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% This file implements a function called 'edit_colors' that may be used for
% designing a color scheme interactively. You can define a keybinding for it
% (e.g. "ESC e c") by putting a line like this in your slrnrc file:
%
% setkey article edit_colors "\eec"
%
% The macro illustrates several things:
%
% * How to create and use a linked list in the S-Lang language
% * Interaction with files
% * The slrn select_list_box function
variable Color_List_Root = NULL;
define color_save_colors_to_file ()
{
variable file;
variable fp;
variable x;
if (Color_List_Root == NULL)
return;
#ifdef UNIX
file = ".slrnrc";
#else
file = "slrn.rc";
#endif
if (1 != get_yes_no_cancel ("Save colors"))
return;
file = make_home_filename (file);
file = read_mini ("Save colors to: ", "", file);
!if (strlen (file))
return;
fp = fopen (file, "a");
if (fp == NULL)
verror ("Unable to open %s", file);
x = Color_List_Root;
while (x != NULL)
{
if ((x.fg != NULL) and (x.bg != NULL))
() = fputs (sprintf ("color\t%s\t%s\t%s\n", x.obj, x.fg, x.bg), fp);
x = x.next;
}
() = fclose (fp);
}
define color_store_color (obj, fg, bg)
{
variable x;
x = Color_List_Root;
while (x != NULL)
{
if (x.obj == obj)
break;
x = x.next;
}
if (x == NULL)
{
x = struct { obj, fg, bg, next };
x.next = Color_List_Root;
Color_List_Root = x;
x.obj = obj;
}
x.fg = fg;
x.bg = bg;
}
define color_get_color_for_object (title)
{
variable n;
n = _stkdepth ();
return select_list_box (title,
"black",
"red",
"green",
"brown",
"blue",
"magenta",
"cyan",
"lightgray",
"gray",
"brightred",
"brightgreen",
"yellow",
"brightblue",
"brightmagenta",
"brightcyan",
"white",
"default",
_stkdepth () - n - 1,
0);
}
define edit_colors ()
{
variable n, fg, bg;
variable obj;
forever
{
n = _stkdepth ();
obj = select_list_box ("Object", % title
"EXIT",
"article",
"author",
"boldtext",
"box",
"cursor",
"date",
"description",
"error",
"frame",
"from_myself",
"group",
"grouplens_display",
"header_name",
"header_number",
"headers",
"high_score",
"italicstext",
"menu",
"menu_press",
"message",
"neg_score",
"normal",
"pgpsignature",
"pos_score",
"quotes",
"quotes1",
"quotes2",
"quotes3",
"quotes4",
"quotes5",
"quotes6",
"quotes7",
"response_char",
"selection",
"signature",
"status",
"subject",
"thread_number",
"tilde",
"tree",
"underlinetext",
"unread_subject",
"url",
"verbatim",
_stkdepth () - n - 1,
0);
if ((obj == "EXIT") or (obj == ""))
break;
fg = color_get_color_for_object ("Foreground color for " + obj);
if (fg == "") break;
bg = color_get_color_for_object ("Background color for " + obj);
if (bg == "") break;
set_color (obj, fg, bg);
color_store_color (obj, fg, bg);
call ("redraw");
}
color_save_colors_to_file ();
}
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