Zayden-Jung/Endoleap
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Decode duplicate payloads on demand from indexed snapshots

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Codex Bot
2026-11-08 20:28:09 +08:00
parent b5ad3e0cc9
commit 4035956607
11 changed files with 146 additions and 31 deletions
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src/lib/canvas-runtime/duplicate-source.ts
+4 -3
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@@ -8,10 +8,10 @@ import { duplicateImportLine } from './import-duplicate.ts';
import type { ImportSource } from './imports.ts';
/** A seekable record cursor over the original SHA-bound snapshot, not a second mapped Blob. */
export function createDuplicatePlanSource(document:Document,registry:Registry,state:DuplicateCheckpoint,fingerprint:string):ImportSource{
export function createDuplicatePlanSource(document:Document,registry:Registry,state:DuplicateCheckpoint,fingerprint:string,readElement?:(id:Id,signal:AbortSignal)=>Promise<ElementRecord>):ImportSource{
if(state.phase!=='emit'||state.emitted!==0||state.emittedEdges!==0||state.schemaToken!==copyRegistrySignature(document,registry))throw fault('copy_interpreter_changed');
// Structural/source binding checks; the decoded source has already passed document validation.
createDuplicatePlanner(document,registry,state.selection,{createId:()=>{throw fault('unstable_import_identity');},worldOffset:state.offset,...(state.mapping?{mapping:state.mapping}:{})},{sourceToken:state.sourceToken,schemaToken:state.schemaToken,checkpoint:state});
createDuplicatePlanner(document,registry,state.selection,{createId:()=>{throw fault('unstable_import_identity');},worldOffset:state.offset,...(state.mapping?{mapping:state.mapping}:{})},{sourceToken:state.sourceToken,schemaToken:state.schemaToken,checkpoint:state,topologyOnly:!!readElement});
const elements=new Map(state.elementIds),canvases=new Map(state.canvasIds),copiedCanvases=new Set(state.canvases),keys=new Map<Id,string>(),reverseElements=new Map(state.elementIds.map(([id,mapped])=>[mapped,id])),reverseCanvases=new Map(state.canvasIds.map(([id,mapped])=>[mapped,id]));
for(const[id,mapped]of elements)keys.set(mapped,`element:${id}`);for(const[id,mapped]of canvases)keys.set(mapped,`canvas:${id}`);
// Edge geometry needs mapped endpoint/owner records. Compute these on demand; retain a bounded cache.
@@ -24,7 +24,8 @@ export function createDuplicatePlanSource(document:Document,registry:Registry,st
return Object.freeze({fingerprint,parserVersion:2,async read(cursor:number,signal:AbortSignal){
if(signal.aborted)throw fault('import_aborted');if(!Number.isSafeInteger(cursor)||cursor<0||cursor>length)throw fault('invalid_import_cursor');if(cursor===length)return null;
const task=state.order[cursor],key=task?`${task.kind}:${task.id}`:`element:${state.edges[cursor-state.order.length]}`;
try{const change=cursor<state.order.length?duplicateTreeChange(document,registry,task.kind,(task.kind==='element'?document.elements:document.canvases).get(task.id)!,elements,canvases,copiedCanvases,state.offset):duplicateEdgeChange(document,registry,document.elements.get(state.edges[cursor-state.order.length])!,elements,canvases,projected),line=duplicateImportLine(document,registry,change,keys);
try{const original=task?.kind==='canvas'?document.canvases.get(task.id)!:readElement?await readElement(task?.id??state.edges[cursor-state.order.length],signal):document.elements.get(task?.id??state.edges[cursor-state.order.length])!;
if(signal.aborted)throw fault('import_aborted');const change=cursor<state.order.length?duplicateTreeChange(document,registry,task.kind,original,elements,canvases,copiedCanvases,state.offset):duplicateEdgeChange(document,registry,original as ElementRecord,elements,canvases,projected),line=duplicateImportLine(document,registry,change,keys);
if(new TextEncoder().encode(JSON.stringify(line)).byteLength>256*1024)throw fault('record_too_large');
return{cursor,nextCursor:cursor+1,key:line.key,value:line as unknown as Json};}catch(error){return{cursor,nextCursor:cursor+1,key,error:(error as {code?:string}).code??'copy_record_failed'};}
}});