public static CodeMatcher AddLabel(this CodeMatcher codeMatcher, out Label label)
{
label = new Label();
codeMatcher.AddLabels(new[] { label });
return(codeMatcher);
}
static void PatchClearFromConstructionObstacles(CodeMatcher codeCursor, ILGenerator generator)
{
codeCursor.Start();
codeCursor.MatchForward(false,
new CodeMatch(OpCodes.Ldloc_1),
new CodeMatch(OpCodes.Ldloc_3),
new CodeMatch(OpCodes.Callvirt, AccessTools.PropertyGetter(typeof(List <GameObject>), nameof(List <GameObject> .Count))),
new CodeMatch(OpCodes.Ldc_I4_0),
new CodeMatch(OpCodes.Ceq),
new CodeMatch(OpCodes.And),
new CodeMatch(OpCodes.Stloc_1)
);
if (codeCursor.IsValid)
{
// Remove boolean result assignent as we are "moving" it to after obstacle highlighting block
var labels = codeCursor.Instruction.ExtractLabels();
codeCursor.RemoveInstructions(7);
codeCursor.AddLabels(labels);
codeCursor.MatchForward(true,
new CodeMatch(OpCodes.Ldloc_3),
new CodeMatch(OpCodes.Callvirt, AccessTools.PropertyGetter(typeof(List <GameObject>), nameof(List <GameObject> .Count))),
new CodeMatch(OpCodes.Ldc_I4_0),
new CodeMatch(OpCodes.Ble)
);
if (codeCursor.IsValid)
{
var countCondBranchOperand = (Label)codeCursor.Operand;
codeCursor.MatchForward(false, new CodeMatch(instruction => instruction.labels.Contains(countCondBranchOperand)));
if (codeCursor.IsValid)
{
labels = codeCursor.Instruction.ExtractLabels();
// Make it to allow construction by clearing contruction obstacles for boolean result assignment if destroying obstacles is enabled
var disabledDestroyObstaclesLabel = generator.DefineLabel();
codeCursor.InsertAndAdvance(
new CodeInstruction(OpCodes.Callvirt, AccessTools.PropertyGetter(typeof(Config), nameof(Config.Instance))).WithLabels(labels),
new CodeInstruction(OpCodes.Ldfld, AccessTools.Field(typeof(Config), nameof(Config.destroyLargerObstaclesOnConstruction))),
new CodeInstruction(OpCodes.Brfalse_S, disabledDestroyObstaclesLabel)
);
codeCursor.InsertAndAdvance(
new CodeInstruction(OpCodes.Ldloc_3),
new CodeInstruction(OpCodes.Call, AccessTools.Method($"{typeof(UpdateAllowedPatch)}:{nameof(ClearConstructionObstacles)}", new Type[] { typeof(List <GameObject>) }))
);
// Assign boolean result here (was before highlighting block)
codeCursor.InsertAndAdvance(
new CodeInstruction(OpCodes.Ldloc_1).WithLabels(disabledDestroyObstaclesLabel),
new CodeInstruction(OpCodes.Ldloc_3),
new CodeInstruction(OpCodes.Callvirt, AccessTools.PropertyGetter(typeof(List <GameObject>), nameof(List <GameObject> .Count))),
new CodeInstruction(OpCodes.Ldc_I4_0),
new CodeInstruction(OpCodes.Ceq),
new CodeInstruction(OpCodes.And),
new CodeInstruction(OpCodes.Stloc_1)
);
}
}
}
}