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
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
|
;; xhtmlgen.lisp
;; This version by david@lichteblau.com for headcraft (http://headcraft.de/)
;;
;; Derived from htmlgen.cl:
;; copyright (c) 1986-2000 Franz Inc, Berkeley, CA
;;
;; This code is free software; you can redistribute it and/or
;; modify it under the terms of the version 2.1 of
;; the GNU Lesser General Public License as published by
;; the Free Software Foundation, as clarified by the AllegroServe
;; prequel found in license-allegroserve.txt.
;;
;; This code is distributed in the hope that it will be useful,
;; but without any warranty; without even the implied warranty of
;; merchantability or fitness for a particular purpose. See the GNU
;; Lesser General Public License for more details.
;;
;; Version 2.1 of the GNU Lesser General Public License is in the file
;; license-lgpl.txt that was distributed with this file.
;; If it is not present, you can access it from
;; http://www.gnu.org/copyleft/lesser.txt (until superseded by a newer
;; version) or write to the Free Software Foundation, Inc., 59 Temple Place,
;; Suite 330, Boston, MA 02111-1307 USA
(defpackage :xhtml-generator
(:use :common-lisp)
(:export #:with-html #:write-doctype))
(in-package :xhtml-generator)
;; html generation
(defstruct (html-process (:type list) (:constructor
make-html-process (key macro special
name-attr
)))
key ; keyword naming this tag
macro ; the macro to define this
special ; if true then call this to process the keyword and return
; the macroexpansion
name-attr ; attribute symbols which can name this object for subst purposes
)
(defparameter *html-process-table*
(make-hash-table :test #'equal) ; #'eq is accurate but want to avoid rehashes
)
(defvar *html-sink*)
(defun write-doctype (sink)
(sax:start-dtd sink
"html"
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd")
(sax:end-dtd sink))
(defmacro with-html (sink &rest forms &environment env)
`(let ((*html-sink* ,sink))
,(process-html-forms forms env)))
(defun get-process (form)
(let ((ent (gethash form *html-process-table*)))
(unless ent
(error "unknown html keyword ~s" form))
ent))
(defun process-html-forms (forms env)
(let (res)
(flet ((do-ent (ent args argsp body)
;; ent is an html-process object associated with the
;; html tag we're processing
;; args is the list of values after the tag in the form
;; ((:tag &rest args) ....)
;; argsp is true if this isn't a singleton tag (i.e. it has
;; a body) .. (:tag ...) or ((:tag ...) ...)
;; body is the body if any of the form
;;
(let ((special (html-process-special ent)))
(push (if special
(funcall special ent args argsp body)
`(,(html-process-macro ent)
,args
,(process-html-forms body env)))
res))))
(do* ((xforms forms (cdr xforms))
(form (car xforms) (car xforms)))
((null xforms))
(setq form (macroexpand form env))
(if (atom form)
(typecase form
(keyword (do-ent (get-process form) nil nil nil))
(string (push `(sax:characters *html-sink* ,form) res))
(t (push form res)))
(let ((first (car form)))
(cond
((keywordp first)
;; (:xxx . body) form
(do-ent (get-process (car form)) nil t (cdr form)))
((and (consp first) (keywordp (car first)))
;; ((:xxx args ) . body)
(do-ent (get-process (caar form)) (cdr first) t (cdr form)))
(t
(push form res)))))))
`(progn ,@(nreverse res))))
(defun html-body-key-form (string-code args body)
(unless (evenp (length args))
(error "attribute list ~S isn't even" args))
`(let ((.tagname. ,string-code))
(sax:start-element *html-sink* nil nil .tagname.
(list
,@(loop
for (name value) on args by #'cddr
collect
`(sax:make-attribute
:qname ,(etypecase name
(symbol (symbol-name name))
(string name))
:value ,value
:specified-p t))))
,@body
(sax:end-element *html-sink* nil nil .tagname.)))
(defun emit-without-quoting (str)
(let ((s (cxml::chained-handler *html-sink*)))
(cxml::maybe-close-tag s)
(map nil (lambda (c) (cxml::write-rune (char-code c) s)) str)))
(defun princ-http (val)
(warn "use of deprecated :PRINC (use :PRINC-SAFE instead?)")
(emit-without-quoting (princ-to-string val)))
(defun prin1-http (val)
(warn "use of deprecated :PRIN1 (use :PRIN1-SAFE instead?)")
(emit-without-quoting (prin1-to-string val)))
(defun princ-safe-http (val)
(sax:characters *html-sink* (princ-to-string val)))
(defun prin1-safe-http (val)
(sax:characters *html-sink* (prin1-to-string val)))
;; -- defining how html tags are handled. --
;;
;; most tags are handled in a standard way and the def-std-html
;; macro is used to define such tags
;;
;; Some tags need special treatment and def-special-html defines
;; how these are handled. The tags requiring special treatment
;; are the pseudo tags we added to control operations
;; in the html generator.
;;
;;
;; tags can be found in three ways:
;; :br - singleton, no attributes, no body
;; (:b "foo") - no attributes but with a body
;; ((:a href="foo") "balh") - attributes and body
;;
(defmacro def-special-html (kwd fcn)
;; kwd - the tag we're defining behavior for.
;; fcn - function to compute the macroexpansion of a use of this
;; tag. args to fcn are:
;; ent - html-process object holding info on this tag
;; args - list of attribute-values following tag
;; argsp - true if there is a body in this use of the tag
;; body - list of body forms.
`(setf (gethash ,kwd *html-process-table*)
(make-html-process ,kwd nil ,fcn nil)))
(def-special-html :newline
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp))
(when body
(error "can't have a body with :newline -- body is ~s" body))
(emit-without-quoting (string #\newline))))
(def-special-html :princ
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp))
`(progn ,@(mapcar #'(lambda (bod)
`(princ-http ,bod))
body))))
(def-special-html :princ-safe
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp))
`(progn ,@(mapcar #'(lambda (bod)
`(princ-safe-http ,bod))
body))))
(def-special-html :prin1
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp))
`(progn ,@(mapcar #'(lambda (bod)
`(prin1-http ,bod))
body))))
(def-special-html :prin1-safe
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp))
`(progn ,@(mapcar #'(lambda (bod)
`(prin1-safe-http ,bod))
body))))
(def-special-html :comment
#'(lambda (ent args argsp body)
(declare (ignore ent args argsp body))
`(warn ":COMMENT in html macro not supported yet")))
(defmacro def-std-html (kwd name-attrs)
(let ((mac-name (intern (format nil "~a-~a" :with-html kwd)))
(string-code (string-downcase (string kwd))))
`(progn (setf (gethash ,kwd *html-process-table*)
(make-html-process ,kwd
',mac-name
nil
',name-attrs))
(defmacro ,mac-name (args &rest body)
(html-body-key-form ,string-code args body)))))
(def-std-html :a nil)
(def-std-html :abbr nil)
(def-std-html :acronym nil)
(def-std-html :address nil)
(def-std-html :applet nil)
(def-std-html :area nil)
(def-std-html :b nil)
(def-std-html :base nil)
(def-std-html :basefont nil)
(def-std-html :bdo nil)
(def-std-html :bgsound nil)
(def-std-html :big nil)
(def-std-html :blink nil)
(def-std-html :blockquote nil)
(def-std-html :body nil)
(def-std-html :br nil)
(def-std-html :button nil)
(def-std-html :caption nil)
(def-std-html :center nil)
(def-std-html :cite nil)
(def-std-html :code nil)
(def-std-html :col nil)
(def-std-html :colgroup nil)
(def-std-html :dd nil)
(def-std-html :del nil)
(def-std-html :dfn nil)
(def-std-html :dir nil)
(def-std-html :div nil)
(def-std-html :dl nil)
(def-std-html :dt nil)
(def-std-html :em nil)
(def-std-html :embed nil)
(def-std-html :fieldset nil)
(def-std-html :font nil)
(def-std-html :form :name)
(def-std-html :frame nil)
(def-std-html :frameset nil)
(def-std-html :h1 nil)
(def-std-html :h2 nil)
(def-std-html :h3 nil)
(def-std-html :h4 nil)
(def-std-html :h5 nil)
(def-std-html :h6 nil)
(def-std-html :head nil)
(def-std-html :hr nil)
(def-std-html :html nil)
(def-std-html :i nil)
(def-std-html :iframe nil)
(def-std-html :ilayer nil)
(def-std-html :img :id)
(def-std-html :input nil)
(def-std-html :ins nil)
(def-std-html :isindex nil)
(def-std-html :kbd nil)
(def-std-html :keygen nil)
(def-std-html :label nil)
(def-std-html :layer nil)
(def-std-html :legend nil)
(def-std-html :li nil)
(def-std-html :link nil)
(def-std-html :listing nil)
(def-std-html :map nil)
(def-std-html :marquee nil)
(def-std-html :menu nil)
(def-std-html :meta nil)
(def-std-html :multicol nil)
(def-std-html :nobr nil)
(def-std-html :noembed nil)
(def-std-html :noframes nil)
(def-std-html :noscript nil)
(def-std-html :object nil)
(def-std-html :ol nil)
(def-std-html :optgroup nil)
(def-std-html :option nil)
(def-std-html :p nil)
(def-std-html :param nil)
(def-std-html :plaintext nil)
(def-std-html :pre nil)
(def-std-html :q nil)
(def-std-html :s nil)
(def-std-html :samp nil)
(def-std-html :script nil)
(def-std-html :select nil)
(def-std-html :server nil)
(def-std-html :small nil)
(def-std-html :spacer nil)
(def-std-html :span :id)
(def-std-html :strike nil)
(def-std-html :strong nil)
(def-std-html :style nil)
(def-std-html :sub nil)
(def-std-html :sup nil)
(def-std-html :table :name)
(def-std-html :tbody nil)
(def-std-html :td nil)
(def-std-html :textarea nil)
(def-std-html :tfoot nil)
(def-std-html :th nil)
(def-std-html :thead nil)
(def-std-html :title nil)
(def-std-html :tr nil)
(def-std-html :tt nil)
(def-std-html :u nil)
(def-std-html :ul nil)
(def-std-html :var nil)
(def-std-html :wbr nil)
(def-std-html :xmp nil)
|
