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 bool iso_level3_shift_active = false;
46 static int modeswitchmask;
47 static int numlockmask;
48 static bool beep = false;
49 static bool debug_mode = false;
51 #define DEBUG(fmt, ...) do { \
53 printf("[i3lock-debug] " fmt, ##__VA_ARGS__); \
57 static cairo_surface_t *img = NULL;
58 static bool tile = false;
62 * Draws global image with fill color onto a pixmap with the given
63 * resolution and returns it.
66 xcb_pixmap_t draw_image(xcb_visualtype_t *vistype, u_int32_t* resolution, char* color) {
67 xcb_pixmap_t bg_pixmap = XCB_NONE;
73 bg_pixmap = create_bg_pixmap(conn, scr, resolution, color);
74 /* Initialize cairo */
75 cairo_surface_t *output;
76 output = cairo_xcb_surface_create(conn, bg_pixmap, vistype,
77 resolution[0], resolution[1]);
78 cairo_t *ctx = cairo_create(output);
80 cairo_set_source_surface(ctx, img, 0, 0);
83 /* create a pattern and fill a rectangle as big as the screen */
84 cairo_pattern_t *pattern;
85 pattern = cairo_pattern_create_for_surface(img);
86 cairo_set_source(ctx, pattern);
87 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
88 cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]);
90 cairo_pattern_destroy(pattern);
92 cairo_surface_destroy(output);
98 static void input_done() {
99 if (input_position == 0)
102 /* TODO: change cursor during authentication? */
103 if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
104 printf("successfully authenticated\n");
108 fprintf(stderr, "Authentication failure\n");
110 /* beep on authentication failure, if enabled */
118 * Called when the user releases a key. We need to leave the Mode_switch
119 * state when the user releases the Mode_switch key.
122 static void handle_key_release(xcb_key_release_event_t *event) {
123 DEBUG("releasing key %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n",
124 event->detail, event->state, modeswitch_active, iso_level3_shift_active);
126 /* We don’t care about the column here and just use the first symbol. Since
127 * we only check for Mode_switch and ISO_Level3_Shift, this *should* work.
128 * Also, if we would use the current column, we would look in the wrong
130 xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, 0);
131 if (sym == XK_Mode_switch) {
132 //printf("Mode switch disabled\n");
133 modeswitch_active = false;
134 } else if (sym == XK_ISO_Level3_Shift) {
135 iso_level3_shift_active = false;
137 DEBUG("release done. modeswitch_active = %d, iso_level3_shift_active = %d\n",
138 modeswitch_active, iso_level3_shift_active);
142 * Handle key presses. Fixes state, then looks up the key symbol for the
143 * given keycode, then looks up the key symbol (as UCS-2), converts it to
144 * UTF-8 and stores it in the password array.
147 static void handle_key_press(xcb_key_press_event_t *event) {
148 DEBUG("keypress %d, state raw = %d, modeswitch_active = %d, iso_level3_shift_active = %d\n",
149 event->detail, event->state, modeswitch_active, iso_level3_shift_active);
151 xcb_keysym_t sym0, sym1, sym;
152 /* For each keycode, there is a list of symbols. The list could look like this:
153 * $ xmodmap -pke | grep 'keycode 38'
154 * keycode 38 = a A adiaeresis Adiaeresis o O
155 * In non-X11 terminology, the symbols for the keycode 38 (the key labeled
156 * with "a" on my keyboard) are "a A ä Ä o O".
157 * Another form to display the same information is using xkbcomp:
158 * $ xkbcomp $DISPLAY /tmp/xkb.dump
159 * Then open /tmp/xkb.dump and search for '\<a\>' (in VIM regexp-language):
161 * symbols[Group1]= [ a, A, o, O ],
162 * symbols[Group2]= [ adiaeresis, Adiaeresis ]
164 * So there are two *groups*, one containing 'a A' and one containing 'ä
165 * Ä'. You can use Mode_switch to switch between these groups. You can use
166 * ISO_Level3_Shift to reach the 'o O' part of the first group (it’s the
167 * same group, just an even higher shift level).
169 * So, using the "logical" XKB information, the following lookup will be
172 * Neither Mode_switch nor ISO_Level3_Shift active: group 1, column 0 and 1
173 * Mode_switch active: group 2, column 0 and 1
174 * ISO_Level3_Shift active: group 1, column 2 and 3
176 * Using the column index which xcb_key_press_lookup_keysym uses (and
177 * xmodmap prints out), the following lookup will be performed:
179 * Neither Mode_switch nor ISO_Level3_Shift active: column 0 and 1
180 * Mode_switch active: column 2 and 3
181 * ISO_Level3_Shift active: column 4 and 5
184 if (modeswitch_active)
186 if (iso_level3_shift_active)
188 sym0 = xcb_key_press_lookup_keysym(symbols, event, base_column);
189 sym1 = xcb_key_press_lookup_keysym(symbols, event, base_column + 1);
192 DEBUG("Mode switch enabled\n");
193 modeswitch_active = true;
195 case XK_ISO_Level3_Shift:
196 DEBUG("ISO_Level3_Shift enabled\n");
197 iso_level3_shift_active = true;
204 password[input_position] = '\0';
208 if (input_position == 0)
211 /* decrement input_position to point to the previous glyph */
212 u8_dec(password, &input_position);
213 password[input_position] = '\0';
214 //printf("new input position = %d, new password = %s\n", input_position, password);
218 if ((input_position + 8) >= sizeof(password))
221 if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) {
222 /* this key was a keypad key */
223 if ((event->state & XCB_MOD_MASK_SHIFT))
227 if ((event->state & XCB_MOD_MASK_SHIFT))
233 /* FIXME: handle all of these? */
234 printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
235 printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
236 printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
237 printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
238 printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
239 printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
240 printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
243 if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
246 DEBUG("resolved to keysym = %c (%d)\n", sym, sym);
248 /* convert the keysym to UCS */
249 uint16_t ucs = keysym2ucs(sym);
250 if ((int16_t)ucs == -1) {
251 fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
255 /* store the UCS in a string to convert it */
256 uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
257 DEBUG("input part = %s\n", inp);
259 /* store it in the password array as UTF-8 */
260 input_position += convert_ucs_to_utf8((char*)inp, password + input_position);
261 password[input_position] = '\0';
262 DEBUG("current password = %s\n", password);
266 * A visibility notify event will be received when the visibility (= can the
267 * user view the complete window) changes, so for example when a popup overlays
268 * some area of the i3lock window.
270 * In this case, we raise our window on top so that the popup (or whatever is
271 * hiding us) gets hidden.
274 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
275 if (event->state != XCB_VISIBILITY_UNOBSCURED) {
276 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
277 xcb_configure_window(conn, event->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
283 * Called when the keyboard mapping changes. We update our symbols.
286 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
287 xcb_refresh_keyboard_mapping(symbols, event);
289 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
290 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
294 * Called when the properties on the root window change, e.g. when the screen
295 * resolution changes. If so we update the window to cover the whole screen
296 * and also redraw the image, if any.
299 void handle_screen_resize(xcb_visualtype_t *vistype, xcb_window_t win, uint32_t* last_resolution, char* color) {
300 xcb_get_geometry_cookie_t geomc;
301 xcb_get_geometry_reply_t *geom;
302 geomc = xcb_get_geometry(conn, scr->root);
303 if ((geom = xcb_get_geometry_reply(conn, geomc, 0)) == NULL) {
307 if (last_resolution[0] == geom->width && last_resolution[1] == geom->height)
310 last_resolution[0] = geom->width;
311 last_resolution[1] = geom->height;
315 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution, color);
316 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
320 uint32_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
321 xcb_configure_window(conn, win, mask, last_resolution);
326 * Callback function for PAM. We only react on password request callbacks.
329 static int conv_callback(int num_msg, const struct pam_message **msg,
330 struct pam_response **resp, void *appdata_ptr)
335 /* PAM expects an array of responses, one for each message */
336 if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) {
341 for (int c = 0; c < num_msg; c++) {
342 if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF &&
343 msg[c]->msg_style != PAM_PROMPT_ECHO_ON)
346 /* return code is currently not used but should be set to zero */
347 resp[c]->resp_retcode = 0;
348 if ((resp[c]->resp = strdup(password)) == NULL) {
357 int main(int argc, char *argv[]) {
358 bool dont_fork = false;
360 char color[7] = "ffffff";
363 char *image_path = NULL;
366 struct pam_conv conv = {conv_callback, NULL};
368 xcb_visualtype_t *vistype;
369 xcb_generic_event_t *event;
371 int curs_choice = CURS_NONE;
374 struct option longopts[] = {
375 {"version", no_argument, NULL, 'v'},
376 {"nofork", no_argument, NULL, 'n'},
377 {"beep", no_argument, NULL, 'b'},
378 {"dpms", no_argument, NULL, 'd'},
379 {"color", required_argument, NULL, 'c'},
380 {"pointer", required_argument, NULL , 'p'},
381 {"debug", no_argument, NULL, 0},
382 {"help", no_argument, NULL, 'h'},
384 {"image", required_argument, NULL, 'i'},
385 {"tiling", no_argument, NULL, 't'},
387 {NULL, no_argument, NULL, 0}
390 if ((username = getenv("USER")) == NULL)
391 errx(1, "USER environment variable not set, please set it.\n");
393 while ((o = getopt_long(argc, argv, "hvnbdc:p:"
397 , longopts, &optind)) != -1) {
400 errx(EXIT_SUCCESS, "version " VERSION " © 2010-2011 Michael Stapelberg");
413 /* Skip # if present */
417 if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1)
418 errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n");
424 image_path = strdup(optarg);
431 if (!strcmp(optarg, "win")) {
432 curs_choice = CURS_WIN;
433 } else if (!strcmp(optarg, "default")) {
434 curs_choice = CURS_DEFAULT;
436 errx(1, "i3lock: Invalid pointer type given. Expected one of \"win\" or \"default\".\n");
440 if (strcmp(longopts[optind].name, "debug") == 0)
444 errx(1, "Syntax: i3lock [-v] [-n] [-b] [-d] [-c color] [-p win|default]"
446 " [-i image.png] [-t]"
448 " (compiled with NOLIBCAIRO)"
455 ret = pam_start("i3lock", username, &conv, &pam_handle);
456 if (ret != PAM_SUCCESS)
457 errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret));
459 /* Initialize connection to X11 */
460 if ((conn = xcb_connect(NULL, &screen)) == NULL ||
461 xcb_connection_has_error(conn))
462 errx(EXIT_FAILURE, "Could not connect to X11, maybe you need to set DISPLAY?");
465 /* In the parent process, we exit */
470 /* if DPMS is enabled, check if the X server really supports it */
472 xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn);
473 xcb_dpms_capable_reply_t *dpmsr;
474 if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) {
475 fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n");
480 scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
481 vistype = get_root_visual_type(scr);
483 uint32_t last_resolution[2] = {scr->width_in_pixels, scr->height_in_pixels};
489 /* Create a pixmap to render on, fill it with the background color */
490 img = cairo_image_surface_create_from_png(image_path);
494 /* Pixmap on which the image is rendered to (if any) */
495 xcb_pixmap_t bg_pixmap = draw_image(vistype, last_resolution, color);
497 /* open the fullscreen window, already with the correct pixmap in place */
498 win = open_fullscreen_window(conn, scr, color, bg_pixmap);
500 cursor = create_cursor(conn, scr, win, curs_choice);
502 grab_pointer_and_keyboard(conn, scr, cursor);
504 symbols = xcb_key_symbols_alloc(conn);
505 modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
506 numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
509 dpms_turn_off_screen(conn);
511 while ((event = xcb_wait_for_event(conn))) {
512 if (event->response_type == 0)
513 errx(1, "XCB: Invalid event received");
515 /* Strip off the highest bit (set if the event is generated) */
516 int type = (event->response_type & 0x7F);
518 if (type == XCB_KEY_PRESS) {
519 handle_key_press((xcb_key_press_event_t*)event);
523 if (type == XCB_KEY_RELEASE) {
524 handle_key_release((xcb_key_release_event_t*)event);
526 /* If this was the backspace or escape key we are back at an
527 * empty input, so turn off the screen if DPMS is enabled */
528 if (dpms && input_position == 0)
529 dpms_turn_off_screen(conn);
534 if (type == XCB_VISIBILITY_NOTIFY) {
535 handle_visibility_notify((xcb_visibility_notify_event_t*)event);
539 if (type == XCB_MAPPING_NOTIFY) {
540 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
544 if (type == XCB_CONFIGURE_NOTIFY) {
545 handle_screen_resize(vistype, win, last_resolution, color);
549 printf("WARNING: unhandled event of type %d\n", type);