Struct LayoutEngine 

pub struct LayoutEngine { /* private fields */ }

Layout engine for converting tokens to paginated content

Implementations

impl LayoutEngine

pub const DISPLAY_WIDTH: f32 = 480.0

Default display width in pixels

pub const DISPLAY_HEIGHT: f32 = 800.0

Default display height in pixels

pub const DEFAULT_MARGIN: f32 = 32.0

Default side margins in pixels

pub const DEFAULT_TOP_MARGIN: f32 = 0.0

Top margin - minimal

pub const DEFAULT_HEADER_HEIGHT: f32 = 45.0

Header area for title (must match renderer HEADER_HEIGHT)

pub const DEFAULT_FOOTER_HEIGHT: f32 = 40.0

Footer area for progress (must match renderer FOOTER_HEIGHT)

pub fn new(page_width: f32, page_height: f32, line_height: f32) -> Self

Create a new layout engine

Arguments

• page_width - Available width for content (excluding margins)
• page_height - Available height for content (excluding header/footer)
• line_height - Height of each line in pixels

pub fn with_defaults() -> Self

Create layout engine with default display dimensions

Content area: 416x715 (accounting for margins, header, footer) Uses 10x20 font with 26px line height for comfortable reading

pub fn with_font_metrics(self, metrics: FontMetrics) -> Self

Set font metrics

pub fn with_margins(self, left: f32, top: f32) -> Self

Set margins

pub fn layout_tokens(&mut self, tokens: &[Token]) -> Vec<Page>

Convert tokens into laid-out pages

pub fn into_pages(self) -> Vec<Page>

Get the completed pages

pub fn current_page_number(&self) -> usize

Get current page number

pub fn total_pages(&self) -> usize

Get total pages created so far

pub fn measure_text(&self, text: &str, style: TextStyle) -> f32

Measure text width for given string and style