| File: | MenuButton.c |
| Location: | line 180, column 12 |
| Description: | Dereference of null pointer |
| 1 | /* | |||||
| 2 | Copyright (c) 1989, 1994 X Consortium | |||||
| 3 | ||||||
| 4 | Permission is hereby granted, free of charge, to any person obtaining a copy | |||||
| 5 | of this software and associated documentation files (the "Software"), to deal | |||||
| 6 | in the Software without restriction, including without limitation the rights | |||||
| 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |||||
| 8 | copies of the Software, and to permit persons to whom the Software is | |||||
| 9 | furnished to do so, subject to the following conditions: | |||||
| 10 | ||||||
| 11 | The above copyright notice and this permission notice shall be included in | |||||
| 12 | all copies or substantial portions of the Software. | |||||
| 13 | ||||||
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||||
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||||
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||||
| 17 | X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |||||
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |||||
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |||||
| 20 | ||||||
| 21 | Except as contained in this notice, the name of the X Consortium shall not be | |||||
| 22 | used in advertising or otherwise to promote the sale, use or other dealings | |||||
| 23 | in this Software without prior written authorization from the X Consortium. | |||||
| 24 | * | |||||
| 25 | */ | |||||
| 26 | ||||||
| 27 | ||||||
| 28 | /*********************************************************************** | |||||
| 29 | * | |||||
| 30 | * MenuButton Widget | |||||
| 31 | * | |||||
| 32 | ***********************************************************************/ | |||||
| 33 | ||||||
| 34 | /* | |||||
| 35 | * MenuButton.c - Source code for MenuButton widget. | |||||
| 36 | * | |||||
| 37 | * This is the source code for the Athena MenuButton widget. | |||||
| 38 | * It is intended to provide an easy method of activating pulldown menus. | |||||
| 39 | * | |||||
| 40 | * Date: May 2, 1989 | |||||
| 41 | * | |||||
| 42 | * By: Chris D. Peterson | |||||
| 43 | * MIT X Consortium | |||||
| 44 | * kit@expo.lcs.mit.edu | |||||
| 45 | */ | |||||
| 46 | ||||||
| 47 | #ifdef HAVE_CONFIG_H1 | |||||
| 48 | #include "config.h" | |||||
| 49 | #endif | |||||
| 50 | #include <stdio.h> | |||||
| 51 | #include <X11/IntrinsicP.h> | |||||
| 52 | #include <X11/StringDefs.h> | |||||
| 53 | ||||||
| 54 | #include <X11/Xaw3d/XawInit.h> | |||||
| 55 | #include <X11/Xaw3d/MenuButtoP.h> | |||||
| 56 | ||||||
| 57 | static void ClassInitialize(void); | |||||
| 58 | static void PopupMenu(Widget, XEvent *, String *, Cardinal *); | |||||
| 59 | ||||||
| 60 | #define superclass((CommandWidgetClass)&commandClassRec) ((CommandWidgetClass)&commandClassRec) | |||||
| 61 | ||||||
| 62 | static char defaultTranslations[] = | |||||
| 63 | "<EnterWindow>: highlight()\n\ | |||||
| 64 | <LeaveWindow>: reset()\n\ | |||||
| 65 | Any<BtnDown>: reset() PopupMenu()"; | |||||
| 66 | ||||||
| 67 | /**************************************************************** | |||||
| 68 | * | |||||
| 69 | * Full class record constant | |||||
| 70 | * | |||||
| 71 | ****************************************************************/ | |||||
| 72 | ||||||
| 73 | /* Private Data */ | |||||
| 74 | ||||||
| 75 | #define offset(field) XtOffsetOf(MenuButtonRec, field)__builtin_offsetof(MenuButtonRec, field) | |||||
| 76 | static XtResource resources[] = { | |||||
| 77 | { | |||||
| 78 | XtNmenuName"menuName", XtCMenuName"MenuName", XtRString((char*)&XtStrings[1797]), sizeof(String), | |||||
| 79 | offset(menu_button.menu_name), XtRString((char*)&XtStrings[1797]), (XtPointer)"menu"}, | |||||
| 80 | }; | |||||
| 81 | #undef offset | |||||
| 82 | ||||||
| 83 | static XtActionsRec actionsList[] = | |||||
| 84 | { | |||||
| 85 | {"PopupMenu", PopupMenu} | |||||
| 86 | }; | |||||
| 87 | ||||||
| 88 | MenuButtonClassRec menuButtonClassRec = { | |||||
| 89 | { | |||||
| 90 | (WidgetClass) superclass((CommandWidgetClass)&commandClassRec), /* superclass */ | |||||
| 91 | "MenuButton", /* class_name */ | |||||
| 92 | sizeof(MenuButtonRec), /* size */ | |||||
| 93 | ClassInitialize, /* class_initialize */ | |||||
| 94 | NULL((void*)0), /* class_part_initialize */ | |||||
| 95 | FALSE0, /* class_inited */ | |||||
| 96 | NULL((void*)0), /* initialize */ | |||||
| 97 | NULL((void*)0), /* initialize_hook */ | |||||
| 98 | XtInheritRealize((XtRealizeProc) _XtInherit), /* realize */ | |||||
| 99 | actionsList, /* actions */ | |||||
| 100 | XtNumber(actionsList)((Cardinal) (sizeof(actionsList) / sizeof(actionsList[0]))), /* num_actions */ | |||||
| 101 | resources, /* resources */ | |||||
| 102 | XtNumber(resources)((Cardinal) (sizeof(resources) / sizeof(resources[0]))), /* resource_count */ | |||||
| 103 | NULLQUARK((XrmQuark) 0), /* xrm_class */ | |||||
| 104 | FALSE0, /* compress_motion */ | |||||
| 105 | TRUE1, /* compress_exposure */ | |||||
| 106 | TRUE1, /* compress_enterleave */ | |||||
| 107 | FALSE0, /* visible_interest */ | |||||
| 108 | NULL((void*)0), /* destroy */ | |||||
| 109 | XtInheritResize((XtWidgetProc) _XtInherit), /* resize */ | |||||
| 110 | XtInheritExpose((XtExposeProc) _XtInherit), /* expose */ | |||||
| 111 | NULL((void*)0), /* set_values */ | |||||
| 112 | NULL((void*)0), /* set_values_hook */ | |||||
| 113 | XtInheritSetValuesAlmost((XtAlmostProc) _XtInherit), /* set_values_almost */ | |||||
| 114 | NULL((void*)0), /* get_values_hook */ | |||||
| 115 | NULL((void*)0), /* accept_focus */ | |||||
| 116 | XtVersion(11 * 1000 + 6), /* version */ | |||||
| 117 | NULL((void*)0), /* callback_private */ | |||||
| 118 | defaultTranslations, /* tm_table */ | |||||
| 119 | XtInheritQueryGeometry((XtGeometryHandler) _XtInherit), /* query_geometry */ | |||||
| 120 | XtInheritDisplayAccelerator((XtStringProc) _XtInherit), /* display_accelerator */ | |||||
| 121 | NULL((void*)0) /* extension */ | |||||
| 122 | }, /* CoreClass fields initialization */ | |||||
| 123 | { | |||||
| 124 | XtInheritChangeSensitive((Boolean (*)(Widget))_XtInherit) /* change_sensitive */ | |||||
| 125 | }, /* SimpleClass fields initialization */ | |||||
| 126 | { | |||||
| 127 | XtInheritXaw3dShadowDraw((void (*)(Widget, XEvent *, Region, XtRelief, Boolean))_XtInherit ), /* shadowdraw */ | |||||
| 128 | }, /* ThreeDClass fields initialization */ | |||||
| 129 | { | |||||
| 130 | 0, /* field not used */ | |||||
| 131 | }, /* LabelClass fields initialization */ | |||||
| 132 | { | |||||
| 133 | 0, /* field not used */ | |||||
| 134 | }, /* CommandClass fields initialization */ | |||||
| 135 | { | |||||
| 136 | 0, /* field not used */ | |||||
| 137 | } /* MenuButtonClass fields initialization */ | |||||
| 138 | }; | |||||
| 139 | ||||||
| 140 | /* for public consumption */ | |||||
| 141 | WidgetClass menuButtonWidgetClass = (WidgetClass) &menuButtonClassRec; | |||||
| 142 | ||||||
| 143 | /**************************************************************** | |||||
| 144 | * | |||||
| 145 | * Private Procedures | |||||
| 146 | * | |||||
| 147 | ****************************************************************/ | |||||
| 148 | ||||||
| 149 | static void | |||||
| 150 | ClassInitialize(void) | |||||
| 151 | { | |||||
| 152 | XawInitializeWidgetSet(); | |||||
| 153 | XtRegisterGrabAction(PopupMenu, True1, | |||||
| 154 | (unsigned int)(ButtonPressMask(1L<<2) | ButtonReleaseMask(1L<<3)), | |||||
| 155 | GrabModeAsync1, GrabModeAsync1); | |||||
| 156 | } | |||||
| 157 | ||||||
| 158 | /* ARGSUSED */ | |||||
| 159 | static void | |||||
| 160 | PopupMenu(Widget w, XEvent *event, String *params, Cardinal *num_params) | |||||
| 161 | { | |||||
| 162 | MenuButtonWidget mbw = (MenuButtonWidget) w; | |||||
| ||||||
| 163 | Widget menu = NULL((void*)0), temp; | |||||
| 164 | Arg arglist[2]; | |||||
| 165 | Cardinal num_args; | |||||
| 166 | int menu_x, menu_y, menu_width, menu_height, button_height; | |||||
| 167 | Position button_x, button_y; | |||||
| 168 | ||||||
| 169 | temp = w; | |||||
| 170 | while(temp != NULL((void*)0)) { | |||||
| 171 | menu = XtNameToWidget(temp, mbw->menu_button.menu_name); | |||||
| 172 | if (menu == NULL((void*)0)) | |||||
| 173 | temp = XtParent(temp)((temp)->core.parent); | |||||
| 174 | else | |||||
| 175 | break; | |||||
| 176 | } | |||||
| 177 | ||||||
| 178 | if (menu == NULL((void*)0)) { | |||||
| 179 | char error_buf[BUFSIZ1024]; | |||||
| 180 | (void) sprintf(error_buf, "MenuButton: %s %s.",__builtin___sprintf_chk (error_buf, 0, __builtin_object_size ( error_buf, 2 > 1 ? 1 : 0), "MenuButton: %s %s.", "Could not find menu widget named" , mbw->menu_button.menu_name) | |||||
| ||||||
| 181 | "Could not find menu widget named", mbw->menu_button.menu_name)__builtin___sprintf_chk (error_buf, 0, __builtin_object_size ( error_buf, 2 > 1 ? 1 : 0), "MenuButton: %s %s.", "Could not find menu widget named" , mbw->menu_button.menu_name); | |||||
| 182 | XtAppWarning(XtWidgetToApplicationContext(w), error_buf); | |||||
| 183 | return; | |||||
| 184 | } | |||||
| 185 | if (!XtIsRealized(menu)(XtWindowOfObject(menu) != 0L)) | |||||
| 186 | XtRealizeWidget(menu); | |||||
| 187 | ||||||
| 188 | menu_width = menu->core.width + 2 * menu->core.border_width; | |||||
| 189 | button_height = w->core.height + 2 * w->core.border_width; | |||||
| 190 | menu_height = menu->core.height + 2 * menu->core.border_width; | |||||
| 191 | ||||||
| 192 | XtTranslateCoords(w, 0, 0, &button_x, &button_y); | |||||
| 193 | menu_x = button_x; | |||||
| 194 | menu_y = button_y + button_height; | |||||
| 195 | ||||||
| 196 | if (menu_x >= 0) { | |||||
| 197 | int scr_width = WidthOfScreen(XtScreen(menu))((((menu)->core.screen))->width); | |||||
| 198 | if (menu_x + menu_width > scr_width) | |||||
| 199 | menu_x = scr_width - menu_width; | |||||
| 200 | } | |||||
| 201 | if (menu_x < 0) | |||||
| 202 | menu_x = 0; | |||||
| 203 | ||||||
| 204 | if (menu_y >= 0) { | |||||
| 205 | int scr_height = HeightOfScreen(XtScreen(menu))((((menu)->core.screen))->height); | |||||
| 206 | if (menu_y + menu_height > scr_height) | |||||
| 207 | menu_y = scr_height - menu_height; | |||||
| 208 | } | |||||
| 209 | if (menu_y < 0) | |||||
| 210 | menu_y = 0; | |||||
| 211 | ||||||
| 212 | num_args = 0; | |||||
| 213 | XtSetArg(arglist[num_args], XtNx, menu_x)((void)( (arglist[num_args]).name = (((char*)&XtStrings[885 ])), (arglist[num_args]).value = (XtArgVal)(menu_x) )); num_args++; | |||||
| 214 | XtSetArg(arglist[num_args], XtNy, menu_y)((void)( (arglist[num_args]).name = (((char*)&XtStrings[887 ])), (arglist[num_args]).value = (XtArgVal)(menu_y) )); num_args++; | |||||
| 215 | XtSetValues(menu, arglist, num_args); | |||||
| 216 | ||||||
| 217 | XtPopupSpringLoaded(menu); | |||||
| 218 | } | |||||
| 219 |