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1if not modules then modules = { } end modules ['buff-imp-parsed-xml'] = {
2    version   = 1.001,
3    comment   = "companion to buff-imp-parsed-xml.mkiv",
4    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5    copyright = "PRAGMA ADE / ConTeXt Development Team",
6    license   = "see context related readme files"
7}
8
9local next = next
10local format = string.format
11
12local context                     = context
13local verbatim                    = context.verbatim
14
15local write                       = visualizers.write
16local writespace                  = visualizers.writespace
17local writeargument               = visualizers.writeargument
18
19local ParsedXmlSnippetKey         = context.ParsedXmlSnippetKey
20local ParsedXmlSnippetValue       = context.ParsedXmlSnippetValue
21
22local ParsedXmlSnippetElement     = verbatim.ParsedXmlSnippetElement
23local ParsedXmlSnippetInstruction = verbatim.ParsedXmlSnippetInstruction
24local ParsedXmlSnippetComment     = verbatim.ParsedXmlSnippetComment
25local ParsedXmlSnippetCdata       = verbatim.ParsedXmlSnippetCdata
26local ParsedXmlSnippetDoctype     = verbatim.ParsedXmlSnippetDoctype
27
28local startParsedXmlSnippet       = context.startParsedXmlSnippet
29local stopParsedXmlSnippet        = context.stopParsedXmlSnippet
30
31local parsedxmlhandler = xml.newhandlers { -- todo: treat spaces and tabs
32    name = "parsedxml",
33    handle = function(...)
34        print("error:",...) -- we need a handler as fallback, even if not used
35    end,
36    functions  = {
37        ["@el@"] = function(e,handler)
38            local at = e.at
39            if at and next(at) then
40                ParsedXmlSnippetElement(format("<%s",e.tg))
41                for k, v in next, at do
42                    writespace()
43                    ParsedXmlSnippetKey()
44                    writeargument(k)
45                    verbatim("=")
46                    ParsedXmlSnippetValue()
47                    writeargument(format("%q",k))
48                end
49                ParsedXmlSnippetElement(">")
50            else
51                ParsedXmlSnippetElement(format("<%s>",e.tg))
52            end
53            handler.serialize(e.dt,handler)
54            ParsedXmlSnippetElement(format("</%s>",e.tg))
55        end,
56        ["@pi@"] = function(e,handler)
57            ParsedXmlSnippetInstruction("<?")
58            write(e.dt[1])
59            ParsedXmlSnippetInstruction("?>")
60        end ,
61        ["@cm@"] = function(e,handler)
62            ParsedXmlSnippetComment("<!--")
63            write(e.dt[1])
64            ParsedXmlSnippetComment("-->")
65        end,
66        ["@cd@"] = function(e,handler)
67            ParsedXmlSnippetCdata("<![CDATA[")
68            write(e.dt[1])
69            ParsedXmlSnippetCdata("]]>")
70        end,
71        ["@dt@"] = function(e,handler)
72            ParsedXmlSnippetDoctype("<!DOCTYPE")
73            write(e.dt[1])
74            ParsedXmlSnippetDoctype(">")
75        end,
76        ["@tx@"] = function(s,handler)
77            write(s)
78        end,
79    }
80}
81
82local function parsedxml(root,pattern)
83    if root then
84        if pattern then
85            root = xml.filter(root,pattern)
86        end
87        if root then
88            context.startParsedXmlSnippet()
89            xml.serialize(root,parsedxmlhandler)
90            context.stopParsedXmlSnippet()
91        end
92    end
93end
94
95local function parser(str,settings)
96    parsedxml(xml.convert(string.strip(str)),settings and settings.pattern)
97end
98
99visualizers.parsedxml = parsedxml -- for use at the lua end (maybe namespace needed)
100
101visualizers.register("parsed-xml", { parser = parser } )
102
103