128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
#include <X11/extensions/Xinerama.h>
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/* global count to prevent repeated error messages */
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int count_error = 0;
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static int
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readescapedint(const char *str, int *i) {
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int n = 0;
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if (str[*i])
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++*i;
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while(str[*i] && str[*i] != ';' && str[*i] != 'm') {
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n = 10 * n + str[*i] - '0';
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++*i;
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}
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return n;
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}
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static void
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writemessage(Display *dpy, Window win, int screen)
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{
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int len, line_len, width, height, s_width, s_height, i, k, tab_size, r, g, b, escaped_int, curr_line_len;
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XGCValues gr_values;
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XFontStruct *fontinfo;
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XColor color, dummy;
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XineramaScreenInfo *xsi;
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GC gc;
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fontinfo = XLoadQueryFont(dpy, font_name);
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if (fontinfo == NULL) {
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if (count_error == 0) {
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fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
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fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
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count_error++;
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}
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return;
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}
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tab_size = 8 * XTextWidth(fontinfo, " ", 1);
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XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
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text_color, &color, &dummy);
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gr_values.font = fontinfo->fid;
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gr_values.foreground = color.pixel;
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gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
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/* To prevent "Uninitialized" warnings. */
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xsi = NULL;
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/*
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* Start formatting and drawing text
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*/
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len = strlen(message);
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/* Max max line length (cut at '\n') */
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line_len = curr_line_len = 0;
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k = 0;
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for (i = 0; i < len; i++) {
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if (message[i] == '\n') {
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curr_line_len = 0;
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k++;
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} else if (message[i] == 0x1b) {
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while (i < len && message[i] != 'm') {
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i++;
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}
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if (i == len)
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die("slock: unclosed escape sequence\n");
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} else {
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curr_line_len += XTextWidth(fontinfo, message + i, 1);
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if (curr_line_len > line_len)
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line_len = curr_line_len;
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}
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}
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/* If there is only one line */
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if (line_len == 0)
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line_len = len;
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if (XineramaIsActive(dpy)) {
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xsi = XineramaQueryScreens(dpy, &i);
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s_width = xsi[0].width;
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s_height = xsi[0].height;
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} else {
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s_width = DisplayWidth(dpy, screen);
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s_height = DisplayHeight(dpy, screen);
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}
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height = s_height*3/7 - (k*20)/3;
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width = (s_width - line_len)/2;
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line_len = 0;
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/* print the text while parsing 24 bit color ANSI escape codes*/
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for (i = k = 0; i < len; i++) {
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switch (message[i]) {
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case '\n':
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line_len = 0;
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while (message[i + 1] == '\t') {
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line_len += tab_size;
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i++;
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}
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k++;
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break;
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case 0x1b:
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i++;
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if (message[i] == '[') {
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escaped_int = readescapedint(message, &i);
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if (escaped_int == 39)
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continue;
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if (escaped_int != 38)
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die("slock: unknown escape sequence%d\n", escaped_int);
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if (readescapedint(message, &i) != 2)
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die("slock: only 24 bit color supported\n");
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r = readescapedint(message, &i) & 0xff;
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g = readescapedint(message, &i) & 0xff;
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b = readescapedint(message, &i) & 0xff;
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XSetForeground(dpy, gc, r << 16 | g << 8 | b);
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} else
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die("slock: unknown escape sequence\n");
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break;
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default:
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XDrawString(dpy, win, gc, width + line_len, height + 20 * k, message + i, 1);
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line_len += XTextWidth(fontinfo, message + i, 1);
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}
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}
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/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
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if (XineramaIsActive(dpy) && xsi != NULL)
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XFree(xsi);
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}
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