Enum pango::Direction [−][src]
#[non_exhaustive] pub enum Direction { Ltr, Rtl, TtbLtr, TtbRtl, WeakLtr, WeakRtl, Neutral, // some variants omitted }
Expand description
The Direction
type represents a direction in the
Unicode bidirectional algorithm; not every value in this
enumeration makes sense for every usage of Direction
;
for example, the return value of unichar_direction()
and find_base_dir()
cannot be WeakLtr
or WeakRtl
, since every character is either
neutral or has a strong direction; on the other hand
Neutral
doesn’t make sense to pass
to itemize_with_base_dir()
.
The TtbLtr
, TtbRtl
values come from an earlier interpretation of this
enumeration as the writing direction of a block of
text and are no longer used; See Gravity
for how
vertical text is handled in Pango.
If you are interested in text direction, you should really use fribidi directly. PangoDirection is only retained because it is used in some public apis.
Variants (Non-exhaustive)
This enum is marked as non-exhaustive
A strong left-to-right direction
A strong right-to-left direction
Deprecated value; treated the
same as Rtl
.
Deprecated value; treated the
same as Ltr
A weak left-to-right direction
A weak right-to-left direction
No direction specified
Trait Implementations
type Checker = GenericValueTypeChecker<Self>
type Checker = GenericValueTypeChecker<Self>
Value type checker.
Get the contained value from a Value
. Read more
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Returns the type identifier of Self
.
Auto Trait Implementations
impl RefUnwindSafe for Direction
impl UnwindSafe for Direction
Blanket Implementations
Mutably borrows from an owned value. Read more
Returns a SendValue
clone of self
.