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241 lines
11 KiB
241 lines
11 KiB
/*
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* QR Code generator output demo (TypeScript)
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*
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* Copyright (c) Project Nayuki. (MIT License)
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* https://www.nayuki.io/page/qr-code-generator-library
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* - The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* - The Software is provided "as is", without warranty of any kind, express or
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* implied, including but not limited to the warranties of merchantability,
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* fitness for a particular purpose and noninfringement. In no event shall the
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* authors or copyright holders be liable for any claim, damages or other
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* liability, whether in an action of contract, tort or otherwise, arising from,
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* out of or in connection with the Software or the use or other dealings in the
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* Software.
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*/
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"use strict";
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namespace app {
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let outputElem = document.getElementById("output") as HTMLElement;
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// The main application program.
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function main(): void {
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while (outputElem.firstChild !== null)
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outputElem.removeChild(outputElem.firstChild);
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doBasicDemo();
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doVarietyDemo();
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doSegmentDemo();
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doMaskDemo();
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}
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// Creates a single QR Code, then appends it to the document.
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function doBasicDemo(): void {
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appendHeading("Basic");
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const text: string = "Hello, world!"; // User-supplied Unicode text
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const errCorLvl: qrcodegen.QrCode.Ecc = qrcodegen.QrCode.Ecc.LOW; // Error correction level
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const qr: qrcodegen.QrCode = qrcodegen.QrCode.encodeText(text, errCorLvl); // Make the QR Code symbol
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drawCanvas(qr, 10, 4, "#FFFFFF", "#000000", appendCanvas("hello-world-QR")); // Draw it on screen
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}
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// Creates a variety of QR Codes that exercise different features of the library, and appends each one to the document.
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function doVarietyDemo(): void {
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appendHeading("Variety");
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let qr: qrcodegen.QrCode;
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const QrCode = qrcodegen.QrCode; // Abbreviation
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// Numeric mode encoding (3.33 bits per digit)
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qr = QrCode.encodeText("314159265358979323846264338327950288419716939937510", QrCode.Ecc.MEDIUM);
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drawCanvas(qr, 13, 1, "#FFFFFF", "#000000", appendCanvas("pi-digits-QR"));
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// Alphanumeric mode encoding (5.5 bits per character)
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qr = QrCode.encodeText("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", QrCode.Ecc.HIGH);
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drawCanvas(qr, 10, 2, "#FFFFFF", "#000000", appendCanvas("alphanumeric-QR"));
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// Unicode text as UTF-8
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qr = QrCode.encodeText("\u3053\u3093\u306B\u3061wa\u3001\u4E16\u754C\uFF01 \u03B1\u03B2\u03B3\u03B4", QrCode.Ecc.QUARTILE);
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("unicode-QR"));
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// Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
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qr = QrCode.encodeText(
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"Alice was beginning to get very tired of sitting by her sister on the bank, "
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+ "and of having nothing to do: once or twice she had peeped into the book her sister was reading, "
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+ "but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice "
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+ "'without pictures or conversations?' So she was considering in her own mind (as well as she could, "
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+ "for the hot day made her feel very sleepy and stupid), whether the pleasure of making a "
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+ "daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly "
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+ "a White Rabbit with pink eyes ran close by her.", QrCode.Ecc.HIGH);
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drawCanvas(qr, 6, 10, "#FFFFFF", "#000000", appendCanvas("alice-wonderland-QR"));
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}
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// Creates QR Codes with manually specified segments for better compactness.
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function doSegmentDemo(): void {
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appendHeading("Segment");
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let qr: qrcodegen.QrCode;
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let segs: Array<qrcodegen.QrSegment>;
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const QrCode = qrcodegen.QrCode; // Abbreviation
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const QrSegment = qrcodegen.QrSegment; // Abbreviation
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// Illustration "silver"
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const silver0: string = "THE SQUARE ROOT OF 2 IS 1.";
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const silver1: string = "41421356237309504880168872420969807856967187537694807317667973799";
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qr = QrCode.encodeText(silver0 + silver1, QrCode.Ecc.LOW);
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("sqrt2-monolithic-QR"));
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segs = [
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QrSegment.makeAlphanumeric(silver0),
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QrSegment.makeNumeric(silver1)];
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.LOW);
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("sqrt2-segmented-QR"));
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// Illustration "golden"
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const golden0: string = "Golden ratio \u03C6 = 1.";
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const golden1: string = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374";
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const golden2: string = "......";
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qr = QrCode.encodeText(golden0 + golden1 + golden2, QrCode.Ecc.LOW);
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drawCanvas(qr, 8, 5, "#FFFFFF", "#000000", appendCanvas("phi-monolithic-QR"));
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segs = [
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QrSegment.makeBytes(toUtf8ByteArray(golden0)),
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QrSegment.makeNumeric(golden1),
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QrSegment.makeAlphanumeric(golden2)];
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.LOW);
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drawCanvas(qr, 8, 5, "#FFFFFF", "#000000", appendCanvas("phi-segmented-QR"));
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// Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
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const madoka: string = "\u300C\u9B54\u6CD5\u5C11\u5973\u307E\u3069\u304B\u2606\u30DE\u30AE\u30AB\u300D\u3063\u3066\u3001\u3000\u0418\u0410\u0418\u3000\uFF44\uFF45\uFF53\uFF55\u3000\u03BA\u03B1\uFF1F";
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qr = QrCode.encodeText(madoka, QrCode.Ecc.LOW);
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drawCanvas(qr, 9, 4, "#FFFFE0", "#303080", appendCanvas("madoka-utf8-QR"));
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const kanjiCharBits: Array<number> = [ // Kanji mode encoding (13 bits per character)
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0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1,
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1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
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0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
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0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1,
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0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1,
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0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0,
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0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1,
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0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1,
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0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1,
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0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1,
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0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1,
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0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0,
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0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0,
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0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1,
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0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1,
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0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1,
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0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1,
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0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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];
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segs = [new QrSegment(QrSegment.Mode.KANJI, kanjiCharBits.length / 13, kanjiCharBits)];
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.LOW);
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drawCanvas(qr, 9, 4, "#E0F0FF", "#404040", appendCanvas("madoka-kanji-QR"));
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}
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// Creates QR Codes with the same size and contents but different mask patterns.
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function doMaskDemo(): void {
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appendHeading("Mask");
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let qr: qrcodegen.QrCode;
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let segs: Array<qrcodegen.QrSegment>;
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const QrCode = qrcodegen.QrCode; // Abbreviation
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// Project Nayuki URL
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segs = qrcodegen.QrSegment.makeSegments("https://www.nayuki.io/");
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.HIGH, QrCode.MIN_VERSION, QrCode.MAX_VERSION, -1, true); // Automatic mask
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drawCanvas(qr, 8, 6, "#E0FFE0", "#206020", appendCanvas("project-nayuki-automask-QR"));
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.HIGH, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 3, true); // Force mask 3
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drawCanvas(qr, 8, 6, "#FFE0E0", "#602020", appendCanvas("project-nayuki-mask3-QR"));
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// Chinese text as UTF-8
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segs = qrcodegen.QrSegment.makeSegments("\u7DAD\u57FA\u767E\u79D1\uFF08Wikipedia\uFF0C\u8046\u807Di/\u02CCw\u026Ak\u1D7B\u02C8pi\u02D0di.\u0259/\uFF09\u662F\u4E00"
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+ "\u500B\u81EA\u7531\u5167\u5BB9\u3001\u516C\u958B\u7DE8\u8F2F\u4E14\u591A\u8A9E\u8A00\u7684\u7DB2\u8DEF\u767E\u79D1\u5168\u66F8\u5354\u4F5C\u8A08\u756B");
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.MEDIUM, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 0, true); // Force mask 0
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("unicode-mask0-QR"));
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.MEDIUM, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 1, true); // Force mask 1
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("unicode-mask1-QR"));
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.MEDIUM, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 5, true); // Force mask 5
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("unicode-mask5-QR"));
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qr = QrCode.encodeSegments(segs, QrCode.Ecc.MEDIUM, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 7, true); // Force mask 7
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drawCanvas(qr, 10, 3, "#FFFFFF", "#000000", appendCanvas("unicode-mask7-QR"));
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}
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function appendHeading(text: string): void {
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let h2 = outputElem.appendChild(document.createElement("h2"));
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h2.textContent = text;
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}
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function appendCanvas(caption: string): HTMLCanvasElement {
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let p = outputElem.appendChild(document.createElement("p"));
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p.textContent = caption + ":";
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let result = document.createElement("canvas");
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outputElem.appendChild(result);
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return result;
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}
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// Draws the given QR Code, with the given module scale and border modules, onto the given HTML
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// canvas element. The canvas's width and height is resized to (qr.size + border * 2) * scale.
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// The drawn image is purely dark and light, and fully opaque.
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// The scale must be a positive integer and the border must be a non-negative integer.
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function drawCanvas(qr: qrcodegen.QrCode, scale: number, border: number, lightColor: string, darkColor: string, canvas: HTMLCanvasElement): void {
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if (scale <= 0 || border < 0)
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throw new RangeError("Value out of range");
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const width: number = (qr.size + border * 2) * scale;
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canvas.width = width;
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canvas.height = width;
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let ctx = canvas.getContext("2d") as CanvasRenderingContext2D;
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for (let y = -border; y < qr.size + border; y++) {
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for (let x = -border; x < qr.size + border; x++) {
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ctx.fillStyle = qr.getModule(x, y) ? darkColor : lightColor;
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ctx.fillRect((x + border) * scale, (y + border) * scale, scale, scale);
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}
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}
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}
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function toUtf8ByteArray(str: string): Array<number> {
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str = encodeURI(str);
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let result: Array<number> = [];
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for (let i = 0; i < str.length; i++) {
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if (str.charAt(i) != "%")
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result.push(str.charCodeAt(i));
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else {
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result.push(parseInt(str.substring(i + 1, i + 3), 16));
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i += 2;
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}
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}
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return result;
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}
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main();
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}
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