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 */
135 values[0] = color_text;
136 values[1] = color_background;
137 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, values);
138 xcb_image_text_8(conn, strlen(prompt), pixmap, pixmap_gc, 4 + 4/* X */,
139 font.height + 2 + 4 /* Y = baseline of font */, prompt);
141 /* render close button */
145 values[0] = color_button_background;
146 values[1] = line_width;
147 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
149 xcb_rectangle_t close = { y - w - (2 * line_width), 0, w + (2 * line_width), rect.height };
150 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
152 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border });
153 xcb_point_t points[] = {
154 { y - w - (2 * line_width), line_width / 2 },
155 { y - (line_width / 2), line_width / 2 },
156 { y - (line_width / 2), (rect.height - (line_width / 2)) - 2 },
157 { y - w - (2 * line_width), (rect.height - (line_width / 2)) - 2 },
158 { y - w - (2 * line_width), line_width / 2 }
160 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points);
162 values[0] = color_text;
163 values[1] = color_button_background;
165 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_LINE_WIDTH, values);
166 xcb_image_text_8(conn, strlen("x"), pixmap, pixmap_gc, y - w - line_width + (w / 2) - 4/* X */,
167 font.height + 2 + 4 - 1/* Y = baseline of font */, "X");
172 /* render custom buttons */
174 for (int c = 0; c < buttoncnt; c++) {
175 /* TODO: make w = text extents of the label */
178 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_button_background });
179 close = (xcb_rectangle_t){ y - w - (2 * line_width), 2, w + (2 * line_width), rect.height - 6 };
180 xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
182 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){ color_border });
183 buttons[c].x = y - w - (2 * line_width);
184 buttons[c].width = w;
185 xcb_point_t points2[] = {
186 { y - w - (2 * line_width), (line_width / 2) + 2 },
187 { y - (line_width / 2), (line_width / 2) + 2 },
188 { y - (line_width / 2), (rect.height - 4 - (line_width / 2)) },
189 { y - w - (2 * line_width), (rect.height - 4 - (line_width / 2)) },
190 { y - w - (2 * line_width), (line_width / 2) + 2 }
192 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 5, points2);
194 values[0] = color_text;
195 values[1] = color_button_background;
196 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, values);
197 xcb_image_text_8(conn, strlen(buttons[c].label), pixmap, pixmap_gc, y - w - line_width + 6/* X */,
198 font.height + 2 + 3/* Y = baseline of font */, buttons[c].label);
203 /* border line at the bottom */
205 values[0] = color_border_bottom;
206 values[1] = line_width;
207 xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
208 xcb_point_t bottom[] = {
209 { 0, rect.height - 0 },
210 { rect.width, rect.height - 0 }
212 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, pixmap, pixmap_gc, 2, bottom);
215 /* Copy the contents of the pixmap to the real window */
216 xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, rect.width, rect.height);
222 int main(int argc, char *argv[]) {
223 char *pattern = strdup("-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1");
224 int o, option_index = 0;
225 enum { TYPE_ERROR = 0, TYPE_WARNING = 1 } bar_type = TYPE_ERROR;
227 static struct option long_options[] = {
228 {"version", no_argument, 0, 'v'},
229 {"font", required_argument, 0, 'f'},
230 {"button", required_argument, 0, 'b'},
231 {"help", no_argument, 0, 'h'},
232 {"message", no_argument, 0, 'm'},
233 {"type", required_argument, 0, 't'},
237 char *options_string = "b:f:m:t:vh";
239 prompt = strdup("Please do not run this program.");
241 while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
244 printf("i3-nagbar " I3_VERSION);
248 pattern = strdup(optarg);
252 prompt = strdup(optarg);
255 bar_type = (strcasecmp(optarg, "warning") == 0 ? TYPE_WARNING : TYPE_ERROR);
258 printf("i3-nagbar " I3_VERSION "\n");
259 printf("i3-nagbar [-m <message>] [-b <button> <action>] [-f <font>] [-v]\n");
262 buttons = realloc(buttons, sizeof(button_t) * (buttoncnt + 1));
263 buttons[buttoncnt].label = optarg;
264 buttons[buttoncnt].action = argv[optind];
265 printf("button with label *%s* and action *%s*\n",
266 buttons[buttoncnt].label,
267 buttons[buttoncnt].action);
269 printf("now %d buttons\n", buttoncnt);
277 if ((conn = xcb_connect(NULL, &screens)) == NULL ||
278 xcb_connection_has_error(conn))
279 die("Cannot open display\n");
281 /* Place requests for the atoms we need as soon as possible */
282 #define xmacro(atom) \
283 xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
284 #include "atoms.xmacro"
287 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
288 root = root_screen->root;
290 if (bar_type == TYPE_ERROR) {
291 /* Red theme for error messages */
292 color_button_background = get_colorpixel("#680a0a");
293 color_background = get_colorpixel("#900000");
294 color_text = get_colorpixel("#ffffff");
295 color_border = get_colorpixel("#d92424");
296 color_border_bottom = get_colorpixel("#470909");
298 /* Yellowish theme for warnings */
299 color_button_background = get_colorpixel("#ffc100");
300 color_background = get_colorpixel("#ffa8000");
301 color_text = get_colorpixel("#000000");
302 color_border = get_colorpixel("#ab7100");
303 color_border_bottom = get_colorpixel("#ab7100");
306 font = load_font(pattern, true);
308 /* Open an input window */
309 win = xcb_generate_id(conn);
313 XCB_COPY_FROM_PARENT,
314 win, /* the window id */
315 root, /* parent == root */
316 50, 50, 500, font.height + 8 + 8 /* 8 px padding */, /* dimensions */
317 0, /* x11 border = 0, we draw our own */
318 XCB_WINDOW_CLASS_INPUT_OUTPUT,
319 XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
320 XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK,
322 0, /* back pixel: black */
323 XCB_EVENT_MASK_EXPOSURE |
324 XCB_EVENT_MASK_STRUCTURE_NOTIFY |
325 XCB_EVENT_MASK_BUTTON_PRESS |
326 XCB_EVENT_MASK_BUTTON_RELEASE
329 /* Map the window (make it visible) */
330 xcb_map_window(conn, win);
332 /* Setup NetWM atoms */
333 #define xmacro(name) \
335 xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name ## _cookie, NULL); \
337 die("Could not get atom " # name "\n"); \
339 A_ ## name = reply->atom; \
342 #include "atoms.xmacro"
346 xcb_change_property(conn,
347 XCB_PROP_MODE_REPLACE,
349 A__NET_WM_WINDOW_TYPE,
353 (unsigned char*) &A__NET_WM_WINDOW_TYPE_DOCK);
355 /* Reserve some space at the top of the screen */
361 uint32_t left_start_y;
363 uint32_t right_start_y;
364 uint32_t right_end_y;
365 uint32_t top_start_x;
367 uint32_t bottom_start_x;
368 uint32_t bottom_end_x;
369 } __attribute__((__packed__)) strut_partial = {0,};
371 strut_partial.top = font.height + 6;
372 strut_partial.top_start_x = 0;
373 strut_partial.top_end_x = 800;
375 xcb_change_property(conn,
376 XCB_PROP_MODE_REPLACE,
378 A__NET_WM_STRUT_PARTIAL,
385 pixmap = xcb_generate_id(conn);
386 pixmap_gc = xcb_generate_id(conn);
387 xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font.height + 8);
388 xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
390 /* Create graphics context */
391 xcb_change_gc(conn, pixmap_gc, XCB_GC_FONT, (uint32_t[]){ font.id });
393 /* Grab the keyboard to get all input */
396 xcb_generic_event_t *event;
397 while ((event = xcb_wait_for_event(conn)) != NULL) {
398 if (event->response_type == 0) {
399 fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
403 /* Strip off the highest bit (set if the event is generated) */
404 int type = (event->response_type & 0x7F);
408 handle_expose(conn, (xcb_expose_event_t*)event);
411 case XCB_BUTTON_PRESS:
412 handle_button_press(conn, (xcb_button_press_event_t*)event);
415 case XCB_BUTTON_RELEASE:
416 handle_button_release(conn, (xcb_button_release_event_t*)event);
419 case XCB_CONFIGURE_NOTIFY: {
420 xcb_configure_notify_event_t *configure_notify = (xcb_configure_notify_event_t*)event;
421 rect = (xcb_rectangle_t){
424 configure_notify->width,
425 configure_notify->height
428 /* Recreate the pixmap / gc */
429 xcb_free_pixmap(conn, pixmap);
430 xcb_free_gc(conn, pixmap_gc);
432 xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, rect.width, rect.height);
433 xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
435 /* Create graphics context */
436 xcb_change_gc(conn, pixmap_gc, XCB_GC_FONT, (uint32_t[]){ font.id });