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zgapdfsigner
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Improved to support font subsetting and changed to use pdf-fontkit.

main
zboris12 2024-08-19 21:33:38 +09:00
parent 4def4068f7
commit 9706bfe31a
8 changed files with 44 additions and 344 deletions
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7
README.md
View File

@ -39,6 +39,8 @@ signing with a timestamp from [TSA](https://github.com/zboris12/zgapdfsigner/wik
* [pdf-lib](https://pdf-lib.js.org/)
* [node-forge](https://github.com/digitalbazaar/forge)
* [follow-redirects](https://github.com/follow-redirects/follow-redirects)
* [pako](https://github.com/nodeca/pako) - For drawing text
* [pdf-fontkit](https://github.com/znacloud/pdf-fontkit) - For drawing text
## How to use this tool
@ -53,9 +55,10 @@ Just import the dependencies and this tool.
```
When drawing text for signature, importing fontkit and pako library is necessary.
```html
<script src="https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js" type="text/javascript"></script>
```
Thanks to [znacloud](https://github.com/znacloud/pdf-fontkit) for fixing the font subsetting issue in [@pdf-lib/fontkit](https://github.com/Hopding/fontkit).
### [Google Apps Script](https://developers.google.com/apps-script)
Load the dependencies and this tool.
@ -70,7 +73,7 @@ var window = globalThis;
// Load pdf-lib
eval(UrlFetchApp.fetch("https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js").getContentText());
// It is necessary for drawing text for signature.
eval(UrlFetchApp.fetch("https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js").getContentText());
eval(UrlFetchApp.fetch("https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js").getContentText());
// Load pako, It is necessary for drawing text for signature.
eval(UrlFetchApp.fetch("https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js").getContentText());
// Load node-forge

1
closure/zb-externs.js
View File

@ -36,6 +36,7 @@ var SignAreaInfo;
* {{
* text: string,
* fontData: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
* subset: (boolean|undefined),
* color: (string|undefined),
* opacity: (number|undefined),
* blendMode: (string|undefined),

3
lib/zganode.d.ts vendored
View File

@ -38,6 +38,7 @@ export type SignAreaInfo = {
export type SignTextInfo = {
text: string,
fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts;
subset?: boolean;
color?: string;
opacity?: number;
blendMode?: string;
@ -112,5 +113,5 @@ export declare class TsaFetcher {
export declare class PdfFonts {
private constructor();
static from(pdfdoc: PDFLib.PDFDocument): Promise<PdfFonts>;
getEmbeddedFont(fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts): Promise<PDFLib.PDFFont>;
getEmbeddedFont(fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts, subset?: boolean): Promise<PDFLib.PDFFont>;
}

3
lib/zganode.js
View File

@ -6,7 +6,8 @@ const m_h = {
const z = require("./zgaindex.js");
z.forge = require("node-forge");
z.PDFLib = require("pdf-lib");
z.fontkit = require("@pdf-lib/fontkit");
// z.fontkit = require("@pdf-lib/fontkit");
z.fontkit = require("pdf-fontkit");
z.pako = require("pako");
/**
* @param {string} url

28
lib/zgapdfsigner.js
View File

@ -347,7 +347,7 @@ z.PdfSigner = class{
if(_this.opt.drawinf && _this.opt.drawinf.textInfo && !_this.opt.drawinf.font){
_this.fonts = await z.PdfFonts.from(pdfdoc);
_this.opt.drawinf.font = await _this.fonts.getEmbeddedFont(_this.opt.drawinf.textInfo.fontData);
_this.opt.drawinf.font = await _this.fonts.getEmbeddedFont(_this.opt.drawinf.textInfo.fontData, _this.opt.drawinf.textInfo.subset);
}
/** @type {forge_cert} */
@ -1910,12 +1910,16 @@ z.PdfFonts = class{
if(fltr == "/FlateDecode"){
fdat = pako.inflate(fdat);
}
/** @type {PDFLib.CustomFontEmbedder} */
var emdr = await PDFLib.CustomFontEmbedder.for(fontkit, fdat);
fonts.push({
font: PDFLib.PDFFont.of(poe[0], pdfdoc, emdr),
data: fdat,
});
try{
/** @type {PDFLib.CustomFontEmbedder} */
var emdr = await PDFLib.CustomFontEmbedder.for(fontkit, fdat);
fonts.push({
font: PDFLib.PDFFont.of(poe[0], pdfdoc, emdr),
data: fdat,
});
}catch(ex){
z.log(fntnm, ex.message);
}
}
}
}
@ -1929,9 +1933,10 @@ z.PdfFonts = class{
/**
* @public
* @param {Array<number>|Uint8Array|ArrayBuffer|string|undefined} fontData
* @param {boolean=} subset
* @return {Promise<PDFLib.PDFFont>}
*/
async getEmbeddedFont(fontData){
async getEmbeddedFont(fontData, subset){
if(!fontData){
if(this.fonts.length){
z.log("Use existing default font.", this.fonts[0].font.name);
@ -1946,7 +1951,7 @@ z.PdfFonts = class{
}else{
/** @type {Uint8Array} */
var u8dat = (fontData instanceof Uint8Array) ? fontData : new Uint8Array(fontData);
return await this.getCustomFont(u8dat);
return await this.getCustomFont(u8dat, subset || false);
}
}
@ -1972,9 +1977,10 @@ z.PdfFonts = class{
/**
* @private
* @param {Uint8Array} fontData
* @param {boolean} subset
* @return {Promise<PDFLib.PDFFont>}
*/
async getCustomFont(fontData){
async getCustomFont(fontData, subset){
/** @type {number} */
var i = 0;
while(i < this.fonts.length){
@ -1987,7 +1993,7 @@ z.PdfFonts = class{
}
}
this.doc.registerFontkit(fontkit);
return await this.doc.embedFont(fontData);
return await this.doc.embedFont(fontData, {subset});
}
/**
* @private

338
package-lock.json generated
View File

@ -1,31 +1,23 @@
{
"name": "zgapdfsigner",
"version": "2.5.2",
"lockfileVersion": 2,
"version": "2.7.2",
"lockfileVersion": 3,
"requires": true,
"packages": {
"": {
"name": "zgapdfsigner",
"version": "2.5.2",
"version": "2.7.2",
"license": "MIT",
"dependencies": {
"@pdf-lib/fontkit": "^1.1.1",
"follow-redirects": "1.15.6",
"node-forge": "1.3.1",
"pdf-fontkit": "1.8.9",
"pdf-lib": "1.17.1"
},
"devDependencies": {
"google-closure-compiler": "^20231112.0.0"
}
},
"node_modules/@pdf-lib/fontkit": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/@pdf-lib/fontkit/-/fontkit-1.1.1.tgz",
"integrity": "sha512-KjMd7grNapIWS/Dm0gvfHEilSyAmeLvrEGVcqLGi0VYebuqqzTbgF29efCx7tvx+IEbG3zQciRSWl3GkUSvjZg==",
"dependencies": {
"pako": "^1.0.6"
}
},
"node_modules/@pdf-lib/standard-fonts": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/@pdf-lib/standard-fonts/-/standard-fonts-1.0.0.tgz",
@ -181,35 +173,6 @@
"integrity": "sha512-E45cJD6/xLJlL8pL6HEoxu8nEKp87CnrojUK0UuHiT7ZjCsrJfR4WhZwNNCq2+/6gYD9unGgMsunV4DDtBbvaA==",
"dev": true
},
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"resolved": "https://registry.npmjs.org/google-closure-compiler-linux/-/google-closure-compiler-linux-20231112.0.0.tgz",
"integrity": "sha512-qi2DbqQ+OuZ4Mcp1EttmL4j3oqvXLPl8XREekkfdV651PXBNenoBG6EnzQIius7ESYVgmpbQE4Pw2wNhPudBBQ==",
"cpu": [
"x32",
"x64"
],
"dev": true,
"optional": true,
"os": [
"linux"
]
},
"node_modules/google-closure-compiler-osx": {
"version": "20231112.0.0",
"resolved": "https://registry.npmjs.org/google-closure-compiler-osx/-/google-closure-compiler-osx-20231112.0.0.tgz",
"integrity": "sha512-gNnlnVH4rVO5TyDhvqELzRc9Oydaxincj0QLsAQQkM0btBTUEEyFL1ACT00RgJKxrCTb5Lfa83DfU8ICJi5Ptw==",
"cpu": [
"x32",
"x64",
"arm64"
],
"dev": true,
"optional": true,
"os": [
"darwin"
]
},
"node_modules/google-closure-compiler-windows": {
"version": "20231112.0.0",
"resolved": "https://registry.npmjs.org/google-closure-compiler-windows/-/google-closure-compiler-windows-20231112.0.0.tgz",
@ -267,6 +230,14 @@
"resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
"integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw=="
},
"node_modules/pdf-fontkit": {
"version": "1.8.9",
"resolved": "https://registry.npmjs.org/pdf-fontkit/-/pdf-fontkit-1.8.9.tgz",
"integrity": "sha512-TTq+umfhlFjUuQYOq6dCKT/wLslCrX4zVr5gqrIvrGHfo+vJ3ETapZTb4YLOCErohX7pF+HxlXSZuiToSRhNmA==",
"dependencies": {
"pako": "^1.0.6"
}
},
"node_modules/pdf-lib": {
"version": "1.17.1",
"resolved": "https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.17.1.tgz",
@ -387,290 +358,5 @@
"source-map": "^0.5.1"
}
}
},
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"version": "1.1.1",
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}
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"requires": {
"pako": "^1.0.6"
}
},
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}
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}

5
package.json
View File

@ -1,6 +1,6 @@
{
"name": "zgapdfsigner",
"version": "2.7.1",
"version": "2.7.2",
"author": "zboris12",
"description": "A javascript tool to sign a pdf or set protection to a pdf in web browser, Google Apps Script and nodejs.",
"homepage": "https://github.com/zboris12/zgapdfsigner",
@ -14,6 +14,7 @@
},
"license": "MIT",
"main": "lib/zganode.js",
"unpkg": "dist/zgapdfsigner.min.js",
"files": [
"dist/*.min.js",
"lib/*.d.ts",
@ -34,9 +35,9 @@
"test": "node test4node.js ${pfxpwd}"
},
"dependencies": {
"@pdf-lib/fontkit": "^1.1.1",
"follow-redirects": "1.15.6",
"node-forge": "1.3.1",
"pdf-fontkit": "1.8.9",
"pdf-lib": "1.17.1"
},
"devDependencies": {

3
test.html
View File

@ -5,7 +5,7 @@
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title> Test for ZgaPdfSigner </title>
<script src="https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js" type="text/javascript"></script>
<script src="https://unpkg.com/node-forge@1.3.1/dist/forge.min.js" type="text/javascript"></script>
<script src="dist/zgapdfsigner.min.js" type="text/javascript"></script>
@ -103,6 +103,7 @@ async function testMe(){
textInfo: txt ? {
text: txt,
fontData: font,
subset: true,
color: "f00",
size: 16,
align: 2,