Module breadcrumb 

Breadcrumb widget — a horizontal path indicator with clickable ancestor segments and a chevron icon between them.

The trail takes the width it is given. When its segments do not fit, it truncates the middle: keeps the first segment, puts the Icon::MoreHorizontal glyph in place of the hidden ones, keeps the last two. A trail of 4 or fewer segments never truncates (the truncated form wouldn’t be shorter).

An optional root icon (Breadcrumb::root_icon) leads the first segment (a drive, Home). A trail that doubles as an editable path reports a click on its empty space through Breadcrumb::on_edit_requested, so the host can swap in a field.

Structs

Breadcrumb

segment_rects and visible_origin mirror the truncated cached_visible list (not the original segments) so the click hit-test matches what’s on screen.