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/*
* Copyright 2004-2014 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.component.UIComponent;
import javax.faces.component.UIParameter;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.icefaces.component.PassthroughAttributes;
import org.icefaces.ace.util.*;
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 {
private final static String[] PASSTHROUGH_ATTRIBUTES = ((PassthroughAttributes) LinkButton.class.getAnnotation(PassthroughAttributes.class)).value();
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 {
LinkButton linkButton = (LinkButton) uiComponent;
ResponseWriter writer = facesContext.getResponseWriter();
List uiParams = Utils.captureParameters(linkButton);
String clientId = uiComponent.getClientId(facesContext);
String value = linkButton.getValue().toString();
Integer tabindex = linkButton.getTabindex();
boolean disabled = linkButton.isDisabled();
boolean ariaEnabled = EnvUtils.isAriaEnabled(facesContext);
boolean doAction = (linkButton.getActionListeners().length > 0 ||
(linkButton.getActionExpression() != null));
if (ariaEnabled && tabindex == null) tabindex = 0;
writer.startElement(HTML.DIV_ELEM, uiComponent );
writer.writeAttribute(HTML.ID_ATTR, clientId, null);
ComponentUtils.enableOnElementUpdateNotify(writer, clientId);
encodeRootStyle(linkButton, writer);
// first span
writer.startElement(HTML.SPAN_ELEM, null);
String styleClass = "yui-button yui-link-button ui-button ui-widget";
if (disabled)
styleClass += " yui-button-disabled yui-link-button-disabled";
writer.writeAttribute(HTML.CLASS_ATTR, styleClass, null);
// second span but "first-child"- ugh.
writer.startElement(HTML.SPAN_ELEM, null);
writer.writeAttribute(HTML.CLASS_ATTR, "first-child", null);
// button element
writer.startElement(HTML.ANCHOR_ELEM, null);
if (tabindex != null)
writer.writeAttribute(HTML.TABINDEX_ATTR, tabindex, null);
String style = linkButton.getStyle();
if (style != null && style.trim().length() > 0) {
writer.writeAttribute(HTML.STYLE_ATTR, style, HTML.STYLE_ATTR);
}
if (disabled) {
renderPassThruAttributes(facesContext, linkButton, new String[] {
"charset", "coords", "dir", "rel", "rev", "shape", "title"
});
} else {
renderPassThruAttributes(facesContext, linkButton, PASSTHROUGH_ATTRIBUTES);
}
if (!disabled) {
encodeScript(facesContext, writer, HTML.ONFOCUS_ATTR,
linkButton, uiParams, clientId, doAction);
if (null != linkButton.getHref()){
encodeHref(linkButton, writer, uiParams);
}
} else
writer.writeAttribute(HTML.CLASS_ATTR, "ui-state-disabled", null);
writer.write(value);
writer.endElement(HTML.ANCHOR_ELEM);
writer.startElement(HTML.SCRIPT_ELEM, null);
writer.writeAttribute(HTML.TYPE_ATTR, "text/javascript", null);
//assign ID here so that focus manager can focus the link but ID assigning will not interfere with the DOM updates
writer.writeText("document.getElementById('" + clientId + "').getElementsByTagName('a')[0].id = '" + clientId + "_link';", null);
if (disabled) {
// remove passthrough attributes added with the uiParams) throws IOException {
String target = linkButton.getTarget();
String hrefLang = linkButton.getHrefLang();
String href = linkButton.getHref();
String paramString = uiParams != null
? "?"+ Utils.asParameterString(uiParams)
: "";
if (href != null) {
href += paramString;
writer.writeAttribute(HTML.HREF_ATTR, href, null );
}
if (hrefLang != null) {
writer.writeAttribute(HTML.HREFLANG_ATTR, hrefLang , null );
}
if (target != null) {
writer.writeAttribute(HTML.TARGET_ATTR, target, null );
}
}
private void encodeRootStyle(LinkButton linkButton, ResponseWriter writer) throws IOException {
String styleClass = linkButton.getStyleClass();
String styleClassVal = "";
if (styleClass != null && styleClass.trim().length() > 0) {
styleClassVal = " " + styleClass;
}
writer.writeAttribute(HTML.CLASS_ATTR, "ice-linkbutton" + styleClassVal, null);
}
private String getScript(FacesContext facesContext, ResponseWriter writer,
LinkButton linkButton,
List uiParams, String clientId,
boolean doAction) throws IOException {
JSONBuilder json = JSONBuilder.create()
.beginFunction("ice.ace.lazy")
.item("linkButton")
.beginArray()
.item(clientId)
.beginMap()
.entry("hasAction", doAction);
encodeClientBehaviors(facesContext, linkButton, json);
if (doAction && uiParams != null) {
json.beginMap("uiParams");
for (UIParameter param : uiParams){
Object temp = param.getValue() ==null ? null : param.getValue();
if (null != temp){
json.entryNonNullValue(param.getName(), temp);
} }
json.endMap();
}
String type = linkButton.getType();
if ("clear".equalsIgnoreCase(type)) {
UIComponent parentForm = ComponentUtils.findParentForm(facesContext, linkButton);
if (parentForm != null) {
json.entry("clear", parentForm.getClientId(facesContext));
}
} else if ("reset".equalsIgnoreCase(type)) {
UIComponent parentForm = ComponentUtils.findParentForm(facesContext, linkButton);
if (parentForm != null) {
json.entry("reset", parentForm.getClientId(facesContext));
}
}
json.endMap().endArray().endFunction();
return json.toString();
}
private void encodeScript(FacesContext facesContext, ResponseWriter writer,
String eventAttr, LinkButton linkButton,
List uiParams, String clientId,
boolean doAction) throws IOException {
String value = "if (!document.getElementById('" + clientId + "').widget) " + getScript(facesContext, writer, linkButton, uiParams, clientId, doAction);
Object passthroughValue = linkButton.getAttributes().get(eventAttr);
if (passthroughValue != null) {
value = value + "; " + passthroughValue;
}
writer.writeAttribute(eventAttr, value, null);
}
}