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hdf.el
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hdf.el
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;; Better HDF read/write experience in emacs (9/25/09 hzhao@facebook.com)
(require 'font-lock)
(defvar hdf-mode-hook nil)
(add-to-list 'auto-mode-alist '("\\.hdf\\'" . hdf-mode))
(defvar hdf-indent-level 2
"Defines 2 spaces for HDF indentation.")
;; syntax coloring
;; http://www.gnu.org/software/emacs/elisp/html_node/Faces-for-Font-Lock.html
(defconst hdf-font-lock-keywords
(list
'("^[ \t]*\\([\\#\\-]include\\)[ \t]+\\(.*\\)"
(1 font-lock-keyword-face)
(2 font-lock-string-face)) ;; include
'("^[ \t]*#.*$" . font-lock-comment-face) ;; comments
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*\\(!=\\)[ \t]*\\(.*\\)"
(1 font-lock-variable-name-face)
(2 font-lock-function-name-face)) ;; shell commands
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*\\(:=\\)[ \t]*\\([a-z0-9\\.]+\\)[ \t]*$"
(1 font-lock-variable-name-face)
(2 font-lock-function-name-face)
(3 font-lock-variable-name-face)) ;; node copying
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*=[ \t]*\\(true\\|false\\|yes\\|no\\|on\\|off\\)[ \t]*$"
(1 font-lock-variable-name-face)
(2 font-lock-keyword-face)) ;; booleans
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*=[ \t]*\\([0-9]+\\)[ \t]*$"
(1 font-lock-variable-name-face)
(2 font-lock-constant-face)) ;; numbers
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*=[ \t]*\\(.*\\)"
(1 font-lock-variable-name-face)) ;; strings
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*[{=][ \t]*$"
(1 font-lock-variable-name-face)) ;; nodes
'("^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*\\(:\\)[ \t]*\\([a-z0-9\\.]+\\)[ \t]*$"
(1 font-lock-variable-name-face)
(2 font-lock-function-name-face)
(3 font-lock-variable-name-face)) ;; node aliases
'("^[ \t]*\\(@\\)\\([a-z0-9_\\.]+\\)[ \t]*$"
(1 font-lock-function-name-face)
(2 font-lock-variable-name-face)) ;; node inheritance
)
"Hdf Keywords")
;; indentation
(defun hdf-indent-line ()
"Indent current line as HDF code."
(interactive)
(beginning-of-line)
(if (bobp)
(indent-line-to 0)
(progn
(if (looking-at "^[ \t]*}")
(save-excursion
(forward-line -1)
(while (and (not (bobp)) (looking-at "^[ \t]*$"))
(forward-line -1))
(if (looking-at "^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*{")
(setq cur-indent (current-indentation))
(progn
(setq cur-indent (- (current-indentation) hdf-indent-level))
(if (< cur-indent 0)
(indent-line-to 0)))))
(save-excursion
(forward-line -1)
(while (and (not (bobp)) (looking-at "^[ \t]*$"))
(forward-line -1))
(if (looking-at "^[ \t]*\\([a-z0-9_\\.\\*]+\\)[ \t]*{")
(setq cur-indent (+ (current-indentation) hdf-indent-level))
(setq cur-indent (current-indentation)))))
(if cur-indent
(indent-line-to cur-indent)
(indent-line-to 0)))))
(defun hdf-mode ()
"Mode for editing HDF files"
(interactive)
(kill-all-local-variables)
(set (make-local-variable 'font-lock-defaults)
'(hdf-font-lock-keywords nil, 1))
(setq major-mode 'hdf-mode)
(setq mode-name "HDF")
(run-hooks 'hdf-mode-hook)
(set (make-local-variable 'indent-line-function) 'hdf-indent-line)
)
(provide 'hdf-mode)