summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/context/base/trac-lmx.lua
blob: 664815c66182572b2b07fb8b5b2fbbd079334f05 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
if not modules then modules = { } end modules ['trac-lmx'] = {
    version   = 1.002,
    comment   = "companion to trac-lmx.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

-- todo: use lpeg instead (although not really needed)

local gsub, format, concat, byte = string.gsub, string.format, table.concat, string.byte

lmx = lmx or { }

local escapes = {
    ['&'] = '&',
    ['<'] = '&lt;',
    ['>'] = '&gt;',
    ['"'] = '&quot;'
}

-- variables

lmx.variables = { } -- global, shared

local lmxvariables = lmx.variables

lmxvariables['title-default']           = 'ConTeXt LMX File'
lmxvariables['title']                   = lmx.variables['title-default']
lmxvariables['color-background-green']  = '#4F6F6F'
lmxvariables['color-background-blue']   = '#6F6F8F'
lmxvariables['color-background-yellow'] = '#8F8F6F'
lmxvariables['color-background-purple'] = '#8F6F8F'
lmxvariables['color-background-body']   = '#808080'
lmxvariables['color-background-main']   = '#3F3F3F'
lmxvariables['color-background-one']    = lmxvariables['color-background-green']
lmxvariables['color-background-two']    = lmxvariables['color-background-blue']

function lmx.set(key, value)
    lmxvariables[key] = value
end

function lmx.get(key)
    return lmxvariables[key] or ""
end

-- helpers

local variables, result = { } -- we assume no nesting

local function do_print(one,two,...)
    if two then
        result[#result+1] = concat { one, two, ... }
    else
        result[#result+1] = one
    end
end

local function do_escape(str)
    str = tostring(str)
    str = gsub(str,'&','&amp;')
    str = gsub(str,'[<>"]',escapes)
    return str
end

local function do_urlescaped(str)
    return (gsub(str,"[^%a%d]",format("%%0x",byte("%1"))))
end

function do_type(str)
    if str then do_print("<tt>" .. do_escape(str) .. "</tt>") end
end

local function do_variable(str)
    return variables[str] or lmxvariables[str] -- or format("<!-- unset lmx instance variable: %s -->",str or "?")
end

function lmx.loadedfile(name)
    name = (resolvers and resolvers.find_file and resolvers.find_file(name)) or name
    return io.loaddata(name)
end

local function do_include(filename)
    local stylepath = do_variable('includepath')
    local data = lmx.loadedfile(filename)
    if (not data or data == "") and stylepath ~= "" then
        data = lmx.loadedfile(file.join(stylepath,filename))
    end
    if not data or data == "" then
        data = format("<!-- unknown lmx include file: %s -->",filename)
    end
    return data
end

lmx.print     = do_print
lmx.type      = do_type
lmx.escape    = do_escape
lmx.urlescape = do_escape
lmx.variable  = do_variable
lmx.include   = do_include

function lmx.pv(str)
    do_print(do_variable(str) or "")
end

function lmx.tv(str)
    lmx.type(do_variable(str) or "")
end

local template = [[
    local definitions = { }
    local p, v, e, t, pv, tv = lmx.print, lmx.variable, lmx.escape, lmx.type, lmx.pv, lmx.tv
    %s
]]

local cache = { }

local trace = false

function lmx.new(data,variables)
    data = data or ""
    local known = cache[data]
    if not known then
        local definitions = { }
        data = gsub(data,"<%?lmx%-include%s+(.-)%s-%?>", function(filename)
            return lmx.include(filename)
        end)
        local definitions =  { }
        data = gsub(data,"<%?lmx%-define%-begin%s+(%S-)%s-%?>(.-)<%?lmx%-define%-end%s-%?>", function(tag,content)
            definitions[tag] = content
            return ""
        end)
        data = gsub(data,"<%?lmx%-resolve%s+(%S-)%s-%?>", function(tag)
            return definitions[tag] or ""
        end)
        data = gsub(data .. "<?lua ?>","(.-)<%?lua%s+(.-)%s*%?>", function(txt,lua)
            txt = gsub(txt,"%c+","\n")
            return format("p(%q)%s ",txt,lua) -- nb! space
        end)
        data = format(template,data)
        known = {
            data = trace and data,
            variables = variables or { },
            converter = loadstring(data),
        }
    elseif variables then
        known.variables = variables
    end
    return known, known.variables
end

function lmx.reset(self)
    self.variables = { }
end

function lmx.result(self)
    if trace then
        return self.data
    else
        variables, result = self.variables, { }
        self.converter()
        return concat(result)
    end
end

-- file converter

local loaded = { }

function lmx.convert(templatefile,resultfile,variables)
    local data = loaded[templatefile]
    if not data then
        data = lmx.new(lmx.loadedfile(templatefile),variables)
        loaded[template] = data
    elseif variables then
        data.variables = variables
    end
    local result = lmx.result(data)
    if resultfile then
        io.savedata(resultfile,result)
    else
        return lmx.result(data,result)
    end
end

-- these can be overloaded; we assume that the os handles filename associations

lmx.lmxfile = function(filename) return filename end -- beware, these can be set!
lmx.htmfile = function(filename) return filename end -- beware, these can be set!

if os.type == "windows" then
    lmx.popupfile = function(filename) os.execute("start " .. filename) end
else
    lmx.popupfile = function(filename) os.execute(filename) end
end

function lmx.make(name,variables)
    local lmxfile = lmx.lmxfile(name)
    local htmfile = lmx.htmfile(name)
    if lmxfile == htmfile then
        htmfile = gsub(lmxfile, "%.%a+$", "html")
    end
    lmx.convert(lmxfile,htmfile,variables)
    return htmfile
end

function lmx.show(name,variables)
    local htmfile = lmx.make(name,variables)
    lmx.popupfile(htmfile)
    return htmfile
end

-- test

--~ print(lmx.result(lmx.new(io.loaddata("t:/sources/context-timing.lmx"))))

-- command line

if arg then
    if     arg[1] == "--show"    then if arg[2] then lmx.show   (arg[2])                        end
    elseif arg[1] == "--convert" then if arg[2] then lmx.convert(arg[2], arg[3] or "temp.html") end
    end
end