i3status/src/output.c

// vim:ts=4:sw=4:expandtab
#include <config.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <ctype.h>

#include "i3status.h"

/*
 * Returns the correct color format for dzen (^fg(color)), xmobar (<fc=color>)
 * or lemonbar (%{Fcolor})
 *
 */
char *color(const char *colorstr) {
    static char colorbuf[32];
    if (!cfg_getbool(cfg_general, "colors")) {
        colorbuf[0] = '\0';
        return colorbuf;
    }
    if (output_format == O_DZEN2)
        (void)snprintf(colorbuf, sizeof(colorbuf), "^fg(%s)", cfg_getstr(cfg_general, colorstr));
    else if (output_format == O_XMOBAR)
        (void)snprintf(colorbuf, sizeof(colorbuf), "<fc=%s>", cfg_getstr(cfg_general, colorstr));
    else if (output_format == O_LEMONBAR)
        (void)snprintf(colorbuf, sizeof(colorbuf), "%%{F%s}", cfg_getstr(cfg_general, colorstr));
    else if (output_format == O_TERM) {
        /* The escape-sequence for color is <CSI><col>;1m (bright/bold
         * output), where col is a 3-bit rgb-value with b in the
         * least-significant bit. We round the given color to the
         * nearist 3-bit-depth color and output the escape-sequence */
        char *str = cfg_getstr(cfg_general, colorstr);
        int col = strtol(str + 1, NULL, 16);
        int r = (col & (0xFF << 0)) / 0x80;
        int g = (col & (0xFF << 8)) / 0x8000;
        int b = (col & (0xFF << 16)) / 0x800000;
        col = (r << 2) | (g << 1) | b;
        (void)snprintf(colorbuf, sizeof(colorbuf), "\033[3%d;1m", col);
    }
    return colorbuf;
}

/*
 * Some color formats (xmobar) require to terminate colors again
 *
 */
char *endcolor(void) {
    if (output_format == O_XMOBAR)
        return "</fc>";
    else if (output_format == O_TERM)
        return "\033[0m";
    else
        return "";
}

void print_separator(const char *separator) {
    if (output_format == O_I3BAR || strlen(separator) == 0)
        return;

    if (output_format == O_DZEN2)
        printf("^fg(%s)%s^fg()", cfg_getstr(cfg_general, "color_separator"), separator);
    else if (output_format == O_XMOBAR)
        printf("<fc=%s>%s</fc>", cfg_getstr(cfg_general, "color_separator"), separator);
    else if (output_format == O_LEMONBAR)
        printf("%%{F%s}%s%%{F-}", cfg_getstr(cfg_general, "color_separator"), separator);
    else if (output_format == O_TERM)
        printf("%s%s%s", color("color_separator"), separator, endcolor());
    else if (output_format == O_NONE)
        printf("%s", separator);
}

/*
 * The term-output hides the cursor. We call this on exit to reset that.
 */
void reset_cursor(void) {
    printf("\033[?25h");
}

/*
 * Escapes ampersand, less-than, greater-than, single-quote, and double-quote
 * characters with the corresponding Pango markup strings if markup is enabled.
 * See the glib implementation:
 * https://git.gnome.org/browse/glib/tree/glib/gmarkup.c?id=03db1f455b4265654e237d2ad55464b4113cba8a#n2142
 *
 */
void maybe_escape_markup(char *text, char **buffer) {
    if (markup_format == M_NONE) {
        *buffer += sprintf(*buffer, "%s", text);
        return;
    }
    for (; *text != '\0'; text++) {
        switch (*text) {
            case '&':
                *buffer += sprintf(*buffer, "%s", "&amp;");
                break;
            case '<':
                *buffer += sprintf(*buffer, "%s", "&lt;");
                break;
            case '>':
                *buffer += sprintf(*buffer, "%s", "&gt;");
                break;
            case '\'':
                *buffer += sprintf(*buffer, "%s", "&apos;");
                break;
            case '"':
                *buffer += sprintf(*buffer, "%s", "&quot;");
                break;
            default:
                if ((0x1 <= *text && *text <= 0x8) ||
                    (0xb <= *text && *text <= 0xc) ||
                    (0xe <= *text && *text <= 0x1f)) {
                    *buffer += sprintf(*buffer, "&#x%x;", *text);
                } else {
                    *(*buffer)++ = *text;
                }
                break;
        }
    }
}

/*
 * remove leading spaces
 */
char *ltrim(const char *s) {
    while (isspace(*s))
        ++s;
    return sstrdup(s);
}

/*
 * remove trailing spaces
 */
char *rtrim(const char *s) {
    char *r = sstrdup(s);
    if (r != NULL) {
        char *fr = r + strlen(s) - 1;
        while ((isspace(*fr) || *fr == 0) && fr >= r)
            --fr;
        *++fr = 0;
    }
    return r;
}

/*
 * remove leading & trailing spaces
 */
char *trim(const char *s) {
    char *r = rtrim(s);
    char *f = ltrim(r);
    free(r);
    return f;
}