52 lines
2.3 KiB
JavaScript
52 lines
2.3 KiB
JavaScript
(function(root,factory){
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const api=factory();
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if(typeof module==='object'&&module.exports)module.exports=api;
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root.BendInteractionState=api;
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})(typeof globalThis!=='undefined'?globalThis:this,function(){
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'use strict';
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const DEFAULT_SCOPES=Object.freeze({
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any:Object.freeze(['camera','drawing','claim','wheel','reaction','minimap','dialog']),
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pointer:Object.freeze(['camera','drawing','claim','reaction','minimap']),
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camera:Object.freeze(['camera','wheel']),
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persistence:Object.freeze(['camera','drawing','claim','wheel','reaction','minimap']),
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world:Object.freeze(['camera','drawing','claim','wheel','reaction','minimap']),
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overview:Object.freeze(['camera','drawing','claim','wheel','reaction','minimap']),
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worker:Object.freeze(['drawing','claim'])
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});
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function createInteractionState(scopeDefinitions=DEFAULT_SCOPES){
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const owners=new Map(),listeners=new Set(),scopes=new Map(
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Object.entries(scopeDefinitions).map(([name,kinds])=>[name,new Set(kinds)])
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);
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let revision=0;
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const snapshot=()=>Object.freeze({
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revision,
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activeKinds:Object.freeze([...owners.keys()]),
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owners:Object.freeze(Object.fromEntries(owners))
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});
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const notify=()=>{const state=snapshot();for(const listener of listeners)listener(state)};
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const set=(kind,owner)=>{
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const key=String(kind||'');if(!key)throw new TypeError('Interaction kind is required');
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const next=owner==null||owner===false?null:String(owner),previous=owners.get(key)||null;
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if(previous===next)return false;
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if(next==null)owners.delete(key);else owners.set(key,next);
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revision++;notify();return true;
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};
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const active=(scope='any')=>{
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const kinds=scopes.get(scope);if(!kinds)throw new TypeError(`Unknown interaction scope: ${scope}`);
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for(const kind of kinds)if(owners.has(kind))return true;
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return false;
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};
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return Object.freeze({
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set,
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clear:kind=>set(kind,null),
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owner:kind=>owners.get(String(kind||''))||null,
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active,
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snapshot,
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subscribe(listener){if(typeof listener!=='function')throw new TypeError('Listener must be a function');listeners.add(listener);return()=>listeners.delete(listener)}
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});
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}
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return Object.freeze({DEFAULT_SCOPES,createInteractionState});
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});
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