9307175333

Committed 30 May 2024 06:08PM UTC coverage: 70.644% (-3.5%) from 74.124%

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Merge b18390e74 into 70ff5c335

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56.52

/packages/tableofcontents/init.lua

local base = require("packages.base")

local package = pl.class(base)
package._name = "tableofcontents"

if not SILE.scratch._tableofcontents then
   SILE.scratch._tableofcontents = {}
end

local toc_used = false

function package:moveTocNodes ()
   local node = SILE.scratch.info.thispage.toc
   if node then
      for i = 1, #node do
         node[i].pageno = self.packages.counters:formatCounter(SILE.scratch.counters.folio)
         table.insert(SILE.scratch.tableofcontents, node[i])
      end
   end
end

function package.writeToc (_)
   local tocdata = pl.pretty.write(SILE.scratch.tableofcontents)
   local tocfile, err = io.open(pl.path.splitext(SILE.input.filenames[1]) .. ".toc", "w")
   if not tocfile then
      return SU.error(err)
   end
   tocfile:write("return " .. tocdata)
   tocfile:close()

   if toc_used and not pl.tablex.deepcompare(SILE.scratch.tableofcontents, SILE.scratch._tableofcontents) then
      SU.msg("Notice: the table of contents has changed, please rerun SILE to update it.")
   end
end

function package.readToc (_)
   if SILE.scratch._tableofcontents and #SILE.scratch._tableofcontents > 0 then
      -- already loaded
      return SILE.scratch._tableofcontents
   end
   local tocfile, _ = io.open(pl.path.splitext(SILE.input.filenames[1]) .. ".toc")
   if not tocfile then
      return false -- No TOC yet
   end
   local doc = tocfile:read("*all")
   local toc = assert(load(doc))()
   SILE.scratch._tableofcontents = toc
   return SILE.scratch._tableofcontents
end

local function _linkWrapper (dest, func)
   if dest and SILE.Commands["pdf:link"] then
      return function ()
         SILE.call("pdf:link", { dest = dest }, func)
      end
   else
      return func
   end
end

-- Flatten a node list into just its string representation.
-- (Similar to SU.ast.contentToString(), but allows passing typeset
-- objects to functions that need plain strings).
local function _nodesToText (nodes)
   -- A real interword space width depends on several settings (depending on variable
   -- spaces being enabled or not, etc.), and the computation below takes that into
   -- account.
   local iwspc = SILE.shaper:measureSpace(SILE.font.loadDefaults({}))
   local iwspcmin = (iwspc.length - iwspc.shrink):tonumber()

   local string = ""
   for i = 1, #nodes do
      local node = nodes[i]
      if node.is_nnode or node.is_unshaped then
         string = string .. node:toText()
      elseif node.is_glue or node.is_kern then
         -- What we want to avoid is "small" glues or kerns to be expanded as full
         -- spaces.
         -- Comparing them to half of the smallest width of a possibly shrinkable
         -- interword space is fairly fragile and empirical: the content could contain
         -- font changes, so the comparison is wrong in the general case.
         -- It's a simplistic approach. We cannot really be sure what a "space" meant
         -- at the point where the kern or glue got absolutized.
         if node.width:tonumber() > iwspcmin * 0.5 then
            string = string .. " "
         end
      elseif not (node.is_zerohbox or node.is_migrating) then
         -- Here, typically, the main case is an hbox.
         -- Even if extracting its content could be possible in some regular cases
         -- we cannot take a general decision, as it is a versatile object  and its
         -- outputYourself() method could moreover have been redefined to do fancy
         -- things. Better warn and skip.
         SU.warn("Some content could not be converted to text: " .. node)
      end
   end
   -- Trim leading and trailing spaces, and simplify internal spaces.
   return pl.stringx.strip(string):gsub("%s%s+", " ")
end

if not SILE.scratch.pdf_destination_counter then
   SILE.scratch.pdf_destination_counter = 1
end

function package:_init ()
   base._init(self)
   if not SILE.scratch.tableofcontents then
      SILE.scratch.tableofcontents = {}
   end
   self:loadPackage("infonode")
   self:loadPackage("leaders")
   self.class:registerHook("endpage", self.moveTocNodes)
   self.class:registerHook("finish", self.writeToc)
   self:deprecatedExport("writeToc", self.writeToc)
   self:deprecatedExport("moveTocNodes", self.moveTocNodes)
end

function package:registerCommands ()
   self:registerCommand("tableofcontents", function (options, _)
      local depth = SU.cast("integer", options.depth or 3)
      local linking = SU.boolean(options.linking, true)
      toc_used = true
      local toc = self:readToc()
      if toc == false then
         SILE.call("tableofcontents:notocmessage")
         return
      end
      SILE.call("tableofcontents:header")
      for i = 1, #toc do
         local item = toc[i]
         if item.level <= depth then
            SILE.call("tableofcontents:item", {
               level = item.level,
               pageno = item.pageno,
               number = item.number,
               link = linking and item.link,
            }, item.label)
         end
      end
      SILE.call("tableofcontents:footer")
   end)

   self:registerCommand("tableofcontents:item", function (options, content)
      SILE.settings:temporarily(function ()
         SILE.settings:set("typesetter.parfillskip", SILE.types.node.glue())
         SILE.call(
            "tableofcontents:level" .. options.level .. "item",
            {},
            _linkWrapper(options.link, function ()
               SILE.call("tableofcontents:level" .. options.level .. "number", {}, function ()
                  if options.number then
                     SILE.typesetter:typeset(options.number or "")
                     SILE.call("kern", { width = "1spc" })
                  end
               end)
               SILE.process(content)
               SILE.call("dotfill")
               SILE.typesetter:typeset(options.pageno)
            end)
         )
      end)
   end)

   self:registerCommand("tocentry", function (options, content)
      local dest
      if SILE.Commands["pdf:destination"] then
         dest = "dest" .. tostring(SILE.scratch.pdf_destination_counter)
         SILE.call("pdf:destination", { name = dest })
         SILE.typesetter:pushState()
         SILE.process(content)
         local title = _nodesToText(SILE.typesetter.state.nodes)
         SILE.typesetter:popState()
         SILE.call("pdf:bookmark", { title = title, dest = dest, level = options.level })
         SILE.scratch.pdf_destination_counter = SILE.scratch.pdf_destination_counter + 1
      end
      SILE.call("info", {
         category = "toc",
         value = {
            label = SU.ast.stripContentPos(content),
            level = (options.level or 1),
            number = options.number,
            link = dest,
         },
      })
   end)

   self:registerCommand("tableofcontents:title", function (_, _)
      SU.deprecated("\\tableofcontents:title", "\\fluent{tableofcontents-title}", "0.13.0", "0.14.0")
   end, "Deprecated")

   self:registerCommand("tableofcontents:notocmessage", function (_, _)
      SILE.call("tableofcontents:headerfont", {}, function ()
         SILE.call("fluent", {}, { "tableofcontents-not-generated" })
      end)
   end)

   self:registerCommand("tableofcontents:headerfont", function (_, content)
      SILE.call("font", { size = 24, weight = 800 }, content)
   end)

   self:registerCommand("tableofcontents:header", function (_, _)
      SILE.call("par")
      SILE.call("noindent")
      SILE.call("tableofcontents:headerfont", {}, function ()
         SILE.call("fluent", {}, { "tableofcontents-title" })
      end)
      SILE.call("medskip")
   end)

   self:registerCommand("tableofcontents:footer", function (_, _) end)

   self:registerCommand("tableofcontents:level1item", function (_, content)
      SILE.call("bigskip")
      SILE.call("noindent")
      SILE.call("font", { size = 14, weight = 800 }, content)
      SILE.call("medskip")
   end)

   self:registerCommand("tableofcontents:level2item", function (_, content)
      SILE.call("noindent")
      SILE.call("font", { size = 12 }, content)
      SILE.call("medskip")
   end)

   self:registerCommand("tableofcontents:level3item", function (_, content)
      SILE.call("indent")
      SILE.call("font", { size = 10 }, content)
      SILE.call("smallskip")
   end)

   self:registerCommand("tableofcontents:level1number", function (_, _) end)

   self:registerCommand("tableofcontents:level2number", function (_, _) end)

   self:registerCommand("tableofcontents:level3number", function (_, _) end)
end

package.documentation = [[
\begin{document}
The \autodoc:package{tableofcontents} package provides tools for class authors to
create tables of contents (TOCs). When you are writing sectioning commands such
as \autodoc:command[check=false]{\chapter} or \autodoc:command[check=false]{\section}, your classes should call the
\autodoc:command{\tocentry[level=<number>, number=<strings>]{<title>}}
command to register a table of contents entry.
At the end of each page the class will call a hook function (\code{moveTocNodes}) that collates the table of contents entries from that pages and records which page they’re on.
At the end of the document another hook function (\code{writeToc}) will write this data to a file.
The next time the document is built, any use of the \autodoc:command{\tableofcontents} (typically near the beginning of a document) will be able to read that index data and output the TOC.
Because the toc entry and page data is not available until after rendering the document,
the TOC will not render until at least the second pass.
If by chance rendering the TOC itself changes the document pagination (e.g., the TOC spans more than one page) it will be necessary to run SILE a third time to get accurate page numbers shown in the TOC.

The \autodoc:command{\tableofcontents} command accepts a \autodoc:parameter{depth} option to
control the depth of the content added to the table.

If the \autodoc:package{pdf} package is loaded before using sectioning commands,
then a PDF document outline will be generated.
Moreover, entries in the table of contents will be active links to the
relevant sections. To disable the latter behavior, pass \autodoc:parameter{linking=false} to
the \autodoc:command{\tableofcontents} command.

Class designers can also style the table of contents by overriding the
following commands:

\begin{itemize}
\item{\autodoc:command{\tableofcontents:headerfont}: The font used for the header.}
\item{\autodoc:command{\tableofcontents:level1item}, \autodoc:command{\tableofcontents:level2item},
      etc.: Styling for entries.}
\item{\autodoc:command{\tableofcontents:level1number}, \autodoc:command{\tableofcontents:level2number},
      etc.: Deciding what to do with entry section number, if defined: by default, nothing (so they
      do not show up in the table of contents).}
\end{itemize}

\end{document}
]]

return package

1	local base = require("packages.base")	17✔
2
3	local package = pl.class(base)	17✔
4	package._name = "tableofcontents"	17✔
5
6	if not SILE.scratch._tableofcontents then	17✔
7	SILE.scratch._tableofcontents = {}	17✔
8	end
9
10	local toc_used = false	17✔
11
12	function package:moveTocNodes ()	17✔
13	local node = SILE.scratch.info.thispage.toc	35✔
14	if node then	35✔
15	for i = 1, #node do	8✔
16	node[i].pageno = self.packages.counters:formatCounter(SILE.scratch.counters.folio)	12✔
17	table.insert(SILE.scratch.tableofcontents, node[i])	6✔
18	end
19	end
20	end
21
22	function package.writeToc (_)	17✔
23	local tocdata = pl.pretty.write(SILE.scratch.tableofcontents)	34✔
24	local tocfile, err = io.open(pl.path.splitext(SILE.input.filenames[1]) .. ".toc", "w")	34✔
25	if not tocfile then	17✔
26	return SU.error(err)	×
27	end
28	tocfile:write("return " .. tocdata)	17✔
29	tocfile:close()	17✔
30
31	if toc_used and not pl.tablex.deepcompare(SILE.scratch.tableofcontents, SILE.scratch._tableofcontents) then	17✔
32	SU.msg("Notice: the table of contents has changed, please rerun SILE to update it.")	×
33	end
34	end
35
36	function package.readToc (_)	17✔
37	if SILE.scratch._tableofcontents and #SILE.scratch._tableofcontents > 0 then	×
38	-- already loaded
39	return SILE.scratch._tableofcontents	×
40	end
41	local tocfile, _ = io.open(pl.path.splitext(SILE.input.filenames[1]) .. ".toc")	×
42	if not tocfile then	×
43	return false -- No TOC yet	×
44	end
45	local doc = tocfile:read("*all")	×
46	local toc = assert(load(doc))()	×
47	SILE.scratch._tableofcontents = toc	×
48	return SILE.scratch._tableofcontents	×
49	end
50
51	local function _linkWrapper (dest, func)
52	if dest and SILE.Commands["pdf:link"] then	×
53	return function ()
54	SILE.call("pdf:link", { dest = dest }, func)	×
55	end
56	else
57	return func	×
58	end
59	end
60
61	-- Flatten a node list into just its string representation.
62	-- (Similar to SU.ast.contentToString(), but allows passing typeset
63	-- objects to functions that need plain strings).
64	local function _nodesToText (nodes)
65	-- A real interword space width depends on several settings (depending on variable
66	-- spaces being enabled or not, etc.), and the computation below takes that into
67	-- account.
68	local iwspc = SILE.shaper:measureSpace(SILE.font.loadDefaults({}))	4✔
69	local iwspcmin = (iwspc.length - iwspc.shrink):tonumber()	4✔
70
71	local string = ""	2✔
72	for i = 1, #nodes do	8✔
73	local node = nodes[i]	6✔
74	if node.is_nnode or node.is_unshaped then	8✔
75	string = string .. node:toText()	4✔
76	elseif node.is_glue or node.is_kern then	4✔
77	-- What we want to avoid is "small" glues or kerns to be expanded as full
78	-- spaces.
79	-- Comparing them to half of the smallest width of a possibly shrinkable
80	-- interword space is fairly fragile and empirical: the content could contain
81	-- font changes, so the comparison is wrong in the general case.
82	-- It's a simplistic approach. We cannot really be sure what a "space" meant
83	-- at the point where the kern or glue got absolutized.
84	if node.width:tonumber() > iwspcmin * 0.5 then	4✔
85	string = string .. " "	2✔
86	end
87	elseif not (node.is_zerohbox or node.is_migrating) then	2✔
88	-- Here, typically, the main case is an hbox.
89	-- Even if extracting its content could be possible in some regular cases
90	-- we cannot take a general decision, as it is a versatile object and its
91	-- outputYourself() method could moreover have been redefined to do fancy
92	-- things. Better warn and skip.
UNCOV 93	SU.warn("Some content could not be converted to text: " .. node)	×
94	end
95	end
96	-- Trim leading and trailing spaces, and simplify internal spaces.
97	return pl.stringx.strip(string):gsub("%s%s+", " ")	4✔
98	end
99
100	if not SILE.scratch.pdf_destination_counter then	17✔
101	SILE.scratch.pdf_destination_counter = 1	17✔
102	end
103
104	function package:_init ()	17✔
105	base._init(self)	17✔
106	if not SILE.scratch.tableofcontents then	17✔
107	SILE.scratch.tableofcontents = {}	17✔
108	end
109	self:loadPackage("infonode")	17✔
110	self:loadPackage("leaders")	17✔
111	self.class:registerHook("endpage", self.moveTocNodes)	17✔
112	self.class:registerHook("finish", self.writeToc)	17✔
113	self:deprecatedExport("writeToc", self.writeToc)	17✔
114	self:deprecatedExport("moveTocNodes", self.moveTocNodes)	17✔
115	end
116
117	function package:registerCommands ()	17✔
118	self:registerCommand("tableofcontents", function (options, _)	34✔
UNCOV 119	local depth = SU.cast("integer", options.depth or 3)	×
120	local linking = SU.boolean(options.linking, true)	×
121	toc_used = true	×
122	local toc = self:readToc()	×
123	if toc == false then	×
124	SILE.call("tableofcontents:notocmessage")	×
125	return	×
126	end
UNCOV 127	SILE.call("tableofcontents:header")	×
128	for i = 1, #toc do	×
129	local item = toc[i]	×
130	if item.level <= depth then	×
131	SILE.call("tableofcontents:item", {	×
132	level = item.level,
133	pageno = item.pageno,
134	number = item.number,
135	link = linking and item.link,
UNCOV 136	}, item.label)	×
137	end
138	end
UNCOV 139	SILE.call("tableofcontents:footer")	×
140	end)
141
142	self:registerCommand("tableofcontents:item", function (options, content)	34✔
UNCOV 143	SILE.settings:temporarily(function ()	×
NEW 144	SILE.settings:set("typesetter.parfillskip", SILE.types.node.glue())	×
145	SILE.call(	×
146	"tableofcontents:level" .. options.level .. "item",	×
147	{},
UNCOV 148	_linkWrapper(options.link, function ()	×
149	SILE.call("tableofcontents:level" .. options.level .. "number", {}, function ()	×
150	if options.number then	×
151	SILE.typesetter:typeset(options.number or "")	×
152	SILE.call("kern", { width = "1spc" })	×
153	end
154	end)
UNCOV 155	SILE.process(content)	×
156	SILE.call("dotfill")	×
157	SILE.typesetter:typeset(options.pageno)	×
158	end)
159	)
160	end)
161	end)
162
163	self:registerCommand("tocentry", function (options, content)	34✔
164	local dest
165	if SILE.Commands["pdf:destination"] then	6✔
166	dest = "dest" .. tostring(SILE.scratch.pdf_destination_counter)	2✔
167	SILE.call("pdf:destination", { name = dest })	2✔
168	SILE.typesetter:pushState()	2✔
169	SILE.process(content)	2✔
170	local title = _nodesToText(SILE.typesetter.state.nodes)	2✔
171	SILE.typesetter:popState()	2✔
172	SILE.call("pdf:bookmark", { title = title, dest = dest, level = options.level })	2✔
173	SILE.scratch.pdf_destination_counter = SILE.scratch.pdf_destination_counter + 1	2✔
174	end
175	SILE.call("info", {	12✔
176	category = "toc",
177	value = {	6✔
178	label = SU.ast.stripContentPos(content),	12✔
179	level = (options.level or 1),	6✔
180	number = options.number,	6✔
181	link = dest,	6✔
182	},	6✔
183	})
184	end)
185
186	self:registerCommand("tableofcontents:title", function (_, _)	34✔
UNCOV 187	SU.deprecated("\\tableofcontents:title", "\\fluent{tableofcontents-title}", "0.13.0", "0.14.0")	×
188	end, "Deprecated")	17✔
189
190	self:registerCommand("tableofcontents:notocmessage", function (_, _)	34✔
UNCOV 191	SILE.call("tableofcontents:headerfont", {}, function ()	×
192	SILE.call("fluent", {}, { "tableofcontents-not-generated" })	×
193	end)
194	end)
195
196	self:registerCommand("tableofcontents:headerfont", function (_, content)	34✔
UNCOV 197	SILE.call("font", { size = 24, weight = 800 }, content)	×
198	end)
199
200	self:registerCommand("tableofcontents:header", function (_, _)	34✔
UNCOV 201	SILE.call("par")	×
202	SILE.call("noindent")	×
203	SILE.call("tableofcontents:headerfont", {}, function ()	×
204	SILE.call("fluent", {}, { "tableofcontents-title" })	×
205	end)
UNCOV 206	SILE.call("medskip")	×
207	end)
208
209	self:registerCommand("tableofcontents:footer", function (_, _) end)	17✔
210
211	self:registerCommand("tableofcontents:level1item", function (_, content)	34✔
UNCOV 212	SILE.call("bigskip")	×
213	SILE.call("noindent")	×
214	SILE.call("font", { size = 14, weight = 800 }, content)	×
215	SILE.call("medskip")	×
216	end)
217
218	self:registerCommand("tableofcontents:level2item", function (_, content)	34✔
UNCOV 219	SILE.call("noindent")	×
220	SILE.call("font", { size = 12 }, content)	×
221	SILE.call("medskip")	×
222	end)
223
224	self:registerCommand("tableofcontents:level3item", function (_, content)	34✔
UNCOV 225	SILE.call("indent")	×
226	SILE.call("font", { size = 10 }, content)	×
227	SILE.call("smallskip")	×
228	end)
229
230	self:registerCommand("tableofcontents:level1number", function (_, _) end)	17✔
231
232	self:registerCommand("tableofcontents:level2number", function (_, _) end)	17✔
233
234	self:registerCommand("tableofcontents:level3number", function (_, _) end)	17✔
235	end
236
237	package.documentation = [[
238	\begin{document}
239	The \autodoc:package{tableofcontents} package provides tools for class authors to
240	create tables of contents (TOCs). When you are writing sectioning commands such
241	as \autodoc:command[check=false]{\chapter} or \autodoc:command[check=false]{\section}, your classes should call the
242	\autodoc:command{\tocentry[level=<number>, number=<strings>]{<title>}}
243	command to register a table of contents entry.
244	At the end of each page the class will call a hook function (\code{moveTocNodes}) that collates the table of contents entries from that pages and records which page they’re on.
245	At the end of the document another hook function (\code{writeToc}) will write this data to a file.
246	The next time the document is built, any use of the \autodoc:command{\tableofcontents} (typically near the beginning of a document) will be able to read that index data and output the TOC.
247	Because the toc entry and page data is not available until after rendering the document,
248	the TOC will not render until at least the second pass.
249	If by chance rendering the TOC itself changes the document pagination (e.g., the TOC spans more than one page) it will be necessary to run SILE a third time to get accurate page numbers shown in the TOC.
250
251	The \autodoc:command{\tableofcontents} command accepts a \autodoc:parameter{depth} option to
252	control the depth of the content added to the table.
253
254	If the \autodoc:package{pdf} package is loaded before using sectioning commands,
255	then a PDF document outline will be generated.
256	Moreover, entries in the table of contents will be active links to the
257	relevant sections. To disable the latter behavior, pass \autodoc:parameter{linking=false} to
258	the \autodoc:command{\tableofcontents} command.
259
260	Class designers can also style the table of contents by overriding the
261	following commands:
262
263	\begin{itemize}
264	\item{\autodoc:command{\tableofcontents:headerfont}: The font used for the header.}
265	\item{\autodoc:command{\tableofcontents:level1item}, \autodoc:command{\tableofcontents:level2item},
266	etc.: Styling for entries.}
267	\item{\autodoc:command{\tableofcontents:level1number}, \autodoc:command{\tableofcontents:level2number},
268	etc.: Deciding what to do with entry section number, if defined: by default, nothing (so they
269	do not show up in the table of contents).}
270	\end{itemize}
271
272	\end{document}
273	]]	17✔
274
275	return package	17✔

sile-typesetter / sile / 9307175333

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