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/*******************************************************************************
 *  Copyright (c) 2007, 2017 IBM Corporation and others.
 *
 *  This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License 2.0
 *  which accompanies this distribution, and is available at
 *  https://www.eclipse.org/legal/epl-2.0/
 *
 *  SPDX-License-Identifier: EPL-2.0
 *
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.equinox.internal.p2.ui.sdk.prefs;

import org.eclipse.core.runtime.preferences.DefaultScope;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.sdk.*;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.MessageDialogWithToggle;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.*;
import org.osgi.service.prefs.Preferences;

/**
 * Preference page for general provisioning preferences.
 *
 * @since 3.4
 */

public class ProvisioningPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

	private Group browsingGroup, validateGroup;
	private Button showLatestRadio, showAllRadio;
	private Button alwaysShowFailedPlan, neverShowFailedPlan, promptOnFailedPlan;
	private Button checkAgainstCurrentCheckbox;

	@Override
	protected Control createContents(Composite parent) {
		PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IProvSDKHelpContextIds.PROVISIONING_PREFERENCE_PAGE);

		Composite container = new Composite(parent, SWT.NULL);
		GridLayout layout = new GridLayout();
		layout.marginWidth = layout.marginHeight = 0;
		container.setLayout(layout);

		// Group for show all versions vs. show latest
		browsingGroup = new Group(container, SWT.NONE);
		browsingGroup.setText(ProvSDKMessages.ProvisioningPreferencePage_BrowsingPrefsGroup);
		layout = new GridLayout();
		layout.numColumns = 3;
		browsingGroup.setLayout(layout);
		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
		browsingGroup.setLayoutData(gd);

		showLatestRadio = new Button(browsingGroup, SWT.RADIO);
		showLatestRadio.setText(ProvSDKMessages.ProvisioningPreferencePage_ShowLatestVersions);
		gd = new GridData();
		gd.horizontalSpan = 3;
		showLatestRadio.setLayoutData(gd);

		showAllRadio = new Button(browsingGroup, SWT.RADIO);
		showAllRadio.setText(ProvSDKMessages.ProvisioningPreferencePage_ShowAllVersions);
		gd = new GridData();
		gd.horizontalSpan = 3;
		showAllRadio.setLayoutData(gd);

		//Group for validating a failed plan
		validateGroup = new Group(container, SWT.NONE);
		validateGroup.setText(ProvSDKMessages.ProvisioningPreferencePage_OpenWizardIfInvalid);
		layout = new GridLayout();
		layout.numColumns = 3;
		validateGroup.setLayout(layout);
		gd = new GridData(GridData.FILL_HORIZONTAL);
		validateGroup.setLayoutData(gd);

		alwaysShowFailedPlan = new Button(validateGroup, SWT.RADIO);
		alwaysShowFailedPlan.setText(ProvSDKMessages.ProvisioningPreferencePage_AlwaysOpenWizard);
		gd = new GridData();
		gd.horizontalSpan = 3;
		alwaysShowFailedPlan.setLayoutData(gd);

		neverShowFailedPlan = new Button(validateGroup, SWT.RADIO);
		neverShowFailedPlan.setText(ProvSDKMessages.ProvisioningPreferencePage_NeverOpenWizard);
		gd = new GridData();
		gd.horizontalSpan = 3;
		neverShowFailedPlan.setLayoutData(gd);

		promptOnFailedPlan = new Button(validateGroup, SWT.RADIO);
		promptOnFailedPlan.setText(ProvSDKMessages.ProvisioningPreferencePage_PromptToOpenWizard);
		gd = new GridData();
		gd.horizontalSpan = 3;
		promptOnFailedPlan.setLayoutData(gd);

		checkAgainstCurrentCheckbox = new Button(container, SWT.CHECK);
		checkAgainstCurrentCheckbox.setText(ProvSDKMessages.ProvisioningPreferencePage_checkCompatibleWithCurrentJRE);

		//Link to installed software page
		//See https://bugs.eclipse.org/bugs/show_bug.cgi?id=313242
		Link link = new Link(container, SWT.PUSH);
		link.setText(ProvSDKMessages.ProvisioningPreferencePage_UninstallUpdateLink);
		link.addListener(SWT.Selection, event -> ProvUI.openInstallationDialog(event));

		initialize();

		Dialog.applyDialogFont(container);
		return container;

	}

	private void initialize() {
		IPreferenceStore pref = ProvSDKUIActivator.getDefault().getPreferenceStore();
		showLatestRadio.setSelection(pref.getBoolean(PreferenceConstants.PREF_SHOW_LATEST_VERSION));
		showAllRadio.setSelection(!pref.getBoolean(PreferenceConstants.PREF_SHOW_LATEST_VERSION));
		String openWizard = pref.getString(PreferenceConstants.PREF_OPEN_WIZARD_ON_ERROR_PLAN);
		alwaysShowFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.ALWAYS));
		neverShowFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.NEVER));
		promptOnFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.PROMPT));
		checkAgainstCurrentCheckbox.setSelection(pref.getBoolean(PreferenceConstants.PREF_CHECK_AGAINST_CURRENT_JRE));
	}

	@Override
	protected void performDefaults() {
		super.performDefaults();
		Preferences pref = DefaultScope.INSTANCE.getNode(ProvSDKUIActivator.PLUGIN_ID);
		showLatestRadio.setSelection(pref.getBoolean(PreferenceConstants.PREF_SHOW_LATEST_VERSION, false));
		showAllRadio.setSelection(!pref.getBoolean(PreferenceConstants.PREF_SHOW_LATEST_VERSION, false));
		String openWizard = pref.get(PreferenceConstants.PREF_OPEN_WIZARD_ON_ERROR_PLAN, ""); //$NON-NLS-1$
		alwaysShowFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.ALWAYS));
		neverShowFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.NEVER));
		promptOnFailedPlan.setSelection(openWizard.equals(MessageDialogWithToggle.PROMPT));
		checkAgainstCurrentCheckbox
				.setSelection(pref.getBoolean(PreferenceConstants.PREF_CHECK_AGAINST_CURRENT_JRE, false));
	}

	@Override
	public boolean performOk() {
		IPreferenceStore pref = ProvSDKUIActivator.getDefault().getPreferenceStore();
		pref.setValue(PreferenceConstants.PREF_SHOW_LATEST_VERSION, showLatestRadio.getSelection());
		if (alwaysShowFailedPlan.getSelection())
			pref.setValue(PreferenceConstants.PREF_OPEN_WIZARD_ON_ERROR_PLAN, MessageDialogWithToggle.ALWAYS);
		else if (neverShowFailedPlan.getSelection())
			pref.setValue(PreferenceConstants.PREF_OPEN_WIZARD_ON_ERROR_PLAN, MessageDialogWithToggle.NEVER);
		else
			pref.setValue(PreferenceConstants.PREF_OPEN_WIZARD_ON_ERROR_PLAN, MessageDialogWithToggle.PROMPT);
		pref.setValue(PreferenceConstants.PREF_CHECK_AGAINST_CURRENT_JRE, checkAgainstCurrentCheckbox.getSelection());
		ProvSDKUIActivator.getDefault().savePreferences();
		return true;
	}

	@Override
	public void init(IWorkbench workbench) {
		// Nothing to do
	}

}

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