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Geomajas GWT2 client: Commons - Implementation
/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2015 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.gwt.client.util;
import org.geomajas.annotation.Api;
import org.geomajas.gwt.client.util.impl.DomImpl;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Window.Navigator;
/**
* Extension of the GWT DOM class, to support elements and attributes with specific name-spaces. These name-spaces
* will generally be used for SVG support in geomajas.
When using these functions, note that they behave
* differently in Internet Explorer! Also, there is an initialization function for VML (used only in IE). Call this
* function before attempting to use VML on a page.
*
* @author Pieter De Graef
* @author Jan De Moerloose
* @since 2.0.0
*/
@Api(allMethods = true)
public class Dom extends com.google.gwt.user.client.DOM {
private static final DomImpl IMPL = GWT.create(DomImpl.class);
/**
* XLINK name-space. Used in attributes, referencing other elements.
*/
public static final String NS_XLINK = "http://www.w3.org/1999/xlink";
/**
* General SVG name-space.
*/
public static final String NS_SVG = "http://www.w3.org/2000/svg";
/**
* General VML name-space.
*/
public static final String NS_VML = "vml";
/**
* General HTML name-space.
*/
public static final String NS_HTML = "html";
/**
* Separator character for DOM element id's.
*/
public static final String ID_SEPARATOR = "-";
// array with the most used mobile user agents
private static final String[] MOBILE_PLATFORMS = { "iphone", "ipod", "ipad", "android", "blackberry", "fennec" };
/**
* Initialization of the VML name-spaces. In order to be able to use VML in a page, this function has to be called
* first!
*/
public static void initVMLNamespace() {
IMPL.initVMLNamespace();
}
/**
* Assemble an DOM id.
*
* @param id base id
* @param suffixes suffixes to add
* @return id
*/
public static String assembleId(String id, String... suffixes) {
return IMPL.assembleId(id, suffixes);
}
/**
* Disassemble an DOM id, removing suffixes.
*
* @param id base id
* @param suffixes suffixes to remove
* @return id
*/
public static String disAssembleId(String id, String... suffixes) {
return IMPL.disAssembleId(id, suffixes);
}
/**
* Creates a new DOM element in the given name-space. If the name-space is HTML, a normal element will be
* created.
There is an exception when using Internet Explorer! For Internet Explorer a new element will be
* created of type "namespace:tag".
*
* @param ns The name-space to be used in the element creation.
* @param tag The tag-name to be used in the element creation.
* @return Returns a newly created DOM element in the given name-space.
*/
public static Element createElementNS(String ns, String tag, String id) {
return IMPL.createElementNS(ns, tag, id);
}
/**
* Creates a new DOM element in the given name-space. If the name-space is HTML, a normal element will be
* created.
There is an exception when using Internet Explorer! For Internet Explorer a new element will be
* created of type "namespace:tag".
*
* @param ns The name-space to be used in the element creation.
* @param tag The tag-name to be used in the element creation.
* @return Returns a newly created DOM element in the given name-space.
*/
public static Element createElementNS(String ns, String tag) {
return IMPL.createElementNS(ns, tag);
}
/**
* Creates an HTML element with the given id.
*
* @param tagName the HTML tag of the element to be created
* @return the newly-created element
*/
public static Element createElement(String tagName, String id) {
return IMPL.createElement(tagName, id);
}
/**
* Adds a new attribute in the given name-space to an element.
There is an exception when using
* Internet Explorer! For Internet Explorer the attribute of type "namespace:attr" will be set.
*
* @param ns The name-space to be used in the element creation.
* @param element The element to which the attribute is to be set.
* @param attr The name of the attribute.
* @param value The new value for the attribute.
*/
public static void setElementAttributeNS(String ns, Element element, String attr, String value) {
IMPL.setElementAttributeNS(ns, element, attr, value);
}
/**
* Is the user currently running Internet Explorer?
*
* @return true or false - yes or no.
*/
public static boolean isIE() {
return IMPL.isIE();
}
/**
* Is the browser supporting SVG?
*
* @return true or false - yes or no.
*/
public static boolean isSvg() {
return IMPL.isSvg();
}
/**
* Is the user currently using FireFox?
*
* @return true or false - yes or no.
*/
public static boolean isFireFox() {
return IMPL.isFireFox();
}
/**
* Is the user currently using Chrome?
*
* @return true or false - yes or no.
*/
public static boolean isChrome() {
return IMPL.isChrome();
}
/**
* Is the user currently using Safari?
*
* @return true or false - yes or no.
*/
public static boolean isSafari() {
return IMPL.isSafari();
}
/**
* Is the user currently using a Webkit based browser (such as Chrome or Safari)?
*
* @return true or false - yes or no.
*/
public static boolean isWebkit() {
return IMPL.isWebkit();
}
/**
* Similar method to the "setInnerHTML", but specified for setting SVG. Using the regular setInnerHTML, it is not
* possible to set a string of SVG on an object. This method can do that. On the other hand, this method is better
* not used for setting normal HTML as an element's innerHTML.
*
* @param element The element onto which to set the SVG string.
* @param svg The string of SVG to set on the element.
*/
public static void setInnerSvg(Element element, String svg) {
IMPL.setInnerSvg(element, svg);
}
/**
* Clone a single SVG element.
*
* @param source The source SVG element.
* @return Returns the clone.
*/
public static Element cloneSvgElement(Element source) {
return IMPL.cloneSvgElement(source);
}
/**
* Convert a URL to an absolute URL. This assumes the page is at the application root.
*
* It converts relative URLs by prepending the HostPageBaseURL and converts classpath resources to use the resource
* dispatcher.
*
* @param url URL to convert
* @return converted URL
*/
public static String makeUrlAbsolute(String url) {
return IMPL.makeUrlAbsolute(url);
}
/**
* Determine whether one element is equal to, or the child of, another.
*
* @param parent the potential parent element
* @param child the potential child element
* @return true if the relationship holds
*/
public static boolean isOrHasChild(Element parent, Element child) {
return IMPL.isOrHasChild(parent, child);
}
/**
* Is the browser supporting transformations? Not all browsers offer alternatives, so this check can be necessary.
*
* @return true or false - yes or no.
*/
public static boolean isTransformationSupported() {
return IMPL.isTransformationSupported();
}
/**
* Set the CSS3 transform property (e.g. 'scale(2)').
*
* @param element
* @param transform
*/
public static void setTransform(Element element, String transform) {
IMPL.setTransform(element, transform);
}
/**
* Set the CSS3 transform-origin property (defaults to center, e.g. '10 px 20 px').
*
* @param element
* @param origin
*/
public static void setTransformOrigin(Element element, String origin) {
IMPL.setTransformOrigin(element, origin);
}
/**
* Checks if the user agent belongs to mobile browser. (iPhone, iPad, android blackberry or Nokia) Note that not all
* mobile devices are supported see detectmobilebrowsers.com for the most recent mobile user agents
*
* @return whether the browser is mobile (true or false)
*/
public static boolean isMobile() {
if (GWT.isClient()) {
String userAgent = Navigator.getUserAgent();
for (String platform : MOBILE_PLATFORMS) {
if (userAgent.toLowerCase().indexOf(platform) != -1) {
return true;
}
}
}
return false;
}
/**
* Checks if touch events are supported.
*
* @return whether the browser is running on device with touch support (true or false)
*/
public static native boolean isTouchSupported() /*-{
if (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
return true;
}
return false;
}-*/;
}