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if not modules then modules = { } end modules ['buff-imp-tex'] = {
version = 1.001,
comment = "companion to v-tex.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- needs an update, use mult-low
local P, S, V, patterns = lpeg.P, lpeg.S, lpeg.V, lpeg.patterns
local context = context
local verbatim = context.verbatim
local makepattern = visualizers.makepattern
local makenested = visualizers.makenested
local getvisualizer = visualizers.getvisualizer
local TexSnippet = context.TexSnippet
local startTexSnippet = context.startTexSnippet
local stopTexSnippet = context.stopTexSnippet
local TexSnippetName = verbatim.TexSnippetName
local TexSnippetGroup = verbatim.TexSnippetGroup
local TexSnippetBoundary = verbatim.TexSnippetBoundary
local TexSnippetSpecial = verbatim.TexSnippetSpecial
local TexSnippetComment = verbatim.TexSnippetComment
local handler = visualizers.newhandler {
startinline = function() TexSnippet(false,"{") end,
stopinline = function() context("}") end,
startdisplay = function() startTexSnippet() end,
stopdisplay = function() stopTexSnippet() end ,
name = function(s) TexSnippetName(s) end,
group = function(s) TexSnippetGroup(s) end,
boundary = function(s) TexSnippetBoundary(s) end,
special = function(s) TexSnippetSpecial(s) end,
comment = function(s) TexSnippetComment(s) end,
}
-- todo: unicode letters in control sequences (slow as we need to test the nature)
local comment = S("%")
local name = P("\\") * (patterns.letter + S("@!?_"))^1
local escape = P("\\") * (patterns.anything - patterns.newline)^-1 -- else we get \n
local group = S("${}")
local boundary = S('[]()<>#="')
local special = S("/^_-&+'`|")
local p_comment = makepattern(handler,"comment",comment)
* (V("space") + V("content"))^0
local p_name = makepattern(handler,"name",name)
local p_escape = makepattern(handler,"name",escape)
local p_group = makepattern(handler,"group",group)
local p_boundary = makepattern(handler,"boundary",boundary)
local p_special = makepattern(handler,"special",special)
local p_somespace = V("newline") * V("emptyline")^0 * V("beginline")
+ V("space")
--~ local pattern = visualizers.pattern
local grammar = visualizers.newgrammar("default", { "visualizer",
comment = p_comment,
name = p_name,
escape = p_escape,
group = p_group,
boundary = p_boundary,
special = p_special,
somespace = p_somespace,
pattern = V("comment")
+ V("name") + V("escape") + V("group") + V("boundary") + V("special")
+ V("newline") * V("emptyline")^0 * V("beginline")
+ V("space")
+ V("default"),
visualizer = V("pattern")^1
} )
local parser = P(grammar)
visualizers.register("tex", { parser = parser, handler = handler, grammar = grammar } )
local function makecommand(handler,how,start,left,right)
local c, l, r, f = P(start), P(left), P(right), how
local n = ( P { l * ((1 - (l + r)) + V(1))^0 * r } + P(1-r) )^0
if type(how) == "string" then
f = function(s) getvisualizer(how,"direct")(s) end
end
return makepattern(handler,"name",c)
* V("somespace")^0
* makepattern(handler,"group",l)
* (n/f)
* makepattern(handler,"group",r)
end
local grammar = visualizers.newgrammar("default", { "visualizer",
comment = p_comment,
name = p_name,
escape = p_escape,
group = p_group,
boundary = p_boundary,
special = p_special,
somespace = p_somespace,
mpcode = makenested(handler,"mp","\\startMPcode","\\stopMPcode")
+ makenested(handler,"mp","\\startMPgraphic","\\stopMPgraphic")
+ makenested(handler,"mp","\\startuseMPgraphic","\\stopuseMPgraphic")
+ makenested(handler,"mp","\\startreusableMPgraphic","\\stopreusableMPgraphic")
+ makenested(handler,"mp","\\startuniqueMPgraphic","\\stopuniqueMPgraphic")
+ makenested(handler,"mp","\\startMPpage","\\stopMPpage"),
luacode = makenested (handler,"lua","\\startluacode","\\stopluacode")
+ makecommand(handler,"lua","\\ctxlua","{","}"),
pattern = V("comment")
+ V("mpcode") + V("luacode")
+ V("name") + V("escape") + V("group") + V("boundary") + V("special")
+ V("newline") * V("emptyline")^0 * V("beginline")
+ V("space")
+ V("default"),
visualizer = V("pattern")^1
} )
local parser = P(grammar)
visualizers.register("context", { parser = parser, handler = handler, grammar = grammar } )
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