fix(android): preserve existing input hook

Author: iidamie

StArray.ModManager.Android/UI/ImGuiInputHandler.cs

@@ -1,3 +1,4 @@
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using ImGuiNET;
 using StArray.ModManager.Android.Native;
@@ -67,42 +68,88 @@ public static void InstallInputHooks()
         IsInitialized = true;
     }
 
-    /// <summary>在 Android 输入消费完成后读取本次输出事件。</summary>
-    [NativeHook("libinput.so", "_ZN7android13InputConsumer7consumeEPNS_26InputEventFactoryInterfaceEblPjPPNS_10InputEventE",
-        Convention = CallingConvention.Cdecl)]
-    public unsafe static int OnConsume(
-        void* thiz,
-        void* factory,
-        bool consumeBatches,
-        long frameTime,
-        uint* outSeq,
-        void** outEvent)
+    /*
+    /// <summary>触摸事件 Hook 回调</summary>
+    [NativeHook("libinput.so","_ZN7android13InputConsumer14consumeSamplesEPNS_26InputEventFactoryInterfaceERNS0_5BatchEmPjPPNS_10InputEventE")]
+    public unsafe static long OnConsumeSamples(void* thiz,void* factory, IntPtr batch,
+        ulong count, uint* outSeq, void** outEvent)
     {
-        var result = OnConsumeOriginal(
-            thiz,
-            factory,
-            consumeBatches,
-            frameTime,
-            outSeq,
-            outEvent);
-        if (outEvent != null && *outEvent != null)
-            DispatchInputEvent(new IntPtr(*outEvent));
+        var result = OnConsumeSamplesOriginal(thiz,factory, batch, count, outSeq, outEvent);
+        if (IsInitialized && *outEvent != null) ImGuiImplAndroid.HandleInputEvent(new IntPtr(*outEvent));
         return result;
     }
-
-    /// <summary>
-    /// 把一个原生输入事件同时送往 ImGui 和 <see cref="InputEvents"/> 订阅方。
-    /// </summary>
-    /// <remarks>
-    /// 输入广播不依赖 ImGui 上下文是否已经初始化；这样异步输入 Mod 可以在
-    /// 菜单、暂停和非游玩阶段继续收到原始事件并自行决定是否消费。
-    /// </remarks>
-    private static void DispatchInputEvent(IntPtr inputEvent)
+    
+    [NativeHook("libinput.so","_ZN7android13InputConsumer7consumeEPNS_26InputEventFactoryInterfaceEblPjPPNS_10InputEventE")]
+    public unsafe static long OnConsume(void* thiz, void* factory, bool consumeBatches, ulong frameTime, uint* outSeq, void** outEvent)
     {
+        var result = OnConsumeOriginal(thiz, factory, consumeBatches, frameTime, outSeq, outEvent);
+        if (IsInitialized && *outEvent != null) ImGuiImplAndroid.HandleInputEvent(new IntPtr(*outEvent));
+        return result;
+    }*/
+    
+    [NativeHook("GetInitializeMotionEventAddress")]
+    public unsafe static bool OnInitializeMotionEvent(void* @event, void* message)
+    {
+        var result = OnInitializeMotionEventOriginal(@event, message);
+        var x = AndroidInput.AMotionEvent_getX(new(@event), 0);
+        var y = AndroidInput.AMotionEvent_getY(new(@event), 0);
         if (InputEvents.HasSubscribers)
-            InputEvents.RaiseFrom(inputEvent);
-        if (IsInitialized)
-            ImGuiImplAndroid.HandleInputEvent(inputEvent);
+            InputEvents.RaiseFrom(new IntPtr(@event));
+        ImGuiImplAndroid.HandleInputEvent(new IntPtr(@event));
+        return result;
+    }
+
+    private static nint GetInitializeMotionEventAddress()
+    {
+        byte?[] sig = NativeFuncResolver.ParseHexPattern(
+            "e8 0f 19 fc fd 7b 01 a9 fc 6f 02 a9 fa 67 03 a9 " +
+            "f8 5f 04 a9 f6 57 05 a9 f4 4f 06 a9 fd 43 00 91");
+        var r = new NativeFuncResolver("/system/lib64/libinput.so");
+        long rva = r.FindSymbolRva("_ZN7android13InputConsumer21initializeMotionEventEPNS_11MotionEventEPKNS_12InputMessageE");
+        try
+        {
+            if (rva < 0)
+            {
+                var text = r.TextBytes;
+                long textAddr = r.TextBaseAddress;
+                int pos = 0;
+                while ((pos = NativeFuncResolver.Search(text, sig, pos)) >= 0)
+                {
+                    int ctxEnd = Math.Min(pos + 60, text.Length);
+                    bool hasMrs = false, hasLdr = false;
+                    for (int j = pos + 32; j <= ctxEnd - 4; j += 4)
+                    {
+                        int inst = BitConverter.ToInt32(text.AsSpan(j));
+                        if (!hasMrs && (inst & 0xffffffe0) == 0xd53bd040)
+                            hasMrs = true;
+                        if (!hasLdr && (inst & 0xffe003e0) == 0xb9400020)
+                        {
+                            int imm12 = (inst >> 10) & 0xfff;
+                            if (imm12 * 4 == 0xc) hasLdr = true;
+                        }
+                        if (hasMrs && hasLdr) break;
+                    }
+                    if (hasMrs && hasLdr)
+                    {
+                        rva = textAddr + pos;
+                        if (pos >= 4)
+                        {
+                            int prev = BitConverter.ToInt32(text.AsSpan(pos - 4));
+                            if (prev == unchecked((int)0xd503233f)) rva -= 4;
+                        }
+                        break;
+                    }
+                    pos++;
+                }
+                if (rva < 0) throw new KeyNotFoundException("initializeMotionEvent not found by signature.");
+            }
+        }
+        catch (Exception ex)
+        {
+            Logger.Error(nameof(ImGuiInputHandler), ex.ToString());
+        }
+        r.Load();
+        return r.GetFuncPtr(rva);
     }
 
     private static JavaClass? s_utilsClass;