;;; context-coloring.el --- Highlight by scope -*- lexical-binding: t; -*-
-;; Copyright (C) 2014-2015 Free Software Foundation, Inc.
+;; Copyright (C) 2014-2016 Free Software Foundation, Inc.
;; Author: Jackson Ray Hamilton <jackson@jacksonrayhamilton.com>
-;; Version: 6.3.0
+;; Version: 8.0.1
;; Keywords: convenience faces tools
-;; Package-Requires: ((emacs "24") (js2-mode "20150126"))
+;; Package-Requires: ((emacs "24.3"))
;; URL: https://github.com/jacksonrayhamilton/context-coloring
;; This file is part of GNU Emacs.
;;; Code:
-(require 'js2-mode)
-
;;; Utilities
(defun context-coloring-join (strings delimiter)
"Join a list of STRINGS with the string DELIMITER."
- (mapconcat 'identity strings delimiter))
-
-(defsubst context-coloring-trim-right (string)
- "Remove leading whitespace from STRING."
- (if (string-match "[ \t\n\r]+\\'" string)
- (replace-match "" t t string)
- string))
-
-(defsubst context-coloring-trim-left (string)
- "Remove trailing whitespace from STRING."
- (if (string-match "\\`[ \t\n\r]+" string)
- (replace-match "" t t string)
- string))
-
-(defsubst context-coloring-trim (string)
- "Remove leading and trailing whitespace from STRING."
- (context-coloring-trim-left (context-coloring-trim-right string)))
+ (mapconcat #'identity strings delimiter))
;;; Faces
-(defun context-coloring-defface (level tty light dark)
- "Define a face for LEVEL with colors for TTY, LIGHT and DARK
-backgrounds."
+(defun context-coloring-defface (level light dark tty)
+ "Define a face for LEVEL with LIGHT, DARK and TTY colors."
(let ((face (intern (format "context-coloring-level-%s-face" level)))
(doc (format "Context coloring face, level %s." level)))
(custom-declare-face
doc
:group 'context-coloring)))
-(defun context-coloring-defface-neutral (level)
- "Define a face for LEVEL with the default neutral colors."
- (context-coloring-defface level nil "#3f3f3f" "#cdcdcd"))
+;; Provide some default colors based off Emacs's defaults.
+(context-coloring-defface 0 "#000000" "#ffffff" nil)
+(context-coloring-defface 1 "#008b8b" "#00ffff" "yellow")
+(context-coloring-defface 2 "#0000ff" "#87cefa" "green")
+(context-coloring-defface 3 "#483d8b" "#b0c4de" "cyan")
+(context-coloring-defface 4 "#a020f0" "#eedd82" "blue")
+(context-coloring-defface 5 "#a0522d" "#98fb98" "magenta")
+(context-coloring-defface 6 "#228b22" "#7fffd4" "red")
+(context-coloring-defface 7 "#3f3f3f" "#cdcdcd" nil)
+
+(defconst context-coloring-default-maximum-face 7
+ "Maximum face when there are no custom faces.")
+
+;; Create placeholder faces for users and theme authors.
+(dotimes (level 18)
+ (let* ((level (+ level 8))
+ (face (intern (format "context-coloring-level-%s-face" level)))
+ (doc (format "Context coloring face, level %s." level)))
+ (custom-declare-face face nil doc :group 'context-coloring)))
+
+(defvar-local context-coloring-maximum-face nil
+ "Dynamic index of the highest face available for coloring.")
-(context-coloring-defface 0 nil "#000000" "#ffffff")
-(context-coloring-defface 1 "yellow" "#008b8b" "#00ffff")
-(context-coloring-defface 2 "green" "#0000ff" "#87cefa")
-(context-coloring-defface 3 "cyan" "#483d8b" "#b0c4de")
-(context-coloring-defface 4 "blue" "#a020f0" "#eedd82")
-(context-coloring-defface 5 "magenta" "#a0522d" "#98fb98")
-(context-coloring-defface 6 "red" "#228b22" "#7fffd4")
-(context-coloring-defface-neutral 7)
+(defsubst context-coloring-level-face (level)
+ "Return symbol for face with LEVEL."
+ ;; `concat' is faster than `format' here.
+ (intern-soft
+ (concat "context-coloring-level-" (number-to-string level) "-face")))
-(defvar context-coloring-maximum-face nil
- "Index of the highest face available for coloring.")
+(defsubst context-coloring-bounded-level-face (level)
+ "Return symbol for face with LEVEL, bounded by the maximum."
+ (context-coloring-level-face (min level context-coloring-maximum-face)))
-(defvar context-coloring-original-maximum-face nil
- "Fallback value for `context-coloring-maximum-face' when all
- themes have been disabled.")
+(defconst context-coloring-level-face-regexp
+ "context-coloring-level-\\([[:digit:]]+\\)-face"
+ "Extract a level from a face.")
-(setq context-coloring-maximum-face 7)
+(defun context-coloring-theme-highest-level (theme)
+ "Return the highest coloring level for THEME, or -1."
+ (let* ((settings (get theme 'theme-settings))
+ (tail settings)
+ face-string
+ number
+ (found -1))
+ (while tail
+ (and (eq (nth 0 (car tail)) 'theme-face)
+ (setq face-string (symbol-name (nth 1 (car tail))))
+ (string-match
+ context-coloring-level-face-regexp
+ face-string)
+ (setq number (string-to-number
+ (substring face-string
+ (match-beginning 1)
+ (match-end 1))))
+ (> number found)
+ (setq found number))
+ (setq tail (cdr tail)))
+ found))
-(setq context-coloring-original-maximum-face
- context-coloring-maximum-face)
+(defun context-coloring-update-maximum-face ()
+ "Save the highest possible face for the current theme."
+ (let ((themes (append custom-enabled-themes '(user)))
+ (continue t)
+ theme
+ highest-level)
+ (while continue
+ (setq theme (car themes))
+ (setq themes (cdr themes))
+ (setq highest-level (context-coloring-theme-highest-level theme))
+ (setq continue (and themes (= highest-level -1))))
+ (setq context-coloring-maximum-face
+ (cond
+ ((= highest-level -1)
+ context-coloring-default-maximum-face)
+ (t
+ highest-level)))))
-;; Theme authors can have up to 26 levels: 1 (0th) for globals, 24 (1st-24th)
-;; for nested levels, and 1 (25th) for infinity.
-(dotimes (number 18)
- (context-coloring-defface-neutral (+ number context-coloring-maximum-face 1)))
+;;; Change detection
-;;; Face functions
+(defvar-local context-coloring-changed-p nil
+ "Indication that the buffer has changed recently, which implies
+that it should be colored again by
+`context-coloring-maybe-colorize-idle-timer' if that timer is
+being used.")
-(defsubst context-coloring-level-face (level)
- "Return the symbol for a face with LEVEL."
- ;; `concat' is faster than `format' here.
- (intern-soft
- (concat "context-coloring-level-" (number-to-string level) "-face")))
+(defvar-local context-coloring-changed-start nil
+ "Beginning of last text that changed.")
-(defsubst context-coloring-bounded-level-face (level)
- "Return the symbol for a face with LEVEL, bounded by
-`context-coloring-maximum-face'."
- (context-coloring-level-face (min level context-coloring-maximum-face)))
+(defvar-local context-coloring-changed-end nil
+ "End of last text that changed.")
+
+(defvar-local context-coloring-changed-length nil
+ "Length of last text that changed.")
+
+(defun context-coloring-change-function (start end length)
+ "Register a change so that a buffer can be colorized soon.
+
+START, END and LENGTH are recorded for later use."
+ ;; Tokenization is obsolete if there was a change.
+ (setq context-coloring-changed-start start)
+ (setq context-coloring-changed-end end)
+ (setq context-coloring-changed-length length)
+ (setq context-coloring-changed-p t))
+
+(defun context-coloring-maybe-colorize-with-buffer (buffer)
+ "Color BUFFER and if it has changed."
+ (when (and (eq buffer (current-buffer))
+ context-coloring-changed-p)
+ (context-coloring-colorize-with-buffer buffer)
+ (setq context-coloring-changed-p nil)
+ (setq context-coloring-changed-start nil)
+ (setq context-coloring-changed-end nil)
+ (setq context-coloring-changed-length nil)))
+
+(defvar-local context-coloring-maybe-colorize-idle-timer nil
+ "The currently-running idle timer for conditional coloring.")
+
+(defvar-local context-coloring-colorize-idle-timer nil
+ "The currently-running idle timer for unconditional coloring.")
+
+(defcustom context-coloring-default-delay 0.25
+ "Default delay between a buffer update and colorization.
+
+Increase this if your machine is high-performing. Decrease it if
+it ain't."
+ :type 'float
+ :group 'context-coloring)
+
+(defun context-coloring-cancel-timer (timer)
+ "Cancel TIMER."
+ (when timer
+ (cancel-timer timer)))
+
+(defun context-coloring-schedule-coloring (time)
+ "Schedule coloring to occur once after Emacs is idle for TIME."
+ (context-coloring-cancel-timer context-coloring-colorize-idle-timer)
+ (setq context-coloring-colorize-idle-timer
+ (run-with-idle-timer
+ time
+ nil
+ #'context-coloring-colorize-with-buffer
+ (current-buffer))))
+
+(defun context-coloring-setup-idle-change-detection ()
+ "Setup idle change detection."
+ (let ((dispatch (context-coloring-get-current-dispatch)))
+ (add-hook
+ 'after-change-functions #'context-coloring-change-function nil t)
+ (add-hook
+ 'kill-buffer-hook #'context-coloring-teardown-idle-change-detection nil t)
+ (setq context-coloring-maybe-colorize-idle-timer
+ (run-with-idle-timer
+ (or (plist-get dispatch :delay) context-coloring-default-delay)
+ t
+ #'context-coloring-maybe-colorize-with-buffer
+ (current-buffer)))))
+
+(defun context-coloring-teardown-idle-change-detection ()
+ "Teardown idle change detection."
+ (dolist (timer (list context-coloring-colorize-idle-timer
+ context-coloring-maybe-colorize-idle-timer))
+ (context-coloring-cancel-timer timer))
+ (remove-hook
+ 'kill-buffer-hook #'context-coloring-teardown-idle-change-detection t)
+ (remove-hook
+ 'after-change-functions #'context-coloring-change-function t))
;;; Colorization utilities
(defsubst context-coloring-colorize-region (start end level)
- "Color characters from the 1-indexed START point (inclusive) to
-the END point (exclusive) with the face corresponding to LEVEL."
+ "Color from START (inclusive) to END (exclusive) with LEVEL."
(add-text-properties
start
end
`(face ,(context-coloring-bounded-level-face level))))
-(make-obsolete-variable
- 'context-coloring-comments-and-strings
- "use `context-coloring-syntactic-comments' and
- `context-coloring-syntactic-strings' instead."
- "6.1.0")
-
(defcustom context-coloring-syntactic-comments t
"If non-nil, also color comments using `font-lock'."
+ :type 'boolean
:group 'context-coloring)
(defcustom context-coloring-syntactic-strings t
"If non-nil, also color strings using `font-lock'."
+ :type 'boolean
:group 'context-coloring)
(defun context-coloring-font-lock-syntactic-comment-function (state)
- "Tell `font-lock' to color a comment but not a string."
+ "Color a comment according to STATE."
(if (nth 3 state) nil font-lock-comment-face))
(defun context-coloring-font-lock-syntactic-string-function (state)
- "Tell `font-lock' to color a string but not a comment."
+ "Color a string according to STATE."
(if (nth 3 state) font-lock-string-face nil))
-(defsubst context-coloring-maybe-colorize-comments-and-strings (&optional min max)
- "Color the current buffer's comments or strings if
-`context-coloring-syntactic-comments' or
-`context-coloring-syntactic-strings' are non-nil."
+(defsubst context-coloring-colorize-comments-and-strings (&optional min max keywords-p)
+ "Maybe color comments and strings in buffer from MIN to MAX.
+MIN defaults to beginning of buffer. MAX defaults to end. If
+KEYWORDS-P is non-nil, also color keywords from MIN to MAX."
(when (or context-coloring-syntactic-comments
context-coloring-syntactic-strings)
(let ((min (or min (point-min)))
(cond
((and context-coloring-syntactic-comments
(not context-coloring-syntactic-strings))
- 'context-coloring-font-lock-syntactic-comment-function)
+ #'context-coloring-font-lock-syntactic-comment-function)
((and context-coloring-syntactic-strings
(not context-coloring-syntactic-comments))
- 'context-coloring-font-lock-syntactic-string-function)
+ #'context-coloring-font-lock-syntactic-string-function)
(t
font-lock-syntactic-face-function))))
(save-excursion
(font-lock-fontify-syntactically-region min max)
- ;; TODO: Make configurable at the dispatch level.
- (when (eq major-mode 'emacs-lisp-mode)
+ (when keywords-p
(font-lock-fontify-keywords-region min max))))))
+(defcustom context-coloring-initial-level 0
+ "Scope level at which to start coloring.
-;;; js2-mode colorization
-
-(defvar-local context-coloring-js2-scope-level-hash-table nil
- "Associate `js2-scope' structures and with their scope
- levels.")
-
-(defcustom context-coloring-js-block-scopes nil
- "If non-nil, also color block scopes in the scope hierarchy in JavaScript.
-
-The block-scoped `let' and `const' are introduced in ES6. Enable
-this for ES6 code; disable it elsewhere.
-
-Supported modes: `js2-mode'"
+If top-level variables and functions do not become global, but
+are scoped to a file (as in Node.js), set this to `1'."
+ :type 'integer
+ :safe #'integerp
:group 'context-coloring)
-(defsubst context-coloring-js2-scope-level (scope)
- "Return the level of SCOPE."
- (cond ((gethash scope context-coloring-js2-scope-level-hash-table))
- (t
- (let ((level 0)
- (current-scope scope)
- enclosing-scope)
- (while (and current-scope
- (js2-node-parent current-scope)
- (setq enclosing-scope
- (js2-node-get-enclosing-scope current-scope)))
- (when (or context-coloring-js-block-scopes
- (let ((type (js2-scope-type current-scope)))
- (or (= type js2-SCRIPT)
- (= type js2-FUNCTION)
- (= type js2-CATCH))))
- (setq level (+ level 1)))
- (setq current-scope enclosing-scope))
- (puthash scope level context-coloring-js2-scope-level-hash-table)))))
-
-(defsubst context-coloring-js2-local-name-node-p (node)
- "Determine if NODE is a `js2-name-node' representing a local
-variable."
- (and (js2-name-node-p node)
- (let ((parent (js2-node-parent node)))
- (not (or (and (js2-object-prop-node-p parent)
- (eq node (js2-object-prop-node-left parent)))
- (and (js2-prop-get-node-p parent)
- ;; For nested property lookup, the node on the left is a
- ;; `js2-prop-get-node', so this always works.
- (eq node (js2-prop-get-node-right parent))))))))
-
-(defvar-local context-coloring-point-max nil
- "Cached value of `point-max'.")
-
-(defsubst context-coloring-js2-colorize-node (node level)
- "Color NODE with the color for LEVEL."
- (let ((start (js2-node-abs-pos node)))
- (context-coloring-colorize-region
- start
- (min
- ;; End
- (+ start (js2-node-len node))
- ;; Somes nodes (like the ast when there is an unterminated multiline
- ;; comment) will stretch to the value of `point-max'.
- context-coloring-point-max)
- level)))
-
-(defun context-coloring-js2-colorize ()
- "Color the current buffer using the abstract syntax tree
-generated by `js2-mode'."
- ;; Reset the hash table; the old one could be obsolete.
- (setq context-coloring-js2-scope-level-hash-table (make-hash-table :test 'eq))
- (setq context-coloring-point-max (point-max))
- (with-silent-modifications
- (js2-visit-ast
- js2-mode-ast
- (lambda (node end-p)
- (when (null end-p)
- (cond
- ((js2-scope-p node)
- (context-coloring-js2-colorize-node
- node
- (context-coloring-js2-scope-level node)))
- ((context-coloring-js2-local-name-node-p node)
- (let* ((enclosing-scope (js2-node-get-enclosing-scope node))
- (defining-scope (js2-get-defining-scope
- enclosing-scope
- (js2-name-node-name node))))
- ;; The tree seems to be walked lexically, so an entire scope will
- ;; be colored, including its name nodes, before they are reached.
- ;; Coloring the nodes defined in that scope would be redundant, so
- ;; don't do it.
- (when (not (eq defining-scope enclosing-scope))
- (context-coloring-js2-colorize-node
- node
- (context-coloring-js2-scope-level defining-scope))))))
- ;; The `t' indicates to search children.
- t)))
- (context-coloring-maybe-colorize-comments-and-strings)))
-
-
-;;; Emacs Lisp colorization
-
-(defsubst context-coloring-forward-sws ()
- "Move forward through whitespace and comments."
- (while (forward-comment 1)))
-
-(defsubst context-coloring-forward-sexp-position ()
- "Like vanilla `forward-sexp', but just return the position."
- (scan-sexps (point) 1))
-
-(defsubst context-coloring-elisp-identifier-syntax-p (syntax-code)
- (or (= 2 syntax-code)
- (= 3 syntax-code)))
-
-(defsubst context-coloring-open-parenthesis-p (syntax-code)
- (= 4 syntax-code))
-
-(defsubst context-coloring-close-parenthesis-p (syntax-code)
- (= 5 syntax-code))
-
-(defsubst context-coloring-expression-prefix-p (syntax-code)
- (= 6 syntax-code))
-
-(defsubst context-coloring-at-open-parenthesis-p ()
- (= 4 (logand #xFFFF (car (syntax-after (point))))))
-
-(defsubst context-coloring-ppss-depth (ppss)
- ;; Same as (nth 0 ppss).
- (car ppss))
-
-(defsubst context-coloring-at-stack-depth-p (stack depth)
- (= (plist-get (car stack) :depth) depth))
-
-(defsubst context-coloring-exact-regexp (word)
- "Create a regexp that matches exactly WORD."
- (concat "\\`" (regexp-quote word) "\\'"))
-
-(defsubst context-coloring-exact-or-regexp (words)
- "Create a regexp that matches any exact word in WORDS."
- (context-coloring-join
- (mapcar 'context-coloring-exact-regexp words) "\\|"))
-
-(defconst context-coloring-elisp-defun-regexp
- (context-coloring-exact-or-regexp
- '("defun" "defun*" "defsubst" "defmacro"
- "cl-defun" "cl-defsubst" "cl-defmacro")))
-
-(defconst context-coloring-elisp-lambda-regexp
- (context-coloring-exact-regexp "lambda"))
-
-(defconst context-coloring-elisp-let-regexp
- (context-coloring-exact-regexp "let"))
-
-(defconst context-coloring-elisp-let*-regexp
- (context-coloring-exact-regexp "let*"))
-
-(defconst context-coloring-elisp-arglist-arg-regexp
- "\\`[^&:]")
-
-(defconst context-coloring-ignored-word-regexp
- (context-coloring-join (list "\\`[-+]?[0-9]"
- "\\`[&:].+"
- (context-coloring-exact-or-regexp
- '("t" "nil" "." "?")))
- "\\|"))
-
-(defconst context-coloring-WORD-CODE 2)
-(defconst context-coloring-SYMBOL-CODE 3)
-(defconst context-coloring-OPEN-PARENTHESIS-CODE 4)
-(defconst context-coloring-CLOSE-PARENTHESIS-CODE 5)
-(defconst context-coloring-EXPRESSION-PREFIX-CODE 6)
-
-(defconst context-coloring-APOSTROPHE-CHAR (string-to-char "'"))
-(defconst context-coloring-OPEN-PARENTHESIS-CHAR (string-to-char "("))
-(defconst context-coloring-COMMA-CHAR (string-to-char ","))
-(defconst context-coloring-BACKTICK-CHAR (string-to-char "`"))
-
-(defvar context-coloring-parse-interruptable-p t
- "Set this to nil to force parse to continue until finished.")
-
-(defconst context-coloring-elisp-iterations-per-pause 1000
- "Pause after this many iterations to check for user input.
-If user input is pending, stop the parse. This makes for a
-smoother user experience for large files.
-
-As of this writing, emacs lisp colorization seems to run at about
-60,000 iterations per second. A default value of 1000 should
-provide visually \"instant\" updates at 60 frames per second.")
-
-(defun context-coloring-get-syntax-code ()
- (syntax-class (syntax-after (point))))
-
-(defvar context-coloring-elisp-scope-stack '())
-
-(defsubst context-coloring-elisp-make-scope (level)
- (list
- :level level
- :variables (make-hash-table :test 'equal)))
-
-(defsubst context-coloring-elisp-scope-get-level (scope)
- (plist-get scope :level))
-
-(defsubst context-coloring-elisp-scope-add-variable (scope variable)
- (puthash variable t (plist-get scope :variables)))
-
-(defsubst context-coloring-elisp-scope-get-variable (scope variable)
- (gethash variable (plist-get scope :variables)))
-
-(defsubst context-coloring-elisp-get-variable-level (variable)
- (let* ((scope-stack context-coloring-elisp-scope-stack)
- scope
- level)
- (while (and scope-stack (not level))
- (setq scope (car scope-stack))
- (cond
- ((context-coloring-elisp-scope-get-variable scope variable)
- (setq level (context-coloring-elisp-scope-get-level scope)))
- (t
- (setq scope-stack (cdr scope-stack)))))
- ;; Assume a global variable.
- (or level 0)))
-
-(defun context-coloring-elisp-push-scope ()
- (push (context-coloring-elisp-make-scope
- (1+ (context-coloring-elisp-current-scope-level)))
- context-coloring-elisp-scope-stack))
-
-(defun context-coloring-elisp-pop-scope ()
- (pop context-coloring-elisp-scope-stack))
-
-(defun context-coloring-elisp-add-variable (variable)
- (let ((current-scope (car context-coloring-elisp-scope-stack)))
- (context-coloring-elisp-scope-add-variable current-scope variable)))
-
-(defun context-coloring-elisp-current-scope-level ()
- (let ((current-scope (car context-coloring-elisp-scope-stack)))
- (cond
- (current-scope
- (context-coloring-elisp-scope-get-level current-scope))
- (t
- 0))))
-
-(defsubst context-coloring-elisp-make-let-varlist (type)
- (list
- :type type
- :vars '()))
-
-(defsubst context-coloring-elisp-let-varlist-get-type (let-varlist)
- (plist-get let-varlist :type))
-
-(defsubst context-coloring-elisp-let-varlist-get-vars (let-varlist)
- (plist-get let-varlist :vars))
-
-(defsubst context-coloring-elisp-let-varlist-set-vars (let-varlist vars)
- (plist-put let-varlist :vars vars))
-
-(defsubst context-coloring-elisp-let-varlist-add-var (let-varlist var)
- (plist-put let-varlist :vars (cons var (plist-get let-varlist :vars))))
-
-(defsubst context-coloring-elisp-let-varlist-pop-vars (let-varlist)
- (let* ((type (context-coloring-elisp-let-varlist-get-type let-varlist))
- (vars (context-coloring-elisp-let-varlist-get-vars let-varlist))
- (popped (cond
- ;; `let' binds all at once at the end.
- ((eq type 'let)
- (prog1
- vars
- (context-coloring-elisp-let-varlist-set-vars
- let-varlist '())))
- ;; `let*' binds incrementally.
- ((eq type 'let*)
- (prog1
- (list (car vars))
- (context-coloring-elisp-let-varlist-set-vars
- let-varlist (cdr vars)))))))
- (while popped
- (context-coloring-elisp-add-variable (car popped))
- (setq popped (cdr popped)))))
-
-(defun context-coloring-elisp-parse-arg (callback)
- (let (arg-pos
- arg-end
- arg-string)
- (setq arg-pos (point))
- (forward-sexp)
- (setq arg-end (point))
- (setq arg-string (buffer-substring-no-properties
- arg-pos
- arg-end))
- (when (string-match-p
- context-coloring-elisp-arglist-arg-regexp
- arg-string)
- (funcall callback arg-string))))
-
-(defun context-coloring-elisp-parse-let-varlist (type)
- (let ((let-varlist (context-coloring-elisp-make-let-varlist type))
- syntax-code)
- ;; Enter.
- (forward-char)
- (while (/= (progn
- (setq syntax-code (context-coloring-get-syntax-code))
- syntax-code)
- context-coloring-CLOSE-PARENTHESIS-CODE)
- (cond
- ((= syntax-code context-coloring-OPEN-PARENTHESIS-CODE)
- (forward-char)
- (context-coloring-forward-sws)
- (setq syntax-code (context-coloring-get-syntax-code))
- (when (or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- (context-coloring-elisp-parse-arg
- (lambda (var)
- (context-coloring-elisp-let-varlist-add-var let-varlist var)))
- (context-coloring-forward-sws)
- (setq syntax-code (context-coloring-get-syntax-code))
- (when (/= syntax-code context-coloring-CLOSE-PARENTHESIS-CODE)
- (context-coloring-elisp-colorize-sexp)))
- (context-coloring-forward-sws)
- ;; Skip past the closing parenthesis.
- (forward-char))
- ((or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- (context-coloring-elisp-parse-arg
- (lambda (var)
- (context-coloring-elisp-let-varlist-add-var let-varlist var)))))
- (when (eq type 'let*)
- (context-coloring-elisp-let-varlist-pop-vars let-varlist))
- (context-coloring-forward-sws))
- (when (eq type 'let)
- (context-coloring-elisp-let-varlist-pop-vars let-varlist))
- ;; Exit.
- (forward-char)))
-
-(defun context-coloring-elisp-parse-arglist ()
- (let (syntax-code)
- ;; Enter.
- (forward-char)
- (while (/= (progn
- (setq syntax-code (context-coloring-get-syntax-code))
- syntax-code)
- context-coloring-CLOSE-PARENTHESIS-CODE)
- (cond
- ((or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- (context-coloring-elisp-parse-arg
- (lambda (arg)
- (context-coloring-elisp-add-variable arg))))
- (t
- (forward-sexp)))
- (context-coloring-forward-sws))
- ;; Exit.
- (forward-char)))
-
-(defun context-coloring-elisp-colorize-defun (&optional anonymous-p
- let-type)
- (let ((start (point))
- end
- stop
- syntax-code
- defun-name-pos
- defun-name-end)
- (context-coloring-elisp-push-scope)
- ;; Color the whole sexp.
- (forward-sexp)
- (setq end (point))
- (context-coloring-colorize-region
- start
- end
- (context-coloring-elisp-current-scope-level))
- (goto-char start)
- ;; Skip past the "defun".
- (skip-syntax-forward "^w_")
- (forward-sexp)
- (context-coloring-forward-sws)
- (setq stop nil)
- (unless anonymous-p
- ;; Check for the defun's name.
- (setq syntax-code (context-coloring-get-syntax-code))
- (cond
- ((or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- ;; Color the defun's name with the top-level color.
- (setq defun-name-pos (point))
- (forward-sexp)
- (setq defun-name-end (point))
- (context-coloring-colorize-region defun-name-pos defun-name-end 0)
- (context-coloring-forward-sws))
- (t
- (setq stop t))))
- (cond
- (stop
- ;; Skip it.
- (goto-char start)
- (forward-sexp))
- (t
- (setq syntax-code (context-coloring-get-syntax-code))
- (cond
- ((= syntax-code context-coloring-OPEN-PARENTHESIS-CODE)
- (cond
- (let-type
- (context-coloring-elisp-parse-let-varlist let-type))
- (t
- (context-coloring-elisp-parse-arglist)))
- ;; Colorize the rest of the function.
- (context-coloring-elisp-colorize-region (point) (1- end))
- ;; Exit the defun.
- (forward-char))
- (t
- ;; Skip it.
- (goto-char start)
- (forward-sexp)))))
- (context-coloring-elisp-pop-scope)))
-
-(defun context-coloring-elisp-colorize-lambda ()
- (context-coloring-elisp-colorize-defun t))
-
-(defun context-coloring-elisp-colorize-let ()
- (context-coloring-elisp-colorize-defun t 'let))
-
-(defun context-coloring-elisp-colorize-let* ()
- (context-coloring-elisp-colorize-defun t 'let*))
-
-(defun context-coloring-elisp-colorize-parenthesized-sexp ()
- (let ((start (point))
- end
- syntax-code
- child-0-pos
- child-0-end
- child-0-string)
- (forward-sexp)
- (setq end (point))
- (goto-char start)
- (forward-char)
- (context-coloring-forward-sws)
- (setq syntax-code (context-coloring-get-syntax-code))
- ;; Figure out if the sexp is a special form.
- (cond
- ((or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- (setq child-0-pos (point))
- (forward-sexp)
- (setq child-0-end (point))
- (setq child-0-string (buffer-substring-no-properties
- child-0-pos
- child-0-end))
- (cond
- ((string-match-p context-coloring-elisp-defun-regexp child-0-string)
- (goto-char start)
- (context-coloring-elisp-colorize-defun))
- ((string-match-p context-coloring-elisp-lambda-regexp child-0-string)
- (goto-char start)
- (context-coloring-elisp-colorize-lambda))
- ((string-match-p context-coloring-elisp-let-regexp child-0-string)
- (goto-char start)
- (context-coloring-elisp-colorize-let))
- ((string-match-p context-coloring-elisp-let*-regexp child-0-string)
- (goto-char start)
- (context-coloring-elisp-colorize-let*))
- ;; Not a special form; just colorize the remaining region.
- (t
- (context-coloring-colorize-region
- start
- end
- (context-coloring-elisp-current-scope-level))
- (context-coloring-elisp-colorize-region (point) (1- end))
- (forward-char))))
- (t
- ;; Skip it.
- (goto-char start)
- (forward-sexp)))))
-
-(defun context-coloring-elisp-colorize-symbol ()
- (let (symbol-pos
- symbol-end
- symbol-string)
- (setq symbol-pos (point))
- (forward-sexp)
- (setq symbol-end (point))
- (setq symbol-string (buffer-substring-no-properties
- symbol-pos
- symbol-end))
- (cond
- ((string-match-p context-coloring-ignored-word-regexp symbol-string))
- (t
- (context-coloring-colorize-region
- symbol-pos
- symbol-end
- (context-coloring-elisp-get-variable-level
- symbol-string))))))
-
-(defun context-coloring-elisp-colorize-expression-prefix ()
- (let (start
- end
- char)
- (setq char (char-after))
- (cond
- ((= char context-coloring-APOSTROPHE-CHAR)
- (forward-sexp))
- ((= char context-coloring-BACKTICK-CHAR)
- (setq start (point))
- (forward-sexp)
- (setq end (point))
- (goto-char start)
- (while (> end (progn (forward-char)
- (point)))
- (setq char (char-after))
- (when (= char context-coloring-COMMA-CHAR)
- (forward-char)
- (context-coloring-forward-sws)
- (context-coloring-elisp-colorize-sexp)))))))
-
-(defun context-coloring-elisp-colorize-sexp ()
- (let (syntax-code)
- (setq syntax-code (context-coloring-get-syntax-code))
- (cond
- ((= syntax-code context-coloring-OPEN-PARENTHESIS-CODE)
- (context-coloring-elisp-colorize-parenthesized-sexp))
- ((or (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE))
- (context-coloring-elisp-colorize-symbol))
- ((= syntax-code context-coloring-EXPRESSION-PREFIX-CODE)
- (context-coloring-elisp-colorize-expression-prefix))
- (t
- (forward-char)))))
-
-(defun context-coloring-elisp-colorize-region (start end)
- (let (syntax-code)
- (goto-char start)
- (while (> end (progn (skip-syntax-forward "^()w_'" end)
- (point)))
- (setq syntax-code (context-coloring-get-syntax-code))
- (cond
- ((or (= syntax-code context-coloring-OPEN-PARENTHESIS-CODE)
- (= syntax-code context-coloring-WORD-CODE)
- (= syntax-code context-coloring-SYMBOL-CODE)
- (= syntax-code context-coloring-EXPRESSION-PREFIX-CODE))
- (context-coloring-elisp-colorize-sexp))
- (t
- (forward-char))))))
-
-(defun context-coloring-elisp-colorize-changed-region (start end)
- (with-silent-modifications
- (save-excursion
- (let ((start (progn (goto-char start)
- (beginning-of-defun)
- (point)))
- (end (progn (goto-char end)
- (end-of-defun)
- (point))))
- (setq context-coloring-elisp-scope-stack '())
- (context-coloring-elisp-colorize-region start end)))))
-
-(defun context-coloring-elisp-colorize-buffer ()
- (interactive)
- (with-silent-modifications
- (save-excursion
- (setq context-coloring-elisp-scope-stack '())
- (context-coloring-elisp-colorize-region (point-min) (point-max)))))
-
-(defalias 'ccecb 'context-coloring-elisp-colorize-buffer)
-
-
-;;; Shell command scopification / colorization
-
-(defun context-coloring-apply-tokens (tokens)
- "Process a vector of TOKENS to apply context-based coloring to
-the current buffer. Tokens are 3 integers: start, end, level.
-The vector is flat, with a new token occurring after every 3rd
-element."
- (with-silent-modifications
- (let ((i 0)
- (len (length tokens)))
- (while (< i len)
- (context-coloring-colorize-region
- (elt tokens i)
- (elt tokens (+ i 1))
- (elt tokens (+ i 2)))
- (setq i (+ i 3))))
- (context-coloring-maybe-colorize-comments-and-strings)))
-
-(defun context-coloring-parse-array (array)
- "Parse ARRAY as a flat JSON array of numbers."
- (let ((braceless (substring (context-coloring-trim array) 1 -1)))
- (cond
- ((> (length braceless) 0)
- (vconcat
- (mapcar 'string-to-number (split-string braceless ","))))
- (t
- (vector)))))
-
-(defvar-local context-coloring-scopifier-process nil
- "The single scopifier process that can be running.")
-
-(defun context-coloring-kill-scopifier ()
- "Kill the currently-running scopifier process."
- (when (not (null context-coloring-scopifier-process))
- (delete-process context-coloring-scopifier-process)
- (setq context-coloring-scopifier-process nil)))
-
-(defun context-coloring-scopify-shell-command (command callback)
- "Invoke a scopifier via COMMAND, read its response
-asynchronously and invoke CALLBACK with its output."
-
- ;; Prior running tokenization is implicitly obsolete if this function is
- ;; called.
- (context-coloring-kill-scopifier)
-
- ;; Start the process.
- (setq context-coloring-scopifier-process
- (start-process-shell-command "scopifier" nil command))
-
- (let ((output ""))
-
- ;; The process may produce output in multiple chunks. This filter
- ;; accumulates the chunks into a message.
- (set-process-filter
- context-coloring-scopifier-process
- (lambda (_process chunk)
- (setq output (concat output chunk))))
-
- ;; When the process's message is complete, this sentinel parses it as JSON
- ;; and applies the tokens to the buffer.
- (set-process-sentinel
- context-coloring-scopifier-process
- (lambda (_process event)
- (when (equal "finished\n" event)
- (funcall callback output))))))
-
-(defun context-coloring-send-buffer-to-scopifier ()
- "Give the scopifier process its input so it can begin
-scopifying."
- (process-send-region
- context-coloring-scopifier-process
- (point-min) (point-max))
- (process-send-eof
- context-coloring-scopifier-process))
-
-(defun context-coloring-scopify-and-colorize (command &optional callback)
- "Invoke a scopifier via COMMAND with the current buffer's contents,
-read the scopifier's response asynchronously and apply a parsed
-list of tokens to `context-coloring-apply-tokens'.
-
-Invoke CALLBACK when complete."
- (let ((buffer (current-buffer)))
- (context-coloring-scopify-shell-command
- command
- (lambda (output)
- (let ((tokens (context-coloring-parse-array output)))
- (with-current-buffer buffer
- (context-coloring-apply-tokens tokens))
- (setq context-coloring-scopifier-process nil)
- (when callback (funcall callback))))))
- (context-coloring-send-buffer-to-scopifier))
-
;;; Dispatch
-(defvar context-coloring-dispatch-hash-table (make-hash-table :test 'eq)
- "Map dispatch strategy names to their corresponding property
- lists, which contain details about the strategies.")
-
-(defvar context-coloring-mode-hash-table (make-hash-table :test 'eq)
- "Map major mode names to dispatch property lists.")
-
-(defun context-coloring-get-dispatch-for-mode (mode)
- "Return the dispatch for MODE (or a derivative mode)."
- (let ((parent mode)
- dispatch)
- (while (and parent
- (not (setq dispatch (gethash parent context-coloring-mode-hash-table)))
- (setq parent (get parent 'derived-mode-parent))))
- dispatch))
-
-(defun context-coloring-define-dispatch (symbol &rest properties)
- "Define a new dispatch named SYMBOL with PROPERTIES.
+;;;###autoload
+(defvar context-coloring-dispatch-hash-table (make-hash-table :test #'eq)
+ "Map dispatch strategy names to their property lists.
A \"dispatch\" is a property list describing a strategy for
-coloring a buffer. There are three possible strategies: Parse
-and color in a single function (`:colorizer'), parse in a
-function that returns scope data (`:scopifier'), or parse with a
-shell command that returns scope data (`:command'). In the
-latter two cases, the scope data will be used to automatically
-color the buffer.
+coloring a buffer.
-PROPERTIES must include `:modes' and one of `:colorizer',
-`:scopifier' or `:command'.
+Its properties must include one of `:modes' or `:predicate', and
+a `:colorizer'.
`:modes' - List of major modes this dispatch is valid for.
-`:colorizer' - Symbol referring to a function that parses and
-colors the buffer.
+`:predicate' - Function that determines if the dispatch is valid
+for any given state.
-`:scopifier' - Symbol referring to a function that parses the
-buffer a returns a flat vector of start, end and level data.
+`:colorizer' - Function that parses and colors the buffer.
-`:executable' - Optional name of an executable required by
-`:command'.
-
-`:command' - Shell command to execute with the current buffer
-sent via stdin, and with a flat JSON array of start, end and
-level data returned via stdout.
-
-`:version' - Minimum required version that should be printed when
-executing `:command' with a \"--version\" flag. The version
-should be numeric, e.g. \"2\", \"19700101\", \"1.2.3\",
-\"v1.2.3\" etc.
+`:delay' - Delay between buffer update and colorization, to
+override `context-coloring-default-delay'.
`:setup' - Arbitrary code to set up this dispatch when
`context-coloring-mode' is enabled.
`:teardown' - Arbitrary code to tear down this dispatch when
-`context-coloring-mode' is disabled."
- (let ((modes (plist-get properties :modes))
- (colorizer (plist-get properties :colorizer))
- (scopifier (plist-get properties :scopifier))
- (command (plist-get properties :command)))
- (when (null modes)
- (error "No mode defined for dispatch"))
- (when (not (or colorizer
- scopifier
- command))
- (error "No colorizer, scopifier or command defined for dispatch"))
- (puthash symbol properties context-coloring-dispatch-hash-table)
- (dolist (mode modes)
- (puthash mode properties context-coloring-mode-hash-table))))
-
+`context-coloring-mode' is disabled.")
+
+(defun context-coloring-find-dispatch (predicate)
+ "Find the first dispatch satisfying PREDICATE."
+ (let (found)
+ (maphash
+ (lambda (_ dispatch)
+ (when (and (not found)
+ (funcall predicate dispatch))
+ (setq found dispatch)))
+ context-coloring-dispatch-hash-table)
+ found))
-;;; Colorization
+(defun context-coloring-get-current-dispatch ()
+ "Return the first dispatch appropriate for the current state."
+ (cond
+ ;; Maybe a predicate will be satisfied.
+ ((context-coloring-find-dispatch
+ (lambda (dispatch)
+ (let ((predicate (plist-get dispatch :predicate)))
+ (and predicate (funcall predicate))))))
+ ;; If not, maybe a major mode (or a derivative) will.
+ ((context-coloring-find-dispatch
+ (lambda (dispatch)
+ (let ((modes (plist-get dispatch :modes))
+ match)
+ (while (and modes (not match))
+ (setq match (eq (pop modes) major-mode)))
+ match))))))
+
+(defun context-coloring-before-colorize ()
+ "Set up environment for colorization."
+ (context-coloring-update-maximum-face))
+
+(defun context-coloring-dispatch ()
+ "Determine how to color the current buffer, and color it."
+ (let* ((dispatch (context-coloring-get-current-dispatch))
+ (colorizer (plist-get dispatch :colorizer)))
+ (context-coloring-before-colorize)
+ (when colorizer
+ (catch 'interrupted
+ (funcall colorizer)))))
-(defvar context-coloring-colorize-hook nil
- "Hooks to run after coloring a buffer.")
-(defun context-coloring-colorize (&optional callback)
- "Color the current buffer by function context.
+;;; Colorization
-Invoke CALLBACK when complete; see `context-coloring-dispatch'."
+(defun context-coloring-colorize ()
+ "Color the current buffer by function context."
(interactive)
- (context-coloring-dispatch
- (lambda ()
- (when callback (funcall callback))
- (run-hooks 'context-coloring-colorize-hook))))
-
-(defvar-local context-coloring-changed nil
- "Indication that the buffer has changed recently, which implies
-that it should be colored again by
-`context-coloring-colorize-idle-timer' if that timer is being
-used.")
-
-(defun context-coloring-change-function (_start _end _length)
- "Register a change so that a buffer can be colorized soon."
- ;; Tokenization is obsolete if there was a change.
- (context-coloring-kill-scopifier)
- (setq context-coloring-changed t))
+ (context-coloring-dispatch))
-(defun context-coloring-maybe-colorize (buffer)
- "Colorize the current buffer if it has changed."
- (when (and (eq buffer (current-buffer))
- context-coloring-changed)
- (setq context-coloring-changed nil)
- (context-coloring-colorize)))
-
-
-;;; Versioning
-
-(defun context-coloring-parse-version (string)
- "Extract segments of a version STRING into a list. \"v1.0.0\"
-produces (1 0 0), \"19700101\" produces (19700101), etc."
- (let (version)
- (while (string-match "[0-9]+" string)
- (setq version (append version
- (list (string-to-number (match-string 0 string)))))
- (setq string (substring string (match-end 0))))
- version))
-
-(defun context-coloring-check-version (expected actual)
- "Check that version EXPECTED is less than or equal to ACTUAL."
- (let ((expected (context-coloring-parse-version expected))
- (actual (context-coloring-parse-version actual))
- (continue t)
- (acceptable t))
- (while (and continue expected)
- (let ((an-expected (car expected))
- (an-actual (car actual)))
- (cond
- ((> an-actual an-expected)
- (setq acceptable t)
- (setq continue nil))
- ((< an-actual an-expected)
- (setq acceptable nil)
- (setq continue nil))))
- (setq expected (cdr expected))
- (setq actual (cdr actual)))
- acceptable))
-
-(defvar context-coloring-check-scopifier-version-hook nil
- "Hooks to run after checking the scopifier version.")
-
-(defun context-coloring-check-scopifier-version (&optional callback)
- "Asynchronously invoke CALLBACK with a predicate indicating
-whether the current scopifier version satisfies the minimum
-version number required for the current major mode."
- (let ((dispatch (context-coloring-get-dispatch-for-mode major-mode)))
- (when dispatch
- (let ((version (plist-get dispatch :version))
- (command (plist-get dispatch :command)))
- (context-coloring-scopify-shell-command
- (context-coloring-join (list command "--version") " ")
- (lambda (output)
- (if (context-coloring-check-version version output)
- (progn
- (when callback (funcall callback t)))
- (when callback (funcall callback nil)))
- (run-hooks 'context-coloring-check-scopifier-version-hook)))))))
-
-
-;;; Themes
-
-(defvar context-coloring-theme-hash-table (make-hash-table :test 'eq)
- "Map theme names to theme properties.")
-
-(defun context-coloring-theme-p (theme)
- "Return t if THEME is defined, nil otherwise."
- (and (gethash theme context-coloring-theme-hash-table)))
-
-(defconst context-coloring-level-face-regexp
- "context-coloring-level-\\([[:digit:]]+\\)-face"
- "Extract a level from a face.")
+(defun context-coloring-colorize-with-buffer (buffer)
+ "Color BUFFER."
+ ;; Don't select deleted buffers.
+ (when (get-buffer buffer)
+ (with-current-buffer buffer
+ (context-coloring-colorize))))
-(defvar context-coloring-originally-set-theme-hash-table
- (make-hash-table :test 'eq)
- "Cache custom themes who originally set their own
- `context-coloring-level-N-face' faces.")
-
-(defun context-coloring-theme-originally-set-p (theme)
- "Return t if there is a `context-coloring-level-N-face'
-originally set for THEME, nil otherwise."
- (let (originally-set)
- (cond
- ;; `setq' might return a non-nil value for the sake of this `cond'.
- ((setq
- originally-set
- (gethash
- theme
- context-coloring-originally-set-theme-hash-table))
- (eq originally-set 'yes))
- (t
- (let* ((settings (get theme 'theme-settings))
- (tail settings)
- found)
- (while (and tail (not found))
- (and (eq (nth 0 (car tail)) 'theme-face)
- (string-match
- context-coloring-level-face-regexp
- (symbol-name (nth 1 (car tail))))
- (setq found t))
- (setq tail (cdr tail)))
- found)))))
-
-(defun context-coloring-cache-originally-set (theme originally-set)
- "Remember if THEME had colors originally set for it. If
-ORIGINALLY-SET is non-nil, it did, otherwise it didn't."
- ;; Caching whether a theme was originally set is kind of dirty, but we have to
- ;; do it to remember the past state of the theme. There are probably some
- ;; edge cases where caching will be an issue, but they are probably rare.
- (puthash
- theme
- (if originally-set 'yes 'no)
- context-coloring-originally-set-theme-hash-table))
-
-(defun context-coloring-warn-theme-originally-set (theme)
- "Warn the user that the colors for THEME are already originally
-set."
- (warn "Context coloring colors for theme `%s' are already defined" theme))
-(defun context-coloring-theme-highest-level (theme)
- "Return the highest level N of a face like
-`context-coloring-level-N-face' set for THEME, or `-1' if there
-is none."
- (let* ((settings (get theme 'theme-settings))
- (tail settings)
- face-string
- number
- (found -1))
- (while tail
- (and (eq (nth 0 (car tail)) 'theme-face)
- (setq face-string (symbol-name (nth 1 (car tail))))
- (string-match
- context-coloring-level-face-regexp
- face-string)
- (setq number (string-to-number
- (substring face-string
- (match-beginning 1)
- (match-end 1))))
- (> number found)
- (setq found number))
- (setq tail (cdr tail)))
- found))
-
-(defun context-coloring-apply-theme (theme)
- "Apply THEME's properties to its respective custom theme,
-which must already exist and which *should* already be enabled."
- (let* ((properties (gethash theme context-coloring-theme-hash-table))
- (colors (plist-get properties :colors))
- (level -1))
- ;; Only clobber when we have to.
- (when (custom-theme-enabled-p theme)
- (setq context-coloring-maximum-face (- (length colors) 1)))
- (apply
- 'custom-theme-set-faces
- theme
- (mapcar
- (lambda (color)
- (setq level (+ level 1))
- `(,(context-coloring-level-face level) ((t (:foreground ,color)))))
- colors))))
-
-(defun context-coloring-define-theme (theme &rest properties)
- "Define a context theme named THEME for coloring scope levels.
-
-PROPERTIES is a property list specifiying the following details:
-
-`:aliases': List of symbols of other custom themes that these
-colors are applicable to.
-
-`:colors': List of colors that this context theme uses.
-
-`:override': If non-nil, this context theme is intentionally
-overriding colors set by a custom theme. Don't set this non-nil
-unless there is a custom theme you want to use which sets
-`context-coloring-level-N-face' faces that you want to replace.
-
-`:recede': If non-nil, this context theme should not apply its
-colors if a custom theme already sets
-`context-coloring-level-N-face' faces. This option is
-optimistic; set this non-nil if you would rather confer the duty
-of picking colors to a custom theme author (if / when he ever
-gets around to it).
-
-By default, context themes will always override custom themes,
-even if those custom themes set `context-coloring-level-N-face'
-faces. If a context theme does override a custom theme, a
-warning will be raised, at which point you may want to enable the
-`:override' option, or just delete your context theme and opt to
-use your custom theme's author's colors instead.
-
-Context themes only work for the custom theme with the highest
-precedence, i.e. the car of `custom-enabled-themes'."
- (let ((aliases (plist-get properties :aliases))
- (override (plist-get properties :override))
- (recede (plist-get properties :recede)))
- (dolist (name (append `(,theme) aliases))
- (puthash name properties context-coloring-theme-hash-table)
- (when (custom-theme-p name)
- (let ((originally-set (context-coloring-theme-originally-set-p name)))
- (context-coloring-cache-originally-set name originally-set)
- ;; In the particular case when you innocently define colors that a
- ;; custom theme originally set, warn. Arguably this only has to be
- ;; done at enable time, but it is probably more useful to do it at
- ;; definition time for prompter feedback.
- (when (and originally-set
- (not recede)
- (not override))
- (context-coloring-warn-theme-originally-set name))
- ;; Set (or overwrite) colors.
- (when (not (and originally-set
- recede))
- (context-coloring-apply-theme name)))))))
-
-(defun context-coloring-enable-theme (theme)
- "Apply THEME if its colors are not already set, else just set
-`context-coloring-maximum-face' to the correct value for THEME."
- (let* ((properties (gethash theme context-coloring-theme-hash-table))
- (recede (plist-get properties :recede))
- (override (plist-get properties :override)))
- (cond
- (recede
- (let ((highest-level (context-coloring-theme-highest-level theme)))
- (cond
- ;; This can be true whether originally set by a custom theme or by a
- ;; context theme.
- ((> highest-level -1)
- (setq context-coloring-maximum-face highest-level))
- ;; It is possible that the corresponding custom theme did not exist at
- ;; the time of defining this context theme, and in that case the above
- ;; condition proves the custom theme did not originally set any faces,
- ;; so we have license to apply the context theme for the first time
- ;; here.
- (t
- (context-coloring-apply-theme theme)))))
- (t
- (let ((originally-set (context-coloring-theme-originally-set-p theme)))
- ;; Cache now in case the context theme was defined after the custom
- ;; theme.
- (context-coloring-cache-originally-set theme originally-set)
- (when (and originally-set
- (not override))
- (context-coloring-warn-theme-originally-set theme))
- (context-coloring-apply-theme theme))))))
-
-(defadvice enable-theme (after context-coloring-enable-theme (theme) activate)
- "Enable colors for context themes just-in-time."
- (when (and (not (eq theme 'user)) ; Called internally by `enable-theme'.
- (custom-theme-p theme) ; Guard against non-existent themes.
- (context-coloring-theme-p theme))
- (when (= (length custom-enabled-themes) 1)
- ;; Cache because we can't reliably figure it out in reverse.
- (setq context-coloring-original-maximum-face
- context-coloring-maximum-face))
- (context-coloring-enable-theme theme)))
-
-(defadvice disable-theme (after context-coloring-disable-theme (theme) activate)
- "Update `context-coloring-maximum-face'."
- (when (custom-theme-p theme) ; Guard against non-existent themes.
- (let ((enabled-theme (car custom-enabled-themes)))
- (if (context-coloring-theme-p enabled-theme)
- (progn
- (context-coloring-enable-theme enabled-theme))
- ;; Assume we are back to no theme; act as if nothing ever happened.
- ;; This is still prone to intervention, but rather extraordinarily.
- (setq context-coloring-maximum-face
- context-coloring-original-maximum-face)))))
-
-(context-coloring-define-theme
- 'ample
- :recede t
- :colors '("#bdbdb3"
- "#baba36"
- "#6aaf50"
- "#5180b3"
- "#ab75c3"
- "#cd7542"
- "#df9522"
- "#454545"))
-
-(context-coloring-define-theme
- 'anti-zenburn
- :recede t
- :colors '("#232333"
- "#6c1f1c"
- "#401440"
- "#0f2050"
- "#205070"
- "#336c6c"
- "#23733c"
- "#6b400c"
- "#603a60"
- "#2f4070"
- "#235c5c"))
-
-(context-coloring-define-theme
- 'grandshell
- :recede t
- :colors '("#bebebe"
- "#5af2ee"
- "#b2baf6"
- "#f09fff"
- "#efc334"
- "#f6df92"
- "#acfb5a"
- "#888888"))
-
-(context-coloring-define-theme
- 'leuven
- :recede t
- :colors '("#333333"
- "#0000ff"
- "#6434a3"
- "#ba36a5"
- "#d0372d"
- "#036a07"
- "#006699"
- "#006fe0"
- "#808080"))
-
-(context-coloring-define-theme
- 'monokai
- :recede t
- :colors '("#f8f8f2"
- "#66d9ef"
- "#a1efe4"
- "#a6e22e"
- "#e6db74"
- "#fd971f"
- "#f92672"
- "#fd5ff0"
- "#ae81ff"))
-
-(context-coloring-define-theme
- 'solarized
- :recede t
- :aliases '(solarized-light
- solarized-dark
- sanityinc-solarized-light
- sanityinc-solarized-dark)
- :colors '("#839496"
- "#268bd2"
- "#2aa198"
- "#859900"
- "#b58900"
- "#cb4b16"
- "#dc322f"
- "#d33682"
- "#6c71c4"
- "#69b7f0"
- "#69cabf"
- "#b4c342"
- "#deb542"
- "#f2804f"
- "#ff6e64"
- "#f771ac"
- "#9ea0e5"))
-
-(context-coloring-define-theme
- 'spacegray
- :recede t
- :colors '("#ffffff"
- "#89aaeb"
- "#c189eb"
- "#bf616a"
- "#dca432"
- "#ebcb8b"
- "#b4eb89"
- "#89ebca"))
-
-(context-coloring-define-theme
- 'tango
- :recede t
- :colors '("#2e3436"
- "#346604"
- "#204a87"
- "#5c3566"
- "#a40000"
- "#b35000"
- "#c4a000"
- "#8ae234"
- "#8cc4ff"
- "#ad7fa8"
- "#ef2929"
- "#fcaf3e"
- "#fce94f"))
-
-(context-coloring-define-theme
- 'zenburn
- :recede t
- :colors '("#dcdccc"
- "#93e0e3"
- "#bfebbf"
- "#f0dfaf"
- "#dfaf8f"
- "#cc9393"
- "#dc8cc3"
- "#94bff3"
- "#9fc59f"
- "#d0bf8f"
- "#dca3a3"))
-
-
-;;; Change detection
-
-(defvar-local context-coloring-colorize-idle-timer nil
- "The currently-running idle timer.")
-
-(defcustom context-coloring-delay 0.25
- "Delay between a buffer update and colorization.
+;;; Minor mode
-Increase this if your machine is high-performing. Decrease it if
-it ain't.
+(defvar context-coloring-ignore-unavailable-predicates
+ (list
+ #'minibufferp)
+ "Cases when \"unavailable\" messages are silenced.
+Necessary in editing states where coloring is only sometimes
+permissible.")
+
+(defun context-coloring-ignore-unavailable-message-p ()
+ "Determine if the unavailable message should be silenced."
+ (let ((predicates context-coloring-ignore-unavailable-predicates)
+ (ignore-p nil))
+ (while (and predicates
+ (not ignore-p))
+ (setq ignore-p (funcall (pop predicates))))
+ ignore-p))
+
+(defvar context-coloring-interruptable-p t
+ "When non-nil, coloring may be interrupted by user input.")
-Supported modes: `js-mode', `js3-mode', `emacs-lisp-mode'"
- :group 'context-coloring)
+;;;###autoload
+(define-minor-mode context-coloring-mode
+ "Toggle contextual code coloring.
+With a prefix argument ARG, enable Context Coloring mode if ARG
+is positive, and disable it otherwise. If called from Lisp,
+enable the mode if ARG is omitted or nil.
-(defun context-coloring-setup-idle-change-detection ()
- "Setup idle change detection."
- (add-hook
- 'after-change-functions 'context-coloring-change-function nil t)
- (add-hook
- 'kill-buffer-hook 'context-coloring-teardown-idle-change-detection nil t)
- (setq context-coloring-colorize-idle-timer
- (run-with-idle-timer
- context-coloring-delay
- t
- 'context-coloring-maybe-colorize
- (current-buffer))))
+Context Coloring mode is a buffer-local minor mode. When
+enabled, code is colored by scope. Scopes are colored
+hierarchically. Variables referenced from nested scopes retain
+the color of their defining scopes. Certain syntax, like
+comments and strings, is still colored with `font-lock'.
-(defun context-coloring-teardown-idle-change-detection ()
- "Teardown idle change detection."
- (context-coloring-kill-scopifier)
- (when context-coloring-colorize-idle-timer
- (cancel-timer context-coloring-colorize-idle-timer))
- (remove-hook
- 'kill-buffer-hook 'context-coloring-teardown-idle-change-detection t)
- (remove-hook
- 'after-change-functions 'context-coloring-change-function t))
-
-
-;;; Built-in dispatches
-
-(context-coloring-define-dispatch
- 'javascript-node
- :modes '(js-mode js3-mode)
- :executable "scopifier"
- :command "scopifier"
- :version "v1.1.1")
-
-(context-coloring-define-dispatch
- 'javascript-js2
- :modes '(js2-mode)
- :colorizer 'context-coloring-js2-colorize
- :setup
- (lambda ()
- (add-hook 'js2-post-parse-callbacks 'context-coloring-colorize nil t))
- :teardown
- (lambda ()
- (remove-hook 'js2-post-parse-callbacks 'context-coloring-colorize t)))
-
-(context-coloring-define-dispatch
- 'emacs-lisp
- :modes '(emacs-lisp-mode)
- :colorizer 'context-coloring-elisp-colorize-buffer
- :setup 'context-coloring-setup-idle-change-detection
- :teardown 'context-coloring-teardown-idle-change-detection)
-
-(defun context-coloring-dispatch (&optional callback)
- "Determine the optimal track for scopification / coloring of
-the current buffer, then execute it.
-
-Invoke CALLBACK when complete. It is invoked synchronously for
-elisp tracks, and asynchronously for shell command tracks."
- (let* ((dispatch (context-coloring-get-dispatch-for-mode major-mode))
- (colorizer (plist-get dispatch :colorizer))
- (scopifier (plist-get dispatch :scopifier))
- (command (plist-get dispatch :command))
- interrupted-p)
- (cond
- ((or colorizer scopifier)
- (setq interrupted-p
- (catch 'interrupted
- (cond
- (colorizer
- (funcall colorizer))
- (scopifier
- (context-coloring-apply-tokens (funcall scopifier))))))
- (cond
- (interrupted-p
- (setq context-coloring-changed t))
- (t
- (when callback (funcall callback)))))
- (command
- (context-coloring-scopify-and-colorize command callback)))))
+The entire buffer is colored initially. Changes to the buffer
+trigger recoloring.
+Define your own colors by customizing faces like
+`context-coloring-level-N-face', where N is a number starting
+from 0. If no face is found on a custom theme nor the `user'
+theme, the defaults are used.
-;;; Minor mode
+New language / major mode support can be added with
+`context-coloring-define-dispatch', which see.
-;;;###autoload
-(define-minor-mode context-coloring-mode
- "Context-based code coloring, inspired by Douglas Crockford."
+Feature inspired by Douglas Crockford."
nil " Context" nil
- (if (not context-coloring-mode)
- (progn
- (let ((dispatch (context-coloring-get-dispatch-for-mode major-mode)))
- (when dispatch
- (let ((command (plist-get dispatch :command))
- (teardown (plist-get dispatch :teardown)))
- (when command
- (context-coloring-teardown-idle-change-detection))
- (when teardown
- (funcall teardown)))))
- (font-lock-mode)
- (jit-lock-mode t))
-
- ;; Font lock is incompatible with this mode; the converse is also true.
- (font-lock-mode 0)
- (jit-lock-mode nil)
-
- ;; ...but we do use font-lock functions here.
- (font-lock-set-defaults)
-
- ;; Safely change the valye of this function as necessary.
- (make-local-variable 'font-lock-syntactic-face-function)
-
- (let ((dispatch (context-coloring-get-dispatch-for-mode major-mode)))
- (if dispatch
- (progn
- (let ((command (plist-get dispatch :command))
- (version (plist-get dispatch :version))
- (executable (plist-get dispatch :executable))
- (setup (plist-get dispatch :setup))
- (colorize-initially-p t))
- (when command
- ;; Shell commands recolor on change, idly.
- (cond
- ((and executable
- (null (executable-find executable)))
- (message "Executable \"%s\" not found" executable)
- (setq colorize-initially-p nil))
- (version
- (context-coloring-check-scopifier-version
- (lambda (sufficient-p)
- (if sufficient-p
- (progn
- (context-coloring-setup-idle-change-detection)
- (context-coloring-colorize))
- (message "Update to the minimum version of \"%s\" (%s)"
- executable version))))
- (setq colorize-initially-p nil))
- (t
- (context-coloring-setup-idle-change-detection))))
- (when setup
- (funcall setup))
- ;; Colorize once initially.
- (when colorize-initially-p
- (let ((context-coloring-parse-interruptable-p nil))
- (context-coloring-colorize)))))
- (when (null dispatch)
- (message "Context coloring is not available for this major mode"))))))
+ (cond
+ (context-coloring-mode
+ (let ((dispatch (context-coloring-get-current-dispatch)))
+ (cond
+ (dispatch
+ ;; Font lock is incompatible with this mode; the converse is also true.
+ (font-lock-mode 0)
+ ;; ...but we do use font-lock functions here.
+ (font-lock-set-defaults)
+ ;; Safely change the value of this function as necessary.
+ (make-local-variable 'font-lock-syntactic-face-function)
+ (let ((setup (plist-get dispatch :setup)))
+ (when setup
+ (funcall setup))
+ ;; Colorize once initially.
+ (let ((context-coloring-interruptable-p nil))
+ (context-coloring-colorize))))
+ ((not (context-coloring-ignore-unavailable-message-p))
+ (message "Context coloring is unavailable here")))))
+ (t
+ (let ((dispatch (context-coloring-get-current-dispatch)))
+ (when dispatch
+ (let ((teardown (plist-get dispatch :teardown)))
+ (when teardown
+ (funcall teardown)))))
+ (turn-on-font-lock-if-desired))))
(provide 'context-coloring)