介绍

生成条形码编码数据和布局信息。

使用

import { barcode, calculateBarcodeLayout } from 'sard-uniapp'

const encodings = barcode('123456789012', {
  format: 'EAN13',
})

const layout = calculateBarcodeLayout(encodings, () => 0)

接口

barcode

function barcode(value: string, options?: BarcodeOptions): BarcodeEncoding[]

根据条形码类型返回编码后的条纹数据。不同格式可能会拆成多个编码段，例如 EAN13 和 UPC-A。

calculateBarcodeLayout

function calculateBarcodeLayout(
  encodings: BarcodeEncoding[],
  measureText: (text: string, options: BarcodeRenderOptions) => number,
): BarcodeLayout

根据编码结果和文本测量函数，计算条形码渲染所需的宽高及各段布局。

BarcodeOptions

export interface BarcodeOptions {
  format?: BarcodeFormat
  width?: number
  height?: number
  color?: string
  background?: string
  displayValue?: boolean
  text?: string
  textPosition?: BarcodeTextPosition
  textAlign?: CanvasTextAlign
  textMargin?: number
  fontStyle?: CanvasFontStyle
  fontWeight?: CanvasFontWeight
  fontSize?: number
  fontFamily?: string
  margin?: number
  marginTop?: number
  marginBottom?: number
  marginLeft?: number
  marginRight?: number
  ean128?: boolean
  flat?: boolean
  lastChar?: string
}

BarcodeEncoding

export interface BarcodeEncoding {
  data: string
  text: string
  options: BarcodeRenderOptions
}

BarcodeRenderOptions

export interface BarcodeRenderOptions {
  format: BarcodeFormat
  width: number
  height: number
  lineColor: string
  background: string
  displayValue: boolean
  text?: string
  textPosition: BarcodeTextPosition
  textAlign: CanvasTextAlign
  textMargin: number
  fontStyle: CanvasFontStyle
  fontWeight: CanvasFontWeight
  fontSize: number
  fontFamily: string
  margin: number
  marginTop: number
  marginBottom: number
  marginLeft: number
  marginRight: number
  ean128?: boolean
  flat?: boolean
  lastChar?: string
}

BarcodeLayout

export interface BarcodeLayout {
  width: number
  height: number
  segments: BarcodeLayoutSegment[]
}

BarcodeLayoutSegment

export interface BarcodeLayoutSegment extends BarcodeEncoding {
  width: number
  height: number
  textWidth: number
  barcodeWidth: number
  barcodePadding: number
}

BarcodeFormat

type BarcodeFormat = 'CODE128' | 'EAN13' | 'UPC-A' | 'ITF14'

BarcodeTextPosition

type BarcodeTextPosition = 'top' | 'bottom'

CanvasTextAlign

type CanvasTextAlign = 'center' | 'end' | 'left' | 'right' | 'start'

CanvasTextAlign

type CanvasFontStyle = 'normal' | 'italic' | 'oblique' | (string & {})

CanvasFontWeight

type CanvasFontWeight =
  | 'normal'
  | 'bold'
  | number
  | 'lighter'
  | 'bolder'
  | (string & {})