2 * vim:ts=4:sw=4:expandtab
4 * © 2010 Michael Stapelberg
6 * See LICENSE for licensing information
17 #include <xcb/xcb_keysyms.h>
20 #include <security/pam_appl.h>
21 /* FIXME: can we get rid of this header? */
22 #include <X11/keysym.h>
28 #include <cairo/cairo-xcb.h>
31 #include "keysym2ucs.h"
32 #include "ucs2_to_utf8.h"
36 static xcb_connection_t *conn;
37 static xcb_key_symbols_t *symbols;
38 static xcb_screen_t *scr;
39 static pam_handle_t *pam_handle;
40 static int input_position = 0;
41 /* holds the password you enter (in UTF-8) */
42 static char password[512];
43 static bool modeswitch_active = false;
44 static int modeswitchmask;
45 static int numlockmask;
46 static bool beep = false;
49 static cairo_surface_t *img = NULL;
50 static cairo_t *ctx = NULL;
51 static bool tile = false;
54 static void input_done() {
55 if (input_position == 0)
58 /* TODO: change cursor during authentication? */
59 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
60 printf("successfully authenticated\n");
64 /* beep on authentication failure, if enabled */
72 * Called when we should draw the image (if any).
75 static void handle_expose_event() {
81 /* create a pattern and fill a rectangle as big as the screen */
82 cairo_pattern_t *pattern;
83 pattern = cairo_pattern_create_for_surface(img);
84 cairo_set_source(ctx, pattern);
85 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
86 cairo_rectangle(ctx, 0, 0, scr->width_in_pixels, scr->height_in_pixels);
89 /* otherwise, just paint the image */
97 * Called when the user releases a key. We need to leave the Mode_switch
98 * state when the user releases the Mode_switch key.
101 static void handle_key_release(xcb_key_release_event_t *event) {
102 //printf("releasing %d, state raw = %d\n", event->detail, event->state);
105 event->state &= ~numlockmask;
107 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
108 if (sym == XK_Mode_switch) {
109 //printf("Mode switch disabled\n");
110 modeswitch_active = false;
115 * Handle key presses. Fixes state, then looks up the key symbol for the
116 * given keycode, then looks up the key symbol (as UCS-2), converts it to
117 * UTF-8 and stores it in the password array.
120 static void handle_key_press(xcb_key_press_event_t *event) {
121 //printf("keypress %d, state raw = %d\n", event->detail, event->state);
124 if (modeswitch_active)
125 event->state |= modeswitchmask;
127 /* Apparantly, after activating numlock once, the numlock modifier
128 * stays turned on (use xev(1) to verify). So, to resolve useful
129 * keysyms, we remove the numlock flag from the event state */
130 event->state &= ~numlockmask;
132 if ((input_position + 8) >= sizeof(password))
135 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
138 //printf("Mode switch enabled\n");
139 modeswitch_active = true;
146 password[input_position] = '\0';
150 if (input_position == 0)
153 /* decrement input_position to point to the previous glyph */
154 u8_dec(password, &input_position);
155 password[input_position] = '\0';
156 //printf("new input position = %d, new password = %s\n", input_position, password);
161 /* FIXME: handle all of these? */
162 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
163 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
164 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
165 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
166 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
167 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
168 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
171 if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
174 //printf("sym = %c (%d)\n", sym, sym);
176 /* convert the keysym to UCS */
177 uint16_t ucs = keysym2ucs(sym);
178 if ((int16_t)ucs == -1) {
179 fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
183 /* store the UCS in a string to convert it */
184 uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
186 /* store it in the password array as UTF-8 */
187 input_position += convert_ucs_to_utf8((char*)inp, password + input_position);
188 password[input_position] = '\0';
189 //printf("current password = %s\n", password);
193 * A visibility notify event will be received when the visibility (= can the
194 * user view the complete window) changes, so for example when a popup overlays
195 * some area of the i3lock window.
197 * In this case, we raise our window on top so that the popup (or whatever is
198 * hiding us) gets hidden.
201 void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
202 printf("visibility notify (window 0x%08x, state %d)\n", event->window, event->state);
203 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
204 printf("window is obscured (not fully visible), raising\n");
205 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
206 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
212 * Callback function for PAM. We only react on password request callbacks.
215 static int conv_callback(int num_msg, const struct pam_message **msg,
216 struct pam_response **resp, void *appdata_ptr)
221 /* PAM expects an array of responses, one for each message */
222 if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
227 for (int c = 0; c < num_msg; c++) {
228 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
229 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
232 /* return code is currently not used but should be set to zero */
233 resp[c]->resp_retcode = 0;
234 if ((resp[c]->resp = strdup(password)) == NULL) {
243 int main(int argc, char *argv[]) {
244 bool dont_fork = false;
246 char color[7] = "ffffff";
249 char *image_path = NULL;
252 struct pam_conv conv = {conv_callback, NULL};
254 xcb_visualtype_t *vistype;
255 xcb_generic_event_t *event;
258 int curs_choice = CURS_NONE;
261 struct option longopts[] = {
262 {"version", no_argument, NULL, 'v'},
263 {"nofork", no_argument, NULL, 'n'},
264 {"beep", no_argument, NULL, 'b'},
265 {"dpms", no_argument, NULL, 'd'},
266 {"color", required_argument, NULL, 'c'},
267 {"pointer", required_argument, NULL , 'p'},
269 {"image", required_argument, NULL, 'i'},
270 {"tiling", no_argument, NULL, 't'},
272 {NULL, no_argument, NULL, 0}
275 if ((username = getenv("USER")) == NULL)
276 errx(1, "USER environment variable not set, please set it.\n");
278 while ((o = getopt_long(argc, argv, "vnbdc:p:"
282 , longopts, &optind)) != -1) {
285 errx(EXIT_SUCCESS, "version " VERSION " © 2010 Michael Stapelberg\n");
298 /* Skip # if present */
302 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
303 errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n");
309 image_path = strdup(optarg);
316 if (!strcmp(optarg, "win")) {
317 curs_choice = CURS_WIN;
319 if (!strcmp(optarg, "default")) {
320 curs_choice = CURS_DEFAULT;
324 errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-p win|default]"
326 " [-i image.png] [-t]"
328 " (compiled with NOLIBCAIRO)"
335 ret = pam_start("i3lock", username, &conv, &pam_handle);
336 if (ret != PAM_SUCCESS)
337 errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret));
339 /* Initialize connection to X11 */
340 if ((conn = xcb_connect(NULL, &screen)) == NULL)
341 err(EXIT_FAILURE, "xcb_connect()");
344 /* In the parent process, we exit */
349 /* if DPMS is enabled, check if the X server really supports it */
351 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
352 xcb_dpms_capable_reply_t *dpmsr;
353 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) {
354 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
359 scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
360 vistype = get_root_visual_type(scr);
362 /* open the fullscreen window and flush immediately afterwards so that X11
363 * can generate an expose event while we load the PNG file (so that we are
364 * ready to handle the expose event immediately afterwards) */
365 win = open_fullscreen_window(conn, scr, color);
367 cursor = create_cursor(conn, scr, win, curs_choice);
369 grab_pointer_and_keyboard(conn, scr, cursor);
371 symbols = xcb_key_symbols_alloc(conn);
372 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
373 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
377 img = cairo_image_surface_create_from_png(image_path);
380 /* Initialize cairo */
381 cairo_surface_t *output;
382 output = cairo_xcb_surface_create(conn, win, vistype,
383 scr->width_in_pixels, scr->height_in_pixels);
384 ctx = cairo_create(output);
386 cairo_set_source_surface(ctx, img, 0, 0);
388 handle_expose_event();
393 dpms_turn_off_screen(conn);
395 while ((event = xcb_wait_for_event(conn))) {
396 if (event->response_type == 0)
397 errx(1, "XCB: Invalid event received");
399 /* Strip off the highest bit (set if the event is generated) */
400 int type = (event->response_type & 0x7F);
402 if (type == XCB_EXPOSE) {
403 handle_expose_event();
407 if (type == XCB_KEY_PRESS) {
408 handle_key_press((xcb_key_press_event_t*)event);
412 if (type == XCB_KEY_RELEASE) {
413 handle_key_release((xcb_key_release_event_t*)event);
415 /* If this was the backspace or escape key we are back at an
416 * empty input, so turn off the screen if DPMS is enabled */
417 if (dpms && input_position == 0)
418 dpms_turn_off_screen(conn);
423 if (type == XCB_VISIBILITY_NOTIFY) {
424 handle_visibility_notify((xcb_visibility_notify_event_t*)event);
428 printf("WARNING: unhandled event of type %d\n", type);