//! This function goes to a position in filtered file list
//!
//! @param u16_newpos new position to select (0 is the first position)
//!
//! @return false in case of error, see global value "fs_g_status" for more detail
//! @return true otherwise
//!
bool nav_filterlist_goto( uint16_t u16_newpos )
{
if (u16_newpos == FS_NO_SEL)
return nav_filterlist_reset();
if( u16_newpos < (fs_g_nav.u16_pos_filterlist/2) )
{
// Restart at the beginning of list to accelerate search
if( !nav_filterlist_reset() )
return false;
}
if( FS_NO_SEL == fs_g_nav.u16_pos_filterlist )
if( !nav_filterlist_next() )
return false; // No file available
while( u16_newpos > fs_g_nav.u16_pos_filterlist )
{
if( !nav_filterlist_next() )
break;
}
while( u16_newpos < fs_g_nav.u16_pos_filterlist )
{
if( !nav_filterlist_previous() )
break;
}
return (u16_newpos == fs_g_nav.u16_pos_filterlist);
}
//! This function goes to the previous position in filtered file list
//!
//! @return false in case of error, see global value "fs_g_status" for more detail
//! @return true otherwise
//!
bool nav_filterflat_previous( void )
{
uint16_t u16_save_current_pos;
u16_save_current_pos = nav_filterlist_get();
if( nav_filterlist_previous() )
{
while( 1 )
{
if( !nav_file_isdir() )
{
fs_g_nav.u16_flat_pos_offset = ((fs_g_nav.u16_flat_pos_offset +u16_save_current_pos) -nav_filterlist_get()) -1;
return true; // New position valid
}
// The file is a dir then enter in this
if( !nav_dir_cd() )
return false;
if( !nav_filterlist_next() )
{
// Dir empty then goes to parent and dir is the new selection
nav_filterlist_gotoparent();
fs_g_nav.u16_flat_pos_offset = ((fs_g_nav.u16_flat_pos_offset +u16_save_current_pos) -nav_filterlist_get()) -1;
return true;
}
fs_g_nav.u8_flat_dir_level++;
// Go to end of the dir
while( nav_filterlist_next() );
}
}
// Beginning of current directory then goes to parent
if( 0 == fs_g_nav.u8_flat_dir_level )
return false; // beginning of list FLAT
if( !nav_filterlist_gotoparent() )
return false;
fs_g_nav.u8_flat_dir_level--;
fs_g_nav.u16_flat_pos_offset -= (nav_filterlist_get()+1);
return true;
}
