Merged with released L2J-Unity files.

trunk/java/com/l2jmobius/gameserver/model/html/PageBuilder.java

@@ -0,0 +1,114 @@
+/*
+ * This file is part of the L2J Mobius project.
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jmobius.gameserver.model.html;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Objects;
+
+import com.l2jmobius.gameserver.model.html.formatters.DefaultFormatter;
+import com.l2jmobius.gameserver.model.html.pagehandlers.DefaultPageHandler;
+import com.l2jmobius.gameserver.model.html.styles.DefaultStyle;
+
+/**
+ * @author UnAfraid
+ * @param <T>
+ */
+public class PageBuilder<T>
+{
+	private final Collection<T> _elements;
+	private final int _elementsPerPage;
+	private final String _bypass;
+	private int _currentPage = 0;
+	private IPageHandler _pageHandler = DefaultPageHandler.INSTANCE;
+	private IBypassFormatter _formatter = DefaultFormatter.INSTANCE;
+	private IHtmlStyle _style = DefaultStyle.INSTANCE;
+	private IBodyHandler<T> _bodyHandler;
+	
+	private PageBuilder(Collection<T> elements, int elementsPerPage, String bypass)
+	{
+		_elements = elements;
+		_elementsPerPage = elementsPerPage;
+		_bypass = bypass;
+	}
+	
+	public PageBuilder<T> currentPage(int currentPage)
+	{
+		_currentPage = Math.max(currentPage, 0);
+		return this;
+	}
+	
+	public PageBuilder<T> bodyHandler(IBodyHandler<T> bodyHandler)
+	{
+		Objects.requireNonNull(bodyHandler, "Body Handler cannot be null!");
+		_bodyHandler = bodyHandler;
+		return this;
+	}
+	
+	public PageBuilder<T> pageHandler(IPageHandler pageHandler)
+	{
+		Objects.requireNonNull(pageHandler, "Page Handler cannot be null!");
+		_pageHandler = pageHandler;
+		return this;
+	}
+	
+	public PageBuilder<T> formatter(IBypassFormatter formatter)
+	{
+		Objects.requireNonNull(formatter, "Formatter cannot be null!");
+		_formatter = formatter;
+		return this;
+	}
+	
+	public PageBuilder<T> style(IHtmlStyle style)
+	{
+		Objects.requireNonNull(style, "Style cannot be null!");
+		_style = style;
+		return this;
+	}
+	
+	public PageResult build()
+	{
+		Objects.requireNonNull(_bodyHandler, "Body was not set!");
+		
+		final int pages = (_elements.size() / _elementsPerPage) + ((_elements.size() % _elementsPerPage) > 0 ? 1 : 0);
+		final StringBuilder pagerTemplate = new StringBuilder();
+		if (pages > 1)
+		{
+			_pageHandler.apply(_bypass, _currentPage, pages, pagerTemplate, _formatter, _style);
+		}
+		
+		if (_currentPage > pages)
+		{
+			_currentPage = pages - 1;
+		}
+		
+		final int start = Math.max(_elementsPerPage * _currentPage, 0);
+		final StringBuilder sb = new StringBuilder();
+		_bodyHandler.create(_elements, pages, start, _elementsPerPage, sb);
+		return new PageResult(pages, pagerTemplate, sb);
+	}
+	
+	public static <T> PageBuilder<T> newBuilder(Collection<T> elements, int elementsPerPage, String bypass)
+	{
+		return new PageBuilder<>(elements, elementsPerPage, bypass.trim());
+	}
+	
+	public static <T> PageBuilder<T> newBuilder(T[] elements, int elementsPerPage, String bypass)
+	{
+		return new PageBuilder<>(Arrays.asList(elements), elementsPerPage, bypass.trim());
+	}
+}