TextLine

True when the line's paragraph base direction is right-to-left (UAX #9 odd embedding level).

The codepoint range covered by this line.

Index of the first run in the ordered runs buffer for this line.

Number of runs in this line.

Index of the first positioned glyph belonging to this line (set during layout).

Number of positioned glyphs belonging to this line (set during layout).

Content width in font units (excluding trailing whitespace).

Measured line width in mesh-local pixels, set during layout.

Width of trailing whitespace excluded from width, in font units.

The base BiDi level of the paragraph containing this line.

Left margin for this line (e.g., for list indentation).

Vertical distance from this line's baseline to the next one's, set during layout; zero on the last line, which advances to nothing. Valid only while HasLineAdvances holds — a re-break clears it.

Inclusive prefix sum of advance over lines 0..this, set during layout, which lets a Y coordinate find its line by binary search rather than accumulation. Valid only while HasLineAdvances holds.

Extra leading reserved above this line for tall boundary content such as over-ruby; on the first line it reserves the block's top instead. Written through ReserveLineSpace from a line-height callback, largest wins.

Extra leading reserved below this line; on the last line it reserves the block's bottom instead. Written through ReserveLineSpace from a line-height callback, largest wins.

Signed adjustment to the gap between this line and the next — negative pulls them together, down to full overlap, and the gap never inverts. Unused on the last line, so block edges stay untouched. Written through AddLineGap from a line-height callback, requests summing.

True when this line was terminated by a UAX #14 mandatory break (CR / LF / NEL / LS / PS / etc.) — i.e. the next line starts a new paragraph for justification purposes.