diff options
Diffstat (limited to 'src/main/kotlin')
| -rw-r--r-- | src/main/kotlin/skytils/skytilsmod/asm/SkytilsTransformer.kt | 1 | ||||
| -rw-r--r-- | src/main/kotlin/skytils/skytilsmod/asm/transformers/GuiNewChatTransformer.kt | 81 |
2 files changed, 82 insertions, 0 deletions
diff --git a/src/main/kotlin/skytils/skytilsmod/asm/SkytilsTransformer.kt b/src/main/kotlin/skytils/skytilsmod/asm/SkytilsTransformer.kt index 86b2ecf4..aeffb06c 100644 --- a/src/main/kotlin/skytils/skytilsmod/asm/SkytilsTransformer.kt +++ b/src/main/kotlin/skytils/skytilsmod/asm/SkytilsTransformer.kt @@ -50,6 +50,7 @@ class SkytilsTransformer : BaseClassTransformer() { injectSplashProgressTransformer() changeRenderedName() insertReceivePacketEvent() + injectNullCheck() } catch (e: Throwable) { e.printStackTrace() } diff --git a/src/main/kotlin/skytils/skytilsmod/asm/transformers/GuiNewChatTransformer.kt b/src/main/kotlin/skytils/skytilsmod/asm/transformers/GuiNewChatTransformer.kt new file mode 100644 index 00000000..b0ff830a --- /dev/null +++ b/src/main/kotlin/skytils/skytilsmod/asm/transformers/GuiNewChatTransformer.kt @@ -0,0 +1,81 @@ +/* + * Skytils - Hypixel Skyblock Quality of Life Mod + * Copyright (C) 2021 Skytils + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published + * by the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +package skytils.skytilsmod.asm.transformers + +import dev.falsehonesty.asmhelper.dsl.instructions.InsnListBuilder +import dev.falsehonesty.asmhelper.dsl.instructions.JumpCondition +import dev.falsehonesty.asmhelper.dsl.modify +import org.objectweb.asm.Opcodes +import org.objectweb.asm.tree.* +import skytils.skytilsmod.utils.Utils + +fun injectNullCheck() = modify("net.minecraft.client.gui.GuiNewChat") { + classNode.methods.find { + Utils.equalsOneOf(it.name, "refreshChat", "b") && it.desc == "()V" + }?.apply { + var labelNode: LabelNode? = null + var incInsn: VarInsnNode? = null + for (insn in instructions) { + if (insn is LabelNode) { + var prev = insn.previous + var valid = true + for (i in 1..5) { + if (prev == null || !valid) { + valid = false + break + } + valid = when (i) { + 1 -> prev is VarInsnNode && prev.opcode == Opcodes.ISTORE + 2 -> prev.opcode == Opcodes.ISUB + 3 -> prev.opcode == Opcodes.ICONST_1 + 4 -> prev is MethodInsnNode && prev.owner == "java/util/List" && prev.name == "size" + 5 -> prev is FieldInsnNode && prev.opcode == Opcodes.GETFIELD && Utils.equalsOneOf( + prev.owner, + "net/minecraft/client/gui/GuiNewChat", + "avt" + ) && Utils.equalsOneOf(prev.name, "chatLines", "h") && prev.desc == "Ljava/util/List;" + else -> throw NotImplementedError() + } + prev = prev.previous + } + if (valid) { + labelNode = insn + incInsn = insn.previous as VarInsnNode + } + } + if (labelNode != null && incInsn != null && insn is VarInsnNode && insn.opcode == Opcodes.ASTORE) { + val temp = insn.previous?.previous?.previous?.previous ?: continue + if (temp.opcode == Opcodes.GETFIELD && temp is FieldInsnNode && Utils.equalsOneOf( + temp.owner, + "net/minecraft/client/gui/GuiNewChat", + "avt" + ) && Utils.equalsOneOf(temp.name, "chatLines", "h") && temp.desc == "Ljava/util/List;" + ) { + instructions.insert(insn, InsnListBuilder(this).apply { + aload(insn.`var`) + ifClause(JumpCondition.NON_NULL) { + insn(IincInsnNode(incInsn.`var`, -1)) + jump(JumpCondition.GOTO, labelNode) + } + }.build()) + } + } + } + } +}
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