Created
February 7, 2020 14:56
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| pub fn header(otext, divider string) string { | |
| cols, _ := get_terminal_size() | |
| mut text := otext | |
| if text.len > 0 { | |
| text = ' $text ' | |
| } | |
| // clip the text if it is too long | |
| text = if cols > text.len + 1 + 2*divider.len { text } else { text[0..cols-(1+2*divider.len)] } | |
| // make the text align with the terminal size: | |
| if (text.len % 2) != (cols % 2 ) { | |
| text += divider | |
| } | |
| filler := divider.repeat( (cols - text.len) / (2*divider.len) ) | |
| return filler + text + filler | |
| } | |
| fn test_header(){ | |
| divider := term.h_divider('-') | |
| term_width := divider.len | |
| empty_header := term.header('', '-') | |
| short_header := term.header('reasonable header', '-') | |
| very_long_header := term.header(['abc'].repeat(500).join(' '), '-') | |
| eprintln( empty_header ) | |
| eprintln( short_header ) | |
| eprintln(term.header('another longer header', '-+-')) | |
| eprintln(term.header('another longer header', '-')) | |
| eprintln(term.header('short','-')) | |
| eprintln(term.header('12345','-')) | |
| eprintln(term.header('1234','-')) | |
| eprintln(term.header('123','-')) | |
| eprintln(term.header('12','-')) | |
| eprintln(term.header('1','-')) | |
| eprintln( very_long_header ) | |
| eprintln(term.header('','-')) | |
| assert term_width == empty_header.len | |
| assert term_width == short_header.len | |
| assert term_width == very_long_header.len | |
| } |
pub fn header(text, divider string) string {
cols, _ := get_terminal_size()
text_limit := if cols > text.len + 1 + 2*divider.len {
text.len
} else {
cols-(1+2*divider.len)
}
text_limit_alligned := if (text_limit % 2) != (cols % 2 ) {
text_limit + 1
} else {
text_limit
}
text_start := (cols - text_limit_alligned)/2
filler_line := divider.repeat( 1 + cols / divider.len )[0..cols]
result := if text.len == 0 {
filler_line
} else {
filler_line[0..text_start-1] + ' ' + text[0..(text_limit)] + ' ' + filler_line[text_start+text_limit+1..cols]
}
return result
}This one produces:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
------------------------------ reasonable header -------------------------------
_-/\_-/\_-/\_-/\_-/\_-/\_-/\ another longer header \_-/\_-/\_-/\_-/\_-/\_-/\_-/\
---------------------------- another longer header -----------------------------
------------------------------------ short -------------------------------------
------------------------------------ 12345 -------------------------------------
------------------------------------- 1234 -------------------------------------
------------------------------------- 123 --------------------------------------
-------------------------------------- 12 --------------------------------------
-------------------------------------- 1 ---------------------------------------
abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc abc a -
abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd ab -
--------------------------------------------------------------------------------
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Produces: