import { FabricObject } from 'fabric';
import { SVGElementNode } from '../types';
/**
 * Represents the bounding box of an SVG element
 */
export interface ElementBounds {
    x: number;
    y: number;
    width: number;
    height: number;
}
/**
 * Loads all fabric.js objects from an SVG string and returns them indexed by ID
 */
export declare function loadAllFabricObjects(svgString: string): Promise<Record<string, FabricObject>>;
/**
 * Context for height update operations
 */
export interface HeightUpdateContext {
    element: SVGElementNode;
    oldBounds: ElementBounds;
    newBounds: ElementBounds;
    deltaHeight: number;
}
/**
 * Calculate element bounds using fabric.js (async)
 * This version creates a root SVG if none provided
 * Handles root <svg> elements specially by returning their width/height attributes
 */
export declare function calculateSingleElementBounds(element: SVGElementNode, svgRoot?: SVGElementNode): Promise<ElementBounds>;
/**
 * Calculate bounds for an element within the context of the full SVG tree
 * This is the primary bounds calculation function
 * Throws errors for invalid combinations of SVG elements
 */
export declare function calculateElementBounds(element: SVGElementNode, svgRoot: SVGElementNode): Promise<ElementBounds>;
/**
 * Synchronous fallback for text bounds using line extraction
 * Used when we need immediate bounds for text layout calculations
 */
export declare function calculateTextBoundsSync(element: SVGElementNode): ElementBounds;
/**
 * Checks if an element contains (overlaps with) the changed element
 *
 * An element "contains" the changed element if their bounds intersect
 * for at least 90% of the changed element's height.
 */
export declare function containsChangedElement(element: SVGElementNode, changedElementBounds: ElementBounds, fabricObjectsById: Record<string, FabricObject>): boolean;
/**
 * Updates heights of siblings that contain the changed element
 * Falls back to full-height logic if no containing elements are found
 */
export declare function updateContainingSiblings(containerElement: SVGElementNode, changedElementBounds: ElementBounds, deltaHeight: number, svgRoot: SVGElementNode, fabricObjectsById: Record<string, FabricObject>, processedElements?: Set<SVGElementNode>, constrainedWidth?: number, changedElement?: SVGElementNode): Promise<void>;
/**
 * Updates filter widths for constrained text elements
 * This should be called whenever text has constrained width, regardless of height changes
 */
export declare function updateFilterWidthsForConstrainedText(svgTree: SVGElementNode, textElement: SVGElementNode, constrainedWidth: number): Promise<void>;
/**
 * Recursively updates element heights from a changed element up to the SVG root
 */
export declare function updateElementAndAncestors(svgTree: SVGElementNode, changedElement: SVGElementNode, changedElementOriginalBounds: ElementBounds, deltaHeight: number, fabricObjectsById: Record<string, FabricObject>, constrainedWidth?: number): Promise<void>;
/**
 * Main function to handle height updates from text expansion
 * This replaces the global updateBackgroundElements approach
 */
export declare function handleTextHeightChange(svgTree: SVGElementNode, textElement: SVGElementNode, deltaHeight: number, originalBounds: ElementBounds, constrainedWidth?: number): Promise<void>;