2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2011 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_cursor_t cursor;
38 static xcb_key_symbols_t *symbols;
39 static xcb_screen_t *scr;
40 static pam_handle_t *pam_handle;
41 static int input_position = 0;
42 /* holds the password you enter (in UTF-8) */
43 static char password[512];
44 static bool modeswitch_active = false;
45 static int modeswitchmask;
46 static int numlockmask;
47 static bool beep = false;
50 static cairo_surface_t *img = NULL;
51 static cairo_t *ctx = NULL;
52 static bool tile = false;
55 static void input_done() {
56 if (input_position == 0)
59 /* TODO: change cursor during authentication? */
60 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
61 printf("successfully authenticated\n");
65 fprintf(stderr, "Authentication failure\n");
67 /* beep on authentication failure, if enabled */
75 * Called when we should draw the image (if any).
78 static void handle_expose_event() {
84 /* create a pattern and fill a rectangle as big as the screen */
85 cairo_pattern_t *pattern;
86 pattern = cairo_pattern_create_for_surface(img);
87 cairo_set_source(ctx, pattern);
88 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
89 cairo_rectangle(ctx, 0, 0, scr->width_in_pixels, scr->height_in_pixels);
92 /* otherwise, just paint the image */
100 * Called when the user releases a key. We need to leave the Mode_switch
101 * state when the user releases the Mode_switch key.
104 static void handle_key_release(xcb_key_release_event_t *event) {
105 //printf("releasing %d, state raw = %d\n", event->detail, event->state);
108 event->state &= ~numlockmask;
110 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
111 if (sym == XK_Mode_switch) {
112 //printf("Mode switch disabled\n");
113 modeswitch_active = false;
118 * Handle key presses. Fixes state, then looks up the key symbol for the
119 * given keycode, then looks up the key symbol (as UCS-2), converts it to
120 * UTF-8 and stores it in the password array.
123 static void handle_key_press(xcb_key_press_event_t *event) {
124 //printf("keypress %d, state raw = %d\n", event->detail, event->state);
126 xcb_keysym_t sym0, sym1, sym;
127 if (modeswitch_active) {
128 sym0 = xcb_key_press_lookup_keysym(symbols, event, 4);
129 sym1 = xcb_key_press_lookup_keysym(symbols, event, 5);
131 sym0 = xcb_key_press_lookup_keysym(symbols, event, 0);
132 sym1 = xcb_key_press_lookup_keysym(symbols, event, 1);
136 //printf("Mode switch enabled\n");
137 modeswitch_active = true;
145 password[input_position] = '\0';
149 if (input_position == 0)
152 /* decrement input_position to point to the previous glyph */
153 u8_dec(password, &input_position);
154 password[input_position] = '\0';
155 //printf("new input position = %d, new password = %s\n", input_position, password);
159 if ((input_position + 8) >= sizeof(password))
162 if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) {
163 /* this key was a keypad key */
164 if ((event->state & XCB_MOD_MASK_SHIFT))
168 if ((event->state & XCB_MOD_MASK_SHIFT))
174 /* FIXME: handle all of these? */
175 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
176 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
177 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
178 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
179 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
180 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
181 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
184 if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
187 //printf("sym = %c (%d)\n", sym, sym);
189 /* convert the keysym to UCS */
190 uint16_t ucs = keysym2ucs(sym);
191 if ((int16_t)ucs == -1) {
192 fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
196 /* store the UCS in a string to convert it */
197 uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
199 /* store it in the password array as UTF-8 */
200 input_position += convert_ucs_to_utf8((char*)inp, password + input_position);
201 password[input_position] = '\0';
202 //printf("current password = %s\n", password);
206 * A visibility notify event will be received when the visibility (= can the
207 * user view the complete window) changes, so for example when a popup overlays
208 * some area of the i3lock window.
210 * In this case, we raise our window on top so that the popup (or whatever is
211 * hiding us) gets hidden.
214 void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
215 printf("visibility notify (window 0x%08x, state %d)\n", event->window, event->state);
216 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
217 printf("window is obscured (not fully visible), raising\n");
218 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
219 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
225 * Called when the keyboard mapping changes. We update our symbols and re-grab
229 void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
230 printf("mapping notify\n");
231 xcb_refresh_keyboard_mapping(symbols, event);
233 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
234 xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
235 grab_pointer_and_keyboard(conn, scr, cursor);
237 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
238 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
244 * Callback function for PAM. We only react on password request callbacks.
247 static int conv_callback(int num_msg, const struct pam_message **msg,
248 struct pam_response **resp, void *appdata_ptr)
253 /* PAM expects an array of responses, one for each message */
254 if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
259 for (int c = 0; c < num_msg; c++) {
260 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
261 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
264 /* return code is currently not used but should be set to zero */
265 resp[c]->resp_retcode = 0;
266 if ((resp[c]->resp = strdup(password)) == NULL) {
275 int main(int argc, char *argv[]) {
276 bool dont_fork = false;
278 char color[7] = "ffffff";
281 char *image_path = NULL;
284 struct pam_conv conv = {conv_callback, NULL};
286 xcb_visualtype_t *vistype;
287 xcb_generic_event_t *event;
289 int curs_choice = CURS_NONE;
292 struct option longopts[] = {
293 {"version", no_argument, NULL, 'v'},
294 {"nofork", no_argument, NULL, 'n'},
295 {"beep", no_argument, NULL, 'b'},
296 {"dpms", no_argument, NULL, 'd'},
297 {"color", required_argument, NULL, 'c'},
298 {"pointer", required_argument, NULL , 'p'},
300 {"image", required_argument, NULL, 'i'},
301 {"tiling", no_argument, NULL, 't'},
303 {NULL, no_argument, NULL, 0}
306 if ((username = getenv("USER")) == NULL)
307 errx(1, "USER environment variable not set, please set it.\n");
309 while ((o = getopt_long(argc, argv, "vnbdc:p:"
313 , longopts, &optind)) != -1) {
316 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2011 Michael Stapelberg\n");
329 /* Skip # if present */
333 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
334 errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n");
340 image_path = strdup(optarg);
347 if (!strcmp(optarg, "win")) {
348 curs_choice = CURS_WIN;
350 if (!strcmp(optarg, "default")) {
351 curs_choice = CURS_DEFAULT;
355 errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-p win|default]"
357 " [-i image.png] [-t]"
359 " (compiled with NOLIBCAIRO)"
366 ret = pam_start("i3lock", username, &conv, &pam_handle);
367 if (ret != PAM_SUCCESS)
368 errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret));
370 /* Initialize connection to X11 */
371 if ((conn = xcb_connect(NULL, &screen)) == NULL ||
372 xcb_connection_has_error(conn))
373 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
376 /* In the parent process, we exit */
381 /* if DPMS is enabled, check if the X server really supports it */
383 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
384 xcb_dpms_capable_reply_t *dpmsr;
385 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) {
386 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
391 scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
392 vistype = get_root_visual_type(scr);
394 /* open the fullscreen window and flush immediately afterwards so that X11
395 * can generate an expose event while we load the PNG file (so that we are
396 * ready to handle the expose event immediately afterwards) */
397 win = open_fullscreen_window(conn, scr, color);
399 cursor = create_cursor(conn, scr, win, curs_choice);
401 grab_pointer_and_keyboard(conn, scr, cursor);
403 symbols = xcb_key_symbols_alloc(conn);
404 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
405 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
409 img = cairo_image_surface_create_from_png(image_path);
412 /* Initialize cairo */
413 cairo_surface_t *output;
414 output = cairo_xcb_surface_create(conn, win, vistype,
415 scr->width_in_pixels, scr->height_in_pixels);
416 ctx = cairo_create(output);
418 cairo_set_source_surface(ctx, img, 0, 0);
420 handle_expose_event();
425 dpms_turn_off_screen(conn);
427 while ((event = xcb_wait_for_event(conn))) {
428 if (event->response_type == 0)
429 errx(1, "XCB: Invalid event received");
431 /* Strip off the highest bit (set if the event is generated) */
432 int type = (event->response_type & 0x7F);
434 if (type == XCB_EXPOSE) {
435 handle_expose_event();
439 if (type == XCB_KEY_PRESS) {
440 handle_key_press((xcb_key_press_event_t*)event);
444 if (type == XCB_KEY_RELEASE) {
445 handle_key_release((xcb_key_release_event_t*)event);
447 /* If this was the backspace or escape key we are back at an
448 * empty input, so turn off the screen if DPMS is enabled */
449 if (dpms && input_position == 0)
450 dpms_turn_off_screen(conn);
455 if (type == XCB_VISIBILITY_NOTIFY) {
456 handle_visibility_notify((xcb_visibility_notify_event_t*)event);
460 if (type == XCB_MAPPING_NOTIFY) {
461 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
465 printf("WARNING: unhandled event of type %d\n", type);