diff options
Diffstat (limited to 'Master/texmf-dist/tex/context/base/mkiv/typo-prc.lua')
-rw-r--r-- | Master/texmf-dist/tex/context/base/mkiv/typo-prc.lua | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkiv/typo-prc.lua b/Master/texmf-dist/tex/context/base/mkiv/typo-prc.lua new file mode 100644 index 00000000000..cde66df0087 --- /dev/null +++ b/Master/texmf-dist/tex/context/base/mkiv/typo-prc.lua @@ -0,0 +1,129 @@ +if not modules then modules = { } end modules ['typo-prc'] = { + version = 1.001, + comment = "companion to typo-prc.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +local lpegmatch, patterns, P, C, Cs = lpeg.match, lpeg.patterns, lpeg.P, lpeg.C, lpeg.Cs + +-- processors: syntax: processor->data ... not ok yet + +local context = context +local implement = interfaces.implement + +local formatters = string.formatters + +typesetters.processors = typesetters.processors or { } +local processors = typesetters.processors + +local trace_processors = false +local report_processors = logs.reporter("processors") +local registered = { } + +local ctx_applyprocessor = context.applyprocessor +local ctx_firstofoneargument = context.firstofoneargument + +trackers.register("typesetters.processors", function(v) trace_processors = v end) + +function processors.register(p) + registered[p] = true +end + +function processors.reset(p) + registered[p] = nil +end + +--~ local splitter = lpeg.splitat("->",true) -- also support => + +local becomes = P('->') +local processor = (1-becomes)^1 +local splitter = C(processor) * becomes * Cs(patterns.argument + patterns.content) + +function processors.split(str) + local p, s = lpegmatch(splitter,str) + if registered[p] then + return p, s + else + return false, str + end +end + +function processors.apply(p,s) + local str = p + if s == nil then + p, s = lpegmatch(splitter,p) + end + if p and registered[p] then + if trace_processors then + report_processors("applying %s processor %a, argument: %s","known",p,s) + end + ctx_applyprocessor(p,s) + elseif s then + if trace_processors then + report_processors("applying %s processor %a, argument: %s","unknown",p,s) + end + context(s) + elseif str then + if trace_processors then + report_processors("applying %s processor, data: %s","ignored",str) + end + context(str) + end +end + +function processors.startapply(p,s) + local str = p + if s == nil then + p, s = lpegmatch(splitter,p) + end + if p and registered[p] then + if trace_processors then + report_processors("start applying %s processor %a","known",p) + end + ctx_applyprocessor(p) + context("{") + return s + elseif p then + if trace_processors then + report_processors("start applying %s processor %a","unknown",p) + end + ctx_firstofoneargument() + context("{") + return s + else + if trace_processors then + report_processors("start applying %s processor","ignored") + end + ctx_firstofoneargument() + context("{") + return str + end +end + +function processors.stopapply() + context("}") + if trace_processors then + report_processors("stop applying processor") + end +end + +function processors.tostring(str) + local p, s = lpegmatch(splitter,str) + if registered[p] then + return formatters["\\applyprocessor{%s}{%s}"](p,s) + else + return str + end +end + +function processors.stripped(str) + local p, s = lpegmatch(splitter,str) + return s or str +end + +-- interface + +implement { name = "registerstructureprocessor", actions = processors.register, arguments = "string" } +implement { name = "resetstructureprocessor", actions = processors.reset, arguments = "string" } |