[发布优惠券提货券index报错]

This commit is contained in:
2021-10-20 16:37:18 +08:00
parent 6b2293f8eb
commit d69486541b
9 changed files with 1834 additions and 6 deletions

View File

@@ -0,0 +1,218 @@
<script>
import Painter from './painter'
import { equal } from './util'
export default {
name: 'VueCanvasPoster',
props: {
painting: {
type: Object,
default: function() {
return {}
}
},
dirty: {
type: Boolean,
default: false
},
widthPixels: {
type: Number,
default: 750
}
},
watch: {
painting: {
handler(newVal, oldVal) {
if (this.isNeedRefresh(newVal, oldVal)) {
this.paintCount = 0
this.startPaint()
}
},
deep: true,
immediate: true
}
},
data() {
return {
paintCount: 0,
painterStyle: '',
canvasWidthInPx: 375,
canvasHeightInPx: 375,
width: 100,
height: 100,
canvas: null,
ctx: null
}
},
render(h) {
return h('div', [
h('canvas', {
ref: 'canvas',
class: 'canvas',
style: this.painterStyle
})
])
},
mounted() {
this.$nextTick(() => {
this.canvas = this.$refs.canvas // 指定canvas
this.ctx = this.canvas.getContext('2d') //设置2D渲染区域
})
},
methods: {
/**
* 判断一个 object 是否为 空
* @param {object} object
*/
isEmpty(object) {
for (const i in object) {
return false
}
return true
},
isNeedRefresh(newVal, oldVal) {
if (!newVal || this.isEmpty(newVal) || (this.dirty && equal(newVal, oldVal))) {
return false
}
return true
},
// 开始绘画
startPaint() {
if (this.isEmpty(this.painting)) {
return
}
setStringPrototype(1)
// 下载图片
this.downloadImages()
.then(res => {
const { width, height } = res
if (!width || !height) {
console.error(`You should set width and height correctly for painter, width: ${width}, height: ${height}`)
return
}
this.canvasWidthInPx = width.toPx()
if (this.widthPixels) {
// 重设宽度,高度
setStringPrototype(this.widthPixels / this.canvasWidthInPx)
this.canvasWidthInPx = this.widthPixels
}
this.canvasHeightInPx = height.toPx()
this.painterStyle = `width:${this.canvasWidthInPx}px;height:${this.canvasHeightInPx}px;`
this.canvas = this.$refs.canvas // 指定canvas
this.canvas.width = this.canvasWidthInPx
this.canvas.height = this.canvasHeightInPx
const ctx = this.canvas.getContext('2d') //设置2D渲染区域
const pen = new Painter(ctx, res)
pen.paint(() => {
var imageBase64 = this.canvas.toDataURL('image/png')
this.$emit('success', imageBase64)
})
})
.catch(err => {
this.$emit('fail', err)
})
},
// 下载所有图片
downloadImages() {
return new Promise((resolve) => {
let preCount = 0
let completeCount = 0
const paintCopy = JSON.parse(JSON.stringify(this.painting))
if (paintCopy.background) {
preCount++
this.loadImage(paintCopy.background).then(
image => {
paintCopy.background = image
completeCount++
preCount === completeCount && resolve(paintCopy)
},
err => {
completeCount++
preCount === completeCount && resolve(paintCopy)
console.log(err)
}
)
}
if (paintCopy.views) {
for (const view of paintCopy.views) {
if (view && view.type === 'image' && view.url) {
preCount++
/* eslint-disable no-loop-func */
this.loadImage(view.url).then(
image => {
completeCount++
view.url = image
// 获得一下图片信息,供后续裁减使用
view.sWidth = image.width
view.sHeight = image.height
preCount === completeCount && resolve(paintCopy)
},
err => {
completeCount++
preCount === completeCount && resolve(paintCopy)
console.log(err)
}
)
}
}
}
preCount === 0 && resolve(paintCopy)
// if (preCount !== completeCount) {
// reject('paintCopy');
// }
})
},
// 下载图片
loadImage(src) {
return new Promise((resolve, reject) => {
if (src.startsWith('#')) {
resolve(src)
return
}
const img = new Image()
img.onload = () => resolve(img)
img.onerror = () => reject(`下载图片失败 ${src}`)
img.crossOrigin = 'anonymous'
img.src = src
if (img.complete === true) {
// Inline XML images may fail to parse, throwing an Error later on
setTimeout(() => resolve(img), 500)
}
})
}
}
}
function setStringPrototype(scale) {
/* eslint-disable no-extend-native */
/**
* 是否支持负数
* @param {Boolean} minus 是否支持负数
*/
String.prototype.toPx = function toPx(minus, baseSize) {
if (this === '0') {
return 0
}
let reg
if (minus) {
reg = /^-?[0-9]+([.]{1}[0-9]+){0,1}(px|%)$/g
} else {
reg = /^[0-9]+([.]{1}[0-9]+){0,1}(px|%)$/g
}
const results = reg.exec(this)
const unit = results[2]
const value = parseFloat(this)
let res = 0
if (unit === 'px') {
res = Math.round(value * (scale || 1))
} else if (unit === '%') {
res = Math.round((value * baseSize) / 100)
}
return res
}
}
</script>
<style scoped>
.canvas {
position: fixed;
top: 2000px;
}
</style>

View File

@@ -0,0 +1,102 @@
/* eslint-disable */
export const api = {
isGradient: function(bg) {
if (bg && (bg.startsWith('linear') || bg.startsWith('radial'))) {
return true
}
return false
},
doGradient: function(bg, width, height, ctx) {
if (bg.startsWith('linear')) {
linearEffect(width, height, bg, ctx)
} else if (bg.startsWith('radial')) {
radialEffect(width, height, bg, ctx)
}
}
}
function analizeGrad(string) {
const colorPercents = string.substring(0, string.length - 1).split('%,')
const colors = []
const percents = []
for (let colorPercent of colorPercents) {
colors.push(colorPercent.substring(0, colorPercent.lastIndexOf(' ')).trim())
percents.push(colorPercent.substring(colorPercent.lastIndexOf(' '), colorPercent.length) / 100)
}
return { colors: colors, percents: percents }
}
function radialEffect(width, height, bg, ctx) {
const colorPer = analizeGrad(bg.match(/radial-gradient\((.+)\)/)[1])
const grd = ctx.createRadialGradient(0, 0, 0, 0, 0, width < height ? height / 2 : width / 2)
for (let i = 0; i < colorPer.colors.length; i++) {
grd.addColorStop(colorPer.percents[i], colorPer.colors[i])
}
ctx.fillStyle = grd
//ctx.fillRect(-(width / 2), -(height / 2), width, height);
}
function analizeLinear(bg, width, height) {
const direction = bg.match(/([-]?\d{1,3})deg/)
const dir = direction && direction[1] ? parseFloat(direction[1]) : 0
let coordinate
switch (dir) {
case 0:
coordinate = [0, -height / 2, 0, height / 2]
break
case 90:
coordinate = [width / 2, 0, -width / 2, 0]
break
case -90:
coordinate = [-width / 2, 0, width / 2, 0]
break
case 180:
coordinate = [0, height / 2, 0, -height / 2]
break
case -180:
coordinate = [0, -height / 2, 0, height / 2]
break
default:
let x1 = 0
let y1 = 0
let x2 = 0
let y2 = 0
if (direction[1] > 0 && direction[1] < 90) {
x1 = width / 2 - (((width / 2) * Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) - height / 2) * Math.sin((2 * (90 - direction[1]) * Math.PI * 2) / 360)) / 2
y2 = Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) * x1
x2 = -x1
y1 = -y2
} else if (direction[1] > -180 && direction[1] < -90) {
x1 = -(width / 2) + (((width / 2) * Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) - height / 2) * Math.sin((2 * (90 - direction[1]) * Math.PI * 2) / 360)) / 2
y2 = Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) * x1
x2 = -x1
y1 = -y2
} else if (direction[1] > 90 && direction[1] < 180) {
x1 = width / 2 + ((-(width / 2) * Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) - height / 2) * Math.sin((2 * (90 - direction[1]) * Math.PI * 2) / 360)) / 2
y2 = Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) * x1
x2 = -x1
y1 = -y2
} else {
x1 = -(width / 2) - ((-(width / 2) * Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) - height / 2) * Math.sin((2 * (90 - direction[1]) * Math.PI * 2) / 360)) / 2
y2 = Math.tan(((90 - direction[1]) * Math.PI * 2) / 360) * x1
x2 = -x1
y1 = -y2
}
coordinate = [x1, y1, x2, y2]
break
}
return coordinate
}
function linearEffect(width, height, bg, ctx) {
const param = analizeLinear(bg, width, height)
const grd = ctx.createLinearGradient(param[0], param[1], param[2], param[3])
const content = bg.match(/linear-gradient\((.+)\)/)[1]
const colorPer = analizeGrad(content.substring(content.indexOf(',') + 1))
for (let i = 0; i < colorPer.colors.length; i++) {
grd.addColorStop(colorPer.percents[i], colorPer.colors[i])
}
ctx.fillStyle = grd
//ctx.fillRect(-(width / 2), -(height / 2), width, height);
}

View File

@@ -0,0 +1,20 @@
import VueCanvasPoster from './canvas-poster'
export function install(Vue) {
Vue.component('vue-canvas-poster', VueCanvasPoster)
}
export { VueCanvasPoster }
const myPlugin = {
install
}
export default myPlugin
// Auto-install
let GlobalVue = null
if (typeof window !== 'undefined') {
GlobalVue = window.Vue
} else if (typeof global !== 'undefined') {
GlobalVue = global.Vue
}
if (GlobalVue) {
GlobalVue.use(myPlugin)
}

View File

@@ -0,0 +1,647 @@
const QR = require('./qrcode.js')
const GD = require('./gradient.js')
export default class Painter {
constructor(ctx, data) {
this.ctx = ctx
this.data = data
this.globalWidth = {}
this.globalHeight = {}
}
paint(callback) {
this.style = {
width: this.data.width.toPx(),
height: this.data.height.toPx()
}
this._background()
if (this.data.views && this.data.views.length > 0) {
for (const view of this.data.views) {
this._drawAbsolute(view)
}
}
callback && callback()
}
_background() {
this.ctx.save()
const { width, height } = this.style
const bg = this.data.background
this.ctx.translate(width / 2, height / 2)
this._doClip(this.data.borderRadius, width, height)
if (!bg) {
// 如果未设置背景,则默认使用透明色
this.ctx.fillStyle = 'transparent'
this.ctx.fillRect(-(width / 2), -(height / 2), width, height)
} else if (bg.src) {
// 背景填充图片
this.ctx.drawImage(bg, -(width / 2), -(height / 2), width, height)
}else if (bg.startsWith('#') || bg.startsWith('rgba') || bg.toLowerCase() === 'transparent') {
// 背景填充颜色
this.ctx.fillStyle = bg
this.ctx.fillRect(-(width / 2), -(height / 2), width, height)
} else if (GD.api.isGradient(bg)) {
GD.api.doGradient(bg, width, height, this.ctx)
this.ctx.fillRect(-(width / 2), -(height / 2), width, height)
}
this.ctx.restore()
}
_drawAbsolute(view) {
if (!(view && view.type)) {
// 过滤无效 view
return
}
// 证明 css 为数组形式,需要合并
if (view.css && view.css.length) {
/* eslint-disable no-param-reassign */
view.css = Object.assign(...view.css)
}
switch (view.type) {
case 'image':
this._drawAbsImage(view)
break
case 'text':
this._fillAbsText(view)
break
case 'rect':
this._drawAbsRect(view)
break
case 'qrcode':
this._drawQRCode(view)
break
default:
break
}
}
_border({ borderRadius = 0, width, height, borderWidth = 0, borderStyle = 'solid' }) {
let r1 = 0,
r2 = 0,
r3 = 0,
r4 = 0
const minSize = Math.min(width, height)
if (borderRadius) {
const border = borderRadius.split(/\s+/)
if (border.length === 4) {
r1 = Math.min(border[0].toPx(false, minSize), width / 2, height / 2)
r2 = Math.min(border[1].toPx(false, minSize), width / 2, height / 2)
r3 = Math.min(border[2].toPx(false, minSize), width / 2, height / 2)
r4 = Math.min(border[3].toPx(false, minSize), width / 2, height / 2)
} else {
r1 = r2 = r3 = r4 = Math.min(borderRadius && borderRadius.toPx(false, minSize), width / 2, height / 2)
}
}
const lineWidth = borderWidth && borderWidth.toPx(false, minSize)
this.ctx.lineWidth = lineWidth
if (borderStyle === 'dashed') {
this.ctx.setLineDash([(lineWidth * 4) / 3, (lineWidth * 4) / 3])
// this.ctx.lineDashOffset = 2 * lineWidth
} else if (borderStyle === 'dotted') {
this.ctx.setLineDash([lineWidth, lineWidth])
}
const notSolid = borderStyle !== 'solid'
this.ctx.beginPath()
notSolid && r1 === 0 && this.ctx.moveTo(-width / 2 - lineWidth, -height / 2 - lineWidth / 2) // 顶边虚线规避重叠规则
r1 !== 0 && this.ctx.arc(-width / 2 + r1, -height / 2 + r1, r1 + lineWidth / 2, 1 * Math.PI, 1.5 * Math.PI) //左上角圆弧
this.ctx.lineTo(r2 === 0 ? (notSolid ? width / 2 : width / 2 + lineWidth / 2) : width / 2 - r2, -height / 2 - lineWidth / 2) // 顶边线
notSolid && r2 === 0 && this.ctx.moveTo(width / 2 + lineWidth / 2, -height / 2 - lineWidth) // 右边虚线规避重叠规则
r2 !== 0 && this.ctx.arc(width / 2 - r2, -height / 2 + r2, r2 + lineWidth / 2, 1.5 * Math.PI, 2 * Math.PI) // 右上角圆弧
this.ctx.lineTo(width / 2 + lineWidth / 2, r3 === 0 ? (notSolid ? height / 2 : height / 2 + lineWidth / 2) : height / 2 - r3) // 右边线
notSolid && r3 === 0 && this.ctx.moveTo(width / 2 + lineWidth, height / 2 + lineWidth / 2) // 底边虚线规避重叠规则
r3 !== 0 && this.ctx.arc(width / 2 - r3, height / 2 - r3, r3 + lineWidth / 2, 0, 0.5 * Math.PI) // 右下角圆弧
this.ctx.lineTo(r4 === 0 ? (notSolid ? -width / 2 : -width / 2 - lineWidth / 2) : -width / 2 + r4, height / 2 + lineWidth / 2) // 底边线
notSolid && r4 === 0 && this.ctx.moveTo(-width / 2 - lineWidth / 2, height / 2 + lineWidth) // 左边虚线规避重叠规则
r4 !== 0 && this.ctx.arc(-width / 2 + r4, height / 2 - r4, r4 + lineWidth / 2, 0.5 * Math.PI, 1 * Math.PI) // 左下角圆弧
this.ctx.lineTo(-width / 2 - lineWidth / 2, r1 === 0 ? (notSolid ? -height / 2 : -height / 2 - lineWidth / 2) : -height / 2 + r1) // 左边线
notSolid && r1 === 0 && this.ctx.moveTo(-width / 2 - lineWidth, -height / 2 - lineWidth / 2) // 顶边虚线规避重叠规则
if (!notSolid) {
this.ctx.closePath()
}
}
/**
* 根据 borderRadius 进行裁减
*/
_doClip(borderRadius, width, height, borderStyle) {
if (borderRadius && width && height) {
// 防止在某些机型上周边有黑框现象,此处如果直接设置 fillStyle 为透明,在 Android 机型上会导致被裁减的图片也变为透明, iOS 和 IDE 上不会
// globalAlpha 在 1.9.90 起支持,低版本下无效,但把 fillStyle 设为了 white相对默认的 black 要好点
this.ctx.globalAlpha = 0
this.ctx.fillStyle = 'white'
this._border({
borderRadius,
width,
height,
borderStyle
})
this.ctx.fill()
// 在 ios 的 6.6.6 版本上 clip 有 bug禁掉此类型上的 clip也就意味着在此版本微信的 ios 设备下无法使用 border 属性
this.ctx.clip()
this.ctx.globalAlpha = 1
}
}
/**
* 画边框
*/
_doBorder(view, width, height) {
if (!view.css) {
return
}
const { borderRadius, borderWidth, borderColor, borderStyle } = view.css
if (!borderWidth) {
return
}
this.ctx.save()
this._preProcess(view, true)
this.ctx.strokeStyle = borderColor || 'black'
this._border({
borderRadius,
width,
height,
borderWidth,
borderStyle
})
this.ctx.stroke()
this.ctx.restore()
}
_preProcess(view, notClip) {
let width = 0
let height
let extra
const paddings = this._doPaddings(view)
switch (view.type) {
case 'text': {
const textArray = view.text.split('\n')
// 处理多个连续的'\n'
for (let i = 0; i < textArray.length; ++i) {
if (textArray[i] === '') {
textArray[i] = ' '
}
}
// const fontWeight = view.css.fontWeight === 'bold' ? 'bold' : 'normal'
const fontWeightArr = ['normal', 'bold', 'bolder', 'lighter', '100', '200', '300', '400', '500', '600', '700', '800', '900']
const fontWeight = fontWeightArr.includes(view.css.fontWeight) ? view.css.fontWeight : 'normal'
const textStyle = view.css.textStyle === 'italic' ? 'italic' : 'normal'
let textIndent = view.css.textIndent ? view.css.textIndent.toPx() : 0
if (!view.css.fontSize) {
view.css.fontSize = '20rpx'
}
this.ctx.font = `${textStyle} ${fontWeight} ${view.css.fontSize.toPx()}px "${view.css.fontFamily || 'sans-serif'}"`
// 计算行数
let lines = 0
const linesArray = []
for (let i = 0; i < textArray.length; ++i) {
const textLength = this.ctx.measureText(textArray[i]).width
// 最小长度
const minWidth = view.css.fontSize.toPx() + paddings[1] + paddings[3]
let partWidth = view.css.width ? view.css.width.toPx(false, this.style.width) - paddings[1] - paddings[3] : textLength
if (partWidth < minWidth) {
partWidth = minWidth
}
// textIndent 最大为一行
textIndent = textIndent > partWidth ? partWidth : textIndent
const calLines = Math.ceil((textLength + textIndent) / partWidth)
// 取最长的作为 width
width = partWidth > width ? partWidth : width
lines += calLines
linesArray[i] = calLines
}
lines = view.css.maxLines < lines ? view.css.maxLines : lines
const lineHeight = view.css.lineHeight ? view.css.lineHeight.toPx() : view.css.fontSize.toPx()
height = lineHeight * lines
extra = {
textIndent,
lines: lines,
lineHeight: lineHeight,
textArray: textArray,
linesArray: linesArray
}
break
}
case 'image': {
// 有css却未设置width或height则默认为auto
if (view.css) {
if (!view.css.width) {
view.css.width = 'auto'
}
if (!view.css.height) {
view.css.height = 'auto'
}
}
if (!view.css || (view.css.width === 'auto' && view.css.height === 'auto')) {
width = Math.round(view.sWidth)
height = Math.round(view.sHeight)
} else if (view.css.width === 'auto') {
height = view.css.height.toPx(false, this.style.height)
width = (view.sWidth / view.sHeight) * height
} else if (view.css.height === 'auto') {
width = view.css.width.toPx(false, this.style.width)
height = (view.sHeight / view.sWidth) * width
} else {
width = view.css.width.toPx(false, this.style.width)
height = view.css.height.toPx(false, this.style.height)
}
break
}
default:
if (!(view.css.width && view.css.height)) {
console.error('You should set width and height')
return
}
width = view.css.width.toPx(false, this.style.width)
height = view.css.height.toPx(false, this.style.height)
break
}
let x
if (view.css && view.css.right) {
if (typeof view.css.right === 'string') {
x = this.style.width - view.css.right.toPx(true, this.style.width)
} else {
// 可以用数组方式,把文字长度计算进去
// [right, 文字id, 乘数(默认 1]
const rights = view.css.right
x = this.style.width - rights[0].toPx(true, this.style.width) - this.globalWidth[rights[1]] * (rights[2] || 1)
}
} else if (view.css && view.css.left) {
if (typeof view.css.left === 'string') {
x = view.css.left.toPx(true, this.style.width)
} else {
const lefts = view.css.left
x = lefts[0].toPx(true, this.style.width) + this.globalWidth[lefts[1]] * (lefts[2] || 1)
}
} else {
x = 0
}
//const y = view.css && view.css.bottom ? this.style.height - height - view.css.bottom.toPx(true) : (view.css && view.css.top ? view.css.top.toPx(true) : 0);
let y
if (view.css && view.css.bottom) {
y = this.style.height - height - view.css.bottom.toPx(true, this.style.height)
} else {
if (view.css && view.css.top) {
if (typeof view.css.top === 'string') {
y = view.css.top.toPx(true, this.style.height)
} else {
const tops = view.css.top
y = tops[0].toPx(true, this.style.height) + this.globalHeight[tops[1]] * (tops[2] || 1)
}
} else {
y = 0
}
}
const angle = view.css && view.css.rotate ? this._getAngle(view.css.rotate) : 0
// 当设置了 right 时,默认 align 用 right反之用 left
const align = view.css && view.css.align ? view.css.align : view.css && view.css.right ? 'right' : 'left'
const verticalAlign = view.css && view.css.verticalAlign ? view.css.verticalAlign : 'top'
// 记录绘制时的画布
let xa = 0
switch (align) {
case 'center':
xa = x
break
case 'right':
xa = x - width / 2
break
default:
xa = x + width / 2
break
}
let ya = 0
switch (verticalAlign) {
case 'center':
ya = y
break
case 'bottom':
ya = y - height / 2
break
default:
ya = y + height / 2
break
}
this.ctx.translate(xa, ya)
// 记录该 view 的有效点击区域
// TODO ,旋转和裁剪的判断
// 记录在真实画布上的左侧
let left = x
if (align === 'center') {
left = x - width / 2
} else if (align === 'right') {
left = x - width
}
var top = y
if (verticalAlign === 'center') {
top = y - height / 2
} else if (verticalAlign === 'bottom') {
top = y - height
}
if (view.rect) {
view.rect.left = left
view.rect.top = top
view.rect.right = left + width
view.rect.bottom = top + height
view.rect.x = view.css && view.css.right ? x - width : x
view.rect.y = y
} else {
view.rect = {
left: left,
top: top,
right: left + width,
bottom: top + height,
x: view.css && view.css.right ? x - width : x,
y: y
}
}
view.rect.left = view.rect.left - paddings[3]
view.rect.top = view.rect.top - paddings[0]
view.rect.right = view.rect.right + paddings[1]
view.rect.bottom = view.rect.bottom + paddings[2]
if (view.type === 'text') {
view.rect.minWidth = view.css.fontSize.toPx() + paddings[1] + paddings[3]
}
this.ctx.rotate(angle)
if (!notClip && view.css && view.css.borderRadius && view.type !== 'rect') {
this._doClip(view.css.borderRadius, width, height, view.css.borderStyle)
}
this._doShadow(view)
if (view.id) {
this.globalWidth[view.id] = width
this.globalHeight[view.id] = height
}
return {
width: width,
height: height,
x: x,
y: y,
extra: extra
}
}
_doPaddings(view) {
const { padding } = view.css ? view.css : {}
let pd = [0, 0, 0, 0]
if (padding) {
const pdg = padding.split(/\s+/)
if (pdg.length === 1) {
const x = pdg[0].toPx()
pd = [x, x, x, x]
}
if (pdg.length === 2) {
const x = pdg[0].toPx()
const y = pdg[1].toPx()
pd = [x, y, x, y]
}
if (pdg.length === 3) {
const x = pdg[0].toPx()
const y = pdg[1].toPx()
const z = pdg[2].toPx()
pd = [x, y, z, y]
}
if (pdg.length === 4) {
const x = pdg[0].toPx()
const y = pdg[1].toPx()
const z = pdg[2].toPx()
const a = pdg[3].toPx()
pd = [x, y, z, a]
}
}
return pd
}
// 画文字的背景图片
_doBackground(view) {
this.ctx.save()
const { width: rawWidth, height: rawHeight } = this._preProcess(view, true)
const { background } = view.css
let pd = this._doPaddings(view)
const width = rawWidth + pd[1] + pd[3]
const height = rawHeight + pd[0] + pd[2]
this._doClip(view.css.borderRadius, width, height, view.css.borderStyle)
if (GD.api.isGradient(background)) {
GD.api.doGradient(background, width, height, this.ctx)
} else {
this.ctx.fillStyle = background
}
this.ctx.fillRect(-(width / 2), -(height / 2), width, height)
this.ctx.restore()
}
_drawQRCode(view) {
this.ctx.save()
const { width, height } = this._preProcess(view)
QR.api.draw(view.content, this.ctx, -width / 2, -height / 2, width, height, view.css.background, view.css.color)
this.ctx.restore()
this._doBorder(view, width, height)
}
_drawAbsImage(view) {
if (!view.url) {
return
}
this.ctx.save()
const { width, height } = this._preProcess(view)
// 图片失败
if (typeof view.url === 'string') {
this.ctx.fillStyle = '#ddd'
this.ctx.fillRect(-(width / 2), -(height / 2), width, height)
this.ctx.restore()
return
}
// 获得缩放到图片大小级别的裁减框
let rWidth = view.sWidth
let rHeight = view.sHeight
let startX = 0
let startY = 0
// 绘画区域比例
const cp = width / height
// 原图比例
const op = view.sWidth / view.sHeight
if (cp >= op) {
rHeight = rWidth / cp
startY = Math.round((view.sHeight - rHeight) / 2)
} else {
rWidth = rHeight * cp
startX = Math.round((view.sWidth - rWidth) / 2)
}
if (view.css && view.css.mode === 'scaleToFill') {
this.ctx.drawImage(view.url, -(width / 2), -(height / 2), width, height)
} else {
this.ctx.drawImage(view.url, startX, startY, rWidth, rHeight, -(width / 2), -(height / 2), width, height)
view.rect.startX = startX / view.sWidth
view.rect.startY = startY / view.sHeight
view.rect.endX = (startX + rWidth) / view.sWidth
view.rect.endY = (startY + rHeight) / view.sHeight
}
this.ctx.restore()
this._doBorder(view, width, height)
}
_fillAbsText(view) {
if (!view.text) {
return
}
if (view.css.background) {
// 生成背景
this._doBackground(view)
}
this.ctx.save()
const { width, height, extra } = this._preProcess(view, view.css.background && view.css.borderRadius)
this.ctx.fillStyle = view.css.color || 'black'
const { lines, lineHeight, textArray, linesArray, textIndent } = extra
// 如果设置了id则保留 text 的长度
if (view.id) {
let textWidth = 0
for (let i = 0; i < textArray.length; ++i) {
const _w = this.ctx.measureText(textArray[i]).width
textWidth = _w > textWidth ? _w : textWidth
}
this.globalWidth[view.id] = width ? (textWidth < width ? textWidth : width) : textWidth
}
let lineIndex = 0
let tabWidth = 0
for (let j = 0; j < textArray.length; ++j) {
const preLineLength = Math.ceil(textArray[j].length / linesArray[j])
const firstLineLength = Math.ceil(((width - textIndent) / width) * (textArray[j].length / linesArray[j]))
let start = 0
let alreadyCount = 0
for (let i = 0; i < linesArray[j]; ++i) {
// 绘制行数大于最大行数,则直接跳出循环
if (lineIndex >= lines) {
break
}
tabWidth = i == 0 ? textIndent : 0
alreadyCount = i == 0 ? firstLineLength : preLineLength
let text = textArray[j].substr(start, alreadyCount)
let measuredWith = this.ctx.measureText(text).width
// 如果测量大小小于width一个字符的大小则进行补齐如果测量大小超出 width则进行减除
// 如果已经到文本末尾,也不要进行该循环
while (start + alreadyCount <= textArray[j].length && (width - measuredWith - tabWidth > view.css.fontSize.toPx() || measuredWith - width > view.css.fontSize.toPx())) {
if (measuredWith < width) {
text = textArray[j].substr(start, ++alreadyCount)
} else {
if (text.length <= 1) {
// 如果只有一个字符时,直接跳出循环
break
}
text = textArray[j].substr(start, --alreadyCount)
// break
}
measuredWith = this.ctx.measureText(text).width
}
start += text.length
// 如果是最后一行了,发现还有未绘制完的内容,则加...
if (lineIndex === lines - 1 && (j < textArray.length - 1 || start < textArray[j].length)) {
while (this.ctx.measureText(`${text}...`).width > width) {
if (text.length <= 1) {
// 如果只有一个字符时,直接跳出循环
break
}
text = text.substring(0, text.length - 1)
}
text += '...'
measuredWith = this.ctx.measureText(text).width
}
this.ctx.textAlign = view.css.textAlign ? view.css.textAlign : 'left'
let x
let lineX
switch (view.css.textAlign) {
case 'center':
x = 0
lineX = x - measuredWith / 2 + tabWidth
break
case 'right':
x = width / 2
lineX = x - measuredWith + tabWidth
break
default:
x = -(width / 2) + tabWidth
lineX = x
break
}
const y = -(height / 2) + (lineIndex === 0 ? view.css.fontSize.toPx() : view.css.fontSize.toPx() + lineIndex * lineHeight)
lineIndex++
if (view.css.textStyle === 'stroke') {
this.ctx.strokeText(text, x, y, measuredWith)
} else {
this.ctx.fillText(text, x, y, measuredWith)
}
const fontSize = view.css.fontSize.toPx()
if (view.css.textDecoration) {
this.ctx.lineWidth = fontSize / 13
this.ctx.beginPath()
if (/\bunderline\b/.test(view.css.textDecoration)) {
this.ctx.moveTo(lineX, y)
this.ctx.lineTo(lineX + measuredWith, y)
}
if (/\boverline\b/.test(view.css.textDecoration)) {
this.ctx.moveTo(lineX, y - fontSize)
this.ctx.lineTo(lineX + measuredWith, y - fontSize)
}
if (/\bline-through\b/.test(view.css.textDecoration)) {
this.ctx.moveTo(lineX, y - fontSize / 3)
this.ctx.lineTo(lineX + measuredWith, y - fontSize / 3)
}
this.ctx.closePath()
this.ctx.strokeStyle = view.css.color
this.ctx.stroke()
}
}
}
this.ctx.restore()
this._doBorder(view, width, height)
}
_drawAbsRect(view) {
this.ctx.save()
const { width, height } = this._preProcess(view)
if (GD.api.isGradient(view.css.color)) {
GD.api.doGradient(view.css.color, width, height, this.ctx)
} else {
this.ctx.fillStyle = view.css.color
}
const { borderRadius, borderStyle, borderWidth } = view.css
this._border({
borderRadius,
width,
height,
borderWidth,
borderStyle
})
this.ctx.fill()
this.ctx.restore()
this._doBorder(view, width, height)
}
// shadow 支持 (x, y, blur, color), 不支持 spread
// shadow:0px 0px 10px rgba(0,0,0,0.1);
_doShadow(view) {
if (!view.css || !view.css.shadow) {
return
}
const box = view.css.shadow.replace(/,\s+/g, ',').split(/\s+/)
if (box.length > 4) {
console.error("shadow don't spread option")
return
}
this.ctx.shadowOffsetX = parseInt(box[0], 10)
this.ctx.shadowOffsetY = parseInt(box[1], 10)
this.ctx.shadowBlur = parseInt(box[2], 10)
this.ctx.shadowColor = box[3]
}
_getAngle(angle) {
return (Number(angle) * Math.PI) / 180
}
}

View File

@@ -0,0 +1,781 @@
/* eslint-disable */
// alignment pattern
var adelta = [
0, 11, 15, 19, 23, 27, 31,
16, 18, 20, 22, 24, 26, 28, 20, 22, 24, 24, 26, 28, 28, 22, 24, 24,
26, 26, 28, 28, 24, 24, 26, 26, 26, 28, 28, 24, 26, 26, 26, 28, 28
];
// version block
var vpat = [
0xc94, 0x5bc, 0xa99, 0x4d3, 0xbf6, 0x762, 0x847, 0x60d,
0x928, 0xb78, 0x45d, 0xa17, 0x532, 0x9a6, 0x683, 0x8c9,
0x7ec, 0xec4, 0x1e1, 0xfab, 0x08e, 0xc1a, 0x33f, 0xd75,
0x250, 0x9d5, 0x6f0, 0x8ba, 0x79f, 0xb0b, 0x42e, 0xa64,
0x541, 0xc69
];
// final format bits with mask: level << 3 | mask
var fmtword = [
0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976, //L
0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0, //M
0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed, //Q
0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b //H
];
// 4 per version: number of blocks 1,2; data width; ecc width
var eccblocks = [
1, 0, 19, 7, 1, 0, 16, 10, 1, 0, 13, 13, 1, 0, 9, 17,
1, 0, 34, 10, 1, 0, 28, 16, 1, 0, 22, 22, 1, 0, 16, 28,
1, 0, 55, 15, 1, 0, 44, 26, 2, 0, 17, 18, 2, 0, 13, 22,
1, 0, 80, 20, 2, 0, 32, 18, 2, 0, 24, 26, 4, 0, 9, 16,
1, 0, 108, 26, 2, 0, 43, 24, 2, 2, 15, 18, 2, 2, 11, 22,
2, 0, 68, 18, 4, 0, 27, 16, 4, 0, 19, 24, 4, 0, 15, 28,
2, 0, 78, 20, 4, 0, 31, 18, 2, 4, 14, 18, 4, 1, 13, 26,
2, 0, 97, 24, 2, 2, 38, 22, 4, 2, 18, 22, 4, 2, 14, 26,
2, 0, 116, 30, 3, 2, 36, 22, 4, 4, 16, 20, 4, 4, 12, 24,
2, 2, 68, 18, 4, 1, 43, 26, 6, 2, 19, 24, 6, 2, 15, 28,
4, 0, 81, 20, 1, 4, 50, 30, 4, 4, 22, 28, 3, 8, 12, 24,
2, 2, 92, 24, 6, 2, 36, 22, 4, 6, 20, 26, 7, 4, 14, 28,
4, 0, 107, 26, 8, 1, 37, 22, 8, 4, 20, 24, 12, 4, 11, 22,
3, 1, 115, 30, 4, 5, 40, 24, 11, 5, 16, 20, 11, 5, 12, 24,
5, 1, 87, 22, 5, 5, 41, 24, 5, 7, 24, 30, 11, 7, 12, 24,
5, 1, 98, 24, 7, 3, 45, 28, 15, 2, 19, 24, 3, 13, 15, 30,
1, 5, 107, 28, 10, 1, 46, 28, 1, 15, 22, 28, 2, 17, 14, 28,
5, 1, 120, 30, 9, 4, 43, 26, 17, 1, 22, 28, 2, 19, 14, 28,
3, 4, 113, 28, 3, 11, 44, 26, 17, 4, 21, 26, 9, 16, 13, 26,
3, 5, 107, 28, 3, 13, 41, 26, 15, 5, 24, 30, 15, 10, 15, 28,
4, 4, 116, 28, 17, 0, 42, 26, 17, 6, 22, 28, 19, 6, 16, 30,
2, 7, 111, 28, 17, 0, 46, 28, 7, 16, 24, 30, 34, 0, 13, 24,
4, 5, 121, 30, 4, 14, 47, 28, 11, 14, 24, 30, 16, 14, 15, 30,
6, 4, 117, 30, 6, 14, 45, 28, 11, 16, 24, 30, 30, 2, 16, 30,
8, 4, 106, 26, 8, 13, 47, 28, 7, 22, 24, 30, 22, 13, 15, 30,
10, 2, 114, 28, 19, 4, 46, 28, 28, 6, 22, 28, 33, 4, 16, 30,
8, 4, 122, 30, 22, 3, 45, 28, 8, 26, 23, 30, 12, 28, 15, 30,
3, 10, 117, 30, 3, 23, 45, 28, 4, 31, 24, 30, 11, 31, 15, 30,
7, 7, 116, 30, 21, 7, 45, 28, 1, 37, 23, 30, 19, 26, 15, 30,
5, 10, 115, 30, 19, 10, 47, 28, 15, 25, 24, 30, 23, 25, 15, 30,
13, 3, 115, 30, 2, 29, 46, 28, 42, 1, 24, 30, 23, 28, 15, 30,
17, 0, 115, 30, 10, 23, 46, 28, 10, 35, 24, 30, 19, 35, 15, 30,
17, 1, 115, 30, 14, 21, 46, 28, 29, 19, 24, 30, 11, 46, 15, 30,
13, 6, 115, 30, 14, 23, 46, 28, 44, 7, 24, 30, 59, 1, 16, 30,
12, 7, 121, 30, 12, 26, 47, 28, 39, 14, 24, 30, 22, 41, 15, 30,
6, 14, 121, 30, 6, 34, 47, 28, 46, 10, 24, 30, 2, 64, 15, 30,
17, 4, 122, 30, 29, 14, 46, 28, 49, 10, 24, 30, 24, 46, 15, 30,
4, 18, 122, 30, 13, 32, 46, 28, 48, 14, 24, 30, 42, 32, 15, 30,
20, 4, 117, 30, 40, 7, 47, 28, 43, 22, 24, 30, 10, 67, 15, 30,
19, 6, 118, 30, 18, 31, 47, 28, 34, 34, 24, 30, 20, 61, 15, 30
];
// Galois field log table
var glog = [
0xff, 0x00, 0x01, 0x19, 0x02, 0x32, 0x1a, 0xc6, 0x03, 0xdf, 0x33, 0xee, 0x1b, 0x68, 0xc7, 0x4b,
0x04, 0x64, 0xe0, 0x0e, 0x34, 0x8d, 0xef, 0x81, 0x1c, 0xc1, 0x69, 0xf8, 0xc8, 0x08, 0x4c, 0x71,
0x05, 0x8a, 0x65, 0x2f, 0xe1, 0x24, 0x0f, 0x21, 0x35, 0x93, 0x8e, 0xda, 0xf0, 0x12, 0x82, 0x45,
0x1d, 0xb5, 0xc2, 0x7d, 0x6a, 0x27, 0xf9, 0xb9, 0xc9, 0x9a, 0x09, 0x78, 0x4d, 0xe4, 0x72, 0xa6,
0x06, 0xbf, 0x8b, 0x62, 0x66, 0xdd, 0x30, 0xfd, 0xe2, 0x98, 0x25, 0xb3, 0x10, 0x91, 0x22, 0x88,
0x36, 0xd0, 0x94, 0xce, 0x8f, 0x96, 0xdb, 0xbd, 0xf1, 0xd2, 0x13, 0x5c, 0x83, 0x38, 0x46, 0x40,
0x1e, 0x42, 0xb6, 0xa3, 0xc3, 0x48, 0x7e, 0x6e, 0x6b, 0x3a, 0x28, 0x54, 0xfa, 0x85, 0xba, 0x3d,
0xca, 0x5e, 0x9b, 0x9f, 0x0a, 0x15, 0x79, 0x2b, 0x4e, 0xd4, 0xe5, 0xac, 0x73, 0xf3, 0xa7, 0x57,
0x07, 0x70, 0xc0, 0xf7, 0x8c, 0x80, 0x63, 0x0d, 0x67, 0x4a, 0xde, 0xed, 0x31, 0xc5, 0xfe, 0x18,
0xe3, 0xa5, 0x99, 0x77, 0x26, 0xb8, 0xb4, 0x7c, 0x11, 0x44, 0x92, 0xd9, 0x23, 0x20, 0x89, 0x2e,
0x37, 0x3f, 0xd1, 0x5b, 0x95, 0xbc, 0xcf, 0xcd, 0x90, 0x87, 0x97, 0xb2, 0xdc, 0xfc, 0xbe, 0x61,
0xf2, 0x56, 0xd3, 0xab, 0x14, 0x2a, 0x5d, 0x9e, 0x84, 0x3c, 0x39, 0x53, 0x47, 0x6d, 0x41, 0xa2,
0x1f, 0x2d, 0x43, 0xd8, 0xb7, 0x7b, 0xa4, 0x76, 0xc4, 0x17, 0x49, 0xec, 0x7f, 0x0c, 0x6f, 0xf6,
0x6c, 0xa1, 0x3b, 0x52, 0x29, 0x9d, 0x55, 0xaa, 0xfb, 0x60, 0x86, 0xb1, 0xbb, 0xcc, 0x3e, 0x5a,
0xcb, 0x59, 0x5f, 0xb0, 0x9c, 0xa9, 0xa0, 0x51, 0x0b, 0xf5, 0x16, 0xeb, 0x7a, 0x75, 0x2c, 0xd7,
0x4f, 0xae, 0xd5, 0xe9, 0xe6, 0xe7, 0xad, 0xe8, 0x74, 0xd6, 0xf4, 0xea, 0xa8, 0x50, 0x58, 0xaf
];
// Galios field exponent table
var gexp = [
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26,
0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9, 0x8f, 0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0,
0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35, 0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23,
0x46, 0x8c, 0x05, 0x0a, 0x14, 0x28, 0x50, 0xa0, 0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1,
0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc, 0x65, 0xca, 0x89, 0x0f, 0x1e, 0x3c, 0x78, 0xf0,
0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f, 0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2,
0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0x0d, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce,
0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93, 0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc,
0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9, 0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54,
0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa, 0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73,
0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e, 0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff,
0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4, 0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41,
0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x07, 0x0e, 0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6,
0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef, 0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x09,
0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5, 0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0x0b, 0x16,
0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83, 0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x00
];
// Working buffers:
// data input and ecc append, image working buffer, fixed part of image, run lengths for badness
var strinbuf = [], eccbuf = [], qrframe = [], framask = [], rlens = [];
// Control values - width is based on version, last 4 are from table.
var version, width, neccblk1, neccblk2, datablkw, eccblkwid;
var ecclevel = 2;
// set bit to indicate cell in qrframe is immutable. symmetric around diagonal
function setmask(x, y) {
var bt;
if (x > y) {
bt = x;
x = y;
y = bt;
}
// y*y = 1+3+5...
bt = y;
bt *= y;
bt += y;
bt >>= 1;
bt += x;
framask[bt] = 1;
}
// enter alignment pattern - black to qrframe, white to mask (later black frame merged to mask)
function putalign(x, y) {
var j;
qrframe[x + width * y] = 1;
for (j = -2; j < 2; j++) {
qrframe[(x + j) + width * (y - 2)] = 1;
qrframe[(x - 2) + width * (y + j + 1)] = 1;
qrframe[(x + 2) + width * (y + j)] = 1;
qrframe[(x + j + 1) + width * (y + 2)] = 1;
}
for (j = 0; j < 2; j++) {
setmask(x - 1, y + j);
setmask(x + 1, y - j);
setmask(x - j, y - 1);
setmask(x + j, y + 1);
}
}
//========================================================================
// Reed Solomon error correction
// exponentiation mod N
function modnn(x) {
while (x >= 255) {
x -= 255;
x = (x >> 8) + (x & 255);
}
return x;
}
var genpoly = [];
// Calculate and append ECC data to data block. Block is in strinbuf, indexes to buffers given.
function appendrs(data, dlen, ecbuf, eclen) {
var i, j, fb;
for (i = 0; i < eclen; i++)
strinbuf[ecbuf + i] = 0;
for (i = 0; i < dlen; i++) {
fb = glog[strinbuf[data + i] ^ strinbuf[ecbuf]];
if (fb != 255) /* fb term is non-zero */
for (j = 1; j < eclen; j++)
strinbuf[ecbuf + j - 1] = strinbuf[ecbuf + j] ^ gexp[modnn(fb + genpoly[eclen - j])];
else
for (j = ecbuf; j < ecbuf + eclen; j++)
strinbuf[j] = strinbuf[j + 1];
strinbuf[ecbuf + eclen - 1] = fb == 255 ? 0 : gexp[modnn(fb + genpoly[0])];
}
}
//========================================================================
// Frame data insert following the path rules
// check mask - since symmetrical use half.
function ismasked(x, y) {
var bt;
if (x > y) {
bt = x;
x = y;
y = bt;
}
bt = y;
bt += y * y;
bt >>= 1;
bt += x;
return framask[bt];
}
//========================================================================
// Apply the selected mask out of the 8.
function applymask(m) {
var x, y, r3x, r3y;
switch (m) {
case 0:
for (y = 0; y < width; y++)
for (x = 0; x < width; x++)
if (!((x + y) & 1) && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
break;
case 1:
for (y = 0; y < width; y++)
for (x = 0; x < width; x++)
if (!(y & 1) && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
break;
case 2:
for (y = 0; y < width; y++)
for (r3x = 0, x = 0; x < width; x++ , r3x++) {
if (r3x == 3)
r3x = 0;
if (!r3x && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
break;
case 3:
for (r3y = 0, y = 0; y < width; y++ , r3y++) {
if (r3y == 3)
r3y = 0;
for (r3x = r3y, x = 0; x < width; x++ , r3x++) {
if (r3x == 3)
r3x = 0;
if (!r3x && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
}
break;
case 4:
for (y = 0; y < width; y++)
for (r3x = 0, r3y = ((y >> 1) & 1), x = 0; x < width; x++ , r3x++) {
if (r3x == 3) {
r3x = 0;
r3y = !r3y;
}
if (!r3y && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
break;
case 5:
for (r3y = 0, y = 0; y < width; y++ , r3y++) {
if (r3y == 3)
r3y = 0;
for (r3x = 0, x = 0; x < width; x++ , r3x++) {
if (r3x == 3)
r3x = 0;
if (!((x & y & 1) + !(!r3x | !r3y)) && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
}
break;
case 6:
for (r3y = 0, y = 0; y < width; y++ , r3y++) {
if (r3y == 3)
r3y = 0;
for (r3x = 0, x = 0; x < width; x++ , r3x++) {
if (r3x == 3)
r3x = 0;
if (!(((x & y & 1) + (r3x && (r3x == r3y))) & 1) && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
}
break;
case 7:
for (r3y = 0, y = 0; y < width; y++ , r3y++) {
if (r3y == 3)
r3y = 0;
for (r3x = 0, x = 0; x < width; x++ , r3x++) {
if (r3x == 3)
r3x = 0;
if (!(((r3x && (r3x == r3y)) + ((x + y) & 1)) & 1) && !ismasked(x, y))
qrframe[x + y * width] ^= 1;
}
}
break;
}
return;
}
// Badness coefficients.
var N1 = 3, N2 = 3, N3 = 40, N4 = 10;
// Using the table of the length of each run, calculate the amount of bad image
// - long runs or those that look like finders; called twice, once each for X and Y
function badruns(length) {
var i;
var runsbad = 0;
for (i = 0; i <= length; i++)
if (rlens[i] >= 5)
runsbad += N1 + rlens[i] - 5;
// BwBBBwB as in finder
for (i = 3; i < length - 1; i += 2)
if (rlens[i - 2] == rlens[i + 2]
&& rlens[i + 2] == rlens[i - 1]
&& rlens[i - 1] == rlens[i + 1]
&& rlens[i - 1] * 3 == rlens[i]
// white around the black pattern? Not part of spec
&& (rlens[i - 3] == 0 // beginning
|| i + 3 > length // end
|| rlens[i - 3] * 3 >= rlens[i] * 4 || rlens[i + 3] * 3 >= rlens[i] * 4)
)
runsbad += N3;
return runsbad;
}
// Calculate how bad the masked image is - blocks, imbalance, runs, or finders.
function badcheck() {
var x, y, h, b, b1;
var thisbad = 0;
var bw = 0;
// blocks of same color.
for (y = 0; y < width - 1; y++)
for (x = 0; x < width - 1; x++)
if ((qrframe[x + width * y] && qrframe[(x + 1) + width * y]
&& qrframe[x + width * (y + 1)] && qrframe[(x + 1) + width * (y + 1)]) // all black
|| !(qrframe[x + width * y] || qrframe[(x + 1) + width * y]
|| qrframe[x + width * (y + 1)] || qrframe[(x + 1) + width * (y + 1)])) // all white
thisbad += N2;
// X runs
for (y = 0; y < width; y++) {
rlens[0] = 0;
for (h = b = x = 0; x < width; x++) {
if ((b1 = qrframe[x + width * y]) == b)
rlens[h]++;
else
rlens[++h] = 1;
b = b1;
bw += b ? 1 : -1;
}
thisbad += badruns(h);
}
// black/white imbalance
if (bw < 0)
bw = -bw;
var big = bw;
var count = 0;
big += big << 2;
big <<= 1;
while (big > width * width)
big -= width * width, count++;
thisbad += count * N4;
// Y runs
for (x = 0; x < width; x++) {
rlens[0] = 0;
for (h = b = y = 0; y < width; y++) {
if ((b1 = qrframe[x + width * y]) == b)
rlens[h]++;
else
rlens[++h] = 1;
b = b1;
}
thisbad += badruns(h);
}
return thisbad;
}
function genframe(instring) {
var x, y, k, t, v, i, j, m;
// find the smallest version that fits the string
t = instring.length;
version = 0;
do {
version++;
k = (ecclevel - 1) * 4 + (version - 1) * 16;
neccblk1 = eccblocks[k++];
neccblk2 = eccblocks[k++];
datablkw = eccblocks[k++];
eccblkwid = eccblocks[k];
k = datablkw * (neccblk1 + neccblk2) + neccblk2 - 3 + (version <= 9);
if (t <= k)
break;
} while (version < 40);
// FIXME - insure that it fits insted of being truncated
width = 17 + 4 * version;
// allocate, clear and setup data structures
v = datablkw + (datablkw + eccblkwid) * (neccblk1 + neccblk2) + neccblk2;
for (t = 0; t < v; t++)
eccbuf[t] = 0;
strinbuf = instring.slice(0);
for (t = 0; t < width * width; t++)
qrframe[t] = 0;
for (t = 0; t < (width * (width + 1) + 1) / 2; t++)
framask[t] = 0;
// insert finders - black to frame, white to mask
for (t = 0; t < 3; t++) {
k = 0;
y = 0;
if (t == 1)
k = (width - 7);
if (t == 2)
y = (width - 7);
qrframe[(y + 3) + width * (k + 3)] = 1;
for (x = 0; x < 6; x++) {
qrframe[(y + x) + width * k] = 1;
qrframe[y + width * (k + x + 1)] = 1;
qrframe[(y + 6) + width * (k + x)] = 1;
qrframe[(y + x + 1) + width * (k + 6)] = 1;
}
for (x = 1; x < 5; x++) {
setmask(y + x, k + 1);
setmask(y + 1, k + x + 1);
setmask(y + 5, k + x);
setmask(y + x + 1, k + 5);
}
for (x = 2; x < 4; x++) {
qrframe[(y + x) + width * (k + 2)] = 1;
qrframe[(y + 2) + width * (k + x + 1)] = 1;
qrframe[(y + 4) + width * (k + x)] = 1;
qrframe[(y + x + 1) + width * (k + 4)] = 1;
}
}
// alignment blocks
if (version > 1) {
t = adelta[version];
y = width - 7;
for (; ;) {
x = width - 7;
while (x > t - 3) {
putalign(x, y);
if (x < t)
break;
x -= t;
}
if (y <= t + 9)
break;
y -= t;
putalign(6, y);
putalign(y, 6);
}
}
// single black
qrframe[8 + width * (width - 8)] = 1;
// timing gap - mask only
for (y = 0; y < 7; y++) {
setmask(7, y);
setmask(width - 8, y);
setmask(7, y + width - 7);
}
for (x = 0; x < 8; x++) {
setmask(x, 7);
setmask(x + width - 8, 7);
setmask(x, width - 8);
}
// reserve mask-format area
for (x = 0; x < 9; x++)
setmask(x, 8);
for (x = 0; x < 8; x++) {
setmask(x + width - 8, 8);
setmask(8, x);
}
for (y = 0; y < 7; y++)
setmask(8, y + width - 7);
// timing row/col
for (x = 0; x < width - 14; x++)
if (x & 1) {
setmask(8 + x, 6);
setmask(6, 8 + x);
}
else {
qrframe[(8 + x) + width * 6] = 1;
qrframe[6 + width * (8 + x)] = 1;
}
// version block
if (version > 6) {
t = vpat[version - 7];
k = 17;
for (x = 0; x < 6; x++)
for (y = 0; y < 3; y++ , k--)
if (1 & (k > 11 ? version >> (k - 12) : t >> k)) {
qrframe[(5 - x) + width * (2 - y + width - 11)] = 1;
qrframe[(2 - y + width - 11) + width * (5 - x)] = 1;
}
else {
setmask(5 - x, 2 - y + width - 11);
setmask(2 - y + width - 11, 5 - x);
}
}
// sync mask bits - only set above for white spaces, so add in black bits
for (y = 0; y < width; y++)
for (x = 0; x <= y; x++)
if (qrframe[x + width * y])
setmask(x, y);
// convert string to bitstream
// 8 bit data to QR-coded 8 bit data (numeric or alphanum, or kanji not supported)
v = strinbuf.length;
// string to array
for (i = 0; i < v; i++)
eccbuf[i] = strinbuf.charCodeAt(i);
strinbuf = eccbuf.slice(0);
// calculate max string length
x = datablkw * (neccblk1 + neccblk2) + neccblk2;
if (v >= x - 2) {
v = x - 2;
if (version > 9)
v--;
}
// shift and repack to insert length prefix
i = v;
if (version > 9) {
strinbuf[i + 2] = 0;
strinbuf[i + 3] = 0;
while (i--) {
t = strinbuf[i];
strinbuf[i + 3] |= 255 & (t << 4);
strinbuf[i + 2] = t >> 4;
}
strinbuf[2] |= 255 & (v << 4);
strinbuf[1] = v >> 4;
strinbuf[0] = 0x40 | (v >> 12);
}
else {
strinbuf[i + 1] = 0;
strinbuf[i + 2] = 0;
while (i--) {
t = strinbuf[i];
strinbuf[i + 2] |= 255 & (t << 4);
strinbuf[i + 1] = t >> 4;
}
strinbuf[1] |= 255 & (v << 4);
strinbuf[0] = 0x40 | (v >> 4);
}
// fill to end with pad pattern
i = v + 3 - (version < 10);
while (i < x) {
strinbuf[i++] = 0xec;
// buffer has room if (i == x) break;
strinbuf[i++] = 0x11;
}
// calculate and append ECC
// calculate generator polynomial
genpoly[0] = 1;
for (i = 0; i < eccblkwid; i++) {
genpoly[i + 1] = 1;
for (j = i; j > 0; j--)
genpoly[j] = genpoly[j]
? genpoly[j - 1] ^ gexp[modnn(glog[genpoly[j]] + i)] : genpoly[j - 1];
genpoly[0] = gexp[modnn(glog[genpoly[0]] + i)];
}
for (i = 0; i <= eccblkwid; i++)
genpoly[i] = glog[genpoly[i]]; // use logs for genpoly[] to save calc step
// append ecc to data buffer
k = x;
y = 0;
for (i = 0; i < neccblk1; i++) {
appendrs(y, datablkw, k, eccblkwid);
y += datablkw;
k += eccblkwid;
}
for (i = 0; i < neccblk2; i++) {
appendrs(y, datablkw + 1, k, eccblkwid);
y += datablkw + 1;
k += eccblkwid;
}
// interleave blocks
y = 0;
for (i = 0; i < datablkw; i++) {
for (j = 0; j < neccblk1; j++)
eccbuf[y++] = strinbuf[i + j * datablkw];
for (j = 0; j < neccblk2; j++)
eccbuf[y++] = strinbuf[(neccblk1 * datablkw) + i + (j * (datablkw + 1))];
}
for (j = 0; j < neccblk2; j++)
eccbuf[y++] = strinbuf[(neccblk1 * datablkw) + i + (j * (datablkw + 1))];
for (i = 0; i < eccblkwid; i++)
for (j = 0; j < neccblk1 + neccblk2; j++)
eccbuf[y++] = strinbuf[x + i + j * eccblkwid];
strinbuf = eccbuf;
// pack bits into frame avoiding masked area.
x = y = width - 1;
k = v = 1; // up, minus
/* inteleaved data and ecc codes */
m = (datablkw + eccblkwid) * (neccblk1 + neccblk2) + neccblk2;
for (i = 0; i < m; i++) {
t = strinbuf[i];
for (j = 0; j < 8; j++ , t <<= 1) {
if (0x80 & t)
qrframe[x + width * y] = 1;
do { // find next fill position
if (v)
x--;
else {
x++;
if (k) {
if (y != 0)
y--;
else {
x -= 2;
k = !k;
if (x == 6) {
x--;
y = 9;
}
}
}
else {
if (y != width - 1)
y++;
else {
x -= 2;
k = !k;
if (x == 6) {
x--;
y -= 8;
}
}
}
}
v = !v;
} while (ismasked(x, y));
}
}
// save pre-mask copy of frame
strinbuf = qrframe.slice(0);
t = 0; // best
y = 30000; // demerit
// for instead of while since in original arduino code
// if an early mask was "good enough" it wouldn't try for a better one
// since they get more complex and take longer.
for (k = 0; k < 8; k++) {
applymask(k); // returns black-white imbalance
x = badcheck();
if (x < y) { // current mask better than previous best?
y = x;
t = k;
}
if (t == 7)
break; // don't increment i to a void redoing mask
qrframe = strinbuf.slice(0); // reset for next pass
}
if (t != k) // redo best mask - none good enough, last wasn't t
applymask(t);
// add in final mask/ecclevel bytes
y = fmtword[t + ((ecclevel - 1) << 3)];
// low byte
for (k = 0; k < 8; k++ , y >>= 1)
if (y & 1) {
qrframe[(width - 1 - k) + width * 8] = 1;
if (k < 6)
qrframe[8 + width * k] = 1;
else
qrframe[8 + width * (k + 1)] = 1;
}
// high byte
for (k = 0; k < 7; k++ , y >>= 1)
if (y & 1) {
qrframe[8 + width * (width - 7 + k)] = 1;
if (k)
qrframe[(6 - k) + width * 8] = 1;
else
qrframe[7 + width * 8] = 1;
}
return qrframe;
}
var _canvas = null;
export const api = {
get ecclevel() {
return ecclevel;
},
set ecclevel(val) {
ecclevel = val;
},
get size() {
return _size;
},
set size(val) {
_size = val
},
get canvas() {
return _canvas;
},
set canvas(el) {
_canvas = el;
},
getFrame: function (string) {
return genframe(string);
},
//这里的utf16to8(str)是对Text中的字符串进行转码让其支持中文
utf16to8: function (str) {
var out, i, len, c;
out = "";
len = str.length;
for (i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
},
/**
* 新增$this参数传入组件的this,兼容在组件中生成
* @param bg 目前只能设置颜色值
*/
draw: function (str, ctx, startX, startY, cavW, cavH, bg, color, $this, ecc) {
var that = this;
ecclevel = ecc || ecclevel;
if (!ctx) {
console.warn('No canvas provided to draw QR code in!')
return;
}
var size = Math.min(cavW, cavH);
str = that.utf16to8(str);//增加中文显示
var frame = that.getFrame(str);
var px = size / width;
if (bg) {
ctx.fillStyle = bg
ctx.fillRect(startX, startY, cavW, cavW);
}
ctx.fillStyle = color || 'black'
for (var i = 0; i < width; i++) {
for (var j = 0; j < width; j++) {
if (frame[j * width + i]) {
ctx.fillRect(startX + px * i, startY + px * j, px, px);
}
}
}
}
}

View File

@@ -0,0 +1,60 @@
const isValidUrl = url => {
return /(ht|f)tp(s?):\/\/([^ \\/]*\.)+[^ \\/]*(:[0-9]+)?\/?/.test(url)
}
/**
* 深度对比两个对象是否一致
* from: https://github.com/epoberezkin/fast-deep-equal
* @param {Object} a 对象a
* @param {Object} b 对象b
* @return {Boolean} 是否相同
*/
/* eslint-disable */
const equal = (a, b) => {
if (a === b) return true
if (a && b && typeof a == 'object' && typeof b == 'object') {
var arrA = Array.isArray(a),
arrB = Array.isArray(b),
i,
length,
key
if (arrA && arrB) {
length = a.length
if (length != b.length) return false
for (i = length; i-- !== 0; ) if (!equal(a[i], b[i])) return false
return true
}
if (arrA != arrB) return false
var dateA = a instanceof Date,
dateB = b instanceof Date
if (dateA != dateB) return false
if (dateA && dateB) return a.getTime() == b.getTime()
var regexpA = a instanceof RegExp,
regexpB = b instanceof RegExp
if (regexpA != regexpB) return false
if (regexpA && regexpB) return a.toString() == b.toString()
var keys = Object.keys(a)
length = keys.length
if (length !== Object.keys(b).length) return false
for (i = length; i-- !== 0; ) if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false
for (i = length; i-- !== 0; ) {
key = keys[i]
if (!equal(a[key], b[key])) return false
}
return true
}
return a !== a && b !== b
}
export { isValidUrl, equal }

View File

@@ -232,7 +232,7 @@
start_at : this.datePickerValue[0], start_at : this.datePickerValue[0],
end_at : this.datePickerValue[1], end_at : this.datePickerValue[1],
description : this.description, description : this.description,
time_type : this.times[this.typeIndex].type, time_type : this.times[this.timeIndex].type,
days : this.timeNumber, days : this.timeNumber,
goodsable_ids : this.coupongoods goodsable_ids : this.coupongoods
} }

View File

@@ -21,8 +21,6 @@
</view> </view>
</view> </view>
</view> </view>
<canvas class="codeImg" canvas-id="qrcodeCard"></canvas> <canvas class="codeImg" canvas-id="qrcodeCard"></canvas>
</view> </view>
</template> </template>
@@ -56,7 +54,7 @@
} }
}) })
}) })
// 下载二维码 // 下载二维码
let codeImg = new Promise(success => { let codeImg = new Promise(success => {
uni.getImageInfo({ uni.getImageInfo({
@@ -68,6 +66,8 @@
}) })
Promise.all([avatarImg, codeImg]).then(res => { Promise.all([avatarImg, codeImg]).then(res => {
console.log(res[0],'0')
console.log(res[1],'1')
// 绘制海报 // 绘制海报
const ctx = uni.createCanvasContext('qrcodeCard') const ctx = uni.createCanvasContext('qrcodeCard')
ctx.save() ctx.save()

File diff suppressed because one or more lines are too long