plugins/org.eclipse.ldt.ui/src/org/eclipse/ldt/ui/wizards/pages/LuaProjectSettingsPage.java

/*******************************************************************************
 * Copyright (c) 2012 Sierra Wireless 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:
 *     Sierra Wireless - initial API and implementation
 *******************************************************************************/
package org.eclipse.ldt.ui.wizards.pages;

import java.util.Observable;
import java.util.Observer;

import org.eclipse.dltk.ui.wizards.ProjectWizardFirstPage;
import org.eclipse.ldt.core.buildpath.LuaExecutionEnvironment;
import org.eclipse.ldt.core.internal.grammar.LuaGrammarManager;
import org.eclipse.swt.widgets.Composite;

/**
 * A restriction of {@link ProjectWizardFirstPage}, remove useless UI elements:
 * <ul>
 * <li>interpreters</li>
 * <li>hosts</li>
 * </ul>
 */
public class LuaProjectSettingsPage extends ProjectWizardFirstPage implements Observer {

	private LuaExecutionEnvironmentGroup luaExecutionEnvironmentGroup;
	private GrammarGroup grammarGroup;

	public LuaProjectSettingsPage() {
		setTitle(Messages.LuaProjecSettingsPageLabel);
	}

	/**
	 * Interpreters are not supported yet. Related UI options and functionality should be disabled.
	 * 
	 * @see ProjectWizardFirstPage#supportInterpreter()
	 * @return false
	 */
	@Override
	protected boolean supportInterpreter() {
		return false;
	}

	/**
	 * Provide specific {@link LocationGroup} in order to avoid UI section dealing with Host, as no host is currently used.
	 * 
	 * @see ProjectWizardFirstPage#createLocationGroup()
	 */
	@Override
	protected LocationGroup createLocationGroup() {
		return new LuaLocationGroup();
	}

	protected void createCustomGroups(final Composite composite) {
		luaExecutionEnvironmentGroup = createExecutionEnvironmentGroup(composite);
		grammarGroup = createGrammarGroup(composite);
		String defaultGrammar = LuaGrammarManager.getDefaultGrammarFor(getExecutionEnvironment()).getName();
		grammarGroup.setDefaultGrammar(defaultGrammar);
	}

	protected GrammarGroup createGrammarGroup(Composite composite) {
		return new GrammarGroup(composite);
	}

	protected LuaExecutionEnvironmentGroup createExecutionEnvironmentGroup(final Composite composite) {
		return new LuaExecutionEnvironmentGroup(composite);
	}

	/**
	 * Just disable <i>Host</i> section defined in {@link LuaLocationGroup#fEnvironment}
	 * 
	 * @see LuaLocationGroup#fEnvironment
	 */
	public class LuaLocationGroup extends LocationGroup {
		@Override
		protected void createEnvironmentControls(final Composite group, final int numColumns) {
		}
	}

	public LuaExecutionEnvironment getExecutionEnvironment() {
		if (luaExecutionEnvironmentGroup != null)
			return luaExecutionEnvironmentGroup.getSelectedLuaExecutionEnvironment();
		return null;
	}

	public String getGrammar() {
		if (grammarGroup != null)
			return grammarGroup.getSelectedGrammar();
		return null;
	}

	/**
	 * 
	 * @deprecated Use hasToCreateTemplate() instead.
	 */
	public boolean hasToCreateMain() {
		return hasToCreateTemplate();
	}

	/**
	 * @since 1.1
	 */
	public boolean hasToCreateTemplate() {
		return luaExecutionEnvironmentGroup != null && luaExecutionEnvironmentGroup.hasToCreateMain();
	}

	@Override
	public void createControl(Composite parent) {
		super.createControl(parent);
		fLocationGroup.addObserver(this);
		luaExecutionEnvironmentGroup.addObserver(new Observer() {

			@Override
			public void update(Observable o, Object arg) {
				LuaExecutionEnvironment ee = getExecutionEnvironment();
				grammarGroup.setDefaultGrammar(LuaGrammarManager.getDefaultGrammarFor(ee).getName());
			}
		});
	}

	@Override
	public boolean isPageComplete() {
		// we override it to :
		// not allow to finish the wizard when the user choose to create a project from an existing location
		// The goal is to force the user to go to the buildpath page to set its sourcepath.
		return super.isPageComplete() && (!fLocationGroup.isExternalProject() || !isCurrentPage());
	}

	@Override
	public boolean canFlipToNextPage() {
		// we override to use the parent isCompletePage method.
		// (to be able to go next page even if an existing location for the project is chosen)
		return super.isPageComplete() && getNextPage() != null;
	}

	@Override
	public void update(Observable o, Object arg) {
		getContainer().updateButtons();
	}
}