Merge pull request #504 from gedoor/antecer

自动识别字体编码范围.

app/src/main/java/io/legado/app/help/JsExtensions.kt

@@ -270,15 +270,13 @@ interface JsExtensions {
     fun replaceFont(
         text: String,
         font1: QueryTTF?,
-        font2: QueryTTF?,
-        start: Int,
-        end: Int
+        font2: QueryTTF?
     ): String {
         if (font1 == null || font2 == null) return text
         val contentArray = text.toCharArray()
         contentArray.forEachIndexed { index, s ->
             val oldCode = s.toInt()
-            if (oldCode in start until end) {
+            if (font1.InLimit(s)) {
                 val code = font2.GetCodeByGlyf(font1.GetGlyfByCode(oldCode))
                 if(code != 0) contentArray[index] = code.toChar()
             }

app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.java

@@ -233,6 +233,8 @@ public class QueryTTF {
 
     public final Map<Integer, String> CodeToGlyph = new HashMap<>();
     public final Map<String, Integer> GlyphToCode = new HashMap<>();
+    private int LimitMix = 0;
+    private int LimitMax = 0;
 
     /**
      * 构造函数
@@ -475,6 +477,8 @@ public class QueryTTF {
             for (short b : Glyf.get(gid).xCoordinates) sb.append(b);
             for (short b : Glyf.get(gid).yCoordinates) sb.append(b);
             String val = sb.toString();
+            if(LimitMix == 0) LimitMix = key;
+            LimitMax = key;
             CodeToGlyph.put(key, val);
             if (GlyphToCode.containsKey(val)) continue;
             GlyphToCode.put(val, key);
@@ -564,6 +568,15 @@ public class QueryTTF {
         return glyfID;
     }
 
+    /**
+     * 判断Unicode值是否在字体范围内
+     * @param code 传入Unicode十进制值
+     * @return 返回bool查询结果
+     */
+    public boolean InLimit(char code){
+        return (LimitMix <= code) && (code < LimitMax);
+    }
+
     /**
      * 使用Unicode值获取轮廓数据
      *