1;;; protobuf-mode.el --- major mode for editing protocol buffers. 2 3;; Author: Alexandre Vassalotti <alexandre@peadrop.com> 4;; Created: 23-Apr-2009 5;; Version: 0.3 6;; Keywords: google protobuf languages 7 8;; Redistribution and use in source and binary forms, with or without 9;; modification, are permitted provided that the following conditions are 10;; met: 11;; 12;; * Redistributions of source code must retain the above copyright 13;; notice, this list of conditions and the following disclaimer. 14;; * Redistributions in binary form must reproduce the above 15;; copyright notice, this list of conditions and the following disclaimer 16;; in the documentation and/or other materials provided with the 17;; distribution. 18;; * Neither the name of Google Inc. nor the names of its 19;; contributors may be used to endorse or promote products derived from 20;; this software without specific prior written permission. 21;; 22;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 26;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 28;; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 32;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 34;;; Commentary: 35 36;; Installation: 37;; - Put `protobuf-mode.el' in your Emacs load-path. 38;; - Add this line to your .emacs file: 39;; (require 'protobuf-mode) 40;; 41;; You can customize this mode just like any mode derived from CC Mode. If 42;; you want to add customizations specific to protobuf-mode, you can use the 43;; `protobuf-mode-hook'. For example, the following would make protocol-mode 44;; use 2-space indentation: 45;; 46;; (defconst my-protobuf-style 47;; '((c-basic-offset . 2) 48;; (indent-tabs-mode . nil))) 49;; 50;; (add-hook 'protobuf-mode-hook 51;; (lambda () (c-add-style "my-style" my-protobuf-style t))) 52;; 53;; Refer to the documentation of CC Mode for more information about 54;; customization details and how to use this mode. 55;; 56;; TODO: 57;; - Make highlighting for enum values work properly. 58;; - Fix the parser to recognize extensions as identifiers and not 59;; as casts. 60;; - Improve the parsing of option assignment lists. For example: 61;; optional int32 foo = 1 [(my_field_option) = 4.5]; 62;; - Add support for fully-qualified identifiers (e.g., with a leading "."). 63 64;;; Code: 65 66(require 'cc-mode) 67 68(eval-when-compile 69 (require 'cc-langs) 70 (require 'cc-fonts)) 71 72;; This mode does not inherit properties from other modes. So, we do not use 73;; the usual `c-add-language' function. 74(eval-and-compile 75 (put 'protobuf-mode 'c-mode-prefix "protobuf-")) 76 77;; The following code uses of the `c-lang-defconst' macro define syntactic 78;; features of protocol buffer language. Refer to the documentation in the 79;; cc-langs.el file for information about the meaning of the -kwds variables. 80 81(c-lang-defconst c-primitive-type-kwds 82 protobuf '("double" "float" "int32" "int64" "uint32" "uint64" "sint32" 83 "sint64" "fixed32" "fixed64" "sfixed32" "sfixed64" "bool" 84 "string" "bytes" "group")) 85 86(c-lang-defconst c-modifier-kwds 87 protobuf '("required" "optional" "repeated")) 88 89(c-lang-defconst c-class-decl-kwds 90 protobuf '("message" "enum" "service")) 91 92(c-lang-defconst c-constant-kwds 93 protobuf '("true" "false")) 94 95(c-lang-defconst c-other-decl-kwds 96 protobuf '("package" "import")) 97 98(c-lang-defconst c-other-kwds 99 protobuf '("default" "max")) 100 101(c-lang-defconst c-identifier-ops 102 ;; Handle extended identifiers like google.protobuf.MessageOptions 103 protobuf '((left-assoc "."))) 104 105;; The following keywords do not fit well in keyword classes defined by 106;; cc-mode. So, we approximate as best we can. 107 108(c-lang-defconst c-type-list-kwds 109 protobuf '("extensions" "to" "reserved")) 110 111(c-lang-defconst c-typeless-decl-kwds 112 protobuf '("extend" "rpc" "option" "returns")) 113 114 115;; Here we remove default syntax for loops, if-statements and other C 116;; syntactic features that are not supported by the protocol buffer language. 117 118(c-lang-defconst c-brace-list-decl-kwds 119 ;; Remove syntax for C-style enumerations. 120 protobuf nil) 121 122(c-lang-defconst c-block-stmt-1-kwds 123 ;; Remove syntax for "do" and "else" keywords. 124 protobuf nil) 125 126(c-lang-defconst c-block-stmt-2-kwds 127 ;; Remove syntax for "for", "if", "switch" and "while" keywords. 128 protobuf nil) 129 130(c-lang-defconst c-simple-stmt-kwds 131 ;; Remove syntax for "break", "continue", "goto" and "return" keywords. 132 protobuf nil) 133 134(c-lang-defconst c-paren-stmt-kwds 135 ;; Remove special case for the "(;;)" in for-loops. 136 protobuf nil) 137 138(c-lang-defconst c-label-kwds 139 ;; Remove case label syntax for the "case" and "default" keywords. 140 protobuf nil) 141 142(c-lang-defconst c-before-label-kwds 143 ;; Remove special case for the label in a goto statement. 144 protobuf nil) 145 146(c-lang-defconst c-cpp-matchers 147 ;; Disable all the C preprocessor syntax. 148 protobuf nil) 149 150(c-lang-defconst c-decl-prefix-re 151 ;; Same as for C, except it does not match "(". This is needed for disabling 152 ;; the syntax for casts. 153 protobuf "\\([\{\};,]+\\)") 154 155 156;; Add support for variable levels of syntax highlighting. 157 158(defconst protobuf-font-lock-keywords-1 (c-lang-const c-matchers-1 protobuf) 159 "Minimal highlighting for protobuf-mode.") 160 161(defconst protobuf-font-lock-keywords-2 (c-lang-const c-matchers-2 protobuf) 162 "Fast normal highlighting for protobuf-mode.") 163 164(defconst protobuf-font-lock-keywords-3 (c-lang-const c-matchers-3 protobuf) 165 "Accurate normal highlighting for protobuf-mode.") 166 167(defvar protobuf-font-lock-keywords protobuf-font-lock-keywords-3 168 "Default expressions to highlight in protobuf-mode.") 169 170;; Our syntax table is auto-generated from the keyword classes we defined 171;; previously with the `c-lang-const' macro. 172(defvar protobuf-mode-syntax-table nil 173 "Syntax table used in protobuf-mode buffers.") 174(or protobuf-mode-syntax-table 175 (setq protobuf-mode-syntax-table 176 (funcall (c-lang-const c-make-mode-syntax-table protobuf)))) 177 178(defvar protobuf-mode-abbrev-table nil 179 "Abbreviation table used in protobuf-mode buffers.") 180 181(defvar protobuf-mode-map nil 182 "Keymap used in protobuf-mode buffers.") 183(or protobuf-mode-map 184 (setq protobuf-mode-map (c-make-inherited-keymap))) 185 186(easy-menu-define protobuf-menu protobuf-mode-map 187 "Protocol Buffers Mode Commands" 188 (cons "Protocol Buffers" (c-lang-const c-mode-menu protobuf))) 189 190;;;###autoload (add-to-list 'auto-mode-alist '("\\.proto\\'" . protobuf-mode)) 191 192;;;###autoload 193(defun protobuf-mode () 194 "Major mode for editing Protocol Buffers description language. 195 196The hook `c-mode-common-hook' is run with no argument at mode 197initialization, then `protobuf-mode-hook'. 198 199Key bindings: 200\\{protobuf-mode-map}" 201 (interactive) 202 (kill-all-local-variables) 203 (set-syntax-table protobuf-mode-syntax-table) 204 (setq major-mode 'protobuf-mode 205 mode-name "Protocol-Buffers" 206 local-abbrev-table protobuf-mode-abbrev-table 207 abbrev-mode t) 208 (use-local-map protobuf-mode-map) 209 (c-initialize-cc-mode t) 210 (if (fboundp 'c-make-emacs-variables-local) 211 (c-make-emacs-variables-local)) 212 (c-init-language-vars protobuf-mode) 213 (c-common-init 'protobuf-mode) 214 (easy-menu-add protobuf-menu) 215 (c-run-mode-hooks 'c-mode-common-hook 'protobuf-mode-hook) 216 (c-update-modeline)) 217 218(provide 'protobuf-mode) 219 220;;; protobuf-mode.el ends here 221