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.

Alignment this line was actually laid out to, set during layout: the component's setting after every per-range override, the paragraph-last rule and the justification fallback have had their say. What a pass reads to place something on the edge the text was pinned to; never Justify on a line that ended up unjustified.

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

Baseline of the line in pixels down from the top of the layout area, the space of y. Valid only while HasLineGeometry holds.

Top of the line's hit band, at the primary font's ascender above baseline. Bands of consecutive lines share edges, so every vertical position over the text belongs to exactly one line. Valid only while HasLineGeometry holds.

Bottom of the line's hit band: the next line's top, or for the last line the primary font's descender below baseline. Valid only while HasLineGeometry holds.

Left edge of the box the line is aligned in, in pixels from the left of the layout area; startMargin indents from it. Valid only while HasLineGeometry holds.

Width of the box the line is aligned in, in pixels; unbounded text reports FloatMax. Valid only while HasLineGeometry 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.