/*
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* Copyright 2012 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.wicket.panels;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.wicket.PageParameters;
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import org.apache.wicket.markup.html.panel.Panel;
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import org.apache.wicket.markup.repeater.Item;
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import org.apache.wicket.markup.repeater.data.DataView;
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import org.apache.wicket.markup.repeater.data.ListDataProvider;
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import com.gitblit.wicket.WicketUtils;
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import com.gitblit.wicket.pages.BasePage;
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public class PagerPanel extends Panel {
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private static final long serialVersionUID = 1L;
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public PagerPanel(String wicketId, final int currentPage, final int totalPages,
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final Class<? extends BasePage> pageClass, final PageParameters baseParams) {
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super(wicketId);
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List<PageObject> pages = new ArrayList<PageObject>();
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int[] deltas;
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if (currentPage == 1) {
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// [1], 2, 3, 4, 5
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deltas = new int[] { 0, 1, 2, 3, 4 };
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} else if (currentPage == 2) {
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// 1, [2], 3, 4, 5
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deltas = new int[] { -1, 0, 1, 2, 3 };
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} else {
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// 1, 2, [3], 4, 5
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deltas = new int[] { -2, -1, 0, 1, 2 };
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}
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if (totalPages > 0) {
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pages.add(new PageObject("\u2190", currentPage - 1));
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}
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for (int delta : deltas) {
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int page = currentPage + delta;
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if (page > 0 && page <= totalPages) {
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pages.add(new PageObject("" + page, page));
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}
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}
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if (totalPages > 0) {
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pages.add(new PageObject("\u2192", currentPage + 1));
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}
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ListDataProvider<PageObject> pagesProvider = new ListDataProvider<PageObject>(pages);
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final DataView<PageObject> pagesView = new DataView<PageObject>("page", pagesProvider) {
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private static final long serialVersionUID = 1L;
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public void populateItem(final Item<PageObject> item) {
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PageObject pageItem = item.getModelObject();
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PageParameters pageParams = new PageParameters(baseParams);
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pageParams.put("pg", pageItem.page);
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LinkPanel link = new LinkPanel("pageLink", null, pageItem.text, pageClass, pageParams);
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link.setRenderBodyOnly(true);
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item.add(link);
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if (pageItem.page == currentPage || pageItem.page < 1 || pageItem.page > totalPages) {
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WicketUtils.setCssClass(item, "disabled");
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}
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}
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};
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add(pagesView);
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}
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private class PageObject implements Serializable {
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private static final long serialVersionUID = 1L;
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String text;
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int page;
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PageObject(String text, int page) {
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this.text = text;
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this.page = page;
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}
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}
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}
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