Struct BufferFlags 

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

Flags for buffers.

Implementations

impl BufferFlags

pub const BEGINNING_OF_TEXT: BufferFlags

Indicates that special handling of the beginning of text paragraph can be applied to this buffer. Should usually be set, unless you are passing to the buffer only part of the text without the full context.

pub const END_OF_TEXT: BufferFlags

Indicates that special handling of the end of text paragraph can be applied to this buffer, similar to BufferFlags::BEGINNING_OF_TEXT.

pub const PRESERVE_DEFAULT_IGNORABLES: BufferFlags

Indicates that characters with Default_Ignorable Unicode property should use the corresponding glyph from the font, instead of hiding them (done by replacing them with the space glyph and zeroing the advance width.) This flag takes precedence over BufferFlags::REMOVE_DEFAULT_IGNORABLES.

pub const REMOVE_DEFAULT_IGNORABLES: BufferFlags

Indicates that characters with Default_Ignorable Unicode property should be removed from glyph string instead of hiding them (done by replacing them with the space glyph and zeroing the advance width.) BufferFlags::PRESERVE_DEFAULT_IGNORABLES takes precedence over this flag.

pub const DO_NOT_INSERT_DOTTED_CIRCLE: BufferFlags

Indicates that a dotted circle should not be inserted in the rendering of incorrect character sequences (such as <0905 093E>).

pub const VERIFY: BufferFlags

Indicates that the shape() call and its variants should perform various verification processes on the results of the shaping operation on the buffer. If the verification fails, then either a buffer message is sent, if a message handler is installed on the buffer, or a message is written to standard error. In either case, the shaping result might be modified to show the failed output.

pub const PRODUCE_UNSAFE_TO_CONCAT: BufferFlags

Indicates that the UNSAFE_TO_CONCAT glyph-flag should be produced by the shaper. By default it will not be produced since it incurs a cost.

pub const PRODUCE_SAFE_TO_INSERT_TATWEEL: BufferFlags

Indicates that the SAFE_TO_INSERT_TATWEEL glyph-flag should be produced by the shaper. By default it will not be produced.

pub const DEFINED: BufferFlags

All currently defined flags

impl BufferFlags

pub const fn empty() -> BufferFlags

Get a flags value with all bits unset.

pub const fn all() -> BufferFlags

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

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

pub const fn from_bits(bits: u32) -> Option<BufferFlags>

Convert from a bits value.

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

pub const fn from_bits_truncate(bits: u32) -> BufferFlags

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> BufferFlags

Convert from a bits value exactly.

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

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: BufferFlags) -> bool

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

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

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

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

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

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

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: BufferFlags)

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

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

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

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

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

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

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

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

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: BufferFlags) -> BufferFlags

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

pub const fn complement(self) -> BufferFlags

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

impl BufferFlags

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

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<BufferFlags>

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.

Trait Implementations

impl Binary for BufferFlags

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

Formats the value using the given formatter.

impl BitAnd for BufferFlags

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

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

type Output = BufferFlags

The resulting type after applying the & operator.

impl BitAndAssign for BufferFlags

fn bitand_assign(&mut self, other: BufferFlags)

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

impl BitOr for BufferFlags

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

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

type Output = BufferFlags

The resulting type after applying the | operator.

impl BitOrAssign for BufferFlags

fn bitor_assign(&mut self, other: BufferFlags)

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

impl BitXor for BufferFlags

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

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

type Output = BufferFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for BufferFlags

fn bitxor_assign(&mut self, other: BufferFlags)

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

impl Clone for BufferFlags

fn clone(&self) -> BufferFlags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BufferFlags

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

Formats the value using the given formatter.

impl Default for BufferFlags

fn default() -> BufferFlags

Returns the “default value” for a type.

impl Extend<BufferFlags> for BufferFlags

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

where T: IntoIterator<Item = BufferFlags>,

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 BufferFlags

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

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> BufferFlags

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 known_bits(&self) -> Self::Bits

Get the known bits from a flags value.

fn unknown_bits(&self) -> Self::Bits

Get the unknown bits from a flags value.

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 iter_defined_names() -> IterDefinedNames<Self>

Yield a set of all named flags defined by [Self::FLAGS].

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 clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

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<BufferFlags> for BufferFlags

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

where T: IntoIterator<Item = BufferFlags>,

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

impl IntoIterator for BufferFlags

type Item = BufferFlags

The type of the elements being iterated over.

type IntoIter = Iter<BufferFlags>

Which kind of iterator are we turning this into?

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

Creates an iterator from a value.

impl LowerHex for BufferFlags

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

Formats the value using the given formatter.

impl Not for BufferFlags

fn not(self) -> BufferFlags

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

type Output = BufferFlags

The resulting type after applying the ! operator.

impl Octal for BufferFlags

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

Formats the value using the given formatter.

impl Sub for BufferFlags

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

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 = BufferFlags

The resulting type after applying the - operator.

impl SubAssign for BufferFlags

fn sub_assign(&mut self, other: BufferFlags)

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 UpperHex for BufferFlags

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

Formats the value using the given formatter.

impl Copy for BufferFlags