Merge pull request #285 from ArthurHoaro/plugin-qrcode

PLUGIN QRCode

7 files changed, 1389 insertions, 0 deletions

diff --git a/plugins/qrcode/qr-1.1.3.js b/plugins/qrcode/qr-1.1.3.js
new file mode 100644
index 00000000..4f127e6e
--- /dev/null
+++ b/plugins/qrcode/qr-1.1.3.js
@@ -0,0 +1,1215 @@
+// [qr.js](http://neocotic.com/qr.js)  
+// (c) 2014 Alasdair Mercer  
+// Licensed under the GPL Version 3 license.  
+// Based on [jsqrencode](http://code.google.com/p/jsqrencode/)  
+// (c) 2010 tz@execpc.com  
+// Licensed under the GPL Version 3 license.  
+// For all details and documentation:  
+// <http://neocotic.com/qr.js>
+
+(function (root) {
+
+  'use strict';
+
+  // Private constants
+  // -----------------
+
+  // Alignment pattern.
+  var ALIGNMENT_DELTA = [
+    0,  11, 15, 19, 23, 27, 31,
+    16, 18, 20, 22, 24, 26, 28, 20, 22, 24, 24, 26, 28, 28, 22, 24, 24,
+    26, 26, 28, 28, 24, 24, 26, 26, 26, 28, 28, 24, 26, 26, 26, 28, 28
+  ];
+  // Default MIME type.
+  var DEFAULT_MIME = 'image/png';
+  // MIME used to initiate a browser download prompt when `qr.save` is called.
+  var DOWNLOAD_MIME = 'image/octet-stream';
+  // There are four elements per version. The first two indicate the number of blocks, then the
+  // data width, and finally the ECC width.
+  var ECC_BLOCKS = [
+    1,  0,  19,  7,     1,  0,  16,  10,    1,  0,  13,  13,    1,  0,  9,   17,
+    1,  0,  34,  10,    1,  0,  28,  16,    1,  0,  22,  22,    1,  0,  16,  28,
+    1,  0,  55,  15,    1,  0,  44,  26,    2,  0,  17,  18,    2,  0,  13,  22,
+    1,  0,  80,  20,    2,  0,  32,  18,    2,  0,  24,  26,    4,  0,  9,   16,
+    1,  0,  108, 26,    2,  0,  43,  24,    2,  2,  15,  18,    2,  2,  11,  22,
+    2,  0,  68,  18,    4,  0,  27,  16,    4,  0,  19,  24,    4,  0,  15,  28,
+    2,  0,  78,  20,    4,  0,  31,  18,    2,  4,  14,  18,    4,  1,  13,  26,
+    2,  0,  97,  24,    2,  2,  38,  22,    4,  2,  18,  22,    4,  2,  14,  26,
+    2,  0,  116, 30,    3,  2,  36,  22,    4,  4,  16,  20,    4,  4,  12,  24,
+    2,  2,  68,  18,    4,  1,  43,  26,    6,  2,  19,  24,    6,  2,  15,  28,
+    4,  0,  81,  20,    1,  4,  50,  30,    4,  4,  22,  28,    3,  8,  12,  24,
+    2,  2,  92,  24,    6,  2,  36,  22,    4,  6,  20,  26,    7,  4,  14,  28,
+    4,  0,  107, 26,    8,  1,  37,  22,    8,  4,  20,  24,    12, 4,  11,  22,
+    3,  1,  115, 30,    4,  5,  40,  24,    11, 5,  16,  20,    11, 5,  12,  24,
+    5,  1,  87,  22,    5,  5,  41,  24,    5,  7,  24,  30,    11, 7,  12,  24,
+    5,  1,  98,  24,    7,  3,  45,  28,    15, 2,  19,  24,    3,  13, 15,  30,
+    1,  5,  107, 28,    10, 1,  46,  28,    1,  15, 22,  28,    2,  17, 14,  28,
+    5,  1,  120, 30,    9,  4,  43,  26,    17, 1,  22,  28,    2,  19, 14,  28,
+    3,  4,  113, 28,    3,  11, 44,  26,    17, 4,  21,  26,    9,  16, 13,  26,
+    3,  5,  107, 28,    3,  13, 41,  26,    15, 5,  24,  30,    15, 10, 15,  28,
+    4,  4,  116, 28,    17, 0,  42,  26,    17, 6,  22,  28,    19, 6,  16,  30,
+    2,  7,  111, 28,    17, 0,  46,  28,    7,  16, 24,  30,    34, 0,  13,  24,
+    4,  5,  121, 30,    4,  14, 47,  28,    11, 14, 24,  30,    16, 14, 15,  30,
+    6,  4,  117, 30,    6,  14, 45,  28,    11, 16, 24,  30,    30, 2,  16,  30,
+    8,  4,  106, 26,    8,  13, 47,  28,    7,  22, 24,  30,    22, 13, 15,  30,
+    10, 2,  114, 28,    19, 4,  46,  28,    28, 6,  22,  28,    33, 4,  16,  30,
+    8,  4,  122, 30,    22, 3,  45,  28,    8,  26, 23,  30,    12, 28, 15,  30,
+    3,  10, 117, 30,    3,  23, 45,  28,    4,  31, 24,  30,    11, 31, 15,  30,
+    7,  7,  116, 30,    21, 7,  45,  28,    1,  37, 23,  30,    19, 26, 15,  30,
+    5,  10, 115, 30,    19, 10, 47,  28,    15, 25, 24,  30,    23, 25, 15,  30,
+    13, 3,  115, 30,    2,  29, 46,  28,    42, 1,  24,  30,    23, 28, 15,  30,
+    17, 0,  115, 30,    10, 23, 46,  28,    10, 35, 24,  30,    19, 35, 15,  30,
+    17, 1,  115, 30,    14, 21, 46,  28,    29, 19, 24,  30,    11, 46, 15,  30,
+    13, 6,  115, 30,    14, 23, 46,  28,    44, 7,  24,  30,    59, 1,  16,  30,
+    12, 7,  121, 30,    12, 26, 47,  28,    39, 14, 24,  30,    22, 41, 15,  30,
+    6,  14, 121, 30,    6,  34, 47,  28,    46, 10, 24,  30,    2,  64, 15,  30,
+    17, 4,  122, 30,    29, 14, 46,  28,    49, 10, 24,  30,    24, 46, 15,  30,
+    4,  18, 122, 30,    13, 32, 46,  28,    48, 14, 24,  30,    42, 32, 15,  30,
+    20, 4,  117, 30,    40, 7,  47,  28,    43, 22, 24,  30,    10, 67, 15,  30,
+    19, 6,  118, 30,    18, 31, 47,  28,    34, 34, 24,  30,    20, 61, 15,  30
+  ];
+  // Map of human-readable ECC levels.
+  var ECC_LEVELS = {
+    L: 1,
+    M: 2,
+    Q: 3,
+    H: 4
+  };
+  // Final format bits with mask (level << 3 | mask).
+  var FINAL_FORMAT = [
+    0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976, /* L */
+    0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0, /* M */
+    0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed, /* Q */
+    0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b  /* H */
+  ];
+  // Galois field exponent table.
+  var GALOIS_EXPONENT = [
+    0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26,
+    0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9, 0x8f, 0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0,
+    0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35, 0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23,
+    0x46, 0x8c, 0x05, 0x0a, 0x14, 0x28, 0x50, 0xa0, 0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1,
+    0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc, 0x65, 0xca, 0x89, 0x0f, 0x1e, 0x3c, 0x78, 0xf0,
+    0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f, 0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2,
+    0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0x0d, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce,
+    0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93, 0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc,
+    0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9, 0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54,
+    0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa, 0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73,
+    0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e, 0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff,
+    0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4, 0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41,
+    0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x07, 0x0e, 0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6,
+    0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef, 0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x09,
+    0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5, 0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0x0b, 0x16,
+    0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83, 0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x00
+  ];
+  // Galois field log table.
+  var GALOIS_LOG = [
+    0xff, 0x00, 0x01, 0x19, 0x02, 0x32, 0x1a, 0xc6, 0x03, 0xdf, 0x33, 0xee, 0x1b, 0x68, 0xc7, 0x4b,
+    0x04, 0x64, 0xe0, 0x0e, 0x34, 0x8d, 0xef, 0x81, 0x1c, 0xc1, 0x69, 0xf8, 0xc8, 0x08, 0x4c, 0x71,
+    0x05, 0x8a, 0x65, 0x2f, 0xe1, 0x24, 0x0f, 0x21, 0x35, 0x93, 0x8e, 0xda, 0xf0, 0x12, 0x82, 0x45,
+    0x1d, 0xb5, 0xc2, 0x7d, 0x6a, 0x27, 0xf9, 0xb9, 0xc9, 0x9a, 0x09, 0x78, 0x4d, 0xe4, 0x72, 0xa6,
+    0x06, 0xbf, 0x8b, 0x62, 0x66, 0xdd, 0x30, 0xfd, 0xe2, 0x98, 0x25, 0xb3, 0x10, 0x91, 0x22, 0x88,
+    0x36, 0xd0, 0x94, 0xce, 0x8f, 0x96, 0xdb, 0xbd, 0xf1, 0xd2, 0x13, 0x5c, 0x83, 0x38, 0x46, 0x40,
+    0x1e, 0x42, 0xb6, 0xa3, 0xc3, 0x48, 0x7e, 0x6e, 0x6b, 0x3a, 0x28, 0x54, 0xfa, 0x85, 0xba, 0x3d,
+    0xca, 0x5e, 0x9b, 0x9f, 0x0a, 0x15, 0x79, 0x2b, 0x4e, 0xd4, 0xe5, 0xac, 0x73, 0xf3, 0xa7, 0x57,
+    0x07, 0x70, 0xc0, 0xf7, 0x8c, 0x80, 0x63, 0x0d, 0x67, 0x4a, 0xde, 0xed, 0x31, 0xc5, 0xfe, 0x18,
+    0xe3, 0xa5, 0x99, 0x77, 0x26, 0xb8, 0xb4, 0x7c, 0x11, 0x44, 0x92, 0xd9, 0x23, 0x20, 0x89, 0x2e,
+    0x37, 0x3f, 0xd1, 0x5b, 0x95, 0xbc, 0xcf, 0xcd, 0x90, 0x87, 0x97, 0xb2, 0xdc, 0xfc, 0xbe, 0x61,
+    0xf2, 0x56, 0xd3, 0xab, 0x14, 0x2a, 0x5d, 0x9e, 0x84, 0x3c, 0x39, 0x53, 0x47, 0x6d, 0x41, 0xa2,
+    0x1f, 0x2d, 0x43, 0xd8, 0xb7, 0x7b, 0xa4, 0x76, 0xc4, 0x17, 0x49, 0xec, 0x7f, 0x0c, 0x6f, 0xf6,
+    0x6c, 0xa1, 0x3b, 0x52, 0x29, 0x9d, 0x55, 0xaa, 0xfb, 0x60, 0x86, 0xb1, 0xbb, 0xcc, 0x3e, 0x5a,
+    0xcb, 0x59, 0x5f, 0xb0, 0x9c, 0xa9, 0xa0, 0x51, 0x0b, 0xf5, 0x16, 0xeb, 0x7a, 0x75, 0x2c, 0xd7,
+    0x4f, 0xae, 0xd5, 0xe9, 0xe6, 0xe7, 0xad, 0xe8, 0x74, 0xd6, 0xf4, 0xea, 0xa8, 0x50, 0x58, 0xaf
+  ];
+  // *Badness* coefficients.
+  var N1 = 3;
+  var N2 = 3;
+  var N3 = 40;
+  var N4 = 10;
+  // Version pattern.
+  var VERSION_BLOCK = [ 
+    0xc94, 0x5bc, 0xa99, 0x4d3, 0xbf6, 0x762, 0x847, 0x60d, 0x928, 0xb78, 0x45d, 0xa17, 0x532,
+    0x9a6, 0x683, 0x8c9, 0x7ec, 0xec4, 0x1e1, 0xfab, 0x08e, 0xc1a, 0x33f, 0xd75, 0x250, 0x9d5,
+    0x6f0, 0x8ba, 0x79f, 0xb0b, 0x42e, 0xa64, 0x541, 0xc69
+  ];
+  // Mode for node.js file system file writes.
+  var WRITE_MODE = parseInt('0666', 8);
+
+  // Private variables
+  // -----------------
+
+  // Run lengths for badness.
+  var badBuffer = [];
+  // Constructor for `canvas` elements in the node.js environment.
+  var Canvas;
+  // Data block.
+  var dataBlock;
+  // ECC data blocks and tables.
+  var eccBlock, neccBlock1, neccBlock2;
+  // ECC buffer.
+  var eccBuffer = [];
+  // ECC level (defaults to **L**).
+  var eccLevel = 1;
+  // Image buffer.
+  var frameBuffer = [];
+  // Fixed part of the image.
+  var frameMask = [];
+  // File system within the node.js environment.
+  var fs;
+  // Constructor for `img` elements in the node.js environment.
+  var Image;
+  // Indicates whether or not this script is running in node.js.
+  var inNode = false;
+  // Generator polynomial.
+  var polynomial = [];
+  // Save the previous value of the `qr` variable.
+  var previousQr = root.qr;
+  // Data input buffer.
+  var stringBuffer = [];
+  // Version for the data.
+  var version;
+  // Data width is based on `version`.
+  var width;
+
+  // Private functions
+  // -----------------
+
+  // Create a new canvas  using `document.createElement` unless script is running in node.js, in
+  // which case the `canvas` module is used.
+  function createCanvas() {
+    return inNode ? new Canvas() : root.document.createElement('canvas');
+  }
+
+  // Create a new image using `document.createElement` unless script is running in node.js, in
+  // which case the `canvas` module is used.
+  function createImage() {
+    return inNode ? new Image() : root.document.createElement('img');
+  }
+
+  // Force the canvas image to be downloaded in the browser.  
+  // Optionally, a `callback` function can be specified which will be called upon completed. Since
+  // this is not an asynchronous operation, this is merely convenient and helps simplify the
+  // calling code.
+  function download(cvs, data, callback) {
+    var mime = data.mime || DEFAULT_MIME;
+
+    root.location.href = cvs.toDataURL(mime).replace(mime, DOWNLOAD_MIME);
+
+    if (typeof callback === 'function') callback();
+  }
+
+  // Normalize the `data` that is provided to the main API.
+  function normalizeData(data) {
+    if (typeof data === 'string') data = { value: data };
+    return data || {};
+  }
+
+  // Override the `qr` API methods that require HTML5 canvas support to throw a relevant error.
+  function overrideAPI(qr) {
+    var methods = [ 'canvas', 'image', 'save', 'saveSync', 'toDataURL' ];
+    var i;
+
+    function overrideMethod(name) {
+      qr[name] = function () {
+        throw new Error(name + ' requires HTML5 canvas element support');
+      };
+    }
+
+    for (i = 0; i < methods.length; i++) {
+      overrideMethod(methods[i]);
+    }
+  }
+
+  // Asynchronously write the data of the rendered canvas to a given file path.
+  function writeFile(cvs, data, callback) {
+    if (typeof data.path !== 'string') {
+      return callback(new TypeError('Invalid path type: ' + typeof data.path));
+    }
+
+    var fd, buff;
+
+    // Write the buffer to the open file stream once both prerequisites are met.
+    function writeBuffer() {
+      fs.write(fd, buff, 0, buff.length, 0, function (error) {
+        fs.close(fd);
+
+        callback(error);
+      });
+    }
+
+    // Create a buffer of the canvas' data.
+    cvs.toBuffer(function (error, _buff) {
+      if (error) return callback(error);
+
+      buff = _buff;
+      if (fd) {
+        writeBuffer();
+      }
+    });
+
+    // Open a stream for the file to be written.
+    fs.open(data.path, 'w', WRITE_MODE, function (error, _fd) {
+      if (error) return callback(error);
+
+      fd = _fd;
+      if (buff) {
+        writeBuffer();
+      }
+    });
+  }
+
+  // Write the data of the rendered canvas to a given file path.
+  function writeFileSync(cvs, data) {
+    if (typeof data.path !== 'string') {
+      throw new TypeError('Invalid path type: ' + typeof data.path);
+    }
+
+    var buff = cvs.toBuffer();
+    var fd = fs.openSync(data.path, 'w', WRITE_MODE);
+
+    try {
+      fs.writeSync(fd, buff, 0, buff.length, 0);
+    } finally {
+      fs.closeSync(fd);
+    }
+  }
+
+  // Set bit to indicate cell in frame is immutable (symmetric around diagonal).
+  function setMask(x, y) {
+    var bit;
+
+    if (x > y) {
+      bit = x;
+      x   = y;
+      y   = bit;
+    }
+
+    bit   = y;
+    bit  *= y;
+    bit  += y;
+    bit >>= 1;
+    bit  += x;
+
+    frameMask[bit] = 1;
+  }
+
+  // Enter alignment pattern. Foreground colour to frame, background to mask. Frame will be merged
+  // with mask later.
+  function addAlignment(x, y) {
+    var i;
+
+    frameBuffer[x + width * y] = 1;
+
+    for (i = -2; i < 2; i++) {
+      frameBuffer[(x + i)     + width * (y - 2)]     = 1;
+      frameBuffer[(x - 2)     + width * (y + i + 1)] = 1;
+      frameBuffer[(x + 2)     + width * (y + i)]     = 1;
+      frameBuffer[(x + i + 1) + width * (y + 2)]     = 1;
+    }
+
+    for (i = 0; i < 2; i++) {
+      setMask(x - 1, y + i);
+      setMask(x + 1, y - i);
+      setMask(x - i, y - 1);
+      setMask(x + i, y + 1);
+    }
+  }
+
+  // Exponentiation mod N.
+  function modN(x) {
+    while (x >= 255) {
+      x -= 255;
+      x  = (x >> 8) + (x & 255);
+    }
+
+    return x;
+  }
+
+  // Calculate and append `ecc` data to the `data` block. If block is in the string buffer the
+  // indices to buffers are used.
+  function appendData(data, dataLength, ecc, eccLength) {
+    var bit, i, j;
+
+    for (i = 0; i < eccLength; i++) {
+      stringBuffer[ecc + i] = 0;
+    }
+
+    for (i = 0; i < dataLength; i++) {
+      bit = GALOIS_LOG[stringBuffer[data + i] ^ stringBuffer[ecc]];
+
+      if (bit !== 255) {
+        for (j = 1; j < eccLength; j++) {
+          stringBuffer[ecc + j - 1] = stringBuffer[ecc + j] ^
+              GALOIS_EXPONENT[modN(bit + polynomial[eccLength - j])];
+        }
+      } else {
+        for (j = ecc; j < ecc + eccLength; j++) {
+          stringBuffer[j] = stringBuffer[j + 1];
+        }
+      }
+
+      stringBuffer[ecc + eccLength - 1] = bit === 255 ? 0 :
+          GALOIS_EXPONENT[modN(bit + polynomial[0])];
+    }
+  }
+
+  // Check mask since symmetricals use half.
+  function isMasked(x, y) {
+    var bit;
+
+    if (x > y) {
+      bit = x;
+      x   = y;
+      y   = bit;
+    }
+
+    bit   = y;
+    bit  += y * y;
+    bit >>= 1;
+    bit  += x;
+
+    return frameMask[bit] === 1;
+  }
+
+  // Apply the selected mask out of the 8 options.
+  function applyMask(mask) {
+    var x, y, r3x, r3y;
+
+    switch (mask) {
+      case 0:
+        for (y = 0; y < width; y++) {
+          for (x = 0; x < width; x++) {
+            if (!((x + y) & 1) && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 1:
+        for (y = 0; y < width; y++) {
+          for (x = 0; x < width; x++) {
+            if (!(y & 1) && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 2:
+        for (y = 0; y < width; y++) {
+          for (r3x = 0, x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) r3x = 0;
+
+            if (!r3x && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 3:
+        for (r3y = 0, y = 0; y < width; y++, r3y++) {
+          if (r3y === 3) r3y = 0;
+
+          for (r3x = r3y, x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) r3x = 0;
+
+            if (!r3x && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 4:
+        for (y = 0; y < width; y++) {
+          for (r3x = 0, r3y = ((y >> 1) & 1), x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) {
+              r3x = 0;
+              r3y = !r3y;
+            }
+
+            if (!r3y && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 5:
+        for (r3y = 0, y = 0; y < width; y++, r3y++) {
+          if (r3y === 3) r3y = 0;
+
+          for (r3x = 0, x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) r3x = 0;
+
+            if (!((x & y & 1) + !(!r3x | !r3y)) && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 6:
+        for (r3y = 0, y = 0; y < width; y++, r3y++) {
+          if (r3y === 3) r3y = 0;
+
+          for (r3x = 0, x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) r3x = 0;
+
+            if (!(((x & y & 1) + (r3x && (r3x === r3y))) & 1) && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+      case 7:
+        for (r3y = 0, y = 0; y < width; y++, r3y++) {
+          if (r3y === 3) r3y = 0;
+
+          for (r3x = 0, x = 0; x < width; x++, r3x++) {
+            if (r3x === 3) r3x = 0;
+
+            if (!(((r3x && (r3x === r3y)) + ((x + y) & 1)) & 1) && !isMasked(x, y)) {
+              frameBuffer[x + y * width] ^= 1;
+            }
+          }
+        }
+
+        break;
+    }
+  }
+
+  // Using the table for the length of each run, calculate the amount of bad image. Long runs or
+  // those that look like finders are called twice; once for X and Y.
+  function getBadRuns(length) {
+    var badRuns = 0;
+    var i;
+
+    for (i = 0; i <= length; i++) {
+      if (badBuffer[i] >= 5) {
+        badRuns += N1 + badBuffer[i] - 5;
+      }
+    }
+
+    // FBFFFBF as in finder.
+    for (i = 3; i < length - 1; i += 2) {
+      if (badBuffer[i - 2] === badBuffer[i + 2] &&
+          badBuffer[i + 2] === badBuffer[i - 1] &&
+          badBuffer[i - 1] === badBuffer[i + 1] &&
+          badBuffer[i - 1] * 3 === badBuffer[i] &&
+          // Background around the foreground pattern? Not part of the specs.
+          (badBuffer[i - 3] === 0 || i + 3 > length ||
+           badBuffer[i - 3] * 3 >= badBuffer[i] * 4 ||
+           badBuffer[i + 3] * 3 >= badBuffer[i] * 4)) {
+        badRuns += N3;
+      }
+    }
+
+    return badRuns;
+  }
+
+  // Calculate how bad the masked image is (e.g. blocks, imbalance, runs, or finders).
+  function checkBadness() {
+    var b, b1, bad, big, bw, count, h, x, y;
+    bad = bw = count = 0;
+
+    // Blocks of same colour.
+    for (y = 0; y < width - 1; y++) {
+      for (x = 0; x < width - 1; x++) {
+            // All foreground colour.
+        if ((frameBuffer[x + width * y] &&
+             frameBuffer[(x + 1) + width * y] &&
+             frameBuffer[x + width * (y + 1)] &&
+             frameBuffer[(x + 1) + width * (y + 1)]) ||
+            // All background colour.
+            !(frameBuffer[x + width * y] ||
+              frameBuffer[(x + 1) + width * y] ||
+              frameBuffer[x + width * (y + 1)] ||
+              frameBuffer[(x + 1) + width * (y + 1)])) {
+          bad += N2;
+        }
+      }
+    }
+
+    // X runs.
+    for (y = 0; y < width; y++) {
+      badBuffer[0] = 0;
+
+      for (h = b = x = 0; x < width; x++) {
+        if ((b1 = frameBuffer[x + width * y]) === b) {
+          badBuffer[h]++;
+        } else {
+          badBuffer[++h] = 1;
+        }
+
+        b   = b1;
+        bw += b ? 1 : -1;
+      }
+
+      bad += getBadRuns(h);
+    }
+
+    if (bw < 0) bw = -bw;
+
+    big   = bw;
+    big  += big << 2;
+    big <<= 1;
+
+    while (big > width * width) {
+      big -= width * width;
+      count++;
+    }
+
+    bad += count * N4;
+
+    // Y runs.
+    for (x = 0; x < width; x++) {
+      badBuffer[0] = 0;
+
+      for (h = b = y = 0; y < width; y++) {
+        if ((b1 = frameBuffer[x + width * y]) === b) {
+          badBuffer[h]++;
+        } else {
+          badBuffer[++h] = 1;
+        }
+
+        b = b1;
+      }
+
+      bad += getBadRuns(h);
+    }
+
+    return bad;
+  }
+
+  // Generate the encoded QR image for the string provided.
+  function generateFrame(str) {
+    var i, j, k, m, t, v, x, y;
+
+    // Find the smallest version that fits the string.
+    t = str.length;
+
+    version = 0;
+
+    do {
+      version++;
+
+      k = (eccLevel - 1) * 4 + (version - 1) * 16;
+
+      neccBlock1 = ECC_BLOCKS[k++];
+      neccBlock2 = ECC_BLOCKS[k++];
+      dataBlock  = ECC_BLOCKS[k++];
+      eccBlock   = ECC_BLOCKS[k];
+
+      k = dataBlock * (neccBlock1 + neccBlock2) + neccBlock2 - 3 + (version <= 9);
+
+      if (t <= k) break;
+    } while (version < 40);
+
+    // FIXME: Ensure that it fits insted of being truncated.
+    width = 17 + 4 * version;
+
+    // Allocate, clear and setup data structures.
+    v = dataBlock + (dataBlock + eccBlock) * (neccBlock1 + neccBlock2) + neccBlock2;
+
+    for (t = 0; t < v; t++) {
+      eccBuffer[t] = 0;
+    }
+
+    stringBuffer = str.slice(0);
+
+    for (t = 0; t < width * width; t++) {
+      frameBuffer[t] = 0;
+    }
+
+    for (t = 0; t < (width * (width + 1) + 1) / 2; t++) {
+      frameMask[t] = 0;
+    }
+
+    // Insert finders: Foreground colour to frame and background to mask.
+    for (t = 0; t < 3; t++) {
+      k = y = 0;
+
+      if (t === 1) k = (width - 7);
+      if (t === 2) y = (width - 7);
+
+      frameBuffer[(y + 3) + width * (k + 3)] = 1;
+
+      for (x = 0; x < 6; x++) {
+        frameBuffer[(y + x) + width * k] = 1;
+        frameBuffer[y + width * (k + x + 1)] = 1;
+        frameBuffer[(y + 6) + width * (k + x)] = 1;
+        frameBuffer[(y + x + 1) + width * (k + 6)] = 1;
+      }
+
+      for (x = 1; x < 5; x++) {
+        setMask(y + x, k + 1);
+        setMask(y + 1, k + x + 1);
+        setMask(y + 5, k + x);
+        setMask(y + x + 1, k + 5);
+      }
+
+      for (x = 2; x < 4; x++) {
+        frameBuffer[(y + x) + width * (k + 2)] = 1;
+        frameBuffer[(y + 2) + width * (k + x + 1)] = 1;
+        frameBuffer[(y + 4) + width * (k + x)] = 1;
+        frameBuffer[(y + x + 1) + width * (k + 4)] = 1;
+      }
+    }
+
+    // Alignment blocks.
+    if (version > 1) {
+      t = ALIGNMENT_DELTA[version];
+      y = width - 7;
+
+      for (;;) {
+        x = width - 7;
+
+        while (x > t - 3) {
+          addAlignment(x, y);
+
+          if (x < t) break;
+
+          x -= t;
+        }
+
+        if (y <= t + 9) break;
+
+        y -= t;
+
+        addAlignment(6, y);
+        addAlignment(y, 6);
+      }
+    }
+
+    // Single foreground cell.
+    frameBuffer[8 + width * (width - 8)] = 1;
+
+    // Timing gap (mask only).
+    for (y = 0; y < 7; y++) {
+      setMask(7, y);
+      setMask(width - 8, y);
+      setMask(7, y + width - 7);
+    }
+
+    for (x = 0; x < 8; x++) {
+      setMask(x, 7);
+      setMask(x + width - 8, 7);
+      setMask(x, width - 8);
+    }
+
+    // Reserve mask, format area.
+    for (x = 0; x < 9; x++) {
+      setMask(x, 8);
+    }
+
+    for (x = 0; x < 8; x++) {
+      setMask(x + width - 8, 8);
+      setMask(8, x);
+    }
+
+    for (y = 0; y < 7; y++) {
+      setMask(8, y + width - 7);
+    }
+
+    // Timing row/column.
+    for (x = 0; x < width - 14; x++) {
+      if (x & 1) {
+        setMask(8 + x, 6);
+        setMask(6, 8 + x);
+      } else {
+        frameBuffer[(8 + x) + width * 6] = 1;
+        frameBuffer[6 + width * (8 + x)] = 1;
+      }
+    }
+
+    // Version block.
+    if (version > 6) {
+      t = VERSION_BLOCK[version - 7];
+      k = 17;
+
+      for (x = 0; x < 6; x++) {
+        for (y = 0; y < 3; y++, k--) {
+          if (1 & (k > 11 ? version >> (k - 12) : t >> k)) {
+            frameBuffer[(5 - x) + width * (2 - y + width - 11)] = 1;
+            frameBuffer[(2 - y + width - 11) + width * (5 - x)] = 1;
+          } else {
+            setMask(5 - x, 2 - y + width - 11);
+            setMask(2 - y + width - 11, 5 - x);
+          }
+        }
+      }
+    }
+
+    // Sync mask bits. Only set above for background cells, so now add the foreground.
+    for (y = 0; y < width; y++) {
+      for (x = 0; x <= y; x++) {
+        if (frameBuffer[x + width * y]) {
+          setMask(x, y);
+        }
+      }
+    }
+
+    // Convert string to bit stream. 8-bit data to QR-coded 8-bit data (numeric, alphanum, or kanji
+    // not supported).
+    v = stringBuffer.length;
+
+    // String to array.
+    for (i = 0; i < v; i++) {
+      eccBuffer[i] = stringBuffer.charCodeAt(i);
+    }
+
+    stringBuffer = eccBuffer.slice(0);
+
+    // Calculate max string length.
+    x = dataBlock * (neccBlock1 + neccBlock2) + neccBlock2;
+
+    if (v >= x - 2) {
+      v = x - 2;
+
+      if (version > 9) v--;
+    }
+
+    // Shift and re-pack to insert length prefix.
+    i = v;
+
+    if (version > 9) {
+      stringBuffer[i + 2] = 0;
+      stringBuffer[i + 3] = 0;
+
+      while (i--) {
+        t = stringBuffer[i];
+
+        stringBuffer[i + 3] |= 255 & (t << 4);
+        stringBuffer[i + 2] = t >> 4;
+      }
+
+      stringBuffer[2] |= 255 & (v << 4);
+      stringBuffer[1] = v >> 4;
+      stringBuffer[0] = 0x40 | (v >> 12);
+    } else {
+      stringBuffer[i + 1] = 0;
+      stringBuffer[i + 2] = 0;
+
+      while (i--) {
+        t = stringBuffer[i];
+
+        stringBuffer[i + 2] |= 255 & (t << 4);
+        stringBuffer[i + 1] = t >> 4;
+      }
+
+      stringBuffer[1] |= 255 & (v << 4);
+      stringBuffer[0] = 0x40 | (v >> 4);
+    }
+
+    // Fill to end with pad pattern.
+    i = v + 3 - (version < 10);
+
+    while (i < x) {
+      stringBuffer[i++] = 0xec;
+      stringBuffer[i++] = 0x11;
+    }
+
+    // Calculate generator polynomial.
+    polynomial[0] = 1;
+
+    for (i = 0; i < eccBlock; i++) {
+      polynomial[i + 1] = 1;
+
+      for (j = i; j > 0; j--) {
+        polynomial[j] = polynomial[j] ? polynomial[j - 1] ^
+            GALOIS_EXPONENT[modN(GALOIS_LOG[polynomial[j]] + i)] : polynomial[j - 1];
+      }
+
+      polynomial[0] = GALOIS_EXPONENT[modN(GALOIS_LOG[polynomial[0]] + i)];
+    }
+
+    // Use logs for generator polynomial to save calculation step.
+    for (i = 0; i <= eccBlock; i++) {
+      polynomial[i] = GALOIS_LOG[polynomial[i]];
+    }
+
+    // Append ECC to data buffer.
+    k = x;
+    y = 0;
+
+    for (i = 0; i < neccBlock1; i++) {
+      appendData(y, dataBlock, k, eccBlock);
+
+      y += dataBlock;
+      k += eccBlock;
+    }
+
+    for (i = 0; i < neccBlock2; i++) {
+      appendData(y, dataBlock + 1, k, eccBlock);
+
+      y += dataBlock + 1;
+      k += eccBlock;
+    }
+
+    // Interleave blocks.
+    y = 0;
+
+    for (i = 0; i < dataBlock; i++) {
+      for (j = 0; j < neccBlock1; j++) {
+        eccBuffer[y++] = stringBuffer[i + j * dataBlock];
+      }
+
+      for (j = 0; j < neccBlock2; j++) {
+        eccBuffer[y++] = stringBuffer[(neccBlock1 * dataBlock) + i + (j * (dataBlock + 1))];
+      }
+    }
+
+    for (j = 0; j < neccBlock2; j++) {
+      eccBuffer[y++] = stringBuffer[(neccBlock1 * dataBlock) + i + (j * (dataBlock + 1))];
+    }
+
+    for (i = 0; i < eccBlock; i++) {
+      for (j = 0; j < neccBlock1 + neccBlock2; j++) {
+        eccBuffer[y++] = stringBuffer[x + i + j * eccBlock];
+      }
+    }
+
+    stringBuffer = eccBuffer;
+
+    // Pack bits into frame avoiding masked area.
+    x = y = width - 1;
+    k = v = 1;
+
+    // inteleaved data and ECC codes.
+    m = (dataBlock + eccBlock) * (neccBlock1 + neccBlock2) + neccBlock2;
+
+    for (i = 0; i < m; i++) {
+      t = stringBuffer[i];
+
+      for (j = 0; j < 8; j++, t <<= 1) {
+        if (0x80 & t) {
+          frameBuffer[x + width * y] = 1;
+        }
+
+        // Find next fill position.
+        do {
+          if (v) {
+            x--;
+          } else {
+            x++;
+
+            if (k) {
+              if (y !== 0) {
+                y--;
+              } else {
+                x -= 2;
+                k  = !k;
+
+                if (x === 6) {
+                  x--;
+                  y = 9;
+                }
+              }
+            } else {
+              if (y !== width - 1) {
+                y++;
+              } else {
+                x -= 2;
+                k  = !k;
+
+                if (x === 6) {
+                  x--;
+                  y -= 8;
+                }
+              }
+            }
+          }
+
+          v = !v;
+        } while (isMasked(x, y));
+      }
+    }
+
+    // Save pre-mask copy of frame.
+    stringBuffer = frameBuffer.slice(0);
+
+    t = 0;
+    y = 30000;
+
+    // Using `for` instead of `while` since in original Arduino code if an early mask was *good
+    // enough* it wouldn't try for a better one since they get more complex and take longer.
+    for (k = 0; k < 8; k++) {
+      // Returns foreground-background imbalance.
+      applyMask(k);
+
+      x = checkBadness();
+
+      // Is current mask better than previous best?
+      if (x < y) {
+        y = x;
+        t = k;
+      }
+
+      // Don't increment `i` to a void redoing mask.
+      if (t === 7) break;
+
+      // Reset for next pass.
+      frameBuffer = stringBuffer.slice(0);
+    }
+
+    // Redo best mask as none were *good enough* (i.e. last wasn't `t`).
+    if (t !== k) {
+      applyMask(t);
+    }
+
+    // Add in final mask/ECC level bytes.
+    y = FINAL_FORMAT[t + ((eccLevel - 1) << 3)];
+
+    // Low byte.
+    for (k = 0; k < 8; k++, y >>= 1) {
+      if (y & 1) {
+        frameBuffer[(width - 1 - k) + width * 8] = 1;
+
+        if (k < 6) {
+          frameBuffer[8 + width * k] = 1;
+        } else {
+          frameBuffer[8 + width * (k + 1)] = 1;
+        }
+      }
+    }
+
+    // High byte.
+    for (k = 0; k < 7; k++, y >>= 1) {
+      if (y & 1) {
+        frameBuffer[8 + width * (width - 7 + k)] = 1;
+
+        if (k) {
+          frameBuffer[(6 - k) + width * 8] = 1;
+        } else {
+          frameBuffer[7 + width * 8] = 1;
+        }
+      }
+    }
+
+    // Finally, return the image data.
+    return frameBuffer;
+  }
+
+  // qr.js setup
+  // -----------
+
+  // Build the publicly exposed API.
+  var qr = {
+
+    // Constants
+    // ---------
+
+    // Current version of `qr`.
+    VERSION: '1.1.3',
+
+    // QR functions
+    // ------------
+
+    // Generate the QR code using the data provided and render it on to a `<canvas>` element.  
+    // If no `<canvas>` element is specified in the argument provided a new one will be created and
+    // used.  
+    // ECC (error correction capacity) determines how many intential errors are contained in the QR
+    // code.
+    canvas: function(data) {
+      data = normalizeData(data);
+
+      // Module size of the generated QR code (i.e. 1-10).
+      var size = data.size >= 1 && data.size <= 10 ? data.size : 4;
+      // Actual size of the QR code symbol and is scaled to 25 pixels (e.g. 1 = 25px, 3 = 75px).
+      size *= 25;
+
+      // `<canvas>` element used to render the QR code.
+      var cvs = data.canvas || createCanvas();
+      // Retreive the 2D context of the canvas.
+      var c2d = cvs.getContext('2d');
+      // Ensure the canvas has the correct dimensions.
+      c2d.canvas.width  = size;
+      c2d.canvas.height = size;
+      // Fill the canvas with the correct background colour.
+      c2d.fillStyle = data.background || '#fff';
+      c2d.fillRect(0, 0, size, size);
+
+      // Determine the ECC level to be applied.
+      eccLevel = ECC_LEVELS[(data.level && data.level.toUpperCase()) || 'L'];
+
+      // Generate the image frame for the given `value`.
+      var frame = generateFrame(data.value || '');
+
+      c2d.lineWidth = 1;
+
+      // Determine the *pixel* size.
+      var px = size;
+      px /= width;
+      px  = Math.floor(px);
+
+      // Draw the QR code.
+      c2d.clearRect(0, 0, size, size);
+      c2d.fillStyle = data.background || '#fff';
+      c2d.fillRect(0, 0, px * (width + 8), px * (width + 8));
+      c2d.fillStyle = data.foreground || '#000';
+
+      var i, j;
+
+      for (i = 0; i < width; i++) {
+        for (j = 0; j < width; j++) {
+          if (frame[j * width + i]) {
+            c2d.fillRect(px * i, px * j, px, px);
+          }
+        }
+      }
+
+      return cvs;
+    },
+
+    // Generate the QR code using the data provided and render it on to a `<img>` element.  
+    // If no `<img>` element is specified in the argument provided a new one will be created and
+    // used.  
+    // ECC (error correction capacity) determines how many intential errors are contained in the QR
+    // code.
+    image: function(data) {
+      data = normalizeData(data);
+
+      // `<canvas>` element only which the QR code is rendered.
+      var cvs = this.canvas(data);
+      // `<img>` element used to display the QR code.
+      var img = data.image || createImage();
+
+      // Apply the QR code to `img`.
+      img.src    = cvs.toDataURL(data.mime || DEFAULT_MIME);
+      img.height = cvs.height;
+      img.width  = cvs.width;
+
+      return img;
+    },
+
+    // Generate the QR code using the data provided and render it on to a `<canvas>` element and
+    // save it as an image file.  
+    // If no `<canvas>` element is specified in the argument provided a new one will be created and
+    // used.  
+    // ECC (error correction capacity) determines how many intential errors are contained in the QR
+    // code.  
+    // If called in a browser the `path` property/argument is ignored and will simply prompt the
+    // user to choose a location and file name. However, if called within node.js the file will be
+    // saved to specified path.  
+    // A `callback` function must be provided which will be called once the saving process has
+    // started. If an error occurs it will be passed as the first argument to this function,
+    // otherwise this argument will be `null`.
+    save: function(data, path, callback) {
+      data = normalizeData(data);
+
+      switch (typeof path) {
+        case 'function':
+          callback = path;
+          path = null;
+          break;
+        case 'string':
+          data.path = path;
+          break;
+      }
+
+      // Callback function is required.
+      if (typeof callback !== 'function') {
+        throw new TypeError('Invalid callback type: ' + typeof callback);
+      }
+
+      var completed = false;
+      // `<canvas>` element only which the QR code is rendered.
+      var cvs = this.canvas(data);
+
+      // Simple function to try and ensure that the `callback` function is only called once.
+      function done(error) {
+        if (!completed) {
+          completed = true;
+
+          callback(error);
+        }
+      }
+
+      if (inNode) {
+        writeFile(cvs, data, done);
+      } else {
+        download(cvs, data, done);
+      }
+    },
+
+    // Generate the QR code using the data provided and render it on to a `<canvas>` element and
+    // save it as an image file.  
+    // If no `<canvas>` element is specified in the argument provided a new one will be created and
+    // used.  
+    // ECC (error correction capacity) determines how many intential errors are contained in the QR
+    // code.  
+    // If called in a browser the `path` property/argument is ignored and will simply prompt the
+    // user to choose a location and file name. However, if called within node.js the file will be
+    // saved to specified path.
+    saveSync: function(data, path) {
+      data = normalizeData(data);
+
+      if (typeof path === 'string') data.path = path;
+
+      // `<canvas>` element only which the QR code is rendered.
+      var cvs = this.canvas(data);
+
+      if (inNode) {
+        writeFileSync(cvs, data);
+      } else {
+        download(cvs, data);
+      }
+    },
+
+    // Generate the QR code using the data provided and render it on to a `<canvas>` element before
+    // returning its data URI.  
+    // If no `<canvas>` element is specified in the argument provided a new one will be created and
+    // used.  
+    // ECC (error correction capacity) determines how many intential errors are contained in the QR
+    // code.
+    toDataURL: function(data) {
+      data = normalizeData(data);
+
+      return this.canvas(data).toDataURL(data.mime || DEFAULT_MIME);
+    },
+
+    // Utility functions
+    // -----------------
+
+    // Run qr.js in *noConflict* mode, returning the `qr` variable to its previous owner.  
+    // Returns a reference to `qr`.
+    noConflict: function() {
+      root.qr = previousQr;
+      return this;
+    }
+
+  };
+
+  // Support
+  // -------
+
+  // Export `qr` for node.js and CommonJS.
+  if (typeof exports !== 'undefined') {
+    inNode = true;
+
+    if (typeof module !== 'undefined' && module.exports) {
+      exports = module.exports = qr;
+    }
+    exports.qr = qr;
+
+    // Import required node.js modules.
+    Canvas = require('canvas');
+    Image = Canvas.Image;
+    fs = require('fs');
+  } else if (typeof define === 'function' && define.amd) {
+    define(function () {
+      return qr;
+    });
+  } else {
+    // In non-HTML5 browser so strip base functionality.
+    if (!root.HTMLCanvasElement) {
+      overrideAPI(qr);
+    }
+
+    root.qr = qr;
+  }
+
+})(this);
diff --git a/plugins/qrcode/qr-1.1.3.min.js b/plugins/qrcode/qr-1.1.3.min.js
new file mode 100644
index 00000000..19d704e1
--- /dev/null
+++ b/plugins/qrcode/qr-1.1.3.min.js
@@ -0,0 +1,5 @@
+/*! qr-js v1.1.3 | (c) 2014 Alasdair Mercer | GPL v3 License
+jsqrencode | (c) 2010 tz@execpc.com | GPL v3 License
+*/
+!function(a){"use strict";function b(){return T?new r:a.document.createElement("canvas")}function c(){return T?new x:a.document.createElement("img")}function d(b,c,d){var e=c.mime||B;a.location.href=b.toDataURL(e).replace(e,C),"function"==typeof d&&d()}function e(a){return"string"==typeof a&&(a={value:a}),a||{}}function f(a){function b(b){a[b]=function(){throw new Error(b+" requires HTML5 canvas element support")}}var c,d=["canvas","image","save","saveSync","toDataURL"];for(c=0;c<d.length;c++)b(d[c])}function g(a,b,c){function d(){w.write(e,f,0,f.length,0,function(a){w.close(e),c(a)})}if("string"!=typeof b.path)return c(new TypeError("Invalid path type: "+typeof b.path));var e,f;a.toBuffer(function(a,b){return a?c(a):(f=b,void(e&&d()))}),w.open(b.path,"w",N,function(a,b){return a?c(a):(e=b,void(f&&d()))})}function h(a,b){if("string"!=typeof b.path)throw new TypeError("Invalid path type: "+typeof b.path);var c=a.toBuffer(),d=w.openSync(b.path,"w",N);try{w.writeSync(d,c,0,c.length,0)}finally{w.closeSync(d)}}function i(a,b){var c;a>b&&(c=a,a=b,b=c),c=b,c*=b,c+=b,c>>=1,c+=a,S[c]=1}function j(a,b){var c;for(R[a+z*b]=1,c=-2;2>c;c++)R[a+c+z*(b-2)]=1,R[a-2+z*(b+c+1)]=1,R[a+2+z*(b+c)]=1,R[a+c+1+z*(b+2)]=1;for(c=0;2>c;c++)i(a-1,b+c),i(a+1,b-c),i(a-c,b-1),i(a+c,b+1)}function k(a){for(;a>=255;)a-=255,a=(a>>8)+(255&a);return a}function l(a,b,c,d){var e,f,g;for(f=0;d>f;f++)W[c+f]=0;for(f=0;b>f;f++){if(e=H[W[a+f]^W[c]],255!==e)for(g=1;d>g;g++)W[c+g-1]=W[c+g]^G[k(e+U[d-g])];else for(g=c;c+d>g;g++)W[g]=W[g+1];W[c+d-1]=255===e?0:G[k(e+U[0])]}}function m(a,b){var c;return a>b&&(c=a,a=b,b=c),c=b,c+=b*b,c>>=1,c+=a,1===S[c]}function n(a){var b,c,d,e;switch(a){case 0:for(c=0;z>c;c++)for(b=0;z>b;b++)b+c&1||m(b,c)||(R[b+c*z]^=1);break;case 1:for(c=0;z>c;c++)for(b=0;z>b;b++)1&c||m(b,c)||(R[b+c*z]^=1);break;case 2:for(c=0;z>c;c++)for(d=0,b=0;z>b;b++,d++)3===d&&(d=0),d||m(b,c)||(R[b+c*z]^=1);break;case 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r,s,t,u,v,w,x,y,z,A=[0,11,15,19,23,27,31,16,18,20,22,24,26,28,20,22,24,24,26,28,28,22,24,24,26,26,28,28,24,24,26,26,26,28,28,24,26,26,26,28,28],B="image/png",C="image/octet-stream",D=[1,0,19,7,1,0,16,10,1,0,13,13,1,0,9,17,1,0,34,10,1,0,28,16,1,0,22,22,1,0,16,28,1,0,55,15,1,0,44,26,2,0,17,18,2,0,13,22,1,0,80,20,2,0,32,18,2,0,24,26,4,0,9,16,1,0,108,26,2,0,43,24,2,2,15,18,2,2,11,22,2,0,68,18,4,0,27,16,4,0,19,24,4,0,15,28,2,0,78,20,4,0,31,18,2,4,14,18,4,1,13,26,2,0,97,24,2,2,38,22,4,2,18,22,4,2,14,26,2,0,116,30,3,2,36,22,4,4,16,20,4,4,12,24,2,2,68,18,4,1,43,26,6,2,19,24,6,2,15,28,4,0,81,20,1,4,50,30,4,4,22,28,3,8,12,24,2,2,92,24,6,2,36,22,4,6,20,26,7,4,14,28,4,0,107,26,8,1,37,22,8,4,20,24,12,4,11,22,3,1,115,30,4,5,40,24,11,5,16,20,11,5,12,24,5,1,87,22,5,5,41,24,5,7,24,30,11,7,12,24,5,1,98,24,7,3,45,28,15,2,19,24,3,13,15,30,1,5,107,28,10,1,46,28,1,15,22,28,2,17,14,28,5,1,120,30,9,4,43,26,17,1,22,28,2,19,14,28,3,4,113,28,3,11,44,26,17,4,21,26,9,16,13,26,3,5,107,28,3,13,41,26,15,5,24,30,15,10,15,28,4,4,116,28,17,0,42,26,17,6,22,28,19,6,16,30,2,7,111,28,17,0,46,28,7,16,24,30,34,0,13,24,4,5,121,30,4,14,47,28,11,14,24,30,16,14,15,30,6,4,117,30,6,14,45,28,11,16,24,30,30,2,16,30,8,4,106,26,8,13,47,28,7,22,24,30,22,13,15,30,10,2,114,28,19,4,46,28,28,6,22,28,33,4,16,30,8,4,122,30,22,3,45,28,8,26,23,30,12,28,15,30,3,10,117,30,3,23,45,28,4,31,24,30,11,31,15,30,7,7,116,30,21,7,45,28,1,37,23,30,19,26,15,30,5,10,115,30,19,10,47,28,15,25,24,30,23,25,15,30,13,3,115,30,2,29,46,28,42,1,24,30,23,28,15,30,17,0,115,30,10,23,46,28,10,35,24,30,19,35,15,30,17,1,115,30,14,21,46,28,29,19,24,30,11,46,15,30,13,6,115,30,14,23,46,28,44,7,24,30,59,1,16,30,12,7,121,30,12,26,47,28,39,14,24,30,22,41,15,30,6,14,121,30,6,34,47,28,46,10,24,30,2,64,15,30,17,4,122,30,29,14,46,28,49,10,24,30,24,46,15,30,4,18,122,30,13,32,46,28,48,14,24,30,42,32,15,30,20,4,117,30,40,7,47,28,43,22,24,30,10,67,15,30,19,6,118,30,18,31,47,28,34,34,24,30,20,61,15,30],E={L:1,M:2,Q:3,H:4},F=[30660,29427,32170,30877,26159,25368,27713,26998,21522,20773,24188,23371,17913,16590,20375,19104,13663,12392,16177,14854,9396,8579,11994,11245,5769,5054,7399,6608,1890,597,3340,2107],G=[1,2,4,8,16,32,64,128,29,58,116,232,205,135,19,38,76,152,45,90,180,117,234,201,143,3,6,12,24,48,96,192,157,39,78,156,37,74,148,53,106,212,181,119,238,193,159,35,70,140,5,10,20,40,80,160,93,186,105,210,185,111,222,161,95,190,97,194,153,47,94,188,101,202,137,15,30,60,120,240,253,231,211,187,107,214,177,127,254,225,223,163,91,182,113,226,217,175,67,134,17,34,68,136,13,26,52,104,208,189,103,206,129,31,62,124,248,237,199,147,59,118,236,197,151,51,102,204,133,23,46,92,184,109,218,169,79,158,33,66,132,21,42,84,168,77,154,41,82,164,85,170,73,146,57,114,228,213,183,115,230,209,191,99,198,145,63,126,252,229,215,179,123,246,241,255,227,219,171,75,150,49,98,196,149,55,110,220,165,87,174,65,130,25,50,100,200,141,7,14,28,56,112,224,221,167,83,166,81,162,89,178,121,242,249,239,195,155,43,86,172,69,138,9,18,36,72,144,61,122,244,245,247,243,251,235,203,139,11,22,44,88,176,125,250,233,207,131,27,54,108,216,173,71,142,0],H=[255,0,1,25,2,50,26,198,3,223,51,238,27,104,199,75,4,100,224,14,52,141,239,129,28,193,105,248,200,8,76,113,5,138,101,47,225,36,15,33,53,147,142,218,240,18,130,69,29,181,194,125,106,39,249,185,201,154,9,120,77,228,114,166,6,191,139,98,102,221,48,253,226,152,37,179,16,145,34,136,54,208,148,206,143,150,219,189,241,210,19,92,131,56,70,64,30,66,182,163,195,72,126,110,107,58,40,84,250,133,186,61,202,94,155,159,10,21,121,43,78,212,229,172,115,243,167,87,7,112,192,247,140,128,99,13,103,74,222,237,49,197,254,24,227,165,153,119,38,184,180,124,17,68,146,217,35,32,137,46,55,63,209,91,149,188,207,205,144,135,151,178,220,252,190,97,242,86,211,171,20,42,93,158,132,60,57,83,71,109,65,162,31,45,67,216,183,123,164,118,196,23,73,236,127,12,111,246,108,161,59,82,41,157,85,170,251,96,134,177,187,204,62,90,203,89,95,176,156,169,160,81,11,245,22,235,122,117,44,215,79,174,213,233,230,231,173,232,116,214,244,234,168,80,88,175],I=3,J=3,K=40,L=10,M=[3220,1468,2713,1235,3062,1890,2119,1549,2344,2936,1117,2583,1330,2470,1667,2249,2028,3780,481,4011,142,3098,831,3445,592,2517,1776,2234,1951,2827,1070,2660,1345,3177],N=parseInt("0666",8),O=[],P=[],Q=1,R=[],S=[],T=!1,U=[],V=a.qr,W=[],X={VERSION:"1.1.3",canvas:function(a){a=e(a);var c=a.size>=1&&a.size<=10?a.size:4;c*=25;var d=a.canvas||b(),f=d.getContext("2d");f.canvas.width=c,f.canvas.height=c,f.fillStyle=a.background||"#fff",f.fillRect(0,0,c,c),Q=E[a.level&&a.level.toUpperCase()||"L"];var g=q(a.value||"");f.lineWidth=1;var h=c;h/=z,h=Math.floor(h),f.clearRect(0,0,c,c),f.fillStyle=a.background||"#fff",f.fillRect(0,0,h*(z+8),h*(z+8)),f.fillStyle=a.foreground||"#000";var i,j;for(i=0;z>i;i++)for(j=0;z>j;j++)g[j*z+i]&&f.fillRect(h*i,h*j,h,h);return d},image:function(a){a=e(a);var b=this.canvas(a),d=a.image||c();return d.src=b.toDataURL(a.mime||B),d.height=b.height,d.width=b.width,d},save:function(a,b,c){function f(a){h||(h=!0,c(a))}switch(a=e(a),typeof b){case"function":c=b,b=null;break;case"string":a.path=b}if("function"!=typeof c)throw new TypeError("Invalid callback type: "+typeof c);var h=!1,i=this.canvas(a);T?g(i,a,f):d(i,a,f)},saveSync:function(a,b){a=e(a),"string"==typeof b&&(a.path=b);var c=this.canvas(a);T?h(c,a):d(c,a)},toDataURL:function(a){return a=e(a),this.canvas(a).toDataURL(a.mime||B)},noConflict:function(){return a.qr=V,this}};"undefined"!=typeof exports?(T=!0,"undefined"!=typeof module&&module.exports&&(exports=module.exports=X),exports.qr=X,r=require("canvas"),x=r.Image,w=require("fs")):"function"==typeof define&&define.amd?define(function(){return X}):(a.HTMLCanvasElement||f(X),a.qr=X)}(this);
+//# sourceMappingURL=qr.min.map
\ No newline at end of file
diff --git a/plugins/qrcode/qrcode.html b/plugins/qrcode/qrcode.html
new file mode 100644
index 00000000..ffdaf3b8
--- /dev/null
+++ b/plugins/qrcode/qrcode.html
@@ -0,0 +1,5 @@
+<div class="linkqrcode">
+    <a href="http://qrfree.kaywa.com/?l=1&amp;s=8&amp;d=%s" onclick="showQrCode(this); return false;" class="qrcode" data-permalink="%s">
+        <img src="%s/qrcode/qrcode.png" width="13" height="13" title="QR-Code">
+    </a>
+</div>
diff --git a/plugins/qrcode/qrcode.php b/plugins/qrcode/qrcode.php
new file mode 100644
index 00000000..1080c964
--- /dev/null
+++ b/plugins/qrcode/qrcode.php
@@ -0,0 +1,41 @@
+<?php
+/**
+ * Plugin qrcode
+ * Add QRCode containing URL for each links.
+ * Display a QRCode icon in link list.
+ */
+
+/**
+ * Add qrcode icon to link_plugin when rendering linklist.
+ *
+ * @param array $data - linklist data.
+ *
+ * @return mixed - linklist data with qrcode plugin.
+ */
+function hook_qrcode_render_linklist($data)
+{
+    $qrcode_html = file_get_contents(PluginManager::$PLUGINS_PATH . '/qrcode/qrcode.html');
+
+    foreach ($data['links'] as &$value) {
+        $qrcode = sprintf($qrcode_html, $value['url'], $value['url'], PluginManager::$PLUGINS_PATH);
+        $value['link_plugin'][] = $qrcode;
+    }
+
+    return $data;
+}
+
+/**
+ * When linklist is displayed, include qrcode JS files.
+ *
+ * @param array $data - footer data.
+ *
+ * @return mixed - footer data with qrcode JS files added.
+ */
+function hook_qrcode_render_footer($data)
+{
+    if ($data['_PAGE_'] == Router::$PAGE_LINKLIST) {
+        $data['js_files'][] = PluginManager::$PLUGINS_PATH . '/qrcode/shaarli-qrcode.js';
+    }
+
+    return $data;
+}
diff --git a/plugins/qrcode/qrcode.png b/plugins/qrcode/qrcode.png
new file mode 100644
index 00000000..c2cfa476
--- /dev/null
+++ b/plugins/qrcode/qrcode.png
diff --git a/plugins/qrcode/shaarli-qrcode.js b/plugins/qrcode/shaarli-qrcode.js
new file mode 100644
index 00000000..0a8de21d
--- /dev/null
+++ b/plugins/qrcode/shaarli-qrcode.js
@@ -0,0 +1,56 @@
+// Show the QR-Code of a permalink (when the QR-Code icon is clicked).
+function showQrCode(caller,loading)
+{ 
+    // Dynamic javascript lib loading: We only load qr.js if the QR code icon is clicked:
+    if (typeof(qr) == 'undefined') // Load qr.js only if not present.
+    {
+        if (!loading)  // If javascript lib is still loading, do not append script to body.
+        {
+            var element = document.createElement("script");
+            element.src = "plugins/qrcode/qr-1.1.3.min.js";
+            document.body.appendChild(element);
+        }
+        setTimeout(function() { showQrCode(caller,true);}, 200); // Retry in 200 milliseconds.
+        return false;
+    }
+
+    // Remove previous qrcode if present.
+    removeQrcode();
+    
+    // Build the div which contains the QR-Code:
+    var element = document.createElement('div');
+    element.id="permalinkQrcode";
+
+        // Make QR-Code div commit sepuku when clicked:
+    if ( element.attachEvent ){
+        element.attachEvent('onclick', 'this.parentNode.removeChild(this);' );
+
+    } else {
+        // Damn IE
+        element.setAttribute('onclick', 'this.parentNode.removeChild(this);' );
+    }
+    
+    // Build the QR-Code:
+    var image = qr.image({size: 8,value: caller.dataset.permalink});
+    if (image)
+    { 
+        element.appendChild(image);
+        element.innerHTML += "<br>Click to close";
+        caller.parentNode.appendChild(element);
+    }
+    else
+    {
+        element.innerHTML = "Your browser does not seem to be HTML5 compatible.";
+    }
+    return false;
+}
+
+// Remove any displayed QR-Code
+function removeQrcode()
+{
+    var elem = document.getElementById("permalinkQrcode");
+    if (elem) {
+        elem.parentNode.removeChild(elem);
+    }
+    return false;
+}
\ No newline at end of file
diff --git a/tests/plugins/PlugQrcodeTest.php b/tests/plugins/PlugQrcodeTest.php
new file mode 100644
index 00000000..86dc7f29
--- /dev/null
+++ b/tests/plugins/PlugQrcodeTest.php
@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * PlugQrcodeTest.php
+ */
+
+require_once 'plugins/qrcode/qrcode.php';
+require_once 'application/Router.php';
+
+/**
+ * Class PlugQrcodeTest
+ * Unit test for the QR-Code plugin
+ */
+class PlugQrcodeTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Reset plugin path
+     */
+    function setUp() {
+        PluginManager::$PLUGINS_PATH = 'plugins';
+    }
+
+    /**
+     * Test render_linklist hook.
+     */
+    function testQrcodeLinklist()
+    {
+        $str = 'http://randomstr.com/test';
+        $data = array(
+            'title' => $str,
+            'links' => array(
+                array(
+                    'url' => $str,
+                )
+            )
+        );
+
+        $data = hook_qrcode_render_linklist($data);
+        $link = $data['links'][0];
+        // data shouldn't be altered
+        $this->assertEquals($str, $data['title']);
+        $this->assertEquals($str, $link['url']);
+
+        // plugin data
+        $this->assertEquals(1, count($link['link_plugin']));
+        $this->assertNotFalse(strpos($link['link_plugin'][0], $str));
+    }
+
+    /**
+     * Test render_footer hook.
+     */
+    function testQrcodeFooter()
+    {
+        $str = 'stuff';
+        $data = array($str => $str);
+        $data['_PAGE_'] = Router::$PAGE_LINKLIST;
+
+        $data = hook_qrcode_render_footer($data);
+        $this->assertEquals($str, $data[$str]);
+        $this->assertEquals(1, count($data['js_files']));
+
+        $data = array($str => $str);
+        $data['_PAGE_'] = $str;
+        $this->assertEquals($str, $data[$str]);
+        $this->assertArrayNotHasKey('js_files', $data);
+    }
+}