- add COPYING (GPL-3.0-or-later) and license headers to all elisp
and C sources; real author/maintainer info replaces placeholders
- convert user-facing options to defcustom under new group `ekp'
(spacing internals managed by ekp-param-set stay defvars)
- autoload user commands: ekp-param-reset, ekp-clear-caches,
ekp-c-module-load, ekp-c-module-build
- ekp--load-dicts: a missing dictionaries/ directory now only
disables hyphenation instead of breaking (require 'ekp);
ekp--split-with-hyphen degrades gracefully (and resolves the
hyphenator once per call instead of once per word)
- package summary no longer redundantly says "for Emacs"
- Makefile: drop personal Windows EMACS_ROOT default; add guidance
- ekp_c/README.md: fix stale 1.1 version references (module is 1.4)
- DEVELOPER*.md: remove archive/ from file map (not in the repo)
- remove unreferenced 10 MB demo GIF
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Buffers past ekp-auto-justify-lazy-threshold (20k chars) no longer
re-justify wholesale on a width change: the visible span updates
synchronously and the rest follows in polite background chunks
(run-with-timer ticks that yield to pending input). Measured on a
300-paragraph, 132k-char article: perceived latency 332 ms → 15 ms,
background completion ~0.5 s.
Fixed in the process: adjacent chunk markers shared a boundary, and
the earlier chunk's delete+insert pushed the next chunk's start
marker back over the freshly inserted text — chunks grew linearly
(2.2k, 4.9k, 7.4k… chars) and background work went quadratic (14 s).
Start markers now use insertion-type t. Regression test asserts the
chunked result equals the one-shot result property-for-property.
Also: org/markdown skip-face presets (ekp-region-org-skip-faces /
ekp-region-markdown-skip-faces), MELPA header hygiene (Version + URL
on the main file, stale Package-Requires dropped from ekp-hyphen.el),
readme notes.
67 ERT green; fuzz 300/300.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Investigation: the apparent 7× bench regression was interpreted-mode
measurement (tests always deleted .elc); byte-compiled + C the real
P1/P2 cost was +70–90%. Worktree A/B across phase commits confirmed
the features themselves added ~+20% interpreted.
Optimizations (all verified by the 66-test suite + 300-case fuzz):
- per-char memo table for ekp--str-type (get-char-code-property was
the para-build hot spot)
- precomputed punctuation char lists (no per-call list rebuild)
- ekp--box-offsets memoized in the paragraph struct
- interned glue strings for the two dominant payload shapes
- rendered-output cache per (paragraph, width) inside dp-cache
(capped at 64 widths per paragraph), so resize sweeps that revisit
a width skip rendering entirely
- unjustify walks hop property boundaries instead of chars
Numbers (byte-compiled + C): justify zh w=200 53.8 ms — at parity
with the pre-feature record (57 ms) despite punctuation boxes and
break permissions; range zh 117 ms (+55%, inherent box-count cost).
Continuous reflow, 60-paragraph 26k-char article through the full
region layer: 187 ms → 73 ms per width change; incremental
single-paragraph re-justify after an edit: 62 ms → 17 ms.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paragraphs stay verbatim (never justified, byte-identical through
justify/auto-mode/unjustify) when they carry the ekp-verbatim text
property, wear a face from ekp-region-skip-faces (point it at
org-block / markdown-code-face and code blocks are exempt), or match
the buffer-local ekp-region-skip-predicate — three layers of the same
general mechanism, no mode-specific code. Inline code inside prose
is the existing ekp-no-break atom (rigid, unbreakable, unhyphenated).
New commands: ekp-verbatim-region / ekp-clear-verbatim-region.
Core engine untouched: block protection lives entirely in the region
layer, so skipped text never even reaches the tokenizer.
Tests: 66 ERT green (property / face / predicate paths, exact
roundtrips around justified prose).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ekp-protrusion enables microtype-style character protrusion at the
right edge: a line ending in fullwidth punctuation (。、」…) hangs
the whitespace half of the glyph past the flush edge — visually
identical to CLREQ line-end punctuation compression — and latin
periods/commas/quotes and soft hyphens protrude by their configured
ratios (ekp-protrusion-ratios).
Mechanics: per-box tail protrusion, folded through trailing space
boxes into a per-gap array; each DP candidate widens its effective
target (lw = width + release), mirrored exactly in the renderer's
per-line effective width and in the C-result reconstruction, so DP,
rendering and both engines stay coherent. Left-edge protrusion is
documented as out of scope (Emacs cannot render before the line
origin). ekp-region reserves the protrusion width in auto layouts
(ekp-region-protrusion-reserve).
Off by default; all-zero arrays make it a no-op on the shared path.
C module 1.4: break-with-arrays 12→14 args (tail-protrudes array,
hyphen-protrude scalar), batch vectors 14 elements.
Tests: 59 ERT green (deterministic hang check, flush-when-off,
protrusion C parity); fuzz 300/300.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- text property ekp-no-break turns any span into a rigid typesetting
atom: no line break inside, no hyphenation, literal spacing (space
runs inside the span become preserved space boxes instead of
stretchable glue) — inline code, product names, numbers with units
- character-driven joins: NBSP, NARROW NBSP, FIGURE SPACE keep their
neighbors together (they are boxes whose adjacent gaps are
unbreakable and glue-free — the character supplies its spacing);
WORD JOINER / ZWNBSP attach invisibly like combining marks
- new commands: ekp-no-break-region / ekp-allow-break-region
- overlong atoms fall back to single emergency lines (atomic-run
handling from the break-permission layer); zero C changes needed
Tests: 52 ERT green incl. atomicity across widths, hyphenation
suppression, NBSP/WJ adjacency sweeps; fuzz 300/300 with C parity.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The renderer (shared by both engines) is now lossless: synthesized
glue carries the original text it replaced (ekp-glue), soft line
breaks carry the whitespace swallowed around the break
(ekp-soft-break), break hyphens are marked (ekp-soft-hyphen), and
paragraph-edge whitespace survives as zero-display ekp-hidden text.
Orphaned ekp--combine-glues-and-boxes / ekp--interleave removed.
New ekp-region.el:
- ekp-justify-region / ekp-unjustify-region: in-place justification
with exact structural restore (character- and property-exact),
robust to edits made while justified
- ekp-auto-justify-mode: keeps the buffer justified at the window
width; debounced re-flow on window resize, incremental
per-paragraph re-justification after edits (served by the
paragraph cache)
- fix found in live GUI testing: buffer-local members of
window-size-change-functions receive the WINDOW as argument and
may run with an unrelated buffer current; the handler now resolves
window and buffer explicitly (regression test included)
Tests: 47 ERT (36 core + 11 region) passing; 300-case fuzz 0
failures (C/elisp parity unchanged); byte-compile clean with
error-on-warn. Verified interactively in GUI Emacs: justified at
1403px maximized, auto-reflowed to 614px on frame resize.
docs: interactive-use section in readme.md / readme_zh.md
ci: byte-compile list includes ekp-region.el
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
