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1 ;;; occur.el --- Show all lines in the current buffer containing a match for REGEXP.
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2
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3 ;; Copyright (C) 1985, 1986, 1987, 1992, 1994, 1996, 1997, 2000, 2001,
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4 ;; 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: internal
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify
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12 ;; it under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful,
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17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 ;; GNU General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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24 ;; Boston, MA 02110-1301, USA.
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25
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26 ;;; Synched up with: FSF 22.0.50.1 (CVS)
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27
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28 (require 'next-error)
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29 (defun query-replace-descr (string)
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30 (mapconcat 'isearch-text-char-description string ""))
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31
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32 (defvar occur-mode-map ()
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33 "Keymap for `occur-mode'.")
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34 (if occur-mode-map
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35 ()
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36 (setq occur-mode-map (make-sparse-keymap))
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37 (set-keymap-name occur-mode-map 'occur-mode-map) ; XEmacs
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38 (define-key occur-mode-map 'button2 'occur-mode-mouse-goto) ; XEmacs
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39 (define-key occur-mode-map "\C-c\C-c" 'occur-mode-goto-occurrence)
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40 (define-key occur-mode-map "\C-m" 'occur-mode-goto-occurrence)
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41 (define-key occur-mode-map "o" 'occur-mode-goto-occurrence-other-window)
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42 (define-key occur-mode-map "\C-o" 'occur-mode-display-occurrence)
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43 (define-key occur-mode-map "\M-n" 'occur-next)
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44 (define-key occur-mode-map "\M-p" 'occur-prev)
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45 (define-key occur-mode-map "r" 'occur-rename-buffer)
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46 (define-key occur-mode-map "c" 'clone-buffer)
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47 (define-key occur-mode-map "g" 'revert-buffer)
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48 (define-key occur-mode-map "q" 'quit-window)
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49 (define-key occur-mode-map "z" 'kill-this-buffer)
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50 (define-key occur-mode-map "\C-c\C-f" 'next-error-follow-minor-mode))
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51
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52 (defvar occur-revert-arguments nil
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53 "Arguments to pass to `occur-1' to revert an Occur mode buffer.
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54 See `occur-revert-function'.")
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55
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56 (defcustom occur-mode-hook nil ; XEmacs
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57 "Hook run when entering Occur mode."
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58 :type 'hook
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59 :group 'matching)
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60
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61 (defcustom occur-hook nil
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62 "Hook run by Occur when there are any matches."
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63 :type 'hook
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64 :group 'matching)
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65
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66 (put 'occur-mode 'mode-class 'special)
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67 ;;;###autoload
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68 (defun occur-mode ()
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69 "Major mode for output from \\[occur].
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70 \\<occur-mode-map>Move point to one of the items in this buffer, then use
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71 \\[occur-mode-goto-occurrence] to go to the occurrence that the item refers to.
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72 Alternatively, click \\[occur-mode-mouse-goto] on an item to go to it.
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73
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74 \\{occur-mode-map}"
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75 (interactive)
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76 (kill-all-local-variables)
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77 (use-local-map occur-mode-map)
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78 (setq major-mode 'occur-mode)
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79 (setq mode-name (gettext "Occur")) ; XEmacs
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80 (set (make-local-variable 'revert-buffer-function) 'occur-revert-function)
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81 (make-local-variable 'occur-revert-arguments)
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82 (add-hook 'change-major-mode-hook 'turn-off-font-lock t t)
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83 (setq next-error-function 'occur-next-error)
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84 (require 'mode-motion) ; XEmacs
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85 (setq mode-motion-hook 'mode-motion-highlight-line) ; XEmacs
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86 (run-mode-hooks 'occur-mode-hook))
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87
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88 (defun occur-revert-function (ignore1 ignore2)
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89 "Handle `revert-buffer' for Occur mode buffers."
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90 (apply 'occur-1 (append occur-revert-arguments (list (buffer-name)))))
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91
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92 ;; FSF Version of next function:
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93 ; (defun occur-mode-mouse-goto (event)
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94 ; "In Occur mode, go to the occurrence whose line you click on."
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95 ; (interactive "e")
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96 ; (let (pos)
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97 ; (save-excursion
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98 ; (set-buffer (window-buffer (posn-window (event-end event))))
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99 ; (save-excursion
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100 ; (goto-char (posn-point (event-end event)))
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101 ; (setq pos (occur-mode-find-occurrence))))
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102 ; (pop-to-buffer (marker-buffer pos))
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103 ; (goto-char pos)))
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104
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105 (defun occur-mode-mouse-goto (event)
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106 "Go to the occurrence highlighted by mouse.
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107 This function should be bound to a mouse key in the `*Occur*' buffer."
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108 (interactive "e")
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109 (let ((window-save (selected-window))
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110 (frame-save (selected-frame)))
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111 ;; preserve the window/frame setup
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112 (unwind-protect
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113 (progn
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114 (mouse-set-point event)
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115 (occur-mode-goto-occurrence))
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116 (select-frame frame-save)
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117 (select-window window-save))))
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118
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119 (defun occur-mode-find-occurrence ()
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120 (let ((pos (get-text-property (point) 'occur-target)))
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121 (unless pos
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122 (error "No occurrence on this line"))
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123 (unless (buffer-live-p (marker-buffer pos))
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124 (error "Buffer for this occurrence was killed"))
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125 pos))
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126
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127 (defun occur-mode-goto-occurrence ()
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128 "Go to the occurrence the current line describes."
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129 (interactive)
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130 (let ((pos (occur-mode-find-occurrence)))
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131 (pop-to-buffer (marker-buffer pos))
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132 (goto-char pos)))
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133
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134 (defun occur-mode-goto-occurrence-other-window ()
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135 "Go to the occurrence the current line describes, in another window."
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136 (interactive)
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137 (let ((pos (occur-mode-find-occurrence)))
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138 (switch-to-buffer-other-window (marker-buffer pos))
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139 (goto-char pos)))
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140
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141 (defun occur-mode-display-occurrence ()
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142 "Display in another window the occurrence the current line describes."
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143 (interactive)
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144 (let ((pos (occur-mode-find-occurrence))
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145 window
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146 ;; Bind these to ensure `display-buffer' puts it in another window.
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147 same-window-buffer-names
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148 same-window-regexps)
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149 (setq window (display-buffer (marker-buffer pos)))
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150 ;; This is the way to set point in the proper window.
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151 (save-selected-window
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152 (select-window window)
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153 (goto-char pos))))
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154
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155 (defun occur-find-match (n search message)
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156 (if (not n) (setq n 1))
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157 (let ((r))
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158 (while (> n 0)
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159 (setq r (funcall search (point) 'occur-match))
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160 (and r
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161 (get-text-property r 'occur-match)
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162 (setq r (funcall search r 'occur-match)))
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163 (if r
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164 (goto-char r)
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165 (error message))
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166 (setq n (1- n)))))
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167
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168 (defun occur-next (&optional n)
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169 "Move to the Nth (default 1) next match in an Occur mode buffer."
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170 (interactive "p")
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171 (occur-find-match n #'next-single-property-change "No more matches"))
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172
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173 (defun occur-prev (&optional n)
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174 "Move to the Nth (default 1) previous match in an Occur mode buffer."
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175 (interactive "p")
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176 (occur-find-match n #'previous-single-property-change "No earlier matches"))
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177
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178 (defun occur-next-error (&optional argp reset)
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179 "Move to the Nth (default 1) next match in an Occur mode buffer.
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3299
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180 Compatibility function for \\[next-error-framework-next-error] invocations."
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181 (interactive "p")
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182 ;; we need to run occur-find-match from within the Occur buffer
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183 (with-current-buffer
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184 ;; Choose the buffer and make it current.
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185 (if (next-error-buffer-p (current-buffer))
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186 (current-buffer)
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187 (next-error-find-buffer nil nil
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188 (lambda ()
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189 (eq major-mode 'occur-mode))))
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190
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191 (goto-char (cond (reset (point-min))
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192 ((< argp 0) (line-beginning-position))
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193 ((line-end-position))))
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194 (occur-find-match
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195 (abs argp)
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196 (if (> 0 argp)
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197 #'previous-single-property-change
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198 #'next-single-property-change)
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199 "No more matches")
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200 ;; In case the *Occur* buffer is visible in a nonselected window.
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201 (set-window-point (get-buffer-window (current-buffer)) (point))
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202 (occur-mode-goto-occurrence)))
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203
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204 (defface match
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205 '((((class color) (background light))
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206 (:background "Tan"))
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207 (((class color) (background dark))
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208 (:background "RoyalBlue3"))
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209 (((class color))
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210 (:background "blue" :foreground "white"))
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211 (((type tty) (class mono))
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212 (:inverse-video t))
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213 (t (:background "gray")))
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214 "Face used to highlight matches permanently."
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215 :group 'matching
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216 :version "22.1")
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217
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218 (defcustom list-matching-lines-default-context-lines 0
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219 "*Default number of context lines included around `list-matching-lines' matches.
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220 A negative number means to include that many lines before the match.
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221 A positive number means to include that many lines both before and after."
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222 :type 'integer
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223 :group 'matching)
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224
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3112
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225 ;;;###autoload
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226 (defalias 'list-matching-lines 'occur)
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227
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228 (defcustom list-matching-lines-face 'match
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229 "*Face used by \\[list-matching-lines] to show the text that matches.
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230 If the value is nil, don't highlight the matching portions specially."
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231 :type 'face
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232 :group 'matching)
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233
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234 (defcustom list-matching-lines-buffer-name-face 'underline
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235 "*Face used by \\[list-matching-lines] to show the names of buffers.
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236 If the value is nil, don't highlight the buffer names specially."
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237 :type 'face
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238 :group 'matching)
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239
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240 (defun occur-accumulate-lines (count &optional keep-props)
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241 (save-excursion
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242 (let ((forwardp (> count 0))
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243 result beg end)
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244 (while (not (or (zerop count)
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245 (if forwardp
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246 (eobp)
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247 (bobp))))
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248 (setq count (+ count (if forwardp -1 1)))
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249 (setq beg (line-beginning-position)
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250 end (line-end-position))
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3017
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251 (if (and keep-props (if-boundp 'jit-lock-mode jit-lock-mode)
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252 (text-property-not-all beg end 'fontified t))
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3017
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253 (if-fboundp 'jit-lock-fontify-now
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254 (jit-lock-fontify-now beg end)))
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255 (push
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256 (funcall (if keep-props
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257 #'buffer-substring
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258 #'buffer-substring-no-properties)
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259 beg end)
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260 result)
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261 (forward-line (if forwardp 1 -1)))
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262 (nreverse result))))
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263
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264 (defun occur-read-primary-args ()
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265 (list (let* ((default (or (symbol-near-point)
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266 (and regexp-history
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267 (car regexp-history))))
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268 (minibuffer-history-minimum-string-length 0)
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269 (input
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270 (if default
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271 ;; XEmacs: rewritten for I18N3 snarfing
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272 (read-from-minibuffer
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273 (format "List lines matching regexp (default `%s'): "
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274 default) nil nil nil 'regexp-history nil
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275 default)
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276 (read-from-minibuffer
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277 "List lines matching regexp: "
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278 nil nil nil
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279 'regexp-history))))
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280 (if (equal input "")
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281 default
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282 input))
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283 (when current-prefix-arg
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284 (prefix-numeric-value current-prefix-arg))))
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285
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286 ;;;###autoload
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287 (defun occur-rename-buffer (&optional unique-p interactive-p)
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288 "Rename the current *Occur* buffer to *Occur: original-buffer-name*.
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289 Here `original-buffer-name' is the buffer name were Occur was originally run.
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290 When given the prefix argument, or called non-interactively, the renaming
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291 will not clobber the existing buffer(s) of that name, but use
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292 `generate-new-buffer-name' instead. You can add this to `occur-hook'
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293 if you always want a separate *Occur* buffer for each buffer where you
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294 invoke `occur'."
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295 (interactive "P\np")
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296 (with-current-buffer
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297 (if (eq major-mode 'occur-mode) (current-buffer) (get-buffer "*Occur*"))
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298 (rename-buffer (concat "*Occur: "
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299 (mapconcat #'buffer-name
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300 (car (cddr occur-revert-arguments)) "/")
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301 "*")
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302 (or unique-p (not interactive-p)))))
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303
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304 ;;;###autoload
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305 (defun occur (regexp &optional nlines)
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306 "Show all lines in the current buffer containing a match for REGEXP.
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307 This function can not handle matches that span more than one line.
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308
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309 Each line is displayed with NLINES lines before and after, or -NLINES
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310 before if NLINES is negative.
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311 NLINES defaults to `list-matching-lines-default-context-lines'.
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312 Interactively it is the prefix arg.
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313
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314 The lines are shown in a buffer named `*Occur*'.
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315 It serves as a menu to find any of the occurrences in this buffer.
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316 \\<occur-mode-map>\\[describe-mode] in that buffer will explain how.
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317
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318 If REGEXP contains upper case characters (excluding those preceded by `\\'),
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319 the matching is case-sensitive."
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320 (interactive (occur-read-primary-args))
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321 (occur-1 regexp nlines (list (current-buffer))))
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322
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323 ;;;###autoload
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324 (defun multi-occur (bufs regexp &optional nlines)
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325 "Show all lines in buffers BUFS containing a match for REGEXP.
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326 This function acts on multiple buffers; otherwise, it is exactly like
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327 `occur'."
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328 (interactive
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329 (cons
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330 (let* ((bufs (list (read-buffer "First buffer to search: "
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331 (current-buffer) t)))
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332 (buf nil)
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3299
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333 ; (ido-ignore-item-temp-list bufs)
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334 )
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3000
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335 (while (not (string-equal
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336 (setq buf (read-buffer
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337 (if (and-boundp 'read-buffer-function
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338 '(eq read-buffer-function 'ido-read-buffer))
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339 "Next buffer to search (C-j to end): "
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340 "Next buffer to search (RET to end): ")
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341 nil t))
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342 ""))
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343 (add-to-list 'bufs buf)
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3299
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344 ; (setq ido-ignore-item-temp-list bufs)
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345 )
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3000
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346 (nreverse (mapcar #'get-buffer bufs)))
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347 (occur-read-primary-args)))
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348 (occur-1 regexp nlines bufs))
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349
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350 ;;;###autoload
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351 (defun multi-occur-by-filename-regexp (bufregexp regexp &optional nlines)
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352 "Show all lines matching REGEXP in buffers named by BUFREGEXP.
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353 See also `multi-occur'."
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354 (interactive
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355 (cons
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356 (let* ((default (car regexp-history))
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357 (input
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358 (read-from-minibuffer
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359 "List lines in buffers whose filename matches regexp: "
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360 nil
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361 nil
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362 nil
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363 'regexp-history)))
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364 (if (equal input "")
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365 default
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366 input))
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367 (occur-read-primary-args)))
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368 (when bufregexp
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369 (occur-1 regexp nlines
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370 (delq nil
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371 (mapcar (lambda (buf)
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372 (when (and (buffer-file-name buf)
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373 (string-match bufregexp
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374 (buffer-file-name buf)))
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375 buf))
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376 (buffer-list))))))
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377
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378 (defun occur-1 (regexp nlines bufs &optional buf-name)
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379 (unless buf-name
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380 (setq buf-name "*Occur*"))
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381 (let (occur-buf
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382 (active-bufs (delq nil (mapcar #'(lambda (buf)
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383 (when (buffer-live-p buf) buf))
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384 bufs))))
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385 ;; Handle the case where one of the buffers we're searching is the
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386 ;; output buffer. Just rename it.
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387 (when (member buf-name (mapcar 'buffer-name active-bufs))
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388 (with-current-buffer (get-buffer buf-name)
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389 (rename-uniquely)))
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390
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391 ;; Now find or create the output buffer.
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392 ;; If we just renamed that buffer, we will make a new one here.
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393 (setq occur-buf (get-buffer-create buf-name))
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394
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395 (with-current-buffer occur-buf
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396 (occur-mode)
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397 (let ((inhibit-read-only t))
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398 (erase-buffer)
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399 (let ((count (occur-engine
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400 regexp active-bufs occur-buf
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401 (or nlines list-matching-lines-default-context-lines)
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402 (and case-fold-search
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403 (no-upper-case-p regexp t))
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404 list-matching-lines-buffer-name-face
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405 nil list-matching-lines-face t)))
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406 (let* ((bufcount (length active-bufs))
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407 (diff (- (length bufs) bufcount)))
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408 (message "Searched %d buffer%s%s; %s match%s for `%s'"
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409 bufcount (if (= bufcount 1) "" "s")
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410 (if (zerop diff) "" (format " (%d killed)" diff))
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411 (if (zerop count) "no" (format "%d" count))
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412 (if (= count 1) "" "es")
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413 regexp))
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414 (setq occur-revert-arguments (list regexp nlines bufs))
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415 (if (= count 0)
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416 (kill-buffer occur-buf)
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417 (display-buffer occur-buf)
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418 (setq next-error-last-buffer occur-buf)
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419 (setq buffer-read-only t)
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420 (set-buffer-modified-p nil)
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421 (run-hooks 'occur-hook)))))))
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422
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423 (defun occur-engine-add-prefix (lines)
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424 (mapcar
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425 #'(lambda (line)
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426 (concat " :" line "\n"))
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427 lines))
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428
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429 (defun occur-engine (regexp buffers out-buf nlines case-fold-search
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430 title-face prefix-face match-face keep-props)
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431 (with-current-buffer out-buf
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432 (let ((globalcount 0)
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433 ;; Don't generate undo entries for creation of the initial contents.
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434 (buffer-undo-list t)
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435 (coding nil))
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436 ;; Map over all the buffers
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437 (dolist (buf buffers)
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438 (when (buffer-live-p buf)
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439 (let ((matches 0) ;; count of matched lines
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440 (lines 1) ;; line count
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441 (matchbeg 0)
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442 (origpt nil)
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443 (begpt nil)
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444 (endpt nil)
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445 (marker nil)
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446 (curstring "")
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447 (headerpt (with-current-buffer out-buf (point))))
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448 (save-excursion
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449 (set-buffer buf)
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450 (or coding
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451 ;; Set CODING only if the current buffer locally
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452 ;; binds buffer-file-coding-system.
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453 (not (local-variable-p 'buffer-file-coding-system (current-buffer)))
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454 (setq coding buffer-file-coding-system))
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455 (save-excursion
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456 (goto-char (point-min)) ;; begin searching in the buffer
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457 (while (not (eobp))
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458 (setq origpt (point))
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459 (when (setq endpt (re-search-forward regexp nil t))
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460 (setq matches (1+ matches)) ;; increment match count
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461 (setq matchbeg (match-beginning 0))
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462 (setq lines (+ lines (1- (count-lines origpt endpt))))
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463 (save-excursion
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464 (goto-char matchbeg)
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465 (setq begpt (line-beginning-position)
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466 endpt (line-end-position)))
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467 (setq marker (make-marker))
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468 (set-marker marker matchbeg)
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469 (if (and keep-props
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4103
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470 (if-boundp 'jit-lock-mode jit-lock-mode)
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3000
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471 (text-property-not-all begpt endpt 'fontified t))
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4103
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472 (if-fboundp #'jit-lock-fontify-now
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3000
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473 (jit-lock-fontify-now begpt endpt)))
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474 (setq curstring (buffer-substring begpt endpt))
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475 ;; Depropertize the string, and maybe
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476 ;; highlight the matches
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477 (let ((len (length curstring))
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478 (start 0))
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479 (unless keep-props
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480 (set-text-properties 0 len nil curstring))
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481 (while (and (< start len)
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482 (string-match regexp curstring start))
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483 (add-text-properties
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484 (match-beginning 0) (match-end 0)
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485 (append
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486 `(occur-match t)
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487 (when match-face
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488 ;; Use `face' rather than `font-lock-face' here
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489 ;; so as to override faces copied from the buffer.
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490 `(face ,match-face)))
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491 curstring)
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492 (setq start (match-end 0))))
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493 ;; Generate the string to insert for this match
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494 (let* ((out-line
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495 (concat
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496 ;; Using 7 digits aligns tabs properly.
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497 (apply #'propertize (format "%7d:" lines)
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498 (append
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499 (when prefix-face
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500 `(font-lock-face prefix-face))
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501 '(occur-prefix t)))
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502 ;; We don't put `mouse-face' on the newline,
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503 ;; because that loses. And don't put it
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504 ;; on context lines to reduce flicker.
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505 (propertize curstring 'mouse-face 'highlight)
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506 "\n"))
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507 (data
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508 (if (= nlines 0)
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509 ;; The simple display style
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510 out-line
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511 ;; The complex multi-line display
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512 ;; style. Generate a list of lines,
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513 ;; concatenate them all together.
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514 (apply #'concat
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515 (nconc
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516 (occur-engine-add-prefix (nreverse (cdr (occur-accumulate-lines (- (1+ (abs nlines))) keep-props))))
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517 (list out-line)
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518 (if (> nlines 0)
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519 (occur-engine-add-prefix
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520 (cdr (occur-accumulate-lines (1+ nlines) keep-props)))))))))
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521 ;; Actually insert the match display data
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522 (with-current-buffer out-buf
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523 (let ((beg (point))
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524 (end (progn (insert data) (point))))
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525 (unless (= nlines 0)
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526 (insert "-------\n"))
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527 (add-text-properties
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528 beg end
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529 `(occur-target ,marker help-echo "mouse-2: go to this occurrence")))))
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530 (goto-char endpt))
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531 (if endpt
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532 (progn
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533 (setq lines (1+ lines))
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534 ;; On to the next match...
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535 (forward-line 1))
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536 (goto-char (point-max))))))
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537 (when (not (zerop matches)) ;; is the count zero?
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538 (setq globalcount (+ globalcount matches))
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539 (with-current-buffer out-buf
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540 (goto-char headerpt)
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541 (let ((beg (point))
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542 end)
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543 (insert (format "%d match%s for \"%s\" in buffer: %s\n"
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544 matches (if (= matches 1) "" "es")
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545 regexp (buffer-name buf)))
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546 (setq end (point))
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547 (add-text-properties beg end
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548 (append
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549 (when title-face
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550 `(font-lock-face ,title-face))
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551 `(occur-title ,buf))))
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552 (goto-char (point-min)))))))
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553 (if coding
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554 ;; CODING is buffer-file-coding-system of the first buffer
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555 ;; that locally binds it. Let's use it also for the output
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556 ;; buffer.
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557 (set-buffer-file-coding-system coding))
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558 ;; Return the number of matches
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559 globalcount)))
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560
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561 (provide 'occur)
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