/*
* Copyright 2009-2014 PrimeTek.
*
* 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.primefaces.component.carousel;
import java.io.IOException;
import java.util.Map;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.WidgetBuilder;
public class CarouselRenderer extends CoreRenderer {
@Override
public void decode(FacesContext context, UIComponent component) {
Map<String,String> params = context.getExternalContext().getRequestParameterMap();
Carousel carousel = (Carousel) component;
String clientId = carousel.getClientId(context);
String firstParam = clientId + "_first";
if(params.containsKey(firstParam)) {
carousel.setFirstVisible(Integer.parseInt(params.get(firstParam)));
}
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
Carousel carousel = (Carousel) component;
encodeMarkup(context, carousel);
encodeScript(context, carousel);
}
private void encodeScript(FacesContext context, Carousel carousel) throws IOException{
String clientId = carousel.getClientId(context);
WidgetBuilder wb = getWidgetBuilder(context);
wb.init("Carousel", carousel.resolveWidgetVar(), clientId);
wb.attr("firstVisible", carousel.getFirstVisible(), 0)
.attr("circular", carousel.isCircular(), false)
.attr("vertical", carousel.isVertical(), false)
.attr("numVisible", carousel.getNumVisible(), 3)
.attr("autoplayInterval", carousel.getAutoPlayInterval(), 0)
.attr("dropDownTemplate", carousel.getDropdownTemplate(), null)
.attr("pageLinks", carousel.getPageLinks(), 3)
.attr("effect", carousel.getEffect(), null)
.attr("effectDuration", carousel.getEffectDuration(), Integer.MIN_VALUE)
.attr("easing", carousel.getEasing(), null);
wb.finish();
}
protected void encodeMarkup(FacesContext context, Carousel carousel) throws IOException {
ResponseWriter writer = context.getResponseWriter();
String clientId = carousel.getClientId(context);
String style = carousel.getStyle();
String styleClass = carousel.getStyleClass();
styleClass = (styleClass == null) ? Carousel.CONTAINER_CLASS : Carousel.CONTAINER_CLASS + " " + styleClass;
//container
writer.startElement("div", null);
writer.writeAttribute("id", clientId, null);
writer.writeAttribute("class", styleClass, null);
if(style != null)
writer.writeAttribute("style", style, "style");
encodeHeader(context, carousel);
encodeContent(context, carousel);
encodeFooter(context, carousel);
encodeStateField(context, carousel);
writer.endElement("div");
}
protected void encodeContent(FacesContext context, Carousel carousel) throws IOException {
ResponseWriter writer = context.getResponseWriter();
String itemStyleClass = carousel.getItemStyleClass();
itemStyleClass = itemStyleClass == null ? Carousel.ITEM_CLASS : Carousel.ITEM_CLASS + " " + itemStyleClass;
writer.startElement("div", null);
writer.writeAttribute("class", carousel.isVertical() ? Carousel.VERTICAL_VIEWPORT_CLASS : Carousel.VIEWPORT_CLASS, null);
writer.startElement("ul", null);
if(carousel.getVar() != null) {
for(int i=0; i < carousel.getRowCount(); i++) {
carousel.setRowIndex(i);
writer.startElement("li", null);
writer.writeAttribute("class", itemStyleClass, "itemStyleClass");
if(carousel.getItemStyle() != null)
writer.writeAttribute("style", carousel.getItemStyle(), "itemStyle");
renderChildren(context, carousel);
writer.endElement("li");
}
carousel.setRowIndex(-1); //clear
}
else {
for(UIComponent kid : carousel.getChildren()) {
if(kid.isRendered()) {
writer.startElement("li", null);
writer.writeAttribute("class", itemStyleClass, "itemStyleClass");
if(carousel.getItemStyle() != null)
writer.writeAttribute("style", carousel.getItemStyle(), "itemStyle");
renderChild(context, kid);
writer.endElement("li");
}
}
}
writer.endElement("ul");
writer.endElement("div");
}
protected void encodeHeader(FacesContext context, Carousel carousel) throws IOException {
ResponseWriter writer = context.getResponseWriter();
boolean vertical = carousel.isVertical();
int numVisible = carousel.getNumVisible();
int pageCount = carousel.getVar() != null ? (int) (Math.ceil(carousel.getRowCount() / (1d * numVisible))) : carousel.getRenderedChildCount();
writer.startElement("div", null);
writer.writeAttribute("class", Carousel.HEADER_CLASS, null);
//title
writer.startElement("div", null);
writer.writeAttribute("class", Carousel.HEADER_TITLE_CLASS, null);
UIComponent facet = carousel.getFacet("header");
String text = carousel.getHeaderText();
if(facet != null)
facet.encodeAll(context);
else if(text != null)
writer.write(text);
writer.endElement("div");
//next button
writer.startElement("span", null);
writer.writeAttribute("class", vertical ? Carousel.VERTICAL_NEXT_BUTTON : Carousel.HORIZONTAL_NEXT_BUTTON, null);
writer.endElement("span");
//prev button
writer.startElement("span", null);
writer.writeAttribute("class", vertical ? Carousel.VERTICAL_PREV_BUTTON : Carousel.HORIZONTAL_PREV_BUTTON, null);
writer.endElement("span");
//pageLinks
if(pageCount <= carousel.getPageLinks())
encodePageLinks(context, carousel, pageCount);
else
encodeDropDown(context, carousel, pageCount);
writer.endElement("div");
}
protected void encodePageLinks(FacesContext context, Carousel carousel, int pageCount) throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.startElement("div", null);
writer.writeAttribute("class", Carousel.PAGE_LINKS_CONTAINER_CLASS, null);
for(int i = 0; i < pageCount; i++) {
writer.startElement("a", null);
writer.writeAttribute("href", "#", null);
writer.writeAttribute("class", Carousel.PAGE_LINK_CLASS, null);
writer.endElement("a");
}
writer.endElement("div");
}
protected void encodeDropDown(FacesContext context, Carousel carousel, int pageCount) throws IOException {
ResponseWriter writer = context.getResponseWriter();
String template = carousel.getDropdownTemplate();
writer.startElement("select", null);
writer.writeAttribute("name", carousel.getClientId(context) + "_dropdown", null);
writer.writeAttribute("class", Carousel.DROPDOWN_CLASS, null);
for(int i = 0; i < pageCount; i++) {
writer.startElement("option", null);
writer.writeAttribute("value", i + 1, null);
writer.write(template.replaceAll("\\{page\\}", String.valueOf(i + 1)));
writer.endElement("option");
}
writer.endElement("select");
}
protected void encodeFooter(FacesContext context, Carousel carousel) throws IOException {
UIComponent facet = carousel.getFacet("footer");
String text = carousel.getFooterText();
if(facet == null && text == null)
return;
ResponseWriter writer = context.getResponseWriter();
writer.startElement("div", null);
writer.writeAttribute("class", Carousel.FOOTER_CLASS, null);
if(facet != null)
facet.encodeAll(context);
else if(text != null)
writer.write(text);
writer.endElement("div");
}
protected void encodeStateField(FacesContext context, Carousel carousel) throws IOException {
ResponseWriter writer = context.getResponseWriter();
String id = carousel.getClientId(context) + "_first";
writer.startElement("input", null);
writer.writeAttribute("id", id, null);
writer.writeAttribute("name", id, null);
writer.writeAttribute("type", "hidden", null);
writer.writeAttribute("value", carousel.getFirst(), null);
writer.endElement("input");
}
@Override
public boolean getRendersChildren() {
return true;
}
@Override
public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
//Rendering happens on encodeEnd
}
}