slock/patch/message.c
2021-06-08 13:29:12 +02:00

94 lines
2.2 KiB
C

#include <X11/extensions/Xinerama.h>
/* global count to prevent repeated error messages */
int count_error = 0;
static void
writemessage(Display *dpy, Window win, int screen)
{
int len, line_len, width, height, s_width, s_height, i, j, k, tab_replace, tab_size;
XGCValues gr_values;
XFontStruct *fontinfo;
XColor color, dummy;
XineramaScreenInfo *xsi;
GC gc;
fontinfo = XLoadQueryFont(dpy, font_name);
if (fontinfo == NULL) {
if (count_error == 0) {
fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
count_error++;
}
return;
}
tab_size = 8 * XTextWidth(fontinfo, " ", 1);
XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
text_color, &color, &dummy);
gr_values.font = fontinfo->fid;
gr_values.foreground = color.pixel;
gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
/* To prevent "Uninitialized" warnings. */
xsi = NULL;
/*
* Start formatting and drawing text
*/
len = strlen(message);
/* Max max line length (cut at '\n') */
line_len = 0;
k = 0;
for (i = j = 0; i < len; i++) {
if (message[i] == '\n') {
if (i - j > line_len)
line_len = i - j;
k++;
i++;
j = i;
}
}
/* If there is only one line */
if (line_len == 0)
line_len = len;
if (XineramaIsActive(dpy)) {
xsi = XineramaQueryScreens(dpy, &i);
s_width = xsi[0].width;
s_height = xsi[0].height;
} else {
s_width = DisplayWidth(dpy, screen);
s_height = DisplayHeight(dpy, screen);
}
height = s_height*3/7 - (k*20)/3;
width = (s_width - XTextWidth(fontinfo, message, line_len))/2;
/* Look for '\n' and print the text between them. */
for (i = j = k = 0; i <= len; i++) {
/* i == len is the special case for the last line */
if (i == len || message[i] == '\n') {
tab_replace = 0;
while (message[j] == '\t' && j < i) {
tab_replace++;
j++;
}
XDrawString(dpy, win, gc, width + tab_size*tab_replace, height + 20*k, message + j, i - j);
while (i < len && message[i] == '\n') {
i++;
j = i;
k++;
}
}
}
/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
if (XineramaIsActive(dpy) && xsi != NULL)
XFree(xsi);
}