(ddd.info)Help Helpers

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3.6.2.3 Help Helpers
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DDD relies on a number of external commands, specified via `Edit =>
Preferences => Helpers'.

   To uncompress help texts, you can define a `Uncompress' command:

 -- Resource: uncompressCommand (class UncompressCommand)
     The command to uncompress the built-in DDD manual, the DDD
     license, and the DDD news.  Takes a compressed text from standard
     input and writes the uncompressed text to standard output.  The
     default value is `gzip -d -c'; typical values include `zcat' and
     `gunzip -c'.

   To view WWW pages, you can define a `Web Browser' command:

 -- Resource: wwwCommand (class WWWCommand)
     The command to invoke a WWW browser.  The string `@URL@' is
     replaced by the URL to open.  Default is to try a running Netscape
     first (trying `mozilla', then `netscape'), then `$WWWBROWSER',
     then to invoke a new Netscape process, then to let a running Emacs
     or XEmacs do the job (via `gnudoit'), then to invoke Firefox, then
     to invoke Lynx in an xterm.

     To specify `netscape-6.0' as browser, use the setting:

          Ddd*wwwCommand: \
               netscape-6.0 -remote 'openURL(@URL@)' \
            || netscape-6.0 '@URL@'

     This command first tries to connect to a running `netscape-6.0'
     browser; if this fails, it starts a new `netscape-6.0' process.

   This is the default WWW Page shown by `Help => DDD WWW Page':

 -- Resource: wwwPage (class WWWPage)
     The DDD WWW page.  Value: `http://www.gnu.org/software/ddd/'