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John Doty 2012-03-22 07:16:09 -07:00
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;;; csharp-mode.el --- C# mode derived mode
;; Author: 2005 Dylan R. E. Moonfire
;; Maintainer: Dylan R. E. Moonfire <contact@mfgames.com>
;; Created: Feburary 2005
;; Modified: December 2005
;; Version: 0.5.0
;; Keywords: c# languages oop
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;
;; This is a separate mode to implement the C# constructs and
;; font-locking. It is based on the java-mode example from cc-mode.
;;
;; Note: The interface used in this file requires CC Mode 5.30 or
;; later.
;;; Bugs:
;;
;; Literal strings @"" do not fontify correctly.
;;
;; Method names are not fontified if you have an attribute before it.
;;
;; This code doesn't seem to work when you compile it, then
;; load/require in the emacs file. You will get an error (error
;; "`c-lang-defconst' must be used in a file") which happens because
;; cc-mode doesn't think it is in a buffer while loading directly
;; from the init. However, if you call it based on a file extension,
;; it works properly. Interestingly enough, this doesn't happen if
;; you don't byte-compile cc-mode.
;;; .emacs (don't put in (require 'csharp-mode))
;; (autoload 'csharp-mode "csharp-mode" "Major mode for editing C# code." t)
;; (setq auto-mode-alist
;; (append '(("\\.cs$" . csharp-mode)) auto-mode-alist))
;;; Versions:
;;
;; 0.1.0 - Initial release.
;; 0.2.0 - Fixed the identification on the "enum" keyword.
;; - Fixed the font-lock on the "base" keyword
;; 0.3.0 - Added a regex to fontify attributes. It isn't the
;; the best method, but it handles single-like attributes
;; well.
;; - Got "super" not to fontify as a keyword.
;; - Got extending classes and interfaces to fontify as something.
;; 0.4.0 - Removed the attribute matching because it broke more than
;; it fixed.
;; - Corrected a bug with namespace not being properly identified
;; and treating the class level as an inner object, which screwed
;; up formatting.
;; - Added "partial" to the keywords.
;; 0.5.0 - Found bugs with compiled cc-mode and loading from init files.
;; - Updated the eval-when-compile to code to let the mode be
;; compiled.
;;; Code:
(require 'cc-mode)
;; These are only required at compile time to get the sources for the
;; language constants. (The cc-fonts require and the font-lock
;; related constants could additionally be put inside an
;; (eval-after-load "font-lock" ...) but then some trickery is
;; necessary to get them compiled.)
(eval-when-compile
(let ((load-path
(if (and (boundp 'byte-compile-dest-file)
(stringp byte-compile-dest-file))
(cons (file-name-directory byte-compile-dest-file) load-path)
load-path)))
(load "cc-mode" nil t)
(load "cc-fonts" nil t)
(load "cc-langs" nil t)))
(eval-and-compile
;; Make our mode known to the language constant system. Use Java
;; mode as the fallback for the constants we don't change here.
;; This needs to be done also at compile time since the language
;; constants are evaluated then.
(c-add-language 'csharp-mode 'java-mode))
;; TODO
;; Defines our constant for finding attributes.
;;(defconst csharp-attribute-regex "\\[\\([XmlType]+\\)(")
;;(defconst csharp-attribute-regex "\\[\\(.\\)")
;; Java uses a series of regexes to change the font-lock for class
;; references. The problem comes in because Java uses Pascal (leading
;; space in names, SomeClass) for class and package names, but
;; Camel-casing (initial lowercase, upper case in words,
;; i.e. someVariable) for variables. The notation suggested by EMCA is
;; to use Pasacal notation for everything, except inner variables. So,
;; the regex and formatting actually produces very wrong results.
;;(error (byte-compile-dest-file))
;;(error (c-get-current-file))
(c-lang-defconst c-opt-after-id-concat-key
csharp (if (c-lang-const c-opt-identifier-concat-key)
(c-lang-const c-symbol-start)))
(c-lang-defconst c-basic-matchers-before
csharp `(
;; Font-lock the attributes by searching for the
;; appropriate regex and marking it as TODO.
;;,`(,(concat "\\(" csharp-attribute-regex "\\)")
;; 0 font-lock-function-name-face)
;; Put a warning face on the opener of unclosed strings that
;; can't span lines. Later font
;; lock packages have a `font-lock-syntactic-face-function' for
;; this, but it doesn't give the control we want since any
;; fontification done inside the function will be
;; unconditionally overridden.
,(c-make-font-lock-search-function
;; Match a char before the string starter to make
;; `c-skip-comments-and-strings' work correctly.
(concat ".\\(" c-string-limit-regexp "\\)")
'((c-font-lock-invalid-string)))
;; Fontify keyword constants.
,@(when (c-lang-const c-constant-kwds)
(let ((re (c-make-keywords-re nil
(c-lang-const c-constant-kwds))))
`((eval . (list ,(concat "\\<\\(" re "\\)\\>")
1 c-constant-face-name)))))
;; Fontify all keywords except the primitive types.
,`(,(concat "\\<" (c-lang-const c-regular-keywords-regexp))
1 font-lock-keyword-face)
;; Fontify leading identifiers in fully qualified names like
;; "Foo.Bar".
,@(when (c-lang-const c-opt-identifier-concat-key)
`((,(byte-compile
`(lambda (limit)
(while (re-search-forward
,(concat "\\(\\<" ; 1
"\\(" (c-lang-const c-symbol-key)
"\\)" ; 2
"[ \t\n\r\f\v]*"
(c-lang-const
c-opt-identifier-concat-key)
"[ \t\n\r\f\v]*"
"\\)"
"\\("
(c-lang-const
c-opt-after-id-concat-key)
"\\)")
limit t)
(unless (progn
(goto-char (match-beginning 0))
(c-skip-comments-and-strings limit))
(or (get-text-property (match-beginning 2) 'face)
(c-put-font-lock-face (match-beginning 2)
(match-end 2)
c-reference-face-name))
(goto-char (match-end 1)))))))))
))
;; C# does not allow a leading qualifier operator. It also doesn't
;; allow the ".*" construct of Java. So, we redo this regex without
;; the "\\|\\*" regex.
(c-lang-defconst c-identifier-key
csharp (concat "\\(" (c-lang-const c-symbol-key) "\\)" ; 1
(concat "\\("
"[ \t\n\r\f\v]*"
(c-lang-const c-opt-identifier-concat-key)
"[ \t\n\r\f\v]*"
(concat "\\("
"\\(" (c-lang-const c-symbol-key) "\\)"
"\\)")
"\\)*")))
;; C# has a few rules that are slightly different than Java for
;; operators. This also removed the Java's "super" and replaces it
;; with the C#'s "base".
(c-lang-defconst c-operators
csharp `((prefix "base")))
;; C#, unlike Java, does use CPP prefixes for the regions and other directives.
(c-lang-defconst c-opt-cpp-prefix
csharp "\\s *#\\s *")
;; C# uses the following assignment operators
(c-lang-defconst c-assignment-operators
csharp '("=" "*=" "/=" "%=" "+=" "-=" ">>=" "<<=" "&=" "^=" "|="))
;; This defines the primative types for C#
(c-lang-defconst c-primitive-type-kwds
;; ECMA-344, S8
csharp '("object" "string" "sbyte" "short" "int" "long" "byte"
"ushort" "uint" "ulong" "float" "double" "bool" "char"
"decimal" "void"))
;; The keywords that define that the following is a type, such as a
;; class definition.
(c-lang-defconst c-type-prefix-kwds
;; ECMA-344, S?
csharp '("class" "interface" "enum" "struct"))
;; Type modifier keywords. They appear anywhere in types, but modifiy
;; instead create one.
(c-lang-defconst c-type-modifier-kwds
;; EMCA-344, S?
csharp '("readonly" "const"))
;; Structures that are similiar to classes.
(c-lang-defconst c-class-decl-kwds
;; EMCA-344, S?
csharp '("class" "interface"))
;; The various modifiers used for class and method descriptions.
(c-lang-defconst c-modifier-kwds
csharp '("public" "partial" "private" "const" "abstract"
"protected" "ref" "out" "static" "virtual"
"override" "params" "internal"))
;; We don't use the protection level stuff because it breaks the
;; method indenting. Not sure why, though.
(c-lang-defconst c-protection-kwds
csharp nil)
;; Define the keywords that can have something following after them.
(c-lang-defconst c-type-list-kwds
csharp '("struct" "class" "interface" "is" "as"
"delegate" "event"))
;; This allows the classes after the : in the class declartion to be
;; fontified.
(c-lang-defconst c-typeless-decl-kwds
csharp '(":"))
;; Sets up the enum to handle the list properly
(c-lang-defconst c-brace-list-decl-kwds
csharp '("enum"))
;; We need to remove Java's package keyword
(c-lang-defconst c-ref-list-kwds
csharp '("using" "namespace"))
;; Follow-on blocks that don't require a brace
(c-lang-defconst c-block-stmt-2-kwds
csharp '("for" "if" "switch" "while" "catch" "foreach"
"checked" "unchecked" "lock"))
;; Statements that break out of braces
(c-lang-defconst c-simple-stmt-kwds
csharp '("return" "continue" "break" "throw" "goto"))
;; Statements that allow a label
;; TODO?
(c-lang-defconst c-before-label-kwds
csharp nil)
;; Constant keywords
(c-lang-defconst c-constant-kwds
csharp '("true" "false" "null"))
;; Keywords that start "primary expressions."
(c-lang-defconst c-primary-expr-kwds
csharp '("this" "base"))
;; We need to treat namespace as an outer block to class indenting
;; works properly.
(c-lang-defconst c-other-block-decl-kwds
csharp '("namespace"))
;; We need to include the "as" for the foreach
(c-lang-defconst c-other-kwds
csharp '("in" "sizeof" "typeof"))
(c-lang-defconst c-overloadable-operators
;; EMCA-344, S14.2.1
csharp '("+" "-" "*" "/" "%" "&" "|" "^"
"<<" ">>" "==" "!=" ">" "<" ">=" "<="))
;; No cpp in this language, but there's still a "sharppragma" directive to
;; fontify. (The definitions for the extra keywords above are enough
;; to incorporate them into the fontification regexps for types and
;; keywords, so no additional font-lock patterns are required.)
(c-lang-defconst c-cpp-matchers
csharp (cons
;; Use the eval form for `font-lock-keywords' to be able to use
;; the `c-preprocessor-face-name' variable that maps to a
;; suitable face depending on the (X)Emacs version.
'(eval . (list "^\\s *\\(sharppragma\\)\\>\\(.*\\)"
(list 1 c-preprocessor-face-name)
'(2 font-lock-string-face)))
;; There are some other things in `c-cpp-matchers' besides the
;; preprocessor support, so include it.
(c-lang-const c-cpp-matchers)))
(defcustom csharp-font-lock-extra-types nil
"*List of extra types (aside from the type keywords) to recognize in C# mode.
Each list item should be a regexp matching a single identifier.")
(defconst csharp-font-lock-keywords-1 (c-lang-const c-matchers-1 csharp)
"Minimal highlighting for C# mode.")
(defconst csharp-font-lock-keywords-2 (c-lang-const c-matchers-2 csharp)
"Fast normal highlighting for C# mode.")
(defconst csharp-font-lock-keywords-3 (c-lang-const c-matchers-3 csharp)
"Accurate normal highlighting for C# mode.")
(defvar csharp-font-lock-keywords csharp-font-lock-keywords-3
"Default expressions to highlight in C# mode.")
(defvar csharp-mode-syntax-table nil
"Syntax table used in csharp-mode buffers.")
(or csharp-mode-syntax-table
(setq csharp-mode-syntax-table
(funcall (c-lang-const c-make-mode-syntax-table csharp))))
(defvar csharp-mode-abbrev-table nil
"Abbreviation table used in csharp-mode buffers.")
(c-define-abbrev-table 'csharp-mode-abbrev-table
;; Keywords that if they occur first on a line might alter the
;; syntactic context, and which therefore should trig reindentation
;; when they are completed.
'(("else" "else" c-electric-continued-statement 0)
("while" "while" c-electric-continued-statement 0)
("catch" "catch" c-electric-continued-statement 0)
("finally" "finally" c-electric-continued-statement 0)))
(defvar csharp-mode-map (let ((map (c-make-inherited-keymap)))
;; Add bindings which are only useful for C#
map)
"Keymap used in csharp-mode buffers.")
;;(easy-menu-define csharp-menu csharp-mode-map "C# Mode Commands"
;; ;; Can use `csharp' as the language for `c-mode-menu'
;; ;; since its definition covers any language. In
;; ;; this case the language is used to adapt to the
;; ;; nonexistence of a cpp pass and thus removing some
;; ;; irrelevant menu alternatives.
;; (cons "C#" (c-lang-const c-mode-menu csharp)))
;;; Autoload mode trigger
(add-to-list 'auto-mode-alist '("\\.cs" . csharp-mode))
;; Custom variables
(defcustom csharp-mode-hook nil
"*Hook called by `csharp-mode'."
:type 'hook
:group 'c)
;;; The entry point into the mode
(defun csharp-mode ()
"Major mode for editing C# (pronounced \"see sharp\") code.
This is a simple example of a separate mode derived from CC Mode to
support a language with syntax similar to C/C++/ObjC/Java/IDL/Pike.
The hook `c-mode-common-hook' is run with no args at mode
initialization, then `csharp-mode-hook'.
Key bindings:
\\{csharp-mode-map}"
(interactive)
(kill-all-local-variables)
(c-initialize-cc-mode t)
(set-syntax-table csharp-mode-syntax-table)
(setq major-mode 'csharp-mode
mode-name "C#"
local-abbrev-table csharp-mode-abbrev-table
abbrev-mode t)
(use-local-map c-mode-map)
;; `c-init-language-vars' is a macro that is expanded at compile
;; time to a large `setq' with all the language variables and their
;; customized values for our language.
(c-init-language-vars csharp-mode)
;; `c-common-init' initializes most of the components of a CC Mode
;; buffer, including setup of the mode menu, font-lock, etc.
;; There's also a lower level routine `c-basic-common-init' that
;; only makes the necessary initialization to get the syntactic
;; analysis and similar things working.
(c-common-init 'csharp-mode)
;;(easy-menu-add csharp-menu)
(run-hooks 'c-mode-common-hook)
(run-hooks 'csharp-mode-hook)
(c-update-modeline))
(provide 'csharp-mode)
;;; csharp-mode.el ends here