Compare commits
2 Commits
83bc11bac6
...
3664fbc593
| Author | SHA1 | Date | |
|---|---|---|---|
| 3664fbc593 | |||
| f01d056795 |
1
camera/static/js/qrcodegen.js
Symbolic link
1
camera/static/js/qrcodegen.js
Symbolic link
|
|
@ -0,0 +1 @@
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../../../external/qr-code-generator/qrcodegen.js
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@ -14,7 +14,7 @@ body.justVideo {
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right: 0;
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float: right;
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}
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#qrcodelink img {
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#qrcodelink svg path {
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min-width: 30vw;
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max-width: 100vw;
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max-height: 50vh;
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@ -42,6 +42,9 @@ form label {
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#status {
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display: table;
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}
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body.justVideo #status {
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display: none;
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}
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#status .log-entry {
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display: block;
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background: lightblue;
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@ -52,11 +55,24 @@ form label {
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background: lightyellow;
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}
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</style>
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<script type="text/javascript" src="static/js/qrcode.js"></script>
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<script type="text/javascript" src="static/js/qrcodegen.js"></script>
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</head>
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<body>
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<a id="qrcodelink" style="display:none;"><div id="qrcode"></div></a>
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<a id="qrcodelink" style="display:none;">
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<svg xmlns="http://www.w3.org/2000/svg" id="qrcode" style="width:30em; height:30em;" stroke="none">
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<rect width="100%" height="100%" fill="#FFFFFF"/>
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<path d="" fill="#000000"/>
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</svg>
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</a>
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<div id="qrcodemessage" style="display:none;">
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<!-- TODO Add copy button. -->
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<div id="qrcodemsg"></div>
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</div>
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<form name="settings">
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<label>
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Serverless mode:
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<input name="serverless" type="checkbox" value="true" />
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</label>
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<label>
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Recieve remote video:
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<select name="client-video">
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@ -95,11 +111,14 @@ form label {
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</div>
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<script >
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const create = (container, type) => container.appendChild(document.createElement(type));
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const QRGen = qrcodegen.QrCode;
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const body = document.querySelector("body");
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const out = document.getElementById("status");
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const qrcode = document.getElementById("qrcode");
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const qrcodelink = document.getElementById("qrcodelink");
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const qrcodemsg = document.getElementById("qrcodemsg");
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const qrcodemessage = document.getElementById("qrcodemessage");
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const remoteView = document.getElementById("remoteView");
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const selfView = document.getElementById("selfView");
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const start = document.getElementById("start");
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@ -117,6 +136,10 @@ form label {
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}
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function logPre(str) {
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if (!str) {
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_log('undefined', 'pre');
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return;
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}
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_log(str.split('\\r\\n').join('\r\n'), 'pre');
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}
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@ -143,9 +166,30 @@ form label {
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});
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}
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function isServerless() {
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return settings && 'serverless' in settings && settings.serverless;
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}
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function withHash(hash) {
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return window.location.href.split('#')[0] + '#' + hash;
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}
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function displayQRUrl(url) {
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qrcodelink.href = url;
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const qr = QRGen.encodeText(url, QRGen.Ecc.MEDIUM);
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const code = qr.toSvgString(4);
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const viewBox = (/ viewBox="([^"]*)"/.exec(code))[1];
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const pathD = (/ d="([^"]*)"/.exec(code))[1];
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qrcode.setAttribute("viewBox", viewBox);
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qrcode.querySelector("path").setAttribute("d", pathD);
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qrcodelink.style.display = '';
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}
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function displayQRUrlForObj(obj) {
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displayQRUrl(withHash('^' + btoa(JSON.stringify(obj))))
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}
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let roomName = window.location.hash;
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let isHost = roomName === undefined || !roomName;
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if (roomName.startsWith("#{")) {
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if (roomName && roomName.startsWith("#{")) {
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roomName = undefined;
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isHost = true;
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@ -167,6 +211,25 @@ form label {
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log("Failed to read settings from hash: " + error);
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}
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}
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var firstMessage = undefined;
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if (roomName && roomName.startsWith("#^")) {
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roomName = undefined;
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isHost = false;
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try {
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const hash = decodeURI(window.location.hash);
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log("Reading first message from hash:");
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logPre(hash);
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log("Decoded base64:");
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const decoded = atob(hash.substring(2));
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logPre(decoded);
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firstMessage = JSON.parse(decoded);
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settings = firstMessage.settings;
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} catch (error) {
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log("Failed to read message from hash: " + error);
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}
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}
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if (isHost) {
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// From https://stackoverflow.com/a/1349426
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function makeid(length) {
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@ -179,12 +242,14 @@ form label {
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return result;
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}
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roomName = makeid(8);
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qrcodelink.href = window.location.href.split('#')[0] + '#' + roomName;
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new QRCode(qrcode, qrcodelink.href);
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qrcodelink.style.display = '';
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if (!isServerless()) {
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roomName = makeid(8);
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displayQRUrl(withHash(roomName));
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}
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} else {
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roomName = roomName.substring(1);
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if (!isServerless()) {
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roomName = roomName.substring(1);
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}
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qrcodelink.style.display = 'none';
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form.style.display = 'none';
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}
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@ -197,10 +262,15 @@ form label {
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const toSend = JSON.stringify(data);
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log("Sending message...");
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logPre(toSend);
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webSocket.send(toSend);
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if (isServerless()) {
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} else {
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webSocket.send(toSend);
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}
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}
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var pc = undefined;
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var localDescriptionSet = false;
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function createRTCPeerConnection() {
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const pc = new RTCPeerConnection();
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log("Created RTCPeerConnection.");
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@ -208,17 +278,30 @@ form label {
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pc.addEventListener('icegatheringstatechange', e => {
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log("In pc.icegatheringstatechange... e.target.iceGatheringState="
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+ e.target.iceGatheringState);
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if (!startStreamingDone || !localDescriptionSet) return;
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// In serverless mode, host transmits first.
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// In server mode, client transmits first.
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if ((isServerless() != isHost) && !handledOffer) return;
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// Don't send offer until all ICE candidates are generated.
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if (e.target.iceGatheringState === 'complete') {
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sendJson({
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description: pc.localDescription
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});
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if (isHost && isServerless()) {
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displayQRUrlForObj({
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settings: settings,
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description: pc.localDescription
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});
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} else {
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sendJson({
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description: pc.localDescription
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});
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}
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}
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});
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pc.onnegotiationneeded = async function () {
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localDescriptionSet = false;
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log("In pc.onnegotiationneeded...");
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await pc.setLocalDescription(await pc.createOffer());
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localDescriptionSet = true;
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}
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pc.ontrack = ({streams: [stream]}) => {
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@ -230,7 +313,6 @@ form label {
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if (stream.getVideoTracks().length > 0) {
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remoteView.style.display = '';
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out.style.display = 'none';
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form.style.display = 'none';
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videos.style.display = '';
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body.classList.add('justVideo');
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@ -240,6 +322,8 @@ form label {
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return pc;
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}
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var startStreamingDone = false;
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var remoteDesc = null;
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// get a local stream, show it in a self-view and add it to be sent
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async function startStreaming(fromButton) {
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const otherAudioSettings = isHost
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@ -264,7 +348,7 @@ form label {
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}
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start.style.display = 'none';
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if (isHost) {
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if (isHost && !isServerless()) {
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sendJson({
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settings: settings
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});
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@ -279,31 +363,45 @@ form label {
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? true
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: { advanced: [{facingMode: videoSettings}] };
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log("Created videoConstraints.");
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if (!videoConstraints && !audioSettings) return;
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const stream = videoSettings == 'screen'
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? await navigator.mediaDevices.getDisplayMedia({
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audio: audioSettings,
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video: true
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})
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: await navigator.mediaDevices.getUserMedia({
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audio: audioSettings,
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video: videoConstraints
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});
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log("Created stream.");
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if (videoConstraints) {
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selfView.srcObject = stream;
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selfView.style.display = '';
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if (videoConstraints || audioSettings) {
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const stream = videoSettings == 'screen'
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? await navigator.mediaDevices.getDisplayMedia({
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audio: audioSettings,
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video: true
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})
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: await navigator.mediaDevices.getUserMedia({
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audio: audioSettings,
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video: videoConstraints
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});
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log("Created stream.");
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if (videoConstraints) {
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selfView.srcObject = stream;
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selfView.style.display = '';
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}
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for (const track of stream.getTracks()) {
|
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log("Added track.");
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pc.addTrack(track, stream);
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}
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}
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for (const track of stream.getTracks()) {
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log("Added track.");
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pc.addTrack(track, stream);
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else if (isServerless() && isHost) {
|
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log("No audio/video host.");
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//sendJson({description: pc.localDescription});
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await pc.setLocalDescription(await pc.createAnswer());
|
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}
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startStreamingDone = true;
|
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}
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function startStartingWithErorrHandling(fromButton) {
|
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function startStartingWithErorrHandling(fromButton, description) {
|
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startStreaming(fromButton)
|
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.then(() => {
|
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log("startStreaming() finished.");
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if (!description && remoteDesc) {
|
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description = remoteDesc;
|
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remoteDesc = null;
|
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}
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if (description) {
|
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handleOffer(description);
|
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}
|
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})
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.catch(e => {
|
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log("startStreaming() errored: " + e.message);
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@ -314,6 +412,16 @@ form label {
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startStartingWithErorrHandling(true)
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});
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|
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var handledOffer = false;
|
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async function handleOffer(description) {
|
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await pc.setRemoteDescription(description);
|
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if (description.type == "offer") {
|
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log("Got an offer...");
|
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await pc.setLocalDescription(await pc.createAnswer());
|
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handledOffer = true;
|
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}
|
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}
|
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|
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async function receiveMessage(e) {
|
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qrcode.style.display = 'none';
|
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log("In webSocket.onmessage...");
|
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@ -324,12 +432,16 @@ form label {
|
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startStartingWithErorrHandling(false);
|
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} else if (data.settings) {
|
||||
settings = data.settings;
|
||||
startStartingWithErorrHandling(false);
|
||||
if ('description' in data) {
|
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startStartingWithErorrHandling(false, data.description);
|
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} else {
|
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startStartingWithErorrHandling(false);
|
||||
}
|
||||
} else if (data.description) {
|
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await pc.setRemoteDescription(data.description);
|
||||
if (data.description.type == "offer") {
|
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log("Got an offer...");
|
||||
await pc.setLocalDescription(await pc.createAnswer());
|
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if (startStreamingDone) {
|
||||
handleOffer(data.description);
|
||||
} else {
|
||||
remoteDesc = data.description;
|
||||
}
|
||||
} else if (data.candidate) {
|
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log("Adding ice candidate...");
|
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|
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@ -359,10 +471,14 @@ form label {
|
|||
return webSocket;
|
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}
|
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|
||||
webSocket = createWebSocket();
|
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if (!isServerless()) {
|
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webSocket = createWebSocket();
|
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|
||||
if (!isHost) {
|
||||
webSocket.onopen = _ => sendJson({requestSettings: true});
|
||||
if (!isHost) {
|
||||
webSocket.onopen = _ => sendJson({requestSettings: true});
|
||||
}
|
||||
} else if (isHost) {
|
||||
startStartingWithErorrHandling(false);
|
||||
}
|
||||
|
||||
log("Finished <script> block.");
|
||||
|
|
|
|||
4
external/qr-code-generator/README
vendored
Normal file
4
external/qr-code-generator/README
vendored
Normal file
|
|
@ -0,0 +1,4 @@
|
|||
Source: https://github.com/nayuki/QR-Code-generator
|
||||
Downloaded from https://www.nayuki.io/res/qr-code-generator-library/qrcodegen.js
|
||||
|
||||
MIT Licensed
|
||||
902
external/qr-code-generator/qrcodegen.js
vendored
Normal file
902
external/qr-code-generator/qrcodegen.js
vendored
Normal file
|
|
@ -0,0 +1,902 @@
|
|||
/*
|
||||
* QR Code generator library (compiled from TypeScript)
|
||||
*
|
||||
* Copyright (c) 2019 Project Nayuki. (MIT License)
|
||||
* https://www.nayuki.io/page/qr-code-generator-library
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||||
* this software and associated documentation files (the "Software"), to deal in
|
||||
* the Software without restriction, including without limitation the rights to
|
||||
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
||||
* the Software, and to permit persons to whom the Software is furnished to do so,
|
||||
* subject to the following conditions:
|
||||
* - The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
* - The Software is provided "as is", without warranty of any kind, express or
|
||||
* implied, including but not limited to the warranties of merchantability,
|
||||
* fitness for a particular purpose and noninfringement. In no event shall the
|
||||
* authors or copyright holders be liable for any claim, damages or other
|
||||
* liability, whether in an action of contract, tort or otherwise, arising from,
|
||||
* out of or in connection with the Software or the use or other dealings in the
|
||||
* Software.
|
||||
*/
|
||||
"use strict";
|
||||
var qrcodegen;
|
||||
(function (qrcodegen) {
|
||||
/*---- QR Code symbol class ----*/
|
||||
/*
|
||||
* A QR Code symbol, which is a type of two-dimension barcode.
|
||||
* Invented by Denso Wave and described in the ISO/IEC 18004 standard.
|
||||
* Instances of this class represent an immutable square grid of black and white cells.
|
||||
* The class provides static factory functions to create a QR Code from text or binary data.
|
||||
* The class covers the QR Code Model 2 specification, supporting all versions (sizes)
|
||||
* from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
|
||||
*
|
||||
* Ways to create a QR Code object:
|
||||
* - High level: Take the payload data and call QrCode.encodeText() or QrCode.encodeBinary().
|
||||
* - Mid level: Custom-make the list of segments and call QrCode.encodeSegments().
|
||||
* - Low level: Custom-make the array of data codeword bytes (including
|
||||
* segment headers and final padding, excluding error correction codewords),
|
||||
* supply the appropriate version number, and call the QrCode() constructor.
|
||||
* (Note that all ways require supplying the desired error correction level.)
|
||||
*/
|
||||
var QrCode = /** @class */ (function () {
|
||||
/*-- Constructor (low level) and fields --*/
|
||||
// Creates a new QR Code with the given version number,
|
||||
// error correction level, data codeword bytes, and mask number.
|
||||
// This is a low-level API that most users should not use directly.
|
||||
// A mid-level API is the encodeSegments() function.
|
||||
function QrCode(
|
||||
// The version number of this QR Code, which is between 1 and 40 (inclusive).
|
||||
// This determines the size of this barcode.
|
||||
version,
|
||||
// The error correction level used in this QR Code.
|
||||
errorCorrectionLevel, dataCodewords,
|
||||
// The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive).
|
||||
// Even if a QR Code is created with automatic masking requested (mask = -1),
|
||||
// the resulting object still has a mask value between 0 and 7.
|
||||
mask) {
|
||||
this.version = version;
|
||||
this.errorCorrectionLevel = errorCorrectionLevel;
|
||||
this.mask = mask;
|
||||
// The modules of this QR Code (false = white, true = black).
|
||||
// Immutable after constructor finishes. Accessed through getModule().
|
||||
this.modules = [];
|
||||
// Indicates function modules that are not subjected to masking. Discarded when constructor finishes.
|
||||
this.isFunction = [];
|
||||
// Check scalar arguments
|
||||
if (version < QrCode.MIN_VERSION || version > QrCode.MAX_VERSION)
|
||||
throw "Version value out of range";
|
||||
if (mask < -1 || mask > 7)
|
||||
throw "Mask value out of range";
|
||||
this.size = version * 4 + 17;
|
||||
// Initialize both grids to be size*size arrays of Boolean false
|
||||
var row = [];
|
||||
for (var i = 0; i < this.size; i++)
|
||||
row.push(false);
|
||||
for (var i = 0; i < this.size; i++) {
|
||||
this.modules.push(row.slice()); // Initially all white
|
||||
this.isFunction.push(row.slice());
|
||||
}
|
||||
// Compute ECC, draw modules
|
||||
this.drawFunctionPatterns();
|
||||
var allCodewords = this.addEccAndInterleave(dataCodewords);
|
||||
this.drawCodewords(allCodewords);
|
||||
// Do masking
|
||||
if (mask == -1) { // Automatically choose best mask
|
||||
var minPenalty = 1000000000;
|
||||
for (var i = 0; i < 8; i++) {
|
||||
this.applyMask(i);
|
||||
this.drawFormatBits(i);
|
||||
var penalty = this.getPenaltyScore();
|
||||
if (penalty < minPenalty) {
|
||||
mask = i;
|
||||
minPenalty = penalty;
|
||||
}
|
||||
this.applyMask(i); // Undoes the mask due to XOR
|
||||
}
|
||||
}
|
||||
if (mask < 0 || mask > 7)
|
||||
throw "Assertion error";
|
||||
this.mask = mask;
|
||||
this.applyMask(mask); // Apply the final choice of mask
|
||||
this.drawFormatBits(mask); // Overwrite old format bits
|
||||
this.isFunction = [];
|
||||
}
|
||||
/*-- Static factory functions (high level) --*/
|
||||
// Returns a QR Code representing the given Unicode text string at the given error correction level.
|
||||
// As a conservative upper bound, this function is guaranteed to succeed for strings that have 738 or fewer
|
||||
// Unicode code points (not UTF-16 code units) if the low error correction level is used. The smallest possible
|
||||
// QR Code version is automatically chosen for the output. The ECC level of the result may be higher than the
|
||||
// ecl argument if it can be done without increasing the version.
|
||||
QrCode.encodeText = function (text, ecl) {
|
||||
var segs = qrcodegen.QrSegment.makeSegments(text);
|
||||
return QrCode.encodeSegments(segs, ecl);
|
||||
};
|
||||
// Returns a QR Code representing the given binary data at the given error correction level.
|
||||
// This function always encodes using the binary segment mode, not any text mode. The maximum number of
|
||||
// bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output.
|
||||
// The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version.
|
||||
QrCode.encodeBinary = function (data, ecl) {
|
||||
var seg = qrcodegen.QrSegment.makeBytes(data);
|
||||
return QrCode.encodeSegments([seg], ecl);
|
||||
};
|
||||
/*-- Static factory functions (mid level) --*/
|
||||
// Returns a QR Code representing the given segments with the given encoding parameters.
|
||||
// The smallest possible QR Code version within the given range is automatically
|
||||
// chosen for the output. Iff boostEcl is true, then the ECC level of the result
|
||||
// may be higher than the ecl argument if it can be done without increasing the
|
||||
// version. The mask number is either between 0 to 7 (inclusive) to force that
|
||||
// mask, or -1 to automatically choose an appropriate mask (which may be slow).
|
||||
// This function allows the user to create a custom sequence of segments that switches
|
||||
// between modes (such as alphanumeric and byte) to encode text in less space.
|
||||
// This is a mid-level API; the high-level API is encodeText() and encodeBinary().
|
||||
QrCode.encodeSegments = function (segs, ecl, minVersion, maxVersion, mask, boostEcl) {
|
||||
if (minVersion === void 0) { minVersion = 1; }
|
||||
if (maxVersion === void 0) { maxVersion = 40; }
|
||||
if (mask === void 0) { mask = -1; }
|
||||
if (boostEcl === void 0) { boostEcl = true; }
|
||||
if (!(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION)
|
||||
|| mask < -1 || mask > 7)
|
||||
throw "Invalid value";
|
||||
// Find the minimal version number to use
|
||||
var version;
|
||||
var dataUsedBits;
|
||||
for (version = minVersion;; version++) {
|
||||
var dataCapacityBits_1 = QrCode.getNumDataCodewords(version, ecl) * 8; // Number of data bits available
|
||||
var usedBits = QrSegment.getTotalBits(segs, version);
|
||||
if (usedBits <= dataCapacityBits_1) {
|
||||
dataUsedBits = usedBits;
|
||||
break; // This version number is found to be suitable
|
||||
}
|
||||
if (version >= maxVersion) // All versions in the range could not fit the given data
|
||||
throw "Data too long";
|
||||
}
|
||||
// Increase the error correction level while the data still fits in the current version number
|
||||
for (var _i = 0, _a = [QrCode.Ecc.MEDIUM, QrCode.Ecc.QUARTILE, QrCode.Ecc.HIGH]; _i < _a.length; _i++) { // From low to high
|
||||
var newEcl = _a[_i];
|
||||
if (boostEcl && dataUsedBits <= QrCode.getNumDataCodewords(version, newEcl) * 8)
|
||||
ecl = newEcl;
|
||||
}
|
||||
// Concatenate all segments to create the data bit string
|
||||
var bb = [];
|
||||
for (var _b = 0, segs_1 = segs; _b < segs_1.length; _b++) {
|
||||
var seg = segs_1[_b];
|
||||
appendBits(seg.mode.modeBits, 4, bb);
|
||||
appendBits(seg.numChars, seg.mode.numCharCountBits(version), bb);
|
||||
for (var _c = 0, _d = seg.getData(); _c < _d.length; _c++) {
|
||||
var b = _d[_c];
|
||||
bb.push(b);
|
||||
}
|
||||
}
|
||||
if (bb.length != dataUsedBits)
|
||||
throw "Assertion error";
|
||||
// Add terminator and pad up to a byte if applicable
|
||||
var dataCapacityBits = QrCode.getNumDataCodewords(version, ecl) * 8;
|
||||
if (bb.length > dataCapacityBits)
|
||||
throw "Assertion error";
|
||||
appendBits(0, Math.min(4, dataCapacityBits - bb.length), bb);
|
||||
appendBits(0, (8 - bb.length % 8) % 8, bb);
|
||||
if (bb.length % 8 != 0)
|
||||
throw "Assertion error";
|
||||
// Pad with alternating bytes until data capacity is reached
|
||||
for (var padByte = 0xEC; bb.length < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
|
||||
appendBits(padByte, 8, bb);
|
||||
// Pack bits into bytes in big endian
|
||||
var dataCodewords = [];
|
||||
while (dataCodewords.length * 8 < bb.length)
|
||||
dataCodewords.push(0);
|
||||
bb.forEach(function (b, i) {
|
||||
return dataCodewords[i >>> 3] |= b << (7 - (i & 7));
|
||||
});
|
||||
// Create the QR Code object
|
||||
return new QrCode(version, ecl, dataCodewords, mask);
|
||||
};
|
||||
/*-- Accessor methods --*/
|
||||
// Returns the color of the module (pixel) at the given coordinates, which is false
|
||||
// for white or true for black. The top left corner has the coordinates (x=0, y=0).
|
||||
// If the given coordinates are out of bounds, then false (white) is returned.
|
||||
QrCode.prototype.getModule = function (x, y) {
|
||||
return 0 <= x && x < this.size && 0 <= y && y < this.size && this.modules[y][x];
|
||||
};
|
||||
/*-- Public instance methods --*/
|
||||
// Draws this QR Code, with the given module scale and border modules, onto the given HTML
|
||||
// canvas element. The canvas's width and height is resized to (this.size + border * 2) * scale.
|
||||
// The drawn image is be purely black and white, and fully opaque.
|
||||
// The scale must be a positive integer and the border must be a non-negative integer.
|
||||
QrCode.prototype.drawCanvas = function (scale, border, canvas) {
|
||||
if (scale <= 0 || border < 0)
|
||||
throw "Value out of range";
|
||||
var width = (this.size + border * 2) * scale;
|
||||
canvas.width = width;
|
||||
canvas.height = width;
|
||||
var ctx = canvas.getContext("2d");
|
||||
for (var y = -border; y < this.size + border; y++) {
|
||||
for (var x = -border; x < this.size + border; x++) {
|
||||
ctx.fillStyle = this.getModule(x, y) ? "#000000" : "#FFFFFF";
|
||||
ctx.fillRect((x + border) * scale, (y + border) * scale, scale, scale);
|
||||
}
|
||||
}
|
||||
};
|
||||
// Returns a string of SVG code for an image depicting this QR Code, with the given number
|
||||
// of border modules. The string always uses Unix newlines (\n), regardless of the platform.
|
||||
QrCode.prototype.toSvgString = function (border) {
|
||||
if (border < 0)
|
||||
throw "Border must be non-negative";
|
||||
var parts = [];
|
||||
for (var y = 0; y < this.size; y++) {
|
||||
for (var x = 0; x < this.size; x++) {
|
||||
if (this.getModule(x, y))
|
||||
parts.push("M" + (x + border) + "," + (y + border) + "h1v1h-1z");
|
||||
}
|
||||
}
|
||||
return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" viewBox=\"0 0 " + (this.size + border * 2) + " " + (this.size + border * 2) + "\" stroke=\"none\">\n\t<rect width=\"100%\" height=\"100%\" fill=\"#FFFFFF\"/>\n\t<path d=\"" + parts.join(" ") + "\" fill=\"#000000\"/>\n</svg>\n";
|
||||
};
|
||||
/*-- Private helper methods for constructor: Drawing function modules --*/
|
||||
// Reads this object's version field, and draws and marks all function modules.
|
||||
QrCode.prototype.drawFunctionPatterns = function () {
|
||||
// Draw horizontal and vertical timing patterns
|
||||
for (var i = 0; i < this.size; i++) {
|
||||
this.setFunctionModule(6, i, i % 2 == 0);
|
||||
this.setFunctionModule(i, 6, i % 2 == 0);
|
||||
}
|
||||
// Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
|
||||
this.drawFinderPattern(3, 3);
|
||||
this.drawFinderPattern(this.size - 4, 3);
|
||||
this.drawFinderPattern(3, this.size - 4);
|
||||
// Draw numerous alignment patterns
|
||||
var alignPatPos = this.getAlignmentPatternPositions();
|
||||
var numAlign = alignPatPos.length;
|
||||
for (var i = 0; i < numAlign; i++) {
|
||||
for (var j = 0; j < numAlign; j++) {
|
||||
// Don't draw on the three finder corners
|
||||
if (!(i == 0 && j == 0 || i == 0 && j == numAlign - 1 || i == numAlign - 1 && j == 0))
|
||||
this.drawAlignmentPattern(alignPatPos[i], alignPatPos[j]);
|
||||
}
|
||||
}
|
||||
// Draw configuration data
|
||||
this.drawFormatBits(0); // Dummy mask value; overwritten later in the constructor
|
||||
this.drawVersion();
|
||||
};
|
||||
// Draws two copies of the format bits (with its own error correction code)
|
||||
// based on the given mask and this object's error correction level field.
|
||||
QrCode.prototype.drawFormatBits = function (mask) {
|
||||
// Calculate error correction code and pack bits
|
||||
var data = this.errorCorrectionLevel.formatBits << 3 | mask; // errCorrLvl is uint2, mask is uint3
|
||||
var rem = data;
|
||||
for (var i = 0; i < 10; i++)
|
||||
rem = (rem << 1) ^ ((rem >>> 9) * 0x537);
|
||||
var bits = (data << 10 | rem) ^ 0x5412; // uint15
|
||||
if (bits >>> 15 != 0)
|
||||
throw "Assertion error";
|
||||
// Draw first copy
|
||||
for (var i = 0; i <= 5; i++)
|
||||
this.setFunctionModule(8, i, getBit(bits, i));
|
||||
this.setFunctionModule(8, 7, getBit(bits, 6));
|
||||
this.setFunctionModule(8, 8, getBit(bits, 7));
|
||||
this.setFunctionModule(7, 8, getBit(bits, 8));
|
||||
for (var i = 9; i < 15; i++)
|
||||
this.setFunctionModule(14 - i, 8, getBit(bits, i));
|
||||
// Draw second copy
|
||||
for (var i = 0; i < 8; i++)
|
||||
this.setFunctionModule(this.size - 1 - i, 8, getBit(bits, i));
|
||||
for (var i = 8; i < 15; i++)
|
||||
this.setFunctionModule(8, this.size - 15 + i, getBit(bits, i));
|
||||
this.setFunctionModule(8, this.size - 8, true); // Always black
|
||||
};
|
||||
// Draws two copies of the version bits (with its own error correction code),
|
||||
// based on this object's version field, iff 7 <= version <= 40.
|
||||
QrCode.prototype.drawVersion = function () {
|
||||
if (this.version < 7)
|
||||
return;
|
||||
// Calculate error correction code and pack bits
|
||||
var rem = this.version; // version is uint6, in the range [7, 40]
|
||||
for (var i = 0; i < 12; i++)
|
||||
rem = (rem << 1) ^ ((rem >>> 11) * 0x1F25);
|
||||
var bits = this.version << 12 | rem; // uint18
|
||||
if (bits >>> 18 != 0)
|
||||
throw "Assertion error";
|
||||
// Draw two copies
|
||||
for (var i = 0; i < 18; i++) {
|
||||
var color = getBit(bits, i);
|
||||
var a = this.size - 11 + i % 3;
|
||||
var b = Math.floor(i / 3);
|
||||
this.setFunctionModule(a, b, color);
|
||||
this.setFunctionModule(b, a, color);
|
||||
}
|
||||
};
|
||||
// Draws a 9*9 finder pattern including the border separator,
|
||||
// with the center module at (x, y). Modules can be out of bounds.
|
||||
QrCode.prototype.drawFinderPattern = function (x, y) {
|
||||
for (var dy = -4; dy <= 4; dy++) {
|
||||
for (var dx = -4; dx <= 4; dx++) {
|
||||
var dist = Math.max(Math.abs(dx), Math.abs(dy)); // Chebyshev/infinity norm
|
||||
var xx = x + dx;
|
||||
var yy = y + dy;
|
||||
if (0 <= xx && xx < this.size && 0 <= yy && yy < this.size)
|
||||
this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
|
||||
}
|
||||
}
|
||||
};
|
||||
// Draws a 5*5 alignment pattern, with the center module
|
||||
// at (x, y). All modules must be in bounds.
|
||||
QrCode.prototype.drawAlignmentPattern = function (x, y) {
|
||||
for (var dy = -2; dy <= 2; dy++) {
|
||||
for (var dx = -2; dx <= 2; dx++)
|
||||
this.setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dx), Math.abs(dy)) != 1);
|
||||
}
|
||||
};
|
||||
// Sets the color of a module and marks it as a function module.
|
||||
// Only used by the constructor. Coordinates must be in bounds.
|
||||
QrCode.prototype.setFunctionModule = function (x, y, isBlack) {
|
||||
this.modules[y][x] = isBlack;
|
||||
this.isFunction[y][x] = true;
|
||||
};
|
||||
/*-- Private helper methods for constructor: Codewords and masking --*/
|
||||
// Returns a new byte string representing the given data with the appropriate error correction
|
||||
// codewords appended to it, based on this object's version and error correction level.
|
||||
QrCode.prototype.addEccAndInterleave = function (data) {
|
||||
var ver = this.version;
|
||||
var ecl = this.errorCorrectionLevel;
|
||||
if (data.length != QrCode.getNumDataCodewords(ver, ecl))
|
||||
throw "Invalid argument";
|
||||
// Calculate parameter numbers
|
||||
var numBlocks = QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
|
||||
var blockEccLen = QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver];
|
||||
var rawCodewords = Math.floor(QrCode.getNumRawDataModules(ver) / 8);
|
||||
var numShortBlocks = numBlocks - rawCodewords % numBlocks;
|
||||
var shortBlockLen = Math.floor(rawCodewords / numBlocks);
|
||||
// Split data into blocks and append ECC to each block
|
||||
var blocks = [];
|
||||
var rsDiv = QrCode.reedSolomonComputeDivisor(blockEccLen);
|
||||
for (var i = 0, k = 0; i < numBlocks; i++) {
|
||||
var dat = data.slice(k, k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1));
|
||||
k += dat.length;
|
||||
var ecc = QrCode.reedSolomonComputeRemainder(dat, rsDiv);
|
||||
if (i < numShortBlocks)
|
||||
dat.push(0);
|
||||
blocks.push(dat.concat(ecc));
|
||||
}
|
||||
// Interleave (not concatenate) the bytes from every block into a single sequence
|
||||
var result = [];
|
||||
for (var i = 0; i < blocks[0].length; i++) {
|
||||
for (var j = 0; j < blocks.length; j++) {
|
||||
// Skip the padding byte in short blocks
|
||||
if (i != shortBlockLen - blockEccLen || j >= numShortBlocks)
|
||||
result.push(blocks[j][i]);
|
||||
}
|
||||
}
|
||||
if (result.length != rawCodewords)
|
||||
throw "Assertion error";
|
||||
return result;
|
||||
};
|
||||
// Draws the given sequence of 8-bit codewords (data and error correction) onto the entire
|
||||
// data area of this QR Code. Function modules need to be marked off before this is called.
|
||||
QrCode.prototype.drawCodewords = function (data) {
|
||||
if (data.length != Math.floor(QrCode.getNumRawDataModules(this.version) / 8))
|
||||
throw "Invalid argument";
|
||||
var i = 0; // Bit index into the data
|
||||
// Do the funny zigzag scan
|
||||
for (var right = this.size - 1; right >= 1; right -= 2) { // Index of right column in each column pair
|
||||
if (right == 6)
|
||||
right = 5;
|
||||
for (var vert = 0; vert < this.size; vert++) { // Vertical counter
|
||||
for (var j = 0; j < 2; j++) {
|
||||
var x = right - j; // Actual x coordinate
|
||||
var upward = ((right + 1) & 2) == 0;
|
||||
var y = upward ? this.size - 1 - vert : vert; // Actual y coordinate
|
||||
if (!this.isFunction[y][x] && i < data.length * 8) {
|
||||
this.modules[y][x] = getBit(data[i >>> 3], 7 - (i & 7));
|
||||
i++;
|
||||
}
|
||||
// If this QR Code has any remainder bits (0 to 7), they were assigned as
|
||||
// 0/false/white by the constructor and are left unchanged by this method
|
||||
}
|
||||
}
|
||||
}
|
||||
if (i != data.length * 8)
|
||||
throw "Assertion error";
|
||||
};
|
||||
// XORs the codeword modules in this QR Code with the given mask pattern.
|
||||
// The function modules must be marked and the codeword bits must be drawn
|
||||
// before masking. Due to the arithmetic of XOR, calling applyMask() with
|
||||
// the same mask value a second time will undo the mask. A final well-formed
|
||||
// QR Code needs exactly one (not zero, two, etc.) mask applied.
|
||||
QrCode.prototype.applyMask = function (mask) {
|
||||
if (mask < 0 || mask > 7)
|
||||
throw "Mask value out of range";
|
||||
for (var y = 0; y < this.size; y++) {
|
||||
for (var x = 0; x < this.size; x++) {
|
||||
var invert = void 0;
|
||||
switch (mask) {
|
||||
case 0:
|
||||
invert = (x + y) % 2 == 0;
|
||||
break;
|
||||
case 1:
|
||||
invert = y % 2 == 0;
|
||||
break;
|
||||
case 2:
|
||||
invert = x % 3 == 0;
|
||||
break;
|
||||
case 3:
|
||||
invert = (x + y) % 3 == 0;
|
||||
break;
|
||||
case 4:
|
||||
invert = (Math.floor(x / 3) + Math.floor(y / 2)) % 2 == 0;
|
||||
break;
|
||||
case 5:
|
||||
invert = x * y % 2 + x * y % 3 == 0;
|
||||
break;
|
||||
case 6:
|
||||
invert = (x * y % 2 + x * y % 3) % 2 == 0;
|
||||
break;
|
||||
case 7:
|
||||
invert = ((x + y) % 2 + x * y % 3) % 2 == 0;
|
||||
break;
|
||||
default: throw "Assertion error";
|
||||
}
|
||||
if (!this.isFunction[y][x] && invert)
|
||||
this.modules[y][x] = !this.modules[y][x];
|
||||
}
|
||||
}
|
||||
};
|
||||
// Calculates and returns the penalty score based on state of this QR Code's current modules.
|
||||
// This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
|
||||
QrCode.prototype.getPenaltyScore = function () {
|
||||
var result = 0;
|
||||
// Adjacent modules in row having same color, and finder-like patterns
|
||||
for (var y = 0; y < this.size; y++) {
|
||||
var runColor = false;
|
||||
var runX = 0;
|
||||
var runHistory = [0, 0, 0, 0, 0, 0, 0];
|
||||
var padRun = this.size;
|
||||
for (var x = 0; x < this.size; x++) {
|
||||
if (this.modules[y][x] == runColor) {
|
||||
runX++;
|
||||
if (runX == 5)
|
||||
result += QrCode.PENALTY_N1;
|
||||
else if (runX > 5)
|
||||
result++;
|
||||
}
|
||||
else {
|
||||
QrCode.finderPenaltyAddHistory(runX + padRun, runHistory);
|
||||
padRun = 0;
|
||||
if (!runColor)
|
||||
result += this.finderPenaltyCountPatterns(runHistory) * QrCode.PENALTY_N3;
|
||||
runColor = this.modules[y][x];
|
||||
runX = 1;
|
||||
}
|
||||
}
|
||||
result += this.finderPenaltyTerminateAndCount(runColor, runX + padRun, runHistory) * QrCode.PENALTY_N3;
|
||||
}
|
||||
// Adjacent modules in column having same color, and finder-like patterns
|
||||
for (var x = 0; x < this.size; x++) {
|
||||
var runColor = false;
|
||||
var runY = 0;
|
||||
var runHistory = [0, 0, 0, 0, 0, 0, 0];
|
||||
var padRun = this.size;
|
||||
for (var y = 0; y < this.size; y++) {
|
||||
if (this.modules[y][x] == runColor) {
|
||||
runY++;
|
||||
if (runY == 5)
|
||||
result += QrCode.PENALTY_N1;
|
||||
else if (runY > 5)
|
||||
result++;
|
||||
}
|
||||
else {
|
||||
QrCode.finderPenaltyAddHistory(runY + padRun, runHistory);
|
||||
padRun = 0;
|
||||
if (!runColor)
|
||||
result += this.finderPenaltyCountPatterns(runHistory) * QrCode.PENALTY_N3;
|
||||
runColor = this.modules[y][x];
|
||||
runY = 1;
|
||||
}
|
||||
}
|
||||
result += this.finderPenaltyTerminateAndCount(runColor, runY + padRun, runHistory) * QrCode.PENALTY_N3;
|
||||
}
|
||||
// 2*2 blocks of modules having same color
|
||||
for (var y = 0; y < this.size - 1; y++) {
|
||||
for (var x = 0; x < this.size - 1; x++) {
|
||||
var color = this.modules[y][x];
|
||||
if (color == this.modules[y][x + 1] &&
|
||||
color == this.modules[y + 1][x] &&
|
||||
color == this.modules[y + 1][x + 1])
|
||||
result += QrCode.PENALTY_N2;
|
||||
}
|
||||
}
|
||||
// Balance of black and white modules
|
||||
var black = 0;
|
||||
for (var _i = 0, _a = this.modules; _i < _a.length; _i++) {
|
||||
var row = _a[_i];
|
||||
for (var _b = 0, row_1 = row; _b < row_1.length; _b++) {
|
||||
var color = row_1[_b];
|
||||
if (color)
|
||||
black++;
|
||||
}
|
||||
}
|
||||
var total = this.size * this.size; // Note that size is odd, so black/total != 1/2
|
||||
// Compute the smallest integer k >= 0 such that (45-5k)% <= black/total <= (55+5k)%
|
||||
var k = Math.ceil(Math.abs(black * 20 - total * 10) / total) - 1;
|
||||
result += k * QrCode.PENALTY_N4;
|
||||
return result;
|
||||
};
|
||||
/*-- Private helper functions --*/
|
||||
// Returns an ascending list of positions of alignment patterns for this version number.
|
||||
// Each position is in the range [0,177), and are used on both the x and y axes.
|
||||
// This could be implemented as lookup table of 40 variable-length lists of integers.
|
||||
QrCode.prototype.getAlignmentPatternPositions = function () {
|
||||
if (this.version == 1)
|
||||
return [];
|
||||
else {
|
||||
var numAlign = Math.floor(this.version / 7) + 2;
|
||||
var step = (this.version == 32) ? 26 :
|
||||
Math.ceil((this.size - 13) / (numAlign * 2 - 2)) * 2;
|
||||
var result = [6];
|
||||
for (var pos = this.size - 7; result.length < numAlign; pos -= step)
|
||||
result.splice(1, 0, pos);
|
||||
return result;
|
||||
}
|
||||
};
|
||||
// Returns the number of data bits that can be stored in a QR Code of the given version number, after
|
||||
// all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
|
||||
// The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
|
||||
QrCode.getNumRawDataModules = function (ver) {
|
||||
if (ver < QrCode.MIN_VERSION || ver > QrCode.MAX_VERSION)
|
||||
throw "Version number out of range";
|
||||
var result = (16 * ver + 128) * ver + 64;
|
||||
if (ver >= 2) {
|
||||
var numAlign = Math.floor(ver / 7) + 2;
|
||||
result -= (25 * numAlign - 10) * numAlign - 55;
|
||||
if (ver >= 7)
|
||||
result -= 36;
|
||||
}
|
||||
return result;
|
||||
};
|
||||
// Returns the number of 8-bit data (i.e. not error correction) codewords contained in any
|
||||
// QR Code of the given version number and error correction level, with remainder bits discarded.
|
||||
// This stateless pure function could be implemented as a (40*4)-cell lookup table.
|
||||
QrCode.getNumDataCodewords = function (ver, ecl) {
|
||||
return Math.floor(QrCode.getNumRawDataModules(ver) / 8) -
|
||||
QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver] *
|
||||
QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
|
||||
};
|
||||
// Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be
|
||||
// implemented as a lookup table over all possible parameter values, instead of as an algorithm.
|
||||
QrCode.reedSolomonComputeDivisor = function (degree) {
|
||||
if (degree < 1 || degree > 255)
|
||||
throw "Degree out of range";
|
||||
// Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1.
|
||||
// For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the uint8 array [255, 8, 93].
|
||||
var result = [];
|
||||
for (var i = 0; i < degree - 1; i++)
|
||||
result.push(0);
|
||||
result.push(1); // Start off with the monomial x^0
|
||||
// Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}),
|
||||
// and drop the highest monomial term which is always 1x^degree.
|
||||
// Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
|
||||
var root = 1;
|
||||
for (var i = 0; i < degree; i++) {
|
||||
// Multiply the current product by (x - r^i)
|
||||
for (var j = 0; j < result.length; j++) {
|
||||
result[j] = QrCode.reedSolomonMultiply(result[j], root);
|
||||
if (j + 1 < result.length)
|
||||
result[j] ^= result[j + 1];
|
||||
}
|
||||
root = QrCode.reedSolomonMultiply(root, 0x02);
|
||||
}
|
||||
return result;
|
||||
};
|
||||
// Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials.
|
||||
QrCode.reedSolomonComputeRemainder = function (data, divisor) {
|
||||
var result = divisor.map(function (_) { return 0; });
|
||||
var _loop_1 = function (b) {
|
||||
var factor = b ^ result.shift();
|
||||
result.push(0);
|
||||
divisor.forEach(function (coef, i) {
|
||||
return result[i] ^= QrCode.reedSolomonMultiply(coef, factor);
|
||||
});
|
||||
};
|
||||
for (var _i = 0, data_1 = data; _i < data_1.length; _i++) {
|
||||
var b = data_1[_i];
|
||||
_loop_1(b);
|
||||
}
|
||||
return result;
|
||||
};
|
||||
// Returns the product of the two given field elements modulo GF(2^8/0x11D). The arguments and result
|
||||
// are unsigned 8-bit integers. This could be implemented as a lookup table of 256*256 entries of uint8.
|
||||
QrCode.reedSolomonMultiply = function (x, y) {
|
||||
if (x >>> 8 != 0 || y >>> 8 != 0)
|
||||
throw "Byte out of range";
|
||||
// Russian peasant multiplication
|
||||
var z = 0;
|
||||
for (var i = 7; i >= 0; i--) {
|
||||
z = (z << 1) ^ ((z >>> 7) * 0x11D);
|
||||
z ^= ((y >>> i) & 1) * x;
|
||||
}
|
||||
if (z >>> 8 != 0)
|
||||
throw "Assertion error";
|
||||
return z;
|
||||
};
|
||||
// Can only be called immediately after a white run is added, and
|
||||
// returns either 0, 1, or 2. A helper function for getPenaltyScore().
|
||||
QrCode.prototype.finderPenaltyCountPatterns = function (runHistory) {
|
||||
var n = runHistory[1];
|
||||
if (n > this.size * 3)
|
||||
throw "Assertion error";
|
||||
var core = n > 0 && runHistory[2] == n && runHistory[3] == n * 3 && runHistory[4] == n && runHistory[5] == n;
|
||||
return (core && runHistory[0] >= n * 4 && runHistory[6] >= n ? 1 : 0)
|
||||
+ (core && runHistory[6] >= n * 4 && runHistory[0] >= n ? 1 : 0);
|
||||
};
|
||||
// Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore().
|
||||
QrCode.prototype.finderPenaltyTerminateAndCount = function (currentRunColor, currentRunLength, runHistory) {
|
||||
if (currentRunColor) { // Terminate black run
|
||||
QrCode.finderPenaltyAddHistory(currentRunLength, runHistory);
|
||||
currentRunLength = 0;
|
||||
}
|
||||
currentRunLength += this.size; // Add white border to final run
|
||||
QrCode.finderPenaltyAddHistory(currentRunLength, runHistory);
|
||||
return this.finderPenaltyCountPatterns(runHistory);
|
||||
};
|
||||
// Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore().
|
||||
QrCode.finderPenaltyAddHistory = function (currentRunLength, runHistory) {
|
||||
runHistory.pop();
|
||||
runHistory.unshift(currentRunLength);
|
||||
};
|
||||
/*-- Constants and tables --*/
|
||||
// The minimum version number supported in the QR Code Model 2 standard.
|
||||
QrCode.MIN_VERSION = 1;
|
||||
// The maximum version number supported in the QR Code Model 2 standard.
|
||||
QrCode.MAX_VERSION = 40;
|
||||
// For use in getPenaltyScore(), when evaluating which mask is best.
|
||||
QrCode.PENALTY_N1 = 3;
|
||||
QrCode.PENALTY_N2 = 3;
|
||||
QrCode.PENALTY_N3 = 40;
|
||||
QrCode.PENALTY_N4 = 10;
|
||||
QrCode.ECC_CODEWORDS_PER_BLOCK = [
|
||||
// Version: (note that index 0 is for padding, and is set to an illegal value)
|
||||
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
|
||||
[-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
|
||||
[-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28],
|
||||
[-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
|
||||
[-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
|
||||
];
|
||||
QrCode.NUM_ERROR_CORRECTION_BLOCKS = [
|
||||
// Version: (note that index 0 is for padding, and is set to an illegal value)
|
||||
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
|
||||
[-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25],
|
||||
[-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49],
|
||||
[-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68],
|
||||
[-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81],
|
||||
];
|
||||
return QrCode;
|
||||
}());
|
||||
qrcodegen.QrCode = QrCode;
|
||||
// Appends the given number of low-order bits of the given value
|
||||
// to the given buffer. Requires 0 <= len <= 31 and 0 <= val < 2^len.
|
||||
function appendBits(val, len, bb) {
|
||||
if (len < 0 || len > 31 || val >>> len != 0)
|
||||
throw "Value out of range";
|
||||
for (var i = len - 1; i >= 0; i--) // Append bit by bit
|
||||
bb.push((val >>> i) & 1);
|
||||
}
|
||||
// Returns true iff the i'th bit of x is set to 1.
|
||||
function getBit(x, i) {
|
||||
return ((x >>> i) & 1) != 0;
|
||||
}
|
||||
/*---- Data segment class ----*/
|
||||
/*
|
||||
* A segment of character/binary/control data in a QR Code symbol.
|
||||
* Instances of this class are immutable.
|
||||
* The mid-level way to create a segment is to take the payload data
|
||||
* and call a static factory function such as QrSegment.makeNumeric().
|
||||
* The low-level way to create a segment is to custom-make the bit buffer
|
||||
* and call the QrSegment() constructor with appropriate values.
|
||||
* This segment class imposes no length restrictions, but QR Codes have restrictions.
|
||||
* Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
|
||||
* Any segment longer than this is meaningless for the purpose of generating QR Codes.
|
||||
*/
|
||||
var QrSegment = /** @class */ (function () {
|
||||
/*-- Constructor (low level) and fields --*/
|
||||
// Creates a new QR Code segment with the given attributes and data.
|
||||
// The character count (numChars) must agree with the mode and the bit buffer length,
|
||||
// but the constraint isn't checked. The given bit buffer is cloned and stored.
|
||||
function QrSegment(
|
||||
// The mode indicator of this segment.
|
||||
mode,
|
||||
// The length of this segment's unencoded data. Measured in characters for
|
||||
// numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode.
|
||||
// Always zero or positive. Not the same as the data's bit length.
|
||||
numChars,
|
||||
// The data bits of this segment. Accessed through getData().
|
||||
bitData) {
|
||||
this.mode = mode;
|
||||
this.numChars = numChars;
|
||||
this.bitData = bitData;
|
||||
if (numChars < 0)
|
||||
throw "Invalid argument";
|
||||
this.bitData = bitData.slice(); // Make defensive copy
|
||||
}
|
||||
/*-- Static factory functions (mid level) --*/
|
||||
// Returns a segment representing the given binary data encoded in
|
||||
// byte mode. All input byte arrays are acceptable. Any text string
|
||||
// can be converted to UTF-8 bytes and encoded as a byte mode segment.
|
||||
QrSegment.makeBytes = function (data) {
|
||||
var bb = [];
|
||||
for (var _i = 0, data_2 = data; _i < data_2.length; _i++) {
|
||||
var b = data_2[_i];
|
||||
appendBits(b, 8, bb);
|
||||
}
|
||||
return new QrSegment(QrSegment.Mode.BYTE, data.length, bb);
|
||||
};
|
||||
// Returns a segment representing the given string of decimal digits encoded in numeric mode.
|
||||
QrSegment.makeNumeric = function (digits) {
|
||||
if (!this.NUMERIC_REGEX.test(digits))
|
||||
throw "String contains non-numeric characters";
|
||||
var bb = [];
|
||||
for (var i = 0; i < digits.length;) { // Consume up to 3 digits per iteration
|
||||
var n = Math.min(digits.length - i, 3);
|
||||
appendBits(parseInt(digits.substr(i, n), 10), n * 3 + 1, bb);
|
||||
i += n;
|
||||
}
|
||||
return new QrSegment(QrSegment.Mode.NUMERIC, digits.length, bb);
|
||||
};
|
||||
// Returns a segment representing the given text string encoded in alphanumeric mode.
|
||||
// The characters allowed are: 0 to 9, A to Z (uppercase only), space,
|
||||
// dollar, percent, asterisk, plus, hyphen, period, slash, colon.
|
||||
QrSegment.makeAlphanumeric = function (text) {
|
||||
if (!this.ALPHANUMERIC_REGEX.test(text))
|
||||
throw "String contains unencodable characters in alphanumeric mode";
|
||||
var bb = [];
|
||||
var i;
|
||||
for (i = 0; i + 2 <= text.length; i += 2) { // Process groups of 2
|
||||
var temp = QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)) * 45;
|
||||
temp += QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i + 1));
|
||||
appendBits(temp, 11, bb);
|
||||
}
|
||||
if (i < text.length) // 1 character remaining
|
||||
appendBits(QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6, bb);
|
||||
return new QrSegment(QrSegment.Mode.ALPHANUMERIC, text.length, bb);
|
||||
};
|
||||
// Returns a new mutable list of zero or more segments to represent the given Unicode text string.
|
||||
// The result may use various segment modes and switch modes to optimize the length of the bit stream.
|
||||
QrSegment.makeSegments = function (text) {
|
||||
// Select the most efficient segment encoding automatically
|
||||
if (text == "")
|
||||
return [];
|
||||
else if (this.NUMERIC_REGEX.test(text))
|
||||
return [QrSegment.makeNumeric(text)];
|
||||
else if (this.ALPHANUMERIC_REGEX.test(text))
|
||||
return [QrSegment.makeAlphanumeric(text)];
|
||||
else
|
||||
return [QrSegment.makeBytes(QrSegment.toUtf8ByteArray(text))];
|
||||
};
|
||||
// Returns a segment representing an Extended Channel Interpretation
|
||||
// (ECI) designator with the given assignment value.
|
||||
QrSegment.makeEci = function (assignVal) {
|
||||
var bb = [];
|
||||
if (assignVal < 0)
|
||||
throw "ECI assignment value out of range";
|
||||
else if (assignVal < (1 << 7))
|
||||
appendBits(assignVal, 8, bb);
|
||||
else if (assignVal < (1 << 14)) {
|
||||
appendBits(2, 2, bb);
|
||||
appendBits(assignVal, 14, bb);
|
||||
}
|
||||
else if (assignVal < 1000000) {
|
||||
appendBits(6, 3, bb);
|
||||
appendBits(assignVal, 21, bb);
|
||||
}
|
||||
else
|
||||
throw "ECI assignment value out of range";
|
||||
return new QrSegment(QrSegment.Mode.ECI, 0, bb);
|
||||
};
|
||||
/*-- Methods --*/
|
||||
// Returns a new copy of the data bits of this segment.
|
||||
QrSegment.prototype.getData = function () {
|
||||
return this.bitData.slice(); // Make defensive copy
|
||||
};
|
||||
// (Package-private) Calculates and returns the number of bits needed to encode the given segments at
|
||||
// the given version. The result is infinity if a segment has too many characters to fit its length field.
|
||||
QrSegment.getTotalBits = function (segs, version) {
|
||||
var result = 0;
|
||||
for (var _i = 0, segs_2 = segs; _i < segs_2.length; _i++) {
|
||||
var seg = segs_2[_i];
|
||||
var ccbits = seg.mode.numCharCountBits(version);
|
||||
if (seg.numChars >= (1 << ccbits))
|
||||
return Infinity; // The segment's length doesn't fit the field's bit width
|
||||
result += 4 + ccbits + seg.bitData.length;
|
||||
}
|
||||
return result;
|
||||
};
|
||||
// Returns a new array of bytes representing the given string encoded in UTF-8.
|
||||
QrSegment.toUtf8ByteArray = function (str) {
|
||||
str = encodeURI(str);
|
||||
var result = [];
|
||||
for (var i = 0; i < str.length; i++) {
|
||||
if (str.charAt(i) != "%")
|
||||
result.push(str.charCodeAt(i));
|
||||
else {
|
||||
result.push(parseInt(str.substr(i + 1, 2), 16));
|
||||
i += 2;
|
||||
}
|
||||
}
|
||||
return result;
|
||||
};
|
||||
/*-- Constants --*/
|
||||
// Describes precisely all strings that are encodable in numeric mode. To test
|
||||
// whether a string s is encodable: let ok: boolean = NUMERIC_REGEX.test(s);
|
||||
// A string is encodable iff each character is in the range 0 to 9.
|
||||
QrSegment.NUMERIC_REGEX = /^[0-9]*$/;
|
||||
// Describes precisely all strings that are encodable in alphanumeric mode. To test
|
||||
// whether a string s is encodable: let ok: boolean = ALPHANUMERIC_REGEX.test(s);
|
||||
// A string is encodable iff each character is in the following set: 0 to 9, A to Z
|
||||
// (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
|
||||
QrSegment.ALPHANUMERIC_REGEX = /^[A-Z0-9 $%*+.\/:-]*$/;
|
||||
// The set of all legal characters in alphanumeric mode,
|
||||
// where each character value maps to the index in the string.
|
||||
QrSegment.ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
|
||||
return QrSegment;
|
||||
}());
|
||||
qrcodegen.QrSegment = QrSegment;
|
||||
})(qrcodegen || (qrcodegen = {}));
|
||||
/*---- Public helper enumeration ----*/
|
||||
(function (qrcodegen) {
|
||||
var QrCode;
|
||||
(function (QrCode) {
|
||||
/*
|
||||
* The error correction level in a QR Code symbol. Immutable.
|
||||
*/
|
||||
var Ecc = /** @class */ (function () {
|
||||
/*-- Constructor and fields --*/
|
||||
function Ecc(
|
||||
// In the range 0 to 3 (unsigned 2-bit integer).
|
||||
ordinal,
|
||||
// (Package-private) In the range 0 to 3 (unsigned 2-bit integer).
|
||||
formatBits) {
|
||||
this.ordinal = ordinal;
|
||||
this.formatBits = formatBits;
|
||||
}
|
||||
/*-- Constants --*/
|
||||
Ecc.LOW = new Ecc(0, 1); // The QR Code can tolerate about 7% erroneous codewords
|
||||
Ecc.MEDIUM = new Ecc(1, 0); // The QR Code can tolerate about 15% erroneous codewords
|
||||
Ecc.QUARTILE = new Ecc(2, 3); // The QR Code can tolerate about 25% erroneous codewords
|
||||
Ecc.HIGH = new Ecc(3, 2); // The QR Code can tolerate about 30% erroneous codewords
|
||||
return Ecc;
|
||||
}());
|
||||
QrCode.Ecc = Ecc;
|
||||
})(QrCode = qrcodegen.QrCode || (qrcodegen.QrCode = {}));
|
||||
})(qrcodegen || (qrcodegen = {}));
|
||||
/*---- Public helper enumeration ----*/
|
||||
(function (qrcodegen) {
|
||||
var QrSegment;
|
||||
(function (QrSegment) {
|
||||
/*
|
||||
* Describes how a segment's data bits are interpreted. Immutable.
|
||||
*/
|
||||
var Mode = /** @class */ (function () {
|
||||
/*-- Constructor and fields --*/
|
||||
function Mode(
|
||||
// The mode indicator bits, which is a uint4 value (range 0 to 15).
|
||||
modeBits,
|
||||
// Number of character count bits for three different version ranges.
|
||||
numBitsCharCount) {
|
||||
this.modeBits = modeBits;
|
||||
this.numBitsCharCount = numBitsCharCount;
|
||||
}
|
||||
/*-- Method --*/
|
||||
// (Package-private) Returns the bit width of the character count field for a segment in
|
||||
// this mode in a QR Code at the given version number. The result is in the range [0, 16].
|
||||
Mode.prototype.numCharCountBits = function (ver) {
|
||||
return this.numBitsCharCount[Math.floor((ver + 7) / 17)];
|
||||
};
|
||||
/*-- Constants --*/
|
||||
Mode.NUMERIC = new Mode(0x1, [10, 12, 14]);
|
||||
Mode.ALPHANUMERIC = new Mode(0x2, [9, 11, 13]);
|
||||
Mode.BYTE = new Mode(0x4, [8, 16, 16]);
|
||||
Mode.KANJI = new Mode(0x8, [8, 10, 12]);
|
||||
Mode.ECI = new Mode(0x7, [0, 0, 0]);
|
||||
return Mode;
|
||||
}());
|
||||
QrSegment.Mode = Mode;
|
||||
})(QrSegment = qrcodegen.QrSegment || (qrcodegen.QrSegment = {}));
|
||||
})(qrcodegen || (qrcodegen = {}));
|
||||
Loading…
Reference in New Issue
Block a user