page_rendering_t pager_t::render() const
{
/**
Try to print the completions. Start by trying to print the
list in PAGER_MAX_COLS columns, if the completions won't
fit, reduce the number of columns by one. Printing a single
column never fails.
*/
page_rendering_t rendering;
rendering.term_width = this->available_term_width;
rendering.term_height = this->available_term_height;
rendering.search_field_shown = this->search_field_shown;
rendering.search_field_line = this->search_field_line;
for (int cols = PAGER_MAX_COLS; cols > 0; cols--)
{
/* Initially empty rendering */
rendering.screen_data.resize(0);
/* Determine how many rows we would need if we had 'cols' columns. Then determine how many columns we want from that. For example, say we had 19 completions. We can fit them into 6 columns, 4 rows, with the last row containing only 1 entry. Or we can fit them into 5 columns, 4 rows, the last row containing 4 entries. Since fewer columns with the same number of rows is better, skip cases where we know we can do better. */
size_t min_rows_required_for_cols = divide_round_up(completion_infos.size(), cols);
size_t min_cols_required_for_rows = divide_round_up(completion_infos.size(), min_rows_required_for_cols);
assert(min_cols_required_for_rows <= cols);
if (cols > 1 && min_cols_required_for_rows < cols)
{
/* Next iteration will be better, so skip this one */
continue;
}
rendering.cols = (size_t)cols;
rendering.rows = min_rows_required_for_cols;
rendering.selected_completion_idx = this->visual_selected_completion_index(rendering.rows, rendering.cols);
if (completion_try_print(cols, prefix, completion_infos, &rendering, suggested_row_start))
{
break;
}
}
return rendering;
}
int main( int argc, char **argv )
{
int i;
int is_quoted=0;
wcstring_list_t comp;
wchar_t *prefix = 0;
int mangle_descriptors = 0;
int result_fd = -1;
set_main_thread();
setup_fork_guards();
/*
This initialization is made early, so that the other init code
can use global_context for memory managment
*/
program_name = L"fish_pager";
wsetlocale( LC_ALL, L"" );
/*
The call signature for fish_pager is a mess. Because we want
to be able to upgrade fish without breaking running
instances, we need to support all previous
modes. Unfortunatly, the two previous ones are a mess. The
third one is designed to be extensible, so hopefully it will
be the last.
*/
if( argc > 1 && argv[1][0] == '-' )
{
/*
Third mode
*/
int completion_fd = -1;
FILE *completion_file;
while( 1 )
{
static struct option
long_options[] =
{
{
"result-fd", required_argument, 0, 'r'
}
,
{
"completion-fd", required_argument, 0, 'c'
}
,
{
"prefix", required_argument, 0, 'p'
}
,
{
"is-quoted", no_argument, 0, 'q'
}
,
{
"help", no_argument, 0, 'h'
}
,
{
"version", no_argument, 0, 'v'
}
,
{
0, 0, 0, 0
}
}
;
int opt_index = 0;
int opt = getopt_long( argc,
argv,
GETOPT_STRING,
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
{
break;
}
case 'r':
{
result_fd = get_fd( optarg );
break;
}
case 'c':
{
completion_fd = get_fd( optarg );
break;
}
case 'p':
{
prefix = str2wcs(optarg);
break;
}
case 'h':
{
print_help( argv[0], 1 );
exit(0);
}
case 'v':
{
debug( 0, L"%ls, version %s\n", program_name, PACKAGE_VERSION );
exit( 0 );
}
case 'q':
{
is_quoted = 1;
}
}
}
if( completion_fd == -1 || result_fd == -1 )
{
debug( 0, _(L"Unspecified file descriptors") );
exit( 1 );
}
if( (completion_file = fdopen( completion_fd, "r" ) ) )
{
read_array( completion_file, comp );
fclose( completion_file );
}
else
{
debug( 0, _(L"Could not read completions") );
wperror( L"fdopen" );
exit( 1 );
}
if( !prefix )
{
prefix = wcsdup( L"" );
}
}
else
{
/*
Second or first mode. These suck, but we need to support
them for backwards compatibility. At least for some
time.
Third mode was implemented in January 2007, and previous
modes should be considered deprecated from that point
forward. A reasonable time frame for removal of the code
below has yet to be determined.
*/
if( argc < 3 )
{
print_help( argv[0], 1 );
exit( 0 );
}
else
{
mangle_descriptors = 1;
prefix = str2wcs( argv[2] );
is_quoted = strcmp( "1", argv[1] )==0;
if( argc > 3 )
{
/*
First mode
*/
for( i=3; i<argc; i++ )
{
wcstring wcs = str2wcstring( argv[i] );
comp.push_back(wcs);
}
}
else
{
/*
Second mode
*/
read_array( stdin, comp );
}
}
}
// debug( 3, L"prefix is '%ls'", prefix );
init( mangle_descriptors, result_fd );
mangle_descriptions( comp );
if( wcscmp( prefix, L"-" ) == 0 )
join_completions( comp );
std::vector<comp_t *> completions = mangle_completions( comp, prefix );
/**
Try to print the completions. Start by trying to print the
list in PAGER_MAX_COLS columns, if the completions won't
fit, reduce the number of columns by one. Printing a single
column never fails.
*/
for( i = PAGER_MAX_COLS; i>0; i-- )
{
switch( completion_try_print( i, prefix, is_quoted, completions ) )
{
case PAGER_RETRY:
break;
case PAGER_DONE:
i=0;
break;
case PAGER_RESIZE:
/*
This means we got a resize event, so we start
over from the beginning. Since it the screen got
bigger, we might be able to fit all completions
on-screen.
*/
i=PAGER_MAX_COLS+1;
break;
}
}
free(prefix );
fwprintf( out_file, L"%ls", out_buff.c_str() );
if( is_ca_mode )
{
writembs(exit_ca_mode);
pager_flush();
}
destroy();
}
