[elpa] master daab780 20/21: Add 'packages/dts-mode/' from commit '6ec1443ead16105234765f9b48df9b4aca562e61'

[Stefan Monnier]

branch: master
commit daab7802cdb5efacc482dddc5714c853b49bfac6
Merge: 8acc296 6ec1443
Author: Stefan Monnier <address@hidden>
Commit: Stefan Monnier <address@hidden>

    Add 'packages/dts-mode/' from commit 
'6ec1443ead16105234765f9b48df9b4aca562e61'
    
    git-subtree-dir: packages/dts-mode
    git-subtree-mainline: 8acc296b693c71bcde29cdd0d3b21f2540b08043
    git-subtree-split: 6ec1443ead16105234765f9b48df9b4aca562e61
---
 packages/dts-mode/README.mkd  |   12 ++++
 packages/dts-mode/dts-mode.el |  117 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 129 insertions(+), 0 deletions(-)

diff --git a/packages/dts-mode/README.mkd b/packages/dts-mode/README.mkd
new file mode 100644
index 0000000..8de2d90
--- /dev/null
+++ b/packages/dts-mode/README.mkd
@@ -0,0 +1,12 @@
+# dts-mode — A Device Tree major mode for emacs
+
+This is a quick attempt at getting basic highlighting for [Device
+Tree][devicetree] syntax in emacs. While it's fairly functional, it's not
+pretty; pull requests welcome.
+
+[devicetree]: http://www.devicetree.org/
+
+## Installation
+
+Available through [MELPA](http://melpa.milkbox.net/#/). Alternatively ensure
+`dts-mode.el` is available in `load-path` and `(require 'dts-mode)`.
diff --git a/packages/dts-mode/dts-mode.el b/packages/dts-mode/dts-mode.el
new file mode 100644
index 0000000..2ee2f44
--- /dev/null
+++ b/packages/dts-mode/dts-mode.el
@@ -0,0 +1,117 @@
+;;; dts-mode.el --- Major mode for Devicetree source code
+
+;; Copyright (C) 2014  Ben Gamari
+
+;; Version: 0.1.0
+;; Author: Ben Gamari <address@hidden>
+;; Keywords: languages
+
+;; 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 3 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.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(defconst dts-re-ident "\\([[:word:]_][[:word:][:multibyte:]_,[:digit:]-]*\\)")
+
+(defvar dts-mode-font-lock-keywords
+  `(
+    ;; names like `name: hi {`
+    (,(concat dts-re-ident ":") 1 font-lock-variable-name-face)
+    ;; nodes
+    (,(concat dts-re-ident "\\(@[[:xdigit:]]+\\)?[[:space:]]*{") 1 
font-lock-type-face)
+    ;; assignments
+    (,(concat dts-re-ident "[[:space:]]*=") 1 font-lock-variable-name-face)
+    (,(concat dts-re-ident "[[:space:]]*;") 1 font-lock-variable-name-face)
+    ;; references
+    (,(concat "\\&" dts-re-ident) 1 font-lock-variable-name-face)
+    )
+  )
+
+(defvar dts-mode-syntax-table
+  (let ((table (make-syntax-table)))
+    (modify-syntax-entry ?<  "(" table)
+    (modify-syntax-entry ?>  ")" table)
+
+    (modify-syntax-entry ?&  "." table)
+    (modify-syntax-entry ?|  "." table)
+    (modify-syntax-entry ?&  "." table)
+    (modify-syntax-entry ?~  "." table)
+
+    ;; _ and , are both word characters
+    (modify-syntax-entry ?,  "_" table)
+    (modify-syntax-entry ?_  "w" table)
+
+    ;; Strings
+    (modify-syntax-entry ?\" "\"" table)
+    (modify-syntax-entry ?\\ "\\" table)
+
+    ;; Comments
+    (modify-syntax-entry ?/  ". 124b" table)
+    (modify-syntax-entry ?*  ". 23"   table)
+    (modify-syntax-entry ?\n "> b"    table)
+    (modify-syntax-entry ?\^m "> b"   table)
+
+    table))
+
+(defun dts--calculate-indentation ()
+  (interactive)
+  (save-excursion
+    (let ((end (point-at-eol))
+          (cnt 0)
+          (initial-point (point)))
+      (goto-char 0)
+      (while (re-search-forward "\\([{}]\\)" end t)
+        (if (string= (match-string-no-properties 0) "{")
+            (setq cnt (1+ cnt))
+          (setq cnt (1- cnt))))
+      ;; subtract one if the current line has an opening brace since we
+      ;; shouldn't add the indentation level until the following line
+      (goto-char initial-point)
+      (beginning-of-line)
+      (when (re-search-forward "{" (point-at-eol) t)
+        (setq cnt (1- cnt)))
+      cnt)))
+
+(defun dts-indent-line ()
+  (interactive)
+  (let ((indent (dts--calculate-indentation)))
+    (indent-line-to (* indent tab-width))))
+
+(defalias 'dts-parent-mode
+  (if (fboundp 'prog-mode) 'prog-mode 'fundamental-mode))
+
+;;;###autoload
+(define-derived-mode dts-mode dts-parent-mode "Devicetree"
+  "Major mode for editing Devicetrees"
+  :group 'dts-mode
+  :syntax-table dts-mode-syntax-table
+
+  ;; Fonts
+  (set (make-local-variable 'font-lock-defaults) '(dts-mode-font-lock-keywords 
nil nil nil nil))
+
+  (set (make-local-variable 'comment-start) "/* ")
+  (set (make-local-variable 'comment-end)   " */")
+  (set (make-local-variable 'comment-multi-line) t)
+  (set (make-local-variable 'indent-line-function) 'dts-indent-line))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.dts\\'" . dts-mode))
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.dtsi\\'" . dts-mode))
+
+(provide 'dts-mode)
+;;; dts-mode.el ends here