1(*  Title:      Pure/PIDE/markup.ML
2    Author:     Makarius
3
4Quasi-abstract markup elements.
5*)
6
7signature MARKUP =
8sig
9  type T = string * Properties.T
10  val empty: T
11  val is_empty: T -> bool
12  val properties: Properties.T -> T -> T
13  val nameN: string
14  val name: string -> T -> T
15  val kindN: string
16  val serialN: string
17  val serial_properties: int -> Properties.T
18  val instanceN: string
19  val languageN: string
20  val symbolsN: string
21  val delimitedN: string
22  val is_delimited: Properties.T -> bool
23  val language: {name: string, symbols: bool, antiquotes: bool, delimited: bool} -> T
24  val language': {name: string, symbols: bool, antiquotes: bool} -> bool -> T
25  val language_Isar: bool -> T
26  val language_method: T
27  val language_attribute: T
28  val language_sort: bool -> T
29  val language_type: bool -> T
30  val language_term: bool -> T
31  val language_prop: bool -> T
32  val language_ML: bool -> T
33  val language_SML: bool -> T
34  val language_document: bool -> T
35  val language_antiquotation: T
36  val language_text: bool -> T
37  val language_verbatim: bool -> T
38  val language_latex: bool -> T
39  val language_rail: T
40  val language_path: T
41  val language_mixfix: T
42  val bindingN: string val binding: T
43  val entityN: string val entity: string -> string -> T
44  val get_entity_kind: T -> string option
45  val defN: string
46  val refN: string
47  val completionN: string val completion: T
48  val no_completionN: string val no_completion: T
49  val lineN: string
50  val end_lineN: string
51  val offsetN: string
52  val end_offsetN: string
53  val fileN: string
54  val idN: string
55  val position_properties': string list
56  val position_properties: string list
57  val positionN: string val position: T
58  val expressionN: string val expression: string -> T
59  val citationN: string val citation: string -> T
60  val pathN: string val path: string -> T
61  val urlN: string val url: string -> T
62  val docN: string val doc: string -> T
63  val markupN: string
64  val consistentN: string
65  val unbreakableN: string
66  val block_properties: string list
67  val indentN: string
68  val widthN: string
69  val blockN: string val block: bool -> int -> T
70  val breakN: string val break: int -> int -> T
71  val fbreakN: string val fbreak: T
72  val itemN: string val item: T
73  val wordsN: string val words: T
74  val no_wordsN: string val no_words: T
75  val hiddenN: string val hidden: T
76  val deleteN: string val delete: T
77  val system_optionN: string
78  val sessionN: string
79  val theoryN: string
80  val classN: string
81  val type_nameN: string
82  val constantN: string
83  val fixedN: string val fixed: string -> T
84  val caseN: string val case_: string -> T
85  val dynamic_factN: string val dynamic_fact: string -> T
86  val literal_factN: string val literal_fact: string -> T
87  val method_modifierN: string
88  val tfreeN: string val tfree: T
89  val tvarN: string val tvar: T
90  val freeN: string val free: T
91  val skolemN: string val skolem: T
92  val boundN: string val bound: T
93  val varN: string val var: T
94  val numeralN: string val numeral: T
95  val literalN: string val literal: T
96  val delimiterN: string val delimiter: T
97  val inner_stringN: string val inner_string: T
98  val inner_cartoucheN: string val inner_cartouche: T
99  val inner_commentN: string val inner_comment: T
100  val token_rangeN: string val token_range: T
101  val sortingN: string val sorting: T
102  val typingN: string val typing: T
103  val class_parameterN: string val class_parameter: T
104  val ML_keyword1N: string val ML_keyword1: T
105  val ML_keyword2N: string val ML_keyword2: T
106  val ML_keyword3N: string val ML_keyword3: T
107  val ML_delimiterN: string val ML_delimiter: T
108  val ML_tvarN: string val ML_tvar: T
109  val ML_numeralN: string val ML_numeral: T
110  val ML_charN: string val ML_char: T
111  val ML_stringN: string val ML_string: T
112  val ML_commentN: string val ML_comment: T
113  val SML_stringN: string val SML_string: T
114  val SML_commentN: string val SML_comment: T
115  val ML_defN: string
116  val ML_openN: string
117  val ML_structureN: string
118  val ML_typingN: string val ML_typing: T
119  val ML_breakpointN: string val ML_breakpoint: int -> T
120  val antiquotedN: string val antiquoted: T
121  val antiquoteN: string val antiquote: T
122  val ML_antiquotationN: string
123  val document_antiquotationN: string
124  val document_antiquotation_optionN: string
125  val paragraphN: string val paragraph: T
126  val text_foldN: string val text_fold: T
127  val markdown_paragraphN: string val markdown_paragraph: T
128  val markdown_itemN: string val markdown_item: T
129  val markdown_bulletN: string val markdown_bullet: int -> T
130  val markdown_listN: string val markdown_list: string -> T
131  val itemizeN: string
132  val enumerateN: string
133  val descriptionN: string
134  val inputN: string val input: bool -> Properties.T -> T
135  val command_keywordN: string val command_keyword: T
136  val commandN: string val command_properties: T -> T
137  val keywordN: string val keyword_properties: T -> T
138  val stringN: string val string: T
139  val alt_stringN: string val alt_string: T
140  val verbatimN: string val verbatim: T
141  val cartoucheN: string val cartouche: T
142  val commentN: string val comment: T
143  val keyword1N: string val keyword1: T
144  val keyword2N: string val keyword2: T
145  val keyword3N: string val keyword3: T
146  val quasi_keywordN: string val quasi_keyword: T
147  val improperN: string val improper: T
148  val operatorN: string val operator: T
149  val elapsedN: string
150  val cpuN: string
151  val gcN: string
152  val timing_properties: {elapsed: Time.time, cpu: Time.time, gc: Time.time} -> Properties.T
153  val parse_timing_properties: Properties.T -> {elapsed: Time.time, cpu: Time.time, gc: Time.time}
154  val command_timingN: string
155  val command_timing_properties:
156    {file: string, offset: int, name: string} -> Time.time -> Properties.T
157  val parse_command_timing_properties:
158    Properties.T -> ({file: string, offset: int, name: string} * Time.time) option
159  val timingN: string val timing: {elapsed: Time.time, cpu: Time.time, gc: Time.time} -> T
160  val command_indentN: string val command_indent: int -> T
161  val goalN: string val goal: T
162  val subgoalN: string val subgoal: string -> T
163  val taskN: string
164  val acceptedN: string val accepted: T
165  val forkedN: string val forked: T
166  val joinedN: string val joined: T
167  val runningN: string val running: T
168  val finishedN: string val finished: T
169  val failedN: string val failed: T
170  val initializedN: string val initialized: T
171  val consolidatedN: string val consolidated: T
172  val exec_idN: string
173  val initN: string
174  val statusN: string val status: T
175  val resultN: string val result: T
176  val writelnN: string val writeln: T
177  val stateN: string val state: T
178  val informationN: string val information: T
179  val tracingN: string val tracing: T
180  val warningN: string val warning: T
181  val legacyN: string val legacy: T
182  val errorN: string val error: T
183  val systemN: string val system: T
184  val protocolN: string
185  val reportN: string val report: T
186  val no_reportN: string val no_report: T
187  val badN: string val bad: unit -> T
188  val intensifyN: string val intensify: T
189  val browserN: string
190  val graphviewN: string
191  val sendbackN: string
192  val paddingN: string
193  val padding_line: Properties.entry
194  val padding_command: Properties.entry
195  val dialogN: string val dialog: serial -> string -> T
196  val jedit_actionN: string
197  val functionN: string
198  val assign_update: Properties.T
199  val removed_versions: Properties.T
200  val protocol_handler: string -> Properties.T
201  val invoke_scala: string -> string -> Properties.T
202  val cancel_scala: string -> Properties.T
203  val ML_statistics: Properties.entry
204  val task_statistics: Properties.entry
205  val command_timing: Properties.entry
206  val theory_timing: Properties.entry
207  val exportN: string
208  type export_args =
209    {id: string option, serial: serial, theory_name: string, name: string, compress: bool}
210  val export: export_args -> Properties.T
211  val loading_theory: string -> Properties.T
212  val dest_loading_theory: Properties.T -> string option
213  val build_session_finished: Properties.T
214  val print_operationsN: string
215  val print_operations: Properties.T
216  val debugger_state: string -> Properties.T
217  val debugger_output: string -> Properties.T
218  val simp_trace_panelN: string
219  val simp_trace_logN: string
220  val simp_trace_stepN: string
221  val simp_trace_recurseN: string
222  val simp_trace_hintN: string
223  val simp_trace_ignoreN: string
224  val simp_trace_cancel: serial -> Properties.T
225  val no_output: Output.output * Output.output
226  val add_mode: string -> (T -> Output.output * Output.output) -> unit
227  val output: T -> Output.output * Output.output
228  val enclose: T -> Output.output -> Output.output
229  val markup: T -> string -> string
230  val markups: T list -> string -> string
231  val markup_only: T -> string
232  val markup_report: string -> string
233end;
234
235structure Markup: MARKUP =
236struct
237
238(** markup elements **)
239
240(* basic markup *)
241
242type T = string * Properties.T;
243
244val empty = ("", []);
245
246fun is_empty ("", _) = true
247  | is_empty _ = false;
248
249
250fun properties more_props ((elem, props): T) =
251  (elem, fold_rev Properties.put more_props props);
252
253fun markup_elem name = (name, (name, []): T);
254fun markup_string name prop = (name, fn s => (name, [(prop, s)]): T);
255fun markup_int name prop = (name, fn i => (name, [(prop, Value.print_int i)]): T);
256
257
258(* misc properties *)
259
260val nameN = "name";
261fun name a = properties [(nameN, a)];
262
263val kindN = "kind";
264
265val serialN = "serial";
266fun serial_properties i = [(serialN, Value.print_int i)];
267
268val instanceN = "instance";
269
270
271(* embedded languages *)
272
273val languageN = "language";
274val symbolsN = "symbols";
275val antiquotesN = "antiquotes";
276val delimitedN = "delimited"
277
278fun is_delimited props =
279  Properties.get props delimitedN = SOME "true";
280
281fun language {name, symbols, antiquotes, delimited} =
282  (languageN,
283   [(nameN, name),
284    (symbolsN, Value.print_bool symbols),
285    (antiquotesN, Value.print_bool antiquotes),
286    (delimitedN, Value.print_bool delimited)]);
287
288fun language' {name, symbols, antiquotes} delimited =
289  language {name = name, symbols = symbols, antiquotes = antiquotes, delimited = delimited};
290
291val language_Isar = language' {name = "Isar", symbols = true, antiquotes = false};
292val language_method =
293  language {name = "method", symbols = true, antiquotes = false, delimited = false};
294val language_attribute =
295  language {name = "attribute", symbols = true, antiquotes = false, delimited = false};
296val language_sort = language' {name = "sort", symbols = true, antiquotes = false};
297val language_type = language' {name = "type", symbols = true, antiquotes = false};
298val language_term = language' {name = "term", symbols = true, antiquotes = false};
299val language_prop = language' {name = "prop", symbols = true, antiquotes = false};
300val language_ML = language' {name = "ML", symbols = false, antiquotes = true};
301val language_SML = language' {name = "SML", symbols = false, antiquotes = false};
302val language_document = language' {name = "document", symbols = false, antiquotes = true};
303val language_antiquotation =
304  language {name = "antiquotation", symbols = true, antiquotes = false, delimited = true};
305val language_text = language' {name = "text", symbols = true, antiquotes = false};
306val language_verbatim = language' {name = "verbatim_text", symbols = true, antiquotes = false};
307val language_latex = language' {name = "latex", symbols = false, antiquotes = false};
308val language_rail = language {name = "rail", symbols = true, antiquotes = true, delimited = true};
309val language_path = language {name = "path", symbols = false, antiquotes = false, delimited = true};
310val language_mixfix =
311  language {name = "mixfix_annotation", symbols = true, antiquotes = false, delimited = true};
312
313
314(* formal entities *)
315
316val (bindingN, binding) = markup_elem "binding";
317
318val entityN = "entity";
319fun entity kind name =
320  (entityN,
321    (if name = "" then [] else [(nameN, name)]) @ (if kind = "" then [] else [(kindN, kind)]));
322
323fun get_entity_kind (name, props) =
324  if name = entityN then Properties.get props kindN
325  else NONE;
326
327val defN = "def";
328val refN = "ref";
329
330
331(* completion *)
332
333val (completionN, completion) = markup_elem "completion";
334val (no_completionN, no_completion) = markup_elem "no_completion";
335
336
337(* position *)
338
339val lineN = "line";
340val end_lineN = "end_line";
341
342val offsetN = "offset";
343val end_offsetN = "end_offset";
344
345val fileN = "file";
346val idN = "id";
347
348val position_properties' = [fileN, idN];
349val position_properties = [lineN, offsetN, end_offsetN] @ position_properties';
350
351val (positionN, position) = markup_elem "position";
352
353
354(* expression *)
355
356val expressionN = "expression";
357fun expression kind = (expressionN, if kind = "" then [] else [(kindN, kind)]);
358
359
360(* citation *)
361
362val (citationN, citation) = markup_string "citation" nameN;
363
364
365(* external resources *)
366
367val (pathN, path) = markup_string "path" nameN;
368val (urlN, url) = markup_string "url" nameN;
369val (docN, doc) = markup_string "doc" nameN;
370
371
372(* pretty printing *)
373
374val markupN = "markup";
375val consistentN = "consistent";
376val unbreakableN = "unbreakable";
377val indentN = "indent";
378
379val block_properties = [markupN, consistentN, unbreakableN, indentN];
380
381val widthN = "width";
382
383val blockN = "block";
384fun block c i =
385  (blockN,
386    (if c then [(consistentN, Value.print_bool c)] else []) @
387    (if i <> 0 then [(indentN, Value.print_int i)] else []));
388
389val breakN = "break";
390fun break w i =
391  (breakN,
392    (if w <> 0 then [(widthN, Value.print_int w)] else []) @
393    (if i <> 0 then [(indentN, Value.print_int i)] else []));
394
395val (fbreakN, fbreak) = markup_elem "fbreak";
396
397val (itemN, item) = markup_elem "item";
398
399
400(* text properties *)
401
402val (wordsN, words) = markup_elem "words";
403val (no_wordsN, no_words) = markup_elem "no_words";
404
405val (hiddenN, hidden) = markup_elem "hidden";
406
407val (deleteN, delete) = markup_elem "delete";
408
409
410(* misc entities *)
411
412val system_optionN = "system_option";
413
414val sessionN = "session";
415
416val theoryN = "theory";
417val classN = "class";
418val type_nameN = "type_name";
419val constantN = "constant";
420
421val (fixedN, fixed) = markup_string "fixed" nameN;
422val (caseN, case_) = markup_string "case" nameN;
423val (dynamic_factN, dynamic_fact) = markup_string "dynamic_fact" nameN;
424val (literal_factN, literal_fact) = markup_string "literal_fact" nameN;
425
426val method_modifierN = "method_modifier";
427
428
429(* inner syntax *)
430
431val (tfreeN, tfree) = markup_elem "tfree";
432val (tvarN, tvar) = markup_elem "tvar";
433val (freeN, free) = markup_elem "free";
434val (skolemN, skolem) = markup_elem "skolem";
435val (boundN, bound) = markup_elem "bound";
436val (varN, var) = markup_elem "var";
437val (numeralN, numeral) = markup_elem "numeral";
438val (literalN, literal) = markup_elem "literal";
439val (delimiterN, delimiter) = markup_elem "delimiter";
440val (inner_stringN, inner_string) = markup_elem "inner_string";
441val (inner_cartoucheN, inner_cartouche) = markup_elem "inner_cartouche";
442val (inner_commentN, inner_comment) = markup_elem "inner_comment";
443
444val (token_rangeN, token_range) = markup_elem "token_range";
445
446val (sortingN, sorting) = markup_elem "sorting";
447val (typingN, typing) = markup_elem "typing";
448val (class_parameterN, class_parameter) = markup_elem "class_parameter";
449
450
451(* ML *)
452
453val (ML_keyword1N, ML_keyword1) = markup_elem "ML_keyword1";
454val (ML_keyword2N, ML_keyword2) = markup_elem "ML_keyword2";
455val (ML_keyword3N, ML_keyword3) = markup_elem "ML_keyword3";
456val (ML_delimiterN, ML_delimiter) = markup_elem "ML_delimiter";
457val (ML_tvarN, ML_tvar) = markup_elem "ML_tvar";
458val (ML_numeralN, ML_numeral) = markup_elem "ML_numeral";
459val (ML_charN, ML_char) = markup_elem "ML_char";
460val (ML_stringN, ML_string) = markup_elem "ML_string";
461val (ML_commentN, ML_comment) = markup_elem "ML_comment";
462val (SML_stringN, SML_string) = markup_elem "SML_string";
463val (SML_commentN, SML_comment) = markup_elem "SML_comment";
464
465val ML_defN = "ML_def";
466val ML_openN = "ML_open";
467val ML_structureN = "ML_structure";
468val (ML_typingN, ML_typing) = markup_elem "ML_typing";
469
470val (ML_breakpointN, ML_breakpoint) = markup_int "ML_breakpoint" serialN;
471
472
473(* antiquotations *)
474
475val (antiquotedN, antiquoted) = markup_elem "antiquoted";
476val (antiquoteN, antiquote) = markup_elem "antiquote";
477
478val ML_antiquotationN = "ML_antiquotation";
479val document_antiquotationN = "document_antiquotation";
480val document_antiquotation_optionN = "document_antiquotation_option";
481
482
483(* text structure *)
484
485val (paragraphN, paragraph) = markup_elem "paragraph";
486val (text_foldN, text_fold) = markup_elem "text_fold";
487
488
489(* Markdown document structure *)
490
491val (markdown_paragraphN, markdown_paragraph) = markup_elem "markdown_paragraph";
492val (markdown_itemN, markdown_item) = markup_elem "markdown_item";
493val (markdown_bulletN, markdown_bullet) = markup_int "markdown_bullet" "depth";
494val (markdown_listN, markdown_list) = markup_string "markdown_list" kindN;
495
496val itemizeN = "itemize";
497val enumerateN = "enumerate";
498val descriptionN = "description";
499
500
501(* formal input *)
502
503val inputN = "input";
504fun input delimited props = (inputN, (delimitedN, Value.print_bool delimited) :: props);
505
506
507(* outer syntax *)
508
509val (command_keywordN, command_keyword) = markup_elem "command_keyword";
510
511val commandN = "command"; val command_properties = properties [(kindN, commandN)];
512val keywordN = "keyword"; val keyword_properties = properties [(kindN, keywordN)];
513
514val (keyword1N, keyword1) = markup_elem "keyword1";
515val (keyword2N, keyword2) = markup_elem "keyword2";
516val (keyword3N, keyword3) = markup_elem "keyword3";
517val (quasi_keywordN, quasi_keyword) = markup_elem "quasi_keyword";
518val (improperN, improper) = markup_elem "improper";
519val (operatorN, operator) = markup_elem "operator";
520val (stringN, string) = markup_elem "string";
521val (alt_stringN, alt_string) = markup_elem "alt_string";
522val (verbatimN, verbatim) = markup_elem "verbatim";
523val (cartoucheN, cartouche) = markup_elem "cartouche";
524val (commentN, comment) = markup_elem "comment";
525
526
527(* timing *)
528
529val elapsedN = "elapsed";
530val cpuN = "cpu";
531val gcN = "gc";
532
533fun timing_properties {elapsed, cpu, gc} =
534 [(elapsedN, Value.print_time elapsed),
535  (cpuN, Value.print_time cpu),
536  (gcN, Value.print_time gc)];
537
538fun parse_timing_properties props =
539 {elapsed = Properties.seconds props elapsedN,
540  cpu = Properties.seconds props cpuN,
541  gc = Properties.seconds props gcN};
542
543val timingN = "timing";
544fun timing t = (timingN, timing_properties t);
545
546
547(* command timing *)
548
549val command_timingN = "command_timing";
550
551fun command_timing_properties {file, offset, name} elapsed =
552 [(fileN, file), (offsetN, Value.print_int offset),
553  (nameN, name), (elapsedN, Value.print_time elapsed)];
554
555fun parse_command_timing_properties props =
556  (case (Properties.get props fileN, Properties.get props offsetN, Properties.get props nameN) of
557    (SOME file, SOME offset, SOME name) =>
558      SOME ({file = file, offset = Value.parse_int offset, name = name},
559        Properties.seconds props elapsedN)
560  | _ => NONE);
561
562
563(* indentation *)
564
565val (command_indentN, command_indent) = markup_int "command_indent" indentN;
566
567
568(* goals *)
569
570val (goalN, goal) = markup_elem "goal";
571val (subgoalN, subgoal) = markup_string "subgoal" nameN;
572
573
574(* command status *)
575
576val taskN = "task";
577
578val (acceptedN, accepted) = markup_elem "accepted";
579val (forkedN, forked) = markup_elem "forked";
580val (joinedN, joined) = markup_elem "joined";
581val (runningN, running) = markup_elem "running";
582val (finishedN, finished) = markup_elem "finished";
583val (failedN, failed) = markup_elem "failed";
584
585val (initializedN, initialized) = markup_elem "initialized";
586val (consolidatedN, consolidated) = markup_elem "consolidated";
587
588
589(* messages *)
590
591val exec_idN = "exec_id";
592
593val initN = "init";
594val (statusN, status) = markup_elem "status";
595val (resultN, result) = markup_elem "result";
596val (writelnN, writeln) = markup_elem "writeln";
597val (stateN, state) = markup_elem "state"
598val (informationN, information) = markup_elem "information";
599val (tracingN, tracing) = markup_elem "tracing";
600val (warningN, warning) = markup_elem "warning";
601val (legacyN, legacy) = markup_elem "legacy";
602val (errorN, error) = markup_elem "error";
603val (systemN, system) = markup_elem "system";
604val protocolN = "protocol";
605
606val (reportN, report) = markup_elem "report";
607val (no_reportN, no_report) = markup_elem "no_report";
608
609val badN = "bad";
610fun bad () = (badN, serial_properties (serial ()));
611
612val (intensifyN, intensify) = markup_elem "intensify";
613
614
615(* active areas *)
616
617val browserN = "browser"
618val graphviewN = "graphview";
619
620val sendbackN = "sendback";
621val paddingN = "padding";
622val padding_line = (paddingN, "line");
623val padding_command = (paddingN, "command");
624
625val dialogN = "dialog";
626fun dialog i result = (dialogN, [(serialN, Value.print_int i), (resultN, result)]);
627
628val jedit_actionN = "jedit_action";
629
630
631(* protocol message functions *)
632
633val functionN = "function"
634
635val assign_update = [(functionN, "assign_update")];
636val removed_versions = [(functionN, "removed_versions")];
637
638fun protocol_handler name = [(functionN, "protocol_handler"), (nameN, name)];
639
640fun invoke_scala name id = [(functionN, "invoke_scala"), (nameN, name), (idN, id)];
641fun cancel_scala id = [(functionN, "cancel_scala"), (idN, id)];
642
643val ML_statistics = (functionN, "ML_statistics");
644
645val task_statistics = (functionN, "task_statistics");
646
647val command_timing = (functionN, "command_timing");
648
649val theory_timing = (functionN, "theory_timing");
650
651val exportN = "export";
652type export_args =
653  {id: string option, serial: serial, theory_name: string, name: string, compress: bool}
654fun export ({id, serial, theory_name, name, compress}: export_args) =
655  [(functionN, exportN), (idN, the_default "" id), (serialN, Value.print_int serial),
656    ("theory_name", theory_name), (nameN, name), ("compress", Value.print_bool compress)];
657
658fun loading_theory name = [("function", "loading_theory"), ("name", name)];
659
660fun dest_loading_theory [("function", "loading_theory"), ("name", name)] = SOME name
661  | dest_loading_theory _ = NONE;
662
663val build_session_finished = [("function", "build_session_finished")];
664
665val print_operationsN = "print_operations";
666val print_operations = [(functionN, print_operationsN)];
667
668
669(* debugger *)
670
671fun debugger_state name = [(functionN, "debugger_state"), (nameN, name)];
672fun debugger_output name = [(functionN, "debugger_output"), (nameN, name)];
673
674
675(* simplifier trace *)
676
677val simp_trace_panelN = "simp_trace_panel";
678
679val simp_trace_logN = "simp_trace_log";
680val simp_trace_stepN = "simp_trace_step";
681val simp_trace_recurseN = "simp_trace_recurse";
682val simp_trace_hintN = "simp_trace_hint";
683val simp_trace_ignoreN = "simp_trace_ignore";
684
685fun simp_trace_cancel i = [(functionN, "simp_trace_cancel"), (serialN, Value.print_int i)];
686
687
688
689(** print mode operations **)
690
691val no_output = ("", "");
692
693local
694  val default = {output = Output_Primitives.markup_fn};
695  val modes = Synchronized.var "Markup.modes" (Symtab.make [("", default)]);
696in
697  fun add_mode name output =
698    Synchronized.change modes (fn tab =>
699      (if not (Symtab.defined tab name) then ()
700       else Output.warning ("Redefining markup mode " ^ quote name);
701       Symtab.update (name, {output = output}) tab));
702  fun get_mode () =
703    the_default default
704      (Library.get_first (Symtab.lookup (Synchronized.value modes)) (print_mode_value ()));
705end;
706
707fun output m = if is_empty m then no_output else #output (get_mode ()) m;
708
709val enclose = output #-> Library.enclose;
710
711fun markup m =
712  let val (bg, en) = output m
713  in Library.enclose (Output.escape bg) (Output.escape en) end;
714
715val markups = fold_rev markup;
716
717fun markup_only m = markup m "";
718
719fun markup_report "" = ""
720  | markup_report txt = markup report txt;
721
722end;
723