fix(text-minimessage): Handle larger raninbow phases correctly

Fixes GH-1040

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/tag/standard/RainbowTag.java

@@ -47,7 +47,7 @@ final class RainbowTag extends AbstractColorChangingTag {
   static final TagResolver RESOLVER = TagResolver.resolver(RAINBOW, RainbowTag::create);
 
   private final boolean reversed;
-  private final int phase;
+  private final double dividedPhase;
 
   private int colorIndex = 0;
 
@@ -75,7 +75,7 @@ static Tag create(final ArgumentQueue args, final Context ctx) {
 
   private RainbowTag(final boolean reversed, final int phase) {
     this.reversed = reversed;
-    this.phase = phase;
+    this.dividedPhase = ((double) phase) / 10d;
   }
 
   @Override
@@ -101,25 +101,25 @@ protected void advanceColor() {
   @Override
   protected TextColor color() {
     final float index = this.colorIndex;
-    final float hue = (index / this.size() + this.phase / 10f) % 1;
+    final float hue = (float) ((index / this.size() + this.dividedPhase) % 1f);
     return TextColor.color(HSVLike.hsvLike(hue, 1f, 1f));
   }
 
   @Override
   public @NotNull Stream<? extends ExaminableProperty> examinableProperties() {
-    return Stream.of(ExaminableProperty.of("phase", this.phase));
+    return Stream.of(ExaminableProperty.of("phase", this.dividedPhase));
   }
 
   @Override
   public boolean equals(final @Nullable Object other) {
     if (this == other) return true;
     if (other == null || this.getClass() != other.getClass()) return false;
     final RainbowTag that = (RainbowTag) other;
-    return this.colorIndex == that.colorIndex && this.phase == that.phase;
+    return this.colorIndex == that.colorIndex && this.dividedPhase == that.dividedPhase;
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(this.colorIndex, this.phase);
+    return Objects.hash(this.colorIndex, this.dividedPhase);
   }
 }

text-minimessage/src/test/java/net/kyori/adventure/text/minimessage/tag/standard/RainbowTagTest.java

@@ -30,6 +30,7 @@
 
 import static net.kyori.adventure.text.Component.empty;
 import static net.kyori.adventure.text.Component.text;
+import static net.kyori.adventure.text.Component.textOfChildren;
 import static net.kyori.adventure.text.event.ClickEvent.openUrl;
 import static net.kyori.adventure.text.format.NamedTextColor.BLACK;
 import static net.kyori.adventure.text.format.NamedTextColor.GREEN;
@@ -352,4 +353,24 @@ void gh147() {
     final Component expected1 = text().append(text("y", color(0xff0000)), text("o", color(0x00ffff))).build();
     this.assertParsedEquals(expected1, input, component("msg", text("yo")));
   }
+
+  // https://github.com/KyoriPowered/adventure/issues/1040
+  @Test
+  void gh1040() {
+    final String input = "<rainbow:16777215>||||||||||";
+    final Component expected = textOfChildren(
+      text("|", color(0x00ffff)),
+      text("|", color(0x0065ff)),
+      text("|", color(0x3200ff)),
+      text("|", color(0xcc00ff)),
+      text("|", color(0xff0099)),
+      text("|", color(0xff0000)),
+      text("|", color(0xff9900)),
+      text("|", color(0xccff00)),
+      text("|", color(0x32ff00)),
+      text("|", color(0x00ff65))
+    );
+
+    this.assertParsedEquals(expected, input);
+  }
 }