src/plugins/translation/src/com/motorola/studio/android/localization/translators/preferences/ui/TranslationPreferencePage.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.motorola.studio.android.localization.translators.preferences.ui;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
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.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.browser.IWebBrowser;
import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
import org.osgi.service.prefs.BackingStoreException;

import com.motorola.studio.android.common.log.StudioLogger;
import com.motorola.studio.android.localization.translators.GoogleTranslatorConstants;
import com.motorola.studio.android.localization.translators.TranslationPlugin;
import com.motorola.studio.android.localization.translators.i18n.TranslateNLS;

public class TranslationPreferencePage extends PreferencePage implements IWorkbenchPreferencePage
{
    private final String GOOGLE_APIS_CONSOLE_LINK = "http://code.google.com/apis/console/"; //$NON-NLS-1$

    private Text apiKeyText;

    private String apiKeyValue;

    public void init(IWorkbench workbench)
    {
        noDefaultAndApplyButton();
    }

    @Override
    public boolean performOk()
    {
        InstanceScope scope = (InstanceScope) InstanceScope.INSTANCE;
        IEclipsePreferences prefs = scope.getNode(TranslationPlugin.PLUGIN_ID);
        if (apiKeyValue.trim().length() == 0)
        {
            prefs.remove(GoogleTranslatorConstants.API_KEY_VALUE_PREFERENCE);
        }
        else
        {
            prefs.put(GoogleTranslatorConstants.API_KEY_VALUE_PREFERENCE, apiKeyValue.trim());
        }

        try
        {
            prefs.flush();
        }
        catch (BackingStoreException e)
        {
            //do nothing
        }

        return super.performOk();
    }

    @Override
    protected Control createContents(Composite parent)
    {
        Composite entryTable = new Composite(parent, SWT.NULL);
        GridData data = new GridData(SWT.FILL, SWT.TOP, true, false);
        entryTable.setLayoutData(data);

        GridLayout layout = new GridLayout();
        entryTable.setLayout(layout);

        layout = new GridLayout(2, false);

        layout = new GridLayout(2, false);
        Group translatorAPIGroup = new Group(entryTable, SWT.NONE);
        translatorAPIGroup.setLayout(layout);
        translatorAPIGroup.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
        translatorAPIGroup.setText(TranslateNLS.AndroidPreferencePage_googleApiKey_GroupLabel);

        Link noteLabel = new Link(translatorAPIGroup, SWT.WRAP);
        noteLabel.setText(TranslateNLS.bind(TranslateNLS.AndroidPreferencePage_googleApiKey_Note,
                GOOGLE_APIS_CONSOLE_LINK));
        data = new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1);
        data.widthHint = 450;
        noteLabel.setLayoutData(data);

        noteLabel.addSelectionListener(new SelectionAdapter()
        {
            /* (non-Javadoc)
             * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
             */
            @Override
            public void widgetSelected(SelectionEvent e)
            {
                IWorkbenchBrowserSupport browserSupport =
                        PlatformUI.getWorkbench().getBrowserSupport();

                /*
                 * open the browser
                 */
                IWebBrowser browser;
                try
                {
                    browser =
                            browserSupport.createBrowser(IWorkbenchBrowserSupport.LOCATION_BAR
                                    | IWorkbenchBrowserSupport.NAVIGATION_BAR
                                    | IWorkbenchBrowserSupport.AS_EXTERNAL, "MOTODEV", null, null); //$NON-NLS-1$

                    browser.openURL(new URL(GOOGLE_APIS_CONSOLE_LINK));
                }
                catch (PartInitException ex)
                {
                    StudioLogger.error("Error opening the Google APIs Console link: " //$NON-NLS-1$
                            + ex.getMessage());
                }
                catch (MalformedURLException ex)
                {
                    StudioLogger.error("Error opening the Google APIs Console link: " //$NON-NLS-1$
                            + ex.getMessage());
                }
            }
        });

        Label apiKeyLabel = new Label(translatorAPIGroup, SWT.NONE);
        apiKeyLabel.setText(TranslateNLS.AndroidPreferencePage_googleApiKey_Label);
        data = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
        apiKeyLabel.setLayoutData(data);

        apiKeyText = new Text(translatorAPIGroup, SWT.BORDER);
        apiKeyValue = getApiKey();
        apiKeyText.setText(apiKeyValue);
        apiKeyText.setToolTipText(TranslateNLS.AndroidPreferencePage_googleApiKey_Tooltip);
        data = new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1);
        apiKeyText.setLayoutData(data);
        apiKeyText.addModifyListener(new ModifyListener()
        {
            public void modifyText(ModifyEvent e)
            {
                apiKeyValue = apiKeyText.getText();

            }
        });

        return entryTable;
    }

    /**
     * get the apikey
     * @return the apikey or an empty string for the default one
     */
    private static String getApiKey()
    {
        String apiKey = ""; //$NON-NLS-1$
        IPreferenceStore prefStore = TranslationPlugin.getDefault().getPreferenceStore();
        if (!prefStore.isDefault(GoogleTranslatorConstants.API_KEY_VALUE_PREFERENCE))
        {
            apiKey = prefStore.getString(GoogleTranslatorConstants.API_KEY_VALUE_PREFERENCE);
            if (apiKey == null)
            {
                apiKey = ""; //$NON-NLS-1$
            }
        }

        return apiKey;
    }

}