about summary refs log blame commit diff
path: root/third_party/git/git-gui/lib/spellcheck.tcl
blob: 538d61c792defa7a8e19736039fa5a9af630125c (plain) (tree)
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






























































































































































































































































































































































































































                                                                                                     
# git-gui spellchecking support through ispell/aspell
# Copyright (C) 2008 Shawn Pearce

class spellcheck {

field s_fd      {} ; # pipe to ispell/aspell
field s_version {} ; # ispell/aspell version string
field s_lang    {} ; # current language code
field s_prog aspell; # are we actually old ispell?
field s_failed   0 ; # is $s_prog bogus and not working?

field w_text      ; # text widget we are spelling
field w_menu      ; # context menu for the widget
field s_menuidx 0 ; # last index of insertion into $w_menu

field s_i           {} ; # timer registration for _run callbacks
field s_clear        0 ; # did we erase misspelled tags yet?
field s_seen    [list] ; # lines last seen from $w_text in _run
field s_checked [list] ; # lines already checked
field s_pending [list] ; # [$line $data] sent to ispell/aspell
field s_suggest        ; # array, list of suggestions, keyed by misspelling

constructor init {pipe_fd ui_text ui_menu} {
	set w_text $ui_text
	set w_menu $ui_menu
	array unset s_suggest

	bind_button3 $w_text [cb _popup_suggest %X %Y @%x,%y]
	_connect $this $pipe_fd
	return $this
}

method _connect {pipe_fd} {
	fconfigure $pipe_fd \
		-encoding utf-8 \
		-eofchar {} \
		-translation lf

	if {[gets $pipe_fd s_version] <= 0} {
		if {[catch {close $pipe_fd} err]} {

			# Eh?  Is this actually ispell choking on aspell options?
			#
			if {$s_prog eq {aspell}
				&& [regexp -nocase {^Usage: } $err]
				&& ![catch {
						set pipe_fd [open [list | $s_prog -v] r]
						gets $pipe_fd s_version
						close $pipe_fd
				}]
				&& $s_version ne {}} {
				if {{@(#) } eq [string range $s_version 0 4]} {
					set s_version [string range $s_version 5 end]
				}
				set s_failed 1
				error_popup [strcat \
					[mc "Unsupported spell checker"] \
					":\n\n$s_version"]
				set s_version {}
				return
			}

			regsub -nocase {^Error: } $err {} err
			if {$s_fd eq {}} {
				error_popup [strcat [mc "Spell checking is unavailable"] ":\n\n$err"]
			} else {
				error_popup [strcat \
					[mc "Invalid spell checking configuration"] \
					":\n\n$err\n\n" \
					[mc "Reverting dictionary to %s." $s_lang]]
			}
		} else {
			error_popup [mc "Spell checker silently failed on startup"]
		}
		return
	}

	if {{@(#) } ne [string range $s_version 0 4]} {
		catch {close $pipe_fd}
		error_popup [strcat [mc "Unrecognized spell checker"] ":\n\n$s_version"]
		return
	}
	set s_version [string range [string trim $s_version] 5 end]
	regexp \
		{International Ispell Version .* \(but really (Aspell .*?)\)$} \
		$s_version _junk s_version
	regexp {^Aspell (\d)+\.(\d+)} $s_version _junk major minor

	puts $pipe_fd !             ; # enable terse mode

	# fetch the language
	if {$major > 0 || ($major == 0 && $minor >= 60)} {
		puts $pipe_fd {$$cr master}
		flush $pipe_fd
		gets $pipe_fd s_lang
		regexp {[/\\]([^/\\]+)\.[^\.]+$} $s_lang _ s_lang
	} else {
		set s_lang {}
	}

	if {$::default_config(gui.spellingdictionary) eq {}
	 && [get_config gui.spellingdictionary] eq {}} {
		set ::default_config(gui.spellingdictionary) $s_lang
	}

	if {$s_fd ne {}} {
		catch {close $s_fd}
	}
	set s_fd $pipe_fd

	fconfigure $s_fd -blocking 0
	fileevent $s_fd readable [cb _read]

	$w_text tag conf misspelled \
		-foreground red \
		-underline 1

	array unset s_suggest
	set s_seen    [list]
	set s_checked [list]
	set s_pending [list]
	_run $this
}

method lang {{n {}}} {
	if {$n ne {} && $s_lang ne $n && !$s_failed} {
		set spell_cmd [list |]
		lappend spell_cmd aspell
		lappend spell_cmd --master=$n
		lappend spell_cmd --mode=none
		lappend spell_cmd --encoding=UTF-8
		lappend spell_cmd pipe
		_connect $this [open $spell_cmd r+]
	}
	return $s_lang
}

method version {} {
	if {$s_version ne {}} {
		return "$s_version, $s_lang"
	}
	return {}
}

method stop {} {
	while {$s_menuidx > 0} {
		$w_menu delete 0
		incr s_menuidx -1
	}
	$w_text tag delete misspelled

	catch {close $s_fd}
	catch {after cancel $s_i}
	set s_fd {}
	set s_i {}
	set s_lang {}
}

method _popup_suggest {X Y pos} {
	while {$s_menuidx > 0} {
		$w_menu delete 0
		incr s_menuidx -1
	}

	set b_loc [$w_text index "$pos wordstart"]
	set e_loc [_wordend $this $b_loc]
	set orig  [$w_text get $b_loc $e_loc]
	set tags  [$w_text tag names $b_loc]

	if {[lsearch -exact $tags misspelled] >= 0} {
		if {[info exists s_suggest($orig)]} {
			set cnt 0
			foreach s $s_suggest($orig) {
				if {$cnt < 5} {
					$w_menu insert $s_menuidx command \
						-label $s \
						-command [cb _replace $b_loc $e_loc $s]
					incr s_menuidx
					incr cnt
				} else {
					break
				}
			}
		} else {
			$w_menu insert $s_menuidx command \
				-label [mc "No Suggestions"] \
				-state disabled
			incr s_menuidx
		}
		$w_menu insert $s_menuidx separator
		incr s_menuidx
	}

	$w_text mark set saved-insert insert
	tk_popup $w_menu $X $Y
}

method _replace {b_loc e_loc word} {
	$w_text configure -autoseparators 0
	$w_text edit separator

	$w_text delete $b_loc $e_loc
	$w_text insert $b_loc $word

	$w_text edit separator
	$w_text configure -autoseparators 1
	$w_text mark set insert saved-insert
}

method _restart_timer {} {
	set s_i [after 300 [cb _run]]
}

proc _match_length {max_line arr_name} {
	upvar $arr_name a

	if {[llength $a] > $max_line} {
		set a [lrange $a 0 $max_line]
	}
	while {[llength $a] <= $max_line} {
		lappend a {}
	}
}

method _wordend {pos} {
	set pos  [$w_text index "$pos wordend"]
	set tags [$w_text tag names $pos]
	while {[lsearch -exact $tags misspelled] >= 0} {
		set pos  [$w_text index "$pos +1c"]
		set tags [$w_text tag names $pos]
	}
	return $pos
}

method _run {} {
	set cur_pos  [$w_text index {insert -1c}]
	set cur_line [lindex [split $cur_pos .] 0]
	set max_line [lindex [split [$w_text index end] .] 0]
	_match_length $max_line s_seen
	_match_length $max_line s_checked

	# Nothing in the message buffer?  Nothing to spellcheck.
	#
	if {$cur_line == 1
	 && $max_line == 2
	 && [$w_text get 1.0 end] eq "\n"} {
		array unset s_suggest
		_restart_timer $this
		return
	}

	set active 0
	for {set n 1} {$n <= $max_line} {incr n} {
		set s [$w_text get "$n.0" "$n.end"]

		# Don't spellcheck the current line unless we are at
		# a word boundary.  The user might be typing on it.
		#
		if {$n == $cur_line
		 && ![regexp {^\W$} [$w_text get $cur_pos insert]]} {

			# If the current word is misspelled remove the tag
			# but force a spellcheck later.
			#
			set tags [$w_text tag names $cur_pos]
			if {[lsearch -exact $tags misspelled] >= 0} {
				$w_text tag remove misspelled \
					"$cur_pos wordstart" \
					[_wordend $this $cur_pos]
				lset s_seen    $n $s
				lset s_checked $n {}
			}

			continue
		}

		if {[lindex $s_seen    $n] eq $s
		 && [lindex $s_checked $n] ne $s} {
			# Don't send empty lines to Aspell it doesn't check them.
			#
			if {$s eq {}} {
				lset s_checked $n $s
				continue
			}

			# Don't send typical s-b-o lines as the emails are
			# almost always misspelled according to Aspell.
			#
			if {[regexp -nocase {^[a-z-]+-by:.*<.*@.*>$} $s]} {
				$w_text tag remove misspelled "$n.0" "$n.end"
				lset s_checked $n $s
				continue
			}

			puts $s_fd ^$s
			lappend s_pending [list $n $s]
			set active 1
		} else {
			# Delay until another idle loop to make sure we don't
			# spellcheck lines the user is actively changing.
			#
			lset s_seen $n $s
		}
	}

	if {$active} {
		set s_clear 1
		flush $s_fd
	} else {
		_restart_timer $this
	}
}

method _read {} {
	while {[gets $s_fd line] >= 0} {
		set lineno [lindex $s_pending 0 0]
		set line [string trim $line]

		if {$s_clear} {
			$w_text tag remove misspelled "$lineno.0" "$lineno.end"
			set s_clear 0
		}

		if {$line eq {}} {
			lset s_checked $lineno [lindex $s_pending 0 1]
			set s_pending [lrange $s_pending 1 end]
			set s_clear 1
			continue
		}

		set sugg [list]
		switch -- [string range $line 0 1] {
		{& } {
			set line [split [string range $line 2 end] :]
			set info [split [lindex $line 0] { }]
			set orig [lindex $info 0]
			set offs [lindex $info 2]
			foreach s [split [lindex $line 1] ,] {
				lappend sugg [string range $s 1 end]
			}
		}
		{# } {
			set info [split [string range $line 2 end] { }]
			set orig [lindex $info 0]
			set offs [lindex $info 1]
		}
		default {
			puts stderr "<spell> $line"
			continue
		}
		}

		incr offs -1
		set b_loc "$lineno.$offs"
		set e_loc [$w_text index "$lineno.$offs wordend"]
		set curr [$w_text get $b_loc $e_loc]

		# At least for English curr = "bob", orig = "bob's"
		# so Tk didn't include the 's but Aspell did.  We
		# try to round out the word.
		#
		while {$curr ne $orig
		 && [string equal -length [string length $curr] $curr $orig]} {
			set n_loc  [$w_text index "$e_loc +1c"]
			set n_curr [$w_text get $b_loc $n_loc]
			if {$n_curr eq $curr} {
				break
			}
			set curr  $n_curr
			set e_loc $n_loc
		}

		if {$curr eq $orig} {
			$w_text tag add misspelled $b_loc $e_loc
			if {[llength $sugg] > 0} {
				set s_suggest($orig) $sugg
			} else {
				unset -nocomplain s_suggest($orig)
			}
		} else {
			unset -nocomplain s_suggest($orig)
		}
	}

	fconfigure $s_fd -block 1
	if {[eof $s_fd]} {
		if {![catch {close $s_fd} err]} {
			set err [mc "Unexpected EOF from spell checker"]
		}
		catch {after cancel $s_i}
		$w_text tag remove misspelled 1.0 end
		error_popup [strcat [mc "Spell Checker Failed"] "\n\n" $err]
		return
	}
	fconfigure $s_fd -block 0

	if {[llength $s_pending] == 0} {
		_restart_timer $this
	}
}

proc available_langs {} {
	set langs [list]
	catch {
		set fd [open [list | aspell dump dicts] r]
		while {[gets $fd line] >= 0} {
			if {$line eq {}} continue
			lappend langs $line
		}
		close $fd
	}
	return $langs
}

}