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Adds options to set version range.

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Lars Jung
2013-07-23 18:45:07 +02:00
parent 4941fdd402
commit 830be03164
1 changed files with 18 additions and 16 deletions
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src/jquery.qrcode.js
+18 -16
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@@ -14,24 +14,26 @@
}()), }()),
// Wrapper for the original QR code generator. // Wrapper for the original QR code generator.
createQr = function (typeNumber, correctionLevel, text) { createQr = function (version, level, text) {
// `qrcode` is the single public function that will be defined by the `QR Code Generator` // `qrcode` is the single public function that will be defined by the `QR Code Generator`
// at the end of the file. // at the end of the file.
var qr = qrcode(typeNumber, correctionLevel); var qr = qrcode(version, level);
qr.addData(text); qr.addData(text);
qr.make(); qr.make();
return qr; return qr;
}, },
// Returns a minimal QR code for the given text. Returns `null` if `text` // Returns a minimal QR code for the given text starting with version `minVersion`.
// is to long to be encoded. At the moment it should work with up to ~2900 characters. // Returns `null` if `text` is too long to be encoded in `maxVersion`.
createBestQr = function (text, correctionLevel) { createBestQr = function (minVersion, maxVersion, level, text) {
for (var type = 2; type <= 40; type += 1) { minVersion = Math.max(1, minVersion);
maxVersion = Math.min(40, maxVersion);
for (var type = minVersion; type <= maxVersion; type += 1) {
try { try {
return createQr(type, correctionLevel, text); return createQr(type, level, text);
} catch (err) {} } catch (err) {}
} }
@@ -42,16 +44,14 @@
drawOnCanvas = function (canvas, settings) { drawOnCanvas = function (canvas, settings) {
// some shortcuts to improve compression // some shortcuts to improve compression
var settings_text = settings.text, var settings_left = settings.left,
settings_ecl = settings.ecl,
settings_left = settings.left,
settings_top = settings.top, settings_top = settings.top,
settings_width = settings.width, settings_width = settings.width,
settings_height = settings.height, settings_height = settings.height,
settings_color = settings.color, settings_color = settings.color,
settings_bgColor = settings.bgColor, settings_bgColor = settings.bgColor,
qr = createBestQr(settings_text, settings_ecl), qr = createBestQr(settings.minVersion, settings.maxVersion, settings.ecLevel, settings.text),
$canvas = $(canvas), $canvas = $(canvas),
ctx = $canvas[0].getContext('2d'); ctx = $canvas[0].getContext('2d');
@@ -93,15 +93,13 @@
createDiv = function (settings) { createDiv = function (settings) {
// some shortcuts to improve compression // some shortcuts to improve compression
var settings_text = settings.text, var settings_width = settings.width,
settings_ecl = settings.ecl,
settings_width = settings.width,
settings_height = settings.height, settings_height = settings.height,
settings_color = settings.color, settings_color = settings.color,
settings_bgColor = settings.bgColor, settings_bgColor = settings.bgColor,
math_floor = Math.floor, math_floor = Math.floor,
qr = createBestQr(settings_text, settings_ecl), qr = createBestQr(settings.minVersion, settings.maxVersion, settings.ecLevel, settings.text),
$div = $('<div/>').css({ $div = $('<div/>').css({
position: 'relative', position: 'relative',
left: 0, left: 0,
@@ -166,8 +164,12 @@
// render method: `'canvas'` or `'div'` // render method: `'canvas'` or `'div'`
render: 'canvas', render: 'canvas',
// version range somewhere in 1..40
minVersion: 2,
maxVersion: 40,
// error correction level: `'L'`, `'M'`, `'Q'` or `'H'` // error correction level: `'L'`, `'M'`, `'Q'` or `'H'`
ecl: 'L', ecLevel: 'L',
// left and top in pixel if drawn onto existing canvas // left and top in pixel if drawn onto existing canvas
left: 0, left: 0,