summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/context/base/mkiv/strc-bkm.lua
blob: ee9233a9ae668fb4cd0726f8695fb9f3cacb08f6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
if not modules then modules = { } end modules ['strc-bkm'] = {
    version   = 0.200,
    comment   = "companion to strc-bkm.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

-- Future version will support adding arbitrary bookmarks with
-- associated complex actions (rather trivial to implement).

-- this should become proper separated backend code

-- we should hook the placement into everystoptext ... needs checking

-- todo: make an lpeg for stripped

local next, type = next, type
local gsub, lower = string.gsub, string.lower
local concat = table.concat
local settings_to_hash = utilities.parsers.settings_to_hash

local trace_bookmarks  = false  trackers.register("references.bookmarks", function(v) trace_bookmarks = v end)
local report_bookmarks = logs.reporter("structure","bookmarks")

local structures     = structures

structures.bookmarks = structures.bookmarks or { }

local bookmarks      = structures.bookmarks
local sections       = structures.sections
local lists          = structures.lists
local levelmap       = sections.levelmap
local variables      = interfaces.variables
local implement      = interfaces.implement
local codeinjections = backends.codeinjections

bookmarks.method     = "internal" -- or "page"

local names          = { }
local opened         = { }
local forced         = { }
local numbered       = { }

function bookmarks.register(settings)
    local force = settings.force == variables.yes
    local number = settings.number == variables.yes
    local allopen = settings.opened == variables.all
    for k, v in next, settings_to_hash(settings.names or "") do
        names[k] = true
        if force then
            forced[k] = true
            if allopen then
                opened[k] = true
            end
        end
        if number then
            numbered[k] = true
        end
    end
    if not allopen then
        for k, v in next, settings_to_hash(settings.opened or "") do
            opened[k] = true
        end
    end
end

function bookmarks.overload(name,text)
    local l, ls = lists.tobesaved, nil
    if #l == 0 then
        -- no entries
    elseif name == "" then
        ls = l[#l]
    else
        for i=#l,0,-1 do
            local li = l[i]
            local metadata = li.metadata
            if metadata and not metadata.nolist and metadata.name == name then
                ls = li
                break
            end
        end
    end
    if ls then
        local titledata = ls.titledata
        if titledata then
            titledata.bookmark = text
        end
    end
    -- last resort
 -- context.writetolist({name},text,"")
end

local function stripped(str) -- kind of generic
    str = gsub(str,"\\([A-Z]+)","%1")            -- \LOGO
    str = gsub(str,"\\ "," ")                    -- \
    str = gsub(str,"\\([A-Za-z]+) *{(.-)}","%2") -- \bla{...}
    str = gsub(str," +"," ")                     -- spaces
    return str
end

-- todo: collect specs and collect later i.e. multiple places

local numberspec = { }

function bookmarks.setup(spec)
 -- table.merge(numberspec,spec)
    for k, v in next, spec do
        numberspec[k] = v
    end
end

function bookmarks.place()
    if next(names) then
        local levels         = { }
        local noflevels      = 0
        local lastlevel      = 1
        local nofblocks      = #lists.sectionblocks -- always >= 1
        local showblocktitle = toboolean(numberspec.showblocktitle,true)
--         local allsections    = sections.collected
        local allblocks      = sections.sectionblockdata
        for i=1,nofblocks do
            local block     = lists.sectionblocks[i]
            local blockdone = nofblocks == 1
            local list      = lists.filter {
                names     = names,
                criterium = block .. ":all",
                forced    = forced,
            }
            for i=1,#list do
                local li = list[i]
                local metadata = li.metadata
                local name = metadata.name
                if not metadata.nolist or forced[name] then -- and levelmap[name] then
                    local titledata = li.titledata
                    --
                    if not titledata then
                        local userdata = li.userdata
                        if userdata then
                            local first  = userdata.first
                            local second = userdata.second
                            if first then
                                if second then
                                    titledata = { title = first .. " " .. second }
                                else
                                    titledata = { title = first }
                                end
                            elseif second then
                                titledata = { title = second }
                            else
                                -- ignoring (command and so)
                            end
                        end
                    end
                    --
                    if titledata then
                        if not blockdone then
                            if showblocktitle then
                                -- add block entry
                                local blockdata  = allblocks[block]
                                local references = li.references
                                noflevels = noflevels + 1
                                levels[noflevels] = {
                                    level     = 1, -- toplevel
                                    title     = stripped(blockdata.bookmark ~= "" and blockdata.bookmark or block),
                                    reference = references,
                                    opened    = allopen or opened[name], -- same as first entry
                                    realpage  = references and references.realpage or 0, -- handy for later
                                    usedpage  = true,
                                }
                            end
                            blockdone = true
                        end
                        local structural = levelmap[name]
                        lastlevel = structural or lastlevel
                        if nofblocks > 1 then
                            -- we have a block so increase the level
                            lastlevel = lastlevel + 1
                        end
                        local title = titledata.bookmark
                        if not title or title == "" then
                            -- We could typeset the title and then convert it.
                         -- if not structural then
                         --     title = titledata.title or "?")
                         -- else
                                title = titledata.title or "?"
                         -- end
                        end
--                         if numbered[name] then
--                             local sectiondata = allsections[li.references.section]
--                             if sectiondata then
--                                 local numberdata = li.numberdata
--                                 if numberdata and not numberdata.hidenumber then
--                                  -- we could typeset the number and convert it
--                                     local number = sections.typesetnumber(sectiondata,"direct",numberspec,sectiondata)
--                                     if number and #number > 0 then
--                                         title = concat(number) .. " " .. title
--                                     end
--                                 end
--                             end
--                         end
if numbered[name] then
    local numberdata = li.numberdata
    if numberdata and not numberdata.hidenumber then
     -- we could typeset the number and convert it
        local number = sections.typesetnumber(numberdata,"direct",numberspec,numberdata)
        if number and #number > 0 then
            title = concat(number) .. " " .. title
        end
    end
end
                        noflevels = noflevels + 1
                        local references = li.references
                        levels[noflevels] = {
                            level      = lastlevel,
                            title      = stripped(title), -- can be replaced by converter
                            reference  = references,   -- has internal and realpage
                            opened     = allopen or opened[name],
                            realpage   = references and references.realpage or 0, -- handy for later
                            usedpage   = true,
                            structural = structural,
                            name       = name,
                        }
                    end
                end
            end
        end
-- inspect(levels)
        bookmarks.finalize(levels)
        function bookmarks.place() end -- prevent second run
    end
end

function bookmarks.flatten(levels)
    if not levels then
        -- a plugin messed up
        return { }
    end
    -- This function promotes leading structurelements with a higher level
    -- to the next lower level. Such situations are the result of lack of
    -- structure: a subject preceding a chapter in a sectionblock. So, the
    -- following code runs over section blocks as well. (bookmarks-007.tex)
    local noflevels = #levels
    if noflevels > 1 then
        local function showthem()
            for i=1,noflevels do
                local level = levels[i]
             -- if level.structural then
             --     report_bookmarks("%i > %s > %s",level.level,level.reference.block,level.title)
             -- else
                    report_bookmarks("%i > %s > %s > %s",level.level,level.reference.block,level.name,level.title)
             -- end
            end
        end
        if trace_bookmarks then
            report_bookmarks("checking structure")
            showthem()
        end
        local skip  = false
        local done  = 0
        local start = 1
        local one   = levels[1]
        local first = one.level
        local block = one.reference.block
        for i=2,noflevels do
            local current   = levels[i]
            local new       = current.level
            local reference = current.reference
            local newblock  = type(reference) == "table" and current.reference.block or block
            if newblock ~= block then
                first = new
                block = newblock
                start = i
                skip  = false
            elseif skip then
                -- go on
            elseif new > first then
                skip = true
            elseif new < first then
                for j=start,i-1 do
                    local previous = levels[j]
                    local old      = previous.level
                    previous.level = new
                    if trace_bookmarks then
                        report_bookmarks("promoting entry %a from level %a to %a: %s",j,old,new,previous.title)
                    end
                    done = done + 1
                end
                skip = true
            end
        end
        if trace_bookmarks then
            if done > 0 then
                report_bookmarks("%a entries promoted")
                showthem()
            else
                report_bookmarks("nothing promoted")
            end
        end
    end
    return levels
end

local extras = { }
local lists  = { }
local names  = { }

bookmarks.extras = extras

local function cleanname(name)
    return lower(file.basename(name))
end

function extras.register(name,levels)
    if name and levels then
        name = cleanname(name)
        local found = names[name]
        if found then
            lists[found].levels = levels
        else
            lists[#lists+1] = {
                name   = name,
                levels = levels,
            }
            names[name] = #lists
        end
    end
end

function extras.get(name)
    if name then
        local found = names[cleanname(name)]
        if found then
            return lists[found].levels
        end
    else
        return lists
    end
end

function extras.reset(name)
    local l, n = { }, { }
    if name then
        name = cleanname(name)
        for i=1,#lists do
            local li = lists[i]
            local ln = li.name
            if name == ln then
                -- skip
            else
                local m = #l + 1
                l[m]  = li
                n[ln] = m
            end
        end
    end
    lists, names = l, n
end

local function checklists()
    for i=1,#lists do
        local levels = lists[i].levels
        for j=1,#levels do
            local entry     = levels[j]
            local pageindex = entry.pageindex
            if pageindex then
                entry.reference = figures.getrealpage(pageindex)
                entry.pageindex = nil
            end
        end
    end
end

function extras.tosections(levels)
    local sections = { }
    local noflists = #lists
    for i=1,noflists do
        local levels = lists[i].levels
        local data   = { }
        sections[i]  = data
        for j=1,#levels do
            local entry = levels[j]
            if entry.usedpage then
                local section = entry.section
                local d = data[section]
                if d then
                    d[#d+1] = entry
                else
                    data[section] = { entry }
                end
            end
        end
    end
    return sections
end

function extras.mergesections(levels,sections)
    if not sections or #sections == 0 then
        return levels
    elseif not levels then
        return { }
    else
        local merge    = { }
        local noflists = #lists
        if #levels == 0 then
            local level   = 0
            local section = 0
            for i=1,noflists do
                local entries = sections[i][0]
                if entries then
                    for i=1,#entries do
                        local entry = entries[i]
                        merge[#merge+1] = entry
                        entry.level = entry.level + level
                    end
                end
            end
        else
            for j=1,#levels do
                local entry     = levels[j]
                merge[#merge+1] = entry
                local section   = entry.reference.section
                local level     = entry.level
                entry.section   = section -- for tracing
                for i=1,noflists do
                    local entries = sections[i][section]
                    if entries then
                        for i=1,#entries do
                            local entry = entries[i]
                            merge[#merge+1] = entry
                            entry.level = entry.level + level
                        end
                    end
                end
            end
        end
        return merge
    end
end

function bookmarks.merge(levels,mode)
    return extras.mergesections(levels,extras.tosections())
end

local sequencers   = utilities.sequencers
local appendgroup  = sequencers.appendgroup
local appendaction = sequencers.appendaction

local bookmarkactions = sequencers.new {
    arguments    = "levels,method",
    returnvalues = "levels",
    results      = "levels",
}

appendgroup(bookmarkactions,"before") -- user
appendgroup(bookmarkactions,"system") -- private
appendgroup(bookmarkactions,"after" ) -- user

appendaction(bookmarkactions,"system",bookmarks.flatten)
appendaction(bookmarkactions,"system",bookmarks.merge)

function bookmarks.finalize(levels)
    local method = bookmarks.method or "internal"
    checklists() -- so that plugins have the adapted page number
    levels = bookmarkactions.runner(levels,method)
    if levels and #levels > 0 then
        -- normally this is not needed
        local purged = { }
        for i=1,#levels do
            local l = levels[i]
            if l.usedpage ~= false then
                purged[#purged+1] = l
            end
        end
        --
        codeinjections.addbookmarks(purged,method)
    else
        -- maybe a plugin messed up
    end
end

function bookmarks.installhandler(what,where,func)
    if not func then
        where, func = "after", where
    end
    if where == "before" or where == "after" then
        sequencers.appendaction(bookmarkactions,where,func)
    else
        report_tex("installing bookmark %a handlers in %a is not possible",what,tostring(where))
    end
end

-- interface

implement {
    name      = "setupbookmarks",
    actions   = bookmarks.setup,
    arguments = {
        {
            { "separatorset" },
            { "conversionset" },
            { "starter" },
            { "stopper" },
            { "segments" },
            { "showblocktitle" },
        }
    }
}

implement {
    name      = "registerbookmark",
    actions   = bookmarks.register,
    arguments = {
        {
            { "names" },
            { "opened" },
            { "force" },
            { "number" },
        }
    }
}

implement {
    name      = "overloadbookmark",
    actions   = bookmarks.overload,
    arguments = "2 strings",
}