From e7657d6ba54ad5714657cff9be86ec416d342a4c Mon Sep 17 00:00:00 2001
From: Alan Pearce
Date: Sun, 28 Apr 2013 20:54:18 +0100
Subject: Migrate repository from mercurial without history

---
 emacs/elisp/xrdb-mode.el | 544 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 544 insertions(+)
 create mode 100644 emacs/elisp/xrdb-mode.el

(limited to 'emacs/elisp/xrdb-mode.el')

diff --git a/emacs/elisp/xrdb-mode.el b/emacs/elisp/xrdb-mode.el
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+;;; xrdb-mode.el --- mode for editing X resource database files
+
+;; Copyright (C) 1998,1999,2000 Free Software Foundation, Inc.
+
+;; Author:        1994-2003 Barry A. Warsaw
+;; Maintainer:    barry@python.org
+;; Created:       May 1994
+;; Keywords:      data languages
+
+(defconst xrdb-version "2.31"
+  "`xrdb-mode' version number.")
+
+;; 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; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+;;
+;; This file provides a major mode for editing X resource database
+;; files.  It includes font-lock definitions and commands for
+;; controlling indentation, re-indenting by subdivisions, and loading
+;; and merging into the the resource database.
+;;
+;; To use, put the following in your .emacs:
+;;
+;; (autoload 'xrdb-mode "xrdb-mode" "Mode for editing X resource files" t)
+;;
+;; You may also want something like:
+;;
+;; (setq auto-mode-alist
+;;       (append '(("\\.Xdefaults$"    . xrdb-mode)
+;;                 ("\\.Xenvironment$" . xrdb-mode)
+;;                 ("\\.Xresources$"   . xrdb-mode)
+;;                 ("*.\\.ad$"         . xrdb-mode)
+;;                 )
+;;               auto-mode-alist))
+
+;;; Credits:
+;;
+;; The database merge feature was inspired by Joel N. Weber II.
+;;
+;; The canonical Web site for xrdb-mode is
+;; <http://www.python.org/emacs/>
+
+;;; Code:
+(require 'custom)
+
+
+
+(defgroup xrdb nil
+  "Support for editing X resource database files"
+  :group 'languages)
+
+(defcustom xrdb-mode-hook nil
+  "*Hook to be run when `xrdb-mode' is entered."
+  :type 'hook
+  :group 'xrdb)
+
+(defcustom xrdb-subdivide-by 'paragraph
+  "*Default alignment subdivision when re-indenting a region or buffer.
+This variable controls how much of the buffer is searched to find a
+goal column on which to align.  Every non-comment line in the region
+defined by this variable is scanned for the first `:' character on the
+line, and this character's column is the line's goal column.  The
+rightmost line goal column in the region is taken as the region's goal
+column.
+
+This variable can take one of the following symbol values:
+
+ `buffer'    - All lines in the buffer are scanned.  This is the
+               slowest option.
+
+ `paragraph' - All lines in the paragraph are scanned.  Paragraphs
+               are delimited by blank lines, comment lines, and page
+               delimiters.
+
+ `page'      - All lines in the page are scanned.  Pages are delimited
+               with `page-delimiter', usually ^L (control-L).
+
+ `line'      - Only the previous non-comment line is scanned.  This is
+               the fastest method.
+
+This variable is used by the various indentation commands, and can be
+overridden in those commands by using \\[universal-argument]."
+  :type '(radio (const :tag "Do not subdivide buffer" buffer)
+                (const :tag "Subdivide by paragraphs" paragraph)
+                (const :tag "Subdivide by pages" page)
+                (const :tag "Each line is independent" line))
+  :group 'xrdb)
+
+(defcustom xrdb-compress-whitespace nil
+  "*Collapse all whitespace to a single space after insertion of `:'."
+  :type 'boolean
+  :group 'xrdb)
+
+(defcustom xrdb-program "xrdb"
+  "*Program to run to load or merge resources in the X resource database."
+  :type 'string
+  :group 'xrdb)
+
+(defcustom xrdb-program-args '("-merge")
+  "*List of string arguments to pass to `xrdb-program'."
+  :type '(repeat string)
+  :group 'xrdb)
+
+(defvar xrdb-master-file nil
+  "If non-nil, merge in the named file instead of the buffer's file.
+The intent is to allow you to set this variable in the file's local
+variable section, e.g.:
+
+    ! Local Variables:
+    ! xrdb-master-file: \"Xdefaults\"
+    ! End:
+
+so that typing \\[xrdb-database-merge-buffer-or-region] in that buffer
+merges the named master file instead of the buffer's file.  Note that
+if the file name has a relative path, the `default-directory' for the
+buffer is prepended to come up with a file name.
+
+You may also want to set `xrdb-program-args' in the local variables
+section as well.")
+(make-variable-buffer-local 'xrdb-master-file)
+
+
+;; Non-user customizable
+(defconst xrdb-comment-re "^[ \t]*[!]"
+  "Regular expression describing the beginning of a comment line.")
+
+
+
+;; utilities
+(defun xrdb-point (position)
+  ;; Returns the value of point at certain commonly referenced POSITIONs.
+  ;; POSITION can be one of the following symbols:
+  ;;
+  ;; bol  -- beginning of line
+  ;; eol  -- end of line
+  ;; bod  -- beginning of defun
+  ;; boi  -- back to indentation
+  ;; ionl -- indentation of next line
+  ;; iopl -- indentation of previous line
+  ;; bonl -- beginning of next line
+  ;; bopl -- beginning of previous line
+  ;; bop  -- beginning of paragraph
+  ;; eop  -- end of paragraph
+  ;; bopg -- beginning of page
+  ;; eopg -- end of page
+  ;;
+  ;; This function does not modify point or mark.
+  (let ((here (point)))
+    (cond
+     ((eq position 'bod)  (beginning-of-defun))
+     ((eq position 'bol)  (beginning-of-line))
+     ((eq position 'eol)  (end-of-line))
+     ((eq position 'boi)  (back-to-indentation))
+     ((eq position 'bonl) (forward-line 1))
+     ((eq position 'bopl) (forward-line -1))
+     ((eq position 'bop)  (forward-paragraph -1))
+     ((eq position 'eop)  (forward-paragraph 1))
+     ((eq position 'bopg)  (forward-page -1))
+     ((eq position 'eopg)  (forward-page 1))
+     (t
+      (error "unknown buffer position requested: %s" position)))
+    (prog1
+        (point)
+      (goto-char here))
+    ))
+
+(defmacro xrdb-safe (&rest body)
+  ;; safely execute BODY, return nil if an error occurred
+  `( (condition-case nil
+         (progn (,@ body))
+       (error nil))))
+
+(defsubst xrdb-skip-to-separator ()
+  ;; skip forward from the beginning of the line to the separator
+  ;; character as given by xrdb-separator-char. Returns t if the
+  ;; char was found, otherwise, nil.
+  (beginning-of-line)
+  (skip-chars-forward "^:" (xrdb-point 'eol))
+  (and (eq (char-after) ?:)
+       (current-column)))
+
+(defsubst xrdb-in-comment-p (&optional lim)
+  (let* ((lim (or lim (xrdb-point 'bod)))
+         (state (parse-partial-sexp lim (point))))
+    (nth 4 state)))
+
+(defsubst xrdb-boi-col ()
+  (let ((here (point)))
+    (goto-char (xrdb-point 'boi))
+    (prog1
+        (current-column)
+      (goto-char here))))
+
+(defvar xrdb-prompt-history nil)
+
+(defun xrdb-prompt-for-subdivision ()
+  (let ((options '(("buffer" . buffer)
+                   ("paragraphs" . paragraph)
+                   ("pages" . page)
+                   ("lines" . line)))
+        (completion-ignore-case t))
+    (cdr (assoc
+          (completing-read "Subdivide alignment by? " options nil t
+                           (cons (format "%s" xrdb-subdivide-by) 0)
+                           'xrdb-prompt-history)
+          options))))
+
+
+;; commands
+(defun xrdb-electric-separator (arg)
+  "Insert a colon, and possibly indent line.
+Numeric argument inserts that many separators.  If the numeric
+argument is not given, or is 1, and the separator is not inserted in a
+comment, then the line is indented according to `xrdb-subdivide-by'."
+  (interactive "P")
+  (self-insert-command (prefix-numeric-value arg))
+  ;; only do electric behavior if arg is not given
+  (or arg
+      (xrdb-in-comment-p)
+      (xrdb-indent-line))
+  ;; compress whitespace
+  (and xrdb-compress-whitespace
+       (just-one-space)))
+
+(defun xrdb-electric-bang (arg)
+  "Insert an exclamation point to start a comment.
+Numeric argument inserts that many exclamation characters.  If the
+numeric argument is not given, or is 1, and the bang character is the
+first character on a line, the line is indented to column zero."
+  (interactive "P")
+  (let ((how-many (prefix-numeric-value arg)))
+    (self-insert-command how-many)
+    (save-excursion
+      (if (and (= how-many 1)
+               (xrdb-in-comment-p)
+               (memq (char-before (xrdb-point 'boi)) '(?\n nil)))
+          (indent-line-to 0)))
+    ))
+
+
+(defun xrdb-indent-line (&optional arg)
+  "Align the current line according to `xrdb-subdivide-by'.
+With optional \\[universal-argument], prompt for subdivision."
+  (interactive "P")
+  (xrdb-align-to-column
+   (xrdb-guess-goal-column (if arg
+                               (xrdb-prompt-for-subdivision)
+                             xrdb-subdivide-by))
+   (xrdb-point 'bol)
+   (xrdb-point 'bonl)))
+
+(defun xrdb-indent-region (start end &optional arg)
+  "Indent all lines in the region according to `xrdb-subdivide-by'.
+With optional \\[universal-argument], prompt for subdivision."
+  (interactive "r\nP")
+  (xrdb-align-to-column
+   (xrdb-guess-goal-column (if arg
+                               (xrdb-prompt-for-subdivision)
+                             xrdb-subdivide-by))
+   start end))
+
+(defun xrdb-indent-page (&optional arg)
+  "Indent all lines in the page according to `xrdb-subdivide-by'.
+With optional \\[universal-argument], prompt for subdivision."
+  (interactive "P")
+  (xrdb-align-to-column
+   (xrdb-guess-goal-column (if arg
+                               (xrdb-prompt-for-subdivision)
+                             xrdb-subdivide-by))
+   (xrdb-point 'bopg)
+   (xrdb-point 'eopg)))
+
+(defun xrdb-indent-paragraph (&optional arg)
+  "Indent all lines in the paragraph according to `xrdb-subdivide-by'.
+With optional \\[universal-argument], prompt for subdivision."
+  (interactive "P")
+  (xrdb-align-to-column
+   (xrdb-guess-goal-column (if arg
+                               (xrdb-prompt-for-subdivision)
+                             xrdb-subdivide-by))
+   (xrdb-point 'bop)
+   (xrdb-point 'eop)))
+
+(defun xrdb-indent-buffer (&optional arg)
+  "Indent all lines in the buffer according to `xrdb-subdivide-by'.
+With optional \\[universal-argument], prompt for subdivision."
+  (interactive "P")
+  (let ((subdivide-by (if arg
+                          (xrdb-prompt-for-subdivision)
+                        xrdb-subdivide-by)))
+    (save-excursion
+      (beginning-of-buffer)
+      (if (eq subdivide-by 'buffer)
+          (xrdb-align-to-column (xrdb-guess-goal-column 'buffer)
+                                (point-min) (point-max))
+        (let (mvfwdfunc indentfunc)
+          (cond
+           ((eq subdivide-by 'paragraph)
+            (setq mvfwdfunc 'forward-paragraph
+                  indentfunc 'xrdb-indent-paragraph))
+           ((eq subdivide-by 'page)
+            (setq mvfwdfunc 'forward-page
+                  indentfunc 'xrdb-indent-page))
+           ((eq subdivide-by 'line)
+            (setq mvfwdfunc 'forward-line
+                  indentfunc 'xrdb-indent-page))
+           (t (error "Illegal alignment subdivision: %s" subdivide-by))
+           )
+          (while (< (point) (point-max))
+            (funcall indentfunc)
+            (funcall mvfwdfunc 1))
+          )))))
+
+
+;; internal alignment functions
+(defun xrdb-align-to-column (goalcol &optional start end)
+  (let ((start (or start (xrdb-point 'bol)))
+        (end (or end (xrdb-point 'bonl))))
+    (save-excursion
+      (save-restriction
+        (narrow-to-region start end)
+        (beginning-of-buffer)
+        (while (< (point) (point-max))
+          (if (and (not (looking-at xrdb-comment-re))
+                   (xrdb-skip-to-separator))
+              (indent-line-to (max 0 (+ goalcol
+                                        (- (current-column))
+                                        (xrdb-boi-col))
+                                   )))
+          (forward-line 1))
+        ))))
+
+(defun xrdb-guess-goal-column (subdivide-by)
+  ;; Returns the goal column of the current line based on SUBDIVIDE-BY,
+  ;; which can be any value allowed by `xrdb-subdivide-by'.
+  (let ((here (point))
+        (goalcol 0))
+    (save-restriction
+      (cond
+       ((eq subdivide-by 'line)
+        (while (and (zerop (forward-line -1))
+                    (or (looking-at xrdb-comment-re)
+                        (not (xrdb-skip-to-separator)))))
+        ;; maybe we didn't find one
+        (if (not (xrdb-skip-to-separator))
+            (goto-char here))
+        (narrow-to-region (xrdb-point 'bol) (xrdb-point 'bonl)))
+       ((eq subdivide-by 'page)
+        (narrow-to-page))
+       ((eq subdivide-by 'paragraph)
+        (narrow-to-region (xrdb-point 'bop) (xrdb-point 'eop)))
+       ((eq subdivide-by 'buffer))
+       (t (error "Illegal alignment subdivision: %s" subdivide-by)))
+      (goto-char (point-min))
+      (while (< (point) (point-max))
+        (if (and (not (looking-at xrdb-comment-re))
+                 (xrdb-skip-to-separator))
+            (setq goalcol (max goalcol (- (current-column) (xrdb-boi-col)))))
+        (forward-line 1)))
+    (goto-char here)
+    goalcol))
+
+
+
+;; major-mode stuff
+(defvar xrdb-mode-abbrev-table nil
+  "Abbreviation table used in `xrdb-mode' buffers.")
+(define-abbrev-table 'xrdb-mode-abbrev-table ())
+
+
+(defvar xrdb-mode-syntax-table nil
+  "Syntax table used in `xrdb-mode' buffers.")
+(if xrdb-mode-syntax-table
+    nil
+  (setq xrdb-mode-syntax-table (make-syntax-table))
+  (modify-syntax-entry ?!  "<"    xrdb-mode-syntax-table)
+  (modify-syntax-entry ?\\ "\\"   xrdb-mode-syntax-table)
+  (modify-syntax-entry ?\n ">"    xrdb-mode-syntax-table)
+  (modify-syntax-entry ?/  ". 14" xrdb-mode-syntax-table)
+  (modify-syntax-entry ?*  "_ 23" xrdb-mode-syntax-table)
+  (modify-syntax-entry ?.  "_"    xrdb-mode-syntax-table)
+  (modify-syntax-entry ?#  "_"    xrdb-mode-syntax-table)
+  (modify-syntax-entry ??  "_"    xrdb-mode-syntax-table)
+  (modify-syntax-entry ?<  "("    xrdb-mode-syntax-table)
+  (modify-syntax-entry ?>  ")"    xrdb-mode-syntax-table)
+  )
+
+
+(defvar xrdb-mode-map ()
+  "Keymap used in `xrdb-mode' buffers.")
+(if xrdb-mode-map
+    ()
+  (setq xrdb-mode-map (make-sparse-keymap))
+  ;; make the separator key electric
+  (define-key xrdb-mode-map ":"        'xrdb-electric-separator)
+  (define-key xrdb-mode-map "!"        'xrdb-electric-bang)
+  (define-key xrdb-mode-map "\t"       'xrdb-indent-line)
+  (define-key xrdb-mode-map "\C-c\C-a" 'xrdb-indent-buffer)
+  (define-key xrdb-mode-map "\C-c\C-b" 'xrdb-submit-bug-report)
+  (define-key xrdb-mode-map "\C-c\C-c" 'xrdb-database-merge-buffer-or-region)
+  (define-key xrdb-mode-map "\C-c\C-p" 'xrdb-indent-paragraph)
+  (define-key xrdb-mode-map "\C-c\["   'xrdb-indent-page)
+  (define-key xrdb-mode-map "\C-c\C-r" 'xrdb-indent-region)
+  )
+
+;;;###autoload
+(defun xrdb-mode ()
+  "Major mode for editing xrdb config files"
+  (interactive)
+  (kill-all-local-variables)
+  (set-syntax-table xrdb-mode-syntax-table)
+  (setq major-mode 'xrdb-mode
+        mode-name "xrdb"
+        local-abbrev-table xrdb-mode-abbrev-table)
+  (use-local-map xrdb-mode-map)
+  (setq font-lock-defaults '(xrdb-font-lock-keywords))
+  ;; local variables
+  (make-local-variable 'parse-sexp-ignore-comments)
+  (make-local-variable 'comment-start-skip)
+  (make-local-variable 'comment-start)
+  (make-local-variable 'comment-end)
+  (make-local-variable 'paragraph-start)
+  (make-local-variable 'paragraph-separate)
+  (make-local-variable 'paragraph-ignore-fill-prefix)
+  (make-local-variable 'indent-region-function)
+  ;; now set their values
+  (setq parse-sexp-ignore-comments t
+        comment-start-skip "![ \t]*"
+        comment-start "! "
+        comment-end "")
+  (setq indent-region-function 'xrdb-indent-region
+        paragraph-ignore-fill-prefix t
+        paragraph-start (concat "^[ \t]*$\\|^[ \t]*[!]\\|" page-delimiter)
+        paragraph-separate paragraph-start)
+  (run-hooks 'xrdb-mode-hook))
+
+
+
+;; faces and font-locking
+(defvar xrdb-option-name-face 'xrdb-option-name-face
+  "Face for option name on a line in an X resource db file")
+
+(defvar xrdb-option-value-face 'xrdb-option-value-face
+  "Face for option value on a line in an X resource db file")
+
+(make-face 'xrdb-option-name-face)
+(make-face 'xrdb-option-value-face)
+
+(defun xrdb-font-lock-mode-hook ()
+  (or (face-differs-from-default-p 'xrdb-option-name-face)
+      (copy-face 'font-lock-keyword-face 'xrdb-option-name-face))
+  (or (face-differs-from-default-p 'xrdb-option-value-face)
+      (copy-face 'font-lock-string-face 'xrdb-option-value-face))
+  (remove-hook 'font-lock-mode-hook 'xrdb-font-lock-mode-hook))
+(add-hook 'font-lock-mode-hook 'xrdb-font-lock-mode-hook)
+
+(defvar xrdb-font-lock-keywords
+  (list '("^[ \t]*\\([^\n:]*:\\)[ \t]*\\(.*\\)$"
+          (1 xrdb-option-name-face)
+          (2 xrdb-option-value-face)))
+  "Additional expressions to highlight in X resource db mode.")
+(put 'xrdb-mode 'font-lock-defaults '(xrdb-font-lock-keywords))
+
+
+
+;; merging and manipulating the X resource database
+(defun xrdb-database-merge-buffer-or-region (start end)
+  "Merge the current buffer's resources into the X resource database.
+
+`xrdb-program' is the program to actually call, with the arguments
+specified in `xrdb-program-args'.  This latter can be set to do either
+a merge or a load, etc.  Also, if the file local variable
+`xrdb-master-file' is non-nil, then it is merged instead of the
+buffer's file.
+
+If the current region is active, it is merged instead of the buffer,
+and this overrides any use of `xrdb-master-file'."
+  (interactive
+   ;; the idea here is that if the region is inactive, start and end
+   ;; will be nil, if not passed in programmatically
+   (list (xrdb-safe (and (mark) (region-beginning)))
+         (xrdb-safe (and (mark) (region-end)))))
+  (message "Merging with args: %s..." xrdb-program-args)
+  (let ((outbuf (get-buffer-create "*Shell Command Output*")))
+    ;; I prefer the XEmacs way of doing this, but this is the easiest
+    ;; way to work in both XEmacs and Emacs.
+    (with-current-buffer outbuf (erase-buffer))
+    (cond
+     ((and start end)
+      (apply 'call-process-region start end xrdb-program nil outbuf t
+             xrdb-program-args))
+     (xrdb-master-file
+      (apply 'call-process xrdb-program xrdb-master-file outbuf t
+             xrdb-program-args))
+     (t
+      (apply 'call-process-region (point-min) (point-max) xrdb-program
+             nil outbuf t xrdb-program-args)))
+    (if (not (zerop (with-current-buffer outbuf (buffer-size))))
+        (pop-to-buffer outbuf)))
+  (message "Merging... done"))
+
+
+
+;; submitting bug reports
+
+(defconst xrdb-mode-help-address "tools-help@python.org"
+  "Address for xrdb-mode bug reports.")
+
+(defun xrdb-submit-bug-report ()
+  "Submit via mail a bug report on xrdb-mode."
+  (interactive)
+  ;; load in reporter
+  (require 'reporter)
+  (let ((reporter-prompt-for-summary-p t)
+        (varlist '(xrdb-subdivide-by
+                   xrdb-mode-hook
+                   xrdb-compress-whitespace
+                   )))
+    (and (if (y-or-n-p "Do you want to submit a report on xrdb-mode? ")
+             t
+           (message "")
+           nil)
+         (require 'reporter)
+         (reporter-submit-bug-report
+          xrdb-mode-help-address
+          (format "xrdb-mode %s" xrdb-version)
+          varlist nil nil "Dear Barry,")
+         )))
+
+
+(provide 'xrdb-mode)
+;;; xrdb-mode.el ends here
-- 
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