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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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286
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29 #include "bytecode.h" /* for struct Lisp_Compiled_Function */
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0
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30
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31 Lisp_Object Q_active, Q_suffix, Q_keys, Q_style, Q_selected;
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321
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32 Lisp_Object Q_filter, Q_config, Q_included, Q_key_sequence;
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33 Lisp_Object Q_accelerator, Q_label;
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0
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34 Lisp_Object Qtoggle, Qradio;
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35
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231
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36 #ifdef HAVE_POPUPS
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37
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38 /* count of menus/dboxes currently up */
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39 int popup_up_p;
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40
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41 DEFUN ("popup-up-p", Fpopup_up_p, 0, 0, 0, /*
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42 Return t if a popup menu or dialog box is up, nil otherwise.
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43 See `popup-menu' and `popup-dialog-box'.
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44 */
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45 ())
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46 {
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47 return popup_up_p ? Qt : Qnil;
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48 }
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49
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50 int
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51 separator_string_p (CONST char *s)
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52 {
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53 CONST char *p;
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54 char first;
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55
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56 if (!s || s[0] == '\0')
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57 return 0;
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58 first = s[0];
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59 if (first != '-' && first != '=')
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60 return 0;
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272
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61 for (p = s; *p == first; p++)
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62 ;
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231
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63
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272
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64 return (*p == '!' || *p == ':' || *p == '\0');
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231
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65 }
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66
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286
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67 /* Massage DATA to find the correct function and argument. Used by
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68 popup_selection_callback() and the msw code. */
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69 void
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288
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70 get_gui_callback (Lisp_Object data, Lisp_Object *fn, Lisp_Object *arg)
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286
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71 {
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72 if (SYMBOLP (data)
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73 || (COMPILED_FUNCTIONP (data)
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74 && XCOMPILED_FUNCTION (data)->flags.interactivep)
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75 || (EQ (XCAR (data), Qlambda)
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76 && !NILP (Fassq (Qinteractive, Fcdr (Fcdr (data))))))
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77 {
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78 *fn = Qcall_interactively;
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79 *arg = data;
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80 }
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81 else if (CONSP (data))
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82 {
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83 *fn = Qeval;
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84 *arg = data;
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85 }
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86 else
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87 {
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88 *fn = Qeval;
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89 *arg = list3 (Qsignal,
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90 list2 (Qquote, Qerror),
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91 list2 (Qquote, list2 (build_translated_string
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92 ("illegal callback"),
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93 data)));
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94 }
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95 }
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96
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272
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97 /*
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251
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98 * Initialize the gui_item structure by setting all (GC-protected)
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99 * fields to their default values. The defaults are t for :active and
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100 * :included values, and nil for others.
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101 */
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102 void
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103 gui_item_init (struct gui_item *pgui_item)
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104 {
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272
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105 pgui_item->name = Qnil;
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251
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106 pgui_item->callback = Qnil;
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272
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107 pgui_item->suffix = Qnil;
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108 pgui_item->active = Qt;
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251
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109 pgui_item->included = Qt;
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288
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110 pgui_item->config = Qnil;
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272
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111 pgui_item->filter = Qnil;
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112 pgui_item->style = Qnil;
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251
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113 pgui_item->selected = Qnil;
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272
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114 pgui_item->keys = Qnil;
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251
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115 }
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116
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117 /*
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118 * Add a value VAL associated with keyword KEY into PGUI_ITEM
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119 * structure. If KEY is not a keyword, or is an unknown keyword, then
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120 * error is signaled.
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121 */
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272
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122 void
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251
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123 gui_item_add_keyval_pair (struct gui_item *pgui_item,
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124 Lisp_Object key, Lisp_Object val)
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125 {
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126 if (!KEYWORDP (key))
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272
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127 signal_simple_error_2 ("Non-keyword in gui item", key, pgui_item->name);
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251
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128
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272
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129 if (EQ (key, Q_suffix)) pgui_item->suffix = val;
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130 else if (EQ (key, Q_active)) pgui_item->active = val;
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131 else if (EQ (key, Q_included)) pgui_item->included = val;
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132 else if (EQ (key, Q_config)) pgui_item->config = val;
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133 else if (EQ (key, Q_filter)) pgui_item->filter = val;
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134 else if (EQ (key, Q_style)) pgui_item->style = val;
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135 else if (EQ (key, Q_selected)) pgui_item->selected = val;
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136 else if (EQ (key, Q_keys)) pgui_item->keys = val;
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321
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137 else if (EQ (key, Q_key_sequence)) ; /* ignored for FSF compatability */
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138 else if (EQ (key, Q_label)) ; /* ignored for 21.0 implement in 21.2 */
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251
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139 else
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272
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140 signal_simple_error_2 ("Unknown keyword in gui item", key, pgui_item->name);
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251
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141 }
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142
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143 /*
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144 * ITEM is a lisp vector, describing a menu item or a button. The
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145 * function extracts the description of the item into the PGUI_ITEM
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146 * structure.
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147 */
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148 void
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149 gui_parse_item_keywords (Lisp_Object item, struct gui_item *pgui_item)
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150 {
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151 int length, plist_p;
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152 Lisp_Object *contents;
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153
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154 CHECK_VECTOR (item);
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155 length = XVECTOR_LENGTH (item);
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156 contents = XVECTOR_DATA (item);
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157
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259
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158 if (length < 2)
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159 signal_simple_error ("GUI item descriptors must be at least 2 elts long", item);
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251
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160
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259
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161 /* length 2: [ "name" callback ]
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162 length 3: [ "name" callback active-p ]
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251
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163 length 4: [ "name" callback active-p suffix ]
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164 or [ "name" callback keyword value ]
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165 length 5+: [ "name" callback [ keyword value ]+ ]
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166 */
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259
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167 plist_p = (length >= 5 || (length > 2 && KEYWORDP (contents [2])));
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251
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168
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169 pgui_item->name = contents [0];
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170 pgui_item->callback = contents [1];
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171
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259
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172 if (!plist_p && length > 2)
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251
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173 /* the old way */
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174 {
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175 pgui_item->active = contents [2];
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176 if (length == 4)
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177 pgui_item->suffix = contents [3];
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178 }
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179 else
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180 /* the new way */
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181 {
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182 int i;
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183 if (length & 1)
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184 signal_simple_error (
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185 "GUI item descriptor has an odd number of keywords and values",
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186 item);
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187
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188 for (i = 2; i < length;)
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189 {
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190 Lisp_Object key = contents [i++];
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191 Lisp_Object val = contents [i++];
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192 gui_item_add_keyval_pair (pgui_item, key, val);
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193 }
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272
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194 }
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251
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195 }
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196
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197 /*
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198 * Decide whether a GUI item is active by evaluating its :active form
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199 * if any
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200 */
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201 int
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202 gui_item_active_p (CONST struct gui_item *pgui_item)
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203 {
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204 /* This function can call lisp */
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272
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205
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251
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206 /* Shortcut to avoid evaluating Qt each time */
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207 return (EQ (pgui_item->active, Qt)
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208 || !NILP (Feval (pgui_item->active)));
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209 }
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210
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211 /*
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212 * Decide whether a GUI item is included by evaluating its :included
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213 * form if given, and testing its :config form against supplied CONFLIST
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214 * configuration variable
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215 */
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216 int
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217 gui_item_included_p (CONST struct gui_item *pgui_item, Lisp_Object conflist)
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218 {
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219 /* This function can call lisp */
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220
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221 /* Evaluate :included first. Shortcut to avoid evaluating Qt each time */
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222 if (!EQ (pgui_item->included, Qt)
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223 && NILP (Feval (pgui_item->included)))
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224 return 0;
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225
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226 /* Do :config if conflist is given */
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227 if (!NILP (conflist) && !NILP (pgui_item->config)
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228 && NILP (Fmemq (pgui_item->config, conflist)))
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229 return 0;
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230
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231 return 1;
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232 }
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233
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234 static DOESNT_RETURN
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235 signal_too_long_error (Lisp_Object name)
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236 {
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272
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237 signal_simple_error ("GUI item produces too long displayable string", name);
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251
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238 }
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239
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240 /*
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272
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241 * Format "left flush" display portion of an item into BUF, guarded by
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242 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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251
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243 * null character, so actual maximum size of buffer consumed is
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244 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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245 * signaled.
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246 * Return value is the offset to the terminating null character into the
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247 * buffer.
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248 */
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249 unsigned int
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250 gui_item_display_flush_left (CONST struct gui_item *pgui_item,
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272
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251 char* buf, Bytecount buf_len)
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251
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252 {
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272
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253 char *p = buf;
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254 Bytecount len;
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251
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255
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256 /* Copy item name first */
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257 CHECK_STRING (pgui_item->name);
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272
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258 len = XSTRING_LENGTH (pgui_item->name);
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259 if (len > buf_len)
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251
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260 signal_too_long_error (pgui_item->name);
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272
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261 memcpy (p, XSTRING_DATA (pgui_item->name), len);
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262 p += len;
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251
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263
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259
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264 /* Add space and suffix, if there is a suffix.
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272
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265 * If suffix is not string evaluate it */
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251
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266 if (!NILP (pgui_item->suffix))
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267 {
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272
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268 Lisp_Object suffix = pgui_item->suffix;
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259
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269 /* Shortcut to avoid evaluating suffix each time */
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272
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270 if (!STRINGP (suffix))
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259
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271 {
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272
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272 suffix = Feval (suffix);
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273 CHECK_STRING (suffix);
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259
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274 }
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272
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275
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276 len = XSTRING_LENGTH (suffix);
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277 if (p + len + 1 > buf + buf_len)
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251
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278 signal_too_long_error (pgui_item->name);
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272
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279 *(p++) = ' ';
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280 memcpy (p, XSTRING_DATA (suffix), len);
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281 p += len;
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251
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282 }
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272
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283 *p = '\0';
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284 return p - buf;
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251
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285 }
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286
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287 /*
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272
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288 * Format "right flush" display portion of an item into BUF, guarded by
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289 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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251
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290 * null character, so actual maximum size of buffer consumed is
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291 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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292 * signaled.
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293 * Return value is the offset to the terminating null character into the
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294 * buffer.
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295 */
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296 unsigned int
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297 gui_item_display_flush_right (CONST struct gui_item *pgui_item,
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272
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298 char* buf, Bytecount buf_len)
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251
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299 {
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300 *buf = 0;
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301
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353
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302 #ifdef HAVE_MENUBARS
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251
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303 /* Have keys? */
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304 if (!menubar_show_keybindings)
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305 return 0;
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353
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306 #endif
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251
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307
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308 /* Try :keys first */
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309 if (!NILP (pgui_item->keys))
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310 {
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311 CHECK_STRING (pgui_item->keys);
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312 if (XSTRING_LENGTH (pgui_item->keys) > buf_len)
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313 signal_too_long_error (pgui_item->name);
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272
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314 strcpy (buf, (CONST char *) XSTRING_DATA (pgui_item->keys));
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251
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315 return XSTRING_LENGTH (pgui_item->keys);
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316 }
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317
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318 /* See if we can derive keys out of callback symbol */
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319 if (SYMBOLP (pgui_item->callback))
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320 {
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321 char buf2 [1024];
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272
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322 Bytecount len;
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251
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323
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324 where_is_to_char (pgui_item->callback, buf2);
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325 len = strlen (buf2);
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326 if (len > buf_len)
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327 signal_too_long_error (pgui_item->name);
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328 strcpy (buf, buf2);
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329 return len;
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330 }
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331
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332 /* No keys - no right flush display */
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333 return 0;
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334 }
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335
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231
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336 #endif /* HAVE_POPUPS */
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337
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0
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338 void
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339 syms_of_gui (void)
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340 {
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341 defkeyword (&Q_active, ":active");
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342 defkeyword (&Q_suffix, ":suffix");
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343 defkeyword (&Q_keys, ":keys");
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321
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344 defkeyword (&Q_key_sequence,":key-sequence");
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0
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345 defkeyword (&Q_style, ":style");
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346 defkeyword (&Q_selected, ":selected");
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347 defkeyword (&Q_filter, ":filter");
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348 defkeyword (&Q_config, ":config");
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349 defkeyword (&Q_included, ":included");
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175
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350 defkeyword (&Q_accelerator, ":accelerator");
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321
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351 defkeyword (&Q_label, ":label");
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0
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352
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353 defsymbol (&Qtoggle, "toggle");
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354 defsymbol (&Qradio, "radio");
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231
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355
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356 #ifdef HAVE_POPUPS
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357 DEFSUBR (Fpopup_up_p);
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358 #endif
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0
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359 }
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360
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361 void
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362 vars_of_gui (void)
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363 {
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364 }
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