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#!/usr/locanl/bin/tclsh
# FILE: "/diska/home/joze/src/tclreadline/tclreadlineCompleter.tcl"
# LAST MODIFICATION: "Wed Sep  8 17:30:20 1999 (joze)"
# FILE: "/home/joze/src/tclreadline/tclreadlineCompleter.tcl"
# LAST MODIFICATION: "Fri Sep 10 03:06:31 1999 (joze)"
# (C) 1998, 1999 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
#
# tclreadline -- gnu readline for tcl
# Copyright (C) 1999  Johannes Zellner
#
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# johannes@zellner.org
# http://www.zellner.org/tclreadline/
#
# ================================================================== 

# done:
#
# - after
# - append
# - array
# - bgerror
# - binary
# - break
# - catch
# - cd
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# - variable
# - vwait
# - while # TODO
# 


namespace eval tclreadline {

# TryFromList will return an empty string, if
# the text typed so far does not match any of the
# elements in list. This might be used to allow
# subsequent filename completion by the builtin
# completer.
#
proc TryFromList {text lst} {

    # puts stderr "(CompleteFromList) \ntext=|$text|"
    # puts stderr "(CompleteFromList) lst=|$lst|"
    set pre [GetQuotedPrefix ${text}]
    set matches [MatchesFromList $text $lst]

    # puts stderr "(CompleteFromList) matches=|$matches|"
    if {1 == [llength $matches]} { ; # unique match
        # puts stderr \nunique=$matches\n
        # puts stderr "\n|${pre}${matches}[Right ${pre}]|\n"
        return [string trim ${pre}${matches}[Right ${pre}]]
    } elseif {"" != ${matches}} {
        # puts stderr \nmore=$matches\n
        set longest [CompleteLongest ${matches}]
        # puts stderr longest=|$longest|
        if {"" == $longest} {
            return [string trim "[list $text] ${matches}"]
        } else {
            return [string trim "${pre}${longest} ${matches}"]
        }
    } else {
        return ""; # nothing to complete
    }
}

# CompleteFromList will never return an empty string.
# completes, if a completion can be done, or ring
# the bell if not.
#
proc CompleteFromList {text lst} {
    set result [TryFromList ${text} ${lst}]
    if {![llength ${result}]} {
        Alert
        # return [string trim [list ${text}] ${lst}"]
        return [string trim "${text} ${lst}"]
    } else {
        return ${result}
    }
}

proc MenuFromList {text lst} {
    return [CompleteFromList $text $lst]
}
# ???????
# 
# proc MenuFromList {text lst} {
#     if {![llength ${text}]} {
#         return [string trim "{} ${lst}"]
#     } else {
#         return [TryFromList ${text} ${lst}]
#     }
# }
# 


#**
# never return an empty string, never complete.
# This is useful for showing options lists for example.
#
proc DisplayHints {lst} {
    return [string trim "{} ${lst}"]
}

#**
# find (partial) matches for `text' in `lst'.
# Ring the bell and return the whole list, if
# the user tries to complete ?..? options or
# <..> hints.
#
proc MatchesFromList {text lst} {
    set result ""
    set text [StripPrefix $text]
    set null [string index $text 0]
    if {"<" == $null || "?" == $null} {
        Alert
        return $lst
    }
    # puts stderr "(MatchesFromList) text=$text"
    # puts stderr "(MatchesFromList) lst=$lst"
    foreach word $lst {
        if {[string match ${text}* ${word}]} {
            lappend result ${word}
        }
    }
    return [string trim $result]
}

proc FirstNonOption {line} {
    set expr_pos 1
    foreach word [lrange ${line} 1 end] {; # 0 is the command itself
        if {"-" != [string index ${word} 0]} {
            break
        } else {
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}

proc Alert {} {
    puts -nonewline \a
    flush stdout
}

# AttemptFromList will return an empty string, if
# the text typed so far does not match any of the
# elements in list. This might be used to allow
# subsequent filename completion by the builtin
# completer.
#

proc AttemptFromList {text lst} {
    return [string trim [Format [FindInList $text $lst] $text]]
}

# CompleteFromList will never return an empty string.
#
proc CompleteFromList {text lst} {
    set result [AttemptFromList ${text} ${lst}]
    if {![llength ${result}]} {
        Alert
        return [string trim "${text} ${lst}"]
    } else {
        return ${result}
    }
}

# ???????
proc MenuFromList {text lst} {
    if {![llength ${text}]} {
        return [string trim "{} ${lst}"]
    } else {
        return [AttemptFromList ${text} ${lst}]
    }
}

# never return an empty string
#
proc Menu {lst} {
    return [string trim "{} ${lst}"]
}

proc FindInList {text lst} {
    set result ""
    foreach word $lst {
        if {[string match ${text}* ${word}]} {
            lappend result ${word}
        }
    }
    return [string trim $result]
}


# get the longest common completion
# e.g. str == {tcl_version tclreadline_version tclreadline_library}
# --> [GetCommon ${str}] == "tcl"
# --> [CompleteLongest ${str}] == "tcl"
#
proc GetCommon {str} {
proc CompleteLongest {str} {
    # puts stderr str=$str
    set match0 [lindex ${str} 0]
    set len0 [string length $match0]
    set no_matches [llength ${str}]
    set part ""
    for {set i 0} {$i < $len0} {incr i} {
        set char [string index $match0 $i]
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            append part $char
        }
    }
    # puts stderr part=$part
    return ${part}
}

proc SubCmd {start line} {
proc SplitLine {start line} {
    set depth 0
    # puts stderr SubCmd
    # puts stderr SplitLine
    for {set i $start} {$i >= 0} {incr i -1} {
        set c [string index $line $i]
        if {{;} == $c} {
            incr i; # discard command break character
            return [list [expr $start - $i] [string range $line $i end]]
        } elseif {{]} == $c} {
            incr depth
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proc OutChannelId {text} {
    # return [ChannelId ${text} outChannel {stdout stderr}]
    return [ChannelId ${text} outChannel]
}

proc ChannelId {text {descript channelId} {chs ""}} {
    if {"" == ${chs}} {
        # the `file channels' command is present
        # only in pretty new versions.
        #
        if [catch {set chs [file channels]}] {
            set chs {stdin stdout stderr}
        }
    }
    if {[llength [set channel [MenuFromList ${text} ${chs}]]]} {
    if {[llength [set channel [MatchesFromList ${text} ${chs}]]]} {
        return ${channel}
    } else {
        return [Menu ${descript}]
        return [DisplayHints ${descript}]
    }
}

proc QuoteQuotes {line} {
    regsub -all -- \" $line {\"} line
    regsub -all -- \{ $line {\{} line; # \}\} (keep the editor happy)
    return $line
}

proc Trace {varT} {
    if {![info exists ::tclreadline::Debug]} {return}
    upvar $varT var
    if {![info exists var]} {
        puts $varT=<notdefined>
    } else {
        puts $varT=|$var|
    }
    # puts $var
}

#**
# get the word position.
# @return the word position
# @note will returned modified values.
# @sa EventuallyEvaluateFirst
# @date Sep-06-1999
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# line  == "put $b"
# [PartPosition] should return 0
#
proc PartPosition {partT startT endT lineT} {

    upvar $partT part $startT start $endT end $lineT line
    EventuallyEvaluateFirst part start end line
    return [Llength [string range $line 0 [expr $start - 1]]]

# 
    # puts stderr "(PartPosition) line\[start\]=[string index $line $start]"
#     set local_start [expr $start - 1]
    # puts stderr "(PartPosition) part=|$part|"
    incr start -1
    if {"\"" == [string index $line $start]} {
        incr start -1
#     set local_start_chr [string index $line $local_start]
#     if {"\"" == $local_start_chr || "\{" == $local_start_chr} {
#         incr local_start -1
    }
    # puts stderr "(PartPosition) line=|$line|" 
#     }
    # puts stderr "(PartPosition) start=$start"
    set line [string range $line 0 $start]
# 
#     set pre_text [QuoteQuotes [string range $line 0 $local_start]]
    set line [QuoteQuotes $line]
    # puts stderr "(PartPosition) line=|$line|" 
    set result [llength $line]
#     return [llength $pre_text]
    # puts stderr $result
    return $result
# 
}

proc Right {left} {
    # puts left=$left
    if {"\"" == $left} {
        return {\"}
    } elseif {"\\\"" == $left} {
        return ""
        return "\\\""
    } elseif {"\{" == $left} {
        return "\}"
    } elseif {"\\\{" == $left} {
        return "\\\}"
    }
    return ""
}

proc GetQuotedPrefix {text} {
    set null [string index $text 0]
    if {"\"" == $null || "\{" == $null} {
        return \\$null
    } else {
        return {}
    }
}

proc CountChar {line char} {
    # puts stderr char=|$char|
    set found 0
    set pos 0
    while {-1 != [set pos [string first $char $line $pos]]} {
        incr pos
        incr found
    }
    return $found
}

#**
# save `lindex'. works also for non-complete lines
# with opening parentheses or quotes.
# usage as `lindex'.
#
proc Lindex {line pos} {
    if {[catch [list set sub [lindex $line $pos]]]} {
        set diff [expr [CountChar $line \{] - [CountChar $line \}]]
        # puts stderr diff=$diff
        for {set i 0} {$i < $diff} {incr i} { ; # \{ keep the editor happy
            append line \}
        }
        # puts stderr line=$line
        if {!$diff || [catch [list set sub [lindex $line $pos]]]} {
            if {[expr [CountChar $line \"] % 2]} { append line \" }
        }
        if {[catch [list set sub [lindex $line $pos]]]} { return {} }
    }
    return $sub
}

#**
# save `llength' (see above).
#
proc Llength {line} {
    set diff 0
    if {[catch [list set len [llength $line]]]} {
        set diff [expr [CountChar $line \{] - [CountChar $line \}]]
        # puts stderr diff=$diff
        for {set i 0} {$i < $diff} {incr i} { ; # \{ keep the editor happy
            append line \}
        }
        if {$diff < 0} {
            set diff 0
        }
        # puts stderr line=$line
        if {!$diff || [catch [list set len [llength $line]]]} {
            incr diff
            if {[expr [CountChar $line \"] % 2]} { append line \" }
        }
        if {[catch [list set len [llength $line]]]} { return {} }
    }
    return [expr $len - $diff]
}

proc GetPrefix {text} {
proc StripPrefix {text} {
    # puts "(StripPrefix) text=|$text|"
    set null [string index $text 0]
    # puts null=|$null|
    if {"\"" == $null} {
    if {"\"" == $null || "\{" == $null} {
        # puts stderr \neins\n
        set pre "\\\""
    } elseif {"\{" == $null} {
        # puts stderr \nzwei\n
        set pre "\\\{"
    } else {
        # puts stderr \ndrei\n
        set pre ""
    }
    return ${pre}
        return [string range $text 1 end]
}

proc Format {matches {part {}}} {
    # puts matches=|$matches|
    # puts stderr \npart=|$part|\n
    set pre [GetPrefix ${part}]
    if {1 == [llength $matches]} { ; # unique match
        # puts stderr \nunique=$matches\n
        # puts stderr "\n|${pre}${matches}[Right ${pre}]|\n"
        return [string trim ${pre}${matches}[Right ${pre}]]
    } elseif {"" != ${matches}} {
        # puts stderr \nmore=$matches\n
        set common [GetCommon ${matches}]
        # puts stderr common=|$common|
        if {"" == $common} {
            return [string trim "[list $part] ${matches}"]
        } else {
    } else {
            return [string trim "${pre}${common} ${matches}"]
        }
    } else {
        return ""; # nothing to complete
        return $text
    }
}

proc ListCompletion {text {level -1}} {
    # TODO
    return ""
    # return [VarCompletion ${text} ${level}]
}

proc VarCompletion {text {level -1}} {
    if {-1 == ${level}} {
        set level [info level]
    } else {
        incr level
    }
    set pre [GetPrefix ${text}]

    if {"" == ${pre}} {
        set var ${text}
    set pre [GetQuotedPrefix ${text}]
    set var [StripPrefix ${text}]
    # puts stderr "(VarCompletion) pre=|$pre|"
    # puts stderr "(VarCompletion) var=|$var|"
    } else {
        set var [string range ${text} 1 end]
    }

    # arrays
    #
    if {[regexp {([^(]*)\((.*)} ${var} all array name]} {
        set names [uplevel ${level} array names ${array} ${name}*]
        if {1 == [llength $names]} { ; # unique match
            return "${array}(${names})"
        } elseif {"" != ${names}} {
            return "${array}([GetCommon ${names}] ${names}"
            return "${array}([CompleteLongest ${names}] ${names}"
        } else {
            return ""; # nothing to complete
        }
    }

    # non-arrays
    #
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        #
        if {[uplevel ${level} array exists $matches]} {
            return [VarCompletion ${matches}( ${level}]; # recursion
        } else {
            return ${pre}${matches}[Right ${pre}]
        }
    } elseif {"" != $matches} { ; # more than one match
        #puts stderr "(VarComletion) matches=|$matches|"
        #puts stderr "(VarComletion) text=|$text|"
# 
        set common [GetCommon ${matches}]
        if {"" == ${common}} {
            return [Format ${matches} ${text}]
        } else {
            return [string trim "${pre}${common} ${matches}"]
#         set common [CompleteLongest ${matches}]
#         if {"" == ${common}} {
#             return [Format ${matches} ${text}]
#         } else {
#             return [string trim "${pre}${common} ${matches}"]
        }
#         }
# 
          return [CompleteFromList ${text} ${matches}]
    } else {
        return ""; # nothing to complete
    }
}

proc FullQualifiedMatches {qualifier matchlist} {
    set new ""
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}

proc CommandsOnlyCompletion {cmd} {
    return [CommandCompletion ${cmd} commands]
}

proc CommandCompletion {cmd {action both} {spc ::}} {
    # puts stderr "(CommandCompletion) cmd=|$cmd|"
    # puts stderr "(CommandCompletion) action=|$action|"
    # puts stderr "(CommandCompletion) spc=|$spc|"
    set quali [namespace qualifiers ${cmd}]
    if {[llength ${quali}]} {
        set rec [CommandCompletion [namespace tail ${cmd}] ${action} ${quali}]
        return [FullQualifiedMatches ${quali} ${rec}]
    }
    # puts stderr \ncmd=|$cmd|\n
    set cmd [string trim ${cmd}]*
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# 
#             set matches ${new}
#             unset new
# 
            set matches [FullQualifiedMatches ${namespaces} ${matches}]
            set namespaces ""
        }
        return [string trim "${matches} ${namespaces}"]
    }
    return [string trim "${matches} ${namespaces}"]
    } else {
        return [string trim "${matches} ${namespaces}"]
    }
}

#**
# check, if the first argument starts with a '['
# and must be evaluated before continuing.
# NOTE: eventually modifies all arguments.
# DATE: Sep-06-1999
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    # SCENARIO:
    #
    # % puts bla; put<TAB> $b
    # part  == put
    # start == 10
    # end   == 13
    # line  == "puts bla; put $b"
    # [SubCmd] --> {1 " put $b"} == sub
    # [SplitLine] --> {1 " put $b"} == sub
    # new_start = [lindex $sub 0] == 1
    # new_end   = [expr $end - ($start - $new_start)] == 4
    # new_part  == $part == put
    # new_line  = [lindex $sub 1] == " put $b"
    # 
    } elseif {"" != [set sub [SubCmd $start $line]]} {
    } elseif {"" != [set sub [SplitLine $start $line]]} {
        set new_start [lindex $sub 0]
        set new_end [expr $end - ($start - $new_start)]
        set new_line [lindex $sub 1]
        # puts stderr "(SubCmd) $new_start $new_end $new_line"
        # puts stderr "(SplitLine) $new_start $new_end $new_line"
        return [ScriptCompleter $part $new_start $new_end $new_line]
    } elseif {0 == [set pos [PartPosition part start end line]]} {
        # puts stderr "(PartPosition) $part $start $end $line"
        # set matches [array names known_cmds "[string trim ${part}]*"]
        set all [CommandCompletion ${part}]
        # puts stderr "(ScriptCompleter) all=$all"
        #puts \nmatches=$matches\n
        return [Format $all $part]
        # return [Format $all $part]
        return [TryFromList $part $all]
    } else {
        # try to use $pos further ...
        # puts stderr |$line|
        if {"." == [string index [lindex ${line} 0] 0]} {
        if {"." == [string index [string trim ${line}] 0]} {
            set alias WIDGET
        } else {
            set alias [lindex [QuoteQuotes ${line}] 0]
        }
        foreach cmd [list ${alias} tclreadline_complete_unknown] {
            if {"" != [namespace eval ::tclreadline \
                [list info procs complete(${cmd})]]
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                } {
                    error [list complete(${cmd}) takes ${arguments} \
                    arguments, but should take exactly 6.]
                }

                # remove leading quotes
                #
                if {"\"" == [string index $part 0] \
                    || "\{" == [string index $part 0]
                } {
                    set mod [string range $part 1 end]
                } else {
                    set mod $part
                set mod [StripPrefix $part]
                }
                # puts stderr mod=$mod

                if {[catch [list set script_result \
                    [complete(${cmd}) $part \
                    $start $end $line $pos $mod]] ::tclreadline::errorMsg]
                } {
                    error "error during evaluation of `complete(${cmd})'"
                }
                # puts stderr \nscript_result=|${script_result}|
                return ${script_result}
            }
        }
        # no specific command completer found.
        if {"" != [array names known_cmds $cmd]} {
            set current [lindex $known_cmds($cmd) $pos]
            if {"" != $current && "" == [string trim $part]} {
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# explicit command completers
#

# -------------------------------------
#                 TCL
# -------------------------------------

proc complete(after) {text start end line pos mod} {
    set sub [Lindex $line 1]
    # puts \npos=$pos
    switch -- $pos {
        1 {
            return [CompleteFromList ${text} {<ms> cancel idle info}]
        }
        2 {
            switch -- $sub {
                cancel {
                    set after_info [after info]
                    if {![llength $after_info]} {
                        return [DisplayHints <script>]
                    } else {
                        return [CompleteFromList $mod "<script> [after info]"]
                    }
                }
                idle {
                    return [DisplayHints <script>]
                }
                info {
                    return [CompleteFromList $mod [after info]]
                }
                default { return [DisplayHints ?script?] }
            }
        }
        default {
            switch -- $sub {
                info { return [DisplayHints {}] }
                default { return [DisplayHints ?script?] }
            }
        }
    }
    return ""
}

proc complete(append) {text start end line pos mod} {
    switch -- $pos {
        1 { return [VarCompletion ${text}] }
        default { return [Menu ?value?] }
        1       { return [VarCompletion ${text}] }
        default { return [DisplayHints ?value?] }
    }
    return ""
}

proc complete(array) {text start end line pos mod} {
    switch -- $pos {
        1 {
            set cmds {
                anymore donesearch exists get names
                nextelement set size startsearch
            }
            return [CompleteFromList $text $cmds]
        }
        2 {
            set matches ""
            set vars [uplevel [info level] info vars ${mod}*]
            foreach var ${vars} {
                if {[uplevel [info level] array exists ${var}]} {
                    lappend matches ${var}
                }
            }
            return [CompleteFromList ${text} ${matches}]
        }
        default {
            set cmd [Lindex $line 1]
            set array_name [Lindex $line 2]
            switch -- $cmd {
                get -
                names {
                    set pattern [Lindex $line 3]
                    set matches [uplevel [info level] \
                    array names ${array_name} ${pattern}*]
                    if {![llength $matches]} {
                        return [Menu ?pattern?]
                    } else {
                        return [CompleteFromList ${text} ${matches}]
                    }
                }
                anymore -
                donesearch -
                nextid { return [Menu <searchId>] }
            }
        }
    }
    return ""
}

# proc complete(bgerror) {text start end line pos mod} {
# }

proc complete(binary) {text start end line pos mod} {
    set cmd [Lindex $line 1]
    switch -- $pos {
        1 {
            return [CompleteFromList $text {format scan}]
        }
        2 {
            switch -- $cmd {
                format { return [DisplayHints <formatString>] }
                scan   { return [DisplayHints <string>] }
            }
        }
        3 {
            switch -- $cmd {
                format { return [DisplayHints ?arg?] }
                scan   { return [DisplayHints <formatString>] }
            }
        }
        default {
            switch -- $cmd {
                format { return [DisplayHints ?arg?] }
                scan   { return [DisplayHints ?varName?] }
            }
        }
    }
    return ""
}

# proc complete(break) {text start end line pos mod} {
# }

proc complete(catch) {text start end line pos mod} {
    switch -- $pos {
        1 { return [DisplayHints <script>] }
        2 { return [DisplayHints ?varName?] }
    }
    return ""
}

# proc complete(cd) {text start end line pos mod} {
# }

proc complete(if) {text start end line pos mod} {
    # TODO: this is not good yet.
    if {2 == $pos} {
        return [AttemptFromList $text {then}]
    } elseif {$pos > 2} {
        set prev [PreviousWord ${start} ${line}]
        switch $prev {
            then -
            else -
            elseif { return "" }
        }
    switch -- $pos {
        1 { return [CompleteFromList $mod {\{}] }
        2 { return [TryFromList $mod {then}] }
        default {
            set prev [PreviousWord ${start} ${line}]
            switch $prev {
                then -
                else -
                elseif { return [CompleteFromList $mod {\{}] }
                default { return [TryFromList $text {then else elseif}] }
            }
        return [AttemptFromList $text {then else elseif}]
    }
        }
    }
    return ""
}

proc complete(incr) {text start end line pos mod} {
    if {1 == $pos} {
        set matches [uplevel 2 info vars "${mod}*"]
        set final ""
        # check for integers
        #
        foreach match $matches {
            if {[uplevel 2 array exists $match]} {
                continue
            }
            if {[regexp {^[0-9]+$} [uplevel 2 set $match]]} {
                lappend final $match
            }
        }
        return [Format ${final} $text]
    }
}

proc complete(array) {text start end line pos mod} {
    if {1 == $pos} {
        set cmds {
            anymore donesearch exists get names
            nextelement set size startsearch
        }
        return [AttemptFromList $text $cmds]
    } elseif {2 == $pos} {
        set cmd [lindex $line 1]
        switch -- $cmd {
            anymore -
            donesearch -
            exists -
            get -
            names -
            nextelement -
            set -
            size -
            startsearch {
                set matches ""
                set vars [uplevel [info level] info vars ${mod}*]
                foreach var ${vars} {
                    if {[uplevel [info level] array exists ${var}]} {
                        lappend matches ${var}
                    }
                }
                return [Format ${matches} ${text}]
            }
        }
    } elseif {3 == $pos} {
        set cmd [lindex $line 1]
        switch -- $cmd {
            get -
            names {
                if {[catch {
                    set names [uplevel [info level] \
                    array names [lindex $line 2] [lindex $line 3]*]}]} {
                    return ""
                } else {
                    set common [GetCommon ${names}]
                    if {"" == ${common}} {
                        return [Format ${names} ${text}]
                    } else {
                        return [string trim "${common} ${names}"]
                    }
                }
            }
        }
    }
    return ""
}

proc complete(binary) {text start end line pos mod} {
    set cmd [lindex $line 1]
    switch -- $pos {
        1 {
            return [AttemptFromList $text {format scan}]
        }
        2 {
            switch -- $cmd {
                format { return [Menu formatString] }
                scan   { return [Menu string] }
            }
        }
        3 {
            switch -- $cmd {
                format { return [Menu ?arg?] }
                scan   { return [Menu formatString] }
            }
        }
        default {
            switch -- $cmd {
                format { return [Menu ?arg?] }
                scan   { return [Menu ?varName?] }
            }
        }
    }
    return ""
}

proc complete(clock) {text start end line pos mod} {
    set cmd [lindex $line 1]
    switch -- $pos {
        1 {
            return [AttemptFromList $text {clicks format scan seconds}]
            return [TryFromList $text {clicks format scan seconds}]
        }
        2 {
            switch -- $cmd {
                format  { return [Menu clockValue] }
                scan    { return [Menu dateString] }
                format  { return [DisplayHints clockValue] }
                scan    { return [DisplayHints dateString] }
                clicks  -
                seconds {}
            }
        }
        3 {
            switch -- $cmd {
                format {
                    set sub [lindex $line 3]
                    set subcmds {-fmt -gmt}
                    return [AttemptFromList $text $subcmds]
                    return [TryFromList $text $subcmds]
                }
                scan {
                    set sub [lindex $line 3]
                    set subcmds {-base -gmt}
                    return [AttemptFromList $text $subcmds]
                    return [TryFromList $text $subcmds]
                }
                clicks  -
                seconds {}
            }
        }
    }
    return ""
}

proc complete(encoding) {text start end line pos mod} {
    set cmd [lindex $line 1]
    switch -- $pos {
        1 {
            return [AttemptFromList $text {convertfrom convertto names system}]
            return [TryFromList $text {convertfrom convertto names system}]
        }
        2 {
            switch -- $cmd {
                names {}
                convertfrom -
                convertto -
                system {
                    return [AttemptFromList ${text} [encoding names]]
                    return [TryFromList ${text} [encoding names]]
                }
            }
        }
    }
    return ""
}

proc complete(expr) {text start end line pos mod} {
    set cmds {
        acos    cos     hypot   sinh 
        asin    cosh    log     sqrt 
        atan    exp     log10   tan 
        atan2   floor   pow     tanh 
        ceil    fmod    sin     abs 
        double  int     rand    round 
        srand 
    }
    return [AttemptFromList $text $cmds]
    return [TryFromList $text $cmds]
}

proc complete(fconfigure) {text start end line pos mod} {
    set cmd [lindex $line 1]
    switch -- $pos {
        1 {
            return [ChannelId ${mod}]
        }
        default {
            set option [PreviousWord ${start} ${line}]
            switch -- $option {
                -blocking {
                    return [AttemptFromList ${text} {yes no}]
                    return [TryFromList ${text} {yes no}]
                }
                -buffering {
                    return [AttemptFromList ${text} {full line none}]
                    return [TryFromList ${text} {full line none}]
                }
                -buffersize {
                    if {![llength ${text}]} {
                        return [Menu newSize]
                        return [DisplayHints newSize]
                    }
                }
                -encoding {
                    return [AttemptFromList ${text} [encoding names]]
                    return [TryFromList ${text} [encoding names]]
                }
                -eofchar {
                    return [Menu {\{inChar\ outChar\}}]
                    return [DisplayHints {\{inChar\ outChar\}}]
                }
                -translation {
                    return [AttemptFromList ${text} {auto binary cr crlf lf}]
                    return [TryFromList ${text} {auto binary cr crlf lf}]
                }
                default {return [AttemptFromList $text {
                default {return [TryFromList $text {
                    -blocking -buffering -buffersize
                    -encoding -eofchar -translation}]
                }
            }
        }
    }
    return ""
}

proc complete(fcopy) {text start end line pos mod} {
    switch -- $pos {
        1 {
            return [InChannelId ${mod}]
        }
        2 {
            return [OutChannelId ${mod}]
        }
        default {
            set option [PreviousWord ${start} ${line}]
            switch -- $option {
                -size    { return [Menu size] }
                -command { return [Menu callback] }
                default  { return [AttemptFromList $text {-size -command}] }
                -size    { return [DisplayHints size] }
                -command { return [DisplayHints callback] }
                default  { return [TryFromList $text {-size -command}] }
            }
        }
    }
    return ""
}

proc complete(file) {text start end line pos mod} {
    switch -- $pos {
        1 {
            set cmds {
                atime attributes copy delete dirname executable exists
                extension isdirectory isfile join lstat mtime mkdir
                nativename owned pathtype readable readlink rename
                rootname size split stat tail type volumes writable
            }
            return [AttemptFromList $text $cmds]
            return [TryFromList $text $cmds]
        }
        2 {
            set cmd [lindex $line 1]
            switch -- $cmd {
                atime -
                attributes -
                dirname -
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-
+








proc complete(fileevent) {text start end line pos mod} {
    switch -- $pos {
        1 {
            return [ChannelId ${mod}]
        }
        2 {
            return [CompleteFromList ${mod} {readable writable}]
            return [MenuFromList ${mod} {readable writable}]
        }
    }
    return ""
}

proc complete(flush) {text start end line pos mod} {
    switch -- $pos {
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-
+







    }
    return ""
}

proc complete(glob) {text start end line pos mod} {
    switch -- $pos {
        1 {
            set matches [AttemptFromList ${mod} {-nocomplain --}]
            set matches [TryFromList ${mod} {-nocomplain --}]
            if {[llength [string trim ${mod}]] && [llength ${matches}]} {
                return ${matches}
            }
        }
    }
    return ""
}
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-
+








proc complete(info) {text start end line pos mod} {
    if {1 == $pos} {
        set cmds {
            args body cmdcount commands complete default exists
            globals hostname level library loaded locals nameofexecutable
            patchlevel procs script sharedlibextension tclversion vars}
        return [AttemptFromList $text $cmds]
        return [TryFromList $text $cmds]
    } elseif {2 == $pos} {
        set cmd [lindex $line 1]
        switch -- $cmd {
            args -
            body -
            default -
            procs { return [complete(proc) ${text} 0 0 ${line} 1 ${mod}] }
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-
+



-
+








proc complete(interp) {text start end line pos mod} {
    set cmd [lindex $line 1]
    if {1 == $pos} {
        set cmds {
            alias aliases create delete eval exists expose hide hidden
            issafe invokehidden marktrusted slaves share target transfer}
        return [AttemptFromList $text $cmds]
        return [TryFromList $text $cmds]
    } elseif {2 == $pos} {
        switch -- $cmd {
            create {
                return [AttemptFromList $text {-safe -- ?path?}]
                return [TryFromList $text {-safe -- ?path?}]
            }

            eval -
            exists -
            expose -
            hide -
            hidden -
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-
+










-
+




















-
+







        }
    } elseif {3 == $pos} {
        switch -- $cmd {

            alias {if {![llength ${mod}]} { return <srcCmd> }}

            create {
                return [AttemptFromList $text {-safe -- ?path?}]
                return [TryFromList $text {-safe -- ?path?}]
            }

            eval {if {![llength ${mod}]} { return <arg> }}
            delete {if {![llength ${mod}]} { return ?path? }}

            expose {if {![llength ${mod}]} { return <hiddenName> }}
            hide {if {![llength ${mod}]} { return <exposedCmdName> }}

            invokehidden {
                return \
                [AttemptFromList $text {?-global? <hiddenCmdName}]
                [TryFromList $text {?-global? <hiddenCmdName}]
            }

            target {if {![llength ${mod}]} { return <alias> }}

            exists {}
            hidden {}
            marktrusted {}
            aliases {}
            issafe {}
            slaves {}

            share -
            tranfer {return [ChannelId ${mod}]}
        }
    } elseif {4 == $pos} {
        switch -- $cmd {

            alias {if {![llength ${mod}]} { return <targetPath> }}

            create {
                return [AttemptFromList $text {-safe -- path}]
                return [TryFromList $text {-safe -- path}]
            }

            expose {if {![llength ${mod}]} { return ?exposedCmdName? }}
            hide {if {![llength ${mod}]} { return ?hiddenCmdName? }}

            share -
            tranfer {if {![llength ${mod}]} { return ?destPath? }}
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-
+










-
+







            }
        }
    }
    return ""
}

proc complete(lsort) {text start end line pos mod} {
    set options [Menu ${mod} {
    set options [DisplayHints ${mod} {
        -ascii -dictionary -integer -real -command
        -increasing -decreasing -index
    }]
    set matches [ListCompletion ${text}]
    return [string trim "${matches} ${options}"]
}

proc complete(history) {text start end line pos mod} {
    if {1 == $pos} {
        set cmds {add change clear event info keep nextid redo}
        return [AttemptFromList $text $cmds]
        return [TryFromList $text $cmds]
    } elseif {2 == ${pos}} {
        set cmd [lindex $line 1]
        switch -- $cmd {
            add { if {![llength ${mod}]} { return <newValue> } }
            change { if {![llength ${mod}]} { return <newValue> } }

            info -
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-
+







-
+


-
+

-
+













-
+







-
+







    set space_matches [namespace children :: [string trim ${mod}*]]
    # puts \nspace_matches=|${space_matches}|
    set cmd [lindex $line 1]
    if {1 == $pos} {
        set cmds {
            children code current delete eval export forget
            import inscope origin parent qualifiers tail which}
        return [AttemptFromList $text $cmds]
        return [TryFromList $text $cmds]
    } elseif {2 == $pos} {
        switch -- $cmd {
            children -
            delete -
            eval -
            inscope -
            forget -
            parent { return [AttemptFromList ${mod} $space_matches] }
            parent { return [TryFromList ${mod} $space_matches] }
            code { return "" }
            current {}
            export { return [MenuFromList ${mod} -clear ?pattern?] }
            export { return [MenuFromList ${mod} {-clear ?pattern?}] }
            import {
                return [MenuFromList ${mod} "-force $space_matches"]
                return [MenuFromList ${mod} {-force $space_matches}]
            }
            origin { if {![llength ${mod}]} { return <command> } }
            qualifiers -
            tail { if {![llength ${mod}]} { return <string> } }
            which { return [MenuFromList ${mod} {
                -command -variable <name>}] }
        }
     #      forget { if {![llength ${mod}]} { return ?pattern? } }
    } elseif {3 == $pos && "inscope" == $cmd} {
            if {![llength ${mod}]} { return arg }
    } else {
        switch -- $cmd {
            children { if {![llength ${mod}]} { return ?pattern? } }
            delete { return [AttemptFromList $text $space_matches] }
            delete { return [TryFromList $text $space_matches] }
            eval { if {![llength ${mod}]} { return ?arg? } }
            inscope { if {![llength ${mod}]} { return ?arg? } }
            parent {}
            code {}
            current {}
            export -
            forget -
            import { return [Menu ?pattern?] }
            import { return [DisplayHints ?pattern?] }
            origin {}
            qualifiers {}
            tail {}
            which { return [MenuFromList $text {
                -command -variable <name>}] }
        }
    }
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-
+








proc complete(package) {text start end line pos mod} {
    set cmd [lindex $line 1]
    if {1 == $pos} {
        set cmds {
            forget ifneeded names present provide require
            unknown vcompare versions vsatisfies}
        return [AttemptFromList $text $cmds]
        return [TryFromList $text $cmds]
    } elseif {2 == $pos} {
        switch -- $cmd {
            forget -
            ifneeded -
            provide -
            versions { return [MenuFromList ${mod} [package names]] }
            present -
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1645







-
+


















-
+









-
+









-
+






-
+







    return ""
}

proc complete(proc) {text start end line pos mod} {
    # puts known_procs=|${known_procs}|
    if {1 == $pos} {
        set known_procs [ProcsOnlyCompletion ${mod}]
        set common [GetCommon ${known_procs}]
        set common [CompleteLongest ${known_procs}]
        if {"" == ${common}} {
            return [Format ${known_procs} ${text}]
        } else {
            return [string trim "${common} ${known_procs}"]
        }
    } elseif {2 == $pos} {
        set proc [lindex $line 1]
        if {[catch {set args [uplevel 2 info args ${proc}]}]} {
            return ""
        } else {
            return [list "\{${args}\} \{"]
        }
    }
    return ""
}

proc complete(puts) {text start end line pos mod} {
    if {1 == $pos} {
        return [MenuFromList ${mod} "-nonewline [OutChannelId ${mod}]"]
        return [TryFromList ${mod} "-nonewline [OutChannelId ${mod}]"]
    } elseif {2 <= $pos} {
        if {![llength ${mod}]} {
            set opt [lindex ${line} 1]
            if {[llength [MenuFromList ${opt} {-nonewline}]]} {
                incr pos -1
            }
            if {1 == $pos} {
                return [OutChannelId ${mod}]
            } elseif {2 == $pos} {
                return [Menu <string>]
                return [DisplayHints <string>]
                return <string>
            }
        }
    }
    return ""
}

proc complete(read) {text start end line pos mod} {
    if {1 == $pos} {
        return [MenuFromList ${mod} "-nonewline [InChannelId ${mod}]"]
        return [MenuFromList ${mod} {-nonewline [InChannelId ${mod}]}]
    } elseif {2 == $pos} {
        if {![llength ${mod}]} {
            set opt [lindex ${line} 1]
            if {[llength [MenuFromList ${opt} {-nonewline}]]} {
                return [InChannelId ${mod}]
            } elseif {![llength ${mod}]} {
                return <numBytes>
                return [DisplayHints <numBytes>]
            }
        }
    }
    return ""
}

proc complete(regexp) {text start end line pos mod} {
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1535

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1720

1721
1722
1723
1724
1725
1726
1727
1728







-
+

















-
+















-
+







        }
    }
    return ""
}

proc complete(rename) {text start end line pos mod} {
    if {1 == $pos} {
        set all [CommandCompletion ${mod}]
        # TODO set all [CommandCompletion ${mod}]
        return [Format $all ${mod}]
    } elseif {2 == $pos && ![llength ${mod}]} {
        return <newName>
    }
    return ""
}

proc complete(return) {text start end line pos mod} {
    # TODO this is not perfect yet
    set cmds {-code -errorinfo -errorcode <string>}
    set res [MenuFromList [PreviousWord ${start} ${line}] ${cmds}]
    if {1 == [llength ${res}]} {
        switch -- ${res} {
            -errorinfo { if {![llength ${mod}]} { return <info> } }
            -code -
            -errorcode {
                set codes {ok error return break continue}
                return [AttemptFromList ${mod} ${codes}]
                return [TryFromList ${mod} ${codes}]
            }
        }
    }
    set cmds [RemoveUsedOptions ${line} ${cmds}]
    set res [string trim [MenuFromList ${mod} ${cmds}]]
    if {[llength ${res}]} {
        return ${res}
    }
    return ""
}

proc complete(seek) {text start end line pos mod} {
    if {1 == $pos} {
        return [ChannelId ${mod}]
    } elseif {2 == $pos} {
        return [AttemptFromList ${mod} {start current end}]
        return [TryFromList ${mod} {start current end}]
    }
    return ""
}

proc complete(set) {text start end line pos mod} {
    # puts stderr "\ntext=|$text| $start $end\n"
    # puts stderr \nline=|$line|\n
1595
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1602

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1752
1753

1754
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1761







-
+







    if {"-server" == ${cmd}} {
        # server sockets
        #
        if {2 == $pos && ![llength ${mod}]} { return <command> }
        switch -- ${prev} {
            -myaddr { if {![llength ${mod}]} { return <addr> } }
        }
        return [AttemptFromList ${mod} [concat {-error -sockname -peername}]]
        return [TryFromList ${mod} [concat {-error -sockname -peername}]]
    } else {
        # client sockets
        #
        switch -- ${prev} {
            -myaddr { if {![llength ${mod}]} { return <addr> } }
            -myport { if {![llength ${mod}]} { return <port> } }
        }
1624
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1631

1632
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1646

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1803
1804
1805







-
+














-
+







                close $id
            } 
        }
        set cmds {-myaddr -myport -async -myaddr -error -sockname -peername}
        if {$pos <= 1} {
            lappend cmds -server
        }
        return [AttemptFromList ${mod} [concat ${cmds} ${hosts}]]
        return [TryFromList ${mod} [concat ${cmds} ${hosts}]]
    }
    return ""
}

proc complete(source) {text start end line pos mod} {
    return ""; # force file name completion
}

proc complete(string) {text start end line pos mod} {
    set cmd [lindex ${line} 1]
    set cmds {
        compare first index last length match range tolower
        totitle toupper trim trimleft trimright wordend wordstart}
    if {1 == $pos} {
        return [AttemptFromList ${mod} ${cmds}]
        return [TryFromList ${mod} ${cmds}]
    } elseif {2 == $pos} {
        switch -- $cmd {
            compare -
            first -
            last { if {![llength ${mod}]} { return <string1> } }

            match { if {![llength ${mod}]} { return <pattern> } }
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1704

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1873

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1879
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1881







-
+






-
+













-
+



-
+







    }
    return ""
}

proc complete(subst) {text start end line pos mod} {
    set opts {-nobackslashes -nocommands -novariables}
    set opts [RemoveUsedOptions ${line} ${opts}]
    return [AttemptFromList ${mod} [concat ${opts} <string>]]
    return [TryFromList ${mod} [concat ${opts} <string>]]
    return ""
}

proc complete(switch) {text start end line pos mod} {
    set opts {-exact -glob -regexp --}
    set opts [RemoveUsedOptions ${line} ${opts} {--}]
    return [AttemptFromList ${mod} [concat ${opts} <string>]]
    return [TryFromList ${mod} [concat ${opts} <string>]]
    return ""
}

proc complete(tell) {text start end line pos mod} {
    if {1 == $pos} {
        return [ChannelId ${mod}]
    }
    return ""
}

proc complete(trace) {text start end line pos mod} {
    set cmd [lindex ${line} 1]
    if {1 == $pos} {
        return [AttemptFromList ${mod} {variable vdelete vinfo}]
        return [TryFromList ${mod} {variable vdelete vinfo}]
    } elseif {2 == $pos} {
        return [Format [uplevel 2 info vars "${mod}*"] ${mod}]
    } elseif {3 == $pos && "variable" == ${cmd}} {
        return [AttemptFromList ${mod} {r w u}]
        return [TryFromList ${mod} {r w u}]
    }
    return ""
}

proc complete(update) {text start end line pos mod} {
    if {1 == $pos && ![llength ${mod}]} {
        return idletasks
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2038

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2041

2042
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2045
2046
2047







-
+













-
+










-
+


-
+





            lappend options(value)    [lindex ${optline} 4]
        }
    }

    if {1 >= ${pos}} {
        set cmds [TrySubCmds ${widget}]
        if {[llength ${cmds}]} {
            return [AttemptFromList ${mod} ${cmds}]
            return [TryFromList ${mod} ${cmds}]
        }
    } elseif {2 <= ${pos} && 
        ([string match ${cmd}* cget] || \
         [string match ${cmd}* configure])} {
        set prev [PreviousWord ${start} ${line}]
        #puts \nprev=|$prev|
        #puts switches=|$options(switches)|
        #puts found=[lsearch -exact ${prev} $options(switches)]
        if {-1 != [set found [lsearch -exact $options(switches) ${prev}]]} {
            if {![llength ${mod}]} {
                return [list "[lindex $options(value) ${found}]"]
            }
        } else {
            return [AttemptFromList ${mod} $options(switches)]
            return [TryFromList ${mod} $options(switches)]
        }
    }
    return ""
}

proc complete(winfo) {text start end line pos mod} {
    set cmd [lindex ${line} 1]
    if {1 >= ${pos}} {
        set cmds [TrySubCmds winfo]
        if {[llength ${cmds}]} {
            return [AttemptFromList ${mod} ${cmds}]
            return [TryFromList ${mod} ${cmds}]
        }
    } elseif {2 == ${pos}} {
        return [AttemptFromList ${mod} [WidgetList ${mod}]]
        return [TryFromList ${mod} [WidgetList ${mod}]]
    }
    return ""
}

}; # namespace tclreadline