v/vlib/term/term.v

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2020-01-29 05:12:12 +01:00
module term
import os
const (
default_columns_size = 80
default_rows_size = 25
)
// can_show_color_on_stdout returns true if colors are allowed in stdout;
// returns false otherwise.
pub fn can_show_color_on_stdout() bool {
return supports_escape_sequences(1)
}
// can_show_color_on_stderr returns true if colors are allowed in stderr;
// returns false otherwise.
pub fn can_show_color_on_stderr() bool {
return supports_escape_sequences(2)
}
// ok_message returns a colored string with green color.
// If colors are not allowed, returns a given string.
pub fn ok_message(s string) string {
return if can_show_color_on_stdout() { green(s) } else { s }
}
// fail_message returns a colored string with red color.
// If colors are not allowed, returns a given string.
pub fn fail_message(s string) string {
return if can_show_color_on_stdout() { red(s) } else { s }
}
// h_divider returns a horizontal divider line with a dynamic width,
// that depends on the current terminal settings.
pub fn h_divider(divider string) string {
cols, _ := get_terminal_size()
result := divider.repeat(1 + (cols / divider.len))
return result[0..cols]
}
fn supports_escape_sequences(fd int) bool {
$if windows {
return (is_atty(fd) & 0x0004) > 0 && os.getenv('TERM') != 'dumb' // ENABLE_VIRTUAL_TERMINAL_PROCESSING
} $else {
return is_atty(fd) > 0 && os.getenv('TERM') != 'dumb'
}
}