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    Text::Diff::HTML - XHTML format for Text::Diff::Unified

        use Text::Diff;

        my $diff = diff "file1.txt", "file2.txt", { STYLE => 'Text::Diff::HTML' };
        my $diff = diff \$string1,   \$string2,   { STYLE => 'Text::Diff::HTML' };
        my $diff = diff \*FH1,       \*FH2,       { STYLE => 'Text::Diff::HTML' };
        my $diff = diff \&reader1,   \&reader2,   { STYLE => 'Text::Diff::HTML' };
        my $diff = diff \@records1,  \@records2,  { STYLE => 'Text::Diff::HTML' };
        my $diff = diff \@records1,  "file.txt",  { STYLE => 'Text::Diff::HTML' };

    This class subclasses Text::Diff::Unified, a formatting class provided
    by the Text::Diff module, to add XHTML markup to the unified diff
    format. For details on the interface of the "diff()" function, see the
    Text::Diff documentation.

    In the XHTML formatted by this module, the contents of the diff returned
    by "diff()" are wrapped in a "<div>" element, as is each hunk of the
    diff. Within each hunk, all content is properly HTML encoded using
    HTML::Entities, and the various sections of the diff are marked up with
    the appropriate XHTML elements. The elements used are as follows:

    *   "<div class="file">"

        This element contains the entire contents of the diff "file"
        returned by "diff()". All of the following elements are subsumed by
        this one.

        *   "<span class="fileheader">"

            The header section for the files being "diff"ed, usually
            something like:

              --- in.txt    Thu Sep  1 12:51:03 2005
              +++ out.txt   Thu Sep  1 12:52:12 2005

            This element immediately follows the opening "file" "<div>"

        *   "<div class="hunk">"

            This element contains a single diff "hunk". Each hunk may
            contain the following elements:

            *   "<span class="hunkheader">"

                Header for a diff hunk. The hunk header is usually something

                  @@ -1,5 +1,7 @@

                This element immediately follows the opening "hunk" "<div>"

            *   "<span class="ctx">"

                Context around the important part of a "diff" hunk. These
                are contents that have *not* changed between the files being

            *   "<ins>"

                Inserted content, each line starting with "+".

            *   "<del>"

                Deleted content, each line starting with "-".

            *   "<span class="hunkfooter">"

                The footer section of a hunk; contains no contents.

        *   "<span class="filefooter">"

            The footer section of a file; contains no contents.

    You may do whatever you like with these elements and classes; I highly
    recommend that you style them using CSS. You'll find an example CSS file
    in the eg directory in the Text-Diff-HTML distribution. You will also
    likely want to wrap the output of your diff in its own element (a
    "<div>" will do) styled with "white-space: pre".

See Also

    This module is stored in an open repository at the following address:


    Patches against Text::Diff::HTML are welcome. Please send bug reports to

    David Wheeler <>

Copyright and License
    Copyright (c) 2005-2009 Kineticode, Inc. Some Rights Reserved.

    This module is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.

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