feat: copy chat messages (#155)

Co-authored-by: Linnea Gräf <nea@nea.moe>

src/main/java/moe/nea/firmament/mixins/CopyChatPatch.java

@@ -0,0 +1,44 @@
+package moe.nea.firmament.mixins;
+
+import moe.nea.firmament.features.chat.CopyChat;
+import moe.nea.firmament.mixins.accessor.AccessorChatHud;
+import moe.nea.firmament.util.ClipboardUtils;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.hud.ChatHud;
+import net.minecraft.client.gui.hud.ChatHudLine;
+import net.minecraft.client.gui.screen.ChatScreen;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import net.minecraft.util.math.MathHelper;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import java.util.List;
+
+@Mixin(ChatScreen.class)
+public class CopyChatPatch {
+	@Inject(method = "mouseClicked", at = @At("HEAD"), cancellable = true)
+	private void onRightClick(double mouseX, double mouseY, int button, CallbackInfoReturnable<Boolean> cir) throws NoSuchFieldException, IllegalAccessException {
+		if (button != 1 || !CopyChat.TConfig.INSTANCE.getCopyChat()) return;
+		MinecraftClient client = MinecraftClient.getInstance();
+		ChatHud chatHud = client.inGameHud.getChatHud();
+		int lineIndex = getChatLineIndex(chatHud, mouseY);
+		if (lineIndex < 0) return;
+		List<ChatHudLine.Visible> visible = ((AccessorChatHud) chatHud).getVisibleMessages_firmament();
+		if (lineIndex >= visible.size()) return;
+		ChatHudLine.Visible line = visible.get(lineIndex);
+		String text = CopyChat.INSTANCE.orderedTextToString(line.content());
+		ClipboardUtils.INSTANCE.setTextContent(text);
+		chatHud.addMessage(Text.literal("Copied: ").append(text).formatted(Formatting.GRAY));
+		cir.setReturnValue(true);
+		cir.cancel();
+	}
+
+	@Unique
+	private int getChatLineIndex(ChatHud chatHud, double mouseY) {
+		double chatLineY = ((AccessorChatHud) chatHud).toChatLineY_firmament(mouseY);
+		return MathHelper.floor(chatLineY + ((AccessorChatHud) chatHud).getScrolledLines_firmament());
+	}
+}

src/main/java/moe/nea/firmament/mixins/accessor/AccessorChatHud.java

@@ -4,6 +4,7 @@ import net.minecraft.client.gui.hud.ChatHud;
 import net.minecraft.client.gui.hud.ChatHudLine;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
 
 import java.util.List;
 
@@ -11,4 +12,13 @@ import java.util.List;
 public interface AccessorChatHud {
 	@Accessor("messages")
 	List<ChatHudLine> getMessages_firmament();
+
+	@Accessor("visibleMessages")
+	List<ChatHudLine.Visible> getVisibleMessages_firmament();
+
+	@Accessor("scrolledLines")
+	int getScrolledLines_firmament();
+
+	@Invoker("toChatLineY")
+	double toChatLineY_firmament(double y);
 }

src/main/kotlin/features/chat/CopyChat.kt

@@ -0,0 +1,25 @@
+package moe.nea.firmament.features.chat
+
+import net.minecraft.text.OrderedText
+import moe.nea.firmament.features.FirmamentFeature
+import moe.nea.firmament.gui.config.ManagedConfig
+import moe.nea.firmament.util.reconstitute
+
+
+object CopyChat : FirmamentFeature {
+	override val identifier: String
+		get() = "copy-chat"
+
+	object TConfig : ManagedConfig(identifier, Category.CHAT) {
+		val copyChat by toggle("copy-chat") { false }
+	}
+
+	override val config: ManagedConfig?
+		get() = TConfig
+
+	fun orderedTextToString(orderedText: OrderedText): String {
+		return orderedText.reconstitute().string
+	}
+
+
+}