/**
 * Editing helpers — unit conversion and SVG DOM utilities for interactive editing.
 *
 * These helpers let frontend developers work with familiar units (px, pt, degrees)
 * instead of OOXML's EMU / hundredths-of-a-point / 60000ths-of-a-degree.
 */
/** EMU per point (1 pt = 12700 EMU). */
export declare const EMU_PER_PT = 12700;
/** EMU per pixel at 96 DPI (914400 / 96 = 9525). */
export declare const EMU_PER_PX_96DPI = 9525;
/**
 * Convert pixels to EMU.
 * @param px - Pixel value
 * @param dpi - DPI (default 96)
 */
export declare function pxToEmu(px: number, dpi?: number): number;
/**
 * Convert EMU to pixels.
 * @param emu - EMU value
 * @param dpi - DPI (default 96)
 */
export declare function emuToPx(emu: number, dpi?: number): number;
/**
 * Convert points to OOXML hundredths-of-a-point.
 * @param pt - Point value (e.g. 18)
 * @returns Hundredths (e.g. 1800)
 */
export declare function ptToHundredths(pt: number): number;
/**
 * Convert OOXML hundredths-of-a-point to points.
 * @param val - Hundredths value (e.g. 1800)
 * @returns Points (e.g. 18)
 */
export declare function hundredthsToPt(val: number): number;
/**
 * Convert degrees to OOXML angle units (60000ths of a degree).
 * @param deg - Degrees (e.g. 90)
 * @returns OOXML angle (e.g. 5400000)
 */
export declare function degreesToOoxml(deg: number): number;
/**
 * Convert OOXML angle units to degrees.
 * @param val - OOXML angle (e.g. 5400000)
 * @returns Degrees (e.g. 90)
 */
export declare function ooxmlToDegrees(val: number): number;
/** Shape transform in EMU (as stored in data-ooxml-* attributes). */
export interface ShapeTransform {
    x: number;
    y: number;
    cx: number;
    cy: number;
    rot: number;
}
/**
 * Find a shape's `<g>` element by its shape index.
 * Looks for `data-ooxml-shape-idx="N"` in the SVG.
 */
export declare function findShapeElement(svg: SVGSVGElement, shapeIdx: number): SVGGElement | null;
/**
 * Read the OOXML transform from a shape's `<g>` element data attributes.
 * Returns EMU values.
 */
export declare function getShapeTransform(g: SVGGElement): ShapeTransform;
/**
 * Get all shape `<g>` elements in an SVG (direct children with data-ooxml-shape-idx).
 */
export declare function getAllShapes(svg: SVGSVGElement): SVGGElement[];
/**
 * Get the EMU-to-pixel scale factor from the SVG root's data attribute.
 */
export declare function getSlideScale(svg: SVGSVGElement): number;
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