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HologramTrait.java
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HologramTrait.java
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package net.citizensnpcs.trait;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
import org.bukkit.inventory.ItemStack;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import net.citizensnpcs.Settings.Setting;
import net.citizensnpcs.api.CitizensAPI;
import net.citizensnpcs.api.command.Arg.CompletionsProvider;
import net.citizensnpcs.api.command.CommandContext;
import net.citizensnpcs.api.npc.MemoryNPCDataStore;
import net.citizensnpcs.api.npc.NPC;
import net.citizensnpcs.api.npc.NPCRegistry;
import net.citizensnpcs.api.persistence.Persist;
import net.citizensnpcs.api.trait.Trait;
import net.citizensnpcs.api.trait.TraitName;
import net.citizensnpcs.api.util.DataKey;
import net.citizensnpcs.api.util.Messaging;
import net.citizensnpcs.api.util.Placeholders;
import net.citizensnpcs.api.util.SpigotUtil;
import net.citizensnpcs.util.NMS;
import net.citizensnpcs.util.Util;
/**
* Manages a set of <em>holograms</em> attached to the NPC. Holograms are lines of text or items that follow the NPC at
* some offset (typically vertically offset).
*/
// TODO: refactor this class
@TraitName("hologramtrait")
public class HologramTrait extends Trait {
private Location currentLoc;
private BiFunction<String, Player, String> customHologramSupplier;
private double lastEntityHeight = 0;
private boolean lastNameplateVisible;
@Persist
private double lineHeight = -1;
private final List<HologramLine> lines = Lists.newArrayList();
private HologramLine nameLine;
private final NPCRegistry registry = CitizensAPI.createCitizensBackedNPCRegistry(new MemoryNPCDataStore());
private int t;
private boolean useDisplayEntities = Setting.DISPLAY_ENTITY_HOLOGRAMS.asBoolean();
public HologramTrait() {
super("hologramtrait");
}
/**
* Adds a new hologram line which will displayed over an NPC's head.
*
* @param text
* The new line to add
*/
public void addLine(String text) {
lines.add(new HologramLine(text, true));
reloadLineHolograms();
}
/**
* Adds a new hologram line which will displayed over an NPC's head. It will not persist to disk and will last for
* the specified amount of ticks.
*
* @param text
* The new line to add
* @param ticks
* The number of ticks to last for
*/
public void addTemporaryLine(String text, int ticks) {
lines.add(new HologramLine(text, false, ticks));
reloadLineHolograms();
}
/**
* Clears all hologram lines
*/
public void clear() {
for (HologramLine line : lines) {
line.removeNPC();
}
lines.clear();
}
@SuppressWarnings("deprecation")
private NPC createHologram(String line, double heightOffset) {
NPC hologramNPC = null;
if (useDisplayEntities) {
hologramNPC = registry.createNPC(EntityType.INTERACTION, line);
hologramNPC.addTrait(new ClickRedirectTrait(npc));
hologramNPC.data().set(NPC.Metadata.NAMEPLATE_VISIBLE, true);
hologramNPC.getOrAddTrait(MountTrait.class).setMountedOn(npc.getUniqueId());
} else {
hologramNPC = registry.createNPC(EntityType.ARMOR_STAND, line);
hologramNPC.getOrAddTrait(ArmorStandTrait.class).setAsHelperEntityWithName(npc);
}
if (Setting.PACKET_HOLOGRAMS.asBoolean()) {
hologramNPC.addTrait(PacketNPC.class);
}
hologramNPC.data().set(NPC.Metadata.HOLOGRAM_FOR, npc.getUniqueId().toString());
hologramNPC.spawn(currentLoc.clone().add(0, getEntityHeight() + heightOffset, 0));
Matcher itemMatcher = ITEM_MATCHER.matcher(line);
if (itemMatcher.matches()) {
Material item = SpigotUtil.isUsing1_13API() ? Material.matchMaterial(itemMatcher.group(1), false)
: Material.matchMaterial(itemMatcher.group(1));
ItemStack itemStack = new ItemStack(item, 1);
final NPC itemNPC = registry.createNPCUsingItem(EntityType.DROPPED_ITEM, "", itemStack);
itemNPC.data().setPersistent(NPC.Metadata.NAMEPLATE_VISIBLE, false);
if (itemMatcher.group(2) != null) {
if (itemMatcher.group(2).charAt(1) == '{') {
Bukkit.getUnsafe().modifyItemStack(itemStack, itemMatcher.group(2).substring(1));
itemNPC.setItemProvider(() -> itemStack);
} else {
itemNPC.getOrAddTrait(ScoreboardTrait.class)
.setColor(Util.matchEnum(ChatColor.values(), itemMatcher.group(2).substring(1)));
}
}
itemNPC.getOrAddTrait(MountTrait.class).setMountedOn(hologramNPC.getUniqueId());
itemNPC.spawn(currentLoc);
final NPC hn = hologramNPC;
itemNPC.addRunnable(() -> {
if (!itemNPC.isSpawned() || !hn.isSpawned()) {
itemNPC.destroy();
}
});
}
lastEntityHeight = getEntityHeight();
return hologramNPC;
}
private double getEntityHeight() {
return NMS.getHeight(npc.getEntity());
}
private double getHeight(int lineNumber) {
double base = (lastNameplateVisible ? 0 : -getLineHeight());
for (int i = 0; i <= lineNumber; i++) {
HologramLine line = lines.get(i);
base += line.mb + getLineHeight();
if (i != lineNumber) {
base += line.mt;
}
}
return base;
}
/**
* Note: this is implementation-specific and may be removed at a later date.
*/
public Collection<Entity> getHologramEntities() {
return lines.stream().filter(l -> l.hologram != null && l.hologram.getEntity() != null)
.map(l -> l.hologram.getEntity()).collect(Collectors.toList());
}
/**
* @return The line height between each hologram line, in blocks
*/
public double getLineHeight() {
return lineHeight == -1 ? Setting.DEFAULT_NPC_HOLOGRAM_LINE_HEIGHT.asDouble() : lineHeight;
}
/**
* @return the hologram lines, in bottom-up order
*/
public List<String> getLines() {
return Lists.transform(lines, l -> l.text);
}
/**
* Note: this is implementation-specific and may be removed at a later date.
*/
public Entity getNameEntity() {
return nameLine != null && nameLine.hologram.isSpawned() ? nameLine.hologram.getEntity() : null;
}
@Override
public void load(DataKey root) {
clear();
for (DataKey key : root.getRelative("lines").getIntegerSubKeys()) {
HologramLine line = new HologramLine(key.keyExists("text") ? key.getString("text") : key.getString(""),
true);
line.mt = key.keyExists("margin.top") ? key.getDouble("margin.top") : 0.0;
line.mb = key.keyExists("margin.bottom") ? key.getDouble("margin.bottom") : 0.0;
lines.add(line);
}
}
@Override
public void onDespawn() {
if (nameLine != null) {
nameLine.removeNPC();
nameLine = null;
}
for (HologramLine line : lines) {
line.removeNPC();
}
}
public void onHologramSeenByPlayer(NPC hologram, Player player) {
if (useDisplayEntities && npc.isSpawned()) {
double height = -1;
if (nameLine != null && hologram.equals(nameLine.hologram)) {
height = 0;
} else {
for (int i = 0; i < lines.size(); i++) {
if (hologram.equals(lines.get(i).hologram)) {
height = getHeight(i);
break;
}
}
}
if (height == -1)
return;
Messaging.debug(npc, "hologram interaction ", hologram.getEntity(), "height offset set to", height);
NMS.linkTextInteraction(player, hologram.getEntity(), npc.getEntity(), height);
}
}
@Override
public void onRemove() {
onDespawn();
}
@Override
public void onSpawn() {
if (!npc.isSpawned())
return;
lastNameplateVisible = Boolean
.parseBoolean(npc.data().<Object> get(NPC.Metadata.NAMEPLATE_VISIBLE, true).toString());
currentLoc = npc.getStoredLocation();
if (npc.requiresNameHologram() && lastNameplateVisible) {
nameLine = new HologramLine(npc.getRawName(), false);
nameLine.spawnNPC(0);
}
for (int i = 0; i < lines.size(); i++) {
lines.get(i).spawnNPC(getHeight(i));
}
}
private void reloadLineHolograms() {
for (HologramLine line : lines) {
line.removeNPC();
}
if (!npc.isSpawned())
return;
for (int i = 0; i < lines.size(); i++) {
lines.get(i).spawnNPC(getHeight(i));
}
}
/**
* Removes the line at the specified index
*
* @param idx
*/
public void removeLine(int idx) {
if (idx < 0 || idx >= lines.size())
return;
lines.remove(idx).removeNPC();
reloadLineHolograms();
}
@Override
public void run() {
if (!npc.isSpawned()) {
onDespawn();
return;
}
if (currentLoc == null) {
currentLoc = npc.getStoredLocation().clone();
}
boolean nameplateVisible = Boolean
.parseBoolean(npc.data().<Object> get(NPC.Metadata.NAMEPLATE_VISIBLE, true).toString());
if (npc.requiresNameHologram()) {
if (nameLine != null && !nameplateVisible) {
nameLine.removeNPC();
nameLine = null;
} else if (nameLine == null && nameplateVisible) {
nameLine = new HologramLine(npc.getRawName(), false);
nameLine.spawnNPC(0);
}
}
Location npcLoc = npc.getStoredLocation();
boolean updatePosition = Setting.HOLOGRAM_ALWAYS_UPDATE_POSITION.asBoolean()
|| currentLoc.getWorld() != npcLoc.getWorld() || currentLoc.distance(npcLoc) >= 0.001
|| lastNameplateVisible != nameplateVisible || Math.abs(lastEntityHeight - getEntityHeight()) >= 0.05;
boolean updateName = false;
if (t++ >= Setting.HOLOGRAM_UPDATE_RATE.asTicks() + Util.getFastRandom().nextInt(3) /* add some jitter */) {
t = 0;
updateName = true;
}
lastNameplateVisible = nameplateVisible;
if (updatePosition) {
currentLoc = npcLoc.clone();
lastEntityHeight = getEntityHeight();
}
if (nameLine != null && nameLine.hologram.isSpawned()) {
if (updatePosition && !useDisplayEntities) {
nameLine.hologram.teleport(npcLoc.clone().add(0, getEntityHeight(), 0), TeleportCause.PLUGIN);
}
if (updateName) {
nameLine.setText(npc.getRawName());
}
}
for (int i = 0; i < lines.size(); i++) {
HologramLine line = lines.get(i);
NPC hologramNPC = line.hologram;
if (hologramNPC == null || !hologramNPC.isSpawned())
continue;
if (line.ticks > 0 && --line.ticks == 0) {
line.removeNPC();
lines.remove(i--);
continue;
}
if (updatePosition && !useDisplayEntities) {
Location tp = npcLoc.clone().add(0, lastEntityHeight + getHeight(i), 0);
hologramNPC.teleport(tp, TeleportCause.PLUGIN);
}
String text = line.text;
if (ITEM_MATCHER.matcher(text).matches()) {
hologramNPC.data().set(NPC.Metadata.NAMEPLATE_VISIBLE, false);
continue;
}
if (!updateName)
continue;
line.setText(text);
}
}
@Override
public void save(DataKey root) {
root.removeKey("lines");
int i = 0;
for (HologramLine line : lines) {
if (!line.persist)
continue;
root.setString("lines." + i + ".text", line.text);
root.setDouble("lines." + i + ".margin.top", line.mt);
root.setDouble("lines." + i + ".margin.bottom", line.mb);
i++;
}
}
/**
* Sets the hologram line at a specific index
*
* @param idx
* The index
* @param text
* The new line
*/
public void setLine(int idx, String text) {
if (idx == lines.size()) {
addLine(text);
return;
}
HologramLine line = lines.get(idx);
line.setText(text);
if (line.hologram == null) {
reloadLineHolograms();
}
}
/**
* Sets the line height
*
* @see #getLineHeight()
* @param height
* The line height in blocks
*/
public void setLineHeight(double height) {
lineHeight = height;
reloadLineHolograms();
}
/**
* Sets the margin of a line at a specific index
*
* @param idx
* The index
* @param type
* The margin type, top or bottom
* @param margin
* The margin
*/
public void setMargin(int idx, String type, double margin) {
if (type.equalsIgnoreCase("top")) {
lines.get(idx).mt = margin;
} else if (type.equalsIgnoreCase("bottom")) {
lines.get(idx).mb = margin;
}
reloadLineHolograms();
}
/**
* Implementation-specific method: {@see NPC.Metadata#HOLOGRAM_LINE_SUPPLIER}
*/
public void setPerPlayerTextSupplier(BiFunction<String, Player, String> nameSupplier) {
this.customHologramSupplier = nameSupplier;
}
public void setUseDisplayEntities(boolean use) {
this.useDisplayEntities = use;
reloadLineHolograms();
}
private class HologramLine implements Function<Player, String> {
NPC hologram;
double mb, mt;
boolean persist;
String text;
int ticks;
public HologramLine(String text, boolean persist) {
this(text, persist, -1);
}
public HologramLine(String text, boolean persist, int ticks) {
setText(text);
this.persist = persist;
this.ticks = ticks;
if (ITEM_MATCHER.matcher(text).matches()) {
mb = 0.21;
mt = 0.07;
}
}
@Override
public String apply(Player viewer) {
return Placeholders.replace(text, viewer, npc);
}
public void removeNPC() {
if (hologram == null)
return;
hologram.destroy();
hologram = null;
}
public void setText(String text) {
this.text = text == null ? "" : text;
if (hologram != null) {
String name = Placeholders.replace(text, null, npc);
hologram.setName(name);
hologram.data().set(NPC.Metadata.NAMEPLATE_VISIBLE, ChatColor.stripColor(name).length() > 0);
if (Placeholders.containsPlayerPlaceholder(text)) {
hologram.data().set(NPC.Metadata.HOLOGRAM_LINE_SUPPLIER, this);
} else {
hologram.data().remove(NPC.Metadata.HOLOGRAM_LINE_SUPPLIER);
}
}
}
public void spawnNPC(double height) {
String name = Placeholders.replace(text, null, npc);
this.hologram = createHologram(name, height);
if (customHologramSupplier != null) {
hologram.data().set(NPC.Metadata.HOLOGRAM_LINE_SUPPLIER,
(Function<Player, String>) p -> customHologramSupplier.apply(text, p));
} else if (Placeholders.containsPlayerPlaceholder(text)) {
hologram.data().set(NPC.Metadata.HOLOGRAM_LINE_SUPPLIER, this);
}
}
}
public static class TabCompletions implements CompletionsProvider {
@Override
public Collection<String> getCompletions(CommandContext args, CommandSender sender, NPC npc) {
if (npc != null && LINE_ARGS.contains(args.getString(1).toLowerCase())) {
HologramTrait ht = npc.getOrAddTrait(HologramTrait.class);
return IntStream.range(0, ht.getLines().size()).mapToObj(Integer::toString)
.collect(Collectors.toList());
}
return Collections.emptyList();
}
private static final List<String> LINE_ARGS = ImmutableList.of("set", "remove", "margintop", "marginbottom");
}
private static final Pattern ITEM_MATCHER = Pattern.compile("<item:(.*?)([:].*?)?>");
}