = new GridLayout(4, false);
container.setLayout(layout);
exportButtonBtn = new Button(container, SWT.CHECK);
exportButtonBtn.setSelection(true);
exportButtonBtn.addSelectionListener(this);
functionNameText = new Text(container, SWT.BORDER | SWT.SINGLE);
functionNameText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
functionNameText.addModifyListener(new ModifyListener() {
@Override
public void modifyText(final ModifyEvent e) {
dialogChanged();
}
});
arityText = new Text(container, SWT.BORDER | SWT.SINGLE);
arityText.addModifyListener(new ModifyListener() {
@Override
public void modifyText(final ModifyEvent e) {
dialogChanged();
}
});
arityText.addKeyListener(new KeyListener() {
@Override
public void keyPressed(final KeyEvent e) {
fWizPage.gettingInput = true;
}
@Override
public void keyReleased(final KeyEvent e) {
fWizPage.gettingInput = false;
}
});
addFunctionBtn = new Button(container, SWT.PUSH);
addFunctionBtn.setText(" Apply ");
addFunctionBtn.setToolTipText("Create a new function or edit an existing one.");
addFunctionBtn.addSelectionListener(new SelectionListener() {
@Override
public void widgetSelected(final SelectionEvent e) {
addFunction(functionNameText.getText(),
Integer.parseInt(arityText.getText()), FunctionGroup.NONE,
exportButtonBtn.getSelection());
functionNameText.setText("");
arityText.setText("0");
}
@Override
public void widgetDefaultSelected(final SelectionEvent e) {
}
});
}
void addFunction(final String name, final int arity, final int type,
final boolean exported) {
final TableItem item = fEditingItem != null ? fEditingItem
: new TableItem(fTable, SWT.NULL, 0);
item.setChecked(exported);
item.setText(0, name + getPostfix(type));
item.setText(1, "" + arity);
fEditingItem = null;
final TableItem lastItem = fTable.getItem(fTable.getItemCount() - 1);
if ("".equals(lastItem.getText(0))) {
fTable.remove(fTable.getItemCount() - 1);
}
}
private String getPostfix(final int type) {
switch (type) {
case FunctionGroup.FSM:
return "(State)";
default:
return "";
}
}
void dialogChanged() {
if (functionNameText.getText().length() != 0) {
final TableItem[] allTableItems = fTable.getItems();
for (final TableItem element : allTableItems) {
if (element.getText(0).equals(functionNameText.getText())
&& element.getText(1).equals(arityText.getText())) {
updateStatus("Function already exists!");
return;
}
}
// check to see if this is a valid function name
final int functionNameASCII = functionNameText.getText().charAt(0);
if (!(functionNameASCII >= 'a' && functionNameASCII <= 'z')
&& functionNameASCII != '\'') {
updateStatus("Function name has to be a valid erlang atom.");
return;
}
try {
Integer.parseInt(arityText.getText());
} catch (final NumberFormatException e) {
updateStatus("The arity has to be an integer number.");
return;
}
updateStatus(null);
} else {
updateStatus(null);
addFunctionBtn.setEnabled(false);
}
}
private void updateStatus(final String message) {
// The wizard page
fWizPage.setErrorMessage(message);
fWizPage.setPageComplete(message == null);
// local buttons used for data input
addFunctionBtn.setEnabled(message == null);
}
public void enableFSM(final boolean value) {
// addState.setEnabled(value);
}
public Function[] getFunctionData() {
removeEdit();
final TableItem[] function = fTable.getItems();
final ArrayList<Function> functionList = new ArrayList<>();
for (final TableItem element : function) {
if (!"".equals(element.getText(0))) {
final Function f = new Function();
f.arity = Integer.parseInt(element.getText(1));
f.isExported = element.getChecked();
final String[] part = element.getText(0).split("\\(");
f.isState = "State)".equals(part[part.length - 1]);
if (f.isState) {
f.name = element.getText(0).substring(0,
element.getText(0).length() - 7);
} else {
f.name = element.getText(0);
}
functionList.add(f);
}
}
final Function[] functions = functionList
.toArray(new Function[functionList.size()]);
return functions;
}
@Override
public void widgetDefaultSelected(final SelectionEvent e) {
// do nothing, I don't even know when this event is triggered.
}
@Override
public void widgetSelected(final SelectionEvent e) {
ErlLogger.debug("widgetSelected: e.item = " + e.item);
ErlLogger.debug("widgetSelected: e.widget = " + e.widget);
if (e.widget == removeFunctionBtn) {
final TableItem[] itemsToRemove = fTable.getSelection();
for (final TableItem element : itemsToRemove) {
fTable.remove(fTable.indexOf(element));
if (element == fEditingItem) {
fEditingItem = null;
}
}
} else if (e.widget == editFunctionBtn) {
if (fEditingItem != null) {
removeEdit();
}
final int selectedIndex = fTable.getSelectionIndex();
final TableItem selectedItem = fTable.getItem(selectedIndex);
if (!"".equals(selectedItem.getText(0))) {
fEditingItem = selectedItem;
functionNameText.setText(selectedItem.getText(0));
arityText.setText(selectedItem.getText(1));
exportButtonBtn.setSelection(selectedItem.getChecked());
fEditingItem.setText(0, selectedItem.getText(0) + "<<Being Edited>>");
}
// } else if (e.widget == addState) {
}
dialogChanged();
}
private void removeEdit() {
if (fEditingItem != null) {
final String[] parts = fEditingItem.getText(0).split("<");
final StringBuilder functionName = new StringBuilder(parts[0]);
for (int i = 1; i < parts.length - 2; i++) {
functionName.append('<').append(parts[i]);
}
fEditingItem.setText(0, functionName.toString());
fEditingItem = null;
}
}
}