Struct pango::Coverage

#[repr(transparent)]
pub struct Coverage { /* private fields */ }

A Coverage structure is a map from Unicode characters to CoverageLevel values.

It is often necessary in Pango to determine if a particular font can represent a particular character, and also how well it can represent that character. The Coverage is a data structure that is used to represent that information. It is an opaque structure with no public fields.

Implementations

impl Coverage

pub fn new() -> Self

Create a new Coverage

Returns

the newly allocated Coverage, initialized to CoverageLevel::None with a reference count of one, which should be freed with Pango::Coverage::unref().

pub fn copy(&self) -> Option<Coverage>

pub fn get(&self, index_: i32) -> CoverageLevel

Determine whether a particular index is covered by @self.

index_

the index to check

Returns

the coverage level of @self for character @index_.

pub fn max(&self, other: &Coverage)

Set the coverage for each index in @self to be the max (better) value of the current coverage for the index and the coverage for the corresponding index in @other.

Deprecated since 1.44

This function does nothing

other

another Coverage

pub fn set(&self, index_: i32, level: CoverageLevel)

Modify a particular index within @self

index_

the index to modify

level

the new level for @index_

pub fn to_bytes(&self) -> Vec<u8>

Convert a Coverage structure into a flat binary format.

Deprecated since 1.44

This returns None

Returns

bytes

location to store result (must be freed with g_free())

pub fn from_bytes(bytes: &[u8]) -> Option<Coverage>

Convert data generated from to_bytes() back to a Coverage.

Deprecated since 1.44

This returns None

bytes

binary data representing a Coverage

Returns

a newly allocated Coverage

Trait Implementations

impl Clone for Coverage

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Coverage

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

Formats the value using the given formatter.

impl Default for Coverage

fn default() -> Self

Returns the “default value” for a type.

impl Display for Coverage

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

Formats the value using the given formatter.

impl HasParamSpec for Coverage

type ParamSpec = ParamSpecObject

type SetValue = Coverage

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, Coverage>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for Coverage

fn hash<H>(&self, state: &mut H)where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Coverage

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl ParentClassIs for Coverage

type Parent = Object

impl<OT: ObjectType> PartialEq<OT> for Coverage

fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for Coverage

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for Coverage

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for Coverage