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1 ;;!emacs
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2 ;;
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3 ;; FILE: hui-em19-b.el
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4 ;; SUMMARY: GNU Emacs V19 button highlighting and flashing support.
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5 ;; USAGE: GNU Emacs V19 Lisp Library
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6 ;; KEYWORDS: faces, hypermedia
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7 ;;
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8 ;; AUTHOR: Bob Weiner
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9 ;; ORG: InfoDock Associates
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10 ;;
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11 ;; ORIG-DATE: 21-Aug-92
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12 ;; LAST-MOD: 26-Feb-97 at 01:58:45 by Bob Weiner
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13 ;;
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14 ;; This file is part of Hyperbole.
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15 ;; It is for use with GNU Emacs V19.
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16 ;; Available for use and distribution under the same terms as GNU Emacs.
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17 ;;
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18 ;; Copyright (C) 1992-1995, Free Software Foundation, Inc.
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19 ;; Developed with support from Motorola Inc.
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20 ;;
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21 ;; DESCRIPTION:
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22 ;;
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23 ;; This is truly prototype code.
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24 ;;
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25 ;; Can't use read-only buttons here because then outline-mode
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26 ;; becomes unusable.
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27 ;;
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28 ;; DESCRIP-END.
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29
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30 (if (and hyperb:emacs19-p (or noninteractive hyperb:window-system))
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31 nil
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32 (error "(hui-em19-b.el): Load only when running GNU Emacs V19 under a window system."))
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33
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34 ;;; ************************************************************************
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35 ;;; Other required Elisp libraries
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36 ;;; ************************************************************************
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37
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38 (require 'hvar)
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39 (require 'hbut)
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40
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41 (defun hproperty:background ()
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42 "Returns default background color for current frame."
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43 (or (face-background (make-face 'default))
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44 (cdr (assq 'background-color (frame-parameters)))
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45 "White"))
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46
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47 (defun hproperty:foreground ()
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48 "Returns default foreground color for current frame."
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49 (or (face-foreground (make-face 'default))
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50 (cdr (assq 'foreground-color (frame-parameters)))
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51 "Black"))
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52
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53 ;;; ************************************************************************
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54 ;;; Public variables
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55 ;;; ************************************************************************
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56
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57 (defvar hproperty:but-emphasize-p nil
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58 "*Non-nil means visually emphasize that button under mouse cursor is selectable.")
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59
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60 (defvar hproperty:but-flash-time 1000
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61 "*Machine specific value for empty loop counter, Emacs 19 button flash delay.")
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62
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63 (defvar hproperty:item-highlight-color (hproperty:foreground)
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64 "Color with which to highlight list/menu selections.
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65 Call (hproperty:set-item-highlight <color>) to change value.")
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66
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67 ;;; ************************************************************************
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68 ;;; Public functions
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69 ;;; ************************************************************************
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70
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71 ;; Support NEXTSTEP and X window systems.
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72 (and (not (fboundp 'display-color-p))
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73 (fboundp 'x-display-color-p)
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74 (fset 'display-color-p 'x-display-color-p))
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75
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76 (defun hproperty:but-add (start end face)
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77 "Add between START and END a button using FACE in current buffer.
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78 If `hproperty:but-emphasize-p' is non-nil when this is called, emphasize that
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79 button is selectable whenever the mouse cursor moves over it."
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80 (let ((but (make-overlay start end)))
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81 (overlay-put but 'face face)
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82 (if hproperty:but-emphasize-p (overlay-put but 'mouse-face 'highlight))))
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83
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84 (defun hproperty:but-color ()
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85 "Return current color of buffer's buttons."
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86 (if hproperty:color-ptr
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87 (car hproperty:color-ptr)
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88 (hproperty:foreground)))
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89
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90 (defun hproperty:but-clear ()
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91 "Delete all Hyperbole buttons from current buffer."
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92 (interactive)
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93 (let ((start (point-min)))
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94 (while (< start (point-max))
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95 (mapcar (function (lambda (props)
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96 (if (eq (overlay-get props 'face) hproperty:but-face)
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97 (delete-overlay props))))
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98 (overlays-at start))
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99 (setq start (next-overlay-change start)))))
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100
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101 (defun hproperty:but-create (&optional start-delim end-delim regexp-match)
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102 "Highlight all hyper-buttons in buffer.
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103 Will use optional strings START-DELIM and END-DELIM instead of default values.
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104 If END-DELIM is a symbol, e.g. t, then START-DELIM is taken as a regular
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105 expression which matches an entire button string.
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106 If REGEXP-MATCH is non-nil, only buttons matching this argument are
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107 highlighted.
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108
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109 If `hproperty:but-emphasize-p' is non-nil when this is called, emphasize that
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110 button is selectable whenever the mouse cursor moves over it."
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111 (interactive)
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112 (hproperty:but-clear)
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113 (hproperty:but-create-all start-delim end-delim regexp-match))
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114
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115 (defun hproperty:but-create-all (&optional start-delim end-delim regexp-match)
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116 "Mark all hyper-buttons in buffer for later highlighting.
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117 Will use optional strings START-DELIM and END-DELIM instead of default values.
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118 If END-DELIM is a symbol, e.g. t, then START-DELIM is taken as a regular
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119 expression which matches an entire button string.
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120 If REGEXP-MATCH is non-nil, only buttons matching this argument are
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121 highlighted."
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122 (ebut:map (function (lambda (lbl start end)
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123 (hproperty:but-add start end hproperty:but-face)))
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124 start-delim end-delim regexp-match 'include-delims))
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125
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126 (defun hproperty:but-delete (&optional pos)
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127 (let ((but (hproperty:but-get pos)))
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128 (if but (delete-overlay but))))
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129
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130 ;;; ************************************************************************
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131 ;;; Private functions
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132 ;;; ************************************************************************
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133
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134 (defun hproperty:but-get (&optional pos)
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135 (car (delq nil
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136 (mapcar (function (lambda (props)
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137 (if (memq (overlay-get props 'face)
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138 (list hproperty:but-face
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139 hproperty:flash-face))
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140 props)))
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141 (overlays-at (or pos (point)))))))
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142
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143 (defmacro hproperty:list-cycle (list-ptr list)
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144 "Move LIST-PTR to next element in LIST or when at end to first element."
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145 (` (or (and (, list-ptr)
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146 (setq (, list-ptr) (cdr (, list-ptr))))
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147 (setq (, list-ptr) (, list)))))
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148
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149 ;;; ************************************************************************
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150 ;;; Private variables
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151 ;;; ************************************************************************
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152
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153 (defconst hproperty:color-list
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154 (if (eq window-system 'x)
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155 '( "red" "blue" "paleturquoise4" "mediumpurple2"
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156 "lightskyblue3" "springgreen2" "salmon" "yellowgreen" "darkorchid2"
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157 "aquamarine4" "slateblue4" "slateblue1" "olivedrab1" "goldenrod4"
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158 "goldenrod3" "cadetblue2" "burlywood1" "slategrey" "mistyrose"
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159 "limegreen" "lightcyan" "goldenrod" "gainsboro" "skyblue1" "honeydew"
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160 "yellow2" "tomato3" "skyblue" "purple4" "orange3" "bisque3" "bisque2"
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161 "grey34" "gray99" "gray63" "gray44" "gray37" "gray33" "gray26" "azure1"
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162 "snow4" "peru" "red" "lightgoldenrod4" "mediumseagreen" "blush"
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163 "mediumorchid2" "lightskyblue1" "darkslateblue" "midnightblue"
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164 "lightsalmon1" "lemonchiffon" "yellow" "lightsalmon" "coral"
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165 "dodgerblue3" "darkorange4" "blue" "royalblue4" "red" "green" "cyan"
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166 "darkviolet" "darksalmon" "darkorange" "blue" "pink" "magenta2"
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167 "sienna4" "khaki2" "grey75" "grey74" "grey73" "grey69" "grey68" "grey35"
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168 "grey13" "gray90" "gray81" "gray55" "gray51" "gray31" "snow2" "pink3"
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169 "grey7" "gray1" "red4" "red3" "tan" "red" "yellow" "mediumvioletred"
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170 "lightslategrey" "lavenderblush4" "turquoise" "darkturquoise"
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171 "darkslategrey" "lightskyblue" "lightsalmon4" "lightsalmon3"
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172 "forestgreen" "dodgerblue4" "orchid" "rosybrown4" "brown" "peachpuff3"
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173 "palegreen3" "orangered2" "rose" "lightcyan4" "indianred4" "indianred3"
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174 "seagreen2" "indianred" "deeppink1" "navyblue" "lavender" "grey"
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175 "deeppink" "salmon4" "salmon3" "oldlace" "grey78" "grey77" "grey54"
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176 "grey45" "grey21" "gray97" "gray96" "gray95" "gray88" "gray87" "gray86"
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177 "gray70" "gray57" "gray38" "gray12" "gray11" "plum3" "linen" "gray9"
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178 "gray8" "blue4" "beige" "turquoise" "blue" "lemonchiffon4"
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179 "darkseagreen1" "antiquewhite3" "mediumorchid" "springgreen"
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180 "turquoise4" "steelblue3" "mistyrose2" "lightcyan2" "red" "firebrick2"
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181 "royalblue" "cadetblue" "skyblue3" "yellow3" "salmon1" "orange4"
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182 "hotpink" "grey90" "gray56" "gray39" "gray18" "gray14" "plum4" "grey6"
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183 "gray6" "gold3" "gold1" "blue2" "tan2" "cyan" "mediumspringgreen"
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184 "darkolivegreen2" "goldenrod" "lightsteelblue" "brown" "whip"
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185 "chartreuse3" "violetred4" "royalblue2" "royalblue1" "papayawhip"
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186 "mistyrose3" "lightcyan1" "aquamarine" "skyblue4" "hotpink4" "hotpink3"
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187 "hotpink2" "dimgray" "tomato" "grey66" "grey65" "grey64" "grey33"
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188 "grey27" "gray76" "gray69" "gray68" "grey0" "azure" "green"
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189 "darkgoldenrod4" "darkgoldenrod3" "darkgoldenrod2" "darkgoldenrod"
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190 "brown" "lightsalmon2" "deepskyblue4" "deepskyblue3" "deepskyblue2"
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191 "deepskyblue" "darkorange1" "violetred3" "violetred2" "violetred1"
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192 "slateblue3" "slateblue2" "drab" "indianred1" "firebrick1" "cadetblue4"
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193 "violetred" "rosybrown" "blue" "firebrick" "grey100" "wheat4" "grey79"
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194 "grey76" "grey61" "gray93" "gray84" "gray65" "gray36" "gray32" "gray13"
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195 "gray10" "azure3" "snow1" "tan1" "gray" "darkolivegreen1" "blue"
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196 "almond" "lavenderblush3" "lavenderblush2" "lavenderblush1"
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197 "darkolivegreen" "lavenderblush" "aquamarine2" "red" "olivedrab2"
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198 "mistyrose4" "mistyrose1" "lightcyan3" "lightcoral" "chartreuse"
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199 "peachpuff" "palegreen" "mintcream" "skyblue2" "moccasin" "tomato1"
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200 "orchid3" "maroon3" "salmon" "grey81" "grey62" "grey39" "grey38"
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201 "grey37" "gray92" "gray83" "gray66" "gray54" "gray50" "gray30" "gray19"
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202 "gray15" "azure4" "grey3" "tan3" "pink" "gray" "blue" "lightsteelblue2"
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203 "lightsteelblue1" "green" "lightslategray" "lemonchiffon2"
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204 "springgreen1" "greenyellow" "chartreuse2" "grey" "royalblue3"
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205 "powderblue" "peachpuff2" "palegreen2" "cream" "slateblue" "seashell2"
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206 "deeppink2" "darkkhaki" "maroon4" "sienna" "grey71" "grey67" "grey18"
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207 "gray59" "gray43" "gray25" "bisque" "red1" "mediumslateblue"
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208 "lightgoldenrod1" "goldenrod" "paleturquoise3" "lightskyblue4" "green"
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209 "yellow" "smoke" "blue" "white" "steelblue4" "rosybrown3" "peachpuff1"
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210 "palegreen1" "blueviolet" "seashell4" "sienna3" "grey40" "gray91"
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211 "gray82" "gray5" "cyan2" "cyan1" "blue1" "snow" "lightgoldenrod2"
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212 "lightslateblue" "mediumorchid3" "darkseagreen4" "springgreen3" "green"
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213 "slategray4" "slategray3" "slategray2" "blue" "peachpuff4" "palegreen4"
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214 "green" "orangered3" "goldenrod1" "ghostwhite" "firebrick4" "firebrick3"
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215 "cadetblue3" "slategray" "seashell3" "honeydew3" "cornsilk4" "cornsilk2"
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216 "purple1" "dimgrey" "khaki1" "ivory3" "grey70" "grey60" "grey32"
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217 "grey22" "grey12" "gray98" "gray89" "gray71" "gray64" "gray60" "gray49"
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218 "azure2" "gray3" "paleturquoise1" "mediumpurple1" "purple"
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219 "lemonchiffon1" "blue" "navajowhite3" "darkorchid1" "orange"
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220 "goldenrod2" "khaki" "chocolate2" "burlywood2" "honeydew1" "darkgreen"
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221 "thistle3" "thistle2" "thistle1" "thistle" "maroon2" "maroon1" "grey53"
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222 "grey44" "grey25" "gray74" "gray45" "gray41" "gray35" "gray27" "gray23"
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223 "gray16" "brown4" "wheat" "coral" "tan4" "lightgoldenrodyellow" "blue"
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224 "green" "gray" "palevioletred3" "mediumpurple4" "mediumpurple3"
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225 "saddlebrown" "blue" "darkorchid4" "darkorchid3" "puff" "olivedrab4"
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226 "lightblue4" "lightpink" "lightgray" "honeydew2" "cornsilk1" "lace"
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227 "sienna1" "bisque4" "orchid" "khaki3" "grey84" "grey83" "grey82"
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228 "grey72" "grey52" "grey43" "grey26" "grey14" "grey10" "gray75" "gray53"
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229 "gray21" "gray20" "brown3" "grey8" "red2" "navy" "grey" "gold"
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230 "mediumaquamarine" "lightgoldenrod" "darkslategray4" "darkseagreen3"
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231 "darkseagreen2" "antiquewhite4" "white" "springgreen4" "lightyellow4"
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232 "white" "aquamarine1" "turquoise3" "steelblue2" "rosybrown2" "pink"
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233 "gray" "indianred2" "dodgerblue" "green" "seagreen1" "deeppink4"
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234 "aliceblue" "magenta1" "pink" "sienna2" "orchid1" "gray100" "grey97"
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235 "grey94" "grey87" "grey86" "grey51" "grey42" "grey19" "gray94" "gray85"
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236 "gray61" "brown2" "khaki" "grey1" "gold4" "blue" "green" "grey"
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237 "turquoise" "paleturquoise" "mediumorchid4" "antiquewhite2"
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238 "lightyellow2" "violet" "salmon" "chartreuse1" "turquoise1" "sandybrown"
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239 "orangered1" "lightpink1" "lightblue2" "lightblue1" "grey" "seagreen4"
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240 "seagreen3" "lightblue" "deeppink3" "burlywood" "seashell" "hotpink1"
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241 "gray" "yellow4" "yellow" "purple" "orange" "ivory4" "grey99" "grey89"
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242 "grey63" "grey58" "grey49" "grey31" "grey24" "grey20" "green4" "green1"
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243 "gray73" "gray67" "coral3" "coral2" "plum2" "pink4" "ivory" "gray4"
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244 "gray2" "gold2" "aquamarine" "grey" "lightgoldenrod3" "darkolivegreen3"
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245 "darkgoldenrod1" "goldenrod" "orchid" "chiffon" "navajowhite4"
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246 "deepskyblue1" "lightyellow" "floralwhite" "blue" "mediumblue"
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247 "chocolate4" "chocolate3" "burlywood4" "turquoise" "steelblue" "green"
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248 "lawngreen" "honeydew4" "seagreen" "orchid4" "wheat1" "violet" "ivory1"
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249 "grey88" "grey85" "grey57" "grey56" "grey55" "grey48" "grey47" "grey46"
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250 "grey30" "grey17" "gray47" "gray29" "pink2" "grey5" "grey4" "green"
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251 "gray0" "brown" "lightsteelblue4" "darkolivegreen4" "palevioletred4"
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252 "blue" "darkslategray3" "darkslategray2" "darkslategray1"
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253 "blanchedalmond" "palegoldenrod" "blue" "lightseagreen" "lemonchiffon3"
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254 "darkslategray" "green" "darkseagreen" "antiquewhite" "darkorange2"
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255 "chartreuse4" "blue" "rosybrown1" "olivedrab3" "lightpink2" "orangered"
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256 "thistle4" "blue" "cornsilk" "salmon2" "orchid2" "ivory2" "grey93"
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257 "grey92" "grey91" "grey36" "grey29" "grey28" "grey16" "gray79" "gray78"
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258 "gray77" "gray48" "gray17" "coral4" "coral1" "plum1" "pink1" "grey9"
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259 "grey2" "gray7" "cyan4" "blue3" "plum" "cornflowerblue" "lightskyblue2"
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260 "antiquewhite1" "navajowhite2" "navajowhite1" "lightyellow3"
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261 "navajowhite" "darkorange3" "whitesmoke" "turquoise2" "steelblue1"
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262 "lightpink4" "lightblue3" "green" "chocolate1" "blue" "olivedrab"
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263 "lightgrey" "chocolate" "magenta4" "magenta3" "yellow1" "purple3"
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264 "purple2" "orange2" "orange1" "magenta" "bisque1" "wheat2" "maroon"
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265 "khaki4" "grey96" "grey95" "grey80" "grey50" "grey41" "grey15" "grey11"
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266 "gray80" "gray58" "gray40" "gray34" "gray22" "brown1" "snow3"
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267 "mediumturquoise" "lightsteelblue3" "palevioletred2" "palevioletred1"
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268 "paleturquoise2" "green" "palevioletred" "mediumorchid1" "white"
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269 "mediumpurple" "lightyellow1" "dodgerblue2" "dodgerblue1" "violet"
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270 "aquamarine3" "slategray1" "gray" "orangered4" "lightpink3" "blue"
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271 "darkorchid" "cadetblue1" "burlywood3" "seashell1" "cornsilk3" "tomato4"
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272 "tomato2" "wheat3" "grey98" "grey59" "grey23" "green3" "green2" "gray72"
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273 "gray62" "gray52" "gray46" "gray42" "gray28" "gray24" "white" "cyan3"
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274 "black" )
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275 '("Red" "Blue" "Purple" "Magenta" "Orange" "Yellow" "Green" "Brown"
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276 "Dark Gray" "Light Gray" "Black" "Cyan")
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277 ))
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278
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279
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280 (defvar hproperty:color-ptr nil
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281 "Pointer to current color name table to use for Hyperbole buttons.")
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282
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283 (defconst hproperty:good-colors
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284 (if (eq window-system 'x)
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285 '(
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286 "medium violet red" "indianred4" "firebrick1" "DarkGoldenrod"
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287 "NavyBlue" "darkorchid" "tomato3" "mediumseagreen" "deeppink"
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288 "forestgreen" "mistyrose4" "slategrey" "purple4" "dodgerblue3"
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289 "mediumvioletred" "lightsalmon3" "orangered2" "turquoise4" "Gray55"
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290 )
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291 hproperty:color-list)
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292 "Good colors for contrast against wheat background and black foreground.")
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293
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294
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295 ;;; ************************************************************************
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296 ;;; Public functions
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297 ;;; ************************************************************************
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298
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299 (defun hproperty:cycle-but-color (&optional color)
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300 "Switches button color to optional COLOR name or next item referenced by hproperty:color-ptr."
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301 (interactive "sHyperbole button color: ")
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302 (if (not (display-color-p))
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303 nil
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304 (if color (setq hproperty:color-ptr nil))
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305 (set-face-foreground
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306 hproperty:but-face (or color (car (hproperty:list-cycle hproperty:color-ptr hproperty:good-colors))))
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307 (hproperty:set-flash-color)
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308 (sit-for 0) ;; Force display update
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309 t))
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310
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311 (defun hproperty:set-flash-color ()
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312 "Set button flashing colors based upon current color set."
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313 (if (not (display-color-p))
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314 nil
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315 (set-face-background hproperty:flash-face (hproperty:but-color))
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316 (set-face-foreground hproperty:flash-face (hproperty:background))))
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317
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318 (defun hproperty:but-p (&optional pos)
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319 "Return non-nil at point or optional POS iff face is eq to hproperty:but-face."
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320 (memq t (mapcar (function (lambda (props)
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321 (eq (overlay-get props 'face) hproperty:but-face)))
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322 (overlays-at (or pos (point))))))
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323
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324 (defun hproperty:set-but-face (pos face)
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325 (let ((but (hproperty:but-get pos)))
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326 (if but (overlay-put but 'face face))))
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327
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328 (defun hproperty:but-flash ()
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329 "Flash a Hyperbole button at or near point to indicate selection."
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330 (interactive)
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331 (let ((ibut) (prev)
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332 (start (hattr:get 'hbut:current 'lbl-start))
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333 (end (hattr:get 'hbut:current 'lbl-end))
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334 (b) (a))
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335 (if (and start end (setq prev (hproperty:but-p start)
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336 ibut t))
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337 (if (not prev) (hproperty:but-add start end hproperty:but-face))
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338 (setq start (point)))
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339 (setq b (and (hproperty:but-p start) hproperty:but-face))
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340 (if (setq a b)
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341 (progn
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342 (hproperty:set-but-face start hproperty:flash-face)
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343 (sit-for 0) ;; Force display update
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344 ;; Delay before redraw button
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345 (let ((i 0)) (while (< i hproperty:but-flash-time) (setq i (1+ i))))
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346 (hproperty:set-but-face start a)
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347 (sit-for 0);; Force display update
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348 ))
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349 (if (and ibut (not prev)) (hproperty:but-delete start))
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350 ))
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351
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352 (defun hproperty:set-item-highlight (&optional background foreground)
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353 "Setup or reset item highlight face using optional BACKGROUND and FOREGROUND."
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354 (make-local-variable 'hproperty:item-face)
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355 (if (stringp background) (setq hproperty:item-highlight-color background))
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356 (if (not hproperty:highlight-face)
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357 (progn
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358 (setq hproperty:highlight-face (make-face 'hproperty:highlight-face))
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359 (set-face-foreground hproperty:highlight-face (or foreground
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360 (hproperty:background)))
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361 (set-face-underline-p hproperty:highlight-face nil)))
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362
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363 (let ((update-rolo-highlight-flag
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364 (and (boundp 'rolo-highlight-face)
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365 (internal-facep rolo-highlight-face)
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366 (or (null (face-foreground rolo-highlight-face))
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367 (face-equal hproperty:highlight-face rolo-highlight-face)))))
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368 (if (not (equal (face-background hproperty:highlight-face)
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369 hproperty:item-highlight-color))
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370 (set-face-background hproperty:highlight-face
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371 hproperty:item-highlight-color))
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372 (and background (not (equal (face-background
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373 hproperty:highlight-face) background))
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374 (set-face-background hproperty:highlight-face background))
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375 (and foreground (not (equal (face-foreground
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376 hproperty:highlight-face) foreground))
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377 (set-face-foreground hproperty:highlight-face foreground))
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378 (setq hproperty:item-face hproperty:highlight-face)
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379 (if update-rolo-highlight-flag
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380 (copy-face hproperty:highlight-face rolo-highlight-face))))
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381
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382 (defun hproperty:select-item (&optional pnt)
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383 "Select item in current buffer at optional position PNT using hproperty:item-face."
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384 (if pnt (goto-char pnt))
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385 (skip-chars-forward " \t")
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386 (skip-chars-backward "^ \t\n")
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387 (let ((start (point)))
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388 (save-excursion
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389 (skip-chars-forward "^ \t\n")
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390 (hproperty:but-add start (point) hproperty:item-face)
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391 ))
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392 (sit-for 0) ;; Force display update
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393 )
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394
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395 (defun hproperty:select-line (&optional pnt)
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396 "Select line in current buffer at optional position PNT using hproperty:item-face."
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397 (if pnt (goto-char pnt))
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398 (save-excursion
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399 (beginning-of-line)
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400 (hproperty:but-add (point) (progn (end-of-line) (point)) hproperty:item-face))
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401 (sit-for 0) ;; Force display update
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402 )
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403
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404 ;;; ************************************************************************
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|
405 ;;; Private variables
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406 ;;; ************************************************************************
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407
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408 (defvar hproperty:but-face (progn (make-face 'hbut) 'hbut) "Face for hyper-buttons.")
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409 (setq hproperty:but hproperty:but-face)
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410 (set-face-foreground hproperty:but-face (hproperty:but-color))
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411 (set-face-background hproperty:but-face (hproperty:background))
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412
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413 (defvar hproperty:flash-face (progn (make-face 'hbut-flash) 'hbut-flash)
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414 "Face for flashing hyper-buttons.")
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415 (hproperty:set-flash-color)
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416
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417 (defvar hproperty:item-button nil
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418 "Button used to highlight an item in a listing buffer.")
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419 (make-variable-buffer-local 'hproperty:item-button)
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420 (defvar hproperty:item-face nil "Item marking face.")
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421 (defvar hproperty:highlight-face nil
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422 "Item highlighting face. Use (hproperty:set-item-highlight) to set.")
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423 (if hproperty:highlight-face
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424 nil
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425 ;; Reverse foreground and background colors for default block-style highlighting.
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426 (hproperty:set-item-highlight (hproperty:foreground) (hproperty:background)))
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427
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428 (provide 'hui-em19-b)
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