| 1 | ;;; misearch.el --- isearch extensions for multi-buffer search |
| 2 | |
| 3 | ;; Copyright (C) 2007, 2008 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Juri Linkov <juri@jurta.org> |
| 6 | ;; Keywords: matching |
| 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 3 of the License, or |
| 13 | ;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | ;;; Commentary: |
| 24 | |
| 25 | ;; This file adds more dimensions to the search space. It implements |
| 26 | ;; various features that extend isearch. One of them is an ability to |
| 27 | ;; search through multiple buffers. |
| 28 | |
| 29 | ;;; Code: |
| 30 | |
| 31 | ;;; Search multiple buffers |
| 32 | |
| 33 | ;;;###autoload (add-hook 'isearch-mode-hook 'multi-isearch-setup) |
| 34 | |
| 35 | (defgroup multi-isearch nil |
| 36 | "Using isearch to search through multiple buffers." |
| 37 | :version "23.1" |
| 38 | :group 'isearch) |
| 39 | |
| 40 | (defcustom multi-isearch-search t |
| 41 | "Non-nil enables searching multiple related buffers, in certain modes." |
| 42 | :type 'boolean |
| 43 | :version "23.1" |
| 44 | :group 'multi-isearch) |
| 45 | |
| 46 | (defcustom multi-isearch-pause t |
| 47 | "A choice defining where to pause the search. |
| 48 | If the value is nil, don't pause before going to the next buffer. |
| 49 | If the value is `initial', pause only after a failing search in the |
| 50 | initial buffer. |
| 51 | If t, pause in all buffers that contain the search string." |
| 52 | :type '(choice |
| 53 | (const :tag "Don't pause" nil) |
| 54 | (const :tag "Only in initial buffer" initial) |
| 55 | (const :tag "All buffers" t)) |
| 56 | :version "23.1" |
| 57 | :group 'multi-isearch) |
| 58 | |
| 59 | ;;;###autoload |
| 60 | (defvar multi-isearch-next-buffer-function nil |
| 61 | "Function to call to get the next buffer to search. |
| 62 | |
| 63 | When this variable is set to a function that returns a buffer, then |
| 64 | after typing another \\[isearch-forward] or \\[isearch-backward] \ |
| 65 | at a failing search, the search goes |
| 66 | to the next buffer in the series and continues searching for the |
| 67 | next occurrence. |
| 68 | |
| 69 | The first argument of this function is the current buffer where the |
| 70 | search is currently searching. It defines the base buffer relative to |
| 71 | which this function should find the next buffer. When the isearch |
| 72 | direction is backward (when `isearch-forward' is nil), this function |
| 73 | should return the previous buffer to search. If the second argument of |
| 74 | this function WRAP is non-nil, then it should return the first buffer |
| 75 | in the series; and for the backward search, it should return the last |
| 76 | buffer in the series.") |
| 77 | |
| 78 | ;;;###autoload |
| 79 | (defvar multi-isearch-next-buffer-current-function nil |
| 80 | "The currently active function to get the next buffer to search. |
| 81 | Initialized from `multi-isearch-next-buffer-function' when |
| 82 | Isearch starts.") |
| 83 | |
| 84 | ;;;###autoload |
| 85 | (defvar multi-isearch-current-buffer nil |
| 86 | "The buffer where the search is currently searching. |
| 87 | The value is nil when the search still is in the initial buffer.") |
| 88 | |
| 89 | (defvar multi-isearch-orig-search-fun nil) |
| 90 | (defvar multi-isearch-orig-wrap nil) |
| 91 | (defvar multi-isearch-orig-push-state nil) |
| 92 | |
| 93 | \f |
| 94 | ;;;###autoload |
| 95 | (defun multi-isearch-setup () |
| 96 | "Set up isearch to search multiple buffers. |
| 97 | Intended to be added to `isearch-mode-hook'." |
| 98 | (when (and multi-isearch-search |
| 99 | multi-isearch-next-buffer-function) |
| 100 | (setq multi-isearch-current-buffer nil |
| 101 | multi-isearch-next-buffer-current-function |
| 102 | multi-isearch-next-buffer-function |
| 103 | multi-isearch-orig-search-fun |
| 104 | (default-value 'isearch-search-fun-function) |
| 105 | multi-isearch-orig-wrap |
| 106 | (default-value 'isearch-wrap-function) |
| 107 | multi-isearch-orig-push-state |
| 108 | (default-value 'isearch-push-state-function)) |
| 109 | (setq-default isearch-search-fun-function 'multi-isearch-search-fun |
| 110 | isearch-wrap-function 'multi-isearch-wrap |
| 111 | isearch-push-state-function 'multi-isearch-push-state) |
| 112 | (add-hook 'isearch-mode-end-hook 'multi-isearch-end))) |
| 113 | |
| 114 | (defun multi-isearch-end () |
| 115 | "Clean up the multi-buffer search after terminating isearch." |
| 116 | (setq multi-isearch-current-buffer nil |
| 117 | multi-isearch-next-buffer-current-function nil) |
| 118 | (setq-default isearch-search-fun-function multi-isearch-orig-search-fun |
| 119 | isearch-wrap-function multi-isearch-orig-wrap |
| 120 | isearch-push-state-function multi-isearch-orig-push-state) |
| 121 | (remove-hook 'isearch-mode-end-hook 'multi-isearch-end)) |
| 122 | |
| 123 | (defun multi-isearch-search-fun () |
| 124 | "Return the proper search function, for isearch in multiple buffers." |
| 125 | (lambda (string bound noerror) |
| 126 | (let ((search-fun |
| 127 | ;; Use standard functions to search within one buffer |
| 128 | (cond |
| 129 | (isearch-word |
| 130 | (if isearch-forward 'word-search-forward 'word-search-backward)) |
| 131 | (isearch-regexp |
| 132 | (if isearch-forward 're-search-forward 're-search-backward)) |
| 133 | (t |
| 134 | (if isearch-forward 'search-forward 'search-backward)))) |
| 135 | found buffer) |
| 136 | (or |
| 137 | ;; 1. First try searching in the initial buffer |
| 138 | (let ((res (funcall search-fun string bound noerror))) |
| 139 | ;; Reset wrapping for all-buffers pause after successful search |
| 140 | (if (and res (eq multi-isearch-pause t)) |
| 141 | (setq multi-isearch-current-buffer nil)) |
| 142 | res) |
| 143 | ;; 2. If the above search fails, start visiting next/prev buffers |
| 144 | ;; successively, and search the string in them. Do this only |
| 145 | ;; when bound is nil (i.e. not while lazy-highlighting search |
| 146 | ;; strings in the current buffer). |
| 147 | (when (and (not bound) multi-isearch-search) |
| 148 | ;; If no-pause or there was one attempt to leave the current buffer |
| 149 | (if (or (null multi-isearch-pause) |
| 150 | (and multi-isearch-pause multi-isearch-current-buffer)) |
| 151 | (condition-case nil |
| 152 | (progn |
| 153 | (while (not found) |
| 154 | ;; Find the next buffer to search |
| 155 | (setq buffer (funcall multi-isearch-next-buffer-current-function |
| 156 | buffer)) |
| 157 | (with-current-buffer buffer |
| 158 | (goto-char (if isearch-forward (point-min) (point-max))) |
| 159 | (setq isearch-barrier (point) isearch-opoint (point)) |
| 160 | ;; After visiting the next/prev buffer search the |
| 161 | ;; string in it again, until the function in |
| 162 | ;; multi-isearch-next-buffer-current-function raises |
| 163 | ;; an error at the beginning/end of the buffer sequence. |
| 164 | (setq found (funcall search-fun string bound noerror)))) |
| 165 | ;; Set buffer for isearch-search-string to switch |
| 166 | (if buffer (setq multi-isearch-current-buffer buffer)) |
| 167 | ;; Return point of the new search result |
| 168 | found) |
| 169 | ;; Return nil when multi-isearch-next-buffer-current-function fails |
| 170 | (error nil)) |
| 171 | (signal 'search-failed (list string "Repeat for next buffer")))))))) |
| 172 | |
| 173 | (defun multi-isearch-wrap () |
| 174 | "Wrap the multiple buffers search when search is failed. |
| 175 | Switch buffer to the first buffer for a forward search, |
| 176 | or to the last buffer for a backward search. |
| 177 | Set `multi-isearch-current-buffer' to the current buffer to display |
| 178 | the isearch suffix message [initial buffer] only when isearch leaves |
| 179 | the initial buffer." |
| 180 | (if (or (null multi-isearch-pause) |
| 181 | (and multi-isearch-pause multi-isearch-current-buffer)) |
| 182 | (progn |
| 183 | (switch-to-buffer |
| 184 | (setq multi-isearch-current-buffer |
| 185 | (funcall multi-isearch-next-buffer-current-function |
| 186 | (current-buffer) t))) |
| 187 | (goto-char (if isearch-forward (point-min) (point-max)))) |
| 188 | (setq multi-isearch-current-buffer (current-buffer)) |
| 189 | (setq isearch-wrapped nil))) |
| 190 | |
| 191 | (defun multi-isearch-push-state () |
| 192 | "Save a function restoring the state of multiple buffers search. |
| 193 | Save the current buffer to the additional state parameter in the |
| 194 | search status stack." |
| 195 | `(lambda (cmd) |
| 196 | (multi-isearch-pop-state cmd ,(current-buffer)))) |
| 197 | |
| 198 | (defun multi-isearch-pop-state (cmd buffer) |
| 199 | "Restore the multiple buffers search state. |
| 200 | Switch to the buffer restored from the search status stack." |
| 201 | (unless (equal buffer (current-buffer)) |
| 202 | (switch-to-buffer (setq multi-isearch-current-buffer buffer)))) |
| 203 | |
| 204 | \f |
| 205 | ;;; Global multi-buffer search invocations |
| 206 | |
| 207 | (defvar multi-isearch-buffer-list nil) |
| 208 | |
| 209 | (defun multi-isearch-next-buffer-from-list (&optional buffer wrap) |
| 210 | "Return the next buffer in the series of ChangeLog file buffers. |
| 211 | This function is used for multiple buffers isearch. |
| 212 | A sequence of buffers is formed by ChangeLog files with decreasing |
| 213 | numeric file name suffixes in the directory of the initial ChangeLog |
| 214 | file were isearch was started." |
| 215 | (let ((buffers (if isearch-forward |
| 216 | multi-isearch-buffer-list |
| 217 | (reverse multi-isearch-buffer-list)))) |
| 218 | (if wrap |
| 219 | (car buffers) |
| 220 | (cadr (member (or buffer (current-buffer)) buffers))))) |
| 221 | |
| 222 | ;;;###autoload |
| 223 | (defun multi-isearch-buffers (buffers) |
| 224 | "Start multi-buffer Isearch on a list of BUFFERS." |
| 225 | (let ((multi-isearch-next-buffer-function |
| 226 | 'multi-isearch-next-buffer-from-list) |
| 227 | (multi-isearch-buffer-list buffers)) |
| 228 | (switch-to-buffer (car buffers)) |
| 229 | (goto-char (if isearch-forward (point-min) (point-max))) |
| 230 | (isearch-forward))) |
| 231 | |
| 232 | ;;;###autoload |
| 233 | (defun multi-isearch-buffers-regexp (buffers) |
| 234 | "Start multi-buffer regexp Isearch on a list of BUFFERS." |
| 235 | (let ((multi-isearch-next-buffer-function |
| 236 | 'multi-isearch-next-buffer-from-list) |
| 237 | (multi-isearch-buffer-list buffers)) |
| 238 | (switch-to-buffer (car buffers)) |
| 239 | (goto-char (if isearch-forward (point-min) (point-max))) |
| 240 | (isearch-forward-regexp))) |
| 241 | |
| 242 | \f |
| 243 | ;;; Global multi-file search invocations |
| 244 | |
| 245 | (defvar multi-isearch-file-list nil) |
| 246 | |
| 247 | (defun multi-isearch-next-file-buffer-from-list (&optional buffer wrap) |
| 248 | "Return the next buffer in the series of ChangeLog file buffers. |
| 249 | This function is used for multiple buffers isearch. |
| 250 | A sequence of buffers is formed by ChangeLog files with decreasing |
| 251 | numeric file name suffixes in the directory of the initial ChangeLog |
| 252 | file were isearch was started." |
| 253 | (let ((files (if isearch-forward |
| 254 | multi-isearch-file-list |
| 255 | (reverse multi-isearch-file-list)))) |
| 256 | (find-file-noselect |
| 257 | (if wrap |
| 258 | (car files) |
| 259 | (cadr (member (buffer-file-name buffer) files)))))) |
| 260 | |
| 261 | ;;;###autoload |
| 262 | (defun multi-isearch-files (files) |
| 263 | "Start multi-buffer Isearch on a list of FILES." |
| 264 | (let ((multi-isearch-next-buffer-function |
| 265 | 'multi-isearch-next-file-buffer-from-list) |
| 266 | (multi-isearch-file-list files)) |
| 267 | (find-file (car files)) |
| 268 | (goto-char (if isearch-forward (point-min) (point-max))) |
| 269 | (isearch-forward))) |
| 270 | |
| 271 | ;;;###autoload |
| 272 | (defun multi-isearch-files-regexp (files) |
| 273 | "Start multi-buffer regexp Isearch on a list of FILES." |
| 274 | (let ((multi-isearch-next-buffer-function |
| 275 | 'multi-isearch-next-file-buffer-from-list) |
| 276 | (multi-isearch-file-list files)) |
| 277 | (find-file (car files)) |
| 278 | (goto-char (if isearch-forward (point-min) (point-max))) |
| 279 | (isearch-forward-regexp))) |
| 280 | |
| 281 | \f |
| 282 | (provide 'multi-isearch) |
| 283 | |
| 284 | ;; arch-tag: a6d38ffa-4d14-4e39-8ac6-46af9d6a6773 |
| 285 | ;;; misearch.el ends here |