GROFF_WWW(7)          Miscellaneous Information Manual          GROFF_WWW(7)

NAME         top

       groff_www - groff macros for authoring web pages

SYNOPSIS         top

       groff -mwww [ options ] file ...

DESCRIPTION         top

       This manual page describes the GNU -mwww macro package, which is part
       of the groff document formatting system.  The manual page is very a
       basic guide, and the HTML device driver (grohtml) has been completely
       rewritten but still remains as in an alpha state.  It has been
       included into the distribution so that a lot of people have a chance
       to test it.  Note that this macro file is automatically called (via
       the troffrc file) if you use -Thtml or -Txhtml.

       To see the hyperlinks in action, please format this man page with the
       grohtml device.

       Here is a summary of the functions found in this macro set.

       .JOBNAME     split output into multiple files
       .HX          automatic heading level cut off
       .BCL         specify colours on a web page
       .BGIMG       specify background image
       .URL         create a URL using two parameters
       .FTP         create an FTP reference
       .MTO         create an HTML email address
       .FTP         create an FTP reference
       .TAG         generate an HTML name
       .IMG         include an image file
       .PIMG        include PNG image
       .MPIMG       place PNG on the margin and wrap text around it
       .HnS         begin heading
       .HnE         end heading
       .LK          emit automatically collected links.
       .HR          produce a horizontal rule
       .NHR         suppress automatic generation of rules.
       .HTL         only generate HTML title
       .HEAD        add data to <head> block
       .ULS         unorder list begin
       .ULE         unorder list end
       .OLS         ordered list begin
       .OLE         ordered list end
       .DLS         definition list begin
       .DLE         definition list end
       .LI          insert a list item
       .DC          generate a drop capital
       .HTML        pass an HTML raw request to the device driver
       .CDS         code example begin
       .CDE         code example end
       .ALN         place links on left of main text.
       .LNS         start a new two-column table with links in the left.
       .LNE         end the two-column table.
       .LINKSTYLE   initialize default URL attributes.

       Output of the pic, eqn, refer, and tbl preprocessors is acceptable as

REQUESTS         top

       .JOBNAME filename
              Split output into multiple HTML files.  A file is split
              whenever a .SH or .NH 1 is encountered.  Its argument is the
              file stem name for future output files.  This option is
              equivalent to grohtml's -j option.

       .HX n  Specify the cut off depth when generating links from section
              headings.  For example, a parameter of 2 would cause grohtml
              to generate a list of links for .NH 1 and .NH 2 but not for
              .NH 3.  Whereas

                     .HX 0

              tells grohtml that no heading links should be created at all.
              Another method for turning automatic headings off is by
              issuing the command-line switch -P-l to groff.

       .BCL foreground background active not-visited visited
              This macro takes five parameters: foreground, background,
              active hypertext link, hypertext link not yet visited, and
              visited hypertext link colour.

       .BGIMG imagefile
              the only parameter to this macro is the background image file.

       .URL url [description] [after]
              generates a URL using either one, two or three arguments.  The
              first parameter is the actual URL, the second is the name of
              the link, and the third is optional stuff to be printed
              immediately afterwards.  If description and after are absent
              then the URL becomes the anchor text.  Hyphenation is disabled
              while printing the actual URL; explicit breakpoints should be
              inserted with the \: escape.  Here is how to encode foo 

                     .URL http://\:foo.\:org/ foo :

              If this is processed by a device other than -Thtml or  -Txhtml
              it appears as:

                     foo ⟨⟩:

              The URL macro can be of any type; for example we can reference
              Eric Raymond's pic guide ⟨pic.html⟩ by:

                     .URL pic.html "Eric Raymond's pic guide"

       .MTO address [description] [after]
              Generate an email  HTML  reference.   The  first  argument  is
              mandatory  as the email address.  The optional second argument
              is the text you see in your browser.  If an empty argument  is
              given, address is used instead.  An optional third argument is
              stuff printed immediately afterwards.  Hyphenation is disabled
              while  printing  the  actual  email address.  For example, Joe
              User ⟨⟩ was achieved by the following macro:

                     .MTO "Joe User"

              Note that all the URLs actually are treated  as  consuming  no
              textual  space  in  groff.   This could be considered as a bug
              since it causes some problems.  To circumvent  this,  www.tmac
              inserts  a  zero-width  character  which expands to a harmless
              space (only if run with -Thtml or -Txhtml).

       .FTP url [description] [after]
              indicates that data  can  be  obtained  via  FTP.   The  first
              argument  is  the  URL  and the second is the browser text.  A
              third argument, similar to the macros above, is  intended  for
              stuff  printed  immediately  afterwards.   The  second and the
              third parameter are optional.  Hyphenation is  disabled  while
              printing  the actual URL.  As an example, here the location of
              the GNU FTP server ⟨⟩.   The  macro  example
              above was specified by:

                     .FTP ftp://\ "GNU FTP server" .

       .TAG name
              Generates  an  HTML name tag from its argument.  This can then
              be referenced using the URL ⟨2⟩ macro.  As you  can  see,  you
              must  precede  the  tag  name  with  #  since  it  is  a local
              reference.  This link was achieved via placing a  TAG  in  the
              URL description above; the source looks like this:

                     .B URL
                     .TAG URL
                     a URL using either two or three arguments.

       .IMG [-R|-L|-C] filename [width] [height]
              Include  a  picture  into the document.  The first argument is
              the horizontal location: right, left, or center  (-R,  -L,  or
              -C).   Alignment  is  centered  by  default  (-C).  The second
              argument is the  filename.   The  optional  third  and  fourth
              arguments are the width and height.  If the width is absent it
              defaults to 1 inch.  If the height is absent  it  defaults  to
              the  width.   This  maps  onto  an  HTML  img tag.  If you are
              including a PNG image then it is advisable  to  use  the  PIMG

       .PIMG [-R|-L|-C] filename [width [height]]
              Include  an image in PNG format.  This macro takes exactly the
              same parameters as the IMG macro;  it  has  the  advantage  of
              working  with  PostScript  and  HTML devices also since it can
              automatically convert the image into the EPS format, using the
              following  programs  of the netpbm package: pngtopnm, pnmcrop,
              and pnmtops.  If the document isn't processed with  -Thtml  or
              -Txhtml it is necessary to use the -U option of groff.

       .MPIMG [-R|-L] [-G gap] filename [width [height]]
              Place  a PNG image on the margin and wrap text around it.  The
              first parameters are optional.  The alignment: left  or  right
              (-L  or  -R)  specifies the margin where the picture is placed
              at.  The default alignment is left (-L).  Optionally,  -G  gap
              can  be used to arrange a gap between the picture and the text
              that wraps around it.  The default gap width is zero.
              The first non-optional argument is the filename.  The optional
              following arguments are the width and height.  If the width is
              absent it defaults to 1 inch.  If  the  height  is  absent  it
              defaults to the width.  Example:

                     .MPIMG -L -G 2c foo.png 3c 1.5c

              The  height  and  width may also be given as percentages.  The
              PostScript device calculates the width from  the  .l  register
              and the height from the .p register.  For example:

                     .MPIMG -L -G 2c foo.png 15%

       .HnS n Begin  heading.   The  numeric heading level n is specified by
              the first parameter.  Use this macro if your headings  contain
              URL, FTP or MTO macros.  Example:

                     .HnS 1
                     GNU Troff
                     .URL (Groff)
                     — a
                     .URL GNU
                     Hosted by
                     .URL FFII .

              In  this  case  you  might  wish to disable automatic links to
              headings.  This can be done via -P-l from the command line.

       .HnE   End heading.

       .LK    Force grohtml to place the automatically  generated  links  at
              this  position.   If  this manual page has been processed with
              -Thtml or -Txhtml those links can be seen right here.

       .HR    Generate a full-width horizontal rule for -Thtml and  -Txhtml.
              No effect for all other devices.

       .NHR   Suppress  generation of the top and bottom rules which grohtml
              emits by default.

       .HTL   Generate an HTML title only.  This differs from the  TL  macro
              of the ms macro package which generates both an HTML title and
              an <H1> heading.  Use it to provide an HTML  title  as  search
              engine  fodder but a graphic title in the document.  The macro
              terminates when a space or break is seen (.sp, .br).

       .HEAD  Add arbitrary HTML data to the <head> block.  Ignored  if  not
              processed with -Thtml or -Txhtml.  Example:

                     .HEAD "<link \
                       rel=""icon"" \
                       type=""image/png"" \

       .HTML  All  text  after  this  macro  is treated as raw HTML.  If the
              document is processed without -Thtml or -Txhtml then the macro
              is  ignored.   Internally,  this  macro  is used as a building
              block for other higher-level macros.

              For example, the BGIMG macro is defined as

                     .de BGIMG
                     .   HTML <body background=\\$1>

       .DC l text [color]
              Produce a drop capital.  The first parameter is the letter  to
              be  dropped  and  enlarged,  the  second parameter text is the
              adjoining text  whose  height  the  first  letter  should  not
              exceed.   The  optional  third  parameter  is the color of the
              dropped letter.  It defaults to black.

       .CDS   Start displaying a code section in constant width font.

       .CDE   End code display

       .ALN [color] [percentage]
              Place section heading links automatically to the left  of  the
              main  text.   The  color  argument  is optional and if present
              indicates which HTML background color is to be used under  the
              links.   The optional percentage indicates the amount of width
              to devote to displaying the links.   The  default  values  are
              #eeeeee  and  30 for color and percentage width, respectively.
              This macro should only be called once at the beginning of  the
              document.  After calling this macro each section heading emits
              an HTML table consisting of the links  in  the  left  and  the
              section text on the right.

       .LNS   Start  a  new  two-column table with links in the left column.
              This can be called if the document has text before  the  first
              .SH and if .ALN is used.  Typically this is called just before
              the first paragraph and after the main title as  it  indicates
              that  text  after this point should be positioned to the right
              of the left-hand navigational links.

       .LNE   End a two-column table.  This should be called at the  end  of
              the document if .ALN was used.

       .LINKSTYLE color [ fontstyle [ openglyph closeglyph ] ]
              Initialize default URL attributes to be used if this macro set
              is not used with the HTML device.  The macro  set  initializes
              itself with the following call

                     .LINKSTYLE blue CR \[la] \[ra]

              but  these  values  will  be  superseded  by  a  user  call to


       By default grohtml generates links to all section headings and places
       these at the top of the HTML document.  (See LINKS ⟨2⟩ for details of
       how to switch this off or alter the position).


       tbl information is currently rendered as a PNG image.

FILES         top


BUGS         top

       Report bugs to the Groff Bug Mailing List ⟨⟩.
       Include a complete, self-contained example that will allow the bug to
       be reproduced, and say which version of groff you are using.

AUTHORS         top

       The www macro package was written by Gaius Mulley ⟨⟩,
       with additions by Werner Lemberg ⟨⟩ and Bernd Warken

SEE ALSO         top

       groff(1), troff(1) grohtml(1), netpbm(1)

COLOPHON         top

       This page is part of the groff (GNU troff) project.  Information
       about the project can be found at 
       ⟨⟩.  If you have a bug report for
       this manual page, see ⟨⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨⟩ on 2018-10-29.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2018-10-25.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to

Groff Version 1.22.3          24 November 2017                  GROFF_WWW(7)

Pages that refer to this page: groff(1)groff_tmac(5)man(7)