When the render would inject the page title as an h1 (markdown.has_h1 is
False for the body), an article job's text carries the same '# {title}'
line: the title translates in document context and the opening paragraphs
see the heading (works both ways). The heading's pair in the decomposed
result becomes the title fragment — heading text only, pure prose, never
stored as a body chunk; a demoted or merged heading skips the title,
which stays pending for a scoped title job. The job covers the title key
so it is not double-dispatched afterwards.
Prompt: prefer established technical loanwords with English roots over
forced localizations (frontend -> frontti in Finnish, not etupääte).
Verified offline (title extraction, demoted-heading skip, no-injection
path) and live against ollama qwen3.8:27b: the standalone title job gave
'Alkuun pääseminen', the article job then overwrote it with the
in-context 'Aloitus' matching the body's translated heading.
579 lines
32 KiB
Markdown
579 lines
32 KiB
Markdown
# Localization
|
||
|
||
Pages are served in the visitor's language based on a `?lang=` query
|
||
parameter or the `Accept-Language` header.
|
||
|
||
- **Phase 1 (implemented):** negotiation, URL scheme, caching, rendering
|
||
plumbing. Translations are consumed through a stub interface; the database
|
||
still holds only the original language.
|
||
- **Phase 2 (implemented):** gettext-style fragment storage in the
|
||
database — machine-translated chunks plus user override patches, assembled
|
||
at render time. Storage details in `docs/migrate.md`.
|
||
|
||
## Phase 1: negotiation and URLs
|
||
|
||
### The primary language
|
||
|
||
Each article has a primary (original) language: `Node.language`, inherited
|
||
down the tree like `banner` — "" = the nearest ancestor's, the front page
|
||
last (it doubles as the site default), with `en` as the final fallback
|
||
(`ORIGINAL_LANGUAGE`, `primary_lang()` in `pagerite/i18n.py`). It is
|
||
configured per row in the structure editor. Everything per-article keys
|
||
off the resolved value: language selection, `<html lang>`, canonical URLs,
|
||
what counts as a translation, and the translation targets (a node's own
|
||
primary is never one — so the target set may include the site default, and
|
||
a page in another language can be translated into it).
|
||
|
||
### Language selection
|
||
|
||
Deliberately simple — **q-values are ignored**:
|
||
|
||
- All known `Accept-Language` implementations send the header **in order of
|
||
preference**, so we parse it as an ordered list and never reorder.
|
||
- Selection rule (`select_language` in `pagerite/i18n.py`):
|
||
1. If `?lang=<tag>` is present, use it (if a translation exists; otherwise
|
||
fall through to header logic).
|
||
2. Otherwise walk the header list in order and use the first language that
|
||
can be served — the original, or one with an available translation.
|
||
3. Fall back to the original.
|
||
|
||
Region tags normalize to their base subtag (`fi-FI` → `fi`).
|
||
|
||
### URLs: pretty for users, indexable for search engines
|
||
|
||
- Canonical URLs stay pretty (`/some-page`). Each language version is
|
||
addressable as `/some-page?lang=fi` so search engines can index them.
|
||
- `<link rel="canonical">` names the **actually served language**: the plain
|
||
URL when serving the original (for SEO the non-query URL means the
|
||
article's own language), `?lang=xx` when serving a translation — however
|
||
the language was arrived at (query or header).
|
||
- `<link rel="alternate" hreflang="…">` entries follow the canonical
|
||
directly (before the social meta tags) and list the languages the page
|
||
is **actually available in**: `x-default` first, pointing at the plain
|
||
autodetecting URL, then every available language — the original again by
|
||
its plain URL, translations by `?lang=`. The public language selector
|
||
keys off these: pagerite.js mounts the editors' flag dropdown in the
|
||
top-right corner when the head advertises x-default plus more than one
|
||
language, loading its bundle (Vue + the flag SVG set) on demand.
|
||
- The override sticks for the session of clicks: a page requested with
|
||
`?lang=` replicates the query onto the navigation links it renders (nav,
|
||
sidebar, cards, brand — in-article links are content and stay as
|
||
authored), so plain clicks and no-JS navigation keep the language.
|
||
pagerite.js additionally strips the query from the address bar via
|
||
`history.replaceState` (pretty, shareable URLs), remembers the language,
|
||
and adds it to every internal fetch that lacks one (preloads,
|
||
fetch-navigations, history traversals); history entries stay query-less.
|
||
- The public selector's pick is the same override, pure JS state
|
||
(`pagerite:set-session-lang`): the session language changes and the page
|
||
swaps in place — no `?lang=` in the address bar, no reload. The choice is
|
||
linked with the editor panel's language dropdown both ways; closing the
|
||
panel keeps the chosen language instead of reverting.
|
||
- A full page refresh or a shared link resets to automatic selection (header
|
||
only). This gives a clean one-time override without cookies.
|
||
|
||
### Response correctness
|
||
|
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- Content responses carry `Vary: accept-language` (added to the existing
|
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`accept-encoding` vary).
|
||
- `_cached_body` and the page ETag include the **selected language** (not the
|
||
raw header, which would blow up the cache key space) and the **replicated
|
||
link language**: a `?lang=fi` render and a header-selected Finnish render
|
||
of the same page differ in their navigation links, so they are cached as
|
||
separate variants.
|
||
- `<html lang="…">` reflects the served language, and an RTL language
|
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(`i18n.RTL_LANGUAGES` — ar, fa, he, ur) also sets `dir="rtl"` on `<html>`
|
||
(the editor panel carries its own `lang="en" dir="ltr"` so it stays LTR).
|
||
Client-side page swaps (fetch navigation in pagerite.js, editor re-renders
|
||
in swapdoc.js) copy both attributes from the fetched document, so a hot
|
||
switch into or out of an RTL page flips the layout without a reload.
|
||
|
||
### Rendering
|
||
|
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- The translated Markdown goes through the same `markdown.render` pipeline.
|
||
- Section anchors (`#hash` ids on h1/h2 headings) stay in the original
|
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language: render(anchors_from=...) pins the translated render's heading
|
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ids to the original text's slugs, matched by heading position, so links
|
||
to sections don't break across languages.
|
||
- Navigation/sidebar titles come from the translation's title map, with
|
||
per-node fallback to the original title (a partially translated tree must
|
||
still render).
|
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- Category placeholder pages (the 404s for content-less labels) select a
|
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language like content pages, but over the **subtree's** combined
|
||
availability (`subtree_languages`) — they have no chunks of their own;
|
||
the heading, navigation and card text localize from the title map and
|
||
the target articles' translations. Their hreflang alternates are
|
||
computed exactly like a content page's (a translated title counts as
|
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availability, so the language selector is offered there too).
|
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- Card descriptions and cover picks run on the target article's hybrid
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Markdown where that page is available in the served language, with
|
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per-card fallback to the original.
|
||
- Fixed UI strings ("Not Found" etc.) and the editor UI stay English for now.
|
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- The markdown typographer (SmartyPants) is English-centric; per-language
|
||
typographer options are a possible follow-up, not blocking.
|
||
|
||
## Phase 2: fragment-based translation storage (implemented)
|
||
|
||
Phase 1 assumed whole-page translated Markdown delivered from outside. The
|
||
refined model is gettext-style: an article has **one primary version** (its
|
||
`content`, in its own language) plus, per target language, **machine
|
||
fragments** (translated chunks of Markdown) and **user patches** (minimal
|
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editor overrides). Both are stored in the database and assembled into the
|
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served Markdown at render time.
|
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|
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### The scenario this must handle
|
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|
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1. Article written in English.
|
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2. Machine-translated into Spanish → fragments stored.
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3. Editor fixes one Spanish paragraph and changes a link elsewhere to point
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at a Spanish resource → user patch hunks stored.
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4. English article edited → the edited chunk's key changes; its Spanish
|
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fragment no longer matches.
|
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5. Page requested before the machine translation refreshes → served as a
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**hybrid**: old fragments for unchanged chunks, plain English for the
|
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edited chunk. User patches are attempted against this hybrid, best effort,
|
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each hunk independently: the text fix is stale (its search text no longer
|
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exists) and silently skipped; the link change still applies even though
|
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the link sits in the now-English paragraph.
|
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6. Machine translation refreshes → full Spanish again, with both patch hunks
|
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applying.
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|
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### Chunks
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`chunk_markdown(markdown)` splits the source into block-level chunks —
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blank-line-separated blocks: headings, paragraphs, code fences (kept whole),
|
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list blocks, tables, HTML blocks. Container fence lines (`::: name` openers
|
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and `:::` closers) are always their own chunk, blank lines or not — folded
|
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into a prose chunk the closer would cross to the translator as part of the
|
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text, where the model can drop it (the rest of the page then renders inside
|
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the container). A chunk's identity is its **source text**,
|
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gettext-msgid style:
|
||
|
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```python
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chunk_key = blake3(normalize(chunk_text)).digest(9) # bytes; base64 at the JSON level
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```
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|
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(`normalize`: strip trailing whitespace per line, collapse surrounding blank
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lines — so whitespace-only source edits don't invalidate translations.)
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|
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Consequences:
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|
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- Editing the English source invalidates exactly the edited chunks; all
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other fragments keep applying. Stale fragments are simply never referenced
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again and can be garbage-collected lazily (or left; they are tiny).
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- No explicit "source version" bookkeeping is needed — staleness falls out
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of the keys.
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### User patches
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|
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Editors always edit **full Markdown** in the existing editor UX — never
|
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fragments. When editing a translated view (`?lang=es`), the editor is loaded
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with the *current hybrid Markdown*; on save, the server computes a minimal
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diff against that hybrid and stores it as a patch:
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|
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```python
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class Patch(msgspec.Struct, omit_defaults=True):
|
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"""One editing session's overrides, applied independently per hunk."""
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|
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hunks: list[tuple[str, str]] = [] # (search, replace) on hybrid Markdown
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```
|
||
|
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Hunks are produced from `difflib.SequenceMatcher` on the hybrid vs. the
|
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edited text at block granularity: each `replace`/`delete`/`insert` opcode
|
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becomes one `(search, replace)` pair, with the preceding block's tail as
|
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left context for `insert` (pure inserts have empty search context otherwise).
|
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A search text that occurs more than once in the page would hit the first
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occurrence at apply time, so ambiguous hunks grow block context (preceding
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block first) until unique or the page edge.
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Application is dead simple:
|
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```python
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def apply_patch(hybrid: str, patch: Patch) -> str:
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for search, replace in patch.hunks:
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if search and search in hybrid:
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hybrid = hybrid.replace(search, replace, 1)
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# missing search text = stale hunk -> silently skipped
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return hybrid
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```
|
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|
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Per-hunk independence is the robustness property from the scenario: a stale
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text fix does not block a still-valid link change. Patches are stored as an
|
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ordered list and applied in order.
|
||
|
||
### Storage
|
||
|
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Full storage design and the `migrate_v3` restructuring live in
|
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`docs/migrate.md`. The short version, as it concerns this document:
|
||
|
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- Originals **and** translations are content-addressed text chunks in flat
|
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stores: `Data.chunks: dict[bytes, str]` and
|
||
`Data.trans: dict[bytes, dict[str, str]]` (chunk hash → lang → text) —
|
||
path-independent, so repeated paragraphs and menu titles are translated
|
||
once and article moves touch nothing. `Node.chunks: list[bytes]` gives
|
||
each article its order.
|
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- `Node` gains **`language: str = ""`**, inherited down the tree like
|
||
`banner` (empty = nearest ancestor, front page last, site default `en`
|
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final). `select_language` and `<html lang>` use the resolved value instead
|
||
of the global `ORIGINAL_LANGUAGE` constant.
|
||
- **Known weakness:** changing a page's (or subtree's) `language` after
|
||
translations exist mis-keys everything — translations are keyed by
|
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*source* chunks, so old entries silently stop matching and user patches
|
||
(searching for old-hybrid text) mostly go stale. That is acceptable:
|
||
the orphaned data is harmless and translations regenerate. We do not
|
||
migrate translations across a language change.
|
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- Article paths are stored and keyed **without leading slashes**
|
||
(`"docs/setup"`, front page `""`); slashes are added only in hrefs.
|
||
|
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### Render pipeline (the phase-1 `get_translation` stub, now real)
|
||
|
||
```python
|
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def get_translation(data, path, lang) -> Translation | None:
|
||
if lang not in node.langs:
|
||
return None
|
||
hybrid = "\n\n".join(
|
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chunks[h] if h in node.no_trans else trans.get(h, {}).get(lang, chunks[h])
|
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for h in node.chunks
|
||
)
|
||
for patch in data.patches.get(f"{path}:{lang}", []):
|
||
hybrid = apply_patch(hybrid, patch)
|
||
# Deleting an extra (translation-only) paragraph leaves its surrounding
|
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# blank lines behind; re-chunking normalizes them away.
|
||
hybrid = join_chunks(chunk_markdown(hybrid))
|
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return Translation(markdown=hybrid, titles=title_map(data, lang))
|
||
```
|
||
|
||
- Availability is an article-level index: `node.langs: dict[lang, True]`,
|
||
maintained by the translation writers (translator job, patch saves) in the
|
||
same transaction as their data writes — rendering and language selection
|
||
never probe the `trans` store chunk by chunk. A stale key is benign (the
|
||
"translation" just renders as the original).
|
||
- `titles` for nav/sidebar/cards: each node's translated title is
|
||
`trans.get(hash(node.title), {}).get(lang)` with per-node fallback — one
|
||
dict lookup per nav item at render time.
|
||
- Cache invalidation: writes to `chunks` / `trans` / `patches` (translator,
|
||
editor saves) call `_invalidate_pages()`, same as content writes.
|
||
|
||
### Editor flow
|
||
|
||
The page and structure editors share one language selector (`LangSelect.vue`:
|
||
a small flag button opening a dropdown; the same country-flag-icons set as
|
||
the analytics visitor cells), v-modeled on one shell-wide selection
|
||
(`editorLang.js`, `''` = the primary language). The page editor lists the
|
||
page's own primary language (`Node.language`, resolved through the
|
||
hierarchy and echoed in the WS doc as `primary_lang`) plus the union of
|
||
the page's translations (`node.langs`) and
|
||
the site-wide `translate_langs`; it always opens in the primary language,
|
||
even when the page itself was served in a translation. A note under the
|
||
toolbar states the blast radius:
|
||
edits to the primary language re-chunk the original (invalidating the
|
||
affected translation fragments everywhere); edits to a translation stay
|
||
local to that language.
|
||
|
||
While the editor panel is open, its language selection **overrides the
|
||
normal language preferences** for the page preview: EditorShell pins every
|
||
in-place re-render and pagerite.js fetch/prefetch to it (`?lang=` — a
|
||
primary selection pins by the current page's own resolved primary, which
|
||
`select_language` honors), and closing the panel restores the normal
|
||
preferences.
|
||
|
||
- WS `open` with a `lang` returns the effective **hybrid** Markdown and
|
||
title for that language (ungated by `node.langs` — a language without
|
||
any fragments yet starts from the original text), plus the language
|
||
metadata (`lang`, `primary_lang`, `langs`, `translate_langs`).
|
||
- The editor keeps a **shadow copy** of the Markdown it opened. WS `save`
|
||
with `lang` sends it as `base`; the server diffs `base` → submitted text
|
||
(`make_patch`) and appends a `Patch`. Diffing against the shadow (rather
|
||
than the current hybrid) keeps hunks correct when the original or the
|
||
machine translation moved under an open editor; application against the
|
||
then-current hybrid stays best-effort per hunk, as designed.
|
||
- A changed **title** on a translated save becomes a fragment in
|
||
`Data.trans` keyed by the original title's chunk hash — the same storage
|
||
as machine title translations. An untouched title field (holding the
|
||
served translation) is not sent, so saving never freezes a stale machine
|
||
title into an override.
|
||
- Saving never deletes; a translation additionally cannot be emptied (that
|
||
would render as a blank page in that language).
|
||
- The live preview renders the version being edited, whichever language
|
||
the page itself was loaded in (the render is just the edited Markdown +
|
||
title). A translated save keeps that preview in place — re-fetching the
|
||
page would come back in the header-selected language.
|
||
- Saving the primary-language version re-chunks the submitted Markdown and
|
||
updates `Data.chunks` / `node.chunks` — only genuinely new text lands in
|
||
the kanta change diff (see docs/migrate.md).
|
||
|
||
The **structure editor** selects from the same languages with the same
|
||
`LangSelect` (the selection is shared — switching in either tab switches
|
||
both, and the preview). It is also where a page's **primary language** is
|
||
configured: each row carries a small flag dropdown (the resolved flag,
|
||
dimmed while inherited) that sets `Node.language` via a structure op —
|
||
'' = inherit, so setting it on a section covers the whole subtree. The
|
||
tree it
|
||
lists (`GET /_api/pages?lang=`) comes back with per-language titles where a
|
||
translation exists (`translated` marks those rows; untranslated rows show
|
||
the original title, dimmed). Retitling in a non-primary language posts the
|
||
structure op with a `lang` and writes a per-language title fragment in
|
||
`Data.trans` (keyed by the original title's chunk hash, exactly like a
|
||
machine title translation — a user edit simply overwrites it); sending the
|
||
original's text drops the override. The structure itself — slugs,
|
||
hierarchy, order — is language-independent, so pending rows, slug edits,
|
||
drag-and-drop and deletes work identically in every language.
|
||
|
||
### Translator service API
|
||
|
||
An external machine-translation service connects over WebSocket at
|
||
`/_translate/{key}` — deliberately **not** under `/_api`: the SSO
|
||
forward-auth does not cover that route, and the key in the path is the
|
||
access control. Keys live in `Data.translate_keys` (key -> display name) —
|
||
12 lowercase alphanumeric characters each; the first is generated at
|
||
database bootstrap, further ones are managed in the editor's lang tab
|
||
(add/rename/delete ride the `PUT /_api/settings` round-trip; the name is
|
||
an inline display label only). The full WS URL(s) are printed in the
|
||
startup log (`ws://localhost:{port}/_translate/{key}` locally,
|
||
`wss://{hostname}/_translate/{key}` on a public hostname) and shown in the
|
||
lang tab as click-to-copy links; the keys are also surfaced in
|
||
`GET /_api/settings` as `translate_keys`. An unknown or empty key rejects
|
||
the handshake (close-before-accept → HTTP 403). Transactions storing results record the connecting key as the kanta
|
||
transaction `user`.
|
||
|
||
Frames are JSON-encoded tagged msgspec structs (`pagerite/translate.py`;
|
||
`bytes` fields ride as base64):
|
||
|
||
- `{"type": "hello", "langs": [...], "model", "modes"}` — client greeting
|
||
announcing its **capabilities**: the language codes its model can produce
|
||
(normalized to base subtags; `en`/empty dropped). `model` is a free-form
|
||
model string (logging only); `modes` lists the job granularities the
|
||
client accepts (default `["segments"]`, see Job modes below).
|
||
- `{"type": "job", "lang", "key", "texts", "path", "kind", "mode",
|
||
"contexts"}` — server push: ONE fragment to translate (an article title
|
||
or a chunk). In the default `segments` mode `texts` is a list of **prose
|
||
segments** (see Segmentation below) and `contexts` is parallel to `texts`
|
||
("" = none): the surround to translate the segment in — for clients that
|
||
translate better with context (see below). Contexts are not part of the
|
||
result. See Job modes for the other modes.
|
||
- `{"type": "result", "lang", "key", "texts"}` — client reply: the
|
||
segments translated, same order and count, matching its job by (lang, key).
|
||
|
||
Which languages get translated is **server-configured**:
|
||
`Data.translate_langs` (presence-key dict, bootstrapped to Spanish and
|
||
Chinese — edited in the editor shell's localization tab, whose flag grid
|
||
lists every language including English, or set via `/_api/settings` as
|
||
`translate_langs`). A target equal to an article's own primary language is
|
||
skipped per article (its original already is that language), so the set
|
||
may freely contain the site default. The dispatcher offers a
|
||
connection jobs only in `wanted ∩ capable`; a connection without overlap
|
||
simply stays idle.
|
||
|
||
`DELETE /_api/translations` (the localization tab's "refresh all
|
||
translations" button) drops every machine translation (`Data.trans`) and
|
||
rebuilds the availability index (`node.langs`) from the surviving user
|
||
patches, so the dispatcher re-translates everything from scratch; the
|
||
run's validation skip-list is cleared with it, giving rejected fragments
|
||
another chance.
|
||
|
||
Dispatch semantics (the `Dispatcher` in `pagerite/translate.py`; api.py only
|
||
registers the route):
|
||
|
||
- **One job at a time per connection** — the next job is sent only after
|
||
the current one's result. Clients wanting parallelism open multiple
|
||
connections (e.g. several `scripts/translator.py` instances).
|
||
- Pending work is derived from the `trans` store
|
||
(`translate.pending_items`) minus the items in flight on any connection,
|
||
so a **disconnect requeues** that connection's in-flight item and it is
|
||
offered to any free capable connection.
|
||
- Dispatch re-runs on every relevant event: Hello, result, disconnect and
|
||
content change (`_invalidate_pages()` schedules it, so the pass runs
|
||
after the writing transaction commits).
|
||
- A result with no job in flight, a mismatched (lang, key), a duplicate
|
||
hello, or any malformed frame closes the socket with a protocol error.
|
||
|
||
Results are stored into `trans` in one transaction and set
|
||
`node.langs[lang]` on every article they touch (shared chunks make several
|
||
pages gain a language from one fragment). Unknown keys are stored anyway
|
||
and re-storing overwrites — results are idempotent.
|
||
|
||
#### Job modes: segments, markdown, article
|
||
|
||
Instruct LLMs understand Markdown natively, so for them the segmentation
|
||
round trip below is unnecessary scaffolding (docs/llm-translation.md for
|
||
the design and the model trial evidence). `Hello.modes` announces which
|
||
job granularities a connection accepts; routing is per connection and per
|
||
mode, so a mixed fleet (a Seed-X instance, a local qwen, an API-backed
|
||
client) shares the work by capability. The validation skip-list is
|
||
mode-scoped — `(lang, key, mode)` — so a fragment one model rejects stays
|
||
offerable to clients of another approach.
|
||
|
||
- **`segments`** (default when a client omits `modes`) — the protocol as
|
||
described so far: `Job.texts` carries prose segments, `Result.texts`
|
||
returns them, the server splices by offset.
|
||
- **`markdown`** — one fragment as full Markdown: `Job.texts` carries a
|
||
single element, the chunk (a title crosses as plain text, with the
|
||
article's opening as its context as today). `Job.contexts` carries the
|
||
previous and next block of the **served hybrid** in the target language
|
||
(machine translation with user patches applied, "" where none), so human
|
||
corrections propagate into fresh translations as terminology/tone
|
||
reference; contexts are never part of the result. The result must
|
||
re-chunk to exactly one block with the source's anchor constructs (link
|
||
and image destinations, `{...}` placeholders) intact (`clean_block`),
|
||
then stores to `Data.trans` as usual.
|
||
- **`article`** — a whole page at once, offered only to article-capable
|
||
connections and only while a page is *mostly* pending (a new article or
|
||
a full refresh; steady-state edit follow-up stays scoped jobs). The
|
||
job's key is the page's first chunk; `Job.texts` carries the full
|
||
original Markdown — with the page title injected as a `# {title}` line
|
||
at the top when the render would inject it (the body has no h1 of its
|
||
own), so the title translates in document context and the opening
|
||
paragraphs see the heading. The result is decomposed per chunk
|
||
(`align_article`): non-translatable blocks (code fences, container
|
||
fences, raw HTML — everything `needs_translation` rejects) must appear
|
||
verbatim and in order and anchor the alignment; regions between anchors
|
||
pair positionally, a region whose block count changed stores nothing
|
||
(its chunks stay pending and fall back to scoped jobs), and a paired
|
||
block whose destinations/placeholders did not survive likewise. An
|
||
injected title heading's pair becomes the title fragment (heading text
|
||
only — never a body chunk; a demoted or merged heading simply skips it
|
||
and the title stays pending for a scoped title job).
|
||
|
||
`scripts/llm_translator.py` is the reference markdown+article client
|
||
(instruct LLMs via an OpenAI Chat Completions endpoint or ollama's native
|
||
API); `scripts/translator.py` (Seed-X) is untouched and announces
|
||
`["segments"]` implicitly.
|
||
|
||
**Importing human-made full translations:** `align_article` doubles as an
|
||
import path — `scripts/import_translation.py PATH LANG FILE.md` (run with
|
||
the server stopped) decomposes a pasted whole-article translation (e.g.
|
||
from ChatGPT) into proper `Data.trans` fragments with the same validation,
|
||
so later source edits invalidate and re-translate per chunk rather than
|
||
letting the translation editor's one monolithic patch go stale hunk by
|
||
hunk.
|
||
|
||
#### Segmentation
|
||
|
||
Fragments cross the wire as **prose segments** (`pagerite/segments.py`): the
|
||
fragment is parsed with the project's own markdown-it setup
|
||
(`markdown.make_md(verbatim=True)` — all extensions, but no typographer or
|
||
tasklist label wrapping, so token text stays byte-identical to the source)
|
||
and split into the runs a model may touch: paragraph/heading/table-cell text
|
||
(merged across soft line breaks), image alt texts and captions, footnote
|
||
bodies. A block of plain text, inline **links and paired text formatting**
|
||
(strong/em/s) **stays whole** — link and formatted texts cross inline, in
|
||
sentence context, with the Markdown stripped (see below). Everything else
|
||
never leaves the server: code spans and
|
||
fences, URLs and autolinks, link/image *destinations*, `{...}` spans
|
||
(placeholders like `{dates}` as well as attrs), reference and footnote
|
||
labels, container fences, GFM alert markers (`[!NOTE]`), raw HTML — and the
|
||
remaining markup punctuation (`|`, `:::`), which is a run boundary.
|
||
Chunks with no segments (a lone `{dates}`, container fences, pure
|
||
code/HTML) are never dispatched at all (`needs_translation`); every
|
||
language renders them from the original chunk. Each segment is accompanied
|
||
by a context string (a segment carved out of a larger block carries the
|
||
block's plain text; a whole-block segment carries "") — context is a
|
||
prompt aid only, never spliced into the result.
|
||
|
||
Reassembly is offset splicing, not text the model produced: each segment's
|
||
source span was located at dispatch (sequential search; a run that is not a
|
||
verbatim source substring — entity-decoded text, backslash escapes — is
|
||
skipped and stays in the original language), and the returned translations
|
||
are swapped in by offset. Markup corruption is therefore impossible by
|
||
construction; the failure modes that remain are a wrong segment count, an
|
||
empty segment, markup injected INTO a segment (a `<br>` in a title
|
||
translation would splice live HTML), or a line that would start a new
|
||
block where the segment lands (a ``` or ::: fence line would eat the rest
|
||
of the block it splices into, closing fence included — segments are
|
||
inline prose, so `pure_prose` alone cannot see this) — each returned
|
||
segment must parse as
|
||
pure prose with no block-starting line or blank line, or the whole result
|
||
is dropped and logged, and the (lang, key, mode)
|
||
combination is skipped for the rest of the server run (generation is
|
||
near-deterministic per model, so an immediate retry in the same mode would
|
||
re-fail; the fragment stays
|
||
pending and gets another chance on restart, in another mode, or on
|
||
`DELETE /_api/translations`).
|
||
`Data.trans` therefore only ever holds clean translated Markdown.
|
||
|
||
Link- and formatting-carrying blocks are the one place a segment is not
|
||
spliced verbatim: a label translated apart from its sentence comes back
|
||
grammatically incompatible with it (case government, particles, word
|
||
order), and shown the Markdown the model mangles it (Seed-X dropped the
|
||
`**` and the glued-on colon in `**Pagerite**: …`), so the block crosses
|
||
whole — all Markdown stripped — and the server re-inserts the link and
|
||
formatting syntax into the translated block. The boundaries are found by
|
||
**text processing alone** —
|
||
markers on the wire are hopeless (an earlier sentinel-masking design let
|
||
the model see and mangle exactly that punctuation: Seed-X renumbered the
|
||
tokens and turned `` or `**`. Blocks mixing in any other inline
|
||
markup (code spans, images, raw HTML) don't qualify and still split into
|
||
runs at those boundaries.
|
||
|
||
Punctuation is the translator's own job: Seed-X tends to "finish" short
|
||
labels (titles, nav items) with a comma or period the source never had.
|
||
Prompt wording is NOT the fix — a punctuation-instruction clause made
|
||
Seed-X slip into its `[COT]` reasoning mode (minutes-long generations with
|
||
reasoning text in the output, observed for Chinese). The reference client
|
||
enforces punctuation deterministically instead (`match_punctuation` in
|
||
scripts/translator.py): a translation of a segment without terminal
|
||
punctuation gets any added trailing marks (and a newly opened Spanish ¡/¿)
|
||
stripped before the result goes back.
|
||
|
||
The same client-side enforcement covers markup bleed as a CLASS, not per
|
||
artifact: `<` is the prose/markup boundary on the wire and never appears in
|
||
a segment in either direction. A literal `<` in the source text (`<1MB` is
|
||
text, not markup — a tag needs a letter or `/!?`) crosses encoded as the
|
||
fullwidth `<` and is decoded on return, before the result is validated and
|
||
spliced (segments.py) — the wire itself still never carries `<`, and the
|
||
reference client cuts the model's output at the first `<`
|
||
(scripts/translator.py) — echoed language tags, stray `<br>`s and any
|
||
future variant are one handled case. (The cut is post-decode, not a
|
||
generation stop string: Seed-X opens every generation with its `<s>`
|
||
framing token, which would trip a `<` stop immediately.)
|
||
|
||
Server-side, a second layer covers what the inline parser cannot: ASCII
|
||
punctuation that is plain prose on the wire but Markdown syntax in the
|
||
splice context — quotes (a translated `"` would close the quoted image
|
||
title it lands in), brackets (alt texts, re-inserted link texts), `|` in
|
||
table rows, `\` escapes. Rather than rejecting such results, `join` swaps
|
||
them for Unicode look-alikes before splicing (`_NEUTRAL` in
|
||
segments.py — curly quotes, fullwidth brackets; the renderer's
|
||
typographer curls straight quotes anyway).
|
||
|
||
Short fragments get more than a bare prompt: each segment may carry its
|
||
surround in `Job.contexts` — a title carries the article's opening prose
|
||
(its own block is just the title word), a segment carved out of a larger
|
||
block (a partial run; a link text whose block didn't qualify for the
|
||
whole-block treatment) carries the block's plain text, and a
|
||
whole-block segment (a plain paragraph) is self-contextualizing and carries
|
||
"". The reference client translates segment and surround together, stops
|
||
generation at the blank line separating them, and keeps the segment's own
|
||
part of the output (its line resp. paragraph; a hard-break `␣␣\n` separator
|
||
works too). If the model merged them (no separator, or an empty first
|
||
part), it falls back to translating the segment alone. The surround fixes
|
||
context-free readings ("About" as "approximately" — with the opening it
|
||
becomes "Tietoa"/"Acerca de"; "here" as "就在这里" → the idiomatic
|
||
"点击这里") and, as a side effect, most stray trailing punctuation.
|
||
|
||
### Explicitly out of scope for phase 2
|
||
|
||
- The machine translation itself: the API above moves fragments in and out;
|
||
the translating is external. `scripts/translator.py` is the reference
|
||
client (Seed-X-PPO-7B only — its 28 languages are the ceiling).
|
||
- Garbage collection of orphaned chunks/translations (see docs/migrate.md).
|
||
- sitemap.xml per-language entries; translated UI chrome; per-language
|
||
typographer options; multi-locale date/number formatting.
|