Struct ContentWindow 

pub struct ContentWindow {
    pub top: usize,
    pub bottom: usize,
    pub len: usize,
    pub height: usize,
}

Holds the information about the displayed window of lines. When there’s too much lines to display in one screen, we can scroll and this struct is responsible for that. Scrolling is done with scroll_to, scroll_up_one, scroll_down_one methods.

Fields

top: usize

The index of the first displayed element.

bottom: usize

The index of the last displayed element + 1.

len: usize

The number of displayble elements.

height: usize

The height of the rect containing the elements.

Implementations

impl ContentWindow

pub const WINDOW_PADDING: usize = 4usize

The padding around the last displayed filename

pub const WINDOW_PADDING_FUZZY: u32 = 3u32

pub const WINDOW_MARGIN_TOP_U16: u16 = 2u16

The space of the top element as an u16 for convenience

pub const WINDOW_MARGIN_BOTTOM: usize = 1usize

The space for the bottom row

pub const HEADER_ROWS: usize = 3usize

How many rows are reserved for the header ?

pub fn new(len: usize, rect_height: usize) -> Self

Returns a new ContentWindow instance with values depending of number of displayable elements and height of the terminal screen.

pub fn set_height(&mut self, terminal_height: usize)

Set the height of file window.

pub fn set_len(&mut self, len: usize)

pub fn scroll_up_one(&mut self, index: usize)

Move the window one line up if possible. Does nothing if the index can’t be reached.

pub fn scroll_down_one(&mut self, index: usize)

Move the window one line down if possible. Does nothing if the index can’t be reached.

pub fn scroll_to(&mut self, index: usize)

Scroll the window to this index if possible. Does nothing if the index can’t be reached.

pub fn reset(&mut self, len: usize)

Reset the window to the first item of the content.

pub fn is_row_in_header(row: u16) -> bool

pub fn preview_page_up(&mut self, skip: usize)

pub fn preview_page_down(&mut self, skip: usize, preview_len: usize)

Trait Implementations

impl Clone for ContentWindow

fn clone(&self) -> ContentWindow

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ContentWindow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ContentWindow

fn default() -> Self

Returns the “default value” for a type.