;;; cpp.el --- Highlight or hide text according to cpp conditionals.
-;; Copyright (C) 1994 Free Software Foundation
+;; Copyright (C) 1994, 1995 Free Software Foundation
;; Author: Per Abrahamsen <abraham@iesd.auc.dk>
;; Keywords: c, faces, tools
(defvar cpp-unknown-writable t
"*Non-nil means you are allowed to modify the unknown conditionals.")
+(defvar cpp-edit-list nil
+ "Alist of cpp macros and information about how they should be displayed.
+Each entry is a list with the following elements:
+0. The name of the macro (a string).
+1. Face used for text that is `ifdef' the macro.
+2. Face used for text that is `ifndef' the macro.
+3. `t', `nil', or `both' depending on what text may be edited.")
+
+(defvar cpp-overlay-list nil)
+;; List of cpp overlays active in the current buffer.
+(make-variable-buffer-local 'cpp-overlay-list)
+
+(defvar cpp-callback-data)
+(defvar cpp-state-stack)
+
+(defconst cpp-face-type-list
+ '(("light color background" . light)
+ ("dark color background" . dark)
+ ("monochrome" . mono)
+ ("tty" . none))
+ "Alist of strings and names of the defined face collections.")
+
+(defconst cpp-writable-list
+ ;; Names used for the writable property.
+ '(("writable" . t)
+ ("read-only" . nil)))
+
+(defvar cpp-button-event nil)
+;; This will be t in the callback for `cpp-make-button'.
+
+(defvar cpp-edit-buffer nil)
+;; Real buffer whose cpp display information we are editing.
+(make-variable-buffer-local 'cpp-edit-buffer)
+
+(defconst cpp-branch-list
+ ;; Alist of branches.
+ '(("false" . nil)
+ ("true" . t)
+ ("both" . both)))
+
+(defvar cpp-face-default-list nil
+ "List of faces you can choose from for cpp conditionals.")
+
+(defvar cpp-face-light-name-list
+ '("light gray" "light blue" "light cyan" "light yellow" "light pink"
+ "pale green" "beige" "orange" "magenta" "violet" "medium purple"
+ "turquoise")
+ "Background colours useful with dark foreground colors.")
+
+(defvar cpp-face-dark-name-list
+ '("dim gray" "blue" "cyan" "yellow" "red"
+ "dark green" "brown" "dark orange" "dark khaki" "dark violet" "purple"
+ "dark turquoise")
+ "Background colours useful with light foreground colors.")
+
+(defvar cpp-face-light-list nil
+ "Alist of names and faces to be used for light backgrounds.")
+
+(defvar cpp-face-dark-list nil
+ "Alist of names and faces to be used for dark backgrounds.")
+
+(defvar cpp-face-mono-list
+ '(("bold" . 'bold)
+ ("bold-italic" . 'bold-italic)
+ ("italic" . 'italic)
+ ("underline" . 'underline))
+ "Alist of names and faces to be used for monocrome screens.")
+
+(defvar cpp-face-none-list
+ '(("default" . default)
+ ("invisible" . invisible))
+ "Alist of names and faces available even if you don't use a window system.")
+
+(defvar cpp-face-all-list
+ (append cpp-face-light-list
+ cpp-face-dark-list
+ cpp-face-mono-list
+ cpp-face-none-list)
+ "All faces used for highligting text inside cpp conditionals.")
+
;;; Parse Buffer:
(defvar cpp-parse-symbols nil
(cpp-parse-reset)
(if (null cpp-edit-list)
(cpp-edit-load))
- (let (stack)
+ (let (cpp-state-stack)
(save-excursion
(goto-char (point-min))
(cpp-progress-message "Parsing...")
(cpp-parse-close from to))
(cpp-parse-open t expr from to))
((string-equal type "else")
- (or stack (cpp-parse-error "Top level #else"))
- (let ((entry (list (not (nth 0 (car stack)))
- (nth 1 (car stack))
+ (or cpp-state-stack
+ (cpp-parse-error "Top level #else"))
+ (let ((entry (list (not (nth 0 (car cpp-state-stack)))
+ (nth 1 (car cpp-state-stack))
from to)))
(cpp-parse-close from to)
- (setq stack (cons entry stack))))
+ (setq cpp-state-stack (cons entry cpp-state-stack))))
((string-equal type "endif")
(cpp-parse-close from to))
(t
(cpp-parse-error "Parser error"))))))))
(message "Parsing...done"))
- (if stack
+ (if cpp-state-stack
(save-excursion
- (goto-char (nth 3 (car stack)))
+ (goto-char (nth 3 (car cpp-state-stack)))
(cpp-parse-error "Unclosed conditional"))))
(or arg
(null cpp-parse-symbols)
(cpp-parse-edit)))
(defun cpp-parse-open (branch expr begin end)
- "Push information about conditional-beginning onto stack."
+ "Push information about conditional-beginning onto `cpp-state-stack'."
;; Discard comments within this line.
(while (string-match "\\b[ \t]*/\\*.*\\*/[ \t]*\\b" expr)
(setq expr (concat (substring expr 0 (match-beginning 0))
(while (string-match "[ \t]+" expr)
(setq expr (concat (substring expr 0 (match-beginning 0))
(substring expr (match-end 0)))))
- (setq stack (cons (list branch expr begin end) stack))
+ (setq cpp-state-stack (cons (list branch expr begin end) cpp-state-stack))
(or (member expr cpp-parse-symbols)
(setq cpp-parse-symbols
(cons expr cpp-parse-symbols)))
(cpp-make-unknown-overlay begin end)))
(defun cpp-parse-close (from to)
- ;; Pop top of stack and create overlay.
- (let ((entry (assoc (nth 1 (car stack)) cpp-edit-list))
- (branch (nth 0 (car stack)))
- (begin (nth 2 (car stack)))
- (end (nth 3 (car stack))))
- (setq stack (cdr stack))
+ ;; Pop top of cpp-state-stack and create overlay.
+ (let ((entry (assoc (nth 1 (car cpp-state-stack)) cpp-edit-list))
+ (branch (nth 0 (car cpp-state-stack)))
+ (begin (nth 2 (car cpp-state-stack)))
+ (end (nth 3 (car cpp-state-stack))))
+ (setq cpp-state-stack (cdr cpp-state-stack))
(if entry
(let ((face (nth (if branch 1 2) entry))
(read-only (eq (not branch) (nth 3 entry)))
- (priority (length stack))
+ (priority (length cpp-state-stack))
(overlay (make-overlay end from)))
(cpp-make-known-overlay from to)
(setq cpp-overlay-list (cons overlay cpp-overlay-list))
;;; Overlays:
-(defvar cpp-overlay-list nil)
-;; List of cpp overlays active in the current buffer.
-(make-variable-buffer-local 'cpp-overlay-list)
-
(defun cpp-make-known-overlay (start end)
;; Create an overlay for a known cpp command from START to END.
(let ((overlay (make-overlay start end)))
;;; Edit Buffer:
-(defvar cpp-edit-list nil
- "Alist of cpp macros and information about how they should be displayed.
-Each entry is a list with the following elements:
-0. The name of the macro (a string).
-1. Face used for text that is `ifdef' the macro.
-2. Face used for text that is `ifndef' the macro.
-3. `t', `nil', or `both' depending on what text may be edited.")
-
(defvar cpp-edit-map nil)
;; Keymap for `cpp-edit-mode'.
(define-key cpp-edit-map "q" 'bury-buffer)
(define-key cpp-edit-map "Q" 'bury-buffer))
-(defvar cpp-edit-buffer nil)
-;; Real buffer whose cpp display information we are editing.
-(make-variable-buffer-local 'cpp-edit-buffer)
-
(defvar cpp-edit-symbols nil)
;; Symbols defined in the edit buffer.
(make-variable-buffer-local 'cpp-edit-symbols)
(setq cpp-unknown-face (cpp-choose-face "Unknown face" cpp-unknown-face))
(cpp-edit-reset))
-(defconst cpp-writable-list
- ;; Names used for the writable property.
- '(("writable" . t)
- ("read-only" . nil)))
-
(defun cpp-edit-toggle-known (arg)
"Toggle writable status for known conditionals.
With optional argument ARG, make them writable iff ARG is positive."
(defun cpp-choose-symbol ()
;; Choose a symbol if called from keyboard, otherwise use the one clicked on.
(if cpp-button-event
- data
+ cpp-callback-data
(completing-read "Symbol: " (mapcar 'list cpp-edit-symbols) nil t)))
-(defconst cpp-branch-list
- ;; Alist of branches.
- '(("false" . nil)
- ("true" . t)
- ("both" . both)))
-
(defun cpp-choose-branch ()
;; Choose a branch, either nil, t, or both.
(if cpp-button-event
cpp-face-all-list))))
default))
-(defconst cpp-face-type-list
- '(("light color background" . light)
- ("dark color background" . dark)
- ("monochrome" . mono)
- ("tty" . none))
- "Alist of strings and names of the defined face collections.")
-
(defun cpp-choose-default-face (type)
;; Choose default face list for screen of TYPE.
;; Type must be one of the types defined in `cpp-face-type-list'.
;;; Buttons:
-(defvar cpp-button-event nil)
-;; This will be t in the callback for `cpp-make-button'.
-
(defun cpp-make-button (name callback &optional data face padding)
;; Create a button at point.
;; NAME is the name of the button.
;; CALLBACK is the function to call when the button is pushed.
- ;; DATA will be available to CALLBACK as a free variable.
+ ;; DATA will be made available to CALLBACK
+ ;;in the free variable cpp-callback-data.
;; FACE means that NAME is the name of a face in `cpp-face-all-list'.
;; PADDING means NAME will be right justified at that length.
(let ((name (format "%s" name))
(interactive "@e")
(set-buffer (window-buffer (posn-window (event-start event))))
(let ((pos (posn-point (event-start event))))
- (let ((data (get-text-property pos 'cpp-data))
+ (let ((cpp-callback-data (get-text-property pos 'cpp-data))
(fun (get-text-property pos 'cpp-callback))
(cpp-button-event event))
(cond (fun
;;; Faces:
-(defvar cpp-face-light-name-list
- '("light gray" "light blue" "light cyan" "light yellow" "light pink"
- "pale green" "beige" "orange" "magenta" "violet" "medium purple"
- "turquoise")
- "Background colours useful with dark foreground colors.")
-
-(defvar cpp-face-dark-name-list
- '("dim gray" "blue" "cyan" "yellow" "red"
- "dark green" "brown" "dark orange" "dark khaki" "dark violet" "purple"
- "dark turquoise")
- "Background colours useful with light foreground colors.")
-
-(defvar cpp-face-light-list nil
- "Alist of names and faces to be used for light backgrounds.")
-
-(defvar cpp-face-dark-list nil
- "Alist of names and faces to be used for dark backgrounds.")
-
-(defvar cpp-face-mono-list
- '(("bold" . 'bold)
- ("bold-italic" . 'bold-italic)
- ("italic" . 'italic)
- ("underline" . 'underline))
- "Alist of names and faces to be used for monocrome screens.")
-
-(defvar cpp-face-none-list
- '(("default" . default)
- ("invisible" . invisible))
- "Alist of names and faces available even if you don't use a window system.")
-
-(defvar cpp-face-all-list
- (append cpp-face-light-list
- cpp-face-dark-list
- cpp-face-mono-list
- cpp-face-none-list)
- "All faces used for highligting text inside cpp conditionals.")
-
-(defvar cpp-face-default-list nil
- "List of faces you can choose from for cpp conditionals.")
-
(defun cpp-create-bg-face (color)
;; Create entry for face with background COLOR.
(let ((name (intern (concat "cpp " color))))
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