[//000000001]: # (textutil::adjust \- Text and string utilities, macro processing) [//000000002]: # (Generated from file 'adjust\.man' by tcllib/doctools with format 'markdown') [//000000003]: # (textutil::adjust\(n\) 0\.7\.3 tcllib "Text and string utilities, macro processing")
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# NAME textutil::adjust \- Procedures to adjust, indent, and undent paragraphs # Table Of Contents - [Table Of Contents](#toc) - [Synopsis](#synopsis) - [Description](#section1) - [Bugs, Ideas, Feedback](#section2) - [See Also](#seealso) - [Keywords](#keywords) - [Category](#category) # SYNOPSIS package require Tcl 8\.2 package require textutil::adjust ?0\.7\.3? [__::textutil::adjust::adjust__ *string* ?*option value\.\.\.*?](#1) [__::textutil::adjust::readPatterns__ *filename*](#2) [__::textutil::adjust::listPredefined__](#3) [__::textutil::adjust::getPredefined__ *filename*](#4) [__::textutil::adjust::indent__ *string* *prefix* ?*skip*?](#5) [__::textutil::adjust::undent__ *string*](#6) # 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\. Negative 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 Trackers](http://core\.tcl\.tk/tcllib/reportlist)\. Please also report any ideas for enhancements you may have for either package and/or documentation\. When proposing code changes, please provide *unified diffs*, i\.e the output of __diff \-u__\. Note further that *attachments* are strongly preferred over inlined patches\. Attachments can be made by going to the __Edit__ form of the ticket immediately after its creation, and then using the left\-most button in the secondary navigation bar\. # SEE ALSO regexp\(n\), split\(n\), string\(n\) # KEYWORDS [TeX](\.\./\.\./\.\./\.\./index\.md\#tex), [adjusting](\.\./\.\./\.\./\.\./index\.md\#adjusting), [formatting](\.\./\.\./\.\./\.\./index\.md\#formatting), [hyphenation](\.\./\.\./\.\./\.\./index\.md\#hyphenation), [indenting](\.\./\.\./\.\./\.\./index\.md\#indenting), [justification](\.\./\.\./\.\./\.\./index\.md\#justification), [paragraph](\.\./\.\./\.\./\.\./index\.md\#paragraph), [string](\.\./\.\./\.\./\.\./index\.md\#string), [undenting](\.\./\.\./\.\./\.\./index\.md\#undenting) # CATEGORY Text processing