| File: | MenuButton.c |
| Location: | line 223, column 2 |
| Description: | Dereference of null pointer |
| 1 | /* | |||||
| 2 | Copyright 1989, 1994, 1998 The Open Group | |||||
| 3 | ||||||
| 4 | Permission to use, copy, modify, distribute, and sell this software and its | |||||
| 5 | documentation for any purpose is hereby granted without fee, provided that | |||||
| 6 | the above copyright notice appear in all copies and that both that | |||||
| 7 | copyright notice and this permission notice appear in supporting | |||||
| 8 | documentation. | |||||
| 9 | ||||||
| 10 | The above copyright notice and this permission notice shall be included in | |||||
| 11 | all copies or substantial portions of the Software. | |||||
| 12 | ||||||
| 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||||
| 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||||
| 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||||
| 16 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |||||
| 17 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |||||
| 18 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |||||
| 19 | ||||||
| 20 | Except as contained in this notice, the name of The Open Group shall not be | |||||
| 21 | used in advertising or otherwise to promote the sale, use or other dealings | |||||
| 22 | in this Software without prior written authorization from The Open Group. | |||||
| 23 | * | |||||
| 24 | */ | |||||
| 25 | ||||||
| 26 | /* | |||||
| 27 | * MenuButton.c - Source code for MenuButton widget. | |||||
| 28 | * | |||||
| 29 | * This is the source code for the Athena MenuButton widget. | |||||
| 30 | * It is intended to provide an easy method of activating pulldown menus. | |||||
| 31 | * | |||||
| 32 | * Date: May 2, 1989 | |||||
| 33 | * | |||||
| 34 | * By: Chris D. Peterson | |||||
| 35 | * MIT X Consortium | |||||
| 36 | * kit@expo.lcs.mit.edu | |||||
| 37 | */ | |||||
| 38 | ||||||
| 39 | #ifdef HAVE_CONFIG_H1 | |||||
| 40 | #include <config.h> | |||||
| 41 | #endif | |||||
| 42 | #include <stdio.h> | |||||
| 43 | #include <X11/IntrinsicP.h> | |||||
| 44 | #include <X11/StringDefs.h> | |||||
| 45 | #include <X11/Xaw/MenuButtoP.h> | |||||
| 46 | #include <X11/Xaw/XawInit.h> | |||||
| 47 | #include "Private.h" | |||||
| 48 | ||||||
| 49 | /* | |||||
| 50 | * Class Methods | |||||
| 51 | */ | |||||
| 52 | static void XawMenuButtonClassInitialize(void); | |||||
| 53 | static void XawMenuButtonInitialize(Widget, Widget, ArgList, Cardinal*); | |||||
| 54 | static void XawMenuButtonDestroy(Widget); | |||||
| 55 | static Boolean XawMenuButtonSetValues(Widget, Widget, Widget, ArgList, Cardinal*); | |||||
| 56 | ||||||
| 57 | /* | |||||
| 58 | * Actions | |||||
| 59 | */ | |||||
| 60 | static void PopupMenu(Widget, XEvent*, String*, Cardinal*); | |||||
| 61 | ||||||
| 62 | /* | |||||
| 63 | * Initialization | |||||
| 64 | */ | |||||
| 65 | #define superclass((CommandWidgetClass)&commandClassRec) ((CommandWidgetClass)&commandClassRec) | |||||
| 66 | ||||||
| 67 | static char defaultTranslations[] = | |||||
| 68 | "<Enter>:" "highlight()\n" | |||||
| 69 | "<Leave>:" "reset()\n" | |||||
| 70 | "Any<BtnDown>:" "reset() PopupMenu()\n"; | |||||
| 71 | ||||||
| 72 | static char default_menu_name[] = "menu"; | |||||
| 73 | ||||||
| 74 | #define offset(field) XtOffsetOf(MenuButtonRec, field)__builtin_offsetof(MenuButtonRec, field) | |||||
| 75 | static XtResource resources[] = { | |||||
| 76 | { | |||||
| 77 | XtNmenuName"menuName", | |||||
| 78 | XtCMenuName"MenuName", | |||||
| 79 | XtRString((char*)&XtStrings[1797]), | |||||
| 80 | sizeof(String), | |||||
| 81 | offset(menu_button.menu_name), | |||||
| 82 | XtRString((char*)&XtStrings[1797]), | |||||
| 83 | (XtPointer)default_menu_name | |||||
| 84 | }, | |||||
| 85 | }; | |||||
| 86 | #undef offset | |||||
| 87 | ||||||
| 88 | static XtActionsRec actionsList[] = | |||||
| 89 | { | |||||
| 90 | {"PopupMenu", PopupMenu}, | |||||
| 91 | }; | |||||
| 92 | ||||||
| 93 | MenuButtonClassRec menuButtonClassRec = { | |||||
| 94 | /* core */ | |||||
| 95 | { | |||||
| 96 | (WidgetClass)superclass((CommandWidgetClass)&commandClassRec), /* superclass */ | |||||
| 97 | "MenuButton", /* class_name */ | |||||
| 98 | sizeof(MenuButtonRec), /* size */ | |||||
| 99 | XawMenuButtonClassInitialize, /* class_initialize */ | |||||
| 100 | NULL((void*)0), /* class_part_initialize */ | |||||
| 101 | False0, /* class_inited */ | |||||
| 102 | XawMenuButtonInitialize, /* initialize */ | |||||
| 103 | NULL((void*)0), /* initialize_hook */ | |||||
| 104 | XtInheritRealize((XtRealizeProc) _XtInherit), /* realize */ | |||||
| 105 | actionsList, /* actions */ | |||||
| 106 | XtNumber(actionsList)((Cardinal) (sizeof(actionsList) / sizeof(actionsList[0]))), /* num_actions */ | |||||
| 107 | resources, /* resources */ | |||||
| 108 | XtNumber(resources)((Cardinal) (sizeof(resources) / sizeof(resources[0]))), /* num_resources */ | |||||
| 109 | NULLQUARK((XrmQuark) 0), /* xrm_class */ | |||||
| 110 | False0, /* compress_motion */ | |||||
| 111 | True1, /* compress_exposure */ | |||||
| 112 | True1, /* compress_enterleave */ | |||||
| 113 | False0, /* visible_interest */ | |||||
| 114 | XawMenuButtonDestroy, /* destroy */ | |||||
| 115 | XtInheritResize((XtWidgetProc) _XtInherit), /* resize */ | |||||
| 116 | XtInheritExpose((XtExposeProc) _XtInherit), /* expose */ | |||||
| 117 | XawMenuButtonSetValues, /* set_values */ | |||||
| 118 | NULL((void*)0), /* set_values_hook */ | |||||
| 119 | XtInheritSetValuesAlmost((XtAlmostProc) _XtInherit), /* set_values_almost */ | |||||
| 120 | NULL((void*)0), /* get_values_hook */ | |||||
| 121 | NULL((void*)0), /* accept_focus */ | |||||
| 122 | XtVersion(11 * 1000 + 6), /* version */ | |||||
| 123 | NULL((void*)0), /* callback_private */ | |||||
| 124 | defaultTranslations, /* tm_table */ | |||||
| 125 | XtInheritQueryGeometry((XtGeometryHandler) _XtInherit), /* query_geometry */ | |||||
| 126 | XtInheritDisplayAccelerator((XtStringProc) _XtInherit), /* display_accelerator */ | |||||
| 127 | NULL((void*)0), /* extension */ | |||||
| 128 | }, | |||||
| 129 | /* simple */ | |||||
| 130 | { | |||||
| 131 | XtInheritChangeSensitive((int (*)(Widget))_XtInherit) /* change_sensitive */ | |||||
| 132 | }, | |||||
| 133 | /* label */ | |||||
| 134 | { | |||||
| 135 | NULL((void*)0), /* extension */ | |||||
| 136 | }, | |||||
| 137 | /* command */ | |||||
| 138 | { | |||||
| 139 | NULL((void*)0), /* extension */ | |||||
| 140 | }, | |||||
| 141 | /* menu_button */ | |||||
| 142 | { | |||||
| 143 | NULL((void*)0), /* extension */ | |||||
| 144 | }, | |||||
| 145 | }; | |||||
| 146 | ||||||
| 147 | WidgetClass menuButtonWidgetClass = (WidgetClass)&menuButtonClassRec; | |||||
| 148 | ||||||
| 149 | /* | |||||
| 150 | * Implementation | |||||
| 151 | */ | |||||
| 152 | static void | |||||
| 153 | XawMenuButtonClassInitialize(void) | |||||
| 154 | { | |||||
| 155 | XawInitializeWidgetSet(); | |||||
| 156 | XtRegisterGrabAction(PopupMenu, True1, | |||||
| 157 | ButtonPressMask(1L<<2) | ButtonReleaseMask(1L<<3), | |||||
| 158 | GrabModeAsync1, GrabModeAsync1); | |||||
| 159 | } | |||||
| 160 | ||||||
| 161 | /*ARGSUSED*/ | |||||
| 162 | static void | |||||
| 163 | XawMenuButtonInitialize(Widget request, Widget cnew, | |||||
| 164 | ArgList args, Cardinal *num_args) | |||||
| 165 | { | |||||
| 166 | MenuButtonWidget mbw = (MenuButtonWidget)cnew; | |||||
| 167 | ||||||
| 168 | if (mbw->menu_button.menu_name != default_menu_name) | |||||
| 169 | mbw->menu_button.menu_name = XtNewString(mbw->menu_button.menu_name)((mbw->menu_button.menu_name) != ((void*)0) ? (__builtin___strcpy_chk (XtMalloc((unsigned)strlen(mbw->menu_button.menu_name) + 1 ), mbw->menu_button.menu_name, __builtin_object_size (XtMalloc ((unsigned)strlen(mbw->menu_button.menu_name) + 1), 2 > 1 ? 1 : 0))) : ((void*)0)); | |||||
| 170 | } | |||||
| 171 | ||||||
| 172 | static void | |||||
| 173 | XawMenuButtonDestroy(Widget w) | |||||
| 174 | { | |||||
| 175 | MenuButtonWidget mbw = (MenuButtonWidget)w; | |||||
| 176 | ||||||
| 177 | if (mbw->menu_button.menu_name != default_menu_name) | |||||
| 178 | XtFree(mbw->menu_button.menu_name); | |||||
| 179 | } | |||||
| 180 | ||||||
| 181 | /*ARGSUSED*/ | |||||
| 182 | static Boolean | |||||
| 183 | XawMenuButtonSetValues(Widget current, Widget request, Widget cnew, | |||||
| 184 | ArgList args, Cardinal *num_args) | |||||
| 185 | { | |||||
| 186 | MenuButtonWidget mbw_old = (MenuButtonWidget)current; | |||||
| 187 | MenuButtonWidget mbw_new = (MenuButtonWidget)cnew; | |||||
| 188 | ||||||
| 189 | if (mbw_old->menu_button.menu_name != mbw_new->menu_button.menu_name) { | |||||
| 190 | if (mbw_old->menu_button.menu_name != default_menu_name) | |||||
| 191 | XtFree(mbw_old->menu_button.menu_name); | |||||
| 192 | if (mbw_new->menu_button.menu_name != default_menu_name) | |||||
| 193 | mbw_new->menu_button.menu_name = | |||||
| 194 | XtNewString(mbw_new->menu_button.menu_name)((mbw_new->menu_button.menu_name) != ((void*)0) ? (__builtin___strcpy_chk (XtMalloc((unsigned)strlen(mbw_new->menu_button.menu_name ) + 1), mbw_new->menu_button.menu_name, __builtin_object_size (XtMalloc((unsigned)strlen(mbw_new->menu_button.menu_name ) + 1), 2 > 1 ? 1 : 0))) : ((void*)0)); | |||||
| 195 | } | |||||
| 196 | ||||||
| 197 | return (False0); | |||||
| 198 | } | |||||
| 199 | ||||||
| 200 | /*ARGSUSED*/ | |||||
| 201 | static void | |||||
| 202 | PopupMenu(Widget w, XEvent *event, String *params, Cardinal *num_params) | |||||
| 203 | { | |||||
| 204 | MenuButtonWidget mbw = (MenuButtonWidget)w; | |||||
| ||||||
| 205 | Widget menu = NULL((void*)0), temp; | |||||
| 206 | Arg arglist[2]; | |||||
| 207 | Cardinal num_args; | |||||
| 208 | int menu_x, menu_y, menu_width, menu_height, button_height; | |||||
| 209 | Position button_x, button_y; | |||||
| 210 | ||||||
| 211 | temp = w; | |||||
| 212 | while(temp != NULL((void*)0)) { | |||||
| 213 | menu = XtNameToWidget(temp, mbw->menu_button.menu_name); | |||||
| 214 | if (menu == NULL((void*)0)) | |||||
| 215 | temp = XtParent(temp)((temp)->core.parent); | |||||
| 216 | else | |||||
| 217 | break; | |||||
| 218 | } | |||||
| 219 | ||||||
| 220 | if (menu == NULL((void*)0)) { | |||||
| 221 | char error_buf[BUFSIZ1024]; | |||||
| 222 | ||||||
| 223 | snprintf(error_buf, sizeof(error_buf),__builtin___snprintf_chk (error_buf, sizeof(error_buf), 0, __builtin_object_size (error_buf, 2 > 1 ? 1 : 0), "MenuButton: Could not find menu widget named %s." , mbw->menu_button.menu_name) | |||||
| ||||||
| 224 | "MenuButton: Could not find menu widget named %s.",__builtin___snprintf_chk (error_buf, sizeof(error_buf), 0, __builtin_object_size (error_buf, 2 > 1 ? 1 : 0), "MenuButton: Could not find menu widget named %s." , mbw->menu_button.menu_name) | |||||
| 225 | mbw->menu_button.menu_name)__builtin___snprintf_chk (error_buf, sizeof(error_buf), 0, __builtin_object_size (error_buf, 2 > 1 ? 1 : 0), "MenuButton: Could not find menu widget named %s." , mbw->menu_button.menu_name); | |||||
| 226 | XtAppWarning(XtWidgetToApplicationContext(w), error_buf); | |||||
| 227 | return; | |||||
| 228 | } | |||||
| 229 | ||||||
| 230 | if (!XtIsRealized(menu)(XtWindowOfObject(menu) != 0L)) | |||||
| 231 | XtRealizeWidget(menu); | |||||
| 232 | ||||||
| 233 | menu_width = XtWidth(menu)(((RectObj)menu)->rectangle.width) + (XtBorderWidth(menu)(((RectObj)menu)->rectangle.border_width) << 1); | |||||
| 234 | button_height = XtHeight(w)(((RectObj)w)->rectangle.height) + (XtBorderWidth(w)(((RectObj)w)->rectangle.border_width) << 1); | |||||
| 235 | menu_height = XtHeight(menu)(((RectObj)menu)->rectangle.height) + (XtBorderWidth(menu)(((RectObj)menu)->rectangle.border_width) << 1); | |||||
| 236 | ||||||
| 237 | XtTranslateCoords(w, 0, 0, &button_x, &button_y); | |||||
| 238 | menu_x = button_x; | |||||
| 239 | menu_y = button_y + button_height; | |||||
| 240 | ||||||
| 241 | if (menu_y >= 0) { | |||||
| 242 | int scr_height = HeightOfScreen(XtScreen(menu))((((menu)->core.screen))->height); | |||||
| 243 | ||||||
| 244 | if (menu_y + menu_height > scr_height) | |||||
| 245 | menu_y = button_y - menu_height; | |||||
| 246 | if (menu_y < 0) { | |||||
| 247 | menu_y = scr_height - menu_height; | |||||
| 248 | menu_x = button_x + XtWidth(w)(((RectObj)w)->rectangle.width) + (XtBorderWidth(w)(((RectObj)w)->rectangle.border_width) << 1); | |||||
| 249 | if (menu_x + menu_width > WidthOfScreen(XtScreen(menu))((((menu)->core.screen))->width)) | |||||
| 250 | menu_x = button_x - menu_width; | |||||
| 251 | } | |||||
| 252 | } | |||||
| 253 | if (menu_y < 0) | |||||
| 254 | menu_y = 0; | |||||
| 255 | ||||||
| 256 | if (menu_x >= 0) { | |||||
| 257 | int scr_width = WidthOfScreen(XtScreen(menu))((((menu)->core.screen))->width); | |||||
| 258 | ||||||
| 259 | if (menu_x + menu_width > scr_width) | |||||
| 260 | menu_x = scr_width - menu_width; | |||||
| 261 | } | |||||
| 262 | if (menu_x < 0) | |||||
| 263 | menu_x = 0; | |||||
| 264 | ||||||
| 265 | num_args = 0; | |||||
| 266 | XtSetArg(arglist[num_args], XtNx, menu_x)((void)( (arglist[num_args]).name = (((char*)&XtStrings[885 ])), (arglist[num_args]).value = (XtArgVal)(menu_x) )); num_args++; | |||||
| 267 | XtSetArg(arglist[num_args], XtNy, menu_y)((void)( (arglist[num_args]).name = (((char*)&XtStrings[887 ])), (arglist[num_args]).value = (XtArgVal)(menu_y) )); num_args++; | |||||
| 268 | XtSetValues(menu, arglist, num_args); | |||||
| 269 | ||||||
| 270 | XtPopupSpringLoaded(menu); | |||||
| 271 | } |