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fix: documents failing to seal (#1821)

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During our field rework that makes fields appear
more accurately between signing and the completed pdf we swapped to
using text fields. Unfortunately as part of that we dropped using the
Noto font for the text field causing ANSI encoding issues when
encountering certain characters.

This change restores the font and handles a nasty issue we had with our
form flattening reverting our selected font.
This commit is contained in:
Lucas Smith
2025-06-04 23:29:36 +10:00
committed by GitHub
parent 93aece9644
commit 695ed418e2
4 changed files with 48 additions and 47 deletions
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15
packages/lib/server-only/pdf/flatten-form.ts
View File

@ -1,3 +1,4 @@
import fontkit from '@pdf-lib/fontkit';
import type { PDFField, PDFWidgetAnnotation } from 'pdf-lib';
import {
PDFCheckBox,
@ -13,6 +14,8 @@ import {
translate,
} from 'pdf-lib';
import { NEXT_PUBLIC_WEBAPP_URL } from '../../constants/app';
export const removeOptionalContentGroups = (document: PDFDocument) => {
const context = document.context;
const catalog = context.lookup(context.trailerInfo.Root);
@ -21,12 +24,20 @@ export const removeOptionalContentGroups = (document: PDFDocument) => {
}
};
export const flattenForm = (document: PDFDocument) => {
export const flattenForm = async (document: PDFDocument) => {
removeOptionalContentGroups(document);
const form = document.getForm();
form.updateFieldAppearances();
const fontNoto = await fetch(`${NEXT_PUBLIC_WEBAPP_URL()}/fonts/noto-sans.ttf`).then(
async (res) => res.arrayBuffer(),
);
document.registerFontkit(fontkit);
const font = await document.embedFont(fontNoto);
form.updateFieldAppearances(font);
for (const field of form.getFields()) {
for (const widget of field.acroField.getWidgets()) {