ansi DEC modes, DECRQSS+DECRPSS, minor sixel work

src/bootsupport/modules/overtype-1.7.4.tm

@@ -3327,10 +3327,12 @@ tcl::namespace::eval overtype {
                         }
                         7DCS {
                             #ESC P
+                            #e.g sixel
                             #Device Control String  https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Controls-beginning-with-ESC:ESC-F.C74
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 2 end]]
                         }
                         8DCS {
+                            #e.g sixel
                             #8-bit Device Control String
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 1 end]]
                         }
@@ -4466,6 +4468,107 @@ tcl::namespace::eval overtype {
 
                         }
                         7DCS - 8DCS {
+                            #match 'DCS P1 ; P2 ; P3' (without spaces)
+                            # where Ps1,P2,P3 are all optional and P1,P2 are single digit and P3 can *technically* be any positive integer but is usually ignored (commonly set to zero)
+                            # Our regexp isn't precise as we will validate number of params and values after matching - but we will assume P3 should be small (review for micrometres - could be 4 digits? more?)
+                            # (limit to 10 chars to avoid insane values?)
+                            #https://github.com/hackerb9/vt340test/blob/main/physicalsixels.md
+                            # P1P2P3q - "Protocol Selector"
+                            #    P1 - Pixel Aspect Ratio (Vertical:Horizontal)
+                            #    P2 - background control
+                            #    P3 - horizontal grid size (default units decipoints 1/720 inch - but theoretically controlled by ANSI SSU sequence)
+                            # P1P2P3 commonly omitted - with subsequent <DQ>P4;P5;P6;P7 "Raster Attributes (DECGRA)" being used for:
+                            # Aspect Ratio (P4,P5)
+                            set sixelstart [tcl::string::range $codenorm 4 13]
+                            set sixelmatch [regexp -all -inline {^((?:[0-9]*;){0,2}(?:[0-9]*))q} $sixelstart]
+                            if {[llength $sixelmatch] == 2} {
+                                #sixel
+                                #note sixel data can have newlines before ST
+                                set sixelparams [lindex $sixelmatch 1]
+                                set params [split $sixelparams {;}]
+                                set badsixelparams 0
+                                if {[llength $params] > 3} {
+                                    set badsixelparams 1
+                                }
+                                lassign $params P1 P2 P3
+                                if {[string length $P1] > 1 || [string length $P2] > 1 || [string length $P3] > 3} {
+                                    set badsixelparams 1
+                                }
+                                if {$badsixelparams} {
+                                    puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but bad params. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                } else {
+                                    #todo - move to punk::sixel library
+
+                                    #P1 - Pixel Aspect Ratio
+                                    # round(10/P1):1 if 2<= P1 <= 9) 2:1 otherwise
+                                    # omitted 2:1 (default)
+                                    # 0,1     2:1
+                                    # 2       5:1
+                                    # 3,4     3:1
+                                    # 5,6     2:1
+                                    # 7,8,9   1:1
+                                    switch -- $P1 {
+                                        "" - 0 - 1 {
+                                            #omitted (default)
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        2 {
+                                            set sixel_pixel_aspect "5:1"
+                                        }
+                                        3 - 4 {
+                                            set sixel_pixel_aspect "3:1"
+                                        }
+                                        5 - 6 {
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        7 - 8 - 9 {
+                                            set sixel_pixel_aspect "1:1"
+                                        }
+                                        default {
+                                            set sixel_pixel_aspect "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P1 (pixel aspect ratio). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+                                    #P2 - background colour
+                                    # 0,2 (default)   pixel positions specified as 0 are set to current bg colour
+                                    # 1               pixel positions specified as 0 remain at current colour
+                                    switch -- $P2 {
+                                        "" - 0 - 2 {
+                                            set sixel_background "current_background"
+                                        }
+                                        1 {
+                                            set sixel_background "transparent"
+                                        }
+                                        default {
+                                            set sixel_background "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P2 (background control). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+
+                                    #P3 horizontal grid size - ignored on VT300 - commonly set to zero
+
+                                    # ECMA-48 SSU (ESC Ps <sp> I)
+                                    #  0 - CHARACTER
+                                    #  1 - MILLIMETRE
+                                    #  2 - COMPUTER DECIPOINT 0.03528mm 1/720 of 25.4mm)
+                                    #  3 - DECIDIDOT 0.03759mm (10/266mm)
+                                    #  4 - MIL 0.0254mm (1/1000 of 25.4mm)
+                                    #  5 - BASIC MEASURING UNIT (BMU) 0.02117mm (1/1200 of 25.4mm)
+                                    #  6 - MICROMETRE 0.001mm
+                                    #  7 - PIXEL - the smallest increment that can be specified in a device
+                                    #  8 - DECIPOINT - 0.03514mm (35/996mm)
+                                    set sixel_horizontal_grid $P3
+                                    set sixel_ssu "decipoint" ;#todo?
+
+                                    #todo - look for and  parse DECGRA introduced by double quote
+                                    puts stderr "overtype::renderline SIXEL aspect: $sixel_pixel_aspect bg: $sixel_background hgrid: $sixel_horizontal_grid. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+
+
+                                    #todo
+                                }
+                            } else {
                                 puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING command UNIMPLEMENTED. code [ansistring VIEW -lf 1 -vt 1 -nul 1 $code]"
                                 #ST (string terminator) \x9c or \x1b\\
                                 if {[tcl::string::index $codenorm end] eq "\x9c"} {
@@ -4473,7 +4576,7 @@ tcl::namespace::eval overtype {
                                 } else {
                                     set code_content [tcl::string::range $codenorm 4 end-2] ;#ST is \x1b\\
                                 }
-
+                            }
                         }
                         7OSC - 8OSC {
                             # OSCs are terminated with ST of either \007 or \x1b\\ - we allow either whether code was 7 or 8 bit

src/bootsupport/modules/punk/ansi-0.1.1.tm

@@ -5039,6 +5039,10 @@ Brightblack 100   Brightred 101   Brightgreen 102   Brightyellow 103   Brightblu
     #    mouse_urxvt             1015\
     #    mouse_sgr_pixel               1016\
     #]
+    #
+    # some more ansi mode/sequence info:
+    #https://pkg.go.dev/github.com/charmbracelet/x/ansi
+
     variable decmode_data {
         1   {
                 {origin DEC description "DECCKM - Cursor Keys Mode" names {DECCKM cursor_keys}}
@@ -5059,6 +5063,9 @@ In VT52 mode - use \x1b< to exit.
         5   {
                 {origin DEC description "DECSCNM - Screen Mode (light or dark screen)" names {DECSNM lightmode}}
         }
+        6   {
+                {origin DEC description "DECOM - Origin Mode (whether cursor is restricted to within page margins)" names {DECOM}}
+        }
         7   {
                 {origin DEC description "DECAWM - Auto Wrap Mode" names {DECAWM line_wrap}}
         }
@@ -5090,7 +5097,13 @@ be as if this was off - ie lone CR.
                 {origin DEC   description "DECGRPM - Graphics Rotated Print Mode (obsolete?)" names {DECGRPM}}
         }
         66  {
-                {origin DEC description "DECNKM - Numeric Keypad Mode" names {DECNKM}}
+                {origin DEC description "DECNKM - Numeric Keypad Mode" see "https://vt100.net/docs/vt510-rm/DECNKM.html" names {DECNKM}}
+        }
+        67  {
+                {origin DEC description "DECBKM - Backarrow Key Mode" see "https://vt100.net/docs/vt510-rm/DECBKM.html" names {DECBKM}}
+        }
+        69  {
+                {origin DEC description "DECLRMM - Left Right Margin Mode" see "https://vt100.net/docs/vt510-rm/DECLRMM.html" names {DECLRMM}}
         }
         1000 {
                 {origin "xterm" description  "VT200 compatibility mouse" names {SET_VT200_MOUSE} note {

src/bootsupport/modules/punk/console-0.1.1.tm

@@ -570,6 +570,14 @@ namespace eval punk::console {
         puts -nonewline stdout \x1b\[?1006l
         flush stdout
     }
+    proc enable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000h\x1b\[?1003h\x1b\[?1016h
+        flush stdout
+    }
+    proc disable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000l\x1b\[?1003l\x1b\[?1016l
+        flush stdout
+    }
     proc enable_bracketed_paste {} {
         puts -nonewline stdout \x1b\[?2004h
     }
@@ -1762,6 +1770,158 @@ namespace eval punk::console {
         puts -nonewline "\x1b\[?${m}l"
     }
 
+    variable has_mode_cache
+    set has_mode_cache [dict create]
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::has_mode
+        @cmd    -name   punk::console::has_mode\
+            -summary\
+            {Check if console supports DEC mode}\
+            -help\
+            {Check if console supports DEC mode by emitting query to the console using
+            the sequence:
+              ESC [ ? <n> $ p
+            Where <n> is an integer identifier.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        -refresh -type none
+        @values -min 1 -max 1
+        mode -type {int|string} -help\
+            "integer for DEC mode, or name as in the dict:
+            ::punk::ansi::decmode_names"
+    }]
+    proc has_mode {args} {
+        set argd [punk::args::parse $args withid ::punk::console::has_mode]
+        lassign [dict values $argd] leaders opts values received
+        set console [dict get $opts -console]
+        set num_or_name [dict get $values mode]
+        if {[dict exists $received -refresh]} {
+            set do_refresh 1
+        } else {
+            set do_refresh 0
+        }
+
+        if {[string is integer -strict $num_or_name]} {
+            set m $num_or_name
+        } else {
+            upvar ::punk::ansi::decmode_names decmode_names
+            if {[dict exists $decmode_names $num_or_name]} {
+                set m [dict get $decmode_names $num_or_name]
+            } else {
+                error "punk::console::get_mode unrecognised mode '$num_or_name'. Known mode names: [dict keys $decmode_names]"
+            }
+        }
+        variable has_mode_cache
+        if {$do_refresh} {
+            if {[dict exists $has_mode_cache $console $m]} {
+                dict unset has_mode_cache $console $m
+            }
+        }
+
+        if {![dict exists $has_mode_cache $console $m]} {
+            set capturingregex [string map [list %MODE% $m] {(.*)(\x1b\[\?%MODE%;([0-9]+)\$y)$}] ;#must capture prefix,entire-response,response-payload
+            set request "\x1b\[?$m\$p"
+            set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+            set has_mode [expr {$payload != 0}]
+            dict set has_mode_cache $console $m $has_mode
+        } else {
+            set has_mode [dict get $has_mode_cache $console $m]
+        }
+        return $has_mode
+    }
+
+    set DECRQSS_DATA {
+        "Select Active Status Display"      DECSASD     "$\}"
+        "Select Attribute Change Extent"    DECSACE     "*x"
+        "Set Character Attribute"           DECSCA      "\"q"
+        "Set Conformance Level"             DECSCL      "\"p"
+        "Set Columns Per Page"              DECSCPP     "\$|"
+        "Set Lines Per Page"                DECSLPP     "t"
+        "Set Number of Lines per Screen"    DECSNLS     "*|"
+        "Set Status Line Type"              DECSSDT     "$~"
+        "Set Left and Right Margins"        DECSLRM     "s"
+        "Set Top and Bottom Margins"        DECSTBM     "r"
+        "Set Graphic Rendition"             SGR         "m"
+        "Select Set-Up Language"            DECSSL      "p"
+        "Select Printer Type"               DECSPRTT    "\$s"
+        "Select Refresh Rate"               DECSRFR     "\"t"
+        "Select Digital Printed Data Type"  DECSDPT     "(p"
+        "Select ProPrinter Character Set"   DECSPPCS    "*p"
+        "Select Communication Speed"        DECSCS      "*r"
+        "Select Communication Port"         DECSCP      "*u"
+        "Set Scroll Speed"                  DECSSCLS    " p"
+        "Set Cursor Style"                  DECSCUSR    " q"
+        "Set Key Click Volume"              DECSKCV     " r"
+        "Set Warning Bell Volume"           DECSWBV     " t"
+        "Set Margin Bell Volume"            DECSMBV     " u"
+        "Set Lock Key Style"                DECSLCK     " v"
+        "Select Flow Control Type"          DECSFC      "*s"
+        "Select Disconnect Delay Time"      DECSDDT     "\$q"
+        "Set Transmit Rate Limit"           DECSTRL     "u"
+        "Set Port Parameter"                DECSPP      "\+w"
+    }
+    set DECRQSS_DICT [dict create]
+    foreach {desc name str} $DECRQSS_DATA {
+        dict set DECRQSS_DICT $name $str
+    }
+
+    #emit DECRQSS and get DECRPSS response
+    # ---------------------
+    #NOTE: https://vt100.net/docs/vt510-rm/DECRPSS.html
+    #response: DCS Ps $ r D...D ST
+    #Conflict between above doc saying Ps of 0 indicates a valid request and 1 indicates invalid - and the behaviour of windows terminal, wezterm and the reported xterm behaviour
+    # shown at: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    #REVIEW
+    # ---------------------
+    #Note also on Freebsd xterm we seem to getresponse ': 1 $ r D...D ST'
+    #(no leading DCS) - this 
+
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::request_dec_setting
+        @cmd    -name   punk::console::request_dec_setting\
+            -summary\
+            {Perform DECRQSS query to get DECRPSS response}\
+            -help\
+            {DECRQSS query for DEC Selection or Setting.
+            Return payload from console's DECRPSS response.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        @values -min 1 -max 1
+        name -type string
+    }]
+    proc request_dec_setting {args} {
+        set argd [punk::args::parse $args withid ::punk::console::request_dec_setting]
+        lassign [dict values $argd] leaders opts values
+        set console [dict get $opts -console]
+        set name [dict get $values name]
+
+        variable DECRQSS_DICT
+        if {![dict exists $DECRQSS_DICT $name]} {
+            error "request_dec_setting unrecognised name $name. Known values: [dict keys $DECRQSS_DICT]"
+        }
+        set str [dict get $DECRQSS_DICT $name]
+        set re_str [string map [list * \\* \$ \\\$ + \\+ ( \\(] $str] ;#regex escaped
+        #review {[0-9;:]} - too restrictive? - what values can be returned? alnum? - we perhaps at least need to exclude ESC so we don't overmatch
+        set capturingregex [string map [list %s% $re_str] {(.*)(\x1bP([0-1]\$r[0-9;:]*)(?:%s%){0,1}\x1b\\)$}] ;#must capture prefix,entire-response,response-payload
+        #todo - handle xterm : [0-1] $ r D...D ST
+        set request "\x1bP\$q${str}\x1b\\"
+        set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+        set c1 [string index $payload 0]
+        switch -- $c1 {
+            0 {
+                error "request_dec_setting - terminal doesn't recognise request '[punk::ansi::ansistring VIEW $request]' as valid"
+            }
+            1 {}
+            default {
+                #shouldn't get here
+                error "request_dec_setting - unrecognised response to request '[punk::ansi::ansistring VIEW $request]'. payload: [punk::ansi::ansistring VIEW $payload]"
+            }
+        }
+        #strip leading 1$r
+        return [string range $payload 3 end]
+    }
 
     #terminals lie. This should be a reasonable (albeit relatively slow) test of actual width - but some terminals seem to miscalculate.
     #todo - a visual interactive test/questionnaire to ask user if things are lining up or if the terminal is telling fibs about cursor position.

src/modules/overtype-999999.0a1.0.tm

@@ -3327,10 +3327,12 @@ tcl::namespace::eval overtype {
                         }
                         7DCS {
                             #ESC P
+                            #e.g sixel
                             #Device Control String  https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Controls-beginning-with-ESC:ESC-F.C74
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 2 end]]
                         }
                         8DCS {
+                            #e.g sixel
                             #8-bit Device Control String
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 1 end]]
                         }
@@ -4466,6 +4468,107 @@ tcl::namespace::eval overtype {
 
                         }
                         7DCS - 8DCS {
+                            #match 'DCS P1 ; P2 ; P3' (without spaces)
+                            # where Ps1,P2,P3 are all optional and P1,P2 are single digit and P3 can *technically* be any positive integer but is usually ignored (commonly set to zero)
+                            # Our regexp isn't precise as we will validate number of params and values after matching - but we will assume P3 should be small (review for micrometres - could be 4 digits? more?)
+                            # (limit to 10 chars to avoid insane values?)
+                            #https://github.com/hackerb9/vt340test/blob/main/physicalsixels.md
+                            # P1P2P3q - "Protocol Selector"
+                            #    P1 - Pixel Aspect Ratio (Vertical:Horizontal)
+                            #    P2 - background control
+                            #    P3 - horizontal grid size (default units decipoints 1/720 inch - but theoretically controlled by ANSI SSU sequence)
+                            # P1P2P3 commonly omitted - with subsequent <DQ>P4;P5;P6;P7 "Raster Attributes (DECGRA)" being used for:
+                            # Aspect Ratio (P4,P5)
+                            set sixelstart [tcl::string::range $codenorm 4 13]
+                            set sixelmatch [regexp -all -inline {^((?:[0-9]*;){0,2}(?:[0-9]*))q} $sixelstart]
+                            if {[llength $sixelmatch] == 2} {
+                                #sixel
+                                #note sixel data can have newlines before ST
+                                set sixelparams [lindex $sixelmatch 1]
+                                set params [split $sixelparams {;}]
+                                set badsixelparams 0
+                                if {[llength $params] > 3} {
+                                    set badsixelparams 1
+                                }
+                                lassign $params P1 P2 P3
+                                if {[string length $P1] > 1 || [string length $P2] > 1 || [string length $P3] > 3} {
+                                    set badsixelparams 1
+                                }
+                                if {$badsixelparams} {
+                                    puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but bad params. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                } else {
+                                    #todo - move to punk::sixel library
+
+                                    #P1 - Pixel Aspect Ratio
+                                    # round(10/P1):1 if 2<= P1 <= 9) 2:1 otherwise
+                                    # omitted 2:1 (default)
+                                    # 0,1     2:1
+                                    # 2       5:1
+                                    # 3,4     3:1
+                                    # 5,6     2:1
+                                    # 7,8,9   1:1
+                                    switch -- $P1 {
+                                        "" - 0 - 1 {
+                                            #omitted (default)
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        2 {
+                                            set sixel_pixel_aspect "5:1"
+                                        }
+                                        3 - 4 {
+                                            set sixel_pixel_aspect "3:1"
+                                        }
+                                        5 - 6 {
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        7 - 8 - 9 {
+                                            set sixel_pixel_aspect "1:1"
+                                        }
+                                        default {
+                                            set sixel_pixel_aspect "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P1 (pixel aspect ratio). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+                                    #P2 - background colour
+                                    # 0,2 (default)   pixel positions specified as 0 are set to current bg colour
+                                    # 1               pixel positions specified as 0 remain at current colour
+                                    switch -- $P2 {
+                                        "" - 0 - 2 {
+                                            set sixel_background "current_background"
+                                        }
+                                        1 {
+                                            set sixel_background "transparent"
+                                        }
+                                        default {
+                                            set sixel_background "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P2 (background control). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+
+                                    #P3 horizontal grid size - ignored on VT300 - commonly set to zero
+
+                                    # ECMA-48 SSU (ESC Ps <sp> I)
+                                    #  0 - CHARACTER
+                                    #  1 - MILLIMETRE
+                                    #  2 - COMPUTER DECIPOINT 0.03528mm 1/720 of 25.4mm)
+                                    #  3 - DECIDIDOT 0.03759mm (10/266mm)
+                                    #  4 - MIL 0.0254mm (1/1000 of 25.4mm)
+                                    #  5 - BASIC MEASURING UNIT (BMU) 0.02117mm (1/1200 of 25.4mm)
+                                    #  6 - MICROMETRE 0.001mm
+                                    #  7 - PIXEL - the smallest increment that can be specified in a device
+                                    #  8 - DECIPOINT - 0.03514mm (35/996mm)
+                                    set sixel_horizontal_grid $P3
+                                    set sixel_ssu "decipoint" ;#todo?
+
+                                    #todo - look for and  parse DECGRA introduced by double quote
+                                    puts stderr "overtype::renderline SIXEL aspect: $sixel_pixel_aspect bg: $sixel_background hgrid: $sixel_horizontal_grid. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+
+
+                                    #todo
+                                }
+                            } else {
                                 puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING command UNIMPLEMENTED. code [ansistring VIEW -lf 1 -vt 1 -nul 1 $code]"
                                 #ST (string terminator) \x9c or \x1b\\
                                 if {[tcl::string::index $codenorm end] eq "\x9c"} {
@@ -4473,7 +4576,7 @@ tcl::namespace::eval overtype {
                                 } else {
                                     set code_content [tcl::string::range $codenorm 4 end-2] ;#ST is \x1b\\
                                 }
-
+                            }
                         }
                         7OSC - 8OSC {
                             # OSCs are terminated with ST of either \007 or \x1b\\ - we allow either whether code was 7 or 8 bit

src/modules/punk/ansi-999999.0a1.0.tm

@@ -5039,6 +5039,10 @@ Brightblack 100   Brightred 101   Brightgreen 102   Brightyellow 103   Brightblu
     #    mouse_urxvt             1015\
     #    mouse_sgr_pixel               1016\
     #]
+    #
+    # some more ansi mode/sequence info:
+    #https://pkg.go.dev/github.com/charmbracelet/x/ansi
+
     variable decmode_data {
         1   {
                 {origin DEC description "DECCKM - Cursor Keys Mode" names {DECCKM cursor_keys}}
@@ -5059,6 +5063,9 @@ In VT52 mode - use \x1b< to exit.
         5   {
                 {origin DEC description "DECSCNM - Screen Mode (light or dark screen)" names {DECSNM lightmode}}
         }
+        6   {
+                {origin DEC description "DECOM - Origin Mode (whether cursor is restricted to within page margins)" names {DECOM}}
+        }
         7   {
                 {origin DEC description "DECAWM - Auto Wrap Mode" names {DECAWM line_wrap}}
         }
@@ -5090,7 +5097,13 @@ be as if this was off - ie lone CR.
                 {origin DEC   description "DECGRPM - Graphics Rotated Print Mode (obsolete?)" names {DECGRPM}}
         }
         66  {
-                {origin DEC description "DECNKM - Numeric Keypad Mode" names {DECNKM}}
+                {origin DEC description "DECNKM - Numeric Keypad Mode" see "https://vt100.net/docs/vt510-rm/DECNKM.html" names {DECNKM}}
+        }
+        67  {
+                {origin DEC description "DECBKM - Backarrow Key Mode" see "https://vt100.net/docs/vt510-rm/DECBKM.html" names {DECBKM}}
+        }
+        69  {
+                {origin DEC description "DECLRMM - Left Right Margin Mode" see "https://vt100.net/docs/vt510-rm/DECLRMM.html" names {DECLRMM}}
         }
         1000 {
                 {origin "xterm" description  "VT200 compatibility mouse" names {SET_VT200_MOUSE} note {

src/modules/punk/console-999999.0a1.0.tm

@@ -570,6 +570,14 @@ namespace eval punk::console {
         puts -nonewline stdout \x1b\[?1006l
         flush stdout
     }
+    proc enable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000h\x1b\[?1003h\x1b\[?1016h
+        flush stdout
+    }
+    proc disable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000l\x1b\[?1003l\x1b\[?1016l
+        flush stdout
+    }
     proc enable_bracketed_paste {} {
         puts -nonewline stdout \x1b\[?2004h
     }
@@ -1762,6 +1770,158 @@ namespace eval punk::console {
         puts -nonewline "\x1b\[?${m}l"
     }
 
+    variable has_mode_cache
+    set has_mode_cache [dict create]
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::has_mode
+        @cmd    -name   punk::console::has_mode\
+            -summary\
+            {Check if console supports DEC mode}\
+            -help\
+            {Check if console supports DEC mode by emitting query to the console using
+            the sequence:
+              ESC [ ? <n> $ p
+            Where <n> is an integer identifier.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        -refresh -type none
+        @values -min 1 -max 1
+        mode -type {int|string} -help\
+            "integer for DEC mode, or name as in the dict:
+            ::punk::ansi::decmode_names"
+    }]
+    proc has_mode {args} {
+        set argd [punk::args::parse $args withid ::punk::console::has_mode]
+        lassign [dict values $argd] leaders opts values received
+        set console [dict get $opts -console]
+        set num_or_name [dict get $values mode]
+        if {[dict exists $received -refresh]} {
+            set do_refresh 1
+        } else {
+            set do_refresh 0
+        }
+
+        if {[string is integer -strict $num_or_name]} {
+            set m $num_or_name
+        } else {
+            upvar ::punk::ansi::decmode_names decmode_names
+            if {[dict exists $decmode_names $num_or_name]} {
+                set m [dict get $decmode_names $num_or_name]
+            } else {
+                error "punk::console::get_mode unrecognised mode '$num_or_name'. Known mode names: [dict keys $decmode_names]"
+            }
+        }
+        variable has_mode_cache
+        if {$do_refresh} {
+            if {[dict exists $has_mode_cache $console $m]} {
+                dict unset has_mode_cache $console $m
+            }
+        }
+
+        if {![dict exists $has_mode_cache $console $m]} {
+            set capturingregex [string map [list %MODE% $m] {(.*)(\x1b\[\?%MODE%;([0-9]+)\$y)$}] ;#must capture prefix,entire-response,response-payload
+            set request "\x1b\[?$m\$p"
+            set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+            set has_mode [expr {$payload != 0}]
+            dict set has_mode_cache $console $m $has_mode
+        } else {
+            set has_mode [dict get $has_mode_cache $console $m]
+        }
+        return $has_mode
+    }
+
+    set DECRQSS_DATA {
+        "Select Active Status Display"      DECSASD     "$\}"
+        "Select Attribute Change Extent"    DECSACE     "*x"
+        "Set Character Attribute"           DECSCA      "\"q"
+        "Set Conformance Level"             DECSCL      "\"p"
+        "Set Columns Per Page"              DECSCPP     "\$|"
+        "Set Lines Per Page"                DECSLPP     "t"
+        "Set Number of Lines per Screen"    DECSNLS     "*|"
+        "Set Status Line Type"              DECSSDT     "$~"
+        "Set Left and Right Margins"        DECSLRM     "s"
+        "Set Top and Bottom Margins"        DECSTBM     "r"
+        "Set Graphic Rendition"             SGR         "m"
+        "Select Set-Up Language"            DECSSL      "p"
+        "Select Printer Type"               DECSPRTT    "\$s"
+        "Select Refresh Rate"               DECSRFR     "\"t"
+        "Select Digital Printed Data Type"  DECSDPT     "(p"
+        "Select ProPrinter Character Set"   DECSPPCS    "*p"
+        "Select Communication Speed"        DECSCS      "*r"
+        "Select Communication Port"         DECSCP      "*u"
+        "Set Scroll Speed"                  DECSSCLS    " p"
+        "Set Cursor Style"                  DECSCUSR    " q"
+        "Set Key Click Volume"              DECSKCV     " r"
+        "Set Warning Bell Volume"           DECSWBV     " t"
+        "Set Margin Bell Volume"            DECSMBV     " u"
+        "Set Lock Key Style"                DECSLCK     " v"
+        "Select Flow Control Type"          DECSFC      "*s"
+        "Select Disconnect Delay Time"      DECSDDT     "\$q"
+        "Set Transmit Rate Limit"           DECSTRL     "u"
+        "Set Port Parameter"                DECSPP      "\+w"
+    }
+    set DECRQSS_DICT [dict create]
+    foreach {desc name str} $DECRQSS_DATA {
+        dict set DECRQSS_DICT $name $str
+    }
+
+    #emit DECRQSS and get DECRPSS response
+    # ---------------------
+    #NOTE: https://vt100.net/docs/vt510-rm/DECRPSS.html
+    #response: DCS Ps $ r D...D ST
+    #Conflict between above doc saying Ps of 0 indicates a valid request and 1 indicates invalid - and the behaviour of windows terminal, wezterm and the reported xterm behaviour
+    # shown at: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    #REVIEW
+    # ---------------------
+    #Note also on Freebsd xterm we seem to getresponse ': 1 $ r D...D ST'
+    #(no leading DCS) - this 
+
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::request_dec_setting
+        @cmd    -name   punk::console::request_dec_setting\
+            -summary\
+            {Perform DECRQSS query to get DECRPSS response}\
+            -help\
+            {DECRQSS query for DEC Selection or Setting.
+            Return payload from console's DECRPSS response.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        @values -min 1 -max 1
+        name -type string
+    }]
+    proc request_dec_setting {args} {
+        set argd [punk::args::parse $args withid ::punk::console::request_dec_setting]
+        lassign [dict values $argd] leaders opts values
+        set console [dict get $opts -console]
+        set name [dict get $values name]
+
+        variable DECRQSS_DICT
+        if {![dict exists $DECRQSS_DICT $name]} {
+            error "request_dec_setting unrecognised name $name. Known values: [dict keys $DECRQSS_DICT]"
+        }
+        set str [dict get $DECRQSS_DICT $name]
+        set re_str [string map [list * \\* \$ \\\$ + \\+ ( \\(] $str] ;#regex escaped
+        #review {[0-9;:]} - too restrictive? - what values can be returned? alnum? - we perhaps at least need to exclude ESC so we don't overmatch
+        set capturingregex [string map [list %s% $re_str] {(.*)(\x1bP([0-1]\$r[0-9;:]*)(?:%s%){0,1}\x1b\\)$}] ;#must capture prefix,entire-response,response-payload
+        #todo - handle xterm : [0-1] $ r D...D ST
+        set request "\x1bP\$q${str}\x1b\\"
+        set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+        set c1 [string index $payload 0]
+        switch -- $c1 {
+            0 {
+                error "request_dec_setting - terminal doesn't recognise request '[punk::ansi::ansistring VIEW $request]' as valid"
+            }
+            1 {}
+            default {
+                #shouldn't get here
+                error "request_dec_setting - unrecognised response to request '[punk::ansi::ansistring VIEW $request]'. payload: [punk::ansi::ansistring VIEW $payload]"
+            }
+        }
+        #strip leading 1$r
+        return [string range $payload 3 end]
+    }
 
     #terminals lie. This should be a reasonable (albeit relatively slow) test of actual width - but some terminals seem to miscalculate.
     #todo - a visual interactive test/questionnaire to ask user if things are lining up or if the terminal is telling fibs about cursor position.

src/modules/punk/sixel-999999.0a1.0.tm

@@ -134,7 +134,7 @@ tcl::namespace::eval punk::sixel {
         if {$cell_size_override ne ""} {
             lassign [split [string tolower $cell_size_override] x] cwidth cheight
             if {![string is integer -strict $cwidth] || ![string is integer -strict $cheight]} {
-                error "punk::sixel::get_info -cell_sixe must be of the form WxH where W and H are positive integers"
+                error "punk::sixel::get_info -cell_sixel must be of the form WxH where W and H are positive integers"
             }
             set cell_size $cell_size_override
         } else {
@@ -143,7 +143,11 @@ tcl::namespace::eval punk::sixel {
         lassign [split $cell_size x] cwidth cheight
         set height_cells [expr {int(ceil($height_pixels /double($cheight)))}] 
         set sixelparams ""
-        set sixel_extents [list] ;#number of sixes in each line taking into account retraces due to $
+        set sixel_extents [list] ;#number of sixels in each line taking into account retraces due to $
+
+        #REVIEW
+        #There can be multiple raster-attribute instructions repeatedly changing the size and aspect ratio of subsequent pixels.
+        #see sixel/multisize.six
 
         set line0 [lindex $raster_lines 0]
         if {[regexp -indices {^\x1bP([;0-9]*)q} $line0 i_match]} {
@@ -219,6 +223,48 @@ tcl::namespace::eval punk::sixel {
     }
 
 
+    punk::args::define {
+        @id     -id ::punk::sixel::can_sixel
+        @cmd    -name punk::sixel::can_sixel\
+            -summary\
+            "Report whether terminal can display sixel graphics."\
+            -help\
+            "return a boolean indicating whether the terminal has sixel capability."
+        -refresh -type none -help\
+            "When supplied, will make a new call to punk::console::get_device_attributes,
+            rather than relying on a cached answer"
+        @values -min 0 -max 1
+        terminal -type list -minsize 2 -default {stdin stdout}
+    }
+    #review
+    variable device_attribute_cache
+    set device_attribute_cache [dict create]
+    proc can_sixel {args} {
+        set argd [punk::args::parse $args withid ::punk::sixel::can_sixel]
+        lassign [dict values $argd] leaders opts values received
+        set terminal [dict get $values terminal]
+
+        variable device_attribute_cache
+        if {[dict exists $received -refresh]} {
+            set attribs [punk::console::get_device_attributes $terminal]
+            dict set device_attribute_cache $terminal $attribs
+        } else {
+            if {[dict exists $device_attribute_cache $terminal]} {
+                set attribs [dict get $device_attribute_cache $terminal]
+            } else {
+                set attribs [punk::console::get_device_attributes $terminal]
+                dict set device_attribute_cache $terminal $attribs
+            }
+        }
+
+        set codes [split $attribs {;}]
+        if {"4" in $codes} {
+            return true
+        } else {
+            return false
+        }
+    }
+
     #*** !doctools
     #[list_end] [comment {--- end definitions namespace punk::sixel ---}]
 }

src/project_layouts/custom/_project/punk.project-0.1/src/bootsupport/modules/overtype-1.7.4.tm

@@ -3327,10 +3327,12 @@ tcl::namespace::eval overtype {
                         }
                         7DCS {
                             #ESC P
+                            #e.g sixel
                             #Device Control String  https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Controls-beginning-with-ESC:ESC-F.C74
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 2 end]]
                         }
                         8DCS {
+                            #e.g sixel
                             #8-bit Device Control String
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 1 end]]
                         }
@@ -4466,6 +4468,107 @@ tcl::namespace::eval overtype {
 
                         }
                         7DCS - 8DCS {
+                            #match 'DCS P1 ; P2 ; P3' (without spaces)
+                            # where Ps1,P2,P3 are all optional and P1,P2 are single digit and P3 can *technically* be any positive integer but is usually ignored (commonly set to zero)
+                            # Our regexp isn't precise as we will validate number of params and values after matching - but we will assume P3 should be small (review for micrometres - could be 4 digits? more?)
+                            # (limit to 10 chars to avoid insane values?)
+                            #https://github.com/hackerb9/vt340test/blob/main/physicalsixels.md
+                            # P1P2P3q - "Protocol Selector"
+                            #    P1 - Pixel Aspect Ratio (Vertical:Horizontal)
+                            #    P2 - background control
+                            #    P3 - horizontal grid size (default units decipoints 1/720 inch - but theoretically controlled by ANSI SSU sequence)
+                            # P1P2P3 commonly omitted - with subsequent <DQ>P4;P5;P6;P7 "Raster Attributes (DECGRA)" being used for:
+                            # Aspect Ratio (P4,P5)
+                            set sixelstart [tcl::string::range $codenorm 4 13]
+                            set sixelmatch [regexp -all -inline {^((?:[0-9]*;){0,2}(?:[0-9]*))q} $sixelstart]
+                            if {[llength $sixelmatch] == 2} {
+                                #sixel
+                                #note sixel data can have newlines before ST
+                                set sixelparams [lindex $sixelmatch 1]
+                                set params [split $sixelparams {;}]
+                                set badsixelparams 0
+                                if {[llength $params] > 3} {
+                                    set badsixelparams 1
+                                }
+                                lassign $params P1 P2 P3
+                                if {[string length $P1] > 1 || [string length $P2] > 1 || [string length $P3] > 3} {
+                                    set badsixelparams 1
+                                }
+                                if {$badsixelparams} {
+                                    puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but bad params. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                } else {
+                                    #todo - move to punk::sixel library
+
+                                    #P1 - Pixel Aspect Ratio
+                                    # round(10/P1):1 if 2<= P1 <= 9) 2:1 otherwise
+                                    # omitted 2:1 (default)
+                                    # 0,1     2:1
+                                    # 2       5:1
+                                    # 3,4     3:1
+                                    # 5,6     2:1
+                                    # 7,8,9   1:1
+                                    switch -- $P1 {
+                                        "" - 0 - 1 {
+                                            #omitted (default)
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        2 {
+                                            set sixel_pixel_aspect "5:1"
+                                        }
+                                        3 - 4 {
+                                            set sixel_pixel_aspect "3:1"
+                                        }
+                                        5 - 6 {
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        7 - 8 - 9 {
+                                            set sixel_pixel_aspect "1:1"
+                                        }
+                                        default {
+                                            set sixel_pixel_aspect "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P1 (pixel aspect ratio). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+                                    #P2 - background colour
+                                    # 0,2 (default)   pixel positions specified as 0 are set to current bg colour
+                                    # 1               pixel positions specified as 0 remain at current colour
+                                    switch -- $P2 {
+                                        "" - 0 - 2 {
+                                            set sixel_background "current_background"
+                                        }
+                                        1 {
+                                            set sixel_background "transparent"
+                                        }
+                                        default {
+                                            set sixel_background "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P2 (background control). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+
+                                    #P3 horizontal grid size - ignored on VT300 - commonly set to zero
+
+                                    # ECMA-48 SSU (ESC Ps <sp> I)
+                                    #  0 - CHARACTER
+                                    #  1 - MILLIMETRE
+                                    #  2 - COMPUTER DECIPOINT 0.03528mm 1/720 of 25.4mm)
+                                    #  3 - DECIDIDOT 0.03759mm (10/266mm)
+                                    #  4 - MIL 0.0254mm (1/1000 of 25.4mm)
+                                    #  5 - BASIC MEASURING UNIT (BMU) 0.02117mm (1/1200 of 25.4mm)
+                                    #  6 - MICROMETRE 0.001mm
+                                    #  7 - PIXEL - the smallest increment that can be specified in a device
+                                    #  8 - DECIPOINT - 0.03514mm (35/996mm)
+                                    set sixel_horizontal_grid $P3
+                                    set sixel_ssu "decipoint" ;#todo?
+
+                                    #todo - look for and  parse DECGRA introduced by double quote
+                                    puts stderr "overtype::renderline SIXEL aspect: $sixel_pixel_aspect bg: $sixel_background hgrid: $sixel_horizontal_grid. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+
+
+                                    #todo
+                                }
+                            } else {
                                 puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING command UNIMPLEMENTED. code [ansistring VIEW -lf 1 -vt 1 -nul 1 $code]"
                                 #ST (string terminator) \x9c or \x1b\\
                                 if {[tcl::string::index $codenorm end] eq "\x9c"} {
@@ -4473,7 +4576,7 @@ tcl::namespace::eval overtype {
                                 } else {
                                     set code_content [tcl::string::range $codenorm 4 end-2] ;#ST is \x1b\\
                                 }
-
+                            }
                         }
                         7OSC - 8OSC {
                             # OSCs are terminated with ST of either \007 or \x1b\\ - we allow either whether code was 7 or 8 bit

src/project_layouts/custom/_project/punk.project-0.1/src/bootsupport/modules/punk/ansi-0.1.1.tm

@@ -5039,6 +5039,10 @@ Brightblack 100   Brightred 101   Brightgreen 102   Brightyellow 103   Brightblu
     #    mouse_urxvt             1015\
     #    mouse_sgr_pixel               1016\
     #]
+    #
+    # some more ansi mode/sequence info:
+    #https://pkg.go.dev/github.com/charmbracelet/x/ansi
+
     variable decmode_data {
         1   {
                 {origin DEC description "DECCKM - Cursor Keys Mode" names {DECCKM cursor_keys}}
@@ -5059,6 +5063,9 @@ In VT52 mode - use \x1b< to exit.
         5   {
                 {origin DEC description "DECSCNM - Screen Mode (light or dark screen)" names {DECSNM lightmode}}
         }
+        6   {
+                {origin DEC description "DECOM - Origin Mode (whether cursor is restricted to within page margins)" names {DECOM}}
+        }
         7   {
                 {origin DEC description "DECAWM - Auto Wrap Mode" names {DECAWM line_wrap}}
         }
@@ -5090,7 +5097,13 @@ be as if this was off - ie lone CR.
                 {origin DEC   description "DECGRPM - Graphics Rotated Print Mode (obsolete?)" names {DECGRPM}}
         }
         66  {
-                {origin DEC description "DECNKM - Numeric Keypad Mode" names {DECNKM}}
+                {origin DEC description "DECNKM - Numeric Keypad Mode" see "https://vt100.net/docs/vt510-rm/DECNKM.html" names {DECNKM}}
+        }
+        67  {
+                {origin DEC description "DECBKM - Backarrow Key Mode" see "https://vt100.net/docs/vt510-rm/DECBKM.html" names {DECBKM}}
+        }
+        69  {
+                {origin DEC description "DECLRMM - Left Right Margin Mode" see "https://vt100.net/docs/vt510-rm/DECLRMM.html" names {DECLRMM}}
         }
         1000 {
                 {origin "xterm" description  "VT200 compatibility mouse" names {SET_VT200_MOUSE} note {

src/project_layouts/custom/_project/punk.project-0.1/src/bootsupport/modules/punk/console-0.1.1.tm

@@ -570,6 +570,14 @@ namespace eval punk::console {
         puts -nonewline stdout \x1b\[?1006l
         flush stdout
     }
+    proc enable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000h\x1b\[?1003h\x1b\[?1016h
+        flush stdout
+    }
+    proc disable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000l\x1b\[?1003l\x1b\[?1016l
+        flush stdout
+    }
     proc enable_bracketed_paste {} {
         puts -nonewline stdout \x1b\[?2004h
     }
@@ -1762,6 +1770,158 @@ namespace eval punk::console {
         puts -nonewline "\x1b\[?${m}l"
     }
 
+    variable has_mode_cache
+    set has_mode_cache [dict create]
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::has_mode
+        @cmd    -name   punk::console::has_mode\
+            -summary\
+            {Check if console supports DEC mode}\
+            -help\
+            {Check if console supports DEC mode by emitting query to the console using
+            the sequence:
+              ESC [ ? <n> $ p
+            Where <n> is an integer identifier.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        -refresh -type none
+        @values -min 1 -max 1
+        mode -type {int|string} -help\
+            "integer for DEC mode, or name as in the dict:
+            ::punk::ansi::decmode_names"
+    }]
+    proc has_mode {args} {
+        set argd [punk::args::parse $args withid ::punk::console::has_mode]
+        lassign [dict values $argd] leaders opts values received
+        set console [dict get $opts -console]
+        set num_or_name [dict get $values mode]
+        if {[dict exists $received -refresh]} {
+            set do_refresh 1
+        } else {
+            set do_refresh 0
+        }
+
+        if {[string is integer -strict $num_or_name]} {
+            set m $num_or_name
+        } else {
+            upvar ::punk::ansi::decmode_names decmode_names
+            if {[dict exists $decmode_names $num_or_name]} {
+                set m [dict get $decmode_names $num_or_name]
+            } else {
+                error "punk::console::get_mode unrecognised mode '$num_or_name'. Known mode names: [dict keys $decmode_names]"
+            }
+        }
+        variable has_mode_cache
+        if {$do_refresh} {
+            if {[dict exists $has_mode_cache $console $m]} {
+                dict unset has_mode_cache $console $m
+            }
+        }
+
+        if {![dict exists $has_mode_cache $console $m]} {
+            set capturingregex [string map [list %MODE% $m] {(.*)(\x1b\[\?%MODE%;([0-9]+)\$y)$}] ;#must capture prefix,entire-response,response-payload
+            set request "\x1b\[?$m\$p"
+            set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+            set has_mode [expr {$payload != 0}]
+            dict set has_mode_cache $console $m $has_mode
+        } else {
+            set has_mode [dict get $has_mode_cache $console $m]
+        }
+        return $has_mode
+    }
+
+    set DECRQSS_DATA {
+        "Select Active Status Display"      DECSASD     "$\}"
+        "Select Attribute Change Extent"    DECSACE     "*x"
+        "Set Character Attribute"           DECSCA      "\"q"
+        "Set Conformance Level"             DECSCL      "\"p"
+        "Set Columns Per Page"              DECSCPP     "\$|"
+        "Set Lines Per Page"                DECSLPP     "t"
+        "Set Number of Lines per Screen"    DECSNLS     "*|"
+        "Set Status Line Type"              DECSSDT     "$~"
+        "Set Left and Right Margins"        DECSLRM     "s"
+        "Set Top and Bottom Margins"        DECSTBM     "r"
+        "Set Graphic Rendition"             SGR         "m"
+        "Select Set-Up Language"            DECSSL      "p"
+        "Select Printer Type"               DECSPRTT    "\$s"
+        "Select Refresh Rate"               DECSRFR     "\"t"
+        "Select Digital Printed Data Type"  DECSDPT     "(p"
+        "Select ProPrinter Character Set"   DECSPPCS    "*p"
+        "Select Communication Speed"        DECSCS      "*r"
+        "Select Communication Port"         DECSCP      "*u"
+        "Set Scroll Speed"                  DECSSCLS    " p"
+        "Set Cursor Style"                  DECSCUSR    " q"
+        "Set Key Click Volume"              DECSKCV     " r"
+        "Set Warning Bell Volume"           DECSWBV     " t"
+        "Set Margin Bell Volume"            DECSMBV     " u"
+        "Set Lock Key Style"                DECSLCK     " v"
+        "Select Flow Control Type"          DECSFC      "*s"
+        "Select Disconnect Delay Time"      DECSDDT     "\$q"
+        "Set Transmit Rate Limit"           DECSTRL     "u"
+        "Set Port Parameter"                DECSPP      "\+w"
+    }
+    set DECRQSS_DICT [dict create]
+    foreach {desc name str} $DECRQSS_DATA {
+        dict set DECRQSS_DICT $name $str
+    }
+
+    #emit DECRQSS and get DECRPSS response
+    # ---------------------
+    #NOTE: https://vt100.net/docs/vt510-rm/DECRPSS.html
+    #response: DCS Ps $ r D...D ST
+    #Conflict between above doc saying Ps of 0 indicates a valid request and 1 indicates invalid - and the behaviour of windows terminal, wezterm and the reported xterm behaviour
+    # shown at: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    #REVIEW
+    # ---------------------
+    #Note also on Freebsd xterm we seem to getresponse ': 1 $ r D...D ST'
+    #(no leading DCS) - this 
+
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::request_dec_setting
+        @cmd    -name   punk::console::request_dec_setting\
+            -summary\
+            {Perform DECRQSS query to get DECRPSS response}\
+            -help\
+            {DECRQSS query for DEC Selection or Setting.
+            Return payload from console's DECRPSS response.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        @values -min 1 -max 1
+        name -type string
+    }]
+    proc request_dec_setting {args} {
+        set argd [punk::args::parse $args withid ::punk::console::request_dec_setting]
+        lassign [dict values $argd] leaders opts values
+        set console [dict get $opts -console]
+        set name [dict get $values name]
+
+        variable DECRQSS_DICT
+        if {![dict exists $DECRQSS_DICT $name]} {
+            error "request_dec_setting unrecognised name $name. Known values: [dict keys $DECRQSS_DICT]"
+        }
+        set str [dict get $DECRQSS_DICT $name]
+        set re_str [string map [list * \\* \$ \\\$ + \\+ ( \\(] $str] ;#regex escaped
+        #review {[0-9;:]} - too restrictive? - what values can be returned? alnum? - we perhaps at least need to exclude ESC so we don't overmatch
+        set capturingregex [string map [list %s% $re_str] {(.*)(\x1bP([0-1]\$r[0-9;:]*)(?:%s%){0,1}\x1b\\)$}] ;#must capture prefix,entire-response,response-payload
+        #todo - handle xterm : [0-1] $ r D...D ST
+        set request "\x1bP\$q${str}\x1b\\"
+        set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+        set c1 [string index $payload 0]
+        switch -- $c1 {
+            0 {
+                error "request_dec_setting - terminal doesn't recognise request '[punk::ansi::ansistring VIEW $request]' as valid"
+            }
+            1 {}
+            default {
+                #shouldn't get here
+                error "request_dec_setting - unrecognised response to request '[punk::ansi::ansistring VIEW $request]'. payload: [punk::ansi::ansistring VIEW $payload]"
+            }
+        }
+        #strip leading 1$r
+        return [string range $payload 3 end]
+    }
 
     #terminals lie. This should be a reasonable (albeit relatively slow) test of actual width - but some terminals seem to miscalculate.
     #todo - a visual interactive test/questionnaire to ask user if things are lining up or if the terminal is telling fibs about cursor position.

src/project_layouts/custom/_project/punk.shell-0.1/src/bootsupport/modules/overtype-1.7.4.tm

@@ -3327,10 +3327,12 @@ tcl::namespace::eval overtype {
                         }
                         7DCS {
                             #ESC P
+                            #e.g sixel
                             #Device Control String  https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Controls-beginning-with-ESC:ESC-F.C74
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 2 end]]
                         }
                         8DCS {
+                            #e.g sixel
                             #8-bit Device Control String
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 1 end]]
                         }
@@ -4466,6 +4468,107 @@ tcl::namespace::eval overtype {
 
                         }
                         7DCS - 8DCS {
+                            #match 'DCS P1 ; P2 ; P3' (without spaces)
+                            # where Ps1,P2,P3 are all optional and P1,P2 are single digit and P3 can *technically* be any positive integer but is usually ignored (commonly set to zero)
+                            # Our regexp isn't precise as we will validate number of params and values after matching - but we will assume P3 should be small (review for micrometres - could be 4 digits? more?)
+                            # (limit to 10 chars to avoid insane values?)
+                            #https://github.com/hackerb9/vt340test/blob/main/physicalsixels.md
+                            # P1P2P3q - "Protocol Selector"
+                            #    P1 - Pixel Aspect Ratio (Vertical:Horizontal)
+                            #    P2 - background control
+                            #    P3 - horizontal grid size (default units decipoints 1/720 inch - but theoretically controlled by ANSI SSU sequence)
+                            # P1P2P3 commonly omitted - with subsequent <DQ>P4;P5;P6;P7 "Raster Attributes (DECGRA)" being used for:
+                            # Aspect Ratio (P4,P5)
+                            set sixelstart [tcl::string::range $codenorm 4 13]
+                            set sixelmatch [regexp -all -inline {^((?:[0-9]*;){0,2}(?:[0-9]*))q} $sixelstart]
+                            if {[llength $sixelmatch] == 2} {
+                                #sixel
+                                #note sixel data can have newlines before ST
+                                set sixelparams [lindex $sixelmatch 1]
+                                set params [split $sixelparams {;}]
+                                set badsixelparams 0
+                                if {[llength $params] > 3} {
+                                    set badsixelparams 1
+                                }
+                                lassign $params P1 P2 P3
+                                if {[string length $P1] > 1 || [string length $P2] > 1 || [string length $P3] > 3} {
+                                    set badsixelparams 1
+                                }
+                                if {$badsixelparams} {
+                                    puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but bad params. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                } else {
+                                    #todo - move to punk::sixel library
+
+                                    #P1 - Pixel Aspect Ratio
+                                    # round(10/P1):1 if 2<= P1 <= 9) 2:1 otherwise
+                                    # omitted 2:1 (default)
+                                    # 0,1     2:1
+                                    # 2       5:1
+                                    # 3,4     3:1
+                                    # 5,6     2:1
+                                    # 7,8,9   1:1
+                                    switch -- $P1 {
+                                        "" - 0 - 1 {
+                                            #omitted (default)
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        2 {
+                                            set sixel_pixel_aspect "5:1"
+                                        }
+                                        3 - 4 {
+                                            set sixel_pixel_aspect "3:1"
+                                        }
+                                        5 - 6 {
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        7 - 8 - 9 {
+                                            set sixel_pixel_aspect "1:1"
+                                        }
+                                        default {
+                                            set sixel_pixel_aspect "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P1 (pixel aspect ratio). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+                                    #P2 - background colour
+                                    # 0,2 (default)   pixel positions specified as 0 are set to current bg colour
+                                    # 1               pixel positions specified as 0 remain at current colour
+                                    switch -- $P2 {
+                                        "" - 0 - 2 {
+                                            set sixel_background "current_background"
+                                        }
+                                        1 {
+                                            set sixel_background "transparent"
+                                        }
+                                        default {
+                                            set sixel_background "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P2 (background control). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+
+                                    #P3 horizontal grid size - ignored on VT300 - commonly set to zero
+
+                                    # ECMA-48 SSU (ESC Ps <sp> I)
+                                    #  0 - CHARACTER
+                                    #  1 - MILLIMETRE
+                                    #  2 - COMPUTER DECIPOINT 0.03528mm 1/720 of 25.4mm)
+                                    #  3 - DECIDIDOT 0.03759mm (10/266mm)
+                                    #  4 - MIL 0.0254mm (1/1000 of 25.4mm)
+                                    #  5 - BASIC MEASURING UNIT (BMU) 0.02117mm (1/1200 of 25.4mm)
+                                    #  6 - MICROMETRE 0.001mm
+                                    #  7 - PIXEL - the smallest increment that can be specified in a device
+                                    #  8 - DECIPOINT - 0.03514mm (35/996mm)
+                                    set sixel_horizontal_grid $P3
+                                    set sixel_ssu "decipoint" ;#todo?
+
+                                    #todo - look for and  parse DECGRA introduced by double quote
+                                    puts stderr "overtype::renderline SIXEL aspect: $sixel_pixel_aspect bg: $sixel_background hgrid: $sixel_horizontal_grid. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+
+
+                                    #todo
+                                }
+                            } else {
                                 puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING command UNIMPLEMENTED. code [ansistring VIEW -lf 1 -vt 1 -nul 1 $code]"
                                 #ST (string terminator) \x9c or \x1b\\
                                 if {[tcl::string::index $codenorm end] eq "\x9c"} {
@@ -4473,7 +4576,7 @@ tcl::namespace::eval overtype {
                                 } else {
                                     set code_content [tcl::string::range $codenorm 4 end-2] ;#ST is \x1b\\
                                 }
-
+                            }
                         }
                         7OSC - 8OSC {
                             # OSCs are terminated with ST of either \007 or \x1b\\ - we allow either whether code was 7 or 8 bit

src/project_layouts/custom/_project/punk.shell-0.1/src/bootsupport/modules/punk/ansi-0.1.1.tm

@@ -5039,6 +5039,10 @@ Brightblack 100   Brightred 101   Brightgreen 102   Brightyellow 103   Brightblu
     #    mouse_urxvt             1015\
     #    mouse_sgr_pixel               1016\
     #]
+    #
+    # some more ansi mode/sequence info:
+    #https://pkg.go.dev/github.com/charmbracelet/x/ansi
+
     variable decmode_data {
         1   {
                 {origin DEC description "DECCKM - Cursor Keys Mode" names {DECCKM cursor_keys}}
@@ -5059,6 +5063,9 @@ In VT52 mode - use \x1b< to exit.
         5   {
                 {origin DEC description "DECSCNM - Screen Mode (light or dark screen)" names {DECSNM lightmode}}
         }
+        6   {
+                {origin DEC description "DECOM - Origin Mode (whether cursor is restricted to within page margins)" names {DECOM}}
+        }
         7   {
                 {origin DEC description "DECAWM - Auto Wrap Mode" names {DECAWM line_wrap}}
         }
@@ -5090,7 +5097,13 @@ be as if this was off - ie lone CR.
                 {origin DEC   description "DECGRPM - Graphics Rotated Print Mode (obsolete?)" names {DECGRPM}}
         }
         66  {
-                {origin DEC description "DECNKM - Numeric Keypad Mode" names {DECNKM}}
+                {origin DEC description "DECNKM - Numeric Keypad Mode" see "https://vt100.net/docs/vt510-rm/DECNKM.html" names {DECNKM}}
+        }
+        67  {
+                {origin DEC description "DECBKM - Backarrow Key Mode" see "https://vt100.net/docs/vt510-rm/DECBKM.html" names {DECBKM}}
+        }
+        69  {
+                {origin DEC description "DECLRMM - Left Right Margin Mode" see "https://vt100.net/docs/vt510-rm/DECLRMM.html" names {DECLRMM}}
         }
         1000 {
                 {origin "xterm" description  "VT200 compatibility mouse" names {SET_VT200_MOUSE} note {

src/project_layouts/custom/_project/punk.shell-0.1/src/bootsupport/modules/punk/console-0.1.1.tm

@@ -570,6 +570,14 @@ namespace eval punk::console {
         puts -nonewline stdout \x1b\[?1006l
         flush stdout
     }
+    proc enable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000h\x1b\[?1003h\x1b\[?1016h
+        flush stdout
+    }
+    proc disable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000l\x1b\[?1003l\x1b\[?1016l
+        flush stdout
+    }
     proc enable_bracketed_paste {} {
         puts -nonewline stdout \x1b\[?2004h
     }
@@ -1762,6 +1770,158 @@ namespace eval punk::console {
         puts -nonewline "\x1b\[?${m}l"
     }
 
+    variable has_mode_cache
+    set has_mode_cache [dict create]
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::has_mode
+        @cmd    -name   punk::console::has_mode\
+            -summary\
+            {Check if console supports DEC mode}\
+            -help\
+            {Check if console supports DEC mode by emitting query to the console using
+            the sequence:
+              ESC [ ? <n> $ p
+            Where <n> is an integer identifier.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        -refresh -type none
+        @values -min 1 -max 1
+        mode -type {int|string} -help\
+            "integer for DEC mode, or name as in the dict:
+            ::punk::ansi::decmode_names"
+    }]
+    proc has_mode {args} {
+        set argd [punk::args::parse $args withid ::punk::console::has_mode]
+        lassign [dict values $argd] leaders opts values received
+        set console [dict get $opts -console]
+        set num_or_name [dict get $values mode]
+        if {[dict exists $received -refresh]} {
+            set do_refresh 1
+        } else {
+            set do_refresh 0
+        }
+
+        if {[string is integer -strict $num_or_name]} {
+            set m $num_or_name
+        } else {
+            upvar ::punk::ansi::decmode_names decmode_names
+            if {[dict exists $decmode_names $num_or_name]} {
+                set m [dict get $decmode_names $num_or_name]
+            } else {
+                error "punk::console::get_mode unrecognised mode '$num_or_name'. Known mode names: [dict keys $decmode_names]"
+            }
+        }
+        variable has_mode_cache
+        if {$do_refresh} {
+            if {[dict exists $has_mode_cache $console $m]} {
+                dict unset has_mode_cache $console $m
+            }
+        }
+
+        if {![dict exists $has_mode_cache $console $m]} {
+            set capturingregex [string map [list %MODE% $m] {(.*)(\x1b\[\?%MODE%;([0-9]+)\$y)$}] ;#must capture prefix,entire-response,response-payload
+            set request "\x1b\[?$m\$p"
+            set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+            set has_mode [expr {$payload != 0}]
+            dict set has_mode_cache $console $m $has_mode
+        } else {
+            set has_mode [dict get $has_mode_cache $console $m]
+        }
+        return $has_mode
+    }
+
+    set DECRQSS_DATA {
+        "Select Active Status Display"      DECSASD     "$\}"
+        "Select Attribute Change Extent"    DECSACE     "*x"
+        "Set Character Attribute"           DECSCA      "\"q"
+        "Set Conformance Level"             DECSCL      "\"p"
+        "Set Columns Per Page"              DECSCPP     "\$|"
+        "Set Lines Per Page"                DECSLPP     "t"
+        "Set Number of Lines per Screen"    DECSNLS     "*|"
+        "Set Status Line Type"              DECSSDT     "$~"
+        "Set Left and Right Margins"        DECSLRM     "s"
+        "Set Top and Bottom Margins"        DECSTBM     "r"
+        "Set Graphic Rendition"             SGR         "m"
+        "Select Set-Up Language"            DECSSL      "p"
+        "Select Printer Type"               DECSPRTT    "\$s"
+        "Select Refresh Rate"               DECSRFR     "\"t"
+        "Select Digital Printed Data Type"  DECSDPT     "(p"
+        "Select ProPrinter Character Set"   DECSPPCS    "*p"
+        "Select Communication Speed"        DECSCS      "*r"
+        "Select Communication Port"         DECSCP      "*u"
+        "Set Scroll Speed"                  DECSSCLS    " p"
+        "Set Cursor Style"                  DECSCUSR    " q"
+        "Set Key Click Volume"              DECSKCV     " r"
+        "Set Warning Bell Volume"           DECSWBV     " t"
+        "Set Margin Bell Volume"            DECSMBV     " u"
+        "Set Lock Key Style"                DECSLCK     " v"
+        "Select Flow Control Type"          DECSFC      "*s"
+        "Select Disconnect Delay Time"      DECSDDT     "\$q"
+        "Set Transmit Rate Limit"           DECSTRL     "u"
+        "Set Port Parameter"                DECSPP      "\+w"
+    }
+    set DECRQSS_DICT [dict create]
+    foreach {desc name str} $DECRQSS_DATA {
+        dict set DECRQSS_DICT $name $str
+    }
+
+    #emit DECRQSS and get DECRPSS response
+    # ---------------------
+    #NOTE: https://vt100.net/docs/vt510-rm/DECRPSS.html
+    #response: DCS Ps $ r D...D ST
+    #Conflict between above doc saying Ps of 0 indicates a valid request and 1 indicates invalid - and the behaviour of windows terminal, wezterm and the reported xterm behaviour
+    # shown at: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    #REVIEW
+    # ---------------------
+    #Note also on Freebsd xterm we seem to getresponse ': 1 $ r D...D ST'
+    #(no leading DCS) - this 
+
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::request_dec_setting
+        @cmd    -name   punk::console::request_dec_setting\
+            -summary\
+            {Perform DECRQSS query to get DECRPSS response}\
+            -help\
+            {DECRQSS query for DEC Selection or Setting.
+            Return payload from console's DECRPSS response.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        @values -min 1 -max 1
+        name -type string
+    }]
+    proc request_dec_setting {args} {
+        set argd [punk::args::parse $args withid ::punk::console::request_dec_setting]
+        lassign [dict values $argd] leaders opts values
+        set console [dict get $opts -console]
+        set name [dict get $values name]
+
+        variable DECRQSS_DICT
+        if {![dict exists $DECRQSS_DICT $name]} {
+            error "request_dec_setting unrecognised name $name. Known values: [dict keys $DECRQSS_DICT]"
+        }
+        set str [dict get $DECRQSS_DICT $name]
+        set re_str [string map [list * \\* \$ \\\$ + \\+ ( \\(] $str] ;#regex escaped
+        #review {[0-9;:]} - too restrictive? - what values can be returned? alnum? - we perhaps at least need to exclude ESC so we don't overmatch
+        set capturingregex [string map [list %s% $re_str] {(.*)(\x1bP([0-1]\$r[0-9;:]*)(?:%s%){0,1}\x1b\\)$}] ;#must capture prefix,entire-response,response-payload
+        #todo - handle xterm : [0-1] $ r D...D ST
+        set request "\x1bP\$q${str}\x1b\\"
+        set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+        set c1 [string index $payload 0]
+        switch -- $c1 {
+            0 {
+                error "request_dec_setting - terminal doesn't recognise request '[punk::ansi::ansistring VIEW $request]' as valid"
+            }
+            1 {}
+            default {
+                #shouldn't get here
+                error "request_dec_setting - unrecognised response to request '[punk::ansi::ansistring VIEW $request]'. payload: [punk::ansi::ansistring VIEW $payload]"
+            }
+        }
+        #strip leading 1$r
+        return [string range $payload 3 end]
+    }
 
     #terminals lie. This should be a reasonable (albeit relatively slow) test of actual width - but some terminals seem to miscalculate.
     #todo - a visual interactive test/questionnaire to ask user if things are lining up or if the terminal is telling fibs about cursor position.

src/vfs/_vfscommon.vfs/modules/overtype-1.7.4.tm

@@ -3327,10 +3327,12 @@ tcl::namespace::eval overtype {
                         }
                         7DCS {
                             #ESC P
+                            #e.g sixel
                             #Device Control String  https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Controls-beginning-with-ESC:ESC-F.C74
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 2 end]]
                         }
                         8DCS {
+                            #e.g sixel
                             #8-bit Device Control String
                             set codenorm [tcl::string::cat $leadernorm [tcl::string::range $code 1 end]]
                         }
@@ -4466,6 +4468,107 @@ tcl::namespace::eval overtype {
 
                         }
                         7DCS - 8DCS {
+                            #match 'DCS P1 ; P2 ; P3' (without spaces)
+                            # where Ps1,P2,P3 are all optional and P1,P2 are single digit and P3 can *technically* be any positive integer but is usually ignored (commonly set to zero)
+                            # Our regexp isn't precise as we will validate number of params and values after matching - but we will assume P3 should be small (review for micrometres - could be 4 digits? more?)
+                            # (limit to 10 chars to avoid insane values?)
+                            #https://github.com/hackerb9/vt340test/blob/main/physicalsixels.md
+                            # P1P2P3q - "Protocol Selector"
+                            #    P1 - Pixel Aspect Ratio (Vertical:Horizontal)
+                            #    P2 - background control
+                            #    P3 - horizontal grid size (default units decipoints 1/720 inch - but theoretically controlled by ANSI SSU sequence)
+                            # P1P2P3 commonly omitted - with subsequent <DQ>P4;P5;P6;P7 "Raster Attributes (DECGRA)" being used for:
+                            # Aspect Ratio (P4,P5)
+                            set sixelstart [tcl::string::range $codenorm 4 13]
+                            set sixelmatch [regexp -all -inline {^((?:[0-9]*;){0,2}(?:[0-9]*))q} $sixelstart]
+                            if {[llength $sixelmatch] == 2} {
+                                #sixel
+                                #note sixel data can have newlines before ST
+                                set sixelparams [lindex $sixelmatch 1]
+                                set params [split $sixelparams {;}]
+                                set badsixelparams 0
+                                if {[llength $params] > 3} {
+                                    set badsixelparams 1
+                                }
+                                lassign $params P1 P2 P3
+                                if {[string length $P1] > 1 || [string length $P2] > 1 || [string length $P3] > 3} {
+                                    set badsixelparams 1
+                                }
+                                if {$badsixelparams} {
+                                    puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but bad params. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                } else {
+                                    #todo - move to punk::sixel library
+
+                                    #P1 - Pixel Aspect Ratio
+                                    # round(10/P1):1 if 2<= P1 <= 9) 2:1 otherwise
+                                    # omitted 2:1 (default)
+                                    # 0,1     2:1
+                                    # 2       5:1
+                                    # 3,4     3:1
+                                    # 5,6     2:1
+                                    # 7,8,9   1:1
+                                    switch -- $P1 {
+                                        "" - 0 - 1 {
+                                            #omitted (default)
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        2 {
+                                            set sixel_pixel_aspect "5:1"
+                                        }
+                                        3 - 4 {
+                                            set sixel_pixel_aspect "3:1"
+                                        }
+                                        5 - 6 {
+                                            set sixel_pixel_aspect "2:1"
+                                        }
+                                        7 - 8 - 9 {
+                                            set sixel_pixel_aspect "1:1"
+                                        }
+                                        default {
+                                            set sixel_pixel_aspect "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P1 (pixel aspect ratio). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+                                    #P2 - background colour
+                                    # 0,2 (default)   pixel positions specified as 0 are set to current bg colour
+                                    # 1               pixel positions specified as 0 remain at current colour
+                                    switch -- $P2 {
+                                        "" - 0 - 2 {
+                                            set sixel_background "current_background"
+                                        }
+                                        1 {
+                                            set sixel_background "transparent"
+                                        }
+                                        default {
+                                            set sixel_background "invalid"
+                                            puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING looks like sixel, but unrecognised P2 (background control). sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+                                        }
+                                    }
+
+
+                                    #P3 horizontal grid size - ignored on VT300 - commonly set to zero
+
+                                    # ECMA-48 SSU (ESC Ps <sp> I)
+                                    #  0 - CHARACTER
+                                    #  1 - MILLIMETRE
+                                    #  2 - COMPUTER DECIPOINT 0.03528mm 1/720 of 25.4mm)
+                                    #  3 - DECIDIDOT 0.03759mm (10/266mm)
+                                    #  4 - MIL 0.0254mm (1/1000 of 25.4mm)
+                                    #  5 - BASIC MEASURING UNIT (BMU) 0.02117mm (1/1200 of 25.4mm)
+                                    #  6 - MICROMETRE 0.001mm
+                                    #  7 - PIXEL - the smallest increment that can be specified in a device
+                                    #  8 - DECIPOINT - 0.03514mm (35/996mm)
+                                    set sixel_horizontal_grid $P3
+                                    set sixel_ssu "decipoint" ;#todo?
+
+                                    #todo - look for and  parse DECGRA introduced by double quote
+                                    puts stderr "overtype::renderline SIXEL aspect: $sixel_pixel_aspect bg: $sixel_background hgrid: $sixel_horizontal_grid. sixelstart [ansistring VIEW -lf 1 -vt 1 -nul 1 $sixelstart]"
+
+
+                                    #todo
+                                }
+                            } else {
                                 puts stderr "overtype::renderline DCS - DEVICE CONTROL STRING command UNIMPLEMENTED. code [ansistring VIEW -lf 1 -vt 1 -nul 1 $code]"
                                 #ST (string terminator) \x9c or \x1b\\
                                 if {[tcl::string::index $codenorm end] eq "\x9c"} {
@@ -4473,7 +4576,7 @@ tcl::namespace::eval overtype {
                                 } else {
                                     set code_content [tcl::string::range $codenorm 4 end-2] ;#ST is \x1b\\
                                 }
-
+                            }
                         }
                         7OSC - 8OSC {
                             # OSCs are terminated with ST of either \007 or \x1b\\ - we allow either whether code was 7 or 8 bit

src/vfs/_vfscommon.vfs/modules/punk/ansi-0.1.1.tm

@@ -5039,6 +5039,10 @@ Brightblack 100   Brightred 101   Brightgreen 102   Brightyellow 103   Brightblu
     #    mouse_urxvt             1015\
     #    mouse_sgr_pixel               1016\
     #]
+    #
+    # some more ansi mode/sequence info:
+    #https://pkg.go.dev/github.com/charmbracelet/x/ansi
+
     variable decmode_data {
         1   {
                 {origin DEC description "DECCKM - Cursor Keys Mode" names {DECCKM cursor_keys}}
@@ -5059,6 +5063,9 @@ In VT52 mode - use \x1b< to exit.
         5   {
                 {origin DEC description "DECSCNM - Screen Mode (light or dark screen)" names {DECSNM lightmode}}
         }
+        6   {
+                {origin DEC description "DECOM - Origin Mode (whether cursor is restricted to within page margins)" names {DECOM}}
+        }
         7   {
                 {origin DEC description "DECAWM - Auto Wrap Mode" names {DECAWM line_wrap}}
         }
@@ -5090,7 +5097,13 @@ be as if this was off - ie lone CR.
                 {origin DEC   description "DECGRPM - Graphics Rotated Print Mode (obsolete?)" names {DECGRPM}}
         }
         66  {
-                {origin DEC description "DECNKM - Numeric Keypad Mode" names {DECNKM}}
+                {origin DEC description "DECNKM - Numeric Keypad Mode" see "https://vt100.net/docs/vt510-rm/DECNKM.html" names {DECNKM}}
+        }
+        67  {
+                {origin DEC description "DECBKM - Backarrow Key Mode" see "https://vt100.net/docs/vt510-rm/DECBKM.html" names {DECBKM}}
+        }
+        69  {
+                {origin DEC description "DECLRMM - Left Right Margin Mode" see "https://vt100.net/docs/vt510-rm/DECLRMM.html" names {DECLRMM}}
         }
         1000 {
                 {origin "xterm" description  "VT200 compatibility mouse" names {SET_VT200_MOUSE} note {

src/vfs/_vfscommon.vfs/modules/punk/console-0.1.1.tm

@@ -570,6 +570,14 @@ namespace eval punk::console {
         puts -nonewline stdout \x1b\[?1006l
         flush stdout
     }
+    proc enable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000h\x1b\[?1003h\x1b\[?1016h
+        flush stdout
+    }
+    proc disable_mouse_sgr {} {
+        puts -nonewline stdout \x1b\[?1000l\x1b\[?1003l\x1b\[?1016l
+        flush stdout
+    }
     proc enable_bracketed_paste {} {
         puts -nonewline stdout \x1b\[?2004h
     }
@@ -1762,6 +1770,158 @@ namespace eval punk::console {
         puts -nonewline "\x1b\[?${m}l"
     }
 
+    variable has_mode_cache
+    set has_mode_cache [dict create]
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::has_mode
+        @cmd    -name   punk::console::has_mode\
+            -summary\
+            {Check if console supports DEC mode}\
+            -help\
+            {Check if console supports DEC mode by emitting query to the console using
+            the sequence:
+              ESC [ ? <n> $ p
+            Where <n> is an integer identifier.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        -refresh -type none
+        @values -min 1 -max 1
+        mode -type {int|string} -help\
+            "integer for DEC mode, or name as in the dict:
+            ::punk::ansi::decmode_names"
+    }]
+    proc has_mode {args} {
+        set argd [punk::args::parse $args withid ::punk::console::has_mode]
+        lassign [dict values $argd] leaders opts values received
+        set console [dict get $opts -console]
+        set num_or_name [dict get $values mode]
+        if {[dict exists $received -refresh]} {
+            set do_refresh 1
+        } else {
+            set do_refresh 0
+        }
+
+        if {[string is integer -strict $num_or_name]} {
+            set m $num_or_name
+        } else {
+            upvar ::punk::ansi::decmode_names decmode_names
+            if {[dict exists $decmode_names $num_or_name]} {
+                set m [dict get $decmode_names $num_or_name]
+            } else {
+                error "punk::console::get_mode unrecognised mode '$num_or_name'. Known mode names: [dict keys $decmode_names]"
+            }
+        }
+        variable has_mode_cache
+        if {$do_refresh} {
+            if {[dict exists $has_mode_cache $console $m]} {
+                dict unset has_mode_cache $console $m
+            }
+        }
+
+        if {![dict exists $has_mode_cache $console $m]} {
+            set capturingregex [string map [list %MODE% $m] {(.*)(\x1b\[\?%MODE%;([0-9]+)\$y)$}] ;#must capture prefix,entire-response,response-payload
+            set request "\x1b\[?$m\$p"
+            set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+            set has_mode [expr {$payload != 0}]
+            dict set has_mode_cache $console $m $has_mode
+        } else {
+            set has_mode [dict get $has_mode_cache $console $m]
+        }
+        return $has_mode
+    }
+
+    set DECRQSS_DATA {
+        "Select Active Status Display"      DECSASD     "$\}"
+        "Select Attribute Change Extent"    DECSACE     "*x"
+        "Set Character Attribute"           DECSCA      "\"q"
+        "Set Conformance Level"             DECSCL      "\"p"
+        "Set Columns Per Page"              DECSCPP     "\$|"
+        "Set Lines Per Page"                DECSLPP     "t"
+        "Set Number of Lines per Screen"    DECSNLS     "*|"
+        "Set Status Line Type"              DECSSDT     "$~"
+        "Set Left and Right Margins"        DECSLRM     "s"
+        "Set Top and Bottom Margins"        DECSTBM     "r"
+        "Set Graphic Rendition"             SGR         "m"
+        "Select Set-Up Language"            DECSSL      "p"
+        "Select Printer Type"               DECSPRTT    "\$s"
+        "Select Refresh Rate"               DECSRFR     "\"t"
+        "Select Digital Printed Data Type"  DECSDPT     "(p"
+        "Select ProPrinter Character Set"   DECSPPCS    "*p"
+        "Select Communication Speed"        DECSCS      "*r"
+        "Select Communication Port"         DECSCP      "*u"
+        "Set Scroll Speed"                  DECSSCLS    " p"
+        "Set Cursor Style"                  DECSCUSR    " q"
+        "Set Key Click Volume"              DECSKCV     " r"
+        "Set Warning Bell Volume"           DECSWBV     " t"
+        "Set Margin Bell Volume"            DECSMBV     " u"
+        "Set Lock Key Style"                DECSLCK     " v"
+        "Select Flow Control Type"          DECSFC      "*s"
+        "Select Disconnect Delay Time"      DECSDDT     "\$q"
+        "Set Transmit Rate Limit"           DECSTRL     "u"
+        "Set Port Parameter"                DECSPP      "\+w"
+    }
+    set DECRQSS_DICT [dict create]
+    foreach {desc name str} $DECRQSS_DATA {
+        dict set DECRQSS_DICT $name $str
+    }
+
+    #emit DECRQSS and get DECRPSS response
+    # ---------------------
+    #NOTE: https://vt100.net/docs/vt510-rm/DECRPSS.html
+    #response: DCS Ps $ r D...D ST
+    #Conflict between above doc saying Ps of 0 indicates a valid request and 1 indicates invalid - and the behaviour of windows terminal, wezterm and the reported xterm behaviour
+    # shown at: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+    #REVIEW
+    # ---------------------
+    #Note also on Freebsd xterm we seem to getresponse ': 1 $ r D...D ST'
+    #(no leading DCS) - this 
+
+    lappend PUNKARGS [list {
+        @id     -id     ::punk::console::request_dec_setting
+        @cmd    -name   punk::console::request_dec_setting\
+            -summary\
+            {Perform DECRQSS query to get DECRPSS response}\
+            -help\
+            {DECRQSS query for DEC Selection or Setting.
+            Return payload from console's DECRPSS response.
+            }
+        @opts
+        -console -type list -minsize 2 -default {stdin stdout}
+        @values -min 1 -max 1
+        name -type string
+    }]
+    proc request_dec_setting {args} {
+        set argd [punk::args::parse $args withid ::punk::console::request_dec_setting]
+        lassign [dict values $argd] leaders opts values
+        set console [dict get $opts -console]
+        set name [dict get $values name]
+
+        variable DECRQSS_DICT
+        if {![dict exists $DECRQSS_DICT $name]} {
+            error "request_dec_setting unrecognised name $name. Known values: [dict keys $DECRQSS_DICT]"
+        }
+        set str [dict get $DECRQSS_DICT $name]
+        set re_str [string map [list * \\* \$ \\\$ + \\+ ( \\(] $str] ;#regex escaped
+        #review {[0-9;:]} - too restrictive? - what values can be returned? alnum? - we perhaps at least need to exclude ESC so we don't overmatch
+        set capturingregex [string map [list %s% $re_str] {(.*)(\x1bP([0-1]\$r[0-9;:]*)(?:%s%){0,1}\x1b\\)$}] ;#must capture prefix,entire-response,response-payload
+        #todo - handle xterm : [0-1] $ r D...D ST
+        set request "\x1bP\$q${str}\x1b\\"
+        set payload [punk::console::internal::get_ansi_response_payload -terminal $console $request $capturingregex]
+        set c1 [string index $payload 0]
+        switch -- $c1 {
+            0 {
+                error "request_dec_setting - terminal doesn't recognise request '[punk::ansi::ansistring VIEW $request]' as valid"
+            }
+            1 {}
+            default {
+                #shouldn't get here
+                error "request_dec_setting - unrecognised response to request '[punk::ansi::ansistring VIEW $request]'. payload: [punk::ansi::ansistring VIEW $payload]"
+            }
+        }
+        #strip leading 1$r
+        return [string range $payload 3 end]
+    }
 
     #terminals lie. This should be a reasonable (albeit relatively slow) test of actual width - but some terminals seem to miscalculate.
     #todo - a visual interactive test/questionnaire to ask user if things are lining up or if the terminal is telling fibs about cursor position.

src/vfs/_vfscommon.vfs/modules/punk/sixel-0.1.0.tm

@@ -134,7 +134,7 @@ tcl::namespace::eval punk::sixel {
         if {$cell_size_override ne ""} {
             lassign [split [string tolower $cell_size_override] x] cwidth cheight
             if {![string is integer -strict $cwidth] || ![string is integer -strict $cheight]} {
-                error "punk::sixel::get_info -cell_sixe must be of the form WxH where W and H are positive integers"
+                error "punk::sixel::get_info -cell_sixel must be of the form WxH where W and H are positive integers"
             }
             set cell_size $cell_size_override
         } else {
@@ -143,7 +143,11 @@ tcl::namespace::eval punk::sixel {
         lassign [split $cell_size x] cwidth cheight
         set height_cells [expr {int(ceil($height_pixels /double($cheight)))}] 
         set sixelparams ""
-        set sixel_extents [list] ;#number of sixes in each line taking into account retraces due to $
+        set sixel_extents [list] ;#number of sixels in each line taking into account retraces due to $
+
+        #REVIEW
+        #There can be multiple raster-attribute instructions repeatedly changing the size and aspect ratio of subsequent pixels.
+        #see sixel/multisize.six
 
         set line0 [lindex $raster_lines 0]
         if {[regexp -indices {^\x1bP([;0-9]*)q} $line0 i_match]} {
@@ -219,6 +223,48 @@ tcl::namespace::eval punk::sixel {
     }
 
 
+    punk::args::define {
+        @id     -id ::punk::sixel::can_sixel
+        @cmd    -name punk::sixel::can_sixel\
+            -summary\
+            "Report whether terminal can display sixel graphics."\
+            -help\
+            "return a boolean indicating whether the terminal has sixel capability."
+        -refresh -type none -help\
+            "When supplied, will make a new call to punk::console::get_device_attributes,
+            rather than relying on a cached answer"
+        @values -min 0 -max 1
+        terminal -type list -minsize 2 -default {stdin stdout}
+    }
+    #review
+    variable device_attribute_cache
+    set device_attribute_cache [dict create]
+    proc can_sixel {args} {
+        set argd [punk::args::parse $args withid ::punk::sixel::can_sixel]
+        lassign [dict values $argd] leaders opts values received
+        set terminal [dict get $values terminal]
+
+        variable device_attribute_cache
+        if {[dict exists $received -refresh]} {
+            set attribs [punk::console::get_device_attributes $terminal]
+            dict set device_attribute_cache $terminal $attribs
+        } else {
+            if {[dict exists $device_attribute_cache $terminal]} {
+                set attribs [dict get $device_attribute_cache $terminal]
+            } else {
+                set attribs [punk::console::get_device_attributes $terminal]
+                dict set device_attribute_cache $terminal $attribs
+            }
+        }
+
+        set codes [split $attribs {;}]
+        if {"4" in $codes} {
+            return true
+        } else {
+            return false
+        }
+    }
+
     #*** !doctools
     #[list_end] [comment {--- end definitions namespace punk::sixel ---}]
 }