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if not modules then modules = { } end modules ['buff-vis'] = {
version = 1.001,
comment = "companion to buff-vis.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type = type
local format = string.format
local C, P, V, patterns, lpegmatch = lpeg.C, lpeg.P, lpeg.V, lpeg.patterns, lpeg.match
visualizers = visualizers or { }
local patterns = { } visualizers.patterns = patterns
local fallback = context.verbatim
function visualizers.pattern(visualizer,kind,pattern)
if type(visualizer) == "table" and type(kind) == "string" then
kind = visualizer[kind] or visualizer.default or fallback
else
kind = fallback
end
return C(pattern)/kind
end
setmetatable(patterns, {
__index = function(t,k)
local v = require(format("v-%s.lua",k)) or false
context.input(format("v-%s.mkiv",k))
t[k] = v
return v
end
} )
local function visualizestring(method,content)
if content and content ~= "" then
lpegmatch(patterns[method],content)
end
end
visualizers.visualizestring = visualizestring
function visualizers.visualizefile(method,name)
visualizestring(method,resolvers.loadtexfile(name))
end
function visualizers.visualizebuffer(method,name)
lpegmatch(method,buffers.content(name))
end
local visualizer = {
start = function() context.startSnippet() end,
stop = function() context.stopSnippet() end ,
default = context.verbatim,
}
local patterns = lpeg.patterns
local pattern = visualizers.pattern
local texvisualizer = P { "process",
process =
V("start") * V("content") * V("stop"),
start =
pattern(visualizer,"start",patterns.beginofstring),
stop =
pattern(visualizer,"stop",patterns.endofstring),
content = (
pattern(visualizer,"default",patterns.anything)
)^1
}
return texvisualizer
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