import { PptxElement } from 'pptx-viewer-core';
/** Toggleable boolean text-style flags. */
export type TextFlag = 'bold' | 'italic' | 'underline';
/** Flip a boolean text flag (bold / italic / underline). */
export declare function toggleTextFlagPatch(el: PptxElement, flag: TextFlag): Partial<PptxElement>;
/** Set an absolute font size (clamped to a sane range). */
export declare function setFontSizePatch(el: PptxElement, size: number): Partial<PptxElement>;
/** Nudge the font size by `delta` points (clamped). */
export declare function adjustFontSizePatch(el: PptxElement, delta: number): Partial<PptxElement>;
/** Set the text (foreground) colour. */
export declare function setTextColorPatch(el: PptxElement, color: string): Partial<PptxElement>;
/** Read the text highlight colour (empty string when unset). */
export declare function highlightColorOf(el: PptxElement): string;
/** Set the text highlight colour, preserving other text-style fields. */
export declare function setHighlightColorPatch(el: PptxElement, color: string): Partial<PptxElement>;
/** Set the shape fill colour. */
export declare function setFillColorPatch(el: PptxElement, color: string): Partial<PptxElement>;
/**
 * Set the shape fill colour AND force `fillMode` back to `'solid'`. Picking a
 * flat colour swatch implies solid fill, so it also clears any active
 * gradient (the renderer prefers `fillMode === 'gradient'` over `fillColor`
 * when both are present); the patch itself comes from the shared
 * `shapeFillChange` decision function (React/Vue/Angular/vanilla parity).
 */
export declare function setSolidFillPatch(el: PptxElement, color: string): Partial<PptxElement>;
/** Set the shape stroke (outline) colour, via the shared decision function. */
export declare function setStrokeColorPatch(el: PptxElement, color: string): Partial<PptxElement>;
/** Read the shape stroke width (defaults to 1 when unset). */
export declare function strokeWidthOf(el: PptxElement): number;
/** Set the shape stroke width (px), preserving other shape-style fields. */
export declare function setStrokeWidthPatch(el: PptxElement, width: number): Partial<PptxElement>;
/** Read the shape fill opacity (0..1, defaults to fully opaque when unset). */
export declare function fillOpacityOf(el: PptxElement): number;
/** Set the shape fill opacity (0..1), preserving other shape-style fields. */
export declare function setFillOpacityPatch(el: PptxElement, opacity: number): Partial<PptxElement>;
/** Read the shape stroke opacity (0..1, defaults to fully opaque when unset). */
export declare function strokeOpacityOf(el: PptxElement): number;
/** Set the shape stroke opacity (0..1), preserving other shape-style fields. */
export declare function setStrokeOpacityPatch(el: PptxElement, opacity: number): Partial<PptxElement>;
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