Struct HitTestResult 

pub struct HitTestResult {
    pub position: usize,
    pub affinity: CursorAffinity,
    pub block_id: usize,
    pub offset_in_block: usize,
    pub region: HitRegion,
    pub tooltip: Option<String>,
    pub table_id: Option<usize>,
}

Result of crate::DocumentFlow::hit_test - maps a screen-space point to a document position.

Fields

position: usize

Absolute character position in the document.

affinity: CursorAffinity

Which side of a soft-wrap boundary the click landed on. When the matched line’s Y range contained the click and position equals that line’s char_range.start AND a preceding line in the same block ends at the same position, the click is on the upstream side of the boundary → Upstream. Otherwise Downstream. At non-wrap positions the value is Downstream (default) and does not affect anything.

block_id: usize

Which block (paragraph) was hit, identified by stable block ID.

offset_in_block: usize

Character offset within the block (0 = start of block).

region: HitRegion

What region of the layout was hit.

tooltip: Option<String>

Tooltip text if the hit position has a tooltip. None otherwise.

table_id: Option<usize>

When non-None, the hit position is inside a table cell. Identifies the table by its stable table ID. None for hits on top-level blocks, frame blocks, or outside any table.