X-Git-Url: https://git.datadissipation.net/herbe/blobdiff_plain/6a655a7cbd0a0d8e0e6a89e6c82b7787ab27dd59..6abd6e39859360f4bc40db80b3bf28a6551b3c79:/herbe.c diff --git a/herbe.c b/herbe.c index 3c65b5e..42e7d73 100644 --- a/herbe.c +++ b/herbe.c @@ -4,70 +4,114 @@ #include #include #include +#include +#include +#include +#include #include "config.h" +#define EXIT_ACTION 3 + Display *display; Window window; +int exit_code = EXIT_SUCCESS; -int get_eol(char *body, XftFont *font) +static void die(const char *format, ...) { - int body_len = strlen(body); + va_list ap; + va_start(ap, format); + vfprintf(stderr, format, ap); + fprintf(stderr, "\n"); + va_end(ap); + exit(EXIT_FAILURE); +} + +int get_max_len(char *body, XftFont *font, int max_text_width) +{ + int eol = strlen(body); XGlyphInfo info; - XftTextExtentsUtf8(display, font, body, body_len, &info); + XftTextExtentsUtf8(display, font, (FcChar8 *)body, eol, &info); - int max_text_width = width - 2 * padding; + if (info.width > max_text_width) + { + eol = max_text_width / font->max_advance_width; + info.width = 0; + + while (info.width < max_text_width) + { + eol++; + XftTextExtentsUtf8(display, font, (FcChar8 *)body, eol, &info); + } + + eol--; + } + + for (int i = 0; i < eol; i++) + if (body[i] == '\n') + { + body[i] = ' '; + return ++i; + } if (info.width < max_text_width) - return body_len; + return eol; - int eol = max_text_width / font->max_advance_width; - info.width = 0; + int temp = eol; - while (info.width < max_text_width) - { - eol++; - XftTextExtentsUtf8(display, font, body, eol, &info); - } + while (body[eol] != ' ' && eol) + --eol; - return --eol; + if (eol == 0) + return temp; + else + return ++eol; } -void expire() +void expire(int sig) { XEvent event; event.type = ButtonPress; + event.xbutton.button = (sig == SIGUSR2) ? (ACTION_BUTTON) : (DISMISS_BUTTON); XSendEvent(display, window, 0, 0, &event); XFlush(display); } int main(int argc, char *argv[]) { - if (argc != 2) + if (argc == 1) { - fprintf(stderr, "Usage: herbe message\n"); - exit(EXIT_FAILURE); + sem_unlink("/herbe"); + die("Usage: %s body", argv[0]); } - char *body = argv[1]; + struct sigaction act_expire, act_ignore; + act_expire.sa_handler = expire; + act_expire.sa_flags = SA_RESTART; + sigemptyset(&act_expire.sa_mask); - signal(SIGALRM, expire); - alarm(duration); + act_ignore.sa_handler = SIG_IGN; + act_ignore.sa_flags = 0; + sigemptyset(&act_ignore.sa_mask); - display = XOpenDisplay(NULL); + sigaction(SIGALRM, &act_expire, 0); + sigaction(SIGTERM, &act_expire, 0); + sigaction(SIGINT, &act_expire, 0); - if (display == NULL) - { - fprintf(stderr, "Cannot open display\n"); - exit(EXIT_FAILURE); - } + sigaction(SIGUSR1, &act_ignore, 0); + sigaction(SIGUSR2, &act_ignore, 0); + + display = XOpenDisplay(0); + + if (display == 0) + die("Cannot open display"); int screen = DefaultScreen(display); Visual *visual = DefaultVisual(display, screen); Colormap colormap = DefaultColormap(display, screen); - int window_width = DisplayWidth(display, screen); - int window_height = DisplayHeight(display, screen); + int screen_width = DisplayWidth(display, screen); + int screen_height = DisplayHeight(display, screen); XftColor color; @@ -80,27 +124,46 @@ int main(int argc, char *argv[]) XftFont *font = XftFontOpenName(display, screen, font_pattern); - unsigned int x = pos_x; - unsigned int y = pos_y; - unsigned int height = font->ascent - font->descent + padding * 2; + int num_of_lines = 0; + int max_text_width = width - 2 * padding; + int words_size = 5; + char **words = malloc(words_size * sizeof(char *)); + if (!words) + die("malloc failed"); - switch (corner) + for (int i = 1; i < argc; i++) { - case BOTTOM_RIGHT: - y = window_height - height - border_size * 2 - pos_y; - case TOP_RIGHT: - x = window_width - width - border_size * 2 - pos_x; - break; - case BOTTOM_LEFT: - y = window_height - height - border_size * 2 - pos_y; + char *body = argv[i]; + + for (unsigned int eol = get_max_len(body, font, max_text_width); eol <= strlen(body) && eol; body += eol, num_of_lines++, eol = get_max_len(body, font, max_text_width)) + { + if (words_size <= num_of_lines) + { + words = realloc(words, (words_size += 5) * sizeof(char *)); + if (!words) + die("malloc failed"); + } + words[num_of_lines] = malloc((eol + 1) * sizeof(char)); + if (!words[num_of_lines]) + die("malloc failed"); + strncpy(words[num_of_lines], body, eol); + words[num_of_lines][eol] = '\0'; + } } - window = XCreateWindow( - display, RootWindow(display, screen), x, - y, width, height, border_size, - DefaultDepth(display, screen), CopyFromParent, - visual, - CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes); + unsigned int x = pos_x; + unsigned int y = pos_y; + unsigned int text_height = font->ascent - font->descent; + unsigned int height = (num_of_lines - 1) * line_spacing + num_of_lines * text_height + 2 * padding; + + if (corner == TOP_RIGHT || corner == BOTTOM_RIGHT) + x = screen_width - width - border_size * 2 - pos_x; + + if (corner == BOTTOM_LEFT || corner == BOTTOM_RIGHT) + y = screen_height - height - border_size * 2 - pos_y; + + window = XCreateWindow(display, RootWindow(display, screen), x, y, width, height, border_size, DefaultDepth(display, screen), CopyFromParent, visual, + CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes); XftDraw *draw = XftDrawCreate(display, window, visual, colormap); XftColorAllocName(display, visual, colormap, font_color, &color); @@ -109,27 +172,49 @@ int main(int argc, char *argv[]) XMapWindow(display, window); - int eol = get_eol(body, font); + sem_t *mutex = sem_open("/herbe", O_CREAT, 0644, 1); + sem_wait(mutex); - XEvent event; + sigaction(SIGUSR1, &act_expire, 0); + sigaction(SIGUSR2, &act_expire, 0); + + if (duration != 0) + alarm(duration); while (1) { + XEvent event; XNextEvent(display, &event); if (event.type == Expose) { XClearWindow(display, window); - XftDrawStringUtf8(draw, &color, font, padding, height - padding, body, eol); + for (int i = 0; i < num_of_lines; i++) + XftDrawStringUtf8(draw, &color, font, padding, line_spacing * i + text_height * (i + 1) + padding, (FcChar8 *)words[i], strlen(words[i])); } if (event.type == ButtonPress) - break; + { + if (event.xbutton.button == DISMISS_BUTTON) + break; + else if (event.xbutton.button == ACTION_BUTTON) + { + exit_code = EXIT_ACTION; + break; + } + } } + sem_post(mutex); + sem_close(mutex); + + for (int i = 0; i < num_of_lines; i++) + free(words[i]); + + free(words); XftDrawDestroy(draw); XftColorFree(display, visual, colormap, &color); XftFontClose(display, font); - XCloseDisplay(display); - return EXIT_SUCCESS; + + exit(exit_code); } \ No newline at end of file