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428
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1 ;;; gutter-items.el --- Gutter content for XEmacs.
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2
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3 ;; Copyright (C) 1999 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1999 Andy Piper.
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: frames, extensions, internal, dumped
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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 it
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12 ;; 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, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; 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 Xmacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;; Some of this is taken from the buffer-menu stuff in menubar-items.el
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27 ;; and the custom specs in toolbar.el.
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28
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29 (defgroup gutter nil
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30 "Input from the gutters."
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31 :group 'environment)
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32
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33 (defcustom gutter-visible-p
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34 (specifier-instance default-gutter-visible-p)
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35 "Whether the default gutter is globally visible. This option can be
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36 customized through the options menu."
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37 :group 'display
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38 :type 'boolean
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39 :set #'(lambda (var val)
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40 (set-specifier default-gutter-visible-p val)
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41 (setq gutter-visible-p val)))
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42
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43 (defcustom default-gutter-position
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44 (default-gutter-position)
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45 "The location of the default gutter. It can be 'top, 'bottom, 'left or
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46 'right. This option can be customized through the options menu."
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47 :group 'display
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48 :type '(choice (const :tag "top" 'top)
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49 (const :tag "bottom" 'bottom)
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50 (const :tag "left" 'left)
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51 (const :tag "right" 'right))
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52 :set #'(lambda (var val)
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53 (set-default-gutter-position val)
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54 (setq default-gutter-position val)))
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55
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56 ;;; The Buffers tab
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57
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58 (defgroup buffers-tab nil
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59 "Customization of `Buffers' tab."
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60 :group 'gutter)
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61
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62 (defvar gutter-buffers-tab nil
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63 "A tab widget in the gutter for displaying buffers.
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64 Do not set this. Use `glyph-image-instance' and
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65 `set-image-instance-property' to change the properties of the tab.")
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66
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67 (defcustom buffers-tab-max-size 6
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68 "*Maximum number of entries which may appear on the \"Buffers\" tab.
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69 If this is 10, then only the ten most-recently-selected buffers will be
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70 shown. If this is nil, then all buffers will be shown. Setting this to
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71 a large number or nil will slow down tab responsiveness."
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72 :type '(choice (const :tag "Show all" nil)
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73 (integer 6))
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74 :group 'buffers-tab)
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75
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76 (defcustom buffers-tab-switch-to-buffer-function 'buffers-tab-switch-to-buffer
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77 "*The function to call to select a buffer from the buffers tab.
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78 `switch-to-buffer' is a good choice, as is `pop-to-buffer'."
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79 :type '(radio (function-item switch-to-buffer)
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80 (function-item pop-to-buffer)
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81 (function :tag "Other"))
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82 :group 'buffers-tab)
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83
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84 (defcustom buffers-tab-omit-function 'buffers-menu-omit-invisible-buffers
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85 "*If non-nil, a function specifying the buffers to omit from the buffers tab.
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86 This is passed a buffer and should return non-nil if the buffer should be
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87 omitted. The default value `buffers-tab-omit-invisible-buffers' omits
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88 buffers that are normally considered \"invisible\" (those whose name
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89 begins with a space)."
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90 :type '(choice (const :tag "None" nil)
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91 function)
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92 :group 'buffers-tab)
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93
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94 (defcustom buffers-tab-selection-function 'select-buffers-tab-buffers-by-mode
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95 "*If non-nil, a function specifying the buffers to select from the
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96 buffers tab. This is passed two buffers and should return non-nil if
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97 the second buffer should be selected. The default value
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98 `select-buffers-tab-buffers-by-mode' groups buffers by major mode and
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99 by `buffers-tab-grouping-regexp'."
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100
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101 :type '(choice (const :tag "None" nil)
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102 function)
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103 :group 'buffers-tab)
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104
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105 (defcustom buffers-tab-face 'default
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106 "*Face to use for displaying the buffers tab."
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107 :type 'face
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108 :group 'buffers-tab)
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109
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110 (defcustom buffers-tab-grouping-regexp
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111 '("^\\(gnus-\\|message-mode\\|mime/viewer-mode\\)"
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112 "^\\(emacs-lisp-\\|lisp-\\)")
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113 "*If non-nil, a list of regular expressions for buffer grouping.
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114 Each regular expression is applied to the current major-mode symbol
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115 name and mode-name, if it matches then any other buffers that match
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116 the same regular expression be added to the current group."
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117 :type '(choice (const :tag "None" nil)
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118 sexp)
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119 :group 'buffers-tab)
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120
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121 (defcustom buffers-tab-format-buffer-line-function 'format-buffers-tab-line
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122 "*The function to call to return a string to represent a buffer in the
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123 buffers tab. The function is passed a buffer and should return a
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124 string. The default value `format-buffers-tab-line' just returns the
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125 name of the buffer, optionally truncated to
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126 `buffers-tab-max-buffer-line-length'. Also check out
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127 `slow-format-buffers-menu-line' which returns a whole bunch of info
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128 about a buffer."
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129 :type 'function
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130 :group 'buffers-tab)
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131
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132 (defvar buffers-tab-default-buffer-line-length
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133 (make-specifier-and-init 'generic '((global ((default) . 25))) t)
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134 "*Maximum length of text which may appear in a \"Buffers\" tab.
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135 This is a specifier, use set-specifier to modify it.")
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136
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137 (defcustom buffers-tab-max-buffer-line-length
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138 (specifier-instance buffers-tab-default-buffer-line-length)
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139 "*Maximum length of text which may appear in a \"Buffers\" tab.
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140 Buffer names over this length will be truncated with elipses.
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141 If this is 0, then the full buffer name will be shown."
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142 :type '(choice (const :tag "Show all" 0)
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143 (integer 25))
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144 :group 'buffers-tab
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145 :set #'(lambda (var val)
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146 (set-specifier buffers-tab-default-buffer-line-length val)
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147 (setq buffers-tab-max-buffer-line-length val)))
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148
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149 (defun buffers-tab-switch-to-buffer (buffer)
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150 "For use as a value for `buffers-tab-switch-to-buffer-function'."
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151 (unless (eq (window-buffer) buffer)
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152 (if (> (length (windows-of-buffer buffer)) 0)
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153 (select-window (car (windows-of-buffer buffer)))
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154 (switch-to-buffer buffer t))))
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155
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156 (defun select-buffers-tab-buffers-by-mode (buf1 buf2)
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157 "For use as a value of `buffers-tab-selection-function'.
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158 This selects buffers by major mode `buffers-tab-grouping-regexp'."
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159 (let ((mode1 (symbol-name (symbol-value-in-buffer 'major-mode buf1)))
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160 (mode2 (symbol-name (symbol-value-in-buffer 'major-mode buf2)))
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161 (modenm1 (symbol-value-in-buffer 'mode-name buf1))
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162 (modenm2 (symbol-value-in-buffer 'mode-name buf2)))
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163 (cond ((or (eq mode1 mode2)
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164 (eq modenm1 modenm2)
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165 (and (string-match "^[^-]+-" mode1)
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166 (string-match
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167 (concat "^" (regexp-quote
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168 (substring mode1 0 (match-end 0))))
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169 mode2))
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170 (and buffers-tab-grouping-regexp
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171 (find-if #'(lambda (x)
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172 (or
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173 (and (string-match x mode1)
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174 (string-match x mode2))
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175 (and (string-match x modenm1)
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176 (string-match x modenm2))))
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177 buffers-tab-grouping-regexp)))
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178 t)
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179 (t nil))))
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180
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181 (defun format-buffers-tab-line (buffer)
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182 "For use as a value of `buffers-tab-format-buffer-line-function'.
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183 This just returns the buffer's name, optionally truncated."
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184 (let ((len (specifier-instance buffers-tab-default-buffer-line-length)))
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185 (if (and (> len 0)
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186 (> (length (buffer-name buffer)) len))
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187 (concat (substring (buffer-name buffer)
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188 0 (- len 3)) "...")
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189 (buffer-name buffer))))
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190
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191 (defsubst build-buffers-tab-internal (buffers)
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192 (let (line)
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193 (mapcar
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194 #'(lambda (buffer)
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195 (setq line (funcall buffers-tab-format-buffer-line-function
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196 buffer))
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197 (vector line (list buffers-tab-switch-to-buffer-function
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198 (buffer-name buffer))))
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199 buffers)))
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200
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201 (defun buffers-tab-items (&optional in-deletion frame)
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202 "This is the tab filter for the top-level buffers \"Buffers\" tab.
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203 It dynamically creates a list of buffers to use as the contents of the tab.
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204 Only the most-recently-used few buffers will be listed on the tab, for
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205 efficiency reasons. You can control how many buffers will be shown by
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206 setting `buffers-tab-max-size'. You can control the text of the tab
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207 items by redefining the function `format-buffers-menu-line'."
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208 (let* ((buffers (delete-if buffers-tab-omit-function (buffer-list frame)))
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209 (first-buf (car buffers)))
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210 ;; if we're in deletion ignore the current buffer
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211 (when in-deletion
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212 (setq buffers (delq (current-buffer) buffers))
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213 (setq first-buf (car buffers)))
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214 ;; group buffers by mode
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215 (when buffers-tab-selection-function
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216 (delete-if-not #'(lambda (buf)
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217 (funcall buffers-tab-selection-function
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218 first-buf buf)) buffers))
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219 (and (integerp buffers-tab-max-size)
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220 (> buffers-tab-max-size 1)
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221 (> (length buffers) buffers-tab-max-size)
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222 ;; shorten list of buffers
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223 (setcdr (nthcdr buffers-tab-max-size buffers) nil))
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224 (setq buffers (build-buffers-tab-internal buffers))
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225 buffers))
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226
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227 (defun add-tab-to-gutter ()
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228 "Put a tab control in the gutter area to hold the most recent buffers."
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229 (let ((gutter-string ""))
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230 (set-extent-begin-glyph
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231 (make-extent 0 0 gutter-string)
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232 (setq gutter-buffers-tab
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233 (make-glyph
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234 (vector 'tab-control :descriptor "Buffers" :face buffers-tab-face
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235 :properties (list :items (buffers-tab-items))))))
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236 ;; This looks better than a 3d border
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237 (mapcar '(lambda (x)
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238 (when (valid-image-instantiator-format-p 'tab-control x)
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239 (set-specifier default-gutter-border-width 0 'global x)
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240 (set-specifier default-gutter gutter-string 'global x)))
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241 (console-type-list))))
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242
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243 (defun update-tab-in-gutter (&optional frame-or-buffer)
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244 "Update the tab control in the gutter area."
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245 (let ((locale (if (framep frame-or-buffer) frame-or-buffer)))
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246 (when (specifier-instance default-gutter-visible-p locale)
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247 (unless gutter-buffers-tab
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248 (add-tab-to-gutter))
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249 (when (valid-image-instantiator-format-p 'tab-control)
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250 (let ((inst (glyph-image-instance
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251 gutter-buffers-tab
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252 (when (framep frame-or-buffer)
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253 (last-nonminibuf-window frame-or-buffer)))))
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254 (set-image-instance-property inst :items
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255 (buffers-tab-items
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256 nil locale))
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257 (resize-subwindow inst (gutter-pixel-width) nil))
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258 ))))
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259
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260 (defun remove-buffer-from-gutter-tab ()
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261 "Remove the current buffer from the tab control in the gutter area."
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262 (when (and (valid-image-instantiator-format-p 'tab-control)
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263 (specifier-instance default-gutter-visible-p))
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264 (let ((inst (glyph-image-instance gutter-buffers-tab))
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265 (buffers (buffers-tab-items t)))
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266 (unless buffers
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267 (setq buffers (build-buffers-tab-internal
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268 (list
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269 (get-buffer-create "*scratch*")))))
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270 (set-image-instance-property inst :items buffers)
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271 (resize-subwindow inst (gutter-pixel-width) nil)
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272 )))
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273
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274 (add-hook 'kill-buffer-hook 'remove-buffer-from-gutter-tab)
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275 (add-hook 'create-frame-hook 'update-tab-in-gutter)
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276 (add-hook 'record-buffer-hook 'update-tab-in-gutter)
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277
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278 ;;
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279 ;; progress display
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280 ;; ripped off from message display
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281 ;;
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282 (defvar progress-stack nil
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283 "An alist of label/string pairs representing active progress gauges.
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284 The first element in the list is currently displayed in the gutter area.
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285 Do not modify this directly--use the `progress' or
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286 `display-progress'/`clear-progress' functions.")
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287
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288 (defvar progress-glyph-height 32
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289 "Height of the gutter area for progress messages.")
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290
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291 (defvar progress-stop-callback 'progress-quit-function
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292 "Function to call to stop the progress operation.")
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293
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294 (defun progress-quit-function ()
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295 "Default function to call for the stop button in a progress gauge.
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296 This just removes the progress gauge and calls quit."
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297 (interactive)
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298 (clear-progress)
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299 (keyboard-quit))
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300
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301 ;; private variables
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302 (defvar progress-gauge-glyph
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303 (make-glyph
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304 (vector 'progress-gauge
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305 :pixel-height (- progress-glyph-height 8)
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306 :pixel-width 250
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307 :descriptor "Progress")))
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308
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309 (defvar progress-text-glyph
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310 (make-glyph [string :data ""]))
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311
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312 (defvar progress-layout-glyph
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313 (make-glyph
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314 (vector
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315 'layout :orientation 'vertical :justify 'left
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316 :items (list
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317 progress-text-glyph
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318 (make-glyph
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319 (vector
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320 'layout :pixel-height progress-glyph-height
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321 :orientation 'horizontal
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322 :items (list
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323 progress-gauge-glyph
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324 (vector
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325 'button :pixel-height (- progress-glyph-height 8)
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326 :descriptor " Stop "
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327 :callback '(funcall progress-stop-callback)))))))))
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328
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329 (defvar progress-abort-glyph
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330 (make-glyph
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331 (vector 'layout :orientation 'vertical :justify 'left
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332 :items (list progress-text-glyph
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333 (make-glyph
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334 (vector 'layout
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335 :pixel-height progress-glyph-height
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336 :orientation 'horizontal))))))
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337
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338 (defvar progress-extent-text "")
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339 (defvar progress-extent nil)
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340
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341 (defun progress-displayed-p (&optional return-string frame)
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342 "Return a non-nil value if a progress gauge is presently displayed in the
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343 gutter area. If optional argument RETURN-STRING is non-nil,
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344 return a string containing the message, otherwise just return t."
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345 (let ((buffer (get-buffer-create " *Gutter Area*")))
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346 (and (< (point-min buffer) (point-max buffer))
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347 (if return-string
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348 (buffer-substring nil nil buffer)
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349 t))))
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350
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351 ;;; Returns the string which remains in the echo area, or nil if none.
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352 ;;; If label is nil, the whole message stack is cleared.
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353 (defun clear-progress (&optional label frame no-restore)
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354 "Remove any progress gauge with the given LABEL from the progress gauge-stack,
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355 erasing it from the gutter area if it's currently displayed there.
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356 If a message remains at the head of the progress-stack and NO-RESTORE
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357 is nil, it will be displayed. The string which remains in the gutter
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358 area will be returned, or nil if the progress-stack is now empty.
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359 If LABEL is nil, the entire progress-stack is cleared.
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360
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361 Unless you need the return value or you need to specify a label,
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362 you should just use (progress nil)."
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363 (or frame (setq frame (selected-frame)))
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364 (remove-progress label frame)
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365 (let ((inhibit-read-only t)
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366 (zmacs-region-stays zmacs-region-stays)) ; preserve from change
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367 (erase-buffer " *Echo Area*")
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368 (erase-buffer (get-buffer-create " *Gutter Area*")))
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369 (if no-restore
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370 nil ; just preparing to put another msg up
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371 (if progress-stack
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372 (let ((oldmsg (cdr (car progress-stack))))
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373 (raw-append-progress oldmsg frame)
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374 oldmsg)
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375 ;; nothing to display so get rid of the gauge
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376 (set-specifier bottom-gutter-border-width 0 frame)
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377 (set-specifier bottom-gutter-visible-p nil frame))))
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378
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379 (defun remove-progress (&optional label frame)
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380 ;; If label is nil, we want to remove all matching progress gauges.
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381 (while (and progress-stack
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382 (or (null label) ; null label means clear whole stack
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383 (eq label (car (car progress-stack)))))
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384 (setq progress-stack (cdr progress-stack)))
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385 (let ((s progress-stack))
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386 (while (cdr s)
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387 (let ((msg (car (cdr s))))
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388 (if (eq label (car msg))
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389 (progn
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390 (setcdr s (cdr (cdr s))))
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391 (setq s (cdr s)))))))
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392
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393 (defun append-progress (label message &optional value frame)
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394 (or frame (setq frame (selected-frame)))
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395 ;; Add a new entry to the message-stack, or modify an existing one
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396 (let* ((top (car progress-stack))
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397 (tmsg (cdr top)))
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398 (if (eq label (car top))
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399 (progn
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400 (setcdr top message)
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401 (if (eq tmsg message)
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402 (set-image-instance-property
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403 (glyph-image-instance progress-gauge-glyph)
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404 :percent value)
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405 (raw-append-progress message value frame))
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406 (redisplay-gutter-area)
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407 (when (input-pending-p)
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408 (dispatch-event (next-command-event))))
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409 (push (cons label message) progress-stack)
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410 (raw-append-progress message value frame))
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411 (when (eq value 100)
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412 (sit-for 0.5 nil)
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413 (clear-progress label))))
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414
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415 (defun abort-progress (label message &optional frame)
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416 (or frame (setq frame (selected-frame)))
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417 ;; Add a new entry to the message-stack, or modify an existing one
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418 (let* ((top (car progress-stack))
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419 (inhibit-read-only t)
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420 (zmacs-region-stays zmacs-region-stays))
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421 (if (eq label (car top))
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422 (setcdr top message)
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423 (push (cons label message) progress-stack))
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424 (unless (equal message "")
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425 (insert-string message (get-buffer-create " *Gutter Area*"))
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426 ;; Do what the device is able to cope with.
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427 (if (not (valid-image-instantiator-format-p 'progress-gauge frame))
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428 (progn
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429 (insert-string message " *Echo Area*")
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430 (if (not executing-kbd-macro)
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431 (redisplay-echo-area)))
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432 ;; do some funky display here.
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433 (unless progress-extent
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434 (setq progress-extent (make-extent 0 0 progress-extent-text)))
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435 (let ((bglyph (extent-begin-glyph progress-extent)))
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436 (set-extent-begin-glyph progress-extent progress-abort-glyph)
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437 ;; fixup the gutter specifiers
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438 (set-specifier bottom-gutter progress-extent-text frame)
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439 (set-specifier bottom-gutter-border-width 2 frame)
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440 (set-image-instance-property
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441 (glyph-image-instance progress-text-glyph) :data message)
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442 (set-specifier bottom-gutter-height 'autodetect frame)
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443 (set-specifier bottom-gutter-visible-p t frame)
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444 ;; we have to do this so redisplay is up-to-date and so
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445 ;; redisplay-gutter-area performs optimally.
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446 (redisplay-gutter-area)
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447 (sit-for 0.5 nil)
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448 (clear-progress label)
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449 (set-extent-begin-glyph progress-extent bglyph)
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450 )))))
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451
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452 (defun raw-append-progress (message &optional value frame)
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453 (unless (equal message "")
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454 (let ((inhibit-read-only t)
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455 (zmacs-region-stays zmacs-region-stays)
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456 (val (or value 0))) ; preserve from change
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457 (insert-string message (get-buffer-create " *Gutter Area*"))
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458 ;; Do what the device is able to cope with.
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459 (if (not (valid-image-instantiator-format-p 'progress-gauge frame))
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460 (progn
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461 (insert-string
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462 (concat message (if (eq val 100) "done.")
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463 (make-string (/ val 5) ?.))
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464 " *Echo Area*")
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465 (if (not executing-kbd-macro)
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466 (redisplay-echo-area)))
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467 ;; do some funky display here.
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468 (unless progress-extent
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469 (setq progress-extent (make-extent 0 0 progress-extent-text))
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470 (set-extent-begin-glyph progress-extent progress-layout-glyph))
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471 ;; fixup the gutter specifiers
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472 (set-specifier bottom-gutter progress-extent-text frame)
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473 (set-specifier bottom-gutter-border-width 2 frame)
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474 (set-image-instance-property
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475 (glyph-image-instance progress-gauge-glyph) :percent val)
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476 (set-image-instance-property
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477 (glyph-image-instance progress-text-glyph) :data message)
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478 (if (and (eq (specifier-instance bottom-gutter-height frame)
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479 'autodetect)
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480 (specifier-instance bottom-gutter-visible-p frame))
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481 (progn
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482 ;; if the gauge is already visible then just draw the gutter
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483 ;; checking for user events
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484 (redisplay-gutter-area)
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485 (when (input-pending-p)
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486 (dispatch-event (next-command-event))))
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487 ;; otherwise make the gutter visible and redraw the frame
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488 (set-specifier bottom-gutter-height 'autodetect frame)
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489 (set-specifier bottom-gutter-visible-p t frame)
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490 ;; we have to do this so redisplay is up-to-date and so
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491 ;; redisplay-gutter-area performs optimally.
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492 (redisplay-frame)
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493 )))))
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494
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495 (defun display-progress (label message &optional value frame)
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496 "Display a progress gauge and message in the bottom gutter area.
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497 First argument LABEL is an identifier for this message. MESSAGE is
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498 the string to display. Use `clear-progress' to remove a labelled
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499 message."
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500 (clear-progress label frame t)
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501 (if (eq value 'abort)
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502 (abort-progress label message frame)
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503 (append-progress label message value frame)))
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504
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505 (defun current-progress (&optional frame)
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506 "Return the current progress gauge in the gutter area, or nil.
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507 The FRAME argument is currently unused."
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|
508 (cdr (car progress-stack)))
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509
|
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510 ;;; may eventually be frame-dependent
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511 (defun current-progress-label (&optional frame)
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|
512 (car (car progress-stack)))
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513
|
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514 (defun progress (fmt &optional value &rest args)
|
|
|
515 "Print a progress gauge and message in the bottom gutter area of the frame.
|
|
|
516 The arguments are the same as to `format'.
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|
|
517
|
|
|
518 If the only argument is nil, clear any existing progress gauge."
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|
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519 (if (and (null fmt) (null args))
|
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|
520 (prog1 nil
|
|
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521 (clear-progress nil))
|
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522 (let ((str (apply 'format fmt args)))
|
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|
523 (display-progress 'progress str value)
|
|
|
524 str)))
|
|
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525
|
|
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526 (defun lprogress (label fmt &optional value &rest args)
|
|
|
527 "Print a progress gauge and message in the bottom gutter area of the frame.
|
|
|
528 First argument LABEL is an identifier for this progress gauge. The rest of the
|
|
|
529 arguments are the same as to `format'."
|
|
|
530 (if (and (null fmt) (null args))
|
|
|
531 (prog1 nil
|
|
|
532 (clear-progress label nil))
|
|
|
533 (let ((str (apply 'format fmt args)))
|
|
|
534 (display-progress label str value)
|
|
|
535 str)))
|
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536
|
|
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537 (provide 'gutter-items)
|
|
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538 ;;; gutter-items.el ends here.
|
