Struct LockState

pub struct LockState(/* private fields */);

A bit field of lock states which are currently active.

Lock state reports whether the lock is active for the keys which have a lock state (need to be pressed once to activate, and one more time to deactivate). A set bit denotes active lock state.

For example, when Caps Lock is active, i.e. pressing ‘a’ produces the effect of ‘A’ appearing on the screen, the CAPS_LOCK bit will be active.

The bit values in LockState are chosen to correspond to the values in Modifiers, to the extent that this is doable in the long run.

Implementations

impl LockState

pub const CAPS_LOCK: LockState

Applies when the CAPS_LOCK modifier is locked.

Users should bear in mind that the effect of CAPS_LOCK is limited to alphabetic keys (not even alphanumerics) mainly.

For example, pressing a on a US QWERTY keyboard while CAPS_LOCK state is locked results in the key meaning A, just as if the Shift modifier was used. However, pressing [ when CAPS_LOCK is locked gives [, even though Shift+[ gives {.

The position of alphabetic keys may vary depending on the keymap in current use too.

pub const NUM_LOCK: LockState

Applies when the NUM_LOCK modifier is locked.

pub const SCROLL_LOCK: LockState

Applies when the SCROLL_LOCK modifier is locked.

pub const FUNCTION_LOCK: LockState

Applies when the FUNCTION modifier is locked.

pub const SYMBOL_LOCK: LockState

Applies when the SYMBOL modifier is locked.

impl LockState

pub const fn empty() -> LockState

Get a flags value with all bits unset.

pub const fn all() -> LockState

Get a flags value with all known bits set.

pub const fn bits(&self) -> u64

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u64) -> Option<LockState>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u64) -> LockState

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u64) -> LockState

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<LockState>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: LockState) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

pub const fn contains(&self, other: LockState) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

pub fn insert(&mut self, other: LockState)

The bitwise or (|) of the bits in two flags values.

pub fn remove(&mut self, other: LockState)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: LockState)

The bitwise exclusive-or (^) of the bits in two flags values.

pub fn set(&mut self, other: LockState, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: LockState) -> LockState

The bitwise and (&) of the bits in two flags values.

pub const fn union(self, other: LockState) -> LockState

The bitwise or (|) of the bits in two flags values.

pub const fn difference(self, other: LockState) -> LockState

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: LockState) -> LockState

The bitwise exclusive-or (^) of the bits in two flags values.

pub const fn complement(self) -> LockState

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl LockState

pub const fn iter(&self) -> Iter<LockState>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<LockState>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

impl LockState

pub fn from_bits_allow_unknown(bits: u64) -> LockState

pub fn has_unknown_bits(&self) -> bool

pub fn get_unknown_bits(&self) -> u64

Trait Implementations

impl Binary for LockState

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

Formats the value using the given formatter.

impl BitAnd for LockState

fn bitand(self, other: LockState) -> LockState

The bitwise and (&) of the bits in two flags values.

type Output = LockState

The resulting type after applying the & operator.

impl BitAndAssign for LockState

fn bitand_assign(&mut self, other: LockState)

The bitwise and (&) of the bits in two flags values.

impl BitOr for LockState

fn bitor(self, other: LockState) -> LockState

The bitwise or (|) of the bits in two flags values.

type Output = LockState

The resulting type after applying the | operator.

impl BitOrAssign for LockState

fn bitor_assign(&mut self, other: LockState)

The bitwise or (|) of the bits in two flags values.

impl BitXor for LockState

fn bitxor(self, other: LockState) -> LockState

The bitwise exclusive-or (^) of the bits in two flags values.

type Output = LockState

The resulting type after applying the ^ operator.

impl BitXorAssign for LockState

fn bitxor_assign(&mut self, other: LockState)

The bitwise exclusive-or (^) of the bits in two flags values.

impl Clone for LockState

fn clone(&self) -> LockState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LockState

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

Formats the value using the given formatter.

impl<D> Decode<LockState, D> for LockState

where D: ResourceDialect,

fn new_empty() -> LockState

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Decodes an object of type T from the decoder’s buffers into self.

impl Default for LockState

fn default() -> LockState

Returns the “default value” for a type.

impl<D> Encode<LockState, D> for LockState

where D: ResourceDialect,

unsafe fn encode( self, encoder: &mut Encoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl Extend<LockState> for LockState

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = LockState>,

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for LockState

const FLAGS: &'static [Flag<LockState>]

The set of defined flags.

type Bits = u64

The underlying bits type.

fn bits(&self) -> u64

Get the underlying bits value.

fn from_bits_retain(bits: u64) -> LockState

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in two flags values.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call [Flags::insert] when value is true or [Flags::remove] when value is false.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl FromIterator<LockState> for LockState

fn from_iter<T>(iterator: T) -> LockState

where T: IntoIterator<Item = LockState>,

The bitwise or (|) of the bits in each flags value.

impl Hash for LockState

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 IntoIterator for LockState

type Item = LockState

The type of the elements being iterated over.

type IntoIter = Iter<LockState>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <LockState as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for LockState

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

Formats the value using the given formatter.

impl Not for LockState

fn not(self) -> LockState

The bitwise negation (!) of the bits in a flags value, truncating the result.

type Output = LockState

The resulting type after applying the ! operator.

impl Octal for LockState

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

Formats the value using the given formatter.

impl Ord for LockState

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for LockState

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for LockState

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Sub for LockState

fn sub(self, other: LockState) -> LockState

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = LockState

The resulting type after applying the - operator.

impl SubAssign for LockState

fn sub_assign(&mut self, other: LockState)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl TypeMarker for LockState

type Owned = LockState

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl UpperHex for LockState

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

Formats the value using the given formatter.

impl ValueTypeMarker for LockState

type Borrowed<'a> = LockState

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases:

fn borrow( value: &<LockState as TypeMarker>::Owned, ) -> <LockState as ValueTypeMarker>::Borrowed<'_>

Cheaply converts from &Self::Owned to Self::Borrowed.

impl Copy for LockState

impl Eq for LockState

impl StructuralPartialEq for LockState