From 1dc3fd7bf000b57f8462416ae3e17f2f580d2020 Mon Sep 17 00:00:00 2001 From: Michael Stapelberg Date: Fri, 16 Jul 2010 17:35:51 +0200 Subject: Initial commit of the XCB rewrite of i3lock Changes: - Uses XCB instead of Xlib (like i3), thus cleaner/faster code - Uses cairo to load PNG images (*much* faster than XPM) --- i3lock.c | 658 +++++++++++++++++++++++++++++---------------------------------- 1 file changed, 303 insertions(+), 355 deletions(-) (limited to 'i3lock.c') diff --git a/i3lock.c b/i3lock.c index 7daf9ba..8064595 100644 --- a/i3lock.c +++ b/i3lock.c @@ -1,128 +1,169 @@ /* - * vim:ts=8:expandtab + * vim:ts=4:sw=4:expandtab * - * i3lock - an improved version of slock + * © 2010 Michael Stapelberg * - * i3lock © 2009 Michael Stapelberg and contributors - * i3lock © 2009 Jan-Erik Rediger - * slock © 2006-2008 Anselm R Garbe - * - * See file LICENSE for license information. - * - * Note that on any error (calloc is out of memory for example) - * we do not do anything so that the user can fix the error by - * himself (kill X to get more free memory or stop some other - * program using SSH/console). + * See LICENSE for licensing information * */ -#define _XOPEN_SOURCE 500 - -#include -#include -#include #include -#include +#include #include -#include #include -#include -#include -#include -#include -#include -#include #include -#include +#include +#include +#include +#include +#include #include - +#include +#include #include +/* FIXME: can we get rid of this header? */ +#include +#include +#include -#include "cursors.h" - -static char passwd[256]; - -/* - * displays an xpm image tiled over the whole screen - * (the image will be visible on all screens - * when using a multi monitor setup) - * - */ -static void tile_image(XpmImage *image, int disp_height, int disp_width, - Display *dpy, Pixmap pix, Window w, GC gc) -{ - int rows = (int)ceil(disp_height / (float)image->height), - cols = (int)ceil(disp_width / (float)image->width); - - for (int y = 0; y < rows; y++) { - for (int x = 0; x < cols; x++) { - XCopyArea(dpy, pix, w, gc, 0, 0, - image->width, image->height, - image->width * x, image->height * y); - } - } +#include "keysym2ucs.h" +#include "ucs2_to_utf8.h" +#include "xcb.h" + +static xcb_connection_t *conn; +static xcb_key_symbols_t *symbols; +static cairo_t *ctx = NULL; +static pam_handle_t *pam_handle; +static int input_position = 0; +/* holds the password you enter (in UTF-8) */ +static char password[512]; +static bool modeswitch_active = false; +static int modeswitchmask; +static int numlockmask; +static bool beep = false; + +static void input_done() { + if (input_position == 0) + return; + + /* TODO: change cursor during authentication? */ + if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) { + printf("successfully authenticated\n"); + exit(0); + } + + /* beep on authentication failure, if enabled */ + if (beep) { + xcb_bell(conn, 100); + xcb_flush(conn); + } } /* - * Returns the colorpixel to use for the given hex color (think of HTML). - * - * The hex_color may not start with #, for example FF00FF works. - * - * NOTE that get_colorpixel() does _NOT_ check the given color code for validity. - * This has to be done by the caller. + * Called when we should draw the image (if any). * */ -static uint32_t get_colorpixel(char *hex) { - char strgroups[3][3] = {{hex[0], hex[1], '\0'}, - {hex[2], hex[3], '\0'}, - {hex[4], hex[5], '\0'}}; - uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)), - (strtol(strgroups[1], NULL, 16)), - (strtol(strgroups[2], NULL, 16))}; - - return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2]; +static void handle_expose_event() { + if (!ctx) + return; + + cairo_paint(ctx); + xcb_flush(conn); } /* - * Check if given file can be opened => exists + * Called when the user releases a key. We need to leave the Mode_switch + * state when the user releases the Mode_switch key. * */ -static bool file_exists(const char *filename) -{ - FILE * file = fopen(filename, "r"); - if(file) - { - fclose(file); - return true; - } - return false; +static void handle_key_release(xcb_key_release_event_t *event) { + printf("releasing %d, state raw = %d\n", event->detail, event->state); + + /* fix state */ + event->state &= ~numlockmask; + + xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state); + if (sym == XK_Mode_switch) { + printf("Mode switch disabled\n"); + modeswitch_active = false; + } } /* - * Puts the given XPM error code to stderr + * Handle key presses. Fixes state, then looks up the key symbol for the + * given keycode, then looks up the key symbol (as UCS-2), converts it to + * UTF-8 and stores it in the password array. * */ -static void print_xpm_error(int err) -{ - switch (err) { - case XpmColorError: - fprintf(stderr, "XPM: Could not parse or alloc requested color\n"); - break; - case XpmOpenFailed: - fprintf(stderr, "XPM: Cannot open file\n"); - break; - case XpmFileInvalid: - fprintf(stderr, "XPM: invalid XPM file\n"); - break; - case XpmNoMemory: - fprintf(stderr, "XPM: Not enough memory\n"); - break; - case XpmColorFailed: - fprintf(stderr, "XPM: Color not found\n"); - break; - } +static void handle_key_press(xcb_key_press_event_t *event) { + printf("keypress %d, state raw = %d\n", event->detail, event->state); + + /* fix state */ + if (modeswitch_active) + event->state |= modeswitchmask; + + /* Apparantly, after activating numlock once, the numlock modifier + * stays turned on (use xev(1) to verify). So, to resolve useful + * keysyms, we remove the numlock flag from the event state */ + event->state &= ~numlockmask; + + if ((input_position + 8) >= sizeof(password)) + return; + + xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state); + switch (sym) { + case XK_Mode_switch: + printf("Mode switch enabled\n"); + modeswitch_active = true; + return; + + case XK_Return: + input_done(); + case XK_Escape: + input_position = 0; + password[input_position] = '\0'; + return; + + case XK_BackSpace: + if (input_position == 0) + return; + + /* decrement input_position to point to the previous glyph */ + u8_dec(password, &input_position); + password[input_position] = '\0'; + printf("new input position = %d, new password = %s\n", input_position, password); + return; + } + + /* FIXME: handle all of these? */ + printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym)); + printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym)); + printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym)); + printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym)); + printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym)); + printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym)); + printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym)); + + if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym)) + return; + + printf("sym = %c (%d)\n", sym, sym); + + /* convert the keysym to UCS */ + uint16_t ucs = keysym2ucs(sym); + if ((int16_t)ucs == -1) { + fprintf(stderr, "Keysym could not be converted to UCS, skipping\n"); + return; + } + + /* store the UCS in a string to convert it */ + uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0}; + + /* store it in the password array as UTF-8 */ + input_position += convert_ucs_to_utf8((char*)inp, password + input_position); + password[input_position] = '\0'; + printf("current password = %s\n", password); } - /* * Callback function for PAM. We only react on password request callbacks. * @@ -130,278 +171,185 @@ static void print_xpm_error(int err) static int conv_callback(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr) { - if (num_msg == 0) - return 1; - - /* PAM expects an arry of responses, one for each message */ - if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) { - perror("calloc"); - return 1; + if (num_msg == 0) + return 1; + + /* PAM expects an arry of responses, one for each message */ + if ((*resp = calloc(num_msg, sizeof(struct pam_message))) == NULL) { + perror("calloc"); + return 1; + } + + for (int c = 0; c < num_msg; c++) { + if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF && + msg[c]->msg_style != PAM_PROMPT_ECHO_ON) + continue; + + /* return code is currently not used but should be set to zero */ + resp[c]->resp_retcode = 0; + if ((resp[c]->resp = strdup(password)) == NULL) { + perror("strdup"); + return 1; } + } - for (int c = 0; c < num_msg; c++) { - if (msg[c]->msg_style != PAM_PROMPT_ECHO_OFF && - msg[c]->msg_style != PAM_PROMPT_ECHO_ON) - continue; - - /* return code is currently not used but should be set to zero */ - resp[c]->resp_retcode = 0; - if ((resp[c]->resp = strdup(passwd)) == NULL) { - perror("strdup"); - return 1; - } - } - - return 0; + return 0; } -int main(int argc, char *argv[]) -{ - char buf[32]; - char *username; - int num, screen; - - unsigned int len; - bool running = true; - - /* By default, fork, don’t beep and don’t turn off monitor */ - bool dont_fork = false; - bool beep = false; - bool dpms = false; - bool xpm_image = false; - bool tiling = false; - char xpm_image_path[256]; - char color[7] = "ffffff"; // white - - unsigned char *curs = NULL; - unsigned char *mask = NULL; - unsigned int curs_w, curs_h; - - Cursor cursor; - Display *dpy; - KeySym ksym; - Pixmap px_curs; - Pixmap px_mask; - Window root, w; - XColor black, white, dummy; - XEvent ev; - XSetWindowAttributes wa; - - pam_handle_t *handle; - struct pam_conv conv = {conv_callback, NULL}; - - char opt; - int optind = 0; - static struct option long_options[] = { - {"version", no_argument, NULL, 'v'}, - {"nofork", no_argument, NULL, 'n'}, - {"beep", no_argument, NULL, 'b'}, - {"dpms", no_argument, NULL, 'd'}, - {"image", required_argument, NULL, 'i'}, - {"color", required_argument, NULL, 'c'}, - {"tiling", no_argument, NULL, 't'}, - {"pointer", required_argument, NULL , 'p'}, - {NULL, no_argument, NULL, 0} - }; - curs = curs_invisible_bits; - mask = curs_invisible_bits; - curs_w = curs_invisible_width; - curs_h = curs_invisible_height; - - while ((opt = getopt_long(argc, argv, "vnbdi:c:tp:", long_options, &optind)) != -1) { - switch (opt) { - case 'v': - errx(0, "i3lock-"VERSION", © 2009 Michael Stapelberg\n" - "based on slock, which is © 2006-2008 Anselm R Garbe\n"); - case 'n': - dont_fork = true; - break; - case 'b': - beep = true; - break; - case 'd': - dpms = true; - break; - case 'i': - strncpy(xpm_image_path, optarg, 255); - xpm_image = true; - break; - case 'c': - { - char *arg = optarg; - /* Skip # if present */ - if (arg[0] == '#') - arg++; - - if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1) - errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n"); - - break; - } - case 't': - tiling = true; - break; - case 'p': - if (!strcmp(optarg, "default")) { - curs = NULL; - break; - } - if (!strcmp(optarg, "win")) { - curs = curs_windows_bits; - mask = mask_windows_bits; - curs_w = curs_windows_width; - curs_h = curs_windows_height; - break; - } - break; - default: - errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.xpm] [-c color] [-t] [-p win|default]\n"); - } +int main(int argc, char *argv[]) { + bool dont_fork = false; + bool dpms = false; + char color[7] = "ffffff"; + char *username; + char *image_path = NULL; + int ret; + struct pam_conv conv = {conv_callback, NULL}; + int screen; + cairo_surface_t *img = NULL; + xcb_visualtype_t *vistype; + xcb_generic_event_t *event; + xcb_screen_t *scr; + xcb_window_t win; + char o; + int optind = 0; + struct option longopts[] = { + {"version", no_argument, NULL, 'v'}, + {"nofork", no_argument, NULL, 'n'}, + {"beep", no_argument, NULL, 'b'}, + {"dpms", no_argument, NULL, 'd'}, + {"image", required_argument, NULL, 'i'}, + {"color", required_argument, NULL, 'c'}, + {"tiling", no_argument, NULL, 't'}, + {"pointer", required_argument, NULL , 'p'}, + {NULL, no_argument, NULL, 0} + }; + + if ((username = getenv("USER")) == NULL) + errx(1, "USER environment variable not set, please set it.\n"); + + while ((o = getopt_long(argc, argv, "vnbdi:c:tp:", longopts, &optind)) != -1) { + switch (o) { + case 'v': + errx(EXIT_SUCCESS, "i3lock © 2010 Michael Stapelberg\n"); + case 'n': + dont_fork = true; + break; + case 'b': + beep = true; + break; + case 'd': + dpms = true; + break; + case 'i': + image_path = strdup(optarg); + break; + case 'c': { + char *arg = optarg; + + /* Skip # if present */ + if (arg[0] == '#') + arg++; + + if (strlen(arg) != 6 || sscanf(arg, "%06[0-9a-fA-F]", color) != 1) + errx(1, "color is invalid, color must be given in 6-byte format: rrggbb\n"); + + break; + } + case 't': + /* TODO: tile image */ + break; + case 'p': + /* TODO: cursor */ + break; + default: + errx(1, "i3lock: Unknown option. Syntax: i3lock [-v] [-n] [-b] [-d] [-i image.png] [-c color] [-t] [-p win|default]\n"); } + } + + /* Initialize PAM */ + ret = pam_start("i3lock", username, &conv, &pam_handle); + if (ret != PAM_SUCCESS) + errx(EXIT_FAILURE, "PAM: %s\n", pam_strerror(pam_handle, ret)); + + /* Initialize connection to X11 */ + if ((conn = xcb_connect(NULL, &screen)) == NULL) + err(EXIT_FAILURE, "xcb_connect()"); + + if (!dont_fork) { + /* In the parent process, we exit */ + if (fork() != 0) + return 0; + } + + /* if DPMS is enabled, check if the X server really supports it */ + if (dpms) { + xcb_dpms_capable_cookie_t dpmsc = xcb_dpms_capable(conn); + xcb_dpms_capable_reply_t *dpmsr; + if ((dpmsr = xcb_dpms_capable_reply(conn, dpmsc, NULL)) && !dpmsr->capable) { + fprintf(stderr, "Disabling DPMS, X server not DPMS capable\n"); + dpms = false; + } + } - if ((username = getenv("USER")) == NULL) - errx(1, "USER environment variable not set, please set it.\n"); + scr = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; + vistype = get_root_visual_type(scr); - int ret = pam_start("i3lock", username, &conv, &handle); - if (ret != PAM_SUCCESS) - errx(1, "PAM: %s\n", pam_strerror(handle, ret)); + /* open the fullscreen window and flush immediately afterwards so that X11 + * can generate an expose event while we load the PNG file (so that we are + * ready to handle the expose event immediately afterwards) */ + win = open_fullscreen_window(conn, scr, color); - if(!(dpy = XOpenDisplay(0))) - errx(1, "i3lock: cannot open display\n"); - screen = DefaultScreen(dpy); - root = RootWindow(dpy, screen); + grab_pointer_and_keyboard(conn, scr); - if (!dont_fork) { - if (fork() != 0) - return 0; - } + if (image_path) + img = cairo_image_surface_create_from_png(image_path); - /* init */ - wa.override_redirect = 1; - wa.background_pixel = get_colorpixel(color); - w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen), - 0, DefaultDepth(dpy, screen), CopyFromParent, - DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa); - XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy); - XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "white", &white, &dummy); - if (curs != NULL) { - px_curs = XCreateBitmapFromData(dpy, w, (char*) curs, curs_w, curs_h); - px_mask = XCreateBitmapFromData(dpy, w, (char*) mask, curs_w, curs_h); - cursor = XCreatePixmapCursor(dpy, px_curs, px_mask, &white, &black, 0, 0); - XDefineCursor(dpy, w, cursor); - } else { - px_curs = 0; - px_mask = 0; - cursor = 0; - } - XMapRaised(dpy, w); - - if (xpm_image && file_exists(xpm_image_path)) { - GC gc = XDefaultGC(dpy, 0); - int depth = DefaultDepth(dpy, screen); - int disp_width = DisplayWidth(dpy, screen); - int disp_height = DisplayHeight(dpy, screen); - Pixmap pix = XCreatePixmap(dpy, w, disp_width, disp_height, depth); - XpmImage xpm_image; - XpmInfo xpm_info; - - int err = XpmReadFileToXpmImage(xpm_image_path, &xpm_image, &xpm_info); - if (err != 0) { - print_xpm_error(err); - return 1; - } - - err = XpmCreatePixmapFromXpmImage(dpy, w, &xpm_image, &pix, 0, 0); - if (err != 0) { - print_xpm_error(err); - return 1; - } - - if (tiling) - tile_image(&xpm_image, disp_height, disp_width, dpy, pix, w, gc); - else - XCopyArea(dpy, pix, w, gc, 0, 0, disp_width, disp_height, 0, 0); - } + symbols = xcb_key_symbols_alloc(conn); + modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch); + numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock); - for(len = 1000; len; len--) { - if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask, - GrabModeAsync, GrabModeAsync, None, cursor, CurrentTime) == GrabSuccess) - break; - usleep(1000); - } - if((running = running && (len > 0))) { - for(len = 1000; len; len--) { - if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime) - == GrabSuccess) - break; - usleep(1000); - } - running = (len > 0); + + if (img) { + /* Initialize cairo */ + cairo_surface_t *output; + output = cairo_xcb_surface_create(conn, win, vistype, + scr->width_in_pixels, scr->height_in_pixels); + /* TODO: tiling of the image */ + ctx = cairo_create(output); + cairo_set_source_surface(ctx, img, 0, 0); + + handle_expose_event(); + } + + if (dpms) + dpms_turn_off_screen(conn); + + while ((event = xcb_wait_for_event(conn))) { + int type = x_event_type(event); + + if (type == XCB_EXPOSE) { + handle_expose_event(); + continue; } - len = 0; - XSync(dpy, False); - - /* main event loop */ - while(running && !XNextEvent(dpy, &ev)) { - if (len == 0 && dpms && DPMSCapable(dpy)) { - DPMSEnable(dpy); - DPMSForceLevel(dpy, DPMSModeOff); - } - - if(ev.type != KeyPress) - continue; - - buf[0] = 0; - num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0); - if(IsKeypadKey(ksym)) { - if(ksym == XK_KP_Enter) - ksym = XK_Return; - else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) - ksym = (ksym - XK_KP_0) + XK_0; - } - if(IsFunctionKey(ksym) || - IsKeypadKey(ksym) || - IsMiscFunctionKey(ksym) || - IsPFKey(ksym) || - IsPrivateKeypadKey(ksym)) - continue; - switch(ksym) { - case XK_Return: - passwd[len] = 0; - /* Skip empty passwords */ - if (len == 0) - continue; - if ((ret = pam_authenticate(handle, 0)) == PAM_SUCCESS) - running = false; - else { - fprintf(stderr, "PAM: %s\n", pam_strerror(handle, ret)); - if (beep) - XBell(dpy, 100); - } - len = 0; - break; - case XK_Escape: - len = 0; - break; - case XK_BackSpace: - if (len > 0) - len--; - break; - default: - if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) { - memcpy(passwd + len, buf, num); - len += num; - } - break; - } + + if (type == XCB_KEY_PRESS) { + handle_key_press((xcb_key_press_event_t*)event); + continue; } - XUngrabPointer(dpy, CurrentTime); - if (px_curs != 0) { - XFreePixmap(dpy, px_curs); - XFreePixmap(dpy, px_mask); + if (type == XCB_KEY_RELEASE) { + handle_key_release((xcb_key_release_event_t*)event); + + /* If this was the backspace or escape key we are back at an + * empty input, so turn off the screen if DPMS is enabled */ + if (dpms && input_position == 0) + dpms_turn_off_screen(conn); + + continue; } - XDestroyWindow(dpy, w); - XCloseDisplay(dpy); - return 0; + + printf("WARNING: unhandled event of type %d\n", type); + } + + return 0; } -- cgit v1.1