summaryrefslogtreecommitdiff
path: root/src/tutorial.sml
blob: 605b1f5ed8d82b12c58423dc17f0ef5c0619191f (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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
(* Copyright (c) 2011, Adam Chlipala
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - The names of contributors may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

structure Tutorial :> TUTORIAL = struct

fun readAll inf =
    let
        fun loop acc =
            case TextIO.inputLine inf of
                NONE => Substring.full (String.concat (rev acc))
              | SOME line => loop (line :: acc)
    in
        loop []
        before TextIO.closeIn inf
    end

val readAllFile = readAll o TextIO.openIn

fun fixupFile (fname, title) =
    let
        val source = readAllFile "/tmp/final.html"
        val outf = TextIO.openOut (OS.Path.mkAbsolute {relativeTo = OS.FileSys.getDir (),
                                                       path = OS.Path.joinBaseExt {base = OS.Path.base fname, ext = SOME "html"}})

        val (befor, after) = Substring.position "<title>" source

        fun proseLoop source =
            let
                val (befor, after) = Substring.splitl (fn ch => ch <> #"&") source
            in
                if Substring.isEmpty after then
                    TextIO.outputSubstr (outf, source)
                else if Substring.size after >= 4 andalso Substring.string (Substring.slice (after, 1, SOME 3)) = "lt;" then
                    (TextIO.outputSubstr (outf, befor);
                     TextIO.output (outf, "<");
                     proseLoop (Substring.slice (after, 4, NONE)))
                else if Substring.size after >= 4 andalso Substring.string (Substring.slice (after, 1, SOME 3)) = "gt;" then
                    (TextIO.outputSubstr (outf, befor);
                     TextIO.output (outf, ">");
                     proseLoop (Substring.slice (after, 4, NONE)))
                else if Substring.size after >= 5 andalso Substring.string (Substring.slice (after, 1, SOME 4)) = "amp;" then
                    (TextIO.outputSubstr (outf, befor);
                     TextIO.output (outf, "&");
                     proseLoop (Substring.slice (after, 5, NONE)))
                else
                    raise Fail "Unsupported HTML escape"
            end

        fun loop source =
            let
                val (befor, after) = Substring.position "<span class=\"comment-delimiter\">(* </span><span class=\"comment\">" source
            in
                if Substring.isEmpty after then
                   TextIO.outputSubstr (outf, source)
                else
                    let
                        val (befor', after) = Substring.position " </span><span class=\"comment-delimiter\">*)</span>"
                                                                 (Substring.slice (after, 64, NONE))
                    in
                        if Substring.isEmpty after then
                            TextIO.outputSubstr (outf, source)
                        else
                            (TextIO.outputSubstr (outf, befor);
                             TextIO.output (outf, "</pre>");
                             if Substring.size befor' >= 1 andalso Substring.sub (befor', 0) = #"*" then
                                 (TextIO.output (outf, "<h2>");
                                  proseLoop (Substring.slice (befor', 2, NONE));
                                  TextIO.output (outf, "</h2>"))
                             else
                                 (TextIO.output (outf, "<div class=\"prose\">");
                                  proseLoop befor';
                                  TextIO.output (outf, "</div>"));
                             TextIO.output (outf, "<pre>");
                             loop (Substring.slice (after, 49, NONE)))
                    end
            end
    in
        if Substring.isEmpty after then
            raise Fail ("Missing <title> for " ^ title)
        else
            (TextIO.outputSubstr (outf, befor);
             TextIO.output (outf, "<style type=\"text/css\">\n");
             TextIO.output (outf, "<!--\n");
             TextIO.output (outf, "\tdiv.prose {\n");
             TextIO.output (outf, "\t\tfont-family: Arial;\n");
             TextIO.output (outf, "\t\tbackground-color: #CCFFCC;\n");
             TextIO.output (outf, "\t\tborder-style: solid;\n");
             TextIO.output (outf, "\t\tpadding: 5px;\n");
             TextIO.output (outf, "\t\tfont-size: larger;\n");
             TextIO.output (outf, "\t}\n");
             TextIO.output (outf, "\th2 {\n");
             TextIO.output (outf, "\t\tfont-family: Arial;\n");
             TextIO.output (outf, "\t\tfont-size: 20pt;\n");
             TextIO.output (outf, "\t\tbackground-color: #99FF99;\n");
             TextIO.output (outf, "\t\tpadding: 5px;\n");
             TextIO.output (outf, "\t}\n");
             TextIO.output (outf, "\ta:link {\n");
             TextIO.output (outf, "\t\ttext-decoration: underline;\n");
             TextIO.output (outf, "\t\tcolor: blue;\n");
             TextIO.output (outf, "\t}\n");
             TextIO.output (outf, "\ta:visited {\n");
             TextIO.output (outf, "\t\ttext-decoration: underline;\n");
             TextIO.output (outf, "\t\tcolor: red;\n");
             TextIO.output (outf, "\t}\n");
             TextIO.output (outf, "-->\n");
             TextIO.output (outf, "</style>\n");
             TextIO.output (outf, "<title>");
             TextIO.output (outf, title);
             let
                 val (befor, after) = Substring.position "</title>" after
             in
                 if Substring.isEmpty after then
                     raise Fail ("Missing </title> for " ^ title)
                 else
                     let
                         val (befor, after) = Substring.position "<body>" after
                     in
                         if Substring.isEmpty after then
                             raise Fail ("Missing <body> for " ^ title)
                         else
                             (TextIO.outputSubstr (outf, befor);
                              TextIO.output (outf, "<body><h1>");
                              TextIO.output (outf, title);
                              TextIO.output (outf, "</h1>");
                              loop (Substring.slice (after, 6, NONE)))
                     end
             end;
             TextIO.closeOut outf)
    end

fun doUr fname =
    let
        val inf = TextIO.openIn fname

        val title = case TextIO.inputLine inf of
                        NONE => raise Fail ("No title comment at start of " ^ fname)
                      | SOME title => title

        val title = String.substring (title, 3, size title - 7)

        val eval = TextIO.openOut "/tmp/eval.ur"
        val gen = TextIO.openOut "/tmp/gen.ur"

        fun untilEnd source =
            let
                val (befor, after) = Substring.position "(* end *)" source
            in
                if Substring.isEmpty after then
                    (source, Substring.full "")
                else
                    (befor, Substring.slice (after, 9, NONE))
            end

        fun doDirectives (count, source) =
            let
                val safe = String.translate (fn #"<" => "&lt;"
                                              | #"&" => "&amp;"
                                              | #"{" => "&#123;"
                                              | #"(" => "&#40;"
                                              | #"\n" => "&#40;*NL*)\n"
                                              | #" " => "&#40;*NL*) "
                                              | ch => str ch) o Substring.string

                val (befor, after) = Substring.position "(* begin " source

                fun default () = (TextIO.outputSubstr (eval, source);
                                  TextIO.output (gen, safe source))
            in
                if Substring.isEmpty after then
                    default ()
                else
                    let
                        val (command, after) = Substring.splitl (not o Char.isSpace) (Substring.slice (after, 9, NONE))
                    in
                        if Substring.isEmpty after then
                            default ()
                        else
                            let
                                val (_, rest) = Substring.position "*)" after
                            in
                                if Substring.isEmpty rest then
                                    default ()
                                else
                                    let
                                        val (arg, source) = untilEnd (Substring.slice (rest, 3, NONE))
                                        val () = (TextIO.outputSubstr (eval, befor);
                                                  TextIO.output (gen, safe befor))
                                        val (count, skip) =
                                            case Substring.string command of
                                                "hide" => (TextIO.outputSubstr (eval, arg);
                                                           (count, true))
                                              | "eval" => (TextIO.output (eval, "val _eval");
                                                           TextIO.output (eval, Int.toString count);
                                                           TextIO.output (eval, " = ");
                                                           TextIO.outputSubstr (eval, arg);
                                                           TextIO.output (eval, "\n\n");

                                                           TextIO.output (gen, safe arg);
                                                           TextIO.output (gen, "== {[_eval");
                                                           TextIO.output (gen, Int.toString count);
                                                           TextIO.output (gen, "]}");

                                                           (count + 1, false))
                                              | s => raise Fail ("Unknown tutorial directive: " ^ s)
                                    in
                                        doDirectives (count, if skip then
                                                                 #2 (Substring.splitl Char.isSpace source)
                                                             else
                                                                 source)
                                    end
                            end
                    end
            end
    in
        doDirectives (0, readAll inf);
        TextIO.closeOut gen;

        TextIO.output (eval, "\n\nfun main () : transaction page =\nreturn <xml><body>");
        TextIO.outputSubstr (eval, readAllFile "/tmp/gen.ur");
        TextIO.output (eval, "</body></xml>");
        TextIO.closeOut eval;

        if Compiler.compile "/tmp/eval" then
            let
                val proc = Unix.execute ("/bin/sh", ["-c", "/tmp/eval.exe /main"])
                val inf = Unix.textInstreamOf proc
                val s = readAll inf
                val _ = Unix.reap proc

                val (befor, after) = Substring.position "<sc>" s
            in
                if Substring.isEmpty after then
                    print ("Bad output for " ^ fname ^ "! [1]\n")
                else
                    let
                        val after = Substring.slice (after, 4, NONE)
                        val (befor, after) = Substring.position "</body>" after
                    in
                        if Substring.isEmpty after then
                            print ("Bad output for " ^ fname ^ "! [2]\n")
                        else
                            let
                                val outf = TextIO.openOut "/tmp/final.ur"

                                fun eatNls source =
                                    let
                                        val (befor, after) = Substring.position "(*NL*)" source
                                    in
                                        if Substring.isEmpty after then
                                            TextIO.outputSubstr (outf, source)
                                        else
                                            (TextIO.outputSubstr (outf, befor);
                                             eatNls (Substring.slice (after, 6, NONE)))
                                    end

                                val cmd = "emacs --eval \"(progn "
                                          ^ "(global-font-lock-mode t) "
                                          ^ "(add-to-list 'load-path \\\""
                                          ^ Config.sitelisp
                                          ^ "/\\\") "
                                          ^ "(load \\\"urweb-mode-startup\\\") "
                                          ^ "(urweb-mode) "
                                          ^ "(find-file \\\"/tmp/final2.ur\\\") "
                                          ^ "(switch-to-buffer (htmlize-buffer)) "
                                          ^ "(write-file \\\"/tmp/final.html\\\") "
                                          ^ "(kill-emacs))\""
                            in
                                eatNls befor;
                                TextIO.closeOut outf;
                                ignore (OS.Process.system "sed -e 's/&lt;/</g;s/&amp;/\\&/g' </tmp/final.ur >/tmp/final2.ur");
                                ignore (OS.Process.system cmd);
                                fixupFile (fname, title)
                            end
                    end
            end
        else
            ()
    end

fun make dirname =
    let
        val dir = OS.FileSys.openDir dirname

        fun doDir () =
            case OS.FileSys.readDir dir of
                NONE => OS.FileSys.closeDir dir
              | SOME fname =>
                (if OS.Path.ext fname = SOME "ur" then
                     doUr (OS.Path.joinDirFile {dir = dirname, file = fname})
                 else
                     ();
                 doDir ())
    in
        Settings.setProtocol "static";
        doDir ()
    end

end