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# -*- tcl -*-
# Copyright (c) 2009 Andreas Kupries <andreas_kupries@sourceforge.net>
# Support package. Basic text generation commands.
# # ## ### ##### ######## ############# #####################
## Requirements
package require Tcl 8.4 ; # Required Core
namespace eval ::doctools::text {}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::begin {} {
variable state
array unset state *
array set state {
stack {}
buffer {}
prefix {}
pstack {}
underl {}
break 0
newlines 1
indenting 1
}
return
}
proc ::doctools::text::done {} {
variable state
return $state(buffer)
}
proc ::doctools::text::save {} {
variable state
set current [array get state]
begin
set state(stack) $current
return
}
proc ::doctools::text::restore {} {
variable state
set text [done]
array set state $state(stack)
return $text
}
proc ::doctools::text::collect {script} {
save
uplevel 1 $script
return [restore]
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::+ {text} {
variable state
if {$state(break)} {
+++ [string repeat \n $state(break)]
+++ $state(prefix)
set state(break) 0
}
+++ $text
set state(underl) [string length $text]
return
}
proc ::doctools::text::underline {char} {
variable state
newline
+ [string repeat [string index $char 0] $state(underl)]
newline
return
}
proc ::doctools::text::+++ {text} {
variable state
append state(buffer) $text
return
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::newline {{increment 1}} {
variable state
if {!$state(newlines)} { return 0 }
incr state(break) $increment
return 1
}
proc ::doctools::text::newline? {} {
variable state
if {!$state(newlines)} { return 0 }
if {$state(break)} { return 1 }
if {![string length $state(buffer)]} { return 1 }
if {[string index $state(buffer) end] eq "\n"} { return 1 }
incr state(break)
return 1
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::prefix {text} {
variable state
if {!$state(indenting)} return
set state(prefix) $text
return
}
proc ::doctools::text::indent {{increment 2}} {
variable state
if {!$state(indenting)} return
lappend state(pstack) $state(prefix)
set state(prefix) [string repeat { } $increment]$state(prefix)
return
}
proc ::doctools::text::dedent {} {
variable state
if {!$state(indenting)} return
set state(prefix) [lindex $state(pstack) end]
set state(pstack) [lreplace $state(pstack) end end]
return
}
proc ::doctools::text::indented {increment script} {
indent $increment
uplevel 1 $script
dedent
return
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::indenting {enable} {
variable state
set state(indenting) $enable
return
}
proc ::doctools::text::newlines {enable} {
variable state
set state(newlines) $enable
return
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::field {wvar elements {index {}}} {
upvar 1 $wvar width
set width 0
#puts @!$width
if {$index ne {}} {
foreach e $elements {
#puts stdout @/$e
set e [lindex $e $index]
#puts stdout @^$e
set l [string length $e]
if {$l <= $width} continue
set width $l
}
} else {
foreach e $elements {
#puts stdout @/$e
set l [string length $e]
if {$l <= $width} continue
set width $l
}
}
#puts stdout @=$width
return
}
proc ::doctools::text::right {wvar str} {
upvar $wvar width
return [format %${width}s $str]
}
proc ::doctools::text::left {wvar str} {
upvar $wvar width
return [format %-${width}s $str]
}
# # ## ### ##### ######## ############# #####################
proc ::doctools::text::import {{namespace {}}} {
uplevel 1 [list namespace eval ${namespace}::text {
namespace import ::doctools::text::*
}]
return
}
proc ::doctools::text::importhere {{namespace ::}} {
uplevel 1 [list namespace eval ${namespace} {
namespace import ::doctools::text::*
}]
return
}
# # ## ### ##### ######## ############# #####################
namespace eval ::doctools::text {
variable state
array set state {}
namespace export begin done save restore collect + underline +++ \
prefix indent dedent indented indenting newline newlines \
field right left newline?
}
# # ## ### ##### ######## ############# #####################
package provide doctools::text 0.1
return
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