eno/lib/react.tsx

132 lines
3.0 KiB
TypeScript

import * as ReactParts from "react-original";
const H = ReactParts.createElement;
const HMR = {
registered: new Map(),
states: new Map(),
statesOld: new Map(),
reloads: 0,
wireframe: false
};
HMR.onChange =(key, value)=>
{
HMR.registered.set(key, value);
};
HMR.update =()=>
{
HMR.reloads++;
const keys = [];
for(const [key, value] of HMR.registered){ keys.push(key); }
HMR.registered.clear();
HMR.statesOld = HMR.states;
HMR.states = new Map();
keys.forEach(k=>k());
HMR.echoState();
};
HMR.echoState =()=>
{
let output = [];
for(const[key, val] of HMR.statesOld)
{
output[key] = val.state+"--"+val.reload;
}
console.log(output);
output = [];
for(const[key, val] of HMR.states)
{
output[key] = val.state+"--"+val.reload;
}
console.log(output);
};
HMR.wipe =()=>
{
HMR.statesOld = new Map();
};
const MapAt =(inMap, inIndex)=>
{
let index = 0;
for(const kvp of inMap)
{
if(index == inIndex)
{
return kvp;
}
index++;
}
return false;
}
window.HMR = HMR;
const ProxyElement = (props)=>
{
const [stateGet, stateSet] = ReactParts.useState(0);
ReactParts.useEffect(()=>HMR.onChange( ()=>stateSet(stateGet+1), "ProxyElement" ));
const child = H(...props.__args);
if(HMR.wireframe)
{
return H("div", {style:{padding:"10px", border:"2px solid red"}},
H("p", null, stateGet),
child
);
}
else
{
return child;
}
};
const ProxyCreate =(...args)=>
{
return typeof args[0] != "string" ? H(ProxyElement, {__args:args, ...args[1]}) : H(...args);
};
const ProxyState =(arg)=>
{
const id = ReactParts.useId();
const trueArg = arg;
// does statesOld have an entry for this state? use that instead of the passed arg
const check = MapAt(HMR.statesOld, HMR.states.size);
if(check)
{
arg = check[1].state;
console.info(`BOOTING with ${arg}`);
}
const lastKnowReloads = HMR.reloads;
const [stateGet, stateSet] = ReactParts.useState(arg);
ReactParts.useEffect(()=>{
return ()=>{
if(HMR.reloads == lastKnowReloads)
{
// this is a switch/ui change, not a HMR reload change
const oldState = MapAt(HMR.statesOld, HMR.states.size-1);
HMR.statesOld.set(oldState[0], {...oldState[1], state:trueArg});
}
HMR.states.delete(id);
}
}, []);
if(!HMR.states.has(id))
{
HMR.states.set(id, {state:arg, set:stateSet, reload:HMR.reloads});
}
function proxySetter (arg)
{
//console.log("state spy update", id, arg);
HMR.states.set(id, {state:arg, set:stateSet, reload:HMR.reloads});
return stateSet(arg);
}
return [stateGet, proxySetter];
};
export * from "react-original";
export { ProxyCreate as createElement, ProxyState as useState };
export default {...ReactParts.default, createElement:ProxyCreate, useState:ProxyState};