summaryrefslogtreecommitdiff
path: root/biblio/citation-style-language/citeproc-latex-core.lua
blob: 8472818bac20e38481b8200c4560da3787a2266c (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
--
-- Copyright (c) 2021-2022 Zeping Lee
-- Released under the MIT license.
-- Repository: https://github.com/zepinglee/citeproc-lua
--

local core = {}

local citeproc = require("citeproc")
local bibtex  -- = require("citeproc-bibtex")  -- load on demand
local util = citeproc.util
require("lualibs")


core.locale_file_format = "csl-locales-%s.xml"
core.uncited_ids = {}
core.uncite_all_items = false


function core.read_file(file_name, ftype, file_info)
  if file_info then
    file_info = util.capitalize(file_info)
  else
    file_info = "File"
  end
  local path = kpse.find_file(file_name, ftype)
  if not path then
    if ftype and not util.endswith(file_name, ftype) then
      file_name = file_name .. ftype
    end
    util.error(string.format('%s "%s" not found', file_info, file_name))
    return nil
  end
  local file = io.open(path, "r")
  if not file then
    util.error(string.format('Cannot open %s "%s"', file_info, path))
    return nil
  end
  local contents = file:read("*a")
  file:close()
  return contents
end


local function read_data_file(data_file)
  local file_name = data_file
  local extension = nil
  local contents = nil

  if util.endswith(data_file, ".json") then
    extension = ".json"
    contents = core.read_file(data_file, nil, "database file")
  elseif util.endswith(data_file, ".bib") then
    extension = ".bib"
    contents = core.read_file(data_file, "bib", "database file")
  else
    local path = kpse.find_file(data_file .. ".json")
    if path then
      file_name = data_file .. ".json"
      extension = ".json"
      contents = core.read_file(data_file .. ".json", nil, "database file")
    else
      path = kpse.find_file(data_file, "bib")
      if path then
        file_name = data_file .. ".bib"
        extension = ".bib"
        contents = core.read_file(data_file, "bib", "database file")
      else
        util.error(string.format('Cannot find database file "%s"', data_file .. ".json"))
      end
    end
  end

  local csl_items = nil

  if extension == ".json" then
    csl_items = utilities.json.tolua(contents)
  elseif extension == ".bib" then
    bibtex = bibtex or require("citeproc-bibtex")
    csl_items = bibtex.parse(contents)
  end

  return file_name, csl_items
end


local function read_data_files(data_files)
  local bib = {}
  for _, data_file in ipairs(data_files) do
    local file_name, csl_items = read_data_file(data_file)

    -- TODO: parse bib entries on demand
    for _, item in ipairs(csl_items) do
      local id = item.id
      if bib[id] then
        util.warning(string.format('Duplicate entry key "%s" in "%s".', id, file_name))
      else
        bib[id] = item
      end
    end
  end
  return bib
end



function core.make_citeproc_sys(data_files)
  core.bib = read_data_files(data_files)
  local citeproc_sys = {
    retrieveLocale = function (lang)
      local locale_file_format = core.locale_file_format or "locales-%s.xml"
      local filename = string.format(locale_file_format, lang)
      return core.read_file(filename)
    end,
    retrieveItem = function (id)
      local res = core.bib[id]
      return res
    end
  }

  return citeproc_sys
end

function core.init(style_name, data_files, lang)
  if style_name == "" or #data_files == 0 then
    return nil
  end
  local style = core.read_file(style_name .. ".csl", nil, "style")
  if not style then
    util.error(string.format('Failed to load style "%s.csl"', style_name))
    return nil
  end

  local force_lang = nil
  if lang and lang ~= "" then
    force_lang = true
  else
    lang = nil
  end

  local citeproc_sys = core.make_citeproc_sys(data_files)
  local engine = citeproc.new(citeproc_sys, style, lang, force_lang)
  return engine
end

local function parse_latex_seq(s)
  local t = {}
  for item in string.gmatch(s, "(%b{})") do
    item = string.sub(item, 2, -2)
    table.insert(t, item)
  end
  return t
end

local function parse_latex_prop(s)
  local t = {}
  for key, value in string.gmatch(s, "([%w%-]+)%s*=%s*(%b{})") do
    value = string.sub(value, 2, -2)
    if value == "true" then
      value = true
    elseif value == "false" then
      value = false
    end
    t[key] = value
  end
  return t
end

function core.make_citation(citation_info)
  -- `citation_info`: "citationID={ITEM-1@2},citationItems={{id={ITEM-1},label={page},locator={6}}},properties={noteIndex={3}}"
  local citation = parse_latex_prop(citation_info)
  assert(citation.citationID)
  assert(citation.citationItems)
  assert(citation.properties)

 citation.citationItems = parse_latex_seq(citation.citationItems)

  for i, item in ipairs(citation.citationItems) do
    citation.citationItems[i] = parse_latex_prop(item)
  end

  citation.properties = parse_latex_prop(citation.properties)
  local note_index = citation.properties.noteIndex
  if not note_index or note_index == "" then
    citation.properties.noteIndex = 0
  elseif type(note_index) == "string" and string.match(note_index, "^%d+$") then
    citation.properties.noteIndex = tonumber(note_index)
  else
    util.error(string.format('Invalid note index "%s".', note_index))
  end

  return citation
end


function core.process_citations(engine, citations)
  local citations_pre = {}

  core.update_uncited_items(engine, citations)
  local citation_strings = {}

  for _, citation in ipairs(citations) do
    if citation.citationID ~= "@nocite" then
      local citation_str = engine:process_citation(citation)
        citation_strings[citation.citationID] = citation_str

      table.insert(citations_pre, {citation.citationID, citation.properties.noteIndex})
    end
  end

  return citation_strings
end


function core.update_uncited_items(engine, citations)
  -- util.debug(core.uncite_all_items)
  if core.uncite_all_items then
    -- \nocite{*}
    for id, _ in pairs(core.bib) do
      table.insert(core.uncited_ids, id)
    end
  else
    for _, citation in ipairs(citations) do
      if citation.citationID == "@nocite" then
        for _, cite_item in ipairs(citation.citationItems) do
          if cite_item.id == "*" then
            if not core.uncite_all_items then
              for id, _ in pairs(core.bib) do
                table.insert(core.uncited_ids, id)
              end
              core.uncite_all_items = true
            end
          else
            table.insert(core.uncited_ids, cite_item.id)
          end
        end
      end
    end
  end
  engine:updateUncitedItems(core.uncited_ids)
end


function core.make_bibliography(engine)
  local result = engine:makeBibliography()

  local params = result[1]
  local bib_items = result[2]

  local res = ""

  local bib_options = ""
  if params["hangingindent"] then
    bib_options = bib_options .. "\n  hanging-indent = true,"
  end
  if params["linespacing"] then
    bib_options = bib_options .. string.format("\n  line-spacing = %d,", params["linespacing"])
  end
  if params["entryspacing"] then
    bib_options = bib_options .. string.format("\n  entry-spacing = %d,", params["entryspacing"])
  end

  if bib_options ~= "" then
    bib_options = "\\cslsetup{" .. bib_options .. "\n}\n\n"
    res = res .. bib_options
  end

  if params.bibstart then
    res = res .. params.bibstart
  end

  for _, bib_item in ipairs(bib_items) do
    res = res .. "\n" .. bib_item
  end

  if params.bibend then
    res = res .. "\n" .. params.bibend
  end
  return res
end


return core