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/*
* Copyright 2012 gitblit.com.
*
* 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 com.gitblit.wicket.panels;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.apache.wicket.PageParameters;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.ListDataProvider;
import com.gitblit.wicket.WicketUtils;
import com.gitblit.wicket.pages.BasePage;
public class PagerPanel extends Panel {
private static final long serialVersionUID = 1L;
public PagerPanel(String wicketId, final int currentPage, final int totalPages,
final Class<? extends BasePage> pageClass, final PageParameters baseParams) {
super(wicketId);
List<PageObject> pages = new ArrayList<PageObject>();
int[] deltas;
if (currentPage == 1) {
// [1], 2, 3, 4, 5
deltas = new int[] { 0, 1, 2, 3, 4 };
} else if (currentPage == 2) {
// 1, [2], 3, 4, 5
deltas = new int[] { -1, 0, 1, 2, 3 };
} else {
// 1, 2, [3], 4, 5
deltas = new int[] { -2, -1, 0, 1, 2 };
}
if (totalPages > 0) {
pages.add(new PageObject("\u2190", currentPage - 1));
}
for (int delta : deltas) {
int page = currentPage + delta;
if (page > 0 && page <= totalPages) {
pages.add(new PageObject("" + page, page));
}
}
if (totalPages > 0) {
pages.add(new PageObject("\u2192", currentPage + 1));
}
ListDataProvider<PageObject> pagesProvider = new ListDataProvider<PageObject>(pages);
final DataView<PageObject> pagesView = new DataView<PageObject>("page", pagesProvider) {
private static final long serialVersionUID = 1L;
@Override
public void populateItem(final Item<PageObject> item) {
PageObject pageItem = item.getModelObject();
PageParameters pageParams = new PageParameters(baseParams);
pageParams.put("pg", pageItem.page);
LinkPanel link = new LinkPanel("pageLink", null, pageItem.text, pageClass, pageParams);
link.setRenderBodyOnly(true);
item.add(link);
if (pageItem.page == currentPage || pageItem.page < 1 || pageItem.page > totalPages) {
WicketUtils.setCssClass(item, "disabled");
}
}
};
add(pagesView);
}
private class PageObject implements Serializable {
private static final long serialVersionUID = 1L;
String text;
int page;
PageObject(String text, int page) {
this.text = text;
this.page = page;
}
}
}
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