Takeshi Banse 0948c3d676 Introduce _zsh_add-highlighter. ...

For easily extending the highlighting behavior, split the
actual highlighting function into some pieces.

For example "_zsh_main-highlight" transformed into,

1) An actual highlighting function which updates the
`region_highlight` on its own. (_zsh_main-highlight)
2) A predicate which determines whether its highlighting function
(in this case `_zsh_main-highlight`) should be called or not.
(_zsh_buffer-modified-p)

Likewise, `_zsh_highlight-bracket-match` and
`_zsh_highlight-bracket-match-p` are born.

Eventually, `_zsh_highlight-zle-buffer` coordinates above these
functions and maintain some internal state variables.

Finally, added `_zsh_add-highlighter` a little syntactic-sugar-ish
function to register the highlighting functions in an appropriate manner.

Signed-off-by: Takeshi Banse <takebi@laafc.net>

2011-01-16 20:32:53 +09:00

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