myxeliumandCursor
bb0ac930ad
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Stream large receives to disk with chunk acks to cap renderer RAM, evict off-screen display blobs, and route exports through a disk-aware download service. Fix the high-memory dialog (backdrop dismiss, copy, log actions), allow diagnostics paths in the path jail, and restore persisted image hydration after reload. Co-authored-by: Cursor <cursoragent@cursor.com>
45 lines
1.6 KiB
TypeScript
45 lines
1.6 KiB
TypeScript
/** Chunk size used when rebuilding attachment blobs from disk without blocking the UI thread. */
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export const ATTACHMENT_BLOB_READ_CHUNK_SIZE_BYTES = 256 * 1024;
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/** Number of bytes encoded per chunk to keep base64 encoding off the call stack. */
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const BASE64_ENCODE_CHUNK_SIZE = 0x8000;
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/** Decode a base64 payload into bytes for Blob construction. */
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export function decodeBase64ToUint8Array(base64: string): Uint8Array {
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const binary = atob(base64);
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const bytes = new Uint8Array(binary.length);
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for (let index = 0; index < binary.length; index++) {
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bytes[index] = binary.charCodeAt(index);
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}
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return bytes;
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}
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/** Encode bytes into a base64 payload, chunked so large buffers cannot overflow the call stack. */
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export function encodeUint8ArrayToBase64(bytes: Uint8Array): string {
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let binary = '';
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for (let offset = 0; offset < bytes.length; offset += BASE64_ENCODE_CHUNK_SIZE) {
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const chunk = bytes.subarray(offset, offset + BASE64_ENCODE_CHUNK_SIZE);
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binary += String.fromCharCode(...chunk);
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}
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return btoa(binary);
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}
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/** Returns the decoded byte length of a base64 payload without allocating the bytes. */
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export function base64DecodedByteLength(base64: string): number {
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const padding = base64.endsWith('==') ? 2 : base64.endsWith('=') ? 1 : 0;
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return Math.max(0, Math.floor((base64.length * 3) / 4) - padding);
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}
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/** Yield control back to the browser so long attachment hydration cannot freeze Electron. */
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export function yieldToAttachmentHydrationLoop(): Promise<void> {
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return new Promise((resolve) => {
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setTimeout(resolve, 0);
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});
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}
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