103 lines
3.1 KiB
JavaScript
103 lines
3.1 KiB
JavaScript
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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/*
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The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED.
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http://www.denso-wave.com/qrcode/faqpatent-e.html
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Coding ideas were taken from JavaScript-HTML5 QRCode Generator,
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copyright (c) 2011 by Amanuel Tewolde, licensed under MIT license.
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http://www.opensource.org/licenses/mit-license.php
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*/
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// initialization for QR Code window
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// [qr code creation / error handling]
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// build and show qr code
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function createQRCode(text) {
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// settings
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var QRCodeVersion = 4;
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var dotsize = 6;
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// create qrcode
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// [when storing longer strings, verify if QRCodeVersion is still sufficient -> catch errors]
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var qrcode = new QRCode(QRCodeVersion, QRErrorCorrectLevel.H);
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qrcode.addData(text);
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qrcode.make();
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var qrsize = qrcode.getModuleCount();
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// HTML5 capable browsers
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if( window.opener.OSRM.Browser.IE6_8 == -1 ) {
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// fill canvas
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var canvas = document.createElement("canvas");
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canvas.setAttribute('height', dotsize*qrsize );
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canvas.setAttribute('width', dotsize*qrsize );
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var context = canvas.getContext('2d');
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for (var x = 0; x < qrsize; x++)
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for (var y = 0; y < qrsize; y++) {
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if (qrcode.isDark(y, x))
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context.fillStyle = "rgb(0,0,0)";
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else
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context.fillStyle = "rgb(255,255,255)";
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context.fillRect ( x*dotsize, y*dotsize, dotsize, dotsize);
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}
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// create png
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var image = document.createElement("img");
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image.id = "qrcode";
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image.src = canvas.toDataURL("image/png");
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document.getElementById("qrcode-container").appendChild(image);
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// IE8...
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} else {
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// fill table
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var html = "";
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html += "<table class='qrcode'>";
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for (var y = 0; y < qrsize; y++) {
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html += "<tr>";
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for (var x = 0; x < qrsize; x++) {
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if (qrcode.isDark(y, x))
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html += "<td class='black'/>";
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else
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html += "<td class='white'/>";
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}
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html += "</tr>";
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}
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html += "</table>";
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// add html to window
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document.getElementById("qrcode-container").innerHTML = html;
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}
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document.getElementById("qrcode-link").innerHTML = text;
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}
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// populate window with qrcode or with error message
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function onLoad() {
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if( window.opener.OSRM.G.active_shortlink )
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createQRCode(window.opener.OSRM.G.active_shortlink);
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else
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createErrorMessage();
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}
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//start populating the window when it is fully loaded - and only if it was loaded from OSRM
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if(window.opener && window.opener.OSRM)
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window.opener.OSRM.Browser.onLoadHandler( onLoad, window );
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