View or download lineWrapper.frink in plain text format
/** This contains routines for wrapping a string to a specified width. It
uses Frink's smart Unicode-aware routines for finding line-wrapping points
and by counting individual graphemes correctly.
*/
/** Wrap a string to an array of lines, removing any newline characters in the
string.
TODO: Attempt to hyphenate words if it gives better fill? Should these
be options?
TODO: Attempt to hyphenate words that are fully too long for the line?
*/
wrapToArray[str, cols] :=
{
length = 0
result = new array
currLine = ""
WORD:
for word = lineBreakList[str]
{
println[toASCII[word]]
finishLine = false
// lineBreakList returns words with the \n or \r character appended when
// that occurs.
// If word ends with line terminator, remove it and finalize the line
if word =~ %r/\r\n|\r|\n|\u2028|\u2029|\u000B|\u000C|\u0085$/
{
word =~ %s/(.*)\r\n|\r|\n|\u2028|\u2029|\u000B|\u000C|\u0085$/$1/
finishLine = true
}
wordLen = graphemeLength[word]
if length + wordLen <= cols
{
// Word fits on the line
currLine = currLine + word
length = length + wordLen
if (finishLine)
{
result.push[currLine]
currLine = ""
length = 0
}
} else
{
// Word doesn't fit, create new line
if length > 0 // Unless the current line is already empty
result.push[currLine]
currLine = word
length = wordLen
if (finishLine)
{
result.push[currLine]
currLine = ""
length = 0
}
}
}
// Append any remaining text
if length > 0
result.push[currLine]
return result
}
/** Wrap a string to the specified width, returning the result as a single
big string with embedded newlines. */
wrap[str, cols] :=
{
return join["\n", wrapToArray[str, cols]]
}
View or download lineWrapper.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 18664 days, 18 hours, 44 minutes ago.