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Make the screen repainting code slightly more robust by keeping track of whether clr_eol may be needed to clear 'debris' from e.g. resizes

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darcs-hash:20061009132642-ac50b-6162ed86a97771a8da4be2adff3ad6a4f1851616.gz
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axel 2006-10-09 23:26:42 +10:00
parent 286e110fb1
commit 9a0f712e29
2 changed files with 43 additions and 6 deletions
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41
screen.c
View file

@ -280,7 +280,18 @@ static void s_check_status( screen_t *s)
if( changed )
{
/*
Ok, someone has been messing with our screen. We will want
to repaint. However, we do not know where the cursor is. It
is our best bet that we are still on the same line, so we
move to the beginning of the line, reset the modelled screen
contents, and then set the modeled curor y-pos to its
earlier value.
*/
int prev_line = s->actual_cursor[1];
write( 1, "\r", 1 );
s_reset( s );
s->actual_cursor[1] = prev_line;
}
}
@ -307,6 +318,8 @@ static void s_reset_arr( array_list_t *l )
void s_init( screen_t *s )
{
CHECK( s, );
memset( s, 0, sizeof(screen_t));
sb_init( &s->actual_prompt );
}
@ -314,6 +327,8 @@ void s_init( screen_t *s )
void s_destroy( screen_t *s )
{
CHECK( s, );
s_reset_arr( &s->actual );
al_destroy( &s->actual );
s_reset_arr( &s->desired );
@ -578,14 +593,17 @@ static void s_update( screen_t *scr, wchar_t *prompt )
int prompt_width = calc_prompt_width( prompt );
int current_width=0;
int screen_width = common_get_width();
int resize = 0;
int need_clear = scr->need_clear;
buffer_t output;
scr->need_clear = 0;
b_init( &output );
if( scr->actual_width != screen_width )
{
resize = 1;
need_clear = 1;
s_move( scr, &output, 0, 0 );
scr->actual_width = screen_width;
s_reset( scr );
@ -607,7 +625,7 @@ static void s_update( screen_t *scr, wchar_t *prompt )
int start_pos = (i==0?prompt_width:0);
current_width = start_pos;
if( resize )
if( need_clear )
{
s_move( scr, &output, start_pos, i );
s_write_mbs( &output, clr_eol);
@ -695,8 +713,17 @@ void s_write( screen_t *s,
int i;
int cursor_arr[2];
int prompt_width = calc_prompt_width( prompt );
int screen_width = common_get_width();
int prompt_width;
int screen_width;
CHECK( s, );
CHECK( prompt, );
CHECK( b, );
CHECK( c, );
CHECK( indent, );
prompt_width = calc_prompt_width( prompt );
screen_width = common_get_width();
s_check_status( s );
@ -767,8 +794,10 @@ void s_write( screen_t *s,
void s_reset( screen_t *s )
{
CHECK( s, );
s_reset_arr( &s->actual );
s->actual_cursor[0] = s->actual_cursor[1] = 0;
sb_clear( &s->actual_prompt );
s->need_clear=1;
}

8
screen.h
View file

@ -41,6 +41,14 @@ typedef struct
*/
int actual_width;
/**
This flag is set to true when there is reason to suspect that
the parts of the screen lines where the actual content is not
filled in may be non-empty. This means that a clr_eol command
has to be sent to the terminal at the end of each line.
*/
int need_clear;
/**
These status buffers are used to check if any output has occurred
other than from fish's main loop, in which case we need to redraw.