Struct Viewport 

pub struct Viewport {
    pub first_row: usize,
    pub first_col: usize,
    pub rows: usize,
    pub cols: usize,
    pub overscan: usize,
}

A scroll viewport in cell coordinates, with a render margin.

Fields

first_row: usize

first_col: usize

rows: usize

cols: usize

overscan: usize

Extra rows/cols rendered beyond the visible edge, to absorb scroll jitter.

Implementations

impl Viewport

pub fn visible_range(&self) -> CellRange

The range of cells actually visible.

pub fn render_range(&self) -> CellRange

The range to render, including overscan.

pub fn active_cell(&self) -> CellRef

The cell holding keyboard focus.

impl Viewport

pub fn js_new( first_row: usize, first_col: usize, rows: usize, cols: usize, overscan: usize, ) -> Viewport

pub fn js_visible_range(&self) -> Vec<u32>

pub fn js_render_range(&self) -> Vec<u32>

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Viewport

impl Debug for Viewport

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Viewport

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Viewport> for JsValue

fn from(value: Viewport) -> Self

Converts to this type from the input type.

impl FromWasmAbi for Viewport

type Abi = u32

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: u32) -> Self

Recover a Self from Self::Abi.

impl IntoWasmAbi for Viewport

type Abi = u32

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> u32

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl LongRefFromWasmAbi for Viewport

type Abi = u32

Same as RefFromWasmAbi::Abi

type Anchor = RcRef<Viewport>

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for Viewport

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl OptionIntoWasmAbi for Viewport

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl RefFromWasmAbi for Viewport

type Abi = u32

The Wasm ABI type references to Self are recovered from.

type Anchor = RcRef<Viewport>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl RefMutFromWasmAbi for Viewport

type Abi = u32

Same as RefFromWasmAbi::Abi

type Anchor = RcRefMut<Viewport>

Same as RefFromWasmAbi::Anchor

unsafe fn ref_mut_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl Serialize for Viewport

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl SupportsConstructor for Viewport

impl SupportsInstanceProperty for Viewport

impl SupportsStaticProperty for Viewport

impl TryFromJsValue for Viewport

fn try_from_js_value(value: JsValue) -> Result<Self, JsValue>

Performs the conversion.

fn try_from_js_value_ref(value: &JsValue) -> Option<Self>

Performs the conversion.

impl VectorFromWasmAbi for Viewport

type Abi = <Box<[JsValue]> as FromWasmAbi>::Abi

unsafe fn vector_from_abi(js: Self::Abi) -> Box<[Viewport]>

impl VectorIntoWasmAbi for Viewport

type Abi = <Box<[JsValue]> as IntoWasmAbi>::Abi

fn vector_into_abi(vector: Box<[Viewport]>) -> Self::Abi

impl WasmDescribe for Viewport

fn describe()

impl WasmDescribeVector for Viewport

fn describe_vector()