HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 610a6418 SM |
1 | ;;; diff-mode.el --- A mode for viewing/editing context diffs |
| 2 | ||
| 2b960ac0 | 3 | ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
| 610a6418 SM |
4 | |
| 5 | ;; Author: Stefan Monnier <monnier@cs.yale.edu> | |
| 6 | ;; Keywords: patch diff | |
| 610a6418 SM |
7 | |
| 8 | ;; This file is part of GNU Emacs. | |
| 9 | ||
| 10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
| 11 | ;; it under the terms of the GNU General Public License as published by | |
| 12 | ;; the Free Software Foundation; either version 2, or (at your option) | |
| 13 | ;; any later version. | |
| 14 | ||
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ;; GNU General Public License for more details. | |
| 19 | ||
| 20 | ;; You should have received a copy of the GNU General Public License | |
| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 23 | ;; Boston, MA 02111-1307, USA. | |
| 24 | ||
| 25 | ;;; Commentary: | |
| 26 | ||
| cdbb79c1 | 27 | ;; Provides support for font-lock, outline, navigation |
| 610a6418 SM |
28 | ;; commands, editing and various conversions as well as jumping |
| 29 | ;; to the corresponding source file. | |
| 30 | ||
| 610a6418 SM |
31 | ;; inspired by Pavel Machek's patch-mode.el (<pavel@atrey.karlin.mff.cuni.cz>) |
| 32 | ;; some efforts were spent to have it somewhat compatible with XEmacs' | |
| 33 | ;; diff-mode as well as with compilation-minor-mode | |
| 34 | ||
| 35 | ;; to use it, simply add to your .emacs the following lines: | |
| 36 | ;; | |
| 37 | ;; (autoload 'diff-mode "diff-mode" "Diff major mode" t) | |
| 38 | ;; (add-to-list 'auto-mode-alist '("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode)) | |
| 39 | ||
| 40 | ;; Bugs: | |
| 41 | ||
| 027ac3f8 | 42 | ;; - Reverse doesn't work with normal diffs. |
| 610a6418 SM |
43 | |
| 44 | ;; Todo: | |
| 45 | ||
| 027ac3f8 | 46 | ;; - Improve narrowed-view support. |
| cdbb79c1 SM |
47 | ;; - re-enable (conditionally) the `compile' support after improving it to use |
| 48 | ;; the same code as diff-goto-source. | |
| 027ac3f8 | 49 | ;; - Support for # comments in context->unified. |
| 027ac3f8 SM |
50 | ;; - Allow diff.el to use diff-mode. |
| 51 | ;; This mostly means ability to jump from half-hunk to half-hunk | |
| 52 | ;; in context (and normal) diffs and to jump to the corresponding | |
| 53 | ;; (i.e. new or old) file. | |
| 027ac3f8 | 54 | ;; - Handle `diff -b' output in context->unified. |
| 610a6418 | 55 | |
| cd632e57 SM |
56 | ;; Low priority: |
| 57 | ;; - Spice up the minor-mode with font-lock support. | |
| 58 | ;; - Recognize pcl-cvs' special string for `cvs-execute-single'. | |
| 59 | ||
| 610a6418 SM |
60 | ;;; Code: |
| 61 | ||
| 62 | (eval-when-compile (require 'cl)) | |
| 63 | ||
| 64 | ||
| 65 | (defgroup diff-mode () | |
| 3cec9c57 | 66 | "Major mode for viewing/editing diffs" |
| ccce6558 | 67 | :version "21.1" |
| 610a6418 SM |
68 | :group 'tools |
| 69 | :group 'diff) | |
| 70 | ||
| 769dd0f1 SM |
71 | (defcustom diff-default-read-only t |
| 72 | "If non-nil, `diff-mode' buffers default to being read-only." | |
| 73 | :type 'boolean | |
| 74 | :group 'diff-mode) | |
| 75 | ||
| e8a1ed31 | 76 | (defcustom diff-jump-to-old-file nil |
| 610a6418 SM |
77 | "*Non-nil means `diff-goto-source' jumps to the old file. |
| 78 | Else, it jumps to the new file." | |
| 610a6418 SM |
79 | :type '(boolean)) |
| 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)." | |
| 610a6418 SM |
88 | :type '(boolean)) |
| 89 | ||
| 00df919e MB |
90 | (defcustom diff-advance-after-apply-hunk t |
| 91 | "*Non-nil means `diff-apply-hunk' will move to the next hunk after applying." | |
| 00df919e MB |
92 | :type 'boolean) |
| 93 | ||
| 94 | ||
| 610a6418 SM |
95 | (defvar diff-mode-hook nil |
| 96 | "Run after setting up the `diff-mode' major mode.") | |
| 97 | ||
| 98 | (defvar diff-outline-regexp | |
| 99 | "\\([*+][*+][*+] [^0-9]\\|@@ ...\\|\\*\\*\\* [0-9].\\|--- [0-9]..\\)") | |
| 100 | ||
| cd632e57 | 101 | ;;;; |
| 610a6418 | 102 | ;;;; keymap, menu, ... |
| cd632e57 | 103 | ;;;; |
| 610a6418 | 104 | |
| d87e5627 | 105 | (easy-mmode-defmap diff-mode-shared-map |
| 027ac3f8 | 106 | '(;; From Pavel Machek's patch-mode. |
| d87e5627 SM |
107 | ("n" . diff-hunk-next) |
| 108 | ("N" . diff-file-next) | |
| 109 | ("p" . diff-hunk-prev) | |
| 110 | ("P" . diff-file-prev) | |
| 111 | ("k" . diff-hunk-kill) | |
| 112 | ("K" . diff-file-kill) | |
| 027ac3f8 | 113 | ;; From compilation-minor-mode. |
| d87e5627 SM |
114 | ("}" . diff-file-next) |
| 115 | ("{" . diff-file-prev) | |
| 610a6418 | 116 | ("\C-m" . diff-goto-source) |
| ccce6558 | 117 | ([mouse-2] . diff-mouse-goto-source) |
| 027ac3f8 | 118 | ;; From XEmacs' diff-mode. |
| 610a6418 SM |
119 | ("W" . widen) |
| 120 | ;;("." . diff-goto-source) ;display-buffer | |
| 121 | ;;("f" . diff-goto-source) ;find-file | |
| 122 | ("o" . diff-goto-source) ;other-window | |
| 123 | ;;("w" . diff-goto-source) ;other-frame | |
| 124 | ;;("N" . diff-narrow) | |
| 125 | ;;("h" . diff-show-header) | |
| 126 | ;;("j" . diff-show-difference) ;jump to Nth diff | |
| 127 | ;;("q" . diff-quit) | |
| 128 | (" " . scroll-up) | |
| 129 | ("\177" . scroll-down) | |
| 027ac3f8 | 130 | ;; Our very own bindings. |
| 610a6418 SM |
131 | ("A" . diff-ediff-patch) |
| 132 | ("r" . diff-restrict-view) | |
| 133 | ("R" . diff-reverse-direction) | |
| 134 | ("U" . diff-context->unified) | |
| 135 | ("C" . diff-unified->context)) | |
| 0b82e382 | 136 | "Basic keymap for `diff-mode', bound to various prefix keys.") |
| 610a6418 | 137 | |
| d87e5627 | 138 | (easy-mmode-defmap diff-mode-map |
| 610a6418 | 139 | `(("\e" . ,diff-mode-shared-map) |
| 027ac3f8 SM |
140 | ;; From compilation-minor-mode. |
| 141 | ("\C-c\C-c" . diff-goto-source) | |
| 142 | ;; Misc operations. | |
| cd632e57 | 143 | ("\C-c\C-s" . diff-split-hunk) |
| 3cec9c57 SM |
144 | ("\C-c\C-a" . diff-apply-hunk) |
| 145 | ("\C-c\C-t" . diff-test-hunk)) | |
| 610a6418 SM |
146 | "Keymap for `diff-mode'. See also `diff-mode-shared-map'.") |
| 147 | ||
| 148 | (easy-menu-define diff-mode-menu diff-mode-map | |
| 149 | "Menu for `diff-mode'." | |
| 150 | '("Diff" | |
| 151 | ["Jump to Source" diff-goto-source t] | |
| cd632e57 SM |
152 | ["Apply hunk" diff-apply-hunk t] |
| 153 | ["Apply diff with Ediff" diff-ediff-patch t] | |
| 610a6418 SM |
154 | ["-----" nil nil] |
| 155 | ["Reverse direction" diff-reverse-direction t] | |
| 156 | ["Context -> Unified" diff-context->unified t] | |
| 157 | ["Unified -> Context" diff-unified->context t] | |
| 158 | ;;["Fixup Headers" diff-fixup-modifs (not buffer-read-only)] | |
| 159 | )) | |
| 160 | ||
| 3cec9c57 | 161 | (defcustom diff-minor-mode-prefix "\C-c=" |
| 0b82e382 | 162 | "Prefix key for `diff-minor-mode' commands." |
| 3cec9c57 | 163 | :type '(choice (string "\e") (string "C-c=") string)) |
| 0b82e382 | 164 | |
| d87e5627 SM |
165 | (easy-mmode-defmap diff-minor-mode-map |
| 166 | `((,diff-minor-mode-prefix . ,diff-mode-shared-map)) | |
| 0b82e382 SM |
167 | "Keymap for `diff-minor-mode'. See also `diff-mode-shared-map'.") |
| 168 | ||
| 610a6418 | 169 | |
| cd632e57 | 170 | ;;;; |
| 610a6418 | 171 | ;;;; font-lock support |
| cd632e57 | 172 | ;;;; |
| 610a6418 | 173 | |
| c0aa75f7 | 174 | (defface diff-header-face |
| 86a27a3a | 175 | '((((type tty pc) (class color) (background light)) |
| 34460354 | 176 | (:foreground "blue1" :bold t)) |
| 86a27a3a | 177 | (((type tty pc) (class color) (background dark)) |
| 34460354 | 178 | (:foreground "green" :bold t)) |
| 86a27a3a | 179 | (((class color) (background light)) |
| 3cec9c57 | 180 | (:background "grey85")) |
| 9244f2c7 SM |
181 | (((class color) (background dark)) |
| 182 | (:background "grey45")) | |
| 3cec9c57 | 183 | (t (:bold t))) |
| 1eabc5e6 | 184 | "`diff-mode' face inherited by hunk and index header faces.") |
| c0aa75f7 SM |
185 | (defvar diff-header-face 'diff-header-face) |
| 186 | ||
| 610a6418 | 187 | (defface diff-file-header-face |
| 86a27a3a | 188 | '((((type tty pc) (class color) (background light)) |
| 34460354 | 189 | (:foreground "yellow" :bold t)) |
| 86a27a3a | 190 | (((type tty pc) (class color) (background dark)) |
| 34460354 | 191 | (:foreground "cyan" :bold t)) |
| 86a27a3a | 192 | (((class color) (background light)) |
| 370d860c | 193 | (:background "grey70" :bold t)) |
| 9244f2c7 SM |
194 | (((class color) (background dark)) |
| 195 | (:background "grey60" :bold t)) | |
| 370d860c | 196 | (t (:bold t))) ; :height 1.3 |
| 1eabc5e6 | 197 | "`diff-mode' face used to highlight file header lines.") |
| 610a6418 SM |
198 | (defvar diff-file-header-face 'diff-file-header-face) |
| 199 | ||
| 200 | (defface diff-index-face | |
| c0aa75f7 | 201 | '((t (:inherit diff-file-header-face))) |
| 1eabc5e6 | 202 | "`diff-mode' face used to highlight index header lines.") |
| 610a6418 SM |
203 | (defvar diff-index-face 'diff-index-face) |
| 204 | ||
| 205 | (defface diff-hunk-header-face | |
| c0aa75f7 | 206 | '((t (:inherit diff-header-face))) |
| 1eabc5e6 | 207 | "`diff-mode' face used to highlight hunk header lines.") |
| 610a6418 SM |
208 | (defvar diff-hunk-header-face 'diff-hunk-header-face) |
| 209 | ||
| 210 | (defface diff-removed-face | |
| c0aa75f7 | 211 | '((t (:inherit diff-changed-face))) |
| 1eabc5e6 | 212 | "`diff-mode' face used to highlight removed lines.") |
| 610a6418 SM |
213 | (defvar diff-removed-face 'diff-removed-face) |
| 214 | ||
| 215 | (defface diff-added-face | |
| c0aa75f7 | 216 | '((t (:inherit diff-changed-face))) |
| 1eabc5e6 | 217 | "`diff-mode' face used to highlight added lines.") |
| 610a6418 SM |
218 | (defvar diff-added-face 'diff-added-face) |
| 219 | ||
| 220 | (defface diff-changed-face | |
| 86a27a3a | 221 | '((((type tty pc) (class color) (background light)) |
| 34460354 | 222 | (:foreground "magenta" :bold t :italic t)) |
| 86a27a3a | 223 | (((type tty pc) (class color) (background dark)) |
| 34460354 | 224 | (:foreground "yellow" :bold t :italic t)) |
| 86a27a3a | 225 | (t ())) |
| 1eabc5e6 | 226 | "`diff-mode' face used to highlight changed lines.") |
| 610a6418 SM |
227 | (defvar diff-changed-face 'diff-changed-face) |
| 228 | ||
| 34460354 EZ |
229 | (defface diff-function-face |
| 230 | '((t (:inherit diff-context-face))) | |
| 1eabc5e6 | 231 | "`diff-mode' face used to highlight function names produced by \"diff -p\".") |
| 34460354 EZ |
232 | (defvar diff-function-face 'diff-function-face) |
| 233 | ||
| 9244f2c7 SM |
234 | (defface diff-context-face |
| 235 | '((((class color) (background light)) | |
| 236 | (:foreground "grey50")) | |
| 237 | (((class color) (background dark)) | |
| 238 | (:foreground "grey70")) | |
| 239 | (t )) | |
| 1eabc5e6 | 240 | "`diff-mode' face used to highlight context and other side-information.") |
| 9244f2c7 | 241 | (defvar diff-context-face 'diff-context-face) |
| c0aa75f7 | 242 | |
| 7dfb000f | 243 | (defface diff-nonexistent-face |
| 469fc0a2 | 244 | '((t (:inherit diff-file-header-face))) |
| 1eabc5e6 | 245 | "`diff-mode' face used to highlight nonexistent files in recursive diffs.") |
| 7dfb000f | 246 | (defvar diff-nonexistent-face 'diff-nonexistent-face) |
| 469fc0a2 | 247 | |
| 610a6418 | 248 | (defvar diff-font-lock-keywords |
| c0aa75f7 | 249 | '(("^\\(@@ -[0-9,]+ \\+[0-9,]+ @@\\)\\(.*\\)$" ;unified |
| 19e713d8 | 250 | (1 diff-hunk-header-face) |
| 34460354 | 251 | (2 diff-function-face)) |
| 469fc0a2 | 252 | ("^--- .+ ----$" . diff-hunk-header-face) ;context |
| a62d56ab | 253 | ("^\\(\\*\\{15\\}\\)\\(.*\\)$" ;context |
| 19e713d8 | 254 | (1 diff-hunk-header-face) |
| 34460354 | 255 | (2 diff-function-face)) |
| 370d860c | 256 | ("^\\*\\*\\* .+ \\*\\*\\*\\*". diff-hunk-header-face) ;context |
| a6373340 | 257 | ("^\\(---\\|\\+\\+\\+\\|\\*\\*\\*\\) \\(\\S-+\\)\\(.*[^*-]\\)?\n" |
| c0aa75f7 | 258 | (0 diff-header-face) (2 diff-file-header-face prepend)) |
| 610a6418 SM |
259 | ("^[0-9,]+[acd][0-9,]+$" . diff-hunk-header-face) |
| 260 | ("^!.*\n" . diff-changed-face) ;context | |
| 261 | ("^[+>].*\n" . diff-added-face) | |
| 262 | ("^[-<].*\n" . diff-removed-face) | |
| c0aa75f7 | 263 | ("^Index: \\(.+\\).*\n" (0 diff-header-face) (1 diff-index-face prepend)) |
| 7dfb000f | 264 | ("^Only in .*\n" . diff-nonexistent-face) |
| 0e104800 | 265 | ("^#.*" . font-lock-string-face) |
| 9244f2c7 | 266 | ("^[^-=+*!<>].*\n" . diff-context-face))) |
| 610a6418 SM |
267 | |
| 268 | (defconst diff-font-lock-defaults | |
| 0e104800 | 269 | '(diff-font-lock-keywords t nil nil nil (font-lock-multiline . nil))) |
| 610a6418 | 270 | |
| ccce6558 DL |
271 | (defvar diff-imenu-generic-expression |
| 272 | ;; Prefer second name as first is most likely to be a backup or | |
| 824693e7 DL |
273 | ;; version-control name. The [\t\n] at the end of the unidiff pattern |
| 274 | ;; catches Debian source diff files (which lack the trailing date). | |
| 275 | '((nil "\\+\\+\\+\\ \\([^\t\n]+\\)[\t\n]" 1) ; unidiffs | |
| ccce6558 DL |
276 | (nil "^--- \\([^\t\n]+\\)\t.*\n\\*" 1))) ; context diffs |
| 277 | ||
| 610a6418 SM |
278 | ;;;; |
| 279 | ;;;; Compile support | |
| 280 | ;;;; | |
| 281 | ||
| 282 | (defvar diff-file-regexp-alist | |
| 283 | '(("Index: \\(.+\\)" 1))) | |
| 284 | ||
| 285 | (defvar diff-error-regexp-alist | |
| 286 | '(("@@ -\\([0-9]+\\),[0-9]+ \\+\\([0-9]+\\),[0-9]+ @@" nil 2) | |
| 287 | ("--- \\([0-9]+\\),[0-9]+ ----" nil 1) | |
| 288 | ("\\([0-9]+\\)\\(,[0-9]+\\)?[adc]\\([0-9]+\\)" nil 3))) | |
| 289 | ||
| cd632e57 | 290 | ;;;; |
| 610a6418 | 291 | ;;;; Movement |
| cd632e57 | 292 | ;;;; |
| 610a6418 | 293 | |
| c0078a04 | 294 | (defconst diff-hunk-header-re "^\\(@@ -[0-9,]+ \\+[0-9,]+ @@.*\\|\\*\\{15\\}.*\n\\*\\*\\* .+ \\*\\*\\*\\*\\|[0-9]+\\(,[0-9]+\\)?[acd][0-9]+\\(,[0-9]+\\)?\\)$") |
| 610a6418 SM |
295 | (defconst diff-file-header-re (concat "^\\(--- .+\n\\+\\+\\+\\|\\*\\*\\* .+\n---\\|[^-+!<>0-9@* ]\\).+\n" (substring diff-hunk-header-re 1))) |
| 296 | (defvar diff-narrowed-to nil) | |
| 297 | ||
| 298 | (defun diff-end-of-hunk (&optional style) | |
| 299 | (if (looking-at diff-hunk-header-re) (goto-char (match-end 0))) | |
| 0e104800 | 300 | (let ((end (and (re-search-forward (case style |
| 1eabc5e6 SM |
301 | ;; A `unified' header is ambiguous. |
| 302 | (unified (concat "^[^-+# \\]\\|" | |
| 303 | diff-file-header-re)) | |
| 0e104800 SM |
304 | (context "^[^-+#! \\]") |
| 305 | (normal "^[^<>#\\]") | |
| 306 | (t "^[^-+#!<> \\]")) | |
| 307 | nil t) | |
| 308 | (match-beginning 0)))) | |
| 309 | ;; The return value is used by easy-mmode-define-navigation. | |
| 310 | (goto-char (or end (point-max))))) | |
| 610a6418 SM |
311 | |
| 312 | (defun diff-beginning-of-hunk () | |
| 313 | (beginning-of-line) | |
| 314 | (unless (looking-at diff-hunk-header-re) | |
| 315 | (forward-line 1) | |
| 316 | (condition-case () | |
| 317 | (re-search-backward diff-hunk-header-re) | |
| 318 | (error (error "Can't find the beginning of the hunk"))))) | |
| 319 | ||
| 320 | (defun diff-beginning-of-file () | |
| 321 | (beginning-of-line) | |
| 322 | (unless (looking-at diff-file-header-re) | |
| 323 | (forward-line 2) | |
| 324 | (condition-case () | |
| 325 | (re-search-backward diff-file-header-re) | |
| 326 | (error (error "Can't find the beginning of the file"))))) | |
| 327 | ||
| 328 | (defun diff-end-of-file () | |
| 0e104800 SM |
329 | (re-search-forward "^[-+#!<>0-9@* \\]" nil t) |
| 330 | (re-search-forward "^[^-+#!<>0-9@* \\]" nil 'move) | |
| 610a6418 SM |
331 | (beginning-of-line)) |
| 332 | ||
| d87e5627 SM |
333 | ;; Define diff-{hunk,file}-{prev,next} |
| 334 | (easy-mmode-define-navigation | |
| 335 | diff-hunk diff-hunk-header-re "hunk" diff-end-of-hunk) | |
| 336 | (easy-mmode-define-navigation | |
| 337 | diff-file diff-file-header-re "file" diff-end-of-hunk) | |
| 610a6418 SM |
338 | |
| 339 | (defun diff-restrict-view (&optional arg) | |
| 340 | "Restrict the view to the current hunk. | |
| 341 | If the prefix ARG is given, restrict the view to the current file instead." | |
| 342 | (interactive "P") | |
| 343 | (save-excursion | |
| 344 | (if arg (diff-beginning-of-file) (diff-beginning-of-hunk)) | |
| 345 | (narrow-to-region (point) | |
| 346 | (progn (if arg (diff-end-of-file) (diff-end-of-hunk)) | |
| 347 | (point))) | |
| 348 | (set (make-local-variable 'diff-narrowed-to) (if arg 'file 'hunk)))) | |
| 349 | ||
| 350 | ||
| d87e5627 | 351 | (defun diff-hunk-kill () |
| 610a6418 SM |
352 | "Kill current hunk." |
| 353 | (interactive) | |
| 354 | (diff-beginning-of-hunk) | |
| 1eabc5e6 SM |
355 | (let* ((start (point)) |
| 356 | (nexthunk (ignore-errors (diff-hunk-next) (point))) | |
| 357 | (firsthunk (ignore-errors | |
| 358 | (goto-char start) | |
| 359 | (diff-beginning-of-file) (diff-hunk-next) (point))) | |
| 360 | (nextfile (ignore-errors (diff-file-next) (point)))) | |
| 361 | (goto-char start) | |
| 610a6418 SM |
362 | (if (and firsthunk (= firsthunk start) |
| 363 | (or (null nexthunk) | |
| 364 | (and nextfile (> nexthunk nextfile)))) | |
| 1eabc5e6 | 365 | ;; It's the only hunk for this file, so kill the file. |
| d87e5627 | 366 | (diff-file-kill) |
| 610a6418 SM |
367 | (diff-end-of-hunk) |
| 368 | (kill-region start (point))))) | |
| 369 | ||
| d87e5627 | 370 | (defun diff-file-kill () |
| 610a6418 SM |
371 | "Kill current file's hunks." |
| 372 | (interactive) | |
| 373 | (diff-beginning-of-file) | |
| 374 | (let* ((start (point)) | |
| 375 | (prevhunk (save-excursion | |
| 376 | (ignore-errors | |
| d87e5627 | 377 | (diff-hunk-prev) (point)))) |
| 610a6418 SM |
378 | (index (save-excursion |
| 379 | (re-search-backward "^Index: " prevhunk t)))) | |
| 380 | (when index (setq start index)) | |
| 381 | (diff-end-of-file) | |
| 382 | (kill-region start (point)))) | |
| 383 | ||
| fef8c55b SM |
384 | (defun diff-kill-junk () |
| 385 | "Kill spurious empty diffs." | |
| 386 | (interactive) | |
| 387 | (save-excursion | |
| 388 | (let ((inhibit-read-only t)) | |
| 389 | (goto-char (point-min)) | |
| 390 | (while (re-search-forward (concat "^\\(Index: .*\n\\)" | |
| 391 | "\\([^-+!* <>].*\n\\)*?" | |
| 392 | "\\(\\(Index:\\) \\|" | |
| 393 | diff-file-header-re "\\)") | |
| 394 | nil t) | |
| 395 | (delete-region (if (match-end 4) (match-beginning 0) (match-end 1)) | |
| 396 | (match-beginning 3)) | |
| 397 | (beginning-of-line))))) | |
| 398 | ||
| cd632e57 SM |
399 | (defun diff-count-matches (re start end) |
| 400 | (save-excursion | |
| 401 | (let ((n 0)) | |
| 402 | (goto-char start) | |
| 403 | (while (re-search-forward re end t) (incf n)) | |
| 404 | n))) | |
| 405 | ||
| 406 | (defun diff-split-hunk () | |
| 407 | "Split the current (unified diff) hunk at point into two hunks." | |
| 408 | (interactive) | |
| 409 | (beginning-of-line) | |
| 410 | (let ((pos (point)) | |
| 411 | (start (progn (diff-beginning-of-hunk) (point)))) | |
| 412 | (unless (looking-at "@@ -\\([0-9]+\\),[0-9]+ \\+\\([0-9]+\\),[0-9]+ @@") | |
| 413 | (error "diff-split-hunk only works on unified context diffs")) | |
| 414 | (forward-line 1) | |
| 415 | (let* ((start1 (string-to-number (match-string 1))) | |
| 416 | (start2 (string-to-number (match-string 2))) | |
| 417 | (newstart1 (+ start1 (diff-count-matches "^[- \t]" (point) pos))) | |
| 418 | (newstart2 (+ start2 (diff-count-matches "^[+ \t]" (point) pos)))) | |
| 419 | (goto-char pos) | |
| 420 | ;; Hopefully the after-change-function will not screw us over. | |
| 421 | (insert "@@ -" (number-to-string newstart1) ",1 +" | |
| 422 | (number-to-string newstart2) ",1 @@\n") | |
| 423 | ;; Fix the original hunk-header. | |
| 424 | (diff-fixup-modifs start pos)))) | |
| 425 | ||
| 426 | ||
| 610a6418 SM |
427 | ;;;; |
| 428 | ;;;; jump to other buffers | |
| 429 | ;;;; | |
| 430 | ||
| 0b82e382 SM |
431 | (defvar diff-remembered-files-alist nil) |
| 432 | ||
| 610a6418 SM |
433 | (defun diff-filename-drop-dir (file) |
| 434 | (when (string-match "/" file) (substring file (match-end 0)))) | |
| 435 | ||
| 0b82e382 SM |
436 | (defun diff-merge-strings (ancestor from to) |
| 437 | "Merge the diff between ANCESTOR and FROM into TO. | |
| 438 | Returns the merged string if successful or nil otherwise. | |
| d87e5627 | 439 | The strings are assumed not to contain any \"\\n\" (i.e. end of line). |
| 0b82e382 SM |
440 | If ANCESTOR = FROM, returns TO. |
| 441 | If ANCESTOR = TO, returns FROM. | |
| 442 | The heuristic is simplistic and only really works for cases | |
| 443 | like \(diff-merge-strings \"b/foo\" \"b/bar\" \"/a/c/foo\")." | |
| 444 | ;; Ideally, we want: | |
| 445 | ;; AMB ANB CMD -> CND | |
| 446 | ;; but that's ambiguous if `foo' or `bar' is empty: | |
| 447 | ;; a/foo a/foo1 b/foo.c -> b/foo1.c but not 1b/foo.c or b/foo.c1 | |
| d87e5627 | 448 | (let ((str (concat ancestor "\n" from "\n" to))) |
| 0b82e382 | 449 | (when (and (string-match (concat |
| d87e5627 SM |
450 | "\\`\\(.*?\\)\\(.*\\)\\(.*\\)\n" |
| 451 | "\\1\\(.*\\)\\3\n" | |
| 0b82e382 SM |
452 | "\\(.*\\(\\2\\).*\\)\\'") str) |
| 453 | (equal to (match-string 5 str))) | |
| 454 | (concat (substring str (match-beginning 5) (match-beginning 6)) | |
| 455 | (match-string 4 str) | |
| 456 | (substring str (match-end 6) (match-end 5)))))) | |
| 457 | ||
| 610a6418 SM |
458 | (defun diff-find-file-name (&optional old) |
| 459 | "Return the file corresponding to the current patch. | |
| 460 | Non-nil OLD means that we want the old file." | |
| 461 | (save-excursion | |
| 462 | (unless (looking-at diff-file-header-re) | |
| 463 | (or (ignore-errors (diff-beginning-of-file)) | |
| 464 | (re-search-forward diff-file-header-re nil t))) | |
| 465 | (let* ((limit (save-excursion | |
| 466 | (condition-case () | |
| d87e5627 | 467 | (progn (diff-hunk-prev) (point)) |
| 610a6418 | 468 | (error (point-min))))) |
| 83b7b03b | 469 | (header-files |
| 30cdf899 | 470 | (if (looking-at "[-*][-*][-*] \\(\\S-+\\)\\(\\s-.*\\)?\n[-+][-+][-+] \\(\\S-+\\)") |
| 9b1ac2f6 SM |
471 | (list (if old (match-string 1) (match-string 3)) |
| 472 | (if old (match-string 3) (match-string 1))) | |
| 83b7b03b | 473 | (forward-line 1) nil)) |
| 610a6418 | 474 | (fs (append |
| 610a6418 SM |
475 | (when (save-excursion |
| 476 | (re-search-backward "^Index: \\(.+\\)" limit t)) | |
| 477 | (list (match-string 1))) | |
| 83b7b03b | 478 | header-files |
| 610a6418 SM |
479 | (when (re-search-backward "^diff \\(-\\S-+ +\\)*\\(\\S-+\\)\\( +\\(\\S-+\\)\\)?" nil t) |
| 480 | (list (if old (match-string 2) (match-string 4)) | |
| 481 | (if old (match-string 4) (match-string 2)))))) | |
| 0b82e382 | 482 | (fs (delq nil fs))) |
| 610a6418 | 483 | (or |
| 0b82e382 SM |
484 | ;; use any previously used preference |
| 485 | (cdr (assoc fs diff-remembered-files-alist)) | |
| 486 | ;; try to be clever and use previous choices as an inspiration | |
| 487 | (dolist (rf diff-remembered-files-alist) | |
| 488 | (let ((newfile (diff-merge-strings (caar rf) (car fs) (cdr rf)))) | |
| 489 | (if (and newfile (file-exists-p newfile)) (return newfile)))) | |
| 490 | ;; look for each file in turn. If none found, try again but | |
| 491 | ;; ignoring the first level of directory, ... | |
| 492 | (do* ((files fs (delq nil (mapcar 'diff-filename-drop-dir files))) | |
| 493 | (file nil nil)) | |
| 494 | ((or (null files) | |
| 495 | (setq file (do* ((files files (cdr files)) | |
| 496 | (file (car files) (car files))) | |
| 497 | ((or (null file) (file-exists-p file)) | |
| 498 | file)))) | |
| 499 | file)) | |
| 500 | ;; <foo>.rej patches implicitly apply to <foo> | |
| 610a6418 SM |
501 | (and (string-match "\\.rej\\'" (or buffer-file-name "")) |
| 502 | (let ((file (substring buffer-file-name 0 (match-beginning 0)))) | |
| 503 | (when (file-exists-p file) file))) | |
| 0b82e382 SM |
504 | ;; if all else fails, ask the user |
| 505 | (let ((file (read-file-name (format "Use file %s: " (or (first fs) "")) | |
| 506 | nil (first fs) t (first fs)))) | |
| 507 | (set (make-local-variable 'diff-remembered-files-alist) | |
| 508 | (cons (cons fs file) diff-remembered-files-alist)) | |
| 610a6418 SM |
509 | file))))) |
| 510 | ||
| 1b1b5dae | 511 | |
| 19e713d8 DL |
512 | (defun diff-mouse-goto-source (event) |
| 513 | "Run `diff-goto-source' for the diff at a mouse click." | |
| 514 | (interactive "e") | |
| 515 | (save-excursion | |
| 516 | (mouse-set-point event) | |
| 517 | (diff-goto-source))) | |
| 610a6418 | 518 | |
| 281096ed | 519 | |
| 610a6418 SM |
520 | (defun diff-ediff-patch () |
| 521 | "Call `ediff-patch-file' on the current buffer." | |
| 522 | (interactive) | |
| 523 | (condition-case err | |
| 0e104800 | 524 | (ediff-patch-file nil (current-buffer)) |
| 610a6418 SM |
525 | (wrong-number-of-arguments (ediff-patch-file)))) |
| 526 | ||
| 527 | ;;;; | |
| 528 | ;;;; Conversion functions | |
| 529 | ;;;; | |
| 530 | ||
| 531 | ;;(defvar diff-inhibit-after-change nil | |
| 532 | ;; "Non-nil means inhibit `diff-mode's after-change functions.") | |
| 533 | ||
| 534 | (defun diff-unified->context (start end) | |
| 535 | "Convert unified diffs to context diffs. | |
| 536 | START and END are either taken from the region (if a prefix arg is given) or | |
| 537 | else cover the whole bufer." | |
| 538 | (interactive (if current-prefix-arg | |
| 539 | (list (mark) (point)) | |
| 540 | (list (point-min) (point-max)))) | |
| 541 | (unless (markerp end) (setq end (copy-marker end))) | |
| 542 | (let (;;(diff-inhibit-after-change t) | |
| 543 | (inhibit-read-only t)) | |
| 544 | (save-excursion | |
| 545 | (goto-char start) | |
| c0078a04 | 546 | (while (and (re-search-forward "^\\(\\(---\\) .+\n\\(\\+\\+\\+\\) .+\\|@@ -\\([0-9]+\\),\\([0-9]+\\) \\+\\([0-9]+\\),\\([0-9]+\\) @@.*\\)$" nil t) |
| 610a6418 SM |
547 | (< (point) end)) |
| 548 | (combine-after-change-calls | |
| 549 | (if (match-beginning 2) | |
| 0e104800 | 550 | ;; we matched a file header |
| 610a6418 SM |
551 | (progn |
| 552 | ;; use reverse order to make sure the indices are kept valid | |
| 553 | (replace-match "---" t t nil 3) | |
| 554 | (replace-match "***" t t nil 2)) | |
| 555 | ;; we matched a hunk header | |
| 556 | (let ((line1 (match-string 4)) | |
| 557 | (lines1 (match-string 5)) | |
| 558 | (line2 (match-string 6)) | |
| 559 | (lines2 (match-string 7))) | |
| 560 | (replace-match | |
| 561 | (concat "***************\n*** " line1 "," | |
| 562 | (number-to-string (+ (string-to-number line1) | |
| 563 | (string-to-number lines1) | |
| 564 | -1)) " ****")) | |
| 565 | (forward-line 1) | |
| 566 | (save-restriction | |
| 567 | (narrow-to-region (point) | |
| 568 | (progn (diff-end-of-hunk 'unified) (point))) | |
| 569 | (let ((hunk (buffer-string))) | |
| 570 | (goto-char (point-min)) | |
| 571 | (if (not (save-excursion (re-search-forward "^-" nil t))) | |
| 572 | (delete-region (point) (point-max)) | |
| 573 | (goto-char (point-max)) | |
| 574 | (let ((modif nil) last-pt) | |
| 575 | (while (progn (setq last-pt (point)) | |
| 576 | (= (forward-line -1) 0)) | |
| 577 | (case (char-after) | |
| 578 | (? (insert " ") (setq modif nil) (backward-char 1)) | |
| 579 | (?+ (delete-region (point) last-pt) (setq modif t)) | |
| 580 | (?- (if (not modif) | |
| 581 | (progn (forward-char 1) | |
| 582 | (insert " ")) | |
| 583 | (delete-char 1) | |
| 584 | (insert "! ")) | |
| 585 | (backward-char 2)) | |
| 586 | (?\\ (when (save-excursion (forward-line -1) | |
| 587 | (= (char-after) ?+)) | |
| 588 | (delete-region (point) last-pt) (setq modif t))) | |
| 589 | (t (setq modif nil)))))) | |
| 590 | (goto-char (point-max)) | |
| 591 | (save-excursion | |
| 592 | (insert "--- " line2 "," | |
| 593 | (number-to-string (+ (string-to-number line2) | |
| 594 | (string-to-number lines2) | |
| 595 | -1)) " ----\n" hunk)) | |
| 596 | ;;(goto-char (point-min)) | |
| 597 | (forward-line 1) | |
| 598 | (if (not (save-excursion (re-search-forward "^+" nil t))) | |
| 599 | (delete-region (point) (point-max)) | |
| 600 | (let ((modif nil) (delete nil)) | |
| 601 | (while (not (eobp)) | |
| 602 | (case (char-after) | |
| 603 | (? (insert " ") (setq modif nil) (backward-char 1)) | |
| 604 | (?- (setq delete t) (setq modif t)) | |
| 605 | (?+ (if (not modif) | |
| 606 | (progn (forward-char 1) | |
| 607 | (insert " ")) | |
| 608 | (delete-char 1) | |
| 609 | (insert "! ")) | |
| 610 | (backward-char 2)) | |
| 611 | (?\\ (when (save-excursion (forward-line 1) | |
| 612 | (not (eobp))) | |
| 613 | (setq delete t) (setq modif t))) | |
| 614 | (t (setq modif nil))) | |
| 615 | (let ((last-pt (point))) | |
| 616 | (forward-line 1) | |
| 617 | (when delete | |
| 618 | (delete-region last-pt (point)) | |
| 619 | (setq delete nil))))))))))))))) | |
| 620 | ||
| 621 | (defun diff-context->unified (start end) | |
| 622 | "Convert context diffs to unified diffs. | |
| 623 | START and END are either taken from the region (if a prefix arg is given) or | |
| 624 | else cover the whole bufer." | |
| 625 | (interactive (if current-prefix-arg | |
| 626 | (list (mark) (point)) | |
| 627 | (list (point-min) (point-max)))) | |
| 628 | (unless (markerp end) (setq end (copy-marker end))) | |
| 629 | (let (;;(diff-inhibit-after-change t) | |
| 630 | (inhibit-read-only t)) | |
| 631 | (save-excursion | |
| 632 | (goto-char start) | |
| c0078a04 | 633 | (while (and (re-search-forward "^\\(\\(\\*\\*\\*\\) .+\n\\(---\\) .+\\|\\*\\{15\\}.*\n\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]+\\) \\*\\*\\*\\*\\)$" nil t) |
| 610a6418 SM |
634 | (< (point) end)) |
| 635 | (combine-after-change-calls | |
| 636 | (if (match-beginning 2) | |
| 637 | ;; we matched a file header | |
| 638 | (progn | |
| 639 | ;; use reverse order to make sure the indices are kept valid | |
| 640 | (replace-match "+++" t t nil 3) | |
| 641 | (replace-match "---" t t nil 2)) | |
| 642 | ;; we matched a hunk header | |
| 643 | (let ((line1s (match-string 4)) | |
| 644 | (line1e (match-string 5)) | |
| 645 | (pt1 (match-beginning 0))) | |
| 646 | (replace-match "") | |
| 647 | (unless (re-search-forward | |
| 648 | "^--- \\([0-9]+\\),\\(-?[0-9]+\\) ----$" nil t) | |
| 649 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 650 | (let ((line2s (match-string 1)) | |
| 651 | (line2e (match-string 2)) | |
| 652 | (pt2 (progn | |
| 653 | (delete-region (progn (beginning-of-line) (point)) | |
| 654 | (progn (forward-line 1) (point))) | |
| 655 | (point-marker)))) | |
| 656 | (goto-char pt1) | |
| 657 | (forward-line 1) | |
| 658 | (while (< (point) pt2) | |
| 659 | (case (char-after) | |
| 660 | ((?! ?-) (delete-char 2) (insert "-") (forward-line 1)) | |
| 661 | (?\ ;merge with the other half of the chunk | |
| 662 | (let* ((endline2 | |
| 663 | (save-excursion | |
| 664 | (goto-char pt2) (forward-line 1) (point))) | |
| 665 | (c (char-after pt2))) | |
| 666 | (case c | |
| 667 | ((?! ?+) | |
| 668 | (insert "+" | |
| 669 | (prog1 (buffer-substring (+ pt2 2) endline2) | |
| 670 | (delete-region pt2 endline2)))) | |
| 671 | (?\ ;FIXME: check consistency | |
| 672 | (delete-region pt2 endline2) | |
| 673 | (delete-char 1) | |
| 674 | (forward-line 1)) | |
| 675 | (?\\ (forward-line 1)) | |
| 676 | (t (delete-char 1) (forward-line 1))))) | |
| 677 | (t (forward-line 1)))) | |
| 678 | (while (looking-at "[+! ] ") | |
| 679 | (if (/= (char-after) ?!) (forward-char 1) | |
| 680 | (delete-char 1) (insert "+")) | |
| 681 | (delete-char 1) (forward-line 1)) | |
| 682 | (save-excursion | |
| 683 | (goto-char pt1) | |
| 684 | (insert "@@ -" line1s "," | |
| 685 | (number-to-string (- (string-to-number line1e) | |
| 686 | (string-to-number line1s) | |
| 687 | -1)) | |
| 688 | " +" line2s "," | |
| 689 | (number-to-string (- (string-to-number line2e) | |
| 690 | (string-to-number line2s) | |
| 691 | -1)) " @@")))))))))) | |
| 692 | ||
| 693 | (defun diff-reverse-direction (start end) | |
| 694 | "Reverse the direction of the diffs. | |
| 695 | START and END are either taken from the region (if a prefix arg is given) or | |
| 696 | else cover the whole bufer." | |
| 697 | (interactive (if current-prefix-arg | |
| 698 | (list (mark) (point)) | |
| 699 | (list (point-min) (point-max)))) | |
| 700 | (unless (markerp end) (setq end (copy-marker end))) | |
| 701 | (let (;;(diff-inhibit-after-change t) | |
| 702 | (inhibit-read-only t)) | |
| 703 | (save-excursion | |
| 704 | (goto-char start) | |
| c0078a04 | 705 | (while (and (re-search-forward "^\\(\\([-*][-*][-*] \\)\\(.+\\)\n\\([-+][-+][-+] \\)\\(.+\\)\\|\\*\\{15\\}.*\n\\*\\*\\* \\(.+\\) \\*\\*\\*\\*\\|@@ -\\([0-9,]+\\) \\+\\([0-9,]+\\) @@.*\\)$" nil t) |
| 610a6418 SM |
706 | (< (point) end)) |
| 707 | (combine-after-change-calls | |
| 708 | (cond | |
| 709 | ;; a file header | |
| 710 | ((match-beginning 2) (replace-match "\\2\\5\n\\4\\3" nil)) | |
| 711 | ;; a context-diff hunk header | |
| 712 | ((match-beginning 6) | |
| 713 | (let ((pt-lines1 (match-beginning 6)) | |
| 714 | (lines1 (match-string 6))) | |
| 715 | (replace-match "" nil nil nil 6) | |
| 716 | (forward-line 1) | |
| 717 | (let ((half1s (point))) | |
| 0e104800 | 718 | (while (looking-at "[-! \\][ \t]\\|#") |
| 610a6418 SM |
719 | (when (= (char-after) ?-) (delete-char 1) (insert "+")) |
| 720 | (forward-line 1)) | |
| fef8c55b | 721 | (let ((half1 (delete-and-extract-region half1s (point)))) |
| 610a6418 SM |
722 | (unless (looking-at "^--- \\([0-9]+,-?[0-9]+\\) ----$") |
| 723 | (insert half1) | |
| 724 | (error "Can't find matching `--- n1,n2 ----' line")) | |
| 725 | (let ((str1 (match-string 1))) | |
| 726 | (replace-match lines1 nil nil nil 1) | |
| 727 | (forward-line 1) | |
| 728 | (let ((half2s (point))) | |
| 0e104800 | 729 | (while (looking-at "[!+ \\][ \t]\\|#") |
| 610a6418 SM |
730 | (when (= (char-after) ?+) (delete-char 1) (insert "-")) |
| 731 | (forward-line 1)) | |
| fef8c55b | 732 | (let ((half2 (delete-and-extract-region half2s (point)))) |
| 0e104800 | 733 | (insert (or half1 "")) |
| 610a6418 | 734 | (goto-char half1s) |
| 0e104800 | 735 | (insert (or half2 "")))) |
| 610a6418 SM |
736 | (goto-char pt-lines1) |
| 737 | (insert str1)))))) | |
| 738 | ;; a unified-diff hunk header | |
| 739 | ((match-beginning 7) | |
| 740 | (replace-match "@@ -\\8 +\\7 @@" nil) | |
| 741 | (forward-line 1) | |
| 742 | (let ((c (char-after)) first last) | |
| 743 | (while (case (setq c (char-after)) | |
| 744 | (?- (setq first (or first (point))) | |
| 745 | (delete-char 1) (insert "+") t) | |
| 746 | (?+ (setq last (or last (point))) | |
| 747 | (delete-char 1) (insert "-") t) | |
| 0e104800 | 748 | ((?\\ ?#) t) |
| 610a6418 | 749 | (t (when (and first last (< first last)) |
| fef8c55b SM |
750 | (let ((str |
| 751 | (save-excursion | |
| 752 | (delete-and-extract-region first last)))) | |
| 610a6418 SM |
753 | (insert str))) |
| 754 | (setq first nil last nil) | |
| 755 | (equal ?\ c))) | |
| 756 | (forward-line 1)))))))))) | |
| 757 | ||
| 758 | (defun diff-fixup-modifs (start end) | |
| 759 | "Fixup the hunk headers (in case the buffer was modified). | |
| 760 | START and END are either taken from the region (if a prefix arg is given) or | |
| 761 | else cover the whole bufer." | |
| 762 | (interactive (if current-prefix-arg | |
| 763 | (list (mark) (point)) | |
| 764 | (list (point-min) (point-max)))) | |
| 765 | (let ((inhibit-read-only t)) | |
| 766 | (save-excursion | |
| 767 | (goto-char end) (diff-end-of-hunk) | |
| 768 | (let ((plus 0) (minus 0) (space 0) (bang 0)) | |
| 769 | (while (and (= (forward-line -1) 0) (<= start (point))) | |
| c0078a04 | 770 | (if (not (looking-at "\\(@@ -[0-9,]+ \\+[0-9,]+ @@.*\\|[-*][-*][-*] .+ [-*][-*][-*][-*]\\)$")) |
| 610a6418 SM |
771 | (case (char-after) |
| 772 | (?\ (incf space)) | |
| 773 | (?+ (incf plus)) | |
| 774 | (?- (incf minus)) | |
| 775 | (?! (incf bang)) | |
| 0e104800 | 776 | ((?\\ ?#) nil) |
| 610a6418 SM |
777 | (t (setq space 0 plus 0 minus 0 bang 0))) |
| 778 | (cond | |
| c0078a04 | 779 | ((looking-at "@@ -[0-9]+,\\([0-9]*\\) \\+[0-9]+,\\([0-9]*\\) @@.*$") |
| 610a6418 SM |
780 | (let* ((old1 (match-string 1)) |
| 781 | (old2 (match-string 2)) | |
| 782 | (new1 (number-to-string (+ space minus))) | |
| 783 | (new2 (number-to-string (+ space plus)))) | |
| 784 | (unless (string= new2 old2) (replace-match new2 t t nil 2)) | |
| 785 | (unless (string= new1 old1) (replace-match new1 t t nil 1)))) | |
| 786 | ((looking-at "--- \\([0-9]+\\),\\([0-9]*\\) ----$") | |
| 787 | (when (> (+ space bang plus) 0) | |
| 788 | (let* ((old1 (match-string 1)) | |
| 789 | (old2 (match-string 2)) | |
| 790 | (new (number-to-string | |
| 791 | (+ space bang plus -1 (string-to-number old1))))) | |
| 792 | (unless (string= new old2) (replace-match new t t nil 2))))) | |
| 793 | ((looking-at "\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]*\\) \\*\\*\\*\\*$") | |
| 794 | (when (> (+ space bang minus) 0) | |
| 795 | (let* ((old (match-string 1)) | |
| 796 | (new (format | |
| 797 | (concat "%0" (number-to-string (length old)) "d") | |
| 798 | (+ space bang minus -1 (string-to-number old))))) | |
| 799 | (unless (string= new old) (replace-match new t t nil 2)))))) | |
| 800 | (setq space 0 plus 0 minus 0 bang 0))))))) | |
| 801 | ||
| 802 | ;;;; | |
| 803 | ;;;; Hooks | |
| 804 | ;;;; | |
| 805 | ||
| 806 | (defun diff-write-contents-hooks () | |
| 807 | "Fixup hunk headers if necessary." | |
| 808 | (if (buffer-modified-p) (diff-fixup-modifs (point-min) (point-max))) | |
| 809 | nil) | |
| 810 | ||
| 610a6418 SM |
811 | ;; It turns out that making changes in the buffer from within an |
| 812 | ;; *-change-function is asking for trouble, whereas making them | |
| 813 | ;; from a post-command-hook doesn't pose much problems | |
| 814 | (defvar diff-unhandled-changes nil) | |
| 815 | (defun diff-after-change-function (beg end len) | |
| 816 | "Remember to fixup the hunk header. | |
| 817 | See `after-change-functions' for the meaning of BEG, END and LEN." | |
| c0078a04 SM |
818 | ;; Ignoring changes when inhibit-read-only is set is strictly speaking |
| 819 | ;; incorrect, but it turns out that inhibit-read-only is normally not set | |
| 820 | ;; inside editing commands, while it tends to be set when the buffer gets | |
| 821 | ;; updated by an async process or by a conversion function, both of which | |
| 822 | ;; would rather not be uselessly slowed down by this hook. | |
| 610a6418 SM |
823 | (when (and (not undo-in-progress) (not inhibit-read-only)) |
| 824 | (if diff-unhandled-changes | |
| 825 | (setq diff-unhandled-changes | |
| 826 | (cons (min beg (car diff-unhandled-changes)) | |
| 827 | (max beg (cdr diff-unhandled-changes)))) | |
| 828 | (setq diff-unhandled-changes (cons beg end))))) | |
| 829 | ||
| 830 | (defun diff-post-command-hook () | |
| 831 | "Fixup hunk headers if necessary." | |
| 832 | (when (consp diff-unhandled-changes) | |
| 833 | (ignore-errors | |
| 834 | (save-excursion | |
| fef8c55b | 835 | (goto-char (car diff-unhandled-changes)) |
| 1eabc5e6 SM |
836 | ;; We used to fixup modifs on all the changes, but it turns out |
| 837 | ;; that it's safer not to do it on big changes, for example | |
| 838 | ;; when yanking a big diff, since we might then screw up perfectly | |
| 839 | ;; correct values. -stef | |
| 840 | ;; (unless (ignore-errors | |
| 841 | ;; (diff-beginning-of-hunk) | |
| 842 | ;; (save-excursion | |
| 843 | ;; (diff-end-of-hunk) | |
| 844 | ;; (> (point) (car diff-unhandled-changes)))) | |
| 845 | ;; (goto-char (car diff-unhandled-changes)) | |
| 846 | ;; (re-search-forward diff-hunk-header-re (cdr diff-unhandled-changes)) | |
| 847 | ;; (diff-beginning-of-hunk)) | |
| 848 | ;; (diff-fixup-modifs (point) (cdr diff-unhandled-changes)) | |
| 849 | (diff-beginning-of-hunk) | |
| 850 | (when (save-excursion | |
| 851 | (diff-end-of-hunk) | |
| 852 | (> (point) (cdr diff-unhandled-changes))) | |
| 853 | (diff-fixup-modifs (point) (cdr diff-unhandled-changes))))) | |
| 610a6418 SM |
854 | (setq diff-unhandled-changes nil))) |
| 855 | ||
| 610a6418 SM |
856 | ;;;; |
| 857 | ;;;; The main function | |
| 858 | ;;;; | |
| 859 | ||
| 610a6418 | 860 | ;;;###autoload |
| d87e5627 | 861 | (define-derived-mode diff-mode fundamental-mode "Diff" |
| 0b82e382 | 862 | "Major mode for viewing/editing context diffs. |
| 769dd0f1 SM |
863 | Supports unified and context diffs as well as (to a lesser extent) |
| 864 | normal diffs. | |
| 865 | When the buffer is read-only, the ESC prefix is not necessary." | |
| 610a6418 SM |
866 | (set (make-local-variable 'font-lock-defaults) diff-font-lock-defaults) |
| 867 | (set (make-local-variable 'outline-regexp) diff-outline-regexp) | |
| ccce6558 DL |
868 | (set (make-local-variable 'imenu-generic-expression) |
| 869 | diff-imenu-generic-expression) | |
| 19e713d8 DL |
870 | ;; These are not perfect. They would be better done separately for |
| 871 | ;; context diffs and unidiffs. | |
| 872 | ;; (set (make-local-variable 'paragraph-start) | |
| 873 | ;; (concat "@@ " ; unidiff hunk | |
| 874 | ;; "\\|\\*\\*\\* " ; context diff hunk or file start | |
| 875 | ;; "\\|--- [^\t]+\t")) ; context or unidiff file | |
| 876 | ;; ; start (first or second line) | |
| 877 | ;; (set (make-local-variable 'paragraph-separate) paragraph-start) | |
| 878 | ;; (set (make-local-variable 'page-delimiter) "--- [^\t]+\t") | |
| 879 | ;; compile support | |
| cdbb79c1 SM |
880 | |
| 881 | ;;;; compile support is not good enough yet. Also it can be annoying | |
| 882 | ;; and should thus only be enabled conditionally. | |
| 883 | ;; (set (make-local-variable 'compilation-file-regexp-alist) | |
| 884 | ;; diff-file-regexp-alist) | |
| 885 | ;; (set (make-local-variable 'compilation-error-regexp-alist) | |
| 886 | ;; diff-error-regexp-alist) | |
| 887 | ;; (when (string-match "\\.rej\\'" (or buffer-file-name "")) | |
| 888 | ;; (set (make-local-variable 'compilation-current-file) | |
| 889 | ;; (substring buffer-file-name 0 (match-beginning 0)))) | |
| 890 | ;; (compilation-shell-minor-mode 1) | |
| 891 | ||
| 769dd0f1 | 892 | (when (and (> (point-max) (point-min)) diff-default-read-only) |
| 2b960ac0 | 893 | (toggle-read-only t)) |
| 769dd0f1 | 894 | ;; setup change hooks |
| e8a1ed31 | 895 | (if (not diff-update-on-the-fly) |
| 610a6418 SM |
896 | (add-hook 'write-contents-hooks 'diff-write-contents-hooks) |
| 897 | (make-local-variable 'diff-unhandled-changes) | |
| 3cec9c57 SM |
898 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 899 | (add-hook 'post-command-hook 'diff-post-command-hook nil t)) | |
| 610a6418 | 900 | ;; Neat trick from Dave Love to add more bindings in read-only mode: |
| fef8c55b | 901 | (add-to-list (make-local-variable 'minor-mode-overriding-map-alist) |
| 281096ed SM |
902 | (cons 'buffer-read-only diff-mode-shared-map)) |
| 903 | ;; add-log support | |
| 904 | (set (make-local-variable 'add-log-current-defun-function) | |
| 905 | 'diff-current-defun) | |
| 1b1b5dae SM |
906 | (set (make-local-variable 'add-log-buffer-file-name-function) |
| 907 | 'diff-find-file-name)) | |
| 610a6418 SM |
908 | |
| 909 | ;;;###autoload | |
| 0b82e382 SM |
910 | (define-minor-mode diff-minor-mode |
| 911 | "Minor mode for viewing/editing context diffs. | |
| 912 | \\{diff-minor-mode-map}" | |
| 913 | nil " Diff" nil | |
| 914 | ;; FIXME: setup font-lock | |
| fef8c55b | 915 | ;; setup change hooks |
| e8a1ed31 | 916 | (if (not diff-update-on-the-fly) |
| fef8c55b SM |
917 | (add-hook 'write-contents-hooks 'diff-write-contents-hooks) |
| 918 | (make-local-variable 'diff-unhandled-changes) | |
| 3cec9c57 SM |
919 | (add-hook 'after-change-functions 'diff-after-change-function nil t) |
| 920 | (add-hook 'post-command-hook 'diff-post-command-hook nil t))) | |
| 0b82e382 | 921 | |
| 610a6418 | 922 | |
| 027ac3f8 SM |
923 | ;;; |
| 924 | ;;; Misc operations that have proved useful at some point. | |
| 925 | ;;; | |
| 926 | ||
| 927 | (defun diff-next-complex-hunk () | |
| 928 | "Jump to the next \"complex\" hunk. | |
| 929 | \"Complex\" is approximated by \"the hunk changes the number of lines\". | |
| 930 | Only works for unified diffs." | |
| 931 | (interactive) | |
| 932 | (while | |
| 933 | (and (re-search-forward "^@@ [-0-9]+,\\([0-9]+\\) [+0-9]+,\\([0-9]+\\) @@" | |
| 934 | nil t) | |
| 935 | (equal (match-string 1) (match-string 2))))) | |
| 936 | ||
| 1eabc5e6 SM |
937 | (defun diff-hunk-text (hunk destp char-offset) |
| 938 | "Return the literal source text from HUNK as (TEXT . OFFSET). | |
| 939 | if DESTP is nil TEXT is the source, otherwise the destination text. | |
| 940 | CHAR-OFFSET is a char-offset in HUNK, and OFFSET is the corresponding | |
| 941 | char-offset in TEXT." | |
| 3017133f | 942 | (with-temp-buffer |
| 6e4e8a3b SM |
943 | (insert hunk) |
| 944 | (goto-char (point-min)) | |
| 945 | (let ((src-pos nil) | |
| 946 | (dst-pos nil) | |
| 947 | (divider-pos nil) | |
| 948 | (num-pfx-chars 2)) | |
| 949 | ;; Set the following variables: | |
| 950 | ;; SRC-POS buffer pos of the source part of the hunk or nil if none | |
| 951 | ;; DST-POS buffer pos of the destination part of the hunk or nil | |
| 952 | ;; DIVIDER-POS buffer pos of any divider line separating the src & dst | |
| 953 | ;; NUM-PFX-CHARS number of line-prefix characters used by this format" | |
| 954 | (cond ((looking-at "^@@") | |
| 955 | ;; unified diff | |
| 956 | (setq num-pfx-chars 1) | |
| 957 | (forward-line 1) | |
| 958 | (setq src-pos (point) dst-pos (point))) | |
| 959 | ((looking-at "^\\*\\*") | |
| 960 | ;; context diff | |
| 961 | (forward-line 2) | |
| 962 | (setq src-pos (point)) | |
| 963 | (re-search-forward "^--- " nil t) | |
| 964 | (forward-line 0) | |
| 965 | (setq divider-pos (point)) | |
| 966 | (forward-line 1) | |
| 967 | (setq dst-pos (point))) | |
| 968 | ((looking-at "^[0-9]+a[0-9,]+$") | |
| 969 | ;; normal diff, insert | |
| 970 | (forward-line 1) | |
| 971 | (setq dst-pos (point))) | |
| 972 | ((looking-at "^[0-9,]+d[0-9]+$") | |
| 973 | ;; normal diff, delete | |
| 974 | (forward-line 1) | |
| 975 | (setq src-pos (point))) | |
| 976 | ((looking-at "^[0-9,]+c[0-9,]+$") | |
| 977 | ;; normal diff, change | |
| 978 | (forward-line 1) | |
| 979 | (setq src-pos (point)) | |
| 980 | (re-search-forward "^---$" nil t) | |
| 981 | (forward-line 0) | |
| 982 | (setq divider-pos (point)) | |
| 983 | (forward-line 1) | |
| 984 | (setq dst-pos (point))) | |
| 985 | (t | |
| 986 | (error "Unknown diff hunk type"))) | |
| 987 | ||
| 988 | (if (if destp (null dst-pos) (null src-pos)) | |
| 989 | ;; Implied empty text | |
| 990 | (if char-offset '("" . 0) "") | |
| 991 | ||
| 992 | ;; For context diffs, either side can be empty, (if there's only | |
| 993 | ;; added or only removed text). We should then use the other side. | |
| 994 | (cond ((equal src-pos divider-pos) (setq src-pos dst-pos)) | |
| 995 | ((equal dst-pos (point-max)) (setq dst-pos src-pos))) | |
| 996 | ||
| 997 | (when char-offset (goto-char (+ (point-min) char-offset))) | |
| 998 | ||
| 999 | ;; Get rid of anything except the desired text. | |
| 1000 | (save-excursion | |
| 1001 | ;; Delete unused text region | |
| 1002 | (let ((keep (if destp dst-pos src-pos))) | |
| 1003 | (when (and divider-pos (> divider-pos keep)) | |
| 1004 | (delete-region divider-pos (point-max))) | |
| 1005 | (delete-region (point-min) keep)) | |
| 1006 | ;; Remove line-prefix characters, and unneeded lines (unified diffs). | |
| 1007 | (let ((kill-char (if destp ?- ?+))) | |
| 1008 | (goto-char (point-min)) | |
| 1009 | (while (not (eobp)) | |
| 1010 | (if (eq (char-after) kill-char) | |
| 1011 | (delete-region (point) (progn (forward-line 1) (point))) | |
| 1012 | (delete-char num-pfx-chars) | |
| 1013 | (forward-line 1))))) | |
| 1014 | ||
| 1015 | (let ((text (buffer-substring-no-properties (point-min) (point-max)))) | |
| 1016 | (if char-offset (cons text (- (point) (point-min))) text)))))) | |
| 370d860c | 1017 | |
| 7530b6da | 1018 | |
| c0aa75f7 | 1019 | (defun diff-find-text (text) |
| 1eabc5e6 | 1020 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. |
| 7530b6da | 1021 | If TEXT isn't found, nil is returned." |
| 7530b6da MB |
1022 | (let* ((orig (point)) |
| 1023 | (forw (and (search-forward text nil t) | |
| 1eabc5e6 | 1024 | (cons (match-beginning 0) (match-end 0)))) |
| 7530b6da MB |
1025 | (back (and (goto-char (+ orig (length text))) |
| 1026 | (search-backward text nil t) | |
| 1eabc5e6 SM |
1027 | (cons (match-beginning 0) (match-end 0))))) |
| 1028 | ;; Choose the closest match. | |
| 1029 | (if (and forw back) | |
| 1030 | (if (> (- (car forw) orig) (- orig (car back))) back forw) | |
| 1031 | (or back forw)))) | |
| 1032 | ||
| 1033 | (defun diff-find-approx-text (text) | |
| 1034 | "Return the buffer position (BEG . END) of the nearest occurrence of TEXT. | |
| 1035 | Whitespace differences are ignored." | |
| 1036 | (let* ((orig (point)) | |
| 1037 | (re (concat "^[ \t\n\f]*" | |
| 1038 | (mapconcat 'regexp-quote (split-string text) "[ \t\n\f]+") | |
| 1039 | "[ \t\n\f]*\n")) | |
| 1040 | (forw (and (re-search-forward re nil t) | |
| 1041 | (cons (match-beginning 0) (match-end 0)))) | |
| 1042 | (back (and (goto-char (+ orig (length text))) | |
| 1043 | (re-search-backward re nil t) | |
| 1044 | (cons (match-beginning 0) (match-end 0))))) | |
| 1045 | ;; Choose the closest match. | |
| 7530b6da | 1046 | (if (and forw back) |
| 1eabc5e6 | 1047 | (if (> (- (car forw) orig) (- orig (car back))) back forw) |
| 7530b6da MB |
1048 | (or back forw)))) |
| 1049 | ||
| 370d860c SM |
1050 | (defsubst diff-xor (a b) (if a (not b) b)) |
| 1051 | ||
| d868b3bd | 1052 | (defun diff-find-source-location (&optional other-file reverse) |
| 1eabc5e6 SM |
1053 | "Find out (BUF LINE-OFFSET POS SRC DST SWITCHED). |
| 1054 | BUF is the buffer corresponding to the source file. | |
| 1055 | LINE-OFFSET is the offset between the expected and actual positions | |
| 1056 | of the text of the hunk or nil if the text was not found. | |
| 1057 | POS is a pair (BEG . END) indicating the position of the text in the buffer. | |
| 1058 | SRC and DST are the two variants of text as returned by `diff-hunk-text'. | |
| 1059 | SRC is the variant that was found in the buffer. | |
| 1060 | SWITCHED is non-nil if the patch is already applied." | |
| 7b91e0f2 | 1061 | (save-excursion |
| e8a1ed31 | 1062 | (let* ((other (diff-xor other-file diff-jump-to-old-file)) |
| 370d860c SM |
1063 | (char-offset (- (point) (progn (diff-beginning-of-hunk) (point)))) |
| 1064 | (hunk (buffer-substring (point) | |
| 1065 | (save-excursion (diff-end-of-hunk) (point)))) | |
| 1066 | (old (diff-hunk-text hunk reverse char-offset)) | |
| 1067 | (new (diff-hunk-text hunk (not reverse) char-offset)) | |
| 7b91e0f2 | 1068 | ;; Find the location specification. |
| d868b3bd | 1069 | (line (if (not (looking-at "\\(?:\\*\\{15\\}.*\n\\)?[-@* ]*\\([0-9,]+\\)\\([ acd+]+\\([0-9,]+\\)\\)?")) |
| 370d860c SM |
1070 | (error "Can't find the hunk header") |
| 1071 | (if other (match-string 1) | |
| 1072 | (if (match-end 3) (match-string 3) | |
| 1073 | (unless (re-search-forward "^--- \\([0-9,]+\\)" nil t) | |
| 1074 | (error "Can't find the hunk separator")) | |
| 1075 | (match-string 1))))) | |
| 1076 | (file (or (diff-find-file-name other) (error "Can't find the file"))) | |
| 1077 | (buf (find-file-noselect file))) | |
| 7b91e0f2 SM |
1078 | ;; Update the user preference if he so wished. |
| 1079 | (when (> (prefix-numeric-value other-file) 8) | |
| e8a1ed31 | 1080 | (setq diff-jump-to-old-file other)) |
| d868b3bd SM |
1081 | (with-current-buffer buf |
| 1082 | (goto-line (string-to-number line)) | |
| 1083 | (let* ((orig-pos (point)) | |
| 1eabc5e6 SM |
1084 | (switched nil) |
| 1085 | (pos (or (diff-find-text (car old)) | |
| 1086 | (progn (setq switched t) (diff-find-text (car new))) | |
| 1087 | (progn (setq switched nil) | |
| 1088 | (diff-find-approx-text (car old))) | |
| 1089 | (progn (setq switched t) | |
| 1090 | (diff-find-approx-text (car new))) | |
| 1091 | (progn (setq switched nil) nil)))) | |
| 370d860c SM |
1092 | (nconc |
| 1093 | (list buf) | |
| 1eabc5e6 SM |
1094 | (if pos |
| 1095 | (list (count-lines orig-pos (car pos)) pos) | |
| 1096 | (list nil (cons orig-pos (+ orig-pos (length (car old)))))) | |
| 370d860c SM |
1097 | (if switched (list new old t) (list old new)))))))) |
| 1098 | ||
| 7b91e0f2 | 1099 | |
| 370d860c SM |
1100 | (defun diff-hunk-status-msg (line-offset reversed dry-run) |
| 1101 | (let ((msg (if dry-run | |
| 1102 | (if reversed "already applied" "not yet applied") | |
| 1103 | (if reversed "undone" "applied")))) | |
| 1104 | (message (cond ((null line-offset) "Hunk text not found") | |
| 1105 | ((= line-offset 0) "Hunk %s") | |
| 1106 | ((= line-offset 1) "Hunk %s at offset %d line") | |
| 1107 | (t "Hunk %s at offset %d lines")) | |
| 1108 | msg line-offset))) | |
| 1109 | ||
| 1110 | ||
| 1111 | (defun diff-apply-hunk (&optional reverse) | |
| 6e4e8a3b | 1112 | "Apply the current hunk to the source file and go to the next. |
| 7530b6da | 1113 | By default, the new source file is patched, but if the variable |
| e8a1ed31 | 1114 | `diff-jump-to-old-file' is non-nil, then the old source file is |
| 7530b6da MB |
1115 | patched instead (some commands, such as `diff-goto-source' can change |
| 1116 | the value of this variable when given an appropriate prefix argument). | |
| 1117 | ||
| 4eaa6852 | 1118 | With a prefix argument, REVERSE the hunk." |
| 370d860c | 1119 | (interactive "P") |
| 281096ed | 1120 | (destructuring-bind (buf line-offset pos old new &optional switched) |
| 370d860c SM |
1121 | (diff-find-source-location nil reverse) |
| 1122 | (cond | |
| 4eaa6852 MB |
1123 | ((null line-offset) |
| 1124 | (error "Can't find the text to patch")) | |
| 370d860c | 1125 | ((and switched |
| cdbb79c1 | 1126 | ;; A reversed patch was detected, perhaps apply it in reverse. |
| 370d860c SM |
1127 | (not (save-window-excursion |
| 1128 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1129 | (goto-char (+ (car pos) (cdr old))) |
| 370d860c SM |
1130 | (y-or-n-p |
| 1131 | (if reverse | |
| 1132 | "Hunk hasn't been applied yet; apply it now? " | |
| 1133 | "Hunk has already been applied; undo it? "))))) | |
| 4eaa6852 | 1134 | (message "(Nothing done)")) |
| 370d860c | 1135 | (t |
| 4eaa6852 MB |
1136 | ;; Apply the hunk |
| 1137 | (with-current-buffer buf | |
| 1eabc5e6 SM |
1138 | (goto-char (car pos)) |
| 1139 | (delete-region (car pos) (cdr pos)) | |
| 4eaa6852 MB |
1140 | (insert (car new))) |
| 1141 | ;; Display BUF in a window | |
| 1eabc5e6 | 1142 | (set-window-point (display-buffer buf) (+ (car pos) (cdr new))) |
| 4eaa6852 MB |
1143 | (diff-hunk-status-msg line-offset (diff-xor switched reverse) nil) |
| 1144 | (when diff-advance-after-apply-hunk | |
| 1145 | (diff-hunk-next)))))) | |
| 370d860c | 1146 | |
| 7530b6da | 1147 | |
| 7530b6da MB |
1148 | (defun diff-test-hunk (&optional reverse) |
| 1149 | "See whether it's possible to apply the current hunk. | |
| 4eaa6852 | 1150 | With a prefix argument, try to REVERSE the hunk." |
| 7530b6da | 1151 | (interactive "P") |
| 370d860c SM |
1152 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 1153 | (diff-find-source-location nil reverse) | |
| 1eabc5e6 | 1154 | (set-window-point (display-buffer buf) (+ (car pos) (cdr src))) |
| 4eaa6852 | 1155 | (diff-hunk-status-msg line-offset (diff-xor reverse switched) t))) |
| 370d860c | 1156 | |
| 7530b6da MB |
1157 | |
| 1158 | (defun diff-goto-source (&optional other-file) | |
| 1159 | "Jump to the corresponding source line. | |
| e8a1ed31 | 1160 | `diff-jump-to-old-file' (or its opposite if the OTHER-FILE prefix arg |
| 281096ed | 1161 | is given) determines whether to jump to the old or the new file. |
| 7530b6da | 1162 | If the prefix arg is bigger than 8 (for example with \\[universal-argument] \\[universal-argument]) |
| e8a1ed31 | 1163 | then `diff-jump-to-old-file' is also set, for the next invocations." |
| 7530b6da | 1164 | (interactive "P") |
| a6373340 SM |
1165 | ;; When pointing at a removal line, we probably want to jump to |
| 1166 | ;; the old location, and else to the new (i.e. as if reverting). | |
| 1167 | ;; This is a convenient detail when using smerge-diff. | |
| 1168 | (let ((rev (not (save-excursion (beginning-of-line) (looking-at "[-<]"))))) | |
| 1169 | (destructuring-bind (buf line-offset pos src dst &optional switched) | |
| 1170 | (diff-find-source-location other-file rev) | |
| 1171 | (pop-to-buffer buf) | |
| 1eabc5e6 | 1172 | (goto-char (+ (car pos) (cdr src))) |
| 55d5d717 | 1173 | (diff-hunk-status-msg line-offset (diff-xor rev switched) t)))) |
| 370d860c | 1174 | |
| 7530b6da | 1175 | |
| 281096ed | 1176 | (defun diff-current-defun () |
| 370d860c SM |
1177 | "Find the name of function at point. |
| 1178 | For use in `add-log-current-defun-function'." | |
| 281096ed SM |
1179 | (destructuring-bind (buf line-offset pos src dst &optional switched) |
| 1180 | (diff-find-source-location) | |
| 1181 | (save-excursion | |
| 1182 | (beginning-of-line) | |
| 1183 | (or (when (memq (char-after) '(?< ?-)) | |
| 370d860c SM |
1184 | ;; Cursor is pointing at removed text. This could be a removed |
| 1185 | ;; function, in which case, going to the source buffer will | |
| 1186 | ;; not help since the function is now removed. Instead, | |
| 1187 | ;; try to figure out the function name just from the code-fragment. | |
| 281096ed SM |
1188 | (let ((old (if switched dst src))) |
| 1189 | (with-temp-buffer | |
| 1190 | (insert (car old)) | |
| 1191 | (goto-char (cdr old)) | |
| 1192 | (funcall (with-current-buffer buf major-mode)) | |
| 1193 | (add-log-current-defun)))) | |
| 1194 | (with-current-buffer buf | |
| 1eabc5e6 | 1195 | (goto-char (+ (car pos) (cdr src))) |
| 281096ed | 1196 | (add-log-current-defun)))))) |
| 027ac3f8 | 1197 | |
| 610a6418 SM |
1198 | ;; provide the package |
| 1199 | (provide 'diff-mode) | |
| 1200 | ||
| 027ac3f8 | 1201 | ;;; Old Change Log from when diff-mode wasn't part of Emacs: |
| 610a6418 SM |
1202 | ;; Revision 1.11 1999/10/09 23:38:29 monnier |
| 1203 | ;; (diff-mode-load-hook): dropped. | |
| 1204 | ;; (auto-mode-alist): also catch *.diffs. | |
| 1205 | ;; (diff-find-file-name, diff-mode): add smarts to find the right file | |
| 1206 | ;; for *.rej files (that lack any file name indication). | |
| 1207 | ;; | |
| 1208 | ;; Revision 1.10 1999/09/30 15:32:11 monnier | |
| 1209 | ;; added support for "\ No newline at end of file". | |
| 1210 | ;; | |
| 1211 | ;; Revision 1.9 1999/09/15 00:01:13 monnier | |
| 1212 | ;; - added basic `compile' support. | |
| 1213 | ;; - have diff-kill-hunk call diff-kill-file if it's the only hunk. | |
| 1214 | ;; - diff-kill-file now tries to kill the leading garbage as well. | |
| 1215 | ;; | |
| 1216 | ;; Revision 1.8 1999/09/13 21:10:09 monnier | |
| 1217 | ;; - don't use CL in the autoloaded code | |
| 1218 | ;; - accept diffs using -T | |
| 1219 | ;; | |
| 1220 | ;; Revision 1.7 1999/09/05 20:53:03 monnier | |
| 1221 | ;; interface to ediff-patch | |
| 1222 | ;; | |
| 1223 | ;; Revision 1.6 1999/09/01 20:55:13 monnier | |
| 1224 | ;; (ediff=patch-file): add bindings to call ediff-patch. | |
| 1225 | ;; (diff-find-file-name): taken out of diff-goto-source. | |
| 1226 | ;; (diff-unified->context, diff-context->unified, diff-reverse-direction, | |
| 1227 | ;; diff-fixup-modifs): only use the region if a prefix arg is given. | |
| 1228 | ;; | |
| 1229 | ;; Revision 1.5 1999/08/31 19:18:52 monnier | |
| 1230 | ;; (diff-beginning-of-file, diff-prev-file): fixed wrong parenthesis. | |
| 1231 | ;; | |
| 1232 | ;; Revision 1.4 1999/08/31 13:01:44 monnier | |
| 1233 | ;; use `combine-after-change-calls' to minimize the slowdown of font-lock. | |
| 1234 | ;; | |
| 1235 | ||
| 1236 | ;;; diff-mode.el ends here |