SyntaxRange: A Vim Script repository from amagura

This is a mirror of http://www.vim.org/scripts/script.php?script_id=4168

DESCRIPTION
This plugin provides commands and functions to set up regions in the current
buffer that either use a syntax different from the buffer's 'filetype', or
completely ignore the syntax.

SEE ALSO
- If you also want different buffer options (like indent settings, etc.) for
  each syntax region, the OnSyntaxChange.vim plugin (vimscript #4085) allows
  you to dynamically change the buffer options as you move through the buffer.

RELATED WORKS
- If the highlighting doesn't work properly, you could alternatively edit the
  range(s) in a separate scratch buffer. Plugins like NrrwRgn (vimscript #3075)
  provide commands to set these up, with automatic syncing back to the
  original buffer.

SOURCE
The code to include a different syntax in a region is based on
    http://vim.wikia.com/wiki/Different_syntax_highlighting_within_regions_of_a_file

USAGE
For quick, ad-hoc manipulation of the syntax withing a range of lines, the
following commands are provided:

:[range]SyntaxIgnore    Ignore the buffer's filetype syntax for the current
                        line / lines in [range]. (Top-level keywords will
                        still be highlighted.)
                        This can be a useful fix when some text fragments
                        confuse the syntax highlighting. (For example, when
                        buffer syntax set to an inlined here-document is
                        negatively affected by the foreign code surrounding
                        the here-document.)

:[range]SyntaxInclude {filetype}
                        Use the {filetype} syntax for the current line / lines
                        in [range].

                        Line numbers in [range] are fixed; i.e. they do not
                        adapt to inserted / deleted lines. But when in a
                        range, the last line ($) is interpreted as "end of
                        file".

For finer control and use in custom mappings or syntax tweaks, the following
functions can be used. You'll find the details directly in the
.vim/autoload/SyntaxRange.vim implementation file.

SyntaxRange#Include( startPattern, endPattern, filetype, ... )
                        Use the {filetype} syntax for the region defined by
                        {startPattern} and {endPattern}.
SyntaxRange#IncludeEx( regionDefinition, filetype )
                        Use the {filetype} syntax for the region defined by
                        {regionDefinition}.

EXAMPLE
To highlight the text between the markers
    @begin=c@
    int i = 42;
    @end=c@
with C syntax, and make the markers themselves fade into the background:
    :call SyntaxRange#Include('@begin=c@', '@end=c@', 'c', 'NonText')

To highlight inline patches inside emails:
    :call SyntaxRange#IncludeEx('start="^changeset\|^Index: \|^diff \|^--- .*\%( ----\)\@<!$" skip="^[-+@       ]" end="^$"', 'diff')
To install this automatically for the "mail" filetype, put above line into a
script in ~/.vim/after/syntax/mail/SyntaxInclude.vim
amagura/SyntaxRange
