From 26c6d1b1721c898ca4c8e686e995ed3ebefb0106 Mon Sep 17 00:00:00 2001
From: Patrizio Bekerle <patrizio@bekerle.com>
Date: Fri, 8 May 2020 08:06:32 +0200
Subject: [PATCH] Add first draft of pdf preview (#5)
---
package-lock.json | 868 +++++++++++++++++++++++++++++++++++++++++
package.json | 2 +
rollup.config.js | 9 +-
src/vpu-pdf-preview.js | 282 +++++++++++++
vendor/file-upload | 2 +-
5 files changed, 1161 insertions(+), 2 deletions(-)
create mode 100644 src/vpu-pdf-preview.js
diff --git a/package-lock.json b/package-lock.json
index 1b947d3..30a282e 100644
--- a/package-lock.json
+++ b/package-lock.json
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"dev": true
},
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"integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY=",
"dev": true
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"resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
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"dev": true
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@@ -1205,12 +1282,113 @@
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"dev": true
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+ "create-hash": "^1.1.0",
+ "evp_bytestokey": "^1.0.3",
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+ "create-hash": "^1.2.0",
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@@ -1223,12 +1401,24 @@
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"dev": true
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"dev": true
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@@ -1312,6 +1502,16 @@
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"integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
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+ "ripemd160": "^2.0.1",
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@@ -1544,6 +1789,25 @@
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+ "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-3.12.0.tgz",
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+ "inherits": "^2.0.1",
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+ "randombytes": "^2.0.0",
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},
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+ "resolved": "https://registry.npmjs.org/deferred-leveldown/-/deferred-leveldown-0.2.0.tgz",
+ "integrity": "sha1-LO8fER4cV4cNi7uK8mUOWHzS9bQ=",
+ "dev": true,
+ "requires": {
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"dev": true
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+ "brorand": "^1.0.1",
+ "hash.js": "^1.0.0",
+ "hmac-drbg": "^1.0.0",
+ "inherits": "^2.0.1",
+ "minimalistic-assert": "^1.0.0",
+ "minimalistic-crypto-utils": "^1.0.0"
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+ "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
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+ }
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"dev": true
},
+ "errno": {
+ "version": "0.1.7",
+ "resolved": "https://registry.npmjs.org/errno/-/errno-0.1.7.tgz",
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+ "dev": true,
+ "requires": {
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"version": "1.17.5",
"resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.5.tgz",
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"dev": true
},
+ "evp_bytestokey": {
+ "version": "1.0.3",
+ "resolved": "https://registry.npmjs.org/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz",
+ "integrity": "sha512-/f2Go4TognH/KvCISP7OUsHn85hT9nUkxxA9BEWxFn+Oj9o8ZNLm/40hdlgSLyuOimsrTKLUMEorQexp/aPQeA==",
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+ "version": "3.0.17",
+ "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.17.tgz",
+ "integrity": "sha512-U/il5MsrZp7mGg3mSQfn742na2T+1/vHDCG5/iTI3X9MKUuYUZVLQhyRsg06mCgDBTd57TxzgZt7P+fYfjRLtA==",
+ "dev": true,
+ "requires": {
+ "create-hash": "^1.1.2",
+ "create-hmac": "^1.1.4",
+ "ripemd160": "^2.0.1",
+ "safe-buffer": "^5.0.1",
+ "sha.js": "^2.4.8"
+ }
+ },
+ "pdfjs-dist": {
+ "version": "2.4.456",
+ "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-2.4.456.tgz",
+ "integrity": "sha512-yckJEHq3F48hcp6wStEpbN9McOj328Ib09UrBlGAKxvN2k+qYPN5iq6TH6jD1C0pso7zTep+g/CKsYgdrQd5QA=="
+ },
"pend": {
"version": "1.2.0",
"resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
@@ -4058,6 +4829,12 @@
"integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
"dev": true
},
+ "process-es6": {
+ "version": "0.11.6",
+ "resolved": "https://registry.npmjs.org/process-es6/-/process-es6-0.11.6.tgz",
+ "integrity": "sha1-xrs4n5qVH4K9TrFpYAEFvS/5x3g=",
+ "dev": true
+ },
"process-nextick-args": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -4075,6 +4852,34 @@
"integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==",
"dev": true
},
+ "prr": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/prr/-/prr-1.0.1.tgz",
+ "integrity": "sha1-0/wRS6BplaRexok/SEzrHXj19HY=",
+ "dev": true
+ },
+ "public-encrypt": {
+ "version": "4.0.3",
+ "resolved": "https://registry.npmjs.org/public-encrypt/-/public-encrypt-4.0.3.tgz",
+ "integrity": "sha512-zVpa8oKZSz5bTMTFClc1fQOnyyEzpl5ozpi1B5YcvBrdohMjH2rfsBtyXcuNuwjsDIXmBYlF2N5FlJYhR29t8Q==",
+ "dev": true,
+ "requires": {
+ "bn.js": "^4.1.0",
+ "browserify-rsa": "^4.0.0",
+ "create-hash": "^1.1.0",
+ "parse-asn1": "^5.0.0",
+ "randombytes": "^2.0.1",
+ "safe-buffer": "^5.1.2"
+ },
+ "dependencies": {
+ "bn.js": {
+ "version": "4.11.8",
+ "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
+ "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
+ "dev": true
+ }
+ }
+ },
"pump": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/pump/-/pump-2.0.1.tgz",
@@ -4143,6 +4948,25 @@
"integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==",
"dev": true
},
+ "randombytes": {
+ "version": "2.1.0",
+ "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
+ "integrity": "sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==",
+ "dev": true,
+ "requires": {
+ "safe-buffer": "^5.1.0"
+ }
+ },
+ "randomfill": {
+ "version": "1.0.4",
+ "resolved": "https://registry.npmjs.org/randomfill/-/randomfill-1.0.4.tgz",
+ "integrity": "sha512-87lcbR8+MhcWcUiQ+9e+Rwx8MyR2P7qnt15ynUlbm3TU/fjbgz4GsvfSUDTemtCCtVCqb4ZcEFlyPNTh9bBTLw==",
+ "dev": true,
+ "requires": {
+ "randombytes": "^2.0.5",
+ "safe-buffer": "^5.1.0"
+ }
+ },
"range-parser": {
"version": "1.2.1",
"resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -4411,6 +5235,16 @@
"glob": "^7.1.3"
}
},
+ "ripemd160": {
+ "version": "2.0.2",
+ "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-2.0.2.tgz",
+ "integrity": "sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==",
+ "dev": true,
+ "requires": {
+ "hash-base": "^3.0.0",
+ "inherits": "^2.0.1"
+ }
+ },
"rollup": {
"version": "2.7.5",
"resolved": "https://registry.npmjs.org/rollup/-/rollup-2.7.5.tgz",
@@ -4501,6 +5335,18 @@
}
}
},
+ "rollup-plugin-node-builtins": {
+ "version": "2.1.2",
+ "resolved": "https://registry.npmjs.org/rollup-plugin-node-builtins/-/rollup-plugin-node-builtins-2.1.2.tgz",
+ "integrity": "sha1-JKH+1KQyV7a2Q3HYq8bOGrFFl+k=",
+ "dev": true,
+ "requires": {
+ "browserify-fs": "^1.0.0",
+ "buffer-es6": "^4.9.2",
+ "crypto-browserify": "^3.11.0",
+ "process-es6": "^0.11.2"
+ }
+ },
"rollup-plugin-serve": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/rollup-plugin-serve/-/rollup-plugin-serve-1.0.1.tgz",
@@ -4614,6 +5460,16 @@
"integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==",
"dev": true
},
+ "sha.js": {
+ "version": "2.4.11",
+ "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+ "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
+ "dev": true,
+ "requires": {
+ "inherits": "^2.0.1",
+ "safe-buffer": "^5.0.1"
+ }
+ },
"shallow-clone": {
"version": "3.0.1",
"resolved": "https://registry.npmjs.org/shallow-clone/-/shallow-clone-3.0.1.tgz",
@@ -4931,6 +5787,12 @@
}
}
},
+ "string-range": {
+ "version": "1.2.2",
+ "resolved": "https://registry.npmjs.org/string-range/-/string-range-1.2.2.tgz",
+ "integrity": "sha1-qJPtNH5yKZvIO++78qaSqNI51d0=",
+ "dev": true
+ },
"string-width": {
"version": "4.2.0",
"resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
@@ -5255,6 +6117,12 @@
"integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
"dev": true
},
+ "typedarray-to-buffer": {
+ "version": "1.0.4",
+ "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-1.0.4.tgz",
+ "integrity": "sha1-m7i6DoQfs/TPH+fCRenz+opf6Zw=",
+ "dev": true
+ },
"ua-parser-js": {
"version": "0.7.21",
"resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.21.tgz",
diff --git a/package.json b/package.json
index 58ea6ce..d8b89f7 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
"rollup-plugin-copy": "^3.3.0",
"rollup-plugin-delete": "^1.2.0",
"rollup-plugin-emit-ejs": "^3.0.0",
+ "rollup-plugin-node-builtins": "^2.1.2",
"rollup-plugin-serve": "^1.0.1",
"rollup-plugin-terser": "^5.2.0",
"selfsigned": "^1.10.7"
@@ -46,6 +47,7 @@
"jszip": "^3.4.0",
"lit-element": "^2.3.1",
"lit-html": "^1.2.1",
+ "pdfjs-dist": "^2.4.456",
"source-sans-pro": "^2.45.0",
"universal-router": "^9.0.1",
"vpu-app-shell": "file:./vendor/app-shell",
diff --git a/rollup.config.js b/rollup.config.js
index 63eeed7..a754af8 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -3,6 +3,7 @@ import fs from 'fs';
import url from 'url';
import glob from 'glob';
import resolve from '@rollup/plugin-node-resolve';
+import builtins from "rollup-plugin-node-builtins";
import commonjs from '@rollup/plugin-commonjs';
import copy from 'rollup-plugin-copy';
import {terser} from "rollup-plugin-terser";
@@ -167,6 +168,7 @@ export default {
format: 'esm',
sourcemap: true
},
+ // external: ['zlib', 'http', 'fs', 'https', 'url'],
manualChunks: useManualChunks ? getManualChunks(pkg) : false,
onwarn: function (warning, warn) {
// ignore "suggestions" warning re "use strict"
@@ -218,8 +220,11 @@ export default {
customResolveOptions: {
// ignore node_modules from vendored packages
moduleDirectory: path.join(process.cwd(), 'node_modules')
- }
+ },
+ browser: true,
+ preferBuiltins: true
}),
+ builtins(),
commonjs({
include: 'node_modules/**',
namedExports: {
@@ -247,6 +252,8 @@ export default {
{src: 'assets/*.css', dest: 'dist/local/' + pkg.name},
{src: 'assets/*.ico', dest: 'dist/local/' + pkg.name},
{src: 'assets/*.svg', dest: 'dist/local/' + pkg.name},
+ // {src: 'assets/pdfjs/*.js', dest: 'dist/local/' + pkg.name + '/pdfjs'},
+ {src: 'node_modules/pdfjs-dist/build/pdf.worker.min.js', dest: 'dist/local/' + pkg.name + '/pdfjs'},
{src: 'node_modules/source-sans-pro/WOFF2/OTF/*', dest: 'dist/local/' + pkg.name + '/fonts'},
{src: 'node_modules/vpu-common/src/spinner.js', dest: 'dist/local/' + pkg.name, rename: 'spinner.js'},
{src: 'node_modules/vpu-common/misc/browser-check.js', dest: 'dist/local/' + pkg.name, rename: 'browser-check.js'},
diff --git a/src/vpu-pdf-preview.js b/src/vpu-pdf-preview.js
new file mode 100644
index 0000000..7ebc73b
--- /dev/null
+++ b/src/vpu-pdf-preview.js
@@ -0,0 +1,282 @@
+import {createI18nInstance} from './i18n.js';
+import {css, html} from 'lit-element';
+import {ScopedElementsMixin} from '@open-wc/scoped-elements';
+import VPULitElement from 'vpu-common/vpu-lit-element';
+import * as commonUtils from "vpu-common/utils";
+// import * as commonStyles from 'vpu-common/styles';
+
+// import './pdfjs/pdf';
+import pdfjs from 'pdfjs-dist';
+
+
+//import '../assets/pdfjs/pdf';
+// import pdfjsLib from './pdfjs/pdf';
+// import pdfjs from '../assets/pdfjs/pdf';
+// import zlib;
+
+// import pdfjsLib from 'pdfjs-dist';
+// import pdfjs from '../node_modules/pdfjs-dist/lib/pdf';
+// import pdfjs from '../node_modules/pdfjs-dist/build/pdf';
+
+const i18n = createI18nInstance();
+
+
+/**
+ * PdfPreview web component
+ */
+export class PdfPreview extends ScopedElementsMixin(VPULitElement) {
+ constructor() {
+ super();
+ this.lang = 'de';
+ this._PDF_DOC = null;
+ this._CURRENT_PAGE = 0;
+ this._TOTAL_PAGES = 0;
+ this._PAGE_RENDERING_IN_PROGRESS = 0;
+ this._CANVAS = null;
+ }
+
+ static get scopedElements() {
+ return {
+ // 'vpu-icon': Icon,
+ };
+ }
+
+ /**
+ * See: https://lit-element.polymer-project.org/guide/properties#initialize
+ */
+ static get properties() {
+ return {
+ lang: { type: String },
+ };
+ }
+
+
+ update(changedProperties) {
+ changedProperties.forEach((oldValue, propName) => {
+ switch (propName) {
+ case "lang":
+ i18n.changeLanguage(this.lang);
+ break;
+ }
+ });
+
+ super.update(changedProperties);
+ }
+
+ connectedCallback() {
+ super.connectedCallback();
+ const that = this;
+
+ // commonUtils.initAssetBaseURL('vpu-person-select-src');
+ // const select2CSS = commonUtils.getAssetURL(select2CSSPath);
+
+ // TODO: use commonUtils.getAssetURL to get correct path
+ pdfjs.GlobalWorkerOptions.workerSrc =
+ "/dist/local/vpu-signature/pdfjs/pdf.worker.min.js";
+
+ this.updateComplete.then(() => {
+ that._CANVAS = that._('#pdf-canvas');
+
+ this._('#upload-pdf-input').addEventListener('change', function() {
+ const url = URL.createObjectURL(Array.from(this.files)[0]);
+ // that.showPDF(url);
+ that.showPDF(this.files[0]);
+ });
+
+ // click on the "Previous" page button
+ this._("#pdf-prev").addEventListener('click', function() {
+ if(that._CURRENT_PAGE !== 1)
+ that.showPage(--that._CURRENT_PAGE);
+ });
+
+ // click on the "Next" page button
+ this._("#pdf-next").addEventListener('click', function() {
+ if(that._CURRENT_PAGE !== that._TOTAL_PAGES)
+ that.showPage(++that._CURRENT_PAGE);
+ });
+
+ // click on the "First" page button
+ this._("#pdf-first").addEventListener('click', function() {
+ that.showPage(1);
+ });
+
+ // click on the "Last" page button
+ this._("#pdf-last").addEventListener('click', function() {
+ that.showPage(that._TOTAL_PAGES);
+ });
+
+ // change on page input
+ this._("#pdf-page-no").addEventListener('input', function() {
+ const page_no = parseInt(that._("#pdf-page-no").value);
+ console.log('page_no = ', page_no);
+ if (page_no > 0 && page_no <= that._TOTAL_PAGES) {
+ that.showPage(page_no);
+ }
+ });
+
+ });
+ }
+
+ // initialize and load the PDF
+ async showPDF(file) {
+ let reader = new FileReader();
+
+ reader.onload = async () => {
+ const data = reader.result;
+ this._("#pdf-loader").style.display = 'block';
+
+ // try {
+ // await pdfjs.getDocument({data: pdf_url}).then((pdf) => {
+ // console.log(pdf);
+ // this._PDF_DOC = pdf;
+ //
+ // // total pages in pdf
+ // this._TOTAL_PAGES = this._PDF_DOC.numPages;
+ //
+ // // Hide the pdf loader and show pdf container
+ // this._("#pdf-loader").style.display = 'none';
+ // this._("#pdf-contents").style.display = 'block';
+ // this._("#pdf-total-pages").innerHTML = this._TOTAL_PAGES;
+ //
+ // // show the first page
+ // this.showPage(1);
+ // });
+ // }
+ // catch(error) {
+ // alert(error.message);
+ // }
+
+ // get handle of pdf document
+ try {
+ // console.log(data);
+ // this._PDF_DOC = await pdfjsLib.getDocument({ url: pdf_url });
+ // this._PDF_DOC = await pdfjs.pdfjsLib.getDocument({ url: pdf_url });
+ this._PDF_DOC = await pdfjs.getDocument({data: data}).promise;
+ // this._PDF_DOC = await pdfjs.getDocument({ url: pdf_url });
+ } catch (error) {
+ alert(error);
+ }
+
+ // total pages in pdf
+ this._TOTAL_PAGES = this._PDF_DOC.numPages;
+
+ // Hide the pdf loader and show pdf container
+ this._("#pdf-loader").style.display = 'none';
+ this._("#pdf-contents").style.display = 'block';
+ this._("#pdf-total-pages").innerHTML = this._TOTAL_PAGES;
+
+ // show the first page
+ this.showPage(1);
+ };
+
+ reader.readAsBinaryString(file);
+ }
+
+ // load and render specific page of the PDF
+ async showPage(page_no) {
+ const that = this;
+ this._PAGE_RENDERING_IN_PROGRESS = 1;
+ this._CURRENT_PAGE = page_no;
+
+ // disable Previous & Next buttons while page is being loaded
+ this._("#pdf-next").disabled = true;
+ this._("#pdf-prev").disabled = true;
+
+ // while page is being rendered hide the canvas and show a loading message
+ this._("#pdf-canvas").style.display = 'none';
+ this._("#page-loader").style.display = 'block';
+
+ // update current page
+ this._("#pdf-current-page").innerHTML = page_no;
+ this._("#pdf-page-no").value = page_no;
+
+ console.log(page_no);
+ // get handle of page
+
+ try {
+ this._PDF_DOC.getPage(page_no).then(async (page) => {
+ // you can now use *page* here
+ console.log("page");
+ console.log(page);
+
+ // original width of the pdf page at scale 1
+ var pdf_original_width = page.getViewport({ scale: 1 }).width;
+
+ // as the canvas is of a fixed width we need to adjust the scale of the viewport where page is rendered
+ var scale_required = this._CANVAS.width / pdf_original_width;
+
+ // get viewport to render the page at required scale
+ var viewport = page.getViewport({ scale: scale_required });
+
+ // set canvas height same as viewport height
+ this._CANVAS.height = viewport.height;
+
+ // setting page loader height for smooth experience
+ this._("#page-loader").style.height = this._CANVAS.height + 'px';
+ this._("#page-loader").style.lineHeight = this._CANVAS.height + 'px';
+
+ // page is rendered on <canvas> element
+ const render_context = {
+ canvasContext: this._CANVAS.getContext('2d'),
+ viewport: viewport
+ };
+
+ // render the page contents in the canvas
+ try {
+ page.render(render_context).promise.then(() => {
+ console.log('Page rendered');
+ that._PAGE_RENDERING_IN_PROGRESS = 0;
+
+ // re-enable Previous & Next buttons
+ that._("#pdf-next").disabled = false;
+ that._("#pdf-prev").disabled = false;
+
+ // show the canvas and hide the page loader
+ that._("#pdf-canvas").style.display = 'block';
+ that._("#page-loader").style.display = 'none';
+ });
+ }
+ catch(error) {
+ alert(error.message);
+ }
+ });
+ }
+ catch(error) {
+ alert(error.message);
+ }
+ }
+
+ static get styles() {
+ // language=css
+ return css`
+
+ `;
+ }
+
+ render() {
+ return html`
+ <form>
+ <input type="file" name="pdf" id="upload-pdf-input">
+ </form>
+ <div id="pdf-main-container">
+ <div id="pdf-loader">Loading document ...</div>
+ <div id="pdf-contents">
+ <div id="pdf-meta">
+ <div id="pdf-buttons">
+ <button id="pdf-first">First</button>
+ <button id="pdf-prev">Previous</button>
+ <input type="number" id="pdf-page-no">
+ <button id="pdf-next">Next</button>
+ <button id="pdf-last">Last</button>
+ </div>
+ <div id="page-count-container">Page <div id="pdf-current-page"></div> of <div id="pdf-total-pages"></div></div>
+ </div>
+ <canvas id="pdf-canvas" width="400"></canvas>
+ <div id="page-loader">Loading page ...</div>
+ </div>
+ </div>
+ `;
+ }
+}
+
+commonUtils.defineCustomElement('vpu-pdf-preview', PdfPreview);
diff --git a/vendor/file-upload b/vendor/file-upload
index df74ef2..87decfd 160000
--- a/vendor/file-upload
+++ b/vendor/file-upload
@@ -1 +1 @@
-Subproject commit df74ef234eac20ab9ec2d6a03f54a746f357d675
+Subproject commit 87decfdaf136064dddff4ed357d37e68cd192733
--
GitLab