├── README.org ├── message-view-patch.el └── LICENSE /README.org: -------------------------------------------------------------------------------- 1 | #+TITLE: README 2 | 3 | [[https://melpa.org/#/message-view-patch][file:https://melpa.org/packages/message-view-patch-badge.svg]] 4 | 5 | * message-view-patch 6 | 7 | =mu4e= and =gnus= extension to colorize patch-like emails. Based on 8 | [[https://github.com/orgcandman/emacs-plugins/blob/master/gnus-article-treat-patch.el][gnus-article-treat-patch.el]] and adapted to work with =mu4e=. It also continues 9 | to work with =gnus=. 10 | 11 | This package was renamed from =mu4e-patch= to =message-view-patch= to reflect 12 | that it works with both =mu4e= and =gnus= (and maybe others?). 13 | 14 | * Installation 15 | 16 | The package =message-view-patch= may be installed directly from [[https://melpa.org/#/org-ql][MELPA]] or with other tools 17 | like [[https://github.com/raxod502/straight.el][straight.el]]. 18 | 19 | After installation, add the hook, 20 | 21 | #+BEGIN_SRC emacs-lisp 22 | ;; colorize patch-based emails 23 | (add-hook 'gnus-part-display-hook 'message-view-patch-highlight) 24 | #+END_SRC 25 | 26 | * Using the old mu4e-view 27 | 28 | For users that set =mu4e-view-use-old= to non-nil, they might also want to get 29 | the =mu4e= faces, too. For that, the following code might be helpful, 30 | 31 | #+begin_src emacs-lisp 32 | (require 'mu4e) 33 | (require 'message-view-patch) 34 | 35 | (add-hook 'mu4e-view-mode-hook #'message-view-patch-highlight) 36 | 37 | (setq mu4e-view-use-old t 38 | message-view-patch-pseudo-headers 39 | '(("^Acked-by: " 'mu4e-header-key-face 'mu4e-header-value-face) 40 | ("^C\\(c\\|C\\): " 'mu4e-header-key-face 'mu4e-header-value-face) 41 | ("^From: " 'mu4e-header-key-face 'mu4e-header-value-face) 42 | ("^Link: " 'mu4e-header-key-face 'mu4e-header-value-face) 43 | ("^Reported-by: " 'mu4e-header-key-face 'mu4e-header-value-face) 44 | ("^Reviewed-by: " 'mu4e-header-key-face 'mu4e-header-value-face) 45 | ("^Signed-off-by: " 'mu4e-header-key-face 'mu4e-header-value-face) 46 | ("^Subject: " 'mu4e-header-key-face 'mu4e-header-value-face) 47 | ("^Tested-by: " 'mu4e-header-key-face 'mu4e-header-value-face))) 48 | 49 | (set-face-attribute 'message-view-patch-cite-1 nil :inherit 'mu4e-cited-1-face) 50 | (set-face-attribute 'message-view-patch-cite-2 nil :inherit 'mu4e-cited-2-face) 51 | (set-face-attribute 'message-view-patch-cite-3 nil :inherit 'mu4e-cited-3-face) 52 | (set-face-attribute 'message-view-patch-cite-4 nil :inherit 'mu4e-cited-4-face) 53 | (set-face-attribute 'message-view-patch-cite-5 nil :inherit 'mu4e-cited-5-face) 54 | (set-face-attribute 'message-view-patch-cite-6 nil :inherit 'mu4e-cited-6-face) 55 | (set-face-attribute 'message-view-patch-cite-7 nil :inherit 'mu4e-cited-7-face) 56 | #+end_src 57 | -------------------------------------------------------------------------------- /message-view-patch.el: -------------------------------------------------------------------------------- 1 | ;;; message-view-patch.el --- Colorize patch-like emails in mu4e -*- lexical-binding: t; -*- 2 | 3 | ;; Copyright (C) 2011 Frank Terbeck. 4 | ;; Copyright (C) 2018-2021 Sean Farley. 5 | 6 | ;; Author: Sean Farley 7 | ;; URL: https://github.com/seanfarley/message-view-patch 8 | ;; Version: 0.2.0 9 | ;; Created: 2018-06-15 10 | ;; Package-Requires: ((emacs "24.4") (magit "3.0.0")) 11 | ;; Keywords: extensions mu4e gnus 12 | 13 | ;;; License 14 | 15 | ;; This program is free software: you can redistribute it and/or modify 16 | ;; it under the terms of the GNU General Public License as published by 17 | ;; the Free Software Foundation, either version 3 of the License, or 18 | ;; (at your option) any later version. 19 | 20 | ;; This program is distributed in the hope that it will be useful, 21 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 22 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 | ;; GNU General Public License for more details. 24 | 25 | ;; You should have received a copy of the GNU General Public License 26 | ;; along with this program. If not, see . 27 | 28 | ;;; Commentary: 29 | 30 | ;; This is adapted from Frank Terbeck's gnus-article-treat-patch.el but has 31 | ;; been adapted to work with mu4e. 32 | 33 | ;;; Code: 34 | 35 | (require 'diff-mode) 36 | (require 'gnus) 37 | (require 'magit) 38 | 39 | ;; Customs 40 | (defgroup message-view-patch nil 41 | "Type faces (fonts) used in message-view-patch." 42 | :group 'mu4e) 43 | 44 | (defcustom message-view-patch-regex 45 | '("^@@ -[0-9]+,[0-9]+ \\+[0-9]+,[0-9]+ @@") 46 | "List of conditions that will enable patch treatment. 47 | 48 | String values will be matched as regular expressions within the 49 | currently processed part. Non-string value are supposed to be 50 | code fragments, which determine whether or not to do treatment: 51 | The code needs to return t if treatment is wanted." 52 | :type '(repeat (string :tag "regex")) 53 | :group 'message-view-patch) 54 | 55 | ;; Faces 56 | (defgroup message-view-patch-faces nil 57 | "Type faces (fonts) used in message-view-patch." 58 | :group 'mu4e 59 | :group 'faces) 60 | 61 | (defface message-view-patch-three-dashes 62 | '((t :inherit diff-header)) 63 | "Face for the three dashes in a diff header." 64 | :group 'message-view-patch-faces) 65 | 66 | (defface message-view-patch-scissors 67 | '((t :inherit diff-header)) 68 | "Face for the scissors 8< lines." 69 | :group 'message-view-patch-faces) 70 | 71 | (defface message-view-patch-diff-index 72 | '((t :inherit diff-header)) 73 | "Face for the diff index." 74 | :group 'message-view-patch-faces) 75 | 76 | (defface message-view-patch-diff-hunk 77 | '((t :inherit magit-diff-hunk-heading)) 78 | "Face for the diff hunk." 79 | :group 'message-view-patch-faces) 80 | 81 | (defface message-view-patch-diff-equals 82 | '((t :inherit diff-header)) 83 | "Face for the line of equal signs that some diffs have." 84 | :group 'message-view-patch-faces) 85 | 86 | (defface message-view-patch-commit-message 87 | '((t :inherit magit-section-highlight)) 88 | "Face for the commit message." 89 | :group 'message-view-patch-faces) 90 | 91 | (defface message-view-patch-diff-stat-file 92 | '((t :inherit magit-filename)) 93 | "Face for the file stats." 94 | :group 'message-view-patch-faces) 95 | 96 | (defface message-view-patch-diff-stat-bar 97 | '((t :inherit magit-section-highlight)) 98 | "Face for the stat bar separator." 99 | :group 'message-view-patch-faces) 100 | 101 | (defface message-view-patch-diff-stat-num 102 | '((t :inherit magit-section-highlight)) 103 | "Face for the stat number column." 104 | :group 'message-view-patch-faces) 105 | 106 | (defface message-view-patch-misc 107 | '((t :inherit magit-diff-file-heading-highlight)) 108 | "Face for the \"misc line\" part of the diff." 109 | :group 'message-view-patch-faces) 110 | 111 | (defface message-view-patch-commit-comment 112 | '((t :inherit magit-section-highlight)) 113 | "Face for the commit part of the diff. 114 | 115 | E.g. between two ---'s after the commit message)." 116 | :group 'message-view-patch-faces) 117 | 118 | (defface message-view-patch-diff-header 119 | '((t :inherit diff-header)) 120 | "Face for the diff hunk headers." 121 | :group 'message-view-patch-faces) 122 | 123 | (defface message-view-patch-diff-added 124 | '((t :inherit diff-added)) 125 | "Face for the diff lines that are added." 126 | :group 'message-view-patch-faces) 127 | 128 | (defface message-view-patch-diff-removed 129 | '((t :inherit magit-diff-removed)) 130 | "Face for the diff lines that are removed." 131 | :group 'message-view-patch-faces) 132 | 133 | (defface message-view-patch-diff-context 134 | '((t :inherit magit-diff-context)) 135 | "Face for the context lines in the diff." 136 | :group 'message-view-patch-faces) 137 | 138 | (defface message-view-patch-cite-1 139 | '((t :inherit gnus-cite-1)) 140 | "Face for cited message parts (level 1)." 141 | :group 'message-view-patch-faces) 142 | 143 | (defface message-view-patch-cite-2 144 | '((t :inherit gnus-cite-2)) 145 | "Face for cited message parts (level 2)." 146 | :group 'message-view-patch-faces) 147 | 148 | (defface message-view-patch-cite-3 149 | '((t :inherit gnus-cite-3)) 150 | "Face for cited message parts (level 3)." 151 | :group 'message-view-patch-faces) 152 | 153 | (defface message-view-patch-cite-4 154 | '((t :inherit gnus-cite-4)) 155 | "Face for cited message parts (level 4)." 156 | :group 'message-view-patch-faces) 157 | 158 | (defface message-view-patch-cite-5 159 | '((t :inherit gnus-cite-5)) 160 | "Face for cited message parts (level 5)." 161 | :group 'message-view-patch-faces) 162 | 163 | (defface message-view-patch-cite-6 164 | '((t :inherit gnus-cite-6)) 165 | "Face for cited message parts (level 6)." 166 | :group 'message-view-patch-faces) 167 | 168 | (defface message-view-patch-cite-7 169 | '((t :inherit gnus-cite-7)) 170 | "Face for cited message parts (level 7)." 171 | :group 'message-view-patch-faces) 172 | 173 | ;; Pseudo-headers 174 | (defcustom message-view-patch-pseudo-headers 175 | '(("^Acked-by: " 'gnus-header-name 'gnus-header-from) 176 | ("^C\\(c\\|C\\): " 'gnus-header-name 'gnus-header-from) 177 | ("^From: " 'gnus-header-name 'gnus-header-from) 178 | ("^Link: " 'gnus-header-name 'gnus-header-from) 179 | ("^Reported-by: " 'gnus-header-name 'gnus-header-from) 180 | ("^Reviewed-by: " 'gnus-header-name 'gnus-header-from) 181 | ("^Signed-off-by: " 'gnus-header-name 'gnus-header-from) 182 | ("^Subject: " 'gnus-header-name 'gnus-header-from) 183 | ("^Suggested-by: " 'gnus-header-name 'gnus-header-from) 184 | ("^Tested-by: " 'gnus-header-name 'gnus-header-from)) 185 | "List of lists of regular expressions (with two face names) 186 | which are used to determine the highlighting of pseudo headers in 187 | the commit message (such as \"Signed-off-by:\"). 188 | 189 | The first face if used to highlight the header's name; the second 190 | highlights the header's value." 191 | :type '(string) 192 | :group 'message-view-patch) 193 | 194 | ;; Color handling of faces 195 | (defun message-view-patch-color-line (use-face) 196 | "Set text overlay to `USE-FACE' for the current line." 197 | (overlay-put (make-overlay (point-at-bol) (point-at-eol)) 'face use-face)) 198 | 199 | (defun message-view-patch-pseduo-header-get (line) 200 | "Check if `LINE' is a pseudo header. 201 | 202 | If so return its entry in `message-view-patch-pseudo-headers'." 203 | (catch 'done 204 | (dolist (entry message-view-patch-pseudo-headers) 205 | (let ((regex (car entry))) 206 | (if (string-match regex line) 207 | (throw 'done entry)))) 208 | (throw 'done '()))) 209 | 210 | (defun message-view-patch-pseudo-header-p (line) 211 | "Return t if `LINE' is a pseudo-header; nil otherwise. 212 | 213 | `message-view-patch-pseudo-headers' is used to determine what a 214 | pseudo-header is." 215 | (if (eq (message-view-patch-pseduo-header-get line) '()) nil t)) 216 | 217 | (defun message-view-patch-pseudo-header-color (line) 218 | "Colorize a pseudo-header `LINE'." 219 | (let ((data (message-view-patch-pseduo-header-get line))) 220 | (if (eq data '()) 221 | nil 222 | (let* ((s (point-at-bol)) 223 | (e (point-at-eol)) 224 | (colon (re-search-forward ":")) 225 | (value (+ colon 1))) 226 | (overlay-put (make-overlay s colon) 'face (nth 1 data)) 227 | (overlay-put (make-overlay value e) 'face (nth 2 data)))))) 228 | 229 | ;; diff-stat 230 | (defun message-view-patch-diff-stat-color () 231 | "Colorize a diff-stat `LINE'." 232 | (let ((s (point-at-bol)) 233 | (e (point-at-eol)) 234 | (bar (- (re-search-forward "|") 1)) 235 | (num (- (re-search-forward "[0-9]") 1)) 236 | (pm (- (re-search-forward "\\([+-]\\|$\\)") 1))) 237 | 238 | (overlay-put (make-overlay s (- bar 1)) 'face 'message-view-patch-diff-stat-file) 239 | (overlay-put (make-overlay bar (+ bar 1)) 'face 'message-view-patch-diff-stat-bar) 240 | (overlay-put (make-overlay num pm) 'face 'message-view-patch-diff-stat-num) 241 | 242 | (goto-char pm) 243 | (let* ((plus (looking-at "\\+")) 244 | (brk (if plus 245 | (re-search-forward "-" e t) 246 | (re-search-forward "\\+" e t))) 247 | (first-face (if plus 'message-view-patch-diff-added 'message-view-patch-diff-removed)) 248 | (second-face (if plus 'message-view-patch-diff-removed 'message-view-patch-diff-added))) 249 | 250 | (if (null brk) 251 | (overlay-put (make-overlay pm e) 'face first-face) 252 | (progn 253 | (setq brk (- brk 1)) 254 | (overlay-put (make-overlay pm brk) 'face first-face) 255 | (overlay-put (make-overlay brk e) 'face second-face)))))) 256 | 257 | (defun message-view-patch-diff-stat-summary-color () 258 | "Colorize a diff-stat summary `LINE'." 259 | (let* ((e (point-at-eol)) 260 | (plus (- (re-search-forward "(\\+)" e t) 2)) 261 | (minus (- (re-search-forward "(-)" e t) 2))) 262 | (overlay-put (make-overlay plus (+ plus 1)) 'face 'message-view-patch-diff-added) 263 | (overlay-put (make-overlay minus (+ minus 1)) 'face 'message-view-patch-diff-removed))) 264 | 265 | (defun message-view-patch-diff-stat-line-p (line) 266 | "Return t if `LINE' is a diff-stat line; nil otherwise." 267 | (string-match "^ *[^ ]+[^|]+| +[0-9]+\\( *\\| +[+-]+\\)$" line)) 268 | 269 | (defun message-view-patch-diff-stat-summary-p (line) 270 | "Return t if `LINE' is a diff-stat summary-line; nil otherwise." 271 | (string-match "^ *[0-9]+ file\\(s\\|\\) changed,.*insertion.*deletion" line)) 272 | 273 | ;; unified-diffs 274 | (defun message-view-patch-diff-header-p (line) 275 | "Return t if `LINE' is a diff-header; nil otherwise." 276 | (cond 277 | ((string-match "^\\(\\+\\+\\+\\|---\\) " line) t) 278 | ((string-match "^diff -" line) t) 279 | (t nil))) 280 | 281 | (defun message-view-patch-index-line-p (line) 282 | "Return t if `LINE' is an index-line; nil otherwise." 283 | (cond 284 | ((string-match "^Index: " line) t) 285 | ((string-match "^index [0-9a-f]+\\.\\.[0-9a-f]+" line) t) 286 | (t nil))) 287 | 288 | (defun message-view-patch-hunk-line-p (line) 289 | "Return t if `LINE' is a hunk-line; nil otherwise." 290 | (string-match "^@@ -[0-9]+,[0-9]+ \\+[0-9]+,[0-9]+ @@" line)) 291 | 292 | (defun message-view-patch-atp-misc-diff-p (line) 293 | "Return t if `LINE' is a \"misc line\"; nil otherwise. 294 | 295 | This is tested with respect to patch treatment." 296 | (let ((patterns '("^new file" 297 | "^RCS file:" 298 | "^retrieving revision "))) 299 | (catch 'done 300 | (dolist (regex patterns) 301 | (if (string-match regex line) 302 | (throw 'done t))) 303 | (throw 'done nil)))) 304 | 305 | (defun message-view-patch-atp-looks-like-diff (line) 306 | "Return t if `LINE' is a unified diff; nil otherwise. 307 | 308 | This will test anything that even looks remotely like a line from 309 | a unified diff" 310 | (or (message-view-patch-index-line-p line) 311 | (message-view-patch-diff-header-p line) 312 | (message-view-patch-hunk-line-p line))) 313 | 314 | ;; miscellaneous line handlers 315 | (defun message-view-patch-scissors-line-p (line) 316 | "Return t if `LINE' is a scissors-line; nil otherwise." 317 | (cond 318 | ((string-match "^\\( *--* *\\(8<\\|>8\\)\\)+ *-* *$" line) t) 319 | (t nil))) 320 | 321 | (defun message-view-patch-reply-line-p (line) 322 | "Return face if `LINE' is a reply to previous message; nil otherwise." 323 | (cond 324 | ((string-match "^> *> *> *> *> *> *>" line) 'message-view-patch-cite-7) 325 | ((string-match "^> *> *> *> *> *> " line) 'message-view-patch-cite-6) 326 | ((string-match "^> *> *> *> *> " line) 'message-view-patch-cite-5) 327 | ((string-match "^> *> *> *> " line) 'message-view-patch-cite-4) 328 | ((string-match "^> *> *> " line) 'message-view-patch-cite-3) 329 | ((string-match "^> *> " line) 'message-view-patch-cite-2) 330 | ((string-match "^> " line) 'message-view-patch-cite-1) 331 | (t nil))) 332 | 333 | ;; Patch mail detection 334 | (defun message-view-patch-want-treatment () 335 | "Return t if patch treatment is wanted. 336 | 337 | Run through `message-view-patch-regex' to determine 338 | whether patch treatment is wanted or not." 339 | (catch 'done 340 | (save-excursion 341 | (goto-char (point-min)) 342 | (dolist (entry message-view-patch-regex) 343 | (cond 344 | ((stringp entry) 345 | (if (re-search-forward entry nil t) 346 | (throw 'done t))) 347 | (t 348 | (if (eval entry) 349 | (throw 'done t))))) 350 | (throw 'done nil)))) 351 | 352 | ;; The actual treatment code 353 | (defun message-view-patch-state-machine () 354 | "Colorize a part of the mu4e-view buffer. 355 | 356 | Implement the state machine which colorizes a part of an article 357 | if it looks patch-like. 358 | 359 | The state machine works like this: 360 | 361 | 0a. The machinery starts at the first line of the article's 362 | body. Not the header lines. We don't care about header 363 | lines at all. 364 | 365 | 0b. The whole thing works line by line. It doesn't do any 366 | forward or backward looks. 367 | 368 | 1. Initially, we assume, that what we'll see first is part of 369 | the patch's commit-message. Hence this first initial state 370 | is \"commit-message\". There are several ways out of this 371 | state: 372 | 373 | a) a scissors line is found (see 2.) 374 | b) a pseudo-header line is found (see 3.) 375 | c) a three-dashes line is found (see 4.) 376 | d) something that looks like the start of a unified diff is 377 | found (see 7.) 378 | 379 | 2. A scissors line is something that looks like a pair of 380 | scissors running through a piece of paper. Like this: 381 | 382 | ------ 8< ----- 8< ------ 383 | 384 | or this: 385 | 386 | ------------>8----------- 387 | 388 | The function `message-view-patch-scissors-line-p' decides whether a 389 | line is a scissors line or not. After a scissors line was 390 | treated, the machine will switch back to the 391 | \"commit-mesage\" state. 392 | 393 | 3. This is very similar to a scissors line. It'll just return 394 | to the old state after its being done. The 395 | `message-view-patch-pseudo-header-p' function decides if a line is a 396 | pseudo header. The line will be appropriately colored. 397 | 398 | 4. A three-dashes line is a line that looks like this: \"---\". 399 | It's the definite end of the \"commit-message\" state. The 400 | three dashes line is coloured and the state switches to 401 | \"commit-comment\". (See 5.) 402 | 403 | 5. Nothing in \"commit-comment\" will appear in the generated 404 | commit (this is git-am specific semantics, but it's useful, 405 | so...). It may contain things like random comments or - 406 | promimently - a diff stat. (See 6.) 407 | 408 | 6. A diff stat provides statistics about how much changed in a 409 | given commit by files and by whole commit (in a summary 410 | line). Two functions `message-view-patch-diff-stat-line-p' and 411 | `message-view-patch-diff-stat-summary-p' decide if a line belongs to 412 | a diff stat. It's coloured appropriately and the state 413 | switches back to \"commit-comment\". 414 | 415 | 7. There is a function `message-view-patch-atp-looks-like-diff' which 416 | will cause the state to switch to \"unified-diff\" state 417 | from either \"commit-message\" or \"commit-comment\". In 418 | this mode there can be a set of lines types: 419 | 420 | a) diff-header lines (`message-view-patch-diff-header-p') 421 | b) index lines (`message-view-patch-index-line-p') 422 | c) hunk lines (`message-view-patch-hunk-line-p') 423 | d) equals line (\"^==*$\") 424 | e) context lines (\"^ \") 425 | f) add lines (\"^\\+\") 426 | g) remove lines (\"^-\") 427 | h) empty lines (\"^$\") 428 | 429 | This state runs until the end of the part." 430 | (catch 'message-view-patch-atp-done 431 | (let ((state 'commit-message) 432 | line do-not-move) 433 | 434 | (while t 435 | ;; Put the current line into an easy-to-handle string variable. 436 | (setq line 437 | (buffer-substring-no-properties (point-at-bol) (point-at-eol))) 438 | (setq do-not-move nil) 439 | 440 | ;; Switched state machine. The "real" states are `commit-message', 441 | ;; `commit-comment' and `unified-diff'. The other "states" are only 442 | ;; single-line colourisations that return to their respective parent- 443 | ;; state. Each state may (throw 'message-view-patch-atp-done) to leave the state- 444 | ;; machine immediately. 445 | (setq state 446 | (cond 447 | 448 | ((eq state 'commit-message) 449 | (cond 450 | ((message-view-patch-scissors-line-p line) 451 | (message-view-patch-color-line 'message-view-patch-scissors) 452 | 'commit-message) 453 | ((message-view-patch-pseudo-header-p line) 454 | (message-view-patch-pseudo-header-color line) 455 | 'commit-message) 456 | ((string= line "---") 457 | (message-view-patch-color-line 'message-view-patch-three-dashes) 458 | 'commit-comment) 459 | ((message-view-patch-atp-looks-like-diff line) 460 | (setq do-not-move t) 461 | 'unified-diff) 462 | ((message-view-patch-reply-line-p line) 463 | (message-view-patch-color-line (message-view-patch-reply-line-p line)) 464 | 'commit-message) 465 | (t 466 | (message-view-patch-color-line 'message-view-patch-commit-message) 467 | 'commit-message))) 468 | 469 | ((eq state 'commit-comment) 470 | (cond 471 | ((message-view-patch-diff-stat-line-p line) 472 | (message-view-patch-diff-stat-color) 473 | 'commit-comment) 474 | ((message-view-patch-diff-stat-summary-p line) 475 | (message-view-patch-diff-stat-summary-color) 476 | 'commit-comment) 477 | ((message-view-patch-atp-looks-like-diff line) 478 | (setq do-not-move t) 479 | 'unified-diff) 480 | ((message-view-patch-reply-line-p line) 481 | (message-view-patch-color-line (message-view-patch-reply-line-p line)) 482 | 'commit-message) 483 | (t 484 | (message-view-patch-color-line 'message-view-patch-commit-comment) 485 | 'commit-comment))) 486 | 487 | ((eq state 'unified-diff) 488 | (cond 489 | ((message-view-patch-diff-header-p line) 490 | (message-view-patch-color-line 'message-view-patch-diff-header) 491 | 'unified-diff) 492 | ((message-view-patch-index-line-p line) 493 | (message-view-patch-color-line 'message-view-patch-diff-index) 494 | 'unified-diff) 495 | ((message-view-patch-hunk-line-p line) 496 | (message-view-patch-color-line 'message-view-patch-diff-hunk) 497 | 'unified-diff) 498 | ((string-match "^==*$" line) 499 | (message-view-patch-color-line 'message-view-patch-diff-equals) 500 | 'unified-diff) 501 | ((string-match "^$" line) 502 | 'unified-diff) 503 | ((string-match "^ " line) 504 | (message-view-patch-color-line 'message-view-patch-diff-context) 505 | 'unified-diff) 506 | ((message-view-patch-atp-misc-diff-p line) 507 | (message-view-patch-color-line 'message-view-patch-misc) 508 | 'unified-diff) 509 | ((string-match "^\\+" line) 510 | (message-view-patch-color-line 'message-view-patch-diff-added) 511 | 'unified-diff) 512 | ((string-match "^-- $" line) ;; rare that the entire line exactly "-- " so just treat 513 | ;; as a git-diff ending marker 514 | (message-view-patch-color-line 'message-view-patch-diff-header) 515 | 'unified-diff) 516 | ((string-match "^-" line) 517 | (message-view-patch-color-line 'message-view-patch-diff-removed) 518 | 'unified-diff) 519 | (t 'unified-diff))))) 520 | 521 | (if (not do-not-move) 522 | (if (> (forward-line) 0) 523 | (throw 'message-view-patch-atp-done t))))))) 524 | 525 | ;;;###autoload 526 | (defun message-view-patch-highlight () 527 | "Highlight mail parts, that look like patches. 528 | 529 | Well, usually they *are* patches - or possibly, when you take 530 | git's format-patch output, entire commit exports - including 531 | comments). This treatment assumes the use of unified diffs. Here 532 | is how it works: 533 | 534 | The most fancy type of patch mails look like this: 535 | 536 | From: ... 537 | Subject: ... 538 | Other-Headers: ... 539 | 540 | Body text, which can be reflecting the commit message but may 541 | optionally be followed by a so called scissors line, which 542 | looks like this (in case of a scissors line, the text above is 543 | not part of the commit message): 544 | 545 | -------8<---------- 546 | 547 | If there really was a scissors line, then it's usually 548 | followed by repeated mail-headers. Which do not *have* to 549 | be the same as the one from the sender. 550 | 551 | From: ... 552 | Subject: ... 553 | 554 | More text. Usually part of the commit message. Likely 555 | multiline. What follows may be an optional diffstat. If 556 | there is one, it's usually preceded by a line that contains 557 | only three dashes and nothing more. Before the diffstat, 558 | however, there may be a set of pseudo headers again, like 559 | these: 560 | 561 | Acked-by: Mike Dev 562 | Signed-off-by: Joe D. User 563 | 564 | --- 565 | ChangeLog | 5 ++++- 566 | 1 file changed, 4 insertions(+), 1 deletions(-) 567 | 568 | Now, there is again room for optional text, which is not 569 | part of the actual commit message. May be multiline. Actually, 570 | anything between the three-dashes line and the diff content 571 | is ignored as far as the commit message goes. 572 | 573 | Now for the actual diff part. I want this to work for as 574 | many unified diff formats as possible. What comes to mind 575 | is the format used by git and the format used by cvs and 576 | quilt. 577 | 578 | CVS style looks like this: 579 | 580 | Index: foo/bar.c 581 | ============================================================ 582 | --- boo.orig/foo/bar.c 2010-02-24 .... 583 | +++ boo/foo/bar.c 2010-02-28 .... 584 | @@ -1823,7 +1823,7 @@ 585 | 586 | 587 | There may be multiple hunks. Each file gets an \"Index:\" and 588 | equals line. Now the git format looks like this: 589 | 590 | diff --git a/ChangeLog b/ChangeLog 591 | index 6ffbc8c..36e5c17 100644 592 | --- a/ChangeLog 593 | +++ b/ChangeLog 594 | @@ -3,6 +3,9 @@ 595 | 596 | 597 | Again, there may be multiple hunks. 598 | 599 | When all hunks and all files are done, there may be additional 600 | text below the actual text. 601 | 602 | And that's it. 603 | 604 | You may define the look of several things: pseudo headers, scissor 605 | lines, three-dashes-line, equals lines, diffstat lines, diffstat 606 | summary. Then there is added lines, removed lines, context lines, 607 | diff-header lines and diff-file-header lines, for which we are 608 | borrowing the highlighting faces for from `diff-mode'." 609 | (if (message-view-patch-want-treatment) 610 | (save-excursion 611 | (progn 612 | (let ((inhibit-read-only t)) 613 | (goto-char (point-min)) 614 | (message-view-patch-state-machine)))))) 615 | 616 | (provide 'message-view-patch) 617 | 618 | ;;; message-view-patch.el ends here 619 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------