Provided by: groff_1.22.4-3_amd64 bug

NAME

       groff_www - groff macros for authoring web pages

SYNOPSIS

       groff -m www [option ...] [input-file ...]

DESCRIPTION

       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
       .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 input.

REQUESTS

       .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 ⟨http://foo.org/⟩:

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

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

                     foo ⟨http://foo.org⟩:

              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 ⟨joe@user.org⟩ can be achieved by the
              following macro:

                     .MTO joe@user.org "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 is the location of the GNU FTP server ⟨ftp://ftp.gnu.org/⟩.  The
              macro example above can be specified as:

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

       .TAG name
              Generates an HTML name tag from its argument.  This can then be referenced using
              the URL ⟨#URL⟩ 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:

                     .TP
                     .B URL
                     generates
                     .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 macro.

       .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
                     .HR
                     GNU Troff
                     .URL http://groff.ffii.org (Groff)
                      a
                     .URL http://www.gnu.org/ GNU
                     project.
                     Hosted by
                     .URL http://ffii.org/ FFII .
                     .HR
                     .HnE

              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"" \
                       href=""http://foo.org//bar.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 LINKSTYLE.

SECTION HEADING LINKS

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

LIMITATIONS OF GROHTML

       tbl information is currently rendered as a PNG image.

FILES

       /usr/share/groff/1.22.4/tmac/www.tmac

AUTHORS

       The www macro package was written by Gaius Mulley ⟨gaius@glam.ac.uk⟩, with additions by
       Werner Lemberg ⟨wl@gnu.org⟩ and Bernd Warken ⟨groff-bernd.warken-72@web.de⟩.

SEE ALSO

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