@syncfusion/ej2-barcode-generator
Version:
Barcode generator component is a pure JavaScript library which will convert a string to Barcode and show it to the user. This supports major 1D and 2D barcodes including coda bar, code 128, QR Code.
116 lines (107 loc) • 4.19 kB
text/typescript
import { OneDimension } from '../one-dimension';
/**
* code39 used to calculate the barcode of type 39
*/
export class Code39 extends OneDimension {
/**
* get the code value.
*
* @returns {string[]} return the code value.
* @private
*/
private getCodeValue(): string[] {
const codes: string[] = ['111221211', '211211112', '112211112',
'212211111', '111221112', '211221111', '112221111', '111211212',
'211211211', '112211211', '211112112', '112112112', '212112111', '111122112', '211122111', '112122111',
'111112212', '211112211', '112112211', '111122211', '211111122', '112111122', '212111121', '111121122',
'211121121', '112121121', '111111222', '211111221', '112111221', '111121221', '221111112', '122111112',
'222111111', '121121112', '221121111', '122121111', '121111212', '221111211', '122111211', '121121211',
'121212111', '121211121', '121112121', '111212121'];
return codes;
}
/**
* Provide the string value.
*
* @returns {string} Provide the string value.
* @private
*/
private getCharacter(): string {
const characters: string = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%';
return characters;
}
/**
*Check sum method for the code 39 bar code
*
* @param {string} char - Provide the canvas element .
* @param {string} characters - Provide the canvas element .
* @returns {number}Check sum method for the code 39 bar code
* @private
*/
private checkSum(char: string, characters: string): number {
let checksum: number = 0;
for (let i: number = 0; i < char.length; i++) {
const codeNumber: number = characters.indexOf(char[parseInt(i.toString(), 10)]);
checksum += codeNumber;
}
checksum = checksum % 43;
return checksum;
}
/**
* Validate the given input.
*
* @returns {string} Validate the given input.
* @param {string} char - Provide the canvas element .
* @private
*/
public validateInput(char: string): string {
// eslint-disable-next-line
if (char.search(/^[0-9A-Z\-\.\ \$\/\+\%]+$/) === -1) {
return 'Supports A-Z, 0-9, and symbols ( - . $ / + % SPACE).';
} else {
return undefined;
}
}
private getPatternCollection(givenChar: string, characters: string): string[] {
let codeNumber: number;
const code: string[] = [];
const codes: string[] = this.getCodeValue();
for (let i: number = 0; i < givenChar.length; i++) {
codeNumber = characters.indexOf(givenChar.charAt(i));
code.push(codes[parseInt(codeNumber.toString(), 10)]);
}
return code;
}
private appendStartStopCharacters(char: string): string {
return '*' + char + '*';
}
/**
* Draw the barcode SVG.\
*
* @returns {void} Draw the barcode SVG .
* @param {HTMLElement} canvas - Provide the canvas element .
* @param {HTMLElement} encodedCharacter - Provide the canvas element .
* @private
*/
public drawCode39Extension(canvas: HTMLElement, encodedCharacter: string): void {
this.draw(canvas, encodedCharacter);
}
/**
* Draw the barcode SVG.\
*
* @returns {void} Draw the barcode SVG .
* @param {HTMLElement} canvas - Provide the canvas element .
* @param {HTMLElement} encodedCharacter - Provide the canvas element .
* @private
*/
public draw(canvas: HTMLElement, encodedCharacter?: string): void {
let givenCharacter: string = encodedCharacter ? encodedCharacter : this.value;
const characters: string = this.getCharacter();
if (this.enableCheckSum) {
const checkSum: number = this.checkSum(givenCharacter, characters);
givenCharacter += checkSum;
}
givenCharacter = this.appendStartStopCharacters(givenCharacter);
const code: string[] = this.getPatternCollection(givenCharacter, characters);
this.calculateBarCodeAttributes(code, canvas);
}
}