/* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE) * * i3-nagbar is a utility which displays a nag message, for example in the case * when the user has an error in his configuration file. * */ #include <stdio.h> #include <sys/types.h> #include <sys/wait.h> #include <stdlib.h> #include <stdbool.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <err.h> #include <stdint.h> #include <getopt.h> #include <limits.h> #include <xcb/xcb.h> #include <xcb/xcb_aux.h> #include <xcb/xcb_event.h> #include "libi3.h" #include "i3-nagbar.h" typedef struct { i3String *label; char *action; int16_t x; uint16_t width; } button_t; static xcb_window_t win; static xcb_pixmap_t pixmap; static xcb_gcontext_t pixmap_gc; static xcb_rectangle_t rect = { 0, 0, 600, 20 }; static i3Font font; static i3String *prompt; static button_t *buttons; static int buttoncnt; /* Result of get_colorpixel() for the various colors. */ static uint32_t color_background; /* background of the bar */ static uint32_t color_button_background; /* background for buttons */ static uint32_t color_border; /* color of the button border */ static uint32_t color_border_bottom; /* color of the bottom border */ static uint32_t color_text; /* color of the text */ xcb_window_t root; xcb_connection_t *conn; xcb_screen_t *root_screen; /* * Having verboselog() and errorlog() is necessary when using libi3. * */ void verboselog(char *fmt, ...) { va_list args; va_start(args, fmt); vfprintf(stdout, fmt, args); va_end(args); } void errorlog(char *fmt, ...) { va_list args; va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); } /* * Starts the given application by passing it through a shell. We use double fork * to avoid zombie processes. As the started application’s parent exits (immediately), * the application is reparented to init (process-id 1), which correctly handles * childs, so we don’t have to do it :-). * * The shell is determined by looking for the SHELL environment variable. If it * does not exist, /bin/sh is used. * */ static void start_application(const char *command) { printf("executing: %s\n", command); if (fork() == 0) { /* Child process */ setsid(); if (fork() == 0) { /* Stores the path of the shell */ static const char *shell = NULL; if (shell == NULL) if ((shell = getenv("SHELL")) == NULL) shell = "/bin/sh"; /* This is the child */ execl(shell, shell, "-c", command, (void*)NULL); /* not reached */ } exit(0); } wait(0); } static button_t *get_button_at(int16_t x, int16_t y) { for (int c = 0; c < buttoncnt; c++) if (x >= (buttons[c].x) && x <= (buttons[c].x + buttons[c].width)) return &buttons[c]; return NULL; } static void handle_button_press(xcb_connection_t *conn, xcb_button_press_event_t *event) { printf("button pressed on x = %d, y = %d\n", event->event_x, event->event_y); /* TODO: set a flag for the button, re-render */ } /* * Called when the user releases the mouse button. Checks whether the * coordinates are over a button and executes the appropriate action. * */ static void handle_button_release(xcb_connection_t *conn, xcb_button_release_event_t *event) { printf("button released on x = %d, y = %d\n", event->event_x, event->event_y); /* If the user hits the close button, we exit(0) */ if (event->event_x >= (rect.width - 32)) exit(0); button_t *button = get_button_at(event->event_x, event->event_y); if (!button) return; start_application(button->action); /* TODO: unset flag, re-render */ } /* * Handles expose events (redraws of the window) and rendering in general. Will * be called from the code with event == NULL or from X with event != NULL. * */ static int handle_expose(xcb_connection_t *conn, xcb_expose_event_t *event) { /* re-draw the background */ xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_background }); xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &rect); /* restore font color */ set_font_colors(pixmap_gc, color_text, color_background); draw_text(prompt, pixmap, pixmap_gc, 4 + 4, 4 + 4, rect.width - 4 - 4); /* render close button */ int line_width = 4; int w = 20; int y = rect.width; uint32_t values[3]; values[0] = color_button_background; values[1] = line_width; xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values); xcb_rectangle_t close = { y - w - (2 * line_width), 0, w + (2 * line_width), rect.height }; xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close); xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border }); xcb_point_t points[] = { { y - w - (2 * line_width), line_width / 2 }, { y - (line_width / 2), line_width / 2 }, { y - (line_width / 2), (rect.height - (line_width / 2)) - 2 }, { y - w - (2 * line_width), (rect.height - (line_width / 2)) - 2 }, { y - w - (2 * line_width), line_width / 2 } }; xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points); values[0] = 1; set_font_colors(pixmap_gc, color_text, color_button_background); draw_text_ascii("X", pixmap, pixmap_gc, y - w - line_width + w / 2 - 4, 4 + 4 - 1, rect.width - y + w + line_width - w / 2 + 4); y -= w; y -= 20; /* render custom buttons */ line_width = 1; for (int c = 0; c < buttoncnt; c++) { /* TODO: make w = text extents of the label */ w = 100; y -= 30; xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_button_background }); close = (xcb_rectangle_t){ y - w - (2 * line_width), 2, w + (2 * line_width), rect.height - 6 }; xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close); xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border }); buttons[c].x = y - w - (2 * line_width); buttons[c].width = w; xcb_point_t points2[] = { { y - w - (2 * line_width), (line_width / 2) + 2 }, { y - (line_width / 2), (line_width / 2) + 2 }, { y - (line_width / 2), (rect.height - 4 - (line_width / 2)) }, { y - w - (2 * line_width), (rect.height - 4 - (line_width / 2)) }, { y - w - (2 * line_width), (line_width / 2) + 2 } }; xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points2); values[0] = color_text; values[1] = color_button_background; set_font_colors(pixmap_gc, color_text, color_button_background); draw_text(buttons[c].label, pixmap, pixmap_gc, y - w - line_width + 6, 4 + 3, rect.width - y + w + line_width - 6); y -= w; } /* border line at the bottom */ line_width = 2; values[0] = color_border_bottom; values[1] = line_width; xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values); xcb_point_t bottom[] = { { 0, rect.height - 0 }, { rect.width, rect.height - 0 } }; xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 2, bottom); /* Copy the contents of the pixmap to the real window */ xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, rect.width, rect.height); xcb_flush(conn); return 1; } int main(int argc, char *argv[]) { char *pattern = sstrdup("-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1"); int o, option_index = 0; enum { TYPE_ERROR = 0, TYPE_WARNING = 1 } bar_type = TYPE_ERROR; static struct option long_options[] = { {"version", no_argument, 0, 'v'}, {"font", required_argument, 0, 'f'}, {"button", required_argument, 0, 'b'}, {"help", no_argument, 0, 'h'}, {"message", no_argument, 0, 'm'}, {"type", required_argument, 0, 't'}, {0, 0, 0, 0} }; char *options_string = "b:f:m:t:vh"; prompt = i3string_from_utf8("Please do not run this program."); while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) { switch (o) { case 'v': printf("i3-nagbar " I3_VERSION); return 0; case 'f': FREE(pattern); pattern = sstrdup(optarg); break; case 'm': i3string_free(prompt); prompt = i3string_from_utf8(optarg); break; case 't': bar_type = (strcasecmp(optarg, "warning") == 0 ? TYPE_WARNING : TYPE_ERROR); break; case 'h': printf("i3-nagbar " I3_VERSION "\n"); printf("i3-nagbar [-m <message>] [-b <button> <action>] [-t warning|error] [-f <font>] [-v]\n"); return 0; case 'b': buttons = realloc(buttons, sizeof(button_t) * (buttoncnt + 1)); buttons[buttoncnt].label = i3string_from_utf8(optarg); buttons[buttoncnt].action = argv[optind]; printf("button with label *%s* and action *%s*\n", i3string_as_utf8(buttons[buttoncnt].label), buttons[buttoncnt].action); buttoncnt++; printf("now %d buttons\n", buttoncnt); if (optind < argc) optind++; break; } } int screens; if ((conn = xcb_connect(NULL, &screens)) == NULL || xcb_connection_has_error(conn)) die("Cannot open display\n"); /* Place requests for the atoms we need as soon as possible */ #define xmacro(atom) \ xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom); #include "atoms.xmacro" #undef xmacro root_screen = xcb_aux_get_screen(conn, screens); root = root_screen->root; if (bar_type == TYPE_ERROR) { /* Red theme for error messages */ color_button_background = get_colorpixel("#680a0a"); color_background = get_colorpixel("#900000"); color_text = get_colorpixel("#ffffff"); color_border = get_colorpixel("#d92424"); color_border_bottom = get_colorpixel("#470909"); } else { /* Yellowish theme for warnings */ color_button_background = get_colorpixel("#ffc100"); color_background = get_colorpixel("#ffa8000"); color_text = get_colorpixel("#000000"); color_border = get_colorpixel("#ab7100"); color_border_bottom = get_colorpixel("#ab7100"); } font = load_font(pattern, true); set_font(&font); /* Open an input window */ win = xcb_generate_id(conn); xcb_create_window( conn, XCB_COPY_FROM_PARENT, win, /* the window id */ root, /* parent == root */ 50, 50, 500, font.height + 8 + 8 /* 8 px padding */, /* dimensions */ 0, /* x11 border = 0, we draw our own */ XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */ XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, (uint32_t[]){ 0, /* back pixel: black */ XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_STRUCTURE_NOTIFY | XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE }); /* Map the window (make it visible) */ xcb_map_window(conn, win); /* Setup NetWM atoms */ #define xmacro(name) \ do { \ xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \ if (!reply) \ die("Could not get atom " # name "\n"); \ \ A_ ## name = reply->atom; \ free(reply); \ } while (0); #include "atoms.xmacro" #undef xmacro /* Set dock mode */ xcb_change_property(conn, XCB_PROP_MODE_REPLACE, win, A__NET_WM_WINDOW_TYPE, A_ATOM, 32, 1, (unsigned char*) &A__NET_WM_WINDOW_TYPE_DOCK); /* Reserve some space at the top of the screen */ struct { uint32_t left; uint32_t right; uint32_t top; uint32_t bottom; uint32_t left_start_y; uint32_t left_end_y; uint32_t right_start_y; uint32_t right_end_y; uint32_t top_start_x; uint32_t top_end_x; uint32_t bottom_start_x; uint32_t bottom_end_x; } __attribute__((__packed__)) strut_partial = {0,}; strut_partial.top = font.height + 6; strut_partial.top_start_x = 0; strut_partial.top_end_x = 800; xcb_change_property(conn, XCB_PROP_MODE_REPLACE, win, A__NET_WM_STRUT_PARTIAL, A_CARDINAL, 32, 12, &strut_partial); /* Create pixmap */ pixmap = xcb_generate_id(conn); pixmap_gc = xcb_generate_id(conn); xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font.height + 8); xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0); /* Grab the keyboard to get all input */ xcb_flush(conn); xcb_generic_event_t *event; while ((event = xcb_wait_for_event(conn)) != NULL) { if (event->response_type == 0) { fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence); continue; } /* Strip off the highest bit (set if the event is generated) */ int type = (event->response_type & 0x7F); switch (type) { case XCB_EXPOSE: handle_expose(conn, (xcb_expose_event_t*)event); break; case XCB_BUTTON_PRESS: handle_button_press(conn, (xcb_button_press_event_t*)event); break; case XCB_BUTTON_RELEASE: handle_button_release(conn, (xcb_button_release_event_t*)event); break; case XCB_CONFIGURE_NOTIFY: { xcb_configure_notify_event_t *configure_notify = (xcb_configure_notify_event_t*)event; rect = (xcb_rectangle_t){ configure_notify->x, configure_notify->y, configure_notify->width, configure_notify->height }; /* Recreate the pixmap / gc */ xcb_free_pixmap(conn, pixmap); xcb_free_gc(conn, pixmap_gc); xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, rect.width, rect.height); xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0); break; } } free(event); } FREE(pattern); return 0; }