giles 1eadefd0c1 Step 17b: Pretext — DOM-free text layout with otfm font measurement ...

Pure SX text layout library with one IO boundary (text-measure perform).
Knuth-Plass optimal line breaking, Liang's hyphenation, position calculation.

Library (lib/text-layout.sx):
- break-lines: Knuth-Plass DP over word widths
- break-lines-greedy: simple word-wrap for comparison
- hyphenate-word: Liang's trie algorithm
- position-line/position-lines: running x/y sums
- measure-text: single perform (text-measure IO)

Server font measurement (otfm):
- Reads OpenType cmap + hmtx tables from .ttf files
- DejaVu Serif/Sans bundled in shared/static/fonts/
- _cek_io_resolver hook: perform works inside aser/eval_expr
- JIT VM suspension inline resolution for IO in compiled code

~font component (shared/sx/templates/font.sx):
- Works like ~tw: emits @font-face CSS via cssx scope
- Sets font-family on parent via spread
- Deduplicates font declarations

Infrastructure fixes:
- stdin load command: per-expression error handling (was aborting on first error)
- cek_run IO hook: _cek_io_resolver in sx_types.ml
- JIT VmSuspended: inline IO resolution when resolver installed
- ListRef handling in IO resolver (perform creates ListRef, not List)

Demo page at /sx/(applications.(pretext)):
- Hero: justified paragraph with otfm-measured proportional widths
- Greedy vs Knuth-Plass side-by-side comparison
- Badness scoring visualization
- Hyphenation syllable decomposition

25 new tests (spec/tests/test-text-layout.sx), 3201/3201 passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-12 15:13:00 +00:00

..

ref

Delete sx_ref.py — OCaml is the sole SX evaluator

2026-03-24 14:32:55 +00:00

templates

Step 17b: Pretext — DOM-free text layout with otfm font measurement

2026-04-12 15:13:00 +00:00

tests

Split make_server_env, eliminate all runtime sx_ref imports, fix auth-menu tests

2026-03-24 17:23:09 +00:00

__init__.py

Delete sx_ref.py — OCaml is the sole SX evaluator

2026-03-24 14:32:55 +00:00

async_eval.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

boundary.py

Replace invoke with cek-call in reactive island primitives

2026-03-14 10:11:48 +00:00

components.py

Cache parsed components for 10x faster startup (2s → 200ms)

2026-03-12 23:54:38 +00:00

css_registry.py

Remove CSSX style dictionary infrastructure — styling is just components

2026-03-08 00:00:23 +00:00

deps.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

env.py

Fix all 9 spec test failures: Env scope chain, IO detection, offline mutation

2026-03-11 09:42:04 +00:00

handlers.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

helpers.py

VM import suspension for browser lazy loading

2026-04-04 17:11:12 +00:00

html_to_sx.py

Eliminate raw HTML injection: convert ~kg-html/captions to native sx

2026-03-02 19:57:27 +00:00

html.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

jinja_bridge.py

Fix component body serialization: capture ALL body expressions

2026-03-25 16:27:33 +00:00

layouts.py

Include layout + content component deps in streaming page scan

2026-03-07 19:02:29 +00:00

ocaml_bridge.py

Fix signal-add-sub! losing subscribers after remove, fix build pipeline

2026-03-31 07:36:36 +00:00

ocaml_sync.py

Fix bridge newline escaping, stepper optimization, dom-listen dedup

2026-03-25 15:14:10 +00:00

page.py

Rename all 1,169 components to path-based names with namespace support

2026-03-12 22:00:12 +00:00

pages.py

sx-host plan steps 1-2: defhelper + SX config + SXTP spec + nav tools

2026-03-28 15:18:45 +00:00

parser.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

prettify.py

Add admin preview views + fix markdown converter

2026-03-02 00:50:57 +00:00

primitives_ctx.py

Refactor SX primitives: modular, isomorphic, general-purpose

2026-03-06 01:45:29 +00:00

primitives_io.py

OCaml evaluator for page dispatch + handler aser, 83/83 Playwright tests

2026-03-18 17:22:51 +00:00

primitives_stdlib.py

Remove CSSX style dictionary infrastructure — styling is just components

2026-03-08 00:00:23 +00:00

primitives.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

query_executor.py

Complete Python eval removal: epoch protocol, scope consolidation, JIT fixes

2026-03-24 16:14:40 +00:00

query_registry.py

Split make_server_env, eliminate all runtime sx_ref imports, fix auth-menu tests

2026-03-24 17:23:09 +00:00

relations.py

Fix quasiquote flattening bug, decouple relations from evaluator

2026-03-11 04:53:34 +00:00

resolver.py

Delete sx_ref.py — OCaml is the sole SX evaluator

2026-03-24 14:32:55 +00:00

types.py

Replace invoke with cek-call in reactive island primitives

2026-03-14 10:11:48 +00:00