2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
7 * i3-nagbar is a utility which displays a nag message, for example in the case
8 * when the user has an error in his configuration file.
13 #include <sys/types.h>
26 #include <xcb/xcb_aux.h>
27 #include <xcb/xcb_event.h>
30 #include "i3-nagbar.h"
39 static xcb_window_t win;
40 static xcb_pixmap_t pixmap;
41 static xcb_gcontext_t pixmap_gc;
42 static xcb_rectangle_t rect = { 0, 0, 600, 20 };
45 static button_t *buttons;
48 /* Result of get_colorpixel() for the various colors. */
49 static uint32_t color_background; /* background of the bar */
50 static uint32_t color_button_background; /* background for buttons */
51 static uint32_t color_border; /* color of the button border */
52 static uint32_t color_border_bottom; /* color of the bottom border */
53 static uint32_t color_text; /* color of the text */
56 xcb_connection_t *conn;
59 * Starts the given application by passing it through a shell. We use double fork
60 * to avoid zombie processes. As the started application’s parent exits (immediately),
61 * the application is reparented to init (process-id 1), which correctly handles
62 * childs, so we don’t have to do it :-).
64 * The shell is determined by looking for the SHELL environment variable. If it
65 * does not exist, /bin/sh is used.
68 static void start_application(const char *command) {
69 printf("executing: %s\n", command);
74 /* Stores the path of the shell */
75 static const char *shell = NULL;
78 if ((shell = getenv("SHELL")) == NULL)
81 /* This is the child */
82 execl(shell, shell, "-c", command, (void*)NULL);
90 static button_t *get_button_at(int16_t x, int16_t y) {
91 for (int c = 0; c < buttoncnt; c++)
92 if (x >= (buttons[c].x) && x <= (buttons[c].x + buttons[c].width))
98 static void handle_button_press(xcb_connection_t *conn, xcb_button_press_event_t *event) {
99 printf("button pressed on x = %d, y = %d\n",
100 event->event_x, event->event_y);
101 /* TODO: set a flag for the button, re-render */
105 * Called when the user releases the mouse button. Checks whether the
106 * coordinates are over a button and executes the appropriate action.
109 static void handle_button_release(xcb_connection_t *conn, xcb_button_release_event_t *event) {
110 printf("button released on x = %d, y = %d\n",
111 event->event_x, event->event_y);
112 /* If the user hits the close button, we exit(0) */
113 if (event->event_x >= (rect.width - 32))
115 button_t *button = get_button_at(event->event_x, event->event_y);
118 start_application(button->action);
120 /* TODO: unset flag, re-render */
124 * Handles expose events (redraws of the window) and rendering in general. Will
125 * be called from the code with event == NULL or from X with event != NULL.
128 static int handle_expose(xcb_connection_t *conn, xcb_expose_event_t *event) {
129 /* re-draw the background */
130 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_background });
131 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &rect);
133 /* restore font color */
134 set_font_colors(pixmap_gc, color_text, color_background);
135 draw_text(prompt, strlen(prompt), false, pixmap, pixmap_gc,
136 4 + 4, 4 + 4, rect.width - 4 - 4);
138 /* render close button */
143 values[0] = color_button_background;
144 values[1] = line_width;
145 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
147 xcb_rectangle_t close = { y - w - (2 * line_width), 0, w + (2 * line_width), rect.height };
148 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
150 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border });
151 xcb_point_t points[] = {
152 { y - w - (2 * line_width), line_width / 2 },
153 { y - (line_width / 2), line_width / 2 },
154 { y - (line_width / 2), (rect.height - (line_width / 2)) - 2 },
155 { y - w - (2 * line_width), (rect.height - (line_width / 2)) - 2 },
156 { y - w - (2 * line_width), line_width / 2 }
158 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points);
161 set_font_colors(pixmap_gc, color_text, color_button_background);
162 draw_text("X", 1, false, pixmap, pixmap_gc, y - w - line_width + w / 2 - 4,
163 4 + 4 - 1, rect.width - y + w + line_width - w / 2 + 4);
168 /* render custom buttons */
170 for (int c = 0; c < buttoncnt; c++) {
171 /* TODO: make w = text extents of the label */
174 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_button_background });
175 close = (xcb_rectangle_t){ y - w - (2 * line_width), 2, w + (2 * line_width), rect.height - 6 };
176 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
178 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border });
179 buttons[c].x = y - w - (2 * line_width);
180 buttons[c].width = w;
181 xcb_point_t points2[] = {
182 { y - w - (2 * line_width), (line_width / 2) + 2 },
183 { y - (line_width / 2), (line_width / 2) + 2 },
184 { y - (line_width / 2), (rect.height - 4 - (line_width / 2)) },
185 { y - w - (2 * line_width), (rect.height - 4 - (line_width / 2)) },
186 { y - w - (2 * line_width), (line_width / 2) + 2 }
188 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points2);
190 values[0] = color_text;
191 values[1] = color_button_background;
192 set_font_colors(pixmap_gc, color_text, color_button_background);
193 draw_text(buttons[c].label, strlen(buttons[c].label), false, pixmap, pixmap_gc,
194 y - w - line_width + 6, 4 + 3, rect.width - y + w + line_width - 6);
199 /* border line at the bottom */
201 values[0] = color_border_bottom;
202 values[1] = line_width;
203 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
204 xcb_point_t bottom[] = {
205 { 0, rect.height - 0 },
206 { rect.width, rect.height - 0 }
208 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 2, bottom);
211 /* Copy the contents of the pixmap to the real window */
212 xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, rect.width, rect.height);
218 int main(int argc, char *argv[]) {
219 char *pattern = strdup("-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1");
220 int o, option_index = 0;
221 enum { TYPE_ERROR = 0, TYPE_WARNING = 1 } bar_type = TYPE_ERROR;
223 static struct option long_options[] = {
224 {"version", no_argument, 0, 'v'},
225 {"font", required_argument, 0, 'f'},
226 {"button", required_argument, 0, 'b'},
227 {"help", no_argument, 0, 'h'},
228 {"message", no_argument, 0, 'm'},
229 {"type", required_argument, 0, 't'},
233 char *options_string = "b:f:m:t:vh";
235 prompt = strdup("Please do not run this program.");
237 while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
240 printf("i3-nagbar " I3_VERSION);
244 pattern = strdup(optarg);
248 prompt = strdup(optarg);
251 bar_type = (strcasecmp(optarg, "warning") == 0 ? TYPE_WARNING : TYPE_ERROR);
254 printf("i3-nagbar " I3_VERSION "\n");
255 printf("i3-nagbar [-m <message>] [-b <button> <action>] [-f <font>] [-v]\n");
258 buttons = realloc(buttons, sizeof(button_t) * (buttoncnt + 1));
259 buttons[buttoncnt].label = optarg;
260 buttons[buttoncnt].action = argv[optind];
261 printf("button with label *%s* and action *%s*\n",
262 buttons[buttoncnt].label,
263 buttons[buttoncnt].action);
265 printf("now %d buttons\n", buttoncnt);
273 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
274 xcb_connection_has_error(conn))
275 die("Cannot open display\n");
277 /* Place requests for the atoms we need as soon as possible */
278 #define xmacro(atom) \
279 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
280 #include "atoms.xmacro"
283 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
284 root = root_screen->root;
286 if (bar_type == TYPE_ERROR) {
287 /* Red theme for error messages */
288 color_button_background = get_colorpixel("#680a0a");
289 color_background = get_colorpixel("#900000");
290 color_text = get_colorpixel("#ffffff");
291 color_border = get_colorpixel("#d92424");
292 color_border_bottom = get_colorpixel("#470909");
294 /* Yellowish theme for warnings */
295 color_button_background = get_colorpixel("#ffc100");
296 color_background = get_colorpixel("#ffa8000");
297 color_text = get_colorpixel("#000000");
298 color_border = get_colorpixel("#ab7100");
299 color_border_bottom = get_colorpixel("#ab7100");
302 font = load_font(pattern, true);
305 /* Open an input window */
306 win = xcb_generate_id(conn);
310 XCB_COPY_FROM_PARENT,
311 win, /* the window id */
312 root, /* parent == root */
313 50, 50, 500, font.height + 8 + 8 /* 8 px padding */, /* dimensions */
314 0, /* x11 border = 0, we draw our own */
315 XCB_WINDOW_CLASS_INPUT_OUTPUT,
316 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
317 XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK,
319 0, /* back pixel: black */
320 XCB_EVENT_MASK_EXPOSURE |
321 XCB_EVENT_MASK_STRUCTURE_NOTIFY |
322 XCB_EVENT_MASK_BUTTON_PRESS |
323 XCB_EVENT_MASK_BUTTON_RELEASE
326 /* Map the window (make it visible) */
327 xcb_map_window(conn, win);
329 /* Setup NetWM atoms */
330 #define xmacro(name) \
332 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
334 die("Could not get atom " # name "\n"); \
336 A_ ## name = reply->atom; \
339 #include "atoms.xmacro"
343 xcb_change_property(conn,
344 XCB_PROP_MODE_REPLACE,
346 A__NET_WM_WINDOW_TYPE,
350 (unsigned char*) &A__NET_WM_WINDOW_TYPE_DOCK);
352 /* Reserve some space at the top of the screen */
358 uint32_t left_start_y;
360 uint32_t right_start_y;
361 uint32_t right_end_y;
362 uint32_t top_start_x;
364 uint32_t bottom_start_x;
365 uint32_t bottom_end_x;
366 } __attribute__((__packed__)) strut_partial = {0,};
368 strut_partial.top = font.height + 6;
369 strut_partial.top_start_x = 0;
370 strut_partial.top_end_x = 800;
372 xcb_change_property(conn,
373 XCB_PROP_MODE_REPLACE,
375 A__NET_WM_STRUT_PARTIAL,
382 pixmap = xcb_generate_id(conn);
383 pixmap_gc = xcb_generate_id(conn);
384 xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font.height + 8);
385 xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
387 /* Grab the keyboard to get all input */
390 xcb_generic_event_t *event;
391 while ((event = xcb_wait_for_event(conn)) != NULL) {
392 if (event->response_type == 0) {
393 fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
397 /* Strip off the highest bit (set if the event is generated) */
398 int type = (event->response_type & 0x7F);
402 handle_expose(conn, (xcb_expose_event_t*)event);
405 case XCB_BUTTON_PRESS:
406 handle_button_press(conn, (xcb_button_press_event_t*)event);
409 case XCB_BUTTON_RELEASE:
410 handle_button_release(conn, (xcb_button_release_event_t*)event);
413 case XCB_CONFIGURE_NOTIFY: {
414 xcb_configure_notify_event_t *configure_notify = (xcb_configure_notify_event_t*)event;
415 rect = (xcb_rectangle_t){
418 configure_notify->width,
419 configure_notify->height
422 /* Recreate the pixmap / gc */
423 xcb_free_pixmap(conn, pixmap);
424 xcb_free_gc(conn, pixmap_gc);
426 xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, rect.width, rect.height);
427 xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);