使用答案中的代码如何在 ConTeXt 中根据电子表格数据创建格式信函？，我正在根据 CSV 文件中的数据构建文档。我发现部分代码与章节标题不兼容，因此，如果我使用 添加目录\completecontent或使用 添加标题\getmarkings{chapter}，它将无法编译。
% macros=mkvi
\unprotect
\startluacode
local datasets = { }
local buffersraw = buffers.raw
local context = context
local ioloaddata = io.loaddata
local lpegmatch = lpeg.match
local stringformat = string.format
local stringmatch = string.match
local stringsub = string.sub
local tableconcat = table.concat
local tableswapped = table.swapped
local die = function (msg) print(msg or "ERROR") os.exit(1) end
local csv_parser
do
--- This is (more than) an RFC 4180 parser.
--- http://tools.ietf.org/html/rfc4180
local C, Cg, Cs, Ct, P, S, V
= lpeg.C, lpeg.Cg, lpeg.Cs, lpeg.Ct, lpeg.P, lpeg.S, lpeg.V
local backslash = P[[\letterbackslash]]
local comma = ","
local dquote = P[["]]
local eol = S"\n\r"^1
local noquote = 1 - dquote
local unescape = function (s) return stringsub(s, 2) end
csv_parser = P{
"file",
file = Ct((V"header" * eol)^-1 * V"records"),
header = Cg(Ct(V"name" * (comma * V"name")^0), "header"),
records = V"record" * (eol * V"record")^0 * eol^0,
record = Ct(V"field" * (comma * V"field")^0),
name = V"field",
field = V"escaped" + V"non_escaped",
--- Deviate from rfc: the “textdata” terminal was defined only
--- for 7bit ASCII. Also, any character may occur in a quoted
--- field as long as it is escaped with a backslash. (\TEX --- macros start with two backslashes.)
escaped = dquote
* Cs(((backslash * 1 / unescape) + noquote)^0)
* dquote
,
non_escaped = C((1 - dquote - eol - comma)^0),
}
end
local process = function (id, raw)
--- buffers may have trailing EOLs
raw = stringmatch(raw, "^[\n\r]*(.-)[\n\r]*$")
local data = lpegmatch(csv_parser, raw)
--- map column name -> column nr
data.header = tableswapped(data.header)
datasets[id] = data
end
--- escaping hell ahead, please ignore.
local s_item = [[
\bgroup
\string\def\string\insert{\string\getvalue{csv_insert_field}{%s}{%s}}%%
%s%% template
\egroup
]]
local typeset = function (id, template)
local data = datasets[id] or die("ERROR unknown dataset: " .. id)
template = stringmatch(buffersraw(template), "^[\n\r]*(.-)[\n\r]*$")
local result = { }
local last = \letterhash data
for i=1, last do
result[i] = stringformat(s_item, id, i, template)
end
context(tableconcat(result))
end
local insert = function (id, n, field)
local this = datasets[id]
context(this[n][this.header[field]])
end
commands.process_csv = process
commands.process_csv_file = function (id, fname)
process(id, ioloaddata(fname, true))
end
commands.typeset_csv_job = typeset
commands.insert_csv_field = insert
\stopluacode
\startinterface all
\setinterfaceconstant{template}{template}
\setinterfaceconstant {data}{data}
\stopinterface
\def\processcsvbuffer[#id][#buf]{%
\ctxcommand{process_csv([[#id]], buffers.raw(\!!bs#buf\!!es))}%
}
\def\processcsvfile[#id][#filename]{%
\ctxcommand{process_csv_file([[#id]], \!!bs\detokenize{#filename}\!!es)}%
}
%% modeled after \startbuffer
\setuvalue{\e!start csvtemplate}{%
\begingroup
\obeylines
\dosingleempty\csv_template_start%
}
\def\csv_template_start[#id]{%
\buff_start_indeed{}{#id}{\e!start csvtemplate}{\e!stop csvtemplate}%
}
\installnamespace {csvjob}
\installcommandhandler \????csvjob {csvjob} \????csvjob
\appendtoks
\setuevalue{\currentcsvjob}{\csv_job_direct[\currentcsvjob]}
\to \everydefinecsvjob
\unexpanded\def\csv_job_direct[#id]{%
\edef\currentcsvjob{#id}%
\dosingleempty\csv_job_indeed%
}
\def\csv_job_indeed[#setups]{%
\iffirstargument\setupcurrentcsvjob[#setups]\fi
\ctxcommand{typeset_csv_job(
[[\csvjobparameter\c!data]],
[[\csvjobparameter\c!template]])}%
}
\def\csv_insert_field#id#n[#field]{%
\ctxcommand{insert_csv_field([[#id]], #n, [[#field]])}%
}
\protect
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% demo
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Stepwise instructions.
%% step 1: Define template.
\startcsvtemplate [tpl]
\chapter{\insert[Name]}
You owe \insert[Amount]. Please send it before \insert[Date].
\par
\stopcsvtemplate
%% step 2: Define an input (CSV).
\startbuffer[csdata]
Name,Amount,Date
"Mr. White","\\letterdollar 300","Dec. 2, 1911"
"Mr. Brown","\\letterdollar 300","Dec. 3, 1911"
"Ms. Premise","\\letterdollar 42","Dec. 4, 1911"
"Ms. Conclusion","\\letterdollar 23","Dec. 5, 1911"
\stopbuffer
%% step 3: Parse and store the input.
\processcsvbuffer[one][csdata]
%\processcsvfile[two][test.csv]
%% step 4: Declare a job, joining dataset and template.
\definecsvjob [testing] [
data=one,
template=tpl,
]
%% step 5: Enjoy!
\starttext
\completecontent
\testing
\stoptext
上述示例包含目录，但无法编译。如果我删除\completecontent，文档可以顺利编译。
当我的文档是使用此 CSV 格式信函代码构建时，如何向其中添加目录和标题？
答案1
添加\expanded呼叫\chapter{...}可以解决您的问题。
检查.tuc文件显示章节标题被写入章节列表（Lua 表）中"\\insert [Name]"，即作为未扩展的输入。\expanded{...}扩展其内容（最深优先）；现在，\chapter只能看到问题少得多的内容Ms. Premise（例如）。
\startcsvtemplate [tpl]
% \chapter{\insert[Name]}} %% doesn't work
\expanded{\chapter{\insert[Name]}}
You owe \insert[Amount]. Please send it before \insert[Date].
\par
\stopcsvtemplate
更深入的解释：\insert[Name]在模板内部扩展可获得所需的名称。将相同的代码导出到模板外部（通过将其写入在其他地方使用的列表，然后在那里扩展它）会导致错误。