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# TCL objectized library for PD api
# by Federico Ferri <mescalinum@gmail.com> - (C) 2007-2009
package provide pdlib 0.1
package require Tcl 8.5
set verbose 0
namespace eval ::pd {
proc error_msg {m} {
return "pdlib: [uplevel {lindex [info level 0] 0}]: error: $m"
}
proc add_inlet {self sel} {
if $::verbose {post [info level 0]}
variable _
tclpd_add_proxyinlet [tclpd_get_instance $self]
}
proc add_outlet {self sel} {
if $::verbose {post [info level 0]}
if {[lsearch -exact {bang float list symbol} $sel] == -1} {
return -code error [error_msg "unsupported selector: $sel"]
}
variable _
set o [outlet_new [tclpd_get_object $self] [gensym $sel]]
lappend _($self:x_outlet) $o
return $o
}
# used inside class for outputting some value
proc outlet {self n sel args} {
if $::verbose {post [info level 0]}
variable _
set outlet [lindex $_($self:x_outlet) $n]
switch -- $sel {
float {
set v [lindex $args 0]
outlet_float $outlet $v
}
symbol {
set v [lindex $args 0]
outlet_symbol $outlet $v
}
list {
set v [lindex $args 0]
set sz [llength $v]
set aa [new_atom_array $sz]
for {set i 0} {$i < $sz} {incr i} {
set_atom_array $aa $i [lindex $v $i]
}
outlet_list $outlet [gensym "list"] $sz $aa
delete_atom_array $aa $sz
}
bang {
outlet_bang $outlet
}
default {
return -code error [error_msg "unknown selector: $sel"]
}
}
}
# used internally (from dispatcher) to call a class method
proc call_classmethod {classname self inlet sel args} {
if $::verbose {post [info level 0]}
set m_sel "::${classname}_${inlet}_${sel}"
if {[llength [info commands $m_sel]] > 0} {
return [$m_sel $self {*}$args]
}
set m_any "::${classname}_${inlet}_anything"
if {[llength [info commands $m_any]] > 0} {
return [$m_any $self [list symbol $sel] {*}$args]
}
post "Tcl class $classname: inlet $inlet: no such method: $sel"
}
proc read_class_definition {classname def} {
set patchable_flag 1
set noinlet_flag 0
proc ::${classname}_object_save {self args} {return ""}
foreach {id arg} $def {
switch -- $id {
patchable {
if {$arg != 0 && $arg != 1} {
return -code error [error_msg "patchable must be 0/1"]
}
set patchable_flag $arg
}
noinlet {
if {$arg != 0 && $arg != 1} {
return -code error [error_msg "noinlet must be 0/1"]
}
set noinlet_flag $arg
}
default {
proc ::${classname}_${id} {self args} [concat "global _;" [regsub -all @(\\\$?\[\\w\\?\]+) $arg _(\$self:\\1)]]
}
}
}
# class level dispatcher (sort of class constructor)
proc ::$classname {self args} "
if \$::verbose {::pd::post \[info level 0\]}
::${classname}_constructor \$self {*}\$args
# object dispatcher
proc ::\$self {inlet selector args} \"
if \\\$::verbose {::pd::post \\\[info level 0\\\]}
::pd::call_classmethod $classname \$self \\\$inlet \\\$selector {*}\\\$args
\"
return \$self
"
# TODO: c->c_gobj = (typeflag >= CLASS_GOBJ)
set flag [expr {
8 * ($noinlet_flag != 0) +
3 * ($patchable_flag != 0)
}]
return $flag
}
# this handles the pd::class definition
proc class {classname def} {
if $::verbose {post [lrange [info level 0] 0 end-1]}
set flag [read_class_definition $classname $def]
# this wraps the call to class_new()
tclpd_class_new $classname $flag
}
proc guiclass {classname def} {
if $::verbose {post [lrange [info level 0] 0 end-1]}
set flag [read_class_definition $classname $def]
# this wraps the call to class_new()
tclpd_guiclass_new $classname $flag
}
# wrapper to post() withouth vargs
proc post {args} {
poststring2 [concat {*}$args]
}
proc args {} {
return [uplevel 1 "llength \$args"]
}
proc arg {n {assertion any}} {
upvar 1 args up_args
set up_args_len [llength $up_args]
if {$n < 0 || $n >= $up_args_len} {
return -code error "fatal: argument $n out of range"
}
set v [lindex $up_args $n]
set i 0
if {[llength $v] != 2} {
return -code error "fatal: malformed atom: $v (full args: $up_args)"
}
foreach {selector value} $v {break}
if {$assertion == {int}} {
set assertion {float}
set i 1
}
if {$assertion != {any}} {
if {$selector != $assertion} {
return -code error "arg #$n is $selector, must be $assertion"
}
}
if {$assertion == {float} && $i && $value != int($value)} {
return -code error "arg #$n is float, must be int"
}
if {$assertion == {float} && $i} {
return [expr {int($value)}]
} else {
return $value
}
}
proc default_arg {n assertion defval} {
if {$n < [uplevel "pd::args"]} {
return [uplevel "pd::arg $n $assertion"]
} else {
return $defval
}
}
# mechanism for uploading procs to gui interp, without the hassle of escaping [encoder]
proc guiproc {name argz body} {
# upload the decoder
sys_gui "proc guiproc {name argz body} {set map {}; for {set i 0} {\$i < 256} {incr i} {lappend map %\[format %02x \$i\] \[format %c \$i\]}; foreach x {name argz body} {set \$x \[string map \$map \[set \$x\]\]}; uplevel \[list proc \$name \$argz \$body\]}\n"
# build the mapping
set map {}
for {set i 0} {$i < 256} {incr i} {
set chr [format %c $i]
set hex [format %02x $i]
if {[regexp {[^A-Za-z0-9]} $chr]} {lappend map $chr %$hex}
}
# encode data
foreach x {name argz body} {set $x [string map $map [set $x]]}
# upload proc
sys_gui "guiproc $name $argz $body\n"
}
}
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