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${icefaces.product.name} Compat Component Library
/*
* Copyright 2004-2012 ICEsoft Technologies Canada Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS
* IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package com.icesoft.faces.utils;
import com.icesoft.faces.context.DOMContext;
import com.icesoft.faces.renderkit.dom_html_basic.HTML;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import java.util.Iterator;
import java.util.List;
/**
* This utility class uses DOM methods to render javascript and css resources to
* the page.
*
* @author gmccleary
*/
public final class AddResource {
private static final int TEXT_NODE_TYPE = 3;
private static final String LINK_ELM = "link";
private AddResource() {
}
// Methods to Add Javascript and CSS resources
/**
* Adds the given javascript to the given node
*
* @param parentNode
* @param resourceDirectory
* @param scriptFileName
* @param domContext
*/
public static void addJavaScriptToNode(Node parentNode,
String resourceDirectory,
String scriptFileName,
DOMContext domContext) {
// scan the given node for script elements
Element jsElement = null;
List scripts = DOMContext.findChildrenWithNodeName((Element) parentNode,
HTML.SCRIPT_ELEM);
Iterator scriptIterator = scripts.iterator();
while (scriptIterator.hasNext()) {
Element next = (Element) scriptIterator.next();
if (next.getAttribute("src")
.equalsIgnoreCase(resourceDirectory + scriptFileName)) {
jsElement = next;
}
}
// if js script already exists, then don't add it
if (jsElement == null) {
jsElement =
domContext.getDocument().createElement(HTML.SCRIPT_ELEM);
jsElement.setAttribute(HTML.SRC_ATTR,
resourceDirectory + scriptFileName);
jsElement.setAttribute("language", "javascript");
parentNode.appendChild(jsElement);
}
}
/**
* Adds the given javascript resource to the head node
*
* @param resourceDirectory
* @param scriptFileName
* @param domContext
*/
public static void addJavaScriptToHead(String resourceDirectory,
String scriptFileName,
DOMContext domContext) {
// extract the head node from the document
Document test = domContext.getDocument();
NodeList heads = test.getElementsByTagName("head");
Node headNode = null;
if (heads.getLength() > 0) {
headNode = heads.item(0);
} else { // no head exists , create one
Element head = domContext.createElement("head");
test.appendChild(head);
headNode = (Node) head;
}
addJavaScriptToNode(headNode, resourceDirectory, scriptFileName,
domContext);
}
/**
* Adds the given stylesheet resource to the head
*
* @param resourceDirectory
* @param cssFileName
* @param domContext
*/
public static void addStyleSheetToHead(String resourceDirectory,
String cssFileName,
DOMContext domContext) {
Document test = domContext.getDocument();
NodeList heads = test.getElementsByTagName("head");
Node headNode = heads.item(0);
// if stylesheet link already exists, then don't add it
Element styleElement = null;
List links = DOMContext
.findChildrenWithNodeName((Element) headNode, LINK_ELM);
Iterator linkIterator = links.iterator();
while (linkIterator.hasNext()) {
Element next = (Element) linkIterator.next();
if (next.getAttribute("href")
.equalsIgnoreCase(resourceDirectory + cssFileName)) {
styleElement = next;
}
}
if (styleElement == null) {
styleElement = domContext.getDocument().createElement(LINK_ELM);
styleElement.setAttribute(HTML.HREF_ATTR,
resourceDirectory + cssFileName);
styleElement.setAttribute("type", "text/css");
styleElement.setAttribute("rel", "stylesheet");
headNode.appendChild(styleElement);
}
}
/**
* Adds the given inline style to the head
*
* @param inlineStyle
* @param domContext
*/
public static void addInlineStyleToHead(String inlineStyle,
DOMContext domContext) {
// extract the head from the document element
Document test = domContext.getDocument();
NodeList heads = test.getElementsByTagName("head");
Node headNode = heads.item(0);
// extract style elements from head
Element styleElement = null;
List styles = DOMContext
.findChildrenWithNodeName((Element) headNode, HTML.STYLE_ELEM);
Iterator styleIterator = styles.iterator();
while (styleIterator.hasNext()) {
Element next = (Element) styleIterator.next();
if (next.hasChildNodes()) {
if (next.getFirstChild().getNodeType() == TEXT_NODE_TYPE) {
Text styleText = (Text) next.getFirstChild();
if (styleText.getNodeValue()
.equalsIgnoreCase(inlineStyle)) {
styleElement = next;
}
}
}
}
// if inline style already exists, then don't add it
if (styleElement == null) {
styleElement =
domContext.getDocument().createElement(HTML.STYLE_ELEM);
styleElement.setAttribute("type", "text/css");
styleElement.setAttribute("rel", "stylesheet");
Text inlineText = domContext.createTextNode(inlineStyle);
styleElement.appendChild(inlineText);
headNode.appendChild(styleElement);
}
}
}