Barcode Generation

node_modules/jsbarcode/bin/renderers/shared.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+	value: true
+});
+exports.getTotalWidthOfEncodings = exports.calculateEncodingAttributes = exports.getBarcodePadding = exports.getEncodingHeight = exports.getMaximumHeightOfEncodings = undefined;
+
+var _merge = require("../help/merge.js");
+
+var _merge2 = _interopRequireDefault(_merge);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function getEncodingHeight(encoding, options) {
+	return options.height + (options.displayValue && encoding.text.length > 0 ? options.fontSize + options.textMargin : 0) + options.marginTop + options.marginBottom;
+}
+
+function getBarcodePadding(textWidth, barcodeWidth, options) {
+	if (options.displayValue && barcodeWidth < textWidth) {
+		if (options.textAlign == "center") {
+			return Math.floor((textWidth - barcodeWidth) / 2);
+		} else if (options.textAlign == "left") {
+			return 0;
+		} else if (options.textAlign == "right") {
+			return Math.floor(textWidth - barcodeWidth);
+		}
+	}
+	return 0;
+}
+
+function calculateEncodingAttributes(encodings, barcodeOptions, context) {
+	for (var i = 0; i < encodings.length; i++) {
+		var encoding = encodings[i];
+		var options = (0, _merge2.default)(barcodeOptions, encoding.options);
+
+		// Calculate the width of the encoding
+		var textWidth;
+		if (options.displayValue) {
+			textWidth = messureText(encoding.text, options, context);
+		} else {
+			textWidth = 0;
+		}
+
+		var barcodeWidth = encoding.data.length * options.width;
+		encoding.width = Math.ceil(Math.max(textWidth, barcodeWidth));
+
+		encoding.height = getEncodingHeight(encoding, options);
+
+		encoding.barcodePadding = getBarcodePadding(textWidth, barcodeWidth, options);
+	}
+}
+
+function getTotalWidthOfEncodings(encodings) {
+	var totalWidth = 0;
+	for (var i = 0; i < encodings.length; i++) {
+		totalWidth += encodings[i].width;
+	}
+	return totalWidth;
+}
+
+function getMaximumHeightOfEncodings(encodings) {
+	var maxHeight = 0;
+	for (var i = 0; i < encodings.length; i++) {
+		if (encodings[i].height > maxHeight) {
+			maxHeight = encodings[i].height;
+		}
+	}
+	return maxHeight;
+}
+
+function messureText(string, options, context) {
+	var ctx;
+
+	if (context) {
+		ctx = context;
+	} else if (typeof document !== "undefined") {
+		ctx = document.createElement("canvas").getContext("2d");
+	} else {
+		// If the text cannot be messured we will return 0.
+		// This will make some barcode with big text render incorrectly
+		return 0;
+	}
+	ctx.font = options.fontOptions + " " + options.fontSize + "px " + options.font;
+
+	// Calculate the width of the encoding
+	var measureTextResult = ctx.measureText(string);
+	if (!measureTextResult) {
+		// Some implementations don't implement measureText and return undefined.
+		// If the text cannot be measured we will return 0.
+		// This will make some barcode with big text render incorrectly
+		return 0;
+	}
+	var size = measureTextResult.width;
+	return size;
+}
+
+exports.getMaximumHeightOfEncodings = getMaximumHeightOfEncodings;
+exports.getEncodingHeight = getEncodingHeight;
+exports.getBarcodePadding = getBarcodePadding;
+exports.calculateEncodingAttributes = calculateEncodingAttributes;
+exports.getTotalWidthOfEncodings = getTotalWidthOfEncodings;