Struct FloatContext 

pub struct FloatContext { /* private fields */ }

Tracks placed floats and provides exclusion zone queries.

FloatContext maintains separate lists of left and right floats and computes available space for content that flows around them.

Implementations

impl FloatContext

pub fn new(containing_width: f32) -> Self

Create a new float context for a containing block.

Arguments

• containing_width - The width of the containing block in pixels.

pub fn place_float( &mut self, fragment: Fragment, float_type: Float, cursor_y: f32, ) -> Fragment

Place a float left or right, below any existing floats that would overlap.

Arguments

• fragment - The fragment to float (will be mutated with position).
• float_type - Whether to float left or right.
• cursor_y - The vertical position of the generating box (float cannot be placed above this).

Returns

The fragment with its position field updated to the final placement.

Algorithm (per CSS 2.1 §9.5.1)

1. Float cannot be placed above cursor_y (the top of its generating box).
2. Float cannot be placed above any previously placed float.
3. Left float is placed as far left as possible, right float as far right as possible.
4. If float doesn’t fit horizontally at current y, move down until it fits.

pub fn available_width_at(&self, y: f32, height: f32) -> (f32, f32)

Get available width at a vertical position accounting for float exclusions.

Arguments

• y - Vertical position to query.
• height - Height of the content being placed (to check overlap).

Returns

A tuple of (left_offset, available_width):

• left_offset: The x-coordinate where content can start.
• available_width: The width available for content.

pub fn clear(&self, clear: Clear) -> f32

Get the y position that clears floats according to the clear property.

Arguments

• clear - The clear value (Left, Right, Both, or None).

Returns

The y position below the relevant floats, or 0.0 for Clear::None.

pub fn clear_all(&self) -> f32

Get the y position below all floats (both left and right).

Returns

The maximum bottom edge of all floats, or 0.0 if no floats exist.

Trait Implementations

impl Clone for FloatContext

fn clone(&self) -> FloatContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FloatContext

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

Formats the value using the given formatter.