Update for 7.0, part 1

2024-06-30 05:07:11 +02:00
parent 1acd532ef1
commit f76f0e91d0
20 changed files with 232 additions and 146 deletions
@@ -0,0 +1,98 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+using System.Text;
+using Dalamud.Game;
+using FFXIVClientStructs.FFXIV.Client.System.String;
+using FFXIVClientStructs.FFXIV.Client.UI;
+
+namespace ChatTwo.GameFunctions;
+
+// From: https://git.anna.lgbt/anna/XivCommon/src/branch/main/XivCommon/Functions/Chat.cs
+public class ChatCommon
+{
+    private static class Signatures
+    {
+        internal const string SendChat = "48 89 5C 24 ?? 57 48 83 EC 20 48 8B FA 48 8B D9 45 84 C9";
+    }
+
+    private delegate void ProcessChatBoxDelegate(IntPtr uiModule, IntPtr message, IntPtr unused, byte a4);
+    private ProcessChatBoxDelegate? ProcessChatBox { get; }
+
+    internal ChatCommon(ISigScanner scanner)
+    {
+        if (scanner.TryScanText(Signatures.SendChat, out var processChatBoxPtr))
+        {
+            ProcessChatBox = Marshal.GetDelegateForFunctionPointer<ProcessChatBoxDelegate>(processChatBoxPtr);
+        }
+    }
+
+    public unsafe void SendMessageUnsafe(byte[] message)
+    {
+        if (ProcessChatBox == null)
+            throw new InvalidOperationException("Could not find signature for chat sending");
+
+        var uiModule = (IntPtr)UIModule.Instance();
+
+        using var payload = new ChatPayload(message);
+        var mem1 = Marshal.AllocHGlobal(400);
+        Marshal.StructureToPtr(payload, mem1, false);
+
+        ProcessChatBox(uiModule, mem1, IntPtr.Zero, 0);
+
+        Marshal.FreeHGlobal(mem1);
+    }
+
+    public void SendMessage(string message)
+    {
+        var bytes = Encoding.UTF8.GetBytes(message);
+        if (bytes.Length == 0)
+            throw new ArgumentException("message is empty", nameof(message));
+
+        if (bytes.Length > 500)
+            throw new ArgumentException("message is longer than 500 bytes", nameof(message));
+
+        if (message.Length != SanitiseText(message).Length)
+            throw new ArgumentException("message contained invalid characters", nameof(message));
+
+        SendMessageUnsafe(bytes);
+    }
+
+    private static unsafe string SanitiseText(string text)
+    {
+        var uText = Utf8String.FromString(text);
+
+        uText->SanitizeString( 0x27F, Utf8String.CreateEmpty());
+
+        var sanitised = uText->ToString();
+        uText->Dtor();
+
+        return sanitised;
+    }
+
+    [StructLayout(LayoutKind.Explicit)]
+    [SuppressMessage("ReSharper", "PrivateFieldCanBeConvertedToLocalVariable")]
+    private readonly struct ChatPayload : IDisposable
+    {
+        [FieldOffset(0)] private readonly IntPtr textPtr;
+        [FieldOffset(16)] private readonly ulong textLen;
+        [FieldOffset(8)] private readonly ulong unk1;
+        [FieldOffset(24)] private readonly ulong unk2;
+
+        internal ChatPayload(byte[] stringBytes)
+        {
+            textPtr = Marshal.AllocHGlobal(stringBytes.Length + 30);
+            Marshal.Copy(stringBytes, 0, textPtr, stringBytes.Length);
+            Marshal.WriteByte(textPtr + stringBytes.Length, 0);
+
+            textLen = (ulong)(stringBytes.Length + 1);
+
+            unk1 = 64;
+            unk2 = 0;
+        }
+
+        public void Dispose()
+        {
+            Marshal.FreeHGlobal(textPtr);
+        }
+    }
+}