Files
orca/mobile/src/session/mobile-markdown-reader-status.ts
T
Jinwoo Hong fe34acda3b fix(mobile): truncate oversize markdown reads instead of failing them (#23676)
* fix(mobile): truncate oversize markdown reads instead of failing them

The desktop bridge refused markdown over a private 512 KiB cap with
file_too_large, which reached the phone as a generic runtime_error that
the reader discarded, so a 632 KB file showed "Couldn't load markdown".
Reads now return a UTF-8-boundary prefix under one shared 2 MiB budget,
marked truncated with the full byteLength and read-only. The phone shows
the truncation like file tabs do and maps refusal codes to real copy, so
an older desktop's refusal reads "File too large for mobile preview".

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* test(mobile): pin that a truncated markdown read is never editable

The read budget sits above the edit budget, so every truncated document is
already read-only as file_too_large. Pin that ordering so a future budget
change cannot make a prefix editable, and name the constant as the markdown
preview budget, separate from the file preview's own.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* test(mobile): refuse saves from a truncated markdown read

A phone holding a truncated prefix must not write it back; the 256 KiB
save guard refuses it as file_too_large before any version check. The
shared budget test shrinks to the ordering it pins and names the bridge
test as the behavioural pin.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* refactor(mobile): tighten markdown truncation types and measure once

The read truncation measures the document once. The disk fallback drops
its truncated-only read-only text, which the status line never showed,
and both truncation fields are optional there. A markdown doc's flag is
only ever true, and the schema comment names the hook, not line numbers.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* docs(mobile): drop a stale disk-fallback comment

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

* chore: retrigger CI after #23675 landed on main

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb
2026-09-28 16:58:15 -04:00

21 lines
701 B
TypeScript

import { formatPreviewByteLength } from '../files/mobile-file-preview-response'
import type { MarkdownDocState } from './mobile-session-route-types'
/** The markdown floating bar's status line; a truncated preview reads like a file tab's note. */
export function markdownReaderStatusText(
doc: Extract<MarkdownDocState, { status: 'ready' }>
): string | null {
if (doc.saveError) {
return doc.saveError
}
if (doc.truncated) {
return doc.byteLength === undefined
? 'Preview truncated.'
: `Preview truncated. File size: ${formatPreviewByteLength(doc.byteLength)}.`
}
if (doc.readOnlyReason) {
return 'Read only'
}
return doc.stale ? 'Changed on desktop' : null
}