diff options
Diffstat (limited to 'git-gui/lib/spellcheck.tcl')
| -rw-r--r-- | git-gui/lib/spellcheck.tcl | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/git-gui/lib/spellcheck.tcl b/git-gui/lib/spellcheck.tcl new file mode 100644 index 0000000000..538d61c792 --- /dev/null +++ b/git-gui/lib/spellcheck.tcl @@ -0,0 +1,415 @@ +# 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 +} + +} |