Stop exporting the Font mimetype property

src/core/fonts.js

@@ -96,7 +96,6 @@ const EXPORT_DATA_PROPERTIES = [
   "isType3Font",
   "italic",
   "loadedName",
-  "mimetype",
   "missingFile",
   "name",
   "remeasure",
@@ -1050,7 +1049,6 @@ class Font {
   constructor(name, file, properties, evaluatorOptions) {
     this.name = name;
     this.psName = null;
-    this.mimetype = null;
     this.disableFontFace = evaluatorOptions.disableFontFace;
     this.fontExtraProperties = evaluatorOptions.fontExtraProperties;
 
@@ -1165,8 +1163,6 @@ class Font {
         /* falls through */
         case "Type1":
         case "CIDFontType0":
-          this.mimetype = "font/opentype";
-
           const cff =
             subtype === "Type1C" || subtype === "CIDFontType0C"
               ? new CFFFont(file, properties)
@@ -1181,8 +1177,6 @@ class Font {
         case "OpenType":
         case "TrueType":
         case "CIDFontType2":
-          this.mimetype = "font/opentype";
-
           // Repair the TrueType file. It is can be damaged in the point of
           // view of the sanitizer
           data = this.checkAndRepair(name, file, properties);

src/display/font_loader.js

@@ -567,7 +567,7 @@ class FontFaceObject {
   }
 
   get mimetype() {
-    return this.#fontData.mimetype;
+    return this.missingFile ? null : "font/opentype";
   }
 
   get name() {

src/display/obj_bin_transform_display.js

@@ -224,12 +224,8 @@ class FontInfo {
     return this.#readString(1);
   }
 
-  get mimetype() {
-    return this.#readString(2);
-  }
-
   get name() {
-    return this.#readString(3);
+    return this.#readString(2);
   }
 
   #getDataOffsets() {

src/shared/obj_bin_transform_utils.js

@@ -39,7 +39,7 @@ class FONT_INFO {
 
   static numbers = ["ascent", "descent"];
 
-  static strings = ["fallbackName", "loadedName", "mimetype", "name"];
+  static strings = ["fallbackName", "loadedName", "name"];
 
   static OFFSET_NUMBERS = Math.ceil((this.bools.length * 2) / 8);
 

test/unit/obj_bin_transform_spec.js

@@ -70,7 +70,6 @@ describe("obj_bin_transform", function () {
       fontMatrix: [1, 1, 1, 1, 1, 1],
       fallbackName: "string",
       loadedName: "string",
-      mimetype: "string",
       name: "string",
       data: new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]),
       uselessProp: "something",
@@ -124,7 +123,7 @@ describe("obj_bin_transform", function () {
 
       describe("FontInfo", function () {
         it("must roundtrip correctly for FontInfo", function () {
-          let sizeEstimate = 77; // fixed offset until the strings
+          let sizeEstimate = 67; // fixed offset until the strings
           const { encoder } = InfoUtils;
           sizeEstimate += 4 + 4 * (4 + encoder.encode("string").length);
           sizeEstimate += 4 + 4; // cssFontInfo and systemFontInfo
@@ -148,7 +147,6 @@ describe("obj_bin_transform", function () {
           expect(deserialized.fontMatrix).toEqual([1, 1, 1, 1, 1, 1]);
           expect(deserialized.fallbackName).toEqual("string");
           expect(deserialized.loadedName).toEqual("string");
-          expect(deserialized.mimetype).toEqual("string");
           expect(deserialized.name).toEqual("string");
           expect(Array.from(deserialized.data)).toEqual([
             1, 2, 3, 4, 5, 6, 7, 8, 9, 10,