xrsh-com/com/dom.js

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/*
* ## dom
*
* instances reactive DOM component from AFRAME component's `dom` metadata
*
* ```html
* <script>
* AFRAME.registerComponent('mycom',{
* init: function(){ this.data.foo = 1 },
* dom: {
* scale: 3,
* events: ['click'],
* html: (me) => `<div id="iconmenu">${me.data.foo}</div>`,
* css: (me) => `#iconmenu { display:block }`
* },
* event: {
* click: (e) => alert(e),
* foo: (e) => alert("I was updated!")
* }
* })
* </script>
*
* <a-entity mycom dom/>
* ```
*
* | property | type | example |
* |--------------|--------------------|----------------------------------------------------------------------------------------|
* | `com` | `array` of strings | <a-entity app="app/launcher.js; registers: https://foo.com/index.json, ./index.json"/> |
*
* | event | target | info |
* |--------------|-------------------------------------------------------------------------------------------------------------|
* | `DOMready` | self | fired when dom component (`this.dom`) is created |
*/
AFRAME.registerComponent('dom',{
init: function(){
Object.values(this.el.components)
.map( (c) => {
if( c.dom && c.attrName != "dom"){
this.dom = c.dom
this.com = c
}
})
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if( !this.dom || !this.com){
return console.warn('dom.js did not find a .dom object inside component')
}
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this
.ensureOverlay()
.addCSS()
.createReactiveDOMElement()
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.assignUniqueID()
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.scaleDOMvsXR()
.triggerKeyboardForInputs()
document.querySelector('#overlay').appendChild(this.el.dom)
this.el.emit('DOMready',{el: this.el.dom})
},
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ensureOverlay: function(){
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// ensure overlay
let overlay = document.querySelector('#overlay')
if( !overlay ){
overlay = document.createElement('div')
overlay.id = "overlay"
document.body.appendChild(overlay)
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// sceneEl.setAttribute("webxr","overlayElement:#overlay")
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}
return this
},
reactify: function(el,data){
return new Proxy(data, {
get(me,k,v) {
return me[k]
},
set(me,k,v){
me[k] = v
el.emit(k,{el,k,v})
}
})
},
// creates el.dom (the 2D DOM object)
createReactiveDOMElement: function(){
this.el.dom = document.createElement('div')
this.el.dom.innerHTML = this.dom.html(this)
this.el.dom.className = this.dom.attrName
this.com.data = this.reactify( this.el, this.com.data )
if( this.dom.events ) this.dom.events.map( (e) => this.el.dom.addEventListener(e, (ev) => this.el.emit(e,ev) ) )
this.el.dom = this.el.dom.children[0]
return this
},
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assignUniqueID: function(){
// assign unique app id so it's easy to reference (by html-mesh component e.g.)
if( !this.el.uid ) this.el.uid = '_'+String(Math.random()).substr(10)
return this
},
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addCSS: function(){
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if( this.dom.css && !document.head.querySelector(`style#${this.com.attrName}`) ){
document.head.innerHTML += `<style id="${this.com.attrName}">${this.dom.css(this)}</style>`
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}
return this
},
scaleDOMvsXR: function(){
if( this.dom.scale ) this.el.setAttribute('scale',`${this.dom.scale} ${this.dom.scale} ${this.dom.scale}`)
return this
},
triggerKeyboardForInputs: function(){
// https://developer.oculus.com/documentation/web/webxr-keyboard ;
[...this.el.dom.querySelectorAll('[type=text]')].map( (input) => {
let triggerKeyboard = function(){
this.focus()
console.log("focus")
}
input.addEventListener('click', triggerKeyboard )
})
return this
}
})