Index: third_party/protobuf/editors/protobuf-mode.el |
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+;;; protobuf-mode.el --- major mode for editing protocol buffers. |
+ |
+;; Author: Alexandre Vassalotti <alexandre@peadrop.com> |
+;; Created: 23-Apr-2009 |
+;; Version: 0.3 |
+;; Keywords: google protobuf languages |
+ |
+;; Redistribution and use in source and binary forms, with or without |
+;; modification, are permitted provided that the following conditions are |
+;; met: |
+;; |
+;; * Redistributions of source code must retain the above copyright |
+;; notice, this list of conditions and the following disclaimer. |
+;; * Redistributions in binary form must reproduce the above |
+;; copyright notice, this list of conditions and the following disclaimer |
+;; in the documentation and/or other materials provided with the |
+;; distribution. |
+;; * Neither the name of Google Inc. nor the names of its |
+;; contributors may be used to endorse or promote products derived from |
+;; this software without specific prior written permission. |
+;; |
+;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+;; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ |
+;;; Commentary: |
+ |
+;; Installation: |
+;; - Put `protobuf-mode.el' in your Emacs load-path. |
+;; - Add this line to your .emacs file: |
+;; (require 'protobuf-mode) |
+;; |
+;; You can customize this mode just like any mode derived from CC Mode. If |
+;; you want to add customizations specific to protobuf-mode, you can use the |
+;; `protobuf-mode-hook'. For example, the following would make protocol-mode |
+;; use 2-space indentation: |
+;; |
+;; (defconst my-protobuf-style |
+;; '((c-basic-offset . 2) |
+;; (indent-tabs-mode . nil))) |
+;; |
+;; (add-hook 'protobuf-mode-hook |
+;; (lambda () (c-add-style "my-style" my-protobuf-style t))) |
+;; |
+;; Refer to the documentation of CC Mode for more information about |
+;; customization details and how to use this mode. |
+;; |
+;; TODO: |
+;; - Make highlighting for enum values work properly. |
+;; - Fix the parser to recognize extensions as identifiers and not |
+;; as casts. |
+;; - Improve the parsing of option assignment lists. For example: |
+;; optional int32 foo = 1 [(my_field_option) = 4.5]; |
+;; - Add support for fully-qualified identifiers (e.g., with a leading "."). |
+ |
+;;; Code: |
+ |
+(require 'cc-mode) |
+ |
+(eval-when-compile |
+ (require 'cc-langs) |
+ (require 'cc-fonts)) |
+ |
+;; This mode does not inherit properties from other modes. So, we do not use |
+;; the usual `c-add-language' function. |
+(eval-and-compile |
+ (put 'protobuf-mode 'c-mode-prefix "protobuf-")) |
+ |
+;; The following code uses of the `c-lang-defconst' macro define syntactic |
+;; features of protocol buffer language. Refer to the documentation in the |
+;; cc-langs.el file for information about the meaning of the -kwds variables. |
+ |
+(c-lang-defconst c-primitive-type-kwds |
+ protobuf '("double" "float" "int32" "int64" "uint32" "uint64" "sint32" |
+ "sint64" "fixed32" "fixed64" "sfixed32" "sfixed64" "bool" |
+ "string" "bytes" "group")) |
+ |
+(c-lang-defconst c-modifier-kwds |
+ protobuf '("required" "optional" "repeated")) |
+ |
+(c-lang-defconst c-class-decl-kwds |
+ protobuf '("message" "enum" "service")) |
+ |
+(c-lang-defconst c-constant-kwds |
+ protobuf '("true" "false")) |
+ |
+(c-lang-defconst c-other-decl-kwds |
+ protobuf '("package" "import")) |
+ |
+(c-lang-defconst c-other-kwds |
+ protobuf '("default" "max")) |
+ |
+(c-lang-defconst c-identifier-ops |
+ ;; Handle extended identifiers like google.protobuf.MessageOptions |
+ protobuf '((left-assoc "."))) |
+ |
+;; The following keywords do not fit well in keyword classes defined by |
+;; cc-mode. So, we approximate as best we can. |
+ |
+(c-lang-defconst c-type-list-kwds |
+ protobuf '("extensions" "to" "reserved")) |
+ |
+(c-lang-defconst c-typeless-decl-kwds |
+ protobuf '("extend" "rpc" "option" "returns")) |
+ |
+ |
+;; Here we remove default syntax for loops, if-statements and other C |
+;; syntactic features that are not supported by the protocol buffer language. |
+ |
+(c-lang-defconst c-brace-list-decl-kwds |
+ ;; Remove syntax for C-style enumerations. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-block-stmt-1-kwds |
+ ;; Remove syntax for "do" and "else" keywords. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-block-stmt-2-kwds |
+ ;; Remove syntax for "for", "if", "switch" and "while" keywords. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-simple-stmt-kwds |
+ ;; Remove syntax for "break", "continue", "goto" and "return" keywords. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-paren-stmt-kwds |
+ ;; Remove special case for the "(;;)" in for-loops. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-label-kwds |
+ ;; Remove case label syntax for the "case" and "default" keywords. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-before-label-kwds |
+ ;; Remove special case for the label in a goto statement. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-cpp-matchers |
+ ;; Disable all the C preprocessor syntax. |
+ protobuf nil) |
+ |
+(c-lang-defconst c-decl-prefix-re |
+ ;; Same as for C, except it does not match "(". This is needed for disabling |
+ ;; the syntax for casts. |
+ protobuf "\\([\{\};,]+\\)") |
+ |
+ |
+;; Add support for variable levels of syntax highlighting. |
+ |
+(defconst protobuf-font-lock-keywords-1 (c-lang-const c-matchers-1 protobuf) |
+ "Minimal highlighting for protobuf-mode.") |
+ |
+(defconst protobuf-font-lock-keywords-2 (c-lang-const c-matchers-2 protobuf) |
+ "Fast normal highlighting for protobuf-mode.") |
+ |
+(defconst protobuf-font-lock-keywords-3 (c-lang-const c-matchers-3 protobuf) |
+ "Accurate normal highlighting for protobuf-mode.") |
+ |
+(defvar protobuf-font-lock-keywords protobuf-font-lock-keywords-3 |
+ "Default expressions to highlight in protobuf-mode.") |
+ |
+;; Our syntax table is auto-generated from the keyword classes we defined |
+;; previously with the `c-lang-const' macro. |
+(defvar protobuf-mode-syntax-table nil |
+ "Syntax table used in protobuf-mode buffers.") |
+(or protobuf-mode-syntax-table |
+ (setq protobuf-mode-syntax-table |
+ (funcall (c-lang-const c-make-mode-syntax-table protobuf)))) |
+ |
+(defvar protobuf-mode-abbrev-table nil |
+ "Abbreviation table used in protobuf-mode buffers.") |
+ |
+(defvar protobuf-mode-map nil |
+ "Keymap used in protobuf-mode buffers.") |
+(or protobuf-mode-map |
+ (setq protobuf-mode-map (c-make-inherited-keymap))) |
+ |
+(easy-menu-define protobuf-menu protobuf-mode-map |
+ "Protocol Buffers Mode Commands" |
+ (cons "Protocol Buffers" (c-lang-const c-mode-menu protobuf))) |
+ |
+;;;###autoload (add-to-list 'auto-mode-alist '("\\.proto\\'" . protobuf-mode)) |
+ |
+;;;###autoload |
+(defun protobuf-mode () |
+ "Major mode for editing Protocol Buffers description language. |
+ |
+The hook `c-mode-common-hook' is run with no argument at mode |
+initialization, then `protobuf-mode-hook'. |
+ |
+Key bindings: |
+\\{protobuf-mode-map}" |
+ (interactive) |
+ (kill-all-local-variables) |
+ (set-syntax-table protobuf-mode-syntax-table) |
+ (setq major-mode 'protobuf-mode |
+ mode-name "Protocol-Buffers" |
+ local-abbrev-table protobuf-mode-abbrev-table |
+ abbrev-mode t) |
+ (use-local-map protobuf-mode-map) |
+ (c-initialize-cc-mode t) |
+ (if (fboundp 'c-make-emacs-variables-local) |
+ (c-make-emacs-variables-local)) |
+ (c-init-language-vars protobuf-mode) |
+ (c-common-init 'protobuf-mode) |
+ (easy-menu-add protobuf-menu) |
+ (c-run-mode-hooks 'c-mode-common-hook 'protobuf-mode-hook) |
+ (c-update-modeline)) |
+ |
+(provide 'protobuf-mode) |
+ |
+;;; protobuf-mode.el ends here |