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0
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1 /* Generic GUI code. (menubars, scrollbars, toolbars, dialogs)
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2 Copyright (C) 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1995, 1996 Ben Wing.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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259
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5 Copyright (C) 1998 Free Software Foundation, Inc.
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0
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 #include <config.h>
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251
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27 #include "lisp.h"
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231
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28 #include "gui.h"
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384
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29 #include "elhash.h"
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380
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30 #include "bytecode.h"
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0
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31
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32 Lisp_Object Q_active, Q_suffix, Q_keys, Q_style, Q_selected;
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377
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33 Lisp_Object Q_filter, Q_config, Q_included, Q_key_sequence;
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388
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34 Lisp_Object Q_accelerator, Q_label, Q_callback;
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0
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35 Lisp_Object Qtoggle, Qradio;
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36
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231
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37 #ifdef HAVE_POPUPS
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38
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39 /* count of menus/dboxes currently up */
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40 int popup_up_p;
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41
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42 DEFUN ("popup-up-p", Fpopup_up_p, 0, 0, 0, /*
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43 Return t if a popup menu or dialog box is up, nil otherwise.
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44 See `popup-menu' and `popup-dialog-box'.
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45 */
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46 ())
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47 {
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48 return popup_up_p ? Qt : Qnil;
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49 }
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384
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50 #endif /* HAVE_POPUPS */
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231
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51
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52 int
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53 separator_string_p (CONST char *s)
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54 {
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55 CONST char *p;
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56 char first;
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57
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58 if (!s || s[0] == '\0')
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59 return 0;
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60 first = s[0];
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61 if (first != '-' && first != '=')
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62 return 0;
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272
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63 for (p = s; *p == first; p++)
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64 ;
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231
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65
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272
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66 return (*p == '!' || *p == ':' || *p == '\0');
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231
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67 }
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68
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286
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69 /* Massage DATA to find the correct function and argument. Used by
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70 popup_selection_callback() and the msw code. */
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71 void
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288
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72 get_gui_callback (Lisp_Object data, Lisp_Object *fn, Lisp_Object *arg)
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286
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73 {
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74 if (SYMBOLP (data)
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75 || (COMPILED_FUNCTIONP (data)
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76 && XCOMPILED_FUNCTION (data)->flags.interactivep)
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77 || (EQ (XCAR (data), Qlambda)
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78 && !NILP (Fassq (Qinteractive, Fcdr (Fcdr (data))))))
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79 {
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80 *fn = Qcall_interactively;
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81 *arg = data;
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82 }
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83 else if (CONSP (data))
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84 {
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85 *fn = Qeval;
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86 *arg = data;
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87 }
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88 else
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89 {
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90 *fn = Qeval;
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91 *arg = list3 (Qsignal,
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92 list2 (Qquote, Qerror),
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93 list2 (Qquote, list2 (build_translated_string
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94 ("illegal callback"),
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95 data)));
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96 }
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97 }
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98
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272
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99 /*
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251
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100 * Initialize the gui_item structure by setting all (GC-protected)
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101 * fields to their default values. The defaults are t for :active and
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102 * :included values, and nil for others.
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103 */
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104 void
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105 gui_item_init (struct gui_item *pgui_item)
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106 {
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272
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107 pgui_item->name = Qnil;
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251
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108 pgui_item->callback = Qnil;
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272
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109 pgui_item->suffix = Qnil;
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110 pgui_item->active = Qt;
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251
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111 pgui_item->included = Qt;
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288
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112 pgui_item->config = Qnil;
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272
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113 pgui_item->filter = Qnil;
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114 pgui_item->style = Qnil;
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251
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115 pgui_item->selected = Qnil;
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272
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116 pgui_item->keys = Qnil;
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251
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117 }
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118
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119 /*
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120 * Add a value VAL associated with keyword KEY into PGUI_ITEM
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121 * structure. If KEY is not a keyword, or is an unknown keyword, then
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122 * error is signaled.
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123 */
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272
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124 void
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251
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125 gui_item_add_keyval_pair (struct gui_item *pgui_item,
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388
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126 Lisp_Object key, Lisp_Object val,
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127 Error_behavior errb)
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251
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128 {
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129 if (!KEYWORDP (key))
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272
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130 signal_simple_error_2 ("Non-keyword in gui item", key, pgui_item->name);
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251
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131
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272
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132 if (EQ (key, Q_suffix)) pgui_item->suffix = val;
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133 else if (EQ (key, Q_active)) pgui_item->active = val;
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134 else if (EQ (key, Q_included)) pgui_item->included = val;
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135 else if (EQ (key, Q_config)) pgui_item->config = val;
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136 else if (EQ (key, Q_filter)) pgui_item->filter = val;
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137 else if (EQ (key, Q_style)) pgui_item->style = val;
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138 else if (EQ (key, Q_selected)) pgui_item->selected = val;
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139 else if (EQ (key, Q_keys)) pgui_item->keys = val;
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388
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140 else if (EQ (key, Q_callback)) pgui_item->callback = val;
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377
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141 else if (EQ (key, Q_key_sequence)) ; /* ignored for FSF compatability */
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142 else if (EQ (key, Q_label)) ; /* ignored for 21.0 implement in 21.2 */
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388
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143 else if (ERRB_EQ (errb, ERROR_ME))
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272
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144 signal_simple_error_2 ("Unknown keyword in gui item", key, pgui_item->name);
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251
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145 }
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146
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147 /*
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148 * ITEM is a lisp vector, describing a menu item or a button. The
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149 * function extracts the description of the item into the PGUI_ITEM
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150 * structure.
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151 */
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388
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152 static void
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153 gui_parse_item_keywords_internal (Lisp_Object item, struct gui_item *pgui_item,
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154 Error_behavior errb)
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251
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155 {
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384
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156 int length, plist_p, start;
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251
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157 Lisp_Object *contents;
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158
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159 CHECK_VECTOR (item);
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160 length = XVECTOR_LENGTH (item);
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161 contents = XVECTOR_DATA (item);
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162
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384
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163 if (length < 1)
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164 signal_simple_error ("GUI item descriptors must be at least 1 elts long", item);
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251
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165
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384
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166 /* length 1: [ "name" ]
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167 length 2: [ "name" callback ]
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259
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168 length 3: [ "name" callback active-p ]
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384
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169 or [ "name" keyword value ]
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251
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170 length 4: [ "name" callback active-p suffix ]
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171 or [ "name" callback keyword value ]
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172 length 5+: [ "name" callback [ keyword value ]+ ]
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384
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173 or [ "name" [ keyword value ]+ ]
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251
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174 */
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384
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175 plist_p = (length > 2 && (KEYWORDP (contents [1])
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176 || KEYWORDP (contents [2])));
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251
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177
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178 pgui_item->name = contents [0];
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384
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179 if (length > 1 && !KEYWORDP (contents [1]))
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180 {
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181 pgui_item->callback = contents [1];
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182 start = 2;
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183 }
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184 else
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185 start =1;
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251
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186
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259
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187 if (!plist_p && length > 2)
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251
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188 /* the old way */
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189 {
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190 pgui_item->active = contents [2];
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191 if (length == 4)
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192 pgui_item->suffix = contents [3];
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193 }
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194 else
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195 /* the new way */
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196 {
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197 int i;
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384
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198 if ((length - start) & 1)
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251
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199 signal_simple_error (
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200 "GUI item descriptor has an odd number of keywords and values",
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201 item);
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202
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384
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203 for (i = start; i < length;)
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251
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204 {
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205 Lisp_Object key = contents [i++];
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206 Lisp_Object val = contents [i++];
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388
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207 gui_item_add_keyval_pair (pgui_item, key, val, errb);
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251
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208 }
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272
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209 }
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251
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210 }
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211
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388
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212 void
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213 gui_parse_item_keywords (Lisp_Object item, struct gui_item *pgui_item)
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214 {
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215 gui_parse_item_keywords_internal (item, pgui_item, ERROR_ME);
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216 }
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217
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218 void
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219 gui_parse_item_keywords_no_errors (Lisp_Object item, struct gui_item *pgui_item)
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220 {
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221 gui_parse_item_keywords_internal (item, pgui_item, ERROR_ME_NOT);
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222 }
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223
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251
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224 /*
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225 * Decide whether a GUI item is active by evaluating its :active form
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226 * if any
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227 */
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228 int
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229 gui_item_active_p (CONST struct gui_item *pgui_item)
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230 {
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231 /* This function can call lisp */
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272
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232
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251
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233 /* Shortcut to avoid evaluating Qt each time */
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234 return (EQ (pgui_item->active, Qt)
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235 || !NILP (Feval (pgui_item->active)));
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236 }
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237
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238 /*
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384
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239 * Decide whether a GUI item is selected by evaluating its :selected form
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240 * if any
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241 */
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242 int
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243 gui_item_selected_p (CONST struct gui_item *pgui_item)
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244 {
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245 /* This function can call lisp */
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246
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247 /* Shortcut to avoid evaluating Qt each time */
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248 return (EQ (pgui_item->selected, Qt)
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249 || !NILP (Feval (pgui_item->selected)));
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250 }
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251
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252 /*
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251
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253 * Decide whether a GUI item is included by evaluating its :included
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254 * form if given, and testing its :config form against supplied CONFLIST
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255 * configuration variable
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256 */
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257 int
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258 gui_item_included_p (CONST struct gui_item *pgui_item, Lisp_Object conflist)
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259 {
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260 /* This function can call lisp */
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261
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262 /* Evaluate :included first. Shortcut to avoid evaluating Qt each time */
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263 if (!EQ (pgui_item->included, Qt)
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264 && NILP (Feval (pgui_item->included)))
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265 return 0;
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266
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267 /* Do :config if conflist is given */
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268 if (!NILP (conflist) && !NILP (pgui_item->config)
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269 && NILP (Fmemq (pgui_item->config, conflist)))
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270 return 0;
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271
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272 return 1;
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273 }
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274
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275 static DOESNT_RETURN
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276 signal_too_long_error (Lisp_Object name)
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277 {
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272
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278 signal_simple_error ("GUI item produces too long displayable string", name);
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251
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279 }
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280
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384
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281 #ifdef HAVE_WINDOW_SYSTEM
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251
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282 /*
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272
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283 * Format "left flush" display portion of an item into BUF, guarded by
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284 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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251
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285 * null character, so actual maximum size of buffer consumed is
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286 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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287 * signaled.
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288 * Return value is the offset to the terminating null character into the
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289 * buffer.
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290 */
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291 unsigned int
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292 gui_item_display_flush_left (CONST struct gui_item *pgui_item,
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272
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293 char* buf, Bytecount buf_len)
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251
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294 {
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272
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295 char *p = buf;
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296 Bytecount len;
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251
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297
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298 /* Copy item name first */
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299 CHECK_STRING (pgui_item->name);
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272
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300 len = XSTRING_LENGTH (pgui_item->name);
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301 if (len > buf_len)
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251
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302 signal_too_long_error (pgui_item->name);
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272
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303 memcpy (p, XSTRING_DATA (pgui_item->name), len);
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304 p += len;
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251
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305
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259
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306 /* Add space and suffix, if there is a suffix.
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272
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307 * If suffix is not string evaluate it */
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251
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308 if (!NILP (pgui_item->suffix))
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309 {
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272
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310 Lisp_Object suffix = pgui_item->suffix;
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259
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311 /* Shortcut to avoid evaluating suffix each time */
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272
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312 if (!STRINGP (suffix))
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259
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313 {
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272
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314 suffix = Feval (suffix);
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315 CHECK_STRING (suffix);
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259
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316 }
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272
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317
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318 len = XSTRING_LENGTH (suffix);
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319 if (p + len + 1 > buf + buf_len)
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251
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320 signal_too_long_error (pgui_item->name);
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272
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321 *(p++) = ' ';
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322 memcpy (p, XSTRING_DATA (suffix), len);
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323 p += len;
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251
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324 }
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272
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325 *p = '\0';
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326 return p - buf;
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251
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327 }
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328
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329 /*
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272
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330 * Format "right flush" display portion of an item into BUF, guarded by
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331 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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251
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332 * null character, so actual maximum size of buffer consumed is
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333 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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334 * signaled.
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335 * Return value is the offset to the terminating null character into the
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336 * buffer.
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337 */
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338 unsigned int
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339 gui_item_display_flush_right (CONST struct gui_item *pgui_item,
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272
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340 char* buf, Bytecount buf_len)
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251
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341 {
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342 *buf = 0;
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343
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344 /* Have keys? */
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345 if (!menubar_show_keybindings)
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346 return 0;
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347
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348 /* Try :keys first */
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349 if (!NILP (pgui_item->keys))
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350 {
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351 CHECK_STRING (pgui_item->keys);
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352 if (XSTRING_LENGTH (pgui_item->keys) > buf_len)
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353 signal_too_long_error (pgui_item->name);
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272
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354 strcpy (buf, (CONST char *) XSTRING_DATA (pgui_item->keys));
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251
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355 return XSTRING_LENGTH (pgui_item->keys);
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356 }
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357
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358 /* See if we can derive keys out of callback symbol */
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359 if (SYMBOLP (pgui_item->callback))
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360 {
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361 char buf2 [1024];
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272
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362 Bytecount len;
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251
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363
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364 where_is_to_char (pgui_item->callback, buf2);
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365 len = strlen (buf2);
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366 if (len > buf_len)
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367 signal_too_long_error (pgui_item->name);
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368 strcpy (buf, buf2);
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369 return len;
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370 }
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371
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372 /* No keys - no right flush display */
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373 return 0;
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374 }
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384
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375 #endif /* HAVE_WINDOW_SYSTEM */
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251
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376
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384
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377 Lisp_Object
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378 mark_gui_item (struct gui_item* p, void (*markobj) (Lisp_Object))
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379 {
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380 markobj (p->name);
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381 markobj (p->callback);
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382 markobj (p->suffix);
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383 markobj (p->active);
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384 markobj (p->included);
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385 markobj (p->config);
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386 markobj (p->filter);
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387 markobj (p->style);
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388 markobj (p->selected);
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389 markobj (p->keys);
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390
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391 return Qnil;
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392 }
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393
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394 int
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395 gui_item_hash (Lisp_Object hashtable, struct gui_item* g, int slot)
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396 {
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397 int hashid = HASH2 (internal_hash (g->callback, 0), internal_hash (g->name, 0));
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398 int id = GUI_ITEM_ID_BITS (hashid, slot);
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399 while (!NILP (Fgethash (make_int (id),
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400 hashtable, Qnil)))
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401 {
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402 id = GUI_ITEM_ID_BITS (id + 1, slot);
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403 }
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404 return id;
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405 }
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231
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406
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0
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407 void
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408 syms_of_gui (void)
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409 {
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410 defkeyword (&Q_active, ":active");
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411 defkeyword (&Q_suffix, ":suffix");
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412 defkeyword (&Q_keys, ":keys");
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377
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413 defkeyword (&Q_key_sequence,":key-sequence");
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0
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414 defkeyword (&Q_style, ":style");
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415 defkeyword (&Q_selected, ":selected");
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416 defkeyword (&Q_filter, ":filter");
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417 defkeyword (&Q_config, ":config");
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418 defkeyword (&Q_included, ":included");
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175
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419 defkeyword (&Q_accelerator, ":accelerator");
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377
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420 defkeyword (&Q_label, ":label");
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388
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421 defkeyword (&Q_callback, ":callback");
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0
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422
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423 defsymbol (&Qtoggle, "toggle");
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424 defsymbol (&Qradio, "radio");
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231
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425
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426 #ifdef HAVE_POPUPS
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427 DEFSUBR (Fpopup_up_p);
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428 #endif
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0
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429 }
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430
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431 void
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432 vars_of_gui (void)
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433 {
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434 }
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