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- ;;; page-ext.el --- page handling commands
-
- ;;; Copyright (C) 1990 Free Software Foundation
-
- ;; Author: Robert J. Chassell <bob@gnu.ai.mit.edu>
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- ;;; Commentary:
-
- ;;; You may use these commands to handle an address list or other
- ;;; small data base.
-
- ;;; Change Log:
-
- ;;; Change Log ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;;
- ;;; Version 0.043
- ;;; 24 May 1990 - When the cursor is at the end of the pages directory
- ;;; buffer (which is empty), a `C-c C-c' (pages-directory-goto)
- ;;; command now takes you to the end of the buffer.
- ;;;
- ;;; Version 0.042
- ;;; 16 May 1990 - Since people often handle address and other files
- ;;; differently, variable `pages-directory-for-addresses-narrowing-p'
- ;;; now specifies whether `pages-directory-goto' should narrow
- ;;; addresses buffer to entry to which it goes.
- ;;; `pages-directory-buffer-narrowing-p' continues to control
- ;;; narrowing of pages buffer.
- ;;;
- ;;; `add-new-page' documentation string now explains
- ;;; that the value of the inserted page-delimiter is a `^L'.
- ;;;
- ;;; `pages-directory-previous-regexp' definition reworded.
- ;;;
- ;;; Removed unneeded defvar for `pages-directory-buffer'.
- ;;;
- ;;; Version 0.041
- ;;; 14 May 1990 - `pages-last-search' bound to nil initially.
- ;;; Remove unnecessary lines from `search-pages' definition.
- ;;;
- ;;; Version 0.04
- ;;; 18 Mar 1990 - `pages-directory' creates a directory for only the
- ;;; accessible portion of the buffer; it does not automatically widen
- ;;; the buffer.
- ;;;
- ;;; However, `pages-directory-for-addresses' does widen the addresses'
- ;;; buffer before constructing the addresses' directory.
- ;;;
- ;;; Version 0.032
- ;;; 20 Feb 1990 - `pages-directory-for-addresses' no longer copies
- ;;; first line of addresses directory to kill-ring
- ;;;
- ;;; Remove `(kill-all-local-variables)' line from
- ;;; `pages-directory-address-mode' so Emacs will not be told to forget
- ;;; the name of the file containing the addresses!
- ;;;
- ;;; Version 0.031
- ;;; 15 Feb 1990 - `pages-directory-goto' no longer erroneously selects
- ;;; the entry on the following line when the cursor is at the end of
- ;;; the line, but selects the entry on which the cursor rests.
- ;;;
- ;;; `pages-directory-address-mode' now sets local variables and enables
- ;;; `describe-mode' to describe Addresses Directory mode.
- ;;;
- ;;; `pages-directory-for-addresses' now sets the buffer-modified flag
- ;;; for the Addresses Directory to nil.
- ;;;
- ;;; The documentation string for both `pages-directory-mode' and
- ;;; `pages-directory-address-mode' now provide a lookup for the
- ;;; `pages-directory-goto' keybinding.
- ;;;
- ;;; Version 0.03
- ;;; 10 Feb 1990 - Incorporated a specialized extension of the
- ;;; `pages-directory' command called `pages-directory-for-addresses'
- ;;; and bound it to ctl-x-ctl-p-map "d" for integration with other
- ;;; page functions. This function finds a file, creates a directory
- ;;; for it using the `pages-directory' command, and displays the
- ;;; directory. It is primarily for lists of addresses and the like.
- ;;;
- ;;; The difference between this and the `pages-directory' command is
- ;;; that the `pages-directory-for-addresses' command presumes a
- ;;; default addresses file (although you may optionally specify a file
- ;;; name) and it switches you to the directory for the file, but the
- ;;; `pages-directory' command creates a directory for the current
- ;;; buffer, and pops to the directory in another window.
- ;;;
- ;;; `pages-directory' now places the cursor over the header line of
- ;;; the page in which point was located in the pages buffer.
- ;;;
- ;;; New `set-page-delimiter' command sets the buffer local value of
- ;;; the page-delimiter variable. With prefix arg, resets function to
- ;;; original value. (Quicker to use than `edit-options'.)
- ;;;
- ;;; Version 0.02
- ;;; 9 Feb 1990 - `pages-directory' now displays the
- ;;; first line that contains a non-blank character that follows the
- ;;; `page-delimiter'; this may be the rest of the line that contains
- ;;; the `page-delimiter' or a line following. (In most instances, the
- ;;; line containing a non-blank character is a line of text.)
- ;;; Modification includes changes to `pages-copy-header-and-position'.
- ;;;
- ;;; Each directory created by `pages-directory' now possesses a name
- ;;; derived on the name of the pages buffer. Consequently, you may
- ;;; create several different directories, one for each pages buffer.
- ;;;
- ;;; `sort-pages-in-region' no longers requires the text to start on
- ;;; the line immediately following the line containing the
- ;;; page-delimiter.
- ;;;
- ;;; `pages-directory-goto' no longer narrows to the page
- ;;; automatically. Instead, if you wish it to narrow to the page, set
- ;;; variable pages-directory-buffer-narrowing-p to a non-nil value.
- ;;; Default is nil; this is an experiment to see whether it is useful
- ;;; to see the surrounding context.
- ;;;
- ;;; Version 0.011
- ;;; 2 Feb 1990 - `add-new-page': removed extraneous space.
- ;;;
- ;;; Version 0.01
- ;;; 28 Jan 1990 - Initial definitions.
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- ;;; Code:
-
- ;;;; Summary
-
- ; The current page commands are:
-
- ; forward-page C-x ]
- ; backward-page C-x [
- ; narrow-to-page C-x p
- ; count-lines-page C-x l
- ; mark-page C-x C-p (change this to C-x C-p C-m)
- ; sort-pages not bound
- ; what-page not bound
-
- ; The new page handling commands all use `C-x C-p' as a prefix. This
- ; means that the key binding for `mark-page' must be changed.
- ; Otherwise, no other changes are made to the current commands or
- ; their bindings.
-
- ; New page handling commands:
-
- ; next-page C-x C-p C-n
- ; previous-page C-x C-p C-p
- ; search-pages C-x C-p C-s
- ; add-new-page C-x C-p C-a
- ; sort-pages-buffer C-x C-p s
- ; set-page-delimiter C-x C-p C-l
- ; pages-directory C-x C-p C-d
- ; pages-directory-for-addresses C-x C-p d
- ; goto-page C-c C-c
-
-
- ;;;; Using the page commands
- ;
- ; The page commands are helpful in several different contexts. For
- ; example, programmers often divide source files into sections using the
- ; `page-delimiter'; you can use the `pages-directory' command to list
- ; the sections.
-
- ; You may change the buffer local value of the `page-delimiter' with
- ; the `set-page-delimiter' command. This command is bound to `C-x C-p
- ; C-l' The command prompts you for a new value for the page-delimiter.
- ; Called with a prefix-arg, the command resets the value of the
- ; page-delimiter to its original value.
-
-
- ;;;; Handling an address list or small data base
-
- ; You may use the page commands to handle an address list or other
- ; small data base. Put each address or entry on its own page. The
- ; first line of text in each page is a `header line' and is listed by
- ; the `pages-directory' or `pages-directory-for-addresses' command.
-
- ; Specifically:
- ;
- ; 1. Begin each entry with a `page-delimiter' (which is, by default,
- ; `^L' at the beginning of the line).
- ;
- ; 2. The first line of text in each entry is the `heading line'; it
- ; will appear in the pages-directory-buffer which is constructed
- ; using the `C-x C-p C-d' (pages-directory) command or the `C-x
- ; C-p d' (pages-directory-for-addresses) command.
- ;
- ; The heading line may be on the same line as the page-delimiter
- ; or it may follow after. It is the first non-blank line on the
- ; page. Conventionally, the heading line is placed on the line
- ; immediately following the line containing page-delimiter.
- ;
- ; 3. Follow the heading line with the body of the entry. The body
- ; extends up to the next `page-delimiter'. The body may be of any
- ; length. It is conventional to place a blank line after the last
- ; line of the body.
-
- ; For example, a file might look like this:
- ;
- ; FSF
- ; Free Software Foundation
- ; 675 Massachusetts Avenue
- ; Cambridge, MA 02139 USA
- ; (617) 876-3296
- ; gnu@prep.ai.mit.edu
- ;
- ;
- ; House Subcommittee on Intellectual Property,
- ; U.S. House of Representatives,
- ; Washington, DC 20515
- ;
- ; Congressional committee concerned with permitting or preventing
- ; monopolistic restrictions on the use of software technology
- ;
- ;
- ; George Lakoff
- ; ``Women, Fire, and Dangerous Things:
- ; What Categories Reveal about the Mind''
- ; 1987, Univ. of Chicago Press
- ;
- ; About philosophy, Whorfian effects, and linguistics.
- ;
- ;
- ; OBI (On line text collection.)
- ; Open Book Initiative
- ; c/o Software Tool & Die
- ; 1330 Beacon St, Brookline, MA 02146 USA
- ; (617) 739-0202
- ; obi@world.std.com
-
- ; In this example, the heading lines are:
- ;
- ; FSF
- ; House Subcommittee on Intellectual Property
- ; George Lakoff
- ; OBI (On line text collection.)
-
- ; The `C-x C-p s' (sort-pages-buffer) command sorts the entries in the
- ; buffer alphabetically.
-
- ; You may use any of the page commands, including the `next-page',
- ; `previous-page', `add-new-page', `mark-page', and `search-pages'
- ; commands.
-
- ; You may use either the `C-x C-p d' (pages-directory-for-addresses)
- ; or the `C-x C-p C-d' (pages-directory) command to construct and
- ; dislay a directory of all the heading lines.
-
- ; In the directory, you may position the cursor over a heading line
- ; and type `C-c C-c' to go to the entry to which it refers in the
- ; pages buffer.
-
- ; When used in conjunction with the `pages-directory-for-addresses'
- ; command, the `C-c C-c' (pages-directory-goto) command narrows to the
- ; entry to which it goes. But, when used in conjunction with the
- ; `pages-directory' command, the `C-c C-c' (pages-directory-goto)
- ; command does not narrow to the entry, but widens the buffer so you
- ; can see the context surrounding the entry.
-
- ; If you wish, you may create several different directories,
- ; one for each different buffer.
-
- ;; `pages-directory-for-addresses' in detail
-
- ; The `pages-directory-for-addresses' assumes a default addresses
- ; file. You do not need to specify the addresses file but merely type
- ; `C-x C-p d' from any buffer. The command finds the file, constructs
- ; a directory for it, and switches you to the directory. If you call
- ; the command with a prefix arg, `C-u C-x C-p d', it prompts you for a
- ; file name.
-
- ;; `pages-directory' in detail
-
- ; Call the `pages-directory' from the buffer for which you want a
- ; directory created; it creates a directory for the buffer and pops
- ; you to the directory.
-
- ; The `pages-directory' command has several options:
-
- ; Called with a prefix arg, `C-u C-x C-p C-d', the `pages-directory'
- ; prompts you for a regular expression and only lists only those
- ; header lines that are part of pages that contain matches to the
- ; regexp. In the example above, `C-u C-x C-p C-d 617 RET' would
- ; match the telephone area code of the first and fourth entries, so
- ; only the header lines of those two entries would appear in the
- ; pages-directory-buffer.
- ;
- ; Called with a numeric argument, the `pages-directory' command
- ; lists the number of lines in each page. This is helpful when you
- ; are printing hardcopy.
-
- ; Called with a negative numeric argument, the `pages-directory'
- ; command lists the lengths of pages whose contents match a regexp.
-
-
- ;;;; Key bindings for page handling functions
-
- (global-unset-key "\C-x\C-p")
-
- (defvar ctl-x-ctl-p-map (make-sparse-keymap)
- "Keymap for subcommands of C-x C-p, which are for page handling.")
-
- (define-key ctl-x-map "\C-p" 'ctl-x-ctl-p-prefix)
- (fset 'ctl-x-ctl-p-prefix ctl-x-ctl-p-map)
-
- (define-key ctl-x-ctl-p-map "\C-n" 'next-page)
- (define-key ctl-x-ctl-p-map "\C-p" 'previous-page)
- (define-key ctl-x-ctl-p-map "\C-a" 'add-new-page)
- (define-key ctl-x-ctl-p-map "\C-m" 'mark-page)
- (define-key ctl-x-ctl-p-map "\C-s" 'search-pages)
- (define-key ctl-x-ctl-p-map "s" 'sort-pages-buffer)
- (define-key ctl-x-ctl-p-map "\C-l" 'set-page-delimiter)
- (define-key ctl-x-ctl-p-map "\C-d" 'pages-directory)
- (define-key ctl-x-ctl-p-map "d" 'pages-directory-for-addresses)
-
-
- ;;;; Page movement function definitions
-
- (defun next-page (&optional count)
- "Move to the next page bounded by the `page-delimiter' variable.
- With arg (prefix if interactive), move that many pages."
- (interactive "p")
- (or count (setq count 1))
- (widen)
- ;; Cannot use forward-page because of problems at page boundaries.
- (while (and (> count 0) (not (eobp)))
- (if (re-search-forward page-delimiter nil t)
- nil
- (goto-char (point-max)))
- (setq count (1- count)))
- ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
- ;; The first page boundary we reach is the top of the current page,
- ;; which doesn't count.
- (while (and (< count 1) (not (bobp)))
- (if (re-search-backward page-delimiter nil t)
- (goto-char (match-beginning 0))
- (goto-char (point-min)))
- (setq count (1+ count)))
- (narrow-to-page)
- (goto-char (point-min))
- (recenter 0))
-
- (defun previous-page (&optional count)
- "Move to the previous page bounded by the `page-delimiter' variable.
- With arg (prefix if interactive), move that many pages."
- (interactive "p")
- (or count (setq count 1))
- (next-page (- count)))
-
-
- ;;;; Adding and searching pages
-
- (defun add-new-page (header-line)
- "Insert new page at point; prompt for header line.
- Page begins with a `^L' as the page-delimiter.
- Point is left in the body of page."
- (interactive "sHeader line: ")
- (widen)
- (insert (format "\n\n%s\n\n" header-line))
- ;; don't renarrow; stay unnarrowed to see context
- (forward-line -1))
-
- (defvar pages-last-search nil
- "Value of last regexp searched for. Initially, nil.")
-
- (defun search-pages (regexp)
- "Search for REGEXP, starting from point, and narrow to page it is in."
- (interactive (list
- (read-string
- (format "Search for `%s' (end with RET): "
- (or pages-last-search "regexp")))))
- (if (equal regexp "")
- (setq regexp pages-last-search)
- (setq pages-last-search regexp))
- (widen)
- (re-search-forward regexp)
- (narrow-to-page))
-
-
- ;;;; Sorting pages
-
- (autoload 'sort-subr "sort" "Primary function for sorting." t nil)
-
- (defun sort-pages-in-region (reverse beg end)
- "Sort pages in region alphabetically. Prefix arg means reverse order.
-
- Called from a program, there are three arguments:
- REVERSE (non-nil means reverse order), BEG and END (region to sort)."
-
- ;;; This sort function handles ends of pages differently than
- ;;; `sort-pages' and works better with lists of addresses and similar
- ;;; files.
-
- (interactive "P\nr")
- (save-restriction
- (narrow-to-region beg end)
- (goto-char (point-min))
- ;;; `sort-subr' takes three arguments
- (sort-subr reverse
-
- ;; NEXTRECFUN is called with point at the end of the
- ;; previous record. It moves point to the start of the
- ;; next record.
- (function (lambda ()
- (re-search-forward page-delimiter nil t)
- (skip-chars-forward " \t\n")
- ))
-
- ;; ENDRECFUN is is called with point within the record.
- ;; It should move point to the end of the record.
- (function (lambda ()
- (if (re-search-forward
- page-delimiter
- nil
- t)
- (goto-char (match-beginning 0))
- (goto-char (point-max))))))))
-
- (defun sort-pages-buffer (&optional reverse)
- "Sort pages alphabetically in buffer. Prefix arg means reverse order.
- \(Non-nil arg if not interactive.\)"
-
- (interactive "P")
- (or reverse (setq reverse nil))
- (widen)
- (let ((beginning (point-min))
- (end (point-max)))
- (sort-pages-in-region reverse beginning end)))
-
-
- ;;;; Pages directory ancillary definitions
-
- (defvar pages-directory-buffer-narrowing-p nil
- "*If non-nil, `pages-directory-goto' narrows pages buffer to entry.")
-
- (defvar pages-directory-previous-regexp nil
- "Value of previous regexp used by `pages-directory'.
- \(This regular expression may be used to select only those pages that
- contain matches to the regexp.\)")
-
- (defvar pages-buffer nil
- "The buffer for which the pages-directory function creates the directory.")
-
- (defvar pages-directory-prefix "*Directory for:"
- "Prefix of name of temporary buffer for pages-directory.")
-
- (defvar pages-pos-list nil
- "List containing the positions of the pages in the pages-buffer.")
-
- (defvar pages-directory-map nil
- "Keymap for the pages-directory-buffer.")
-
- (if pages-directory-map
- ()
- (setq pages-directory-map (make-sparse-keymap))
- (define-key pages-directory-map "\C-c\C-c"
- 'pages-directory-goto))
-
- (defun set-page-delimiter (regexp reset-p)
- "Set buffer local value of page-delimiter to REGEXP.
- Called interactively with a prefix argument, reset `page-delimiter' to
- its original value.
-
- In a program, non-nil second arg causes first arg to be ignored and
- resets the page-delimiter to the original value."
-
- (interactive
- (if current-prefix-arg
- (list original-page-delimiter nil)
- (list (read-string "Set page-delimiter to regexp: " page-delimiter)
- nil)))
- (make-local-variable 'original-page-delimiter)
- (make-local-variable 'page-delimiter)
- (setq original-page-delimiter
- (or original-page-delimiter page-delimiter))
- (if (not reset-p)
- (setq page-delimiter regexp)
- (setq page-delimiter original-page-delimiter))
- (if (interactive-p)
- (message "The value of `page-delimiter' is now: %s" page-delimiter)))
-
-
- ;;;; Pages directory main definitions
-
- (defun pages-directory
- (pages-list-all-headers-p count-lines-p &optional regexp)
- "Display a directory of the page headers in a temporary buffer.
- A header is the first non-blank line after the page-delimiter.
- \\[pages-directory-mode]
- You may move point to one of the lines in the temporary buffer,
- then use \\<pages-directory-goto> to go to the same line in the pages buffer.
-
- In interactive use:
-
- 1. With no prefix arg, display all headers.
-
- 2. With prefix arg, display the headers of only those pages that
- contain matches to a regular expression for which you are
- prompted.
-
- 3. With numeric prefix arg, for every page, print the number of
- lines within each page.
-
- 4. With negative numeric prefix arg, for only those pages that
- match a regular expression, print the number of lines within
- each page.
-
- When called from a program, non-nil first arg means list all headers;
- non-nil second arg means print numbers of lines in each page; if first
- arg is nil, optional third arg is regular expression.
-
- If the buffer is narrowed, the `pages-directory' command creates a
- directory for only the accessible portion of the buffer."
-
- (interactive
- (cond ((not current-prefix-arg)
- (list t nil nil))
- ((listp current-prefix-arg)
- (list nil
- nil
- (read-string
- (format "Select according to `%s' (end with RET): "
- (or pages-directory-previous-regexp "regexp")))))
- ((> (prefix-numeric-value current-prefix-arg) 0)
- (list t t nil))
- ((< (prefix-numeric-value current-prefix-arg) 0)
- (list nil
- t
- (read-string
- (format "Select according to `%s' (end with RET): "
- (or pages-directory-previous-regexp "regexp")))))))
-
- (if (equal regexp "")
- (setq regexp pages-directory-previous-regexp)
- (setq pages-directory-previous-regexp regexp))
-
- (if (interactive-p)
- (message "Creating directory for: %s "
- (buffer-name)))
-
- (let ((buffer (current-buffer))
- (pages-directory-buffer
- (concat pages-directory-prefix " " (buffer-name) " "))
- (linenum 1)
- (pages-buffer-original-position (point))
- (pages-buffer-original-page 0))
-
- ;; `with-output-to-temp-buffer' binds the value of the variable
- ;; `standard-output' to the buffer named as its first argument,
- ;; but does not switch to that buffer.
- (with-output-to-temp-buffer pages-directory-buffer
- (save-excursion
- (set-buffer standard-output)
- (pages-directory-mode)
- (insert
- "==== Pages Directory: use `C-c C-c' to go to page under cursor. ====" ?\n)
- (setq pages-buffer buffer)
- (setq pages-pos-list nil))
-
- (if pages-list-all-headers-p
-
- ;; 1. If no prefix argument, list all headers
- (save-excursion
- (goto-char (point-min))
-
- ;; (a) Point is at beginning of buffer; but the first
- ;; page may not begin with a page-delimiter
- (save-restriction
- ;; If page delimiter is at beginning of buffer, skip it
- (if (and (save-excursion
- (re-search-forward page-delimiter nil t))
- (= 1 (match-beginning 0)))
- (goto-char (match-end 0)))
- (narrow-to-page)
- (pages-copy-header-and-position count-lines-p))
-
- ;; (b) Search within pages buffer for next page-delimiter
- (while (re-search-forward page-delimiter nil t)
- (pages-copy-header-and-position count-lines-p)))
-
- ;; 2. Else list headers whose pages match regexp.
- (save-excursion
- ;; REMOVED save-restriction AND widen FROM HERE
- (goto-char (point-min))
-
- ;; (a) Handle first page
- (save-restriction
- (narrow-to-page)
- ;; search for selection regexp
- (if (save-excursion (re-search-forward regexp nil t))
- (pages-copy-header-and-position count-lines-p)))
-
- ;; (b) Search for next page-delimiter
- (while (re-search-forward page-delimiter nil t)
- (save-restriction
- (narrow-to-page)
- ;; search for selection regexp
- (if (save-excursion (re-search-forward regexp nil t))
- (pages-copy-header-and-position count-lines-p)
- )))))
-
- (set-buffer standard-output)
- ;; Put positions in increasing order to go with buffer.
- (setq pages-pos-list (nreverse pages-pos-list))
- (if (interactive-p)
- (message "%d matching lines in: %s"
- (length pages-pos-list) (buffer-name buffer))))
- (pop-to-buffer pages-directory-buffer)
- (sit-for 0) ; otherwise forward-line fails if N > window height.
- (forward-line (if (= 0 pages-buffer-original-page)
- 1
- pages-buffer-original-page))))
-
- (defun pages-copy-header-and-position (count-lines-p)
- "Copy page header and its position to the Pages Directory.
- Only arg non-nil, count lines in page and insert before header.
- Used by `pages-directory' function."
-
- (let (position line-count)
-
- (if count-lines-p
- (save-excursion
- (save-restriction
- (narrow-to-page)
- (setq line-count (count-lines (point-min) (point-max))))))
-
- ;; Keep track of page for later cursor positioning
- (if (<= (point) pages-buffer-original-position)
- (setq pages-buffer-original-page
- (1+ pages-buffer-original-page)))
-
- (save-excursion
- ;; go to first non-blank char after the page-delimiter
- (skip-chars-forward " \t\n")
- ;; set the marker here; this the place to which the
- ;; `pages-directory-goto' command will go
- (setq position (make-marker))
- (set-marker position (point))
- (let ((start (point))
- (end (save-excursion (end-of-line) (point))))
- ;; change to directory buffer
- (set-buffer standard-output)
- ;; record page position
- (setq pages-pos-list (cons position pages-pos-list))
- ;; insert page header
- (insert-buffer-substring buffer start end))
-
- (if count-lines-p
- (save-excursion
- (beginning-of-line)
- (insert (format "%3d: " line-count))))
-
- (terpri))
- (forward-line 1)))
-
- (defun pages-directory-mode ()
- "Mode for handling the pages-directory buffer.
-
- Move point to one of the lines in this buffer, then use \\[pages-directory-goto] to go
- to the same line in the pages buffer."
-
- (kill-all-local-variables)
- (use-local-map pages-directory-map)
- (setq major-mode 'pages-directory-mode)
- (setq mode-name "Pages-Directory")
- (make-local-variable 'pages-buffer)
- (make-local-variable 'pages-pos-list)
- (make-local-variable 'pages-directory-buffer-narrowing-p))
-
- (defun pages-directory-goto ()
- "Go to the corresponding line in the pages buffer."
-
- ;;; This function is mostly a copy of `occur-mode-goto-occurrence'
-
- (interactive)
- (if (or (not pages-buffer)
- (not (buffer-name pages-buffer)))
- (progn
- (setq pages-buffer nil
- pages-pos-list nil)
- (error "Buffer in which pages were found is deleted.")))
- (beginning-of-line)
- (let* ((pages-number (1- (count-lines (point-min) (point))))
- (pos (nth pages-number pages-pos-list))
- (end-of-directory-p (eobp))
- (narrowing-p pages-directory-buffer-narrowing-p))
- (pop-to-buffer pages-buffer)
- (widen)
- (if end-of-directory-p
- (goto-char (point-max))
- (goto-char (marker-position pos)))
- (if narrowing-p (narrow-to-page))))
-
-
- ;;;; The `pages-directory-for-addresses' function and ancillary code
-
- (defvar pages-addresses-file-name "~/addresses"
- "*Standard name for file of addresses. Entries separated by `page-delimiter'.
- Used by `pages-directory-for-addresses' function.")
-
- (defvar pages-directory-for-addresses-narrowing-p t
- "*If non-nil, `pages-directory-goto' narrows addresses buffer to entry.")
-
- (defun pages-directory-for-addresses (&optional filename)
- "Find addresses file and display its directory.
- By default, create and display directory of `pages-addresses-file-name'.
- Optional argument is FILENAME. In interactive use, with prefix
- argument, prompt for file name and provide completion.
-
- Move point to one of the lines in the displayed directory,
- then use C-c C-c to go to the same line in the addresses buffer."
-
- (interactive
- (list (if current-prefix-arg
- (read-file-name "Filename: " pages-addresses-file-name))))
-
- (if (interactive-p)
- (message "Creating directory for: %s "
- (or filename pages-addresses-file-name)))
- (if (file-exists-p (or filename pages-addresses-file-name))
- (progn
- (set-buffer
- (find-file-noselect
- (expand-file-name
- (or filename pages-addresses-file-name))))
- (widen)
- (pages-directory t nil nil)
- (pages-directory-address-mode)
- (setq pages-directory-buffer-narrowing-p
- pages-directory-for-addresses-narrowing-p)
- (delete-other-windows)
- (save-excursion
- (goto-char (point-min))
- (delete-region (point) (save-excursion (end-of-line) (point)))
- (insert
- "=== Address List Directory: use `C-c C-c' to go to page under cursor. ===")
- (set-buffer-modified-p nil)
- ))
- (error "No addresses file found!")))
-
- (defun pages-directory-address-mode ()
- "Mode for handling the Addresses Directory buffer.
-
- Move point to one of the lines in this buffer, then use C-c C-c to go
- to the same line in the pages buffer."
-
- (use-local-map pages-directory-map)
- (setq major-mode 'pages-directory-address-mode)
- (setq mode-name "Addresses Directory")
- (make-local-variable 'pages-buffer)
- (make-local-variable 'pages-pos-list)
- (make-local-variable 'pages-directory-buffer-narrowing-p))
-
- ;;; page-ext.el ends here
-
-