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617
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1 /* Definitions of marked slots in consoles
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2 Copyright (C) 1990, 1992, 1993 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* We define the Lisp_Objects in the device structure in a separate file
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24 because there are numerous places we want to iterate over them, such
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25 as when defining them in the structure, initializing them, or marking
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26 them.
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27
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28 To use, define MARKED_SLOT before including this file. In the structure
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29 definition, you also need to define FRAME_SLOT_DECLARATION. No need to
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30 undefine either value; that happens automatically. */
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31
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32 /* Name of this device, for resourcing and printing purposes.
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33 If not explicitly given, it's initialized in a device-specific
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34 manner. */
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35 MARKED_SLOT (name);
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36
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37 /* What this device is connected to */
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38 MARKED_SLOT (connection);
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39
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40 /* A canonical name for the connection that is used to determine
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41 whether `make-device' is being called on an existing device. */
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42 MARKED_SLOT (canon_connection);
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43
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44 /* List of frames on this device. */
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45 MARKED_SLOT (frame_list);
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46
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47 /* The console this device is on. */
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48 MARKED_SLOT (console);
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49
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50 /* Frame which is "currently selected". This is what `selected-frame'
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51 returns and is the default frame for many operations. This may
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52 not be the same as frame_with_focus; `select-frame' changes the
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53 selected_frame but not the frame_with_focus. However, eventually
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54 either the two values will be the same, or frame_with_focus will
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55 be nil: right before waiting for an event, the focus is changed
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56 to point to the selected_frame if XEmacs currently has the focus
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57 on this device. Note that frame_with_focus may be nil (none of the
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58 frames on this device have the window-system focus), but
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59 selected_frame will never be nil if there are any frames on
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60 the device. */
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61 MARKED_SLOT (selected_frame);
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62 /* Frame that currently contains the window-manager focus, or none.
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63 Note that we've split frame_with_focus into two variables.
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64 frame_with_focus_real is the value we use most of the time,
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65 but frame_with_focus_for_hooks is used for running the select-frame-hook
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66 and deselect-frame-hook. We do this because we split the focus handling
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67 into two parts: one part (deals with drawing the solid/box cursor)
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68 runs as soon as a focus event is received; the other (running the
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69 hooks) runs after any pending sit-for/sleep-for/accept-process-output
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70 calls are done. */
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71 MARKED_SLOT (frame_with_focus_real);
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72 MARKED_SLOT (frame_with_focus_for_hooks);
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73 /* If we have recently issued a request to change the focus as a
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74 result of select-frame having been called, the following variable
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75 records the frame we are trying to focus on. The reason for this
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76 is that the window manager may not grant our request to change
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77 the focus (so we can't just change frame_with_focus), and we don't
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78 want to keep sending requests again and again to the window manager.
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79 This variable is reset whenever a focus-change event is seen. */
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80 MARKED_SLOT (frame_that_ought_to_have_focus);
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81
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82 /* Color class of this device. */
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83 MARKED_SLOT (device_class);
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84
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85 /* Alist of values for user-defined tags in this device. */
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86 MARKED_SLOT (user_defined_tags);
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87
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88 /* Hash tables for device-specific objects (fonts, colors, etc).
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89 These are key-weak hash tables (or hash tables containing key-weak
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90 hash tables) so that they disappear when the key goes away. */
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91
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92 /* This is a simple key-weak hash table hashing color names to
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93 instances. */
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94 MARKED_SLOT (color_instance_cache);
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95
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96 /* This is a simple key-weak hash table hashing font names to
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97 instances. */
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98 MARKED_SLOT (font_instance_cache);
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99
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100 #ifdef MULE
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101 /* This is a bi-level cache, where the hash table in this slot here
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102 indexes charset objects to key-weak hash tables, which in turn
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103 index font names to more specific font names that match the
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104 given charset's registry. This speeds up the horrendously
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105 slow XListFonts() operation that needs to be done in order
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106 to determine an appropriate font. */
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107 MARKED_SLOT (charset_font_cache);
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108 #endif
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109
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110 /* This is a bi-level cache, where the hash table in this slot here
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111 indexes image-instance-type masks (there are currently 6
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112 image-instance types and thus 64 possible masks) to key-weak hash
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113 tables like the one for colors. */
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114 MARKED_SLOT (image_instance_cache);
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115
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116 #undef MARKED_SLOT
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