Barcode Generation

node_modules/jsbarcode/bin/renderers/svg.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+	value: true
+});
+
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+var _merge = require("../help/merge.js");
+
+var _merge2 = _interopRequireDefault(_merge);
+
+var _shared = require("./shared.js");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var svgns = "http://www.w3.org/2000/svg";
+
+var SVGRenderer = function () {
+	function SVGRenderer(svg, encodings, options) {
+		_classCallCheck(this, SVGRenderer);
+
+		this.svg = svg;
+		this.encodings = encodings;
+		this.options = options;
+		this.document = options.xmlDocument || document;
+	}
+
+	_createClass(SVGRenderer, [{
+		key: "render",
+		value: function render() {
+			var currentX = this.options.marginLeft;
+
+			this.prepareSVG();
+			for (var i = 0; i < this.encodings.length; i++) {
+				var encoding = this.encodings[i];
+				var encodingOptions = (0, _merge2.default)(this.options, encoding.options);
+
+				var group = this.createGroup(currentX, encodingOptions.marginTop, this.svg);
+
+				this.setGroupOptions(group, encodingOptions);
+
+				this.drawSvgBarcode(group, encodingOptions, encoding);
+				this.drawSVGText(group, encodingOptions, encoding);
+
+				currentX += encoding.width;
+			}
+		}
+	}, {
+		key: "prepareSVG",
+		value: function prepareSVG() {
+			// Clear the SVG
+			while (this.svg.firstChild) {
+				this.svg.removeChild(this.svg.firstChild);
+			}
+
+			(0, _shared.calculateEncodingAttributes)(this.encodings, this.options);
+			var totalWidth = (0, _shared.getTotalWidthOfEncodings)(this.encodings);
+			var maxHeight = (0, _shared.getMaximumHeightOfEncodings)(this.encodings);
+
+			var width = totalWidth + this.options.marginLeft + this.options.marginRight;
+			this.setSvgAttributes(width, maxHeight);
+
+			if (this.options.background) {
+				this.drawRect(0, 0, width, maxHeight, this.svg).setAttribute("style", "fill:" + this.options.background + ";");
+			}
+		}
+	}, {
+		key: "drawSvgBarcode",
+		value: function drawSvgBarcode(parent, options, encoding) {
+			var binary = encoding.data;
+
+			// Creates the barcode out of the encoded binary
+			var yFrom;
+			if (options.textPosition == "top") {
+				yFrom = options.fontSize + options.textMargin;
+			} else {
+				yFrom = 0;
+			}
+
+			var barWidth = 0;
+			var x = 0;
+			for (var b = 0; b < binary.length; b++) {
+				x = b * options.width + encoding.barcodePadding;
+
+				if (binary[b] === "1") {
+					barWidth++;
+				} else if (barWidth > 0) {
+					this.drawRect(x - options.width * barWidth, yFrom, options.width * barWidth, options.height, parent);
+					barWidth = 0;
+				}
+			}
+
+			// Last draw is needed since the barcode ends with 1
+			if (barWidth > 0) {
+				this.drawRect(x - options.width * (barWidth - 1), yFrom, options.width * barWidth, options.height, parent);
+			}
+		}
+	}, {
+		key: "drawSVGText",
+		value: function drawSVGText(parent, options, encoding) {
+			var textElem = this.document.createElementNS(svgns, 'text');
+
+			// Draw the text if displayValue is set
+			if (options.displayValue) {
+				var x, y;
+
+				textElem.setAttribute("style", "font:" + options.fontOptions + " " + options.fontSize + "px " + options.font);
+
+				if (options.textPosition == "top") {
+					y = options.fontSize - options.textMargin;
+				} else {
+					y = options.height + options.textMargin + options.fontSize;
+				}
+
+				// Draw the text in the correct X depending on the textAlign option
+				if (options.textAlign == "left" || encoding.barcodePadding > 0) {
+					x = 0;
+					textElem.setAttribute("text-anchor", "start");
+				} else if (options.textAlign == "right") {
+					x = encoding.width - 1;
+					textElem.setAttribute("text-anchor", "end");
+				}
+				// In all other cases, center the text
+				else {
+						x = encoding.width / 2;
+						textElem.setAttribute("text-anchor", "middle");
+					}
+
+				textElem.setAttribute("x", x);
+				textElem.setAttribute("y", y);
+
+				textElem.appendChild(this.document.createTextNode(encoding.text));
+
+				parent.appendChild(textElem);
+			}
+		}
+	}, {
+		key: "setSvgAttributes",
+		value: function setSvgAttributes(width, height) {
+			var svg = this.svg;
+			svg.setAttribute("width", width + "px");
+			svg.setAttribute("height", height + "px");
+			svg.setAttribute("x", "0px");
+			svg.setAttribute("y", "0px");
+			svg.setAttribute("viewBox", "0 0 " + width + " " + height);
+
+			svg.setAttribute("xmlns", svgns);
+			svg.setAttribute("version", "1.1");
+
+			svg.setAttribute("style", "transform: translate(0,0)");
+		}
+	}, {
+		key: "createGroup",
+		value: function createGroup(x, y, parent) {
+			var group = this.document.createElementNS(svgns, 'g');
+			group.setAttribute("transform", "translate(" + x + ", " + y + ")");
+
+			parent.appendChild(group);
+
+			return group;
+		}
+	}, {
+		key: "setGroupOptions",
+		value: function setGroupOptions(group, options) {
+			group.setAttribute("style", "fill:" + options.lineColor + ";");
+		}
+	}, {
+		key: "drawRect",
+		value: function drawRect(x, y, width, height, parent) {
+			var rect = this.document.createElementNS(svgns, 'rect');
+
+			rect.setAttribute("x", x);
+			rect.setAttribute("y", y);
+			rect.setAttribute("width", width);
+			rect.setAttribute("height", height);
+
+			parent.appendChild(rect);
+
+			return rect;
+		}
+	}]);
+
+	return SVGRenderer;
+}();
+
+exports.default = SVGRenderer;