private static IEnumerable <CodeInstruction> UpdateExplore_Transpiler(IEnumerable <CodeInstruction> instructions)
{
TranspilerState state = TranspilerState.Searching;
CodeInstruction previous = null;
foreach (CodeInstruction instruction in instructions)
{
switch (state)
{
case TranspilerState.Searching:
if (instruction.opcode == OpCodes.Ldarg_0)
{
previous = instruction;
state = TranspilerState.Checking;
}
else
{
yield return(instruction);
}
break;
case TranspilerState.Checking:
if (instruction.opcode == OpCodes.Ldfld && ((FieldInfo)instruction.operand).Name == nameof(Minimap.m_exploreRadius))
{
yield return(new CodeInstruction(OpCodes.Ldarg_2)); // player
yield return(new CodeInstruction(OpCodes.Call, typeof(Minimap_Patches).GetMethod(nameof(GetExploreRadius), BindingFlags.Static | BindingFlags.NonPublic)));
state = TranspilerState.Finishing;
}
else
{
yield return(previous);
yield return(instruction);
state = TranspilerState.Searching;
}
previous = null;
break;
case TranspilerState.Finishing:
yield return(instruction);
break;
}
}
}
private static IEnumerable <CodeInstruction> ApplyToHeightmap_Transpiler(IEnumerable <CodeInstruction> instructions)
{
TranspilerState state = TranspilerState.Searching;
CodeInstruction valueInstruction = null;
foreach (CodeInstruction instruction in instructions)
{
switch (state)
{
case TranspilerState.Searching:
if (instruction.opcode == OpCodes.Ldc_R4 && (float)instruction.operand == 8.0f)
{
valueInstruction = instruction;
state = TranspilerState.Replacing;
}
else
{
yield return(instruction);
}
break;
case TranspilerState.Replacing:
if (instruction.opcode == OpCodes.Sub)
{
valueInstruction.operand = MaximumDepth.Value;
}
else if (instruction.opcode == OpCodes.Add)
{
valueInstruction.operand = MaximumHeight.Value;
}
yield return(valueInstruction);
yield return(instruction);
valueInstruction = null;
state = TranspilerState.Searching;
break;
}
}
}
private static IEnumerable <CodeInstruction> Update_Transpiler(IEnumerable <CodeInstruction> instructions, ILGenerator generator)
{
LocalBuilder isSlashPressed = generator.DeclareLocal(typeof(bool));
isSlashPressed.SetLocalSymInfo(nameof(isSlashPressed));
Label label1 = generator.DefineLabel();
Label label2 = generator.DefineLabel();
yield return(new CodeInstruction(OpCodes.Ldc_I4_0));
yield return(new CodeInstruction(OpCodes.Stloc, isSlashPressed.LocalIndex));
TranspilerState state = TranspilerState.Searching;
foreach (CodeInstruction instruction in instructions)
{
if (state == TranspilerState.Inserting)
{
if (instruction.opcode != OpCodes.Brfalse)
{
throw new InvalidOperationException($"[BetterChat] {nameof(Chat_Slash_Patches)} encountered unexpected IL code. Unable to patch. This is most likely due to a game update changing the target code. Disable {nameof(SlashOpensChat)} in the config as a workaround until the mod can be fixed.");
}
// Previous instruction was checking if enter is pressed. If so, skip the slash key check (boolean OR).
yield return(new CodeInstruction(OpCodes.Brtrue, label1));
// Check for slash key if enter is not pressed. Also store the result of the check.
yield return(new CodeInstruction(OpCodes.Ldc_I4, (int)KeyCode.Slash));
yield return(new CodeInstruction(OpCodes.Call, typeof(Input).GetMethod(nameof(Input.GetKeyDown), new[] { typeof(KeyCode) })));
yield return(new CodeInstruction(OpCodes.Stloc, isSlashPressed.LocalIndex));
yield return(new CodeInstruction(OpCodes.Ldloc, isSlashPressed.LocalIndex));
state = TranspilerState.Labeling;
}
else if (state == TranspilerState.Labeling)
{
// Label this instruction as the one to jump to if the enter key is pressed (to skip the slash check).
instruction.labels.Add(label1);
state = TranspilerState.Searching2;
}
else if (state == TranspilerState.Labeling2)
{
// Label this instruction as the one to jump to when skipping the slash insertion code.
instruction.labels.Add(label2);
state = TranspilerState.Finishing;
}
yield return(instruction);
if (state == TranspilerState.Searching && instruction.opcode == OpCodes.Call)
{
MethodBase method = (MethodBase)instruction.operand;
if (method.Name == nameof(Input.GetKeyDown))
{
state = TranspilerState.Inserting;
}
}
else if (state == TranspilerState.Searching2 && instruction.opcode == OpCodes.Callvirt)
{
MethodBase method = (MethodBase)instruction.operand;
if (method.Name == nameof(InputField.ActivateInputField))
{
// If slash was not pressed (meaning enter was), then skip the block below
yield return(new CodeInstruction(OpCodes.Ldloc, isSlashPressed.LocalIndex));
yield return(new CodeInstruction(OpCodes.Brfalse, label2));
// If slash was pressed, replace current chat input string with a / character
yield return(new CodeInstruction(OpCodes.Ldarg_0));
yield return(new CodeInstruction(OpCodes.Ldfld, typeof(Chat).GetField(nameof(Chat.m_input))));
yield return(new CodeInstruction(OpCodes.Ldstr, "/"));
yield return(new CodeInstruction(OpCodes.Callvirt, typeof(InputField).GetMethod("set_text")));
// Move caret to end (after slash) in LateUpdate
yield return(new CodeInstruction(OpCodes.Ldc_I4_1));
yield return(new CodeInstruction(OpCodes.Stsfld, typeof(BetterChatPlugin).GetField(nameof(sMoveCaretToEnd), BindingFlags.Static | BindingFlags.NonPublic)));
state = TranspilerState.Labeling2;
}
}
}
}
