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
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
Ltr

A strong left-to-right direction

Rtl

A strong right-to-left direction

TtbLtr

Deprecated value; treated the same as Rtl.

TtbRtl

Deprecated value; treated the same as Ltr

WeakLtr

A weak left-to-right direction

WeakRtl

A weak right-to-left direction

Neutral

No direction specified

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