//! This function goes to at the parent directory
//!
//! @return false in case of error, see global value "fs_g_status" for more detail
//! @return true otherwise
//!
//! @verbatim
//! After, the filtered file list changes and contains the files and directories of the new directory.
//! By default, the file selected in filtered file list is the previous (children) directory.
//! @endverbatim
//!
bool nav_filterlist_gotoparent( void )
{
uint32_t u32_cluster_old_dir;
if (!fat_check_mount_noopen())
return false;
if (0 == fs_g_nav.u32_cluster_sel_dir)
{
fs_g_status = FS_ERR_IS_ROOT; // There aren't parent
return false;
}
// Select and read information about directory ".."
fs_g_nav_fast.u16_entry_pos_sel_file = 1;
if ( !fat_read_dir())
return false;
fat_get_entry_info();
// Save the children directory cluster
u32_cluster_old_dir = fs_g_nav.u32_cluster_sel_dir;
// Select the parent directory via information present in the current directory ".."
fs_g_nav.u32_cluster_sel_dir = fs_g_nav_entry.u32_cluster;
// Select the children directory in new directory (=parent directory)
if( false == nav_filterlist_reset())
return false;
while( nav_filterlist_next() )
{
if (fs_g_nav_entry.u32_cluster == u32_cluster_old_dir)
return true; // It is the children directory
}
fs_g_status = FS_ERR_FS;
return false;
}
//! This function moves back to the parent directory and selects this directory
//!
//! @param b_direction direction of navigation (FS_FIND_NEXT or FS_FIND_PREV)
//!
//! @return The state of the function
//!
static navauto_mov_explorer_rec_t navauto_mov_explorer_updir(bool b_direction)
{
bool b_updir_ok = false;
// To support directory only mode
if (g_navauto_exp_mode == NAVAUTO_MODE_DIRONLY)
return NAVAUTO_MOV_EXPLORER_ERROR;
// To Support subdirectories mode
if (g_navauto_exp_mode == NAVAUTO_MODE_DIRSUB)
{
// If the selection is on the root level
if (g_navauto_u16_dir_level <= g_navauto_u16_dir_level_root)
return NAVAUTO_MOV_EXPLORER_ERROR;
}
#if defined(NAVAUTO_SPEED_OPTIMIZATION) && NAVAUTO_SPEED_OPTIMIZATION == true
if (i_navauto_cache >= 0)
{
if (i_navauto_cache >= NAVAUTO_SPEED_OPTIMIZATION_LEVEL)
{
if (nav_dir_gotoparent())
{
b_updir_ok = true;
i_navauto_cache--;
}
}
else
{
fat_clear_entry_info_and_ptr();
// Look for the "../" directory entry
fs_g_nav_fast.u16_entry_pos_sel_file = 1;
if (!fat_read_dir())
return NAVAUTO_MOV_EXPLORER_ERROR;
fat_get_entry_info();
fs_g_nav.u32_cluster_sel_dir = fs_g_nav_entry.u32_cluster;
fs_g_nav.u16_pos_sel_file = navauto_cache[i_navauto_cache].u16_pos_file;
fs_g_nav_fast.u16_entry_pos_sel_file = navauto_cache[i_navauto_cache].u16_entry_pos_file;
fat_read_dir();
fat_get_entry_info();
i_navauto_cache--;
b_updir_ok = true;
}
}
#else
if (nav_dir_gotoparent())
b_updir_ok = true;
#endif
if (b_updir_ok)
{
// Set folder change bit
bitfield_status.folder_change = 1;
g_navauto_u16_dir_level--;
return NAVAUTO_MOV_EXPLORER_RECURSIVE;
}
else // If it fails, means the pointer is on the root
return NAVAUTO_MOV_EXPLORER_ERROR;
}
