com.databasepreservation.visualization.shared.client.widgets.wcag.WCAGUtilities.java Source code

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Here is the source code for com.databasepreservation.visualization.shared.client.widgets.wcag.WCAGUtilities.java

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/**
 * The contents of this file are based on those found at https://github.com/keeps/roda
 * and are subject to the license and copyright detailed in https://github.com/keeps/roda
 */
package com.databasepreservation.visualization.shared.client.widgets.wcag;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Node;
import com.google.gwt.user.client.Random;

public class WCAGUtilities {

    private static final Set<String> INPUT_TAGNAMES = new HashSet<>(Arrays.asList("INPUT", "SELECT"));

    private static WCAGUtilities instance = null;

    public void makeAccessible(Element element) {

        if (element.getAttribute("align") != null) {
            String className = "";
            if (element.getAttribute("align").equals("right")) {
                className = "alignRight";
            } else if (element.getAttribute("align").equals("left")) {
                className = "alignLeft";
            } else if (element.getAttribute("align").equals("center")) {
                className = "alignCenter";
            } else {
                className = "alignJustify";
            }
            element.removeAttribute("align");
            element.addClassName(className);
        }

        if (INPUT_TAGNAMES.contains(element.getTagName())) {
            addAttributeIfNonExistent(element, "title", "t_" + Random.nextInt(1000), true);
        }

        if (element.getChildCount() > 0) {
            for (int i = 0; i < element.getChildCount(); i++) {
                if (element.getChild(i).getNodeType() == Node.ELEMENT_NODE) {
                    makeAccessible((Element) element.getChild(i));
                }
            }
        }

    }

    public static WCAGUtilities getInstance() {
        if (instance == null) {
            instance = new WCAGUtilities();
        }
        return instance;
    }

    public static void addAttributeIfNonExistent(Element element, String attributeName, String attributeValue) {
        addAttributeIfNonExistent(element, attributeName, attributeValue, false);
    }

    public static void addAttributeIfNonExistent(Element element, String attributeName, String attributeValue,
            boolean warn) {
        if (element.getAttribute(attributeName) == null
                || element.getAttribute(attributeName).equalsIgnoreCase("")) {
            if (warn) {
                // GWT.log("Setting of " + element.getTagName() + " attribute " +
                // attributeName + " to " + attributeValue);
            }
            element.setAttribute(attributeName, attributeValue);
        }
    }
}