/usr/lib/tcltk/rivet2.3/rivet-tcl/wrap.tcl is in libapache2-mod-rivet 2.3.5-1.
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##
## wrap - Split a string on newlines. For each line, wrap the line at a space
## character to be equal to or shorter than the maximum length value passed.
##
## if a third argument called "-html" is present, the string is put together
## with html <br> line breaks, otherwise it's broken with newlines.
##
## $Id: wrap.tcl 1212149 2011-12-08 21:57:35Z mxmanghi $
##
###
namespace eval ::rivet {
proc wrap {string maxlen {html ""}} {
set splitstring {}
foreach line [split $string "\n"] {
lappend splitstring [wrapline $line $maxlen $html]
}
if {$html == "-html"} {
return [join $splitstring "<br>"]
} else {
return [join $splitstring "\n"]
}
}
##
## wrapline -- Given a line and a maximum length and option "-html"
## argument, split the line into multiple lines by splitting on space
## characters and making sure each line is less than maximum length.
##
## If the third argument, "-html", is present, return the result with
## the lines separated by html <br> line breaks, otherwise the lines
## are returned separated by newline characters.
##
proc wrapline {line maxlen {html ""}} {
set string [split $line " "]
set newline [list [lindex $string 0]]
foreach word [lrange $string 1 end] {
if {[string length $newline]+[string length $word] > $maxlen} {
lappend lines [join $newline " "]
set newline {}
}
lappend newline $word
}
lappend lines [join $newline " "]
if {$html == "-html"} {
return [join $lines <br>]
} else {
return [join $lines "\n"]
}
}
}
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