add smooth messages

2 files changed, 101 insertions, 10 deletions

diff --git a/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_ChatTabs.java b/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_ChatTabs.java
index 1d29941..d21097d 100644
--- a/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_ChatTabs.java
+++ b/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_ChatTabs.java
@@ -1,13 +1,11 @@
 package cc.woverflow.chatting.mixin;
 
-import cc.woverflow.chatting.chat.ChatSearchingManager;
 import cc.woverflow.chatting.chat.ChatTabs;
 import cc.woverflow.chatting.config.ChattingConfig;
 import cc.woverflow.chatting.utils.ModCompatHooks;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.ChatLine;
 import net.minecraft.client.gui.GuiNewChat;
-import net.minecraft.util.EnumChatFormatting;
 import net.minecraft.util.IChatComponent;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
@@ -17,24 +15,18 @@ import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 import java.util.List;
-import java.util.Locale;
 
-@Mixin(GuiNewChat.class)
+@Mixin(value = GuiNewChat.class, priority = 990)
 public abstract class GuiNewChatMixin_ChatTabs {
     @Shadow @Final private Minecraft mc;
 
     @Shadow public abstract void deleteChatLine(int id);
 
     @Shadow @Final private List<ChatLine> chatLines;
-    @SuppressWarnings({"FieldCanBeLocal", "unused"})
-    private float percentComplete; //betterchat support
 
     @Inject(method = "printChatMessageWithOptionalDeletion", at = @At("HEAD"), cancellable = true)
     private void handlePrintChatMessage(IChatComponent chatComponent, int chatLineId, CallbackInfo ci) {
         handleChatTabMessage(chatComponent, chatLineId, mc.ingameGUI.getUpdateCounter(), false, ci);
-        if (!EnumChatFormatting.getTextWithoutFormattingCodes(chatComponent.getUnformattedText()).toLowerCase(Locale.ENGLISH).contains(ChatSearchingManager.INSTANCE.getLastSearch().toLowerCase(Locale.ENGLISH))) {
-            percentComplete = 1.0F;
-        }
     }
 
     @Inject(method = "setChatLine", at = @At("HEAD"), cancellable = true)
@@ -45,7 +37,7 @@ public abstract class GuiNewChatMixin_ChatTabs {
     private void handleChatTabMessage(IChatComponent chatComponent, int chatLineId, int updateCounter, boolean displayOnly, CallbackInfo ci) {
         if (ChattingConfig.INSTANCE.getChatTabs()) {
             if (!ChatTabs.INSTANCE.shouldRender(chatComponent)) {
-                percentComplete = 1.0F;
+                ChatTabs.INSTANCE.setHasCancelledAnimation(true);
                 if (chatLineId != 0) {
                     deleteChatLine(chatLineId);
                 }
diff --git a/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_SmoothMessages.java b/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_SmoothMessages.java
new file mode 100644
index 0000000..a09fe0c
--- /dev/null
+++ b/src/main/java/cc/woverflow/chatting/mixin/GuiNewChatMixin_SmoothMessages.java
@@ -0,0 +1,99 @@
+package cc.woverflow.chatting.mixin;
+
+import cc.woverflow.chatting.chat.ChatSearchingManager;
+import cc.woverflow.chatting.chat.ChatTabs;
+import cc.woverflow.chatting.config.ChattingConfig;
+import net.minecraft.client.gui.GuiNewChat;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.util.EnumChatFormatting;
+import net.minecraft.util.IChatComponent;
+import net.minecraft.util.MathHelper;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+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.ModifyArg;
+import org.spongepowered.asm.mixin.injection.ModifyVariable;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.List;
+import java.util.Locale;
+
+@Mixin(GuiNewChat.class)
+public abstract class GuiNewChatMixin_SmoothMessages {
+    @Shadow
+    private boolean isScrolled;
+
+    @Shadow
+    public abstract float getChatScale();
+
+    private float chatting$percentComplete; //be nice and allow other mods to access this :)
+    @Unique
+    private int chatting$newLines;
+    @Unique
+    private long chatting$prevMillis = System.currentTimeMillis();
+    @Unique
+    private float chatting$animationPercent;
+    @Unique
+    private int chatting$lineBeingDrawn;
+
+    private void updatePercentage(long diff) {
+        if (chatting$percentComplete < 1) chatting$percentComplete += 0.004f * diff;
+        chatting$percentComplete = MathHelper.clamp_float(chatting$percentComplete, 0, 1);
+    }
+
+    @Inject(method = "drawChat", at = @At("HEAD"))
+    private void modifyChatRendering(CallbackInfo ci) {
+        long current = System.currentTimeMillis();
+        long diff = current - chatting$prevMillis;
+        chatting$prevMillis = current;
+        updatePercentage(diff);
+        float t = chatting$percentComplete;
+        chatting$animationPercent = MathHelper.clamp_float(1 - (--t) * t * t * t, 0, 1);
+    }
+
+    @Inject(method = "drawChat", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/renderer/GlStateManager;pushMatrix()V", ordinal = 0, shift = At.Shift.AFTER))
+    private void translate(CallbackInfo ci) {
+        float y = 0;
+        if (ChattingConfig.INSTANCE.getSmoothChat() && !this.isScrolled) {
+            y += (9 - 9 * chatting$animationPercent) * this.getChatScale();
+        }
+        GlStateManager.translate(0, y, 0);
+    }
+
+    @ModifyArg(method = "drawChat", at = @At(value = "INVOKE", target = "Ljava/util/List;get(I)Ljava/lang/Object;", ordinal = 0, remap = false), index = 0)
+    private int getLineBeingDrawn(int line) {
+        chatting$lineBeingDrawn = line;
+        return line;
+    }
+
+    @ModifyArg(method = "drawChat", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/gui/FontRenderer;drawStringWithShadow(Ljava/lang/String;FFI)I"), index = 3)
+    private int modifyTextOpacity(int original) {
+        if (ChattingConfig.INSTANCE.getSmoothChat() && chatting$lineBeingDrawn <= chatting$newLines) {
+            int opacity = (original >> 24) & 0xFF;
+            opacity *= chatting$animationPercent;
+            return (original & ~(0xFF << 24)) | (opacity << 24);
+        } else {
+            return original;
+        }
+    }
+
+    @Inject(method = "printChatMessageWithOptionalDeletion", at = @At("HEAD"))
+    private void resetPercentage(IChatComponent chatComponent, int chatLineId, CallbackInfo ci) {
+        if (!EnumChatFormatting.getTextWithoutFormattingCodes(chatComponent.getUnformattedText()).toLowerCase(Locale.ENGLISH).contains(ChatSearchingManager.INSTANCE.getLastSearch().toLowerCase(Locale.ENGLISH))) {
+            return;
+        }
+        if (ChatTabs.INSTANCE.getHasCancelledAnimation()) {
+            ChatTabs.INSTANCE.setHasCancelledAnimation(false);
+            return;
+        }
+        chatting$percentComplete = 0;
+    }
+
+    @ModifyVariable(method = "setChatLine", at = @At("STORE"), ordinal = 0)
+    private List<IChatComponent> setNewLines(List<IChatComponent> original) {
+        chatting$newLines = original.size() - 1;
+        return original;
+    }
+}