1 | // |
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2 | // "$Id$" |
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3 | // |
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4 | // Menu utilities for the Fast Light Tool Kit (FLTK). |
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5 | // |
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6 | // Copyright 1998-2005 by Bill Spitzak and others. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or |
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9 | // modify it under the terms of the GNU Library General Public |
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10 | // License as published by the Free Software Foundation; either |
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11 | // version 2 of the License, or (at your option) any later version. |
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12 | // |
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13 | // This library is distributed in the hope that it will be useful, |
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14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | // Library General Public License for more details. |
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17 | // |
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18 | // You should have received a copy of the GNU Library General Public |
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19 | // License along with this library; if not, write to the Free Software |
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20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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21 | // USA. |
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22 | // |
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23 | // Please report all bugs and problems on the following page: |
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24 | // |
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25 | // http://www.fltk.org/str.php |
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26 | // |
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27 | |
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28 | // Methods to alter the menu in an Fl_Menu_ widget. |
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29 | |
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30 | // These are for Forms emulation and for dynamically changing the |
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31 | // menus. They are in this source file so they are not linked in if |
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32 | // not used, which is what will happen if the the program only uses |
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33 | // constant menu tables. |
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34 | |
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35 | // Not at all guaranteed to be Forms compatable, especially with any |
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36 | // string with a % sign in it! |
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37 | |
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38 | #include <FL/Fl_Menu_.H> |
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39 | #include "flstring.h" |
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40 | #include <stdio.h> |
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41 | #include <stdlib.h> |
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42 | |
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43 | // If the array is this, we will double-reallocate as necessary: |
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44 | static Fl_Menu_Item* local_array = 0; |
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45 | static int local_array_alloc = 0; // number allocated |
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46 | static int local_array_size = 0; // == size(local_array) |
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47 | extern Fl_Menu_* fl_menu_array_owner; // in Fl_Menu_.cxx |
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48 | |
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49 | // For historical reasons there are matching methods that work on a |
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50 | // user-allocated array of Fl_Menu_Item. These methods are quite |
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51 | // depreciated and should not be used. These old methods use the |
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52 | // above pointers to detect if the array belongs to an Fl_Menu_ |
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53 | // widget, and if so it reallocates as necessary. |
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54 | |
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55 | // Insert a single Fl_Menu_Item into an array of size at offset n, |
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56 | // if this is local_array it will be reallocated if needed. |
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57 | static Fl_Menu_Item* insert( |
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58 | Fl_Menu_Item* array, int size, |
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59 | int n, |
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60 | const char *text, |
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61 | int flags |
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62 | ) { |
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63 | if (array == local_array && size >= local_array_alloc) { |
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64 | local_array_alloc = 2*size; |
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65 | Fl_Menu_Item* newarray = new Fl_Menu_Item[local_array_alloc]; |
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66 | memmove(newarray, array, size*sizeof(Fl_Menu_Item)); |
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67 | delete[] local_array; |
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68 | local_array = array = newarray; |
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69 | } |
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70 | // move all the later items: |
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71 | memmove(array+n+1, array+n, sizeof(Fl_Menu_Item)*(size-n)); |
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72 | // create the new item: |
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73 | Fl_Menu_Item* m = array+n; |
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74 | m->text = text ? strdup(text) : 0; |
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75 | m->shortcut_ = 0; |
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76 | m->callback_ = 0; |
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77 | m->user_data_ = 0; |
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78 | m->flags = flags; |
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79 | m->labeltype_ = m->labelfont_ = m->labelsize_ = m->labelcolor_ = 0; |
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80 | return array; |
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81 | } |
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82 | |
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83 | // Comparison that does not care about deleted '&' signs: |
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84 | static int compare(const char* a, const char* b) { |
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85 | for (;;) { |
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86 | int n = *a-*b; |
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87 | if (n) { |
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88 | if (*a == '&') a++; |
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89 | else if (*b == '&') b++; |
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90 | else return n; |
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91 | } else if (*a) { |
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92 | a++; b++; |
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93 | } else { |
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94 | return 0; |
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95 | } |
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96 | } |
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97 | } |
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98 | |
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99 | // Add an item. The text is split at '/' characters to automatically |
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100 | // produce submenus (actually a totally unnecessary feature as you can |
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101 | // now add submenu titles directly by setting SUBMENU in the flags): |
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102 | int Fl_Menu_Item::add( |
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103 | const char *mytext, |
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104 | int sc, |
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105 | Fl_Callback *cb, |
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106 | void *data, |
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107 | int myflags |
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108 | ) { |
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109 | Fl_Menu_Item *array = this; |
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110 | Fl_Menu_Item *m = this; |
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111 | const char *p; |
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112 | char *q; |
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113 | char buf[1024]; |
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114 | |
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115 | int msize = array==local_array ? local_array_size : array->size(); |
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116 | int flags1 = 0; |
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117 | const char* item; |
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118 | |
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119 | // split at slashes to make submenus: |
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120 | for (;;) { |
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121 | |
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122 | // leading slash makes us assumme it is a filename: |
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123 | if (*mytext == '/') {item = mytext; break;} |
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124 | |
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125 | // leading underscore causes divider line: |
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126 | if (*mytext == '_') {mytext++; flags1 = FL_MENU_DIVIDER;} |
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127 | |
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128 | // copy to buf, changing \x to x: |
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129 | q = buf; |
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130 | for (p=mytext; *p && *p != '/'; *q++ = *p++) if (*p=='\\' && p[1]) p++; |
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131 | *q = 0; |
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132 | |
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133 | item = buf; |
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134 | if (*p != '/') break; /* not a menu title */ |
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135 | mytext = p+1; /* point at item title */ |
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136 | |
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137 | /* find a matching menu title: */ |
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138 | for (; m->text; m = m->next()) |
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139 | if (m->flags&FL_SUBMENU && !compare(item, m->text)) break; |
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140 | |
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141 | if (!m->text) { /* create a new menu */ |
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142 | int n = m-array; |
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143 | array = insert(array, msize, n, item, FL_SUBMENU|flags1); |
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144 | msize++; |
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145 | array = insert(array, msize, n+1, 0, 0); |
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146 | msize++; |
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147 | m = array+n; |
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148 | } |
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149 | m++; /* go into the submenu */ |
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150 | flags1 = 0; |
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151 | } |
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152 | |
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153 | /* find a matching menu item: */ |
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154 | for (; m->text; m = m->next()) |
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155 | if (!(m->flags&FL_SUBMENU) && !compare(m->text,item)) break; |
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156 | |
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157 | if (!m->text) { /* add a new menu item */ |
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158 | int n = m-array; |
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159 | array = insert(array, msize, n, item, myflags|flags1); |
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160 | msize++; |
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161 | if (myflags & FL_SUBMENU) { // add submenu delimiter |
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162 | array = insert(array, msize, n+1, 0, 0); |
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163 | msize++; |
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164 | } |
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165 | m = array+n; |
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166 | } |
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167 | |
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168 | /* fill it in */ |
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169 | m->shortcut_ = sc; |
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170 | m->callback_ = cb; |
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171 | m->user_data_ = data; |
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172 | m->flags = myflags|flags1; |
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173 | |
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174 | if (array == local_array) local_array_size = msize; |
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175 | return m-array; |
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176 | } |
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177 | |
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178 | int Fl_Menu_::add(const char *t, int s, Fl_Callback *c,void *v,int f) { |
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179 | // make this widget own the local array: |
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180 | if (this != fl_menu_array_owner) { |
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181 | if (fl_menu_array_owner) { |
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182 | Fl_Menu_* o = fl_menu_array_owner; |
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183 | // the previous owner get's its own correctly-sized array: |
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184 | int value_offset = o->value_-local_array; |
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185 | int n = local_array_size; |
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186 | Fl_Menu_Item* newMenu = o->menu_ = new Fl_Menu_Item[n]; |
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187 | memcpy(newMenu, local_array, n*sizeof(Fl_Menu_Item)); |
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188 | if (o->value_) o->value_ = newMenu+value_offset; |
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189 | } |
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190 | if (menu_) { |
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191 | // this already has a menu array, use it as the local one: |
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192 | delete[] local_array; |
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193 | if (!alloc) copy(menu_); // duplicate a user-provided static array |
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194 | // add to the menu's current array: |
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195 | local_array_alloc = local_array_size = size(); |
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196 | local_array = menu_; |
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197 | } else { |
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198 | // start with a blank array: |
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199 | alloc = 2; // indicates that the strings can be freed |
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200 | if (local_array) { |
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201 | menu_ = local_array; |
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202 | } else { |
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203 | local_array_alloc = 15; |
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204 | local_array = menu_ = new Fl_Menu_Item[local_array_alloc]; |
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205 | memset(local_array, 0, sizeof(Fl_Menu_Item) * local_array_alloc); |
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206 | } |
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207 | memset(menu_, 0, sizeof(Fl_Menu_Item)); |
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208 | local_array_size = 1; |
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209 | } |
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210 | fl_menu_array_owner = this; |
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211 | } |
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212 | int r = menu_->add(t,s,c,v,f); |
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213 | // if it rellocated array we must fix the pointer: |
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214 | int value_offset = value_-menu_; |
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215 | menu_ = local_array; // in case it reallocated it |
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216 | if (value_) value_ = menu_+value_offset; |
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217 | return r; |
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218 | } |
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219 | |
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220 | // This is a Forms (and SGI GL library) compatable add function, it |
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221 | // adds many menu items, with '|' seperating the menu items, and tab |
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222 | // seperating the menu item names from an optional shortcut string. |
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223 | int Fl_Menu_::add(const char *str) { |
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224 | char buf[1024]; |
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225 | int r = 0; |
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226 | while (*str) { |
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227 | int sc = 0; |
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228 | char *c; |
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229 | for (c = buf; c < (buf + sizeof(buf) - 2) && *str && *str != '|'; str++) { |
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230 | if (*str == '\t') {*c++ = 0; sc = fl_old_shortcut(str);} |
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231 | else *c++ = *str; |
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232 | } |
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233 | *c = 0; |
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234 | r = add(buf, sc, 0, 0, 0); |
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235 | if (*str) str++; |
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236 | } |
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237 | return r; |
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238 | } |
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239 | |
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240 | void Fl_Menu_::replace(int i, const char *str) { |
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241 | if (i<0 || i>=size()) return; |
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242 | if (!alloc) copy(menu_); |
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243 | if (alloc > 1) { |
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244 | free((void *)menu_[i].text); |
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245 | str = strdup(str); |
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246 | } |
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247 | menu_[i].text = str; |
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248 | } |
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249 | |
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250 | void Fl_Menu_::remove(int i) { |
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251 | int n = size(); |
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252 | if (i<0 || i>=n) return; |
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253 | if (!alloc) copy(menu_); |
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254 | // find the next item, skipping submenus: |
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255 | Fl_Menu_Item* item = menu_+i; |
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256 | const Fl_Menu_Item* next_item = item->next(); |
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257 | // delete the text only if all items were created with add(): |
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258 | if (alloc > 1) { |
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259 | for (Fl_Menu_Item* m = item; m < next_item; m++) |
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260 | if (m->text) free((void*)(m->text)); |
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261 | } |
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262 | // MRS: "n" is the menu size(), which includes the trailing NULL entry... |
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263 | memmove(item, next_item, (menu_+n-next_item)*sizeof(Fl_Menu_Item)); |
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264 | } |
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265 | |
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266 | // |
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267 | // End of "$Id$". |
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268 | // |
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