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#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xft/Xft.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include "pipe.h"
#include "bardata.h"
Display* display;
Window win;
GC gc;
XftFont* font = NULL;
static int bar_width = 1000;
static float width_ratio = 1;
static int err_code = 1;
void die(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
putc('\n', stderr);
exit(err_code);
}
size_t utf8_strlen(const char *s) {
size_t len = 0;
while (*s) {
if ((*s & 0xC0) != 0x80) len++;
s++;
}
return len;
}
void load_font(const char* font_name) {
XftFont* new_font = XftFontOpenName(display, DefaultScreen(display), font_name);
if (new_font == NULL) {
fprintf(stderr, "cannot open font %s\n", font_name);
return;
}
if (font != NULL) {
XftFontClose(display, font);
}
font = new_font;
}
void init_x(void) {
display = XOpenDisplay(NULL);
if (display == NULL) {
die("could not open X display");
}
XSetWindowAttributes win_attr = {
.override_redirect = 1,
.background_pixel = 0x202020,
.event_mask = ExposureMask | PropertyChangeMask,
};
Screen* screen = DefaultScreenOfDisplay(display);
bar_width = WidthOfScreen(screen);
win = XCreateWindow(
display,
DefaultRootWindow(display),
0, 0,
bar_width, bar_height,
0,
CopyFromParent,
InputOutput,
CopyFromParent,
CWOverrideRedirect | CWBackPixel | CWEventMask,
&win_attr
);
XClassHint class_hint;
class_hint.res_name = "tsarbar";
class_hint.res_class = "Bar";
XSetClassHint(display, win, &class_hint);
XMapWindow(display, win);
load_font("monospace:size=10");
gc = XCreateGC(display, win, 0, NULL);
XSetForeground(display, gc, 0xFFFFFF);
XLowerWindow(display, win);
XFlush(display);
}
void deinit_x(void) {
XftFontClose(display, font);
XUnmapWindow(display, win);
XDestroyWindow(display, win);
}
void draw_text(
comp_t *comp,
int x,
int y
) {
XftDraw* xft_draw = XftDrawCreate(
display,
win,
DefaultVisual(display, DefaultScreen(display)),
DefaultColormap(display, DefaultScreen(display))
);
size_t width = font->max_advance_width * utf8_strlen(comp->data);
width += comp->margin_left + comp->margin_right;
XftDrawRect(xft_draw, comp->bg, x, y, width, bar_height);
x += comp->margin_left;
int dy = y + (bar_height - font->height) / 2 + font->ascent;
XftDrawStringUtf8(
xft_draw,
comp->fg,
font,
x,
dy,
(const FcChar8*)comp->data,
strlen(comp->data)
);
XftDrawDestroy(xft_draw);
}
void draw_comp_set(float pos_ratio, comp_t **set, int size) {
int width = (size - 1) * comp_gap;
for (int i = 0; i < size; i++) {
comp_t *comp = set[i];
int margin = comp->margin_left + comp->margin_right;
width += font->max_advance_width * utf8_strlen(comp->data) + margin;
}
int x = (bar_width - width) * pos_ratio;
x += padding * 2*(0.5 - pos_ratio); // Magic formula lol
int y = 0;//(bar_height - font->height) / 2;
for (int i = 0; i < size; i++) {
comp_t *comp = set[i];
draw_text(comp, x, y);
int margin = comp->margin_left + comp->margin_right;
x += font->max_advance_width * utf8_strlen(comp->data) + margin;
x += comp_gap;
}
}
int main(void) {
init_pipe();
init_x();
init_bardata();
while (true) {
XEvent ev;
while (XPending(display))
XNextEvent(display, &ev);
XClearWindow(display, win);
XResizeWindow(display, win, bar_width, bar_height);
draw_comp_set(0, comps_left, left_size);
draw_comp_set(0.5, comps_center, center_size);
draw_comp_set(1, comps_right, right_size);
XFlush(display);
await_change();
}
deinit_x();
return 0;
}
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