@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
135 lines (134 loc) • 6.23 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.BrowserSvgCodeWriter = void 0;
var EncodeHintType_1 = require("../core/EncodeHintType");
var Encoder_1 = require("../core/qrcode/encoder/Encoder");
var ErrorCorrectionLevel_1 = require("../core/qrcode/decoder/ErrorCorrectionLevel");
var IllegalArgumentException_1 = require("../core/IllegalArgumentException");
var IllegalStateException_1 = require("../core/IllegalStateException");
/**
* @deprecated Moving to @zxing/browser
*/
var BrowserSvgCodeWriter = /** @class */ (function () {
/**
* Constructs. 😉
*/
function BrowserSvgCodeWriter(containerElement) {
if (typeof containerElement === 'string') {
this.containerElement = document.getElementById(containerElement);
}
else {
this.containerElement = containerElement;
}
}
/**
* Writes the QR code to a SVG and renders it in the container.
*/
BrowserSvgCodeWriter.prototype.write = function (contents, width, height, hints) {
if (hints === void 0) { hints = null; }
if (contents.length === 0) {
throw new IllegalArgumentException_1.default('Found empty contents');
}
if (width < 0 || height < 0) {
throw new IllegalArgumentException_1.default('Requested dimensions are too small: ' + width + 'x' + height);
}
var quietZone = hints && hints.get(EncodeHintType_1.default.MARGIN) !== undefined
? Number.parseInt(hints.get(EncodeHintType_1.default.MARGIN).toString(), 10)
: BrowserSvgCodeWriter.QUIET_ZONE_SIZE;
var code = this.encode(hints, contents);
return this.renderResult(code, width, height, quietZone);
};
/**
* Encodes the content to a Barcode type.
*/
BrowserSvgCodeWriter.prototype.encode = function (hints, contents) {
var errorCorrectionLevel = ErrorCorrectionLevel_1.default.L;
if (hints && hints.get(EncodeHintType_1.default.ERROR_CORRECTION) !== undefined) {
errorCorrectionLevel = ErrorCorrectionLevel_1.default.fromString(hints.get(EncodeHintType_1.default.ERROR_CORRECTION).toString());
}
var code = Encoder_1.default.encode(contents, errorCorrectionLevel, hints);
return code;
};
/**
* Renders the SVG in the container.
*
* @note the input matrix uses 0 == white, 1 == black. The output matrix uses 0 == black, 255 == white (i.e. an 8 bit greyscale bitmap).
*/
BrowserSvgCodeWriter.prototype.renderResult = function (code, width /*int*/, height /*int*/, quietZone /*int*/) {
// if (this.format && format != this.format) {
// throw new IllegalArgumentException("Can only encode QR_CODE, but got " + format)
// }
var input = code.getMatrix();
if (input === null) {
throw new IllegalStateException_1.default();
}
var inputWidth = input.getWidth();
var inputHeight = input.getHeight();
var qrWidth = inputWidth + (quietZone * 2);
var qrHeight = inputHeight + (quietZone * 2);
var outputWidth = Math.max(width, qrWidth);
var outputHeight = Math.max(height, qrHeight);
var multiple = Math.min(Math.floor(outputWidth / qrWidth), Math.floor(outputHeight / qrHeight));
// Padding includes both the quiet zone and the extra white pixels to accommodate the requested
// dimensions. For example, if input is 25x25 the QR will be 33x33 including the quiet zone.
// If the requested size is 200x160, the multiple will be 4, for a QR of 132x132. These will
// handle all the padding from 100x100 (the actual QR) up to 200x160.
var leftPadding = Math.floor((outputWidth - (inputWidth * multiple)) / 2);
var topPadding = Math.floor((outputHeight - (inputHeight * multiple)) / 2);
var svgElement = this.createSVGElement(outputWidth, outputHeight);
var placeholder = this.createSvgPathPlaceholderElement(width, height);
svgElement.append(placeholder);
this.containerElement.appendChild(svgElement);
// 2D loop
for (var inputY = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
// Write the contents of this row of the barcode
for (var inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
if (input.get(inputX, inputY) === 1) {
var svgRectElement = this.createSvgRectElement(outputX, outputY, multiple, multiple);
svgElement.appendChild(svgRectElement);
}
}
}
return svgElement;
};
/**
* Creates a SVG element.
*/
BrowserSvgCodeWriter.prototype.createSVGElement = function (w, h) {
var el = document.createElementNS(BrowserSvgCodeWriter.SVG_NS, 'svg');
el.setAttributeNS(null, 'width', h.toString());
el.setAttributeNS(null, 'height', w.toString());
return el;
};
/**
* Creates a SVG rect.
*/
BrowserSvgCodeWriter.prototype.createSvgPathPlaceholderElement = function (w, h) {
var el = document.createElementNS(BrowserSvgCodeWriter.SVG_NS, 'path');
el.setAttributeNS(null, 'd', "M0 0h" + w + "v" + h + "H0z");
el.setAttributeNS(null, 'fill', 'none');
return el;
};
/**
* Creates a SVG rect.
*/
BrowserSvgCodeWriter.prototype.createSvgRectElement = function (x, y, w, h) {
var el = document.createElementNS(BrowserSvgCodeWriter.SVG_NS, 'rect');
el.setAttributeNS(null, 'x', x.toString());
el.setAttributeNS(null, 'y', y.toString());
el.setAttributeNS(null, 'height', w.toString());
el.setAttributeNS(null, 'width', h.toString());
el.setAttributeNS(null, 'fill', '#000000');
return el;
};
/**
* Default quiet zone in pixels.
*/
BrowserSvgCodeWriter.QUIET_ZONE_SIZE = 4;
/**
* SVG markup NameSpace
*/
BrowserSvgCodeWriter.SVG_NS = 'http://www.w3.org/2000/svg';
return BrowserSvgCodeWriter;
}());
exports.BrowserSvgCodeWriter = BrowserSvgCodeWriter;