Add DebugMessage capability

Mumfrey
1 parent 7739602f
Showing 3 changed files with 273 additions and 1 deletions
src/client/java/com/mumfrey/liteloader/client/mixin/MixinGuiOverlayDebug.java
src/client/resources/mixins.liteloader.client.json
src/main/java/com/mumfrey/liteloader/util/debug/DebugMessage.java
+/*
+ * This file is part of LiteLoader.
+ * Copyright (C) 2012-16 Adam Mummery-Smith
+ * All Rights Reserved.
+ */
+package com.mumfrey.liteloader.client.mixin;
+
+import java.util.List;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import com.mumfrey.liteloader.util.debug.DebugMessage;
+import com.mumfrey.liteloader.util.debug.DebugMessage.Position;
+
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.gui.GuiOverlayDebug;
+
+@Mixin(GuiOverlayDebug.class)
+public abstract class MixinGuiOverlayDebug extends Gui
+{
+    @Shadow protected abstract List<String> call();
+    
+    @Shadow protected abstract <T extends Comparable<T>> List<String> getDebugInfoRight();
+    
+    private boolean captureNextCall = false;
+    
+    @Inject(method = "renderDebugInfoLeft()V", at = @At(value = "HEAD"))
+    private void onRenderDebugInfoLeft(CallbackInfo ci)
+    {
+        this.captureNextCall = true;
+    }
+    
+    @Redirect(method = "renderDebugInfoLeft()V", at = @At(value = "INVOKE", target = "Ljava/util/List;size()I"))
+    private int getSize(List<String> list)
+    {
+        if (this.captureNextCall)
+        {
+            this.captureNextCall = false;
+            List<String> messages = DebugMessage.getMessages(Position.LEFT_BOTTOM);
+            if (messages != null)
+            {
+                list.addAll(messages);
+            }
+        }
+        
+        return list.size();
+    }
+    
+    @Redirect(method = "renderDebugInfoLeft()V", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/gui/GuiOverlayDebug;call()Ljava/util/List;"))
+    private List<String> onCall(GuiOverlayDebug self)
+    {
+        List<String> list = this.call();
+        
+        List<String> topMessages = DebugMessage.getMessages(Position.LEFT_TOP);
+        if (topMessages != null)
+        {
+            list.addAll(1, topMessages);
+        }
+        
+        List<String> midMessages = DebugMessage.getMessages(Position.LEFT_AFTER_INFO);
+        if (midMessages != null)
+        {
+            list.addAll(midMessages);
+        }
+        
+        return list;
+    }
+    
+    @Redirect(method = "renderDebugInfoRight(Lnet/minecraft/client/gui/ScaledResolution;)V", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/gui/GuiOverlayDebug;getDebugInfoRight()Ljava/util/List;"))
+    private <T extends Comparable<T>> List<String> onGetDebugInfoRight(GuiOverlayDebug self)
+    {
+        List<String> list = this.getDebugInfoRight();
+        
+        List<String> topMessages = DebugMessage.getMessages(Position.RIGHT_TOP);
+        if (topMessages != null)
+        {
+            list.addAll(0, topMessages);
+            list.add(null);
+        }
+        
+        List<String> bottomMessages = DebugMessage.getMessages(Position.RIGHT_BOTTOM);
+        if (bottomMessages != null)
+        {
+            list.add(null);
+            list.addAll(bottomMessages);
+        }
+        
+        return list;
+    }
+}
@@ -21,7 +21,8 @@
         "MixinSimpleReloadableResourceManager",
         "MixinSoundHandler",
         "MixinGuiTextField",
-        "MixinIntIdentityHashBiMap"
+        "MixinIntIdentityHashBiMap",
+        "MixinGuiOverlayDebug"
     ],
     "injectors": {
         "defaultRequire": 1
+/*
+ * This file is part of LiteLoader.
+ * Copyright (C) 2012-16 Adam Mummery-Smith
+ * All Rights Reserved.
+ */
+package com.mumfrey.liteloader.util.debug;
+
+import java.util.ArrayList;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableList.Builder;
+
+/**
+ * A debug screen message, only displayed on clients. Consumers can create 
+ * debug messages and then change them using the returned handle.
+ */
+public final class DebugMessage
+{
+    /**
+     * Position to display the debug message, relative to other debug info
+     */
+    public enum Position
+    {
+        /**
+         * At the top of the left column, immediately below the version string
+         */
+        LEFT_TOP,
+        
+        /**
+         * At the bottom of the left column, after the debug info and before
+         * the help text 
+         */
+        LEFT_AFTER_INFO,
+        
+        /**
+         * At the bottom of the left column, below the help text and prompt 
+         */
+        LEFT_BOTTOM,
+        
+        /**
+         * At the top of the right column, above the JVM details 
+         */
+        RIGHT_TOP,
+        
+        /**
+         * At the bottom of the right column 
+         */
+        RIGHT_BOTTOM;
+    }
+    
+    /**
+     * Map of positions to lists of messages
+     */
+    private static final Map<Position, List<DebugMessage>> messages = new EnumMap<DebugMessage.Position, List<DebugMessage>>(Position.class);
+    
+    /**
+     * Position for this message 
+     */
+    private final Position position;
+    
+    /**
+     * Message text, can be null though it is recommended to set the message to
+     * invisible to hide it. Null messages leave a blank line.
+     */
+    private String message;
+    
+    /**
+     * Current visible state
+     */
+    private boolean visible = true;
+
+    private DebugMessage(Position position, String message)
+    {
+        this.position = position;
+        this.message = message;
+    }
+    
+    /**
+     * Update the message text. Null messages can be used to leave blank lines
+     * 
+     * @param message the new message text
+     * @return fluent interface
+     */
+    public DebugMessage setMessage(String message)
+    {
+        this.message = message;
+        return this;
+    }
+    
+    /**
+     * Set the message visibility.
+     * 
+     * @param visible visibility state
+     * @return fluent interface
+     */
+    public DebugMessage setVisible(boolean visible)
+    {
+        this.visible = visible;
+        return this;
+    }
+    
+    public boolean isVisible()
+    {
+        return this.visible;
+    }
+    
+    @Override
+    public String toString()
+    {
+        return this.message != null ? this.message : "";
+    }
+    
+    /**
+     * Remove the message permanently, to re-add the message you must create a
+     * new one. After calling this method, the {@link #setMessage} and
+     * {@link #setVisible} methods have no effect.
+     */
+    public void remove()
+    {
+        List<DebugMessage> messages = DebugMessage.messages.get(this.position);
+        if (messages != null)
+        {
+            messages.remove(this);
+            if (messages.size() == 0)
+            {
+                DebugMessage.messages.put(this.position, null);
+            }
+        }
+    }
+    
+    /**
+     * Create a new debug message with the specified initital values
+     * 
+     * @param position Position to display the message
+     * @param message Initial message (can be changed with {@link #setMessage}
+     * @return new message handle
+     */
+    public static DebugMessage create(Position position, String message)
+    {
+        if (position == null)
+        {
+            throw new NullPointerException("Null position specified");
+        }
+        
+        DebugMessage debugMessage = new DebugMessage(position, message);
+        if (DebugMessage.messages.get(position) == null)
+        {
+            DebugMessage.messages.put(position, new ArrayList<DebugMessage>()); 
+        }
+        
+        DebugMessage.messages.get(position).add(debugMessage);
+        return debugMessage;
+    }
+    
+    public static List<String> getMessages(Position position)
+    {
+        List<DebugMessage> debugMessages = DebugMessage.messages.get(position);
+        if (debugMessages == null)
+        {
+            return null;
+        }
+        
+        Builder<String> messages = ImmutableList.<String>builder();
+        for (DebugMessage debugMessage : debugMessages)
+        {
+            if (debugMessage.isVisible())
+            {
+                messages.add(debugMessage.toString());
+            }
+        }
+        return messages.build();
+    }
+}