Fixing TOC and utf-8 conversion.

src/epub.js

@@ -9,16 +9,49 @@ if (isNode()){
     var generatedBufferType = 'uint8array'
 }
 
+function Utf8ArrayToStr(array) {
+    var out, i, len, c;
+    var char2, char3;
+
+    out = "";
+    len = array.length;
+    i = 0;
+    while(i < len) {
+    c = array[i++];
+    switch(c >> 4)
+    {
+      case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+        // 0xxxxxxx
+        out += String.fromCharCode(c);
+        break;
+      case 12: case 13:
+        // 110x xxxx   10xx xxxx
+        char2 = array[i++];
+        out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
+        break;
+      case 14:
+        // 1110 xxxx  10xx xxxx  10xx xxxx
+        char2 = array[i++];
+        char3 = array[i++];
+        out += String.fromCharCode(((c & 0x0F) << 12) |
+                       ((char2 & 0x3F) << 6) |
+                       ((char3 & 0x3F) << 0));
+        break;
+    }
+    }
+
+    return out;
+}
+
 class EpubXhtml{
     constructor(filename) {
-        let name = filename.split('.')
-        name[name.length-1] = 'xhtml'
-        this.filename = name.join('.')
+        this.filename = filename
         this.mime = 'application/xhtml+xml'
     }
 
     convert(content){
-        let html = new StringDecoder("utf-8").write(content)
+        // let html = new StringDecoder("utf-8").write(content)
+        let html = Utf8ArrayToStr(content)
         let dom = new DOMParser().parseFromString(html, 'text/html');
         let xml = XMLSerializer.serializeToString(dom);
 //         let cnt = `<?xml version="1.0" encoding="utf-8" standalone="no"?>