lisp/filesets.el

   1 ;;; filesets.el --- handle group of files -*- coding: utf-8 -*-
   2
   3 ;; Copyright (C) 2002-2015 Free Software Foundation, Inc.
   4
   5 ;; Author: Thomas Link <sanobast-emacs@yahoo.de>
   6 ;; Maintainer: emacs-devel@gnu.org
   7 ;; Keywords: filesets convenience
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Code:
  25
  26 (defvar filesets-version "1.8.4")
  27 (defvar filesets-homepage
  28   "http://members.a1.net/t.link/CompEmacsFilesets.html")
  29
  30 ;;; Commentary:
  31
  32 ;; Define filesets, which can be opened or saved with the power of one or
  33 ;; two mouse clicks only.  A fileset is either a list of files, a file
  34 ;; pattern, a base directory and a search pattern (for files), or an
  35 ;; inclusion group (i.e. a base file including other files).
  36
  37 ;; Usage:
  38 ;; 1. Put (require 'filesets) and (filesets-init) in your init file.
  39 ;; 2. Type ;; M-x filesets-edit or choose "Edit Filesets" from the menu.
  40 ;; 3. Save your customizations.
  41
  42 ;; Caveat: Fileset names have to be unique.
  43
  44 ;; Filesets.el adds a nifty filesets menu to your menubar.  If you change
  45 ;; your filesets on the fly, don't forget to select "Save Filesets" from
  46 ;; the menu.
  47
  48 ;; Pressing on the first item in the submenu will open all files at once.
  49 ;; Define your own function, e.g. browse-url, for opening a fileset's
  50 ;; files.  Or define external viewers for opening files with other
  51 ;; programs.  See `filesets-external-viewers'.
  52
  53 ;; BTW, if you close a fileset, files, which have been changed, will
  54 ;; be silently saved.  Change this behavior by setting
  55 ;; `filesets-save-buffer-fn'.
  56
  57 ;;; Supported modes for inclusion groups (`filesets-ingroup-patterns'):
  58 ;; - Elisp
  59 ;; - Emacs-Wiki (simple names only)
  60 ;; - LaTeX
  61
  62
  63
  64 ;;; Known bugs:
  65
  66
  67 ;;; To do:
  68
  69 ;;- better handling of different customization scenarios
  70
  71 ;; Data gathering should be better separated from building the menu
  72 ;; so that one could (1) use filesets without installing the menu
  73 ;; and (2) create new "frontends" to speedbar and others.
  74
  75 ;; The functionality to call external viewers should be isolated in
  76 ;; an extra package and possibly integrated with the MIME
  77 ;; handling.
  78
  79 ;;; Credits:
  80
  81 ;; Helpful suggestions (but no significant code) were contributed by
  82
  83 ;;- Christoph Conrad (at gmx de)
  84 ;;- Christian Ohler (at Informatik Uni-Oldenburg DE)
  85 ;;- Richard Stallman aka RMS (at gnu org)
  86 ;;- Per Abrahamsen aka abraham (at dina kvl dk)
  87
  88
  89 ;;; Code:
  90
  91 (eval-when-compile (require 'cl-lib))
  92
  93 ;;; Some variables
  94
  95 (defvar filesets-menu-cache nil
  96   "The whole filesets menu.")
  97 (defvar filesets-cache-version nil
  98   "Filesets' cached version number.")
  99 (defvar filesets-cache-hostname nil
 100   "Filesets' cached system name.")
 101
 102 (defvar filesets-ingroup-cache nil
 103   "A plist containing files and their ingroup data.")
 104 (defvar filesets-ingroup-files nil
 105   "List of files already processed when searching for included files.")
 106
 107 (defvar filesets-has-changed-flag t
 108   "Non-nil means some fileset definition has changed.")
 109 (defvar filesets-submenus nil
 110   "An association list with filesets menu data.")
 111 (defvar filesets-updated-buffers nil
 112   "A list of buffers with updated menu bars.")
 113 (defvar filesets-menu-use-cached-flag nil
 114   "Use cached data.  See `filesets-menu-ensure-use-cached' for details.")
 115 (defvar filesets-update-cache-file-flag nil
 116   "Non-nil means the cache needs updating.")
 117 (defvar filesets-ignore-next-set-default nil
 118   "List of custom variables for which the next `set-default' will be ignored.")
 119
 120 (defvar filesets-output-buffer-flag nil
 121   "Non-nil means the current buffer is an output buffer created by filesets.
 122 Is buffer local variable.")
 123
 124 (defvar filesets-verbosity 1
 125   "An integer defining the level of verbosity.
 126 0 means no messages at all.")
 127
 128 (defvar filesets-menu-ensure-use-cached
 129   (and (featurep 'xemacs)
 130        (if (fboundp 'emacs-version>=)
 131            (not (emacs-version>= 21 5))))
 132   "Make sure (X)Emacs uses filesets' cache.
 133
 134 Well, if you use XEmacs (prior to 21.5?) custom.el is loaded after
 135 init.el.  This means that settings saved in the cache file (see
 136 `filesets-menu-cache-file') will be overwritten by custom.el.  In order
 137 to ensure the use of the cache file, set this variable to t -- which is
 138 the default for XEmacs prior to 21.5.  If you want to change this value
 139 put \"(setq filesets-menu-ensure-use-cached VALUE)\" into your startup
 140 file -- before loading filesets.el.
 141
 142 So, when should you think about setting this value to t? If filesets.el
 143 is loaded before user customizations.  Thus, if (require 'filesets)
 144 precedes the `custom-set-variables' command or, for XEmacs, if init.el
 145 is loaded before custom.el, set this variable to t.")
 146
 147
 148 ;;; utils
 149 (defun filesets-filter-list (lst cond-fn)
 150   "Remove all elements not conforming to COND-FN from list LST.
 151 COND-FN takes one argument: the current element."
 152 ;  (cl-remove 'dummy lst :test (lambda (dummy elt)
 153 ;                             (not (funcall cond-fn elt)))))
 154   (let ((rv nil))
 155     (dolist (elt lst rv)
 156       (when (funcall cond-fn elt)
 157         (setq rv (append rv (list elt)))))))
 158
 159 (defun filesets-ormap (fsom-pred lst)
 160   "Return the tail of LST for the head of which FSOM-PRED is non-nil."
 161   (let ((fsom-lst lst)
 162         (fsom-rv nil))
 163     (while (and (not (null fsom-lst))
 164                 (null fsom-rv))
 165       (if (funcall fsom-pred (car fsom-lst))
 166           (setq fsom-rv fsom-lst)
 167         (setq fsom-lst (cdr fsom-lst))))
 168     fsom-rv))
 169
 170 (defun filesets-some (fss-pred fss-lst)
 171   "Return non-nil if FSS-PRED is non-nil for any element of FSS-LST.
 172 Like `some', return the first value of FSS-PRED that is non-nil."
 173   (catch 'exit
 174     (dolist (fss-this fss-lst nil)
 175       (let ((fss-rv (funcall fss-pred fss-this)))
 176         (when fss-rv
 177           (throw 'exit fss-rv))))))
 178 ;(fset 'filesets-some 'cl-some) ;; or use the cl function
 179
 180 (defun filesets-member (fsm-item fsm-lst &rest fsm-keys)
 181   "Find the first occurrence of FSM-ITEM in FSM-LST.
 182 It is supposed to work like cl's `member*'.  At the moment only the :test
 183 key is supported."
 184   (let ((fsm-test (or (plist-get fsm-keys ':test)
 185                       (function equal))))
 186     (filesets-ormap (lambda (fsm-this)
 187                       (funcall fsm-test fsm-item fsm-this))
 188                     fsm-lst)))
 189 ;(fset 'filesets-member 'cl-member) ;; or use the cl function
 190
 191 (defun filesets-sublist (lst beg &optional end)
 192   "Get the sublist of LST from BEG to END - 1."
 193   (let ((rv  nil)
 194         (i   beg)
 195         (top (or end
 196                  (length lst))))
 197     (while (< i top)
 198       (setq rv (append rv (list (nth i lst))))
 199       (setq i (+ i 1)))
 200     rv))
 201
 202 (defun filesets-select-command (cmd-list)
 203   "Select one command from CMD-LIST -- a string with space separated names."
 204   (let ((this (shell-command-to-string
 205                (format "which --skip-alias %s 2> /dev/null | head -n 1"
 206                        cmd-list))))
 207     (if (equal this "")
 208         nil
 209       (file-name-nondirectory (substring this 0 (- (length this) 1))))))
 210
 211 (defun filesets-which-command (cmd)
 212   "Call \"which CMD\"."
 213   (shell-command-to-string (format "which %s" cmd)))
 214
 215 (defun filesets-which-command-p (cmd)
 216   "Call \"which CMD\" and return non-nil if the command was found."
 217   (when (string-match-p (format "\\(/[^/]+\\)?/%s" cmd)
 218                         (filesets-which-command cmd))
 219     cmd))
 220
 221 (defun filesets-message (level &rest args)
 222   "Show a message only if LEVEL is greater or equal then `filesets-verbosity'."
 223   (when (<= level (abs filesets-verbosity))
 224     (apply 'message args)))
 225
 226
 227 ;;; config file
 228 (defun filesets-save-config ()
 229   "Save filesets' customizations."
 230   (interactive)
 231   (customize-save-customized))
 232
 233 (defun filesets-reset-fileset (&optional fileset no-cache)
 234   "Reset the cached values for one or all filesets."
 235   (if fileset
 236       (setq filesets-submenus (lax-plist-put filesets-submenus fileset nil))
 237     (setq filesets-submenus nil))
 238   (setq filesets-has-changed-flag t)
 239   (setq filesets-update-cache-file-flag (or filesets-update-cache-file-flag
 240                                             (not no-cache))))
 241
 242 (defun filesets-set-config (fileset var val)
 243   "Set-default wrapper function."
 244   (filesets-reset-fileset fileset)
 245   (set-default var val))
 246 ;  (customize-set-variable var val))
 247 ;  (filesets-build-menu))
 248
 249 ;; It seems this is a workaround for the XEmacs issue described in the
 250 ;; doc-string of filesets-menu-ensure-use-cached.  Under Emacs this is
 251 ;; essentially just `set-default'.
 252 (defun filesets-set-default (sym val &optional init-flag)
 253   "Set-default wrapper function used in conjunction with `defcustom'.
 254 If SYM is in the list `filesets-ignore-next-set-default', delete
 255 it from that list, and return nil.  Otherwise, set the value of
 256 SYM to VAL and return t.  If INIT-FLAG is non-nil, set with
 257 `custom-initialize-set', otherwise with `set-default'."
 258   (let ((ignore-flag (member sym filesets-ignore-next-set-default)))
 259     (if ignore-flag
 260         (setq filesets-ignore-next-set-default
 261               (delete sym filesets-ignore-next-set-default))
 262       (if init-flag
 263           (custom-initialize-set sym val)
 264         (set-default sym val)))
 265     (not ignore-flag)))
 266
 267 (defun filesets-set-default! (sym val)
 268   "Call `filesets-set-default' and reset cached data (i.e. rebuild menu)."
 269   (when (filesets-set-default sym val)
 270     (filesets-reset-fileset)))
 271
 272 (defun filesets-set-default+ (sym val)
 273   "Call `filesets-set-default' and reset filesets' standard menu."
 274   (when (filesets-set-default sym val)
 275     (setq filesets-has-changed-flag t)))
 276 ;    (filesets-reset-fileset nil t)))
 277
 278 (defvar filesets-data)
 279
 280 (defun filesets-data-set-default (sym val)
 281   "Set the default for `filesets-data'."
 282   (if filesets-menu-use-cached-flag
 283       (setq filesets-menu-use-cached-flag nil)
 284     (when (default-boundp 'filesets-data)
 285       (let ((modified-filesets
 286              (filesets-filter-list val
 287                                    (lambda (x)
 288                                      (let ((name (car x))
 289                                            (data (cdr x)))
 290                                        (let ((elt (assoc name filesets-data)))
 291                                          (or (not elt)
 292                                              (not (equal data (cdr elt))))))))))
 293         (dolist (x modified-filesets)
 294           (filesets-reset-fileset (car x))))))
 295   (filesets-set-default sym val))
 296 \f
 297 ;;; configuration
 298 (defgroup filesets nil
 299   "The fileset swapper."
 300   :prefix "filesets-"
 301   :group 'convenience
 302   :version "22.1")
 303
 304 (defcustom filesets-menu-name "Filesets"
 305   "Filesets' menu name."
 306   :set (function filesets-set-default)
 307   :type 'string
 308   :group 'filesets)
 309
 310 (defcustom filesets-menu-path '("File") ; cf recentf-menu-path
 311   "The menu under which the filesets menu should be inserted.
 312 See `add-submenu' for documentation."
 313   :set (function filesets-set-default)
 314   :type '(choice (const :tag "Top Level" nil)
 315                  (sexp :tag "Menu Path"))
 316   :version "23.1"                       ; was nil
 317   :group 'filesets)
 318
 319 (defcustom filesets-menu-before "Open File..." ; cf recentf-menu-before
 320   "The name of a menu before which this menu should be added.
 321 See `add-submenu' for documentation."
 322   :set (function filesets-set-default)
 323   :type '(choice (string :tag "Name")
 324                  (const :tag "Last" nil))
 325   :version "23.1"                       ; was "File"
 326   :group 'filesets)
 327
 328 (defcustom filesets-menu-in-menu nil
 329   "Use that instead of `current-menubar' as the menu to change.
 330 See `add-submenu' for documentation."
 331   :set (function filesets-set-default)
 332   :type 'sexp
 333   :group 'filesets)
 334
 335 (defcustom filesets-menu-shortcuts-flag t
 336   "Non-nil means to prepend menus with hopefully unique shortcuts."
 337   :set (function filesets-set-default!)
 338   :type 'boolean
 339   :group 'filesets)
 340
 341 (defcustom filesets-menu-shortcuts-marker "%_"
 342   "String for marking menu shortcuts."
 343   :set (function filesets-set-default!)
 344   :type 'string
 345   :group 'filesets)
 346
 347 ;;(defcustom filesets-menu-cnvfp-flag nil
 348 ;;  "Non-nil means show \"Convert :pattern to :files\" entry for :pattern menus."
 349 ;;  :set (function filesets-set-default!)
 350 ;;  :type 'boolean
 351 ;;  :group 'filesets)
 352
 353 (defcustom filesets-menu-cache-file
 354   (locate-user-emacs-file "filesets-cache.el")
 355   "File to be used for saving the filesets menu between sessions.
 356 Set this to \"\", to disable caching of menus.
 357 Don't forget to check out `filesets-menu-ensure-use-cached'."
 358   :set (function filesets-set-default)
 359   :type 'file
 360   :group 'filesets)
 361 (put 'filesets-menu-cache-file 'risky-local-variable t)
 362
 363 (defcustom filesets-menu-cache-contents
 364   '(filesets-be-docile-flag
 365     filesets-submenus
 366     filesets-menu-cache
 367     filesets-ingroup-cache)
 368   "Stuff we want to save in `filesets-menu-cache-file'.
 369
 370 Possible uses: don't save configuration data in the main startup files
 371 but in filesets's own cache.  In this case add `filesets-data' to this
 372 list.
 373
 374 There is a second reason for putting `filesets-data' on this list.  If
 375 you frequently add and remove buffers on the fly to :files filesets, you
 376 don't need to save your customizations if `filesets-data' is being
 377 mirrored in the cache file.  In this case the version in the cache file
 378 is the current one, and the version in your startup file will be
 379 silently updated later on.
 380
 381 If you want caching to work properly, at least `filesets-submenus',
 382 `filesets-menu-cache', and `filesets-ingroup-cache' should be in this
 383 list.
 384
 385 Don't forget to check out `filesets-menu-ensure-use-cached'."
 386   :set (function filesets-set-default)
 387   :type '(repeat
 388           (choice :tag "Variable"
 389                   (const :tag "filesets-submenus"
 390                          :value filesets-submenus)
 391                   (const :tag "filesets-menu-cache"
 392                          :value filesets-menu-cache)
 393                   (const :tag "filesets-ingroup-cache"
 394                          :value filesets-ingroup-cache)
 395                   (const :tag "filesets-data"
 396                          :value filesets-data)
 397                   (const :tag "filesets-external-viewers"
 398                          :value filesets-external-viewers)
 399                   (const :tag "filesets-ingroup-patterns"
 400                          :value filesets-ingroup-patterns)
 401                   (const :tag "filesets-be-docile-flag"
 402                          :value filesets-be-docile-flag)
 403                   (sexp :tag "Other" :value nil)))
 404   :group 'filesets)
 405
 406 (define-obsolete-variable-alias 'filesets-cache-fill-content-hooks
 407   'filesets-cache-fill-content-hook "24.3")
 408 (defcustom filesets-cache-fill-content-hook nil
 409   "Hook run when writing the contents of filesets' cache file.
 410
 411 The hook is called with the cache file as current buffer and the cursor
 412 at the last position.  I.e. each hook has to make sure that the cursor is
 413 at the last position.
 414
 415 Possible uses: If you don't want to save `filesets-data' in your normal
 416 configuration file, you can add a something like this
 417
 418         \(lambda ()
 419               \(insert (format \"(setq-default filesets-data '%S)\"
 420                               filesets-data))
 421               \(newline 2))
 422
 423 to this hook.
 424
 425 Don't forget to check out `filesets-menu-ensure-use-cached'."
 426   :set (function filesets-set-default)
 427   :type 'hook
 428   :group 'filesets)
 429
 430 (defcustom filesets-cache-hostname-flag nil
 431   "Non-nil means cache the hostname.
 432 If the current name differs from the cached one,
 433 rebuild the menu and create a new cache file."
 434   :set (function filesets-set-default)
 435   :type 'boolean
 436   :group 'filesets)
 437
 438 (defcustom filesets-cache-save-often-flag nil
 439   "Non-nil means save buffer on every change of the filesets menu.
 440 If this variable is set to nil and if Emacs crashes, the cache and
 441 filesets-data could get out of sync.  Set this to t if this happens from
 442 time to time or if the fileset cache causes troubles."
 443   :set (function filesets-set-default)
 444   :type 'boolean
 445   :group 'filesets)
 446
 447 (defcustom filesets-max-submenu-length 25
 448   "Maximum length of submenus.
 449 Set this value to 0 to turn menu splitting off.  BTW, parts of submenus
 450 will not be rewrapped if their length exceeds this value."
 451   :set (function filesets-set-default)
 452   :type 'integer
 453   :group 'filesets)
 454
 455 (defcustom filesets-max-entry-length 50
 456   "Truncate names of split submenus to this length."
 457   :set (function filesets-set-default)
 458   :type 'integer
 459   :group 'filesets)
 460
 461 (defcustom filesets-browse-dir-function 'dired
 462   "A function or command used for browsing directories.
 463 When using an external command, \"%s\" will be replaced with the
 464 directory's name.
 465
 466 Note: You have to manually rebuild the menu if you change this value."
 467   :set (function filesets-set-default)
 468   :type '(choice :tag "Function:"
 469                  (const :tag "dired"
 470                         :value dired)
 471                  (list :tag "Command"
 472                        :value ("" "%s")
 473                        (string :tag "Name")
 474                        (string :tag "Arguments"))
 475                  (function :tag "Function"
 476                            :value nil))
 477   :group 'filesets)
 478
 479 (defcustom filesets-open-file-function 'filesets-find-or-display-file
 480   "The function used for opening files.
 481
 482 `filesets-find-or-display-file' ... Filesets' default function for
 483 visiting files.  This function checks if an external viewer is defined
 484 for a specific file type.  Either this viewer, if defined, or
 485 `find-file' will be used to visit a file.
 486
 487 `filesets-find-file' ... An alternative function that always uses
 488 `find-file'.  If `filesets-be-docile-flag' is true, a file, which isn't
 489 readable, will not be opened.
 490
 491 Caveat: Changes will take effect only after rebuilding the menu."
 492   :set (function filesets-set-default)
 493   :type '(choice :tag "Function:"
 494                  (const :tag "filesets-find-or-display-file"
 495                         :value filesets-find-or-display-file)
 496                  (const :tag "filesets-find-file"
 497                         :value filesets-find-file)
 498                  (function :tag "Function"
 499                            :value nil))
 500   :group 'filesets)
 501
 502 (defcustom filesets-save-buffer-function 'save-buffer
 503   "The function used to save a buffer.
 504 Caveat: Changes will take effect after rebuilding the menu."
 505   :set (function filesets-set-default)
 506   :type '(choice :tag "Function:"
 507                  (const :tag "save-buffer"
 508                         :value save-buffer)
 509                  (function :tag "Function"
 510                            :value nil))
 511   :group 'filesets)
 512
 513 (defcustom filesets-find-file-delay
 514   (if (and (featurep 'xemacs) gutter-buffers-tab-visible-p)
 515       0.5
 516     0)
 517   "Delay before calling `find-file'.
 518 This is for calls via `filesets-find-or-display-file'
 519 or `filesets-find-file'.
 520
 521 Set this to 0, if you don't use XEmacs's buffer tabs."
 522   :set (function filesets-set-default)
 523   :type 'number
 524   :group 'filesets)
 525
 526 (defcustom filesets-be-docile-flag nil
 527   "Non-nil means don't complain if a file or a directory doesn't exist.
 528 This is useful if you want to use the same startup files in different
 529 computer environments."
 530   :set (function filesets-set-default)
 531   :type 'boolean
 532   :group 'filesets)
 533
 534 (defcustom filesets-sort-menu-flag t
 535   "Non-nil means sort the filesets menu alphabetically."
 536   :set (function filesets-set-default)
 537   :type 'boolean
 538   :group 'filesets)
 539
 540 (defcustom filesets-sort-case-sensitive-flag t
 541   "Non-nil means sorting of the filesets menu is case sensitive."
 542   :set (function filesets-set-default)
 543   :type 'boolean
 544   :group 'filesets)
 545
 546 (defcustom filesets-tree-max-level 3
 547   "Maximum scan depth for directory trees.
 548 A :tree fileset is defined by a base directory the contents of which
 549 will be recursively added to the menu.  `filesets-tree-max-level' tells up
 550 to which level the directory structure should be scanned/listed,
 551 i.e. how deep the menu should be.  Try something like
 552
 553         \(\"HOME -- only one level\"
 554          \(:tree \"~\" \"^[^.].*[^~]$\")
 555          \(:tree-max-level 1)
 556          \(:filter-dirs-flag t))
 557         \(\"HOME -- up to 3 levels\"
 558          \(:tree \"~\" \"^[^.].*[^~]$\")
 559          \(:tree-max-level 3)
 560          \(:filter-dirs-flag t))
 561
 562 and it should become clear what this option is about.  In any case,
 563 including directory trees to the menu can take a lot of memory."
 564   :set (function filesets-set-default)
 565   :type 'integer
 566   :group 'filesets)
 567
 568 (defcustom filesets-commands
 569   `(("Isearch"
 570      multi-isearch-files
 571      (filesets-cmd-isearch-getargs))
 572     ("Isearch (regexp)"
 573      multi-isearch-files-regexp
 574      (filesets-cmd-isearch-getargs))
 575     ("Query Replace"
 576      perform-replace
 577      (filesets-cmd-query-replace-getargs))
 578     ("Query Replace (regexp)"
 579      perform-replace
 580      (filesets-cmd-query-replace-regexp-getargs))
 581     ("Grep <<selection>>"
 582      "grep"
 583      ("-n " filesets-get-quoted-selection " " "<<file-name>>"))
 584     ("Run Shell Command"
 585      filesets-cmd-shell-command
 586      (filesets-cmd-shell-command-getargs)))
 587   "Commands to run on filesets.
 588 An association list of names, functions, and an argument list (or a
 589 function that returns one) to be run on a filesets' files.
 590
 591 The argument <file-name> or <<file-name>> (quoted) will be replaced with
 592 the filename."
 593   :set (function filesets-set-default+)
 594   :type '(repeat :tag "Commands"
 595                  (list :tag "Definition" :value ("")
 596                        (string "Name")
 597                        (choice :tag "Command"
 598                                (string :tag "String")
 599                                (function :tag "Function"))
 600                        (repeat :tag "Argument List"
 601                                (choice :tag "Arguments"
 602                                        (sexp :tag "Sexp"
 603                                              :value nil)
 604                                        (string :tag "File Name"
 605                                                :value "<file-name>")
 606                                        (string :tag "Quoted File Name"
 607                                                :value "<<file-name>>")
 608                                        (function :tag "Function"
 609                                                  :value nil)))))
 610   :group 'filesets)
 611 (put 'filesets-commands 'risky-local-variable t)
 612
 613 (defcustom filesets-external-viewers
 614   (let
 615       ;; ((ps-cmd  (or (and (boundp 'my-ps-viewer) my-ps-viewer)
 616       ;;            (filesets-select-command "ggv gv")))
 617       ;;  (pdf-cmd (or (and (boundp 'my-ps-viewer) my-pdf-viewer)
 618       ;;            (filesets-select-command "xpdf acroread")))
 619       ;;  (dvi-cmd (or (and (boundp 'my-ps-viewer) my-dvi-viewer)
 620       ;;            (filesets-select-command "xdvi tkdvi")))
 621       ;;  (doc-cmd (or (and (boundp 'my-ps-viewer) my-doc-viewer)
 622       ;;            (filesets-select-command "antiword")))
 623       ;;  (pic-cmd (or (and (boundp 'my-ps-viewer) my-pic-viewer)
 624       ;;            (filesets-select-command "gqview ee display"))))
 625       ((ps-cmd  "ggv")
 626        (pdf-cmd "xpdf")
 627        (dvi-cmd "xdvi")
 628        (doc-cmd "antiword")
 629        (pic-cmd "gqview"))
 630     `(("^.+\\..?html?$" browse-url
 631        ((:ignore-on-open-all t)))
 632       ("^.+\\.pdf$" ,pdf-cmd
 633        ((:ignore-on-open-all t)
 634         (:ignore-on-read-text t)
 635         (:constraint-flag ,pdf-cmd)))
 636       ("^.+\\.e?ps\\(.gz\\)?$" ,ps-cmd
 637        ((:ignore-on-open-all t)
 638         (:ignore-on-read-text t)
 639         (:constraint-flag ,ps-cmd)))
 640       ("^.+\\.dvi$" ,dvi-cmd
 641        ((:ignore-on-open-all t)
 642         (:ignore-on-read-text t)
 643         (:constraint-flag ,dvi-cmd)))
 644       ("^.+\\.doc$" ,doc-cmd
 645        ((:capture-output t)
 646         (:ignore-on-read-text t)
 647         (:constraint-flag ,doc-cmd)))
 648       ("^.+\\.\\(tiff\\|xpm\\|gif\\|pgn\\)$" ,pic-cmd
 649        ((:ignore-on-open-all t)
 650         (:ignore-on-read-text t)
 651         (:constraint-flag ,pic-cmd)))))
 652   "Association list of file patterns and external viewers for use with
 653 `filesets-find-or-display-file'.
 654
 655 Has the form ((FILE-PATTERN VIEWER PROPERTIES) ...), VIEWER being either a
 656 function or a command name as string.
 657
 658 Properties is an association list determining filesets' behavior in
 659 several conditions.  Choose one from this list:
 660
 661 :ignore-on-open-all ... Don't open files of this type automatically --
 662 i.e. on open-all-files-events or when running commands
 663
 664 :capture-output ... capture an external viewer output
 665
 666 :constraintp FUNCTION ... use this viewer only if FUNCTION returns non-nil
 667
 668 :constraint-flag SEXP ... use this viewer only if SEXP evaluates to non-nil
 669
 670 :open-hook HOOK ... run hooks after spawning the viewer -- mainly useful
 671 in conjunction with :capture-output
 672
 673 :args (FORMAT-STRING or SYMBOL or FUNCTION) ... a list of arguments
 674 \(defaults to (list \"%S\")) when using shell commands
 675
 676 Avoid modifying this variable and achieve minor speed-ups by setting the
 677 variables my-ps-viewer, my-pdf-viewer, my-dvi-viewer, my-pic-viewer.
 678
 679 In order to view pdf or rtf files in an Emacs buffer, you could use these:
 680
 681
 682       \(\"^.+\\\\.pdf\\\\'\" \"pdftotext\"
 683        \((:capture-output t)
 684         \(:args (\"%S - | fmt -w \" window-width))
 685         \(:ignore-on-read-text t)
 686         \(:constraintp (lambda ()
 687                         \(and \(filesets-which-command-p \"pdftotext\")
 688                              \(filesets-which-command-p \"fmt\"))))))
 689       \(\"^.+\\\\.rtf\\\\'\" \"rtf2htm\"
 690        \((:capture-output t)
 691         \(:args (\"%S 2> /dev/null | w3m -dump -T text/html\"))
 692         \(:ignore-on-read-text t)
 693         \(:constraintp (lambda ()
 694                         \(and (filesets-which-command-p \"rtf2htm\")
 695                              \(filesets-which-command-p \"w3m\"))))))"
 696   :set (function filesets-set-default)
 697   :type '(repeat :tag "Viewer"
 698                  (list :tag "Definition"
 699                        :value ("^.+\\.suffix$" "")
 700                        (regexp :tag "Pattern")
 701                        (choice :tag "Viewer"
 702                                (symbol :tag "Function" :value nil)
 703                                (string :tag "Program" :value ""))
 704                        (repeat :tag "Properties"
 705                                (choice
 706                                 (list :tag ":constraintp"
 707                                       :value (:constraintp)
 708                                       (const :format ""
 709                                              :value :constraintp)
 710                                       (function :tag "Function"))
 711                                 (list :tag ":constraint-flag"
 712                                       :value (:constraint-flag)
 713                                       (const :format ""
 714                                              :value :constraint-flag)
 715                                       (sexp :tag "Symbol"))
 716                                 (list :tag ":ignore-on-open-all"
 717                                       :value (:ignore-on-open-all t)
 718                                       (const  :format ""
 719                                               :value :ignore-on-open-all)
 720                                       (boolean :tag "Boolean"))
 721                                 (list :tag ":ignore-on-read-text"
 722                                       :value (:ignore-on-read-text t)
 723                                       (const  :format ""
 724                                               :value :ignore-on-read-text)
 725                                       (boolean :tag "Boolean"))
 726                                 (list :tag ":args"
 727                                       :value (:args)
 728                                       (const :format ""
 729                                              :value :args)
 730                                       (repeat :tag "List"
 731                                               (choice :tag "Arguments"
 732                                                       (string :tag "String"
 733                                                               :value "")
 734                                                       (symbol :tag "Symbol"
 735                                                               :value nil)
 736                                                       (function :tag "Function"
 737                                                                 :value nil))))
 738                                 (list :tag ":open-hook"
 739                                       :value (:open-hook)
 740                                       (const :format ""
 741                                              :value :open-hook)
 742                                       (hook :tag "Hook"))
 743 ;                               (list :tag ":close-hook"
 744 ;                                     :value (:close-hook)
 745 ;                                     (const :format ""
 746 ;                                            :value :close-hook)
 747 ;                                     (hook :tag "Hook"))
 748                                 (list :tag ":capture-output"
 749                                       :value (:capture-output t)
 750                                       (const  :format ""
 751                                               :value :capture-output)
 752                                       (boolean :tag "Boolean"))))))
 753   :group 'filesets)
 754 (put 'filesets-external-viewers 'risky-local-variable t)
 755
 756 (defcustom filesets-ingroup-patterns
 757   '(("^.+\\.tex$" t
 758      (((:name "Package")
 759        (:pattern "\\\\usepackage\\W*\\(\\[[^\]]*\\]\\W*\\)?{\\W*\\(.+\\)\\W*}")
 760        (:match-number 2)
 761        (:stub-flag t)
 762        (:get-file-name (lambda (master file)
 763                          (filesets-which-file master
 764                                               (concat file ".sty")
 765                                               (filesets-convert-path-list
 766                                                (or (getenv "MY_TEXINPUTS")
 767                                                    (getenv "TEXINPUTS")))))))
 768       ((:name "Include")
 769        (:pattern "\\\\include\\W*{\\W*\\(.+\\)\\W*}")
 770        (:get-file-name (lambda (master file)
 771                          (filesets-which-file master
 772                                               (concat file ".tex")
 773                                               (filesets-convert-path-list
 774                                                (or (getenv "MY_TEXINPUTS")
 775                                                    (getenv "TEXINPUTS"))))))
 776        (:scan-depth 5))
 777       ((:name "Input")
 778        (:pattern "\\\\input\\W*{\\W*\\(.+\\)\\W*}")
 779        (:stubp (lambda (a b) (not (filesets-files-in-same-directory-p a b))))
 780        (:get-file-name (lambda (master file)
 781                          (filesets-which-file master
 782                                               (concat file ".tex")
 783                                               (filesets-convert-path-list
 784                                                (or (getenv "MY_TEXINPUTS")
 785                                                    (getenv "TEXINPUTS"))))))
 786        (:scan-depth 5))
 787       ((:name "Bibliography")
 788        (:pattern "\\\\bibliography\\W*{\\W*\\(.+\\)\\W*}")
 789        (:get-file-name (lambda (master file)
 790                          (filesets-which-file master
 791                                               (concat file ".bib")
 792                                               (filesets-convert-path-list
 793                                                (or (getenv "MY_BIBINPUTS")
 794                                                    (getenv "BIBINPUTS")))))))))
 795     ("^.+\\.el$" t
 796      (((:name "Require")
 797        (:pattern "(require\\W+'\\(.+\\))")
 798        (:stubp (lambda (a b) (not (filesets-files-in-same-directory-p a b))))
 799        (:get-file-name (lambda (master file)
 800                          (filesets-which-file master
 801                                               (concat file ".el")
 802                                               load-path))))
 803       ((:name "Load")
 804        (:pattern "(load\\(-library\\)?\\W+\"\\(.+\\)\")")
 805        (:match-number 2)
 806        (:get-file-name (lambda (master file)
 807                          (filesets-which-file master file load-path))))))
 808     ("^\\([A-ZÄÖÜ][a-zäöüß]+\\([A-ZÄÖÜ][a-zäöüß]+\\)+\\)$" t
 809      (((:pattern "\\<\\([A-ZÄÖÜ][a-zäöüß]+\\([A-ZÄÖÜ][a-zäöüß]+\\)+\\)\\>")
 810        (:scan-depth 5)
 811        (:stubp (lambda (a b) (not (filesets-files-in-same-directory-p a b))))
 812        (:case-sensitive t)
 813        (:get-file-name (lambda (master file)
 814                          (filesets-which-file
 815                           master
 816                           file
 817                           (if (boundp 'emacs-wiki-directories)
 818                               emacs-wiki-directories
 819                             nil))))))))
 820
 821   "Inclusion group definitions.
 822
 823 Define how to find included file according to a file's mode (being
 824 defined by a file pattern).
 825
 826 A valid entry has the form (FILE-PATTERN REMOVE-DUPLICATES-FLAG
 827 CMD-DEF1 ...), CMD-DEF1 being a plist containing the fields :pattern
 828 \(mandatory), :name, :get-file-name, :match-number, :scan-depth,
 829 :preprocess, :case-sensitive.
 830
 831 File Pattern ... A regexp matching the file's name for which the
 832 following rules should be applied.
 833
 834 Remove Duplicates ... If t, only the first occurrence of an included
 835 file is retained.  (See below for a full explanation.)
 836
 837 :name STRING ... This pattern's name.
 838
 839 :pattern REGEXP ... A regexp matching the command.  This regexp has to
 840 include a group that holds the name of the included file.
 841
 842 :get-file-name FUNCTION (default: `filesets-which-file') ... A function
 843 that takes two arguments (the path of the master file and the name
 844 of the included file) and returns a valid path or nil -- if the
 845 subfile can't be found.
 846
 847 :match-number INTEGER (default: 1) ... The number of the match/group
 848 in the pattern holding the subfile's name.  0 refers the whole
 849 match, 1 to the first group.
 850
 851 :stubp FUNCTION ... If (FUNCTION MASTER INCLUDED-FILE) returns non-nil,
 852 INCLUDED-FILE is a stub -- see below.
 853
 854 :stub-flag ... Files of this type are stubs -- see below.
 855
 856 :scan-depth INTEGER (default: 0) ... Whether included files should be
 857 rescanned.  Set this to 0 to disable re-scanning of included file.
 858
 859 :preprocess FUNCTION ... A function modifying a buffer holding the
 860 master file so that pattern matching becomes easier.  This is usually
 861 used to narrow a buffer to the relevant region.  This function could also
 862 be destructive and simply delete non-relevant text.
 863
 864 :case-sensitive BOOLEAN (default: nil) ... Whether a pattern is
 865 case-sensitive or not.
 866
 867
 868 Stubs:
 869
 870 First, a stub is a file that shows up in the menu but will not be
 871 included in an ingroup's file listing -- i.e. filesets will never
 872 operate on this file automatically.  Secondly, in opposition to normal
 873 files stubs are not scanned for new inclusion groups.  This is useful if
 874 you want to have quick access to library headers.
 875
 876 In the menu, an asterisk is appended to the stub's name.
 877
 878
 879 Remove Duplicates:
 880
 881 E.g. File A and file B refer to file X; X refers to A.  If
 882 you choose not to remove duplicates the tree would look like:
 883
 884     M + A - X - A ...
 885         B - X - A ...
 886
 887 As you can see, there is some chance that you run in circles.
 888 Nevertheless, up to some degree this could still be what you want.
 889
 890 With duplicates removed, it would be:
 891
 892     M + A - X
 893         B"
 894   :set (function filesets-set-default)
 895   :type '(repeat
 896           :tag "Include"
 897           (list
 898            :tag "Definition" :value ("^.+\\.suffix$" t)
 899            (regexp :tag "File Pattern" :value "^.+\\.suffix$")
 900            (boolean :tag "Remove Duplicates" :value t)
 901            (repeat :tag "Commands"
 902                    (repeat :tag "Command"
 903                            (choice
 904                             :tag "Definition"
 905                             (list :tag ":name"
 906                                   :value (:name "")
 907                                   (const :format "" :value :name)
 908                                   (string :tag "String"))
 909                             (list :tag ":pattern"
 910                                   :value (:pattern "\\<CMD\\W*\\(.+\\)\\>")
 911                                   (const :format "" :value :pattern)
 912                                   (regexp :tag "RegExp"))
 913                             (list :tag ":get-file-name"
 914                                   :value (:get-file-name)
 915                                   (const :format "" :value :get-file-name)
 916                                   (function :tag "Function"))
 917                             (list :tag ":match-number"
 918                                   :value (:match-number 1)
 919                                   (const :format "" :value :match-number)
 920                                   (integer :tag "Integer"))
 921                             (list :tag ":stub-flag"
 922                                   :value (:stub-flag t)
 923                                   (const :format "" :value :stub-flag)
 924                                   (boolean :tag "Boolean"))
 925                             (list :tag ":stubp"
 926                                   :value (:stubp)
 927                                   (const :format "" :value :stubp)
 928                                   (function :tag "Function"))
 929                             (list :tag ":scan-depth"
 930                                   :value (:scan-depth 0)
 931                                   (const :format "" :value :scan-depth)
 932                                   (integer :tag "Integer"))
 933                             (list :tag ":case-sensitive"
 934                                   :value (:case-sensitive)
 935                                   (const :format "" :value :case-sensitive)
 936                                   (boolean :tag "Boolean"))
 937                             (list :tag ":preprocess"
 938                                   :value (:preprocess)
 939                                   (const :format "" :value :preprocess)
 940                                   (function :tag "Function")))))))
 941   :group 'filesets)
 942 (put 'filesets-ingroup-patterns 'risky-local-variable t)
 943
 944 (defcustom filesets-data nil
 945   "Fileset definitions.
 946
 947 A fileset is either a list of files, a file pattern, a base directory
 948 and a search pattern (for files), or a base file.  Changes to this
 949 variable will take effect after rebuilding the menu.
 950
 951 Caveat: Fileset names have to be unique.
 952
 953 Example definition:
 954       '\(\(\"My Wiki\"
 955          \(:ingroup \"~/Etc/My-Wiki/WikiContents\"))
 956         \(\"My Homepage\"
 957          \(:pattern \"~/public_html/\" \"^.+\\\\.html$\")
 958          \(:open filesets-find-file))
 959         \(\"User Configuration\"
 960          \(:files \"~/.xinitrc\"
 961                  \"~/.bashrc\"
 962                  \"~/.bash_profile\"))
 963         \(\"HOME\"
 964          \(:tree \"~\" \"^[^.].*[^~]$\")
 965          \(:filter-dirs-flag t)))
 966
 967 `filesets-data' is a list of (NAME-AS-STRING . DEFINITION), DEFINITION
 968 being an association list with the fields:
 969
 970 :files FILE-1 .. FILE-N ... a list of files belonging to a fileset
 971
 972 :ingroup FILE-NAME ... an inclusion group's base file.
 973
 974 :tree ROOT-DIR PATTERN ... a base directory and a file pattern
 975
 976 :pattern DIR PATTERN ... a base directory and a regexp matching
 977                          files in that directory.  Usually,
 978                          PATTERN has the form '^REGEXP$'.  Unlike
 979                          :tree, this form does not descend
 980                          recursively into subdirectories.
 981
 982 :filter-dirs-flag BOOLEAN ... is only used in conjunction with :tree.
 983
 984 :tree-max-level INTEGER ... recurse into directories this many levels
 985 \(see `filesets-tree-max-level' for a full explanation)
 986
 987 :dormant-flag BOOLEAN ... non-nil means don't show this item in the
 988 menu; dormant filesets can still be manipulated via commands available
 989 from the minibuffer -- e.g. `filesets-open', `filesets-close', or
 990 `filesets-run-cmd'
 991
 992 :dormant-p FUNCTION ... a function returning :dormant-flag
 993
 994 :open FUNCTION ... the function used to open file belonging to this
 995 fileset.  The function takes a file name as argument
 996
 997 :save FUNCTION ... the function used to save file belonging to this
 998 fileset; it takes no arguments, but works on the current buffer.
 999
1000 Either :files, :pattern, :tree, or :ingroup must be supplied.  :files
1001 overrules :tree, :tree overrules :pattern, :pattern overrules :ingroup,
1002 i.e. these tags are mutually exclusive.  The fields :open and :save are
1003 optional.
1004
1005 In conjunction with the :tree tag, :save is void.  :open refers to the
1006 function used for opening files in a directory, not for opening the
1007 directory.  For browsing directories, `filesets-browse-dir-function' is used.
1008
1009 Before using :ingroup, make sure that the file type is already
1010 defined in `filesets-ingroup-patterns'."
1011   :group 'filesets
1012   :set (function filesets-data-set-default)
1013   :type '(repeat
1014           (cons :tag "Fileset"
1015                 (string :tag "Name" :value "")
1016                 (repeat :tag "Data"
1017                         (choice
1018                          :tag "Type" :value nil
1019                          (list :tag "Pattern"
1020                                :value (:pattern "~/"  "^.+\\.suffix$")
1021                                (const :format "" :value :pattern)
1022                                (directory :tag "Dir")
1023                                (regexp :tag "Pattern"))
1024                          (cons :tag "Files"
1025                                :value (:files)
1026                                (const :format "" :value :files)
1027                                (repeat :tag "Files" file))
1028                          (list :tag "Single File"
1029                                :value (:file "~/")
1030                                (const :format "" :value :file)
1031                                (file :tag "File"))
1032                          (list :tag "Inclusion group"
1033                                :value (:ingroup "~/")
1034                                (const :format "" :value :ingroup)
1035                                (file :tag "File" :value "~/"))
1036                          (list :tag "Directory Tree"
1037                                :value (:tree "~/"  "^.+\\.suffix$")
1038                                (const :format "" :value :tree)
1039                                (directory :tag "Dir")
1040                                (regexp :tag "Pattern"))
1041                          (list :tag "Filter directories"
1042                                :value (:filter-dirs-flag)
1043                                (const :format "" :value :filter-dirs-flag)
1044                                (boolean :tag "Boolean" :value nil))
1045                          (list :tag "Scanning depth"
1046                                :value (:tree-max-level 3)
1047                                (const :format "" :value :tree-max-level)
1048                                (integer :tag "Integer"))
1049                          (list :tag "Verbosity"
1050                                :value (:verbosity 1)
1051                                (const :format "" :value :verbosity)
1052                                (integer :tag "Integer"))
1053                          (list :tag "Conceal fileset (Flag)"
1054                                :value (:dormant-flag)
1055                                (const :format "" :value :dormant-flag)
1056                                (boolean :tag "Boolean"))
1057                          (list :tag "Conceal fileset (Function)"
1058                                :value (:dormant-p)
1059                                (const :format "" :value :dormant-p)
1060                                (function :tag "Function"))
1061                          (list :tag "Save function"
1062                                :value (:save)
1063                                (const :format "" :value :save)
1064                                (function :tag "Function"))
1065                          (list :tag "Open function"
1066                                :value (:open)
1067                                (const :format "" :value :open)
1068                                (function :tag "Function")))))))
1069 (put 'filesets-data 'risky-local-variable t)
1070
1071
1072 (defcustom filesets-query-user-limit 15
1073   "Query the user before opening a fileset with that many files."
1074   :set (function filesets-set-default)
1075   :type 'integer
1076   :group 'filesets)
1077 \f
1078 ;;; Emacs compatibility
1079 (eval-and-compile
1080   (if (featurep 'xemacs)
1081       (fset 'filesets-error 'error)
1082
1083     (require 'easymenu)
1084
1085     (defun filesets-error (_class &rest args)
1086       "`error' wrapper."
1087       (error "%s" (mapconcat 'identity args " ")))
1088
1089     ))
1090
1091 (defun filesets-filter-dir-names (lst &optional negative)
1092   "Remove non-directory names from a list of strings.
1093 If NEGATIVE is non-nil, remove all directory names."
1094   (filesets-filter-list lst
1095                         (lambda (x)
1096                           (and (not (string-match-p "^\\.+/$" x))
1097                                (if negative
1098                                    (not (string-match-p "[:/\\]$" x))
1099                                  (string-match-p "[:/\\]$" x))))))
1100
1101 (defun filesets-conditional-sort (lst &optional access-fn)
1102   "Return a sorted copy of LST, LST being a list of strings.
1103 If `filesets-sort-menu-flag' is nil, return LST itself.
1104
1105 ACCESS-FN ... function to get the string value of LST's elements."
1106   (if filesets-sort-menu-flag
1107       (let* ((fni (or access-fn
1108                       (function identity)))
1109              (fn (if filesets-sort-case-sensitive-flag
1110                      (lambda (a b)
1111                        (string< (funcall fni a)
1112                                 (funcall fni b)))
1113                    (lambda (a b)
1114                      (string< (upcase (funcall fni a))
1115                               (upcase (funcall fni b)))))))
1116         (sort (copy-sequence lst) fn))
1117     lst))
1118
1119 (defun filesets-directory-files (dir &optional
1120                                      pattern what full-flag match-dirs-flag)
1121   "Get WHAT (:files or :dirs) in DIR.
1122 If PATTERN is provided return only those entries matching this
1123 regular expression.
1124 If MATCH-DIRS-FLAG is non-nil, also match directory entries.
1125 Return full path if FULL-FLAG is non-nil."
1126   (filesets-message 2 "Filesets: scanning %S" dir)
1127   (cond
1128    ((file-exists-p dir)
1129     (let ((files nil)
1130           (dirs  nil))
1131       (dolist (this (file-name-all-completions "" dir))
1132         (cond
1133          ((string-match-p "^\\.+/$" this)
1134           nil)
1135          ((string-match-p "[:/\\]$" this)
1136           (when (or (not match-dirs-flag)
1137                     (not pattern)
1138                     (string-match-p pattern this))
1139             (filesets-message 5 "Filesets: matched dir %S with pattern %S"
1140                               this pattern)
1141             (setq dirs (cons this dirs))))
1142          (t
1143           (when (or (not pattern)
1144                     (string-match-p pattern this))
1145             (filesets-message 5 "Filesets: matched file %S with pattern %S"
1146                               this pattern)
1147             (setq files (cons (if full-flag
1148                                   (concat (file-name-as-directory dir) this)
1149                                 this)
1150                               files))))))
1151       (cond
1152        ((equal what ':dirs)
1153         (filesets-conditional-sort dirs))
1154        ((equal what ':files)
1155         (filesets-conditional-sort files))
1156        (t
1157         (append (filesets-conditional-sort files)
1158                 (filesets-conditional-sort dirs))))))
1159    (filesets-be-docile-flag
1160     (filesets-message 1 "Filesets: %S doesn't exist" dir)
1161     nil)
1162    (t
1163     (filesets-error 'error "Filesets: " dir " does not exist"))))
1164
1165 (defun filesets-quote (txt)
1166   "Return TXT in quotes."
1167   (concat "\"" txt "\""))
1168
1169 (defun filesets-get-selection ()
1170   "Get the text between mark and point -- i.e. the selection or region."
1171   (let ((m (mark))
1172         (p (point)))
1173     (if m
1174         (buffer-substring (min m p) (max m p))
1175       (filesets-error 'error "No selection."))))
1176
1177 (defun filesets-get-quoted-selection ()
1178   "Return the currently selected text in quotes."
1179   (filesets-quote (filesets-get-selection)))
1180
1181 (defun filesets-get-shortcut (n)
1182   "Create menu shortcuts based on number N."
1183   (let ((n (mod (- n 1) 51)))
1184     (cond
1185      ((not filesets-menu-shortcuts-flag)
1186       "")
1187      ((<= n 9)
1188       (concat (number-to-string n) " "))
1189      ((<= n 35)
1190       (format "%c " (+ 87 n)))
1191      ((<= n 51)
1192       (format "%c " (+ -3 n))))))
1193
1194 (defun filesets-files-equalp (a b)
1195   "Compare two filenames A and B after expansion."
1196   (equal (expand-file-name a) (expand-file-name b)))
1197
1198 (defun filesets-files-in-same-directory-p (a b)
1199   "Compare two filenames A and B after expansion."
1200   (let ((ad (file-name-directory (expand-file-name a)))
1201         (bd (file-name-directory (expand-file-name b))))
1202     (equal ad bd)))
1203
1204 (defun filesets-convert-path-list (string)
1205   "Return a path-list given as STRING as list."
1206   (if string
1207       (mapcar (lambda (x) (file-name-as-directory x))
1208               (split-string string path-separator))
1209     nil))
1210
1211 (defun filesets-which-file (master filename &optional path-list)
1212   "Search for a FILENAME relative to a MASTER file in PATH-LIST."
1213   (let ((f (concat (file-name-directory master)
1214                    filename)))
1215     (if (file-exists-p f)
1216         f
1217       (filesets-some
1218        (lambda (dir)
1219          (let ((dir (file-name-as-directory dir))
1220                (files (if (file-exists-p dir)
1221                           (filesets-directory-files dir nil ':files)
1222                         nil)))
1223            (filesets-some (lambda (file)
1224                             (if (equal filename (file-name-nondirectory file))
1225                                 (concat dir file)
1226                               nil))
1227                           files)))
1228        path-list))))
1229
1230
1231 (defun filesets-eviewer-get-props (entry)
1232   "Get ENTRY's (representing an external viewer) properties."
1233   (nth 2 entry))
1234
1235 (defun filesets-eviewer-constraint-p (entry)
1236   (let* ((props           (filesets-eviewer-get-props entry))
1237          (constraint      (assoc ':constraintp props))
1238          (constraint-flag (assoc ':constraint-flag props)))
1239     (cond
1240      (constraint
1241       (funcall (cadr constraint)))
1242      (constraint-flag
1243       (eval (cadr constraint-flag)))
1244      (t
1245       t))))
1246
1247 (defun filesets-get-external-viewer (file)
1248   "Find an external viewer for FILE."
1249   (let ((filename (file-name-nondirectory file)))
1250     (filesets-some
1251      (lambda (entry)
1252        (when (and (string-match-p (nth 0 entry) filename)
1253                   (filesets-eviewer-constraint-p entry))
1254          entry))
1255      filesets-external-viewers)))
1256
1257 (defun filesets-get-external-viewer-by-name (name)
1258   "Get the external viewer definition called NAME."
1259   (when name
1260     (filesets-some
1261      (lambda (entry)
1262        (when (and (string-equal (nth 1 entry) name)
1263                   (filesets-eviewer-constraint-p entry))
1264          entry))
1265      filesets-external-viewers)))
1266
1267 (defun filesets-filetype-property (filename event &optional entry)
1268   "Return non-nil if a file of a specific type has special flags/tags.
1269
1270 Events (corresponding tag):
1271
1272 on-open-all (:ignore-on-open-all) ... Exclude files of this when opening
1273 a fileset
1274
1275 on-grep (:ignore-on-read-text) ... Exclude files of this when running
1276 the \"Grep <<selection>>\" command
1277
1278 on-capture-output (:capture-output) ... Capture output of an external viewer
1279
1280 on-ls ... Not used
1281
1282 on-cmd ... Not used
1283
1284 on-close-all ... Not used"
1285   (let ((def (filesets-eviewer-get-props
1286               (or entry
1287                   (filesets-get-external-viewer filename)))))
1288     (filesets-alist-get def
1289                         (pcase event
1290                           (`on-open-all       ':ignore-on-open-all)
1291                           (`on-grep           ':ignore-on-read-text)
1292                           (`on-cmd nil)
1293                           (`on-close-all nil))
1294                         nil t)))
1295
1296 (defun filesets-filetype-get-prop (property filename &optional entry)
1297   "Return PROPERTY for filename -- use ENTRY if provided."
1298   (let ((def (filesets-eviewer-get-props
1299               (or entry
1300                   (filesets-get-external-viewer filename)))))
1301     (when def
1302       (filesets-alist-get def property nil t))))
1303
1304 (defun filesets-reset-filename-on-change ()
1305   "Reset a buffer's filename if the buffer is being modified."
1306   (when filesets-output-buffer-flag
1307     (set-visited-file-name nil t)))
1308
1309 (defun filesets-spawn-external-viewer (file &optional ev-entry)
1310   "Start an external viewer for FILE.
1311 Use the viewer defined in EV-ENTRY (a valid element of
1312 `filesets-external-viewers') if provided."
1313   (let* ((file     (expand-file-name file))
1314          (entry    (or ev-entry
1315                        (filesets-get-external-viewer file))))
1316     (if entry
1317         (let* ((vwr  (cadr entry))
1318                (co-flag (filesets-filetype-get-prop ':capture-output file entry))
1319                (oh   (filesets-filetype-get-prop ':open-hook file entry))
1320                (args (let ((fmt (filesets-filetype-get-prop ':args file entry)))
1321                        (if fmt
1322                            (let ((rv ""))
1323                              (dolist (this fmt rv)
1324                                (setq rv (concat rv
1325                                                 (cond
1326                                                  ((stringp this)
1327                                                   (format this file))
1328                                                  ((and (symbolp this)
1329                                                        (fboundp this))
1330                                                   (format "%S" (funcall this)))
1331                                                  (t
1332                                                   (format "%S" this)))))))
1333                          (format "%S" file))))
1334                (output
1335                 (cond
1336                  ((and (functionp vwr) co-flag)
1337                   (funcall vwr file))
1338                  ((functionp vwr)
1339                   (funcall vwr file)
1340                   nil)
1341                  (co-flag
1342                   (shell-command-to-string (format "%s %s" vwr args)))
1343                  (t
1344                   (shell-command (format "%s %s&" vwr args))
1345                   nil))))
1346           (if co-flag
1347               (progn
1348                 (switch-to-buffer (format "Filesets: %s %s" vwr file))
1349                 (insert output)
1350                 (make-local-variable 'filesets-output-buffer-flag)
1351                 (setq filesets-output-buffer-flag t)
1352                 (set-visited-file-name file t)
1353                 (when oh
1354                   (run-hooks 'oh))
1355                 (set-buffer-modified-p nil)
1356                 (setq buffer-read-only t)
1357                 (goto-char (point-min)))
1358             (when oh
1359               (run-hooks 'oh))))
1360       (filesets-error 'error
1361                       "Filesets: general error when spawning external viewer"))))
1362
1363 (defun filesets-find-file (file)
1364   "Call `find-file' after a possible delay (see `filesets-find-file-delay').
1365 If `filesets-be-docile-flag' is true, a file, which isn't readable, will
1366 not be opened."
1367 ;  (sleep-for filesets-find-file-delay)
1368   (when (or (file-readable-p file)
1369             (not filesets-be-docile-flag))
1370     (sit-for filesets-find-file-delay)
1371     (find-file file)))
1372
1373 (defun filesets-find-or-display-file (&optional file viewer)
1374   "Visit FILE using an external VIEWER or open it in an Emacs buffer."
1375   (interactive)
1376   (let* ((file (or file
1377                    (read-file-name "Find file: " nil nil viewer)))
1378          (external-viewer-def (or
1379                                (filesets-get-external-viewer-by-name viewer)
1380                                (filesets-get-external-viewer file))))
1381     (filesets-message 3 "Filesets: view %S using %s" file external-viewer-def)
1382     (if external-viewer-def
1383         (filesets-spawn-external-viewer file external-viewer-def)
1384       (filesets-find-file file))))
1385
1386 (defun filesets-find-file-using ()
1387   "Select a viewer and call `filesets-find-or-display-file'."
1388   (interactive)
1389   (let* ((lst (mapcar (lambda (this)
1390                         (let ((a (cadr this)))
1391                           (list (format "%s" a) a)))
1392                       filesets-external-viewers))
1393          (viewer (completing-read "Using viewer: " lst nil t)))
1394     (when viewer
1395       (filesets-find-or-display-file nil (cadr (assoc viewer lst))))))
1396
1397 (defun filesets-browser-name ()
1398   "Get the directory browser's name as defined in `filesets-browse-dir-function'."
1399   (cond
1400    ((listp filesets-browse-dir-function)
1401     (car filesets-browse-dir-function))
1402    (t
1403     filesets-browse-dir-function)))
1404
1405 (defun filesets-browse-dir (dir)
1406   "Browse DIR using `filesets-browse-dir-function'."
1407   (if (functionp filesets-browse-dir-function)
1408       (funcall filesets-browse-dir-function dir)
1409     (let ((name (car filesets-browse-dir-function))
1410           (args (format (cadr filesets-browse-dir-function) (expand-file-name dir))))
1411       (with-temp-buffer
1412         (start-process (concat "Filesets:" name)
1413                        "*Filesets external directory browser*"
1414                        name args)))))
1415
1416 (defun filesets-get-fileset-name (something)
1417   "Get SOMETHING's name (Don't ask)."
1418   (cond
1419    ((listp something)
1420     (car something))
1421    (t
1422     something)))
1423
1424 (defun filesets-data-get-name (entry)
1425   "Access to `filesets-data'.  Get the ENTRY's name."
1426   (car entry))
1427
1428 (defun filesets-data-get-data (entry)
1429   "Access to `filesets-data'.  Get the ENTRY's data section."
1430   (cdr entry))
1431
1432 (defun filesets-alist-get (alist key &optional default carp)
1433   "Get KEY's value in the association list ALIST.
1434 Return DEFAULT if not found.  Return (car VALUE) if CARP is non-nil."
1435   (let ((elt (assoc key alist)))
1436     (cond
1437       (elt
1438        (if carp
1439            (cadr elt)
1440          (cdr elt)))
1441       (default default)
1442       (t nil))))
1443
1444 (defun filesets-data-get (entry key &optional default carp)
1445   "Extract the value for KEY in the data part of fileset ENTRY.
1446 Return DEFAULT if not found.  Return (car VALUE) if CARP is non-nil."
1447   (filesets-alist-get (filesets-data-get-data entry) key default carp))
1448
1449 (defun filesets-data-set (entry key value)
1450   "Set the VALUE for KEY in the data part of fileset ENTRY."
1451   (let* ((alist (filesets-data-get-data entry))
1452          (elt (assoc key alist)))
1453     (if elt
1454         (setcdr elt value)
1455       (setcdr entry (cons (cons key value) alist)))))
1456
1457 (defun filesets-entry-mode (entry)
1458   "Return fileset ENTRY's mode: :files, :file, :tree, :pattern, or :ingroup.
1459 See `filesets-data'."
1460   (let ((data (filesets-data-get-data entry)))
1461     (filesets-some
1462      (lambda (x)
1463        (if (assoc x data)
1464            x))
1465      '(:files :tree :pattern :ingroup :file))))
1466
1467 (defun filesets-entry-get-open-fn (fileset-name &optional fileset-entry)
1468   "Get the open-function for FILESET-NAME.
1469 Use FILESET-ENTRY for finding the open function, if provided."
1470   (filesets-data-get (or fileset-entry
1471                          (filesets-get-fileset-from-name fileset-name))
1472                      ':open filesets-open-file-function t))
1473
1474 (defun filesets-entry-get-save-fn (fileset-name &optional fileset-entry)
1475   "Get the save-function for FILESET-NAME.
1476 Use FILESET-ENTRY for finding the save function, if provided."
1477   (filesets-data-get (or fileset-entry
1478                          (filesets-get-fileset-from-name fileset-name))
1479                      ':save filesets-save-buffer-function t))
1480
1481 (defun filesets-entry-get-files (entry)
1482   "Get the file list for fileset ENTRY."
1483   (filesets-data-get entry ':files))
1484
1485 (defun filesets-entry-set-files (entry data &optional anyways)
1486   "Set the file list for fileset ENTRY."
1487   (let ((files (filesets-entry-get-files entry)))
1488     (if (or anyways files)
1489         (filesets-data-set entry ':files data))))
1490
1491 (defun filesets-entry-get-verbosity (entry)
1492   "Get verbosity level for fileset ENTRY."
1493   (filesets-data-get entry ':verbosity 1 t))
1494
1495 (defun filesets-entry-get-file (entry)
1496   "Get the single file for fileset ENTRY."
1497   (filesets-data-get entry ':file nil t))
1498
1499 (defun filesets-entry-get-pattern (entry)
1500   "Get the base directory + file pattern for fileset ENTRY."
1501 ;  (filesets-data-get entry ':pattern nil t))
1502   (filesets-data-get entry ':pattern))
1503
1504 (defun filesets-entry-get-pattern--pattern (list)
1505   "Get the file pattern for LIST."
1506   (if (= (length list) 1) ;; for compatibility with filesets < v1.5.5
1507       (file-name-nondirectory (car list))
1508     (cadr list)))
1509
1510 (defun filesets-entry-get-pattern--dir (list)
1511   "Get a file pattern's base directory for LIST."
1512   (if (= (length list) 1) ;; for compatibility with filesets < v1.5.5
1513       (file-name-directory (car list))
1514     (car list)))
1515
1516 (defun filesets-entry-get-tree (entry)
1517   "Get the tree pattern for fileset ENTRY."
1518   (filesets-data-get entry ':tree))
1519
1520 (defun filesets-entry-get-dormant-flag (entry)
1521   "Get dormant flag for fileset ENTRY."
1522   (let ((fn (filesets-data-get entry ':dormant-p nil t)))
1523     (if fn
1524         (funcall fn)
1525       (filesets-data-get entry ':dormant-flag nil t))))
1526
1527 (defun filesets-entry-get-filter-dirs-flag (entry)
1528   "Get filter-dirs-flag for fileset ENTRY."
1529   (filesets-data-get entry ':filter-dirs-flag nil t))
1530
1531 (defun filesets-entry-get-tree-max-level (entry)
1532   "Get maximal tree scanning depth for fileset ENTRY."
1533   (filesets-data-get entry ':tree-max-level nil t))
1534
1535 (defun filesets-entry-get-master (entry)
1536   "Get the base file for fileset ENTRY."
1537   (filesets-data-get entry ':ingroup nil t))
1538
1539 (defun filesets-file-open (open-function file-name &optional fileset-name)
1540   "Open FILE-NAME using OPEN-FUNCTION.
1541 If OPEN-FUNCTION is nil, its value will be deduced from FILESET-NAME."
1542   (let ((open-function (or open-function
1543                            (filesets-entry-get-open-fn fileset-name))))
1544     (if (file-readable-p file-name)
1545         (funcall open-function file-name)
1546       (message "Filesets: Couldn't open `%s'" file-name))))
1547
1548 (defun filesets-file-close (save-function buffer)
1549   "Close BUFFER.
1550 First, save the buffer's contents using SAVE-FUNCTION.  Then, kill buffer
1551 if `buffer-modified-p' returns nil.
1552
1553 SAVE-FUNCTION takes no argument, but works on the current buffer."
1554   (with-current-buffer buffer
1555     (if (buffer-modified-p)
1556         (funcall save-function))
1557     (if (not (buffer-modified-p))
1558         (kill-buffer buffer))))
1559
1560 (defun filesets-get-fileset-from-name (name &optional mode)
1561   "Get fileset definition for NAME."
1562   (pcase mode
1563     ((or `:ingroup `:tree) name)
1564     (_ (assoc name filesets-data))))
1565
1566
1567 ;;; commands
1568 (defun filesets-cmd-get-def (cmd-name)
1569   "Get `filesets-commands' entry for CMD-NAME."
1570   (assoc cmd-name filesets-commands))
1571
1572 (defun filesets-cmd-get-args (cmd-name)
1573   (let ((args (let ((def (filesets-cmd-get-def cmd-name)))
1574                 (nth 2 def)))
1575         (rv nil))
1576     (dolist (this args rv)
1577       (cond
1578        ((and (symbolp this) (fboundp this))
1579         (let ((x (funcall this)))
1580           (setq rv (append rv (if (listp x) x (list x))))))
1581        (t
1582         (setq rv (append rv (list this))))))))
1583
1584 (defun filesets-cmd-get-fn (cmd-name)
1585   (let ((def (filesets-cmd-get-def cmd-name)))
1586     (nth 1 def)))
1587
1588 (defun filesets-cmd-show-result (cmd output)
1589   "Show OUTPUT of CMD (a shell command)."
1590   (pop-to-buffer "*Filesets: Shell Command Output*")
1591   (with-no-warnings
1592    (end-of-buffer))
1593   (insert "*** ")
1594   (insert cmd)
1595   (newline)
1596   (insert output)
1597   (newline))
1598
1599 (defun filesets-run-cmd--repl-fn (arg &optional format-fn)
1600   "Helper function for `filesets-run-cmd'.  Apply FORMAT-FN to arg.
1601 Replace <file-name> or <<file-name>> with filename."
1602   (funcall format-fn (cond
1603                       ((equal arg "<file-name>")
1604                        (buffer-file-name))
1605                       ((equal arg "<<file-name>>")
1606                        (shell-quote-argument (buffer-file-name)))
1607                       (t
1608                        arg))))
1609
1610 (defun filesets-run-cmd (&optional cmd-name fileset mode)
1611   "Run CMD-NAME (see `filesets-commands') on FILESET."
1612   (interactive)
1613   (let* ((cmd-name (or cmd-name
1614                        (completing-read "Select command: " filesets-commands
1615                                         nil t)))
1616          (name  (or fileset
1617                     (completing-read "Select fileset: " filesets-data nil t))))
1618     (when (and cmd-name name)
1619       (let* ((event (if (equal cmd-name "Grep <<selection>>")
1620                        'on-grep
1621                       'on-cmd))
1622              (files (if (and fileset
1623                              (or (equal mode ':ingroup)
1624                                  (equal mode ':tree)))
1625                         (filesets-get-filelist fileset mode event)
1626                      (filesets-get-filelist
1627                       (filesets-get-fileset-from-name name)
1628                       mode event))))
1629         (when files
1630           (let ((fn   (filesets-cmd-get-fn cmd-name))
1631                 (args (filesets-cmd-get-args cmd-name)))
1632             (if (memq fn '(multi-isearch-files multi-isearch-files-regexp))
1633                 (apply fn args)
1634               (dolist (this files nil)
1635                 (save-excursion
1636                   (save-restriction
1637                     (let ((buffer (filesets-find-file this)))
1638                       (when buffer
1639                         (goto-char (point-min))
1640                         (progn
1641                           (cond
1642                            ((stringp fn)
1643                             (let* ((args
1644                                     (let ((txt ""))
1645                                       (dolist (this args txt)
1646                                         (setq txt
1647                                               (concat txt
1648                                                       (filesets-run-cmd--repl-fn
1649                                                        this
1650                                                        (lambda (this)
1651                                                          (if (equal txt "") "" " ")
1652                                                          (format "%s" this))))))))
1653                                    (cmd (concat fn " " args)))
1654                               (filesets-cmd-show-result
1655                                cmd (shell-command-to-string cmd))))
1656                            ((symbolp fn)
1657                             (let ((args
1658                                    (let ((argl nil))
1659                                      (dolist (this args argl)
1660                                        (setq argl
1661                                              (append argl
1662                                                      (filesets-run-cmd--repl-fn
1663                                                       this
1664                                                       'list)))))))
1665                               (apply fn args)))))))))))))))))
1666
1667 (defun filesets-get-cmd-menu ()
1668   "Create filesets command menu."
1669   `("+ Commands"
1670     . ,(mapcar (lambda (this)
1671                  (let ((name (car this)))
1672                    `[,name (filesets-run-cmd ,name)]))
1673                filesets-commands)))
1674
1675
1676 ;;; sample commands
1677 (defun filesets-cmd-query-replace-getargs ()
1678   "Get arguments for `query-replace' and `query-replace-regexp'."
1679   (let ((common (query-replace-read-args "Filesets query replace" nil t)))
1680     (list (nth 0 common) (nth 1 common) t nil (nth 2 common) nil
1681           multi-query-replace-map)))
1682
1683 (defun filesets-cmd-query-replace-regexp-getargs ()
1684   "Get arguments for `query-replace' and `query-replace-regexp'."
1685   (let ((common (query-replace-read-args "Filesets query replace" t t)))
1686     (list (nth 0 common) (nth 1 common) t t (nth 2 common) nil
1687           multi-query-replace-map)))
1688
1689 (defun filesets-cmd-isearch-getargs ()
1690   "Get arguments for `multi-isearch-files' and `multi-isearch-files-regexp'."
1691   (and (boundp 'files) (list files)))
1692
1693 (defun filesets-cmd-shell-command-getargs ()
1694   "Get arguments for `filesets-cmd-shell-command'."
1695   (let* ((arg (read-string "Shell command (%s = file): "
1696                                    "%s"
1697                                    'shell-command-history)))
1698     arg))
1699
1700 (defun filesets-cmd-shell-command (txt)
1701   "Wrapper function for `shell-command'."
1702   (let ((ok (if (buffer-modified-p)
1703                 (let ((ok (y-or-n-p "Save buffer? ")))
1704                   (when ok
1705                     (save-buffer))
1706                   ok)
1707               t)))
1708     (when ok
1709       (let ((cmd (format txt (shell-quote-argument (buffer-file-name)))))
1710         (message "Filesets: %s" cmd)
1711         (filesets-cmd-show-result cmd
1712                                   (shell-command-to-string cmd))))))
1713
1714
1715 ;;; body
1716 (defun filesets-get-filelist (entry &optional mode event)
1717   "Get all files for fileset ENTRY.
1718 Assume MODE (see `filesets-entry-mode'), if provided."
1719   (let* ((mode (or mode
1720                    (filesets-entry-mode entry)))
1721          (fl (pcase mode
1722                (:files
1723                 (filesets-entry-get-files entry))
1724                (:file
1725                 (list (filesets-entry-get-file entry)))
1726                (:ingroup
1727                 (let ((entry (expand-file-name
1728                               (if (stringp entry)
1729                                   entry
1730                                 (filesets-entry-get-master entry)))))
1731                   (cons entry (filesets-ingroup-cache-get entry))))
1732                (:tree
1733                 (let ((dir  (nth 0 entry))
1734                       (patt (nth 1 entry)))
1735                   (filesets-directory-files dir patt ':files t)))
1736                (:pattern
1737                 (let ((dirpatt (filesets-entry-get-pattern entry)))
1738                   (if dirpatt
1739                       (let ((dir (filesets-entry-get-pattern--dir dirpatt))
1740                             (patt (filesets-entry-get-pattern--pattern dirpatt)))
1741                         ;;(filesets-message 3 "Filesets: scanning %s" dirpatt)
1742                         (filesets-directory-files dir patt ':files t))
1743                     ;; (message "Filesets: malformed entry: %s" entry)))))))
1744                     (filesets-error 'error "Filesets: malformed entry: "
1745                                     entry)))))))
1746     (filesets-filter-list fl
1747                           (lambda (file)
1748                             (not (filesets-filetype-property file event))))))
1749
1750 (defun filesets-open (&optional mode name lookup-name)
1751   "Open the fileset called NAME.
1752 Use LOOKUP-NAME for searching additional data if provided."
1753   (interactive)
1754   (let* ((name (or name
1755                    (completing-read "Open fileset: " filesets-data nil t)))
1756          (fileset (filesets-get-fileset-from-name name mode))
1757          (lookup-fs (if lookup-name
1758                         (filesets-get-fileset-from-name lookup-name)
1759                       fileset))
1760          (mode (or mode (filesets-entry-mode lookup-fs))))
1761     (if fileset
1762         (let* ((files         (filesets-get-filelist fileset mode 'on-open-all))
1763                (n             (length files))
1764                (open-function (filesets-entry-get-open-fn nil lookup-fs)))
1765           (if (or (<= n filesets-query-user-limit)
1766                   (y-or-n-p (format "Filesets: Open all %d files in %s? "
1767                                     n name)))
1768               (dolist (this files nil)
1769                 (filesets-file-open open-function this))
1770             (message "Filesets: canceled")))
1771       (filesets-error 'error "Filesets: Unknown fileset: " name))))
1772
1773 (defun filesets-close (&optional mode name lookup-name)
1774   "Close all buffers belonging to the fileset called NAME.
1775 Use LOOKUP-NAME for deducing the save-function, if provided."
1776   (interactive)
1777   (let* ((name (or name
1778                    (completing-read "Close fileset: " filesets-data nil t)))
1779          (fileset (filesets-get-fileset-from-name name mode))
1780          (lookup-fs (if lookup-name
1781                         (filesets-get-fileset-from-name lookup-name)
1782                       fileset))
1783          (mode (or mode (filesets-entry-mode lookup-fs))))
1784     (if fileset
1785         (let ((files         (filesets-get-filelist fileset mode 'on-close-all))
1786               (save-function (filesets-entry-get-save-fn nil lookup-fs)))
1787           (dolist (file-name files nil)
1788             (let* ((buffer (get-file-buffer file-name)))
1789               (if buffer
1790                   (filesets-file-close save-function buffer)))))
1791 ;      (message "Filesets: Unknown fileset: `%s'" name))))
1792       (filesets-error 'error "Filesets: Unknown fileset: " name))))
1793
1794 (defun filesets-add-buffer (&optional name buffer)
1795   "Add BUFFER (or current buffer) to the fileset called NAME.
1796 User will be queried, if no fileset name is provided."
1797   (interactive)
1798   (let* ((buffer (or buffer
1799                      (current-buffer)))
1800          (name   (or name
1801                      (completing-read
1802                       (format "Add '%s' to fileset: " buffer)
1803                       filesets-data nil)))
1804          (entry  (or (assoc name filesets-data)
1805                      (when (y-or-n-p
1806                             (format "Fileset %s does not exist. Create it? "
1807                                     name))
1808                        (progn
1809       (add-to-list 'filesets-data (list name '(:files)))
1810       (message
1811        "Fileset %s created.  Call `M-x filesets-save-config' to save."
1812        name)
1813       (car filesets-data))))))
1814     (if entry
1815         (let* ((files  (filesets-entry-get-files entry))
1816                (this   (buffer-file-name buffer))
1817                (inlist (filesets-member this files
1818                                         :test 'filesets-files-equalp)))
1819           (cond
1820            (inlist
1821             (message "Filesets: '%s' is already in '%s'" this name))
1822            ((and (equal (filesets-entry-mode entry) ':files)
1823                  this)
1824             (filesets-entry-set-files entry (cons this files) t)
1825             (filesets-set-config name 'filesets-data filesets-data))
1826            (t
1827             (message "Filesets: Can't add '%s' to fileset '%s'" this name)))))))
1828
1829 (defun filesets-remove-buffer (&optional name buffer)
1830   "Remove BUFFER (or current buffer) to fileset NAME.
1831 User will be queried, if no fileset name is provided."
1832   (interactive)
1833   (let* ((buffer (or buffer
1834                      (current-buffer)))
1835          (name   (or name
1836                      (completing-read
1837                       (format "Remove '%s' from fileset: " buffer)
1838                       filesets-data nil t)))
1839                  (entry (assoc name filesets-data)))
1840     (if entry
1841         (let* ((files  (filesets-entry-get-files entry))
1842                (this   (buffer-file-name buffer))
1843                (inlist (filesets-member this files
1844                                         :test 'filesets-files-equalp)))
1845           ;;(message "%s %s %s" files this inlist)
1846           (if (and files this inlist)
1847               (let ((new (list (cons ':files (delete (car inlist) files)))))
1848                 (setcdr entry new)
1849                 (filesets-set-config name 'filesets-data filesets-data))
1850             (message "Filesets: Can't remove '%s' from fileset '%s'"
1851                      this
1852                      name))))))
1853
1854 (defun filesets-convert-patterns (name)
1855   "Change fileset NAME's mode from :pattern to :files."
1856   (interactive)
1857   (let ((entry (assoc name filesets-data)))
1858     (if entry
1859         (let ((pattern  (filesets-entry-get-pattern entry))
1860               (patfiles (filesets-get-filelist entry ':pattern)))
1861           (if pattern
1862               (progn
1863                 (filesets-entry-set-files entry patfiles t)
1864                 (filesets-set-config name 'filesets-data filesets-data)))))))
1865
1866 (defun filesets-edit ()
1867   "Customize `filesets-data'."
1868   (interactive)
1869   (customize-variable 'filesets-data))
1870
1871 (defun filesets-customize ()
1872   "Customize the filesets group."
1873   (interactive)
1874   (customize-group 'filesets))
1875
1876 (defun filesets-info ()
1877   "Display filesets's version information."
1878   (interactive)
1879   (if (y-or-n-p (format "Filesets v%s: visit homepage? " filesets-version))
1880       (filesets-goto-homepage)))
1881
1882 (defun filesets-goto-homepage ()
1883   "Show filesets's homepage."
1884   (interactive)
1885   (browse-url filesets-homepage))
1886
1887 (defun filesets-remake-shortcut (count submenu)
1888   "Remake a submenu's shortcut when wrapping long menus."
1889   (let* ((name (concat (filesets-get-shortcut count)
1890                        (substring (elt submenu 0) 2))))
1891     (if (listp submenu)
1892         (cons name (cdr submenu))
1893       (apply 'vector (list name (cdr (append submenu nil)))))))
1894 ;      (vconcat `[,name] (subseq submenu 1)))))
1895
1896 (defun filesets-wrap-submenu (submenu-body)
1897   "Split long submenus."
1898   (let ((bl (length submenu-body)))
1899     (if (or (= filesets-max-submenu-length 0)
1900             (<= bl filesets-max-submenu-length))
1901         submenu-body
1902       (let* ((result  nil)
1903              (factor (ceiling (/ (float bl)
1904                                  filesets-max-submenu-length))))
1905         (cl-do ((data  submenu-body (cdr data))
1906                 (n     1            (+ n 1))
1907                 (count 0            (+ count factor)))
1908             ((or (> count bl)
1909                  (null data)))
1910           ;; (let ((sl (subseq submenu-body count
1911           (let ((sl (filesets-sublist submenu-body count
1912                                       (let ((x (+ count factor)))
1913                                         (if (>= bl x)
1914                                             x
1915                                           nil)))))
1916             (when sl
1917               (setq result
1918                     (append
1919                      result
1920                      (if (= (length sl) 1)
1921                          (if filesets-menu-shortcuts-flag
1922                              (list (filesets-remake-shortcut n (car sl)))
1923                            sl)
1924                        `((,(concat
1925                             (filesets-get-shortcut n)
1926                             (let ((rv ""))
1927                               (cl-do ((x sl (cdr x)))
1928                                   ((null x))
1929                                 (let ((y (concat (elt (car x) 0)
1930                                                  (if (null (cdr x))
1931                                                      ""
1932                                                    ", "))))
1933                                   (setq rv
1934                                         (concat
1935                                          rv
1936                                          (if filesets-menu-shortcuts-flag
1937                                              (substring y 2)
1938                                            y)))))
1939                               (if (> (length rv)
1940                                      filesets-max-entry-length)
1941                                   (concat
1942                                    (substring rv 0 filesets-max-entry-length)
1943                                    " ...")
1944                                 rv)))
1945                           ,@sl))))))))
1946         result))))
1947
1948 (defun filesets-get-menu-epilog (something &optional
1949                                            mode lookup-name rebuild-flag)
1950   "Get submenu epilog for SOMETHING (usually a fileset).
1951 If mode is :tree or :ingroup, SOMETHING is some weird construct and
1952 LOOKUP-NAME is used as lookup name for retrieving fileset specific settings."
1953   (pcase mode
1954     (:tree
1955      `("---"
1956        ["Close all files" (filesets-close ',mode ',something ',lookup-name)]
1957        ["Run Command"     (filesets-run-cmd nil ',something ',mode)]
1958        [,(format "Browse with `%s'" (filesets-browser-name))
1959         (filesets-browse-dir ',(car something))]
1960        ,@(when rebuild-flag
1961            `(["Rebuild this submenu"
1962               (filesets-rebuild-this-submenu ',lookup-name)]))))
1963     (:ingroup
1964      `("---"
1965        ["Close all files" (filesets-close ',mode ',something ',lookup-name)]
1966        ["Run Command"     (filesets-run-cmd nil ',something ',mode)]
1967        ,@(when rebuild-flag
1968            `(["Rebuild this submenu"
1969               (filesets-rebuild-this-submenu ',lookup-name)]))))
1970     (:pattern
1971      `("---"
1972        ["Close all files" (filesets-close ',mode ',something)]
1973        ["Run Command"     (filesets-run-cmd nil ',something ',mode)]
1974        [,(format "Browse with `%s'" (filesets-browser-name))
1975         ,(list 'filesets-browse-dir
1976                (filesets-entry-get-pattern--dir
1977                 (filesets-entry-get-pattern
1978                  (filesets-get-fileset-from-name something ':pattern))))]
1979 ;       [,(concat (if filesets-menu-shortcuts-flag
1980 ;                    (concat "Con" filesets-menu-shortcuts-marker "vert")
1981 ;                    "Convert")
1982 ;                " :pattern to :files")
1983 ;       ,(list (function filesets-convert-patterns) something)]
1984        ,@(when rebuild-flag
1985            `(["Rebuild this submenu"
1986               (filesets-rebuild-this-submenu ',lookup-name)]))))
1987     (:files
1988      `("---"
1989        [,(concat "Close all files") (filesets-close ',mode ',something)]
1990        ["Run Command"               (filesets-run-cmd nil ',something ',mode)]
1991        ["Add current buffer"
1992         (filesets-add-buffer ',something (current-buffer))]
1993        ["Remove current buffer"
1994         (filesets-remove-buffer ',something (current-buffer))]
1995        ,@(when rebuild-flag
1996            `(["Rebuild this submenu"
1997               (filesets-rebuild-this-submenu ',lookup-name)]))))
1998     (_
1999      (filesets-error 'error "Filesets: malformed definition of " something))))
2000
2001 (defun filesets-ingroup-get-data (master pos &optional fun)
2002   "Access to `filesets-ingroup-patterns'.  Extract data section."
2003   (let ((masterfile (file-name-nondirectory master))
2004         (fn (or fun (lambda (a b)
2005                       (and (stringp a)
2006                            (stringp b)
2007                            (string-match-p a b))))))
2008     (filesets-some (lambda (x)
2009                      (if (funcall fn (car x) masterfile)
2010                          (nth pos x)
2011                        nil))
2012                    filesets-ingroup-patterns)))
2013
2014 (defun filesets-ingroup-get-pattern (master)
2015   "Access to `filesets-ingroup-patterns'.  Extract patterns."
2016   (filesets-ingroup-get-data master 2))
2017
2018 (defun filesets-ingroup-get-remdupl-p (master)
2019   "Access to `filesets-ingroup-patterns'.  Extract remove-duplicates-flag."
2020   (filesets-ingroup-get-data master 1))
2021
2022 (defun filesets-ingroup-collect-finder (patt case-sensitivep)
2023   "Helper function for `filesets-ingroup-collect'.  Find pattern PATT."
2024   (let ((cfs case-fold-search)
2025         (rv  (progn
2026                (setq case-fold-search (not case-sensitivep))
2027                (re-search-forward patt nil t))))
2028     (setq case-fold-search cfs)
2029     rv))
2030
2031 (defun filesets-ingroup-cache-get (master)
2032   "Access to `filesets-ingroup-cache'."
2033   (lax-plist-get filesets-ingroup-cache master))
2034
2035 (defun filesets-ingroup-cache-put (master file)
2036   "Access to `filesets-ingroup-cache'."
2037   (let* ((emaster (expand-file-name master))
2038          (this    (if file
2039                       (cons file (filesets-ingroup-cache-get emaster))
2040                     nil)))
2041     (setq filesets-ingroup-cache
2042           (lax-plist-put filesets-ingroup-cache emaster this))))
2043
2044 (defun filesets-ingroup-collect-files (fs &optional remdupl-flag master depth)
2045   "Helper function for `filesets-ingroup-collect'.  Collect file names."
2046   (let* ((master       (or master
2047                            (filesets-entry-get-master fs)))
2048          (remdupl-flag (or remdupl-flag
2049                            (filesets-ingroup-get-remdupl-p master))))
2050     (filesets-ingroup-cache-put master nil)
2051     (filesets-message 2 "Filesets: parsing %S" master)
2052     (let ((cmdpatts (filesets-ingroup-get-pattern master))
2053           (count    0)
2054           (rv       nil))
2055       (if cmdpatts
2056           (dolist (this-def cmdpatts rv)
2057             (let* ((this-patt (filesets-alist-get this-def ':pattern nil t))
2058                    (this-name (filesets-alist-get this-def ':name "" t))
2059                    (this-pp   (filesets-alist-get this-def ':preprocess nil t))
2060                    (this-mn   (filesets-alist-get this-def ':match-number 1 t))
2061                    (this-sd   (or depth
2062                                   (filesets-alist-get this-def ':scan-depth 0 t)))
2063                    (this-csp  (filesets-alist-get this-def ':case-sensitive nil t))
2064                    (this-fn   (filesets-alist-get
2065                                this-def ':get-file-name 'filesets-which-file t))
2066                    (this-stubp (filesets-alist-get this-def ':stubp nil t))
2067                    (this-stub-flag (filesets-alist-get this-def ':stub-flag nil t))
2068                    (flist     nil)
2069                    (lst      nil))
2070               (cond
2071                ((not this-patt)
2072                 (filesets-error 'error "Filesets: malformed :ingroup definition "
2073                                 this-def))
2074                ((< this-sd 0)
2075                 nil)
2076                (t
2077                 (with-temp-buffer
2078                   (insert-file-contents master)
2079                   (goto-char (point-min))
2080                   (when this-pp
2081                     (funcall this-pp))
2082                   (while (filesets-ingroup-collect-finder this-patt this-csp)
2083                     (let* ((txt (match-string this-mn))
2084                            (f   (funcall this-fn master txt)))
2085                       (when (and f
2086                                  (not (member f flist))
2087                                  (or (not remdupl-flag)
2088                                      (not (filesets-member
2089                                            f filesets-ingroup-files
2090                                            :test 'filesets-files-equalp))))
2091                         (let ((no-stub-flag
2092                                (and (not this-stub-flag)
2093                                     (if this-stubp
2094                                         (not (funcall this-stubp master f))
2095                                       t))))
2096                           (setq count (+ count 1))
2097                           (setq flist (cons f flist))
2098                           (setq filesets-ingroup-files
2099                                 (cons f filesets-ingroup-files))
2100                           (when no-stub-flag
2101                             (filesets-ingroup-cache-put master f))
2102                           (setq lst (append lst (list f))))))))
2103                 (when lst
2104                   (setq rv
2105                         (nconc rv
2106                                (mapcar (lambda (this)
2107                                          `((,this ,this-name)
2108                                            ,@(filesets-ingroup-collect-files
2109                                               fs remdupl-flag this
2110                                               (- this-sd 1))))
2111                                        lst))))))))
2112         (filesets-message 2 "Filesets: no patterns defined for %S" master)))))
2113
2114 (defun filesets-ingroup-collect-build-menu (fs flist &optional other-count)
2115   "Helper function for `filesets-ingroup-collect'.  Build the menu.
2116 FS is a fileset's name.  FLIST is a list returned by
2117 `filesets-ingroup-collect-files'."
2118   (if (null flist)
2119       nil
2120     (let ((count 0)
2121           (fsn    fs)
2122           (rv     nil))
2123       (dolist (this flist rv)
2124         (setq count (+ count 1))
2125         (let* ((def    (if (listp this) (car this) (list this "")))
2126                (files  (if (listp this) (cdr this) nil))
2127                (master (nth 0 def))
2128                (name   (nth 1 def))
2129                (nm     (concat (filesets-get-shortcut (if (or (not other-count) files)
2130                                                           count other-count))
2131                                (if (or (null name) (equal name ""))
2132                                    ""
2133                                  (format "%s: " name))
2134                                (file-name-nondirectory master))))
2135           (setq rv
2136                 (append rv
2137                         (if files
2138                             `((,nm
2139                                [,(concat "Inclusion Group: "
2140                                          (file-name-nondirectory master))
2141                                 (filesets-open ':ingroup ',master ',fsn)]
2142                                "---"
2143                                [,master (filesets-file-open nil ',master ',fsn)]
2144                                "---"
2145                                ,@(let ((count 0))
2146                                    (mapcar
2147                                     (lambda (this)
2148                                       (setq count (+ count 1))
2149                                       (let ((ff (filesets-ingroup-collect-build-menu
2150                                                  fs (list this) count)))
2151                                         (if (= (length ff) 1)
2152                                             (car ff)
2153                                           ff)))
2154                                     files))
2155                                ,@(filesets-get-menu-epilog master ':ingroup fsn)))
2156                           `([,nm (filesets-file-open nil ',master ',fsn)])))))))))
2157
2158 (defun filesets-ingroup-collect (fs remdupl-flag master)
2159   "Collect names of included files and build submenu."
2160   (filesets-ingroup-cache-put master nil)
2161   (filesets-message 2 "Filesets: parsing %S" master)
2162   (filesets-ingroup-collect-build-menu
2163    fs
2164    (filesets-ingroup-collect-files fs remdupl-flag master)))
2165
2166 (defun filesets-build-ingroup-submenu (lookup-name master)
2167   "Build a :ingroup submenu for file MASTER."
2168   (if (file-readable-p master)
2169       (let ((remdupl-flag  (filesets-ingroup-get-remdupl-p master)))
2170         (setq filesets-ingroup-files (list master))
2171         (filesets-ingroup-collect lookup-name remdupl-flag master))
2172     (if filesets-be-docile-flag
2173         (progn
2174           (message "Filesets: can't parse %s" master)
2175           nil)
2176       (filesets-error 'error "Filesets: can't parse " master))))
2177
2178 (defun filesets-build-dir-submenu-now (level depth entry lookup-name dir patt fd
2179                                              &optional rebuild-flag)
2180   "Helper function for `filesets-build-dir-submenu'."
2181   ;;(filesets-message 3 "Filesets: scanning %s" dir)
2182   (if (or (= depth 0)
2183           (< level depth))
2184       (let* ((dir       (file-name-as-directory dir))
2185              (header    `([,(concat "Tree: "
2186                                     (if (= level 0)
2187                                         dir
2188                                       (concat ".../"
2189                                               (file-name-as-directory
2190                                                (file-name-nondirectory
2191                                                 (directory-file-name dir))))))
2192                            ,(list (function filesets-open)
2193                                   ':tree
2194                                   `(quote (,dir ,patt))
2195                                   lookup-name)]
2196                           "---"))
2197              (dirlist   (filesets-directory-files dir patt nil nil fd))
2198              (subdirs   (filesets-filter-dir-names dirlist))
2199              (count     0)
2200              (dirsmenu  (mapcar
2201                          (lambda (x)
2202                            (setq count (+ count 1))
2203                            (let* ((x  (file-name-as-directory x))
2204                                   (xx (concat dir x))
2205                                   (dd (filesets-build-dir-submenu-now
2206                                        (+ level 1) depth entry
2207                                        lookup-name xx patt fd))
2208                                   (nm (concat (filesets-get-shortcut count)
2209                                               x)))
2210                              (if dd
2211                                  `(,nm ,@dd)
2212                                `[,nm ,(list 'filesets-browse-dir xx)])))
2213                          subdirs))
2214              (files     (filesets-filter-dir-names dirlist t))
2215              (filesmenu (mapcar (lambda (x)
2216                                   (setq count (+ count 1))
2217                                   `[,(concat (filesets-get-shortcut count)
2218                                              x)
2219                                     (filesets-file-open nil
2220                                                         (quote ,(concat dir x))
2221                                                         (quote ,lookup-name))])
2222                                 files)))
2223         (append header
2224                 (filesets-wrap-submenu
2225                  (append
2226                   dirsmenu
2227                   filesmenu))
2228                 (filesets-get-menu-epilog `(,dir ,patt) ':tree
2229                                           lookup-name rebuild-flag)))
2230     nil))
2231
2232 (defun filesets-build-dir-submenu (entry lookup-name dir patt)
2233   "Build a :tree submenu named LOOKUP-NAME with base directory DIR including
2234 all files matching PATT for filesets ENTRY."
2235   (let ((fd (filesets-entry-get-filter-dirs-flag entry))
2236         (depth (or (filesets-entry-get-tree-max-level entry)
2237                    filesets-tree-max-level)))
2238     (filesets-build-dir-submenu-now 0 depth entry lookup-name dir patt fd t)))
2239
2240 (defun filesets-build-submenu (count lookup-name entry)
2241   "Build submenu for the fileset ENTRY named LOOKUP-NAME.
2242 Construct a shortcut from COUNT."
2243   (let ((lookup-name (or lookup-name
2244                          (filesets-data-get-name entry))))
2245     (message "Filesets: %s" lookup-name)
2246     (let ((mode (filesets-entry-mode entry))
2247           (filesets-verbosity (filesets-entry-get-verbosity entry))
2248           (this-lookup-name (concat (filesets-get-shortcut count)
2249                                     lookup-name)))
2250       (pcase mode
2251         (:file
2252          (let* ((file (filesets-entry-get-file entry)))
2253            `[,this-lookup-name
2254              (filesets-file-open nil ',file ',lookup-name)]))
2255         (_
2256          `(,this-lookup-name
2257            ,@(pcase mode
2258                (:pattern
2259                 (let* ((files    (filesets-get-filelist entry mode 'on-ls))
2260                        (dirpatt  (filesets-entry-get-pattern entry))
2261                        (pattname (apply 'concat (cons "Pattern: " dirpatt)))
2262                        (count   0))
2263                   ;;(filesets-message 3 "Filesets: scanning %S" pattname)
2264                   `([,pattname
2265                      ,(list (function filesets-open) mode lookup-name)]
2266                     "---"
2267                     ,@(filesets-wrap-submenu
2268                        (mapcar
2269                         (lambda (x)
2270                           (setq count (+ count 1))
2271                           `[,(concat (filesets-get-shortcut count)
2272                                      (file-name-nondirectory x))
2273                             (filesets-file-open nil ',x ',lookup-name)])
2274                         files))
2275                     ,@(filesets-get-menu-epilog lookup-name mode
2276                                                 lookup-name t))))
2277                (:ingroup
2278                 (let* ((master (filesets-entry-get-master entry)))
2279                   ;;(filesets-message 3 "Filesets: parsing %S" master)
2280                   `([,(concat "Inclusion Group: "
2281                               (file-name-nondirectory master))
2282                      (filesets-open ',mode ',master ',lookup-name)]
2283                     "---"
2284                     [,master (filesets-file-open nil ',master ',lookup-name)]
2285                     "---"
2286                     ,@(filesets-wrap-submenu
2287                        (filesets-build-ingroup-submenu lookup-name master))
2288                     ,@(filesets-get-menu-epilog master mode lookup-name t))))
2289                (:tree
2290                 (let* ((dirpatt (filesets-entry-get-tree entry))
2291                        (dir     (car dirpatt))
2292                        (patt    (cadr dirpatt)))
2293                   (filesets-build-dir-submenu entry lookup-name dir patt)))
2294                (:files
2295                 (let ((files (filesets-get-filelist entry mode 'on-open-all))
2296                       (count 0))
2297                   `([,(concat "Files: " lookup-name)
2298                      (filesets-open ',mode ',lookup-name)]
2299                     "---"
2300                     ,@(filesets-wrap-submenu
2301                        (mapcar
2302                         (lambda (x)
2303                           (setq count (+ count 1))
2304                           `[,(concat (filesets-get-shortcut count)
2305                                      (file-name-nondirectory x))
2306                             (filesets-file-open nil ',x ',lookup-name)])
2307                         (filesets-conditional-sort
2308                          files
2309                          (function file-name-nondirectory))))
2310                     ,@(filesets-get-menu-epilog lookup-name mode
2311                                                 lookup-name t)))))))))))
2312
2313 (defun filesets-remove-from-ubl (&optional buffer)
2314   "BUFFER or current buffer require update of the filesets menu."
2315   (let ((b (or buffer
2316                (current-buffer))))
2317     (if (member b filesets-updated-buffers)
2318         (setq filesets-updated-buffers
2319               (delete b filesets-updated-buffers)))))
2320
2321 (defun filesets-build-menu-now (from-scratch-flag)
2322   "Update the filesets menu.
2323 Build all new if FROM-SCRATCH-FLAG is non-nil.  (To really build from the
2324 bottom up, set `filesets-submenus' to nil, first.)"
2325   (when (or from-scratch-flag
2326             filesets-has-changed-flag
2327             (not filesets-menu-cache))
2328     (setq filesets-menu-cache nil)
2329     (setq filesets-has-changed-flag nil)
2330     (setq filesets-updated-buffers nil)
2331     (setq filesets-update-cache-file-flag t)
2332     (cl-do ((data  (filesets-conditional-sort filesets-data (function car))
2333                    (cdr data))
2334             (count 1 (+ count 1)))
2335         ((null data))
2336       (let* ((this    (car data))
2337              (name    (filesets-data-get-name this))
2338              (cached  (lax-plist-get filesets-submenus name))
2339              (submenu (or cached
2340                           (filesets-build-submenu count name this))))
2341         (unless cached
2342           (setq filesets-submenus
2343                 (lax-plist-put filesets-submenus name submenu)))
2344         (unless (filesets-entry-get-dormant-flag this)
2345           (setq filesets-menu-cache
2346                 (append filesets-menu-cache (list submenu))))))
2347     (when filesets-cache-save-often-flag
2348       (filesets-menu-cache-file-save-maybe)))
2349   (let ((cb (current-buffer)))
2350     (when (not (member cb filesets-updated-buffers))
2351       (add-submenu
2352        filesets-menu-path
2353        `(,filesets-menu-name
2354          ("# Filesets"
2355           ["Edit Filesets"   filesets-edit]
2356           ["Save Filesets"   filesets-save-config]
2357           ["Save Menu Cache" filesets-menu-cache-file-save]
2358           ["Rebuild Menu"    filesets-build-menu]
2359           ["Customize"       filesets-customize]
2360           ["About"           filesets-info])
2361          ,(filesets-get-cmd-menu)
2362          "---"
2363          ,@filesets-menu-cache)
2364        filesets-menu-before
2365        filesets-menu-in-menu)
2366       (setq filesets-updated-buffers
2367             (cons cb filesets-updated-buffers))
2368       ;; This wipes out other messages in the echo area.
2369       ;; (message nil)
2370       ;;(message "Filesets updated: %s" cb)
2371       )))
2372
2373 (defun filesets-build-menu-maybe ()
2374   "Update the filesets menu."
2375   (interactive)
2376   (filesets-build-menu-now nil))
2377
2378 (defun filesets-build-menu ()
2379   "Force rebuild of the filesets menu."
2380   (interactive)
2381   ;(setq filesets-submenus nil)
2382   (filesets-reset-fileset)
2383   (filesets-build-menu-now t)
2384   (filesets-menu-cache-file-save-maybe))
2385
2386 (defun filesets-rebuild-this-submenu (fileset)
2387   "Force rebuild of FILESET submenu."
2388   (filesets-reset-fileset fileset)
2389   (filesets-build-menu-now t))
2390
2391 (defun filesets-menu-cache-file-save-maybe (&optional simply-do-it)
2392   "Write filesets' cache file.
2393 If SIMPLY-DO-IT is non-nil, the cache file will be written no matter if
2394 fileset thinks this is necessary or not."
2395   (when (and (not (equal filesets-menu-cache-file ""))
2396              (or simply-do-it
2397                  filesets-update-cache-file-flag))
2398     (when (file-exists-p filesets-menu-cache-file)
2399       (delete-file filesets-menu-cache-file))
2400     ;;(message "Filesets: saving menu cache")
2401     (with-temp-buffer
2402       (dolist (this filesets-menu-cache-contents)
2403         (if (get this 'custom-type)
2404             (progn
2405               (insert (format "(setq-default %s '%S)" this (eval this)))
2406               (when filesets-menu-ensure-use-cached
2407                 (newline)
2408                 (insert (format "(setq %s (cons '%s %s))"
2409                                 'filesets-ignore-next-set-default
2410                                 this
2411                                 'filesets-ignore-next-set-default))))
2412           (insert (format "(setq %s '%S)" this (eval this))))
2413         (newline 2))
2414       (insert (format "(setq filesets-cache-version %S)" filesets-version))
2415       (newline 2)
2416       (when filesets-cache-hostname-flag
2417         (insert (format "(setq filesets-cache-hostname %S)" (system-name)))
2418         (newline 2))
2419       (run-hooks 'filesets-cache-fill-content-hook)
2420       (write-file filesets-menu-cache-file))
2421     (setq filesets-has-changed-flag nil)
2422     (setq filesets-update-cache-file-flag nil)))
2423
2424 (defun filesets-menu-cache-file-save ()
2425   "Save filesets' menu cache file."
2426   (interactive)
2427   (filesets-menu-cache-file-save-maybe t))
2428
2429 (defun filesets-update-cleanup ()
2430   "Rebuild the menu and save the cache file after updating user data."
2431   (interactive)
2432   (message "Filesets v%s: updating menu & cache from version %s"
2433            filesets-version (or filesets-cache-version "???"))
2434   (filesets-build-menu)
2435   (filesets-menu-cache-file-save-maybe)
2436   (filesets-menu-cache-file-load))
2437
2438 (defun filesets-update-pre010505 ()
2439   (let ((msg
2440 "Filesets: manual editing of user data required!
2441
2442 Filesets has detected that you were using an older version before,
2443 which requires some manual updating. Type 'y' for editing the startup
2444 file now.
2445
2446 The layout of `filesets-data' has changed. Please delete your cache file
2447 and edit your startup file as shown below:
2448
2449 1. `filesets-data': Edit all :pattern filesets in your startup file and
2450 transform all entries as shown in this example:
2451
2452         \(\"Test\" (:pattern \"~/dir/^pattern$\"))
2453         --> \(\"Test\" (:pattern \"~/dir/\" \"^pattern$\"))
2454
2455 2. `filesets-data': Change all occurrences of \":document\" to \":ingroup\":
2456
2457       \(\(\"Test\" \(:document \"~/dir/file\"))
2458       --> \(\(\"Test\" \(:ingroup \"~/dir/file\"))
2459
2460 3. `filesets-subdocument-patterns': If you already modified the variable
2461 previously called `filesets-subdocument-patterns', change its name to
2462 `filesets-ingroup-patterns'.
2463
2464 4. `filesets-menu-cache-contents': If you already modified this
2465 variable, change the entry `filesets-subdocument--cache' to
2466 `filesets-ingroup-cache'.
2467
2468 5. Type M-x filesets-update-cleanup and restart Emacs.
2469
2470 We apologize for the inconvenience."))
2471     (let* ((cf (or custom-file user-init-file)))
2472       (switch-to-buffer-other-frame "*Filesets update*")
2473       (insert msg)
2474       (when (y-or-n-p (format "Edit startup (%s) file now? " cf))
2475         (find-file-other-window cf))
2476       (filesets-error 'error msg))))
2477
2478 (defun filesets-update (cached-version)
2479   "Do some cleanup after updating filesets.el."
2480   (cond
2481    ((or (not cached-version)
2482         (string< cached-version "1.5.5")
2483         (boundp 'filesets-subdocument-patterns))
2484     (filesets-update-pre010505)))
2485   (filesets-update-cleanup))
2486
2487 (defun filesets-menu-cache-file-load ()
2488   "Load filesets' menu cache file."
2489   (cond
2490    ((and (not (equal filesets-menu-cache-file ""))
2491          (file-readable-p filesets-menu-cache-file))
2492     (load-file filesets-menu-cache-file)
2493     (if (and (equal filesets-cache-version filesets-version)
2494              (if filesets-cache-hostname-flag
2495                  (equal filesets-cache-hostname (system-name))
2496                t))
2497         (progn
2498           (setq filesets-update-cache-file-flag nil)
2499           t)
2500       (filesets-update filesets-cache-version)))
2501    (t
2502     (setq filesets-update-cache-file-flag t)
2503     nil)))
2504
2505 (defun filesets-exit ()
2506   (filesets-menu-cache-file-save-maybe))
2507
2508 ;;;###autoload
2509 (defun filesets-init ()
2510   "Filesets initialization.
2511 Set up hooks, load the cache file -- if existing -- and build the menu."
2512   (add-hook (if (featurep 'xemacs) 'activate-menubar-hook 'menu-bar-update-hook)
2513             (function filesets-build-menu-maybe))
2514   (add-hook 'kill-buffer-hook (function filesets-remove-from-ubl))
2515   (add-hook 'first-change-hook (function filesets-reset-filename-on-change))
2516   (add-hook 'kill-emacs-hook (function filesets-exit))
2517   (if (filesets-menu-cache-file-load)
2518       (progn
2519         (filesets-build-menu-maybe)
2520         ;;Well, normally when we use XEmacs <= 21.4, custom.el is loaded
2521         ;;after init.el.  This more or less ignores the next
2522         ;;`filesets-data-set-default'
2523         (if filesets-menu-ensure-use-cached
2524             (setq filesets-menu-use-cached-flag t)))
2525     (filesets-build-menu)))
2526
2527
2528 (provide 'filesets)
2529
2530 ;; Local Variables:
2531 ;; sentence-end-double-space:t
2532 ;; End:
2533
2534 ;;; filesets.el ends here