relation.js
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const styles = (v ='') => v.split(';').filter(v => v && !/^[\n\s]+$/.test(v)).map(v => {
const key = v.slice(0, v.indexOf(':'))
const value = v.slice(v.indexOf(':')+1)
return {
[key
.replace(/-([a-z])/g, function() { return arguments[1].toUpperCase()})
.replace(/\s+/g, '')
]: value.replace(/^\s+/, '').replace(/\s+$/, '') || ''
}
})
export function parent(parent) {
return {
provide() {
return {
[parent]: this
}
},
data() {
return {
el: {
id: null,
css: {},
views: []
},
}
},
watch: {
css: {
handler(v) {
if(this.canvasId) {
this.el.css = (typeof v == 'object' ? v : v && Object.assign(...styles(v))) || {}
this.canvasWidth = this.el.css && this.el.css.width || this.canvasWidth
this.canvasHeight = this.el.css && this.el.css.height || this.canvasHeight
}
},
immediate: true
}
}
}
}
export function children(parent, options = {}) {
const indexKey = options.indexKey || 'index'
return {
inject: {
[parent]: {
default: null
}
},
watch: {
el: {
handler(v, o) {
if(JSON.stringify(v) != JSON.stringify(o))
this.bindRelation()
},
deep: true,
immediate: true
},
src: {
handler(v, o) {
if(v != o)
this.bindRelation()
},
immediate: true
},
text: {
handler(v, o) {
if(v != o) this.bindRelation()
},
immediate: true
},
css: {
handler(v, o) {
if(v != o)
this.el.css = (typeof v == 'object' ? v : v && Object.assign(...styles(v))) || {}
},
immediate: true
},
replace: {
handler(v, o) {
if(JSON.stringify(v) != JSON.stringify(o))
this.bindRelation()
},
deep: true,
immediate: true
}
},
created() {
if(!this._uid) {
this._uid = this._.uid
}
Object.defineProperty(this, 'parent', {
get: () => this[parent] || [],
})
Object.defineProperty(this, 'index', {
get: () => {
this.bindRelation();
const {parent: {el: {views=[]}={}}={}} = this
return views.indexOf(this.el)
},
});
this.el.type = this.type
if(this.uid) {
this.el.uid = this.uid
}
this.bindRelation()
},
// #ifdef VUE3
beforeUnmount() {
this.removeEl()
},
// #endif
// #ifdef VUE2
beforeDestroy() {
this.removeEl()
},
// #endif
methods: {
removeEl() {
if (this.parent) {
this.parent.el.views = this.parent.el.views.filter(
(item) => item._uid !== this._uid
);
}
},
bindRelation() {
if(!this.el._uid) {
this.el._uid = this._uid
}
if(['text','qrcode'].includes(this.type)) {
this.el.text = this.$slots && this.$slots.default && this.$slots.default[0].text || `${this.text || ''}`.replace(/\\n/g, '\n')
}
if(this.type == 'image') {
this.el.src = this.src
}
if (!this.parent) {
return;
}
let views = this.parent.el.views || [];
if(views.indexOf(this.el) !== -1) {
this.parent.el.views = views.map(v => v._uid == this._uid ? this.el : v)
} else {
this.parent.el.views = [...views, this.el];
}
}
},
mounted() {
// this.bindRelation()
},
}
}