HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| b532d575 | 1 | ;;; diff-mode.el --- a mode for viewing/editing context diffs |
| 610a6418 | 2 | |
| 0d30b337 | 3 | ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 1c58b439 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
| 610a6418 | 5 | |
| cc1eecfd | 6 | ;; Author: Stefan Monnier <monnier@iro.umontreal.ca> |
| 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 | |
| b4aa6026 | 13 | ;; the Free Software Foundation; either version 3, or (at your option) |
| 610a6418 SM |
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 | ||
| 8330c175 SM |
42 | ;; - Improve `diff-add-change-log-entries-other-window', |
| 43 | ;; it is very simplistic now. | |
| 8a72c7f8 | 44 | ;; |
| 22cd1973 SM |
45 | ;; - Add a `delete-after-apply' so C-c C-a automatically deletes hunks. |
| 46 | ;; Also allow C-c C-a to delete already-applied hunks. | |
| 47 | ;; | |
| 48 | ;; - Try `diff <file> <hunk>' to try and fuzzily discover the source location | |
| 49 | ;; of a hunk. Show then the changes between <file> and <hunk> and make it | |
| 50 | ;; possible to apply them to <file>, <hunk-src>, or <hunk-dst>. | |
| 51 | ;; Or maybe just make it into a ".rej to diff3-markers converter". | |
| e78cf8e5 | 52 | ;; Maybe just use `wiggle' (by Neil Brown) to do it for us. |
| 22cd1973 | 53 | ;; |
| e78cf8e5 SM |
54 | ;; - in diff-apply-hunk, strip context in replace-match to better |
| 55 | ;; preserve markers and spacing. | |
| 027ac3f8 | 56 | ;; - Handle `diff -b' output in context->unified. |
| 610a6418 SM |
57 | |
| 58 | ;;; Code: | |
| 610a6418 SM |
59 | (eval-when-compile (require 'cl)) |
| 60 | ||
| 6e0f362c JB |
61 | (defvar add-log-buffer-file-name-function) |
| 62 | ||
| 610a6418 SM |
63 | |
| 64 | (defgroup diff-mode () | |
| aa753196 | 65 | "Major mode for viewing/editing diffs." |
| ccce6558 | 66 | :version "21.1" |
| 610a6418 SM |
67 | :group 'tools |
| 68 | :group 'diff) | |
| 69 | ||
| 22cd1973 | 70 | (defcustom diff-default-read-only nil |
| 769dd0f1 SM |
71 | "If non-nil, `diff-mode' buffers default to being read-only." |
| 72 | :type 'boolean | |
| 73 | :group 'diff-mode) | |
| 74 | ||
| e8a1ed31 | 75 | (defcustom diff-jump-to-old-file nil |
| 44a07c5a | 76 | "Non-nil means `diff-goto-source' jumps to the old file. |
| 610a6418 | 77 | Else, it jumps to the new file." |
| f5307782 JB |
78 | :type 'boolean |
| 79 | :group 'diff-mode) | |
| 610a6418 | 80 | |
| e8a1ed31 | 81 | (defcustom diff-update-on-the-fly t |
| 610a6418 SM |
82 | "*Non-nil means hunk headers are kept up-to-date on-the-fly. |
| 83 | When editing a diff file, the line numbers in the hunk headers | |
| 84 | need to be kept consistent with the actual diff. This can | |
| 85 | either be done on the fly (but this sometimes interacts poorly with the | |
| 86 | undo mechanism) or whenever the file is written (can be slow | |
| 87 | when editing big diffs)." | |
| f5307782 JB |
88 | :type 'boolean |
| 89 | :group 'diff-mode) | |
| 610a6418 | 90 | |
| 00df919e MB |
91 | (defcustom diff-advance-after-apply-hunk t |
| 92 | "*Non-nil means `diff-apply-hunk' will move to the next hunk after applying." | |
| f5307782 JB |
93 | :type 'boolean |
| 94 | :group 'diff-mode) | |
| 00df919e | 95 | |
| 2659df68 SM |
96 | (defcustom diff-auto-refine t |
| 97 | "Automatically highlight changes in detail as the user visits hunks." | |
| 97546017 DN |
98 | :type 'boolean |
| 99 | :group 'diff-mode) | |
| 00df919e | 100 | |
| 22cd1973 SM |
101 | (defcustom diff-mode-hook nil |
| 102 | "Run after setting up the `diff-mode' major mode." | |
| 103 | :type 'hook | |
| f5307782 JB |
104 | :options '(diff-delete-empty-files diff-make-unified) |
| 105 | :group 'diff-mode) | |
| 610a6418 SM |
106 | |
| 107 | (defvar diff-outline-regexp | |
| 108 | "\\([*+][*+][*+] [^0-9]\\|@@ ...\\|\\*\\*\\* [0-9].\\|--- [0-9]..\\)") | |
| 109 | ||
| cd632e57 | 110 | ;;;; |
| 610a6418 | 111 | ;;;; keymap, menu, ... |
| cd632e57 | 112 | ;;;; |
| 610a6418 | 113 | |
| d87e5627 | 114 | (easy-mmode-defmap diff-mode-shared-map |
| 027ac3f8 | 115 | '(;; From Pavel Machek's patch-mode. |
| d87e5627 SM |
116 | ("n" . diff-hunk-next) |
| 117 | ("N" . diff-file-next) | |
| 118 | ("p" . diff-hunk-prev) | |
| 119 | ("P" . diff-file-prev) | |
| 25edda53 DN |
120 | ("\t" . diff-hunk-next) |
| 121 | ([backtab] . diff-hunk-prev) | |
| d87e5627 SM |
122 | ("k" . diff-hunk-kill) |
| 123 | ("K" . diff-file-kill) | |
| 027ac3f8 | 124 | ;; From compilation-minor-mode. |
| d87e5627 SM |
125 | ("}" . diff-file-next) |
| 126 | ("{" . diff-file-prev) | |
| 610a6418 | 127 | ("\C-m" . diff-goto-source) |
| a1e2d7f7 | 128 | ([mouse-2] . diff-goto-source) |
| 027ac3f8 | 129 | ;; From XEmacs' diff-mode. |
| fe39af99 SM |
130 | ;; Standard M-w is useful, so don't change M-W. |
| 131 | ;;("W" . widen) | |
| 610a6418 SM |
132 | ;;("." . diff-goto-source) ;display-buffer |
| 133 | ;;("f" . diff-goto-source) ;find-file | |
| 134 | ("o" . diff-goto-source) ;other-window | |
| 135 | ;;("w" . diff-goto-source) ;other-frame | |
| 136 | ;;("N" . diff-narrow) | |
| 137 | ;;("h" . diff-show-header) | |
| 138 | ;;("j" . diff-show-difference) ;jump to Nth diff | |
| 139 | ;;("q" . diff-quit) | |
| e78cf8e5 SM |
140 | ;; Not useful if you have to metafy them. |
| 141 | ;;(" " . scroll-up) | |
| 142 | ;;("\177" . scroll-down) | |
| 143 | ;; Standard M-a is useful, so don't change M-A. | |
| 144 | ;;("A" . diff-ediff-patch) | |
| 145 | ;; Standard M-r is useful, so don't change M-r or M-R. | |
| 146 | ;;("r" . diff-restrict-view) | |
| 147 | ;;("R" . diff-reverse-direction) | |
| c010ecfa | 148 | ("q" . quit-window)) |
| 0b82e382 | 149 | "Basic keymap for `diff-mode', bound to various prefix keys.") |
| 610a6418 | 150 | |
| d87e5627 | 151 | (easy-mmode-defmap diff-mode-map |
| 610a6418 | 152 | `(("\e" . ,diff-mode-shared-map) |
| 027ac3f8 SM |
153 | ;; From compilation-minor-mode. |
| 154 | ("\C-c\C-c" . diff-goto-source) | |
| 8330c175 SM |
155 | ;; By analogy with the global C-x 4 a binding. |
| 156 | ("\C-x4A" . diff-add-change-log-entries-other-window) | |
| 027ac3f8 | 157 | ;; Misc operations. |
| 3cec9c57 | 158 | ("\C-c\C-a" . diff-apply-hunk) |
| 28408bfd RS |
159 | ("\C-c\C-e" . diff-ediff-patch) |
| 160 | ("\C-c\C-n" . diff-restrict-view) | |
| 28408bfd | 161 | ("\C-c\C-s" . diff-split-hunk) |
| b711788a | 162 | ("\C-c\C-t" . diff-test-hunk) |
| 2659df68 | 163 | ("\C-c\C-r" . diff-reverse-direction) |
| 28408bfd | 164 | ("\C-c\C-u" . diff-context->unified) |
| fe39af99 SM |
165 | ;; `d' because it duplicates the context :-( --Stef |
| 166 | ("\C-c\C-d" . diff-unified->context) | |
| 2659df68 SM |
167 | ("\C-c\C-w" . diff-ignore-whitespace-hunk) |
| 168 | ("\C-c\C-b" . diff-refine-hunk) ;No reason for `b' :-( | |
| 677c0382 | 169 | ("\C-c\C-f" . next-error-follow-minor-mode)) |
| 610a6418 SM |
170 | "Keymap for `diff-mode'. See also `diff-mode-shared-map'.") |
| 171 | ||
| 172 | (easy-menu-define diff-mode-menu diff-mode-map | |
| 173 | "Menu for `diff-mode'." | |
| 174 | '("Diff" | |
| fb4dfdd2 DN |
175 | ["Jump to Source" diff-goto-source |
| 176 | :help "Jump to the corresponding source line"] | |
| 177 | ["Apply hunk" diff-apply-hunk | |
| 178 | :help "Apply the current hunk to the source file and go to the next"] | |
| 179 | ["Test applying hunk" diff-test-hunk | |
| 180 | :help "See whether it's possible to apply the current hunk"] | |
| 181 | ["Apply diff with Ediff" diff-ediff-patch | |
| 182 | :help "Call `ediff-patch-file' on the current buffer"] | |
| 8330c175 | 183 | ["Create Change Log entries" diff-add-change-log-entries-other-window |
| 8a72c7f8 | 184 | :help "Create ChangeLog entries for the changes in the diff buffer"] |
| 8f2d38de | 185 | "-----" |
| fb4dfdd2 DN |
186 | ["Reverse direction" diff-reverse-direction |
| 187 | :help "Reverse the direction of the diffs"] | |
| 188 | ["Context -> Unified" diff-context->unified | |
| 189 | :help "Convert context diffs to unified diffs"] | |
| 190 | ["Unified -> Context" diff-unified->context | |
| 191 | :help "Convert unified diffs to context diffs"] | |
| 610a6418 | 192 | ;;["Fixup Headers" diff-fixup-modifs (not buffer-read-only)] |
| 8f2d38de | 193 | "-----" |
| fb4dfdd2 DN |
194 | ["Split hunk" diff-split-hunk |
| 195 | :active (diff-splittable-p) | |
| 196 | :help "Split the current (unified diff) hunk at point into two hunks"] | |
| 197 | ["Ignore whitespace changes" diff-ignore-whitespace-hunk | |
| 198 | :help "Re-diff the current hunk, ignoring whitespace differences"] | |
| 199 | ["Highlight fine changes" diff-refine-hunk | |
| 200 | :help "Highlight changes of hunk at point at a finer granularity"] | |
| 201 | ["Kill current hunk" diff-hunk-kill | |
| 202 | :help "Kill current hunk"] | |
| 203 | ["Kill current file's hunks" diff-file-kill | |
| 204 | :help "Kill all current file's hunks"] | |
| 8f2d38de | 205 | "-----" |
| fb4dfdd2 DN |
206 | ["Previous Hunk" diff-hunk-prev |
| 207 | :help "Go to the previous count'th hunk"] | |
| 208 | ["Next Hunk" diff-hunk-next | |
| 209 | :help "Go to the next count'th hunk"] | |
| 210 | ["Previous File" diff-file-prev | |
| 211 | :help "Go to the previous count'th file"] | |
| 212 | ["Next File" diff-file-next | |
| 213 | :help "Go to the next count'th file"] | |
| 610a6418 SM |
214 | )) |
| 215 | ||
| 3cec9c57 | 216 | (defcustom diff-minor-mode-prefix "\C-c=" |
| 0b82e382 | 217 | "Prefix key for `diff-minor-mode' commands." |
| f5307782 JB |
218 | :type '(choice (string "\e") (string "C-c=") string) |
| 219 | :group 'diff-mode) | |
| 0b82e382 | 220 | |
| d87e5627 SM |
221 | (easy-mmode-defmap diff-minor-mode-map |
| 222 | `((,diff-minor-mode-prefix . ,diff-mode-shared-map)) | |
| 0b82e382 SM |
223 | "Keymap for `diff-minor-mode'. See also `diff-mode-shared-map'.") |
| 224 | ||
| 610a6418 | 225 | |
| cd632e57 | 226 | ;;;; |
| 610a6418 | 227 | ;;;; font-lock support |
| cd632e57 | 228 | ;;;; |
| 610a6418 | 229 | |
| 221711eb | 230 | (defface diff-header |
| 55f2eb7e | 231 | '((((class color) (min-colors 88) (background light)) |
| 9f4e4f5b | 232 | :background "grey80") |
| 55f2eb7e | 233 | (((class color) (min-colors 88) (background dark)) |
| 4f815065 | 234 | :background "grey45") |
| 55f2eb7e | 235 | (((class color) (background light)) |
| 4f815065 | 236 | :foreground "blue1" :weight bold) |
| 55f2eb7e | 237 | (((class color) (background dark)) |
| 4f815065 SM |
238 | :foreground "green" :weight bold) |
| 239 | (t :weight bold)) | |
| d676819e LK |
240 | "`diff-mode' face inherited by hunk and index header faces." |
| 241 | :group 'diff-mode) | |
| 221711eb MB |
242 | ;; backward-compatibility alias |
| 243 | (put 'diff-header-face 'face-alias 'diff-header) | |
| 244 | (defvar diff-header-face 'diff-header) | |
| c0aa75f7 | 245 | |
| 221711eb | 246 | (defface diff-file-header |
| 55f2eb7e | 247 | '((((class color) (min-colors 88) (background light)) |
| 4f815065 | 248 | :background "grey70" :weight bold) |
| 55f2eb7e | 249 | (((class color) (min-colors 88) (background dark)) |
| 4f815065 | 250 | :background "grey60" :weight bold) |
| 55f2eb7e | 251 | (((class color) (background light)) |
| f3abba99 | 252 | :foreground "green" :weight bold) |
| 55f2eb7e | 253 | (((class color) (background dark)) |
| 4f815065 SM |
254 | :foreground "cyan" :weight bold) |
| 255 | (t :weight bold)) ; :height 1.3 | |
| d676819e LK |
256 | "`diff-mode' face used to highlight file header lines." |
| 257 | :group 'diff-mode) | |
| 221711eb MB |
258 | ;; backward-compatibility alias |
| 259 | (put 'diff-file-header-face 'face-alias 'diff-file-header) | |
| 260 | (defvar diff-file-header-face 'diff-file-header) | |
| 610a6418 | 261 | |
| 221711eb MB |
262 | (defface diff-index |
| 263 | '((t :inherit diff-file-header)) | |
| d676819e LK |
264 | "`diff-mode' face used to highlight index header lines." |
| 265 | :group 'diff-mode) | |
| 221711eb MB |
266 | ;; backward-compatibility alias |
| 267 | (put 'diff-index-face 'face-alias 'diff-index) | |
| 268 | (defvar diff-index-face 'diff-index) | |
| 610a6418 | 269 | |
| 221711eb MB |
270 | (defface diff-hunk-header |
| 271 | '((t :inherit diff-header)) | |
| d676819e LK |
272 | "`diff-mode' face used to highlight hunk header lines." |
| 273 | :group 'diff-mode) | |
| 221711eb MB |
274 | ;; backward-compatibility alias |
| 275 | (put 'diff-hunk-header-face 'face-alias 'diff-hunk-header) | |
| 276 | (defvar diff-hunk-header-face 'diff-hunk-header) | |
| 610a6418 | 277 | |
| 221711eb MB |
278 | (defface diff-removed |
| 279 | '((t :inherit diff-changed)) | |
| d676819e LK |
280 | "`diff-mode' face used to highlight removed lines." |
| 281 | :group 'diff-mode) | |
| 221711eb MB |
282 | ;; backward-compatibility alias |
| 283 | (put 'diff-removed-face 'face-alias 'diff-removed) | |
| 284 | (defvar diff-removed-face 'diff-removed) | |
| 610a6418 | 285 | |
| 221711eb MB |
286 | (defface diff-added |
| 287 | '((t :inherit diff-changed)) | |
| d676819e LK |
288 | "`diff-mode' face used to highlight added lines." |
| 289 | :group 'diff-mode) | |
| 221711eb MB |
290 | ;; backward-compatibility alias |
| 291 | (put 'diff-added-face 'face-alias 'diff-added) | |
| 292 | (defvar diff-added-face 'diff-added) | |
| 610a6418 | 293 | |
| 221711eb | 294 | (defface diff-changed |
| 86a27a3a | 295 | '((((type tty pc) (class color) (background light)) |
| 4f815065 | 296 | :foreground "magenta" :weight bold :slant italic) |
| 86a27a3a | 297 | (((type tty pc) (class color) (background dark)) |
| 4f815065 | 298 | :foreground "yellow" :weight bold :slant italic)) |
| d676819e LK |
299 | "`diff-mode' face used to highlight changed lines." |
| 300 | :group 'diff-mode) | |
| 221711eb MB |
301 | ;; backward-compatibility alias |
| 302 | (put 'diff-changed-face 'face-alias 'diff-changed) | |
| 303 | (defvar diff-changed-face 'diff-changed) | |
| 610a6418 | 304 | |
| f3abba99 JL |
305 | (defface diff-indicator-removed |
| 306 | '((t :inherit diff-removed)) | |
| 307 | "`diff-mode' face used to highlight indicator of removed lines (-, <)." | |
| 308 | :group 'diff-mode | |
| 309 | :version "22.1") | |
| 310 | (defvar diff-indicator-removed-face 'diff-indicator-removed) | |
| 311 | ||
| 312 | (defface diff-indicator-added | |
| 313 | '((t :inherit diff-added)) | |
| 314 | "`diff-mode' face used to highlight indicator of added lines (+, >)." | |
| 315 | :group 'diff-mode | |
| 316 | :version "22.1") | |
| 317 | (defvar diff-indicator-added-face 'diff-indicator-added) | |
| 318 | ||
| 319 | (defface diff-indicator-changed | |
| 320 | '((t :inherit diff-changed)) | |
| 321 | "`diff-mode' face used to highlight indicator of changed lines." | |
| 322 | :group 'diff-mode | |
| 323 | :version "22.1") | |
| 324 | (defvar diff-indicator-changed-face 'diff-indicator-changed) | |
| 325 | ||
| 221711eb | 326 | (defface diff-function |
| ea5d66db | 327 | '((t :inherit diff-header)) |
| d676819e LK |
328 | "`diff-mode' face used to highlight function names produced by \"diff -p\"." |
| 329 | :group 'diff-mode) | |
| 221711eb MB |
330 | ;; backward-compatibility alias |
| 331 | (put 'diff-function-face 'face-alias 'diff-function) | |
| 332 | (defvar diff-function-face 'diff-function) | |
| 34460354 | 333 | |
| 221711eb | 334 | (defface diff-context |
| f3abba99 | 335 | '((((class color grayscale) (min-colors 88)) :inherit shadow)) |
| d676819e LK |
336 | "`diff-mode' face used to highlight context and other side-information." |
| 337 | :group 'diff-mode) | |
| 221711eb MB |
338 | ;; backward-compatibility alias |
| 339 | (put 'diff-context-face 'face-alias 'diff-context) | |
| 340 | (defvar diff-context-face 'diff-context) | |
| c0aa75f7 | 341 | |
| 221711eb MB |
342 | (defface diff-nonexistent |
| 343 | '((t :inherit diff-file-header)) | |
| d676819e LK |
344 | "`diff-mode' face used to highlight nonexistent files in recursive diffs." |
| 345 | :group 'diff-mode) | |
| 221711eb MB |
346 | ;; backward-compatibility alias |
| 347 | (put 'diff-nonexistent-face 'face-alias 'diff-nonexistent) | |
| 348 | (defvar diff-nonexistent-face 'diff-nonexistent) | |
| 469fc0a2 | 349 | |
| 22cd1973 SM |
350 | (defconst diff-yank-handler '(diff-yank-function)) |
| 351 | (defun diff-yank-function (text) | |
| 1ec7bd14 SM |
352 | ;; FIXME: the yank-handler is now called separately on each piece of text |
| 353 | ;; with a yank-handler property, so the next-single-property-change call | |
| 354 | ;; below will always return nil :-( --stef | |
| 22cd1973 SM |
355 | (let ((mixed (next-single-property-change 0 'yank-handler text)) |
| 356 | (start (point))) | |
| 357 | ;; First insert the text. | |
| 358 | (insert text) | |
| 359 | ;; If the text does not include any diff markers and if we're not | |
| 360 | ;; yanking back into a diff-mode buffer, get rid of the prefixes. | |
| 361 | (unless (or mixed (derived-mode-p 'diff-mode)) | |
| 362 | (undo-boundary) ; Just in case the user wanted the prefixes. | |
| 363 | (let ((re (save-excursion | |
| 364 | (if (re-search-backward "^[><!][ \t]" start t) | |
| 365 | (if (eq (char-after) ?!) | |
| 366 | "^[!+- ][ \t]" "^[<>][ \t]") | |
| 367 | "^[ <>!+-]")))) | |
| 368 | (save-excursion | |
| 369 | (while (re-search-backward re start t) | |
| 370 | (replace-match "" t t))))))) | |
| cfc80227 | 371 | |
| f52d2f9c | 372 | (defconst diff-hunk-header-re-unified |
| 43392d12 | 373 | "^@@ -\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)? \\+\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)? @@") |
| 22cd1973 | 374 | |
| 610a6418 | 375 | (defvar diff-font-lock-keywords |
| f52d2f9c SM |
376 | `((,(concat "\\(" diff-hunk-header-re-unified "\\)\\(.*\\)$") |
| 377 | (1 diff-hunk-header-face) (6 diff-function-face)) | |
| f3abba99 JL |
378 | ("^\\(\\*\\{15\\}\\)\\(.*\\)$" ;context |
| 379 | (1 diff-hunk-header-face) (2 diff-function-face)) | |
| 370d860c | 380 | ("^\\*\\*\\* .+ \\*\\*\\*\\*". diff-hunk-header-face) ;context |
| f3abba99 JL |
381 | ("^--- .+ ----$" . diff-hunk-header-face) ;context |
| 382 | ("^[0-9,]+[acd][0-9,]+$" . diff-hunk-header-face) ;normal | |
| 383 | ("^---$" . diff-hunk-header-face) ;normal | |
| 4c969f97 SM |
384 | ;; For file headers, accept files with spaces, but be careful to rule |
| 385 | ;; out false-positives when matching hunk headers. | |
| 386 | ("^\\(---\\|\\+\\+\\+\\|\\*\\*\\*\\) \\([^\t\n]+?\\)\\(?:\t.*\\| \\(\\*\\*\\*\\*\\|----\\)\\)?\n" | |
| 387 | (0 diff-header-face) | |
| 388 | (2 (if (not (match-end 3)) diff-file-header-face) prepend)) | |
| f3abba99 JL |
389 | ("^\\([-<]\\)\\(.*\n\\)" |
| 390 | (1 diff-indicator-removed-face) (2 diff-removed-face)) | |
| 391 | ("^\\([+>]\\)\\(.*\n\\)" | |
| 392 | (1 diff-indicator-added-face) (2 diff-added-face)) | |
| 393 | ("^\\(!\\)\\(.*\n\\)" | |
| 394 | (1 diff-indicator-changed-face) (2 diff-changed-face)) | |
| 395 | ("^Index: \\(.+\\).*\n" | |
| 396 | (0 diff-header-face) (1 diff-index-face prepend)) | |
| 7dfb000f | 397 | ("^Only in .*\n" . diff-nonexistent-face) |
| f3abba99 | 398 | ("^\\(#\\)\\(.*\\)" |
| 050dcc13 JL |
399 | (1 font-lock-comment-delimiter-face) |
| 400 | (2 font-lock-comment-face)) | |
| f3abba99 | 401 | ("^[^-=+*!<>#].*\n" (0 diff-context-face)))) |
| 610a6418 SM |
402 | |
| 403 | (defconst diff-font-lock-defaults | |
| 0e104800 | 404 | '(diff-font-lock-keywords t nil nil nil (font-lock-multiline . nil))) |
| 610a6418 | 405 | |
| ccce6558 DL |
406 | (defvar diff-imenu-generic-expression |
| 407 | ;; Prefer second name as first is most likely to be a backup or | |
| 824693e7 DL |
408 | ;; version-control name. The [\t\n] at the end of the unidiff pattern |
| 409 | ;; catches Debian source diff files (which lack the trailing date). | |
| 410 | '((nil "\\+\\+\\+\\ \\([^\t\n]+\\)[\t\n]" 1) ; unidiffs | |
| ccce6558 DL |
411 | (nil "^--- \\([^\t\n]+\\)\t.*\n\\*" 1))) ; context diffs |
| 412 | ||
| cd632e57 | 413 | ;;;; |
| 610a6418 | 414 | ;;;; Movement |
| cd632e57 | 415 | ;;;; |
| 610a6418 | 416 | |
| f52d2f9c SM |
417 | (defvar diff-valid-unified-empty-line t |
| 418 | "If non-nil, empty lines are valid in unified diffs. | |
| 419 | Some versions of diff replace all-blank context lines in unified format with | |
| 420 | empty lines. This makes the format less robust, but is tolerated. | |
| 421 | See http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01990.html") | |
| 422 | ||
| 423 | (defconst diff-hunk-header-re | |
| 424 | (concat "^\\(?:" diff-hunk-header-re-unified ".*\\|\\*\\{15\\}.*\n\\*\\*\\* .+ \\*\\*\\*\\*\\|[0-9]+\\(,[0-9]+\\)?[acd][0-9]+\\(,[0-9]+\\)?\\)$")) | |
| bd9d7d76 | 425 | (defconst diff-file-header-re (concat "^\\(--- .+\n\\+\\+\\+ \\|\\*\\*\\* .+\n--- \\|[^-+!<>0-9@* ]\\).+\n" (substring diff-hunk-header-re 1))) |
| 610a6418 SM |
426 | (defvar diff-narrowed-to nil) |
| 427 | ||
| be36f934 | 428 | (defun diff-hunk-style (&optional style) |
| 996884b2 | 429 | (when (looking-at diff-hunk-header-re) |
| be36f934 | 430 | (setq style (cdr (assq (char-after) '((?@ . unified) (?* . context))))) |
| 996884b2 | 431 | (goto-char (match-end 0))) |
| be36f934 SM |
432 | style) |
| 433 | ||
| f52d2f9c SM |
434 | (defun diff-end-of-hunk (&optional style donttrustheader) |
| 435 | (let (end) | |
| 436 | (when (looking-at diff-hunk-header-re) | |
| 437 | ;; Especially important for unified (because headers are ambiguous). | |
| 438 | (setq style (diff-hunk-style style)) | |
| 439 | (goto-char (match-end 0)) | |
| 440 | (when (and (not donttrustheader) (match-end 2)) | |
| 43392d12 SM |
441 | (let* ((nold (string-to-number (or (match-string 2) "1"))) |
| 442 | (nnew (string-to-number (or (match-string 4) "1"))) | |
| aec1ef07 | 443 | (endold |
| f52d2f9c SM |
444 | (save-excursion |
| 445 | (re-search-forward (if diff-valid-unified-empty-line | |
| 446 | "^[- \n]" "^[- ]") | |
| aec1ef07 SM |
447 | nil t nold) |
| 448 | (line-beginning-position 2))) | |
| 449 | (endnew | |
| 450 | ;; The hunk may end with a bunch of "+" lines, so the `end' is | |
| 451 | ;; then further than computed above. | |
| 452 | (save-excursion | |
| 453 | (re-search-forward (if diff-valid-unified-empty-line | |
| 454 | "^[+ \n]" "^[+ ]") | |
| 455 | nil t nnew) | |
| 456 | (line-beginning-position 2)))) | |
| 457 | (setq end (max endold endnew))))) | |
| f52d2f9c SM |
458 | ;; We may have a first evaluation of `end' thanks to the hunk header. |
| 459 | (unless end | |
| 460 | (setq end (and (re-search-forward | |
| 461 | (case style | |
| 462 | (unified (concat (if diff-valid-unified-empty-line | |
| 463 | "^[^-+# \\\n]\\|" "^[^-+# \\]\\|") | |
| 464 | ;; A `unified' header is ambiguous. | |
| 465 | diff-file-header-re)) | |
| 466 | (context "^[^-+#! \\]") | |
| 467 | (normal "^[^<>#\\]") | |
| 468 | (t "^[^-+#!<> \\]")) | |
| 469 | nil t) | |
| 470 | (match-beginning 0))) | |
| 471 | (when diff-valid-unified-empty-line | |
| 472 | ;; While empty lines may be valid inside hunks, they are also likely | |
| 473 | ;; to be unrelated to the hunk. | |
| 474 | (goto-char (or end (point-max))) | |
| 475 | (while (eq ?\n (char-before (1- (point)))) | |
| 476 | (forward-char -1) | |
| 477 | (setq end (point))))) | |
| 0e104800 SM |
478 | ;; The return value is used by easy-mmode-define-navigation. |
| 479 | (goto-char (or end (point-max))))) | |
| 610a6418 | 480 | |
| fd691799 SM |
481 | (defun diff-beginning-of-hunk (&optional try-harder) |
| 482 | "Move back to beginning of hunk. | |
| 483 | If TRY-HARDER is non-nil, try to cater to the case where we're not in a hunk | |
| 484 | but in the file header instead, in which case move forward to the first hunk." | |
| 610a6418 SM |
485 | (beginning-of-line) |
| 486 | (unless (looking-at diff-hunk-header-re) | |
| 487 | (forward-line 1) | |
| 488 | (condition-case () | |
| 489 | (re-search-backward diff-hunk-header-re) | |
| fd691799 SM |
490 | (error |
| 491 | (if (not try-harder) | |
| 492 | (error "Can't find the beginning of the hunk") | |
| 493 | (diff-beginning-of-file-and-junk) | |
| 494 | (diff-hunk-next)))))) | |
| 610a6418 | 495 | |
| f151b310 SM |
496 | (defun diff-unified-hunk-p () |
| 497 | (save-excursion | |
| 498 | (ignore-errors | |
| 499 | (diff-beginning-of-hunk) | |
| 500 | (looking-at "^@@")))) | |
| 501 | ||
| 610a6418 SM |
502 | (defun diff-beginning-of-file () |
| 503 | (beginning-of-line) | |
| 504 | (unless (looking-at diff-file-header-re) | |
| 4c969f97 SM |
505 | (let ((start (point)) |
| 506 | res) | |
| 507 | ;; diff-file-header-re may need to match up to 4 lines, so in case | |
| 508 | ;; we're inside the header, we need to move up to 3 lines forward. | |
| 509 | (forward-line 3) | |
| 510 | (if (and (setq res (re-search-backward diff-file-header-re nil t)) | |
| 511 | ;; Maybe the 3 lines forward were too much and we matched | |
| 512 | ;; a file header after our starting point :-( | |
| 513 | (or (<= (point) start) | |
| 514 | (setq res (re-search-backward diff-file-header-re nil t)))) | |
| 515 | res | |
| 516 | (goto-char start) | |
| 517 | (error "Can't find the beginning of the file"))))) | |
| 518 | ||
| 610a6418 SM |
519 | |
| 520 | (defun diff-end-of-file () | |
| 0e104800 | 521 | (re-search-forward "^[-+#!<>0-9@* \\]" nil t) |
| 22cd1973 SM |
522 | (re-search-forward (concat "^[^-+#!<>0-9@* \\]\\|" diff-file-header-re) |
| 523 | nil 'move) | |
| 524 | (if (match-beginning 1) | |
| 525 | (goto-char (match-beginning 1)) | |
| 526 | (beginning-of-line))) | |
| 610a6418 | 527 | |
| d87e5627 SM |
528 | ;; Define diff-{hunk,file}-{prev,next} |
| 529 | (easy-mmode-define-navigation | |
| 2659df68 SM |
530 | diff-hunk diff-hunk-header-re "hunk" diff-end-of-hunk diff-restrict-view |
| 531 | (if diff-auto-refine | |
| 532 | (condition-case-no-debug nil (diff-refine-hunk) (error nil)))) | |
| 533 | ||
| d87e5627 SM |
534 | (easy-mmode-define-navigation |
| 535 | diff-file diff-file-header-re "file" diff-end-of-hunk) | |
| 610a6418 SM |
536 | |
| 537 | (defun diff-restrict-view (&optional arg) | |
| 538 | "Restrict the view to the current hunk. | |
| 539 | If the prefix ARG is given, restrict the view to the current file instead." | |
| 540 | (interactive "P") | |
| 541 | (save-excursion | |
| fd691799 | 542 | (if arg (diff-beginning-of-file) (diff-beginning-of-hunk 'try-harder)) |
| 610a6418 SM |
543 | (narrow-to-region (point) |
| 544 | (progn (if arg (diff-end-of-file) (diff-end-of-hunk)) | |
| 545 | (point))) | |
| 546 | (set (make-local-variable 'diff-narrowed-to) (if arg 'file 'hunk)))) | |
| 547 | ||
| 548 | ||
| d87e5627 | 549 | (defun diff-hunk-kill () |
| 610a6418 SM |
550 | "Kill current hunk." |
| 551 | (interactive) | |
| 552 | (diff-beginning-of-hunk) | |
| 1eabc5e6 | 553 | (let* ((start (point)) |
| 22cd1973 SM |
554 | (nexthunk (when (re-search-forward diff-hunk-header-re nil t) |
| 555 | (match-beginning 0))) | |
| 1eabc5e6 SM |
556 | (firsthunk (ignore-errors |
| 557 | (goto-char start) | |
| 558 | (diff-beginning-of-file) (diff-hunk-next) (point))) | |
| dd24cb37 CY |
559 | (nextfile (ignore-errors (diff-file-next) (point))) |
| 560 | (inhibit-read-only t)) | |
| 1eabc5e6 | 561 | (goto-char start) |
| 610a6418 SM |
562 | (if (and firsthunk (= firsthunk start) |
| 563 | (or (null nexthunk) | |
| 564 | (and nextfile (> nexthunk nextfile)))) | |
| 1eabc5e6 | 565 | ;; It's the only hunk for this file, so kill the file. |
| d87e5627 | 566 | (diff-file-kill) |
| 610a6418 SM |
567 | (diff-end-of-hunk) |
| 568 | (kill-region start (point))))) | |
| 569 | ||
| 8d73b84e DN |
570 | ;; "index ", "old mode", "new mode", "new file mode" and |
| 571 | ;; "deleted file mode" are output by git-diff. | |
| 2f745f7f | 572 | (defconst diff-file-junk-re |
| 8d73b84e | 573 | "diff \\|index \\|\\(?:deleted file\\|new\\(?: file\\)?\\|old\\) mode") |
| f52d2f9c | 574 | |
| fd691799 SM |
575 | (defun diff-beginning-of-file-and-junk () |
| 576 | "Go to the beginning of file-related diff-info. | |
| 577 | This is like `diff-beginning-of-file' except it tries to skip back over leading | |
| 578 | data such as \"Index: ...\" and such." | |
| f52d2f9c SM |
579 | (let* ((orig (point)) |
| 580 | ;; Skip forward over what might be "leading junk" so as to get | |
| 581 | ;; closer to the actual diff. | |
| 582 | (_ (progn (beginning-of-line) | |
| 583 | (while (looking-at diff-file-junk-re) | |
| 584 | (forward-line 1)))) | |
| 585 | (start (point)) | |
| 4c969f97 SM |
586 | (prevfile (condition-case err |
| 587 | (save-excursion (diff-beginning-of-file) (point)) | |
| 588 | (error err))) | |
| 589 | (err (if (consp prevfile) prevfile)) | |
| 590 | (nextfile (ignore-errors | |
| 591 | (save-excursion | |
| 592 | (goto-char start) (diff-file-next) (point)))) | |
| 593 | ;; prevhunk is one of the limits. | |
| 594 | (prevhunk (save-excursion | |
| 595 | (ignore-errors | |
| 596 | (if (numberp prevfile) (goto-char prevfile)) | |
| 597 | (diff-hunk-prev) (point)))) | |
| 598 | (previndex (save-excursion | |
| f52d2f9c | 599 | (forward-line 1) ;In case we're looking at "Index:". |
| 4c969f97 SM |
600 | (re-search-backward "^Index: " prevhunk t)))) |
| 601 | ;; If we're in the junk, we should use nextfile instead of prevfile. | |
| 602 | (if (and (numberp nextfile) | |
| 603 | (or (not (numberp prevfile)) | |
| 604 | (and previndex (> previndex prevfile)))) | |
| 605 | (setq prevfile nextfile)) | |
| 606 | (if (and previndex (numberp prevfile) (< previndex prevfile)) | |
| 607 | (setq prevfile previndex)) | |
| 608 | (if (and (numberp prevfile) (<= prevfile start)) | |
| f52d2f9c SM |
609 | (progn |
| 610 | (goto-char prevfile) | |
| 611 | ;; Now skip backward over the leading junk we may have before the | |
| 612 | ;; diff itself. | |
| 613 | (while (save-excursion | |
| 614 | (and (zerop (forward-line -1)) | |
| 615 | (looking-at diff-file-junk-re))) | |
| 616 | (forward-line -1))) | |
| 4c969f97 SM |
617 | ;; File starts *after* the starting point: we really weren't in |
| 618 | ;; a file diff but elsewhere. | |
| f52d2f9c | 619 | (goto-char orig) |
| 4c969f97 | 620 | (signal (car err) (cdr err))))) |
| fd691799 | 621 | |
| d87e5627 | 622 | (defun diff-file-kill () |
| 610a6418 SM |
623 | "Kill current file's hunks." |
| 624 | (interactive) | |
| f52d2f9c SM |
625 | (let ((orig (point)) |
| 626 | (start (progn (diff-beginning-of-file-and-junk) (point))) | |
| dd24cb37 | 627 | (inhibit-read-only t)) |
| 610a6418 | 628 | (diff-end-of-file) |
| 22cd1973 | 629 | (if (looking-at "^\n") (forward-char 1)) ;`tla' generates such diffs. |
| f52d2f9c | 630 | (if (> orig (point)) (error "Not inside a file diff")) |
| 610a6418 SM |
631 | (kill-region start (point)))) |
| 632 | ||
| fef8c55b SM |
633 | (defun diff-kill-junk () |
| 634 | "Kill spurious empty diffs." | |
| 635 | (interactive) | |
| 636 | (save-excursion | |
| 637 | (let ((inhibit-read-only t)) | |
| 638 | (goto-char (point-min)) | |
| 639 | (while (re-search-forward (concat "^\\(Index: .*\n\\)" | |
| 640 | "\\([^-+!* <>].*\n\\)*?" | |
| 641 | "\\(\\(Index:\\) \\|" | |
| 642 | diff-file-header-re "\\)") | |
| 643 | nil t) | |
| 644 | (delete-region (if (match-end 4) (match-beginning 0) (match-end 1)) | |
| 645 | (match-beginning 3)) | |
| 646 | (beginning-of-line))))) | |
| 647 | ||
| cd632e57 SM |
648 | (defun diff-count-matches (re start end) |
| 649 | (save-excursion | |
| 650 | (let ((n 0)) | |
| 651 | (goto-char start) | |
| 652 | (while (re-search-forward re end t) (incf n)) | |
| 653 | n))) | |
| 654 | ||
| f151b310 SM |
655 | (defun diff-splittable-p () |
| 656 | (save-excursion | |
| 657 | (beginning-of-line) | |
| 658 | (and (looking-at "^[-+ ]") | |
| 659 | (progn (forward-line -1) (looking-at "^[-+ ]")) | |
| 660 | (diff-unified-hunk-p)))) | |
| 661 | ||
| cd632e57 SM |
662 | (defun diff-split-hunk () |
| 663 | "Split the current (unified diff) hunk at point into two hunks." | |
| 664 | (interactive) | |
| 665 | (beginning-of-line) | |
| 666 | (let ((pos (point)) | |
| 667 | (start (progn (diff-beginning-of-hunk) (point)))) | |
| f52d2f9c | 668 | (unless (looking-at diff-hunk-header-re-unified) |
| cd632e57 SM |
669 | (error "diff-split-hunk only works on unified context diffs")) |
| 670 | (forward-line 1) | |
| 671 | (let* ((start1 (string-to-number (match-string 1))) | |
| f52d2f9c | 672 | (start2 (string-to-number (match-string 3))) |
| cd632e57 | 673 | (newstart1 (+ start1 (diff-count-matches "^[- \t]" (point) pos))) |
| dd24cb37 CY |
674 | (newstart2 (+ start2 (diff-count-matches "^[+ \t]" (point) pos))) |
| 675 | (inhibit-read-only t)) | |
| cd632e57 SM |
676 | (goto-char pos) |
| 677 | ;; Hopefully the after-change-function will not screw us over. | |
| 678 | (insert "@@ -" (number-to-string newstart1) ",1 +" | |
| 679 | (number-to-string newstart2) ",1 @@\n") | |
| 680 | ;; Fix the original hunk-header. | |
| 681 | (diff-fixup-modifs start pos)))) | |
| 71296446 | 682 | |
| cd632e57 | 683 | |
| 610a6418 SM |
684 | ;;;; |
| 685 | ;;;; jump to other buffers | |
| 686 | ;;;; | |
| 687 | ||
| 0b82e382 | 688 | (defvar diff-remembered-files-alist nil) |
| adf4cc7e | 689 | (defvar diff-remembered-defdir nil) |
| 0b82e382 | 690 | |
| 610a6418 SM |
691 | (defun diff-filename-drop-dir (file) |
| 692 | (when (string-match "/" file) (substring file (match-end 0)))) | |
| 693 | ||
| 0b82e382 SM |
694 | (defun diff-merge-strings (ancestor from to) |
| 695 | "Merge the diff between ANCESTOR and FROM into TO. | |
| 696 | Returns the merged string if successful or nil otherwise. | |
| d87e5627 | 697 | The strings are assumed not to contain any \"\\n\" (i.e. end of line). |
| 0b82e382 SM |
698 | If ANCESTOR = FROM, returns TO. |
| 699 | If ANCESTOR = TO, returns FROM. | |
| 700 | The heuristic is simplistic and only really works for cases | |
| 701 | like \(diff-merge-strings \"b/foo\" \"b/bar\" \"/a/c/foo\")." | |
| 702 | ;; Ideally, we want: | |
| 703 | ;; AMB ANB CMD -> CND | |
| 704 | ;; but that's ambiguous if `foo' or `bar' is empty: | |
| 705 | ;; a/foo a/foo1 b/foo.c -> b/foo1.c but not 1b/foo.c or b/foo.c1 | |
| d87e5627 | 706 | (let ((str (concat ancestor "\n" from "\n" to))) |
| 0b82e382 | 707 | (when (and (string-match (concat |
| d87e5627 SM |
708 | "\\`\\(.*?\\)\\(.*\\)\\(.*\\)\n" |
| 709 | "\\1\\(.*\\)\\3\n" | |
| 0b82e382 SM |
710 | "\\(.*\\(\\2\\).*\\)\\'") str) |
| 711 | (equal to (match-string 5 str))) | |
| 712 | (concat (substring str (match-beginning 5) (match-beginning 6)) | |
| 713 | (match-string 4 str) | |
| 714 | (substring str (match-end 6) (match-end 5)))))) | |
| 715 | ||
| 22cd1973 SM |
716 | (defun diff-tell-file-name (old name) |
| 717 | "Tell Emacs where the find the source file of the current hunk. | |
| 718 | If the OLD prefix arg is passed, tell the file NAME of the old file." | |
| 719 | (interactive | |
| 720 | (let* ((old current-prefix-arg) | |
| 721 | (fs (diff-hunk-file-names current-prefix-arg))) | |
| 722 | (unless fs (error "No file name to look for")) | |
| 723 | (list old (read-file-name (format "File for %s: " (car fs)) | |
| 724 | nil (diff-find-file-name old) t)))) | |
| 725 | (let ((fs (diff-hunk-file-names old))) | |
| 726 | (unless fs (error "No file name to look for")) | |
| 727 | (push (cons fs name) diff-remembered-files-alist))) | |
| cfc80227 | 728 | |
| 22cd1973 SM |
729 | (defun diff-hunk-file-names (&optional old) |
| 730 | "Give the list of file names textually mentioned for the current hunk." | |
| 610a6418 SM |
731 | (save-excursion |
| 732 | (unless (looking-at diff-file-header-re) | |
| 733 | (or (ignore-errors (diff-beginning-of-file)) | |
| 734 | (re-search-forward diff-file-header-re nil t))) | |
| 22cd1973 | 735 | (let ((limit (save-excursion |
| 610a6418 | 736 | (condition-case () |
| d87e5627 | 737 | (progn (diff-hunk-prev) (point)) |
| 610a6418 | 738 | (error (point-min))))) |
| 22cd1973 SM |
739 | (header-files |
| 740 | (if (looking-at "[-*][-*][-*] \\(\\S-+\\)\\(\\s-.*\\)?\n[-+][-+][-+] \\(\\S-+\\)") | |
| 741 | (list (if old (match-string 1) (match-string 3)) | |
| 742 | (if old (match-string 3) (match-string 1))) | |
| 743 | (forward-line 1) nil))) | |
| 744 | (delq nil | |
| 745 | (append | |
| 746 | (when (and (not old) | |
| 747 | (save-excursion | |
| 748 | (re-search-backward "^Index: \\(.+\\)" limit t))) | |
| 749 | (list (match-string 1))) | |
| 750 | header-files | |
| 751 | (when (re-search-backward | |
| 752 | "^diff \\(-\\S-+ +\\)*\\(\\S-+\\)\\( +\\(\\S-+\\)\\)?" | |
| 753 | nil t) | |
| 754 | (list (if old (match-string 2) (match-string 4)) | |
| 755 | (if old (match-string 4) (match-string 2))))))))) | |
| 756 | ||
| e4456fdf | 757 | (defun diff-find-file-name (&optional old batch prefix) |
| 22cd1973 | 758 | "Return the file corresponding to the current patch. |
| e78cf8e5 | 759 | Non-nil OLD means that we want the old file. |
| e4456fdf SM |
760 | Non-nil BATCH means to prefer returning an incorrect answer than to prompt |
| 761 | the user. | |
| e78cf8e5 | 762 | PREFIX is only used internally: don't use it." |
| adf4cc7e SM |
763 | (unless (equal diff-remembered-defdir default-directory) |
| 764 | ;; Flush diff-remembered-files-alist if the default-directory is changed. | |
| 765 | (set (make-local-variable 'diff-remembered-defdir) default-directory) | |
| 766 | (set (make-local-variable 'diff-remembered-files-alist) nil)) | |
| 22cd1973 SM |
767 | (save-excursion |
| 768 | (unless (looking-at diff-file-header-re) | |
| 769 | (or (ignore-errors (diff-beginning-of-file)) | |
| 770 | (re-search-forward diff-file-header-re nil t))) | |
| 771 | (let ((fs (diff-hunk-file-names old))) | |
| e78cf8e5 | 772 | (if prefix (setq fs (mapcar (lambda (f) (concat prefix f)) fs))) |
| 610a6418 | 773 | (or |
| 0b82e382 SM |
774 | ;; use any previously used preference |
| 775 | (cdr (assoc fs diff-remembered-files-alist)) | |
| 776 | ;; try to be clever and use previous choices as an inspiration | |
| 777 | (dolist (rf diff-remembered-files-alist) | |
| 778 | (let ((newfile (diff-merge-strings (caar rf) (car fs) (cdr rf)))) | |
| 779 | (if (and newfile (file-exists-p newfile)) (return newfile)))) | |
| 780 | ;; look for each file in turn. If none found, try again but | |
| 781 | ;; ignoring the first level of directory, ... | |
| 782 | (do* ((files fs (delq nil (mapcar 'diff-filename-drop-dir files))) | |
| 783 | (file nil nil)) | |
| 784 | ((or (null files) | |
| 785 | (setq file (do* ((files files (cdr files)) | |
| 786 | (file (car files) (car files))) | |
| f9274544 GM |
787 | ;; Use file-regular-p to avoid |
| 788 | ;; /dev/null, directories, etc. | |
| 789 | ((or (null file) (file-regular-p file)) | |
| 0b82e382 SM |
790 | file)))) |
| 791 | file)) | |
| 792 | ;; <foo>.rej patches implicitly apply to <foo> | |
| 610a6418 SM |
793 | (and (string-match "\\.rej\\'" (or buffer-file-name "")) |
| 794 | (let ((file (substring buffer-file-name 0 (match-beginning 0)))) | |
| 795 | (when (file-exists-p file) file))) | |
| e78cf8e5 SM |
796 | ;; If we haven't found the file, maybe it's because we haven't paid |
| 797 | ;; attention to the PCL-CVS hint. | |
| 798 | (and (not prefix) | |
| 799 | (boundp 'cvs-pcl-cvs-dirchange-re) | |
| 800 | (save-excursion | |
| 801 | (re-search-backward cvs-pcl-cvs-dirchange-re nil t)) | |
| e4456fdf SM |
802 | (diff-find-file-name old batch (match-string 1))) |
| 803 | ;; Invent something, if necessary. | |
| 804 | (when batch | |
| 805 | (or (car fs) default-directory)) | |
| 0b82e382 SM |
806 | ;; if all else fails, ask the user |
| 807 | (let ((file (read-file-name (format "Use file %s: " (or (first fs) "")) | |
| 808 | nil (first fs) t (first fs)))) | |
| 809 | (set (make-local-variable 'diff-remembered-files-alist) | |
| 810 | (cons (cons fs file) diff-remembered-files-alist)) | |
| 610a6418 SM |
811 | file))))) |
| 812 | ||
| 1b1b5dae | 813 | |
| 610a6418 SM |
814 | (defun diff-ediff-patch () |
| 815 | "Call `ediff-patch-file' on the current buffer." | |
| 816 | (interactive) | |
| 817 | (condition-case err | |
| 0e104800 | 818 | (ediff-patch-file nil (current-buffer)) |
| 610a6418 SM |
819 | (wrong-number-of-arguments (ediff-patch-file)))) |
| 820 | ||
| 71296446 | 821 | ;;;; |
| 610a6418 | 822 | ;;;; Conversion functions |
| 71296446 | 823 | ;;;; |
| 610a6418 SM |
824 | |
| 825 | ;;(defvar diff-inhibit-after-change nil | |
| 826 | ;; "Non-nil means inhibit `diff-mode's after-change functions.") | |
| 827 | ||
| 828 | (defun diff-unified->context (start end) | |
| 829 | "Convert unified diffs to context diffs. | |
| 830 | START and END are either taken from the region (if a prefix arg is given) or | |
| dfbd373d | 831 | else cover the whole buffer." |
| a70b0ff8 JL |
832 | (interactive (if (or current-prefix-arg (and transient-mark-mode mark-active)) |
| 833 | (list (region-beginning) (region-end)) | |
| 610a6418 | 834 | (list (point-min) (point-max)))) |
| e78cf8e5 | 835 | (unless (markerp end) (setq end (copy-marker end t))) |
| 610a6418 SM |
836 | (let (;;(diff-inhibit-after-change t) |
| 837 | (inhibit-read-only t)) | |
| 838 | (save-excursion | |
| 839 | (goto-char start) | |
| f52d2f9c SM |
840 | (while (and (re-search-forward |
| 841 | (concat "^\\(\\(---\\) .+\n\\(\\+\\+\\+\\) .+\\|" | |
| 842 | diff-hunk-header-re-unified ".*\\)$") | |
| 843 | nil t) | |
| 610a6418 SM |
844 | (< (point) end)) |
| 845 | (combine-after-change-calls | |
| 846 | (if (match-beginning 2) | |
| 0e104800 | 847 | ;; we matched a file header |
| 610a6418 SM |
848 | (progn |
| 849 | ;; use reverse order to make sure the indices are kept valid | |
| 850 | (replace-match "---" t t nil 3) | |
| 851 | (replace-match "***" t t nil 2)) | |
| 852 | ;; we matched a hunk header | |
| 853 | (let ((line1 (match-string 4)) | |
| 43392d12 | 854 | (lines1 (or (match-string 5) "1")) |
| 610a6418 | 855 | (line2 (match-string 6)) |
| 341dd15a | 856 | (lines2 (or (match-string 7) "1")) |
| 3dc04e83 SM |
857 | ;; Variables to use the special undo function. |
| 858 | (old-undo buffer-undo-list) | |
| 859 | (old-end (marker-position end)) | |
| 860 | (start (match-beginning 0)) | |
| 861 | (reversible t)) | |
| 610a6418 SM |
862 | (replace-match |
| 863 | (concat "***************\n*** " line1 "," | |
| 864 | (number-to-string (+ (string-to-number line1) | |
| 865 | (string-to-number lines1) | |
| 341dd15a MB |
866 | -1)) |
| 867 | " ****")) | |
| 610a6418 | 868 | (save-restriction |
| f52d2f9c SM |
869 | (narrow-to-region (line-beginning-position 2) |
| 870 | ;; Call diff-end-of-hunk from just before | |
| 871 | ;; the hunk header so it can use the hunk | |
| 872 | ;; header info. | |
| 610a6418 SM |
873 | (progn (diff-end-of-hunk 'unified) (point))) |
| 874 | (let ((hunk (buffer-string))) | |
| 875 | (goto-char (point-min)) | |
| 876 | (if (not (save-excursion (re-search-forward "^-" nil t))) | |
| 877 | (delete-region (point) (point-max)) | |
| 878 | (goto-char (point-max)) | |
| 879 | (let ((modif nil) last-pt) | |
| 880 | (while (progn (setq last-pt (point)) | |
| 881 | (= (forward-line -1) 0)) | |
| 882 | (case (char-after) | |
| bdad2e31 | 883 | (?\s (insert " ") (setq modif nil) (backward-char 1)) |
| 610a6418 SM |
884 | (?+ (delete-region (point) last-pt) (setq modif t)) |
| 885 | (?- (if (not modif) | |
| 886 | (progn (forward-char 1) | |
| 887 | (insert " ")) | |
| 888 | (delete-char 1) | |
| 889 | (insert "! ")) | |
| 890 | (backward-char 2)) | |
| 891 | (?\\ (when (save-excursion (forward-line -1) | |
| 892 | (= (char-after) ?+)) | |
| 893 | (delete-region (point) last-pt) (setq modif t))) | |
| f52d2f9c SM |
894 | ;; diff-valid-unified-empty-line. |
| 895 | (?\n (insert " ") (setq modif nil) (backward-char 2)) | |
| 610a6418 SM |
896 | (t (setq modif nil)))))) |
| 897 | (goto-char (point-max)) | |
| 898 | (save-excursion | |
| 899 | (insert "--- " line2 "," | |
| 900 | (number-to-string (+ (string-to-number line2) | |
| 901 | (string-to-number lines2) | |
| 341dd15a | 902 | -1)) |
| f52d2f9c | 903 | " ----\n" hunk)) |
| 610a6418 SM |
904 | ;;(goto-char (point-min)) |
| 905 | (forward-line 1) | |
| 906 | (if (not (save-excursion (re-search-forward "^+" nil t))) | |
| 907 | (delete-region (point) (point-max)) | |
| 908 | (let ((modif nil) (delete nil)) | |
| 3dc04e83 SM |
909 | (if (save-excursion (re-search-forward "^\\+.*\n-" nil t)) |
| 910 | ;; Normally, lines in a substitution come with | |
| 911 | ;; first the removals and then the additions, and | |
| 912 | ;; the context->unified function follows this | |
| 913 | ;; convention, of course. Yet, other alternatives | |
| 914 | ;; are valid as well, but they preclude the use of | |
| 915 | ;; context->unified as an undo command. | |
| 916 | (setq reversible nil)) | |
| 610a6418 SM |
917 | (while (not (eobp)) |
| 918 | (case (char-after) | |
| bdad2e31 | 919 | (?\s (insert " ") (setq modif nil) (backward-char 1)) |
| 610a6418 SM |
920 | (?- (setq delete t) (setq modif t)) |
| 921 | (?+ (if (not modif) | |
| 922 | (progn (forward-char 1) | |
| 923 | (insert " ")) | |
| 924 | (delete-char 1) | |
| 925 | (insert "! ")) | |
| 926 | (backward-char 2)) | |
| 927 | (?\\ (when (save-excursion (forward-line 1) | |
| 928 | (not (eobp))) | |
| 929 | (setq delete t) (setq modif t))) | |
| f52d2f9c SM |
930 | ;; diff-valid-unified-empty-line. |
| 931 | (?\n (insert " ") (setq modif nil) (backward-char 2) | |
| 932 | (setq reversible nil)) | |
| 610a6418 SM |
933 | (t (setq modif nil))) |
| 934 | (let ((last-pt (point))) | |
| 935 | (forward-line 1) | |
| 936 | (when delete | |
| 937 | (delete-region last-pt (point)) | |
| 3dc04e83 SM |
938 | (setq delete nil))))))) |
| 939 | (unless (or (not reversible) (eq buffer-undo-list t)) | |
| 940 | ;; Drop the many undo entries and replace them with | |
| 941 | ;; a single entry that uses diff-context->unified to do | |
| 942 | ;; the work. | |
| 943 | (setq buffer-undo-list | |
| 944 | (cons (list 'apply (- old-end end) start (point-max) | |
| 945 | 'diff-context->unified start (point-max)) | |
| 946 | old-undo))))))))))) | |
| 610a6418 | 947 | |
| 28408bfd | 948 | (defun diff-context->unified (start end &optional to-context) |
| 610a6418 | 949 | "Convert context diffs to unified diffs. |
| 28408bfd RS |
950 | START and END are either taken from the region |
| 951 | \(when it is highlighted) or else cover the whole buffer. | |
| 952 | With a prefix argument, convert unified format to context format." | |
| 953 | (interactive (if (and transient-mark-mode mark-active) | |
| a70b0ff8 | 954 | (list (region-beginning) (region-end) current-prefix-arg) |
| 28408bfd RS |
955 | (list (point-min) (point-max) current-prefix-arg))) |
| 956 | (if to-context | |
| 957 | (diff-unified->context start end) | |
| e78cf8e5 | 958 | (unless (markerp end) (setq end (copy-marker end t))) |
| 28408bfd | 959 | (let ( ;;(diff-inhibit-after-change t) |
| be36f934 | 960 | (inhibit-read-only t)) |
| 28408bfd | 961 | (save-excursion |
| be36f934 SM |
962 | (goto-char start) |
| 963 | (while (and (re-search-forward "^\\(\\(\\*\\*\\*\\) .+\n\\(---\\) .+\\|\\*\\{15\\}.*\n\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]+\\) \\*\\*\\*\\*\\)$" nil t) | |
| 964 | (< (point) end)) | |
| 965 | (combine-after-change-calls | |
| 966 | (if (match-beginning 2) | |
| 967 | ;; we matched a file header | |
| 968 | (progn | |
| 969 | ;; use reverse order to make sure the indices are kept valid | |
| 970 | (replace-match "+++" t t nil 3) | |
| 971 | (replace-match "---" t t nil 2)) | |
| 972 | ;; we matched a hunk header | |
| 973 | (let ((line1s (match-string 4)) | |
| 974 | (line1e (match-string 5)) | |
| 975 | (pt1 (match-beginning 0)) | |
| 976 | ;; Variables to use the special undo function. | |
| 977 | (old-undo buffer-undo-list) | |
| 978 | (old-end (marker-position end)) | |
| 979 | (reversible t)) | |
| 980 | (replace-match "") | |
| 981 | (unless (re-search-forward | |
| 982 | "^--- \\([0-9]+\\),\\(-?[0-9]+\\) ----$" nil t) | |
| 983 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 984 | (let ((line2s (match-string 1)) | |
| 985 | (line2e (match-string 2)) | |
| 986 | (pt2 (progn | |
| 987 | (delete-region (progn (beginning-of-line) (point)) | |
| 988 | (progn (forward-line 1) (point))) | |
| 989 | (point-marker)))) | |
| 990 | (goto-char pt1) | |
| 991 | (forward-line 1) | |
| 992 | (while (< (point) pt2) | |
| 993 | (case (char-after) | |
| 994 | (?! (delete-char 2) (insert "-") (forward-line 1)) | |
| 995 | (?- (forward-char 1) (delete-char 1) (forward-line 1)) | |
| 996 | (?\s ;merge with the other half of the chunk | |
| 997 | (let* ((endline2 | |
| 998 | (save-excursion | |
| 999 | (goto-char pt2) (forward-line 1) (point)))) | |
| 1000 | (case (char-after pt2) | |
| 1001 | ((?! ?+) | |
| 1002 | (insert "+" | |
| 1003 | (prog1 (buffer-substring (+ pt2 2) endline2) | |
| 1004 | (delete-region pt2 endline2)))) | |
| 1005 | (?\s | |
| 1006 | (unless (= (- endline2 pt2) | |
| 1007 | (- (line-beginning-position 2) (point))) | |
| 1008 | ;; If the two lines we're merging don't have the | |
| 1009 | ;; same length (can happen with "diff -b"), then | |
| 1010 | ;; diff-unified->context will not properly undo | |
| 1011 | ;; this operation. | |
| 1012 | (setq reversible nil)) | |
| 1013 | (delete-region pt2 endline2) | |
| 1014 | (delete-char 1) | |
| 1015 | (forward-line 1)) | |
| 1016 | (?\\ (forward-line 1)) | |
| 1017 | (t (setq reversible nil) | |
| 1018 | (delete-char 1) (forward-line 1))))) | |
| 1019 | (t (setq reversible nil) (forward-line 1)))) | |
| 1020 | (while (looking-at "[+! ] ") | |
| 1021 | (if (/= (char-after) ?!) (forward-char 1) | |
| 1022 | (delete-char 1) (insert "+")) | |
| 1023 | (delete-char 1) (forward-line 1)) | |
| 1024 | (save-excursion | |
| 1025 | (goto-char pt1) | |
| 1026 | (insert "@@ -" line1s "," | |
| 1027 | (number-to-string (- (string-to-number line1e) | |
| 1028 | (string-to-number line1s) | |
| 1029 | -1)) | |
| 1030 | " +" line2s "," | |
| 1031 | (number-to-string (- (string-to-number line2e) | |
| 1032 | (string-to-number line2s) | |
| 1033 | -1)) " @@")) | |
| 1034 | (set-marker pt2 nil) | |
| 1035 | ;; The whole procedure succeeded, let's replace the myriad | |
| 1036 | ;; of undo elements with just a single special one. | |
| 1037 | (unless (or (not reversible) (eq buffer-undo-list t)) | |
| 1038 | (setq buffer-undo-list | |
| 1039 | (cons (list 'apply (- old-end end) pt1 (point) | |
| 1040 | 'diff-unified->context pt1 (point)) | |
| 1041 | old-undo))) | |
| 1042 | ))))))))) | |
| 610a6418 SM |
1043 | |
| 1044 | (defun diff-reverse-direction (start end) | |
| 1045 | "Reverse the direction of the diffs. | |
| 1046 | START and END are either taken from the region (if a prefix arg is given) or | |
| dfbd373d | 1047 | else cover the whole buffer." |
| a70b0ff8 JL |
1048 | (interactive (if (or current-prefix-arg (and transient-mark-mode mark-active)) |
| 1049 | (list (region-beginning) (region-end)) | |
| 610a6418 | 1050 | (list (point-min) (point-max)))) |
| e78cf8e5 | 1051 | (unless (markerp end) (setq end (copy-marker end t))) |
| 610a6418 SM |
1052 | (let (;;(diff-inhibit-after-change t) |
| 1053 | (inhibit-read-only t)) | |
| 1054 | (save-excursion | |
| 1055 | (goto-char start) | |
| c0078a04 | 1056 | (while (and (re-search-forward "^\\(\\([-*][-*][-*] \\)\\(.+\\)\n\\([-+][-+][-+] \\)\\(.+\\)\\|\\*\\{15\\}.*\n\\*\\*\\* \\(.+\\) \\*\\*\\*\\*\\|@@ -\\([0-9,]+\\) \\+\\([0-9,]+\\) @@.*\\)$" nil t) |
| 610a6418 SM |
1057 | (< (point) end)) |
| 1058 | (combine-after-change-calls | |
| 1059 | (cond | |
| 1060 | ;; a file header | |
| 1061 | ((match-beginning 2) (replace-match "\\2\\5\n\\4\\3" nil)) | |
| 1062 | ;; a context-diff hunk header | |
| 1063 | ((match-beginning 6) | |
| 1064 | (let ((pt-lines1 (match-beginning 6)) | |
| 1065 | (lines1 (match-string 6))) | |
| 1066 | (replace-match "" nil nil nil 6) | |
| 1067 | (forward-line 1) | |
| 1068 | (let ((half1s (point))) | |
| 0e104800 | 1069 | (while (looking-at "[-! \\][ \t]\\|#") |
| 610a6418 SM |
1070 | (when (= (char-after) ?-) (delete-char 1) (insert "+")) |
| 1071 | (forward-line 1)) | |
| fef8c55b | 1072 | (let ((half1 (delete-and-extract-region half1s (point)))) |
| 610a6418 SM |
1073 | (unless (looking-at "^--- \\([0-9]+,-?[0-9]+\\) ----$") |
| 1074 | (insert half1) | |
| 1075 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 1076 | (let ((str1 (match-string 1))) | |
| 1077 | (replace-match lines1 nil nil nil 1) | |
| 1078 | (forward-line 1) | |
| 1079 | (let ((half2s (point))) | |
| 0e104800 | 1080 | (while (looking-at "[!+ \\][ \t]\\|#") |
| 610a6418 SM |
1081 | (when (= (char-after) ?+) (delete-char 1) (insert "-")) |
| 1082 | (forward-line 1)) | |
| fef8c55b | 1083 | (let ((half2 (delete-and-extract-region half2s (point)))) |
| 0e104800 | 1084 | (insert (or half1 "")) |
| 610a6418 | 1085 | (goto-char half1s) |
| 0e104800 | 1086 | (insert (or half2 "")))) |
| 610a6418 SM |
1087 | (goto-char pt-lines1) |
| 1088 | (insert str1)))))) | |
| 1089 | ;; a unified-diff hunk header | |
| 1090 | ((match-beginning 7) | |
| 1091 | (replace-match "@@ -\\8 +\\7 @@" nil) | |
| 1092 | (forward-line 1) | |
| 1093 | (let ((c (char-after)) first last) | |
| 1094 | (while (case (setq c (char-after)) | |
| 1095 | (?- (setq first (or first (point))) | |
| 1096 | (delete-char 1) (insert "+") t) | |
| 1097 | (?+ (setq last (or last (point))) | |
| 1098 | (delete-char 1) (insert "-") t) | |
| 0e104800 | 1099 | ((?\\ ?#) t) |
| 610a6418 | 1100 | (t (when (and first last (< first last)) |
| cb4e8176 | 1101 | (insert (delete-and-extract-region first last))) |
| 610a6418 | 1102 | (setq first nil last nil) |
| f52d2f9c SM |
1103 | (memq c (if diff-valid-unified-empty-line |
| 1104 | '(?\s ?\n) '(?\s))))) | |
| 610a6418 SM |
1105 | (forward-line 1)))))))))) |
| 1106 | ||
| 1107 | (defun diff-fixup-modifs (start end) | |
| 1108 | "Fixup the hunk headers (in case the buffer was modified). | |
| 1109 | START and END are either taken from the region (if a prefix arg is given) or | |
| dfbd373d | 1110 | else cover the whole buffer." |
| a70b0ff8 JL |
1111 | (interactive (if (or current-prefix-arg (and transient-mark-mode mark-active)) |
| 1112 | (list (region-beginning) (region-end)) | |
| 610a6418 SM |
1113 | (list (point-min) (point-max)))) |
| 1114 | (let ((inhibit-read-only t)) | |
| 1115 | (save-excursion | |
| f52d2f9c | 1116 | (goto-char end) (diff-end-of-hunk nil 'donttrustheader) |
| 610a6418 SM |
1117 | (let ((plus 0) (minus 0) (space 0) (bang 0)) |
| 1118 | (while (and (= (forward-line -1) 0) (<= start (point))) | |
| bd9d7d76 | 1119 | (if (not (looking-at |
| f52d2f9c | 1120 | (concat diff-hunk-header-re-unified |
| bd9d7d76 SM |
1121 | "\\|[-*][-*][-*] [0-9,]+ [-*][-*][-*][-*]$" |
| 1122 | "\\|--- .+\n\\+\\+\\+ "))) | |
| 610a6418 | 1123 | (case (char-after) |
| bd9d7d76 | 1124 | (?\s (incf space)) |
| 610a6418 SM |
1125 | (?+ (incf plus)) |
| 1126 | (?- (incf minus)) | |
| 1127 | (?! (incf bang)) | |
| 0e104800 | 1128 | ((?\\ ?#) nil) |
| 610a6418 SM |
1129 | (t (setq space 0 plus 0 minus 0 bang 0))) |
| 1130 | (cond | |
| f52d2f9c SM |
1131 | ((looking-at diff-hunk-header-re-unified) |
| 1132 | (let* ((old1 (match-string 2)) | |
| 1133 | (old2 (match-string 4)) | |
| 610a6418 SM |
1134 | (new1 (number-to-string (+ space minus))) |
| 1135 | (new2 (number-to-string (+ space plus)))) | |
| f52d2f9c SM |
1136 | (if old2 |
| 1137 | (unless (string= new2 old2) (replace-match new2 t t nil 4)) | |
| 1138 | (goto-char (match-end 4)) (insert "," new2)) | |
| 1139 | (if old1 | |
| 1140 | (unless (string= new1 old1) (replace-match new1 t t nil 2)) | |
| 1141 | (goto-char (match-end 2)) (insert "," new1)))) | |
| 610a6418 SM |
1142 | ((looking-at "--- \\([0-9]+\\),\\([0-9]*\\) ----$") |
| 1143 | (when (> (+ space bang plus) 0) | |
| 1144 | (let* ((old1 (match-string 1)) | |
| 1145 | (old2 (match-string 2)) | |
| 1146 | (new (number-to-string | |
| 1147 | (+ space bang plus -1 (string-to-number old1))))) | |
| 1148 | (unless (string= new old2) (replace-match new t t nil 2))))) | |
| 1149 | ((looking-at "\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]*\\) \\*\\*\\*\\*$") | |
| 1150 | (when (> (+ space bang minus) 0) | |
| 1151 | (let* ((old (match-string 1)) | |
| 1152 | (new (format | |
| 1153 | (concat "%0" (number-to-string (length old)) "d") | |
| 1154 | (+ space bang minus -1 (string-to-number old))))) | |
| 1155 | (unless (string= new old) (replace-match new t t nil 2)))))) | |
| 1156 | (setq space 0 plus 0 minus 0 bang 0))))))) | |
| 1157 | ||
| 71296446 | 1158 | ;;;; |
| 610a6418 | 1159 | ;;;; Hooks |
| 71296446 | 1160 | ;;;; |
| 610a6418 SM |
1161 | |
| 1162 | (defun diff-write-contents-hooks () | |
| 1163 | "Fixup hunk headers if necessary." | |
| 1164 | (if (buffer-modified-p) (diff-fixup-modifs (point-min) (point-max))) | |
| 1165 | nil) | |
| 1166 | ||
| 610a6418 SM |
1167 | ;; It turns out that making changes in the buffer from within an |
| 1168 | ;; *-change-function is asking for trouble, whereas making them | |
| 1169 | ;; from a post-command-hook doesn't pose much problems | |
| 1170 | (defvar diff-unhandled-changes nil) | |
| 1171 | (defun diff-after-change-function (beg end len) | |
| 1172 | "Remember to fixup the hunk header. | |
| 1173 | See `after-change-functions' for the meaning of BEG, END and LEN." | |
| c0078a04 SM |
1174 | ;; Ignoring changes when inhibit-read-only is set is strictly speaking |
| 1175 | ;; incorrect, but it turns out that inhibit-read-only is normally not set | |
| 1176 | ;; inside editing commands, while it tends to be set when the buffer gets | |
| 1177 | ;; updated by an async process or by a conversion function, both of which | |
| 1178 | ;; would rather not be uselessly slowed down by this hook. | |
| 610a6418 SM |
1179 | (when (and (not undo-in-progress) (not inhibit-read-only)) |
| 1180 | (if diff-unhandled-changes | |
| 1181 | (setq diff-unhandled-changes | |
| 1182 | (cons (min beg (car diff-unhandled-changes)) | |
| cb4e8176 | 1183 | (max end (cdr diff-unhandled-changes)))) |
| 610a6418 SM |
1184 | (setq diff-unhandled-changes (cons beg end))))) |
| 1185 | ||
| 1186 | (defun diff-post-command-hook () | |
| 1187 | "Fixup hunk headers if necessary." | |
| 1188 | (when (consp diff-unhandled-changes) | |
| 1189 | (ignore-errors | |
| 1190 | (save-excursion | |
| fef8c55b | 1191 | (goto-char (car diff-unhandled-changes)) |
| cb4e8176 SM |
1192 | ;; Maybe we've cut the end of the hunk before point. |
| 1193 | (if (and (bolp) (not (bobp))) (backward-char 1)) | |
| 1eabc5e6 SM |
1194 | ;; We used to fixup modifs on all the changes, but it turns out |
| 1195 | ;; that it's safer not to do it on big changes, for example | |
| 1196 | ;; when yanking a big diff, since we might then screw up perfectly | |
| 1197 | ;; correct values. -stef | |
| 1198 | ;; (unless (ignore-errors | |
| 1199 | ;; (diff-beginning-of-hunk) | |
| 1200 | ;; (save-excursion | |
| 1201 | ;; (diff-end-of-hunk) | |
| 1202 | ;; (> (point) (car diff-unhandled-changes)))) | |
| 1203 | ;; (goto-char (car diff-unhandled-changes)) | |
| 1204 | ;; (re-search-forward diff-hunk-header-re (cdr diff-unhandled-changes)) | |
| 1205 | ;; (diff-beginning-of-hunk)) | |
| 1206 | ;; (diff-fixup-modifs (point) (cdr diff-unhandled-changes)) | |
| 1207 | (diff-beginning-of-hunk) | |
| 1208 | (when (save-excursion | |
| f52d2f9c | 1209 | (diff-end-of-hunk nil 'donttrustheader) |
| cb4e8176 | 1210 | (>= (point) (cdr diff-unhandled-changes))) |
| 1eabc5e6 | 1211 | (diff-fixup-modifs (point) (cdr diff-unhandled-changes))))) |
| 610a6418 SM |
1212 | (setq diff-unhandled-changes nil))) |
| 1213 | ||
| 6fc049f6 SM |
1214 | (defun diff-next-error (arg reset) |
| 1215 | ;; Select a window that displays the current buffer so that point | |
| 1216 | ;; movements are reflected in that window. Otherwise, the user might | |
| 1217 | ;; never see the hunk corresponding to the source she's jumping to. | |
| 1218 | (pop-to-buffer (current-buffer)) | |
| 1219 | (if reset (goto-char (point-min))) | |
| 1220 | (diff-hunk-next arg) | |
| 1221 | (diff-goto-source)) | |
| 610a6418 | 1222 | |
| 610a6418 | 1223 | ;;;###autoload |
| d87e5627 | 1224 | (define-derived-mode diff-mode fundamental-mode "Diff" |
| 0b82e382 | 1225 | "Major mode for viewing/editing context diffs. |
| 769dd0f1 | 1226 | Supports unified and context diffs as well as (to a lesser extent) |
| 6035b97e | 1227 | normal diffs. |
| b64d66b5 | 1228 | |
| df52e0e7 | 1229 | When the buffer is read-only, the ESC prefix is not necessary. |
| 3b696504 | 1230 | If you edit the buffer manually, diff-mode will try to update the hunk |
| df52e0e7 SM |
1231 | headers for you on-the-fly. |
| 1232 | ||
| 1233 | You can also switch between context diff and unified diff with \\[diff-context->unified], | |
| 72147c53 | 1234 | or vice versa with \\[diff-unified->context] and you can also reverse the direction of |
| e78cf8e5 | 1235 | a diff with \\[diff-reverse-direction]. |
| b64d66b5 | 1236 | |
| b64d66b5 RS |
1237 | \\{diff-mode-map}" |
| 1238 | ||
| 610a6418 SM |
1239 | (set (make-local-variable 'font-lock-defaults) diff-font-lock-defaults) |
| 1240 | (set (make-local-variable 'outline-regexp) diff-outline-regexp) | |
| ccce6558 DL |
1241 | (set (make-local-variable 'imenu-generic-expression) |
| 1242 | diff-imenu-generic-expression) | |
| 19e713d8 DL |
1243 | ;; These are not perfect. They would be better done separately for |
| 1244 | ;; context diffs and unidiffs. | |
| 1245 | ;; (set (make-local-variable 'paragraph-start) | |
| 1246 | ;; (concat "@@ " ; unidiff hunk | |
| 1247 | ;; "\\|\\*\\*\\* " ; context diff hunk or file start | |
| 1248 | ;; "\\|--- [^\t]+\t")) ; context or unidiff file | |
| 1249 | ;; ; start (first or second line) | |
| 1250 | ;; (set (make-local-variable 'paragraph-separate) paragraph-start) | |
| 1251 | ;; (set (make-local-variable 'page-delimiter) "--- [^\t]+\t") | |
| 1252 | ;; compile support | |
| 6fc049f6 | 1253 | (set (make-local-variable 'next-error-function) 'diff-next-error) |
| cdbb79c1 | 1254 | |
| 19446c41 DN |
1255 | (set (make-local-variable 'beginning-of-defun-function) |
| 1256 | 'diff-beginning-of-file-and-junk) | |
| 1257 | (set (make-local-variable 'end-of-defun-function) | |
| 1258 | 'diff-end-of-file) | |
| 1259 | ||
| 53dd481c | 1260 | (setq buffer-read-only diff-default-read-only) |
| 769dd0f1 | 1261 | ;; setup change hooks |
| e8a1ed31 | 1262 | (if (not diff-update-on-the-fly) |
| 3ccdb14e | 1263 | (add-hook 'write-contents-functions 'diff-write-contents-hooks nil t) |
| 610a6418 | 1264 | (make-local-variable 'diff-unhandled-changes) |
| 3cec9c57 SM |
1265 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 1266 | (add-hook 'post-command-hook 'diff-post-command-hook nil t)) | |
| 610a6418 | 1267 | ;; Neat trick from Dave Love to add more bindings in read-only mode: |
| e78cf8e5 | 1268 | (lexical-let ((ro-bind (cons 'buffer-read-only diff-mode-shared-map))) |
| 22cd1973 SM |
1269 | (add-to-list 'minor-mode-overriding-map-alist ro-bind) |
| 1270 | ;; Turn off this little trick in case the buffer is put in view-mode. | |
| 1271 | (add-hook 'view-mode-hook | |
| e78cf8e5 SM |
1272 | (lambda () |
| 1273 | (setq minor-mode-overriding-map-alist | |
| 1274 | (delq ro-bind minor-mode-overriding-map-alist))) | |
| 22cd1973 | 1275 | nil t)) |
| 281096ed SM |
1276 | ;; add-log support |
| 1277 | (set (make-local-variable 'add-log-current-defun-function) | |
| 1278 | 'diff-current-defun) | |
| 1b1b5dae SM |
1279 | (set (make-local-variable 'add-log-buffer-file-name-function) |
| 1280 | 'diff-find-file-name)) | |
| 610a6418 SM |
1281 | |
| 1282 | ;;;###autoload | |
| 0b82e382 SM |
1283 | (define-minor-mode diff-minor-mode |
| 1284 | "Minor mode for viewing/editing context diffs. | |
| 1285 | \\{diff-minor-mode-map}" | |
| cfc80227 | 1286 | :group 'diff-mode :lighter " Diff" |
| 0b82e382 | 1287 | ;; FIXME: setup font-lock |
| fef8c55b | 1288 | ;; setup change hooks |
| e8a1ed31 | 1289 | (if (not diff-update-on-the-fly) |
| 3ccdb14e | 1290 | (add-hook 'write-contents-functions 'diff-write-contents-hooks nil t) |
| fef8c55b | 1291 | (make-local-variable 'diff-unhandled-changes) |
| 3cec9c57 SM |
1292 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 1293 | (add-hook 'post-command-hook 'diff-post-command-hook nil t))) | |
| 0b82e382 | 1294 | |
| e78cf8e5 | 1295 | ;;; Handy hook functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 22cd1973 SM |
1296 | |
| 1297 | (defun diff-delete-if-empty () | |
| 1298 | ;; An empty diff file means there's no more diffs to integrate, so we | |
| 1299 | ;; can just remove the file altogether. Very handy for .rej files if we | |
| 1300 | ;; remove hunks as we apply them. | |
| 1301 | (when (and buffer-file-name | |
| 1302 | (eq 0 (nth 7 (file-attributes buffer-file-name)))) | |
| 1303 | (delete-file buffer-file-name))) | |
| 1304 | ||
| 1305 | (defun diff-delete-empty-files () | |
| 1306 | "Arrange for empty diff files to be removed." | |
| 1307 | (add-hook 'after-save-hook 'diff-delete-if-empty nil t)) | |
| 1308 | ||
| 1309 | (defun diff-make-unified () | |
| 1310 | "Turn context diffs into unified diffs if applicable." | |
| 1311 | (if (save-excursion | |
| 1312 | (goto-char (point-min)) | |
| 4c174fb4 | 1313 | (and (looking-at diff-hunk-header-re) (eq (char-after) ?*))) |
| 22cd1973 SM |
1314 | (let ((mod (buffer-modified-p))) |
| 1315 | (unwind-protect | |
| 1316 | (diff-context->unified (point-min) (point-max)) | |
| 1317 | (restore-buffer-modified-p mod))))) | |
| 610a6418 | 1318 | |
| 027ac3f8 SM |
1319 | ;;; |
| 1320 | ;;; Misc operations that have proved useful at some point. | |
| 1321 | ;;; | |
| 1322 | ||
| 1323 | (defun diff-next-complex-hunk () | |
| 1324 | "Jump to the next \"complex\" hunk. | |
| 1325 | \"Complex\" is approximated by \"the hunk changes the number of lines\". | |
| 1326 | Only works for unified diffs." | |
| 1327 | (interactive) | |
| 1328 | (while | |
| f52d2f9c SM |
1329 | (and (re-search-forward diff-hunk-header-re-unified nil t) |
| 1330 | (equal (match-string 2) (match-string 4))))) | |
| 027ac3f8 | 1331 | |
| 3a349573 SM |
1332 | (defun diff-sanity-check-context-hunk-half (lines) |
| 1333 | (let ((count lines)) | |
| 1334 | (while | |
| 1335 | (cond | |
| 1336 | ((and (memq (char-after) '(?\s ?! ?+ ?-)) | |
| 1337 | (memq (char-after (1+ (point))) '(?\s ?\t))) | |
| 1338 | (decf count) t) | |
| 1339 | ((or (zerop count) (= count lines)) nil) | |
| 1340 | ((memq (char-after) '(?! ?+ ?-)) | |
| 1341 | (if (not (and (eq (char-after (1+ (point))) ?\n) | |
| 1342 | (y-or-n-p "Try to auto-fix whitespace loss damage? "))) | |
| 1343 | (error "End of hunk ambiguously marked") | |
| 1344 | (forward-char 1) (insert " ") (forward-line -1) t)) | |
| 1345 | ((< lines 0) | |
| 1346 | (error "End of hunk ambiguously marked")) | |
| 1347 | ((not (y-or-n-p "Try to auto-fix whitespace loss and word-wrap damage? ")) | |
| 1348 | (error "Abort!")) | |
| 1349 | ((eolp) (insert " ") (forward-line -1) t) | |
| 1350 | (t (insert " ") (delete-region (- (point) 2) (- (point) 1)) t)) | |
| 1351 | (forward-line)))) | |
| 1352 | ||
| 1353 | (defun diff-sanity-check-hunk () | |
| 1354 | (let (;; Every modification is protected by a y-or-n-p, so it's probably | |
| 1355 | ;; OK to override a read-only setting. | |
| 1356 | (inhibit-read-only t)) | |
| 1357 | (save-excursion | |
| 1358 | (cond | |
| 1359 | ((not (looking-at diff-hunk-header-re)) | |
| 1360 | (error "Not recognizable hunk header")) | |
| 1361 | ||
| 1362 | ;; A context diff. | |
| 1363 | ((eq (char-after) ?*) | |
| 7fb6ce6e | 1364 | (if (not (looking-at "\\*\\{15\\}\\(?: .*\\)?\n\\*\\*\\* \\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)? \\*\\*\\*\\*")) |
| 3a349573 SM |
1365 | (error "Unrecognized context diff first hunk header format") |
| 1366 | (forward-line 2) | |
| 1367 | (diff-sanity-check-context-hunk-half | |
| f52d2f9c | 1368 | (if (match-end 2) |
| 7fb6ce6e TTN |
1369 | (1+ (- (string-to-number (match-string 2)) |
| 1370 | (string-to-number (match-string 1)))) | |
| 1371 | 1)) | |
| 1372 | (if (not (looking-at "--- \\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)? ----$")) | |
| 3a349573 SM |
1373 | (error "Unrecognized context diff second hunk header format") |
| 1374 | (forward-line) | |
| 1375 | (diff-sanity-check-context-hunk-half | |
| f52d2f9c | 1376 | (if (match-end 2) |
| 7fb6ce6e TTN |
1377 | (1+ (- (string-to-number (match-string 2)) |
| 1378 | (string-to-number (match-string 1)))) | |
| 1379 | 1))))) | |
| 3a349573 SM |
1380 | |
| 1381 | ;; A unified diff. | |
| 1382 | ((eq (char-after) ?@) | |
| f52d2f9c | 1383 | (if (not (looking-at diff-hunk-header-re-unified)) |
| 3a349573 | 1384 | (error "Unrecognized unified diff hunk header format") |
| 43392d12 SM |
1385 | (let ((before (string-to-number (or (match-string 2) "1"))) |
| 1386 | (after (string-to-number (or (match-string 4) "1")))) | |
| 3a349573 SM |
1387 | (forward-line) |
| 1388 | (while | |
| 1389 | (case (char-after) | |
| 1390 | (?\s (decf before) (decf after) t) | |
| 80a01d97 SM |
1391 | (?- |
| 1392 | (if (and (looking-at diff-file-header-re) | |
| 1393 | (zerop before) (zerop after)) | |
| 1394 | ;; No need to query: this is a case where two patches | |
| 1395 | ;; are concatenated and only counting the lines will | |
| 1396 | ;; give the right result. Let's just add an empty | |
| 1397 | ;; line so that our code which doesn't count lines | |
| 1398 | ;; will not get confused. | |
| 1399 | (progn (save-excursion (insert "\n")) nil) | |
| 1400 | (decf before) t)) | |
| 3a349573 SM |
1401 | (?+ (decf after) t) |
| 1402 | (t | |
| 1403 | (cond | |
| f52d2f9c SM |
1404 | ((and diff-valid-unified-empty-line |
| 1405 | ;; Not just (eolp) so we don't infloop at eob. | |
| 79fd6168 SM |
1406 | (eq (char-after) ?\n) |
| 1407 | (> before 0) (> after 0)) | |
| f52d2f9c | 1408 | (decf before) (decf after) t) |
| 3a349573 SM |
1409 | ((and (zerop before) (zerop after)) nil) |
| 1410 | ((or (< before 0) (< after 0)) | |
| 1411 | (error (if (or (zerop before) (zerop after)) | |
| 1412 | "End of hunk ambiguously marked" | |
| 1413 | "Hunk seriously messed up"))) | |
| f52d2f9c | 1414 | ((not (y-or-n-p (concat "Try to auto-fix " (if (eolp) "whitespace loss" "word-wrap damage") "? "))) |
| 3a349573 SM |
1415 | (error "Abort!")) |
| 1416 | ((eolp) (insert " ") (forward-line -1) t) | |
| 1417 | (t (insert " ") | |
| 1418 | (delete-region (- (point) 2) (- (point) 1)) t)))) | |
| 1419 | (forward-line))))) | |
| 1420 | ||
| 1421 | ;; A plain diff. | |
| 1422 | (t | |
| 1423 | ;; TODO. | |
| 1424 | ))))) | |
| 1425 | ||
| 1eabc5e6 SM |
1426 | (defun diff-hunk-text (hunk destp char-offset) |
| 1427 | "Return the literal source text from HUNK as (TEXT . OFFSET). | |
| a70b0ff8 | 1428 | If DESTP is nil, TEXT is the source, otherwise the destination text. |
| 1eabc5e6 SM |
1429 | CHAR-OFFSET is a char-offset in HUNK, and OFFSET is the corresponding |
| 1430 | char-offset in TEXT." | |
| 3017133f | 1431 | (with-temp-buffer |
| 6e4e8a3b SM |
1432 | (insert hunk) |
| 1433 | (goto-char (point-min)) | |
| 1434 | (let ((src-pos nil) | |
| 1435 | (dst-pos nil) | |
| 1436 | (divider-pos nil) | |
| 1437 | (num-pfx-chars 2)) | |
| 1438 | ;; Set the following variables: | |
| 1439 | ;; SRC-POS buffer pos of the source part of the hunk or nil if none | |
| 1440 | ;; DST-POS buffer pos of the destination part of the hunk or nil | |
| 1441 | ;; DIVIDER-POS buffer pos of any divider line separating the src & dst | |
| 1442 | ;; NUM-PFX-CHARS number of line-prefix characters used by this format" | |
| 1443 | (cond ((looking-at "^@@") | |
| 1444 | ;; unified diff | |
| 1445 | (setq num-pfx-chars 1) | |
| 1446 | (forward-line 1) | |
| 1447 | (setq src-pos (point) dst-pos (point))) | |
| 1448 | ((looking-at "^\\*\\*") | |
| 1449 | ;; context diff | |
| 1450 | (forward-line 2) | |
| 1451 | (setq src-pos (point)) | |
| 1452 | (re-search-forward "^--- " nil t) | |
| 1453 | (forward-line 0) | |
| 1454 | (setq divider-pos (point)) | |
| 1455 | (forward-line 1) | |
| 1456 | (setq dst-pos (point))) | |
| 1457 | ((looking-at "^[0-9]+a[0-9,]+$") | |
| 1458 | ;; normal diff, insert | |
| 1459 | (forward-line 1) | |
| 1460 | (setq dst-pos (point))) | |
| 1461 | ((looking-at "^[0-9,]+d[0-9]+$") | |
| 1462 | ;; normal diff, delete | |
| 1463 | (forward-line 1) | |
| 1464 | (setq src-pos (point))) | |
| 1465 | ((looking-at "^[0-9,]+c[0-9,]+$") | |
| 1466 | ;; normal diff, change | |
| 1467 | (forward-line 1) | |
| 1468 | (setq src-pos (point)) | |
| 1469 | (re-search-forward "^---$" nil t) | |
| 1470 | (forward-line 0) | |
| 1471 | (setq divider-pos (point)) | |
| 1472 | (forward-line 1) | |
| 1473 | (setq dst-pos (point))) | |
| 1474 | (t | |
| 1475 | (error "Unknown diff hunk type"))) | |
| 1476 | ||
| 1477 | (if (if destp (null dst-pos) (null src-pos)) | |
| 1478 | ;; Implied empty text | |
| 1479 | (if char-offset '("" . 0) "") | |
| 1480 | ||
| 1481 | ;; For context diffs, either side can be empty, (if there's only | |
| 1482 | ;; added or only removed text). We should then use the other side. | |
| 1483 | (cond ((equal src-pos divider-pos) (setq src-pos dst-pos)) | |
| 1484 | ((equal dst-pos (point-max)) (setq dst-pos src-pos))) | |
| 1485 | ||
| 1486 | (when char-offset (goto-char (+ (point-min) char-offset))) | |
| 1487 | ||
| 1488 | ;; Get rid of anything except the desired text. | |
| 1489 | (save-excursion | |
| 1490 | ;; Delete unused text region | |
| 1491 | (let ((keep (if destp dst-pos src-pos))) | |
| 1492 | (when (and divider-pos (> divider-pos keep)) | |
| 1493 | (delete-region divider-pos (point-max))) | |
| 1494 | (delete-region (point-min) keep)) | |
| 1495 | ;; Remove line-prefix characters, and unneeded lines (unified diffs). | |
| 1496 | (let ((kill-char (if destp ?- ?+))) | |
| 1497 | (goto-char (point-min)) | |
| 1498 | (while (not (eobp)) | |
| 1499 | (if (eq (char-after) kill-char) | |
| 1500 | (delete-region (point) (progn (forward-line 1) (point))) | |
| 1501 | (delete-char num-pfx-chars) | |
| 1502 | (forward-line 1))))) | |
| 1503 | ||
| 1504 | (let ((text (buffer-substring-no-properties (point-min) (point-max)))) | |
| 1505 | (if char-offset (cons text (- (point) (point-min))) text)))))) | |
| 370d860c | 1506 | |
| 7530b6da | 1507 | |
| c0aa75f7 | 1508 | (defun diff-find-text (text) |
| 1eabc5e6 | 1509 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. |
| 7530b6da | 1510 | If TEXT isn't found, nil is returned." |
| 7530b6da MB |
1511 | (let* ((orig (point)) |
| 1512 | (forw (and (search-forward text nil t) | |
| 1eabc5e6 | 1513 | (cons (match-beginning 0) (match-end 0)))) |
| 7530b6da MB |
1514 | (back (and (goto-char (+ orig (length text))) |
| 1515 | (search-backward text nil t) | |
| 1eabc5e6 SM |
1516 | (cons (match-beginning 0) (match-end 0))))) |
| 1517 | ;; Choose the closest match. | |
| 1518 | (if (and forw back) | |
| 1519 | (if (> (- (car forw) orig) (- orig (car back))) back forw) | |
| 1520 | (or back forw)))) | |
| 1521 | ||
| 1522 | (defun diff-find-approx-text (text) | |
| 1523 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. | |
| 1524 | Whitespace differences are ignored." | |
| 1525 | (let* ((orig (point)) | |
| 1526 | (re (concat "^[ \t\n\f]*" | |
| 1527 | (mapconcat 'regexp-quote (split-string text) "[ \t\n\f]+") | |
| 1528 | "[ \t\n\f]*\n")) | |
| 1529 | (forw (and (re-search-forward re nil t) | |
| 1530 | (cons (match-beginning 0) (match-end 0)))) | |
| 1531 | (back (and (goto-char (+ orig (length text))) | |
| 1532 | (re-search-backward re nil t) | |
| 1533 | (cons (match-beginning 0) (match-end 0))))) | |
| 1534 | ;; Choose the closest match. | |
| 7530b6da | 1535 | (if (and forw back) |
| 1eabc5e6 | 1536 | (if (> (- (car forw) orig) (- orig (car back))) back forw) |
| 7530b6da MB |
1537 | (or back forw)))) |
| 1538 | ||
| 44a07c5a | 1539 | (defsubst diff-xor (a b) (if a (if (not b) a) b)) |
| 370d860c | 1540 | |
| d868b3bd | 1541 | (defun diff-find-source-location (&optional other-file reverse) |
| 1eabc5e6 SM |
1542 | "Find out (BUF LINE-OFFSET POS SRC DST SWITCHED). |
| 1543 | BUF is the buffer corresponding to the source file. | |
| 1544 | LINE-OFFSET is the offset between the expected and actual positions | |
| 1545 | of the text of the hunk or nil if the text was not found. | |
| 1546 | POS is a pair (BEG . END) indicating the position of the text in the buffer. | |
| 1547 | SRC and DST are the two variants of text as returned by `diff-hunk-text'. | |
| 1548 | SRC is the variant that was found in the buffer. | |
| 1549 | SWITCHED is non-nil if the patch is already applied." | |
| 7b91e0f2 | 1550 | (save-excursion |
| e8a1ed31 | 1551 | (let* ((other (diff-xor other-file diff-jump-to-old-file)) |
| fd691799 SM |
1552 | (char-offset (- (point) (progn (diff-beginning-of-hunk 'try-harder) |
| 1553 | (point)))) | |
| 3a349573 SM |
1554 | ;; Check that the hunk is well-formed. Otherwise diff-mode and |
| 1555 | ;; the user may disagree on what constitutes the hunk | |
| 1556 | ;; (e.g. because an empty line truncates the hunk mid-course), | |
| 1557 | ;; leading to potentially nasty surprises for the user. | |
| 1558 | (_ (diff-sanity-check-hunk)) | |
| 370d860c SM |
1559 | (hunk (buffer-substring (point) |
| 1560 | (save-excursion (diff-end-of-hunk) (point)))) | |
| 1561 | (old (diff-hunk-text hunk reverse char-offset)) | |
| 1562 | (new (diff-hunk-text hunk (not reverse) char-offset)) | |
| 7b91e0f2 | 1563 | ;; Find the location specification. |
| d868b3bd | 1564 | (line (if (not (looking-at "\\(?:\\*\\{15\\}.*\n\\)?[-@* ]*\\([0-9,]+\\)\\([ acd+]+\\([0-9,]+\\)\\)?")) |
| 370d860c SM |
1565 | (error "Can't find the hunk header") |
| 1566 | (if other (match-string 1) | |
| 1567 | (if (match-end 3) (match-string 3) | |
| 1568 | (unless (re-search-forward "^--- \\([0-9,]+\\)" nil t) | |
| 1569 | (error "Can't find the hunk separator")) | |
| 1570 | (match-string 1))))) | |
| 1571 | (file (or (diff-find-file-name other) (error "Can't find the file"))) | |
| 1572 | (buf (find-file-noselect file))) | |
| 7b91e0f2 SM |
1573 | ;; Update the user preference if he so wished. |
| 1574 | (when (> (prefix-numeric-value other-file) 8) | |
| e8a1ed31 | 1575 | (setq diff-jump-to-old-file other)) |
| d868b3bd SM |
1576 | (with-current-buffer buf |
| 1577 | (goto-line (string-to-number line)) | |
| 1578 | (let* ((orig-pos (point)) | |
| 1eabc5e6 | 1579 | (switched nil) |
| 22cd1973 | 1580 | ;; FIXME: Check for case where both OLD and NEW are found. |
| 1eabc5e6 SM |
1581 | (pos (or (diff-find-text (car old)) |
| 1582 | (progn (setq switched t) (diff-find-text (car new))) | |
| 1583 | (progn (setq switched nil) | |
| 22cd1973 SM |
1584 | (condition-case nil |
| 1585 | (diff-find-approx-text (car old)) | |
| 1586 | (invalid-regexp nil))) ;Regex too big. | |
| 1eabc5e6 | 1587 | (progn (setq switched t) |
| 22cd1973 SM |
1588 | (condition-case nil |
| 1589 | (diff-find-approx-text (car new)) | |
| 1590 | (invalid-regexp nil))) ;Regex too big. | |
| 1eabc5e6 | 1591 | (progn (setq switched nil) nil)))) |
| 370d860c SM |
1592 | (nconc |
| 1593 | (list buf) | |
| 1eabc5e6 SM |
1594 | (if pos |
| 1595 | (list (count-lines orig-pos (car pos)) pos) | |
| 1596 | (list nil (cons orig-pos (+ orig-pos (length (car old)))))) | |
| 370d860c SM |
1597 | (if switched (list new old t) (list old new)))))))) |
| 1598 | ||
| 7b91e0f2 | 1599 | |
| 370d860c SM |
1600 | (defun diff-hunk-status-msg (line-offset reversed dry-run) |
| 1601 | (let ((msg (if dry-run | |
| 1602 | (if reversed "already applied" "not yet applied") | |
| 1603 | (if reversed "undone" "applied")))) | |
| 1604 | (message (cond ((null line-offset) "Hunk text not found") | |
| 1605 | ((= line-offset 0) "Hunk %s") | |
| 1606 | ((= line-offset 1) "Hunk %s at offset %d line") | |
| 1607 | (t "Hunk %s at offset %d lines")) | |
| 1608 | msg line-offset))) | |
| 1609 | ||
| cb9a30c8 | 1610 | (defvar diff-apply-hunk-to-backup-file nil) |
| 370d860c SM |
1611 | |
| 1612 | (defun diff-apply-hunk (&optional reverse) | |
| 6e4e8a3b | 1613 | "Apply the current hunk to the source file and go to the next. |
| 7530b6da | 1614 | By default, the new source file is patched, but if the variable |
| e8a1ed31 | 1615 | `diff-jump-to-old-file' is non-nil, then the old source file is |
| 7530b6da MB |
1616 | patched instead (some commands, such as `diff-goto-source' can change |
| 1617 | the value of this variable when given an appropriate prefix argument). | |
| 1618 | ||
| 4eaa6852 | 1619 | With a prefix argument, REVERSE the hunk." |
| 370d860c | 1620 | (interactive "P") |
| 281096ed | 1621 | (destructuring-bind (buf line-offset pos old new &optional switched) |
| 44a07c5a SM |
1622 | ;; Sometimes we'd like to have the following behavior: if REVERSE go |
| 1623 | ;; to the new file, otherwise go to the old. But that means that by | |
| 1624 | ;; default we use the old file, which is the opposite of the default | |
| 1625 | ;; for diff-goto-source, and is thus confusing. Also when you don't | |
| 1626 | ;; know about it it's pretty surprising. | |
| 1627 | ;; TODO: make it possible to ask explicitly for this behavior. | |
| 1628 | ;; | |
| 1629 | ;; This is duplicated in diff-test-hunk. | |
| 1630 | (diff-find-source-location nil reverse) | |
| 370d860c | 1631 | (cond |
| 4eaa6852 MB |
1632 | ((null line-offset) |
| 1633 | (error "Can't find the text to patch")) | |
| cb9a30c8 SM |
1634 | ((with-current-buffer buf |
| 1635 | (and buffer-file-name | |
| 1636 | (backup-file-name-p buffer-file-name) | |
| 1637 | (not diff-apply-hunk-to-backup-file) | |
| 1638 | (not (set (make-local-variable 'diff-apply-hunk-to-backup-file) | |
| 1639 | (yes-or-no-p (format "Really apply this hunk to %s? " | |
| 1640 | (file-name-nondirectory | |
| 1641 | buffer-file-name))))))) | |
| 593b4fa8 AS |
1642 | (error "%s" |
| 1643 | (substitute-command-keys | |
| cb9a30c8 SM |
1644 | (format "Use %s\\[diff-apply-hunk] to apply it to the other file" |
| 1645 | (if (not reverse) "\\[universal-argument] "))))) | |
| 370d860c | 1646 | ((and switched |
| cdbb79c1 | 1647 | ;; A reversed patch was detected, perhaps apply it in reverse. |
| 370d860c SM |
1648 | (not (save-window-excursion |
| 1649 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1650 | (goto-char (+ (car pos) (cdr old))) |
| 370d860c SM |
1651 | (y-or-n-p |
| 1652 | (if reverse | |
| 1653 | "Hunk hasn't been applied yet; apply it now? " | |
| 1654 | "Hunk has already been applied; undo it? "))))) | |
| 4eaa6852 | 1655 | (message "(Nothing done)")) |
| 370d860c | 1656 | (t |
| 4eaa6852 MB |
1657 | ;; Apply the hunk |
| 1658 | (with-current-buffer buf | |
| 1eabc5e6 SM |
1659 | (goto-char (car pos)) |
| 1660 | (delete-region (car pos) (cdr pos)) | |
| 4eaa6852 MB |
1661 | (insert (car new))) |
| 1662 | ;; Display BUF in a window | |
| 1eabc5e6 | 1663 | (set-window-point (display-buffer buf) (+ (car pos) (cdr new))) |
| 4eaa6852 MB |
1664 | (diff-hunk-status-msg line-offset (diff-xor switched reverse) nil) |
| 1665 | (when diff-advance-after-apply-hunk | |
| 1666 | (diff-hunk-next)))))) | |
| 370d860c | 1667 | |
| 7530b6da | 1668 | |
| 7530b6da MB |
1669 | (defun diff-test-hunk (&optional reverse) |
| 1670 | "See whether it's possible to apply the current hunk. | |
| 4eaa6852 | 1671 | With a prefix argument, try to REVERSE the hunk." |
| 7530b6da | 1672 | (interactive "P") |
| 370d860c | 1673 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 44a07c5a | 1674 | (diff-find-source-location nil reverse) |
| 1eabc5e6 | 1675 | (set-window-point (display-buffer buf) (+ (car pos) (cdr src))) |
| 4eaa6852 | 1676 | (diff-hunk-status-msg line-offset (diff-xor reverse switched) t))) |
| 370d860c | 1677 | |
| 7530b6da | 1678 | |
| a1e2d7f7 SM |
1679 | (defalias 'diff-mouse-goto-source 'diff-goto-source) |
| 1680 | ||
| 1681 | (defun diff-goto-source (&optional other-file event) | |
| 7530b6da | 1682 | "Jump to the corresponding source line. |
| e8a1ed31 | 1683 | `diff-jump-to-old-file' (or its opposite if the OTHER-FILE prefix arg |
| 281096ed | 1684 | is given) determines whether to jump to the old or the new file. |
| 7530b6da | 1685 | If the prefix arg is bigger than 8 (for example with \\[universal-argument] \\[universal-argument]) |
| a70b0ff8 | 1686 | then `diff-jump-to-old-file' is also set, for the next invocations." |
| a1e2d7f7 | 1687 | (interactive (list current-prefix-arg last-input-event)) |
| a6373340 SM |
1688 | ;; When pointing at a removal line, we probably want to jump to |
| 1689 | ;; the old location, and else to the new (i.e. as if reverting). | |
| 1690 | ;; This is a convenient detail when using smerge-diff. | |
| a1e2d7f7 | 1691 | (if event (posn-set-point (event-end event))) |
| a6373340 SM |
1692 | (let ((rev (not (save-excursion (beginning-of-line) (looking-at "[-<]"))))) |
| 1693 | (destructuring-bind (buf line-offset pos src dst &optional switched) | |
| 1694 | (diff-find-source-location other-file rev) | |
| 1695 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1696 | (goto-char (+ (car pos) (cdr src))) |
| 55d5d717 | 1697 | (diff-hunk-status-msg line-offset (diff-xor rev switched) t)))) |
| 370d860c | 1698 | |
| 7530b6da | 1699 | |
| 281096ed | 1700 | (defun diff-current-defun () |
| 370d860c SM |
1701 | "Find the name of function at point. |
| 1702 | For use in `add-log-current-defun-function'." | |
| ef63ea1c SM |
1703 | ;; Kill change-log-default-name so it gets recomputed each time, since |
| 1704 | ;; each hunk may belong to another file which may belong to another | |
| 1705 | ;; directory and hence have a different ChangeLog file. | |
| 1706 | (kill-local-variable 'change-log-default-name) | |
| 2f9edc8b KG |
1707 | (save-excursion |
| 1708 | (when (looking-at diff-hunk-header-re) | |
| 1709 | (forward-line 1) | |
| 4f815065 | 1710 | (re-search-forward "^[^ ]" nil t)) |
| 2f9edc8b KG |
1711 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 1712 | (diff-find-source-location) | |
| 281096ed SM |
1713 | (beginning-of-line) |
| 1714 | (or (when (memq (char-after) '(?< ?-)) | |
| 370d860c SM |
1715 | ;; Cursor is pointing at removed text. This could be a removed |
| 1716 | ;; function, in which case, going to the source buffer will | |
| 1717 | ;; not help since the function is now removed. Instead, | |
| 1718 | ;; try to figure out the function name just from the code-fragment. | |
| 281096ed SM |
1719 | (let ((old (if switched dst src))) |
| 1720 | (with-temp-buffer | |
| 1721 | (insert (car old)) | |
| 281096ed | 1722 | (funcall (with-current-buffer buf major-mode)) |
| cb4e8176 | 1723 | (goto-char (+ (point-min) (cdr old))) |
| 281096ed SM |
1724 | (add-log-current-defun)))) |
| 1725 | (with-current-buffer buf | |
| 1eabc5e6 | 1726 | (goto-char (+ (car pos) (cdr src))) |
| 281096ed | 1727 | (add-log-current-defun)))))) |
| 027ac3f8 | 1728 | |
| 2659df68 SM |
1729 | (defun diff-ignore-whitespace-hunk () |
| 1730 | "Re-diff the current hunk, ignoring whitespace differences." | |
| 22cd1973 | 1731 | (interactive) |
| fd691799 SM |
1732 | (let* ((char-offset (- (point) (progn (diff-beginning-of-hunk 'try-harder) |
| 1733 | (point)))) | |
| 22cd1973 SM |
1734 | (opts (case (char-after) (?@ "-bu") (?* "-bc") (t "-b"))) |
| 1735 | (line-nb (and (or (looking-at "[^0-9]+\\([0-9]+\\)") | |
| 1736 | (error "Can't find line number")) | |
| 1737 | (string-to-number (match-string 1)))) | |
| 14cf0430 | 1738 | (inhibit-read-only t) |
| 22cd1973 SM |
1739 | (hunk (delete-and-extract-region |
| 1740 | (point) (save-excursion (diff-end-of-hunk) (point)))) | |
| 1741 | (lead (make-string (1- line-nb) ?\n)) ;Line nums start at 1. | |
| 1742 | (file1 (make-temp-file "diff1")) | |
| 1743 | (file2 (make-temp-file "diff2")) | |
| 1744 | (coding-system-for-read buffer-file-coding-system) | |
| 1745 | old new) | |
| 1746 | (unwind-protect | |
| 1747 | (save-excursion | |
| 1748 | (setq old (diff-hunk-text hunk nil char-offset)) | |
| 1749 | (setq new (diff-hunk-text hunk t char-offset)) | |
| 1750 | (write-region (concat lead (car old)) nil file1 nil 'nomessage) | |
| 1751 | (write-region (concat lead (car new)) nil file2 nil 'nomessage) | |
| 1752 | (with-temp-buffer | |
| 1753 | (let ((status | |
| 1754 | (call-process diff-command nil t nil | |
| 1755 | opts file1 file2))) | |
| 1756 | (case status | |
| 1757 | (0 nil) ;Nothing to reformat. | |
| 1758 | (1 (goto-char (point-min)) | |
| 1759 | ;; Remove the file-header. | |
| 1760 | (when (re-search-forward diff-hunk-header-re nil t) | |
| 1761 | (delete-region (point-min) (match-beginning 0)))) | |
| 1762 | (t (goto-char (point-max)) | |
| 1763 | (unless (bolp) (insert "\n")) | |
| 1764 | (insert hunk))) | |
| 1765 | (setq hunk (buffer-string)) | |
| 1766 | (unless (memq status '(0 1)) | |
| 1767 | (error "Diff returned: %s" status))))) | |
| 1768 | ;; Whatever happens, put back some equivalent text: either the new | |
| 1769 | ;; one or the original one in case some error happened. | |
| 1770 | (insert hunk) | |
| 1771 | (delete-file file1) | |
| 1772 | (delete-file file2)))) | |
| 1773 | ||
| be36f934 SM |
1774 | ;;; Fine change highlighting. |
| 1775 | ||
| 2659df68 SM |
1776 | (defface diff-refine-change |
| 1777 | '((((class color) (min-colors 88) (background light)) | |
| 9f4e4f5b | 1778 | :background "grey85") |
| 2659df68 | 1779 | (((class color) (min-colors 88) (background dark)) |
| 5e15554d | 1780 | :background "grey60") |
| 2659df68 SM |
1781 | (((class color) (background light)) |
| 1782 | :background "yellow") | |
| 1783 | (((class color) (background dark)) | |
| 1784 | :background "green") | |
| 1785 | (t :weight bold)) | |
| 1786 | "Face used for char-based changes shown by `diff-refine-hunk'." | |
| 5eee3c95 | 1787 | :group 'diff-mode) |
| be36f934 | 1788 | |
| 2659df68 | 1789 | (defun diff-refine-preproc () |
| 8872469d SM |
1790 | (while (re-search-forward "^[+>]" nil t) |
| 1791 | ;; Remove spurious changes due to the fact that one side of the hunk is | |
| 1792 | ;; marked with leading + or > and the other with leading - or <. | |
| 1793 | ;; We used to replace all the prefix chars with " " but this only worked | |
| 1794 | ;; when we did char-based refinement (or when using | |
| 1795 | ;; smerge-refine-weight-hack) since otherwise, the `forward' motion done | |
| 1796 | ;; in chopup do not necessarily do the same as the ones in highlight | |
| 1797 | ;; since the "_" is not treated the same as " ". | |
| 1798 | (replace-match (cdr (assq (char-before) '((?+ . "-") (?> . "<")))))) | |
| 1799 | ) | |
| be36f934 | 1800 | |
| 2659df68 | 1801 | (defun diff-refine-hunk () |
| be36f934 SM |
1802 | "Highlight changes of hunk at point at a finer granularity." |
| 1803 | (interactive) | |
| 2f42c75f | 1804 | (eval-and-compile (require 'smerge-mode)) |
| 8872469d SM |
1805 | (save-excursion |
| 1806 | (diff-beginning-of-hunk 'try-harder) | |
| 1807 | (let* ((style (diff-hunk-style)) ;Skips the hunk header as well. | |
| 1808 | (beg (point)) | |
| 2659df68 | 1809 | (props '((diff-mode . fine) (face diff-refine-change))) |
| 8872469d SM |
1810 | (end (progn (diff-end-of-hunk) (point)))) |
| 1811 | ||
| 1812 | (remove-overlays beg end 'diff-mode 'fine) | |
| 1813 | ||
| 1814 | (goto-char beg) | |
| 1815 | (case style | |
| 1816 | (unified | |
| 1817 | (while (re-search-forward "^\\(?:-.*\n\\)+\\(\\)\\(?:\\+.*\n\\)+" | |
| 1818 | end t) | |
| 1819 | (smerge-refine-subst (match-beginning 0) (match-end 1) | |
| 1820 | (match-end 1) (match-end 0) | |
| 2659df68 | 1821 | props 'diff-refine-preproc))) |
| 8872469d SM |
1822 | (context |
| 1823 | (let* ((middle (save-excursion (re-search-forward "^---"))) | |
| 1824 | (other middle)) | |
| 1825 | (while (re-search-forward "^\\(?:!.*\n\\)+" middle t) | |
| 1826 | (smerge-refine-subst (match-beginning 0) (match-end 0) | |
| 1827 | (save-excursion | |
| 1828 | (goto-char other) | |
| 1829 | (re-search-forward "^\\(?:!.*\n\\)+" end) | |
| 1830 | (setq other (match-end 0)) | |
| 1831 | (match-beginning 0)) | |
| 1832 | other | |
| 2659df68 | 1833 | props 'diff-refine-preproc)))) |
| 8872469d SM |
1834 | (t ;; Normal diffs. |
| 1835 | (let ((beg1 (1+ (point)))) | |
| 1836 | (when (re-search-forward "^---.*\n" end t) | |
| 1837 | ;; It's a combined add&remove, so there's something to do. | |
| 1838 | (smerge-refine-subst beg1 (match-beginning 0) | |
| 1839 | (match-end 0) end | |
| 2659df68 | 1840 | props 'diff-refine-preproc)))))))) |
| be36f934 SM |
1841 | |
| 1842 | ||
| 8330c175 SM |
1843 | (defun diff-add-change-log-entries-other-window () |
| 1844 | "Iterate through the current diff and create ChangeLog entries. | |
| 1845 | I.e. like `add-change-log-entry-other-window' but applied to all hunks." | |
| 8a72c7f8 DN |
1846 | (interactive) |
| 1847 | ;; XXX: Currently add-change-log-entry-other-window is only called | |
| 1848 | ;; once per hunk. Some hunks have multiple changes, it would be | |
| 1849 | ;; good to call it for each change. | |
| 1850 | (save-excursion | |
| 1851 | (goto-char (point-min)) | |
| 1852 | (let ((orig-buffer (current-buffer))) | |
| 1853 | (condition-case nil | |
| 1854 | ;; Call add-change-log-entry-other-window for each hunk in | |
| 1855 | ;; the diff buffer. | |
| 8330c175 SM |
1856 | (while (progn |
| 1857 | (diff-hunk-next) | |
| 1858 | ;; Move to where the changes are, | |
| 1859 | ;; `add-change-log-entry-other-window' works better in | |
| 1860 | ;; that case. | |
| 02e3336d SM |
1861 | (re-search-forward |
| 1862 | (concat "\n[!+-<>]" | |
| 1863 | ;; If the hunk is a context hunk with an empty first | |
| 1864 | ;; half, recognize the "--- NNN,MMM ----" line | |
| 1865 | "\\(-- [0-9]+\\(,[0-9]+\\)? ----\n" | |
| 1866 | ;; and skip to the next non-context line. | |
| 1867 | "\\( .*\n\\)*[+]\\)?") | |
| 1868 | nil t)) | |
| 8330c175 | 1869 | (save-excursion |
| 40c02e00 | 1870 | (add-change-log-entry nil nil t t))) |
| 8330c175 | 1871 | ;; When there's no more hunks, diff-hunk-next signals an error. |
| 8a72c7f8 DN |
1872 | (error nil))))) |
| 1873 | ||
| 610a6418 SM |
1874 | ;; provide the package |
| 1875 | (provide 'diff-mode) | |
| 1876 | ||
| 027ac3f8 | 1877 | ;;; Old Change Log from when diff-mode wasn't part of Emacs: |
| 610a6418 SM |
1878 | ;; Revision 1.11 1999/10/09 23:38:29 monnier |
| 1879 | ;; (diff-mode-load-hook): dropped. | |
| 1880 | ;; (auto-mode-alist): also catch *.diffs. | |
| 1881 | ;; (diff-find-file-name, diff-mode): add smarts to find the right file | |
| 1882 | ;; for *.rej files (that lack any file name indication). | |
| 1883 | ;; | |
| 1884 | ;; Revision 1.10 1999/09/30 15:32:11 monnier | |
| 1885 | ;; added support for "\ No newline at end of file". | |
| 1886 | ;; | |
| 1887 | ;; Revision 1.9 1999/09/15 00:01:13 monnier | |
| 1888 | ;; - added basic `compile' support. | |
| 1889 | ;; - have diff-kill-hunk call diff-kill-file if it's the only hunk. | |
| 1890 | ;; - diff-kill-file now tries to kill the leading garbage as well. | |
| 1891 | ;; | |
| 1892 | ;; Revision 1.8 1999/09/13 21:10:09 monnier | |
| 1893 | ;; - don't use CL in the autoloaded code | |
| 1894 | ;; - accept diffs using -T | |
| 1895 | ;; | |
| 1896 | ;; Revision 1.7 1999/09/05 20:53:03 monnier | |
| 1897 | ;; interface to ediff-patch | |
| 1898 | ;; | |
| 1899 | ;; Revision 1.6 1999/09/01 20:55:13 monnier | |
| 1900 | ;; (ediff=patch-file): add bindings to call ediff-patch. | |
| 1901 | ;; (diff-find-file-name): taken out of diff-goto-source. | |
| 1902 | ;; (diff-unified->context, diff-context->unified, diff-reverse-direction, | |
| 1903 | ;; diff-fixup-modifs): only use the region if a prefix arg is given. | |
| 1904 | ;; | |
| 1905 | ;; Revision 1.5 1999/08/31 19:18:52 monnier | |
| 1906 | ;; (diff-beginning-of-file, diff-prev-file): fixed wrong parenthesis. | |
| 1907 | ;; | |
| 1908 | ;; Revision 1.4 1999/08/31 13:01:44 monnier | |
| 1909 | ;; use `combine-after-change-calls' to minimize the slowdown of font-lock. | |
| 1910 | ;; | |
| 1911 | ||
| 4f815065 | 1912 | ;; arch-tag: 2571d7ff-bc28-4cf9-8585-42e21890be66 |
| 610a6418 | 1913 | ;;; diff-mode.el ends here |