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The advanced component library for ICEfaces.
/*
* 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 org.icefaces.ace.component.linkbutton;
import java.io.IOException;
import java.util.*;
import javax.faces.event.ActionEvent;
import javax.faces.event.ActionListener;
import javax.faces.component.UIComponent;
import javax.faces.component.UIParameter;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;
import org.icefaces.ace.util.HTML;
import org.icefaces.ace.util.JSONBuilder;
import org.icefaces.ace.util.ScriptWriter;
import org.icefaces.ace.util.Utils;
import org.icefaces.util.EnvUtils;
import org.icefaces.render.MandatoryResourceComponent;
import org.icefaces.ace.renderkit.CoreRenderer;
@MandatoryResourceComponent(tagName="linkButton", value="org.icefaces.ace.component.linkbutton.LinkButton")
public class LinkButtonRenderer extends CoreRenderer {
List uiParamChildren;
private static String[] excludedAttributes = {"onclick", "onkeydown", "hreflang", "href", "target", "style"};
public void decode(FacesContext facesContext, UIComponent uiComponent) {
Map requestParameterMap = facesContext.getExternalContext().getRequestParameterMap();
LinkButton link = (LinkButton) uiComponent;
if (requestParameterMap.containsKey("ice.event.captured")) {
String source = String.valueOf(requestParameterMap.get("ice.event.captured"));
String clientId = link.getClientId();
if (clientId.equals(source)) {
try {
uiComponent.queueEvent(new ActionEvent(uiComponent));
} catch (Exception e) {}
}
}
decodeBehaviors(facesContext, link);
}
public void encodeBegin(FacesContext facesContext, UIComponent uiComponent)
throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = uiComponent.getClientId(facesContext);
LinkButton linkButton = (LinkButton) uiComponent;
// capture any children UIParameter (f:param) parameters.
uiParamChildren = Utils.captureParameters( linkButton );
writer.startElement(HTML.DIV_ELEM, uiComponent );
writer.writeAttribute(HTML.ID_ATTR, clientId, null);
String styleClass = linkButton.getStyleClass();
String styleClassVal = "";
if (styleClass != null && styleClass.trim().length() > 0) {
styleClassVal = " " + styleClass;
}
writer.writeAttribute(HTML.CLASS_ATTR, "ice-linkbutton" + styleClassVal, null);
String style = linkButton.getStyle();
if (style != null && style.trim().length() > 0) {
writer.writeAttribute(HTML.STYLE_ATTR, style, HTML.STYLE_ATTR);
}
//writer.startElement(HTML.INPUT_ELEM, uiComponent);
writer.startElement(HTML.SPAN_ELEM, uiComponent);
writer.writeAttribute(HTML.ID_ATTR, clientId+"_span", null);
styleClass = "yui-button yui-link-button ui-button ui-widget";
boolean disabled = linkButton.isDisabled();
if (disabled) {
styleClass += " yui-button-disabled yui-link-button-disabled";
}
writer.writeAttribute(HTML.CLASS_ATTR, styleClass, null);
// first child
writer.startElement(HTML.SPAN_ELEM, uiComponent);
styleClass = "first-child";
writer.writeAttribute(HTML.CLASS_ATTR, styleClass, null);
if (disabled) {
// writer.write((String) linkButton.getValue());
return;
}
// button element
writer.startElement(HTML.ANCHOR_ELEM, uiComponent);
renderPassThruAttributes(facesContext, linkButton, HTML.LINK_ATTRS, excludedAttributes);
String userOnclick = (String) linkButton.getAttributes().get("onclick");
userOnclick = userOnclick == null ? "" : userOnclick + ";";
// Uncomment this for the so - called inline model onclick handler
writer.writeAttribute(HTML.ONCLICK_ATTR, userOnclick +
"return ice.ace.linkButton.clickHandler(event, '" + clientId + "' );",
null);
String temp;
if ((temp = linkButton.getHref()) != null) {
if (uiParamChildren != null) {
temp += "?" + Utils.asParameterString( uiParamChildren );
}
writer.writeAttribute(HTML.HREF_ATTR, temp, null );
} else {
String userOnkeydown = (String) linkButton.getAttributes().get("onkeydown");
userOnkeydown = userOnkeydown == null ? "" : userOnkeydown + ";";
// if there's no href, install a default key handler to catch the enter key
writer.writeAttribute(HTML.ONKEYDOWN_ATTR, userOnkeydown +
"return ice.ace.linkButton.keyDownHandler(event, '" + clientId + "' );",
null);
}
if ((temp = linkButton.getHrefLang()) != null) {
writer.writeAttribute(HTML.HREFLANG_ATTR, temp , null );
}
if ((temp = linkButton.getTarget()) != null) {
writer.writeAttribute(HTML.TARGET_ATTR, temp, null );
}
}
public void encodeEnd(FacesContext facesContext, UIComponent uiComponent)
throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = uiComponent.getClientId(facesContext);
LinkButton linkButton = (LinkButton) uiComponent;
String value = (String) linkButton.getValue();
// put the value here to minimize impact in rendering
writer.writeText(value, null);
boolean disabled = linkButton.isDisabled();
if (!disabled) {
writer.endElement(HTML.ANCHOR_ELEM);
}
writer.endElement(HTML.SPAN_ELEM);
writer.endElement(HTML.SPAN_ELEM);
// With Action or ActionListener attributes, don't act as a normal link
ActionListener[] al = linkButton.getActionListeners();
boolean doAction = (al.length > 0 || (linkButton.getActionExpression() != null));
StringBuilder sb = new StringBuilder();
sb.append( value ).
append(linkButton.getHref()).
append(linkButton.getHrefLang()).
append(linkButton.getStyleClass()).
append(linkButton.getStyle()).
append(linkButton.getTarget());
boolean ariaEnabled = EnvUtils.isAriaEnabled(facesContext);
Integer tabindex = linkButton.getTabindex();
if (ariaEnabled && tabindex == null) tabindex = 0;
JSONBuilder jsonBuilder = JSONBuilder.create().beginMap();
jsonBuilder.entry("type", "link");
if (tabindex != null) {
jsonBuilder.entry("tabindex", tabindex);
}
jsonBuilder.entry("label", (String) linkButton.getValue());
jsonBuilder.entry("disabled", disabled);
encodeClientBehaviors(facesContext, linkButton, jsonBuilder);
String jsProps = jsonBuilder.endMap().toString();
JSONBuilder jBuild = JSONBuilder.create().
beginMap().
entry("doAction", doAction).
entry("hashCode", sb.toString().hashCode()).
entry("ariaEnabled", ariaEnabled);
if (doAction && uiParamChildren != null) {
jBuild.entry("postParameters", Utils.asStringArray(uiParamChildren) );
}
String params = "'" + clientId + "'," +
jsProps
+ "," + jBuild.endMap().toString();
String finalScript = "ice.ace.linkButton.updateProperties(" + params + ");";
ScriptWriter.insertScript(facesContext, uiComponent, finalScript);
writer.endElement(HTML.DIV_ELEM);
}
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