mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-11-05 12:39:40 +02:00
547 lines
14 KiB
Plaintext
547 lines
14 KiB
Plaintext
global tcl_interactive
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if {[info exists tcl_interactive] && $tcl_interactive > 0} {
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# ripped from http://wiki.tcl.tk/16139
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foreach {var val} {
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PROMPT {tclsh$::tcl_patchLevel> }
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HISTORY ""
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HISTORY_BUFFER 500
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COMPLETION_MATCH ""
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} {
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if {![info exists env($var)]} {
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set env($var) $val
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}
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}
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foreach {var val} {
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CMDLINE ""
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CMDLINE_CURSOR 0
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CMDLINE_LINES 0
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HISTORY_LEVEL -1
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} {
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set env($var) $val
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}
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unset var val
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set forever 0
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# Resource & history files:
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set HISTFILE $env(HOME)/.tclsh_history
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proc ESC {} {
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return "\033"
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}
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proc readbuf {txt} {
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upvar 1 $txt STRING
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set ret [string index $STRING 0]
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set STRING [string range $STRING 1 end]
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return $ret
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}
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proc goto {row {col 1}} {
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switch -- $row {
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"home" {set row 1}
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}
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print "[ESC]\[${row};${col}H" nowait
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}
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proc gotocol {col} {
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print "\r" nowait
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if {$col > 0} {
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print "[ESC]\[${col}C" nowait
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}
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}
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proc clear {} {
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print "[ESC]\[2J" nowait
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goto home
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}
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proc clearline {} {
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print "[ESC]\[2K\r" nowait
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}
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proc getColumns {} {
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set cols 0
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if {![catch {exec stty -a} err]} {
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regexp {rows \d+; columns (\d+)} $err -> cols
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}
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return $cols
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}
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proc prompt {{txt ""}} {
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global env
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set prompt [subst $env(PROMPT)]
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set txt "$prompt$txt"
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foreach {end mid} $env(CMDLINE_LINES) break
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# Calculate how many extra lines we need to display.
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# Also calculate cursor position:
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set n -1
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set totalLen 0
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set cursorLen [expr {$env(CMDLINE_CURSOR)+[string length $prompt]}]
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set row 0
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set col 0
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# Render output line-by-line to $out then copy back to $txt:
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set found 0
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set out [list]
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foreach line [split $txt "\n"] {
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set len [expr {[string length $line]+1}]
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incr totalLen $len
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if {$found == 0 && $totalLen >= $cursorLen} {
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set cursorLen [expr {$cursorLen - ($totalLen - $len)}]
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set col [expr {$cursorLen % $env(COLUMNS)}]
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set row [expr {$n + ($cursorLen / $env(COLUMNS)) + 1}]
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if {$cursorLen >= $len} {
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set col 0
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incr row
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}
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set found 1
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}
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incr n [expr {int(ceil(double($len)/$env(COLUMNS)))}]
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while {$len > 0} {
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lappend out [string range $line 0 [expr {$env(COLUMNS)-1}]]
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set line [string range $line $env(COLUMNS) end]
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set len [expr {$len-$env(COLUMNS)}]
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}
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}
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set txt [join $out "\n"]
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set row [expr {$n-$row}]
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# Reserve spaces for display:
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if {$end} {
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if {$mid} {
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print "[ESC]\[${mid}B" nowait
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}
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for {set x 0} {$x < $end} {incr x} {
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clearline
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print "[ESC]\[1A" nowait
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}
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}
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clearline
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set env(CMDLINE_LINES) $n
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# Output line(s):
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print "\r$txt"
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if {$row} {
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print "[ESC]\[${row}A" nowait
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}
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gotocol $col
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lappend env(CMDLINE_LINES) $row
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}
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proc print {txt {wait wait}} {
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# Sends output to stdout chunks at a time.
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# This is to prevent the terminal from
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# hanging if we output too much:
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while {[string length $txt]} {
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puts -nonewline [string range $txt 0 2047]
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set txt [string range $txt 2048 end]
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if {$wait == "wait"} {
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after 1
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}
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}
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}
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################################
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# Key bindings
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################################
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proc handleEscapes {} {
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global env
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upvar 1 keybuffer keybuffer
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set seq ""
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set found 0
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while {[set ch [readbuf keybuffer]] != ""} {
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append seq $ch
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switch -exact -- $seq {
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"\[A" { ;# Cursor Up (cuu1,up)
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handleHistory 1
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set found 1; break
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}
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"\[B" { ;# Cursor Down
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handleHistory -1
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set found 1; break
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}
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"\[C" { ;# Cursor Right (cuf1,nd)
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if {$env(CMDLINE_CURSOR) < [string length $env(CMDLINE)]} {
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incr env(CMDLINE_CURSOR)
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}
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set found 1; break
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}
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"\[D" { ;# Cursor Left
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if {$env(CMDLINE_CURSOR) > 0} {
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incr env(CMDLINE_CURSOR) -1
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}
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set found 1; break
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}
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"\[H" -
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"\[7~" -
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"\[1~" { ;# home
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set env(CMDLINE_CURSOR) 0
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set found 1; break
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}
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"\[3~" { ;# delete
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if {$env(CMDLINE_CURSOR) < [string length $env(CMDLINE)]} {
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set env(CMDLINE) [string replace $env(CMDLINE) \
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$env(CMDLINE_CURSOR) $env(CMDLINE_CURSOR)]
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}
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set found 1; break
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}
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"\[F" -
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"\[K" -
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"\[8~" -
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"\[4~" { ;# end
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set env(CMDLINE_CURSOR) [string length $env(CMDLINE)]
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set found 1; break
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}
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"\[5~" { ;# Page Up }
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"\[6~" { ;# Page Down }
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}
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}
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return $found
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}
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proc handleControls {} {
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global env
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upvar 1 char char
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upvar 1 keybuffer keybuffer
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# Control chars start at a == \u0001 and count up.
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switch -exact -- $char {
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\u0004 { ;# ^d
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if { $env(CMDLINE_CURSOR) <= 0 } {
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print "exit\n" nowait
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doExit
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}
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}
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\u0003 { ;# ^c
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print "^C\n" nowait
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doExit
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}
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\u0008 -
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\u007f { ;# ^h && backspace ?
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if {$env(CMDLINE_CURSOR) > 0} {
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incr env(CMDLINE_CURSOR) -1
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set env(CMDLINE) [string replace $env(CMDLINE) \
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$env(CMDLINE_CURSOR) $env(CMDLINE_CURSOR)]
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}
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}
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\u001b { ;# ESC - handle escape sequences
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handleEscapes
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}
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}
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# Rate limiter:
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set keybuffer ""
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}
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proc shortMatch {maybe} {
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# Find the shortest matching substring:
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set maybe [lsort $maybe]
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set shortest [lindex $maybe 0]
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foreach x $maybe {
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while {![string match $shortest* $x]} {
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set shortest [string range $shortest 0 end-1]
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}
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}
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return $shortest
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}
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proc handleCompletion {} {
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global env
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set vars ""
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set cmds ""
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# First find out what kind of word we need to complete:
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set wordstart [string last " " $env(CMDLINE) \
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[expr {$env(CMDLINE_CURSOR)-1}]]
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incr wordstart
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set wordend [string first " " $env(CMDLINE) $wordstart]
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if {$wordend == -1} {
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set wordend end
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} else {
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incr wordend -1
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}
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set word [string range $env(CMDLINE) $wordstart $wordend]
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if {[string trim $word] == ""} return
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set firstchar [string index $word 0]
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# Check if word is a variable:
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if {$firstchar == "\$"} {
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set word [string range $word 1 end]
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incr wordstart
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# Check if it is an array key:
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set x [string first "(" $word]
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if {$x != -1} {
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set v [string range $word 0 [expr {$x-1}]]
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incr x
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set word [string range $word $x end]
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incr wordstart $x
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if {[uplevel #0 "array exists $v"]} {
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set vars [uplevel #0 "array names $v $word*"]
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}
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} else {
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foreach x [uplevel #0 {info vars}] {
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if {[string match $word* $x]} {
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lappend vars $x
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}
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}
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}
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} else {
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if {$firstchar == "\[" || $wordstart == 0} {
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if {$firstchar == "\["} {
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set word [string range $word 1 end]
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incr wordstart
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}
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# Check commands:
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foreach x [info commands] {
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if {[string match $word* $x]} {
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lappend cmds $x
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}
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}
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} else {
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# Check commands anyway:
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foreach x [info commands] {
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if {[string match $word* $x]} {
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lappend cmds $x
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}
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}
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}
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if {$wordstart != 0} {
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# Check variables anyway:
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set x [string first "(" $word]
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if {$x != -1} {
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set v [string range $word 0 [expr {$x-1}]]
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incr x
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set word [string range $word $x end]
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incr wordstart $x
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if {[uplevel #0 "array exists $v"]} {
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set vars [uplevel #0 "array names $v $word*"]
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}
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} else {
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foreach x [uplevel #0 {info vars}] {
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if {[string match $word* $x]} {
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lappend vars $x
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}
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}
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}
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}
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}
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set maybe [concat $vars $cmds]
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set shortest [shortMatch $maybe]
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if {"$word" == "$shortest"} {
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if {[llength $maybe] > 1 && $env(COMPLETION_MATCH) != $maybe} {
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set env(COMPLETION_MATCH) $maybe
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clearline
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set temp ""
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foreach {match format} {
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vars "35"
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cmds "1;32"
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} {
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if {[llength $match]} {
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append temp "[ESC]\[${format}m"
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foreach x [set $match] {
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append temp "[file tail $x] "
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}
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append temp "[ESC]\[0m"
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}
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}
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print "\n$temp\n"
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}
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}
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}
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proc handleHistory {x} {
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global env
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set hlen [llength $env(HISTORY)]
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incr env(HISTORY_LEVEL) $x
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if {$env(HISTORY_LEVEL) > -1} {
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set env(CMDLINE) [lindex $env(HISTORY) end-$env(HISTORY_LEVEL)]
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set env(CMDLINE_CURSOR) [string length $env(CMDLINE)]
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}
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if {$env(HISTORY_LEVEL) <= -1} {
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set env(HISTORY_LEVEL) -1
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set env(CMDLINE) ""
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set env(CMDLINE_CURSOR) 0
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} elseif {$env(HISTORY_LEVEL) > $hlen} {
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set env(HISTORY_LEVEL) $hlen
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}
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}
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################################
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# History handling functions
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################################
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proc getHistory {} {
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global env
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return $env(HISTORY)
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}
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proc setHistory {hlist} {
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global env
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set env(HISTORY) $hlist
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}
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proc appendHistory {cmdline} {
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global env
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set old [lsearch -exact $env(HISTORY) $cmdline]
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if {$old != -1} {
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set env(HISTORY) [lreplace $env(HISTORY) $old $old]
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}
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lappend env(HISTORY) $cmdline
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set env(HISTORY) \
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[lrange $env(HISTORY) end-$env(HISTORY_BUFFER) end]
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}
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################################
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# main()
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################################
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proc rawInput {} {
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fconfigure stdin -buffering none -blocking 0
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fconfigure stdout -buffering none -translation crlf
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exec stty raw -echo
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}
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proc lineInput {} {
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fconfigure stdin -buffering line -blocking 1
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fconfigure stdout -buffering line
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exec stty -raw echo
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}
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proc doExit {{code 0}} {
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global env HISTFILE
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# Reset terminal:
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# print "[ESC]c[ESC]\[2J" nowait
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lineInput
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set hlist [getHistory]
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if {[llength $hlist] > 0} {
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set f [open $HISTFILE w]
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foreach x $hlist {
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# Escape newlines:
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puts $f [string map {
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\n "\\n"
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"\\" "\\b"
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} $x]
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}
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close $f
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}
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___exit $code
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}
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# Load history if available:
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if {[llength $env(HISTORY)] == 0} {
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if {[file exists $HISTFILE]} {
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set f [open $HISTFILE r]
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set hlist [list]
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foreach x [split [read $f] "\n"] {
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if {$x != ""} {
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# Undo newline escapes:
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lappend hlist [string map {
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"\\n" \n
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"\\\\" "\\"
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"\\b" "\\"
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} $x]
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}
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}
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setHistory $hlist
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unset hlist
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close $f
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}
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}
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rawInput
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rename exit ___exit
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proc exit args doExit
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proc tclline {} {
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global env
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set char ""
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set keybuffer [read stdin]
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set env(COLUMNS) [getColumns]
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while {$keybuffer != ""} {
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if {[eof stdin]} return
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set char [readbuf keybuffer]
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if {$char == ""} {
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# Sleep for a bit to reduce CPU time:
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after 40
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continue
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}
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if {[string is print $char]} {
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set x $env(CMDLINE_CURSOR)
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if {$x < 1 && [string trim $char] == ""} continue
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set trailing [string range $env(CMDLINE) $x end]
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set env(CMDLINE) [string replace $env(CMDLINE) $x end]
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append env(CMDLINE) $char
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append env(CMDLINE) $trailing
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incr env(CMDLINE_CURSOR)
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} elseif {$char == "\t"} {
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handleCompletion
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} elseif {$char == "\n" || $char == "\r"} {
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if {[info complete $env(CMDLINE)] &&
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[string index $env(CMDLINE) end] != "\\"} {
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lineInput
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print "\n" nowait
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uplevel #0 {
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global env
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# Run the command:
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if { [catch $env(CMDLINE) res] } {
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print "[ESC]\[1;31m\[[ESC]\[0;31mError[ESC]\[1;31m\][ESC]\[0m "
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}
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if {$res != ""} {
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print "$res\n"
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}
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# Append HISTORY:
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set env(HISTORY_LEVEL) -1
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appendHistory $env(CMDLINE)
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set env(CMDLINE) ""
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set env(CMDLINE_CURSOR) 0
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set env(CMDLINE_LINES) {0 0}
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}
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rawInput
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} else {
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set x $env(CMDLINE_CURSOR)
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if {$x < 1 && [string trim $char] == ""} continue
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set trailing [string range $env(CMDLINE) $x end]
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set env(CMDLINE) [string replace $env(CMDLINE) $x end]
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append env(CMDLINE) $char
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append env(CMDLINE) $trailing
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incr env(CMDLINE_CURSOR)
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}
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} else {
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handleControls
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}
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}
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prompt $env(CMDLINE)
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}
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tclline
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fileevent stdin readable tclline
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vwait forever
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doExit
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}
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