lindell / JsBarcode

function getEncodingHeight(encoding, options){

	return options.height +

		((options.displayValue && encoding.text.length > 0) ? options.fontSize : 0) +

		options.textMargin +

		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){

	for(let i = 0; i < encodings.length; i++){

		var encoding = encodings[i];

		var options = merge(barcodeOptions, encoding.options);

		// Calculate the width of the encoding

		var textWidth = messureText(encoding.text, options);

		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 getMaximumHeightOfEncodings(encodings){

	var maxHeight = 0;

	for(let i = 0; i < encodings.length; i++){

		if(encodings[i].height > maxHeight){

			maxHeight = encodings[i].height;

		}

	}

	return maxHeight;

}

function messureText(string, options){

	// Set font

	var ctx = document.createElement("canvas").getContext("2d");

	ctx.font = options.fontOptions + " " + options.fontSize + "px " + options.font;

	// Calculate the width of the encoding

	var size = ctx.measureText(string).width;

	return size;

}

export {getMaximumHeightOfEncodings, getEncodingHeight, getBarcodePadding, calculateEncodingAttributes, getTotalWidthOfEncodings};