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00014 #include <ev.h>
00015 #include <stdio.h>
00016 #include <stdlib.h>
00017 #include <string.h>
00018 #include <unistd.h>
00019 #include <iconv.h>
00020 #include <signal.h>
00021
00022 #include <xcb/xcb.h>
00023 #include <xcb/xcb_aux.h>
00024 #include <xcb/xcb_event.h>
00025 #include <xcb/xcb_keysyms.h>
00026
00027 #include <X11/keysym.h>
00028
00029 #include "all.h"
00030
00031 static xcb_gcontext_t pixmap_gc;
00032 static xcb_pixmap_t pixmap;
00033 static int raised_signal;
00034
00035 static char *crash_text[] = {
00036 "i3 just crashed.",
00037 "To debug this problem, either attach gdb now",
00038 "or press",
00039 "- 'e' to exit and get a core-dump,",
00040 "- 'r' to restart i3 in-place or",
00041 "- 'f' to forget the current layout and restart"
00042 };
00043 static int crash_text_longest = 5;
00044
00045
00046
00047
00048
00049 static int sig_draw_window(xcb_window_t win, int width, int height, int font_height) {
00050
00051 xcb_rectangle_t border = { 0, 0, width, height},
00052 inner = { 2, 2, width - 4, height - 4};
00053 xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel("#FF0000"));
00054 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &border);
00055 xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel("#000000"));
00056 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &inner);
00057
00058
00059 xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel("#FFFFFF"));
00060
00061 for (int i = 0; i < sizeof(crash_text) / sizeof(char*); i++) {
00062 int text_len = strlen(crash_text[i]);
00063 char *full_text = convert_utf8_to_ucs2(crash_text[i], &text_len);
00064 xcb_image_text_16(conn, text_len, pixmap, pixmap_gc, 8 ,
00065 3 + (i + 1) * font_height ,
00066 (xcb_char2b_t*)full_text);
00067 free(full_text);
00068 }
00069
00070
00071 xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, width, height);
00072 xcb_flush(conn);
00073
00074 return 1;
00075 }
00076
00077
00078
00079
00080
00081 static int sig_handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
00082 uint16_t state = event->state;
00083
00084
00085
00086
00087 state &= ~xcb_numlock_mask;
00088
00089 xcb_keysym_t sym = xcb_key_press_lookup_keysym(keysyms, event, state);
00090
00091 if (sym == 'e') {
00092 DLOG("User issued exit-command, raising error again.\n");
00093 raise(raised_signal);
00094 exit(1);
00095 }
00096
00097 if (sym == 'r')
00098 i3_restart(false);
00099
00100 if (sym == 'f')
00101 i3_restart(true);
00102
00103 return 1;
00104 }
00105
00106
00107
00108
00109
00110 static xcb_window_t open_input_window(xcb_connection_t *conn, Rect screen_rect, uint32_t width, uint32_t height) {
00111 xcb_window_t win = xcb_generate_id(conn);
00112
00113 uint32_t mask = 0;
00114 uint32_t values[2];
00115
00116 mask |= XCB_CW_BACK_PIXEL;
00117 values[0] = 0;
00118
00119 mask |= XCB_CW_OVERRIDE_REDIRECT;
00120 values[1] = 1;
00121
00122
00123 uint32_t x = screen_rect.x + ((screen_rect.width / 2) - (width / 2)),
00124 y = screen_rect.y + ((screen_rect.height / 2) - (height / 2));
00125
00126 xcb_create_window(conn,
00127 XCB_COPY_FROM_PARENT,
00128 win,
00129 root,
00130 x, y, width, height,
00131 0,
00132 XCB_WINDOW_CLASS_INPUT_OUTPUT,
00133 XCB_WINDOW_CLASS_COPY_FROM_PARENT,
00134 mask,
00135 values);
00136
00137
00138 xcb_map_window(conn, win);
00139
00140 return win;
00141 }
00142
00143
00144
00145
00146
00147
00148
00149 void handle_signal(int sig, siginfo_t *info, void *data) {
00150 DLOG("i3 crashed. SIG: %d\n", sig);
00151
00152 struct sigaction action;
00153 action.sa_handler = SIG_DFL;
00154 sigaction(sig, &action, NULL);
00155 raised_signal = sig;
00156
00157
00158 int crash_text_num = sizeof(crash_text) / sizeof(char*);
00159 int height = 13 + (crash_text_num * config.font.height);
00160
00161
00162 int text_len = strlen(crash_text[crash_text_longest]);
00163 char *longest_text = convert_utf8_to_ucs2(crash_text[crash_text_longest], &text_len);
00164 int font_width = predict_text_width(longest_text, text_len);
00165 int width = font_width + 20;
00166
00167
00168 Output *screen;
00169 xcb_window_t win;
00170 TAILQ_FOREACH(screen, &outputs, outputs) {
00171 if (!screen->active)
00172 continue;
00173 win = open_input_window(conn, screen->rect, width, height);
00174
00175
00176 pixmap = xcb_generate_id(conn);
00177 pixmap_gc = xcb_generate_id(conn);
00178 xcb_create_pixmap(conn, root_depth, pixmap, win, width, height);
00179 xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
00180
00181
00182 xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FONT, config.font.id);
00183
00184
00185 xcb_grab_keyboard(conn, false, win, XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
00186
00187
00188 xcb_grab_pointer(conn, false, win, XCB_NONE, XCB_GRAB_MODE_ASYNC,
00189 XCB_GRAB_MODE_ASYNC, win, XCB_NONE, XCB_CURRENT_TIME);
00190
00191 sig_draw_window(win, width, height, config.font.height);
00192 xcb_flush(conn);
00193 }
00194
00195 xcb_generic_event_t *event;
00196
00197 while ((event = xcb_wait_for_event(conn))) {
00198
00199 int type = (event->response_type & 0x7F);
00200 if (type == XCB_KEY_PRESS) {
00201 sig_handle_key_press(NULL, conn, (xcb_key_press_event_t*)event);
00202 }
00203 free(event);
00204 }
00205 }
00206
00207
00208
00209
00210
00211 void setup_signal_handler() {
00212 struct sigaction action;
00213
00214 action.sa_sigaction = handle_signal;
00215 action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
00216 sigemptyset(&action.sa_mask);
00217
00218 if (sigaction(SIGSEGV, &action, NULL) == -1 ||
00219 sigaction(SIGABRT, &action, NULL) == -1 ||
00220 sigaction(SIGFPE, &action, NULL) == -1)
00221 ELOG("Could not setup signal handler");
00222 }