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if not modules then modules = { } end modules ['buff-imp-xml'] = {
version = 1.001,
comment = "companion to v-xml.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
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 XmlSnippet = context.XmlSnippet
local startXmlSnippet = context.startXmlSnippet
local stopXmlSnippet = context.stopXmlSnippet
local XmlSnippetName = verbatim.XmlSnippetName
local XmlSnippetKey = verbatim.XmlSnippetKey
local XmlSnippetBoundary = verbatim.XmlSnippetBoundary
local XmlSnippetString = verbatim.XmlSnippetString
local XmlSnippetEqual = verbatim.XmlSnippetEqual
local XmlSnippetEntity = verbatim.XmlSnippetEntity
local XmlSnippetComment = verbatim.XmlSnippetComment
local XmlSnippetCdata = verbatim.XmlSnippetCdata
local handler = visualizers.newhandler {
startinline = function() XmlSnippet(false,"{") end,
stopinline = function() context("}") end,
startdisplay = function() startXmlSnippet() end,
stopdisplay = function() stopXmlSnippet () end,
name = function(s) XmlSnippetName(s) end,
key = function(s) XmlSnippetKey(s) end,
boundary = function(s) XmlSnippetBoundary(s) end,
string = function(s) XmlSnippetString(s) end,
equal = function(s) XmlSnippetEqual(s) end,
entity = function(s) XmlSnippetEntity(s) end,
comment = function(s) XmlSnippetComment(s) end,
cdata = function(s) XmlSnippetCdata(s) end,
}
local comment = P("--")
local alsoname = patterns.utf8two + patterns.utf8three + patterns.utf8four
----- alsoname = R("\128\255") -- basically any encoding without checking (fast)
local name = (patterns.letter + patterns.digit + S('_-.') + alsoname)^1
local entity = P("&") * (1-P(";"))^1 * P(";")
local openbegin = P("<")
local openend = P("</")
local closebegin = P("/>") + P(">")
local closeend = P(">")
local opencomment = P("<!--")
local closecomment = P("-->")
local openinstruction = P("<?")
local closeinstruction = P("?>")
local opencdata = P("<![CDATA[")
local closecdata = P("]]>")
local grammar = visualizers.newgrammar("default", { "visualizer",
sstring =
makepattern(handler,"string",patterns.dquote)
* (V("whitespace") + makepattern(handler,"default",1-patterns.dquote))^0
* makepattern(handler,"string",patterns.dquote),
dstring =
makepattern(handler,"string",patterns.squote)
* (V("whitespace") + makepattern(handler,"default",1-patterns.squote))^0
* makepattern(handler,"string",patterns.squote),
entity =
makepattern(handler,"entity",entity),
name =
makepattern(handler,"name",name)
* (
makepattern(handler,"default",patterns.colon)
* makepattern(handler,"name",name)
)^0,
key =
makepattern(handler,"key",name)
* (
makepattern(handler,"default",patterns.colon)
* makepattern(handler,"key",name)
)^0,
attributes = (
V("optionalwhitespace")
* V("key")
* V("optionalwhitespace")
* makepattern(handler,"equal",patterns.equal)
* V("optionalwhitespace")
* (V("dstring") + V("sstring"))
* V("optionalwhitespace")
)^0,
open =
makepattern(handler,"boundary",openbegin)
* V("name")
* V("optionalwhitespace")
* V("attributes")
* makepattern(handler,"boundary",closebegin),
close =
makepattern(handler,"boundary",openend)
* V("name")
* V("optionalwhitespace")
* makepattern(handler,"boundary",closeend),
comment =
makepattern(handler,"boundary",opencomment)
* (V("whitespace") + makepattern(handler,"comment",(1-closecomment)^1))^0 -- slow
* makepattern(handler,"boundary",closecomment),
cdata =
makepattern(handler,"boundary",opencdata)
* (V("whitespace") + makepattern(handler,"comment",(1-closecdata)^1))^0 -- slow
* makepattern(handler,"boundary",closecdata),
instruction =
makepattern(handler,"boundary",openinstruction)
* V("name")
* V("optionalwhitespace")
* V("attributes")
* V("optionalwhitespace")
* makepattern(handler,"boundary",closeinstruction),
pattern =
V("comment")
+ V("instruction")
+ V("cdata")
+ V("close")
+ V("open")
+ V("entity")
+ V("space")
+ V("line")
+ V("default"),
visualizer =
V("pattern")^1
} )
local parser = P(grammar)
visualizers.register("xml", { parser = parser, handler = handler, grammar = grammar } )
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