HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| b532d575 | 1 | ;;; diff-mode.el --- a mode for viewing/editing context diffs |
| 610a6418 | 2 | |
| 0d30b337 TTN |
3 | ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | ;; 2005 Free Software Foundation, Inc. | |
| 610a6418 SM |
5 | |
| 6 | ;; Author: Stefan Monnier <monnier@cs.yale.edu> | |
| b532d575 | 7 | ;; Keywords: convenience patch diff |
| 610a6418 SM |
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 2, or (at your option) | |
| 14 | ;; 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; see the file COPYING. If not, write to the | |
| 086add15 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 24 | ;; Boston, MA 02110-1301, USA. | |
| 610a6418 SM |
25 | |
| 26 | ;;; Commentary: | |
| 27 | ||
| cdbb79c1 | 28 | ;; Provides support for font-lock, outline, navigation |
| 610a6418 SM |
29 | ;; commands, editing and various conversions as well as jumping |
| 30 | ;; to the corresponding source file. | |
| 31 | ||
| 3ccdb14e | 32 | ;; Inspired by Pavel Machek's patch-mode.el (<pavel@@atrey.karlin.mff.cuni.cz>) |
| b532d575 | 33 | ;; Some efforts were spent to have it somewhat compatible with XEmacs' |
| 610a6418 SM |
34 | ;; diff-mode as well as with compilation-minor-mode |
| 35 | ||
| 610a6418 SM |
36 | ;; Bugs: |
| 37 | ||
| 027ac3f8 | 38 | ;; - Reverse doesn't work with normal diffs. |
| 610a6418 SM |
39 | |
| 40 | ;; Todo: | |
| 41 | ||
| 22cd1973 SM |
42 | ;; - Add a `delete-after-apply' so C-c C-a automatically deletes hunks. |
| 43 | ;; Also allow C-c C-a to delete already-applied hunks. | |
| 44 | ;; | |
| 45 | ;; - Try `diff <file> <hunk>' to try and fuzzily discover the source location | |
| 46 | ;; of a hunk. Show then the changes between <file> and <hunk> and make it | |
| 47 | ;; possible to apply them to <file>, <hunk-src>, or <hunk-dst>. | |
| 48 | ;; Or maybe just make it into a ".rej to diff3-markers converter". | |
| 49 | ;; | |
| 50 | ;; - Refine hunk on a word-by-word basis. | |
| 51 | ;; | |
| 027ac3f8 | 52 | ;; - Handle `diff -b' output in context->unified. |
| 610a6418 SM |
53 | |
| 54 | ;;; Code: | |
| 55 | ||
| 56 | (eval-when-compile (require 'cl)) | |
| 57 | ||
| 6e0f362c JB |
58 | (defvar add-log-buffer-file-name-function) |
| 59 | ||
| 610a6418 SM |
60 | |
| 61 | (defgroup diff-mode () | |
| aa753196 | 62 | "Major mode for viewing/editing diffs." |
| ccce6558 | 63 | :version "21.1" |
| 610a6418 SM |
64 | :group 'tools |
| 65 | :group 'diff) | |
| 66 | ||
| 22cd1973 | 67 | (defcustom diff-default-read-only nil |
| 769dd0f1 SM |
68 | "If non-nil, `diff-mode' buffers default to being read-only." |
| 69 | :type 'boolean | |
| 70 | :group 'diff-mode) | |
| 71 | ||
| e8a1ed31 | 72 | (defcustom diff-jump-to-old-file nil |
| 610a6418 SM |
73 | "*Non-nil means `diff-goto-source' jumps to the old file. |
| 74 | Else, it jumps to the new file." | |
| f5307782 JB |
75 | :type 'boolean |
| 76 | :group 'diff-mode) | |
| 610a6418 | 77 | |
| e8a1ed31 | 78 | (defcustom diff-update-on-the-fly t |
| 610a6418 SM |
79 | "*Non-nil means hunk headers are kept up-to-date on-the-fly. |
| 80 | When editing a diff file, the line numbers in the hunk headers | |
| 81 | need to be kept consistent with the actual diff. This can | |
| 82 | either be done on the fly (but this sometimes interacts poorly with the | |
| 83 | undo mechanism) or whenever the file is written (can be slow | |
| 84 | when editing big diffs)." | |
| f5307782 JB |
85 | :type 'boolean |
| 86 | :group 'diff-mode) | |
| 610a6418 | 87 | |
| 00df919e MB |
88 | (defcustom diff-advance-after-apply-hunk t |
| 89 | "*Non-nil means `diff-apply-hunk' will move to the next hunk after applying." | |
| f5307782 JB |
90 | :type 'boolean |
| 91 | :group 'diff-mode) | |
| 00df919e MB |
92 | |
| 93 | ||
| 22cd1973 SM |
94 | (defcustom diff-mode-hook nil |
| 95 | "Run after setting up the `diff-mode' major mode." | |
| 96 | :type 'hook | |
| f5307782 JB |
97 | :options '(diff-delete-empty-files diff-make-unified) |
| 98 | :group 'diff-mode) | |
| 610a6418 SM |
99 | |
| 100 | (defvar diff-outline-regexp | |
| 101 | "\\([*+][*+][*+] [^0-9]\\|@@ ...\\|\\*\\*\\* [0-9].\\|--- [0-9]..\\)") | |
| 102 | ||
| cd632e57 | 103 | ;;;; |
| 610a6418 | 104 | ;;;; keymap, menu, ... |
| cd632e57 | 105 | ;;;; |
| 610a6418 | 106 | |
| d87e5627 | 107 | (easy-mmode-defmap diff-mode-shared-map |
| 027ac3f8 | 108 | '(;; From Pavel Machek's patch-mode. |
| d87e5627 SM |
109 | ("n" . diff-hunk-next) |
| 110 | ("N" . diff-file-next) | |
| 111 | ("p" . diff-hunk-prev) | |
| 112 | ("P" . diff-file-prev) | |
| 113 | ("k" . diff-hunk-kill) | |
| 114 | ("K" . diff-file-kill) | |
| 027ac3f8 | 115 | ;; From compilation-minor-mode. |
| d87e5627 SM |
116 | ("}" . diff-file-next) |
| 117 | ("{" . diff-file-prev) | |
| 610a6418 | 118 | ("\C-m" . diff-goto-source) |
| a1e2d7f7 | 119 | ([mouse-2] . diff-goto-source) |
| 027ac3f8 | 120 | ;; From XEmacs' diff-mode. |
| 610a6418 SM |
121 | ("W" . widen) |
| 122 | ;;("." . diff-goto-source) ;display-buffer | |
| 123 | ;;("f" . diff-goto-source) ;find-file | |
| 124 | ("o" . diff-goto-source) ;other-window | |
| 125 | ;;("w" . diff-goto-source) ;other-frame | |
| 126 | ;;("N" . diff-narrow) | |
| 127 | ;;("h" . diff-show-header) | |
| 128 | ;;("j" . diff-show-difference) ;jump to Nth diff | |
| 129 | ;;("q" . diff-quit) | |
| 130 | (" " . scroll-up) | |
| 131 | ("\177" . scroll-down) | |
| 027ac3f8 | 132 | ;; Our very own bindings. |
| 610a6418 SM |
133 | ("A" . diff-ediff-patch) |
| 134 | ("r" . diff-restrict-view) | |
| 135 | ("R" . diff-reverse-direction) | |
| 136 | ("U" . diff-context->unified) | |
| c010ecfa BR |
137 | ("C" . diff-unified->context) |
| 138 | ("q" . quit-window)) | |
| 0b82e382 | 139 | "Basic keymap for `diff-mode', bound to various prefix keys.") |
| 610a6418 | 140 | |
| d87e5627 | 141 | (easy-mmode-defmap diff-mode-map |
| 610a6418 | 142 | `(("\e" . ,diff-mode-shared-map) |
| 027ac3f8 SM |
143 | ;; From compilation-minor-mode. |
| 144 | ("\C-c\C-c" . diff-goto-source) | |
| 145 | ;; Misc operations. | |
| 22cd1973 | 146 | ("\C-c\C-r" . diff-refine-hunk) |
| cd632e57 | 147 | ("\C-c\C-s" . diff-split-hunk) |
| 3cec9c57 | 148 | ("\C-c\C-a" . diff-apply-hunk) |
| b711788a | 149 | ("\C-c\C-t" . diff-test-hunk) |
| 677c0382 | 150 | ("\C-c\C-f" . next-error-follow-minor-mode)) |
| 610a6418 SM |
151 | "Keymap for `diff-mode'. See also `diff-mode-shared-map'.") |
| 152 | ||
| 153 | (easy-menu-define diff-mode-menu diff-mode-map | |
| 154 | "Menu for `diff-mode'." | |
| 155 | '("Diff" | |
| 156 | ["Jump to Source" diff-goto-source t] | |
| cd632e57 SM |
157 | ["Apply hunk" diff-apply-hunk t] |
| 158 | ["Apply diff with Ediff" diff-ediff-patch t] | |
| 610a6418 SM |
159 | ["-----" nil nil] |
| 160 | ["Reverse direction" diff-reverse-direction t] | |
| 161 | ["Context -> Unified" diff-context->unified t] | |
| 162 | ["Unified -> Context" diff-unified->context t] | |
| 163 | ;;["Fixup Headers" diff-fixup-modifs (not buffer-read-only)] | |
| 164 | )) | |
| 165 | ||
| 3cec9c57 | 166 | (defcustom diff-minor-mode-prefix "\C-c=" |
| 0b82e382 | 167 | "Prefix key for `diff-minor-mode' commands." |
| f5307782 JB |
168 | :type '(choice (string "\e") (string "C-c=") string) |
| 169 | :group 'diff-mode) | |
| 0b82e382 | 170 | |
| d87e5627 SM |
171 | (easy-mmode-defmap diff-minor-mode-map |
| 172 | `((,diff-minor-mode-prefix . ,diff-mode-shared-map)) | |
| 0b82e382 SM |
173 | "Keymap for `diff-minor-mode'. See also `diff-mode-shared-map'.") |
| 174 | ||
| 610a6418 | 175 | |
| cd632e57 | 176 | ;;;; |
| 610a6418 | 177 | ;;;; font-lock support |
| cd632e57 | 178 | ;;;; |
| 610a6418 | 179 | |
| 221711eb | 180 | (defface diff-header |
| 55f2eb7e | 181 | '((((class color) (min-colors 88) (background light)) |
| 4f815065 | 182 | :background "grey85") |
| 55f2eb7e | 183 | (((class color) (min-colors 88) (background dark)) |
| 4f815065 | 184 | :background "grey45") |
| 55f2eb7e | 185 | (((class color) (background light)) |
| 4f815065 | 186 | :foreground "blue1" :weight bold) |
| 55f2eb7e | 187 | (((class color) (background dark)) |
| 4f815065 SM |
188 | :foreground "green" :weight bold) |
| 189 | (t :weight bold)) | |
| d676819e LK |
190 | "`diff-mode' face inherited by hunk and index header faces." |
| 191 | :group 'diff-mode) | |
| 221711eb MB |
192 | ;; backward-compatibility alias |
| 193 | (put 'diff-header-face 'face-alias 'diff-header) | |
| 194 | (defvar diff-header-face 'diff-header) | |
| c0aa75f7 | 195 | |
| 221711eb | 196 | (defface diff-file-header |
| 55f2eb7e | 197 | '((((class color) (min-colors 88) (background light)) |
| 4f815065 | 198 | :background "grey70" :weight bold) |
| 55f2eb7e | 199 | (((class color) (min-colors 88) (background dark)) |
| 4f815065 | 200 | :background "grey60" :weight bold) |
| 55f2eb7e | 201 | (((class color) (background light)) |
| f3abba99 | 202 | :foreground "green" :weight bold) |
| 55f2eb7e | 203 | (((class color) (background dark)) |
| 4f815065 SM |
204 | :foreground "cyan" :weight bold) |
| 205 | (t :weight bold)) ; :height 1.3 | |
| d676819e LK |
206 | "`diff-mode' face used to highlight file header lines." |
| 207 | :group 'diff-mode) | |
| 221711eb MB |
208 | ;; backward-compatibility alias |
| 209 | (put 'diff-file-header-face 'face-alias 'diff-file-header) | |
| 210 | (defvar diff-file-header-face 'diff-file-header) | |
| 610a6418 | 211 | |
| 221711eb MB |
212 | (defface diff-index |
| 213 | '((t :inherit diff-file-header)) | |
| d676819e LK |
214 | "`diff-mode' face used to highlight index header lines." |
| 215 | :group 'diff-mode) | |
| 221711eb MB |
216 | ;; backward-compatibility alias |
| 217 | (put 'diff-index-face 'face-alias 'diff-index) | |
| 218 | (defvar diff-index-face 'diff-index) | |
| 610a6418 | 219 | |
| 221711eb MB |
220 | (defface diff-hunk-header |
| 221 | '((t :inherit diff-header)) | |
| d676819e LK |
222 | "`diff-mode' face used to highlight hunk header lines." |
| 223 | :group 'diff-mode) | |
| 221711eb MB |
224 | ;; backward-compatibility alias |
| 225 | (put 'diff-hunk-header-face 'face-alias 'diff-hunk-header) | |
| 226 | (defvar diff-hunk-header-face 'diff-hunk-header) | |
| 610a6418 | 227 | |
| 221711eb MB |
228 | (defface diff-removed |
| 229 | '((t :inherit diff-changed)) | |
| d676819e LK |
230 | "`diff-mode' face used to highlight removed lines." |
| 231 | :group 'diff-mode) | |
| 221711eb MB |
232 | ;; backward-compatibility alias |
| 233 | (put 'diff-removed-face 'face-alias 'diff-removed) | |
| 234 | (defvar diff-removed-face 'diff-removed) | |
| 610a6418 | 235 | |
| 221711eb MB |
236 | (defface diff-added |
| 237 | '((t :inherit diff-changed)) | |
| d676819e LK |
238 | "`diff-mode' face used to highlight added lines." |
| 239 | :group 'diff-mode) | |
| 221711eb MB |
240 | ;; backward-compatibility alias |
| 241 | (put 'diff-added-face 'face-alias 'diff-added) | |
| 242 | (defvar diff-added-face 'diff-added) | |
| 610a6418 | 243 | |
| 221711eb | 244 | (defface diff-changed |
| 86a27a3a | 245 | '((((type tty pc) (class color) (background light)) |
| 4f815065 | 246 | :foreground "magenta" :weight bold :slant italic) |
| 86a27a3a | 247 | (((type tty pc) (class color) (background dark)) |
| 4f815065 | 248 | :foreground "yellow" :weight bold :slant italic)) |
| d676819e LK |
249 | "`diff-mode' face used to highlight changed lines." |
| 250 | :group 'diff-mode) | |
| 221711eb MB |
251 | ;; backward-compatibility alias |
| 252 | (put 'diff-changed-face 'face-alias 'diff-changed) | |
| 253 | (defvar diff-changed-face 'diff-changed) | |
| 610a6418 | 254 | |
| f3abba99 JL |
255 | (defface diff-indicator-removed |
| 256 | '((t :inherit diff-removed)) | |
| 257 | "`diff-mode' face used to highlight indicator of removed lines (-, <)." | |
| 258 | :group 'diff-mode | |
| 259 | :version "22.1") | |
| 260 | (defvar diff-indicator-removed-face 'diff-indicator-removed) | |
| 261 | ||
| 262 | (defface diff-indicator-added | |
| 263 | '((t :inherit diff-added)) | |
| 264 | "`diff-mode' face used to highlight indicator of added lines (+, >)." | |
| 265 | :group 'diff-mode | |
| 266 | :version "22.1") | |
| 267 | (defvar diff-indicator-added-face 'diff-indicator-added) | |
| 268 | ||
| 269 | (defface diff-indicator-changed | |
| 270 | '((t :inherit diff-changed)) | |
| 271 | "`diff-mode' face used to highlight indicator of changed lines." | |
| 272 | :group 'diff-mode | |
| 273 | :version "22.1") | |
| 274 | (defvar diff-indicator-changed-face 'diff-indicator-changed) | |
| 275 | ||
| 221711eb MB |
276 | (defface diff-function |
| 277 | '((t :inherit diff-context)) | |
| d676819e LK |
278 | "`diff-mode' face used to highlight function names produced by \"diff -p\"." |
| 279 | :group 'diff-mode) | |
| 221711eb MB |
280 | ;; backward-compatibility alias |
| 281 | (put 'diff-function-face 'face-alias 'diff-function) | |
| 282 | (defvar diff-function-face 'diff-function) | |
| 34460354 | 283 | |
| 221711eb | 284 | (defface diff-context |
| f3abba99 | 285 | '((((class color grayscale) (min-colors 88)) :inherit shadow)) |
| d676819e LK |
286 | "`diff-mode' face used to highlight context and other side-information." |
| 287 | :group 'diff-mode) | |
| 221711eb MB |
288 | ;; backward-compatibility alias |
| 289 | (put 'diff-context-face 'face-alias 'diff-context) | |
| 290 | (defvar diff-context-face 'diff-context) | |
| c0aa75f7 | 291 | |
| 221711eb MB |
292 | (defface diff-nonexistent |
| 293 | '((t :inherit diff-file-header)) | |
| d676819e LK |
294 | "`diff-mode' face used to highlight nonexistent files in recursive diffs." |
| 295 | :group 'diff-mode) | |
| 221711eb MB |
296 | ;; backward-compatibility alias |
| 297 | (put 'diff-nonexistent-face 'face-alias 'diff-nonexistent) | |
| 298 | (defvar diff-nonexistent-face 'diff-nonexistent) | |
| 469fc0a2 | 299 | |
| 22cd1973 SM |
300 | (defconst diff-yank-handler '(diff-yank-function)) |
| 301 | (defun diff-yank-function (text) | |
| 1ec7bd14 SM |
302 | ;; FIXME: the yank-handler is now called separately on each piece of text |
| 303 | ;; with a yank-handler property, so the next-single-property-change call | |
| 304 | ;; below will always return nil :-( --stef | |
| 22cd1973 SM |
305 | (let ((mixed (next-single-property-change 0 'yank-handler text)) |
| 306 | (start (point))) | |
| 307 | ;; First insert the text. | |
| 308 | (insert text) | |
| 309 | ;; If the text does not include any diff markers and if we're not | |
| 310 | ;; yanking back into a diff-mode buffer, get rid of the prefixes. | |
| 311 | (unless (or mixed (derived-mode-p 'diff-mode)) | |
| 312 | (undo-boundary) ; Just in case the user wanted the prefixes. | |
| 313 | (let ((re (save-excursion | |
| 314 | (if (re-search-backward "^[><!][ \t]" start t) | |
| 315 | (if (eq (char-after) ?!) | |
| 316 | "^[!+- ][ \t]" "^[<>][ \t]") | |
| 317 | "^[ <>!+-]")))) | |
| 318 | (save-excursion | |
| 319 | (while (re-search-backward re start t) | |
| 320 | (replace-match "" t t))))))) | |
| cfc80227 | 321 | |
| 22cd1973 | 322 | |
| 610a6418 | 323 | (defvar diff-font-lock-keywords |
| f3abba99 JL |
324 | `(("^\\(@@ -[0-9,]+ \\+[0-9,]+ @@\\)\\(.*\\)$" ;unified |
| 325 | (1 diff-hunk-header-face) (2 diff-function-face)) | |
| 326 | ("^\\(\\*\\{15\\}\\)\\(.*\\)$" ;context | |
| 327 | (1 diff-hunk-header-face) (2 diff-function-face)) | |
| 370d860c | 328 | ("^\\*\\*\\* .+ \\*\\*\\*\\*". diff-hunk-header-face) ;context |
| f3abba99 JL |
329 | ("^--- .+ ----$" . diff-hunk-header-face) ;context |
| 330 | ("^[0-9,]+[acd][0-9,]+$" . diff-hunk-header-face) ;normal | |
| 331 | ("^---$" . diff-hunk-header-face) ;normal | |
| a6373340 | 332 | ("^\\(---\\|\\+\\+\\+\\|\\*\\*\\*\\) \\(\\S-+\\)\\(.*[^*-]\\)?\n" |
| c0aa75f7 | 333 | (0 diff-header-face) (2 diff-file-header-face prepend)) |
| f3abba99 JL |
334 | ("^\\([-<]\\)\\(.*\n\\)" |
| 335 | (1 diff-indicator-removed-face) (2 diff-removed-face)) | |
| 336 | ("^\\([+>]\\)\\(.*\n\\)" | |
| 337 | (1 diff-indicator-added-face) (2 diff-added-face)) | |
| 338 | ("^\\(!\\)\\(.*\n\\)" | |
| 339 | (1 diff-indicator-changed-face) (2 diff-changed-face)) | |
| 340 | ("^Index: \\(.+\\).*\n" | |
| 341 | (0 diff-header-face) (1 diff-index-face prepend)) | |
| 7dfb000f | 342 | ("^Only in .*\n" . diff-nonexistent-face) |
| f3abba99 | 343 | ("^\\(#\\)\\(.*\\)" |
| 050dcc13 JL |
344 | (1 font-lock-comment-delimiter-face) |
| 345 | (2 font-lock-comment-face)) | |
| f3abba99 | 346 | ("^[^-=+*!<>#].*\n" (0 diff-context-face)))) |
| 610a6418 SM |
347 | |
| 348 | (defconst diff-font-lock-defaults | |
| 0e104800 | 349 | '(diff-font-lock-keywords t nil nil nil (font-lock-multiline . nil))) |
| 610a6418 | 350 | |
| ccce6558 DL |
351 | (defvar diff-imenu-generic-expression |
| 352 | ;; Prefer second name as first is most likely to be a backup or | |
| 824693e7 DL |
353 | ;; version-control name. The [\t\n] at the end of the unidiff pattern |
| 354 | ;; catches Debian source diff files (which lack the trailing date). | |
| 355 | '((nil "\\+\\+\\+\\ \\([^\t\n]+\\)[\t\n]" 1) ; unidiffs | |
| ccce6558 DL |
356 | (nil "^--- \\([^\t\n]+\\)\t.*\n\\*" 1))) ; context diffs |
| 357 | ||
| cd632e57 | 358 | ;;;; |
| 610a6418 | 359 | ;;;; Movement |
| cd632e57 | 360 | ;;;; |
| 610a6418 | 361 | |
| c0078a04 | 362 | (defconst diff-hunk-header-re "^\\(@@ -[0-9,]+ \\+[0-9,]+ @@.*\\|\\*\\{15\\}.*\n\\*\\*\\* .+ \\*\\*\\*\\*\\|[0-9]+\\(,[0-9]+\\)?[acd][0-9]+\\(,[0-9]+\\)?\\)$") |
| bd9d7d76 | 363 | (defconst diff-file-header-re (concat "^\\(--- .+\n\\+\\+\\+ \\|\\*\\*\\* .+\n--- \\|[^-+!<>0-9@* ]\\).+\n" (substring diff-hunk-header-re 1))) |
| 610a6418 SM |
364 | (defvar diff-narrowed-to nil) |
| 365 | ||
| 366 | (defun diff-end-of-hunk (&optional style) | |
| 996884b2 SM |
367 | (when (looking-at diff-hunk-header-re) |
| 368 | (unless style | |
| 369 | ;; Especially important for unified (because headers are ambiguous). | |
| 370 | (setq style (cdr (assq (char-after) '((?@ . unified) (?* . context)))))) | |
| 371 | (goto-char (match-end 0))) | |
| 0e104800 | 372 | (let ((end (and (re-search-forward (case style |
| 1eabc5e6 SM |
373 | ;; A `unified' header is ambiguous. |
| 374 | (unified (concat "^[^-+# \\]\\|" | |
| 375 | diff-file-header-re)) | |
| 0e104800 SM |
376 | (context "^[^-+#! \\]") |
| 377 | (normal "^[^<>#\\]") | |
| 378 | (t "^[^-+#!<> \\]")) | |
| 379 | nil t) | |
| 380 | (match-beginning 0)))) | |
| 381 | ;; The return value is used by easy-mmode-define-navigation. | |
| 382 | (goto-char (or end (point-max))))) | |
| 610a6418 SM |
383 | |
| 384 | (defun diff-beginning-of-hunk () | |
| 385 | (beginning-of-line) | |
| 386 | (unless (looking-at diff-hunk-header-re) | |
| 387 | (forward-line 1) | |
| 388 | (condition-case () | |
| 389 | (re-search-backward diff-hunk-header-re) | |
| 390 | (error (error "Can't find the beginning of the hunk"))))) | |
| 391 | ||
| 392 | (defun diff-beginning-of-file () | |
| 393 | (beginning-of-line) | |
| 394 | (unless (looking-at diff-file-header-re) | |
| 395 | (forward-line 2) | |
| 396 | (condition-case () | |
| 397 | (re-search-backward diff-file-header-re) | |
| 398 | (error (error "Can't find the beginning of the file"))))) | |
| 399 | ||
| 400 | (defun diff-end-of-file () | |
| 0e104800 | 401 | (re-search-forward "^[-+#!<>0-9@* \\]" nil t) |
| 22cd1973 SM |
402 | (re-search-forward (concat "^[^-+#!<>0-9@* \\]\\|" diff-file-header-re) |
| 403 | nil 'move) | |
| 404 | (if (match-beginning 1) | |
| 405 | (goto-char (match-beginning 1)) | |
| 406 | (beginning-of-line))) | |
| 610a6418 | 407 | |
| d87e5627 SM |
408 | ;; Define diff-{hunk,file}-{prev,next} |
| 409 | (easy-mmode-define-navigation | |
| 067b4094 | 410 | diff-hunk diff-hunk-header-re "hunk" diff-end-of-hunk diff-restrict-view) |
| d87e5627 SM |
411 | (easy-mmode-define-navigation |
| 412 | diff-file diff-file-header-re "file" diff-end-of-hunk) | |
| 610a6418 SM |
413 | |
| 414 | (defun diff-restrict-view (&optional arg) | |
| 415 | "Restrict the view to the current hunk. | |
| 416 | If the prefix ARG is given, restrict the view to the current file instead." | |
| 417 | (interactive "P") | |
| 418 | (save-excursion | |
| 419 | (if arg (diff-beginning-of-file) (diff-beginning-of-hunk)) | |
| 420 | (narrow-to-region (point) | |
| 421 | (progn (if arg (diff-end-of-file) (diff-end-of-hunk)) | |
| 422 | (point))) | |
| 423 | (set (make-local-variable 'diff-narrowed-to) (if arg 'file 'hunk)))) | |
| 424 | ||
| 425 | ||
| d87e5627 | 426 | (defun diff-hunk-kill () |
| 610a6418 SM |
427 | "Kill current hunk." |
| 428 | (interactive) | |
| 429 | (diff-beginning-of-hunk) | |
| 1eabc5e6 | 430 | (let* ((start (point)) |
| 22cd1973 SM |
431 | (nexthunk (when (re-search-forward diff-hunk-header-re nil t) |
| 432 | (match-beginning 0))) | |
| 1eabc5e6 SM |
433 | (firsthunk (ignore-errors |
| 434 | (goto-char start) | |
| 435 | (diff-beginning-of-file) (diff-hunk-next) (point))) | |
| 436 | (nextfile (ignore-errors (diff-file-next) (point)))) | |
| 437 | (goto-char start) | |
| 610a6418 SM |
438 | (if (and firsthunk (= firsthunk start) |
| 439 | (or (null nexthunk) | |
| 440 | (and nextfile (> nexthunk nextfile)))) | |
| 1eabc5e6 | 441 | ;; It's the only hunk for this file, so kill the file. |
| d87e5627 | 442 | (diff-file-kill) |
| 610a6418 SM |
443 | (diff-end-of-hunk) |
| 444 | (kill-region start (point))))) | |
| 445 | ||
| d87e5627 | 446 | (defun diff-file-kill () |
| 610a6418 SM |
447 | "Kill current file's hunks." |
| 448 | (interactive) | |
| 449 | (diff-beginning-of-file) | |
| 450 | (let* ((start (point)) | |
| 451 | (prevhunk (save-excursion | |
| 452 | (ignore-errors | |
| d87e5627 | 453 | (diff-hunk-prev) (point)))) |
| 610a6418 SM |
454 | (index (save-excursion |
| 455 | (re-search-backward "^Index: " prevhunk t)))) | |
| 456 | (when index (setq start index)) | |
| 457 | (diff-end-of-file) | |
| 22cd1973 | 458 | (if (looking-at "^\n") (forward-char 1)) ;`tla' generates such diffs. |
| 610a6418 SM |
459 | (kill-region start (point)))) |
| 460 | ||
| fef8c55b SM |
461 | (defun diff-kill-junk () |
| 462 | "Kill spurious empty diffs." | |
| 463 | (interactive) | |
| 464 | (save-excursion | |
| 465 | (let ((inhibit-read-only t)) | |
| 466 | (goto-char (point-min)) | |
| 467 | (while (re-search-forward (concat "^\\(Index: .*\n\\)" | |
| 468 | "\\([^-+!* <>].*\n\\)*?" | |
| 469 | "\\(\\(Index:\\) \\|" | |
| 470 | diff-file-header-re "\\)") | |
| 471 | nil t) | |
| 472 | (delete-region (if (match-end 4) (match-beginning 0) (match-end 1)) | |
| 473 | (match-beginning 3)) | |
| 474 | (beginning-of-line))))) | |
| 475 | ||
| cd632e57 SM |
476 | (defun diff-count-matches (re start end) |
| 477 | (save-excursion | |
| 478 | (let ((n 0)) | |
| 479 | (goto-char start) | |
| 480 | (while (re-search-forward re end t) (incf n)) | |
| 481 | n))) | |
| 482 | ||
| 483 | (defun diff-split-hunk () | |
| 484 | "Split the current (unified diff) hunk at point into two hunks." | |
| 485 | (interactive) | |
| 486 | (beginning-of-line) | |
| 487 | (let ((pos (point)) | |
| 488 | (start (progn (diff-beginning-of-hunk) (point)))) | |
| 489 | (unless (looking-at "@@ -\\([0-9]+\\),[0-9]+ \\+\\([0-9]+\\),[0-9]+ @@") | |
| 490 | (error "diff-split-hunk only works on unified context diffs")) | |
| 491 | (forward-line 1) | |
| 492 | (let* ((start1 (string-to-number (match-string 1))) | |
| 493 | (start2 (string-to-number (match-string 2))) | |
| 494 | (newstart1 (+ start1 (diff-count-matches "^[- \t]" (point) pos))) | |
| 495 | (newstart2 (+ start2 (diff-count-matches "^[+ \t]" (point) pos)))) | |
| 496 | (goto-char pos) | |
| 497 | ;; Hopefully the after-change-function will not screw us over. | |
| 498 | (insert "@@ -" (number-to-string newstart1) ",1 +" | |
| 499 | (number-to-string newstart2) ",1 @@\n") | |
| 500 | ;; Fix the original hunk-header. | |
| 501 | (diff-fixup-modifs start pos)))) | |
| 71296446 | 502 | |
| cd632e57 | 503 | |
| 610a6418 SM |
504 | ;;;; |
| 505 | ;;;; jump to other buffers | |
| 506 | ;;;; | |
| 507 | ||
| 0b82e382 SM |
508 | (defvar diff-remembered-files-alist nil) |
| 509 | ||
| 610a6418 SM |
510 | (defun diff-filename-drop-dir (file) |
| 511 | (when (string-match "/" file) (substring file (match-end 0)))) | |
| 512 | ||
| 0b82e382 SM |
513 | (defun diff-merge-strings (ancestor from to) |
| 514 | "Merge the diff between ANCESTOR and FROM into TO. | |
| 515 | Returns the merged string if successful or nil otherwise. | |
| d87e5627 | 516 | The strings are assumed not to contain any \"\\n\" (i.e. end of line). |
| 0b82e382 SM |
517 | If ANCESTOR = FROM, returns TO. |
| 518 | If ANCESTOR = TO, returns FROM. | |
| 519 | The heuristic is simplistic and only really works for cases | |
| 520 | like \(diff-merge-strings \"b/foo\" \"b/bar\" \"/a/c/foo\")." | |
| 521 | ;; Ideally, we want: | |
| 522 | ;; AMB ANB CMD -> CND | |
| 523 | ;; but that's ambiguous if `foo' or `bar' is empty: | |
| 524 | ;; a/foo a/foo1 b/foo.c -> b/foo1.c but not 1b/foo.c or b/foo.c1 | |
| d87e5627 | 525 | (let ((str (concat ancestor "\n" from "\n" to))) |
| 0b82e382 | 526 | (when (and (string-match (concat |
| d87e5627 SM |
527 | "\\`\\(.*?\\)\\(.*\\)\\(.*\\)\n" |
| 528 | "\\1\\(.*\\)\\3\n" | |
| 0b82e382 SM |
529 | "\\(.*\\(\\2\\).*\\)\\'") str) |
| 530 | (equal to (match-string 5 str))) | |
| 531 | (concat (substring str (match-beginning 5) (match-beginning 6)) | |
| 532 | (match-string 4 str) | |
| 533 | (substring str (match-end 6) (match-end 5)))))) | |
| 534 | ||
| 22cd1973 SM |
535 | (defun diff-tell-file-name (old name) |
| 536 | "Tell Emacs where the find the source file of the current hunk. | |
| 537 | If the OLD prefix arg is passed, tell the file NAME of the old file." | |
| 538 | (interactive | |
| 539 | (let* ((old current-prefix-arg) | |
| 540 | (fs (diff-hunk-file-names current-prefix-arg))) | |
| 541 | (unless fs (error "No file name to look for")) | |
| 542 | (list old (read-file-name (format "File for %s: " (car fs)) | |
| 543 | nil (diff-find-file-name old) t)))) | |
| 544 | (let ((fs (diff-hunk-file-names old))) | |
| 545 | (unless fs (error "No file name to look for")) | |
| 546 | (push (cons fs name) diff-remembered-files-alist))) | |
| cfc80227 | 547 | |
| 22cd1973 SM |
548 | (defun diff-hunk-file-names (&optional old) |
| 549 | "Give the list of file names textually mentioned for the current hunk." | |
| 610a6418 SM |
550 | (save-excursion |
| 551 | (unless (looking-at diff-file-header-re) | |
| 552 | (or (ignore-errors (diff-beginning-of-file)) | |
| 553 | (re-search-forward diff-file-header-re nil t))) | |
| 22cd1973 | 554 | (let ((limit (save-excursion |
| 610a6418 | 555 | (condition-case () |
| d87e5627 | 556 | (progn (diff-hunk-prev) (point)) |
| 610a6418 | 557 | (error (point-min))))) |
| 22cd1973 SM |
558 | (header-files |
| 559 | (if (looking-at "[-*][-*][-*] \\(\\S-+\\)\\(\\s-.*\\)?\n[-+][-+][-+] \\(\\S-+\\)") | |
| 560 | (list (if old (match-string 1) (match-string 3)) | |
| 561 | (if old (match-string 3) (match-string 1))) | |
| 562 | (forward-line 1) nil))) | |
| 563 | (delq nil | |
| 564 | (append | |
| 565 | (when (and (not old) | |
| 566 | (save-excursion | |
| 567 | (re-search-backward "^Index: \\(.+\\)" limit t))) | |
| 568 | (list (match-string 1))) | |
| 569 | header-files | |
| 570 | (when (re-search-backward | |
| 571 | "^diff \\(-\\S-+ +\\)*\\(\\S-+\\)\\( +\\(\\S-+\\)\\)?" | |
| 572 | nil t) | |
| 573 | (list (if old (match-string 2) (match-string 4)) | |
| 574 | (if old (match-string 4) (match-string 2))))))))) | |
| 575 | ||
| 576 | (defun diff-find-file-name (&optional old) | |
| 577 | "Return the file corresponding to the current patch. | |
| 578 | Non-nil OLD means that we want the old file." | |
| 579 | (save-excursion | |
| 580 | (unless (looking-at diff-file-header-re) | |
| 581 | (or (ignore-errors (diff-beginning-of-file)) | |
| 582 | (re-search-forward diff-file-header-re nil t))) | |
| 583 | (let ((fs (diff-hunk-file-names old))) | |
| 610a6418 | 584 | (or |
| 0b82e382 SM |
585 | ;; use any previously used preference |
| 586 | (cdr (assoc fs diff-remembered-files-alist)) | |
| 587 | ;; try to be clever and use previous choices as an inspiration | |
| 588 | (dolist (rf diff-remembered-files-alist) | |
| 589 | (let ((newfile (diff-merge-strings (caar rf) (car fs) (cdr rf)))) | |
| 590 | (if (and newfile (file-exists-p newfile)) (return newfile)))) | |
| 591 | ;; look for each file in turn. If none found, try again but | |
| 592 | ;; ignoring the first level of directory, ... | |
| 593 | (do* ((files fs (delq nil (mapcar 'diff-filename-drop-dir files))) | |
| 594 | (file nil nil)) | |
| 595 | ((or (null files) | |
| 596 | (setq file (do* ((files files (cdr files)) | |
| 597 | (file (car files) (car files))) | |
| 598 | ((or (null file) (file-exists-p file)) | |
| 599 | file)))) | |
| 600 | file)) | |
| 601 | ;; <foo>.rej patches implicitly apply to <foo> | |
| 610a6418 SM |
602 | (and (string-match "\\.rej\\'" (or buffer-file-name "")) |
| 603 | (let ((file (substring buffer-file-name 0 (match-beginning 0)))) | |
| 604 | (when (file-exists-p file) file))) | |
| 0b82e382 SM |
605 | ;; if all else fails, ask the user |
| 606 | (let ((file (read-file-name (format "Use file %s: " (or (first fs) "")) | |
| 607 | nil (first fs) t (first fs)))) | |
| 608 | (set (make-local-variable 'diff-remembered-files-alist) | |
| 609 | (cons (cons fs file) diff-remembered-files-alist)) | |
| 610a6418 SM |
610 | file))))) |
| 611 | ||
| 1b1b5dae | 612 | |
| 610a6418 SM |
613 | (defun diff-ediff-patch () |
| 614 | "Call `ediff-patch-file' on the current buffer." | |
| 615 | (interactive) | |
| 616 | (condition-case err | |
| 0e104800 | 617 | (ediff-patch-file nil (current-buffer)) |
| 610a6418 SM |
618 | (wrong-number-of-arguments (ediff-patch-file)))) |
| 619 | ||
| 71296446 | 620 | ;;;; |
| 610a6418 | 621 | ;;;; Conversion functions |
| 71296446 | 622 | ;;;; |
| 610a6418 SM |
623 | |
| 624 | ;;(defvar diff-inhibit-after-change nil | |
| 625 | ;; "Non-nil means inhibit `diff-mode's after-change functions.") | |
| 626 | ||
| 627 | (defun diff-unified->context (start end) | |
| 628 | "Convert unified diffs to context diffs. | |
| 629 | START and END are either taken from the region (if a prefix arg is given) or | |
| 630 | else cover the whole bufer." | |
| 631 | (interactive (if current-prefix-arg | |
| 632 | (list (mark) (point)) | |
| 633 | (list (point-min) (point-max)))) | |
| 634 | (unless (markerp end) (setq end (copy-marker end))) | |
| 635 | (let (;;(diff-inhibit-after-change t) | |
| 636 | (inhibit-read-only t)) | |
| 637 | (save-excursion | |
| 638 | (goto-char start) | |
| c0078a04 | 639 | (while (and (re-search-forward "^\\(\\(---\\) .+\n\\(\\+\\+\\+\\) .+\\|@@ -\\([0-9]+\\),\\([0-9]+\\) \\+\\([0-9]+\\),\\([0-9]+\\) @@.*\\)$" nil t) |
| 610a6418 SM |
640 | (< (point) end)) |
| 641 | (combine-after-change-calls | |
| 642 | (if (match-beginning 2) | |
| 0e104800 | 643 | ;; we matched a file header |
| 610a6418 SM |
644 | (progn |
| 645 | ;; use reverse order to make sure the indices are kept valid | |
| 646 | (replace-match "---" t t nil 3) | |
| 647 | (replace-match "***" t t nil 2)) | |
| 648 | ;; we matched a hunk header | |
| 649 | (let ((line1 (match-string 4)) | |
| 650 | (lines1 (match-string 5)) | |
| 651 | (line2 (match-string 6)) | |
| 652 | (lines2 (match-string 7))) | |
| 653 | (replace-match | |
| 654 | (concat "***************\n*** " line1 "," | |
| 655 | (number-to-string (+ (string-to-number line1) | |
| 656 | (string-to-number lines1) | |
| 657 | -1)) " ****")) | |
| 658 | (forward-line 1) | |
| 659 | (save-restriction | |
| 660 | (narrow-to-region (point) | |
| 661 | (progn (diff-end-of-hunk 'unified) (point))) | |
| 662 | (let ((hunk (buffer-string))) | |
| 663 | (goto-char (point-min)) | |
| 664 | (if (not (save-excursion (re-search-forward "^-" nil t))) | |
| 665 | (delete-region (point) (point-max)) | |
| 666 | (goto-char (point-max)) | |
| 667 | (let ((modif nil) last-pt) | |
| 668 | (while (progn (setq last-pt (point)) | |
| 669 | (= (forward-line -1) 0)) | |
| 670 | (case (char-after) | |
| bdad2e31 | 671 | (?\s (insert " ") (setq modif nil) (backward-char 1)) |
| 610a6418 SM |
672 | (?+ (delete-region (point) last-pt) (setq modif t)) |
| 673 | (?- (if (not modif) | |
| 674 | (progn (forward-char 1) | |
| 675 | (insert " ")) | |
| 676 | (delete-char 1) | |
| 677 | (insert "! ")) | |
| 678 | (backward-char 2)) | |
| 679 | (?\\ (when (save-excursion (forward-line -1) | |
| 680 | (= (char-after) ?+)) | |
| 681 | (delete-region (point) last-pt) (setq modif t))) | |
| 682 | (t (setq modif nil)))))) | |
| 683 | (goto-char (point-max)) | |
| 684 | (save-excursion | |
| 685 | (insert "--- " line2 "," | |
| 686 | (number-to-string (+ (string-to-number line2) | |
| 687 | (string-to-number lines2) | |
| 688 | -1)) " ----\n" hunk)) | |
| 689 | ;;(goto-char (point-min)) | |
| 690 | (forward-line 1) | |
| 691 | (if (not (save-excursion (re-search-forward "^+" nil t))) | |
| 692 | (delete-region (point) (point-max)) | |
| 693 | (let ((modif nil) (delete nil)) | |
| 694 | (while (not (eobp)) | |
| 695 | (case (char-after) | |
| bdad2e31 | 696 | (?\s (insert " ") (setq modif nil) (backward-char 1)) |
| 610a6418 SM |
697 | (?- (setq delete t) (setq modif t)) |
| 698 | (?+ (if (not modif) | |
| 699 | (progn (forward-char 1) | |
| 700 | (insert " ")) | |
| 701 | (delete-char 1) | |
| 702 | (insert "! ")) | |
| 703 | (backward-char 2)) | |
| 704 | (?\\ (when (save-excursion (forward-line 1) | |
| 705 | (not (eobp))) | |
| 706 | (setq delete t) (setq modif t))) | |
| 707 | (t (setq modif nil))) | |
| 708 | (let ((last-pt (point))) | |
| 709 | (forward-line 1) | |
| 710 | (when delete | |
| 711 | (delete-region last-pt (point)) | |
| 712 | (setq delete nil))))))))))))))) | |
| 713 | ||
| 714 | (defun diff-context->unified (start end) | |
| 715 | "Convert context diffs to unified diffs. | |
| 716 | START and END are either taken from the region (if a prefix arg is given) or | |
| 717 | else cover the whole bufer." | |
| 718 | (interactive (if current-prefix-arg | |
| 719 | (list (mark) (point)) | |
| 720 | (list (point-min) (point-max)))) | |
| 721 | (unless (markerp end) (setq end (copy-marker end))) | |
| 722 | (let (;;(diff-inhibit-after-change t) | |
| 723 | (inhibit-read-only t)) | |
| 724 | (save-excursion | |
| 725 | (goto-char start) | |
| c0078a04 | 726 | (while (and (re-search-forward "^\\(\\(\\*\\*\\*\\) .+\n\\(---\\) .+\\|\\*\\{15\\}.*\n\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]+\\) \\*\\*\\*\\*\\)$" nil t) |
| 610a6418 SM |
727 | (< (point) end)) |
| 728 | (combine-after-change-calls | |
| 729 | (if (match-beginning 2) | |
| 730 | ;; we matched a file header | |
| 731 | (progn | |
| 732 | ;; use reverse order to make sure the indices are kept valid | |
| 733 | (replace-match "+++" t t nil 3) | |
| 734 | (replace-match "---" t t nil 2)) | |
| 735 | ;; we matched a hunk header | |
| 736 | (let ((line1s (match-string 4)) | |
| 737 | (line1e (match-string 5)) | |
| 738 | (pt1 (match-beginning 0))) | |
| 739 | (replace-match "") | |
| 740 | (unless (re-search-forward | |
| 741 | "^--- \\([0-9]+\\),\\(-?[0-9]+\\) ----$" nil t) | |
| 742 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 743 | (let ((line2s (match-string 1)) | |
| 744 | (line2e (match-string 2)) | |
| 745 | (pt2 (progn | |
| 746 | (delete-region (progn (beginning-of-line) (point)) | |
| 747 | (progn (forward-line 1) (point))) | |
| 748 | (point-marker)))) | |
| 749 | (goto-char pt1) | |
| 750 | (forward-line 1) | |
| 751 | (while (< (point) pt2) | |
| 752 | (case (char-after) | |
| 753 | ((?! ?-) (delete-char 2) (insert "-") (forward-line 1)) | |
| aa753196 | 754 | (?\s ;merge with the other half of the chunk |
| 610a6418 SM |
755 | (let* ((endline2 |
| 756 | (save-excursion | |
| 757 | (goto-char pt2) (forward-line 1) (point))) | |
| 758 | (c (char-after pt2))) | |
| 759 | (case c | |
| 760 | ((?! ?+) | |
| 761 | (insert "+" | |
| 762 | (prog1 (buffer-substring (+ pt2 2) endline2) | |
| 763 | (delete-region pt2 endline2)))) | |
| aa753196 | 764 | (?\s ;FIXME: check consistency |
| 610a6418 SM |
765 | (delete-region pt2 endline2) |
| 766 | (delete-char 1) | |
| 767 | (forward-line 1)) | |
| 768 | (?\\ (forward-line 1)) | |
| 769 | (t (delete-char 1) (forward-line 1))))) | |
| 770 | (t (forward-line 1)))) | |
| 771 | (while (looking-at "[+! ] ") | |
| 772 | (if (/= (char-after) ?!) (forward-char 1) | |
| 773 | (delete-char 1) (insert "+")) | |
| 774 | (delete-char 1) (forward-line 1)) | |
| 775 | (save-excursion | |
| 776 | (goto-char pt1) | |
| 777 | (insert "@@ -" line1s "," | |
| 778 | (number-to-string (- (string-to-number line1e) | |
| 779 | (string-to-number line1s) | |
| 780 | -1)) | |
| 781 | " +" line2s "," | |
| 782 | (number-to-string (- (string-to-number line2e) | |
| 783 | (string-to-number line2s) | |
| 784 | -1)) " @@")))))))))) | |
| 785 | ||
| 786 | (defun diff-reverse-direction (start end) | |
| 787 | "Reverse the direction of the diffs. | |
| 788 | START and END are either taken from the region (if a prefix arg is given) or | |
| 789 | else cover the whole bufer." | |
| 790 | (interactive (if current-prefix-arg | |
| 791 | (list (mark) (point)) | |
| 792 | (list (point-min) (point-max)))) | |
| 793 | (unless (markerp end) (setq end (copy-marker end))) | |
| 794 | (let (;;(diff-inhibit-after-change t) | |
| 795 | (inhibit-read-only t)) | |
| 796 | (save-excursion | |
| 797 | (goto-char start) | |
| c0078a04 | 798 | (while (and (re-search-forward "^\\(\\([-*][-*][-*] \\)\\(.+\\)\n\\([-+][-+][-+] \\)\\(.+\\)\\|\\*\\{15\\}.*\n\\*\\*\\* \\(.+\\) \\*\\*\\*\\*\\|@@ -\\([0-9,]+\\) \\+\\([0-9,]+\\) @@.*\\)$" nil t) |
| 610a6418 SM |
799 | (< (point) end)) |
| 800 | (combine-after-change-calls | |
| 801 | (cond | |
| 802 | ;; a file header | |
| 803 | ((match-beginning 2) (replace-match "\\2\\5\n\\4\\3" nil)) | |
| 804 | ;; a context-diff hunk header | |
| 805 | ((match-beginning 6) | |
| 806 | (let ((pt-lines1 (match-beginning 6)) | |
| 807 | (lines1 (match-string 6))) | |
| 808 | (replace-match "" nil nil nil 6) | |
| 809 | (forward-line 1) | |
| 810 | (let ((half1s (point))) | |
| 0e104800 | 811 | (while (looking-at "[-! \\][ \t]\\|#") |
| 610a6418 SM |
812 | (when (= (char-after) ?-) (delete-char 1) (insert "+")) |
| 813 | (forward-line 1)) | |
| fef8c55b | 814 | (let ((half1 (delete-and-extract-region half1s (point)))) |
| 610a6418 SM |
815 | (unless (looking-at "^--- \\([0-9]+,-?[0-9]+\\) ----$") |
| 816 | (insert half1) | |
| 817 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 818 | (let ((str1 (match-string 1))) | |
| 819 | (replace-match lines1 nil nil nil 1) | |
| 820 | (forward-line 1) | |
| 821 | (let ((half2s (point))) | |
| 0e104800 | 822 | (while (looking-at "[!+ \\][ \t]\\|#") |
| 610a6418 SM |
823 | (when (= (char-after) ?+) (delete-char 1) (insert "-")) |
| 824 | (forward-line 1)) | |
| fef8c55b | 825 | (let ((half2 (delete-and-extract-region half2s (point)))) |
| 0e104800 | 826 | (insert (or half1 "")) |
| 610a6418 | 827 | (goto-char half1s) |
| 0e104800 | 828 | (insert (or half2 "")))) |
| 610a6418 SM |
829 | (goto-char pt-lines1) |
| 830 | (insert str1)))))) | |
| 831 | ;; a unified-diff hunk header | |
| 832 | ((match-beginning 7) | |
| 833 | (replace-match "@@ -\\8 +\\7 @@" nil) | |
| 834 | (forward-line 1) | |
| 835 | (let ((c (char-after)) first last) | |
| 836 | (while (case (setq c (char-after)) | |
| 837 | (?- (setq first (or first (point))) | |
| 838 | (delete-char 1) (insert "+") t) | |
| 839 | (?+ (setq last (or last (point))) | |
| 840 | (delete-char 1) (insert "-") t) | |
| 0e104800 | 841 | ((?\\ ?#) t) |
| 610a6418 | 842 | (t (when (and first last (< first last)) |
| cb4e8176 | 843 | (insert (delete-and-extract-region first last))) |
| 610a6418 | 844 | (setq first nil last nil) |
| aa753196 | 845 | (equal ?\s c))) |
| 610a6418 SM |
846 | (forward-line 1)))))))))) |
| 847 | ||
| 848 | (defun diff-fixup-modifs (start end) | |
| 849 | "Fixup the hunk headers (in case the buffer was modified). | |
| 850 | START and END are either taken from the region (if a prefix arg is given) or | |
| 851 | else cover the whole bufer." | |
| 852 | (interactive (if current-prefix-arg | |
| 853 | (list (mark) (point)) | |
| 854 | (list (point-min) (point-max)))) | |
| 855 | (let ((inhibit-read-only t)) | |
| 856 | (save-excursion | |
| 857 | (goto-char end) (diff-end-of-hunk) | |
| 858 | (let ((plus 0) (minus 0) (space 0) (bang 0)) | |
| 859 | (while (and (= (forward-line -1) 0) (<= start (point))) | |
| bd9d7d76 SM |
860 | (if (not (looking-at |
| 861 | (concat "@@ -[0-9,]+ \\+[0-9,]+ @@" | |
| 862 | "\\|[-*][-*][-*] [0-9,]+ [-*][-*][-*][-*]$" | |
| 863 | "\\|--- .+\n\\+\\+\\+ "))) | |
| 610a6418 | 864 | (case (char-after) |
| bd9d7d76 | 865 | (?\s (incf space)) |
| 610a6418 SM |
866 | (?+ (incf plus)) |
| 867 | (?- (incf minus)) | |
| 868 | (?! (incf bang)) | |
| 0e104800 | 869 | ((?\\ ?#) nil) |
| 610a6418 SM |
870 | (t (setq space 0 plus 0 minus 0 bang 0))) |
| 871 | (cond | |
| c0078a04 | 872 | ((looking-at "@@ -[0-9]+,\\([0-9]*\\) \\+[0-9]+,\\([0-9]*\\) @@.*$") |
| 610a6418 SM |
873 | (let* ((old1 (match-string 1)) |
| 874 | (old2 (match-string 2)) | |
| 875 | (new1 (number-to-string (+ space minus))) | |
| 876 | (new2 (number-to-string (+ space plus)))) | |
| 877 | (unless (string= new2 old2) (replace-match new2 t t nil 2)) | |
| 878 | (unless (string= new1 old1) (replace-match new1 t t nil 1)))) | |
| 879 | ((looking-at "--- \\([0-9]+\\),\\([0-9]*\\) ----$") | |
| 880 | (when (> (+ space bang plus) 0) | |
| 881 | (let* ((old1 (match-string 1)) | |
| 882 | (old2 (match-string 2)) | |
| 883 | (new (number-to-string | |
| 884 | (+ space bang plus -1 (string-to-number old1))))) | |
| 885 | (unless (string= new old2) (replace-match new t t nil 2))))) | |
| 886 | ((looking-at "\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]*\\) \\*\\*\\*\\*$") | |
| 887 | (when (> (+ space bang minus) 0) | |
| 888 | (let* ((old (match-string 1)) | |
| 889 | (new (format | |
| 890 | (concat "%0" (number-to-string (length old)) "d") | |
| 891 | (+ space bang minus -1 (string-to-number old))))) | |
| 892 | (unless (string= new old) (replace-match new t t nil 2)))))) | |
| 893 | (setq space 0 plus 0 minus 0 bang 0))))))) | |
| 894 | ||
| 71296446 | 895 | ;;;; |
| 610a6418 | 896 | ;;;; Hooks |
| 71296446 | 897 | ;;;; |
| 610a6418 SM |
898 | |
| 899 | (defun diff-write-contents-hooks () | |
| 900 | "Fixup hunk headers if necessary." | |
| 901 | (if (buffer-modified-p) (diff-fixup-modifs (point-min) (point-max))) | |
| 902 | nil) | |
| 903 | ||
| 610a6418 SM |
904 | ;; It turns out that making changes in the buffer from within an |
| 905 | ;; *-change-function is asking for trouble, whereas making them | |
| 906 | ;; from a post-command-hook doesn't pose much problems | |
| 907 | (defvar diff-unhandled-changes nil) | |
| 908 | (defun diff-after-change-function (beg end len) | |
| 909 | "Remember to fixup the hunk header. | |
| 910 | See `after-change-functions' for the meaning of BEG, END and LEN." | |
| c0078a04 SM |
911 | ;; Ignoring changes when inhibit-read-only is set is strictly speaking |
| 912 | ;; incorrect, but it turns out that inhibit-read-only is normally not set | |
| 913 | ;; inside editing commands, while it tends to be set when the buffer gets | |
| 914 | ;; updated by an async process or by a conversion function, both of which | |
| 915 | ;; would rather not be uselessly slowed down by this hook. | |
| 610a6418 SM |
916 | (when (and (not undo-in-progress) (not inhibit-read-only)) |
| 917 | (if diff-unhandled-changes | |
| 918 | (setq diff-unhandled-changes | |
| 919 | (cons (min beg (car diff-unhandled-changes)) | |
| cb4e8176 | 920 | (max end (cdr diff-unhandled-changes)))) |
| 610a6418 SM |
921 | (setq diff-unhandled-changes (cons beg end))))) |
| 922 | ||
| 923 | (defun diff-post-command-hook () | |
| 924 | "Fixup hunk headers if necessary." | |
| 925 | (when (consp diff-unhandled-changes) | |
| 926 | (ignore-errors | |
| 927 | (save-excursion | |
| fef8c55b | 928 | (goto-char (car diff-unhandled-changes)) |
| cb4e8176 SM |
929 | ;; Maybe we've cut the end of the hunk before point. |
| 930 | (if (and (bolp) (not (bobp))) (backward-char 1)) | |
| 1eabc5e6 SM |
931 | ;; We used to fixup modifs on all the changes, but it turns out |
| 932 | ;; that it's safer not to do it on big changes, for example | |
| 933 | ;; when yanking a big diff, since we might then screw up perfectly | |
| 934 | ;; correct values. -stef | |
| 935 | ;; (unless (ignore-errors | |
| 936 | ;; (diff-beginning-of-hunk) | |
| 937 | ;; (save-excursion | |
| 938 | ;; (diff-end-of-hunk) | |
| 939 | ;; (> (point) (car diff-unhandled-changes)))) | |
| 940 | ;; (goto-char (car diff-unhandled-changes)) | |
| 941 | ;; (re-search-forward diff-hunk-header-re (cdr diff-unhandled-changes)) | |
| 942 | ;; (diff-beginning-of-hunk)) | |
| 943 | ;; (diff-fixup-modifs (point) (cdr diff-unhandled-changes)) | |
| 944 | (diff-beginning-of-hunk) | |
| 945 | (when (save-excursion | |
| 946 | (diff-end-of-hunk) | |
| cb4e8176 | 947 | (>= (point) (cdr diff-unhandled-changes))) |
| 1eabc5e6 | 948 | (diff-fixup-modifs (point) (cdr diff-unhandled-changes))))) |
| 610a6418 SM |
949 | (setq diff-unhandled-changes nil))) |
| 950 | ||
| 6fc049f6 SM |
951 | (defun diff-next-error (arg reset) |
| 952 | ;; Select a window that displays the current buffer so that point | |
| 953 | ;; movements are reflected in that window. Otherwise, the user might | |
| 954 | ;; never see the hunk corresponding to the source she's jumping to. | |
| 955 | (pop-to-buffer (current-buffer)) | |
| 956 | (if reset (goto-char (point-min))) | |
| 957 | (diff-hunk-next arg) | |
| 958 | (diff-goto-source)) | |
| 610a6418 | 959 | |
| 610a6418 | 960 | ;;;###autoload |
| d87e5627 | 961 | (define-derived-mode diff-mode fundamental-mode "Diff" |
| 0b82e382 | 962 | "Major mode for viewing/editing context diffs. |
| 769dd0f1 SM |
963 | Supports unified and context diffs as well as (to a lesser extent) |
| 964 | normal diffs. | |
| df52e0e7 | 965 | When the buffer is read-only, the ESC prefix is not necessary. |
| 3b696504 | 966 | If you edit the buffer manually, diff-mode will try to update the hunk |
| df52e0e7 SM |
967 | headers for you on-the-fly. |
| 968 | ||
| 969 | You can also switch between context diff and unified diff with \\[diff-context->unified], | |
| 72147c53 | 970 | or vice versa with \\[diff-unified->context] and you can also reverse the direction of |
| df52e0e7 | 971 | a diff with \\[diff-reverse-direction]." |
| 610a6418 SM |
972 | (set (make-local-variable 'font-lock-defaults) diff-font-lock-defaults) |
| 973 | (set (make-local-variable 'outline-regexp) diff-outline-regexp) | |
| ccce6558 DL |
974 | (set (make-local-variable 'imenu-generic-expression) |
| 975 | diff-imenu-generic-expression) | |
| 19e713d8 DL |
976 | ;; These are not perfect. They would be better done separately for |
| 977 | ;; context diffs and unidiffs. | |
| 978 | ;; (set (make-local-variable 'paragraph-start) | |
| 979 | ;; (concat "@@ " ; unidiff hunk | |
| 980 | ;; "\\|\\*\\*\\* " ; context diff hunk or file start | |
| 981 | ;; "\\|--- [^\t]+\t")) ; context or unidiff file | |
| 982 | ;; ; start (first or second line) | |
| 983 | ;; (set (make-local-variable 'paragraph-separate) paragraph-start) | |
| 984 | ;; (set (make-local-variable 'page-delimiter) "--- [^\t]+\t") | |
| 985 | ;; compile support | |
| 6fc049f6 | 986 | (set (make-local-variable 'next-error-function) 'diff-next-error) |
| cdbb79c1 | 987 | |
| 769dd0f1 | 988 | (when (and (> (point-max) (point-min)) diff-default-read-only) |
| 2b960ac0 | 989 | (toggle-read-only t)) |
| 769dd0f1 | 990 | ;; setup change hooks |
| e8a1ed31 | 991 | (if (not diff-update-on-the-fly) |
| 3ccdb14e | 992 | (add-hook 'write-contents-functions 'diff-write-contents-hooks nil t) |
| 610a6418 | 993 | (make-local-variable 'diff-unhandled-changes) |
| 3cec9c57 SM |
994 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 995 | (add-hook 'post-command-hook 'diff-post-command-hook nil t)) | |
| 610a6418 | 996 | ;; Neat trick from Dave Love to add more bindings in read-only mode: |
| 22cd1973 SM |
997 | (let ((ro-bind (cons 'buffer-read-only diff-mode-shared-map))) |
| 998 | (add-to-list 'minor-mode-overriding-map-alist ro-bind) | |
| 999 | ;; Turn off this little trick in case the buffer is put in view-mode. | |
| 1000 | (add-hook 'view-mode-hook | |
| 1001 | `(lambda () | |
| 1002 | (setq minor-mode-overriding-map-alist | |
| 5c84686c | 1003 | (delq ',ro-bind minor-mode-overriding-map-alist))) |
| 22cd1973 | 1004 | nil t)) |
| 281096ed SM |
1005 | ;; add-log support |
| 1006 | (set (make-local-variable 'add-log-current-defun-function) | |
| 1007 | 'diff-current-defun) | |
| 1b1b5dae SM |
1008 | (set (make-local-variable 'add-log-buffer-file-name-function) |
| 1009 | 'diff-find-file-name)) | |
| 610a6418 SM |
1010 | |
| 1011 | ;;;###autoload | |
| 0b82e382 SM |
1012 | (define-minor-mode diff-minor-mode |
| 1013 | "Minor mode for viewing/editing context diffs. | |
| 1014 | \\{diff-minor-mode-map}" | |
| cfc80227 | 1015 | :group 'diff-mode :lighter " Diff" |
| 0b82e382 | 1016 | ;; FIXME: setup font-lock |
| fef8c55b | 1017 | ;; setup change hooks |
| e8a1ed31 | 1018 | (if (not diff-update-on-the-fly) |
| 3ccdb14e | 1019 | (add-hook 'write-contents-functions 'diff-write-contents-hooks nil t) |
| fef8c55b | 1020 | (make-local-variable 'diff-unhandled-changes) |
| 3cec9c57 SM |
1021 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 1022 | (add-hook 'post-command-hook 'diff-post-command-hook nil t))) | |
| 0b82e382 | 1023 | |
| 22cd1973 SM |
1024 | ;;; Handy hook functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 1025 | ||
| 1026 | (defun diff-delete-if-empty () | |
| 1027 | ;; An empty diff file means there's no more diffs to integrate, so we | |
| 1028 | ;; can just remove the file altogether. Very handy for .rej files if we | |
| 1029 | ;; remove hunks as we apply them. | |
| 1030 | (when (and buffer-file-name | |
| 1031 | (eq 0 (nth 7 (file-attributes buffer-file-name)))) | |
| 1032 | (delete-file buffer-file-name))) | |
| 1033 | ||
| 1034 | (defun diff-delete-empty-files () | |
| 1035 | "Arrange for empty diff files to be removed." | |
| 1036 | (add-hook 'after-save-hook 'diff-delete-if-empty nil t)) | |
| 1037 | ||
| 1038 | (defun diff-make-unified () | |
| 1039 | "Turn context diffs into unified diffs if applicable." | |
| 1040 | (if (save-excursion | |
| 1041 | (goto-char (point-min)) | |
| 4c174fb4 | 1042 | (and (looking-at diff-hunk-header-re) (eq (char-after) ?*))) |
| 22cd1973 SM |
1043 | (let ((mod (buffer-modified-p))) |
| 1044 | (unwind-protect | |
| 1045 | (diff-context->unified (point-min) (point-max)) | |
| 1046 | (restore-buffer-modified-p mod))))) | |
| 610a6418 | 1047 | |
| 027ac3f8 SM |
1048 | ;;; |
| 1049 | ;;; Misc operations that have proved useful at some point. | |
| 1050 | ;;; | |
| 1051 | ||
| 1052 | (defun diff-next-complex-hunk () | |
| 1053 | "Jump to the next \"complex\" hunk. | |
| 1054 | \"Complex\" is approximated by \"the hunk changes the number of lines\". | |
| 1055 | Only works for unified diffs." | |
| 1056 | (interactive) | |
| 1057 | (while | |
| 1058 | (and (re-search-forward "^@@ [-0-9]+,\\([0-9]+\\) [+0-9]+,\\([0-9]+\\) @@" | |
| 1059 | nil t) | |
| 1060 | (equal (match-string 1) (match-string 2))))) | |
| 1061 | ||
| 1eabc5e6 SM |
1062 | (defun diff-hunk-text (hunk destp char-offset) |
| 1063 | "Return the literal source text from HUNK as (TEXT . OFFSET). | |
| 1064 | if DESTP is nil TEXT is the source, otherwise the destination text. | |
| 1065 | CHAR-OFFSET is a char-offset in HUNK, and OFFSET is the corresponding | |
| 1066 | char-offset in TEXT." | |
| 3017133f | 1067 | (with-temp-buffer |
| 6e4e8a3b SM |
1068 | (insert hunk) |
| 1069 | (goto-char (point-min)) | |
| 1070 | (let ((src-pos nil) | |
| 1071 | (dst-pos nil) | |
| 1072 | (divider-pos nil) | |
| 1073 | (num-pfx-chars 2)) | |
| 1074 | ;; Set the following variables: | |
| 1075 | ;; SRC-POS buffer pos of the source part of the hunk or nil if none | |
| 1076 | ;; DST-POS buffer pos of the destination part of the hunk or nil | |
| 1077 | ;; DIVIDER-POS buffer pos of any divider line separating the src & dst | |
| 1078 | ;; NUM-PFX-CHARS number of line-prefix characters used by this format" | |
| 1079 | (cond ((looking-at "^@@") | |
| 1080 | ;; unified diff | |
| 1081 | (setq num-pfx-chars 1) | |
| 1082 | (forward-line 1) | |
| 1083 | (setq src-pos (point) dst-pos (point))) | |
| 1084 | ((looking-at "^\\*\\*") | |
| 1085 | ;; context diff | |
| 1086 | (forward-line 2) | |
| 1087 | (setq src-pos (point)) | |
| 1088 | (re-search-forward "^--- " nil t) | |
| 1089 | (forward-line 0) | |
| 1090 | (setq divider-pos (point)) | |
| 1091 | (forward-line 1) | |
| 1092 | (setq dst-pos (point))) | |
| 1093 | ((looking-at "^[0-9]+a[0-9,]+$") | |
| 1094 | ;; normal diff, insert | |
| 1095 | (forward-line 1) | |
| 1096 | (setq dst-pos (point))) | |
| 1097 | ((looking-at "^[0-9,]+d[0-9]+$") | |
| 1098 | ;; normal diff, delete | |
| 1099 | (forward-line 1) | |
| 1100 | (setq src-pos (point))) | |
| 1101 | ((looking-at "^[0-9,]+c[0-9,]+$") | |
| 1102 | ;; normal diff, change | |
| 1103 | (forward-line 1) | |
| 1104 | (setq src-pos (point)) | |
| 1105 | (re-search-forward "^---$" nil t) | |
| 1106 | (forward-line 0) | |
| 1107 | (setq divider-pos (point)) | |
| 1108 | (forward-line 1) | |
| 1109 | (setq dst-pos (point))) | |
| 1110 | (t | |
| 1111 | (error "Unknown diff hunk type"))) | |
| 1112 | ||
| 1113 | (if (if destp (null dst-pos) (null src-pos)) | |
| 1114 | ;; Implied empty text | |
| 1115 | (if char-offset '("" . 0) "") | |
| 1116 | ||
| 1117 | ;; For context diffs, either side can be empty, (if there's only | |
| 1118 | ;; added or only removed text). We should then use the other side. | |
| 1119 | (cond ((equal src-pos divider-pos) (setq src-pos dst-pos)) | |
| 1120 | ((equal dst-pos (point-max)) (setq dst-pos src-pos))) | |
| 1121 | ||
| 1122 | (when char-offset (goto-char (+ (point-min) char-offset))) | |
| 1123 | ||
| 1124 | ;; Get rid of anything except the desired text. | |
| 1125 | (save-excursion | |
| 1126 | ;; Delete unused text region | |
| 1127 | (let ((keep (if destp dst-pos src-pos))) | |
| 1128 | (when (and divider-pos (> divider-pos keep)) | |
| 1129 | (delete-region divider-pos (point-max))) | |
| 1130 | (delete-region (point-min) keep)) | |
| 1131 | ;; Remove line-prefix characters, and unneeded lines (unified diffs). | |
| 1132 | (let ((kill-char (if destp ?- ?+))) | |
| 1133 | (goto-char (point-min)) | |
| 1134 | (while (not (eobp)) | |
| 1135 | (if (eq (char-after) kill-char) | |
| 1136 | (delete-region (point) (progn (forward-line 1) (point))) | |
| 1137 | (delete-char num-pfx-chars) | |
| 1138 | (forward-line 1))))) | |
| 1139 | ||
| 1140 | (let ((text (buffer-substring-no-properties (point-min) (point-max)))) | |
| 1141 | (if char-offset (cons text (- (point) (point-min))) text)))))) | |
| 370d860c | 1142 | |
| 7530b6da | 1143 | |
| c0aa75f7 | 1144 | (defun diff-find-text (text) |
| 1eabc5e6 | 1145 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. |
| 7530b6da | 1146 | If TEXT isn't found, nil is returned." |
| 7530b6da MB |
1147 | (let* ((orig (point)) |
| 1148 | (forw (and (search-forward text nil t) | |
| 1eabc5e6 | 1149 | (cons (match-beginning 0) (match-end 0)))) |
| 7530b6da MB |
1150 | (back (and (goto-char (+ orig (length text))) |
| 1151 | (search-backward text nil t) | |
| 1eabc5e6 SM |
1152 | (cons (match-beginning 0) (match-end 0))))) |
| 1153 | ;; Choose the closest match. | |
| 1154 | (if (and forw back) | |
| 1155 | (if (> (- (car forw) orig) (- orig (car back))) back forw) | |
| 1156 | (or back forw)))) | |
| 1157 | ||
| 1158 | (defun diff-find-approx-text (text) | |
| 1159 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. | |
| 1160 | Whitespace differences are ignored." | |
| 1161 | (let* ((orig (point)) | |
| 1162 | (re (concat "^[ \t\n\f]*" | |
| 1163 | (mapconcat 'regexp-quote (split-string text) "[ \t\n\f]+") | |
| 1164 | "[ \t\n\f]*\n")) | |
| 1165 | (forw (and (re-search-forward re nil t) | |
| 1166 | (cons (match-beginning 0) (match-end 0)))) | |
| 1167 | (back (and (goto-char (+ orig (length text))) | |
| 1168 | (re-search-backward re nil t) | |
| 1169 | (cons (match-beginning 0) (match-end 0))))) | |
| 1170 | ;; Choose the closest match. | |
| 7530b6da | 1171 | (if (and forw back) |
| 1eabc5e6 | 1172 | (if (> (- (car forw) orig) (- orig (car back))) back forw) |
| 7530b6da MB |
1173 | (or back forw)))) |
| 1174 | ||
| 370d860c SM |
1175 | (defsubst diff-xor (a b) (if a (not b) b)) |
| 1176 | ||
| d868b3bd | 1177 | (defun diff-find-source-location (&optional other-file reverse) |
| 1eabc5e6 SM |
1178 | "Find out (BUF LINE-OFFSET POS SRC DST SWITCHED). |
| 1179 | BUF is the buffer corresponding to the source file. | |
| 1180 | LINE-OFFSET is the offset between the expected and actual positions | |
| 1181 | of the text of the hunk or nil if the text was not found. | |
| 1182 | POS is a pair (BEG . END) indicating the position of the text in the buffer. | |
| 1183 | SRC and DST are the two variants of text as returned by `diff-hunk-text'. | |
| 1184 | SRC is the variant that was found in the buffer. | |
| 1185 | SWITCHED is non-nil if the patch is already applied." | |
| 7b91e0f2 | 1186 | (save-excursion |
| e8a1ed31 | 1187 | (let* ((other (diff-xor other-file diff-jump-to-old-file)) |
| 370d860c SM |
1188 | (char-offset (- (point) (progn (diff-beginning-of-hunk) (point)))) |
| 1189 | (hunk (buffer-substring (point) | |
| 1190 | (save-excursion (diff-end-of-hunk) (point)))) | |
| 1191 | (old (diff-hunk-text hunk reverse char-offset)) | |
| 1192 | (new (diff-hunk-text hunk (not reverse) char-offset)) | |
| 7b91e0f2 | 1193 | ;; Find the location specification. |
| d868b3bd | 1194 | (line (if (not (looking-at "\\(?:\\*\\{15\\}.*\n\\)?[-@* ]*\\([0-9,]+\\)\\([ acd+]+\\([0-9,]+\\)\\)?")) |
| 370d860c SM |
1195 | (error "Can't find the hunk header") |
| 1196 | (if other (match-string 1) | |
| 1197 | (if (match-end 3) (match-string 3) | |
| 1198 | (unless (re-search-forward "^--- \\([0-9,]+\\)" nil t) | |
| 1199 | (error "Can't find the hunk separator")) | |
| 1200 | (match-string 1))))) | |
| 1201 | (file (or (diff-find-file-name other) (error "Can't find the file"))) | |
| 1202 | (buf (find-file-noselect file))) | |
| 7b91e0f2 SM |
1203 | ;; Update the user preference if he so wished. |
| 1204 | (when (> (prefix-numeric-value other-file) 8) | |
| e8a1ed31 | 1205 | (setq diff-jump-to-old-file other)) |
| d868b3bd SM |
1206 | (with-current-buffer buf |
| 1207 | (goto-line (string-to-number line)) | |
| 1208 | (let* ((orig-pos (point)) | |
| 1eabc5e6 | 1209 | (switched nil) |
| 22cd1973 | 1210 | ;; FIXME: Check for case where both OLD and NEW are found. |
| 1eabc5e6 SM |
1211 | (pos (or (diff-find-text (car old)) |
| 1212 | (progn (setq switched t) (diff-find-text (car new))) | |
| 1213 | (progn (setq switched nil) | |
| 22cd1973 SM |
1214 | (condition-case nil |
| 1215 | (diff-find-approx-text (car old)) | |
| 1216 | (invalid-regexp nil))) ;Regex too big. | |
| 1eabc5e6 | 1217 | (progn (setq switched t) |
| 22cd1973 SM |
1218 | (condition-case nil |
| 1219 | (diff-find-approx-text (car new)) | |
| 1220 | (invalid-regexp nil))) ;Regex too big. | |
| 1eabc5e6 | 1221 | (progn (setq switched nil) nil)))) |
| 370d860c SM |
1222 | (nconc |
| 1223 | (list buf) | |
| 1eabc5e6 SM |
1224 | (if pos |
| 1225 | (list (count-lines orig-pos (car pos)) pos) | |
| 1226 | (list nil (cons orig-pos (+ orig-pos (length (car old)))))) | |
| 370d860c SM |
1227 | (if switched (list new old t) (list old new)))))))) |
| 1228 | ||
| 7b91e0f2 | 1229 | |
| 370d860c SM |
1230 | (defun diff-hunk-status-msg (line-offset reversed dry-run) |
| 1231 | (let ((msg (if dry-run | |
| 1232 | (if reversed "already applied" "not yet applied") | |
| 1233 | (if reversed "undone" "applied")))) | |
| 1234 | (message (cond ((null line-offset) "Hunk text not found") | |
| 1235 | ((= line-offset 0) "Hunk %s") | |
| 1236 | ((= line-offset 1) "Hunk %s at offset %d line") | |
| 1237 | (t "Hunk %s at offset %d lines")) | |
| 1238 | msg line-offset))) | |
| 1239 | ||
| 1240 | ||
| 1241 | (defun diff-apply-hunk (&optional reverse) | |
| 6e4e8a3b | 1242 | "Apply the current hunk to the source file and go to the next. |
| 7530b6da | 1243 | By default, the new source file is patched, but if the variable |
| e8a1ed31 | 1244 | `diff-jump-to-old-file' is non-nil, then the old source file is |
| 7530b6da MB |
1245 | patched instead (some commands, such as `diff-goto-source' can change |
| 1246 | the value of this variable when given an appropriate prefix argument). | |
| 1247 | ||
| 4eaa6852 | 1248 | With a prefix argument, REVERSE the hunk." |
| 370d860c | 1249 | (interactive "P") |
| 281096ed | 1250 | (destructuring-bind (buf line-offset pos old new &optional switched) |
| 22cd1973 SM |
1251 | ;; If REVERSE go to the new file, otherwise go to the old. |
| 1252 | (diff-find-source-location (not reverse) reverse) | |
| 370d860c | 1253 | (cond |
| 4eaa6852 MB |
1254 | ((null line-offset) |
| 1255 | (error "Can't find the text to patch")) | |
| 370d860c | 1256 | ((and switched |
| cdbb79c1 | 1257 | ;; A reversed patch was detected, perhaps apply it in reverse. |
| 370d860c SM |
1258 | (not (save-window-excursion |
| 1259 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1260 | (goto-char (+ (car pos) (cdr old))) |
| 370d860c SM |
1261 | (y-or-n-p |
| 1262 | (if reverse | |
| 1263 | "Hunk hasn't been applied yet; apply it now? " | |
| 1264 | "Hunk has already been applied; undo it? "))))) | |
| 4eaa6852 | 1265 | (message "(Nothing done)")) |
| 370d860c | 1266 | (t |
| 4eaa6852 MB |
1267 | ;; Apply the hunk |
| 1268 | (with-current-buffer buf | |
| 1eabc5e6 SM |
1269 | (goto-char (car pos)) |
| 1270 | (delete-region (car pos) (cdr pos)) | |
| 4eaa6852 MB |
1271 | (insert (car new))) |
| 1272 | ;; Display BUF in a window | |
| 1eabc5e6 | 1273 | (set-window-point (display-buffer buf) (+ (car pos) (cdr new))) |
| 4eaa6852 MB |
1274 | (diff-hunk-status-msg line-offset (diff-xor switched reverse) nil) |
| 1275 | (when diff-advance-after-apply-hunk | |
| 1276 | (diff-hunk-next)))))) | |
| 370d860c | 1277 | |
| 7530b6da | 1278 | |
| 7530b6da MB |
1279 | (defun diff-test-hunk (&optional reverse) |
| 1280 | "See whether it's possible to apply the current hunk. | |
| 4eaa6852 | 1281 | With a prefix argument, try to REVERSE the hunk." |
| 7530b6da | 1282 | (interactive "P") |
| 370d860c | 1283 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 22cd1973 SM |
1284 | ;; If REVERSE go to the new file, otherwise go to the old. |
| 1285 | (diff-find-source-location (not reverse) reverse) | |
| 1eabc5e6 | 1286 | (set-window-point (display-buffer buf) (+ (car pos) (cdr src))) |
| 4eaa6852 | 1287 | (diff-hunk-status-msg line-offset (diff-xor reverse switched) t))) |
| 370d860c | 1288 | |
| 7530b6da | 1289 | |
| a1e2d7f7 SM |
1290 | (defalias 'diff-mouse-goto-source 'diff-goto-source) |
| 1291 | ||
| 1292 | (defun diff-goto-source (&optional other-file event) | |
| 7530b6da | 1293 | "Jump to the corresponding source line. |
| e8a1ed31 | 1294 | `diff-jump-to-old-file' (or its opposite if the OTHER-FILE prefix arg |
| 281096ed | 1295 | is given) determines whether to jump to the old or the new file. |
| 7530b6da | 1296 | If the prefix arg is bigger than 8 (for example with \\[universal-argument] \\[universal-argument]) |
| e8a1ed31 | 1297 | then `diff-jump-to-old-file' is also set, for the next invocations." |
| a1e2d7f7 | 1298 | (interactive (list current-prefix-arg last-input-event)) |
| a6373340 SM |
1299 | ;; When pointing at a removal line, we probably want to jump to |
| 1300 | ;; the old location, and else to the new (i.e. as if reverting). | |
| 1301 | ;; This is a convenient detail when using smerge-diff. | |
| a1e2d7f7 | 1302 | (if event (posn-set-point (event-end event))) |
| a6373340 SM |
1303 | (let ((rev (not (save-excursion (beginning-of-line) (looking-at "[-<]"))))) |
| 1304 | (destructuring-bind (buf line-offset pos src dst &optional switched) | |
| 1305 | (diff-find-source-location other-file rev) | |
| 1306 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1307 | (goto-char (+ (car pos) (cdr src))) |
| 55d5d717 | 1308 | (diff-hunk-status-msg line-offset (diff-xor rev switched) t)))) |
| 370d860c | 1309 | |
| 7530b6da | 1310 | |
| 281096ed | 1311 | (defun diff-current-defun () |
| 370d860c SM |
1312 | "Find the name of function at point. |
| 1313 | For use in `add-log-current-defun-function'." | |
| 2f9edc8b KG |
1314 | (save-excursion |
| 1315 | (when (looking-at diff-hunk-header-re) | |
| 1316 | (forward-line 1) | |
| 4f815065 | 1317 | (re-search-forward "^[^ ]" nil t)) |
| 2f9edc8b KG |
1318 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 1319 | (diff-find-source-location) | |
| 281096ed SM |
1320 | (beginning-of-line) |
| 1321 | (or (when (memq (char-after) '(?< ?-)) | |
| 370d860c SM |
1322 | ;; Cursor is pointing at removed text. This could be a removed |
| 1323 | ;; function, in which case, going to the source buffer will | |
| 1324 | ;; not help since the function is now removed. Instead, | |
| 1325 | ;; try to figure out the function name just from the code-fragment. | |
| 281096ed SM |
1326 | (let ((old (if switched dst src))) |
| 1327 | (with-temp-buffer | |
| 1328 | (insert (car old)) | |
| 281096ed | 1329 | (funcall (with-current-buffer buf major-mode)) |
| cb4e8176 | 1330 | (goto-char (+ (point-min) (cdr old))) |
| 281096ed SM |
1331 | (add-log-current-defun)))) |
| 1332 | (with-current-buffer buf | |
| 1eabc5e6 | 1333 | (goto-char (+ (car pos) (cdr src))) |
| 281096ed | 1334 | (add-log-current-defun)))))) |
| 027ac3f8 | 1335 | |
| 22cd1973 SM |
1336 | (defun diff-refine-hunk () |
| 1337 | "Refine the current hunk by ignoring space differences." | |
| 1338 | (interactive) | |
| 1339 | (let* ((char-offset (- (point) (progn (diff-beginning-of-hunk) (point)))) | |
| 1340 | (opts (case (char-after) (?@ "-bu") (?* "-bc") (t "-b"))) | |
| 1341 | (line-nb (and (or (looking-at "[^0-9]+\\([0-9]+\\)") | |
| 1342 | (error "Can't find line number")) | |
| 1343 | (string-to-number (match-string 1)))) | |
| 1344 | (hunk (delete-and-extract-region | |
| 1345 | (point) (save-excursion (diff-end-of-hunk) (point)))) | |
| 1346 | (lead (make-string (1- line-nb) ?\n)) ;Line nums start at 1. | |
| 1347 | (file1 (make-temp-file "diff1")) | |
| 1348 | (file2 (make-temp-file "diff2")) | |
| 1349 | (coding-system-for-read buffer-file-coding-system) | |
| 1350 | old new) | |
| 1351 | (unwind-protect | |
| 1352 | (save-excursion | |
| 1353 | (setq old (diff-hunk-text hunk nil char-offset)) | |
| 1354 | (setq new (diff-hunk-text hunk t char-offset)) | |
| 1355 | (write-region (concat lead (car old)) nil file1 nil 'nomessage) | |
| 1356 | (write-region (concat lead (car new)) nil file2 nil 'nomessage) | |
| 1357 | (with-temp-buffer | |
| 1358 | (let ((status | |
| 1359 | (call-process diff-command nil t nil | |
| 1360 | opts file1 file2))) | |
| 1361 | (case status | |
| 1362 | (0 nil) ;Nothing to reformat. | |
| 1363 | (1 (goto-char (point-min)) | |
| 1364 | ;; Remove the file-header. | |
| 1365 | (when (re-search-forward diff-hunk-header-re nil t) | |
| 1366 | (delete-region (point-min) (match-beginning 0)))) | |
| 1367 | (t (goto-char (point-max)) | |
| 1368 | (unless (bolp) (insert "\n")) | |
| 1369 | (insert hunk))) | |
| 1370 | (setq hunk (buffer-string)) | |
| 1371 | (unless (memq status '(0 1)) | |
| 1372 | (error "Diff returned: %s" status))))) | |
| 1373 | ;; Whatever happens, put back some equivalent text: either the new | |
| 1374 | ;; one or the original one in case some error happened. | |
| 1375 | (insert hunk) | |
| 1376 | (delete-file file1) | |
| 1377 | (delete-file file2)))) | |
| 1378 | ||
| 610a6418 SM |
1379 | ;; provide the package |
| 1380 | (provide 'diff-mode) | |
| 1381 | ||
| 027ac3f8 | 1382 | ;;; Old Change Log from when diff-mode wasn't part of Emacs: |
| 610a6418 SM |
1383 | ;; Revision 1.11 1999/10/09 23:38:29 monnier |
| 1384 | ;; (diff-mode-load-hook): dropped. | |
| 1385 | ;; (auto-mode-alist): also catch *.diffs. | |
| 1386 | ;; (diff-find-file-name, diff-mode): add smarts to find the right file | |
| 1387 | ;; for *.rej files (that lack any file name indication). | |
| 1388 | ;; | |
| 1389 | ;; Revision 1.10 1999/09/30 15:32:11 monnier | |
| 1390 | ;; added support for "\ No newline at end of file". | |
| 1391 | ;; | |
| 1392 | ;; Revision 1.9 1999/09/15 00:01:13 monnier | |
| 1393 | ;; - added basic `compile' support. | |
| 1394 | ;; - have diff-kill-hunk call diff-kill-file if it's the only hunk. | |
| 1395 | ;; - diff-kill-file now tries to kill the leading garbage as well. | |
| 1396 | ;; | |
| 1397 | ;; Revision 1.8 1999/09/13 21:10:09 monnier | |
| 1398 | ;; - don't use CL in the autoloaded code | |
| 1399 | ;; - accept diffs using -T | |
| 1400 | ;; | |
| 1401 | ;; Revision 1.7 1999/09/05 20:53:03 monnier | |
| 1402 | ;; interface to ediff-patch | |
| 1403 | ;; | |
| 1404 | ;; Revision 1.6 1999/09/01 20:55:13 monnier | |
| 1405 | ;; (ediff=patch-file): add bindings to call ediff-patch. | |
| 1406 | ;; (diff-find-file-name): taken out of diff-goto-source. | |
| 1407 | ;; (diff-unified->context, diff-context->unified, diff-reverse-direction, | |
| 1408 | ;; diff-fixup-modifs): only use the region if a prefix arg is given. | |
| 1409 | ;; | |
| 1410 | ;; Revision 1.5 1999/08/31 19:18:52 monnier | |
| 1411 | ;; (diff-beginning-of-file, diff-prev-file): fixed wrong parenthesis. | |
| 1412 | ;; | |
| 1413 | ;; Revision 1.4 1999/08/31 13:01:44 monnier | |
| 1414 | ;; use `combine-after-change-calls' to minimize the slowdown of font-lock. | |
| 1415 | ;; | |
| 1416 | ||
| 4f815065 | 1417 | ;; arch-tag: 2571d7ff-bc28-4cf9-8585-42e21890be66 |
| 610a6418 | 1418 | ;;; diff-mode.el ends here |