1 ;;; fuel-markup.el -- printing factor help markup -*- lexical-binding: t -*-
3 ;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
4 ;; See https://factorcode.org/license.txt for BSD license.
6 ;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
7 ;; Keywords: languages, fuel, factor
8 ;; Start date: Thu Jan 01, 2009 21:43
12 ;; Utilities for printing Factor's help markup.
25 (defface fuel-font-lock-markup-title '((t (:inherit bold)))
26 "article titles in help buffers"
31 (defface fuel-font-lock-markup-heading '((t (:inherit bold)))
32 "headlines in help buffers"
37 (defface fuel-font-lock-markup-link '((t (:inherit link)))
38 "links to topics in help buffers"
43 (defface fuel-font-lock-markup-emphasis '((t (:inherit italic)))
44 "emphasized words in help buffers"
49 (defface fuel-font-lock-markup-strong '((t (:inherit link)))
50 "bold words in help buffers"
58 (defvar-local fuel-markup--follow-link-function 'fuel-markup--echo-link)
60 (define-button-type 'fuel-markup--button
61 'action 'fuel-markup--follow-link
62 'face 'fuel-font-lock-markup-link
65 (defun fuel-markup--follow-link (button)
66 (when fuel-markup--follow-link-function
67 (funcall fuel-markup--follow-link-function
68 (button-get button 'markup-link)
69 (button-get button 'markup-label)
70 (button-get button 'markup-link-type))))
72 (defun fuel-markup--echo-link (link label type)
73 (message "Link %s pointing to %s named %s" label type link))
75 (defun fuel-markup--insert-button (label link type)
76 (let ((label (format "%s" label))
77 (link (if (listp link) link (format "%s" link))))
78 (insert-text-button label
79 :type 'fuel-markup--button
82 'markup-link-type type
83 'help-echo (format "%s (%s)" label type))))
85 (defun fuel-markup--article-title (name)
86 (let ((name (if (listp name) (cons :seq name) name)))
87 (fuel-eval--retort-result
88 (fuel-eval--send/wait `(:fuel* ((,name fuel-get-article-title)) "fuel")))))
90 (defun fuel-markup--link-at-point ()
91 (let ((button (condition-case nil (forward-button 0) (error nil))))
93 (list (button-get button 'markup-link)
94 (button-get button 'markup-label)
95 (button-get button 'markup-link-type)))))
97 (defun fuel-markup--nav-crumbs (e)
98 (fuel-markup--links e " > ")
103 (defconst fuel-markup--printers
104 '(($all-tags . fuel-markup--all-tags)
105 ($all-authors . fuel-markup--all-authors)
106 ($author . fuel-markup--author)
107 ($authors . fuel-markup--authors)
108 ($class-description . fuel-markup--class-description)
109 ($code . (lambda (e) (fuel-markup--code e t)))
110 ($command . fuel-markup--command)
111 ($command-map . fuel-markup--null)
112 ($contract . fuel-markup--contract)
113 ($curious . fuel-markup--curious)
114 ($definition . fuel-markup--definition)
115 ($description . fuel-markup--description)
116 ($doc-path . fuel-markup--doc-path)
117 ($emphasis . fuel-markup--emphasis)
118 ($error-description . fuel-markup--error-description)
119 ($errors . fuel-markup--errors)
120 ($example . (lambda (e) (fuel-markup--code e t)))
121 ($examples . fuel-markup--examples)
122 ($fuel-nav-crumbs . fuel-markup--nav-crumbs)
123 ($heading . fuel-markup--heading)
124 ($index . fuel-markup--index)
125 ($instance . fuel-markup--instance)
126 ($io-error . fuel-markup--io-error)
127 ($link . fuel-markup--link)
128 ($links . (lambda (e) (fuel-markup--links e ", ")))
129 ($list . fuel-markup--list)
130 ($low-level-note . fuel-markup--low-level-note)
131 ($markup-example . fuel-markup--markup-example)
132 ($maybe . fuel-markup--maybe)
133 ($sequence . fuel-markup--sequence)
134 ($methods . fuel-markup--methods)
135 ($next-link . (lambda (e) (fuel-markup--prefixed-link "Next:" e)))
136 ($nl . fuel-markup--newline)
137 ($notes . fuel-markup--notes)
138 ($operation . fuel-markup--link)
139 ($or . fuel-markup--or)
140 ($parsing-note . fuel-markup--parsing-note)
141 ($predicate . fuel-markup--predicate)
142 ($prettyprinting-note . fuel-markup--prettyprinting-note)
143 ($prev-link . (lambda (e) (fuel-markup--prefixed-link "Prev:" e)))
144 ($quotation . fuel-markup--quotation)
145 ($references . fuel-markup--references)
146 ($related . fuel-markup--related)
147 ($see . fuel-markup--word-info)
148 ($see-also . fuel-markup--see-also)
149 ($shuffle . fuel-markup--shuffle)
150 ($side-effects . fuel-markup--side-effects)
151 ($slot . fuel-markup--snippet)
152 ($snippet . fuel-markup--snippet)
153 ($strong . fuel-markup--strong)
154 ($subheading . fuel-markup--subheading)
155 ($subsection . fuel-markup--subsection)
156 ($subsections . fuel-markup--subsections)
157 ($synopsis . fuel-markup--word-info)
158 ($syntax . fuel-markup--syntax)
159 ($table . fuel-markup--table)
160 ($tag . fuel-markup--tag)
161 ($tags . fuel-markup--tags)
162 ($unchecked-example . (lambda (e) (fuel-markup--code e t)))
163 ($url . fuel-markup--url)
164 ($value . fuel-markup--value)
165 ($values . fuel-markup--values)
166 ($values-x/y . fuel-markup--values-x/y)
167 ($var-description . fuel-markup--var-description)
168 ($vocab . fuel-markup--vocab)
169 ($vocab-link . fuel-markup--vocab-link)
170 ($vocab-links . fuel-markup--vocab-links)
171 ($vocab-subsection . fuel-markup--vocab-subsection)
172 ($warning . fuel-markup--warning)
173 (article . fuel-markup--article)
174 (describe-words . fuel-markup--describe-words)
175 (vocab-list . fuel-markup--vocab-list)))
177 (defvar-local fuel-markup--maybe-nl nil)
179 (defun fuel-markup--print (e)
180 (cond ((null e) (insert "f"))
181 ((stringp e) (fuel-markup--insert-string e))
182 ((and (listp e) (symbolp (car e))
183 (assoc (car e) fuel-markup--printers))
184 (funcall (alist-get (car e) fuel-markup--printers) e))
186 (assoc e fuel-markup--printers))
187 (funcall (alist-get e fuel-markup--printers) e))
188 ((listp e) (mapc 'fuel-markup--print e))
189 ((symbolp e) (fuel-markup--print (list '$link e)))
190 (t (insert (format "\n%S\n" e)))))
192 (defun fuel-markup--print-str (e)
194 (fuel-markup--print e)
197 (defun fuel-markup--maybe-nl ()
198 (setq fuel-markup--maybe-nl (point)))
200 (defun fuel-markup--insert-newline (&optional justification nosqueeze)
201 (fill-region (save-excursion (beginning-of-line) (point))
203 (or justification 'left)
207 (defsubst fuel-markup--insert-nl-if-nb (&optional no-fill)
208 (unless (eq (save-excursion (beginning-of-line) (point)) (point))
209 (if no-fill (newline) (fuel-markup--insert-newline))))
211 (defsubst fuel-markup--put-face (txt face)
212 (put-text-property 0 (length txt) 'font-lock-face face txt)
215 (defun fuel-markup--insert-heading (txt &optional no-nl)
216 (fuel-markup--insert-nl-if-nb)
218 (unless (bobp) (newline))
219 (fuel-markup--put-face txt 'fuel-font-lock-markup-heading)
220 (fuel-markup--insert-string txt)
221 (unless no-nl (newline)))
223 (defun fuel-markup--insert-string (str)
224 (when fuel-markup--maybe-nl
226 (setq fuel-markup--maybe-nl nil))
229 (defun fuel-markup--article (e)
230 (setq fuel-markup--maybe-nl nil)
231 (insert (fuel-markup--put-face (cadr e) 'fuel-font-lock-markup-title))
233 (fuel-markup--print (car (cddr e))))
235 (defun fuel-markup--heading (e)
236 (fuel-markup--insert-heading (cadr e)))
238 (defun fuel-markup--subheading (e)
239 (fuel-markup--insert-heading (cadr e)))
241 (defun fuel-markup--subsection (e)
242 (fuel-markup--insert-nl-if-nb)
244 (fuel-markup--link (cons '$link (cdr e)))
245 (fuel-markup--maybe-nl))
247 (defun fuel-markup--subsections (e)
248 (dolist (link (cdr e))
249 (fuel-markup--insert-nl-if-nb)
251 (fuel-markup--link (list '$link link))
252 (fuel-markup--maybe-nl)))
254 (defun fuel-markup--vocab-subsection (e)
255 (fuel-markup--insert-nl-if-nb)
257 (fuel-markup--vocab-link (cons '$vocab-link (cdr e)))
258 (fuel-markup--maybe-nl))
260 (defun fuel-markup--newline (e)
261 (fuel-markup--insert-newline)
264 (defun fuel-markup--doc-path (e)
265 (fuel-markup--insert-heading "Related topics")
267 (dolist (art (cdr e))
268 (fuel-markup--insert-button (car art) (cadr art) 'article)
271 (fuel-markup--insert-newline 'left))
273 (defun fuel-markup--emphasis (e)
274 (when (stringp (cadr e))
275 (fuel-markup--put-face (cadr e) 'fuel-font-lock-markup-emphasis)
278 (defun fuel-markup--strong (e)
279 (when (stringp (cadr e))
280 (fuel-markup--put-face (cadr e) 'fuel-font-lock-markup-strong)
283 (define-button-type 'fuel-markup--url
284 'action 'fuel-markup--follow-url
285 'face 'fuel-font-lock-markup-link
288 (defun fuel-markup--follow-url (button)
289 (browse-url (button-get button 'markup-link)))
291 (defun fuel-markup--url (e)
292 (let ((url (cadr e)))
293 (insert-text-button url
294 :type 'fuel-markup--url
297 (defun fuel-markup--snippet (e)
298 (insert (mapconcat #'(lambda (s)
300 (factor-font-lock-string s)
301 (fuel-markup--print-str s)))
305 (defun fuel-markup--code (e indent)
306 (fuel-markup--insert-nl-if-nb)
308 (dolist (snip (cdr e))
309 (unless (stringp snip)
310 (error "snip is not a string"))
311 (dolist (line (split-string (factor-font-lock-string snip) "\n"))
312 (when indent (insert " "))
317 (defun fuel-markup--command (e)
318 (fuel-markup--snippet (list '$snippet (nth 3 e))))
320 (defun fuel-markup--syntax (e)
321 (fuel-markup--insert-heading "Syntax")
322 (fuel-markup--print (cons '$code (cdr e)))
325 (defun fuel-markup--markup-example (e)
326 (fuel-markup--insert-newline)
327 (fuel-markup--snippet (cons '$snippet (cdr e))))
329 (defun fuel-markup--link (e)
330 (let* ((link (or (nth 1 e) 'f))
331 (type (or (nth 3 e) (if (symbolp link) 'word 'article)))
333 (and (eq type 'article)
334 (fuel-markup--article-title link))
336 (fuel-markup--insert-button label link type)))
338 (defun fuel-markup--links (e sep)
339 "Inserts a sequence of links. Used for rendering see also lists
340 and breadcrumb navigation. The items in e can either be strings
342 (let ((links (cdr e)))
345 (message (format "link %s" link))
351 (delete-char (- (length sep))))))
353 (defun fuel-markup--index-quotation (q)
355 ((listp q) (vconcat (mapcar 'fuel-markup--index-quotation q)))
358 (defun fuel-markup--index (e)
359 (let* ((q (fuel-markup--index-quotation (cadr e)))
360 (cmd `(:fuel* ((,q fuel-index)) "fuel"
361 ("assocs" "builtins" "classes" "classes.builtin"
362 "classes.intersection" "classes.predicate"
363 "classes.singleton" "classes.tuple" "classes.union"
364 "help" "help.topics" "namespaces" "sequences"
366 (subs (fuel-eval--retort-result (fuel-eval--send/wait cmd 200))))
368 (let ((start (point))
369 (sort-fold-case nil))
370 (fuel-markup--print subs)
371 (sort-lines nil start (point))))))
373 (defun fuel-markup--vocab-link (e)
374 (fuel-markup--insert-button (cadr e) (or (car (cddr e)) (cadr e)) 'vocab))
376 (defun fuel-markup--vocab-links (e)
377 (dolist (link (cdr e))
379 (fuel-markup--vocab-link (list '$vocab-link link))
382 (defun fuel-markup--vocab-list (e)
383 (let ((rows (mapcar #'(lambda (elem)
384 (list (list '$vocab-link (car elem))
387 (fuel-markup--table (cons '$table rows))))
389 (defun fuel-markup--vocab (e)
390 (fuel-markup--insert-nl-if-nb)
391 (let* ((cmd `(:fuel* ((,(cadr e) fuel-vocab-help)) "fuel" t))
392 (res (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
393 (when res (fuel-markup--print res))))
395 (defun fuel-markup--parse-classes ()
397 (while (looking-at ".+ classes$")
398 (let ((heading `($heading ,(match-string-no-properties 0)))
401 (when (looking-at "Class *.+$")
402 (push (split-string (match-string-no-properties 0) nil t) rows)
404 (while (not (looking-at "$"))
405 (let* ((objs (split-string (thing-at-point 'line) nil t))
406 (class (list '$link (car objs) (car objs) 'word))
407 (super (and (cadr objs)
408 (list (list '$link (cadr objs) (cadr objs) 'word))))
409 (slots (when (cddr objs)
410 (list (mapcar #'(lambda (s) (list s " ")) (cddr objs))))))
411 (push `(,class ,@super ,@slots) rows))
413 (push `(,heading ($table ,@(reverse rows))) elems))
417 (defun fuel-markup--parse-words ()
419 (while (looking-at ".+ words\\|Primitives$")
420 (let ((heading `($heading ,(match-string-no-properties 0)))
423 (when (looking-at "Word *\\(Stack effect\\|Syntax\\)$")
424 (push (list "Word" (match-string-no-properties 1)) rows)
426 (while (looking-at " ?\\(.+?\\)\\( +\\(.+\\)\\)?$")
427 (let ((word `($link ,(match-string-no-properties 1)
428 ,(match-string-no-properties 1)
430 (se (and (match-string-no-properties 3)
431 `(($snippet ,(match-string-no-properties 3))))))
432 (push `(,word ,@se) rows))
434 (push `(,heading ($table ,@(reverse rows))) elems))
438 (defun fuel-markup--parse-words-desc (desc)
439 "This function parses the text description of the vocab that
440 the 'words.' word emits."
443 (goto-char (point-min))
444 (when (re-search-forward "^Words$" nil t)
446 (let ((elems '(($heading "Words"))))
447 (push (fuel-markup--parse-classes) elems)
448 (push (fuel-markup--parse-words) elems)
449 (reverse (remove nil elems))))))
451 (defun fuel-markup--describe-words (e)
453 (fuel-markup--print (fuel-markup--parse-words-desc (cadr e)))))
455 (defun fuel-markup--tag (e)
456 (fuel-markup--link (list '$link (cadr e) (cadr e) 'tag)))
458 (defun fuel-markup--tags (e)
460 (fuel-markup--insert-heading "Tags: " t)
461 (dolist (tag (cdr e))
462 (fuel-markup--tag (list '$tag tag))
465 (fuel-markup--insert-newline)))
467 (defun fuel-markup--all-tags (e)
468 (let* ((cmd `(:fuel* (all-tags) "fuel" t))
469 (tags (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
471 (cons '$list (mapcar (lambda (tag) (list '$link tag tag 'tag)) tags)))))
473 (defun fuel-markup--author (e)
474 (fuel-markup--link (list '$link (cadr e) (cadr e) 'author)))
476 (defun fuel-markup--authors (e)
478 (fuel-markup--insert-heading "Authors: " t)
480 (fuel-markup--author (list '$author a))
483 (fuel-markup--insert-newline)))
485 (defun fuel-markup--all-authors (e)
486 (let* ((cmd `(:fuel* (all-authors) "fuel" t))
487 (authors (fuel-eval--retort-result (fuel-eval--send/wait cmd))))
489 (cons '$list (mapcar (lambda (a) (list '$link a a 'author)) authors)))))
491 (defun fuel-markup--list (e)
492 (fuel-markup--insert-nl-if-nb)
493 (dolist (elt (cdr e))
495 (fuel-markup--print elt)
496 (fuel-markup--insert-newline)))
498 (defun fuel-markup--table (e)
499 (fuel-markup--insert-newline)
503 (mapcar #'(lambda (row) (mapcar 'fuel-markup--print-str row)) (cdr e)))
506 (defun fuel-markup--instance (e)
507 (insert " an instance of ")
508 (fuel-markup--print (cadr e)))
510 (defun fuel-markup--maybe (e)
511 (fuel-markup--instance (cons '$instance (cdr e)))
514 (defun fuel-markup--sequence (e)
516 (fuel-markup--link (list '$link 'sequence 'sequence 'word))
518 (fuel-markup--print (cadr e))
521 (defun fuel-markup--or (e)
522 (let ((fst (car (cdr e)))
523 (mid (butlast (cddr e)))
524 (lst (car (last (cdr e)))))
525 (insert (format "%s" fst))
526 (dolist (m mid) (insert (format ", %s" m)))
527 (insert (format " or %s" lst))))
529 (defun fuel-markup--values (e)
530 (fuel-markup--insert-heading "Inputs and outputs")
531 (dolist (val (cdr e))
532 (insert " " (car val) " - ")
533 (fuel-markup--print (cdr val))
536 (defun fuel-markup--predicate (e)
537 (fuel-markup--values '($values ("object" object) ("?" "a boolean")))
538 (let ((word (make-symbol (substring (format "%s" (cadr e)) 0 -1))))
539 (fuel-markup--description
540 `($description "Tests if the object is an instance of the "
541 ($link ,word) " class."))))
543 (defun fuel-markup--side-effects (e)
544 (fuel-markup--insert-heading "Side effects")
546 (fuel-markup--print (cdr e))
547 (fuel-markup--insert-newline))
549 (defun fuel-markup--definition (e)
550 (fuel-markup--insert-heading "Definition")
551 (fuel-markup--code (cons '$code (cdr e)) nil))
553 (defun fuel-markup--methods (e)
554 (fuel-markup--insert-heading "Methods")
555 (fuel-markup--code (cons '$code (cdr e)) nil))
557 (defun fuel-markup--value (e)
558 (fuel-markup--insert-heading "Variable value")
559 (insert "Current value in global namespace: ")
560 (fuel-markup--snippet (cons '$snippet (cdr e)))
563 (defun fuel-markup--values-x/y (e)
564 (fuel-markup--values '($values ("x" "number") ("y" "number"))))
566 (defun fuel-markup--curious (e)
567 (fuel-markup--insert-heading "For the curious...")
568 (fuel-markup--print (cdr e)))
570 (defun fuel-markup--references (e)
571 (fuel-markup--insert-heading "References")
572 (dolist (ref (cdr e))
574 (fuel-markup--print ref)
575 (fuel-markup--subsection (list '$subsection ref)))))
577 (defun fuel-markup--see-also (e)
578 (fuel-markup--insert-heading "See also")
579 (fuel-markup--links (cons '$links (cdr e)) ", "))
581 (defun fuel-markup--related (e)
582 (fuel-markup--insert-heading "See also")
583 (fuel-markup--links (cons '$links (cadr e)) ", "))
585 (defun fuel-markup--shuffle (e)
586 (insert "\nShuffle word. Re-arranges the stack "
587 "according to the stack effect pattern.")
588 (fuel-markup--insert-newline))
590 (defun fuel-markup--low-level-note (e)
591 (fuel-markup--print '($notes "Calling this word directly is not necessary "
593 "Higher-level words call it automatically.")))
595 (defun fuel-markup--parsing-note (e)
596 (fuel-markup--insert-nl-if-nb)
597 (insert "This word should only be called from parsing words.")
598 (fuel-markup--insert-newline))
600 (defun fuel-markup--io-error (e)
601 (fuel-markup--errors '($errors "Throws an error if the I/O operation fails.")))
603 (defun fuel-markup--prettyprinting-note (e)
604 (fuel-markup--print '($notes ("This word should only be called within the "
605 ($link with-pprint) " combinator."))))
607 (defun fuel-markup--prefixed-link (prefix e)
608 (insert (format " %s " prefix))
609 (fuel-markup--link e)
612 (defun fuel-markup--elem-with-heading (elem heading)
613 (fuel-markup--insert-heading heading)
614 (fuel-markup--print (cdr elem))
615 (fuel-markup--insert-newline))
617 (defun fuel-markup--stack-effect (e)
618 (let* ((in (mapconcat 'identity (nth 1 e) " "))
619 (out (mapconcat 'identity (nth 2 e) " "))
620 (str (format "( %s -- %s )" in out)))
621 (fuel-markup--snippet (list '$snippet str))))
623 (defun fuel-markup--quotation (e)
625 (fuel-markup--link (list '$link 'quotation 'quotation 'word))
626 (insert " with stack effect ")
627 (fuel-markup--stack-effect (nth 1 e)))
629 (defun fuel-markup--warning (e)
630 (fuel-markup--elem-with-heading e "Warning"))
632 (defun fuel-markup--description (e)
633 (fuel-markup--elem-with-heading e "Word description"))
635 (defun fuel-markup--class-description (e)
636 (fuel-markup--elem-with-heading e "Class description"))
638 (defun fuel-markup--error-description (e)
639 (fuel-markup--elem-with-heading e "Error description"))
641 (defun fuel-markup--var-description (e)
642 (fuel-markup--elem-with-heading e "Variable description"))
644 (defun fuel-markup--contract (e)
645 (fuel-markup--elem-with-heading e "Generic word contract"))
647 (defun fuel-markup--errors (e)
648 (fuel-markup--elem-with-heading e "Errors"))
650 (defun fuel-markup--examples (e)
651 (fuel-markup--elem-with-heading e "Examples"))
653 (defun fuel-markup--notes (e)
654 (fuel-markup--elem-with-heading e "Notes"))
656 (defun fuel-markup--word-info (e)
657 "Uses the 'see' word to lookup info about a given word. Note
658 that this function is called in contexts where it is impossible
659 to guess the correct usings, so a static using list is used."
660 (let* ((word (nth 1 e))
661 (cmd `(:fuel* ((:quote ,(symbol-name word)) see)
662 "fuel" ("kernel" "lexer" "see" "sequences")))
663 (ret (and cmd (fuel-eval--send/wait cmd)))
664 (res (and (not (fuel-eval--retort-error ret))
665 (fuel-eval--retort-output ret))))
667 (fuel-markup--code (list '$code res) nil)
668 (fuel-markup--snippet (list '$snippet " " word)))))
670 (defun fuel-markup--null (e))
673 (provide 'fuel-markup)
675 ;;; fuel-markup.el ends here