XFA - Add Liberation-Sans font as a substitution for some missing fonts

- Some js files contain scale factors for each glyph in order to rescale Liberation to have a final font with the correct width.
  - A lot of XFA have some containers where their dimensions are based on their text content, so using default font from browser can lead to an almost unreadable pdf.

src/core/xfa_fonts.js

@@ -0,0 +1,120 @@
+/* Copyright 2021 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { CalibriBoldFactors } from "./calibri_bold.js";
+import { CalibriBoldItalicFactors } from "./calibri_bold_italic.js";
+import { CalibriItalicFactors } from "./calibri_italic.js";
+import { CalibriRegularFactors } from "./calibri_regular.js";
+import { getLookupTableFactory } from "./core_utils.js";
+import { HelveticaBoldFactors } from "./helvetica_bold.js";
+import { HelveticaBoldItalicFactors } from "./helvetica_bold_italic.js";
+import { HelveticaItalicFactors } from "./helvetica_italic.js";
+import { HelveticaRegularFactors } from "./helvetica_regular.js";
+import { MyriadProBoldFactors } from "./myriadpro_bold.js";
+import { MyriadProBoldItalicFactors } from "./myriadpro_bold_italic.js";
+import { MyriadProItalicFactors } from "./myriadpro_italic.js";
+import { MyriadProRegularFactors } from "./myriadpro_regular.js";
+import { normalizeFontName } from "./fonts_utils.js";
+import { SegoeuiBoldFactors } from "./segoeui_bold.js";
+import { SegoeuiBoldItalicFactors } from "./segoeui_bold_italic.js";
+import { SegoeuiItalicFactors } from "./segoeui_italic.js";
+import { SegoeuiRegularFactors } from "./segoeui_regular.js";
+
+const getXFAFontMap = getLookupTableFactory(function (t) {
+  t["MyriadPro-Regular"] = {
+    name: "LiberationSans-Regular",
+    factors: MyriadProRegularFactors,
+  };
+  t["MyriadPro-Bold"] = {
+    name: "LiberationSans-Bold",
+    factors: MyriadProBoldFactors,
+  };
+  t["MyriadPro-It"] = {
+    name: "LiberationSans-Italic",
+    factors: MyriadProItalicFactors,
+  };
+  t["MyriadPro-BoldIt"] = {
+    name: "LiberationSans-BoldItalic",
+    factors: MyriadProBoldItalicFactors,
+  };
+  t.ArialMT = {
+    name: "LiberationSans-Regular",
+  };
+  t["Arial-BoldMT"] = {
+    name: "LiberationSans-Bold",
+  };
+  t["Arial-ItalicMT"] = {
+    name: "LiberationSans-Italic",
+  };
+  t["Arial-BoldItalicMT"] = {
+    name: "LiberationSans-BoldItalic",
+  };
+  t["Calibri-Regular"] = {
+    name: "LiberationSans-Regular",
+    factors: CalibriRegularFactors,
+  };
+  t["Calibri-Bold"] = {
+    name: "LiberationSans-Bold",
+    factors: CalibriBoldFactors,
+  };
+  t["Calibri-Italic"] = {
+    name: "LiberationSans-Italic",
+    factors: CalibriItalicFactors,
+  };
+  t["Calibri-BoldItalic"] = {
+    name: "LiberationSans-BoldItalic",
+    factors: CalibriBoldItalicFactors,
+  };
+  t["Segoeui-Regular"] = {
+    name: "LiberationSans-Regular",
+    factors: SegoeuiRegularFactors,
+  };
+  t["Segoeui-Bold"] = {
+    name: "LiberationSans-Bold",
+    factors: SegoeuiBoldFactors,
+  };
+  t["Segoeui-Italic"] = {
+    name: "LiberationSans-Italic",
+    factors: SegoeuiItalicFactors,
+  };
+  t["Segoeui-BoldItalic"] = {
+    name: "LiberationSans-BoldItalic",
+    factors: SegoeuiBoldItalicFactors,
+  };
+  t["Helvetica-Regular"] = {
+    name: "LiberationSans-Regular",
+    factors: HelveticaRegularFactors,
+  };
+  t["Helvetica-Bold"] = {
+    name: "LiberationSans-Bold",
+    factors: HelveticaBoldFactors,
+  };
+  t["Helvetica-Italic"] = {
+    name: "LiberationSans-Italic",
+    factors: HelveticaItalicFactors,
+  };
+  t["Helvetica-BoldItalic"] = {
+    name: "LiberationSans-BoldItalic",
+    factors: HelveticaBoldItalicFactors,
+  };
+});
+
+function getXfaFontName(name) {
+  const fontName = normalizeFontName(name);
+  const fontMap = getXFAFontMap();
+  return fontMap[fontName];
+}
+
+export { getXfaFontName };