/**
 * Layout — every dimension the board uses, and the rules that bind them.
 *
 * Rules (enforced by render.ts; see LAYOUT.md for the prose):
 *  R1  Nothing draws outside its box. Text that does not fit is cut with an ellipsis, never overflowed.
 *  R2  A clip's width is measured from its content; a column is as wide as its widest clip.
 *  R3  Columns are handoffs. A clip sits in the column of the last handoff it takes.
 *  R4  Tracks have one height. Two clips in one track-column stack with a fixed offset, never overlap.
 *  R5  Marks sit in one row above the clip's right edge; the pin is last and outermost.
 *  R6  Notes never sit on the board. Pins on the board, notes in the gutter, in pin order.
 *  R7  Wires leave from the right port, arrive at the left port; loops pass underneath; same-column handoffs are vertical.
 *  R8  Gutters, margins and paddings come from this file, never from the renderer.
 */
export declare const T: {
    readonly pageMargin: 40;
    readonly labelColumn: 210;
    readonly boardInset: 14;
    readonly columnGutter: 36;
    readonly columnMinWidth: 120;
    readonly headerHeight: 40;
    readonly trackHeight: 64;
    readonly trackGap: 8;
    readonly trackNameX: 24;
    readonly trackGlyph: 16;
    readonly clipPadX: 12;
    readonly clipPadTop: 10;
    readonly clipPadTopSlim: 17;
    readonly clipHeight: 44;
    readonly clipHeightSlim: 30;
    readonly clipRadius: 3;
    readonly clipStackDx: 14;
    readonly clipStackDy: 6;
    readonly compositeShadow: 4;
    readonly triggerGlyph: 12;
    readonly kindGlyph: 14;
    readonly glyphGap: 4;
    readonly portRadius: 3;
    readonly notchDepth: 7;
    readonly notchDepthSingle: 9;
    readonly gateReserve: 10;
    readonly markSize: 14;
    readonly markStep: 17;
    readonly markRise: 9;
    readonly pinRadius: 7;
    readonly titleSize: 12.5;
    readonly metaSize: 10.5;
    readonly artifactSize: 10.5;
    readonly noteSize: 10.5;
    readonly trackNameSize: 12.5;
    readonly trackMetaSize: 11;
    readonly metaMaxChars: 44;
    readonly em: 0.56;
    readonly wireLoopDrop: 40;
    readonly gutterTop: 28;
    readonly gutterLine: 18;
    readonly gutterWrap: 120;
    readonly titleWeight: 600;
    readonly metaWeight: 400;
};
/** Rendered width of a string at a font size and weight, from the embedded font's own metrics. */
export declare function textWidth(s: string, size: number, weight?: number): number;
/** Cut a string so it fits in `px` at `size`, with an ellipsis, breaking on a word if one is near. (R1) */
export declare function fit(s: string, px: number, size: number, weight?: number): string;
/** Wrap a note into lines of at most `chars`. (R6) */
export declare function wrap(s: string, chars?: 120): string[];