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Viewing file:     svg.js (5.8 KB)      -rw-r--r--

"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;