Bug Summary

File:frontends/framebuffer/fbtk/osk.c
Warning:line 176, column 2
Value stored to 'widget' is never read

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name osk.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/scan-build-netsurf -fcoverage-compilation-dir=/var/lib/jenkins/workspace/scan-build-netsurf -resource-dir /usr/lib/llvm-19/lib/clang/19 -isystem /usr/include/mit-krb5 -I . -I include -I build/Linux-framebuffer -I frontends -I content/handlers -D WITH_JPEG -U WITH_PDF_EXPORT -D LIBICONV_PLUG -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -I /usr/include/x86_64-linux-gnu -I /usr/include/p11-kit-1 -D WITH_CURL -D WITH_OPENSSL -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D UTF8PROC_EXPORTS -D WITH_UTF8PROC -I /usr/include/webp -D WITH_WEBP -I /usr/include/libpng16 -D WITH_PNG -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include/ -D WITH_BMP -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D WITH_GIF -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D WITH_NS_SVG -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D WITH_NSSPRITE -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D WITH_NSPSL -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D WITH_NSLOG -D NETSURF_UA_FORMAT_STRING="Mozilla/5.0 (%s) NetSurf/%d.%d" -D NETSURF_HOMEPAGE="about:welcome" -D NETSURF_LOG_LEVEL=VERBOSE -D NETSURF_BUILTIN_LOG_FILTER="(level:WARNING || cat:jserrors)" -D NETSURF_BUILTIN_VERBOSE_FILTER="(level:VERBOSE || cat:jserrors)" -D STMTEXPR=1 -D nsframebuffer -D small -D NETSURF_FB_RESPATH="${HOME}/.netsurf/:${NETSURFRES}:/var/lib/jenkins/artifacts-x86_64-linux-gnu/share/netsurf:./frontends/framebuffer/res" -D NETSURF_FB_FONTPATH="/usr/share/fonts/truetype/dejavu:/usr/share/fonts/truetype/msttcorefonts" -D NETSURF_FB_FONT_SANS_SERIF="DejaVuSans.ttf" -D NETSURF_FB_FONT_SANS_SERIF_BOLD="DejaVuSans-Bold.ttf" -D NETSURF_FB_FONT_SANS_SERIF_ITALIC="DejaVuSans-Oblique.ttf" -D NETSURF_FB_FONT_SANS_SERIF_ITALIC_BOLD="DejaVuSans-BoldOblique.ttf" -D NETSURF_FB_FONT_SERIF="DejaVuSerif.ttf" -D NETSURF_FB_FONT_SERIF_BOLD="DejaVuSerif-Bold.ttf" -D NETSURF_FB_FONT_MONOSPACE="DejaVuSansMono.ttf" -D NETSURF_FB_FONT_MONOSPACE_BOLD="DejaVuSansMono-Bold.ttf" -D NETSURF_FB_FONT_CURSIVE="Comic_Sans_MS.ttf" -D NETSURF_FB_FONT_FANTASY="Impact.ttf" -I /var/lib/jenkins/artifacts-x86_64-linux-gnu/include -D _POSIX_C_SOURCE=200809L -D _XOPEN_SOURCE=700 -D _BSD_SOURCE -D _DEFAULT_SOURCE -D _NETBSD_SOURCE -D DUK_OPT_HAVE_CUSTOM_H -internal-isystem /usr/lib/llvm-19/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wwrite-strings -Wno-unused-parameter -Wno-unused-but-set-variable -std=c99 -fconst-strings -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -vectorize-loops -vectorize-slp -analyzer-display-progress -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /var/lib/jenkins/workspace/scan-build-netsurf/clangScanBuildReports/2025-11-28-112142-2500428-1 -x c frontends/framebuffer/fbtk/osk.c
1/*
2 * Copyright 2010 Vincent Sanders <vince@simtec.co.uk>
3 *
4 * Framebuffer windowing toolkit on screen keyboard.
5 *
6 * This file is part of NetSurf, http://www.netsurf-browser.org/
7 *
8 * NetSurf is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * NetSurf is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <stdbool.h>
22#include <limits.h>
23
24#include <libnsfb.h>
25#include <libnsfb_plot.h>
26#include <libnsfb_event.h>
27#include <libnsfb_cursor.h>
28
29#include "utils/log.h"
30#include "netsurf/browser_window.h"
31
32#include "framebuffer/gui.h"
33#include "framebuffer/fbtk.h"
34#include "framebuffer/image_data.h"
35
36#include "widget.h"
37
38struct kbd_button_s {
39 int x;
40 int y;
41 int w;
42 int h;
43 const char *t;
44 enum nsfb_key_code_e keycode;
45};
46
47#define KEYCOUNT58 58
48
49static struct kbd_button_s kbdbase[KEYCOUNT58] = {
50 { 0, 0, 20, 15, "`", NSFB_KEY_BACKQUOTE},
51 { 20, 0, 20, 15, "1", NSFB_KEY_1},
52 { 40, 0, 20, 15, "2", NSFB_KEY_2},
53 { 60, 0, 20, 15, "3", NSFB_KEY_3},
54 { 80, 0, 20, 15, "4", NSFB_KEY_4},
55 { 100, 0, 20, 15, "5", NSFB_KEY_5},
56 { 120, 0, 20, 15, "6", NSFB_KEY_6},
57 { 140, 0, 20, 15, "7", NSFB_KEY_7},
58 { 160, 0, 20, 15, "8", NSFB_KEY_8},
59 { 180, 0, 20, 15, "9", NSFB_KEY_9},
60 { 200, 0, 20, 15, "0", NSFB_KEY_0},
61 { 220, 0, 20, 15, "-", NSFB_KEY_MINUS},
62 { 240, 0, 20, 15, "=", NSFB_KEY_EQUALS},
63 { 260, 0, 40, 15, "\xe2\x8c\xab", NSFB_KEY_BACKSPACE},
64 { 0, 15, 30, 15, "\xe2\x86\xb9", NSFB_KEY_TAB},
65 { 30, 15, 20, 15, "q", NSFB_KEY_q},
66 { 50, 15, 20, 15, "w", NSFB_KEY_w},
67 { 70, 15, 20, 15, "e", NSFB_KEY_e},
68 { 90, 15, 20, 15, "r", NSFB_KEY_r},
69 { 110, 15, 20, 15, "t", NSFB_KEY_t},
70 { 130, 15, 20, 15, "y", NSFB_KEY_y},
71 { 150, 15, 20, 15, "u", NSFB_KEY_u},
72 { 170, 15, 20, 15, "i", NSFB_KEY_i},
73 { 190, 15, 20, 15, "o", NSFB_KEY_o},
74 { 210, 15, 20, 15, "p", NSFB_KEY_p},
75 { 230, 15, 20, 15, "[", NSFB_KEY_LEFTBRACKET},
76 { 250, 15, 20, 15, "]", NSFB_KEY_RIGHTBRACKET},
77 { 275, 15, 25, 30, "\xe2\x8f\x8e", NSFB_KEY_RETURN},
78 { 35, 30, 20, 15, "a", NSFB_KEY_a},
79 { 55, 30, 20, 15, "s", NSFB_KEY_s},
80 { 75, 30, 20, 15, "d", NSFB_KEY_d},
81 { 95, 30, 20, 15, "f", NSFB_KEY_f},
82 { 115, 30, 20, 15, "g", NSFB_KEY_g},
83 { 135, 30, 20, 15, "h", NSFB_KEY_h},
84 { 155, 30, 20, 15, "j", NSFB_KEY_j},
85 { 175, 30, 20, 15, "k", NSFB_KEY_k},
86 { 195, 30, 20, 15, "l", NSFB_KEY_l},
87 { 215, 30, 20, 15, ";", NSFB_KEY_SEMICOLON},
88 { 235, 30, 20, 15, "'", NSFB_KEY_l},
89 { 255, 30, 20, 15, "#", NSFB_KEY_HASH},
90 { 0, 45, 25, 15, "\xe2\x87\xa7", NSFB_KEY_LSHIFT},
91 { 25, 45, 20, 15, "\\", NSFB_KEY_SLASH},
92 { 45, 45, 20, 15, "z", NSFB_KEY_z},
93 { 65, 45, 20, 15, "x", NSFB_KEY_x},
94 { 85, 45, 20, 15, "c", NSFB_KEY_c},
95 { 105, 45, 20, 15, "v", NSFB_KEY_v},
96 { 125, 45, 20, 15, "b", NSFB_KEY_b},
97 { 145, 45, 20, 15, "n", NSFB_KEY_n},
98 { 165, 45, 20, 15, "m", NSFB_KEY_m},
99 { 185, 45, 20, 15, ",", NSFB_KEY_COMMA},
100 { 205, 45, 20, 15, ".", NSFB_KEY_PERIOD},
101 { 225, 45, 20, 15, "/", NSFB_KEY_BACKSLASH},
102 { 245, 45, 55, 15, "\xe2\x87\xa7", NSFB_KEY_RSHIFT},
103 { 40, 67, 185, 15, "", NSFB_KEY_SPACE},
104 { 250, 60, 20, 15, "\xe2\x96\xb2", NSFB_KEY_UP},
105 { 230, 67, 20, 15, "\xe2\x97\x80", NSFB_KEY_LEFT},
106 { 270, 67, 20, 15, "\xe2\x96\xb6", NSFB_KEY_RIGHT},
107 { 250, 75, 20, 15, "\xe2\x96\xbc", NSFB_KEY_DOWN},
108};
109
110static fbtk_widget_t *osk;
111
112static int
113osk_close(fbtk_widget_t *widget, fbtk_callback_info *cbi)
114{
115 if (cbi->event->type != NSFB_EVENT_KEY_UP)
116 return 0;
117
118 fbtk_set_mapping(osk, false0);
119
120 return 0;
121}
122
123static int
124osk_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
125{
126 nsfb_event_t event;
127 struct kbd_button_s *kbd_button = cbi->context;
128
129 event.type = cbi->event->type;
130 event.value.keycode = kbd_button->keycode;
131 fbtk_input(widget, &event);
132
133 return 0;
134}
135
136/* exported function documented in fbtk.h */
137void
138fbtk_enable_oskb(fbtk_widget_t *fbtk)
1
[debug] analyzing from fbtk_enable_oskb
→
139{
140 fbtk_widget_t *widget;
141 int kloop;
142 int maxx = 0;
143 int maxy = 0;
144 int ww;
145 int wh;
146 fbtk_widget_t *root = fbtk_get_root_widget(fbtk);
147 int furniture_width = 18;
148
149 for (kloop=0; kloop < KEYCOUNT58; kloop++) {
150 if ((kbdbase[kloop].x + kbdbase[kloop].w) > maxx)
151 maxx=kbdbase[kloop].x + kbdbase[kloop].w;
152 if ((kbdbase[kloop].y + kbdbase[kloop].h) > maxy)
153 maxy=kbdbase[kloop].y + kbdbase[kloop].h;
154 }
155
156 ww = fbtk_get_width(root);
157
158 /* scale window height apropriately */
159 wh = (maxy * ww) / maxx;
160
161 osk = fbtk_create_window(root, 0, fbtk_get_height(root) - wh, 0, wh, 0xff202020);
162
163 for (kloop=0; kloop < KEYCOUNT58; kloop++) {
164 widget = fbtk_create_text_button(osk,
165 (kbdbase[kloop].x * ww) / maxx,
166 (kbdbase[kloop].y * ww) / maxx,
167 (kbdbase[kloop].w * ww) / maxx,
168 (kbdbase[kloop].h *ww) / maxx,
169 FB_FRAME_COLOUR0xFFDDDDDD,
170 FB_COLOUR_BLACK0xFF000000,
171 osk_click,
172 &kbdbase[kloop]);
173 fbtk_set_text(widget, kbdbase[kloop].t);
174 }
175
176 widget = fbtk_create_button(osk,
2
←
Value stored to 'widget' is never read
177 fbtk_get_width(osk) - furniture_width,
178 fbtk_get_height(osk) - furniture_width,
179 furniture_width,
180 furniture_width,
181 FB_FRAME_COLOUR0xFFDDDDDD,
182 &osk_image,
183 osk_close,
184 NULL((void*)0));
185}
186
187/* exported function documented in fbtk.h */
188void
189map_osk(void)
190{
191 fbtk_set_zorder(osk, INT_MIN(-2147483647 -1));
192 fbtk_set_mapping(osk, true1);
193}
194
195/*
196 * Local Variables:
197 * c-basic-offset:8
198 * End:
199 */