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1 ;;; objects.el --- Lisp interface to C window-system objects
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2 ;; Keywords: faces internal
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3
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4 ;; Copyright (C) 1994 Board of Trustees, University of Illinois
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5 ;; Copyright (C) 1995 Ben Wing
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6
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7 ;; Author: Chuck Thompson <cthomp@cs.uiuc.edu>,
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8 ;; Ben Wing <wing@666.com>
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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24 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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25
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26 ;;; Synched up with: Not in FSF.
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27
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28 (defun ws-object-property-1 (function object domain &optional matchspec)
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29 (let ((instance (if matchspec
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30 (specifier-matching-instance object matchspec domain)
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31 (specifier-instance object domain))))
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32 (and instance (funcall function instance))))
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33
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34 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; font specifiers
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35
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36 (defun make-font-specifier (spec-list)
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37 "Create a new `font' specifier object with the given specification list.
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38 SPEC-LIST can be a list of specifications (each of which is a cons of a
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39 locale and a list of instantiators), a single instantiator, or a list
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40 of instantiators. See `make-specifier' for more information about
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41 specifiers."
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42 (make-specifier-and-init 'font spec-list))
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43
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44 (defun font-name (font &optional domain charset)
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45 "Return the name of the FONT in the specified DOMAIN, if any.
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46 FONT should be a font specifier object and DOMAIN is normally a window
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47 and defaults to the selected window if omitted. This is equivalent
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48 to using `specifier-instance' and applying `font-instance-name' to
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49 the result. See `make-specifier' for more information about specifiers."
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50 (ws-object-property-1 'font-instance-name font domain charset))
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51
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52 (defun font-ascent (font &optional domain charset)
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53 "Return the ascent of the FONT in the specified DOMAIN, if any.
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54 FONT should be a font specifier object and DOMAIN is normally a window
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55 and defaults to the selected window if omitted. This is equivalent
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56 to using `specifier-instance' and applying `font-instance-ascent' to
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57 the result. See `make-specifier' for more information about specifiers."
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58 (ws-object-property-1 'font-instance-ascent font domain charset))
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59
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60 (defun font-descent (font &optional domain charset)
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61 "Return the descent of the FONT in the specified DOMAIN, if any.
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62 FONT should be a font specifier object and DOMAIN is normally a window
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63 and defaults to the selected window if omitted. This is equivalent
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64 to using `specifier-instance' and applying `font-instance-descent' to
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65 the result. See `make-specifier' for more information about specifiers."
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66 (ws-object-property-1 'font-instance-descent font domain charset))
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67
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68 (defun font-width (font &optional domain charset)
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69 "Return the width of the FONT in the specified DOMAIN, if any.
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70 FONT should be a font specifier object and DOMAIN is normally a window
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71 and defaults to the selected window if omitted. This is equivalent
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72 to using `specifier-instance' and applying `font-instance-width' to
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73 the result. See `make-specifier' for more information about specifiers."
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74 (ws-object-property-1 'font-instance-width font domain charset))
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75
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76 (defun font-height (font &optional domain charset)
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77 "Return the height of the FONT in the specified DOMAIN, if any.
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78 FONT should be a font specifier object and DOMAIN is normally a window
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79 and defaults to the selected window if omitted. This is equivalent
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80 to using `specifier-instance' and applying `font-instance-height' to
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81 the result. See `make-specifier' for more information about specifiers."
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82 (ws-object-property-1 'font-instance-height font domain charset))
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83
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84 (defun font-proportional-p (font &optional domain charset)
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85 "Return whether FONT is proportional in the specified DOMAIN, if known.
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86 FONT should be a font specifier object and DOMAIN is normally a window
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87 and defaults to the selected window if omitted. This is equivalent
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88 to using `specifier-instance' and applying `font-instance-proportional-p' to
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89 the result. See `make-specifier' for more information about specifiers."
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90 (ws-object-property-1 'font-instance-proportional-p font domain charset))
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91
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92 (defun font-properties (font &optional domain charset)
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93 "Return the properties of the FONT in the specified DOMAIN, if any.
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94 FONT should be a font specifier object and DOMAIN is normally a window
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95 and defaults to the selected window if omitted. This is equivalent
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96 to using `specifier-instance' and applying `font-instance-properties'
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97 to the result. See `make-specifier' for more information about specifiers."
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98 (ws-object-property-1 'font-instance-properties font domain charset))
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99
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100 (defun font-truename (font &optional domain charset)
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101 "Return the truename of the FONT in the specified DOMAIN, if any.
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102 FONT should be a font specifier object and DOMAIN is normally a window
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103 and defaults to the selected window if omitted. This is equivalent
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104 to using `specifier-instance' and applying `font-instance-truename'
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105 to the result. See `make-specifier' for more information about specifiers."
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106 (ws-object-property-1 'font-instance-truename font domain charset))
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107
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108 (defun font-instance-height (font-instance)
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109 "Return the height in pixels of FONT-INSTANCE.
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110 The returned value is the maximum height for all characters in the font,\n\
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111 and is equivalent to the sum of the font instance's ascent and descent."
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112 (+ (font-instance-ascent font-instance)
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113 (font-instance-descent font-instance)))
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114
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115 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; color specifiers
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116
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117 (defun make-color-specifier (spec-list)
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118 "Create a new `color' specifier object with the given specification list.
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119 SPEC-LIST can be a list of specifications (each of which is a cons of a
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120 locale and a list of instantiators), a single instantiator, or a list
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121 of instantiators. See `make-specifier' for a detailed description of
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122 how specifiers work."
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123 (make-specifier-and-init 'color spec-list))
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124
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125 (defun color-name (color &optional domain)
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126 "Return the name of the COLOR in the specified DOMAIN, if any.
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127 COLOR should be a color specifier object and DOMAIN is normally a window
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128 and defaults to the selected window if omitted. This is equivalent
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129 to using `specifier-instance' and applying `color-instance-name' to
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130 the result. See `make-specifier' for more information about specifiers."
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131 (ws-object-property-1 'color-instance-name color domain))
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132
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133 (defun color-rgb-components (color &optional domain)
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134 "Return the RGB components of the COLOR in the specified DOMAIN, if any.
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135 COLOR should be a color specifier object and DOMAIN is normally a window
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136 and defaults to the selected window if omitted. This is equivalent
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137 to using `specifier-instance' and applying `color-instance-rgb-components'
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138 to the result. See `make-specifier' for more information about specifiers."
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139 (ws-object-property-1 'color-instance-rgb-components color domain))
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140
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141 ;;; objects.el ends here.
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142
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