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lemonbar/bar.c

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#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <signal.h>
#include <poll.h>
#include <getopt.h>
#include <unistd.h>
#include <errno.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
#include <xcb/randr.h>
// Here be dragons
#define max(a,b) ((a) > (b) ? (a) : (b))
#define min(a,b) ((a) < (b) ? (a) : (b))
#define indexof(c,s) (strchr((s),(c))-(s))
typedef struct font_t {
xcb_font_t ptr;
int descent, height;
uint16_t char_max;
uint16_t char_min;
xcb_charinfo_t *width_lut;
} font_t;
typedef struct monitor_t {
int x, width;
xcb_window_t window;
xcb_pixmap_t pixmap;
struct monitor_t *prev, *next;
} monitor_t;
typedef struct area_t {
int begin, end, align, button;
xcb_window_t window;
char *cmd;
} area_t;
#define N 20
typedef struct area_stack_t {
int pos;
area_t slot[N];
} area_stack_t;
enum {
ATTR_OVERL = (1<<0),
ATTR_UNDERL = (1<<1),
};
enum {
ALIGN_L = 0,
ALIGN_C,
ALIGN_R
};
enum {
GC_DRAW = 0,
GC_CLEAR,
GC_ATTR,
GC_MAX
};
static xcb_connection_t *c;
static xcb_screen_t *scr;
static xcb_gcontext_t gc[GC_MAX];
static xcb_visualid_t visual;
static xcb_colormap_t colormap;
static monitor_t *monhead, *montail;
static font_t *main_font, *alt_font;
static uint32_t attrs = 0;
static bool dock = false;
static bool topbar = true;
static int bw = -1, bh = -1, bx = 0, by = 0;
static int bu = 1; /* Underline height */
static char *mfont, *afont;
static uint32_t fgc, bgc, ugc;
static uint32_t dfgc, dbgc;
static area_stack_t astack;
void
update_gc (void)
{
xcb_change_gc(c, gc[GC_DRAW], XCB_GC_BACKGROUND | XCB_GC_FOREGROUND, (const uint32_t []){ fgc, bgc });
xcb_change_gc(c, gc[GC_CLEAR], XCB_GC_FOREGROUND, (const uint32_t []){ bgc });
xcb_change_gc(c, gc[GC_ATTR], XCB_GC_FOREGROUND, (const uint32_t []){ ugc });
}
void
fill_rect (xcb_drawable_t d, xcb_gcontext_t gc, int x, int y, int width, int height)
{
xcb_poly_fill_rectangle(c, d, gc, 1, (const xcb_rectangle_t []){ { x, y, width, height } });
}
int
draw_char (monitor_t *mon, font_t *cur_font, int x, int align, uint16_t ch)
{
/* In the unlikely case that the font doesn't have the glyph wanted just do nothing */
if (ch < cur_font->char_min || ch > cur_font->char_max)
return 0;
int ch_width = cur_font->width_lut[ch - cur_font->char_min].character_width;
switch (align) {
case ALIGN_C:
xcb_copy_area(c, mon->pixmap, mon->pixmap, gc[GC_DRAW], mon->width / 2 - x / 2, 0,
mon->width / 2 - (x + ch_width) / 2, 0, x, bh);
x = mon->width / 2 - (x + ch_width) / 2 + x;
break;
case ALIGN_R:
xcb_copy_area(c, mon->pixmap, mon->pixmap, gc[GC_DRAW], mon->width - x, 0,
mon->width - x - ch_width, 0, x, bh);
x = mon->width - ch_width;
break;
}
/* Draw the background first */
fill_rect(mon->pixmap, gc[GC_CLEAR], x, by, ch_width, bh);
/* xcb accepts string in UCS-2 BE, so swap */
ch = (ch >> 8) | (ch << 8);
/* String baseline coordinates */
xcb_image_text_16(c, 1, mon->pixmap, gc[GC_DRAW], x, bh / 2 + cur_font->height / 2 - cur_font->descent, (xcb_char2b_t *)&ch);
/* We can render both at the same time */
if (attrs & ATTR_OVERL)
fill_rect(mon->pixmap, gc[GC_ATTR], x, 0, ch_width, bu);
if (attrs & ATTR_UNDERL)
fill_rect(mon->pixmap, gc[GC_ATTR], x, bh - bu, ch_width, bu);
return ch_width;
}
uint32_t
parse_color (const char *str, char **end, const uint32_t def)
{
xcb_alloc_named_color_reply_t *nc_reply;
int str_len;
uint32_t ret;
if (!str)
return def;
/* Reset */
if (str[0] == '-') {
if (end)
*end = (char *)str + 1;
return def;
}
/* Hex representation */
if (str[0] == '#') {
errno = 0;
uint32_t tmp = strtoul(str + 1, end, 16);
/* Some error checking is definitely good */
if (errno)
tmp = def;
/* Xorg uses colors with premultiplied alpha.
* Don't do anything if we didn't acquire a rgba visual. */
if (visual != scr->root_visual) {
const uint8_t a = ((tmp>>24)&255);
const uint32_t t1 = (tmp&0xff00ff) * (0x100-a);
const uint32_t t2 = (tmp&0x00ff00) * (0x100-a);
tmp = (a<<24)|(t1&0xff00ff)|(t2&0x00ff00);
}
return tmp;
}
/* Actual color name, resolve it */
str_len = 0;
while (isalpha(str[str_len]))
str_len++;
nc_reply = xcb_alloc_named_color_reply(c, xcb_alloc_named_color(c, colormap, str_len, str), NULL);
if (!nc_reply)
fprintf(stderr, "Could not alloc color \"%.*s\"\n", str_len, str);
ret = (nc_reply) ? nc_reply->pixel : def;
free(nc_reply);
if (end)
*end = (char *)str + str_len;
return ret;
}
void
set_attribute (const char modifier, const char attribute)
{
int pos = indexof(attribute, "ou");
if (pos < 0) {
fprintf(stderr, "Invalid attribute \"%c\" found\n", attribute);
return;
}
switch (modifier) {
case '+': attrs |= (1<<pos); break;
case '-': attrs &=~(1<<pos); break;
case '!': attrs ^= (1<<pos); break;
}
}
area_t *
area_get (xcb_window_t win, const int x)
{
for (int i = 0; i < astack.pos; i++)
if (astack.slot[i].window == win && x > astack.slot[i].begin && x < astack.slot[i].end)
return &astack.slot[i];
return NULL;
}
void
area_shift (xcb_window_t win, const int align, int delta)
{
if (align == ALIGN_L)
return;
if (align == ALIGN_C)
delta /= 2;
for (int i = 0; i < astack.pos; i++) {
if (astack.slot[i].window == win && astack.slot[i].align == align) {
astack.slot[i].begin -= delta;
astack.slot[i].end -= delta;
}
}
}
bool
area_add (char *str, const char *optend, char **end, monitor_t *mon, const int x, const int align, const int button)
{
char *p = str;
area_t *a = &astack.slot[astack.pos];
if (astack.pos == N) {
fprintf(stderr, "astack overflow!\n");
return false;
}
/* A wild close area tag appeared! */
if (*p != ':') {
*end = p;
/* Basic safety checks */
if (!a->cmd || a->align != align || a->window != mon->window)
return false;
const int size = x - a->begin;
switch (align) {
case ALIGN_L:
a->end = x;
break;
case ALIGN_C:
a->begin = mon->width / 2 - size / 2 + a->begin / 2;
a->end = a->begin + size;
break;
case ALIGN_R:
/* The newest is the rightmost one */
a->begin = mon->width - size;
a->end = mon->width;
break;
}
astack.pos++;
return true;
}
char *trail = strchr(++p, ':');
/* Find the trailing : and make sure it's whitin the formatting block, also reject empty commands */
if (!trail || p == trail || trail > optend) {
*end = p;
return false;
}
*trail = '\0';
/* This is a pointer to the string buffer allocated in the main */
a->cmd = p;
a->align = align;
a->begin = x;
a->window = mon->window;
a->button = button;
*end = trail + 1;
return true;
}
void
parse (char *text)
{
font_t *cur_font;
monitor_t *cur_mon;
int pos_x, align, button;
char *p = text, *end;
uint32_t tmp;
pos_x = 0;
align = ALIGN_L;
cur_mon = monhead;
memset(&astack, 0, sizeof(area_stack_t));
for (monitor_t *m = monhead; m != NULL; m = m->next)
fill_rect(m->pixmap, gc[GC_CLEAR], 0, 0, m->width, bh);
for (;;) {
if (*p == '\0' || *p == '\n')
return;
if (*p == '%' && p++ && *p == '{' && (end = strchr(p++, '}'))) {
while (p < end) {
while (isspace(*p))
p++;
switch (*p++) {
case '+': set_attribute('+', *p++); break;
case '-': set_attribute('-', *p++); break;
case '!': set_attribute('!', *p++); break;
case 'R':
tmp = fgc;
fgc = bgc;
bgc = tmp;
update_gc();
break;
case 'l': pos_x = 0; align = ALIGN_L; break;
case 'c': pos_x = 0; align = ALIGN_C; break;
case 'r': pos_x = 0; align = ALIGN_R; break;
case 'A':
button = XCB_BUTTON_INDEX_1;
/* The range is 1-5 */
if (isdigit(*p) && (*p > '0' && *p < '6'))
button = *p++ - '0';
area_add(p, end, &p, cur_mon, pos_x, align, button);
break;
case 'B': bgc = parse_color(p, &p, dbgc); update_gc(); break;
case 'F': fgc = parse_color(p, &p, dfgc); update_gc(); break;
case 'U': ugc = parse_color(p, &p, dbgc); update_gc(); break;
case 'S':
if (*p == '+' && cur_mon->next)
{ cur_mon = cur_mon->next; }
else if (*p == '-' && cur_mon->prev)
{ cur_mon = cur_mon->prev; }
else if (*p == 'f')
{ cur_mon = monhead; }
else if (*p == 'l')
{ cur_mon = montail ? montail : monhead; }
else if (isdigit(*p))
{ cur_mon = monhead;
for (int i = 0; i != *p-'0' && cur_mon->next; i++)
cur_mon = cur_mon->next;
}
else
{ p++; continue; }
p++;
pos_x = 0;
break;
/* In case of error keep parsing after the closing } */
default:
p = end;
}
}
/* Eat the trailing } */
p++;
} else { /* utf-8 -> ucs-2 */
uint8_t *utf = (uint8_t *)p;
uint16_t ucs;
if (utf[0] < 0x80) {
ucs = utf[0];
p += 1;
}
else if ((utf[0] & 0xe0) == 0xc0) {
ucs = (utf[0] & 0x1f) << 6 | (utf[1] & 0x3f);
p += 2;
}
else if ((utf[0] & 0xf0) == 0xe0) {
ucs = (utf[0] & 0xf) << 12 | (utf[1] & 0x3f) << 6 | (utf[2] & 0x3f);
p += 3;
}
else { /* Handle ascii > 0x80 */
ucs = utf[0];
p += 1;
}
/* If the character is outside the main font charset use the alternate font */
cur_font = (ucs < main_font->char_min || ucs > main_font->char_max) ? alt_font : main_font;
xcb_change_gc(c, gc[GC_DRAW] , XCB_GC_FONT, (const uint32_t []){ cur_font->ptr });
int w = draw_char(cur_mon, cur_font, pos_x, align, ucs);
pos_x += w;
area_shift(cur_mon->window, align, w);
}
}
}
font_t *
font_load (const char *str)
{
xcb_query_font_cookie_t queryreq;
xcb_query_font_reply_t *font_info;
xcb_void_cookie_t cookie;
xcb_font_t font;
font = xcb_generate_id(c);
cookie = xcb_open_font_checked(c, font, strlen(str), str);
if (xcb_request_check (c, cookie)) {
fprintf(stderr, "Could not load font %s\n", str);
return NULL;
}
font_t *ret = calloc(1, sizeof(font_t));
if (!ret)
return NULL;
queryreq = xcb_query_font(c, font);
font_info = xcb_query_font_reply(c, queryreq, NULL);
ret->ptr = font;
ret->descent = font_info->font_descent;
ret->height = font_info->font_ascent + font_info->font_descent;
ret->char_max = font_info->max_byte1 << 8 | font_info->max_char_or_byte2;
ret->char_min = font_info->min_byte1 << 8 | font_info->min_char_or_byte2;
ret->width_lut = xcb_query_font_char_infos(font_info);
return ret;
}
enum {
NET_WM_WINDOW_TYPE,
NET_WM_WINDOW_TYPE_DOCK,
NET_WM_DESKTOP,
NET_WM_STRUT_PARTIAL,
NET_WM_STRUT,
NET_WM_STATE,
NET_WM_STATE_STICKY,
NET_WM_STATE_ABOVE,
};
void
set_ewmh_atoms (void)
{
const char *atom_names[] = {
"_NET_WM_WINDOW_TYPE",
"_NET_WM_WINDOW_TYPE_DOCK",
"_NET_WM_DESKTOP",
"_NET_WM_STRUT_PARTIAL",
"_NET_WM_STRUT",
"_NET_WM_STATE",
/* Leave those at the end since are batch-set */
"_NET_WM_STATE_STICKY",
"_NET_WM_STATE_ABOVE",
};
const int atoms = sizeof(atom_names)/sizeof(char *);
xcb_intern_atom_cookie_t atom_cookie[atoms];
xcb_atom_t atom_list[atoms];
xcb_intern_atom_reply_t *atom_reply;
/* As suggested fetch all the cookies first (yum!) and then retrieve the
* atoms to exploit the async'ness */
for (int i = 0; i < atoms; i++)
atom_cookie[i] = xcb_intern_atom(c, 0, strlen(atom_names[i]), atom_names[i]);
for (int i = 0; i < atoms; i++) {
atom_reply = xcb_intern_atom_reply(c, atom_cookie[i], NULL);
if (!atom_reply)
return;
atom_list[i] = atom_reply->atom;
free(atom_reply);
}
/* Prepare the strut array */
for (monitor_t *mon = monhead; mon; mon = mon->next) {
int strut[12] = {0};
if (topbar) {
strut[2] = bh;
strut[8] = mon->x;
strut[9] = mon->x + mon->width;
} else {
strut[3] = bh;
strut[10] = mon->x;
strut[11] = mon->x + mon->width;
}
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_WINDOW_TYPE], XCB_ATOM_ATOM, 32, 1, &atom_list[NET_WM_WINDOW_TYPE_DOCK]);
xcb_change_property(c, XCB_PROP_MODE_APPEND, mon->window, atom_list[NET_WM_STATE], XCB_ATOM_ATOM, 32, 2, &atom_list[NET_WM_STATE_STICKY]);
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_DESKTOP], XCB_ATOM_CARDINAL, 32, 1, (const uint32_t []){ -1 } );
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_STRUT_PARTIAL], XCB_ATOM_CARDINAL, 32, 12, strut);
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, atom_list[NET_WM_STRUT], XCB_ATOM_CARDINAL, 32, 4, strut);
}
}
monitor_t *
monitor_new (int x, int y, int width, int height)
{
monitor_t *ret;
ret = calloc(1, sizeof(monitor_t));
if (!ret) {
fprintf(stderr, "Failed to allocate new monitor\n");
exit(EXIT_FAILURE);
}
ret->x = x;
ret->width = width;
ret->next = ret->prev = NULL;
int win_y = (topbar ? by : height - bh - by) + y;
ret->window = xcb_generate_id(c);
int depth = (visual == scr->root_visual) ? XCB_COPY_FROM_PARENT : 32;
xcb_create_window(c, depth, ret->window, scr->root,
x, win_y, width, bh, 0,
XCB_WINDOW_CLASS_INPUT_OUTPUT, visual,
XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP,
(const uint32_t []){ bgc, bgc, dock, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS, colormap });
ret->pixmap = xcb_generate_id(c);
xcb_create_pixmap(c, depth, ret->pixmap, ret->window, width, bh);
return ret;
}
void
monitor_add (monitor_t *mon)
{
if (!monhead) {
monhead = mon;
} else if (!montail) {
montail = mon;
monhead->next = mon;
mon->prev = monhead;
} else {
mon->prev = montail;
montail->next = mon;
montail = montail->next;
}
}
int
rect_sort_cb (const void *p1, const void *p2)
{
const xcb_rectangle_t *r1 = (xcb_rectangle_t *)p1;
const xcb_rectangle_t *r2 = (xcb_rectangle_t *)p2;
if (r1->x < r2->x || r1->y < r2->y)
return -1;
if (r1->x > r2->x || r1->y > r2->y)
return 1;
return 0;
}
void
monitor_create_chain (xcb_rectangle_t *rects, const int num)
{
int i;
int width = 0, height = 0;
int left = bx;
/* Sort before use */
qsort(rects, num, sizeof(xcb_rectangle_t), rect_sort_cb);
for (i = 0; i < num; i++) {
int h = rects[i].y + rects[i].height;
/* Accumulated width of all monitors */
width += rects[i].width;
/* Get height of screen from y_offset + height of lowest monitor */
if (h >= height)
height = h;
}
if (bw < 0)
bw = width - bx;
if (bh < 0 || bh > height)
bh = main_font->height + bu + 2;
/* Check the geometry */
if (bx + bw > width || by + bh > height) {
fprintf(stderr, "The geometry specified doesn't fit the screen!\n");
exit(EXIT_FAILURE);
}
/* Left is a positive number or zero therefore monitors with zero width are excluded */
width = bw;
for (i = 0; i < num; i++) {
if (rects[i].y + rects[i].height < by)
continue;
if (rects[i].width > left) {
monitor_t *mon = monitor_new(
rects[i].x + left,
rects[i].y,
min(width, rects[i].width - left),
rects[i].height);
monitor_add(mon);
width -= rects[i].width - left;
/* No need to check for other monitors */
if (width <= 0)
break;
}
left -= rects[i].width;
if (left < 0)
left = 0;
}
}
void
get_randr_monitors (void)
{
xcb_randr_get_screen_resources_current_reply_t *rres_reply;
xcb_randr_output_t *outputs;
int i, j, num, valid = 0;
rres_reply = xcb_randr_get_screen_resources_current_reply(c,
xcb_randr_get_screen_resources_current(c, scr->root), NULL);
if (!rres_reply) {
fprintf(stderr, "Failed to get current randr screen resources\n");
return;
}
num = xcb_randr_get_screen_resources_current_outputs_length(rres_reply);
outputs = xcb_randr_get_screen_resources_current_outputs(rres_reply);
/* There should be at least one output */
if (num < 1) {
free(rres_reply);
return;
}
xcb_rectangle_t rects[num];
/* Get all outputs */
for (i = 0; i < num; i++) {
xcb_randr_get_output_info_reply_t *oi_reply;
xcb_randr_get_crtc_info_reply_t *ci_reply;
oi_reply = xcb_randr_get_output_info_reply(c, xcb_randr_get_output_info(c, outputs[i], XCB_CURRENT_TIME), NULL);
/* Output disconnected or not attached to any CRTC ? */
if (!oi_reply || oi_reply->crtc == XCB_NONE || oi_reply->connection != XCB_RANDR_CONNECTION_CONNECTED) {
rects[i].width = 0;
continue;
}
ci_reply = xcb_randr_get_crtc_info_reply(c,
xcb_randr_get_crtc_info(c, oi_reply->crtc, XCB_CURRENT_TIME), NULL);
free(oi_reply);
if (!ci_reply) {
fprintf(stderr, "Failed to get RandR ctrc info\n");
free(rres_reply);
return;
}
if (ci_reply->rotation & (XCB_RANDR_ROTATION_ROTATE_90|XCB_RANDR_ROTATION_ROTATE_270))
rects[i] = (xcb_rectangle_t){ ci_reply->x, ci_reply->y, ci_reply->height, ci_reply->width };
else
rects[i] = (xcb_rectangle_t){ ci_reply->x, ci_reply->y, ci_reply->width, ci_reply->height };
free(ci_reply);
valid++;
}
free(rres_reply);
/* Check for clones and inactive outputs */
for (i = 0; i < num; i++) {
if (rects[i].width == 0)
continue;
for (j = 0; j < num; j++) {
/* Does I countain J ? */
if (i != j && rects[j].width) {
if (rects[j].x >= rects[i].x && rects[j].x + rects[j].width <= rects[i].x + rects[i].width &&
rects[j].y >= rects[i].y && rects[j].y + rects[j].height <= rects[i].y + rects[i].height) {
rects[j].width = 0;
valid--;
}
}
}
}
if (valid < 1) {
fprintf(stderr, "No usable RandR output found\n");
return;
}
xcb_rectangle_t r[valid];
for (i = j = 0; i < num && j < valid; i++)
if (rects[i].width != 0)
r[j++] = rects[i];
monitor_create_chain(r, valid);
}
void
get_xinerama_monitors (void)
{
xcb_xinerama_query_screens_reply_t *xqs_reply;
xcb_xinerama_screen_info_iterator_t iter;
int screens;
xqs_reply = xcb_xinerama_query_screens_reply(c,
xcb_xinerama_query_screens_unchecked(c), NULL);
iter = xcb_xinerama_query_screens_screen_info_iterator(xqs_reply);
screens = iter.rem;
xcb_rectangle_t rects[screens];
/* Fetch all the screens first */
for (int i = 0; iter.rem; i++) {
rects[i].x = iter.data->x_org;
rects[i].y = iter.data->y_org;
rects[i].width = iter.data->width;
rects[i].height = iter.data->height;
xcb_xinerama_screen_info_next(&iter);
}
free(xqs_reply);
monitor_create_chain(rects, screens);
}
xcb_visualid_t
get_visual (void)
{
xcb_depth_iterator_t iter;
iter = xcb_screen_allowed_depths_iterator(scr);
/* Try to find a RGBA visual */
while (iter.rem) {
xcb_visualtype_t *vis = xcb_depth_visuals(iter.data);
if (iter.data->depth == 32)
return vis->visual_id;
xcb_depth_next(&iter);
}
/* Fallback to the default one */
return scr->root_visual;
}
void
xconn (void)
{
/* Connect to X */
c = xcb_connect (NULL, NULL);
if (xcb_connection_has_error(c)) {
fprintf(stderr, "Couldn't connect to X\n");
exit(EXIT_FAILURE);
}
/* Grab infos from the first screen */
scr = xcb_setup_roots_iterator(xcb_get_setup(c)).data;
/* Try to get a RGBA visual and build the colormap for that */
visual = get_visual();
colormap = xcb_generate_id(c);
xcb_create_colormap(c, XCB_COLORMAP_ALLOC_NONE, colormap, scr->root, visual);
}
void
init (void)
{
/* Load the fonts */
main_font = font_load(mfont ? mfont : "fixed");
if (!main_font)
exit(EXIT_FAILURE);
alt_font = font_load(afont ? afont : "fixed");
if (!alt_font)
exit(EXIT_FAILURE);
/* To make the alignment uniform */
main_font->height = alt_font->height = max(main_font->height, alt_font->height);
/* Generate a list of screens */
const xcb_query_extension_reply_t *qe_reply;
/* Initialiaze monitor list head and tail */
monhead = montail = NULL;
/* Check if RandR is present */
qe_reply = xcb_get_extension_data(c, &xcb_randr_id);
if (qe_reply && qe_reply->present) {
get_randr_monitors();
} else {
qe_reply = xcb_get_extension_data(c, &xcb_xinerama_id);
/* Check if Xinerama extension is present and active */
if (qe_reply && qe_reply->present) {
xcb_xinerama_is_active_reply_t *xia_reply;
xia_reply = xcb_xinerama_is_active_reply(c, xcb_xinerama_is_active(c), NULL);
if (xia_reply && xia_reply->state)
get_xinerama_monitors();
free(xia_reply);
}
}
if (!monhead) {
/* If I fits I sits */
if (bw < 0)
bw = scr->width_in_pixels - bx;
/* Adjust the height */
if (bh < 0 || bh > scr->height_in_pixels)
bh = main_font->height + bu + 2;
/* Check the geometry */
if (bx + bw > scr->width_in_pixels || by + bh > scr->height_in_pixels) {
fprintf(stderr, "The geometry specified doesn't fit the screen!\n");
exit(EXIT_FAILURE);
}
/* If no RandR outputs or Xinerama screens, fall back to using whole screen */
monhead = monitor_new(0, 0, bw, scr->height_in_pixels);
}
if (!monhead)
exit(EXIT_FAILURE);
/* For WM that support EWMH atoms */
set_ewmh_atoms();
/* Create the gc for drawing */
gc[GC_DRAW] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_DRAW], monhead->pixmap, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, (const uint32_t []){ fgc, bgc });
gc[GC_CLEAR] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_CLEAR], monhead->pixmap, XCB_GC_FOREGROUND, (const uint32_t []){ bgc });
gc[GC_ATTR] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_ATTR], monhead->pixmap, XCB_GC_FOREGROUND, (const uint32_t []){ ugc });
/* Make the bar visible and clear the pixmap */
for (monitor_t *mon = monhead; mon; mon = mon->next) {
fill_rect(mon->pixmap, gc[GC_CLEAR], 0, 0, mon->width, bh);
xcb_map_window(c, mon->window);
}
xcb_flush(c);
}
void
cleanup (void)
{
if (main_font) {
xcb_close_font(c, main_font->ptr);
free(main_font);
}
if (alt_font) {
xcb_close_font(c, alt_font->ptr);
free(alt_font);
}
while (monhead) {
monitor_t *next = monhead->next;
xcb_destroy_window(c, monhead->window);
xcb_free_pixmap(c, monhead->pixmap);
free(monhead);
monhead = next;
}
xcb_free_colormap(c, colormap);
if (gc[GC_DRAW])
xcb_free_gc(c, gc[GC_DRAW]);
if (gc[GC_CLEAR])
xcb_free_gc(c, gc[GC_CLEAR]);
if (gc[GC_ATTR])
xcb_free_gc(c, gc[GC_ATTR]);
if (c)
xcb_disconnect(c);
}
void
sighandle (int signal)
{
if (signal == SIGINT || signal == SIGTERM)
exit(EXIT_SUCCESS);
}
/* Parse an X-styled geometry string, we don't support signed offsets tho. */
bool
parse_geometry_string (char *str, int *tmp)
{
char *p = str;
int i = 0, j;
if (!str || !str[0])
return false;
/* The leading = is optional */
if (*p == '=')
p++;
while (*p) {
/* A geometry string has only 4 fields */
if (i >= 4) {
fprintf(stderr, "Invalid geometry specified\n");
return false;
}
/* Move on if we encounter a 'x' or '+' */
if (*p == 'x') {
if (i > 0) /* The 'x' must precede '+' */
break;
i++; p++; continue;
}
if (*p == '+') {
if (i < 1) /* Stray '+', skip the first two fields */
i = 2;
else
i++;
p++; continue;
}
/* A digit must follow */
if (!isdigit(*p)) {
fprintf(stderr, "Invalid geometry specified\n");
return false;
}
/* Try to parse the number */
errno = 0;
j = strtoul(p, &p, 10);
if (errno) {
fprintf(stderr, "Invalid geometry specified\n");
return false;
}
tmp[i] = j;
}
return true;
}
void
parse_font_list (char *str)
{
char *tok;
if (!str)
return;
tok = strtok(str, ",");
if (tok)
mfont = tok;
tok = strtok(NULL, ",");
if (tok)
afont = tok;
return;
}
int
main (int argc, char **argv)
{
struct pollfd pollin[2] = {
{ .fd = STDIN_FILENO, .events = POLLIN },
{ .fd = -1 , .events = POLLIN },
};
xcb_generic_event_t *ev;
xcb_expose_event_t *expose_ev;
xcb_button_press_event_t *press_ev;
char input[4096] = {0, };
bool permanent = false;
int geom_v[4] = { -1, -1, 0, 0 };
/* Install the parachute! */
atexit(cleanup);
signal(SIGINT, sighandle);
signal(SIGTERM, sighandle);
/* Connect to the Xserver and initialize scr */
xconn();
/* B/W combo */
dbgc = bgc = parse_color("black", NULL, scr->black_pixel);
dfgc = fgc = parse_color("white", NULL, scr->white_pixel);
ugc = fgc;
char ch;
while ((ch = getopt(argc, argv, "hg:bdf:a:pu:B:F:")) != -1) {
switch (ch) {
case 'h':
printf ("usage: %s [-h | -g | -b | -d | -f | -a | -p | -u | -B | -F]\n"
"\t-h Show this help\n"
"\t-g Set the bar geometry {width}x{height}+{xoffset}+{yoffset}\n"
"\t-b Put bar at the bottom of the screen\n"
"\t-d Force docking (use this if your WM isn't EWMH compliant)\n"
"\t-f Bar font list, comma separated\n"
"\t-p Don't close after the data ends\n"
"\t-u Set the underline/overline height in pixels\n"
"\t-B Set background color in #AARRGGBB\n"
"\t-F Set foreground color in #AARRGGBB\n", argv[0]);
exit (EXIT_SUCCESS);
case 'g': (void)parse_geometry_string(optarg, geom_v); break;
case 'p': permanent = true; break;
case 'b': topbar = false; break;
case 'd': dock = true; break;
case 'f': parse_font_list(optarg); break;
case 'u': bu = strtoul(optarg, NULL, 10); break;
case 'B': dbgc = bgc = parse_color(optarg, NULL, scr->black_pixel); break;
case 'F': dfgc = fgc = parse_color(optarg, NULL, scr->white_pixel); break;
}
}
/* Copy the geometry values in place */
bw = geom_v[0];
bh = geom_v[1];
bx = geom_v[2];
by = geom_v[3];
/* Do the heavy lifting */
init();
/* Get the fd to Xserver */
pollin[1].fd = xcb_get_file_descriptor(c);
for (;;) {
bool redraw = false;
if (poll(pollin, 2, -1) > 0) {
if (pollin[0].revents & POLLHUP) { /* No more data... */
if (permanent) pollin[0].fd = -1; /* ...null the fd and continue polling :D */
else break; /* ...bail out */
}
if (pollin[0].revents & POLLIN) { /* New input, process it */
if (fgets(input, sizeof(input), stdin) == NULL)
break; /* EOF received */
parse(input);
redraw = true;
}
if (pollin[1].revents & POLLIN) { /* Xserver broadcasted an event */
while ((ev = xcb_poll_for_event(c))) {
expose_ev = (xcb_expose_event_t *)ev;
switch (ev->response_type & 0x7F) {
case XCB_EXPOSE:
if (expose_ev->count == 0)
redraw = true;
break;
case XCB_BUTTON_PRESS:
press_ev = (xcb_button_press_event_t *)ev;
{
area_t *area = area_get(press_ev->event, press_ev->event_x);
/* Respond to the click */
if (area && area->button == press_ev->detail) {
write(STDOUT_FILENO, area->cmd, strlen(area->cmd));
write(STDOUT_FILENO, "\n", 1);
}
}
break;
}
free(ev);
}
}
}
if (redraw) { /* Copy our temporary pixmap onto the window */
for (monitor_t *mon = monhead; mon; mon = mon->next) {
xcb_copy_area(c, mon->pixmap, mon->window, gc[GC_DRAW], 0, 0, 0, 0, mon->width, bh);
}
}
xcb_flush(c);
}
return EXIT_SUCCESS;
}
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