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843 lines
29 KiB
EmacsLisp
843 lines
29 KiB
EmacsLisp
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;;; diff-mode.el --- A mode for viewing/editing context diffs
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;; Copyright (C) 1998-1999 Free Software Foundation, Inc.
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;; Author: Stefan Monnier <monnier@cs.yale.edu>
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;; Keywords: patch diff
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;; Version: v1_8
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;; Revision: diff-mode.el,v 1.11 1999/10/09 23:38:29 monnier Exp
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Provides support for font-lock patterns, outline-regexps, navigation
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;; commands, editing and various conversions as well as jumping
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;; to the corresponding source file.
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;; History:
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;; inspired by Pavel Machek's patch-mode.el (<pavel@atrey.karlin.mff.cuni.cz>)
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;; some efforts were spent to have it somewhat compatible with XEmacs'
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;; diff-mode as well as with compilation-minor-mode
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;; to use it, simply add to your .emacs the following lines:
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;;
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;; (autoload 'diff-mode "diff-mode" "Diff major mode" t)
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;; (add-to-list 'auto-mode-alist '("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode))
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;; Bugs:
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;; - reverse doesn't work with normal diffs.
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;; - (nitpick) the mark is not always quite right in diff-goto-source.
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;; Todo:
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;; - improve narrowed-view support.
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;; - improve diff-find-file-name.
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;; - improve the `compile' support.
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;;; Code:
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(eval-when-compile (require 'cl))
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(defgroup diff-mode ()
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"Major-mode for viewing/editing diffs"
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:group 'tools
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:group 'diff)
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(defcustom diff-jump-to-old-file-flag nil
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"*Non-nil means `diff-goto-source' jumps to the old file.
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Else, it jumps to the new file."
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:group 'diff-mode
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:type '(boolean))
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(defcustom diff-update-on-the-fly-flag t
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"*Non-nil means hunk headers are kept up-to-date on-the-fly.
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When editing a diff file, the line numbers in the hunk headers
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need to be kept consistent with the actual diff. This can
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either be done on the fly (but this sometimes interacts poorly with the
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undo mechanism) or whenever the file is written (can be slow
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when editing big diffs)."
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:group 'diff-mode
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:type '(boolean))
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(defvar diff-mode-hook nil
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"Run after setting up the `diff-mode' major mode.")
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(defvar diff-outline-regexp
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"\\([*+][*+][*+] [^0-9]\\|@@ ...\\|\\*\\*\\* [0-9].\\|--- [0-9]..\\)")
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;;;;
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;;;; keymap, menu, ...
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;;;;
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(defmacro diff-defmap (var bindings doc)
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`(defvar ,var
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(let ((m (make-keymap)))
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(dolist (b ,bindings)
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(define-key m (car b) (cdr b)))
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m)
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,doc))
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(diff-defmap diff-mode-shared-map
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'(;; from Pavel Machek's patch-mode
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("n" . diff-next-hunk)
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("N" . diff-next-file)
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("p" . diff-prev-hunk)
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("P" . diff-prev-file)
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("k" . diff-kill-hunk)
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("K" . diff-kill-file)
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;; from compilation-minor-mode
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("}" . diff-next-file)
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("{" . diff-prev-file)
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("\C-m" . diff-goto-source)
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;; from XEmacs' diff-mode
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("W" . widen)
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;;("." . diff-goto-source) ;display-buffer
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;;("f" . diff-goto-source) ;find-file
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("o" . diff-goto-source) ;other-window
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;;("w" . diff-goto-source) ;other-frame
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;;("N" . diff-narrow)
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;;("h" . diff-show-header)
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;;("j" . diff-show-difference) ;jump to Nth diff
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;;("q" . diff-quit)
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(" " . scroll-up)
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("\177" . scroll-down)
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;; our very own bindings
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("A" . diff-ediff-patch)
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("r" . diff-restrict-view)
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("R" . diff-reverse-direction)
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("U" . diff-context->unified)
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("C" . diff-unified->context))
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"Keymap for read-only `diff-mode'. Only active in read-only mode.")
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(diff-defmap diff-mode-map
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`(("\e" . ,diff-mode-shared-map)
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;; from compilation-minor-mode
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("\C-c\C-c" . diff-goto-source))
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"Keymap for `diff-mode'. See also `diff-mode-shared-map'.")
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(easy-menu-define diff-mode-menu diff-mode-map
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"Menu for `diff-mode'."
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'("Diff"
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["Jump to Source" diff-goto-source t]
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["Apply with Ediff" diff-ediff-patch t]
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["-----" nil nil]
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["Reverse direction" diff-reverse-direction t]
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["Context -> Unified" diff-context->unified t]
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["Unified -> Context" diff-unified->context t]
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;;["Fixup Headers" diff-fixup-modifs (not buffer-read-only)]
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))
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;;;;
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;;;; font-lock support
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;;;;
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(defface diff-file-header-face
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'((((class color) (background light))
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(:background "grey70" :bold t))
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(t (:bold t)))
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"diff-mode face used to highlight file header lines."
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:group 'diff-mode)
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(defvar diff-file-header-face 'diff-file-header-face)
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(defface diff-index-face
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'((((class color) (background light))
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(:background "grey70" :bold t))
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(t (:bold t)))
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"diff-mode face used to highlight index header lines."
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:group 'diff-mode)
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(defvar diff-index-face 'diff-index-face)
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(defface diff-hunk-header-face
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'((((class color) (background light))
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(:background "grey85"))
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(t (:bold t)))
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"diff-mode face used to highlight hunk header lines."
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:group 'diff-mode)
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(defvar diff-hunk-header-face 'diff-hunk-header-face)
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(defface diff-removed-face
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'((t ()))
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"diff-mode face used to highlight removed lines."
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:group 'diff-mode)
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(defvar diff-removed-face 'diff-removed-face)
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(defface diff-added-face
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'((t ()))
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"diff-mode face used to highlight added lines."
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:group 'diff-mode)
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(defvar diff-added-face 'diff-added-face)
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(defface diff-changed-face
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'((t ()))
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"diff-mode face used to highlight changed lines."
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:group 'diff-mode)
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(defvar diff-changed-face 'diff-changed-face)
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(defvar diff-font-lock-keywords
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'(("^@@ .+ @@$" . diff-hunk-header-face) ;unified
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("^--- .+ ----$" . diff-hunk-header-face) ;context
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("^\\*\\*\\*.+\\*\\*\\*\n" . diff-hunk-header-face) ;context
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("^\\(---\\|\\+\\+\\+\\|\\*\\*\\*\\) .*\n" . diff-file-header-face)
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("^[0-9,]+[acd][0-9,]+$" . diff-hunk-header-face)
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("^!.*\n" . diff-changed-face) ;context
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("^[+>].*\n" . diff-added-face)
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("^[-<].*\n" . diff-removed-face)
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("^Index: .*\n" . diff-index-face)
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("^[^-=+*!<>].*\n" . font-lock-comment-face)))
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(defconst diff-font-lock-defaults
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'(diff-font-lock-keywords t nil nil nil))
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;;;;
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;;;; Compile support
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;;;;
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(defvar diff-file-regexp-alist
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'(("Index: \\(.+\\)" 1)))
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(defvar diff-error-regexp-alist
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'(("@@ -\\([0-9]+\\),[0-9]+ \\+\\([0-9]+\\),[0-9]+ @@" nil 2)
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("--- \\([0-9]+\\),[0-9]+ ----" nil 1)
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("\\([0-9]+\\)\\(,[0-9]+\\)?[adc]\\([0-9]+\\)" nil 3)))
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;;;;
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;;;; Movement
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;;;;
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(defconst diff-hunk-header-re "^\\(@@ .+ @@\\|\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\n\\*\\*\\* .+ \\*\\*\\*\\*\\|[0-9]+\\(,[0-9]+\\)?[acd][0-9]+\\(,[0-9]+\\)?\\)$")
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(defconst diff-file-header-re (concat "^\\(--- .+\n\\+\\+\\+\\|\\*\\*\\* .+\n---\\|[^-+!<>0-9@* ]\\).+\n" (substring diff-hunk-header-re 1)))
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(defvar diff-narrowed-to nil)
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(defun diff-end-of-hunk (&optional style)
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(if (looking-at diff-hunk-header-re) (goto-char (match-end 0)))
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(re-search-forward (case style
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(unified "^[^-+ \\]")
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(context "^\\([^-+! \\][ \t]\\|--- .+ ----\\)")
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(normal "^\\([<>\\][ \t]\\|---\\)")
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(t "^[^-+!<> \\]"))
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nil 'move)
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(beginning-of-line))
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(defun diff-beginning-of-hunk ()
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(beginning-of-line)
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(unless (looking-at diff-hunk-header-re)
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(forward-line 1)
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(condition-case ()
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(re-search-backward diff-hunk-header-re)
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(error (error "Can't find the beginning of the hunk")))))
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(defun diff-beginning-of-file ()
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(beginning-of-line)
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(unless (looking-at diff-file-header-re)
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(forward-line 2)
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(condition-case ()
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(re-search-backward diff-file-header-re)
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(error (error "Can't find the beginning of the file")))))
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(defun diff-end-of-file ()
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(re-search-forward "^[-+!<>0-9@* \\]" nil t)
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(re-search-forward "^[^-+!<>0-9@* \\]" nil 'move)
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(beginning-of-line))
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(defun diff-next-hunk (&optional count)
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"Move to next (COUNT'th) hunk."
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(interactive "p")
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(unless count (setq count 1))
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(if (< count 0) (diff-prev-hunk (- count))
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(when (looking-at diff-hunk-header-re) (incf count))
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(condition-case ()
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(re-search-forward diff-hunk-header-re nil nil count)
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(error (error "Can't find next hunk")))
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(goto-char (match-beginning 0))))
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(defun diff-prev-hunk (&optional count)
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"Move to previous (COUNT'th) hunk."
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(interactive "p")
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(unless count (setq count 1))
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(if (< count 0) (diff-next-hunk (- count))
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(condition-case ()
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(re-search-backward diff-hunk-header-re nil nil count)
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(error (error "Can't find previous hunk")))))
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(defun diff-next-file (&optional count)
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"Move to next (COUNT'th) file header."
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(interactive "p")
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(unless count (setq count 1))
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(if (< count 0) (diff-prev-file (- count))
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(when (looking-at diff-file-header-re) (incf count))
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(condition-case ()
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(re-search-forward diff-file-header-re nil nil count)
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(error (error "Can't find next file")))
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(goto-char (match-beginning 0))))
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(defun diff-prev-file (&optional count)
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"Move to (COUNT'th) previous file header."
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(interactive "p")
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(unless count (setq count 1))
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(if (< count 0) (diff-next-file (- count))
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(condition-case ()
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(re-search-backward diff-file-header-re nil nil count)
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(error (error "Can't find previous file")))))
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(defun diff-restrict-view (&optional arg)
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"Restrict the view to the current hunk.
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If the prefix ARG is given, restrict the view to the current file instead."
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(interactive "P")
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(save-excursion
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(if arg (diff-beginning-of-file) (diff-beginning-of-hunk))
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(narrow-to-region (point)
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(progn (if arg (diff-end-of-file) (diff-end-of-hunk))
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(point)))
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(set (make-local-variable 'diff-narrowed-to) (if arg 'file 'hunk))))
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(defun diff-kill-hunk ()
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"Kill current hunk."
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(interactive)
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(diff-beginning-of-hunk)
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(let ((start (point))
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(firsthunk (save-excursion
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(ignore-errors
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(diff-beginning-of-file) (diff-next-hunk) (point))))
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(nexthunk (save-excursion
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(ignore-errors
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(diff-next-hunk) (point))))
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(nextfile (save-excursion
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(ignore-errors
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(diff-next-file) (point)))))
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(if (and firsthunk (= firsthunk start)
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(or (null nexthunk)
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(and nextfile (> nexthunk nextfile))))
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;; we're the only hunk for this file, so kill the file
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(diff-kill-file)
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(diff-end-of-hunk)
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(kill-region start (point)))))
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(defun diff-kill-file ()
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"Kill current file's hunks."
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(interactive)
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(diff-beginning-of-file)
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(let* ((start (point))
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(prevhunk (save-excursion
|
||
|
|
(ignore-errors
|
||
|
|
(diff-prev-hunk) (point))))
|
||
|
|
(index (save-excursion
|
||
|
|
(re-search-backward "^Index: " prevhunk t))))
|
||
|
|
(when index (setq start index))
|
||
|
|
(diff-end-of-file)
|
||
|
|
(kill-region start (point))))
|
||
|
|
|
||
|
|
;;;;
|
||
|
|
;;;; jump to other buffers
|
||
|
|
;;;;
|
||
|
|
|
||
|
|
(defun diff-filename-drop-dir (file)
|
||
|
|
(when (string-match "/" file) (substring file (match-end 0))))
|
||
|
|
|
||
|
|
(defun diff-find-file-name (&optional old)
|
||
|
|
"Return the file corresponding to the current patch.
|
||
|
|
Non-nil OLD means that we want the old file."
|
||
|
|
(save-excursion
|
||
|
|
(unless (looking-at diff-file-header-re)
|
||
|
|
(or (ignore-errors (diff-beginning-of-file))
|
||
|
|
(re-search-forward diff-file-header-re nil t)))
|
||
|
|
(let* ((limit (save-excursion
|
||
|
|
(condition-case ()
|
||
|
|
(progn (diff-prev-hunk) (point))
|
||
|
|
(error (point-min)))))
|
||
|
|
(fs (append
|
||
|
|
(when (looking-at "[-*][-*][-*] \\(\\S-+\\)\\s-.*\n[-+][-+][-+] \\(\\S-+\\)\\s-.*$")
|
||
|
|
(list (if old (match-string 1) (match-string 2))
|
||
|
|
(if old (match-string 2) (match-string 1))))
|
||
|
|
(progn (forward-line 1) nil)
|
||
|
|
(when (save-excursion
|
||
|
|
(re-search-backward "^Index: \\(.+\\)" limit t))
|
||
|
|
(list (match-string 1)))
|
||
|
|
(when (re-search-backward "^diff \\(-\\S-+ +\\)*\\(\\S-+\\)\\( +\\(\\S-+\\)\\)?" nil t)
|
||
|
|
(list (if old (match-string 2) (match-string 4))
|
||
|
|
(if old (match-string 4) (match-string 2))))))
|
||
|
|
(fs (delq nil fs))
|
||
|
|
(file
|
||
|
|
;; look for each file in turn. If none found, try again but
|
||
|
|
;; ignoring the first level of directory, ...
|
||
|
|
(do* ((files fs (delq nil (mapcar 'diff-filename-drop-dir files)))
|
||
|
|
(file nil nil))
|
||
|
|
((or (null files)
|
||
|
|
(setq file (do* ((files files (cdr files))
|
||
|
|
(file (car files) (car files)))
|
||
|
|
((or (null file) (file-exists-p file))
|
||
|
|
file))))
|
||
|
|
file))))
|
||
|
|
(or
|
||
|
|
file
|
||
|
|
(and (string-match "\\.rej\\'" (or buffer-file-name ""))
|
||
|
|
(let ((file (substring buffer-file-name 0 (match-beginning 0))))
|
||
|
|
(when (file-exists-p file) file)))
|
||
|
|
;; FIXME: use a more informative prompt
|
||
|
|
(let ((file (read-file-name "File: " nil (first fs) nil (first fs))))
|
||
|
|
;; FIXME: remember for the next invocation
|
||
|
|
file)))))
|
||
|
|
|
||
|
|
(defun diff-goto-source (&optional other-file)
|
||
|
|
"Jump to the corresponding source line.
|
||
|
|
`diff-jump-to-old-file-flag' (or its opposite if the OTHER-FILE prefix arg
|
||
|
|
is give) determines whether to jump to the old or the new file.
|
||
|
|
If the prefix arg is bigger than 8 (for example with \\[universal-argument] \\[universal-argument])
|
||
|
|
then `diff-jump-to-old-file-flag' is also set, for the next invokations."
|
||
|
|
(interactive "P")
|
||
|
|
(save-excursion
|
||
|
|
(let ((old (if (not other-file) diff-jump-to-old-file-flag
|
||
|
|
(not diff-jump-to-old-file-flag))))
|
||
|
|
(when (> (prefix-numeric-value other-file) 8)
|
||
|
|
(setq diff-jump-to-old-file-flag old))
|
||
|
|
(diff-beginning-of-hunk)
|
||
|
|
(let* ((loc (if (not (looking-at "[-@*\n ]*\\([0-9,]+\\)\\([ acd+]+\\([0-9,]+\\)\\)?"))
|
||
|
|
(error "Can't find the hunk header")
|
||
|
|
(if old (match-string 1)
|
||
|
|
(if (match-end 3) (match-string 3)
|
||
|
|
(unless (re-search-forward "^--- \\([0-9,]+\\)" nil t)
|
||
|
|
(error "Can't find the hunk separator"))
|
||
|
|
(match-string 1)))))
|
||
|
|
(lines (if (string-match "^\\([0-9]*\\),\\([0-9]*\\)" loc)
|
||
|
|
(cons (string-to-number (match-string 1 loc))
|
||
|
|
(string-to-number (match-string 2 loc)))
|
||
|
|
(cons (string-to-number loc) nil)))
|
||
|
|
(file (diff-find-file-name old)))
|
||
|
|
(unless file (error "Can't find the file"))
|
||
|
|
(pop-to-buffer (find-file-noselect file))
|
||
|
|
(let* ((line (car lines))
|
||
|
|
(span (if (or (null (cdr lines)) (< (cdr lines) 0)) 0
|
||
|
|
(if (< (cdr lines) line) (cdr lines)
|
||
|
|
(- (cdr lines) line)))))
|
||
|
|
(ignore-errors
|
||
|
|
(goto-line line)
|
||
|
|
(forward-line span)
|
||
|
|
(push-mark (point) t t)
|
||
|
|
(goto-line line)))))))
|
||
|
|
|
||
|
|
|
||
|
|
(defun diff-ediff-patch ()
|
||
|
|
"Call `ediff-patch-file' on the current buffer."
|
||
|
|
(interactive)
|
||
|
|
(condition-case err
|
||
|
|
(ediff-patch-file (current-buffer))
|
||
|
|
(wrong-number-of-arguments (ediff-patch-file))))
|
||
|
|
|
||
|
|
;;;;
|
||
|
|
;;;; Conversion functions
|
||
|
|
;;;;
|
||
|
|
|
||
|
|
;;(defvar diff-inhibit-after-change nil
|
||
|
|
;; "Non-nil means inhibit `diff-mode's after-change functions.")
|
||
|
|
|
||
|
|
(defun diff-unified->context (start end)
|
||
|
|
"Convert unified diffs to context diffs.
|
||
|
|
START and END are either taken from the region (if a prefix arg is given) or
|
||
|
|
else cover the whole bufer."
|
||
|
|
(interactive (if current-prefix-arg
|
||
|
|
(list (mark) (point))
|
||
|
|
(list (point-min) (point-max))))
|
||
|
|
(unless (markerp end) (setq end (copy-marker end)))
|
||
|
|
(let (;;(diff-inhibit-after-change t)
|
||
|
|
(inhibit-read-only t))
|
||
|
|
(save-excursion
|
||
|
|
(goto-char start)
|
||
|
|
(while (and (re-search-forward "^\\(\\(---\\) .+\n\\(\\+\\+\\+\\) .+\\|@@ -\\([0-9]+\\),\\([0-9]+\\) \\+\\([0-9]+\\),\\([0-9]+\\) @@\\)$" nil t)
|
||
|
|
(< (point) end))
|
||
|
|
(combine-after-change-calls
|
||
|
|
(if (match-beginning 2)
|
||
|
|
;;we matched a file header
|
||
|
|
(progn
|
||
|
|
;; use reverse order to make sure the indices are kept valid
|
||
|
|
(replace-match "---" t t nil 3)
|
||
|
|
(replace-match "***" t t nil 2))
|
||
|
|
;; we matched a hunk header
|
||
|
|
(let ((line1 (match-string 4))
|
||
|
|
(lines1 (match-string 5))
|
||
|
|
(line2 (match-string 6))
|
||
|
|
(lines2 (match-string 7)))
|
||
|
|
(replace-match
|
||
|
|
(concat "***************\n*** " line1 ","
|
||
|
|
(number-to-string (+ (string-to-number line1)
|
||
|
|
(string-to-number lines1)
|
||
|
|
-1)) " ****"))
|
||
|
|
(forward-line 1)
|
||
|
|
(save-restriction
|
||
|
|
(narrow-to-region (point)
|
||
|
|
(progn (diff-end-of-hunk 'unified) (point)))
|
||
|
|
(let ((hunk (buffer-string)))
|
||
|
|
(goto-char (point-min))
|
||
|
|
(if (not (save-excursion (re-search-forward "^-" nil t)))
|
||
|
|
(delete-region (point) (point-max))
|
||
|
|
(goto-char (point-max))
|
||
|
|
(let ((modif nil) last-pt)
|
||
|
|
(while (progn (setq last-pt (point))
|
||
|
|
(= (forward-line -1) 0))
|
||
|
|
(case (char-after)
|
||
|
|
(? (insert " ") (setq modif nil) (backward-char 1))
|
||
|
|
(?+ (delete-region (point) last-pt) (setq modif t))
|
||
|
|
(?- (if (not modif)
|
||
|
|
(progn (forward-char 1)
|
||
|
|
(insert " "))
|
||
|
|
(delete-char 1)
|
||
|
|
(insert "! "))
|
||
|
|
(backward-char 2))
|
||
|
|
(?\\ (when (save-excursion (forward-line -1)
|
||
|
|
(= (char-after) ?+))
|
||
|
|
(delete-region (point) last-pt) (setq modif t)))
|
||
|
|
(t (setq modif nil))))))
|
||
|
|
(goto-char (point-max))
|
||
|
|
(save-excursion
|
||
|
|
(insert "--- " line2 ","
|
||
|
|
(number-to-string (+ (string-to-number line2)
|
||
|
|
(string-to-number lines2)
|
||
|
|
-1)) " ----\n" hunk))
|
||
|
|
;;(goto-char (point-min))
|
||
|
|
(forward-line 1)
|
||
|
|
(if (not (save-excursion (re-search-forward "^+" nil t)))
|
||
|
|
(delete-region (point) (point-max))
|
||
|
|
(let ((modif nil) (delete nil))
|
||
|
|
(while (not (eobp))
|
||
|
|
(case (char-after)
|
||
|
|
(? (insert " ") (setq modif nil) (backward-char 1))
|
||
|
|
(?- (setq delete t) (setq modif t))
|
||
|
|
(?+ (if (not modif)
|
||
|
|
(progn (forward-char 1)
|
||
|
|
(insert " "))
|
||
|
|
(delete-char 1)
|
||
|
|
(insert "! "))
|
||
|
|
(backward-char 2))
|
||
|
|
(?\\ (when (save-excursion (forward-line 1)
|
||
|
|
(not (eobp)))
|
||
|
|
(setq delete t) (setq modif t)))
|
||
|
|
(t (setq modif nil)))
|
||
|
|
(let ((last-pt (point)))
|
||
|
|
(forward-line 1)
|
||
|
|
(when delete
|
||
|
|
(delete-region last-pt (point))
|
||
|
|
(setq delete nil)))))))))))))))
|
||
|
|
|
||
|
|
(defun diff-context->unified (start end)
|
||
|
|
"Convert context diffs to unified diffs.
|
||
|
|
START and END are either taken from the region (if a prefix arg is given) or
|
||
|
|
else cover the whole bufer."
|
||
|
|
(interactive (if current-prefix-arg
|
||
|
|
(list (mark) (point))
|
||
|
|
(list (point-min) (point-max))))
|
||
|
|
(unless (markerp end) (setq end (copy-marker end)))
|
||
|
|
(let (;;(diff-inhibit-after-change t)
|
||
|
|
(inhibit-read-only t))
|
||
|
|
(save-excursion
|
||
|
|
(goto-char start)
|
||
|
|
(while (and (re-search-forward "^\\(\\(\\*\\*\\*\\) .+\n\\(---\\) .+\\|\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\n\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]+\\) \\*\\*\\*\\*\\)$" nil t)
|
||
|
|
(< (point) end))
|
||
|
|
(combine-after-change-calls
|
||
|
|
(if (match-beginning 2)
|
||
|
|
;; we matched a file header
|
||
|
|
(progn
|
||
|
|
;; use reverse order to make sure the indices are kept valid
|
||
|
|
(replace-match "+++" t t nil 3)
|
||
|
|
(replace-match "---" t t nil 2))
|
||
|
|
;; we matched a hunk header
|
||
|
|
(let ((line1s (match-string 4))
|
||
|
|
(line1e (match-string 5))
|
||
|
|
(pt1 (match-beginning 0)))
|
||
|
|
(replace-match "")
|
||
|
|
(unless (re-search-forward
|
||
|
|
"^--- \\([0-9]+\\),\\(-?[0-9]+\\) ----$" nil t)
|
||
|
|
(error "Can't find matching `--- n1,n2 ----' line"))
|
||
|
|
(let ((line2s (match-string 1))
|
||
|
|
(line2e (match-string 2))
|
||
|
|
(pt2 (progn
|
||
|
|
(delete-region (progn (beginning-of-line) (point))
|
||
|
|
(progn (forward-line 1) (point)))
|
||
|
|
(point-marker))))
|
||
|
|
(goto-char pt1)
|
||
|
|
(forward-line 1)
|
||
|
|
(while (< (point) pt2)
|
||
|
|
(case (char-after)
|
||
|
|
((?! ?-) (delete-char 2) (insert "-") (forward-line 1))
|
||
|
|
(?\ ;merge with the other half of the chunk
|
||
|
|
(let* ((endline2
|
||
|
|
(save-excursion
|
||
|
|
(goto-char pt2) (forward-line 1) (point)))
|
||
|
|
(c (char-after pt2)))
|
||
|
|
(case c
|
||
|
|
((?! ?+)
|
||
|
|
(insert "+"
|
||
|
|
(prog1 (buffer-substring (+ pt2 2) endline2)
|
||
|
|
(delete-region pt2 endline2))))
|
||
|
|
(?\ ;FIXME: check consistency
|
||
|
|
(delete-region pt2 endline2)
|
||
|
|
(delete-char 1)
|
||
|
|
(forward-line 1))
|
||
|
|
(?\\ (forward-line 1))
|
||
|
|
(t (delete-char 1) (forward-line 1)))))
|
||
|
|
(t (forward-line 1))))
|
||
|
|
(while (looking-at "[+! ] ")
|
||
|
|
(if (/= (char-after) ?!) (forward-char 1)
|
||
|
|
(delete-char 1) (insert "+"))
|
||
|
|
(delete-char 1) (forward-line 1))
|
||
|
|
(save-excursion
|
||
|
|
(goto-char pt1)
|
||
|
|
(insert "@@ -" line1s ","
|
||
|
|
(number-to-string (- (string-to-number line1e)
|
||
|
|
(string-to-number line1s)
|
||
|
|
-1))
|
||
|
|
" +" line2s ","
|
||
|
|
(number-to-string (- (string-to-number line2e)
|
||
|
|
(string-to-number line2s)
|
||
|
|
-1)) " @@"))))))))))
|
||
|
|
|
||
|
|
(defun diff-reverse-direction (start end)
|
||
|
|
"Reverse the direction of the diffs.
|
||
|
|
START and END are either taken from the region (if a prefix arg is given) or
|
||
|
|
else cover the whole bufer."
|
||
|
|
(interactive (if current-prefix-arg
|
||
|
|
(list (mark) (point))
|
||
|
|
(list (point-min) (point-max))))
|
||
|
|
(unless (markerp end) (setq end (copy-marker end)))
|
||
|
|
(let (;;(diff-inhibit-after-change t)
|
||
|
|
(inhibit-read-only t))
|
||
|
|
(save-excursion
|
||
|
|
(goto-char start)
|
||
|
|
(while (and (re-search-forward "^\\(\\([-*][-*][-*] \\)\\(.+\\)\n\\([-+][-+][-+] \\)\\(.+\\)\\|\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\\*\n\\*\\*\\* \\(.+\\) \\*\\*\\*\\*\\|@@ -\\(.+\\) \\+\\(.+\\) @@\\)$" nil t)
|
||
|
|
(< (point) end))
|
||
|
|
(combine-after-change-calls
|
||
|
|
(cond
|
||
|
|
;; a file header
|
||
|
|
((match-beginning 2) (replace-match "\\2\\5\n\\4\\3" nil))
|
||
|
|
;; a context-diff hunk header
|
||
|
|
((match-beginning 6)
|
||
|
|
(let ((pt-lines1 (match-beginning 6))
|
||
|
|
(lines1 (match-string 6)))
|
||
|
|
(replace-match "" nil nil nil 6)
|
||
|
|
(forward-line 1)
|
||
|
|
(let ((half1s (point)))
|
||
|
|
(while (looking-at "[-! \\][ \t]")
|
||
|
|
(when (= (char-after) ?-) (delete-char 1) (insert "+"))
|
||
|
|
(forward-line 1))
|
||
|
|
(let ((half1 (buffer-substring half1s (point))))
|
||
|
|
(delete-region half1s (point))
|
||
|
|
(unless (looking-at "^--- \\([0-9]+,-?[0-9]+\\) ----$")
|
||
|
|
(insert half1)
|
||
|
|
(error "Can't find matching `--- n1,n2 ----' line"))
|
||
|
|
(let ((str1 (match-string 1)))
|
||
|
|
(replace-match lines1 nil nil nil 1)
|
||
|
|
(forward-line 1)
|
||
|
|
(let ((half2s (point)))
|
||
|
|
(while (looking-at "[!+ \\][ \t]")
|
||
|
|
(when (= (char-after) ?+) (delete-char 1) (insert "-"))
|
||
|
|
(forward-line 1))
|
||
|
|
(let ((half2 (buffer-substring half2s (point))))
|
||
|
|
(delete-region half2s (point))
|
||
|
|
(insert half1)
|
||
|
|
(goto-char half1s)
|
||
|
|
(insert half2)))
|
||
|
|
(goto-char pt-lines1)
|
||
|
|
(insert str1))))))
|
||
|
|
;; a unified-diff hunk header
|
||
|
|
((match-beginning 7)
|
||
|
|
(replace-match "@@ -\\8 +\\7 @@" nil)
|
||
|
|
(forward-line 1)
|
||
|
|
(let ((c (char-after)) first last)
|
||
|
|
(while (case (setq c (char-after))
|
||
|
|
(?- (setq first (or first (point)))
|
||
|
|
(delete-char 1) (insert "+") t)
|
||
|
|
(?+ (setq last (or last (point)))
|
||
|
|
(delete-char 1) (insert "-") t)
|
||
|
|
(?\\ t)
|
||
|
|
(t (when (and first last (< first last))
|
||
|
|
(let ((str (buffer-substring first last)))
|
||
|
|
(save-excursion (delete-region first last))
|
||
|
|
(insert str)))
|
||
|
|
(setq first nil last nil)
|
||
|
|
(equal ?\ c)))
|
||
|
|
(forward-line 1))))))))))
|
||
|
|
|
||
|
|
(defun diff-fixup-modifs (start end)
|
||
|
|
"Fixup the hunk headers (in case the buffer was modified).
|
||
|
|
START and END are either taken from the region (if a prefix arg is given) or
|
||
|
|
else cover the whole bufer."
|
||
|
|
(interactive (if current-prefix-arg
|
||
|
|
(list (mark) (point))
|
||
|
|
(list (point-min) (point-max))))
|
||
|
|
(let ((inhibit-read-only t))
|
||
|
|
(save-excursion
|
||
|
|
(goto-char end) (diff-end-of-hunk)
|
||
|
|
(let ((plus 0) (minus 0) (space 0) (bang 0))
|
||
|
|
(while (and (= (forward-line -1) 0) (<= start (point)))
|
||
|
|
(if (not (looking-at "\\(@@ .+ @@\\|[-*][-*][-*] .+ [-*][-*][-*][-*]\\)$"))
|
||
|
|
(case (char-after)
|
||
|
|
(?\ (incf space))
|
||
|
|
(?+ (incf plus))
|
||
|
|
(?- (incf minus))
|
||
|
|
(?! (incf bang))
|
||
|
|
(?\\ nil)
|
||
|
|
(t (setq space 0 plus 0 minus 0 bang 0)))
|
||
|
|
(cond
|
||
|
|
((looking-at "@@ -[0-9]+,\\([0-9]*\\) \\+[0-9]+,\\([0-9]*\\) @@$")
|
||
|
|
(let* ((old1 (match-string 1))
|
||
|
|
(old2 (match-string 2))
|
||
|
|
(new1 (number-to-string (+ space minus)))
|
||
|
|
(new2 (number-to-string (+ space plus))))
|
||
|
|
(unless (string= new2 old2) (replace-match new2 t t nil 2))
|
||
|
|
(unless (string= new1 old1) (replace-match new1 t t nil 1))))
|
||
|
|
((looking-at "--- \\([0-9]+\\),\\([0-9]*\\) ----$")
|
||
|
|
(when (> (+ space bang plus) 0)
|
||
|
|
(let* ((old1 (match-string 1))
|
||
|
|
(old2 (match-string 2))
|
||
|
|
(new (number-to-string
|
||
|
|
(+ space bang plus -1 (string-to-number old1)))))
|
||
|
|
(unless (string= new old2) (replace-match new t t nil 2)))))
|
||
|
|
((looking-at "\\*\\*\\* \\([0-9]+\\),\\(-?[0-9]*\\) \\*\\*\\*\\*$")
|
||
|
|
(when (> (+ space bang minus) 0)
|
||
|
|
(let* ((old (match-string 1))
|
||
|
|
(new (format
|
||
|
|
(concat "%0" (number-to-string (length old)) "d")
|
||
|
|
(+ space bang minus -1 (string-to-number old)))))
|
||
|
|
(unless (string= new old) (replace-match new t t nil 2))))))
|
||
|
|
(setq space 0 plus 0 minus 0 bang 0)))))))
|
||
|
|
|
||
|
|
;;;;
|
||
|
|
;;;; Hooks
|
||
|
|
;;;;
|
||
|
|
|
||
|
|
(defun diff-write-contents-hooks ()
|
||
|
|
"Fixup hunk headers if necessary."
|
||
|
|
(if (buffer-modified-p) (diff-fixup-modifs (point-min) (point-max)))
|
||
|
|
nil)
|
||
|
|
|
||
|
|
;; XEmacs doesn't seem to have this feature
|
||
|
|
(defvar undo-in-progress nil)
|
||
|
|
|
||
|
|
;; It turns out that making changes in the buffer from within an
|
||
|
|
;; *-change-function is asking for trouble, whereas making them
|
||
|
|
;; from a post-command-hook doesn't pose much problems
|
||
|
|
(defvar diff-unhandled-changes nil)
|
||
|
|
(defun diff-after-change-function (beg end len)
|
||
|
|
"Remember to fixup the hunk header.
|
||
|
|
See `after-change-functions' for the meaning of BEG, END and LEN."
|
||
|
|
(when (and (not undo-in-progress) (not inhibit-read-only))
|
||
|
|
(if diff-unhandled-changes
|
||
|
|
(setq diff-unhandled-changes
|
||
|
|
(cons (min beg (car diff-unhandled-changes))
|
||
|
|
(max beg (cdr diff-unhandled-changes))))
|
||
|
|
(setq diff-unhandled-changes (cons beg end)))))
|
||
|
|
|
||
|
|
(defun diff-post-command-hook ()
|
||
|
|
"Fixup hunk headers if necessary."
|
||
|
|
(when (consp diff-unhandled-changes)
|
||
|
|
(ignore-errors
|
||
|
|
(save-excursion
|
||
|
|
(goto-char (car diff-unhandled-changes)) (diff-beginning-of-hunk)
|
||
|
|
(diff-fixup-modifs (point) (cdr diff-unhandled-changes))))
|
||
|
|
(setq diff-unhandled-changes nil)))
|
||
|
|
|
||
|
|
;;;;
|
||
|
|
;;;; The main function
|
||
|
|
;;;;
|
||
|
|
|
||
|
|
;;(autoload 'diff-mode "diff-mode" "Major mode for viewing context diffs." t)
|
||
|
|
;;;###autoload
|
||
|
|
(defun diff-mode ()
|
||
|
|
"Major mode for viewing context diffs.
|
||
|
|
Supports unified and context diffs as well as (to a lesser extent) normal diffs.
|
||
|
|
When the buffer is read-only, the ESC prefix is not necessary.
|
||
|
|
This mode runs `diff-mode-hook'.
|
||
|
|
\\{diff-mode-map}"
|
||
|
|
(interactive)
|
||
|
|
(kill-all-local-variables)
|
||
|
|
(setq major-mode 'diff-mode)
|
||
|
|
(setq mode-name "Diff")
|
||
|
|
(use-local-map diff-mode-map)
|
||
|
|
(set (make-local-variable 'font-lock-defaults) diff-font-lock-defaults)
|
||
|
|
(set (make-local-variable 'outline-regexp) diff-outline-regexp)
|
||
|
|
;; compile support
|
||
|
|
(set (make-local-variable 'compilation-file-regexp-alist)
|
||
|
|
diff-file-regexp-alist)
|
||
|
|
(set (make-local-variable 'compilation-error-regexp-alist)
|
||
|
|
diff-error-regexp-alist)
|
||
|
|
(when (string-match "\\.rej\\'" (or buffer-file-name ""))
|
||
|
|
(set (make-local-variable 'compilation-current-file)
|
||
|
|
(substring buffer-file-name 0 (match-beginning 0))))
|
||
|
|
(compilation-shell-minor-mode 1)
|
||
|
|
;;
|
||
|
|
(setq buffer-read-only t)
|
||
|
|
(if (not diff-update-on-the-fly-flag)
|
||
|
|
(add-hook 'write-contents-hooks 'diff-write-contents-hooks)
|
||
|
|
(make-local-variable 'diff-unhandled-changes)
|
||
|
|
(make-local-hook 'after-change-functions)
|
||
|
|
(add-hook 'after-change-functions 'diff-after-change-function nil t)
|
||
|
|
(make-local-hook 'post-command-hook)
|
||
|
|
(add-hook 'post-command-hook 'diff-post-command-hook nil t))
|
||
|
|
;; Neat trick from Dave Love to add more bindings in read-only mode:
|
||
|
|
(add-to-list (make-local-variable 'minor-mode-map-alist)
|
||
|
|
(cons 'buffer-read-only diff-mode-shared-map))
|
||
|
|
;;
|
||
|
|
(run-hooks 'diff-mode-hook))
|
||
|
|
|
||
|
|
;;;###autoload
|
||
|
|
(add-to-list 'auto-mode-alist '("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode))
|
||
|
|
|
||
|
|
;; provide the package
|
||
|
|
(provide 'diff-mode)
|
||
|
|
|
||
|
|
;;; Change Log:
|
||
|
|
;; diff-mode.el,v
|
||
|
|
;; Revision 1.11 1999/10/09 23:38:29 monnier
|
||
|
|
;; (diff-mode-load-hook): dropped.
|
||
|
|
;; (auto-mode-alist): also catch *.diffs.
|
||
|
|
;; (diff-find-file-name, diff-mode): add smarts to find the right file
|
||
|
|
;; for *.rej files (that lack any file name indication).
|
||
|
|
;;
|
||
|
|
;; Revision 1.10 1999/09/30 15:32:11 monnier
|
||
|
|
;; added support for "\ No newline at end of file".
|
||
|
|
;;
|
||
|
|
;; Revision 1.9 1999/09/15 00:01:13 monnier
|
||
|
|
;; - added basic `compile' support.
|
||
|
|
;; - have diff-kill-hunk call diff-kill-file if it's the only hunk.
|
||
|
|
;; - diff-kill-file now tries to kill the leading garbage as well.
|
||
|
|
;;
|
||
|
|
;; Revision 1.8 1999/09/13 21:10:09 monnier
|
||
|
|
;; - don't use CL in the autoloaded code
|
||
|
|
;; - accept diffs using -T
|
||
|
|
;;
|
||
|
|
;; Revision 1.7 1999/09/05 20:53:03 monnier
|
||
|
|
;; interface to ediff-patch
|
||
|
|
;;
|
||
|
|
;; Revision 1.6 1999/09/01 20:55:13 monnier
|
||
|
|
;; (ediff=patch-file): add bindings to call ediff-patch.
|
||
|
|
;; (diff-find-file-name): taken out of diff-goto-source.
|
||
|
|
;; (diff-unified->context, diff-context->unified, diff-reverse-direction,
|
||
|
|
;; diff-fixup-modifs): only use the region if a prefix arg is given.
|
||
|
|
;;
|
||
|
|
;; Revision 1.5 1999/08/31 19:18:52 monnier
|
||
|
|
;; (diff-beginning-of-file, diff-prev-file): fixed wrong parenthesis.
|
||
|
|
;;
|
||
|
|
;; Revision 1.4 1999/08/31 13:01:44 monnier
|
||
|
|
;; use `combine-after-change-calls' to minimize the slowdown of font-lock.
|
||
|
|
;;
|
||
|
|
|
||
|
|
;;; diff-mode.el ends here
|