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 | } |