textutil::adjust(n)				    Text and string utilities, macro processing 			       textutil::adjust(n)

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NAME

       textutil::adjust - Procedures to adjust, indent, and undent paragraphs

SYNOPSIS

       package require Tcl  8.2

       package require textutil::adjust  ?0.7?

       ::textutil::adjust::adjust string ?option value...?

       ::textutil::adjust::readPatterns filename

       ::textutil::adjust::listPredefined

       ::textutil::adjust::getPredefined filename

       ::textutil::adjust::indent string prefix ?skip?

       ::textutil::adjust::undent string

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DESCRIPTION

       The  package  textutil::adjust  provides commands that manipulate strings or texts (a.k.a. long strings or string with embedded newlines or
       paragraphs), adjusting, or indenting them.

       The complete set of procedures is described below.

       ::textutil::adjust::adjust string ?option value...?
	      Do a justification on the string according to the options.  The string is taken as one big paragraph, ignoring any  newlines.   Then
	      the  line  is  formatted	according  to  the options used, and the command returns a new string with enough lines to contain all the
	      printable chars in the input string. A line is a set of characters between the beginning of the string and a newline, or	between  2
	      newlines, or between a newline and the end of the string. If the input string is small enough, the returned string won't contain any
	      newlines.

	      Together with ::textutil::adjust::indent it is possible to create properly wrapped paragraphs with arbitrary indentations.

	      By default, any occurrence of space or tabulation characters are replaced by a single space so that each word in a line is separated
	      from the next one by exactly one space character, and this forms a real line.  Each real line is placed in a logical line, which has
	      exactly a given length (see the option -length below).  The real line may be shorter. Again by default, trailing spaces are  ignored
	      before returning the string (see the option -full below).

	      The following options may be used after the string parameter, and change the way the command places a real line in a logical line.

	      -full boolean
		     If  set  to  false (default), trailing space characters are deleted before returning the string. If set to true, any trailing
		     space characters are left in the string.

	      -hyphenate boolean
		     If set to false (default), no hyphenation will be done. If set to true, the command will try to hyphenate the last word of  a
		     line. Note: Hyphenation patterns must be loaded prior, using the command ::textutil::adjust::readPatterns.

	      -justify center|left|plain|right
		     Sets  the justification of the returned string to either left (default), center, plain or right. The justification means that
		     any line in the returned string but the last one is build according to the value.	If the justification is set to	plain  and
		     the  number  of printable chars in the last line is less than 90% of the length of a line (see the option -length), then this
		     line is justified with the left value, avoiding the expansion of this line when it is too small. The meaning  of  each  value
		     is:

		     center The  real  line is centered in the logical line. If needed, a set of space characters are added at the beginning (half
			    of the needed set) and at the end (half of the needed set) of the line if required (see the option -full).

		     left   The real line is set on the left of the logical line. It means that there are no space chars at the beginning of  this
			    line. If required, all needed space chars are added at the end of the line (see the option -full).

		     plain  The  real line is exactly set in the logical line. It means that there are no leading or trailing space chars. All the
			    needed space chars are added in the real line, between 2 (or more) words.

		     right  The real line is set on the right of the logical line. It means that there are no space chars at the end of this line,
			    and there may be some space chars at the beginning, despite of the -full option.

	      -length integer
		     Set the length of the logical line in the string to integer.  integer must be a positive integer value. Defaults to 72.

	      -strictlength
		     boolean]  If  set to false (default), a line can exceed the specified -length if a single word is longer than -length. If set
		     to true, words that are longer than -length are split so that no line exceeds the specified -length.

       ::textutil::adjust::readPatterns filename
	      Loads the internal storage for hyphenation patterns with the contents of the file filename. This has to be  done	prior  to  calling
	      command ::textutil::adjust::adjust with "-hyphenate true", or the hyphenation process will not work correctly.

	      The  package comes with a number of predefined pattern files, and the command ::textutil::adjust::listPredefined can be used to find
	      out their names.

       ::textutil::adjust::listPredefined
	      This command returns a list containing the names of the hyphenation files coming with this package.

       ::textutil::adjust::getPredefined filename
	      Use this command to query the package for the full path name of the hyphenation file filename coming  with  the  package.  Only  the
	      filenames found in the list returned by ::textutil::adjust::listPredefined are legal arguments for this command.

       ::textutil::adjust::indent string prefix ?skip?
	      Each  line  in the string is indented by adding the string prefix at its beginning. The modified string is returned as the result of
	      the command.

	      If skip is specified the first skip lines are left untouched. The default for skip is 0, causing the modification of all lines. Neg-
	      ative values for skip are treated like 0. In other words, skip > 0 creates a hanging indentation.

	      Together with ::textutil::adjust::adjust it is possible to create properly wrapped paragraphs with arbitrary indentations.

       ::textutil::adjust::undent string
	      The  command computes the common prefix for all lines in string consisting solely out of whitespace, removes this from each line and
	      returns the modified string.

	      Lines containing only whitespace are always reduced to completely empty lines. They and empty lines are also ignored when  computing
	      the prefix to remove.

	      Together with ::textutil::adjust::adjust it is possible to create properly wrapped paragraphs with arbitrary indentations.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category textutil
       of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

SEE ALSO

       regexp(n), split(n), string(n)

KEYWORDS

       TeX, adjusting, formatting, hyphenation, indenting, justification, paragraph, string, undenting

CATEGORY

       Text processing

textutil								0.7						       textutil::adjust(n)