新增渐变色特殊语法

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>cn.lunadeer</groupId>
     <artifactId>MinecraftPluginUtils</artifactId>
-    <version>1.3.4-SNAPSHOT</version>
+    <version>1.3.7-SNAPSHOT</version>
 
     <properties>
         <maven.compiler.source>17</maven.compiler.source>

src/main/java/cn/lunadeer/minecraftpluginutils/ColorParser.java

@@ -5,6 +5,7 @@ import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.format.TextColor;
 import org.bukkit.ChatColor;
 
+import java.awt.*;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
@@ -13,6 +14,7 @@ import java.util.regex.Pattern;
 public class ColorParser {
 
     public static TextComponent getComponentType(String text) {
+        text = parseGradient(text);
         String[] parts = text.split("&#");
         List<TextComponent> components = new ArrayList<>();
         for (String part : parts) {
@@ -21,7 +23,7 @@ public class ColorParser {
             }
             TextColor color = TextColor.fromHexString("#ffffff");
             String content;
-            if (part.length() > 6 && part.substring(0, 6).matches("^[0-9a-fA-F]{6}$")) {
+            if (part.length() >= 6 && part.substring(0, 6).matches("^[0-9a-fA-F]{6}$")) {
                 String color_str = part.substring(0, 6);
                 color = TextColor.fromHexString("#" + color_str);
                 content = part.substring(6);
@@ -45,6 +47,7 @@ public class ColorParser {
      * @return String
      */
     public static String getBukkitType(String text) {
+        text = parseGradient(text);
         String title = "&f" + text + "&f";
         title = title.replaceAll("&#", "#");
         Pattern pattern = Pattern.compile("#[a-fA-F0-9]{6}");
@@ -61,6 +64,7 @@ public class ColorParser {
     }
 
     public static String getPlainText(String text) {
+        text = parseGradient(text);
         String[] parts = text.split("&#");
         StringBuilder res = new StringBuilder();
         for (String part : parts) {
@@ -68,7 +72,7 @@ public class ColorParser {
                 continue;
             }
             String content;
-            if (part.length() > 6 && part.substring(0, 6).matches("^[0-9a-fA-F]{6}$")) {
+            if (part.length() >= 6 && part.substring(0, 6).matches("^[0-9a-fA-F]{6}$")) {
                 content = part.substring(6);
             } else {
                 content = part;
@@ -78,4 +82,84 @@ public class ColorParser {
         return res.toString();
     }
 
+    /**
+     * 解析渐变色语法
+     * <gradient:#2D8CF0:#19BE6B:#FF9900>这个是渐变色效果</gradient>
+     * 转换为 &#2d8cf0这&#279aca个&#22a9a4是&#1cb77e渐&#3ab95c变&#7cae3d色&#bda41f效&#ff9900果
+     *
+     * @param text 渐变色语法
+     * @return String
+     */
+    private static String parseGradient(String text) {
+        if (!text.contains("<gradient:")) {
+            return text;
+        }
+
+        StringBuilder result = new StringBuilder();
+        int startIndex = 0;
+
+        while (startIndex < text.length()) {
+            int openTagIndex = text.indexOf("<gradient:", startIndex);
+            if (openTagIndex == -1) {
+                // 如果没有找到<gradient>标签，直接追加剩余部分
+                result.append(text.substring(startIndex));
+                break;
+            }
+
+            // 追加标签前的普通文本
+            result.append(text, startIndex, openTagIndex);
+
+            int closeTagIndex = text.indexOf("</gradient>", openTagIndex);
+            if (closeTagIndex == -1) {
+                closeTagIndex = text.length();
+                text += "</gradient>";
+            }
+
+            // 提取颜色代码和内容
+            String gradientPart = text.substring(openTagIndex + 10, text.indexOf(">", openTagIndex));
+            String[] colors = gradientPart.split(":");
+            String content = text.substring(text.indexOf(">", openTagIndex) + 1, closeTagIndex);
+
+            result.append(applyGradient(content, colors));
+
+            startIndex = closeTagIndex + "</gradient>".length();
+        }
+        XLogger.debug("parseGradient %s", result.toString());
+        return result.toString();
+    }
+
+    private static String applyGradient(String content, String[] colors) {
+        StringBuilder gradientText = new StringBuilder();
+        int length = content.length();
+
+        for (int i = 0; i < length; i++) {
+            float ratio = (float) i / (length - 1);
+            Color color = interpolateColor(colors, ratio);
+            String hexColor = String.format("#%06x", color.getRGB() & 0xFFFFFF);
+            gradientText.append("&#").append(hexColor.substring(1)).append(content.charAt(i));
+        }
+
+        return gradientText.toString();
+    }
+
+    private static Color interpolateColor(String[] colors, float ratio) {
+        int segment = (int) (ratio * (colors.length - 1));
+
+        // 防止越界，如果计算出的 segment 索引等于 colors.length - 1，确保下一个颜色仍然在数组范围内
+        if (segment >= colors.length - 1) {
+            return Color.decode(colors[colors.length - 1]);
+        }
+
+        float segmentRatio = ratio * (colors.length - 1) - segment;
+
+        Color color1 = Color.decode(colors[segment]);
+        Color color2 = Color.decode(colors[segment + 1]);
+
+        int red = (int) (color1.getRed() * (1 - segmentRatio) + color2.getRed() * segmentRatio);
+        int green = (int) (color1.getGreen() * (1 - segmentRatio) + color2.getGreen() * segmentRatio);
+        int blue = (int) (color1.getBlue() * (1 - segmentRatio) + color2.getBlue() * segmentRatio);
+
+        return new Color(red, green, blue);
+    }
+
 }