diff options
Diffstat (limited to 'doc/groff.texinfo')
| -rw-r--r-- | doc/groff.texinfo | 154 |
1 files changed, 97 insertions, 57 deletions
diff --git a/doc/groff.texinfo b/doc/groff.texinfo index a6bedfe3..b84db3c1 100644 --- a/doc/groff.texinfo +++ b/doc/groff.texinfo @@ -3751,8 +3751,12 @@ form. @Defescx {\\n, -, i, } @Defescx {\\n, @lparen{}+, id, } @Defescx {\\n, @lparen{}-, id, } +@Defescx {\\n, +@lparen{}, id, } +@Defescx {\\n, -@lparen{}, id, } @Defescx {\\n, @lbrack{}+, ident, @rbrack{}} @Defescx {\\n, @lbrack{}-, ident, @rbrack{}} +@Defescx {\\n, +@lbrack{}, ident, @rbrack{}} +@Defescx {\\n, -@lbrack{}, ident, @rbrack{}} Before interpolating, increment or decrement @var{ident} (one-character name @var{i}, two-character name @var{id}) by the auto-increment value as specified with the @code{nr} request (or the @code{\R} escape). If @@ -5508,10 +5512,12 @@ number register; it is associated with the current environment @cindex page number @cindex number, page @Defreq {pn, page} +@Defreqx {pn, @t{+}@Var{page}} +@Defreqx {pn, @t{-}@Var{page}} @Defregx {.pn} -The @code{pn} request changes the page number of the @emph{next} -page. The only argument is the page number; the request is ignored -without a parameter. +The @code{pn} request changes (increases or decreases) the page number +of the @emph{next} page. The only argument is the page number; the +request is ignored without a parameter. The read-only number register @code{.pn} contains the number of the next page: either the value set by a @code{pn} request, or the number of the @@ -5546,11 +5552,13 @@ register @code{%}. @rqindex pn @cindex new page @Defreq {bp, [@Var{page}]} +@Defreqx {bp, @t{+}@Var{page}} +@Defreqx {bp, @t{-}@Var{page}} To stop processing the current page, and move to the next page, invoke @code{bp}. This request causes a break. It can also take an argument -of what the next page should be numbered. The only difference between -@code{bp} and @code{pn} is that @code{pn} does not cause a break or -actually eject a page. +to set (increase, decrease) the page number of the next page. The +only difference between @code{bp} and @code{pn} is that @code{pn} does +not cause a break or actually eject a page. @Example .de newpage \" define macro @@ -5988,7 +5996,6 @@ request: @Example .char \[phone] \f[ZD]\N'37' @endExample -@endDefesc @noindent @pindex DESC @@ -5999,16 +6006,18 @@ description file after the @code{charset} command. It is possible to include unnamed characters in the font description file by using a name of @samp{---}; the @code{\N} escape sequence is the only way to use these. +@endDefesc @c XXX should be `glyph', not `character' -@rqindex cflags @cindex character properties @cindex properties of characters +@Defreq {cflags, n c1 c2 @dots{}} Each character has certain properties associated with it. These properties can be modified with the @code{cflags} request. The first argument is the the sum of the desired flags and the remaining -arguments are the characters to have those properties. +arguments are the characters to have those properties. It is possible +to omit the spaces between the characters. @table @code @item 1 @@ -6060,6 +6069,7 @@ newline or two spaces; in other words the character is this is the same as having a zero space factor in @TeX{} (initially characters @samp{"')]*\(dg\(rq} have this property). @end table +@endDefreq @cindex defining characters @cindex characters, defining @@ -6291,15 +6301,17 @@ disable it. The read-only number register @code{.kern} is set to@w{ If the font description file contains pairwise kerning information, characters from that font are kerned. Kerning between two characters can be inhibited by placing @code{\&} between them: @samp{V\&A}. + +@xref{Font File Format}. @endDefreq @cindex track kerning @cindex kerning, track -Track kerning expands or reduces the space between characters. This -can be handy, for example, if you need to squeeze a long word onto a -single line or spread some text to fill a narrow column. It must be -used with great care since it is usually considered bad typography if -the reader notices the effect. +@dfn{Track kerning} expands or reduces the space between characters. +This can be handy, for example, if you need to squeeze a long word +onto a single line or spread some text to fill a narrow column. It +must be used with great care since it is usually considered bad +typography if the reader notices the effect. @Defreq {tkf, f s1 n1 s2 n2} Enable track kerning for font@w{ }@var{f}. If the current font is@w{ @@ -6316,8 +6328,8 @@ The default unit is @samp{z} for @var{s1} and @var{s2}, @samp{p} for @endDefreq Sometimes, when typesetting letters of different fonts, more or less -space at such boundaries are needed. There are two escapes to help with -this. +space at such boundaries are needed. There are two escapes to help +with this. @cindex italic correction @cindex correction, italic @@ -6325,19 +6337,26 @@ this. @cindex roman character, correction after italic character @cindex italic character, correction before roman character @Defesc {\\/, , , } -The @code{\/} escape increases the width of the preceding character so -that the spacing between that character and the following character is -correct if the following character is a roman character. For example, -if an italic@w{ }@code{f} is immediately followed by a roman right +Increase the width of the preceding character so that the spacing +between that character and the following character is correct if the +following character is a roman character. For example, if an +italic@w{ }@code{f} is immediately followed by a roman right parenthesis, then in many fonts the top right portion of the @code{f} overlaps the top left of the right parenthesis. Use this escape -sequence whenever an italic character is immediately followed by a roman -character without any intervening space. This small amount of space is -also called @dfn{italic correction}. +sequence whenever an italic character is immediately followed by a +roman character without any intervening space. This small amount of +space is also called @dfn{italic correction}. -@c XXX example -@c producing @i{f}), which is ugly. Inserting \/ produces f) and avoids -@c this problem. +@iftex +@example +@group +\f[I]f\f[R]) + @result{} {@it f}@r{)} +\f[I]f\/\f[R]) + @result{} @i{f}@r{)} +@end group +@end example +@end iftex @endDefesc @cindex left italic correction @@ -6345,22 +6364,29 @@ also called @dfn{italic correction}. @cindex roman character, correction before italic character @cindex italic character, correction after roman character @Defesc {\\\,, , , } -The @code{\,} escape modifies the spacing of the following character so -that the spacing between that character and the preceding character is -correct if the preceding character is a roman character. Use this -escape sequence whenever a roman character is immediately followed by an -italic character without any intervening space. In analogy to above, -this space could be called @dfn{left italic correction}, but this term +Modify the spacing of the following character so that the spacing +between that character and the preceding character is correct if the +preceding character is a roman character. Use this escape sequence +whenever a roman character is immediately followed by an italic +character without any intervening space. In analogy to above, this +space could be called @dfn{left italic correction}, but this term isn't used widely. -@c XXX example -@c For example, inserting \, between the parenthesis and the f changes -@c (f to (f. +@iftex +@example +@group +q\f[I]f + @result{} @r{q}@i{f} +q\,\f[I]f + @result{} @r{q}@math{@ptexcomma}@i{f} +@end group +@end example +@end iftex @endDefesc @Defesc {\\&, , , } This inserts a zero-width character, which is invisible. Its intended -use is to stop interaction of a character with its surroundings. +use is to stop interaction of a character with its surrounding. @itemize @bullet @item @@ -6420,14 +6446,20 @@ request (@pxref{Character Translations}). @cindex vertical spacing @cindex spacing, vertical @code{gtroff} uses two dimensions with each line of text, type size -and vertical spacing. The @dfn{type size} is the height from the text -@dfn{baseline} to the top of the tallest character (descenders may -drop below this baseline). @dfn{Vertical spacing} is the amount of -space @code{gtroff} allows for a line of text; normally, this is about -20%@w{ }larger than the current type size. Ratios smaller than this -can result in hard-to-read text; larger than this, it spreads the text -out more vertically (useful for term papers). By default, -@code{gtroff} uses 10@w{ }point type on 12@w{ }point spacing. +and vertical spacing. The @dfn{type size} is approximately the height +of the tallest character.@footnote{This is usually the parenthesis. +Note that in most cases the real dimensions of the glyphs in a font +are @emph{not} related to its type size! For example, the standard +@acronym{PostScript} font families `Times Roman', `Helvetica', and +`Courier' can't be used together at 10@dmn{pt}; to get acceptable +output, the size of `Helvetica' has to be reduced by one point, and +the size of `Courier' must be increased by one point.} @dfn{Vertical +spacing} is the amount of space @code{gtroff} allows for a line of +text; normally, this is about 20%@w{ }larger than the current type +size. Ratios smaller than this can result in hard-to-read text; +larger than this, it spreads the text out more vertically (useful for +term papers). By default, @code{gtroff} uses 10@w{ }point type on +12@w{ }point spacing. @cindex leading The difference between type size and vertical spacing is known, by @@ -6446,12 +6478,14 @@ typesetters, as @dfn{leading}. @cindex type sizes, changing @Defreq {ps, [@Var{size}]} +@Defreqx {ps, @t{+}@Var{size}} +@Defreqx {ps, @t{-}@Var{size}} @Defescx {\\s, , size, } @Defregx {.s} -Use the @code{ps} request or the @code{\s} escape to change the type -size (in points). Specify @var{size} as either an absolute point -size, or as a relative change from the current size. The size@w{ }0, -or no argument, goes back to the previous size. +Use the @code{ps} request or the @code{\s} escape to change (increase, +decrease) the type size (in points). Specify @var{size} as either an +absolute point size, or as a relative change from the current size. +The size@w{ }0, or no argument, goes back to the previous size. Default unit of @code{ps} is @samp{z}. @@ -6502,9 +6536,15 @@ Some devices may only have certain permissible sizes, in which case @cindex current type size register @cindex current vertical spacing register -@Defreq {vs, space} +@Defreq {vs, [@Var{space}]} +@Defreqx {vs, @t{+}@Var{space}} +@Defreqx {vs, @t{-}@Var{space}} @Defregx {.v} -Changes the vertical spacing. The default unit is @samp{p}. +Change (increase, decrease) the vertical spacing by @var{space}. The +default unit is @samp{p}. + +If @code{vs} is called without an argument, the vertical spacing is +reset to the previous value before the last call to @code{vs}. The read-only number register @code{.v} contains the current vertical spacing. @@ -7128,7 +7168,7 @@ The @code{als} request can make a macro have more than one name. This would be called as @Example -.vl $Id: groff.texinfo,v 1.71 2001/04/10 12:54:11 wlemb Exp $ +.vl $Id: groff.texinfo,v 1.72 2001/04/13 17:11:32 wlemb Exp $ @endExample @endDefesc @@ -9412,14 +9452,14 @@ file called @file{DESC} and for each font@w{ }@var{f} a font file called@w{ }@file{@var{f}}. @menu -* DESC file format:: -* Font file format:: +* DESC File Format:: +* Font File Format:: @end menu @c --------------------------------------------------------------------- -@node DESC file format, Font file format, Font Files, Font Files -@subsection @file{DESC} file format +@node DESC File Format, Font File Format, Font Files, Font Files +@subsection @file{DESC} File Format @cindex @file{DESC} file format @cindex font description file format @cindex format of font description file @@ -9496,8 +9536,8 @@ in the @file{DESC} file. @c --------------------------------------------------------------------- -@node Font file format, , DESC file format, Font Files -@subsection Font file format +@node Font File Format, , DESC File Format, Font Files +@subsection Font File Format @cindex font file format @cindex format of font files |