684 lines
22 KiB
Plaintext
684 lines
22 KiB
Plaintext
This file describes recent user-visible changes in groff. Bug fixes
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are not described. There are more details in the man pages.
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VERSION 1.09
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============
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\(rn will now produce a character that has the traditional metrics,
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and will form corners with \(ul and \(br. This means that it will not
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align properly with \(sr. Instead there's a new character
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\[radicalex] which aligns with \(sr; this is used by eqn for doing
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square roots.
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Troff
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-----
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The `pso' request allows you to read from the standard output of a
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command.
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Grops
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-----
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The PSPIC macro has options to allow the horizontal alignment of the
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graphic to be specified.
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VERSION 1.08
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============
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Troff
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-----
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The escape sequence \V[xxx] will interpolate the value of the
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environment variable xxx.
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Tbl
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---
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The decimalpoint option can be used to specify the character to be
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recognized as the decimal point character in place of the default
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period.
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VERSION 1.07
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============
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Groff
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-----
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The environment variable GROFF_COMMAND_PREFIX can be used to control
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whether groff looks for `gtroff' or `troff' (similarily for the
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preprocessors.)
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Troff
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-----
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Multilingual hyphenation is supported by new `hpf' and `hla' requests,
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and by a `\n[.hla]' number register. The -H option has been removed.
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Files of hyphenation patterns can have comments.
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When a font cannot be found, troff gives a warning (of type `font',
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enabled by default) instead of an error.
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There's a new request `trnt' that's like `tr' except that it doesn't
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apply to text transparently throughput into a diversion with \!.
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Tbl
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---
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There is a `nokeep' option which tells tbl not to use diversions to
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try to keep the table on one page.
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Eqn
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---
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Setting the parameter `nroff' to a non-zero value causes `ndefine' to
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behave like `define' and `tdefine' to be ignored. This is done by
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eqnrc when the current device is ascii or latin1. There's a `neqn'
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script that just does `eqn -Tascii'.
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Grotty
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------
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grotty uses whatever page length was specified using the `pl' request
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rather than using the paperlength command in the DESC file. The
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paperwidth command in the DESC file is also ignored.
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VERSION 1.06
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============
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The programs in groff that have Unix counterparts can now be installed
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without a leading `g' prefix. See the `g' variable in the Makefile.
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The g?nroff script simulates the nroff command using groff.
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New special characters \(+h, \(+f, \(+p, \(Fn, \(Bq, \(bq, \(aq, \(lz,
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\(an. See groff_char(7).
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^L is now a legal input character.
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Groff
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-----
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The Xps pseudo-device has disappeared. Instead there is a new -X
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option that tells groff to use gxditview instead of the usual
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postprocessor. (So instead of -TXps, use -XTps or just -X if your
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default device is ps.)
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The postprocessor to be used for a particular device is now specified
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by a `postpro' command in the DESC file rather than being compiled
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into groff. Similarly the command to be used for printing (with the
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-l option) is now specified by a `print' command in the DESC file.
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The groff command no longer specifies eqnchar as an input file for
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eqn. Instead eqn automatically loads a file `eqnrc'. The groff
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command no longer passes the -D option to eqn. Instead eqnrc sets the
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draw_lines parameter.
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The groff command no longer tells troff to load a device-specific
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macro file. This is handled instead by the `troffrc' file, which is
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always loaded by troff.
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The shell script version of groff has been removed.
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Troff
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-----
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The `rchar' request removes a character definition established with `char'.
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Compatibility mode is disabled and the escape character is set to `\'
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while a character definition is being processed.
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The `\#' escape sequence is like `\%' except that the terminating
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newline is ignored.
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The `shc' request tells troff which character to insert (instead of
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the default \(hy) when a word is hyphenated at a line break.
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A font name of 0 (zero) in the DESC file will cause no font to be
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mounted on the corresponding font position. This is useful for
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arranging that special fonts are mounted on positions on which users
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are not likely explicitly to mount fonts. All groff devices now avoid
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initially mounting fonts on positions 5-9.
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The `do' request allows a single request or macro to be interpreted
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with compatibility mode disabled.
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troff automatically loads a file `troffrc' before any other input file.
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This can be prevented with the -R option. This file is responsible
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for loading the device-specific macros.
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Pic
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---
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The -x option has been removed and a -n option has been added. By
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default, pic now assumes that the postprocessor supports groff
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extensions. The -n option tells pic to generate output that works
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with ditroff drivers. The -z option now applies only to TeX mode.
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The -p option has been removed. Instead if the -n option is not
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specified, pic generates output that uses \X'ps: ...' if the \n(0p
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register is non-zero and tmac.ps sets this register to 1.
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In places where you could 1st or 5th you can now say `i'th or `i+1'th
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(the quotes are required).
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Eqn
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---
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Eqn now automatically reads a file `eqnrc' from the macro directory.
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This performs the same role that the eqnchar files used to. This can
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be prevented by the -R option.
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Setting the draw_lines parameter to a non-zero value causes lines to
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be drawn using \D rather than \l. The -D option is now obsolete.
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`uparrow', `downarrow' and `updownarrow' can be used with `left' and
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`right'.
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The amount of extra space added before and after lines containing
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equations can be controlled using the `body_height' and `body_depth'
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parameters.
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Grops
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-----
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Font description files have been regenerated from newer AFM files.
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You can get access to the additional characters present in the text
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fonts in newer PostScript printers by using -mpsnew.
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The default value of the -b option is specified by a `broken' command
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in the DESC file.
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With the -g option, grops will generate PostScript code that guesses
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the page height. This allows documents to be printed on both letter
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(8.5x11) and A4 paper without change.
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Grodvi
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------
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ISO Latin-1 characters are available with -Tdvi. Format groff_char(7)
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with groff -Tdvi for more information.
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Grotty
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------
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The -mtty-char macros contain additional character definitions for
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use with grotty.
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Macros
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------
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In previous releases the groff -me macros treated the $r and $R number
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registers in a way that was incompatible with the BSD -me macros. The
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reason for this was that the approach used by the BSD -me macros does
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not work with low resolution devices such as -TX75 and -TX100.
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However, this caused problems with existing -me documents. In this
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release, the vertical spacing is controlled by the $v and $V registers
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which have the same meaning as $r and $R in earlier groff releases.
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In addition, if the $r or $R register is set to a value that would be
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correct for for the BSD -me macros and a low resolution device is not
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being used, then an appropriate value for the $v or $V register will
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be derived from the $r or $R register.
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The groff -me macros work with -C and (I think) with Unix troff.
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For backward compatibility with BSD -me, the \*{ and \*} strings are
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also available as \*[ and \*]. Of course, \*[ will only be usable
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with -C.
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The \*T string has been deleted. Use \*(Tm instead.
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Xditview
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--------
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The `n', Space and Return keys are bound to the Next Page action. The
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`p', BackSpace and Delete keys are bound to the Previous Page action.
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The `q' key is bound to the Quit action.
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The `r' key is bound to a rerasterize action that reruns groff, and
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redisplays the current page.
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VERSION 1.05
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============
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Pic
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---
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There is a alternative assignment operator `:=' which interacts
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differently with blocks.
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There is a new command `command', which allows the values of variables
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to be passed through to troff or TeX.
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The `print' command now accepts multiple arguments.
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String comparison expressions (using `==' or `!=') are allowed in more
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contexts.
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Grotty
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------
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Horizontal and vertical lines drawn with \D'l ...' will be rendered
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using -, | and + characters. This is intended to give reasonable
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results with boxed tables. It won't work well with pic.
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Macros
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------
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The -mdoc macros have been upgraded to the version in the second
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Berkeley networking release. This version is not completely
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compatible with earlier versions; the old version is still available
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as -mdoc.old. The grog script has been enhanced so that it can
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usually determine whether a document requires the old or new versions.
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With -TX75, -TX100 and -TXps, the PSPIC macro will produce a box
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around where the picture would appear with -Tps.
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VERSION 1.04
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============
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An implementation of the -mm macros is included.
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The directory in which temporary files are created can be controlled
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by setting the GROFF_TMPDIR or TMPDIR environment variables.
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Pic
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---
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Some MS-DOS support (see pic/make-dos-dist).
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Grops
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-----
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There are two new \X commands (\X'ps: invis' and \X'ps: endinvis')
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which make it possible to have substitute characters that are
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displayed when previewing with -TXps but ignored when printing with
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grops.
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Xditview
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--------
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Support for scalable fonts.
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VERSION 1.03
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============
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No changes other than bug fixes.
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VERSION 1.02
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============
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There is an implementation of refer and associated programs. groff -R
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preprocesses with grefer; no mechanism is provided for passing
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arguments to grefer because most grefer options have equivalent
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commands which can be included in the file. grog also supports refer.
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There is an alternative perl implementation of the grog script.
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The code field in lines in the charset section of font description
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files is now allowed to contain an arbitrary integer (previously it
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was required to lie between 0 and 255). Currently grops and grodvi
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use only the low order 8 bits of the value. Grodvi will use the
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complete value; however, this is unlikely to be useful with
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traditional TeX tools (.tfm files only allow 8 bit character codes.)
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Left and right double quotes can be obtained with \(lq and \(rq
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respectively.
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There is a new program called pfbtops which translates PostScript
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fonts in pfb format to ASCII.
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A slightly modified version of the Berkeley tmac.doc is included.
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Troff
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-----
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In long escape names the closing ] is now required to be at the same
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input level as the opening [.
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The \A'S' escape sequence returns 1 or 0 according as S is or is not
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suitable for use as a name.
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\~ produces an unbreakable space that can be stretched when the line
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is adjusted.
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The `mso' request is like the `so' request except that it searches for
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the file in the same directories in which tmac.X is searched for when
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the -mX option is given.
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The escape sequence `\R' is similar to the `nr' request.
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Eqn
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---
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A new `special' primitive allows you to add new types of unary
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constructs by writing a troff macro.
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Pic
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---
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The implementation no longer uses gperf.
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Grops
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-----
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The compile-time -DBROKEN_SPOOLER option has been replaced by a
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BROKEN_SPOOLER_FLAGS option. This allows more precise control over
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how grops should workaround broken spoolers and previewers. There is
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a new -b option that can change this at run-time.
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Grops now generates PostScript that complies with version 3.0 of the
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Document Structuring Convention.
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The resource management component of grops (the part that deals with
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imported documents and downloadable fonts) has been rewritten and now
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supports version 3.0 of the Document Structuring Conventions. The
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%%DocumentFonts comment is no longer supported; you must use the
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%%Document{Needed,Supplied}{Fonts,Resources} comments instead
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(or as well.)
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tmac.psatk contains some macros that support the mechanism used by the
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Andrew Toolkit for including PostScript graphics in troff documents.
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Xditview
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--------
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Parts of xditview have been rewritten so that it can be used with the
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output of gtroff -Tps. groff -TXps will run gtroff -Tps with
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gxditview.
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There is a new menu entry `Print' which brings up a dialog box for
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specifying a command with which the file being previewed should be
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printed.
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Xditview now uses imake.
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VERSION 1.01
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============
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The groff command now understands the gtroff `-a' and `-i' options.
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With the `m' and `n' scale indicators, the scale factor is rounded
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horizontally before being applied. This makes (almost) no difference
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for devices with `hor' equal to 1, but it makes groff with -Tascii or
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-Tlatin1 behave more like nroff in its treatment of these scale
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indicators. Accordingly tmac.tty now calls the `nroff' request so
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that the `n' condition will be true.
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The device-specific macros (tmac.ps, tmac.dvi, tmac.tty and tmac.X)
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have been made to work at least somewhat with -C. In particular the
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special characters defined by these macros now work with -C.
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groff -Tdvi -p will now pass pic the -x flag; this will enable filling
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of arrowheads and boxes, provided that your dvi driver supports the
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latest version of the tpic specials.
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Eqn
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---
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There is a new `-N' option that tells eqn not to allow newlines in
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delimiters. This allows eqn to recover better from missing closing
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delimiters. The groff command will pass on a `-N' option to eqn.
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Grops
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-----
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You can now use psfig with grops. See the file ps/psfig.diff. I do
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not recommend using psfig for new documents.
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The command \X'ps: file F' is similar to \X'ps: exec ...' except that
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the PostScript code is read from the file F instead of being contained
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within the \X command. This was added to support psfig.
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Grodvi
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------
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There are font files HB and HI corresponding to cmsssbx10 and cmssi10.
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Macros
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------
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The groff -me macros now work with the -C option. As a result, they
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may also work with Unix nroff/troff.
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In -me, the $r and $R number registers now contain the line spacing as
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a percentage of the pointsize expressed in units (normally about 120).
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The previous definition was useless with low resolution devices such
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as X75 and X100.
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VERSION 1.00
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============
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A -ms-like macro-package is now included.
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The name for the Icelandic lowercase eth character has been changed
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from \(-d to \(Sd.
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Troff
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-----
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There is a new request `nroff', which makes the `n' built-in condition
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true and the `t' built-in condition false; also a new request `troff'
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which undoes the effect of the `nroff' request. This is intended only
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for backward compatibility: it is usually better to test \n(.H or
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\n(.V or to use the `c' built-in condition.
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The \R escape sequence has been deleted. Use \E instead.
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There are `break' and `continue' requests for use with the `while'
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request.
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There is a request `hym' that can ensure that when the current
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adjustment mode is not `b' a line will not be hyphenated if it is no
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more than a given amount short, and a request `hys' that can ensure
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that when the current adjustment mode is `b' a line will not be
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hyphenated if it can be justified by adding no more than a given
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amount of extra space to each word space.
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There is a request `rj' similar to `ce' that right justifies lines.
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A warning of type `space' will be given when a call is made to an
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undefined request or macro with a name longer than two characters, and
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the first two characters of the name make a name that is defined.
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This is intended to find places where a space has been omitted been a
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request or macro and its argument. This type of warning is enabled by
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default.
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Pic
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---
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A comma is permitted between the arguments to the `reset' command.
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For use with TeX, there is a new `-c' option that makes gpic treat
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lines beginning with `.' in a way that is more compatible with tpic
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(but ugly).
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Eqn
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---
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It is no longer necessary to add `space 0' at the beginning of
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complicated equations inside pictures.
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`prime' is now treated as an ordinary character, as in Unix eqn. The
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previous behaviour of `prime' as an operator can now be obtained using
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`opprime'.
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Xditview
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--------
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There are two new devices X75-12 and X100-12 which are the same as X75
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and X100 except that they are optimized for documents that use mostly
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12 point text.
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VERSION 0.6
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===========
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The installation process has been refined to make it easy for you to
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share groff with someone who has the same type of machine as you but
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does not have a C++ compiler. See the end of the INSTALL file for
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details.
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There is a man page for the tfmtodit program which explains how to use
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your own fonts with groff -Tdvi.
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There is a man page for afmtodit which explains how to use your own
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PostScript fonts with groff -Tps.
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The \N escape sequence is now fully supported. It can now be used to
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access any character in a font by its output code, even if it doesn't
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have a groff name. This is made possible by a convention in the font
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files that a character name of `---' refers to an unnamed character.
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The drivers now all support the `N' command required for this. The font
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description files have been updated to include unnamed characters.
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The `x' command in font description files has been removed: instead
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any unknown commands are automatically made available to the drivers.
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If you constructed your own font files with an earlier version of
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tfmtodit or afmtodit, you must construct them again using the current
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version.
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Characters between 0200 and 0237 octal are no longer legal input
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characters. Note that these are not used in ISO 8859.
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A command called `grog' has been added, similar to the `doctype'
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command described in Kernighan and Pike.
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Groff
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-----
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The groff command has some new options: -V prints the pipeline
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instead of executing it; -P passes an argument to the postprocessor,
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-L passes an argument to the spooler.
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There is a C++ implementation of the groff command. This handles some
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things slightly better than the shell script. In particular, it can
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correctly handle arguments containing characters that have a special
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meaning to the shell; it can give an error message when child
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processes other than the last in the pipeline terminate abnormally;
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its exit status can take account of the exit statuses of all its child
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processes; it is a little more efficient; when geqn is used, it
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searches for the eqnchar file in the same way that font metric files
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are searched for, rather than expecting to find it in one particular
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directory.
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Gtroff
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------
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There is font translation feature: For example, you can tell gtroff to
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use font `HR' whenever font `H' is requested with the line
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.ftr H HR
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This would be useful for a document that uses `H' to refer to
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Helvetica.
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There are some new number registers: `.kern' contains the current kern
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mode, `.lg' the current ligature mode, `.x' the major version number,
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`.y' the minor version number, `.ce' the number of lines to be
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centered in the current environment, `.trunc' the amount of vertical
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space truncated by the most recently sprung vertical position trap,
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`.ne' the amount of vertical space needed in the last `ne' request
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that caused a vertical position trap to be sprung.
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The `cf' request now behaves sensibly in a diversion. If used in a
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diversion, it will now arrange for the file to be copied to the output
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when the diversion is reread.
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There is a new request `trf' (transparent file) similar to `cf', but
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more like `\!'.
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There is a new escape sequence `\Y[xxx]', roughly equivalent to
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`\X'\*[xxx]'', except that the contents of string or macro xxx are not
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interpreted, and xxx may contain newlines. This requires an output
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format extension; the drivers have been modified to understand this.
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Grops has also been modified to cope with newlines in the arguments to
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\X commands; grops has a new \X command mdef, which is like def except
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that it has a first argument giving the number of definitions.
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There is a new warning category `escape' which warns about unknown
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escape sequences.
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The `fp' request now takes an optional third argument giving the external
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name of the font.
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The `\_' character is now automatically translated to `\(ul' as in troff.
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The environment variable `GROFF_HYPHEN' gives the name of the file
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containing the hyphenation patterns.
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There is a `\C'xxx'' escape sequence equivalent to `\[xxx]'.
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Characters ", ', ), ], *, \(dg are now initially transparent for the purposes
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of end of sentence recognition.
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There is an anti-recursion feature in the `char' request, so you can
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say `.char \(bu \s+2\(bu\s-2'.
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The limit on the number of font positions has been removed.
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Accordingly `\n[.fp]' never returns 0.
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The restriction on the number of numbered environments has been removed.
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There is a new escape sequence `\E' that makes it possible to
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guarantee that an escape sequence won't get interpreted in copy-mode.
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The `\R' escape sequence is accordingly now deprecated.
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Gpic
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----
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Arguments of the form `X anything X' (in the `copy thru', `sh', `for',
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`if' and `define' constructs) can now be of the form `{ anything }'.
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If the `linethick' variable is negative (as it now is initially),
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lines will be drawn with a thickness proportional to the current point
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size.
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The `rand' function now takes no arguments and returns a number between
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0 and 1. The old syntax is still supported.
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`^' can be used in expressions to indicate exponentiation.
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In the `for' construct the argument to the by clause can be prefixed
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by `*' to indicate that the increment is multiplicative.
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A bare expression may be used as an attribute. If the current
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direction is `dir', then an attribute `expr' is equivalent to
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`dir expr'
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There is a `sprintf' construct that allows numbers to be formatted and used
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wherever a quoted string can be used.
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The height of a text object without an explicit height attribute is
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the number of text strings associated with the object times the value
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of the `textht' variable.
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The maximum height and width of a picture is controlled by the
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`maxpswid' and `maxpsht' variables.
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Gtbl
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----
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Gtbl can now handle gracefully the situation where the `ce' request
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has been applied to a table.
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Geqn
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----
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The `ifdef' primitive has been generalized.
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A tilde accent can be put underneath a box using `utilde'. This
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defined using a general `uaccent' primitive.
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Grops
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-----
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There is a new PostScript font downloading scheme which handles font
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downloading for imported illustrations. Previously, the name of the
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file containing the font was given in the `x download' line in the
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groff font metric file. Now, there is a `download' file which says
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for each PostScript font name which file contains that font. Grops
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can also now handle inter-font dependencies, where one downloadable
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font depends on some other (possibly downloadable) font.
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The `T' font has been removed. The characters it used to provide are
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now provided by `char' definitions in tmac.ps. TSymbol.ps has also
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been removed, and the tweaks it provided are now provided by `char'
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definitions.
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