-
Notifications
You must be signed in to change notification settings - Fork 0
/
eww.el
1347 lines (1227 loc) · 41.6 KB
/
eww.el
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
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;;; eww.el --- Emacs Web Wowser
;; Copyright (C) 2013-2014 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: html
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs 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 General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(require 'format-spec)
(require 'shr)
(require 'url)
(require 'mm-url)
(defgroup eww nil
"Emacs Web Wowser"
:version "24.4"
:link '(custom-manual "(eww) Top")
:group 'hypermedia
:prefix "eww-")
(defcustom eww-header-line-format "%t: %u"
"Header line format.
- %t is replaced by the title.
- %u is replaced by the URL."
:version "24.4"
:group 'eww
:type 'string)
(defcustom eww-search-prefix "https://duckduckgo.com/html/?q="
"Prefix URL to search engine"
:version "24.4"
:group 'eww
:type 'string)
(defcustom eww-download-directory "~/Downloads/"
"Directory where files will downloaded."
:version "24.4"
:group 'eww
:type 'string)
(defcustom eww-use-external-browser-for-content-type
"\\`\\(video/\\|audio/\\|application/ogg\\)"
"Always use external browser for specified content-type."
:version "24.4"
:group 'eww
:type '(choice (const :tag "Never" nil)
regexp))
(defcustom eww-form-checkbox-selected-symbol "[X]"
"Symbol used to represent a selected checkbox.
See also `eww-form-checkbox-symbol'."
:version "24.4"
:group 'eww
:type '(choice (const "[X]")
(const "☒") ; Unicode BALLOT BOX WITH X
(const "☑") ; Unicode BALLOT BOX WITH CHECK
string))
(defcustom eww-form-checkbox-symbol "[ ]"
"Symbol used to represent a checkbox.
See also `eww-form-checkbox-selected-symbol'."
:version "24.4"
:group 'eww
:type '(choice (const "[ ]")
(const "☐") ; Unicode BALLOT BOX
string))
(defface eww-form-submit
'((((type x w32 ns) (class color)) ; Like default mode line
:box (:line-width 2 :style released-button)
:background "#808080" :foreground "black"))
"Face for eww buffer buttons."
:version "24.4"
:group 'eww)
(defface eww-form-checkbox
'((((type x w32 ns) (class color)) ; Like default mode line
:box (:line-width 2 :style released-button)
:background "lightgrey" :foreground "black"))
"Face for eww buffer buttons."
:version "24.4"
:group 'eww)
(defface eww-form-select
'((((type x w32 ns) (class color)) ; Like default mode line
:box (:line-width 2 :style released-button)
:background "lightgrey" :foreground "black"))
"Face for eww buffer buttons."
:version "24.4"
:group 'eww)
(defface eww-form-text
'((t (:background "#505050"
:foreground "white"
:box (:line-width 1))))
"Face for eww text inputs."
:version "24.4"
:group 'eww)
(defface eww-form-textarea
'((t (:background "#C0C0C0"
:foreground "black"
:box (:line-width 1))))
"Face for eww textarea inputs."
:version "24.4"
:group 'eww)
(defvar eww-current-url nil)
(defvar eww-current-dom nil)
(defvar eww-current-source nil)
(defvar eww-current-title ""
"Title of current page.")
(defvar eww-history nil)
(defvar eww-history-position 0)
(defvar eww-next-url nil)
(defvar eww-previous-url nil)
(defvar eww-up-url nil)
(defvar eww-home-url nil)
(defvar eww-start-url nil)
(defvar eww-contents-url nil)
(defvar eww-local-regex "localhost"
"When this regex is found in the URL, it's not a keyword but an address.")
(defvar eww-link-keymap
(let ((map (copy-keymap shr-map)))
(define-key map "\r" 'eww-follow-link)
map))
;;;###autoload
(defun eww (url)
"Fetch URL and render the page.
If the input doesn't look like an URL or a domain name, the
word(s) will be searched for via `eww-search-prefix'."
(interactive "sEnter URL or keywords: ")
(cond ((string-match-p "\\`file://" url))
((string-match-p "\\`ftp://" url)
(user-error "FTP is not supported."))
(t
(if (and (= (length (split-string url)) 1)
(or (and (not (string-match-p "\\`[\"\'].*[\"\']\\'" url))
(> (length (split-string url "\\.")) 1))
(string-match eww-local-regex url)))
(progn
(unless (string-match-p "\\`[a-zA-Z][-a-zA-Z0-9+.]*://" url)
(setq url (concat "http://" url)))
;; some site don't redirect final /
(when (string= (url-filename (url-generic-parse-url url)) "")
(setq url (concat url "/"))))
(setq url (concat eww-search-prefix
(replace-regexp-in-string " " "+" url))))))
(url-retrieve url 'eww-render (list url)))
;;;###autoload (defalias 'browse-web 'eww)
;;;###autoload
(defun eww-open-file (file)
"Render a file using EWW."
(interactive "fFile: ")
(eww (concat "file://"
(and (memq system-type '(windows-nt ms-dos))
"/")
(expand-file-name file))))
(defun eww-render (status url &optional point)
(let ((redirect (plist-get status :redirect)))
(when redirect
(setq url redirect)))
(let* ((headers (eww-parse-headers))
(content-type
(mail-header-parse-content-type
(or (cdr (assoc "content-type" headers))
"text/plain")))
(charset (intern
(downcase
(or (cdr (assq 'charset (cdr content-type)))
(eww-detect-charset (equal (car content-type)
"text/html"))
"utf8"))))
(data-buffer (current-buffer)))
(unwind-protect
(progn
(setq eww-current-title "")
(cond
((and eww-use-external-browser-for-content-type
(string-match-p eww-use-external-browser-for-content-type
(car content-type)))
(eww-browse-with-external-browser url))
((equal (car content-type) "text/html")
(eww-display-html charset url nil point))
((string-match-p "\\`image/" (car content-type))
(eww-display-image)
(eww-update-header-line-format))
(t
(eww-display-raw)
(eww-update-header-line-format)))
(setq eww-current-url url
eww-history-position 0))
(kill-buffer data-buffer))))
(defun eww-parse-headers ()
(let ((headers nil))
(goto-char (point-min))
(while (and (not (eobp))
(not (eolp)))
(when (looking-at "\\([^:]+\\): *\\(.*\\)")
(push (cons (downcase (match-string 1))
(match-string 2))
headers))
(forward-line 1))
(unless (eobp)
(forward-line 1))
headers))
(defun eww-detect-charset (html-p)
(let ((case-fold-search t)
(pt (point)))
(or (and html-p
(re-search-forward
"<meta[\t\n\r ]+[^>]*charset=\"?\\([^\t\n\r \"/>]+\\)[\\\"'.*]" nil t)
(goto-char pt)
(match-string 1))
(and (looking-at
"[\t\n\r ]*<\\?xml[\t\n\r ]+[^>]*encoding=\"\\([^\"]+\\)")
(match-string 1)))))
(declare-function libxml-parse-html-region "xml.c"
(start end &optional base-url))
(defun eww-display-html (charset url &optional document point)
(or (fboundp 'libxml-parse-html-region)
(error "This function requires Emacs to be compiled with libxml2"))
(unless (eq charset 'utf8)
(condition-case nil
(decode-coding-region (point) (point-max) charset)
(coding-system-error nil)))
(let ((document
(or document
(list
'base (list (cons 'href url))
(libxml-parse-html-region (point) (point-max))))))
(setq eww-current-source (buffer-substring (point) (point-max)))
(eww-setup-buffer)
(setq eww-current-dom document)
(let ((inhibit-read-only t)
(after-change-functions nil)
(shr-width nil)
(shr-target-id (url-target (url-generic-parse-url url)))
(shr-external-rendering-functions
'((title . eww-tag-title)
(form . eww-tag-form)
(input . eww-tag-input)
(textarea . eww-tag-textarea)
(body . eww-tag-body)
(select . eww-tag-select)
(link . eww-tag-link)
(a . eww-tag-a))))
(shr-insert-document document)
(cond
(point
(goto-char point))
(shr-target-id
(goto-char (point-min))
(let ((point (next-single-property-change
(point-min) 'shr-target-id)))
(when point
(goto-char point))))
(t
(goto-char (point-min)))))
(setq eww-current-url url
eww-history-position 0)
(eww-update-header-line-format)))
(defun eww-handle-link (cont)
(let* ((rel (assq :rel cont))
(href (assq :href cont))
(where (assoc
;; The text associated with :rel is case-insensitive.
(if rel (downcase (cdr rel)))
'(("next" . eww-next-url)
;; Texinfo uses "previous", but HTML specifies
;; "prev", so recognize both.
("previous" . eww-previous-url)
("prev" . eww-previous-url)
;; HTML specifies "start" but also "contents",
;; and Gtk seems to use "home". Recognize
;; them all; but store them in different
;; variables so that we can readily choose the
;; "best" one.
("start" . eww-start-url)
("home" . eww-home-url)
("contents" . eww-contents-url)
("up" . eww-up-url)))))
(and href
where
(set (cdr where) (cdr href)))))
(defun eww-tag-link (cont)
(eww-handle-link cont)
(shr-generic cont))
(defun eww-tag-a (cont)
(eww-handle-link cont)
(let ((start (point)))
(shr-tag-a cont)
(put-text-property start (point) 'keymap eww-link-keymap)))
(defun eww-update-header-line-format ()
(if eww-header-line-format
(setq header-line-format
(replace-regexp-in-string
"%" "%%"
;; FIXME? Title can be blank. Default to, eg, last component
;; of url?
(format-spec eww-header-line-format
`((?u . ,eww-current-url)
(?t . ,eww-current-title)))))
(setq header-line-format nil)))
(defun eww-tag-title (cont)
(setq eww-current-title "")
(dolist (sub cont)
(when (eq (car sub) 'text)
(setq eww-current-title (concat eww-current-title (cdr sub)))))
(eww-update-header-line-format))
(defun eww-tag-body (cont)
(let* ((start (point))
(fgcolor (cdr (or (assq :fgcolor cont)
(assq :text cont))))
(bgcolor (cdr (assq :bgcolor cont)))
(shr-stylesheet (list (cons 'color fgcolor)
(cons 'background-color bgcolor))))
(shr-generic cont)
(eww-colorize-region start (point) fgcolor bgcolor)))
(defun eww-colorize-region (start end fg &optional bg)
(when (or fg bg)
(let ((new-colors (shr-color-check fg bg)))
(when new-colors
(when fg
(add-face-text-property start end
(list :foreground (cadr new-colors))
t))
(when bg
(add-face-text-property start end
(list :background (car new-colors))
t))))))
(defun eww-display-raw ()
(let ((data (buffer-substring (point) (point-max))))
(eww-setup-buffer)
(let ((inhibit-read-only t))
(insert data))
(goto-char (point-min))))
(defun eww-display-image ()
(let ((data (shr-parse-image-data)))
(eww-setup-buffer)
(let ((inhibit-read-only t))
(shr-put-image data nil))
(goto-char (point-min))))
(defun eww-setup-buffer ()
(switch-to-buffer (get-buffer-create "*eww*"))
(let ((inhibit-read-only t))
(remove-overlays)
(erase-buffer))
(unless (eq major-mode 'eww-mode)
(eww-mode))
(setq-local eww-next-url nil)
(setq-local eww-previous-url nil)
(setq-local eww-up-url nil)
(setq-local eww-home-url nil)
(setq-local eww-start-url nil)
(setq-local eww-contents-url nil))
(defun eww-view-source ()
(interactive)
(let ((buf (get-buffer-create "*eww-source*"))
(source eww-current-source))
(with-current-buffer buf
(delete-region (point-min) (point-max))
(insert (or eww-current-source "no source"))
(goto-char (point-min))
(when (fboundp 'html-mode)
(html-mode)))
(view-buffer buf)))
(defvar eww-mode-map
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(define-key map "q" 'quit-window)
(define-key map "g" 'eww-reload)
(define-key map [?\t] 'shr-next-link)
(define-key map [?\M-\t] 'shr-previous-link)
(define-key map [delete] 'scroll-down-command)
(define-key map [?\S-\ ] 'scroll-down-command)
(define-key map "\177" 'scroll-down-command)
(define-key map " " 'scroll-up-command)
(define-key map "l" 'eww-back-url)
(define-key map "r" 'eww-forward-url)
(define-key map "n" 'eww-next-url)
(define-key map "p" 'eww-previous-url)
(define-key map "u" 'eww-up-url)
(define-key map "t" 'eww-top-url)
(define-key map "&" 'eww-browse-with-external-browser)
(define-key map "d" 'eww-download)
(define-key map "w" 'eww-copy-page-url)
(define-key map "C" 'url-cookie-list)
(define-key map "v" 'eww-view-source)
(define-key map "H" 'eww-list-histories)
(define-key map "b" 'eww-add-bookmark)
(define-key map "B" 'eww-list-bookmarks)
(define-key map [(meta n)] 'eww-next-bookmark)
(define-key map [(meta p)] 'eww-previous-bookmark)
(easy-menu-define nil map ""
'("Eww"
["Exit" eww-quit t]
["Close browser" quit-window t]
["Reload" eww-reload t]
["Back to previous page" eww-back-url
:active (not (zerop (length eww-history)))]
["Forward to next page" eww-forward-url
:active (not (zerop eww-history-position))]
["Browse with external browser" eww-browse-with-external-browser t]
["Download" eww-download t]
["View page source" eww-view-source]
["Copy page URL" eww-copy-page-url t]
["List histories" eww-list-histories t]
["Add bookmark" eww-add-bookmark t]
["List bookmarks" eww-list-bookmarks t]
["List cookies" url-cookie-list t]))
map))
(defvar eww-tool-bar-map
(let ((map (make-sparse-keymap)))
(dolist (tool-bar-item
'((eww-quit . "close")
(eww-reload . "refresh")
(eww-back-url . "left-arrow")
(eww-forward-url . "right-arrow")
(eww-view-source . "show")
(eww-copy-page-url . "copy")
(eww-add-bookmark . "bookmark_add"))) ;; ...
(tool-bar-local-item-from-menu
(car tool-bar-item) (cdr tool-bar-item) map eww-mode-map))
map)
"Tool bar for `eww-mode'.")
(define-derived-mode eww-mode nil "eww"
"Mode for browsing the web.
\\{eww-mode-map}"
;; FIXME? This seems a strange default.
(setq-local eww-current-url 'author)
(setq-local eww-current-dom nil)
(setq-local eww-current-source nil)
(setq-local browse-url-browser-function 'eww-browse-url)
(setq-local after-change-functions 'eww-process-text-input)
(setq-local eww-history nil)
(setq-local eww-history-position 0)
(when (boundp 'tool-bar-map)
(setq-local tool-bar-map eww-tool-bar-map))
(buffer-disable-undo)
;;(setq buffer-read-only t)
)
;;;###autoload
(defun eww-browse-url (url &optional _new-window)
(when (and (equal major-mode 'eww-mode)
eww-current-url)
(eww-save-history))
(eww url))
(defun eww-back-url ()
"Go to the previously displayed page."
(interactive)
(when (>= eww-history-position (length eww-history))
(user-error "No previous page"))
(eww-save-history)
(setq eww-history-position (+ eww-history-position 2))
(eww-restore-history (elt eww-history (1- eww-history-position))))
(defun eww-forward-url ()
"Go to the next displayed page."
(interactive)
(when (zerop eww-history-position)
(user-error "No next page"))
(eww-save-history)
(eww-restore-history (elt eww-history (1- eww-history-position))))
(defun eww-restore-history (elem)
(let ((inhibit-read-only t))
(erase-buffer)
(insert (plist-get elem :text))
(setq eww-current-source (plist-get elem :source))
(setq eww-current-dom (plist-get elem :dom))
(goto-char (plist-get elem :point))
(setq eww-current-url (plist-get elem :url)
eww-current-title (plist-get elem :title))
(eww-update-header-line-format)))
(defun eww-next-url ()
"Go to the page marked `next'.
A page is marked `next' if rel=\"next\" appears in a <link>
or <a> tag."
(interactive)
(if eww-next-url
(eww-browse-url (shr-expand-url eww-next-url eww-current-url))
(user-error "No `next' on this page")))
(defun eww-previous-url ()
"Go to the page marked `previous'.
A page is marked `previous' if rel=\"previous\" appears in a <link>
or <a> tag."
(interactive)
(if eww-previous-url
(eww-browse-url (shr-expand-url eww-previous-url eww-current-url))
(user-error "No `previous' on this page")))
(defun eww-up-url ()
"Go to the page marked `up'.
A page is marked `up' if rel=\"up\" appears in a <link>
or <a> tag."
(interactive)
(if eww-up-url
(eww-browse-url (shr-expand-url eww-up-url eww-current-url))
(user-error "No `up' on this page")))
(defun eww-top-url ()
"Go to the page marked `top'.
A page is marked `top' if rel=\"start\", rel=\"home\", or rel=\"contents\"
appears in a <link> or <a> tag."
(interactive)
(let ((best-url (or eww-start-url
eww-contents-url
eww-home-url)))
(if best-url
(eww-browse-url (shr-expand-url best-url eww-current-url))
(user-error "No `top' for this page"))))
(defun eww-reload ()
"Reload the current page."
(interactive)
(url-retrieve eww-current-url 'eww-render
(list eww-current-url (point))))
;; Form support.
(defvar eww-form nil)
(defvar eww-submit-map
(let ((map (make-sparse-keymap)))
(define-key map "\r" 'eww-submit)
(define-key map [(control c) (control c)] 'eww-submit)
map))
(defvar eww-checkbox-map
(let ((map (make-sparse-keymap)))
(define-key map " " 'eww-toggle-checkbox)
(define-key map "\r" 'eww-toggle-checkbox)
(define-key map [(control c) (control c)] 'eww-submit)
map))
(defvar eww-text-map
(let ((map (make-keymap)))
(set-keymap-parent map text-mode-map)
(define-key map "\r" 'eww-submit)
(define-key map [(control a)] 'eww-beginning-of-text)
(define-key map [(control c) (control c)] 'eww-submit)
(define-key map [(control e)] 'eww-end-of-text)
(define-key map [?\t] 'shr-next-link)
(define-key map [?\M-\t] 'shr-previous-link)
map))
(defvar eww-textarea-map
(let ((map (make-keymap)))
(set-keymap-parent map text-mode-map)
(define-key map "\r" 'forward-line)
(define-key map [(control c) (control c)] 'eww-submit)
(define-key map [?\t] 'shr-next-link)
(define-key map [?\M-\t] 'shr-previous-link)
map))
(defvar eww-select-map
(let ((map (make-sparse-keymap)))
(define-key map "\r" 'eww-change-select)
(define-key map [(control c) (control c)] 'eww-submit)
map))
(defun eww-beginning-of-text ()
"Move to the start of the input field."
(interactive)
(goto-char (eww-beginning-of-field)))
(defun eww-end-of-text ()
"Move to the end of the text in the input field."
(interactive)
(goto-char (eww-end-of-field))
(let ((start (eww-beginning-of-field)))
(while (and (equal (following-char) ? )
(> (point) start))
(forward-char -1))
(when (> (point) start)
(forward-char 1))))
(defun eww-beginning-of-field ()
(cond
((bobp)
(point))
((not (eq (get-text-property (point) 'eww-form)
(get-text-property (1- (point)) 'eww-form)))
(point))
(t
(previous-single-property-change
(point) 'eww-form nil (point-min)))))
(defun eww-end-of-field ()
(1- (next-single-property-change
(point) 'eww-form nil (point-max))))
(defun eww-tag-form (cont)
(let ((eww-form
(list (assq :method cont)
(assq :action cont)))
(start (point)))
(shr-ensure-paragraph)
(shr-generic cont)
(unless (bolp)
(insert "\n"))
(insert "\n")
(when (> (point) start)
(put-text-property start (1+ start)
'eww-form eww-form))))
(defun eww-form-submit (cont)
(let ((start (point))
(value (cdr (assq :value cont))))
(setq value
(if (zerop (length value))
"Submit"
value))
(insert value)
(add-face-text-property start (point) 'eww-form-submit)
(put-text-property start (point) 'eww-form
(list :eww-form eww-form
:value value
:type "submit"
:name (cdr (assq :name cont))))
(put-text-property start (point) 'keymap eww-submit-map)
(insert " ")))
(defun eww-form-checkbox (cont)
(let ((start (point)))
(if (cdr (assq :checked cont))
(insert eww-form-checkbox-selected-symbol)
(insert eww-form-checkbox-symbol))
(add-face-text-property start (point) 'eww-form-checkbox)
(put-text-property start (point) 'eww-form
(list :eww-form eww-form
:value (cdr (assq :value cont))
:type (downcase (cdr (assq :type cont)))
:checked (cdr (assq :checked cont))
:name (cdr (assq :name cont))))
(put-text-property start (point) 'keymap eww-checkbox-map)
(insert " ")))
(defun eww-form-text (cont)
(let ((start (point))
(type (downcase (or (cdr (assq :type cont))
"text")))
(value (or (cdr (assq :value cont)) ""))
(width (string-to-number
(or (cdr (assq :size cont))
"40")))
(readonly-property (if (or (cdr (assq :disabled cont))
(cdr (assq :readonly cont)))
'read-only
'inhibit-read-only)))
(insert value)
(when (< (length value) width)
(insert (make-string (- width (length value)) ? )))
(put-text-property start (point) 'face 'eww-form-text)
(put-text-property start (point) 'local-map eww-text-map)
(put-text-property start (point) readonly-property t)
(put-text-property start (point) 'eww-form
(list :eww-form eww-form
:value value
:type type
:name (cdr (assq :name cont))))
(insert " ")))
(defconst eww-text-input-types '("text" "password" "textarea"
"color" "date" "datetime" "datetime-local"
"email" "month" "number" "search" "tel"
"time" "url" "week")
"List of input types which represent a text input.
See URL `https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input'.")
(defun eww-process-text-input (beg end length)
(let* ((form (get-text-property (min (1+ end) (point-max)) 'eww-form))
(properties (text-properties-at end))
(type (plist-get form :type)))
(when (and form
(member type eww-text-input-types))
(cond
((zerop length)
;; Delete some space at the end.
(save-excursion
(goto-char
(if (equal type "textarea")
(1- (line-end-position))
(eww-end-of-field)))
(let ((new (- end beg)))
(while (and (> new 0)
(eql (following-char) ? ))
(delete-region (point) (1+ (point)))
(setq new (1- new))))
(set-text-properties beg end properties)))
((> length 0)
;; Add padding.
(save-excursion
(goto-char
(if (equal type "textarea")
(1- (line-end-position))
(eww-end-of-field)))
(let ((start (point)))
(insert (make-string length ? ))
(set-text-properties start (point) properties)))))
(let ((value (buffer-substring-no-properties
(eww-beginning-of-field)
(eww-end-of-field))))
(when (string-match " +\\'" value)
(setq value (substring value 0 (match-beginning 0))))
(plist-put form :value value)
(when (equal type "password")
;; Display passwords as asterisks.
(let ((start (eww-beginning-of-field)))
(put-text-property start (+ start (length value))
'display (make-string (length value) ?*))))))))
(defun eww-tag-textarea (cont)
(let ((start (point))
(value (or (cdr (assq :value cont)) ""))
(lines (string-to-number
(or (cdr (assq :rows cont))
"10")))
(width (string-to-number
(or (cdr (assq :cols cont))
"10")))
end)
(shr-ensure-newline)
(insert value)
(shr-ensure-newline)
(when (< (count-lines start (point)) lines)
(dotimes (i (- lines (count-lines start (point))))
(insert "\n")))
(setq end (point-marker))
(goto-char start)
(while (< (point) end)
(end-of-line)
(let ((pad (- width (- (point) (line-beginning-position)))))
(when (> pad 0)
(insert (make-string pad ? ))))
(add-face-text-property (line-beginning-position)
(point) 'eww-form-textarea)
(put-text-property (line-beginning-position) (point)
'local-map eww-textarea-map)
(forward-line 1))
(put-text-property start (point) 'eww-form
(list :eww-form eww-form
:value value
:type "textarea"
:name (cdr (assq :name cont))))))
(defun eww-tag-input (cont)
(let ((type (downcase (or (cdr (assq :type cont))
"text")))
(start (point)))
(cond
((or (equal type "checkbox")
(equal type "radio"))
(eww-form-checkbox cont))
((equal type "submit")
(eww-form-submit cont))
((equal type "hidden")
(let ((form eww-form)
(name (cdr (assq :name cont))))
;; Don't add <input type=hidden> elements repeatedly.
(while (and form
(or (not (consp (car form)))
(not (eq (caar form) 'hidden))
(not (equal (plist-get (cdr (car form)) :name)
name))))
(setq form (cdr form)))
(unless form
(nconc eww-form (list
(list 'hidden
:name name
:value (cdr (assq :value cont))))))))
(t
(eww-form-text cont)))
(unless (= start (point))
(put-text-property start (1+ start) 'help-echo "Input field"))))
(defun eww-tag-select (cont)
(shr-ensure-paragraph)
(let ((menu (list :name (cdr (assq :name cont))
:eww-form eww-form))
(options nil)
(start (point))
(max 0)
opelem)
(if (eq (car (car cont)) 'optgroup)
(dolist (groupelem cont)
(unless (cdr (assq :disabled (cdr groupelem)))
(setq opelem (append opelem (cdr (cdr groupelem))))))
(setq opelem cont))
(dolist (elem opelem)
(when (eq (car elem) 'option)
(when (cdr (assq :selected (cdr elem)))
(nconc menu (list :value
(cdr (assq :value (cdr elem))))))
(let ((display (or (cdr (assq 'text (cdr elem))) "")))
(setq max (max max (length display)))
(push (list 'item
:value (cdr (assq :value (cdr elem)))
:display display)
options))))
(when options
(setq options (nreverse options))
;; If we have no selected values, default to the first value.
(unless (plist-get menu :value)
(nconc menu (list :value (nth 2 (car options)))))
(nconc menu options)
(let ((selected (eww-select-display menu)))
(insert selected
(make-string (- max (length selected)) ? )))
(put-text-property start (point) 'eww-form menu)
(add-face-text-property start (point) 'eww-form-select)
(put-text-property start (point) 'keymap eww-select-map)
(unless (= start (point))
(put-text-property start (1+ start) 'help-echo "select field"))
(shr-ensure-paragraph))))
(defun eww-select-display (select)
(let ((value (plist-get select :value))
display)
(dolist (elem select)
(when (and (consp elem)
(eq (car elem) 'item)
(equal value (plist-get (cdr elem) :value)))
(setq display (plist-get (cdr elem) :display))))
display))
(defun eww-change-select ()
"Change the value of the select drop-down menu under point."
(interactive)
(let* ((input (get-text-property (point) 'eww-form))
(completion-ignore-case t)
(options
(delq nil
(mapcar (lambda (elem)
(and (consp elem)
(eq (car elem) 'item)
(cons (plist-get (cdr elem) :display)
(plist-get (cdr elem) :value))))
input)))
(display
(completing-read "Change value: " options nil 'require-match))
(inhibit-read-only t))
(plist-put input :value (cdr (assoc-string display options t)))
(goto-char
(eww-update-field display))))
(defun eww-update-field (string)
(let ((properties (text-properties-at (point)))
(start (eww-beginning-of-field))
(end (1+ (eww-end-of-field))))
(delete-region start end)
(insert string
(make-string (- (- end start) (length string)) ? ))
(set-text-properties start end properties)
start))
(defun eww-toggle-checkbox ()
"Toggle the value of the checkbox under point."
(interactive)
(let* ((input (get-text-property (point) 'eww-form))
(type (plist-get input :type)))
(if (equal type "checkbox")
(goto-char
(1+
(if (plist-get input :checked)
(progn
(plist-put input :checked nil)
(eww-update-field eww-form-checkbox-symbol))
(plist-put input :checked t)
(eww-update-field eww-form-checkbox-selected-symbol))))
;; Radio button. Switch all other buttons off.
(let ((name (plist-get input :name)))
(save-excursion
(dolist (elem (eww-inputs (plist-get input :eww-form)))
(when (equal (plist-get (cdr elem) :name) name)
(goto-char (car elem))
(if (not (eq (cdr elem) input))
(progn
(plist-put input :checked nil)
(eww-update-field eww-form-checkbox-symbol))
(plist-put input :checked t)
(eww-update-field eww-form-checkbox-selected-symbol)))))
(forward-char 1)))))
(defun eww-inputs (form)
(let ((start (point-min))
(inputs nil))
(while (and start
(< start (point-max)))
(when (or (get-text-property start 'eww-form)
(setq start (next-single-property-change start 'eww-form)))
(when (eq (plist-get (get-text-property start 'eww-form) :eww-form)
form)
(push (cons start (get-text-property start 'eww-form))
inputs))
(setq start (next-single-property-change start 'eww-form))))
(nreverse inputs)))
(defun eww-input-value (input)
(let ((type (plist-get input :type))
(value (plist-get input :value)))
(cond
((equal type "textarea")
(with-temp-buffer
(insert value)
(goto-char (point-min))
(while (re-search-forward "^ +\n\\| +$" nil t)
(replace-match "" t t))
(buffer-string)))
(t
(if (string-match " +\\'" value)
(substring value 0 (match-beginning 0))
value)))))
(defun eww-submit ()
"Submit the current form."
(interactive)
(let* ((this-input (get-text-property (point) 'eww-form))
(form (plist-get this-input :eww-form))
values next-submit)
(dolist (elem (sort (eww-inputs form)
(lambda (o1 o2)
(< (car o1) (car o2)))))
(let* ((input (cdr elem))
(input-start (car elem))
(name (plist-get input :name)))
(when name
(cond
((member (plist-get input :type) '("checkbox" "radio"))
(when (plist-get input :checked)
(push (cons name (plist-get input :value))
values)))
((equal (plist-get input :type) "submit")
;; We want the values from buttons if we hit a button if
;; we hit enter on it, or if it's the first button after
;; the field we did hit return on.
(when (or (eq input this-input)
(and (not (eq input this-input))
(null next-submit)
(> input-start (point))))
(setq next-submit t)
(push (cons name (plist-get input :value))
values)))
(t
(push (cons name (eww-input-value input))
values))))))
(dolist (elem form)
(when (and (consp elem)