// ==UserScript==
// @license MIT License
// ==/UserScript==
(function( $ ){
$.fn.qrcode = function(options) {
// if options is string,
if( typeof options === 'string' ){
options	= { text: options };
}
// set default values
// typeNumber < 1 for automatic calculation
options	= $.extend( {}, {
render		: "canvas",
width		: 256,
height		: 256,
typeNumber	: -1,
correctLevel	: QRErrorCorrectLevel.H,
background      : "#ffffff",
foreground      : "#000000"
}, options);
var createCanvas	= function(){
// create the qrcode itself
var qrcode	= new QRCode(options.typeNumber, options.correctLevel);
qrcode.addData(options.text);
qrcode.make();
// create canvas element
var canvas	= document.createElement('canvas');
canvas.width	= options.width;
canvas.height	= options.height;
var ctx		= canvas.getContext('2d');
// compute tileW/tileH based on options.width/options.height
var tileW	= options.width  / qrcode.getModuleCount();
var tileH	= options.height / qrcode.getModuleCount();
// draw in the canvas
for( var row = 0; row < qrcode.getModuleCount(); row++ ){
for( var col = 0; col < qrcode.getModuleCount(); col++ ){
ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));
var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));
ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h);
}
}
// return just built canvas
return canvas;
}
// from Jon-Carlos Rivera (https://github.com/imbcmdth)
var createTable	= function(){
// create the qrcode itself
var qrcode	= new QRCode(options.typeNumber, options.correctLevel);
qrcode.addData(options.text);
qrcode.make();
// create table element
var $table	= $('<table></table>')
.css("width", options.width+"px")
.css("height", options.height+"px")
.css("border", "0px")
.css("border-collapse", "collapse")
.css('background-color', options.background);
// compute tileS percentage
var tileW	= options.width / qrcode.getModuleCount();
var tileH	= options.height / qrcode.getModuleCount();
// draw in the table
for(var row = 0; row < qrcode.getModuleCount(); row++ ){
var $row = $('<tr></tr>').css('height', tileH+"px").appendTo($table);
for(var col = 0; col < qrcode.getModuleCount(); col++ ){
$('<td></td>')
.css('width', tileW+"px")
.css('background-color', qrcode.isDark(row, col) ? options.foreground : options.background)
.appendTo($row);
}
}
// return just built canvas
return $table;
}
return this.each(function(){
var element	= options.render == "canvas" ? createCanvas() : createTable();
$(element).appendTo(this);
});
};
})( jQuery );