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Improve documentation in screen handling code

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darcs-hash:20070924085602-75c98-0a60a87de51e0dbf7e64221b0382401e72745465.gz
This commit is contained in:
liljencrantz 2007-09-24 18:56:02 +10:00
parent 5938a93018
commit d44dd73682
1 changed files with 20 additions and 9 deletions
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29
screen.c
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@ -779,12 +779,19 @@ void s_write( screen_t *s,
int prompt_width;
int screen_width;
int max_line_width = 0;
int current_line_width = 0;
CHECK( s, );
CHECK( prompt, );
CHECK( b, );
CHECK( c, );
CHECK( indent, );
/*
If we are using a dumb terminal, don't try any fancy stuff,
just print out the text.
*/
if( is_dumb() )
{
char *prompt_narrow = wcs2str( prompt );
@ -798,17 +805,19 @@ void s_write( screen_t *s,
free( buffer_narrow );
return;
}
prompt_width = calc_prompt_width( prompt );
screen_width = common_get_width();
s_check_status( s );
/*
Ignore huge prompts on small screens - only print a two character placeholder...
Ignore prompts wider than the screen - only print a two
character placeholder...
It would be cool to truncate the prompt, but because it can
contain escape sequences, this is harder than you'd think.
*/
if( prompt_width >= screen_width )
{
@ -817,16 +826,17 @@ void s_write( screen_t *s,
}
/*
Ignore impossibly small screens
Completely ignore impossibly small screens
*/
if( screen_width < 4 )
{
return;
}
int max_line_width = 0;
int current_line_width = 0;
/*
Check if we are overflowing
*/
for( i=0; b[i]; i++ )
{
if( b[i] == L'\n' )
@ -847,7 +857,8 @@ void s_write( screen_t *s,
s->desired_cursor[0] = s->desired_cursor[1] = 0;
/*
Check if we are overflowing. If so, give the prompt its own line to improve the situation.
If overflowing, give the prompt its own line to improve the
situation.
*/
if( max_line_width + prompt_width >= screen_width )
{
@ -883,7 +894,7 @@ void s_write( screen_t *s,
if( i== cursor && s->desired_cursor[1] != cursor_arr[1] && b[i] != L'\n' )
{
/**
/*
Ugh. We are placed exactly at the wrapping point of a
wrapped line, move cursor to the line below so the
cursor won't be on the ellipsis which looks