thrift.el

   1 (require 'font-lock)
   2
   3 (defvar thrift-mode-hook nil)
   4 (add-to-list 'auto-mode-alist '("\\.thrift\\'" . thrift-mode))
   5
   6 (defvar thrift-indent-level 2
   7   "Defines 2 spaces for thrift indentation.")
   8
   9 ;; syntax coloring
  10 (defconst thrift-font-lock-keywords
  11   (list
  12    '("#.*$" . font-lock-comment-face)  ;; perl style comments
  13    '("\\<\\(include\\|struct\\|exception\\|typedef\\|cpp_namespace\\|java_package\\|cocoa_prefix\\|php_namespace\\|ruby_namespace\\|py_module\\|perl_package\\|const\\|enum\\|service\\|extends\\|void\\|async\\|throws\\|optional\\|required\\)\\>" . font-lock-keyword-face)  ;; keywords
  14    '("\\<\\(bool\\|byte\\|i16\\|i32\\|i64\\|double\\|string\\|binary\\|map\\|list\\|set\\)\\>" . font-lock-type-face)  ;; built-in types
  15    '("\\<\\([0-9]+\\)\\>" . font-lock-variable-name-face)   ;; ordinals
  16    '("\\<\\(\\w+\\)\\s-*(" (1 font-lock-function-name-face))  ;; functions
  17    )
  18   "Thrift Keywords")
  19
  20 ;; indentation
  21 (defun thrift-indent-line ()
  22   "Indent current line as Thrift code."
  23   (interactive)
  24   (beginning-of-line)
  25   (if (bobp)
  26       (indent-line-to 0)
  27     (let ((not-indented t) cur-indent)
  28       (if (looking-at "^[ \t]*\\(}\\|throws\\)")
  29           (if (looking-at "^[ \t]*}")
  30               (progn
  31                 (save-excursion
  32                   (forward-line -1)
  33                   (setq cur-indent (- (current-indentation) thrift-indent-level)))
  34                 (if (< cur-indent 0)
  35                     (setq cur-indent 0)))
  36             (progn
  37               (save-excursion
  38                 (forward-line -1)
  39                 (if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*(")
  40                     (setq cur-indent (+ (current-indentation) thrift-indent-level))
  41                   (setq cur-indent (current-indentation))))))
  42         (save-excursion
  43           (while not-indented
  44             (forward-line -1)
  45             (if (looking-at "^[ \t]*}")
  46                 (progn
  47                   (setq cur-indent (current-indentation))
  48                   (setq not-indented nil))
  49               (if (looking-at "^.*{[^}]*$")
  50                   (progn
  51                     (setq cur-indent (+ (current-indentation) thrift-indent-level))
  52                     (setq not-indented nil))
  53                 (if (bobp)
  54                     (setq not-indented nil)))
  55               (if (looking-at "^[ \t]*throws")
  56                   (progn
  57                     (setq cur-indent (- (current-indentation) thrift-indent-level))
  58                     (if (< cur-indent 0)
  59                         (setq cur-indent 0))
  60                     (setq not-indented nil))
  61                 (if (bobp)
  62                     (setq not-indented nil)))
  63               (if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*([^)]*$")
  64                   (progn
  65                     (setq cur-indent (+ (current-indentation) thrift-indent-level))
  66                     (setq not-indented nil))
  67                 (if (bobp)
  68                     (setq not-indented nil)))
  69               (if (looking-at "^[ \t]*\\/\\*")
  70                   (progn
  71                     (setq cur-indent (+ (current-indentation) 1))
  72                     (setq not-indented nil))
  73                 (if (bobp)
  74                     (setq not-indented nil)))
  75               (if (looking-at "^[ \t]*\\*\\/")
  76                   (progn
  77                     (setq cur-indent (- (current-indentation) 1))
  78                     (setq not-indented nil))
  79                 (if (bobp)
  80                     (setq not-indented nil)))
  81               ))))
  82       (if cur-indent
  83           (indent-line-to cur-indent)
  84         (indent-line-to 0)))))
  85
  86 ;; C/C++ comments; also allowing underscore in words
  87 (defvar thrift-mode-syntax-table
  88   (let ((thrift-mode-syntax-table (make-syntax-table)))
  89     (modify-syntax-entry ?_ "w" thrift-mode-syntax-table)
  90     (modify-syntax-entry ?/ ". 124b" thrift-mode-syntax-table)
  91     (modify-syntax-entry ?* ". 23" thrift-mode-syntax-table)
  92     (modify-syntax-entry ?\n "> b" thrift-mode-syntax-table)
  93     thrift-mode-syntax-table)
  94   "Syntax table for thrift-mode")
  95
  96 (defun thrift-mode ()
  97   "Mode for editing Thrift files"
  98   (interactive)
  99   (kill-all-local-variables)
 100   (set-syntax-table thrift-mode-syntax-table)
 101   (set (make-local-variable 'font-lock-defaults) '(thrift-font-lock-keywords))
 102   (setq major-mode 'thrift-mode)
 103   (setq mode-name "Thrift")
 104   (run-hooks 'thrift-mode-hook)
 105   (set (make-local-variable 'indent-line-function) 'thrift-indent-line)
 106   )
 107 (provide 'thrift-mode)