Enum ColumnMode 

pub enum ColumnMode {
    Auto,
    Two,
    Single,
}

Build a StructuredPage from reading-order spans + page dimensions. Column-detection mode for build_structured_page_with_mode (Fix 3). The geometric column split is heuristic — ISO 32000-1:2008 defines no reading order for untagged content (§14.8.2.3) — so a consumer who knows their layout may override the heuristic. This override applies only to the geometric (Tier-3) path; it never overrides a trustworthy structure tree.

Variants

Auto

Detect two-column bodies heuristically (the default).

Two

Force a two-column split: use the detected gutter, or the page midpoint when no clean gutter is found. For consumers who know the page is two-column (e.g. reference editions whose short, ragged lines the heuristic is conservative about).

Single

Treat the whole page as a single column — suppress all column detection (column_index stays None).

Trait Implementations

impl Clone for ColumnMode

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ColumnMode

impl Debug for ColumnMode

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

Formats the value using the given formatter.

impl Default for ColumnMode

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ColumnMode

impl PartialEq for ColumnMode

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ColumnMode