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1 ;;; page-ext.el --- extended page handling commands
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2
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3 ;; You may use these commands to handle an address list or other
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4 ;; small data base.
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5
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6 ;; Copyright (C) 1990, 1991, 1993, 1994 Free Software Foundation
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7
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8 ;; Maintainer: Robert J. Chassell <bob@gnu.ai.mit.edu>
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9
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10 ;; This file is part of GNU Emacs.
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11
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12 ;; GNU Emacs is free software; you can redistribute it and/or modify
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13 ;; it under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; GNU Emacs is distributed in the hope that it will be useful,
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18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;; GNU General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with GNU Emacs; see the file COPYING. If not, write to
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24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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25
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26 ;;; Synched up with: FSF 19.30.
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27
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28
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29 ;;; Summary
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30
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31 ; The current page commands are:
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32
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33 ; forward-page C-x ]
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34 ; backward-page C-x [
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35 ; narrow-to-page C-x p
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36 ; count-lines-page C-x l
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37 ; mark-page C-x C-p (change this to C-x C-p C-m)
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38 ; sort-pages not bound
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39 ; what-page not bound
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40
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41 ; The new page handling commands all use `C-x C-p' as a prefix. This
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42 ; means that the key binding for `mark-page' must be changed.
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43 ; Otherwise, no other changes are made to the current commands or
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44 ; their bindings.
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45
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46 ; New page handling commands:
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47
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48 ; next-page C-x C-p C-n
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49 ; previous-page C-x C-p C-p
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50 ; search-pages C-x C-p C-s
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51 ; add-new-page C-x C-p C-a
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52 ; sort-pages-buffer C-x C-p s
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53 ; set-page-delimiter C-x C-p C-l
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54 ; pages-directory C-x C-p C-d
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55 ; pages-directory-for-addresses C-x C-p d
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56 ; pages-directory-goto C-c C-c
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57
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58
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59 ;;; Using the page commands
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60
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61 ; The page commands are helpful in several different contexts. For
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62 ; example, programmers often divide source files into sections using the
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63 ; `page-delimiter'; you can use the `pages-directory' command to list
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64 ; the sections.
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65
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66 ; You may change the buffer local value of the `page-delimiter' with
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67 ; the `set-page-delimiter' command. This command is bound to `C-x C-p
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68 ; C-l' The command prompts you for a new value for the page-delimiter.
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69 ; Called with a prefix-arg, the command resets the value of the
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70 ; page-delimiter to its original value.
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71
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72 ; You may set several user options:
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73 ;
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74 ; The `pages-directory-buffer-narrowing-p' variable causes the
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75 ; `pages-directory-goto' command to narrow to the destination page.
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76 ;
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77 ; The `pages-directory-for-adding-page-narrowing-p' variable, causes the
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78 ; `add-new-page' command to narrow to the new entry.
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79 ;
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80 ; The `pages-directory-for-adding-new-page-before-current-page-p' variable
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81 ; causes the `add-new-page' command to insert a new page before current
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82 ; page.
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83 ;
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84 ; These variables are true by default.
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85 ;
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86 ; Additional, addresses-related user options are described in the next page
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87 ; of this file.
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88
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89
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90 ;;; Handling an address list or small data base
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91
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92 ; You may use the page commands to handle an address list or other
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93 ; small data base. Put each address or entry on its own page. The
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94 ; first line of text in each page is a `header line' and is listed by
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95 ; the `pages-directory' or `pages-directory-for-addresses' command.
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96
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97 ; Specifically:
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98 ;
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99 ; 1. Begin each entry with a `page-delimiter' (which is, by default,
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100 ; `^L' at the beginning of the line).
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101 ;
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102 ; 2. The first line of text in each entry is the `heading line'; it
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103 ; will appear in the pages-directory-buffer which is constructed
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104 ; using the `C-x C-p C-d' (pages-directory) command or the `C-x
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105 ; C-p d' (pages-directory-for-addresses) command.
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106 ;
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107 ; The heading line may be on the same line as the page-delimiter
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108 ; or it may follow after. It is the first non-blank line on the
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109 ; page. Conventionally, the heading line is placed on the line
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110 ; immediately following the line containing page-delimiter.
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111 ;
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112 ; 3. Follow the heading line with the body of the entry. The body
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113 ; extends up to the next `page-delimiter'. The body may be of any
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114 ; length. It is conventional to place a blank line after the last
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115 ; line of the body.
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116
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117 ; For example, a file might look like this:
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118 ;
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119 ; FSF
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120 ; Free Software Foundation
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121 ; 675 Massachusetts Avenue
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122 ; Cambridge, MA 02139 USA
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123 ; (617) 876-3296
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124 ; gnu@prep.ai.mit.edu
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125 ;
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126 ;
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127 ; House Subcommittee on Intellectual Property,
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128 ; U.S. House of Representatives,
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129 ; Washington, DC 20515
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130 ;
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131 ; Congressional committee concerned with permitting or preventing
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132 ; monopolistic restrictions on the use of software technology.
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133 ;
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134 ;
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135 ; George Lakoff
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136 ; ``Women, Fire, and Dangerous Things:
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137 ; What Categories Reveal about the Mind''
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138 ; 1987, Univ. of Chicago Press
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139 ;
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140 ; About philosophy, Whorfian effects, and linguistics.
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141 ;
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142 ;
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143 ; OBI (On line text collection.)
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144 ; Open Book Initiative
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145 ; c/o Software Tool & Die
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146 ; 1330 Beacon St, Brookline, MA 02146 USA
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147 ; (617) 739-0202
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148 ; obi@world.std.com
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149
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150 ; In this example, the heading lines are:
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151 ;
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152 ; FSF
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153 ; House Subcommittee on Intellectual Property
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154 ; George Lakoff
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155 ; OBI (On line text collection.)
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156
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157 ; The `C-x C-p s' (sort-pages-buffer) command sorts the entries in the
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158 ; buffer alphabetically.
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159
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160 ; You may use any of the page commands, including the `next-page',
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161 ; `previous-page', `add-new-page', `mark-page', and `search-pages'
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162 ; commands.
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163
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164 ; You may use either the `C-x C-p d' (pages-directory-for-addresses)
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165 ; or the `C-x C-p C-d' (pages-directory) command to construct and
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166 ; dislay a directory of all the heading lines.
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167
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168 ; In the directory, you may position the cursor over a heading line
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169 ; and type `C-c C-c' (pages-directory-goto) to go to the entry to
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170 ; which it refers in the pages buffer.
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171
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172 ; You can type `C-c C-p C-a' (add-new-page) to add a new entry in the
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173 ; pages buffer or address file. This is the same command you use to
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174 ; add a new entry when you are in the pages buffer or address file.
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175
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176 ; If you wish, you may create several different directories,
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177 ; one for each different buffer.
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178
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179 ;; `pages-directory-for-addresses' in detail
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180
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181 ; The `pages-directory-for-addresses' assumes a default addresses
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182 ; file. You do not need to specify the addresses file but merely type
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183 ; `C-x C-p d' from any buffer. The command finds the file, constructs
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184 ; a directory for it, and switches you to the directory. If you call
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185 ; the command with a prefix arg, `C-u C-x C-p d', it prompts you for a
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186 ; file name.
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187
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188 ; You may customize the addresses commands:
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189
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190 ; The `pages-addresses-file-name' variable determines the name of
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191 ; the addresses file; by default it is "~/addresses".
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192
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193 ; The `pages-directory-for-addresses-goto-narrowing-p' variable
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194 ; determines whether `pages-directory-goto' narrows the addresses
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195 ; buffer to the entry, which it does by default.
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196
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197 ; The `pages-directory-for-addresses-buffer-keep-windows-p' variable
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198 ; determines whether `pages-directory-for-addresses' deletes other
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199 ; windows to show as many lines as possible on the screen or works
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200 ; in the usual Emacs manner and keeps other windows. Default is to
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201 ; keep other windows.
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202
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203 ; The `pages-directory-for-adding-addresses-narrowing-p' variable
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204 ; determines whether `pages-directory-for-addresses' narrows the
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205 ; addresses buffer to a new entry when you are adding that entry.
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206 ; Default is to narrow to new entry, which means you see a blank
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207 ; screen before you write the new entry.
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208
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209 ;; `pages-directory' in detail
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210
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211 ; Call the `pages-directory' command from the buffer for which you
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212 ; want a directory created; it creates a directory for the buffer and
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213 ; pops you to the directory.
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214
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215 ; The `pages-directory' command has several options:
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216
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217 ; Called with a prefix arg, `C-u C-x C-p C-d', the `pages-directory'
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218 ; prompts you for a regular expression and only lists only those
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219 ; header lines that are part of pages that contain matches to the
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220 ; regexp. In the example above, `C-u C-x C-p C-d 617 RET' would
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221 ; match the telephone area code of the first and fourth entries, so
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222 ; only the header lines of those two entries would appear in the
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223 ; pages-directory-buffer.
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224 ;
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225 ; Called with a numeric argument, the `pages-directory' command
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226 ; lists the number of lines in each page. This is helpful when you
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227 ; are printing hardcopy.
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228
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229 ; Called with a negative numeric argument, the `pages-directory'
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230 ; command lists the lengths of pages whose contents match a regexp.
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231
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232 ;;; Code:
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233
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234
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235 ;;; Customarily customizable variable definitions
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236
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237 (defvar pages-directory-buffer-narrowing-p t
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238 "*If non-nil, `pages-directory-goto' narrows pages buffer to entry.")
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239
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240 (defvar pages-directory-for-adding-page-narrowing-p t
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241 "*If non-nil, `add-new-page' narrows page buffer to new entry.")
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242
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243 (defvar pages-directory-for-adding-new-page-before-current-page-p t
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244 "*If non-nil, `add-new-page' inserts new page before current page.")
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245
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246
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247 ;;; Addresses related variables
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248
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249 (defvar pages-addresses-file-name "~/addresses"
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250 "*Standard name for file of addresses. Entries separated by page-delimiter.
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251 Used by `pages-directory-for-addresses' function.")
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252
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253 (defvar pages-directory-for-addresses-goto-narrowing-p t
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254 "*If non-nil, `pages-directory-goto' narrows addresses buffer to entry.")
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255
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256 (defvar pages-directory-for-addresses-buffer-keep-windows-p t
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257 "*If nil, `pages-directory-for-addresses' deletes other windows.")
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258
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259 (defvar pages-directory-for-adding-addresses-narrowing-p t
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260 "*If non-nil, `add-new-page' narrows addresses buffer to new entry.")
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261
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262
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263 ;;; Key bindings for page handling functions
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264
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265 (global-unset-key "\C-x\C-p")
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266
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267 (defvar ctl-x-ctl-p-map (make-sparse-keymap)
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268 "Keymap for subcommands of C-x C-p, which are for page handling.")
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269
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270 (define-key ctl-x-map "\C-p" 'ctl-x-ctl-p-prefix)
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271 (fset 'ctl-x-ctl-p-prefix ctl-x-ctl-p-map)
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272
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273 (define-key ctl-x-ctl-p-map "\C-n" 'next-page)
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274 (define-key ctl-x-ctl-p-map "\C-p" 'previous-page)
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275 (define-key ctl-x-ctl-p-map "\C-a" 'add-new-page)
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276 (define-key ctl-x-ctl-p-map "\C-m" 'mark-page)
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277 (define-key ctl-x-ctl-p-map "\C-s" 'search-pages)
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278 (define-key ctl-x-ctl-p-map "s" 'sort-pages-buffer)
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279 (define-key ctl-x-ctl-p-map "\C-l" 'set-page-delimiter)
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280 (define-key ctl-x-ctl-p-map "\C-d" 'pages-directory)
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281 (define-key ctl-x-ctl-p-map "d" 'pages-directory-for-addresses)
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282
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283
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284 ;;; Page movement function definitions
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285
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286 (defun next-page (&optional count)
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287 "Move to the next page bounded by the `page-delimiter' variable.
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288 With arg (prefix if interactive), move that many pages."
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289 (interactive "p")
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290 (or count (setq count 1))
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291 (widen)
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292 ;; Cannot use forward-page because of problems at page boundaries.
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293 (while (and (> count 0) (not (eobp)))
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294 (if (re-search-forward page-delimiter nil t)
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295 nil
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296 (goto-char (point-max)))
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297 (setq count (1- count)))
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298 ;; If COUNT is negative, we want to go back -COUNT + 1 page boundaries.
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299 ;; The first page boundary we reach is the top of the current page,
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300 ;; which doesn't count.
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301 (while (and (< count 1) (not (bobp)))
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302 (if (re-search-backward page-delimiter nil t)
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303 (goto-char (match-beginning 0))
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304 (goto-char (point-min)))
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305 (setq count (1+ count)))
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306 (narrow-to-page)
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307 (goto-char (point-min))
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308 (recenter 0))
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309
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310 (defun previous-page (&optional count)
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311 "Move to the previous page bounded by the `page-delimiter' variable.
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312 With arg (prefix if interactive), move that many pages."
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313 (interactive "p")
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314 (or count (setq count 1))
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315 (next-page (- count)))
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316
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317
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318 ;;; Adding and searching pages
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319
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320 (defun add-new-page (header-line)
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321 "Insert new page. Prompt for header line.
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322
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323 If point is in the pages directory buffer, insert the new page in the
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324 buffer associated with the directory.
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325
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326 Insert the new page just before current page if
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327 pages-directory-for-adding-new-page-before-current-page-p variable
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328 is non-nil. Else insert at exact location of point.
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329
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330 Narrow to new page if
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331 pages-directory-for-adding-page-narrowing-p variable
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332 is non-nil.
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333
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334 Page begins with a `^L' as the default page-delimiter.
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335 Use \\[set-page-delimiter] to change the page-delimiter.
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336 Point is left in the body of page."
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337 (interactive "sHeader line: ")
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338 (widen)
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339 ;; If in pages directory buffer
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340 (if (eq major-mode 'pages-directory-mode)
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341 (progn
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342 ;; Add new page before or after current page?
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343 (if pages-directory-for-adding-new-page-before-current-page-p
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344 (pages-directory-goto)
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345 (pages-directory-goto)
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346 (forward-page)
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347 (or (eobp) (forward-line -1)))))
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348 (widen)
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349 ;; Move point before current delimiter if desired.
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350 (and pages-directory-for-adding-new-page-before-current-page-p
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351 (if (re-search-backward page-delimiter nil t)
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352 (goto-char (match-beginning 0))
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353 ;; If going to beginning of file, insert a page-delimiter
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354 ;; before current first page.
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355 (goto-char (point-min))
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356 (insert
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357 (format "%s\n"
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358 ;; Remove leading `^' from page-delimiter string
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359 (if (eq '^ (car (read-from-string page-delimiter)))
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360 (substring page-delimiter 1))))
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361 (goto-char (point-min))))
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362 ;; Insert page delimiter at beginning of line.
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363 (if (not (looking-at "^.")) (forward-line 1))
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364 (insert (format "%s\n%s\n\n\n"
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365 (if (eq '^ (car (read-from-string page-delimiter)))
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366 (substring page-delimiter 1))
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367 header-line))
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368 (forward-line -1)
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369 (and pages-directory-for-adding-page-narrowing-p (narrow-to-page)))
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370
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371 (defvar pages-last-search nil
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372 "Value of last regexp searched for. Initially, nil.")
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373
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374 (defun search-pages (regexp)
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375 "Search for REGEXP, starting from point, and narrow to page it is in."
|
|
|
376 (interactive (list
|
|
|
377 (read-string
|
|
|
378 (format "Search for `%s' (end with RET): "
|
|
|
379 (or pages-last-search "regexp")))))
|
|
|
380 (if (equal regexp "")
|
|
|
381 (setq regexp pages-last-search)
|
|
|
382 (setq pages-last-search regexp))
|
|
|
383 (widen)
|
|
|
384 (re-search-forward regexp)
|
|
|
385 (narrow-to-page))
|
|
|
386
|
|
|
387
|
|
|
388 ;;; Sorting pages
|
|
|
389
|
|
|
390 (autoload 'sort-subr "sort" "Primary function for sorting." t nil)
|
|
|
391
|
|
|
392 (defun sort-pages-in-region (reverse beg end)
|
|
|
393 "Sort pages in region alphabetically. Prefix arg means reverse order.
|
|
|
394
|
|
|
395 Called from a program, there are three arguments:
|
|
|
396 REVERSE (non-nil means reverse order), BEG and END (region to sort)."
|
|
|
397
|
|
|
398 ;;; This sort function handles ends of pages differently than
|
|
|
399 ;;; `sort-pages' and works better with lists of addresses and similar
|
|
|
400 ;;; files.
|
|
|
401
|
|
|
402 (interactive "P\nr")
|
|
|
403 (save-restriction
|
|
|
404 (narrow-to-region beg end)
|
|
|
405 (goto-char (point-min))
|
|
|
406 ;;; `sort-subr' takes three arguments
|
|
|
407 (sort-subr reverse
|
|
|
408
|
|
|
409 ;; NEXTRECFUN is called with point at the end of the
|
|
|
410 ;; previous record. It moves point to the start of the
|
|
|
411 ;; next record.
|
|
|
412 (function (lambda ()
|
|
|
413 (re-search-forward page-delimiter nil t)
|
|
|
414 (skip-chars-forward " \t\n")
|
|
|
415 ))
|
|
|
416
|
|
|
417 ;; ENDRECFUN is is called with point within the record.
|
|
|
418 ;; It should move point to the end of the record.
|
|
|
419 (function (lambda ()
|
|
|
420 (if (re-search-forward
|
|
|
421 page-delimiter
|
|
|
422 nil
|
|
|
423 t)
|
|
|
424 (goto-char (match-beginning 0))
|
|
|
425 (goto-char (point-max))))))))
|
|
|
426
|
|
|
427 (defun sort-pages-buffer (&optional reverse)
|
|
|
428 "Sort pages alphabetically in buffer. Prefix arg means reverse order.
|
|
|
429 \(Non-nil arg if not interactive.\)"
|
|
|
430
|
|
|
431 (interactive "P")
|
|
|
432 (or reverse (setq reverse nil))
|
|
|
433 (widen)
|
|
|
434 (let ((beginning (point-min))
|
|
|
435 (end (point-max)))
|
|
|
436 (sort-pages-in-region reverse beginning end)))
|
|
|
437
|
|
|
438
|
|
|
439 ;;; Pages directory ancillary definitions
|
|
|
440
|
|
|
441 (defvar pages-directory-previous-regexp nil
|
|
|
442 "Value of previous regexp used by `pages-directory'.
|
|
|
443 \(This regular expression may be used to select only those pages that
|
|
|
444 contain matches to the regexp.\)")
|
|
|
445
|
|
|
446 (defvar pages-buffer nil
|
|
|
447 "The buffer for which the pages-directory function creates the directory.")
|
|
|
448
|
|
|
449 (defvar pages-directory-prefix "*Directory for:"
|
|
|
450 "Prefix of name of temporary buffer for pages-directory.")
|
|
|
451
|
|
|
452 (defvar pages-pos-list nil
|
|
|
453 "List containing the positions of the pages in the pages-buffer.")
|
|
|
454
|
|
|
455 (defvar pages-directory-map nil
|
|
|
456 "Keymap for the pages-directory-buffer.")
|
|
|
457
|
|
|
458 (if pages-directory-map
|
|
|
459 ()
|
|
|
460 (setq pages-directory-map (make-sparse-keymap))
|
|
|
461 (define-key pages-directory-map "\C-c\C-c"
|
|
|
462 'pages-directory-goto)
|
|
|
463 (define-key pages-directory-map "\C-c\C-p\C-a" 'add-new-page))
|
|
|
464
|
|
|
465 (defvar original-page-delimiter "^\f"
|
|
|
466 "Default page delimiter.")
|
|
|
467
|
|
|
468 (defun set-page-delimiter (regexp reset-p)
|
|
|
469 "Set buffer local value of page-delimiter to REGEXP.
|
|
|
470 Called interactively with a prefix argument, reset `page-delimiter' to
|
|
|
471 its original value.
|
|
|
472
|
|
|
473 In a program, non-nil second arg causes first arg to be ignored and
|
|
|
474 resets the page-delimiter to the original value."
|
|
|
475
|
|
|
476 (interactive
|
|
|
477 (if current-prefix-arg
|
|
|
478 (list original-page-delimiter "^\f")
|
|
|
479 (list (read-string "Set page-delimiter to regexp: " page-delimiter)
|
|
|
480 nil)))
|
|
|
481 (make-local-variable 'original-page-delimiter)
|
|
|
482 (make-local-variable 'page-delimiter)
|
|
|
483 (setq original-page-delimiter
|
|
|
484 (or original-page-delimiter page-delimiter))
|
|
|
485 (if (not reset-p)
|
|
|
486 (setq page-delimiter regexp)
|
|
|
487 (setq page-delimiter original-page-delimiter))
|
|
|
488 (if (interactive-p)
|
|
|
489 (message "The value of `page-delimiter' is now: %s" page-delimiter)))
|
|
|
490
|
|
|
491
|
|
|
492 ;;; Pages directory main definitions
|
|
|
493
|
|
|
494 (defun pages-directory
|
|
|
495 (pages-list-all-headers-p count-lines-p &optional regexp)
|
|
|
496 "Display a directory of the page headers in a temporary buffer.
|
|
|
497 A header is the first non-blank line after the page-delimiter.
|
|
|
498 \\[pages-directory-mode]
|
|
|
499 You may move point to one of the lines in the temporary buffer,
|
|
|
500 then use \\<pages-directory-goto> to go to the same line in the pages buffer.
|
|
|
501
|
|
|
502 In interactive use:
|
|
|
503
|
|
|
504 1. With no prefix arg, display all headers.
|
|
|
505
|
|
|
506 2. With prefix arg, display the headers of only those pages that
|
|
|
507 contain matches to a regular expression for which you are
|
|
|
508 prompted.
|
|
|
509
|
|
|
510 3. With numeric prefix arg, for every page, print the number of
|
|
|
511 lines within each page.
|
|
|
512
|
|
|
513 4. With negative numeric prefix arg, for only those pages that
|
|
|
514 match a regular expression, print the number of lines within
|
|
|
515 each page.
|
|
|
516
|
|
|
517 When called from a program, non-nil first arg means list all headers;
|
|
|
518 non-nil second arg means print numbers of lines in each page; if first
|
|
|
519 arg is nil, optional third arg is regular expression.
|
|
|
520
|
|
|
521 If the buffer is narrowed, the `pages-directory' command creates a
|
|
|
522 directory for only the accessible portion of the buffer."
|
|
|
523
|
|
|
524 (interactive
|
|
|
525 (cond ((not current-prefix-arg)
|
|
|
526 (list t nil nil))
|
|
|
527 ((listp current-prefix-arg)
|
|
|
528 (list nil
|
|
|
529 nil
|
|
|
530 (read-string
|
|
|
531 (format "Select according to `%s' (end with RET): "
|
|
|
532 (or pages-directory-previous-regexp "regexp")))))
|
|
|
533 ((> (prefix-numeric-value current-prefix-arg) 0)
|
|
|
534 (list t t nil))
|
|
|
535 ((< (prefix-numeric-value current-prefix-arg) 0)
|
|
|
536 (list nil
|
|
|
537 t
|
|
|
538 (read-string
|
|
|
539 (format "Select according to `%s' (end with RET): "
|
|
|
540 (or pages-directory-previous-regexp "regexp")))))))
|
|
|
541
|
|
|
542 (if (equal regexp "")
|
|
|
543 (setq regexp pages-directory-previous-regexp)
|
|
|
544 (setq pages-directory-previous-regexp regexp))
|
|
|
545
|
|
|
546 (if (interactive-p)
|
|
|
547 (message "Creating directory for: %s "
|
|
|
548 (buffer-name)))
|
|
|
549
|
|
|
550 (let ((target-buffer (current-buffer))
|
|
|
551 (pages-directory-buffer
|
|
|
552 (concat pages-directory-prefix " " (buffer-name)))
|
|
|
553 (linenum 1)
|
|
|
554 (pages-buffer-original-position (point))
|
|
|
555 (pages-buffer-original-page 0))
|
|
|
556
|
|
|
557 ;; `with-output-to-temp-buffer' binds the value of the variable
|
|
|
558 ;; `standard-output' to the buffer named as its first argument,
|
|
|
559 ;; but does not switch to that buffer.
|
|
|
560 (with-output-to-temp-buffer pages-directory-buffer
|
|
|
561 (save-excursion
|
|
|
562 (set-buffer standard-output)
|
|
|
563 (pages-directory-mode)
|
|
|
564 (insert
|
|
|
565 "==== Pages Directory: use `C-c C-c' to go to page under cursor. ====" ?\n)
|
|
|
566 (setq pages-buffer target-buffer)
|
|
|
567 (setq pages-pos-list nil))
|
|
|
568
|
|
|
569 (if pages-list-all-headers-p
|
|
|
570
|
|
|
571 ;; 1. If no prefix argument, list all headers
|
|
|
572 (save-excursion
|
|
|
573 (goto-char (point-min))
|
|
|
574
|
|
|
575 ;; (a) Point is at beginning of buffer; but the first
|
|
|
576 ;; page may not begin with a page-delimiter
|
|
|
577 (save-restriction
|
|
|
578 ;; If page delimiter is at beginning of buffer, skip it
|
|
|
579 (if (and (save-excursion
|
|
|
580 (re-search-forward page-delimiter nil t))
|
|
|
581 (= 1 (match-beginning 0)))
|
|
|
582 (goto-char (match-end 0)))
|
|
|
583 (narrow-to-page)
|
|
|
584 (pages-copy-header-and-position count-lines-p))
|
|
|
585
|
|
|
586 ;; (b) Search within pages buffer for next page-delimiter
|
|
|
587 (while (re-search-forward page-delimiter nil t)
|
|
|
588 (pages-copy-header-and-position count-lines-p)))
|
|
|
589
|
|
|
590 ;; 2. Else list headers whose pages match regexp.
|
|
|
591 (save-excursion
|
|
|
592 ;; REMOVED save-restriction AND widen FROM HERE
|
|
|
593 (goto-char (point-min))
|
|
|
594
|
|
|
595 ;; (a) Handle first page
|
|
|
596 (save-restriction
|
|
|
597 (narrow-to-page)
|
|
|
598 ;; search for selection regexp
|
|
|
599 (if (save-excursion (re-search-forward regexp nil t))
|
|
|
600 (pages-copy-header-and-position count-lines-p)))
|
|
|
601
|
|
|
602 ;; (b) Search for next page-delimiter
|
|
|
603 (while (re-search-forward page-delimiter nil t)
|
|
|
604 (save-restriction
|
|
|
605 (narrow-to-page)
|
|
|
606 ;; search for selection regexp
|
|
|
607 (if (save-excursion (re-search-forward regexp nil t))
|
|
|
608 (pages-copy-header-and-position count-lines-p)
|
|
|
609 )))))
|
|
|
610
|
|
|
611 (set-buffer standard-output)
|
|
|
612 ;; Put positions in increasing order to go with buffer.
|
|
|
613 (setq pages-pos-list (nreverse pages-pos-list))
|
|
|
614 (if (interactive-p)
|
|
|
615 (message "%d matching lines in: %s"
|
|
|
616 (length pages-pos-list) (buffer-name target-buffer))))
|
|
|
617 (pop-to-buffer pages-directory-buffer)
|
|
|
618 (sit-for 0) ; otherwise forward-line fails if N > window height.
|
|
|
619 (forward-line (if (= 0 pages-buffer-original-page)
|
|
|
620 1
|
|
|
621 pages-buffer-original-page))))
|
|
|
622
|
|
|
623 (defun pages-copy-header-and-position (count-lines-p)
|
|
|
624 "Copy page header and its position to the Pages Directory.
|
|
|
625 Only arg non-nil, count lines in page and insert before header.
|
|
|
626 Used by `pages-directory' function."
|
|
|
627
|
|
|
628 (let (position line-count)
|
|
|
629
|
|
|
630 (if count-lines-p
|
|
|
631 (save-excursion
|
|
|
632 (save-restriction
|
|
|
633 (narrow-to-page)
|
|
|
634 (setq line-count (count-lines (point-min) (point-max))))))
|
|
|
635
|
|
|
636 ;; Keep track of page for later cursor positioning
|
|
|
637 (if (<= (point) pages-buffer-original-position)
|
|
|
638 (setq pages-buffer-original-page
|
|
|
639 (1+ pages-buffer-original-page)))
|
|
|
640
|
|
|
641 (save-excursion
|
|
|
642 ;; go to first non-blank char after the page-delimiter
|
|
|
643 (skip-chars-forward " \t\n")
|
|
|
644 ;; set the marker here; this the place to which the
|
|
|
645 ;; `pages-directory-goto' command will go
|
|
|
646 (setq position (make-marker))
|
|
|
647 (set-marker position (point))
|
|
|
648 (let ((start (point))
|
|
|
649 (end (save-excursion (end-of-line) (point))))
|
|
|
650 ;; change to directory buffer
|
|
|
651 (set-buffer standard-output)
|
|
|
652 ;; record page position
|
|
|
653 (setq pages-pos-list (cons position pages-pos-list))
|
|
|
654 ;; insert page header
|
|
|
655 (insert-buffer-substring target-buffer start end))
|
|
|
656
|
|
|
657 (if count-lines-p
|
|
|
658 (save-excursion
|
|
|
659 (beginning-of-line)
|
|
|
660 (insert (format "%3d: " line-count))))
|
|
|
661
|
|
|
662 (terpri))
|
|
|
663 (end-of-line 1)))
|
|
|
664
|
|
|
665 (defun pages-directory-mode ()
|
|
|
666 "Mode for handling the pages-directory buffer.
|
|
|
667
|
|
|
668 Move point to one of the lines in this buffer, then use \\[pages-directory-goto] to go
|
|
|
669 to the same line in the pages buffer."
|
|
|
670
|
|
|
671 (kill-all-local-variables)
|
|
|
672 (use-local-map pages-directory-map)
|
|
|
673 (setq major-mode 'pages-directory-mode)
|
|
|
674 (setq mode-name "Pages-Directory")
|
|
|
675 (make-local-variable 'pages-buffer)
|
|
|
676 (make-local-variable 'pages-pos-list)
|
|
|
677 (make-local-variable 'pages-directory-buffer-narrowing-p))
|
|
|
678
|
|
|
679 (defun pages-directory-goto ()
|
|
|
680 "Go to the corresponding line in the pages buffer."
|
|
|
681
|
|
|
682 ;;; This function is mostly a copy of `occur-mode-goto-occurrence'
|
|
|
683
|
|
|
684 (interactive)
|
|
|
685 (if (or (not pages-buffer)
|
|
|
686 (not (buffer-name pages-buffer)))
|
|
|
687 (progn
|
|
|
688 (setq pages-buffer nil
|
|
|
689 pages-pos-list nil)
|
|
|
690 (error "Buffer in which pages were found is deleted.")))
|
|
|
691 (beginning-of-line)
|
|
|
692 (let* ((pages-number (1- (count-lines (point-min) (point))))
|
|
|
693 (pos (nth pages-number pages-pos-list))
|
|
|
694 (end-of-directory-p (eobp))
|
|
|
695 (narrowing-p pages-directory-buffer-narrowing-p))
|
|
|
696 (pop-to-buffer pages-buffer)
|
|
|
697 (widen)
|
|
|
698 (if end-of-directory-p
|
|
|
699 (goto-char (point-max))
|
|
|
700 (goto-char (marker-position pos)))
|
|
|
701 (if narrowing-p (narrow-to-page))))
|
|
|
702
|
|
|
703
|
|
|
704 ;;; The `pages-directory-for-addresses' function and ancillary code
|
|
|
705
|
|
|
706 (defun pages-directory-for-addresses (&optional filename)
|
|
|
707 "Find addresses file and display its directory.
|
|
|
708 By default, create and display directory of `pages-addresses-file-name'.
|
|
|
709 Optional argument is FILENAME. In interactive use, with prefix
|
|
|
710 argument, prompt for file name and provide completion.
|
|
|
711
|
|
|
712 Move point to one of the lines in the displayed directory,
|
|
|
713 then use \\[pages-directory-goto] to go to the same line
|
|
|
714 in the addresses buffer.
|
|
|
715
|
|
|
716 If pages-directory-for-addresses-goto-narrowing-p is non-nil,
|
|
|
717 `pages-directory-goto' narrows addresses buffer to entry.
|
|
|
718
|
|
|
719 If pages-directory-for-addresses-buffer-keep-windows-p is nil,
|
|
|
720 this command deletes other windows when it displays the addresses
|
|
|
721 directory."
|
|
|
722
|
|
|
723 (interactive
|
|
|
724 (list (if current-prefix-arg
|
|
|
725 (read-file-name "Filename: " pages-addresses-file-name))))
|
|
|
726
|
|
|
727 (if (interactive-p)
|
|
|
728 (message "Creating directory for: %s "
|
|
|
729 (or filename pages-addresses-file-name)))
|
|
|
730 (if (file-exists-p (or filename pages-addresses-file-name))
|
|
|
731 (progn
|
|
|
732 (set-buffer
|
|
|
733 (find-file-noselect
|
|
|
734 (expand-file-name
|
|
|
735 (or filename pages-addresses-file-name))))
|
|
|
736 (widen)
|
|
|
737 (pages-directory t nil nil)
|
|
|
738 (pages-directory-address-mode)
|
|
|
739 (setq pages-directory-buffer-narrowing-p
|
|
|
740 pages-directory-for-addresses-goto-narrowing-p)
|
|
|
741 (or pages-directory-for-addresses-buffer-keep-windows-p
|
|
|
742 (delete-other-windows))
|
|
|
743 (save-excursion
|
|
|
744 (goto-char (point-min))
|
|
|
745 (delete-region (point) (save-excursion (end-of-line) (point)))
|
|
|
746 (insert
|
|
|
747 "=== Address List Directory: use `C-c C-c' to go to page under cursor. ===")
|
|
|
748 (set-buffer-modified-p nil)
|
|
|
749 ))
|
|
|
750 (error "No addresses file found!")))
|
|
|
751
|
|
|
752 (defun pages-directory-address-mode ()
|
|
|
753 "Mode for handling the Addresses Directory buffer.
|
|
|
754
|
|
|
755 Move point to one of the lines in this buffer,
|
|
|
756 then use \\[pages-directory-goto] to go
|
|
|
757 to the same line in the pages buffer."
|
|
|
758
|
|
|
759 (use-local-map pages-directory-map)
|
|
|
760 (setq major-mode 'pages-directory-address-mode)
|
|
|
761 (setq mode-name "Addresses Directory")
|
|
|
762 (make-local-variable 'pages-buffer)
|
|
|
763 (make-local-variable 'pages-pos-list)
|
|
|
764 (make-local-variable 'pages-directory-buffer-narrowing-p))
|
|
|
765
|
|
|
766
|
|
|
767 ;;; Place `provide' at end of file.
|
|
|
768 (provide 'page-ext)
|
|
|
769
|
|
|
770 ;;;;;;;;;;;;;;;; end of page-ext.el ;;;;;;;;;;;;;;;;
|
|
|
771
|
