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package moe.nea.firmament.init;
import me.shedaniel.mm.api.ClassTinkerers;
import net.minecraft.client.gui.components.events.AbstractContainerEventHandler;
import net.minecraft.client.gui.components.events.GuiEventListener;
import net.minecraft.client.gui.screens.Screen;
import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
import net.minecraft.client.input.CharacterEvent;
import net.minecraft.client.input.KeyEvent;
import net.minecraft.client.input.MouseButtonEvent;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.InsnList;
import org.objectweb.asm.tree.InsnNode;
import org.objectweb.asm.tree.JumpInsnNode;
import org.objectweb.asm.tree.LabelNode;
import org.objectweb.asm.tree.LdcInsnNode;
import org.objectweb.asm.tree.MethodInsnNode;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.VarInsnNode;
import java.lang.reflect.Modifier;
import java.util.function.Consumer;
public class HandledScreenRiser extends RiserUtils {
Intermediary.InterClass Screen = Intermediary.<Screen>intermediaryClass();
Intermediary.InterClass KeyInput = Intermediary.<KeyEvent>intermediaryClass();
Intermediary.InterClass CharInput = Intermediary.<CharacterEvent>intermediaryClass();
Intermediary.InterClass HandledScreen = Intermediary.<AbstractContainerScreen>intermediaryClass();
Intermediary.InterClass AbstractContainerEventHandler = Intermediary.<AbstractContainerEventHandler>intermediaryClass();
Intermediary.InterClass MouseButtonEvent = Intermediary.<MouseButtonEvent>intermediaryClass();
Intermediary.InterMethod mouseScrolled = Intermediary.intermediaryMethod(
GuiEventListener::mouseScrolled,
Intermediary.ofClass(boolean.class),
Intermediary.ofClass(double.class),
Intermediary.ofClass(double.class),
Intermediary.ofClass(double.class),
Intermediary.ofClass(double.class)
);
Intermediary.InterMethod mouseClickedScreen = Intermediary.intermediaryMethod(
//onMouseClicked$firmament
GuiEventListener::mouseClicked,
Intermediary.ofClass(boolean.class),
MouseButtonEvent,
Intermediary.ofClass(boolean.class)
);
;
Intermediary.InterMethod keyReleased = Intermediary.intermediaryMethod(
GuiEventListener::keyReleased,
Intermediary.ofClass(boolean.class),
KeyInput
);
Intermediary.InterMethod charTyped = Intermediary.intermediaryMethod(
GuiEventListener::charTyped,
Intermediary.ofClass(boolean.class),
CharInput
);
@Override
public void addTinkerers() {
addTransformation(HandledScreen, this::addMouseScroll, true);
addTransformation(HandledScreen, this::addKeyReleased, true);
addTransformation(HandledScreen, this::addCharTyped, true);
addTransformation(Screen, this::addMouseClicked, true);
}
/**
* Insert a handler that roughly inserts the following code at the beginning of the instruction list:
* <code><pre>
* if (insertInvoke(insertLoads)) return true
* </pre></code>
*
* @param node The method node to prepend the instructions to
* @param insertLoads insert all the loads, including the {@code this} parameter
* @param insertInvoke insert the invokevirtual/invokestatic call
*/
void insertTrueHandler(MethodNode node,
Consumer<InsnList> insertLoads,
Consumer<InsnList> insertInvoke) {
var insns = new InsnList();
insertLoads.accept(insns);
insertInvoke.accept(insns);
// Create jump target (but not insert it yet)
var jumpIfFalse = new LabelNode();
// IFEQ (if returned boolean == 0), jump to jumpIfFalse
insns.add(new JumpInsnNode(Opcodes.IFEQ, jumpIfFalse));
// LDC 1 (as int, which is what booleans are at runtime)
insns.add(new LdcInsnNode(1));
// IRETURN return int on stack (booleans are int at runtime)
insns.add(new InsnNode(Opcodes.IRETURN));
insns.add(jumpIfFalse);
node.instructions.insert(insns);
}
void addKeyReleased(ClassNode classNode) {
addSuperInjector(
classNode, keyReleased.mapped(), keyReleased.mappedDesc(), HandledScreen, Screen, "keyReleased_firmament",
insns -> {
// ALOAD 0, load this
insns.add(new VarInsnNode(Opcodes.ALOAD, 0));
// ALOAD 1, load args
insns.add(new VarInsnNode(Opcodes.ALOAD, 1));
});
}
void addMouseClicked(ClassNode classNode) {
addSuperInjector(
classNode, mouseClickedScreen.mapped(), mouseClickedScreen.mappedDesc(),
Screen, AbstractContainerEventHandler, "onMouseClicked$firmament",
insns -> {
// load this
insns.add(new VarInsnNode(Opcodes.ALOAD, 0));
// load mouse event
insns.add(new VarInsnNode(Opcodes.ALOAD, 1));
// load doubled
insns.add(new VarInsnNode(Opcodes.ILOAD, 2));
}
);
}
void addCharTyped(ClassNode classNode) {
addSuperInjector(
classNode, charTyped.mapped(), charTyped.mappedDesc(),
HandledScreen, Screen, "charTyped_firmament",
insns -> {
// ALOAD 0, load this
insns.add(new VarInsnNode(Opcodes.ALOAD, 0));
// ALOAD 1, load args
insns.add(new VarInsnNode(Opcodes.ALOAD, 1));
});
}
void addSuperInjector(
ClassNode classNode,
String name,
Type desc,
Intermediary.InterClass currentClass,
Intermediary.InterClass parentClass,
String firmamentName,
Consumer<InsnList> loadArgs
) {
var keyReleasedNode = findMethod(classNode, name, desc);
if (keyReleasedNode == null) {
keyReleasedNode = new MethodNode(
Modifier.PUBLIC,
name,
desc.getDescriptor(),
null,
new String[0]
);
var insns = keyReleasedNode.instructions;
loadArgs.accept(insns);
// INVOKESPECIAL call super method
insns.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, parentClass.mapped().getInternalName(),
name, desc.getDescriptor()));
// IRETURN return int on stack (booleans are int at runtime)
insns.add(new InsnNode(Opcodes.IRETURN));
classNode.methods.add(keyReleasedNode);
}
insertTrueHandler(keyReleasedNode, loadArgs, insns -> {
// INVOKEVIRTUAL call custom handler
insns.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL,
currentClass.mapped().getInternalName(),
firmamentName,
desc.getDescriptor()));
});
}
void addMouseScroll(ClassNode classNode) {
addSuperInjector(
classNode, mouseScrolled.mapped(), mouseScrolled.mappedDesc(), HandledScreen, Screen, "mouseScrolled_firmament",
insns -> {
// ALOAD 0, load this
insns.add(new VarInsnNode(Opcodes.ALOAD, 0));
// DLOAD 1-4, load the 4 argument doubles. Note that since doubles are two entries wide we skip 2 each time.
insns.add(new VarInsnNode(Opcodes.DLOAD, 1));
insns.add(new VarInsnNode(Opcodes.DLOAD, 3));
insns.add(new VarInsnNode(Opcodes.DLOAD, 5));
insns.add(new VarInsnNode(Opcodes.DLOAD, 7));
});
}
}
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