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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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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 #include <config.h>
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251
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26 #include "lisp.h"
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231
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27 #include "gui.h"
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0
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28
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29 Lisp_Object Q_active, Q_suffix, Q_keys, Q_style, Q_selected;
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30 Lisp_Object Q_filter, Q_config, Q_included;
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175
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31 Lisp_Object Q_accelerator;
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0
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32 Lisp_Object Qtoggle, Qradio;
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33
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231
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34 #ifdef HAVE_POPUPS
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35
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36 /* count of menus/dboxes currently up */
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37 int popup_up_p;
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38
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39 DEFUN ("popup-up-p", Fpopup_up_p, 0, 0, 0, /*
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40 Return t if a popup menu or dialog box is up, nil otherwise.
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41 See `popup-menu' and `popup-dialog-box'.
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42 */
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43 ())
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44 {
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45 return popup_up_p ? Qt : Qnil;
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46 }
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47
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48 int
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49 separator_string_p (CONST char *s)
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50 {
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51 CONST char *p;
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52 char first;
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53
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54 if (!s || s[0] == '\0')
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55 return 0;
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56 first = s[0];
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57 if (first != '-' && first != '=')
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58 return 0;
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59 for (p = s; *p == first; p++);
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60
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61 if (*p == '!' || *p == ':' || *p == '\0')
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62 return 1;
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63 return 0;
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64 }
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65
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251
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66 /*
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67 * Initialize the gui_item structure by setting all (GC-protected)
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68 * fields to their default values. The defaults are t for :active and
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69 * :included values, and nil for others.
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70 */
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71 void
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72 gui_item_init (struct gui_item *pgui_item)
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73 {
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74 pgui_item->name = Qnil;
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75 pgui_item->callback = Qnil;
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76 pgui_item->suffix = Qnil;
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77 pgui_item->active = Qt;
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78 pgui_item->included = Qt;
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79 pgui_item->config = Qunbound;
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80 pgui_item->filter = Qnil;
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81 pgui_item->style = Qnil;
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82 pgui_item->selected = Qnil;
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83 pgui_item->keys = Qnil;
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84 }
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85
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86 /*
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87 * Add a value VAL associated with keyword KEY into PGUI_ITEM
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88 * structure. If KEY is not a keyword, or is an unknown keyword, then
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89 * error is signaled.
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90 */
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91 void
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92 gui_item_add_keyval_pair (struct gui_item *pgui_item,
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93 Lisp_Object key, Lisp_Object val)
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94 {
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95 if (!KEYWORDP (key))
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96 error ("Not a keyword %S in gui item %S", key, pgui_item->name);
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97
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98 if (EQ (key, Q_suffix))
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99 pgui_item->suffix = val;
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100 else if (EQ (key, Q_active))
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101 pgui_item->active = val;
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102 else if (EQ (key, Q_included))
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103 pgui_item->included = val;
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104 else if (EQ (key, Q_config))
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105 pgui_item->config = val;
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106 else if (EQ (key, Q_filter))
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107 pgui_item->filter = val;
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108 else if (EQ (key, Q_style))
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109 pgui_item->style = val;
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110 else if (EQ (key, Q_selected))
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111 pgui_item->selected = val;
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112 else if (EQ (key, Q_keys))
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113 pgui_item->keys = val;
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114 else
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115 error ("Unknown keyword %S in gui item %S", key, pgui_item->name);
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116 }
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117
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118 /*
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119 * ITEM is a lisp vector, describing a menu item or a button. The
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120 * function extracts the description of the item into the PGUI_ITEM
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121 * structure.
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122 */
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123 void
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124 gui_parse_item_keywords (Lisp_Object item, struct gui_item *pgui_item)
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125 {
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126 int length, plist_p;
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127 Lisp_Object *contents;
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128
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129 CHECK_VECTOR (item);
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130 length = XVECTOR_LENGTH (item);
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131 contents = XVECTOR_DATA (item);
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132
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133 if (length < 3)
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134 signal_simple_error ("GUI item descriptors must be at least 3 elts long", item);
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135
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136 /* length 3: [ "name" callback active-p ]
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137 length 4: [ "name" callback active-p suffix ]
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138 or [ "name" callback keyword value ]
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139 length 5+: [ "name" callback [ keyword value ]+ ]
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140 */
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141 plist_p = (length >= 5 || KEYWORDP (contents [2]));
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142
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143 pgui_item->name = contents [0];
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144 pgui_item->callback = contents [1];
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145
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146 if (!plist_p)
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147 /* the old way */
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148 {
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149 pgui_item->active = contents [2];
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150 if (length == 4)
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151 pgui_item->suffix = contents [3];
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152 }
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153 else
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154 /* the new way */
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155 {
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156 int i;
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157 if (length & 1)
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158 signal_simple_error (
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159 "GUI item descriptor has an odd number of keywords and values",
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160 item);
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161
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162 for (i = 2; i < length;)
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163 {
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164 Lisp_Object key = contents [i++];
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165 Lisp_Object val = contents [i++];
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166 gui_item_add_keyval_pair (pgui_item, key, val);
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167 }
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168 }
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169 }
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170
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171 /*
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172 * Decide whether a GUI item is active by evaluating its :active form
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173 * if any
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174 */
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175 int
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176 gui_item_active_p (CONST struct gui_item *pgui_item)
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177 {
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178 /* This function can call lisp */
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179
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180 /* Shortcut to avoid evaluating Qt each time */
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181 return (EQ (pgui_item->active, Qt)
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182 || !NILP (Feval (pgui_item->active)));
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183 }
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184
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185 /*
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186 * Decide whether a GUI item is included by evaluating its :included
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187 * form if given, and testing its :config form against supplied CONFLIST
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188 * configuration variable
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189 */
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190 int
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191 gui_item_included_p (CONST struct gui_item *pgui_item, Lisp_Object conflist)
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192 {
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193 /* This function can call lisp */
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194
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195 /* Evaluate :included first. Shortcut to avoid evaluating Qt each time */
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196 if (!EQ (pgui_item->included, Qt)
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197 && NILP (Feval (pgui_item->included)))
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198 return 0;
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199
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200 /* Do :config if conflist is given */
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201 if (!NILP (conflist) && !NILP (pgui_item->config)
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202 && NILP (Fmemq (pgui_item->config, conflist)))
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203 return 0;
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204
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205 return 1;
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206 }
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207
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208 static DOESNT_RETURN
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209 signal_too_long_error (Lisp_Object name)
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210 {
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211 error ("GUI item %s produces too long displayable string", name);
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212 }
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213
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214 /*
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215 * Format "left flush" display portion of an item into BUF, guarded by
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216 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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217 * null character, so actual maximum size of buffer consumed is
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218 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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219 * signaled.
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220 * Return value is the offset to the terminating null character into the
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221 * buffer.
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222 */
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223 unsigned int
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224 gui_item_display_flush_left (CONST struct gui_item *pgui_item,
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225 char* buf, unsigned int buf_len)
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226 {
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227 unsigned int consumed;
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228
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229 /* Copy item name first */
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230 CHECK_STRING (pgui_item->name);
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231 if (XSTRING_LENGTH (pgui_item->name) > buf_len)
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232 signal_too_long_error (pgui_item->name);
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233 strcpy (buf, XSTRING_DATA (pgui_item->name));
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234 buf += (consumed = XSTRING_LENGTH (pgui_item->name));
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235 buf_len -= consumed;
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236
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237 /* Add space and suffix text, if there is a suffix */
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238 if (!NILP (pgui_item->suffix))
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239 {
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240 if (XSTRING_LENGTH (pgui_item->suffix) + 1 > buf_len)
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241 signal_too_long_error (pgui_item->name);
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242 *(buf++) = ' ';
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243 strcpy (buf, XSTRING_DATA (pgui_item->suffix));
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244 consumed += XSTRING_LENGTH (pgui_item->suffix) + 1;
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245 }
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246
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247 return consumed;
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248 }
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249
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250 /*
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251 * Format "right flush" display portion of an item into BUF, guarded by
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252 * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
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253 * null character, so actual maximum size of buffer consumed is
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254 * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
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255 * signaled.
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256 * Return value is the offset to the terminating null character into the
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257 * buffer.
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258 */
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259 unsigned int
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260 gui_item_display_flush_right (CONST struct gui_item *pgui_item,
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261 char* buf, unsigned int buf_len)
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262 {
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263 *buf = 0;
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264
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265 /* Have keys? */
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266 if (!menubar_show_keybindings)
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267 return 0;
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268
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269 /* Try :keys first */
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270 if (!NILP (pgui_item->keys))
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271 {
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272 CHECK_STRING (pgui_item->keys);
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273 if (XSTRING_LENGTH (pgui_item->keys) > buf_len)
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274 signal_too_long_error (pgui_item->name);
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275 strcpy (buf, XSTRING_DATA (pgui_item->keys));
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276 return XSTRING_LENGTH (pgui_item->keys);
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277 }
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278
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279 /* See if we can derive keys out of callback symbol */
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280 if (SYMBOLP (pgui_item->callback))
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281 {
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282 char buf2 [1024];
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283 unsigned int len;
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284
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285 where_is_to_char (pgui_item->callback, buf2);
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286 len = strlen (buf2);
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287 if (len > buf_len)
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288 signal_too_long_error (pgui_item->name);
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289 strcpy (buf, buf2);
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290 return len;
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291 }
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292
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293 /* No keys - no right flush display */
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294 return 0;
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295 }
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296
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231
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297 #endif /* HAVE_POPUPS */
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298
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0
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299 void
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300 syms_of_gui (void)
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301 {
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302 defkeyword (&Q_active, ":active");
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303 defkeyword (&Q_suffix, ":suffix");
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304 defkeyword (&Q_keys, ":keys");
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305 defkeyword (&Q_style, ":style");
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306 defkeyword (&Q_selected, ":selected");
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307 defkeyword (&Q_filter, ":filter");
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308 defkeyword (&Q_config, ":config");
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309 defkeyword (&Q_included, ":included");
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175
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310 defkeyword (&Q_accelerator, ":accelerator");
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0
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311
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312 defsymbol (&Qtoggle, "toggle");
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313 defsymbol (&Qradio, "radio");
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231
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314
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315 #ifdef HAVE_POPUPS
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316 DEFSUBR (Fpopup_up_p);
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317 #endif
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0
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318 }
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319
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320 void
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321 vars_of_gui (void)
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322 {
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323 }
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