Module wrap 

Line breaking and per-message layout.

Produces a LayoutCache for one message at one width: its total pixel height and the line boxes needed for hit-testing. This is where both layouts live: two columns, with the timestamp and nick gutter on the left and the body indented past it, and one, with the nick at the start of the body’s first line.

Measurement goes through TextMeasure, one call per run, never per character. xtext’s find_next_wrap (xtext.c:3685) measured character by character through a full Pango layout round trip each time; that is the single hottest thing in its append path and the reason a resize of a large buffer visibly hitches.

Structs

AvatarBox

A square avatar slot in the gutter, in row-local coordinates.

LayoutCache

What a laid-out message knows about itself.

LayoutGeneration

Identifies the conditions a LayoutCache was computed under.

LayoutParams

Geometry knobs, supplied by the view.

LineBox

One visual line within a message.

Enums

LineSource

What a LineBox draws text from.

Functions

estimate_height

Rough height for a row that has never been laid out.

is_muted

Whether a message draws in the muted secondary colour.

layout_message

Lay one message out.

spans_in

Spans of p clipped to range, for the view’s snapshot pass.