org.nasdanika.html.app.viewparts.NavigationBarViewPart Maven / Gradle / Ivy

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package org.nasdanika.html.app.viewparts;

import java.util.List;
import java.util.Map.Entry;
import java.util.function.Consumer;

import org.nasdanika.common.Context;
import org.nasdanika.common.ProgressMonitor;
import org.nasdanika.html.Event;
import org.nasdanika.html.Fragment;
import org.nasdanika.html.HTMLElement;
import org.nasdanika.html.Tag;
import org.nasdanika.html.app.Action;
import org.nasdanika.html.app.ActionActivator;
import org.nasdanika.html.app.Label;
import org.nasdanika.html.app.NavigationActionActivator;
import org.nasdanika.html.app.ScriptActionActivator;
import org.nasdanika.html.app.ViewGenerator;
import org.nasdanika.html.app.ViewPart;
import org.nasdanika.html.app.impl.Util;
import org.nasdanika.html.bootstrap.Breakpoint;
import org.nasdanika.html.bootstrap.Color;
import org.nasdanika.html.bootstrap.Dropdown;
import org.nasdanika.html.bootstrap.Navbar;

/**
 * Builds a navigation bar from the principal action. 
 * Uses the action as a brand and its context children to build a navigation menu.
 * @author Pavel
 *
 */
public class NavigationBarViewPart implements ViewPart {

	protected List>> categoryGroups;
	protected Action activeAction;
	protected ViewPart brandPart;

	/**
	 * Builds a navigation bar view part from a list of actions and an active action.
	 * The actions are grouped into categories to build the navbar. 
	 * This constructor creates a navBar without brand.
	 * @param actions
	 * @param activeAction
	 */
	public NavigationBarViewPart(List actions, Action activeAction) {
		this.categoryGroups = Util.groupByCategory(actions);
		this.activeAction = activeAction;
	}
	
	/**
	 * Builds a navigation bar with a brand for a principal action. 
	 * @param principalAction
	 * @param activeAction
	 */
	public NavigationBarViewPart(Action principalAction, Action activeAction) {
		this(principalAction.getContextChildren(), activeAction);
		brandPart = (viewGenerator, progressMonitor) -> principalAction.getActivator() == null ? viewGenerator.label(principalAction) : viewGenerator.link(principalAction);
	}	

	@SuppressWarnings("unchecked")
	@Override
	public Object generate(ViewGenerator viewGenerator, ProgressMonitor progressMonitor) {
		Tag brand = brandPart == null ? null : (Tag) brandPart.generate(viewGenerator, progressMonitor);
		Navbar navBar = createNavbar(viewGenerator, brand);
		boolean hasContent = brand != null && !brand.isEmpty();
		
		for (Entry categoryGroup: categoryGroups) {
			Label category = categoryGroup.getKey();
			if (category == null || (Util.isBlank(category.getText()) && Util.isBlank(category.getIcon()))) {
				for (Action ca: (List) categoryGroup.getValue()) {
					hasContent = true;
					// Children are ignored if activator is not null.
					Fragment fragment = viewGenerator.getHTMLFactory().fragment();
					viewGenerator.label(ca, (Consumer