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428
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1 ;;; device.el --- miscellaneous device functions not written in C
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2
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3 ;; Copyright (C) 1994-5, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995, 1996 Ben Wing
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: 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 XEmacs; 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 ;;; Synched up with: Not in FSF.
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27
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28 ;;; Commentary:
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29
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30 ;; This file is dumped with XEmacs.
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31
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32 ;;; Code:
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33
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440
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34 ;;; Initialization
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35
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36 ; Specifier tag 'printer which matches printers
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37 (define-specifier-tag 'printer (function device-printer-p))
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38
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39 ; Specifier tag 'display which matches displays
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40 (define-specifier-tag 'display (function
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41 (lambda (device)
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42 (not (device-printer-p device)))))
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43
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44 ;;; Functions
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45
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428
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46 (defun device-list ()
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47 "Return a list of all devices."
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48 (apply 'nconc (mapcar 'console-device-list (console-list))))
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49
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50 (defun device-type (&optional device)
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51 "Return the type of the specified device (e.g. `x' or `tty').
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52 This is equivalent to the type of the device's console.
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53 Value is `tty' for a tty device (a character-only terminal),
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54 `x' for a device that is a screen on an X display,
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462
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55 `gtk' for a device that is a GTK connection.
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428
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56 `ns' for a device that is a NeXTstep connection (not yet implemented),
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440
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57 `mswindows' for a device that is a MS Windows workstation,
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58 `msprinter' for a device that is a MS Windows printer connection,
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428
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59 `stream' for a stream device (which acts like a stdio stream), and
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60 `dead' for a deleted device."
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61 (or device (setq device (selected-device)))
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62 (if (not (device-live-p device)) 'dead
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63 (console-type (device-console device))))
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64
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65 (defun make-tty-device (&optional tty terminal-type controlling-process)
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66 "Create a new device on TTY.
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67 TTY should be the name of a tty device file (e.g. \"/dev/ttyp3\" under
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68 SunOS et al.), as returned by the `tty' command. A value of nil means
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69 use the stdin and stdout as passed to XEmacs from the shell.
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70 If TERMINAL-TYPE is non-nil, it should be a string specifying the
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71 type of the terminal attached to the specified tty. If it is nil,
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72 the terminal type will be inferred from the TERM environment variable.
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73 If CONTROLLING-PROCESS is non-nil, it should be an integer
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74 specifying the process id of the process in control of the specified tty. If
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75 it is nil, it is assumes to be the value returned by emacs-pid."
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76 (make-device 'tty tty (list 'terminal-type terminal-type
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77 'controlling-process controlling-process)))
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78
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79 (defun device-pixel-width (&optional device)
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80 "Return the width in pixels of DEVICE, or nil if unknown."
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81 (let ((ds (device-system-metric device 'size-device)))
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82 (and ds (car ds))))
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83
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84 (defun device-pixel-height (&optional device)
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85 "Return the height in pixels of DEVICE, or nil if unknown."
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86 (let ((ds (device-system-metric device 'size-device)))
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87 (and ds (cdr ds))))
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88
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89 (defun device-mm-width (&optional device)
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90 "Return the width in millimeters of DEVICE, or nil if unknown."
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91 (let ((ds (device-system-metric device 'size-device-mm)))
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92 (and ds (car ds))))
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93
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94 (defun device-mm-height (&optional device)
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95 "Return the height in millimeters of DEVICE, or nil if unknown."
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96 (let ((ds (device-system-metric device 'size-device-mm)))
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97 (and ds (cdr ds))))
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98
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99 (defun device-bitplanes (&optional device)
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100 "Return the number of bitplanes of DEVICE, or nil if unknown."
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101 (device-system-metric device 'num-bit-planes))
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102
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103 (defun device-color-cells (&optional device)
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104 "Return the number of color cells of DEVICE, or nil if unknown."
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105 (device-system-metric device 'num-color-cells))
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106
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1942
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107 (defun device-num-screens (&optional device)
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108 "Return the number of display screens available on DEVICE, or 1 if unknown."
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109 (device-system-metric device 'num-screens 1))
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110
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111 (defun device-backing-store (&optional device)
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112 "Return the backing store capability of DEVICE.
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113 The value may be `always', `when-mapped', `not-useful', or nil if
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114 the question is inapplicable to a certain kind of display."
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115 (device-system-metric device 'backing-store))
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116
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117 (defun device-save-under (&optional device)
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118 "Return non-nil if DEVICE supports the SaveUnder feature."
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119 (device-system-metric device 'save-under))
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120
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462
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121 (defun make-gtk-device ()
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122 "Create a new GTK device."
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123 (make-device 'gtk nil))
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124
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428
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125 (defun make-x-device (&optional display)
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126 "Create a new device connected to DISPLAY."
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127 (make-device 'x display))
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128
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129 (defun make-mswindows-device ()
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130 "Create a new mswindows device."
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131 (make-device 'mswindows nil))
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132
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133 (defun device-on-window-system-p (&optional device)
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134 "Return non-nil if DEVICE is on a window system.
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135 This generally means that there is support for the mouse, the menubar,
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136 the toolbar, glyphs, etc."
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137 (or device (setq device (selected-device)))
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138 (console-on-window-system-p (device-console device)))
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139
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140 (defun call-device-method (name device &rest args)
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141 "Call a DEVICE-specific function with the generic name NAME.
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440
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142 If DEVICE is not provided then the selected device is used."
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428
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143 (or device (setq device (selected-device)))
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144 (or (symbolp name) (error "function name must be a symbol"))
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145 (let ((devmeth (intern (concat (symbol-name
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146 (device-type device)) "-" (symbol-name name)))))
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147 (if (functionp devmeth)
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148 (if args
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149 (apply devmeth args)
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150 (funcall devmeth))
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151 nil)))
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152
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153 (defmacro define-device-method (name &optional docstring)
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154 "Define NAME to be a device method."
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155 `(defun ,name (&rest arglist) ,docstring
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156 (apply 'call-device-method (quote ,name) nil arglist)))
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157
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158 (defmacro define-device-method* (name &optional docstring)
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159 "Define NAME to be a device method."
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160 `(defun* ,name (&rest arglist) ,docstring
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161 (apply 'call-device-method (quote ,name) nil arglist)))
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162
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163 (defalias 'valid-device-type-p 'valid-console-type-p)
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164 (defalias 'device-type-list 'console-type-list)
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165 (defalias 'device-pixel-depth 'device-bitplanes)
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166
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167 ;;; device.el ends here
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