Struct WritingModeContext 

pub struct WritingModeContext {
    pub writing_mode: LayoutWritingMode,
    pub direction: StyleDirection,
    pub text_orientation: StyleTextOrientation,
}

Captures the resolved writing mode context for a node.

This struct bundles together all the CSS properties that affect how logical directions (inline/block) map to physical directions (x/y). Spec agents should use this struct to implement writing-mode-aware layout.

CSS Writing Modes Level 4

• writing-mode determines the block flow direction and inline base direction
• direction determines the inline base direction (ltr or rtl)
• text-orientation determines glyph orientation in vertical writing modes

Fields

writing_mode: LayoutWritingMode

direction: StyleDirection

text_orientation: StyleTextOrientation

Implementations

impl WritingModeContext

pub fn new( writing_mode: LayoutWritingMode, direction: StyleDirection, text_orientation: StyleTextOrientation, ) -> Self

Constructs a WritingModeContext, applying spec-mandated overrides.

pub fn used_direction(&self) -> StyleDirection

Returns the used value of direction, accounting for text-orientation: upright which forces direction to ltr in vertical writing modes per CSS Writing Modes 4 §5.1.

pub fn is_horizontal(&self) -> bool

Returns true if the writing mode is horizontal (HorizontalTb).

When true, the inline axis is horizontal and the block axis is vertical.

pub fn inline_size_is_width(&self) -> bool

Returns true if the inline size corresponds to the physical width.

In horizontal writing modes, inline size = width. In vertical writing modes, inline size = height.

pub fn block_size_is_height(&self) -> bool

Returns true if the block size corresponds to the physical height.

In horizontal writing modes, block size = height. In vertical writing modes, block size = width.

pub fn is_inline_reversed(&self) -> bool

Returns true if the inline direction is reversed (RTL in horizontal, or bottom-to-top in certain vertical modes).

Trait Implementations

impl Clone for WritingModeContext

fn clone(&self) -> WritingModeContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WritingModeContext

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

Formats the value using the given formatter.

impl Default for WritingModeContext

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for WritingModeContext

fn eq(&self, other: &WritingModeContext) -> 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 Copy for WritingModeContext

impl Eq for WritingModeContext

impl StructuralPartialEq for WritingModeContext