From 4256bf4962faa614169fdd88a92e935cb4448d0f Mon Sep 17 00:00:00 2001
From: "Mark E. Shoulson" <mark@kli.org>
Date: Wed, 18 Dec 2019 07:58:42 -0500
Subject: Start playing with an xcompose-mode.el

---
 xcompose-mode.el | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 xcompose-mode.el

diff --git a/xcompose-mode.el b/xcompose-mode.el
new file mode 100644
index 0000000..769b68e
--- /dev/null
+++ b/xcompose-mode.el
@@ -0,0 +1,90 @@
+;; Blah blah add headers here.
+;; Playing with the notion of a major mode for .XCompose files.
+;; Maybe eventually smart enough to keep columns lined up.
+;; For now, settling for pretty colors.
+
+(defface xcompose-angle-face
+  '((t (:inherit font-lock-keyword-face)))
+  "Face for the <>s"
+  :group 'xcompose-mode)
+
+(defface xcompose-keys-face
+  '((t (:inherit font-lock-constant-face)))
+  "Face for the key names"
+  :group 'xcompose-mode)
+
+(defface xcompose-string-face
+  '((t (:inherit font-lock-string-face
+                 :height 1.2
+                 :box "black")))
+  "Face for the strings.  Not straight font-lock-string-face in case I want
+to make it big or something."
+  :group 'xcompose-mode)
+(defface xcompose-quotemark-face
+  '((t (:inherit font-lock-string-face
+                 :foreground "dark orchid")))
+  "Face for quotes around strings"
+  :group 'xcompose-mode)
+
+(defface xcompose-num-face
+  '((t (:inherit font-lock-preprocessor-face :weight bold)))
+  "Face for the hex numbers"
+  :group 'xcompose-mode)
+
+(defface xcompose-U-face
+  '((t (:inherit font-lock-preprocessor-face)))
+  "Face for the U before the hex numbers"
+  :group 'xcompose-mode)
+
+(defface xcompose-colon-face
+  '((t (:inherit bold)))
+  "Face for the \":\"."
+  :group 'xcompose-mode)
+
+
+(defvar xcompose-mode-syntax-table
+  (let ((st (make-syntax-table text-mode-syntax-table)))
+    (modify-syntax-entry ?< "(>  " st)
+    (modify-syntax-entry ?> ")<  " st)
+    (modify-syntax-entry ?# "<   " st)
+    (modify-syntax-entry ?_ "_   " st)
+    (modify-syntax-entry ?\n ">   " st)
+    st)
+  "Syntax table for xcompose-mode")
+
+(defvar xcompose-mode-map
+  (let ((map (make-sparse-keymap)))
+    ;; ADD BINDINGS
+    map)
+  "Keymap for xcompose-mode")
+
+(defvar xcompose-font-lock-keywords
+  '(
+    ("[<>]" . 'xcompose-angle-face)
+    ("<\\([a-zA-Z0-9_]*\\)>" . (1 'xcompose-keys-face))
+    ;; ("\"[^\"]*\"" . 'xcompose-string-face)
+    ("\"\\([^\"]*\\)\"" . (1 'xcompose-string-face))
+    ("\"" . 'xcompose-quotemark-face)
+    ("\\(U\\)\\([0-9A-Fa-f]*\\)" .
+     ((1 'xcompose-U-face) (2 'xcompose-num-face)))
+    (":" . 'xcompose-colon-face)
+    (" #.*" . 'glyphless-char)
+    ))
+
+(define-derived-mode xcompose-mode text-mode "XCompose"
+  "Major mode for .XCompose files"
+  (font-lock-add-keywords nil xcompose-font-lock-keywords)
+  (setq-local comment-start "#")
+  (setq-local comment-end "\n")
+  (setq-local comment-continue " *")
+  (setq-local comment-start-skip "/[*/]+[ \t]*")
+  (setq-local comment-end-skip "[ \t]*\\(?:\n\\|\\*+/\\)")
+  ;; Bizarrely enough, this actually works.
+  ;; But I think I might not want to use it.
+  ;; (setq-local font-lock-comment-face
+  ;;             '(:height 0.95 :inherit font-lock-comment-face))
+  ;; But lighten the color a little, since there's so much comment text...
+  (setq-local font-lock-comment-face
+              '(:inherit font-lock-comment-face :foreground "light coral"))
+  )
+
-- 
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