v1.1 - add auto ping text color based on latency

.gitignore

@@ -3,3 +3,5 @@ build/
 out/
 .idea/
 run/
+logs/
+src/main/java/net/fabricmc/*

build.gradle

@@ -11,13 +11,11 @@ version = project.mod_version
 group = project.maven_group
 
 dependencies {
-	//to change the versions see the gradle.properties file
 	minecraft "com.mojang:minecraft:${project.minecraft_version}"
 	mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
 	modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
-
-	// Fabric API. This is technically optional, but you probably want it anyway.
 	modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
+	testImplementation 'junit:junit:4.13'
 }
 
 processResources {
@@ -33,9 +31,6 @@ processResources {
 	}
 }
 
-// ensure that the encoding is set to UTF-8, no matter what the system default is
-// this fixes some edge cases with special characters not displaying correctly
-// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
 tasks.withType(JavaCompile) {
 	options.encoding = "UTF-8"
 }
@@ -72,3 +67,17 @@ publishing {
 		// mavenLocal()
 	}
 }
+
+sourceSets {
+	main.java {
+		include 'com/vladmarica/betterpingdisplay/**/*'
+		exclude 'net/fabricmc/*'
+	}
+	test.java {
+		include 'com/vladmarica/betterpingdisplay/**/*'
+	}
+}
+
+test {
+	useJUnit()
+}

gradle.properties

@@ -10,7 +10,7 @@ org.gradle.jvmargs=-Xmx1G
 # Mod Properties
 	mod_version = 1.1.0
 	maven_group = com.vladmarica
-	archives_base_name = BetterPingDisplay
+	archives_base_name = BetterPingDisplay-Fabric
 
 # Dependencies
 	# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api

src/main/java/com/vladmarica/betterpingdisplay/BetterPingDisplayMod.java

@@ -26,6 +26,7 @@ public class BetterPingDisplayMod implements ModInitializer {
 			try {
 				ConfigData data = Config.loadConfigFile(configFile);
 				config = new Config(data);
+				Config.writeConfigFile(configFile, data);
 			} catch (Exception ex) {
 				LOGGER.error("Failed to load config file, using default. Error: {}", ex.getMessage());
 			}

src/main/java/com/vladmarica/betterpingdisplay/Config.java

@@ -13,28 +13,33 @@ public class Config {
   private static final int DEFAULT_PING_TEXT_COLOR = 0xA0A0A0;
   private static final String DEFAULT_PING_TEXT_FORMAT = "%dms";
 
+  private boolean autoColorPingText;
+  private boolean renderPingBars;
   private int textColor = DEFAULT_PING_TEXT_COLOR;
   private String textFormatString = DEFAULT_PING_TEXT_FORMAT;
 
   public Config(ConfigData confileFileFormat) {
-    if (confileFileFormat.textColor.startsWith("#")) {
+    if (confileFileFormat.pingTextColor.startsWith("#")) {
       try {
-        textColor = Integer.parseInt(confileFileFormat.textColor.substring(1), 16);
+        textColor = Integer.parseInt(confileFileFormat.pingTextColor.substring(1), 16);
       }
       catch (NumberFormatException ex) {
-        BetterPingDisplayMod.LOGGER.error("Config option 'textColor' is invalid - it must be a hex color code");
+        BetterPingDisplayMod.LOGGER.error("Config option 'pingTextColor' is invalid - it must be a hex color code");
       }
     }
     else {
-      BetterPingDisplayMod.LOGGER.error("Config option 'textColor' is invalid - it must be a hex color code");
+      BetterPingDisplayMod.LOGGER.error("Config option 'pingTextColor' is invalid - it must be a hex color code");
     }
 
-    if (confileFileFormat.textFormatString.contains("%d")) {
+    if (confileFileFormat.pingTextFormatString.contains("%d")) {
-      textFormatString = confileFileFormat.textFormatString;
+      textFormatString = confileFileFormat.pingTextFormatString;
     }
     else {
-      BetterPingDisplayMod.LOGGER.error("Config option 'textFormatString' is invalid - it needs to contain %d");
+      BetterPingDisplayMod.LOGGER.error("Config option 'pingTextFormatString' is invalid - it needs to contain %d");
     }
+
+    autoColorPingText = confileFileFormat.autoColorPingText;
+    renderPingBars = confileFileFormat.renderPingBars;
   }
 
   public Config() {
@@ -49,6 +54,14 @@ public class Config {
     return this.textFormatString;
   }
 
+  public boolean shouldAutoColorPingText() {
+    return this.autoColorPingText;
+  }
+
+  public boolean shouldRenderPingBars() {
+    return this.renderPingBars;
+  }
+
   public static ConfigData loadConfigFile(File configFile) throws IOException {
     FileReader reader = null;
     try {
@@ -78,9 +91,15 @@ public class Config {
 
   public static class ConfigData implements Serializable {
     @Expose
-    private String textColor = "#A0A0A0";
+    private boolean autoColorPingText = true;
 
     @Expose
-    private String textFormatString = "%dms";
+    private boolean renderPingBars = false;
+
+    @Expose
+    private String pingTextColor = "#A0A0A0";
+
+    @Expose
+    private String pingTextFormatString = "%dms";
   }
 }

src/main/java/com/vladmarica/betterpingdisplay/hud/ColorUtil.java

@@ -0,0 +1,32 @@
+package com.vladmarica.betterpingdisplay.hud;
+
+public class ColorUtil {
+
+  public static int interpolate(int colorStart, int colorEnd, float offset) {
+    if (offset < 0 || offset > 1) {
+      throw new IllegalArgumentException("Offset must be between 0.0 and 1.0");
+    }
+
+    int redDiff = getRed(colorEnd) - getRed(colorStart);
+    int greenDiff = getGreen(colorEnd) - getGreen(colorStart);
+    int blueDiff = getBlue(colorEnd) - getBlue(colorStart);
+
+    int newRed = Math.round(getRed(colorStart) + (redDiff * offset));
+    int newGreen = Math.round(getGreen(colorStart) + (greenDiff * offset));
+    int newBlue = Math.round(getBlue(colorStart) + (blueDiff * offset));
+
+    return (newRed << 16) | (newGreen << 8) | newBlue;
+  }
+
+  static int getRed(int color) {
+    return (color >> 16) & 0xFF;
+  }
+
+  static int getGreen(int color) {
+    return (color >> 8) & 0xFF;
+  }
+
+  static int getBlue(int color) {
+    return color & 0xFF;
+  }
+}

src/main/java/com/vladmarica/betterpingdisplay/hud/CustomPlayerListHud.java

@@ -4,8 +4,8 @@ import com.google.common.collect.ComparisonChain;
 import com.google.common.collect.Ordering;
 import com.mojang.authlib.GameProfile;
 import com.mojang.blaze3d.systems.RenderSystem;
-import com.vladmarica.betterpingdisplay.Config;
 import com.vladmarica.betterpingdisplay.BetterPingDisplayMod;
+import com.vladmarica.betterpingdisplay.Config;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
@@ -33,6 +33,7 @@ public final class CustomPlayerListHud {
   private static final int PING_TEXT_RENDER_OFFSET = -13;
   private static final int PLAYER_SLOT_EXTRA_WIDTH = 45;
   private static final int PLAYER_ICON_WIDTH = 9;
+  private static final int PING_BARS_WIDTH = 11;
 
   public static void render(PlayerListHud hud, int width, Scoreboard scoreboard, ScoreboardObjective obj) {
     MinecraftClient mc = MinecraftClient.getInstance();
@@ -175,13 +176,30 @@ public final class CustomPlayerListHud {
         // Here is the magic, rendering the ping text
         String pingString = String.format(config.getTextFormatString(), player.getLatency());
         int pingStringWidth = textRenderer.getStringWidth(pingString);
-        textRenderer.drawWithShadow(
+        int textX = r + aa - pingStringWidth + PING_TEXT_RENDER_OFFSET;
-            pingString,
-            (float) r + aa - pingStringWidth + PING_TEXT_RENDER_OFFSET - (displayPlayerIcons ? PLAYER_ICON_WIDTH : 0),
-            (float) ab,
-            config.getTextColor());
 
-        PlayerListHudUtil.renderLatencyIcon(hud, r, aa - (displayPlayerIcons ? PLAYER_ICON_WIDTH : 0), ab, player);
+        if (displayPlayerIcons) {
+          textX -= PLAYER_ICON_WIDTH;
+        }
+
+        if (!config.shouldRenderPingBars()) {
+          textX += PING_BARS_WIDTH;
+        }
+
+        int pingTextColor = config.shouldAutoColorPingText()
+            ? PingColors.getColor(player.getLatency())
+            : config.getTextColor();
+
+        textRenderer.drawWithShadow(pingString, (float) textX, (float) ab, pingTextColor);
+
+        if (config.shouldRenderPingBars()) {
+          PlayerListHudUtil.renderLatencyIcon(
+              hud, r, aa - (displayPlayerIcons ? PLAYER_ICON_WIDTH : 0), ab, player);
+        } else {
+          // If we don't render ping bars, we need to reset the render system color so the rest
+          // of the player list renders properly
+          RenderSystem.color4f(1.0F, 1.0F, 1.0F, 1.0F);
+        }
       }
     }
 

src/main/java/com/vladmarica/betterpingdisplay/hud/PingColors.java

@@ -1,19 +1,37 @@
 package com.vladmarica.betterpingdisplay.hud;
 
+import net.minecraft.util.math.MathHelper;
 
-// start: #00e676
-// mid #d6cd30
-// end #e53935
 public class PingColors {
+  public static final int PING_START = 0;
+  public static final int PING_MID = 150;
+  public static final int PING_END = 300;
+
+  public static final int COLOR_GREY = 0x535353;
+  public static final int COLOR_START = 0x00E676;
+  public static final int COLOR_MID = 0xD6CD30;
+  public static final int COLOR_END = 0xE53935;
+
   public static int getColor(int ping) {
-    if (ping < 0) {
+    if (ping < PING_START) {
-      return 0x535353;
+      return COLOR_GREY;
     }
-    if (ping < 150) {
+
-      return 0x00E676;
+    if (ping < PING_MID) {
-    }
+      return ColorUtil.interpolate(
-    if (ping < 300) {
+          COLOR_START,
-      return 0xC6FF00;
+          COLOR_MID,
+          computeOffset(PING_START, PING_MID, ping));
     }
+
+    return ColorUtil.interpolate(
+        COLOR_MID,
+        COLOR_END,
+        computeOffset(PING_MID, PING_END, Math.min(ping, PING_END)));
+  }
+
+  static float computeOffset(int start, int end, int value) {
+    float offset =  (value - start) / (float) ( end - start);
+    return MathHelper.clamp(offset, 0.0F, 1.0F);
   }
 }

src/main/java/com/vladmarica/betterpingdisplay/hud/PlayerListHudUtil.java

@@ -7,10 +7,12 @@ import net.minecraft.scoreboard.ScoreboardObjective;
 import net.minecraft.text.Text;
 
 public class PlayerListHudUtil {
+  /** Calls {@link net.minecraft.client.gui.hud.PlayerListHud#renderLatencyIcon}. */
   static void renderLatencyIcon(PlayerListHud hud, int x, int offsetX, int y, PlayerListEntry player) {
     ((PlayerListHudAccessor) hud).invokeRenderLatencyIcon(x, offsetX, y, player);
   }
 
+  /** Calls {@link net.minecraft.client.gui.hud.PlayerListHud#renderScoreboardObjective} */
   static void renderScoreboardObjective(PlayerListHud hud, ScoreboardObjective obj, int i, String str, int j, int k, PlayerListEntry player) {
     ((PlayerListHudAccessor) hud).invokeRenderScoreboardObjective(obj, i, str, j, k, player);
   }

src/main/resources/fabric.mod.json

@@ -4,7 +4,7 @@
   "version": "1.1",
 
   "name": "Better Ping Display",
-  "description": "Shows the actual ping number instead of just bars in the player list.!",
+  "description": "Shows the actual ping number instead of just bars in the player list!",
   "authors": [
     "Quintinity"
   ],

src/test/java/com/vladmarica/betterpingdisplay/hud/ColorUtilTest.java

@@ -0,0 +1,48 @@
+package com.vladmarica.betterpingdisplay.hud;
+
+import static com.vladmarica.betterpingdisplay.hud.PingColors.COLOR_MID;
+import static com.vladmarica.betterpingdisplay.hud.PingColors.COLOR_START;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThrows;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public class ColorUtilTest {
+
+  @Test
+  public void testExtractComponents() {
+    int color = 0xD6C130;
+    assertEquals(0xD6, ColorUtil.getRed(color));
+    assertEquals(0xC1, ColorUtil.getGreen(color));
+    assertEquals(0x30, ColorUtil.getBlue(color));
+  }
+
+  @Test
+  public void testInterpolation_zero() {
+    int color = ColorUtil.interpolate(COLOR_START, COLOR_MID, 0F);
+    assertEquals(COLOR_START, color);
+  }
+
+  @Test
+  public void testInterpolation_middle() {
+    int color = ColorUtil.interpolate(COLOR_START, COLOR_MID, 0.5F);
+    assertEquals(0x6b, ColorUtil.getRed(color));
+    assertEquals(0xda, ColorUtil.getGreen(color));
+    assertEquals(0x53, ColorUtil.getBlue(color));
+  }
+
+  @Test
+  public void testInterpolation_one() {
+    int color = ColorUtil.interpolate(COLOR_START, COLOR_MID, 1F);
+    assertEquals(COLOR_MID, color);
+  }
+
+  @Test
+  public void testInterpolation_invalidOffset() {
+    assertThrows(IllegalArgumentException.class, () -> ColorUtil.interpolate(0, 1, -0.1F));
+    assertThrows(IllegalArgumentException.class, () -> ColorUtil.interpolate(0, 1, 1.1F));
+  }
+}