| 1 | ;;; forms.el --- Forms mode: edit a file as a form to fill in |
| 2 | |
| 3 | ;; Copyright (C) 1991, 1994-1997, 2001-2014 Free Software Foundation, |
| 4 | ;; Inc. |
| 5 | |
| 6 | ;; Author: Johan Vromans <jvromans@squirrel.nl> |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or |
| 13 | ;; (at your option) any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | ;;; Commentary: |
| 24 | |
| 25 | ;; Visit a file using a form. See etc/forms for examples. |
| 26 | ;; |
| 27 | ;; === Naming conventions |
| 28 | ;; |
| 29 | ;; The names of all variables and functions start with 'forms-'. |
| 30 | ;; Names which start with 'forms--' are intended for internal use, and |
| 31 | ;; should *NOT* be used from the outside. |
| 32 | ;; |
| 33 | ;; All variables are buffer-local, to enable multiple forms visits |
| 34 | ;; simultaneously. |
| 35 | ;; Variable `forms--mode-setup' is local to *ALL* buffers, for it |
| 36 | ;; controls if forms-mode has been enabled in a buffer. |
| 37 | ;; |
| 38 | ;; === How it works === |
| 39 | ;; |
| 40 | ;; Forms mode means visiting a data file which is supposed to consist |
| 41 | ;; of records each containing a number of fields. The records are |
| 42 | ;; separated by a newline, the fields are separated by a user-defined |
| 43 | ;; field separator (default: TAB). |
| 44 | ;; When shown, a record is transferred to an Emacs buffer and |
| 45 | ;; presented using a user-defined form. One record is shown at a |
| 46 | ;; time. |
| 47 | ;; |
| 48 | ;; Forms mode is a composite mode. It involves two files, and two |
| 49 | ;; buffers. |
| 50 | ;; The first file, called the control file, defines the name of the |
| 51 | ;; data file and the forms format. This file buffer will be used to |
| 52 | ;; present the forms. |
| 53 | ;; The second file holds the actual data. The buffer of this file |
| 54 | ;; will be buried, for it is never accessed directly. |
| 55 | ;; |
| 56 | ;; Forms mode is invoked using M-x `forms-find-file' control-file. |
| 57 | ;; Alternatively `forms-find-file-other-window' can be used. |
| 58 | ;; |
| 59 | ;; You may also visit the control file, and switch to forms mode by hand |
| 60 | ;; with M-x `forms-mode'. |
| 61 | ;; |
| 62 | ;; Automatic mode switching is supported if you specify |
| 63 | ;; "-*- forms -*-" in the first line of the control file. |
| 64 | ;; |
| 65 | ;; The control file is visited, evaluated using `eval-buffer', |
| 66 | ;; and should set at least the following variables: |
| 67 | ;; |
| 68 | ;; forms-file [string] |
| 69 | ;; The name of the data file. |
| 70 | ;; |
| 71 | ;; forms-number-of-fields [integer] |
| 72 | ;; The number of fields in each record. |
| 73 | ;; |
| 74 | ;; forms-format-list [list] |
| 75 | ;; Formatting instructions. |
| 76 | ;; |
| 77 | ;; `forms-format-list' should be a list, each element containing |
| 78 | ;; |
| 79 | ;; - a string, e.g. "hello". The string is inserted in the forms |
| 80 | ;; "as is". |
| 81 | ;; |
| 82 | ;; - an integer, denoting a field number. |
| 83 | ;; The contents of this field are inserted at this point. |
| 84 | ;; Fields are numbered starting with number one. |
| 85 | ;; |
| 86 | ;; - a function call, e.g. (insert "text"). |
| 87 | ;; This function call is dynamically evaluated and should return a |
| 88 | ;; string. It should *NOT* have side-effects on the forms being |
| 89 | ;; constructed. The current fields are available to the function |
| 90 | ;; in the variable `forms-fields', they should *NOT* be modified. |
| 91 | ;; |
| 92 | ;; - a lisp symbol, that must evaluate to one of the above. |
| 93 | ;; |
| 94 | ;; Optional variables which may be set in the control file: |
| 95 | ;; |
| 96 | ;; forms-field-sep [string, default TAB] |
| 97 | ;; The field separator used to separate the |
| 98 | ;; fields in the data file. It may be a string. |
| 99 | ;; |
| 100 | ;; forms-read-only [bool, default nil] |
| 101 | ;; Non-nil means that the data file is visited |
| 102 | ;; read-only (view mode) as opposed to edit mode. |
| 103 | ;; If no write access to the data file is |
| 104 | ;; possible, view mode is enforced. |
| 105 | ;; |
| 106 | ;; forms-check-number-of-fields [bool, default t] |
| 107 | ;; If non-nil, a warning will be issued whenever |
| 108 | ;; a record is found that does not have the number |
| 109 | ;; of fields specified by `forms-number-of-fields'. |
| 110 | ;; |
| 111 | ;; forms-multi-line [string, default "^K"] |
| 112 | ;; If non-null, the records of the data file may |
| 113 | ;; contain fields that can span multiple lines in |
| 114 | ;; the form. |
| 115 | ;; This variable denotes the separator string |
| 116 | ;; to be used for this purpose. Upon display, all |
| 117 | ;; occurrences of this string are translated |
| 118 | ;; to newlines. Upon storage they are translated |
| 119 | ;; back to the separator string. |
| 120 | ;; |
| 121 | ;; forms-forms-scroll [bool, default nil] |
| 122 | ;; Non-nil means: rebind locally the commands that |
| 123 | ;; perform `scroll-up' or `scroll-down' to use |
| 124 | ;; `forms-next-field' resp. `forms-prev-field'. |
| 125 | ;; |
| 126 | ;; forms-forms-jump [bool, default nil] |
| 127 | ;; Non-nil means: rebind locally the commands |
| 128 | ;; `beginning-of-buffer' and `end-of-buffer' to |
| 129 | ;; perform, respectively, `forms-first-record' and |
| 130 | ;; `forms-last-record' instead. |
| 131 | ;; |
| 132 | ;; forms-insert-after [bool, default nil] |
| 133 | ;; Non-nil means: insertions of new records go after |
| 134 | ;; current record, also initial position is at the |
| 135 | ;; last record. The default is to insert before the |
| 136 | ;; current record and the initial position is at the |
| 137 | ;; first record. |
| 138 | ;; |
| 139 | ;; forms-read-file-filter [symbol, default nil] |
| 140 | ;; If not nil: this should be the name of a |
| 141 | ;; function that is called after the forms data file |
| 142 | ;; has been read. It can be used to transform |
| 143 | ;; the contents of the file into a format more suitable |
| 144 | ;; for forms-mode processing. |
| 145 | ;; |
| 146 | ;; forms-write-file-filter [symbol, default nil] |
| 147 | ;; If not nil: this should be the name of a |
| 148 | ;; function that is called before the forms data file |
| 149 | ;; is written (saved) to disk. It can be used to undo |
| 150 | ;; the effects of `forms-read-file-filter', if any. |
| 151 | ;; |
| 152 | ;; forms-new-record-filter [symbol, default nil] |
| 153 | ;; If not nil: this should be the name of a |
| 154 | ;; function that is called when a new |
| 155 | ;; record is created. It can be used to fill in |
| 156 | ;; the new record with default fields, for example. |
| 157 | ;; |
| 158 | ;; forms-modified-record-filter [symbol, default nil] |
| 159 | ;; If not nil: this should be the name of a |
| 160 | ;; function that is called when a record has |
| 161 | ;; been modified. It is called after the fields |
| 162 | ;; are parsed. It can be used to register |
| 163 | ;; modification dates, for example. |
| 164 | ;; |
| 165 | ;; forms-use-text-properties [bool, see text for default] |
| 166 | ;; This variable controls if forms mode should use |
| 167 | ;; text properties to protect the form text from being |
| 168 | ;; modified (using text-property `read-only'). |
| 169 | ;; Also, the read-write fields are shown using a |
| 170 | ;; distinct face, if possible. |
| 171 | ;; As of emacs 19.29, the `intangible' text property |
| 172 | ;; is used to prevent moving into read-only fields. |
| 173 | ;; This variable defaults to t if running Emacs 19 or |
| 174 | ;; later with text properties. |
| 175 | ;; The default face to show read-write fields is |
| 176 | ;; copied from face `region'. |
| 177 | ;; |
| 178 | ;; forms-ro-face [symbol, default 'default] |
| 179 | ;; This is the face that is used to show |
| 180 | ;; read-only text on the screen. If used, this |
| 181 | ;; variable should be set to a symbol that is a |
| 182 | ;; valid face. |
| 183 | ;; E.g. |
| 184 | ;; (make-face 'my-face) |
| 185 | ;; (setq forms-ro-face 'my-face) |
| 186 | ;; |
| 187 | ;; forms-rw-face [symbol, default 'region] |
| 188 | ;; This is the face that is used to show |
| 189 | ;; read-write text on the screen. |
| 190 | ;; |
| 191 | ;; After evaluating the control file, its buffer is cleared and used |
| 192 | ;; for further processing. |
| 193 | ;; The data file (as designated by `forms-file') is visited in a buffer |
| 194 | ;; `forms--file-buffer' which normally will not be shown. |
| 195 | ;; Great malfunctioning may be expected if this file/buffer is modified |
| 196 | ;; outside of this package while it is being visited! |
| 197 | ;; |
| 198 | ;; Normal operation is to transfer one line (record) from the data file, |
| 199 | ;; split it into fields (into `forms--the-record-list'), and display it |
| 200 | ;; using the specs in `forms-format-list'. |
| 201 | ;; A format routine `forms--format' is built upon startup to format |
| 202 | ;; the records according to `forms-format-list'. |
| 203 | ;; |
| 204 | ;; When a form is changed the record is updated as soon as this form |
| 205 | ;; is left. The contents of the form are parsed using information |
| 206 | ;; obtained from `forms-format-list', and the fields which are |
| 207 | ;; deduced from the form are modified. Fields not shown on the forms |
| 208 | ;; retain their original values. The newly formed record then |
| 209 | ;; replaces the contents of the old record in `forms--file-buffer'. |
| 210 | ;; A parse routine `forms--parser' is built upon startup to parse |
| 211 | ;; the records. |
| 212 | ;; |
| 213 | ;; Two exit functions exist: `forms-exit' and `forms-exit-no-save'. |
| 214 | ;; `forms-exit' saves the data to the file, if modified. |
| 215 | ;; `forms-exit-no-save' does not. However, if `forms-exit-no-save' |
| 216 | ;; is executed and the file buffer has been modified, Emacs will ask |
| 217 | ;; questions anyway. |
| 218 | ;; |
| 219 | ;; Other functions provided by forms mode are: |
| 220 | ;; |
| 221 | ;; paging (forward, backward) by record |
| 222 | ;; jumping (first, last, random number) |
| 223 | ;; searching |
| 224 | ;; creating and deleting records |
| 225 | ;; reverting the form (NOT the file buffer) |
| 226 | ;; switching edit <-> view mode v.v. |
| 227 | ;; jumping from field to field |
| 228 | ;; |
| 229 | ;; As a documented side-effect: jumping to the last record in the |
| 230 | ;; file (using forms-last-record) will adjust forms--total-records if |
| 231 | ;; needed. |
| 232 | ;; |
| 233 | ;; The forms buffer can be in one of two modes: edit mode or view |
| 234 | ;; mode. View mode is a read-only mode, whereby you cannot modify the |
| 235 | ;; contents of the buffer. |
| 236 | ;; |
| 237 | ;; Edit mode commands: |
| 238 | ;; |
| 239 | ;; TAB forms-next-field |
| 240 | ;; \C-c TAB forms-next-field |
| 241 | ;; \C-c < forms-first-record |
| 242 | ;; \C-c > forms-last-record |
| 243 | ;; \C-c ? describe-mode |
| 244 | ;; \C-c \C-k forms-delete-record |
| 245 | ;; \C-c \C-q forms-toggle-read-only |
| 246 | ;; \C-c \C-o forms-insert-record |
| 247 | ;; \C-c \C-l forms-jump-record |
| 248 | ;; \C-c \C-n forms-next-record |
| 249 | ;; \C-c \C-p forms-prev-record |
| 250 | ;; \C-c \C-r forms-search-backward |
| 251 | ;; \C-c \C-s forms-search-forward |
| 252 | ;; \C-c \C-x forms-exit |
| 253 | ;; |
| 254 | ;; Read-only mode commands: |
| 255 | ;; |
| 256 | ;; SPC forms-next-record |
| 257 | ;; DEL forms-prev-record |
| 258 | ;; ? describe-mode |
| 259 | ;; \C-q forms-toggle-read-only |
| 260 | ;; l forms-jump-record |
| 261 | ;; n forms-next-record |
| 262 | ;; p forms-prev-record |
| 263 | ;; r forms-search-backward |
| 264 | ;; s forms-search-forward |
| 265 | ;; x forms-exit |
| 266 | ;; |
| 267 | ;; Of course, it is also possible to use the \C-c prefix to obtain the |
| 268 | ;; same command keys as in edit mode. |
| 269 | ;; |
| 270 | ;; The following bindings are available, independent of the mode: |
| 271 | ;; |
| 272 | ;; [next] forms-next-record |
| 273 | ;; [prior] forms-prev-record |
| 274 | ;; [begin] forms-first-record |
| 275 | ;; [end] forms-last-record |
| 276 | ;; [S-TAB] forms-prev-field |
| 277 | ;; [backtab] forms-prev-field |
| 278 | ;; |
| 279 | ;; For convenience, TAB is always bound to `forms-next-field', so you |
| 280 | ;; don't need the C-c prefix for this command. |
| 281 | ;; |
| 282 | ;; As mentioned above (see `forms-forms-scroll' and `forms-forms-jump'), |
| 283 | ;; the bindings of standard functions `scroll-up', `scroll-down', |
| 284 | ;; `beginning-of-buffer' and `end-of-buffer' can be locally replaced with |
| 285 | ;; forms mode functions next/prev record and first/last |
| 286 | ;; record. |
| 287 | ;; |
| 288 | ;; `write-file-functions' is defined to save the actual data file |
| 289 | ;; instead of the buffer data, `revert-file-hook' is defined to |
| 290 | ;; revert a forms to original. |
| 291 | \f |
| 292 | ;;; Code: |
| 293 | |
| 294 | (defgroup forms nil |
| 295 | "Edit a file as a form to fill in." |
| 296 | :group 'data) |
| 297 | |
| 298 | ;;; Global variables and constants: |
| 299 | |
| 300 | (provide 'forms) ;;; official |
| 301 | (provide 'forms-mode) ;;; for compatibility |
| 302 | |
| 303 | (defcustom forms-mode-hook nil |
| 304 | "Hook run upon entering Forms mode." |
| 305 | :group 'forms |
| 306 | :type 'hook) |
| 307 | \f |
| 308 | ;;; Mandatory variables - must be set by evaluating the control file. |
| 309 | |
| 310 | (defvar forms-file nil |
| 311 | "Name of the file holding the data.") |
| 312 | |
| 313 | (defvar forms-format-list nil |
| 314 | "List of formatting specifications.") |
| 315 | |
| 316 | (defvar forms-number-of-fields nil |
| 317 | "Number of fields per record.") |
| 318 | \f |
| 319 | ;;; Optional variables with default values. |
| 320 | |
| 321 | (defcustom forms-check-number-of-fields t |
| 322 | "If non-nil, warn about records with wrong number of fields." |
| 323 | :group 'forms |
| 324 | :type 'boolean) |
| 325 | |
| 326 | (defvar forms-field-sep "\t" |
| 327 | "Field separator character (default TAB).") |
| 328 | |
| 329 | (defvar forms-read-only nil |
| 330 | "Non-nil means: visit the file in view (read-only) mode. |
| 331 | This is set automatically if the file permissions don't let you write it.") |
| 332 | |
| 333 | (defvar forms-multi-line "\C-k" "\ |
| 334 | If not nil: use this character to separate multi-line fields (default C-k).") |
| 335 | |
| 336 | (defcustom forms-forms-scroll nil |
| 337 | "Non-nil means replace scroll-up/down commands in Forms mode. |
| 338 | The replacement commands performs forms-next/prev-record." |
| 339 | :group 'forms |
| 340 | :type 'boolean) |
| 341 | |
| 342 | (defcustom forms-forms-jump nil |
| 343 | "Non-nil means redefine beginning/end-of-buffer in Forms mode. |
| 344 | The replacement commands performs forms-first/last-record." |
| 345 | :group 'forms |
| 346 | :type 'boolean) |
| 347 | |
| 348 | (defvar forms-read-file-filter nil |
| 349 | "The name of a function that is called after reading the data file. |
| 350 | This can be used to change the contents of the file to something more |
| 351 | suitable for forms processing.") |
| 352 | |
| 353 | (defvar forms-write-file-filter nil |
| 354 | "The name of a function that is called before writing the data file. |
| 355 | This can be used to undo the effects of `form-read-file-hook'.") |
| 356 | |
| 357 | (defvar forms-new-record-filter nil |
| 358 | "The name of a function that is called when a new record is created.") |
| 359 | |
| 360 | (defvar forms-modified-record-filter nil |
| 361 | "The name of a function that is called when a record has been modified.") |
| 362 | |
| 363 | (defvar forms-fields nil |
| 364 | "List with fields of the current forms. First field has number 1. |
| 365 | This variable is for use by the filter routines only. |
| 366 | The contents may NOT be modified.") |
| 367 | |
| 368 | (defcustom forms-use-text-properties t |
| 369 | "Non-nil means: use text properties. |
| 370 | Defaults to t if this Emacs is capable of handling text properties." |
| 371 | :group 'forms |
| 372 | :type 'boolean) |
| 373 | |
| 374 | (defcustom forms-insert-after nil |
| 375 | "Non-nil means: inserts of new records go after current record. |
| 376 | Also, initial position is at last record." |
| 377 | :group 'forms |
| 378 | :type 'boolean) |
| 379 | |
| 380 | (defcustom forms-ro-face 'default |
| 381 | "The face (a symbol) that is used to display read-only text on the screen." |
| 382 | :group 'forms |
| 383 | :type 'face) |
| 384 | |
| 385 | (defcustom forms-rw-face 'region |
| 386 | "The face (a symbol) that is used to display read-write text on the screen." |
| 387 | :group 'forms |
| 388 | :type 'face) |
| 389 | \f |
| 390 | ;;; Internal variables. |
| 391 | |
| 392 | (defvar forms--file-buffer nil |
| 393 | "Buffer which holds the file data") |
| 394 | |
| 395 | (defvar forms--total-records 0 |
| 396 | "Total number of records in the data file.") |
| 397 | |
| 398 | (defvar forms--current-record 0 |
| 399 | "Number of the record currently on the screen.") |
| 400 | |
| 401 | (defvar forms-mode-map nil |
| 402 | "Keymap for form buffer.") |
| 403 | (defvar forms-mode-ro-map nil |
| 404 | "Keymap for form buffer in view mode.") |
| 405 | (defvar forms-mode-edit-map nil |
| 406 | "Keymap for form buffer in edit mode.") |
| 407 | |
| 408 | (defvar forms--markers nil |
| 409 | "Field markers in the screen.") |
| 410 | |
| 411 | (defvar forms--dyntexts nil |
| 412 | "Dynamic texts (resulting from function calls) on the screen.") |
| 413 | |
| 414 | (defvar forms--the-record-list nil |
| 415 | "List of strings of the current record, as parsed from the file.") |
| 416 | |
| 417 | (defvar forms--search-regexp nil |
| 418 | "Last regexp used by forms-search functions.") |
| 419 | |
| 420 | (defvar forms--format nil |
| 421 | "Formatting routine.") |
| 422 | |
| 423 | (defvar forms--parser nil |
| 424 | "Forms parser routine.") |
| 425 | |
| 426 | (defvar forms--mode-setup nil |
| 427 | "To keep track of forms-mode being set-up.") |
| 428 | (make-variable-buffer-local 'forms--mode-setup) |
| 429 | |
| 430 | (defvar forms--dynamic-text nil |
| 431 | "Array that holds dynamic texts to insert between fields.") |
| 432 | |
| 433 | (defvar forms--elements nil |
| 434 | "Array with the order in which the fields are displayed.") |
| 435 | |
| 436 | (defvar forms--ro-face nil |
| 437 | "Face used to represent read-only data on the screen.") |
| 438 | |
| 439 | (defvar forms--rw-face nil |
| 440 | "Face used to represent read-write data on the screen.") |
| 441 | \f |
| 442 | (defvar read-file-filter) ; bound in forms--intuit-from-file |
| 443 | |
| 444 | ;;;###autoload |
| 445 | (defun forms-mode (&optional primary) |
| 446 | "Major mode to visit files in a field-structured manner using a form. |
| 447 | |
| 448 | Commands: Equivalent keys in read-only mode: |
| 449 | TAB forms-next-field TAB |
| 450 | C-c TAB forms-next-field |
| 451 | C-c < forms-first-record < |
| 452 | C-c > forms-last-record > |
| 453 | C-c ? describe-mode ? |
| 454 | C-c C-k forms-delete-record |
| 455 | C-c C-q forms-toggle-read-only q |
| 456 | C-c C-o forms-insert-record |
| 457 | C-c C-l forms-jump-record l |
| 458 | C-c C-n forms-next-record n |
| 459 | C-c C-p forms-prev-record p |
| 460 | C-c C-r forms-search-reverse r |
| 461 | C-c C-s forms-search-forward s |
| 462 | C-c C-x forms-exit x |
| 463 | " |
| 464 | (interactive) |
| 465 | |
| 466 | ;; This is not a simple major mode, as usual. Therefore, forms-mode |
| 467 | ;; takes an optional argument `primary' which is used for the |
| 468 | ;; initial set-up. Normal use would leave `primary' to nil. |
| 469 | ;; A global buffer-local variable `forms--mode-setup' has the same |
| 470 | ;; effect but makes it possible to auto-invoke forms-mode using |
| 471 | ;; `find-file'. |
| 472 | ;; Note: although it seems logical to have `make-local-variable' |
| 473 | ;; executed where the variable is first needed, I have deliberately |
| 474 | ;; placed all calls in this function. |
| 475 | |
| 476 | ;; Primary set-up: evaluate buffer and check if the mandatory |
| 477 | ;; variables have been set. |
| 478 | (if (or primary (not forms--mode-setup)) |
| 479 | (progn |
| 480 | ;;(message "forms: setting up...") |
| 481 | (kill-all-local-variables) |
| 482 | |
| 483 | ;; Make mandatory variables. |
| 484 | (make-local-variable 'forms-file) |
| 485 | (make-local-variable 'forms-number-of-fields) |
| 486 | (make-local-variable 'forms-format-list) |
| 487 | |
| 488 | ;; Make optional variables. |
| 489 | (make-local-variable 'forms-field-sep) |
| 490 | (make-local-variable 'forms-read-only) |
| 491 | (make-local-variable 'forms-multi-line) |
| 492 | (make-local-variable 'forms-forms-scroll) |
| 493 | (make-local-variable 'forms-forms-jump) |
| 494 | (make-local-variable 'forms-insert-after) |
| 495 | (make-local-variable 'forms-use-text-properties) |
| 496 | |
| 497 | ;; Filter functions. |
| 498 | (make-local-variable 'forms-read-file-filter) |
| 499 | (make-local-variable 'forms-write-file-filter) |
| 500 | (make-local-variable 'forms-new-record-filter) |
| 501 | (make-local-variable 'forms-modified-record-filter) |
| 502 | |
| 503 | ;; Make sure no filters exist. |
| 504 | (setq forms-read-file-filter nil) |
| 505 | (setq forms-write-file-filter nil) |
| 506 | (setq forms-new-record-filter nil) |
| 507 | (setq forms-modified-record-filter nil) |
| 508 | |
| 509 | ;; If running Emacs 19 under X, setup faces to show read-only and |
| 510 | ;; read-write fields. |
| 511 | (if (fboundp 'make-face) |
| 512 | (progn |
| 513 | (make-local-variable 'forms-ro-face) |
| 514 | (make-local-variable 'forms-rw-face))) |
| 515 | |
| 516 | ;; eval the buffer, should set variables |
| 517 | ;;(message "forms: processing control file...") |
| 518 | ;; If enable-local-eval is not set to t the user is asked first. |
| 519 | (if (or (eq enable-local-eval t) |
| 520 | (yes-or-no-p |
| 521 | (concat "Evaluate lisp code in buffer " |
| 522 | (buffer-name) " to display forms? "))) |
| 523 | (eval-buffer) |
| 524 | (error "`enable-local-eval' inhibits buffer evaluation")) |
| 525 | |
| 526 | ;; Check if the mandatory variables make sense. |
| 527 | (or forms-file |
| 528 | (error (concat "Forms control file error: " |
| 529 | "`forms-file' has not been set"))) |
| 530 | |
| 531 | ;; Check forms-field-sep first, since it can be needed to |
| 532 | ;; construct a default format list. |
| 533 | (or (stringp forms-field-sep) |
| 534 | (error (concat "Forms control file error: " |
| 535 | "`forms-field-sep' is not a string"))) |
| 536 | |
| 537 | (if forms-number-of-fields |
| 538 | (or (and (numberp forms-number-of-fields) |
| 539 | (> forms-number-of-fields 0)) |
| 540 | (error (concat "Forms control file error: " |
| 541 | "`forms-number-of-fields' must be a number > 0"))) |
| 542 | (or (null forms-format-list) |
| 543 | (error (concat "Forms control file error: " |
| 544 | "`forms-number-of-fields' has not been set")))) |
| 545 | |
| 546 | (or forms-format-list |
| 547 | (forms--intuit-from-file)) |
| 548 | |
| 549 | (if forms-multi-line |
| 550 | (if (and (stringp forms-multi-line) |
| 551 | (eq (length forms-multi-line) 1)) |
| 552 | (if (string= forms-multi-line forms-field-sep) |
| 553 | (error (concat "Forms control file error: " |
| 554 | "`forms-multi-line' is equal to `forms-field-sep'"))) |
| 555 | (error (concat "Forms control file error: " |
| 556 | "`forms-multi-line' must be nil or a one-character string")))) |
| 557 | (or (fboundp 'set-text-properties) |
| 558 | (setq forms-use-text-properties nil)) |
| 559 | |
| 560 | ;; Validate and process forms-format-list. |
| 561 | ;;(message "forms: pre-processing format list...") |
| 562 | (make-local-variable 'forms--elements) |
| 563 | (forms--process-format-list) |
| 564 | |
| 565 | ;; Build the formatter and parser. |
| 566 | ;;(message "forms: building formatter...") |
| 567 | (make-local-variable 'forms--format) |
| 568 | (make-local-variable 'forms--markers) |
| 569 | (make-local-variable 'forms--dyntexts) |
| 570 | ;;(message "forms: building parser...") |
| 571 | (forms--make-format) |
| 572 | (make-local-variable 'forms--parser) |
| 573 | (forms--make-parser) |
| 574 | ;;(message "forms: building parser... done.") |
| 575 | |
| 576 | ;; Check if record filters are defined. |
| 577 | (if (and forms-new-record-filter |
| 578 | (not (fboundp forms-new-record-filter))) |
| 579 | (error (concat "Forms control file error: " |
| 580 | "`forms-new-record-filter' is not a function"))) |
| 581 | |
| 582 | (if (and forms-modified-record-filter |
| 583 | (not (fboundp forms-modified-record-filter))) |
| 584 | (error (concat "Forms control file error: " |
| 585 | "`forms-modified-record-filter' is not a function"))) |
| 586 | |
| 587 | ;; The filters access the contents of the forms using `forms-fields'. |
| 588 | (make-local-variable 'forms-fields) |
| 589 | |
| 590 | ;; Dynamic text support. |
| 591 | (make-local-variable 'forms--dynamic-text) |
| 592 | |
| 593 | ;; Prevent accidental overwrite of the control file and auto-save. |
| 594 | (set-visited-file-name nil) |
| 595 | |
| 596 | ;; Prepare this buffer for further processing. |
| 597 | (setq buffer-read-only nil) |
| 598 | (erase-buffer) |
| 599 | |
| 600 | ;;(message "forms: setting up... done.") |
| 601 | )) |
| 602 | |
| 603 | ;; initialization done |
| 604 | (setq forms--mode-setup t) |
| 605 | |
| 606 | ;; Copy desired faces to the actual variables used by the forms formatter. |
| 607 | (if (fboundp 'make-face) |
| 608 | (progn |
| 609 | (make-local-variable 'forms--ro-face) |
| 610 | (make-local-variable 'forms--rw-face) |
| 611 | (if forms-read-only |
| 612 | (progn |
| 613 | (setq forms--ro-face forms-ro-face) |
| 614 | (setq forms--rw-face forms-ro-face)) |
| 615 | (setq forms--ro-face forms-ro-face) |
| 616 | (setq forms--rw-face forms-rw-face)))) |
| 617 | |
| 618 | ;; Make more local variables. |
| 619 | (make-local-variable 'forms--file-buffer) |
| 620 | (make-local-variable 'forms--total-records) |
| 621 | (make-local-variable 'forms--current-record) |
| 622 | (make-local-variable 'forms--the-record-list) |
| 623 | (make-local-variable 'forms--search-regexp) |
| 624 | |
| 625 | ; The keymaps are global, so multiple forms mode buffers can share them. |
| 626 | ;(make-local-variable 'forms-mode-map) |
| 627 | ;(make-local-variable 'forms-mode-ro-map) |
| 628 | ;(make-local-variable 'forms-mode-edit-map) |
| 629 | (if forms-mode-map ; already defined |
| 630 | nil |
| 631 | ;;(message "forms: building keymap...") |
| 632 | (forms--mode-commands) |
| 633 | ;;(message "forms: building keymap... done.") |
| 634 | ) |
| 635 | |
| 636 | ;; set the major mode indicator |
| 637 | (setq major-mode 'forms-mode) |
| 638 | (setq mode-name "Forms") |
| 639 | |
| 640 | ;; find the data file |
| 641 | (setq forms--file-buffer (find-file-noselect forms-file)) |
| 642 | |
| 643 | ;; Pre-transform. |
| 644 | (let ((read-file-filter forms-read-file-filter) |
| 645 | (write-file-filter forms-write-file-filter)) |
| 646 | (if read-file-filter |
| 647 | (with-current-buffer forms--file-buffer |
| 648 | (let ((inhibit-read-only t) |
| 649 | (file-modified (buffer-modified-p))) |
| 650 | (run-hooks 'read-file-filter) |
| 651 | (if (not file-modified) (set-buffer-modified-p nil))) |
| 652 | (if write-file-filter |
| 653 | (add-hook 'write-file-functions write-file-filter nil t))) |
| 654 | (if write-file-filter |
| 655 | (with-current-buffer forms--file-buffer |
| 656 | (add-hook 'write-file-functions write-file-filter nil t))))) |
| 657 | |
| 658 | ;; count the number of records, and set see if it may be modified |
| 659 | (let (ro) |
| 660 | (setq forms--total-records |
| 661 | (with-current-buffer forms--file-buffer |
| 662 | (prog1 |
| 663 | (progn |
| 664 | ;;(message "forms: counting records...") |
| 665 | (bury-buffer (current-buffer)) |
| 666 | (setq ro buffer-read-only) |
| 667 | (count-lines (point-min) (point-max))) |
| 668 | ;;(message "forms: counting records... done.") |
| 669 | ))) |
| 670 | (if ro |
| 671 | (setq forms-read-only t))) |
| 672 | |
| 673 | ;;(message "forms: proceeding setup...") |
| 674 | |
| 675 | ;; Since we aren't really implementing a minor mode, we hack the mode line |
| 676 | ;; directly to get the text " View " into forms-read-only form buffers. For |
| 677 | ;; that reason, this variable must be buffer only. |
| 678 | (make-local-variable 'minor-mode-alist) |
| 679 | (setq minor-mode-alist (list (list 'forms-read-only " View"))) |
| 680 | |
| 681 | ;;(message "forms: proceeding setup (keymaps)...") |
| 682 | (forms--set-keymaps) |
| 683 | ;;(message "forms: proceeding setup (commands)...") |
| 684 | (forms--change-commands) |
| 685 | |
| 686 | ;;(message "forms: proceeding setup (buffer)...") |
| 687 | (set-buffer-modified-p nil) |
| 688 | |
| 689 | (if (= forms--total-records 0) |
| 690 | ;;(message "forms: proceeding setup (new file)...") |
| 691 | (progn |
| 692 | (insert |
| 693 | "GNU Emacs Forms Mode\n\n" |
| 694 | (if (file-exists-p forms-file) |
| 695 | (concat "No records available in file `" forms-file "'\n\n") |
| 696 | (format "Creating new file `%s'\nwith %d field%s per record\n\n" |
| 697 | forms-file forms-number-of-fields |
| 698 | (if (= 1 forms-number-of-fields) "" "s"))) |
| 699 | "Use " (substitute-command-keys "\\[forms-insert-record]") |
| 700 | " to create new records.\n") |
| 701 | (setq forms--current-record 1) |
| 702 | (setq buffer-read-only t) |
| 703 | (set-buffer-modified-p nil)) |
| 704 | |
| 705 | ;; setup the first (or current) record to show |
| 706 | (if (< forms--current-record 1) |
| 707 | (setq forms--current-record 1)) |
| 708 | (forms-jump-record forms--current-record) |
| 709 | |
| 710 | (if forms-insert-after |
| 711 | (forms-last-record) |
| 712 | (forms-first-record)) |
| 713 | ) |
| 714 | |
| 715 | ;; user customizing |
| 716 | ;;(message "forms: proceeding setup (user hooks)...") |
| 717 | (run-mode-hooks 'forms-mode-hook 'forms-mode-hooks) |
| 718 | ;;(message "forms: setting up... done.") |
| 719 | |
| 720 | ;; be helpful |
| 721 | (forms--help) |
| 722 | ) |
| 723 | \f |
| 724 | (defun forms--process-format-list () |
| 725 | ;; Validate `forms-format-list' and set some global variables. |
| 726 | ;; Symbols in the list are evaluated, and consecutive strings are |
| 727 | ;; concatenated. |
| 728 | ;; Array `forms--elements' is constructed that contains the order |
| 729 | ;; of the fields on the display. This array is used by |
| 730 | ;; `forms--parser-using-text-properties' to extract the fields data |
| 731 | ;; from the form on the screen. |
| 732 | ;; Upon completion, `forms-format-list' is guaranteed correct, so |
| 733 | ;; `forms--make-format' and `forms--make-parser' do not need to perform |
| 734 | ;; any checks. |
| 735 | |
| 736 | ;; Verify that `forms-format-list' is not nil. |
| 737 | (or forms-format-list |
| 738 | (error (concat "Forms control file error: " |
| 739 | "`forms-format-list' has not been set"))) |
| 740 | ;; It must be a list. |
| 741 | (or (listp forms-format-list) |
| 742 | (error (concat "Forms control file error: " |
| 743 | "`forms-format-list' is not a list"))) |
| 744 | |
| 745 | ;; Assume every field is painted once. |
| 746 | ;; `forms--elements' will grow if needed. |
| 747 | (setq forms--elements (make-vector forms-number-of-fields nil)) |
| 748 | |
| 749 | (let ((the-list forms-format-list) ; the list of format elements |
| 750 | (prev-item nil) |
| 751 | (field-num 0)) ; highest field number |
| 752 | |
| 753 | (setq forms-format-list nil) ; gonna rebuild |
| 754 | |
| 755 | (while the-list |
| 756 | |
| 757 | (let ((el (car-safe the-list)) |
| 758 | (rem (cdr-safe the-list))) |
| 759 | |
| 760 | ;; If it is a symbol, eval it first. |
| 761 | (if (and (symbolp el) |
| 762 | (boundp el)) |
| 763 | (setq el (eval el))) |
| 764 | |
| 765 | (cond |
| 766 | |
| 767 | ;; Try string ... |
| 768 | ((stringp el) |
| 769 | (if (stringp prev-item) ; try to concatenate strings |
| 770 | (setq prev-item (concat prev-item el)) |
| 771 | (if prev-item |
| 772 | (setq forms-format-list |
| 773 | (append forms-format-list (list prev-item) nil))) |
| 774 | (setq prev-item el))) |
| 775 | |
| 776 | ;; Try numeric ... |
| 777 | ((numberp el) |
| 778 | |
| 779 | ;; Validate range. |
| 780 | (if (or (<= el 0) |
| 781 | (> el forms-number-of-fields)) |
| 782 | (error (concat "Forms format error: " |
| 783 | "field number %d out of range 1..%d") |
| 784 | el forms-number-of-fields)) |
| 785 | |
| 786 | ;; Store forms order. |
| 787 | (if (>= field-num (length forms--elements)) |
| 788 | (setq forms--elements (vconcat forms--elements (1- el))) |
| 789 | (aset forms--elements field-num (1- el))) |
| 790 | (setq field-num (1+ field-num)) |
| 791 | |
| 792 | (if prev-item |
| 793 | (setq forms-format-list |
| 794 | (append forms-format-list (list prev-item) nil))) |
| 795 | (setq prev-item el)) |
| 796 | |
| 797 | ;; Try function ... |
| 798 | ((listp el) |
| 799 | |
| 800 | ;; Validate. |
| 801 | (or (fboundp (car-safe el)) |
| 802 | (error (concat "Forms format error: " |
| 803 | "%S is not a function") |
| 804 | (car-safe el))) |
| 805 | |
| 806 | ;; Shift. |
| 807 | (if prev-item |
| 808 | (setq forms-format-list |
| 809 | (append forms-format-list (list prev-item) nil))) |
| 810 | (setq prev-item el)) |
| 811 | |
| 812 | ;; else |
| 813 | (t |
| 814 | (error (concat "Forms format error: " |
| 815 | "invalid element %S") |
| 816 | el))) |
| 817 | |
| 818 | ;; Advance to next element of the list. |
| 819 | (setq the-list rem))) |
| 820 | |
| 821 | ;; Append last item. |
| 822 | (if prev-item |
| 823 | (progn |
| 824 | (setq forms-format-list |
| 825 | (append forms-format-list (list prev-item) nil)) |
| 826 | ;; Append a newline if the last item is a field. |
| 827 | ;; This prevents parsing problems. |
| 828 | ;; Also it makes it possible to insert an empty last field. |
| 829 | (if (numberp prev-item) |
| 830 | (setq forms-format-list |
| 831 | (append forms-format-list (list "\n") nil)))))) |
| 832 | |
| 833 | (forms--debug 'forms-format-list |
| 834 | 'forms--elements)) |
| 835 | \f |
| 836 | ;; Special treatment for read-only segments. |
| 837 | ;; |
| 838 | ;; If text is inserted between two read-only segments, there seems to |
| 839 | ;; be no way to give the newly inserted text the RW face. |
| 840 | ;; To solve this, read-only segments get the `insert-in-front-hooks' |
| 841 | ;; property set with a function that temporarily switches the |
| 842 | ;; properties of the first character of the segment to the RW face, so |
| 843 | ;; the new text gets the right face. The `post-command-hook' is |
| 844 | ;; used to restore the original properties. |
| 845 | |
| 846 | (defvar forms--iif-start nil |
| 847 | "Record start of modification command.") |
| 848 | (defvar forms--iif-properties nil |
| 849 | "Original properties of the character being overridden.") |
| 850 | |
| 851 | (defun forms--iif-hook (_begin _end) |
| 852 | "`insert-in-front-hooks' function for read-only segments." |
| 853 | |
| 854 | ;; Note start location. By making it a marker that points one |
| 855 | ;; character beyond the actual location, it is guaranteed to move |
| 856 | ;; correctly if text is inserted. |
| 857 | (or forms--iif-start |
| 858 | (setq forms--iif-start (copy-marker (1+ (point))))) |
| 859 | |
| 860 | ;; Check if there is special treatment required. |
| 861 | (if (or (<= forms--iif-start 2) |
| 862 | (get-text-property (- forms--iif-start 2) |
| 863 | 'read-only)) |
| 864 | (progn |
| 865 | ;; Fetch current properties. |
| 866 | (setq forms--iif-properties |
| 867 | (text-properties-at (1- forms--iif-start))) |
| 868 | |
| 869 | ;; Replace them. |
| 870 | (let ((inhibit-read-only t)) |
| 871 | (set-text-properties |
| 872 | (1- forms--iif-start) forms--iif-start |
| 873 | (list 'face forms--rw-face 'front-sticky '(face)))) |
| 874 | |
| 875 | ;; Enable `post-command-hook' to restore the properties. |
| 876 | (setq post-command-hook |
| 877 | (append (list 'forms--iif-post-command-hook) post-command-hook))) |
| 878 | |
| 879 | ;; No action needed. Clear marker. |
| 880 | (setq forms--iif-start nil))) |
| 881 | |
| 882 | (defun forms--iif-post-command-hook () |
| 883 | "`post-command-hook' function for read-only segments." |
| 884 | |
| 885 | ;; Disable `post-command-hook'. |
| 886 | (setq post-command-hook |
| 887 | (delq 'forms--iif-hook-post-command-hook post-command-hook)) |
| 888 | |
| 889 | ;; Restore properties. |
| 890 | (if forms--iif-start |
| 891 | (let ((inhibit-read-only t)) |
| 892 | (set-text-properties |
| 893 | (1- forms--iif-start) forms--iif-start |
| 894 | forms--iif-properties))) |
| 895 | |
| 896 | ;; Cleanup. |
| 897 | (setq forms--iif-start nil)) |
| 898 | \f |
| 899 | (defvar forms--marker) |
| 900 | (defvar forms--dyntext) |
| 901 | |
| 902 | (defun forms--make-format () |
| 903 | "Generate `forms--format' using the information in `forms-format-list'." |
| 904 | |
| 905 | ;; The real work is done using a mapcar of `forms--make-format-elt' on |
| 906 | ;; `forms-format-list'. |
| 907 | ;; This function sets up the necessary environment, and decides |
| 908 | ;; which function to mapcar. |
| 909 | |
| 910 | (let ((forms--marker 0) |
| 911 | (forms--dyntext 0)) |
| 912 | (setq |
| 913 | forms--format |
| 914 | (if forms-use-text-properties |
| 915 | `(lambda (arg) |
| 916 | (let ((inhibit-read-only t)) |
| 917 | ,@(apply 'append |
| 918 | (mapcar #'forms--make-format-elt-using-text-properties |
| 919 | forms-format-list)) |
| 920 | ;; Prevent insertion before the first text. |
| 921 | ,@(if (numberp (car forms-format-list)) |
| 922 | nil |
| 923 | '((add-text-properties (point-min) (1+ (point-min)) |
| 924 | '(front-sticky (read-only intangible))))) |
| 925 | ;; Prevent insertion after the last text. |
| 926 | (remove-text-properties (1- (point)) (point) |
| 927 | '(rear-nonsticky))) |
| 928 | (setq forms--iif-start nil)) |
| 929 | `(lambda (arg) |
| 930 | ,@(apply 'append |
| 931 | (mapcar #'forms--make-format-elt forms-format-list))))) |
| 932 | |
| 933 | ;; We have tallied the number of markers and dynamic texts, |
| 934 | ;; so we can allocate the arrays now. |
| 935 | (setq forms--markers (make-vector forms--marker nil)) |
| 936 | (setq forms--dyntexts (make-vector forms--dyntext nil))) |
| 937 | (forms--debug 'forms--format)) |
| 938 | |
| 939 | (defun forms--make-format-elt-using-text-properties (el) |
| 940 | "Helper routine to generate format function." |
| 941 | |
| 942 | ;; The format routine `forms--format' will look like |
| 943 | ;; |
| 944 | ;; ;; preamble |
| 945 | ;; (lambda (arg) |
| 946 | ;; (let ((inhibit-read-only t)) |
| 947 | ;; |
| 948 | ;; ;; A string, e.g. "text: ". |
| 949 | ;; (set-text-properties |
| 950 | ;; (point) |
| 951 | ;; (progn (insert "text: ") (point)) |
| 952 | ;; (list 'face forms--ro-face |
| 953 | ;; 'read-only 1 |
| 954 | ;; 'insert-in-front-hooks 'forms--iif-hook |
| 955 | ;; 'rear-nonsticky '(read-only face insert-in-front-hooks))) |
| 956 | ;; |
| 957 | ;; ;; A field, e.g. 6. |
| 958 | ;; (let ((here (point))) |
| 959 | ;; (aset forms--markers 0 (point-marker)) |
| 960 | ;; (insert (elt arg 5)) |
| 961 | ;; (or (= (point) here) |
| 962 | ;; (set-text-properties |
| 963 | ;; here (point) |
| 964 | ;; (list 'face forms--rw-face |
| 965 | ;; 'front-sticky '(face)))) |
| 966 | ;; |
| 967 | ;; ;; Another string, e.g. "\nmore text: ". |
| 968 | ;; (set-text-properties |
| 969 | ;; (point) |
| 970 | ;; (progn (insert "\nmore text: ") (point)) |
| 971 | ;; (list 'face forms--ro-face |
| 972 | ;; 'read-only 2 |
| 973 | ;; 'insert-in-front-hooks 'forms--iif-hook |
| 974 | ;; 'rear-nonsticky '(read-only face insert-in-front-hooks))) |
| 975 | ;; |
| 976 | ;; ;; A function, e.g. (tocol 40). |
| 977 | ;; (set-text-properties |
| 978 | ;; (point) |
| 979 | ;; (progn |
| 980 | ;; (insert (aset forms--dyntexts 0 (tocol 40))) |
| 981 | ;; (point)) |
| 982 | ;; (list 'face forms--ro-face |
| 983 | ;; 'read-only 2 |
| 984 | ;; 'insert-in-front-hooks 'forms--iif-hook |
| 985 | ;; 'rear-nonsticky '(read-only face insert-in-front-hooks))) |
| 986 | ;; |
| 987 | ;; ;; Prevent insertion before the first text. |
| 988 | ;; (add-text-properties (point-min) (1+ (point-min)) |
| 989 | ;; '(front-sticky (read-only)))))) |
| 990 | ;; ;; Prevent insertion after the last text. |
| 991 | ;; (remove-text-properties (1- (point)) (point) |
| 992 | ;; '(rear-nonsticky))) |
| 993 | ;; |
| 994 | ;; ;; wrap up |
| 995 | ;; (setq forms--iif-start nil) |
| 996 | ;; )) |
| 997 | |
| 998 | (cond |
| 999 | ((stringp el) |
| 1000 | |
| 1001 | `((set-text-properties |
| 1002 | (point) ; start at point |
| 1003 | (progn ; until after insertion |
| 1004 | (insert ,el) |
| 1005 | (point)) |
| 1006 | (list 'face forms--ro-face ; read-only appearance |
| 1007 | 'read-only ,@(list (1+ forms--marker)) |
| 1008 | 'intangible ,@(list (1+ forms--marker)) |
| 1009 | 'insert-in-front-hooks '(forms--iif-hook) |
| 1010 | 'rear-nonsticky '(face read-only insert-in-front-hooks |
| 1011 | intangible))))) |
| 1012 | |
| 1013 | ((numberp el) |
| 1014 | `((let ((here (point))) |
| 1015 | (aset forms--markers |
| 1016 | ,(prog1 forms--marker |
| 1017 | (setq forms--marker (1+ forms--marker))) |
| 1018 | (point-marker)) |
| 1019 | (insert (elt arg ,(1- el))) |
| 1020 | (or (= (point) here) |
| 1021 | (set-text-properties |
| 1022 | here (point) |
| 1023 | (list 'face forms--rw-face |
| 1024 | 'front-sticky '(face))))))) |
| 1025 | |
| 1026 | ((listp el) |
| 1027 | `((set-text-properties |
| 1028 | (point) |
| 1029 | (progn |
| 1030 | (insert (aset forms--dyntexts |
| 1031 | ,(prog1 forms--dyntext |
| 1032 | (setq forms--dyntext (1+ forms--dyntext))) |
| 1033 | ,el)) |
| 1034 | (point)) |
| 1035 | (list 'face forms--ro-face |
| 1036 | 'read-only ,@(list (1+ forms--marker)) |
| 1037 | 'intangible ,@(list (1+ forms--marker)) |
| 1038 | 'insert-in-front-hooks '(forms--iif-hook) |
| 1039 | 'rear-nonsticky '(read-only face insert-in-front-hooks |
| 1040 | intangible))))) |
| 1041 | |
| 1042 | ;; end of cond |
| 1043 | )) |
| 1044 | |
| 1045 | (defun forms--make-format-elt (el) |
| 1046 | "Helper routine to generate format function." |
| 1047 | |
| 1048 | ;; If we're not using text properties, the format routine |
| 1049 | ;; `forms--format' will look like |
| 1050 | ;; |
| 1051 | ;; (lambda (arg) |
| 1052 | ;; ;; a string, e.g. "text: " |
| 1053 | ;; (insert "text: ") |
| 1054 | ;; ;; a field, e.g. 6 |
| 1055 | ;; (aset forms--markers 0 (point-marker)) |
| 1056 | ;; (insert (elt arg 5)) |
| 1057 | ;; ;; another string, e.g. "\nmore text: " |
| 1058 | ;; (insert "\nmore text: ") |
| 1059 | ;; ;; a function, e.g. (tocol 40) |
| 1060 | ;; (insert (aset forms--dyntexts 0 (tocol 40))) |
| 1061 | ;; ... ) |
| 1062 | |
| 1063 | (cond |
| 1064 | ((stringp el) |
| 1065 | `((insert ,el))) |
| 1066 | ((numberp el) |
| 1067 | (prog1 |
| 1068 | `((aset forms--markers ,forms--marker (point-marker)) |
| 1069 | (insert (elt arg ,(1- el)))) |
| 1070 | (setq forms--marker (1+ forms--marker)))) |
| 1071 | ((listp el) |
| 1072 | (prog1 |
| 1073 | `((insert (aset forms--dyntexts ,forms--dyntext ,el))) |
| 1074 | (setq forms--dyntext (1+ forms--dyntext)))))) |
| 1075 | \f |
| 1076 | (defvar forms--field) |
| 1077 | (defvar forms--recordv) |
| 1078 | (defvar forms--seen-text) |
| 1079 | |
| 1080 | (defun forms--make-parser () |
| 1081 | "Generate `forms--parser' from the information in `forms-format-list'." |
| 1082 | |
| 1083 | ;; If we can use text properties, we simply set it to |
| 1084 | ;; `forms--parser-using-text-properties'. |
| 1085 | ;; Otherwise, the function is constructed using a mapcar of |
| 1086 | ;; `forms--make-parser-elt on `forms-format-list'. |
| 1087 | |
| 1088 | (setq |
| 1089 | forms--parser |
| 1090 | (if forms-use-text-properties |
| 1091 | (function forms--parser-using-text-properties) |
| 1092 | (let ((forms--field nil) |
| 1093 | (forms--seen-text nil) |
| 1094 | (forms--dyntext 0)) |
| 1095 | |
| 1096 | ;; Note: we add a nil element to the list passed to `mapcar', |
| 1097 | ;; see `forms--make-parser-elt' for details. |
| 1098 | `(lambda nil |
| 1099 | (let (here) |
| 1100 | (goto-char (point-min)) |
| 1101 | ,@(apply 'append |
| 1102 | (mapcar |
| 1103 | #'forms--make-parser-elt |
| 1104 | (append forms-format-list (list nil))))))))) |
| 1105 | |
| 1106 | (forms--debug 'forms--parser)) |
| 1107 | |
| 1108 | (defun forms--parser-using-text-properties () |
| 1109 | "Extract field info from forms when using text properties." |
| 1110 | |
| 1111 | ;; Using text properties, we can simply jump to the markers, and |
| 1112 | ;; extract the information up to the following read-only segment. |
| 1113 | |
| 1114 | (let ((i 0) |
| 1115 | here there) |
| 1116 | (while (< i (length forms--markers)) |
| 1117 | (goto-char (setq here (aref forms--markers i))) |
| 1118 | (if (get-text-property here 'read-only) |
| 1119 | (aset forms--recordv (aref forms--elements i) nil) |
| 1120 | (if (setq there |
| 1121 | (next-single-property-change here 'read-only)) |
| 1122 | (aset forms--recordv (aref forms--elements i) |
| 1123 | (buffer-substring-no-properties here there)) |
| 1124 | (aset forms--recordv (aref forms--elements i) |
| 1125 | (buffer-substring-no-properties here (point-max))))) |
| 1126 | (setq i (1+ i))))) |
| 1127 | |
| 1128 | (defun forms--make-parser-elt (el) |
| 1129 | "Helper routine to generate forms parser function." |
| 1130 | |
| 1131 | ;; The parse routine will look like: |
| 1132 | ;; |
| 1133 | ;; (lambda nil |
| 1134 | ;; (let (here) |
| 1135 | ;; (goto-char (point-min)) |
| 1136 | ;; |
| 1137 | ;; ;; "text: " |
| 1138 | ;; (if (not (looking-at "text: ")) |
| 1139 | ;; (error "Parse error: cannot find \"text: \"")) |
| 1140 | ;; (forward-char 6) ; past "text: " |
| 1141 | ;; |
| 1142 | ;; ;; 6 |
| 1143 | ;; ;; "\nmore text: " |
| 1144 | ;; (setq here (point)) |
| 1145 | ;; (if (not (search-forward "\nmore text: " nil t nil)) |
| 1146 | ;; (error "Parse error: cannot find \"\\nmore text: \"")) |
| 1147 | ;; (aset forms--recordv 5 (buffer-substring-no-properties here (- (point) 12))) |
| 1148 | ;; |
| 1149 | ;; ;; (tocol 40) |
| 1150 | ;; (let ((forms--dyntext (car-safe forms--dynamic-text))) |
| 1151 | ;; (if (not (looking-at (regexp-quote forms--dyntext))) |
| 1152 | ;; (error "Parse error: not looking at \"%s\"" forms--dyntext)) |
| 1153 | ;; (forward-char (length forms--dyntext)) |
| 1154 | ;; (setq forms--dynamic-text (cdr-safe forms--dynamic-text))) |
| 1155 | ;; ... |
| 1156 | ;; ;; final flush (due to terminator sentinel, see below) |
| 1157 | ;; (aset forms--recordv 7 (buffer-substring-no-properties (point) (point-max))) |
| 1158 | |
| 1159 | (cond |
| 1160 | ((stringp el) |
| 1161 | (prog1 |
| 1162 | (if forms--field |
| 1163 | `((setq here (point)) |
| 1164 | (if (not (search-forward ,el nil t nil)) |
| 1165 | (error "Parse error: cannot find `%s'" ,el)) |
| 1166 | (aset forms--recordv ,(1- forms--field) |
| 1167 | (buffer-substring-no-properties here |
| 1168 | (- (point) ,(length el))))) |
| 1169 | `((if (not (looking-at ,(regexp-quote el))) |
| 1170 | (error "Parse error: not looking at `%s'" ,el)) |
| 1171 | (forward-char ,(length el)))) |
| 1172 | (setq forms--seen-text t) |
| 1173 | (setq forms--field nil))) |
| 1174 | ((numberp el) |
| 1175 | (if forms--field |
| 1176 | (error "Cannot parse adjacent fields %d and %d" |
| 1177 | forms--field el) |
| 1178 | (setq forms--field el) |
| 1179 | nil)) |
| 1180 | ((null el) |
| 1181 | (if forms--field |
| 1182 | `((aset forms--recordv ,(1- forms--field) |
| 1183 | (buffer-substring-no-properties (point) (point-max)))))) |
| 1184 | ((listp el) |
| 1185 | (prog1 |
| 1186 | (if forms--field |
| 1187 | `((let ((here (point)) |
| 1188 | (forms--dyntext (aref forms--dyntexts ,forms--dyntext))) |
| 1189 | (if (not (search-forward forms--dyntext nil t nil)) |
| 1190 | (error "Parse error: cannot find `%s'" forms--dyntext)) |
| 1191 | (aset forms--recordv ,(1- forms--field) |
| 1192 | (buffer-substring-no-properties here |
| 1193 | (- (point) (length forms--dyntext)))))) |
| 1194 | `((let ((forms--dyntext (aref forms--dyntexts ,forms--dyntext))) |
| 1195 | (if (not (looking-at (regexp-quote forms--dyntext))) |
| 1196 | (error "Parse error: not looking at `%s'" forms--dyntext)) |
| 1197 | (forward-char (length forms--dyntext))))) |
| 1198 | (setq forms--dyntext (1+ forms--dyntext)) |
| 1199 | (setq forms--seen-text t) |
| 1200 | (setq forms--field nil))) |
| 1201 | )) |
| 1202 | \f |
| 1203 | (defun forms--intuit-from-file () |
| 1204 | "Get number of fields and a default form using the data file." |
| 1205 | |
| 1206 | ;; If `forms-number-of-fields' is not set, get it from the data file. |
| 1207 | (if (null forms-number-of-fields) |
| 1208 | |
| 1209 | ;; Need a file to do this. |
| 1210 | (if (not (file-exists-p forms-file)) |
| 1211 | (error "Need existing file or explicit `forms-number-of-fields'") |
| 1212 | |
| 1213 | ;; Visit the file and extract the first record. |
| 1214 | (setq forms--file-buffer (find-file-noselect forms-file)) |
| 1215 | (let ((read-file-filter forms-read-file-filter) |
| 1216 | (the-record)) |
| 1217 | (setq the-record |
| 1218 | (with-current-buffer forms--file-buffer |
| 1219 | (let ((inhibit-read-only t)) |
| 1220 | (run-hooks 'read-file-filter)) |
| 1221 | (goto-char (point-min)) |
| 1222 | (forms--get-record))) |
| 1223 | |
| 1224 | ;; This may be overkill, but try to avoid interference with |
| 1225 | ;; the normal processing. |
| 1226 | (kill-buffer forms--file-buffer) |
| 1227 | |
| 1228 | ;; Count the number of fields in `the-record'. |
| 1229 | (let ((start-pos 0) |
| 1230 | found-pos |
| 1231 | (field-sep-length (length forms-field-sep))) |
| 1232 | (setq forms-number-of-fields 1) |
| 1233 | (while (setq found-pos |
| 1234 | (string-match forms-field-sep the-record start-pos)) |
| 1235 | (progn |
| 1236 | (setq forms-number-of-fields (1+ forms-number-of-fields)) |
| 1237 | (setq start-pos (+ field-sep-length found-pos)))))))) |
| 1238 | |
| 1239 | ;; Construct default format list. |
| 1240 | (setq forms-format-list (list "Forms file \"" forms-file "\".\n\n")) |
| 1241 | (let ((i 0)) |
| 1242 | (while (<= (setq i (1+ i)) forms-number-of-fields) |
| 1243 | (setq forms-format-list |
| 1244 | (append forms-format-list |
| 1245 | (list (format "%4d: " i) i "\n")))))) |
| 1246 | \f |
| 1247 | (defun forms--set-keymaps () |
| 1248 | "Set the keymaps used in this mode." |
| 1249 | |
| 1250 | (use-local-map (if forms-read-only |
| 1251 | forms-mode-ro-map |
| 1252 | forms-mode-edit-map))) |
| 1253 | |
| 1254 | (defun forms--mode-commands () |
| 1255 | "Fill the Forms mode keymaps." |
| 1256 | |
| 1257 | ;; `forms-mode-map' is always accessible via \C-c prefix. |
| 1258 | (setq forms-mode-map (make-keymap)) |
| 1259 | (define-key forms-mode-map "\t" 'forms-next-field) |
| 1260 | (define-key forms-mode-map "\C-k" 'forms-delete-record) |
| 1261 | (define-key forms-mode-map "\C-q" 'forms-toggle-read-only) |
| 1262 | (define-key forms-mode-map "\C-o" 'forms-insert-record) |
| 1263 | (define-key forms-mode-map "\C-l" 'forms-jump-record) |
| 1264 | (define-key forms-mode-map "\C-n" 'forms-next-record) |
| 1265 | (define-key forms-mode-map "\C-p" 'forms-prev-record) |
| 1266 | (define-key forms-mode-map "\C-r" 'forms-search-backward) |
| 1267 | (define-key forms-mode-map "\C-s" 'forms-search-forward) |
| 1268 | (define-key forms-mode-map "\C-x" 'forms-exit) |
| 1269 | (define-key forms-mode-map "<" 'forms-first-record) |
| 1270 | (define-key forms-mode-map ">" 'forms-last-record) |
| 1271 | (define-key forms-mode-map "\C-?" 'forms-prev-record) |
| 1272 | |
| 1273 | ;; `forms-mode-ro-map' replaces the local map when in read-only mode. |
| 1274 | (setq forms-mode-ro-map (make-keymap)) |
| 1275 | (suppress-keymap forms-mode-ro-map) |
| 1276 | (define-key forms-mode-ro-map "\C-c" forms-mode-map) |
| 1277 | (define-key forms-mode-ro-map "q" 'forms-toggle-read-only) |
| 1278 | (define-key forms-mode-ro-map "l" 'forms-jump-record) |
| 1279 | (define-key forms-mode-ro-map "n" 'forms-next-record) |
| 1280 | (define-key forms-mode-ro-map "p" 'forms-prev-record) |
| 1281 | (define-key forms-mode-ro-map "r" 'forms-search-backward) |
| 1282 | (define-key forms-mode-ro-map "s" 'forms-search-forward) |
| 1283 | (define-key forms-mode-ro-map "x" 'forms-exit) |
| 1284 | (define-key forms-mode-ro-map "<" 'forms-first-record) |
| 1285 | (define-key forms-mode-ro-map ">" 'forms-last-record) |
| 1286 | (define-key forms-mode-ro-map "?" 'describe-mode) |
| 1287 | (define-key forms-mode-ro-map " " 'forms-next-record) |
| 1288 | (forms--mode-commands1 forms-mode-ro-map) |
| 1289 | (forms--mode-menu-ro forms-mode-ro-map) |
| 1290 | |
| 1291 | ;; This is the normal, local map. |
| 1292 | (setq forms-mode-edit-map (make-keymap)) |
| 1293 | (define-key forms-mode-edit-map "\C-c" forms-mode-map) |
| 1294 | (forms--mode-commands1 forms-mode-edit-map) |
| 1295 | (forms--mode-menu-edit forms-mode-edit-map) |
| 1296 | ) |
| 1297 | |
| 1298 | (defun forms--mode-menu-ro (map) |
| 1299 | ;;; Menu initialization |
| 1300 | ; (define-key map [menu-bar] (make-sparse-keymap)) |
| 1301 | (define-key map [menu-bar forms] |
| 1302 | (cons "Forms" (make-sparse-keymap "Forms"))) |
| 1303 | (define-key map [menu-bar forms menu-forms-exit] |
| 1304 | '("Exit Forms Mode" . forms-exit)) |
| 1305 | (define-key map [menu-bar forms menu-forms-sep1] |
| 1306 | '("----")) |
| 1307 | (define-key map [menu-bar forms menu-forms-save] |
| 1308 | '("Save Data" . forms-save-buffer)) |
| 1309 | (define-key map [menu-bar forms menu-forms-print] |
| 1310 | '("Print Data" . forms-print)) |
| 1311 | (define-key map [menu-bar forms menu-forms-describe] |
| 1312 | '("Describe Mode" . describe-mode)) |
| 1313 | (define-key map [menu-bar forms menu-forms-toggle-ro] |
| 1314 | '("Toggle View/Edit" . forms-toggle-read-only)) |
| 1315 | (define-key map [menu-bar forms menu-forms-jump-record] |
| 1316 | '("Jump" . forms-jump-record)) |
| 1317 | (define-key map [menu-bar forms menu-forms-search-backward] |
| 1318 | '("Search Backward" . forms-search-backward)) |
| 1319 | (define-key map [menu-bar forms menu-forms-search-forward] |
| 1320 | '("Search Forward" . forms-search-forward)) |
| 1321 | (define-key map [menu-bar forms menu-forms-delete-record] |
| 1322 | '("Delete" . forms-delete-record)) |
| 1323 | (define-key map [menu-bar forms menu-forms-insert-record] |
| 1324 | '("Insert" . forms-insert-record)) |
| 1325 | (define-key map [menu-bar forms menu-forms-sep2] |
| 1326 | '("----")) |
| 1327 | (define-key map [menu-bar forms menu-forms-last-record] |
| 1328 | '("Last Record" . forms-last-record)) |
| 1329 | (define-key map [menu-bar forms menu-forms-first-record] |
| 1330 | '("First Record" . forms-first-record)) |
| 1331 | (define-key map [menu-bar forms menu-forms-prev-record] |
| 1332 | '("Previous Record" . forms-prev-record)) |
| 1333 | (define-key map [menu-bar forms menu-forms-next-record] |
| 1334 | '("Next Record" . forms-next-record)) |
| 1335 | (define-key map [menu-bar forms menu-forms-sep3] |
| 1336 | '("----")) |
| 1337 | (define-key map [menu-bar forms menu-forms-prev-field] |
| 1338 | '("Previous Field" . forms-prev-field)) |
| 1339 | (define-key map [menu-bar forms menu-forms-next-field] |
| 1340 | '("Next Field" . forms-next-field)) |
| 1341 | (put 'forms-insert-record 'menu-enable '(not forms-read-only)) |
| 1342 | (put 'forms-delete-record 'menu-enable '(not forms-read-only)) |
| 1343 | ) |
| 1344 | (defun forms--mode-menu-edit (map) |
| 1345 | ;;; Menu initialization |
| 1346 | ; (define-key map [menu-bar] (make-sparse-keymap)) |
| 1347 | (define-key map [menu-bar forms] |
| 1348 | (cons "Forms" (make-sparse-keymap "Forms"))) |
| 1349 | (define-key map [menu-bar forms menu-forms-edit--exit] |
| 1350 | '("Exit" . forms-exit)) |
| 1351 | (define-key map [menu-bar forms menu-forms-edit-sep1] |
| 1352 | '("----")) |
| 1353 | (define-key map [menu-bar forms menu-forms-edit-save] |
| 1354 | '("Save Data" . forms-save-buffer)) |
| 1355 | (define-key map [menu-bar forms menu-forms-edit-print] |
| 1356 | '("Print Data" . forms-print)) |
| 1357 | (define-key map [menu-bar forms menu-forms-edit-describe] |
| 1358 | '("Describe Mode" . describe-mode)) |
| 1359 | (define-key map [menu-bar forms menu-forms-edit-toggle-ro] |
| 1360 | '("Toggle View/Edit" . forms-toggle-read-only)) |
| 1361 | (define-key map [menu-bar forms menu-forms-edit-jump-record] |
| 1362 | '("Jump" . forms-jump-record)) |
| 1363 | (define-key map [menu-bar forms menu-forms-edit-search-backward] |
| 1364 | '("Search Backward" . forms-search-backward)) |
| 1365 | (define-key map [menu-bar forms menu-forms-edit-search-forward] |
| 1366 | '("Search Forward" . forms-search-forward)) |
| 1367 | (define-key map [menu-bar forms menu-forms-edit-delete-record] |
| 1368 | '("Delete" . forms-delete-record)) |
| 1369 | (define-key map [menu-bar forms menu-forms-edit-insert-record] |
| 1370 | '("Insert" . forms-insert-record)) |
| 1371 | (define-key map [menu-bar forms menu-forms-edit-sep2] |
| 1372 | '("----")) |
| 1373 | (define-key map [menu-bar forms menu-forms-edit-last-record] |
| 1374 | '("Last Record" . forms-last-record)) |
| 1375 | (define-key map [menu-bar forms menu-forms-edit-first-record] |
| 1376 | '("First Record" . forms-first-record)) |
| 1377 | (define-key map [menu-bar forms menu-forms-edit-prev-record] |
| 1378 | '("Previous Record" . forms-prev-record)) |
| 1379 | (define-key map [menu-bar forms menu-forms-edit-next-record] |
| 1380 | '("Next Record" . forms-next-record)) |
| 1381 | (define-key map [menu-bar forms menu-forms-edit-sep3] |
| 1382 | '("----")) |
| 1383 | (define-key map [menu-bar forms menu-forms-edit-prev-field] |
| 1384 | '("Previous Field" . forms-prev-field)) |
| 1385 | (define-key map [menu-bar forms menu-forms-edit-next-field] |
| 1386 | '("Next Field" . forms-next-field)) |
| 1387 | (put 'forms-insert-record 'menu-enable '(not forms-read-only)) |
| 1388 | (put 'forms-delete-record 'menu-enable '(not forms-read-only)) |
| 1389 | ) |
| 1390 | |
| 1391 | (defun forms--mode-commands1 (map) |
| 1392 | "Helper routine to define keys." |
| 1393 | (define-key map "\t" 'forms-next-field) |
| 1394 | (define-key map [S-tab] 'forms-prev-field) |
| 1395 | (define-key map [next] 'forms-next-record) |
| 1396 | (define-key map [prior] 'forms-prev-record) |
| 1397 | (define-key map [begin] 'forms-first-record) |
| 1398 | (define-key map [last] 'forms-last-record) |
| 1399 | (define-key map [backtab] 'forms-prev-field) |
| 1400 | ) |
| 1401 | \f |
| 1402 | ;;; Changed functions |
| 1403 | |
| 1404 | (defun forms--change-commands () |
| 1405 | "Localize some commands for Forms mode." |
| 1406 | |
| 1407 | ;; scroll-down -> forms-prev-record |
| 1408 | ;; scroll-up -> forms-next-record |
| 1409 | (if forms-forms-scroll |
| 1410 | (progn |
| 1411 | (local-set-key [remap scroll-up] 'forms-next-record) |
| 1412 | (local-set-key [remap scroll-down] 'forms-prev-record) |
| 1413 | (local-set-key [remap scroll-up-command] 'forms-next-record) |
| 1414 | (local-set-key [remap scroll-down-command] 'forms-prev-record))) |
| 1415 | ;; |
| 1416 | ;; beginning-of-buffer -> forms-first-record |
| 1417 | ;; end-of-buffer -> forms-end-record |
| 1418 | (if forms-forms-jump |
| 1419 | (progn |
| 1420 | (local-set-key [remap beginning-of-buffer] 'forms-first-record) |
| 1421 | (local-set-key [remap end-of-buffer] 'forms-last-record))) |
| 1422 | ;; |
| 1423 | ;; Save buffer |
| 1424 | (local-set-key "\C-x\C-s" 'forms-save-buffer) |
| 1425 | ;; |
| 1426 | ;; We have our own revert function - use it. |
| 1427 | (make-local-variable 'revert-buffer-function) |
| 1428 | (setq revert-buffer-function 'forms--revert-buffer) |
| 1429 | |
| 1430 | t) |
| 1431 | |
| 1432 | (defun forms--help () |
| 1433 | "Initial help for Forms mode." |
| 1434 | (message "%s" (substitute-command-keys (concat |
| 1435 | "\\[forms-next-record]:next" |
| 1436 | " \\[forms-prev-record]:prev" |
| 1437 | " \\[forms-first-record]:first" |
| 1438 | " \\[forms-last-record]:last" |
| 1439 | " \\[describe-mode]:help")))) |
| 1440 | |
| 1441 | (defun forms--trans (subj arg rep) |
| 1442 | "Translate in SUBJ all chars ARG into char REP. ARG and REP should |
| 1443 | be single-char strings." |
| 1444 | (let ((i 0) |
| 1445 | (re (regexp-quote arg)) |
| 1446 | (k (string-to-char rep))) |
| 1447 | (while (setq i (string-match re subj i)) |
| 1448 | (aset subj i k) |
| 1449 | (setq i (1+ i))))) |
| 1450 | |
| 1451 | (defun forms--exit (&optional save) |
| 1452 | "Internal exit from forms mode function." |
| 1453 | |
| 1454 | (let ((buf (buffer-name forms--file-buffer))) |
| 1455 | (forms--checkmod) |
| 1456 | (if (and save |
| 1457 | (buffer-modified-p forms--file-buffer)) |
| 1458 | (forms-save-buffer)) |
| 1459 | (with-current-buffer forms--file-buffer |
| 1460 | (delete-auto-save-file-if-necessary) |
| 1461 | (kill-buffer (current-buffer))) |
| 1462 | (if (get-buffer buf) ; not killed??? |
| 1463 | (if save |
| 1464 | (error "Problem saving buffer %s" (buffer-name buf))) |
| 1465 | (delete-auto-save-file-if-necessary) |
| 1466 | (kill-buffer (current-buffer))))) |
| 1467 | |
| 1468 | (defun forms--get-record () |
| 1469 | "Fetch the current record from the file buffer." |
| 1470 | |
| 1471 | ;; This function is executed in the context of the `forms--file-buffer'. |
| 1472 | |
| 1473 | (or (bolp) |
| 1474 | (beginning-of-line nil)) |
| 1475 | (let ((here (point))) |
| 1476 | (prog2 |
| 1477 | (end-of-line) |
| 1478 | (buffer-substring-no-properties here (point)) |
| 1479 | (goto-char here)))) |
| 1480 | |
| 1481 | (defun forms--show-record (the-record) |
| 1482 | "Format THE-RECORD and display it in the current buffer." |
| 1483 | |
| 1484 | ;; Split the-record. |
| 1485 | (let (the-result |
| 1486 | (start-pos 0) |
| 1487 | found-pos |
| 1488 | (field-sep-length (length forms-field-sep))) |
| 1489 | (if forms-multi-line |
| 1490 | (forms--trans the-record forms-multi-line "\n")) |
| 1491 | ;; Add an extra separator (makes splitting easy). |
| 1492 | (setq the-record (concat the-record forms-field-sep)) |
| 1493 | (while (setq found-pos (string-match forms-field-sep the-record start-pos)) |
| 1494 | (let ((ent (substring the-record start-pos found-pos))) |
| 1495 | (setq the-result |
| 1496 | (append the-result (list ent))) |
| 1497 | (setq start-pos (+ field-sep-length found-pos)))) |
| 1498 | (setq forms--the-record-list the-result)) |
| 1499 | |
| 1500 | (setq buffer-read-only nil) |
| 1501 | (if forms-use-text-properties |
| 1502 | (let ((inhibit-read-only t)) |
| 1503 | (set-text-properties (point-min) (point-max) nil))) |
| 1504 | (erase-buffer) |
| 1505 | |
| 1506 | ;; Verify the number of fields, extend forms--the-record-list if needed. |
| 1507 | (if (= (length forms--the-record-list) forms-number-of-fields) |
| 1508 | nil |
| 1509 | (if (null forms-check-number-of-fields) |
| 1510 | nil |
| 1511 | (message "Warning: this record has %d fields instead of %d" |
| 1512 | (length forms--the-record-list) forms-number-of-fields)) |
| 1513 | (if (< (length forms--the-record-list) forms-number-of-fields) |
| 1514 | (setq forms--the-record-list |
| 1515 | (append forms--the-record-list |
| 1516 | (make-list |
| 1517 | (- forms-number-of-fields |
| 1518 | (length forms--the-record-list)) |
| 1519 | ""))))) |
| 1520 | |
| 1521 | ;; Call the formatter function. |
| 1522 | (setq forms-fields (append (list nil) forms--the-record-list nil)) |
| 1523 | (funcall forms--format forms--the-record-list) |
| 1524 | |
| 1525 | ;; Prepare. |
| 1526 | (goto-char (point-min)) |
| 1527 | (set-buffer-modified-p nil) |
| 1528 | (setq buffer-read-only forms-read-only) |
| 1529 | (setq mode-line-process |
| 1530 | (concat " " (int-to-string forms--current-record) |
| 1531 | "/" (int-to-string forms--total-records)))) |
| 1532 | |
| 1533 | (defun forms--parse-form () |
| 1534 | "Parse contents of form into list of strings." |
| 1535 | ;; The contents of the form are parsed, and a new list of strings |
| 1536 | ;; is constructed. |
| 1537 | ;; A vector with the strings from the original record is |
| 1538 | ;; constructed, which is updated with the new contents. Therefore |
| 1539 | ;; fields which were not in the form are not modified. |
| 1540 | ;; Finally, the vector is transformed into a list for further processing. |
| 1541 | |
| 1542 | (let (forms--recordv) |
| 1543 | |
| 1544 | ;; Build the vector. |
| 1545 | (setq forms--recordv (vconcat forms--the-record-list)) |
| 1546 | |
| 1547 | ;; Parse the form and update the vector. |
| 1548 | (let ((forms--dynamic-text forms--dynamic-text)) |
| 1549 | (funcall forms--parser)) |
| 1550 | |
| 1551 | (if forms-modified-record-filter |
| 1552 | ;; As a service to the user, we add a zeroth element so she |
| 1553 | ;; can use the same indices as in the forms definition. |
| 1554 | (let ((the-fields (vconcat [nil] forms--recordv))) |
| 1555 | (setq the-fields (funcall forms-modified-record-filter the-fields)) |
| 1556 | (cdr (append the-fields nil))) |
| 1557 | |
| 1558 | ;; Transform to a list and return. |
| 1559 | (append forms--recordv nil)))) |
| 1560 | |
| 1561 | (defun forms--update () |
| 1562 | "Update current record with contents of form. |
| 1563 | As a side effect: sets `forms--the-record-list'." |
| 1564 | |
| 1565 | (if forms-read-only |
| 1566 | (error "Buffer is read-only")) |
| 1567 | |
| 1568 | (let (the-record) |
| 1569 | ;; Build new record. |
| 1570 | (setq forms--the-record-list (forms--parse-form)) |
| 1571 | (setq the-record |
| 1572 | (mapconcat #'identity forms--the-record-list forms-field-sep)) |
| 1573 | |
| 1574 | (if (string-match-p (regexp-quote forms-field-sep) |
| 1575 | (mapconcat #'identity forms--the-record-list "")) |
| 1576 | (error "Field separator occurs in record - update refused")) |
| 1577 | |
| 1578 | ;; Handle multi-line fields, if allowed. |
| 1579 | (if forms-multi-line |
| 1580 | (forms--trans the-record "\n" forms-multi-line)) |
| 1581 | |
| 1582 | ;; A final sanity check before updating. |
| 1583 | (if (string-match-p "\n" the-record) |
| 1584 | (error "Multi-line fields in this record - update refused")) |
| 1585 | |
| 1586 | (with-current-buffer forms--file-buffer |
| 1587 | ;; Use delete-region instead of kill-region, to avoid |
| 1588 | ;; adding junk to the kill-ring. |
| 1589 | (delete-region (line-beginning-position) (line-end-position)) |
| 1590 | (insert the-record) |
| 1591 | (beginning-of-line)))) |
| 1592 | |
| 1593 | (defun forms--checkmod () |
| 1594 | "Check if this form has been modified, and call forms--update if so." |
| 1595 | (if (buffer-modified-p nil) |
| 1596 | (let ((here (point))) |
| 1597 | (forms--update) |
| 1598 | (set-buffer-modified-p nil) |
| 1599 | (goto-char here)))) |
| 1600 | \f |
| 1601 | ;;; Start and exit |
| 1602 | |
| 1603 | ;;;###autoload |
| 1604 | (defun forms-find-file (fn) |
| 1605 | "Visit a file in Forms mode." |
| 1606 | (interactive "fForms file: ") |
| 1607 | (let ((enable-local-eval t) |
| 1608 | (enable-local-variables t)) |
| 1609 | (find-file-read-only fn) |
| 1610 | (or forms--mode-setup (forms-mode t)))) |
| 1611 | |
| 1612 | ;;;###autoload |
| 1613 | (defun forms-find-file-other-window (fn) |
| 1614 | "Visit a file in Forms mode in other window." |
| 1615 | (interactive "fFbrowse file in other window: ") |
| 1616 | (let ((enable-local-eval t) |
| 1617 | (enable-local-variables t)) |
| 1618 | (find-file-other-window fn) |
| 1619 | (or forms--mode-setup (forms-mode t)))) |
| 1620 | |
| 1621 | (defun forms-exit () |
| 1622 | "Normal exit from Forms mode. Modified buffers are saved." |
| 1623 | (interactive) |
| 1624 | (forms--exit t)) |
| 1625 | |
| 1626 | (defun forms-exit-no-save () |
| 1627 | "Exit from Forms mode without saving buffers." |
| 1628 | (interactive) |
| 1629 | (forms--exit nil)) |
| 1630 | \f |
| 1631 | ;;; Navigating commands |
| 1632 | |
| 1633 | (defun forms-next-record (arg) |
| 1634 | "Advance to the ARGth following record." |
| 1635 | (interactive "P") |
| 1636 | (forms-jump-record (+ forms--current-record (prefix-numeric-value arg)) t)) |
| 1637 | |
| 1638 | (defun forms-prev-record (arg) |
| 1639 | "Advance to the ARGth previous record." |
| 1640 | (interactive "P") |
| 1641 | (forms-jump-record (- forms--current-record (prefix-numeric-value arg)) t)) |
| 1642 | |
| 1643 | (defun forms--goto-record (rn &optional current) |
| 1644 | "Goto record number RN. |
| 1645 | If CURRENT is provided, it specifies the current record and can be used |
| 1646 | to speed up access to RN. Returns the number of records missing, if any." |
| 1647 | (if current |
| 1648 | (forward-line (- rn current)) |
| 1649 | ;; goto-line does not do what we want when the buffer is narrowed. |
| 1650 | (goto-char (point-min)) |
| 1651 | (forward-line (1- rn)))) |
| 1652 | |
| 1653 | (defun forms-jump-record (arg &optional relative) |
| 1654 | "Jump to a random record." |
| 1655 | (interactive "NRecord number: ") |
| 1656 | |
| 1657 | ;; Verify that the record number is within range. |
| 1658 | (if (or (> arg forms--total-records) |
| 1659 | (<= arg 0)) |
| 1660 | (error |
| 1661 | ;; Don't give the message if just paging. |
| 1662 | (if (not relative) |
| 1663 | (message "Record number %d out of range 1..%d" |
| 1664 | arg forms--total-records) |
| 1665 | ""))) |
| 1666 | |
| 1667 | ;; Flush. |
| 1668 | (forms--checkmod) |
| 1669 | |
| 1670 | ;; Calculate displacement. |
| 1671 | (let ((cur forms--current-record)) |
| 1672 | |
| 1673 | ;; `forms--show-record' needs it now. |
| 1674 | (setq forms--current-record arg) |
| 1675 | |
| 1676 | ;; Get the record and show it. |
| 1677 | (forms--show-record |
| 1678 | (with-current-buffer forms--file-buffer |
| 1679 | (beginning-of-line) |
| 1680 | |
| 1681 | ;; Move, and adjust the amount if needed (shouldn't happen). |
| 1682 | (setq cur (- arg (forms--goto-record arg (if relative cur)))) |
| 1683 | |
| 1684 | (forms--get-record))) |
| 1685 | |
| 1686 | ;; This shouldn't happen. |
| 1687 | (if (/= forms--current-record cur) |
| 1688 | (progn |
| 1689 | (setq forms--current-record cur) |
| 1690 | (error "Stuck at record %d" cur))))) |
| 1691 | |
| 1692 | (defun forms-first-record () |
| 1693 | "Jump to first record." |
| 1694 | (interactive) |
| 1695 | (forms-jump-record 1)) |
| 1696 | |
| 1697 | (defun forms-last-record () |
| 1698 | "Jump to last record. |
| 1699 | As a side effect: re-calculates the number of records in the data file." |
| 1700 | (interactive) |
| 1701 | (let |
| 1702 | ((numrec |
| 1703 | (with-current-buffer forms--file-buffer |
| 1704 | (count-lines (point-min) (point-max))))) |
| 1705 | (if (= numrec forms--total-records) |
| 1706 | nil |
| 1707 | (setq forms--total-records numrec) |
| 1708 | (message "Warning: number of records changed to %d" forms--total-records))) |
| 1709 | (forms-jump-record forms--total-records)) |
| 1710 | \f |
| 1711 | ;;; Other commands |
| 1712 | |
| 1713 | (defun forms-toggle-read-only (arg) |
| 1714 | "Toggles read-only mode of a forms mode buffer. |
| 1715 | With an argument, enables read-only mode if the argument is positive. |
| 1716 | Otherwise enables edit mode if the visited file is writable." |
| 1717 | |
| 1718 | (interactive "P") |
| 1719 | |
| 1720 | (if (if arg |
| 1721 | ;; Negative arg means switch it off. |
| 1722 | (<= (prefix-numeric-value arg) 0) |
| 1723 | ;; No arg means toggle. |
| 1724 | forms-read-only) |
| 1725 | |
| 1726 | ;; Enable edit mode, if possible. |
| 1727 | (let ((ro forms-read-only)) |
| 1728 | (if (with-current-buffer forms--file-buffer |
| 1729 | buffer-read-only) |
| 1730 | (progn |
| 1731 | (setq forms-read-only t) |
| 1732 | (message "No write access to `%s'" forms-file)) |
| 1733 | (setq forms-read-only nil)) |
| 1734 | (if (equal ro forms-read-only) |
| 1735 | nil |
| 1736 | (forms-mode))) |
| 1737 | |
| 1738 | ;; Enable view mode. |
| 1739 | (if forms-read-only |
| 1740 | nil |
| 1741 | (forms--checkmod) ; sync |
| 1742 | (setq forms-read-only t) |
| 1743 | (forms-mode)))) |
| 1744 | |
| 1745 | ;; Sample: |
| 1746 | ;; (defun my-new-record-filter (the-fields) |
| 1747 | ;; ;; numbers are relative to 1 |
| 1748 | ;; (aset the-fields 4 (current-time-string)) |
| 1749 | ;; (aset the-fields 6 (user-login-name)) |
| 1750 | ;; the-list) |
| 1751 | ;; (setq forms-new-record-filter 'my-new-record-filter) |
| 1752 | |
| 1753 | (defun forms-insert-record (arg) |
| 1754 | "Create a new record before the current one. |
| 1755 | With ARG: store the record after the current one. |
| 1756 | If `forms-new-record-filter' contains the name of a function, |
| 1757 | it is called to fill (some of) the fields with default values. |
| 1758 | If `forms-insert-after is non-nil, the default behavior is to insert |
| 1759 | after the current record." |
| 1760 | |
| 1761 | (interactive "P") |
| 1762 | |
| 1763 | (if forms-read-only |
| 1764 | (error "")) |
| 1765 | |
| 1766 | (let (ln the-list the-record) |
| 1767 | |
| 1768 | (if (or (and arg forms-insert-after) |
| 1769 | (and (not arg) (not forms-insert-after))) |
| 1770 | (setq ln forms--current-record) |
| 1771 | (setq ln (1+ forms--current-record))) |
| 1772 | |
| 1773 | (forms--checkmod) |
| 1774 | (if forms-new-record-filter |
| 1775 | ;; As a service to the user, we add a zeroth element so she |
| 1776 | ;; can use the same indices as in the forms definition. |
| 1777 | (let ((the-fields (make-vector (1+ forms-number-of-fields) ""))) |
| 1778 | (setq the-fields (funcall forms-new-record-filter the-fields)) |
| 1779 | (setq the-list (cdr (append the-fields nil)))) |
| 1780 | (setq the-list (make-list forms-number-of-fields ""))) |
| 1781 | |
| 1782 | (setq the-record (mapconcat #'identity the-list forms-field-sep)) |
| 1783 | |
| 1784 | (with-current-buffer forms--file-buffer |
| 1785 | (forms--goto-record ln) |
| 1786 | (open-line 1) |
| 1787 | (insert the-record) |
| 1788 | (beginning-of-line)) |
| 1789 | |
| 1790 | (setq forms--current-record ln)) |
| 1791 | |
| 1792 | (setq forms--total-records (1+ forms--total-records)) |
| 1793 | (forms-jump-record forms--current-record)) |
| 1794 | |
| 1795 | (defun forms-delete-record (arg) |
| 1796 | "Deletes a record. With a prefix argument: don't ask." |
| 1797 | (interactive "P") |
| 1798 | |
| 1799 | (if forms-read-only |
| 1800 | (error "")) |
| 1801 | |
| 1802 | (forms--checkmod) |
| 1803 | (if (or arg |
| 1804 | (y-or-n-p "Really delete this record? ")) |
| 1805 | (let ((ln forms--current-record)) |
| 1806 | (with-current-buffer forms--file-buffer |
| 1807 | (forms--goto-record ln) |
| 1808 | ;; Use delete-region instead of kill-region, to avoid |
| 1809 | ;; adding junk to the kill-ring. |
| 1810 | (delete-region (progn (beginning-of-line) (point)) |
| 1811 | (progn (beginning-of-line 2) (point)))) |
| 1812 | (setq forms--total-records (1- forms--total-records)) |
| 1813 | (if (> forms--current-record forms--total-records) |
| 1814 | (setq forms--current-record forms--total-records)) |
| 1815 | (forms-jump-record forms--current-record))) |
| 1816 | (message "")) |
| 1817 | |
| 1818 | (defun forms-search-forward (regexp) |
| 1819 | "Search forward for record containing REGEXP." |
| 1820 | (interactive |
| 1821 | (list (read-string (concat "Search forward for" |
| 1822 | (if forms--search-regexp |
| 1823 | (concat " (" |
| 1824 | forms--search-regexp |
| 1825 | ")")) |
| 1826 | ": ")))) |
| 1827 | (if (equal "" regexp) |
| 1828 | (setq regexp forms--search-regexp)) |
| 1829 | (forms--checkmod) |
| 1830 | |
| 1831 | (let (the-line the-record here) |
| 1832 | (with-current-buffer forms--file-buffer |
| 1833 | (end-of-line) |
| 1834 | (setq here (point)) |
| 1835 | (if (or (re-search-forward regexp nil t) |
| 1836 | (and (> here (point-min)) |
| 1837 | (progn |
| 1838 | (goto-char (point-min)) |
| 1839 | (re-search-forward regexp here t)))) |
| 1840 | (progn |
| 1841 | (setq the-record (forms--get-record)) |
| 1842 | (setq the-line (1+ (count-lines (point-min) (point)))) |
| 1843 | (if (< (point) here) |
| 1844 | (message "Wrapped"))) |
| 1845 | (goto-char here) |
| 1846 | (error "Search failed: %s" regexp))) |
| 1847 | (setq forms--current-record the-line) |
| 1848 | (forms--show-record the-record)) |
| 1849 | (re-search-forward regexp nil t) |
| 1850 | (setq forms--search-regexp regexp)) |
| 1851 | |
| 1852 | (defun forms-search-backward (regexp) |
| 1853 | "Search backward for record containing REGEXP." |
| 1854 | (interactive |
| 1855 | (list (read-string (concat "Search backward for" |
| 1856 | (if forms--search-regexp |
| 1857 | (concat " (" |
| 1858 | forms--search-regexp |
| 1859 | ")")) |
| 1860 | ": ")))) |
| 1861 | (if (equal "" regexp) |
| 1862 | (setq regexp forms--search-regexp)) |
| 1863 | (forms--checkmod) |
| 1864 | |
| 1865 | (let (the-line the-record here) |
| 1866 | (with-current-buffer forms--file-buffer |
| 1867 | (beginning-of-line) |
| 1868 | (setq here (point)) |
| 1869 | (if (or (re-search-backward regexp nil t) |
| 1870 | (and (< (point) (point-max)) |
| 1871 | (progn |
| 1872 | (goto-char (point-max)) |
| 1873 | (re-search-backward regexp here t)))) |
| 1874 | (progn |
| 1875 | (setq the-record (forms--get-record)) |
| 1876 | (setq the-line (1+ (count-lines (point-min) (point)))) |
| 1877 | (if (> (point) here) |
| 1878 | (message "Wrapped"))) |
| 1879 | (goto-char here) |
| 1880 | (error "Search failed: %s" regexp))) |
| 1881 | (setq forms--current-record the-line) |
| 1882 | (forms--show-record the-record)) |
| 1883 | (re-search-forward regexp nil t) |
| 1884 | (setq forms--search-regexp regexp)) |
| 1885 | |
| 1886 | (defun forms-save-buffer (&optional args) |
| 1887 | "Forms mode replacement for save-buffer. |
| 1888 | It saves the data buffer instead of the forms buffer. |
| 1889 | Calls `forms-write-file-filter' before, and `forms-read-file-filter' |
| 1890 | after writing out the data." |
| 1891 | (interactive "p") |
| 1892 | (forms--checkmod) |
| 1893 | (let ((write-file-filter forms-write-file-filter) |
| 1894 | (read-file-filter forms-read-file-filter) |
| 1895 | (cur forms--current-record)) |
| 1896 | (with-current-buffer forms--file-buffer |
| 1897 | (let ((inhibit-read-only t)) |
| 1898 | ;; Write file hooks are run via write-file-functions. |
| 1899 | ;; (if write-file-filter |
| 1900 | ;; (save-excursion |
| 1901 | ;; (run-hooks 'write-file-filter))) |
| 1902 | |
| 1903 | ;; If they have a write-file-filter, force the buffer to be |
| 1904 | ;; saved even if it doesn't seem to be changed. First, they |
| 1905 | ;; might have changed the write-file-filter; and second, if |
| 1906 | ;; save-buffer does nothing, write-file-filter won't get run, |
| 1907 | ;; and then read-file-filter will be mightily confused. |
| 1908 | (or (null write-file-filter) |
| 1909 | (set-buffer-modified-p t)) |
| 1910 | (save-buffer args) |
| 1911 | (if read-file-filter |
| 1912 | (save-excursion |
| 1913 | (run-hooks 'read-file-filter))) |
| 1914 | (set-buffer-modified-p nil))) |
| 1915 | ;; Make sure we end up with the same record number as we started. |
| 1916 | ;; Since read-file-filter may perform arbitrary transformations on |
| 1917 | ;; the data buffer contents, save-excursion is not enough. |
| 1918 | (forms-jump-record cur)) |
| 1919 | t) |
| 1920 | |
| 1921 | (defun forms--revert-buffer (&optional _arg noconfirm) |
| 1922 | "Reverts current form to un-modified." |
| 1923 | (interactive "P") |
| 1924 | (if (or noconfirm |
| 1925 | (yes-or-no-p "Revert form to unmodified? ")) |
| 1926 | (progn |
| 1927 | (set-buffer-modified-p nil) |
| 1928 | (forms-jump-record forms--current-record)))) |
| 1929 | |
| 1930 | (defun forms-next-field (arg) |
| 1931 | "Jump to ARG-th next field." |
| 1932 | (interactive "p") |
| 1933 | |
| 1934 | (let ((i 0) |
| 1935 | (here (point)) |
| 1936 | there |
| 1937 | (cnt 0) |
| 1938 | (inhibit-point-motion-hooks t)) |
| 1939 | |
| 1940 | (if (zerop arg) |
| 1941 | (setq cnt 1) |
| 1942 | (setq cnt (+ cnt arg))) |
| 1943 | |
| 1944 | (if (catch 'done |
| 1945 | (while (< i (length forms--markers)) |
| 1946 | (if (or (null (setq there (aref forms--markers i))) |
| 1947 | (<= there here)) |
| 1948 | nil |
| 1949 | (if (<= (setq cnt (1- cnt)) 0) |
| 1950 | (progn |
| 1951 | (goto-char there) |
| 1952 | (throw 'done t)))) |
| 1953 | (setq i (1+ i)))) |
| 1954 | nil |
| 1955 | (goto-char (aref forms--markers 0))))) |
| 1956 | |
| 1957 | (defun forms-prev-field (arg) |
| 1958 | "Jump to ARG-th previous field." |
| 1959 | (interactive "p") |
| 1960 | |
| 1961 | (let ((i (length forms--markers)) |
| 1962 | (here (point)) |
| 1963 | there |
| 1964 | (cnt 0) |
| 1965 | (inhibit-point-motion-hooks t)) |
| 1966 | |
| 1967 | (if (zerop arg) |
| 1968 | (setq cnt 1) |
| 1969 | (setq cnt (+ cnt arg))) |
| 1970 | |
| 1971 | (if (catch 'done |
| 1972 | (while (> i 0) |
| 1973 | (setq i ( 1- i)) |
| 1974 | (if (or (null (setq there (aref forms--markers i))) |
| 1975 | (>= there here)) |
| 1976 | nil |
| 1977 | (if (<= (setq cnt (1- cnt)) 0) |
| 1978 | (progn |
| 1979 | (goto-char there) |
| 1980 | (throw 'done t)))))) |
| 1981 | nil |
| 1982 | (goto-char (aref forms--markers (1- (length forms--markers))))))) |
| 1983 | |
| 1984 | (defun forms-print () |
| 1985 | "Send the records to the printer with `print-buffer', one record per page." |
| 1986 | (interactive) |
| 1987 | (let ((inhibit-read-only t) |
| 1988 | (save-record forms--current-record) |
| 1989 | (total-nb-records forms--total-records) |
| 1990 | (nb-record 1) |
| 1991 | (record nil)) |
| 1992 | (while (<= nb-record forms--total-records) |
| 1993 | (forms-jump-record nb-record) |
| 1994 | (setq record (buffer-string)) |
| 1995 | (with-current-buffer (get-buffer-create "*forms-print*") |
| 1996 | (goto-char (buffer-end 1)) |
| 1997 | (insert record) |
| 1998 | (setq buffer-read-only nil) |
| 1999 | (if (< nb-record total-nb-records) |
| 2000 | (insert "\n\f\n"))) |
| 2001 | (setq nb-record (1+ nb-record))) |
| 2002 | (with-current-buffer "*forms-print*" |
| 2003 | (print-buffer) |
| 2004 | (set-buffer-modified-p nil) |
| 2005 | (kill-buffer (current-buffer))) |
| 2006 | (forms-jump-record save-record))) |
| 2007 | |
| 2008 | ;;; |
| 2009 | ;;; Special service |
| 2010 | ;;; |
| 2011 | (defun forms-enumerate (the-fields) |
| 2012 | "Take a quoted list of symbols, and set their values to sequential numbers. |
| 2013 | The first symbol gets number 1, the second 2 and so on. |
| 2014 | It returns the highest number. |
| 2015 | |
| 2016 | Usage: (setq forms-number-of-fields |
| 2017 | (forms-enumerate |
| 2018 | '(field1 field2 field2 ...)))" |
| 2019 | |
| 2020 | (let ((the-index 0)) |
| 2021 | (while the-fields |
| 2022 | (setq the-index (1+ the-index)) |
| 2023 | (let ((el (car-safe the-fields))) |
| 2024 | (setq the-fields (cdr-safe the-fields)) |
| 2025 | (set el the-index))) |
| 2026 | the-index)) |
| 2027 | \f |
| 2028 | ;;; Debugging |
| 2029 | |
| 2030 | (defcustom forms--debug nil |
| 2031 | "If non-nil, enable Forms mode debugging." |
| 2032 | :type 'boolean |
| 2033 | :group 'forms) |
| 2034 | |
| 2035 | (defun forms--debug (&rest args) |
| 2036 | "Internal debugging routine." |
| 2037 | (if forms--debug |
| 2038 | (let ((ret nil)) |
| 2039 | (while args |
| 2040 | (let ((el (car-safe args))) |
| 2041 | (setq args (cdr-safe args)) |
| 2042 | (if (stringp el) |
| 2043 | (setq ret (concat ret el)) |
| 2044 | (setq ret (concat ret (prin1-to-string el) " = ")) |
| 2045 | (if (boundp el) |
| 2046 | (let ((vel (eval el))) |
| 2047 | (setq ret (concat ret (prin1-to-string vel) "\n"))) |
| 2048 | (setq ret (concat ret "<unbound>" "\n"))) |
| 2049 | (if (fboundp el) |
| 2050 | (setq ret (concat ret (prin1-to-string (symbol-function el)) |
| 2051 | "\n")))))) |
| 2052 | (with-current-buffer (get-buffer-create "*forms-mode debug*") |
| 2053 | (if (zerop (buffer-size)) |
| 2054 | (emacs-lisp-mode)) |
| 2055 | (goto-char (point-max)) |
| 2056 | (insert ret))))) |
| 2057 | |
| 2058 | ;;; forms.el ends here |