org.primefaces.mobile.renderkit.paginator.PageLinksRenderer Maven / Gradle / Ivy
/*
* 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.mobile.renderkit.paginator;
import java.io.IOException;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.component.api.Pageable;
import org.primefaces.component.paginator.PaginatorElementRenderer;
public class PageLinksRenderer implements PaginatorElementRenderer {
public void render(FacesContext context, Pageable pageable) throws IOException {
ResponseWriter writer = context.getResponseWriter();
int currentPage = pageable.getPage();
int pageLinks = pageable.getPageLinks();
int pageCount = pageable.getPageCount();
int visiblePages = Math.min(pageLinks, pageCount);
//calculate range, keep current in middle if necessary
int start = Math.max(0, (int) Math.ceil(currentPage - ((visiblePages) / 2)));
int end = Math.min(pageCount - 1, start + visiblePages - 1);
//check when approaching to last page
int delta = pageLinks - (end - start + 1);
start = Math.max(0, start - delta);
for(int i = start; i <= end; i++){
String styleClass = currentPage == i ? "ui-paginator-page ui-btn ui-btn-active" : "ui-paginator-page ui-btn";
writer.startElement("button", null);
writer.writeAttribute("class", styleClass, null);
writer.writeAttribute("type", "button", null);
writer.writeText((i + 1), null);
writer.endElement("button");
}
}
}