MapLoader.cs

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using Microsoft.Xna.Framework;
using System;
using System.Collections.Generic;
using Terraria.ID;
using Terraria.Localization;
using Terraria.Map;
 
namespace Terraria.ModLoader
{
    //todo: further documentation
    internal static class MapLoader
    {
        internal static bool initialized = false;
        internal static readonly IDictionary<ushort, IList<MapEntry>> tileEntries = new Dictionary<ushort, IList<MapEntry>>();
        internal static readonly IDictionary<ushort, IList<MapEntry>> wallEntries = new Dictionary<ushort, IList<MapEntry>>();
        internal static readonly IDictionary<ushort, Func<string, int, int, string>> nameFuncs =
            new Dictionary<ushort, Func<string, int, int, string>>();
        internal static readonly IDictionary<ushort, ushort> entryToTile = new Dictionary<ushort, ushort>();
        internal static readonly IDictionary<ushort, ushort> entryToWall = new Dictionary<ushort, ushort>();
 
        internal static int modTileOptions(ushort type) {
            return tileEntries[type].Count;
        }
 
        internal static int modWallOptions(ushort type) {
            return wallEntries[type].Count;
        }
        //make Terraria.Map.MapHelper.colorLookup internal
        //add internal modPosition field to Terraria.Map.MapHelper
        //near end of Terraria.Map.MapHelper.Initialize set modPosition to num11 + 1
        //in Terraria.Map.MapHelper.SaveMap add mod-type-check to darkness check
        internal static void SetupModMap() {
            if (Main.dedServ) {
                return;
            }
            Array.Resize(ref MapHelper.tileLookup, TileLoader.TileCount);
            Array.Resize(ref MapHelper.wallLookup, WallLoader.WallCount);
            IList<Color> colors = new List<Color>();
            IList<LocalizedText> names = new List<LocalizedText>();
            foreach (ushort type in tileEntries.Keys) {
                MapHelper.tileLookup[type] = (ushort)(MapHelper.modPosition + colors.Count);
                foreach (MapEntry entry in tileEntries[type]) {
                    ushort mapType = (ushort)(MapHelper.modPosition + colors.Count);
                    entryToTile[mapType] = type;
                    nameFuncs[mapType] = entry.getName;
                    colors.Add(entry.color);
                    if (entry.name != null) {
                        names.Add(entry.name);
                    }
                    else {
                        names.Add(Language.GetText(entry.translation.Key));
                    }
                }
            }
            foreach (ushort type in wallEntries.Keys) {
                MapHelper.wallLookup[type] = (ushort)(MapHelper.modPosition + colors.Count);
                foreach (MapEntry entry in wallEntries[type]) {
                    ushort mapType = (ushort)(MapHelper.modPosition + colors.Count);
                    entryToWall[mapType] = type;
                    nameFuncs[mapType] = entry.getName;
                    colors.Add(entry.color);
                    if (entry.name != null) {
                        names.Add(entry.name);
                    }
                    else {
                        names.Add(Language.GetText(entry.translation.Key));
                    }
                }
            }
            Array.Resize(ref MapHelper.colorLookup, MapHelper.modPosition + colors.Count);
            Lang._mapLegendCache.Resize(MapHelper.modPosition + names.Count);
            for (int k = 0; k < colors.Count; k++) {
                MapHelper.colorLookup[MapHelper.modPosition + k] = colors[k];
                Lang._mapLegendCache[MapHelper.modPosition + k] = names[k];
            }
            initialized = true;
        }
 
        internal static void UnloadModMap() {
            tileEntries.Clear();
            wallEntries.Clear();
            if (Main.dedServ) {
                return;
            }
            nameFuncs.Clear();
            entryToTile.Clear();
            entryToWall.Clear();
            Array.Resize(ref MapHelper.tileLookup, TileID.Count);
            Array.Resize(ref MapHelper.wallLookup, WallID.Count);
            Array.Resize(ref MapHelper.colorLookup, MapHelper.modPosition);
            Lang._mapLegendCache.Resize(MapHelper.modPosition);
            initialized = false;
        }
        //at end of Terraria.Map.MapHelper.CreateMapTile before returning call
        //  MapLoader.ModMapOption(ref num16, i, j);
        internal static void ModMapOption(ref ushort mapType, int i, int j) {
            if (entryToTile.ContainsKey(mapType)) {
                ModTile tile = TileLoader.GetTile(entryToTile[mapType]);
                ushort option = tile.GetMapOption(i, j);
                if (option < 0 || option >= modTileOptions(tile.Type)) {
                    throw new ArgumentOutOfRangeException("Bad map option for tile " + tile.Name + " from mod " + tile.mod.Name);
                }
                mapType += option;
            }
            else if (entryToWall.ContainsKey(mapType)) {
                ModWall wall = WallLoader.GetWall(entryToWall[mapType]);
                ushort option = wall.GetMapOption(i, j);
                if (option < 0 || option >= modWallOptions(wall.Type)) {
                    throw new ArgumentOutOfRangeException("Bad map option for wall " + wall.Name + " from mod " + wall.mod.Name);
                }
                mapType += option;
            }
        }
    }
}