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;;
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;; Licensed to the Apache Software Foundation (ASF) under one
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;; or more contributor license agreements. See the NOTICE file
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;; distributed with this work for additional information
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;; regarding copyright ownership. The ASF licenses this file
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;; to you under the Apache License, Version 2.0 (the
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;; "License"); you may not use this file except in compliance
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;; with the License. You may obtain a copy of the License at
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;;
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;; http://www.apache.org/licenses/LICENSE-2.0
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;;
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;; Unless required by applicable law or agreed to in writing,
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;; software distributed under the License is distributed on an
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;; "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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;; KIND, either express or implied. See the License for the
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;; specific language governing permissions and limitations
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;; under the License.
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;;
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(require 'font-lock)
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(defvar thrift-mode-hook nil)
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(add-to-list 'auto-mode-alist '("\\.thrift\\'" . thrift-mode))
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(defvar thrift-indent-level 2
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"Defines 2 spaces for thrift indentation.")
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;; syntax coloring
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(defconst thrift-font-lock-keywords
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(list
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'("#.*$" . font-lock-comment-face) ;; perl style comments
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'("\\<\\(include\\|struct\\|exception\\|typedef\\|const\\|enum\\|service\\|extends\\|void\\|oneway\\|throws\\|optional\\|required\\)\\>" . font-lock-keyword-face) ;; keywords
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'("\\<\\(bool\\|byte\\|i16\\|i32\\|i64\\|double\\|string\\|binary\\|map\\|list\\|set\\)\\>" . font-lock-type-face) ;; built-in types
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'("\\<\\([0-9]+\\)\\>" . font-lock-variable-name-face) ;; ordinals
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'("\\<\\(\\w+\\)\\s-*(" (1 font-lock-function-name-face)) ;; functions
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)
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"Thrift Keywords")
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;; indentation
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(defun thrift-indent-line ()
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"Indent current line as Thrift code."
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(interactive)
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(beginning-of-line)
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(if (bobp)
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(indent-line-to 0)
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(let ((not-indented t) cur-indent)
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(if (looking-at "^[ \t]*\\(}\\|throws\\)")
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(if (looking-at "^[ \t]*}")
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(progn
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(save-excursion
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(forward-line -1)
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(setq cur-indent (- (current-indentation) thrift-indent-level)))
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(if (< cur-indent 0)
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(setq cur-indent 0)))
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(progn
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(save-excursion
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(forward-line -1)
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(if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*(")
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(setq cur-indent (+ (current-indentation) thrift-indent-level))
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(setq cur-indent (current-indentation))))))
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(save-excursion
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(while not-indented
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(forward-line -1)
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(if (looking-at "^[ \t]*}")
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(progn
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(setq cur-indent (current-indentation))
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(setq not-indented nil))
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(if (looking-at "^.*{[^}]*$")
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(progn
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(setq cur-indent (+ (current-indentation) thrift-indent-level))
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(setq not-indented nil))
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(if (bobp)
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(setq not-indented nil)))
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(if (looking-at "^[ \t]*throws")
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(progn
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(setq cur-indent (- (current-indentation) thrift-indent-level))
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(if (< cur-indent 0)
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(setq cur-indent 0))
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(setq not-indented nil))
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(if (bobp)
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(setq not-indented nil)))
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(if (looking-at "^[ \t]*[\\.<>[:word:]]+[ \t]+[\\.<>[:word:]]+[ \t]*([^)]*$")
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(progn
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(setq cur-indent (+ (current-indentation) thrift-indent-level))
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(setq not-indented nil))
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(if (bobp)
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(setq not-indented nil)))
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(if (looking-at "^[ \t]*\\/\\*")
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(progn
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(setq cur-indent (+ (current-indentation) 1))
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(setq not-indented nil))
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(if (bobp)
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(setq not-indented nil)))
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(if (looking-at "^[ \t]*\\*\\/")
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(progn
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(setq cur-indent (- (current-indentation) 1))
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(setq not-indented nil))
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(if (bobp)
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(setq not-indented nil)))
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))))
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(if cur-indent
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(indent-line-to cur-indent)
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(indent-line-to 0)))))
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;; C/C++ comments; also allowing underscore in words
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(defvar thrift-mode-syntax-table
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(let ((thrift-mode-syntax-table (make-syntax-table)))
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(modify-syntax-entry ?_ "w" thrift-mode-syntax-table)
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(modify-syntax-entry ?/ ". 1456" thrift-mode-syntax-table)
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(modify-syntax-entry ?* ". 23" thrift-mode-syntax-table)
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(modify-syntax-entry ?\n "> b" thrift-mode-syntax-table)
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thrift-mode-syntax-table)
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"Syntax table for thrift-mode")
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(defun thrift-mode ()
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"Mode for editing Thrift files"
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(interactive)
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(kill-all-local-variables)
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(set-syntax-table thrift-mode-syntax-table)
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(set (make-local-variable 'font-lock-defaults) '(thrift-font-lock-keywords))
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(setq major-mode 'thrift-mode)
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(setq mode-name "Thrift")
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(run-hooks 'thrift-mode-hook)
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(set (make-local-variable 'indent-line-function) 'thrift-indent-line)
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)
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(provide 'thrift-mode)
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