com.google.gwt.eclipse.core.preferences.ui.SpeedTracerPreferencePage.java Source code

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Here is the source code for com.google.gwt.eclipse.core.preferences.ui.SpeedTracerPreferencePage.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gwt.eclipse.core.preferences.ui;

import com.google.gwt.eclipse.core.GWTPluginLog;
import com.google.gwt.eclipse.core.preferences.GWTPreferences;
import com.google.gwt.eclipse.core.speedtracer.SourceViewerServer;

import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

/**
 * Page to manage preferences for SpeedTracer that apply across the workspace.
 */
public class SpeedTracerPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

    public static final String ID = SpeedTracerPreferencePage.class.getName();

    private Text portText;

    public SpeedTracerPreferencePage() {
    }

    public SpeedTracerPreferencePage(String title) {
        super(title);
    }

    public SpeedTracerPreferencePage(String title, ImageDescriptor image) {
        super(title, image);
    }

    public void init(IWorkbench workbench) {
    }

    @Override
    public boolean performOk() {

        int port = Integer.parseInt(portText.getText());

        if (port != GWTPreferences.getSourceViewerServerPort()) {
            GWTPreferences.setSourceViewerServerPort(port);

            try {
                SourceViewerServer.INSTANCE.stop();
            } catch (Throwable e) {
                GWTPluginLog.logError(e, "Could not stop source viewer server.");
            }

            SourceViewerServer.INSTANCE.setPort(port);

            try {
                SourceViewerServer.INSTANCE.start();
            } catch (Throwable e) {
                GWTPluginLog.logError(e, "Could not start source viewer server.");
            }
        }

        return super.performOk();
    }

    @Override
    protected Control createContents(Composite parent) {
        noDefaultAndApplyButton();

        Composite panel = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.numColumns = 2;
        layout.marginWidth = 0;
        layout.marginHeight = 0;
        layout.horizontalSpacing = 6;
        panel.setLayout(layout);

        Label portLabel = new Label(panel, SWT.NONE);
        portLabel.setText("Speed Tracer port:");

        portText = new Text(panel, SWT.SINGLE | SWT.BORDER);
        portText.setText(GWTPreferences.getSourceViewerServerPort() + "");
        portText.setTextLimit(5);

        portText.addListener(SWT.Verify, new Listener() {
            public void handleEvent(Event e) {
                String s = e.text;
                for (char c : s.toCharArray()) {
                    if (!('0' <= c && c <= '9')) {
                        e.doit = false;
                    }
                }
            }
        });

        portText.addListener(SWT.Modify, new Listener() {
            public void handleEvent(Event e) {
                String text = portText.getText();
                if (text.length() > 0) {
                    // the verify listener above should guarantee that the text is an int
                    int port = Integer.parseInt(text);
                    if (port > 65536) {
                        setErrorMessage("Port number cannot be greater than 65536.");
                        setValid(false);
                    } else {
                        setErrorMessage(null);
                        setValid(true);
                    }
                } else {
                    setErrorMessage("Port number cannot be empty.");
                    setValid(false);
                }
            }
        });

        GridData portTextLayoutData = new GridData(SWT.FILL, SWT.LEFT, false, false);
        portText.setLayoutData(portTextLayoutData);

        return panel;
    }
}