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XFA -- Load fonts permanently from the pdf

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- Different fonts can be used in xfa and some of them are embedded in the pdf.
  - Load all the fonts in window.document.

Update src/core/document.js

Co-authored-by: Jonas Jenwald <jonas.jenwald@gmail.com>

Update src/core/worker.js

Co-authored-by: Jonas Jenwald <jonas.jenwald@gmail.com>
This commit is contained in:
Calixte Denizet 2021-03-26 09:28:18 +01:00
parent 6cf3070008
commit 7e9579045f
8 changed files with 318 additions and 21 deletions
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66
src/core/core_utils.js
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@ -19,6 +19,7 @@ import {
bytesToString,
objectSize,
stringToPDFString,
warn,
} from "../shared/util.js";
import { Dict, isName, isRef, isStream, RefSet } from "./primitives.js";
@ -376,6 +377,70 @@ function encodeToXmlString(str) {
return buffer.join("");
}
function validateCSSFont(cssFontInfo) {
// See https://developer.mozilla.org/en-US/docs/Web/CSS/font-style.
const DEFAULT_CSS_FONT_OBLIQUE = "14";
// See https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight.
const DEFAULT_CSS_FONT_WEIGHT = "400";
const CSS_FONT_WEIGHT_VALUES = new Set([
"100",
"200",
"300",
"400",
"500",
"600",
"700",
"800",
"900",
"1000",
"normal",
"bold",
"bolder",
"lighter",
]);
const { fontFamily, fontWeight, italicAngle } = cssFontInfo;
// See https://developer.mozilla.org/en-US/docs/Web/CSS/string.
if (/^".*"$/.test(fontFamily)) {
if (/[^\\]"/.test(fontFamily.slice(1, fontFamily.length - 1))) {
warn(`XFA - FontFamily contains some unescaped ": ${fontFamily}.`);
return false;
}
} else if (/^'.*'$/.test(fontFamily)) {
if (/[^\\]'/.test(fontFamily.slice(1, fontFamily.length - 1))) {
warn(`XFA - FontFamily contains some unescaped ': ${fontFamily}.`);
return false;
}
} else {
// See https://developer.mozilla.org/en-US/docs/Web/CSS/custom-ident.
for (const ident of fontFamily.split(/[ \t]+/)) {
if (
/^([0-9]|(-([0-9]|-)))/.test(ident) ||
!/^[a-zA-Z0-9\-_\\]+$/.test(ident)
) {
warn(
`XFA - FontFamily contains some invalid <custom-ident>: ${fontFamily}.`
);
return false;
}
}
}
const weight = fontWeight ? fontWeight.toString() : "";
cssFontInfo.fontWeight = CSS_FONT_WEIGHT_VALUES.has(weight)
? weight
: DEFAULT_CSS_FONT_WEIGHT;
const angle = parseFloat(italicAngle);
cssFontInfo.italicAngle =
isNaN(angle) || angle < -90 || angle > 90
? DEFAULT_CSS_FONT_OBLIQUE
: italicAngle.toString();
return true;
}
export {
collectActions,
encodeToXmlString,
@ -391,6 +456,7 @@ export {
readUint16,
readUint32,
toRomanNumerals,
validateCSSFont,
XRefEntryException,
XRefParseException,
};