65 lines
1.9 KiB
Java
65 lines
1.9 KiB
Java
package de.butzlabben.inventory.pages;
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import de.butzlabben.inventory.OrcItem;
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import org.bukkit.entity.Player;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.stream.Collectors;
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/**
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* @author Butzlabben
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* @since 21.05.2018
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*/
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public class PageGUICreator<T> {
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private final int elementsPerPage;
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private List<InventoryPage> invpages;
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public PageGUICreator() {
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this(4 * 9);
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}
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public PageGUICreator(int elementsPerPage) {
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this.elementsPerPage = elementsPerPage;
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}
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public void create(String title, Collection<T> elements, ItemConverter<T> converter) {
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List<OrcItem> items = elements.stream().map(r -> converter.convert(r)).collect(Collectors.toList());
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if (items == null || items.size() == 0)
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return;
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int pages = (int) (Math.ceil((items.size() / (double) elementsPerPage) < 1 ? 1 : Math.ceil((double) items.size() / (double) elementsPerPage)));
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invpages = new ArrayList<>(pages);
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for (int i = 1; i < pages + 1; i++) {
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int start = i == 1 ? 0 : elementsPerPage * (i - 1);
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int end = items.size() < elementsPerPage * i ? items.size() : elementsPerPage * i;
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List<OrcItem> page = items.subList(start, end);
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InventoryPage invpage = new InventoryPage(title, i, pages);
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page.forEach(invpage::addItem);
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invpages.add(invpage);
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}
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for (int i = 0; i < invpages.size(); i++) {
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int beforeIndex = i == 0 ? invpages.size() - 1 : i - 1;
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int nextIndex = i == invpages.size() - 1 ? 0 : i + 1;
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invpages.get(i).before = invpages.get(beforeIndex);
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invpages.get(i).next = invpages.get(nextIndex);
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}
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}
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public void show(Player p) {
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p.openInventory(invpages.get(0).getInventory(p));
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}
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public List<InventoryPage> getInvPages() {
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return invpages;
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}
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}
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