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// vim:sw=4:ts=4:et:
#define _POSIX_C_SOURCE 200809L
#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/xcbext.h>
#if WITH_XINERAMA
#include <xcb/xinerama.h>
#endif
#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, width;
uint16_t char_max;
uint16_t char_min;
xcb_charinfo_t *width_lut;
} font_t;
typedef struct monitor_t {
int x, y, width;
xcb_window_t window;
xcb_pixmap_t pixmap;
struct monitor_t *prev, *next;
} monitor_t;
typedef struct area_t {
unsigned int begin:16;
unsigned int end:16;
bool active:1;
int align:3;
unsigned int button:3;
xcb_window_t window;
char *cmd;
} area_t;
typedef union rgba_t {
struct {
uint8_t b;
uint8_t g;
uint8_t r;
uint8_t a;
};
uint32_t v;
} rgba_t;
typedef struct area_stack_t {
int at, max;
area_t *area;
} 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
};
#define MAX_FONT_COUNT 5
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 *font_list[MAX_FONT_COUNT];
static int font_count = 0;
static int font_index = -1;
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 rgba_t fgc, bgc, ugc;
static rgba_t dfgc, dbgc, dugc;
static area_stack_t area_stack;
void
update_gc (void)
{
xcb_change_gc(c, gc[GC_DRAW], XCB_GC_FOREGROUND, (const uint32_t []){ fgc.v });
xcb_change_gc(c, gc[GC_CLEAR], XCB_GC_FOREGROUND, (const uint32_t []){ bgc.v });
xcb_change_gc(c, gc[GC_ATTR], XCB_GC_FOREGROUND, (const uint32_t []){ ugc.v });
}
void
fill_gradient (xcb_drawable_t d, int x, int y, int width, int height, rgba_t start, rgba_t stop)
{
float i;
const int K = 25; // The number of steps
for (i = 0.; i < 1.; i += (1. / K)) {
// Perform the linear interpolation magic
unsigned int rr = i * stop.r + (1. - i) * start.r;
unsigned int gg = i * stop.g + (1. - i) * start.g;
unsigned int bb = i * stop.b + (1. - i) * start.b;
// The alpha is ignored here
rgba_t step = {
.r = rr,
.g = gg,
.b = bb,
.a = 255,
};
xcb_change_gc(c, gc[GC_DRAW], XCB_GC_FOREGROUND, (const uint32_t []){ step.v });
xcb_poly_fill_rectangle(c, d, gc[GC_DRAW], 1,
(const xcb_rectangle_t []){ { x, i * bh, width, bh / K + 1 } });
}
xcb_change_gc(c, gc[GC_DRAW], XCB_GC_FOREGROUND, (const uint32_t []){ fgc.v });
}
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 } });
}
// Apparently xcb cannot seem to compose the right request for this call, hence we have to do it by
// ourselves.
// The funcion is taken from 'wmdia' (http://wmdia.sourceforge.net/)
xcb_void_cookie_t xcb_poly_text_16_simple(xcb_connection_t * c,
xcb_drawable_t drawable, xcb_gcontext_t gc, int16_t x, int16_t y,
uint32_t len, const uint16_t *str)
{
static const xcb_protocol_request_t xcb_req = {
5, // count
0, // ext
XCB_POLY_TEXT_16, // opcode
1 // isvoid
};
struct iovec xcb_parts[7];
uint8_t xcb_lendelta[2];
xcb_void_cookie_t xcb_ret;
xcb_poly_text_8_request_t xcb_out;
xcb_out.pad0 = 0;
xcb_out.drawable = drawable;
xcb_out.gc = gc;
xcb_out.x = x;
xcb_out.y = y;
xcb_lendelta[0] = len;
xcb_lendelta[1] = 0;
xcb_parts[2].iov_base = (char *)&xcb_out;
xcb_parts[2].iov_len = sizeof(xcb_out);
xcb_parts[3].iov_base = 0;
xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;
xcb_parts[4].iov_base = xcb_lendelta;
xcb_parts[4].iov_len = sizeof(xcb_lendelta);
xcb_parts[5].iov_base = (char *)str;
xcb_parts[5].iov_len = len * sizeof(int16_t);
xcb_parts[6].iov_base = 0;
xcb_parts[6].iov_len = -(xcb_parts[4].iov_len + xcb_parts[5].iov_len) & 3;
xcb_ret.sequence = xcb_send_request(c, 0, xcb_parts + 2, &xcb_req);
return xcb_ret;
}
int
shift (monitor_t *mon, int x, int align, int ch_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, 0, ch_width, bh);
return x;
}
void
draw_lines (monitor_t *mon, int x, int w)
{
/* We can render both at the same time */
if (attrs & ATTR_OVERL)
fill_rect(mon->pixmap, gc[GC_ATTR], x, 0, w, bu);
if (attrs & ATTR_UNDERL)
fill_rect(mon->pixmap, gc[GC_ATTR], x, bh - bu, w, bu);
}
void
draw_shift (monitor_t *mon, int x, int align, int w)
{
x = shift(mon, x, align, w);
draw_lines(mon, x, w);
}
int
draw_char (monitor_t *mon, font_t *cur_font, int x, int align, uint16_t ch)
{
int ch_width = (cur_font->width_lut) ?
cur_font->width_lut[ch - cur_font->char_min].character_width:
cur_font->width;
x = shift(mon, x, align, ch_width);
// xcb accepts string in UCS-2 BE, so swap
ch = (ch >> 8) | (ch << 8);
// The coordinates here are those of the baseline
xcb_poly_text_16_simple(c, mon->pixmap, gc[GC_DRAW],
x, bh / 2 + cur_font->height / 2 - cur_font->descent,
1, &ch);
draw_lines(mon, x, ch_width);
return ch_width;
}
rgba_t
parse_color (const char *str, char **end, const rgba_t def)
{
int string_len;
char *ep;
if (!str)
return def;
// Reset
if (str[0] == '-') {
if (end)
*end = (char *)str + 1;
return def;
}
// Hex representation
if (str[0] != '#') {
if (end)
*end = (char *)str;
fprintf(stderr, "Invalid color specified\n");
return def;
}
errno = 0;
rgba_t tmp = (rgba_t)(uint32_t)strtoul(str + 1, &ep, 16);
if (end)
*end = ep;
// Some error checking is definitely good
if (errno) {
fprintf(stderr, "Invalid color specified\n");
return def;
}
string_len = ep - (str + 1);
switch (string_len) {
case 3:
// Expand the #rgb format into #rrggbb (aa is set to 0xff)
tmp.v = (tmp.v & 0xf00) * 0x1100
| (tmp.v & 0x0f0) * 0x0110
| (tmp.v & 0x00f) * 0x0011;
case 6:
// If the code is in #rrggbb form then assume it's opaque
tmp.a = 255;
break;
case 7:
case 8:
// Colors in #aarrggbb format, those need no adjustments
break;
default:
fprintf(stderr, "Invalid color specified\n");
return def;
}
// Premultiply the alpha in
if (tmp.a) {
// The components are clamped automagically as the rgba_t is made of uint8_t
return (rgba_t){
.r = (tmp.r * tmp.a) / 255,
.g = (tmp.g * tmp.a) / 255,
.b = (tmp.b * tmp.a) / 255,
.a = tmp.a,
};
}
return (rgba_t)0U;
}
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 btn, const int x)
{
// Looping backwards ensures that we get the innermost area first
for (int i = area_stack.at - 1; i >= 0; i--) {
area_t *a = &area_stack.area[i];
if (a->window == win && a->button == btn && x >= a->begin && x < a->end)
return a;
}
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 < area_stack.at; i++) {
area_t *a = &area_stack.area[i];
if (a->window == win && a->align == align && !a->active) {
a->begin -= delta;
a->end -= delta;
}
}
}
bool
area_add (char *str, const char *optend, char **end, monitor_t *mon, const int x, const int align, const int button)
{
int i;
char *trail;
area_t *a;
// A wild close area tag appeared!
if (*str != ':') {
*end = str;
// Find most recent unclosed area.
for (i = area_stack.at - 1; i >= 0 && !area_stack.area[i].active; i--)
;
a = &area_stack.area[i];
// Basic safety checks
if (!a->cmd || a->align != align || a->window != mon->window) {
fprintf(stderr, "Invalid geometry for the clickable area\n");
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;
}
a->active = false;
return true;
}
if (area_stack.at + 1 > area_stack.max) {
fprintf(stderr, "Cannot add any more clickable areas (used %d/%d)\n",
area_stack.at, area_stack.max);
return false;
}
a = &area_stack.area[area_stack.at++];
// Found the closing : and check if it's just an escaped one
for (trail = strchr(++str, ':'); trail && trail[-1] == '\\'; trail = strchr(trail + 1, ':'))
;
// Find the trailing : and make sure it's within the formatting block, also reject empty commands
if (!trail || str == trail || trail > optend) {
*end = str;
return false;
}
*trail = '\0';
// Sanitize the user command by unescaping all the :
for (char *needle = str; *needle; needle++) {
int delta = trail - &needle[1];
if (needle[0] == '\\' && needle[1] == ':') {
memmove(&needle[0], &needle[1], delta);
needle[delta] = 0;
}
}
// This is a pointer to the string buffer allocated in the main
a->cmd = str;
a->active = true;
a->align = align;
a->begin = x;
a->window = mon->window;
a->button = button;
*end = trail + 1;
return true;
}
bool
font_has_glyph (font_t *font, const uint16_t c)
{
if (c < font->char_min || c > font->char_max)
return false;
if (font->width_lut && font->width_lut[c - font->char_min].character_width == 0)
return false;
return true;
}
// returns NULL if character cannot be printed
font_t *
select_drawable_font (const uint16_t c)
{
// If the user has specified a font to use, try that first.
if (font_index != -1 && font_has_glyph(font_list[font_index - 1], c))
return font_list[font_index - 1];
// If the end is reached without finding an appropriate font, return NULL.
// If the font can draw the character, return it.
for (int i = 0; i < font_count; i++) {
if (font_has_glyph(font_list[i], c))
return font_list[i];
}
return NULL;
}
void
parse (char *text)
{
font_t *cur_font;
monitor_t *cur_mon;
int pos_x, align, button;
char *p = text, *block_end, *ep;
rgba_t tmp;
pos_x = 0;
align = ALIGN_L;
cur_mon = monhead;
// Reset the stack position
area_stack.at = 0;
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[0] == '%' && p[1] == '{' && (block_end = strchr(p++, '}'))) {
p++;
while (p < block_end) {
int w;
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';
if (!area_add(p, block_end, &p, cur_mon, pos_x, align, button))
return;
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, dugc); 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;
case 'O':
errno = 0;
w = (int) strtoul(p, &p, 10);
if (errno)
continue;
draw_shift(cur_mon, pos_x, align, w);
pos_x += w;
area_shift(cur_mon->window, align, w);
break;
case 'T':
if (*p == '-') { //Reset to automatic font selection
font_index = -1;
p++;
break;
} else if (isdigit(*p)) {
font_index = (int)strtoul(p, &ep, 10);
// User-specified 'font_index' ∊ (0,font_count]
// Otherwise just fallback to the automatic font selection
if (!font_index || font_index > font_count)
font_index = -1;
p = ep;
break;
} else {
fprintf(stderr, "Invalid font slot \"%c\"\n", *p++); //Swallow the token
break;
}
// In case of error keep parsing after the closing }
default:
p = block_end;
}
}
// Eat the trailing }
p++;
} else { // utf-8 -> ucs-2
// Escaped % symbol, eat the first one
if (p[0] == '%' && p[1] == '%')
p++;
uint8_t *utf = (uint8_t *)p;
uint16_t ucs;
// ASCII
if (utf[0] < 0x80) {
ucs = utf[0];
p += 1;
}
// Two byte utf8 sequence
else if ((utf[0] & 0xe0) == 0xc0) {
ucs = (utf[0] & 0x1f) << 6 | (utf[1] & 0x3f);
p += 2;
}
// Three byte utf8 sequence
else if ((utf[0] & 0xf0) == 0xe0) {
ucs = (utf[0] & 0xf) << 12 | (utf[1] & 0x3f) << 6 | (utf[2] & 0x3f);
p += 3;
}
// Four byte utf8 sequence
else if ((utf[0] & 0xf8) == 0xf0) {
ucs = 0xfffd;
p += 4;
}
// Five byte utf8 sequence
else if ((utf[0] & 0xfc) == 0xf8) {
ucs = 0xfffd;
p += 5;
}
// Six byte utf8 sequence
else if ((utf[0] & 0xfe) == 0xfc) {
ucs = 0xfffd;
p += 6;
}
// Not a valid utf-8 sequence
else {
ucs = utf[0];
p += 1;
}
cur_font = select_drawable_font(ucs);
if (!cur_font)
continue;
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);
}
}
}
void
font_load (const char *pattern)
{
if (font_count >= MAX_FONT_COUNT) {
fprintf(stderr, "Max font count reached. Could not load font \"%s\"\n", pattern);
return;
}
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(pattern), pattern);
if (xcb_request_check (c, cookie)) {
fprintf(stderr, "Could not load font \"%s\"\n", pattern);
return;
}
font_t *ret = calloc(1, sizeof(font_t));
if (!ret)
return;
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->width = font_info->max_bounds.character_width;
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;
// Copy over the width lut as it's part of font_info
int lut_size = sizeof(xcb_charinfo_t) * xcb_query_font_char_infos_length(font_info);
if (lut_size) {
ret->width_lut = malloc(lut_size);
memcpy(ret->width_lut, xcb_query_font_char_infos(font_info), lut_size);
}
free(font_info);
font_list[font_count++] = 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 - 1;
} else {
strut[3] = bh;
strut[10] = mon->x;
strut[11] = mon->x + mon->width - 1;
}
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);
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, 3, "bar");
}
}
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->y = (topbar ? by : height - bh - by) + y;
ret->width = width;
ret->next = ret->prev = NULL;
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,
ret->x, ret->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.v, bgc.v, 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 + r1->height <= r2->y)
{
return -1;
}
if (r1->x > r2->x || r1->y + r1->height > 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;
// Use the first font height as all the font heights have been set to the biggest of the set
if (bh < 0 || bh > height)
bh = font_list[0]->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);
if (!mon)
break;
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) {
free(oi_reply);
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;
}
// There's no need to handle rotated screens here (see #69)
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 contain 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);
}
#ifdef WITH_XINERAMA
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);
}
#endif
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;
}
// Parse an X-styled geometry string, we don't support signed offsets though.
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
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 (char *wm_name)
{
// Try to load a default font
if (!font_count)
font_load("fixed");
// We tried and failed hard, there's something wrong
if (!font_count)
exit(EXIT_FAILURE);
// To make the alignment uniform, find maximum height
int maxh = font_list[0]->height;
for (int i = 1; i < font_count; i++)
maxh = max(maxh, font_list[i]->height);
// Set maximum height to all fonts
for (int i = 0; i < font_count; i++)
font_list[i]->height = maxh;
// Generate a list of screens
const xcb_query_extension_reply_t *qe_reply;
// Initialize 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();
}
#if WITH_XINERAMA
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);
}
}
#endif
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 = maxh + 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, (const uint32_t []){ fgc.v });
gc[GC_CLEAR] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_CLEAR], monhead->pixmap, XCB_GC_FOREGROUND, (const uint32_t []){ bgc.v });
gc[GC_ATTR] = xcb_generate_id(c);
xcb_create_gc(c, gc[GC_ATTR], monhead->pixmap, XCB_GC_FOREGROUND, (const uint32_t []){ ugc.v });
// 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);
// Make sure that the window really gets in the place it's supposed to be
// Some WM such as Openbox need this
xcb_configure_window(c, mon->window, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, (const uint32_t []){ mon->x, mon->y });
// Set the WM_NAME atom to the user specified value
if (wm_name)
xcb_change_property(c, XCB_PROP_MODE_REPLACE, mon->window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8 ,strlen(wm_name), wm_name);
}
xcb_flush(c);
}
void
cleanup (void)
{
free(area_stack.area);
for (int i = 0; i < font_count; i++) {
xcb_close_font(c, font_list[i]->ptr);
free(font_list[i]->width_lut);
free(font_list[i]);
}
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);
}
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 };
int ch, areas;
char *wm_name;
// Install the parachute!
atexit(cleanup);
signal(SIGINT, sighandle);
signal(SIGTERM, sighandle);
// B/W combo
dbgc = bgc = (rgba_t)0x00000000U;
dfgc = fgc = (rgba_t)0xffffffffU;
dugc = ugc = fgc;
// A safe default
areas = 10;
wm_name = NULL;
// Connect to the Xserver and initialize scr
xconn();
while ((ch = getopt(argc, argv, "hg:bdf:a:pu:B:F:U:n:")) != -1) {
switch (ch) {
case 'h':
printf ("lemonbar version %s\n", VERSION);
printf ("usage: %s [-h | -g | -b | -d | -f | -a | -p | -n | -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 the bar at the bottom of the screen\n"
"\t-d Force docking (use this if your WM isn't EWMH compliant)\n"
"\t-f Set the font name to use\n"
"\t-a Number of clickable areas available (default is 10)\n"
"\t-p Don't close after the data ends\n"
"\t-n Set the WM_NAME atom to the specified value for this bar\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 'n': wm_name = strdup(optarg); break;
case 'b': topbar = false; break;
case 'd': dock = true; break;
case 'f': font_load(optarg); break;
case 'u': bu = strtoul(optarg, NULL, 10); break;
case 'B': dbgc = bgc = parse_color(optarg, NULL, (rgba_t)0x00000000U); break;
case 'F': dfgc = fgc = parse_color(optarg, NULL, (rgba_t)0xffffffffU); break;
case 'U': dugc = ugc = parse_color(optarg, NULL, fgc); break;
case 'a': areas = strtoul(optarg, NULL, 10); break;
}
}
// Initialize the stack holding the clickable areas
area_stack.at = 0;
area_stack.max = areas;
if (areas) {
area_stack.area = calloc(areas, sizeof(area_t));
if (!area_stack.area) {
fprintf(stderr, "Could not allocate enough memory for %d clickable areas, try lowering the number\n", areas);
return EXIT_FAILURE;
}
}
else
area_stack.area = NULL;
// 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(wm_name);
// The string is strdup'd when the command line arguments are parsed
free(wm_name);
// Get the fd to Xserver
pollin[1].fd = xcb_get_file_descriptor(c);
for (;;) {
bool redraw = false;
// If connection is in error state, then it has been shut down.
if (xcb_connection_has_error(c))
break;
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) { // The event comes from the Xorg server
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->detail, press_ev->event_x);
// Respond to the click
if (area) {
(void)write(STDOUT_FILENO, area->cmd, strlen(area->cmd));
(void)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;
}