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;;; thrift.el --- Major mode for Apache Thrift files
;; Keywords: files
;; Licensed to the Apache Software Foundation (ASF) under one
;; or more contributor license agreements. See the NOTICE file
;; distributed with this work for additional information
;; regarding copyright ownership. The ASF licenses this file
;; to you under the Apache License, Version 2.0 (the
;; "License"); you may not use this file except in compliance
;; with the License. You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing,
;; software distributed under the License is distributed on an
;; "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
;; KIND, either express or implied. See the License for the
;; specific language governing permissions and limitations
;; under the License.
;;
;;; Commentary:
;;
;;; Code:
(require 'font-lock)
(defvar thrift-mode-hook nil)
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.thrift\\'" . thrift-mode))
(defvar thrift-indent-level 2
"Defines 2 spaces for thrift indentation.")
;; syntax coloring
(defconst thrift-font-lock-keywords
(list
'("\\<\\(include\\|struct\\|exception\\|typedef\\|const\\|enum\\|service\\|extends\\|void\\|oneway\\|throws\\|optional\\|required\\)\\>" . font-lock-keyword-face) ;; keywords
'("\\<\\(bool\\|byte\\|i16\\|i32\\|i64\\|double\\|string\\|binary\\|map\\|list\\|set\\)\\>" . font-lock-type-face) ;; built-in types
'("\\<\\([0-9]+\\)\\>" . font-lock-variable-name-face) ;; ordinals
'("\\<\\(\\w+\\)\\s-*(" (1 font-lock-function-name-face)) ;; functions
)
"Thrift Keywords.")
;; indentation
(defun thrift-indent-line ()
"Indent current line as Thrift code."
(interactive)
(beginning-of-line)
(if (bobp)
(indent-line-to 0)
(let ((not-indented t) cur-indent)
(if (looking-at "^[ \t]*\\(}\\|throws\\)")
(if (looking-at "^[ \t]*}")
(progn
(save-excursion
(forward-line -1)
(setq cur-indent (- (current-indentation) thrift-indent-level)))
(if (< cur-indent 0)
(setq cur-indent 0)))
(progn
(save-excursion
(forward-line -1)
(if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*(")
(setq cur-indent (+ (current-indentation) thrift-indent-level))
(setq cur-indent (current-indentation))))))
(save-excursion
(while not-indented
(forward-line -1)
(if (looking-at "^[ \t]*}")
(progn
(setq cur-indent (current-indentation))
(setq not-indented nil))
(if (looking-at "^.*{[^}]*$")
(progn
(setq cur-indent (+ (current-indentation) thrift-indent-level))
(setq not-indented nil))
(if (bobp)
(setq not-indented nil)))
(if (looking-at "^[ \t]*throws")
(progn
(setq cur-indent (- (current-indentation) thrift-indent-level))
(if (< cur-indent 0)
(setq cur-indent 0))
(setq not-indented nil))
(if (bobp)
(setq not-indented nil)))
(if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*([^)]*$")
(progn
(setq cur-indent (+ (current-indentation) thrift-indent-level))
(setq not-indented nil))
(if (bobp)
(setq not-indented nil)))
(if (looking-at "^[ \t]*\\/\\*")
(progn
(setq cur-indent (+ (current-indentation) 1))
(setq not-indented nil))
(if (bobp)
(setq not-indented nil)))
(if (looking-at "^[ \t]*\\*\\/")
(progn
(setq cur-indent (- (current-indentation) 1))
(setq not-indented nil))
(if (bobp)
(setq not-indented nil)))
))))
(if cur-indent
(indent-line-to cur-indent)
(indent-line-to 0)))))
;; C/C++- and sh-style comments; also allowing underscore in words
(defvar thrift-mode-syntax-table
(let ((thrift-mode-syntax-table (make-syntax-table)))
(modify-syntax-entry ?_ "w" thrift-mode-syntax-table)
(modify-syntax-entry ?# "<" thrift-mode-syntax-table) ; sh-style comments
(modify-syntax-entry ?/ ". 124" thrift-mode-syntax-table) ; c/c++-style comments
(modify-syntax-entry ?* ". 23b" thrift-mode-syntax-table)
(modify-syntax-entry ?\n ">" thrift-mode-syntax-table)
thrift-mode-syntax-table)
"Syntax table for thrift-mode")
;;;###autoload
(defun thrift-mode ()
"Mode for editing Thrift files."
(interactive)
(kill-all-local-variables)
(set-syntax-table thrift-mode-syntax-table)
(set (make-local-variable 'font-lock-defaults) '(thrift-font-lock-keywords))
(setq major-mode 'thrift-mode)
(setq mode-name "Thrift")
(run-hooks 'thrift-mode-hook)
(set (make-local-variable 'indent-line-function) 'thrift-indent-line)
)
(provide 'thrift)
;;; thrift.el ends here
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