import type { Shape } from './graphics.ts';
import type { BoxLengths, Length } from './sizes.ts';
import type { Text, TextProps, TextSpan } from './text.ts';
export type Block = TextBlock | ImageBlock | ColumnsBlock | RowsBlock | EmptyBlock;
/**
 * A block that contains text.
 */
export type TextBlock = {
    /**
     * Text to display in this block. Nested text spans can be used to
     * apply different text properties to different parts of the text.
     */
    text: string | TextSpan | (string | TextSpan)[] | Text;
    /**
     * Controls whether a page break may occur inside the block.
     * - `auto` (default): Insert a page break when needed.
     * - `avoid`: Do not insert a page break inside this block if it can be avoided.
     */
    breakInside?: 'auto' | 'avoid';
} & TextProps & BlockProps;
/**
 * Creates a text block. The text can contain nested text spans to apply
 * different text properties to different parts of the text. Use
 * `span()` to create text spans.
 *
 * @param text The text to display in this block.
 * @param props Optional properties for the block.
 */
export declare function text(text: string | TextSpan | (string | TextSpan)[], props?: Omit<TextBlock, 'text'>): TextBlock;
/**
 * A block that contains an image.
 */
export type ImageBlock = {
    /**
     * The name of an image to display in this block. If the given image
     * name has been registered with the global `images` property, the
     * registered image will be used. Otherwise, the image name is
     * interpreted as a file name and the image is loaded from the file
     * system. Relative paths are resolved relative to the current working
     * directory.
     *
     * When any of the properties `width` and `height` are specified, the
     * image will be scaled proportionally to be contained in the given
     * bounds. When neither `width` nor `height` is given, the image is
     * not scaled unless it exceeds the maximum available width. In this
     * case, it is scaled down to fit onto the page.
     */
    image: string;
    /**
     * Align the image in this block. By default, it is center-aligned.
     */
    imageAlign?: Alignment;
} & BlockProps;
/**
 * Creates a block that contains an image.
 *
 * @param image The URL of the image to display in this block.
 * @param props Optional properties for the block.
 */
export declare function image(image: string, props?: Omit<ImageBlock, 'image'>): ImageBlock;
/**
 * A block that contains other blocks arranged horizontally.
 */
export type ColumnsBlock = {
    /**
     * Content blocks to arrange horizontally.
     */
    columns: Block[];
} & TextProps & BlockProps;
/**
 * Creates a block that contains other blocks arranged horizontally.
 *
 * @param columns Content blocks to arrange horizontally.
 * @param props Optional properties for the block.
 */
export declare function columns(columns: Block[], props?: Omit<ColumnsBlock, 'columns'>): ColumnsBlock;
/**
 * A block that contains other blocks arranged vertically.
 */
export type RowsBlock = {
    /**
     * Content blocks to arrange vertically.
     */
    rows: Block[];
    /**
     * Controls whether a page break may occur inside the block.
     * - `auto` (default): Insert a page break when needed.
     * - `avoid`: Do not insert a page break inside this block if it can be avoided.
     */
    breakInside?: 'auto' | 'avoid';
    /**
     * Allows to insert an extra block after a page break.
     */
    insertAfterBreak?: Block | (() => Block);
} & TextProps & BlockProps;
/**
 * Creates a block that contains other blocks arranged vertically.
 *
 * @param rows Content blocks to arrange vertically.
 * @param props Optional properties for the block.
 */
export declare function rows(rows: Block[], props?: Omit<RowsBlock, 'rows'>): RowsBlock;
/**
 * A block that doesn't contain any content. It can be used to include
 * graphics.
 */
export type EmptyBlock = BlockProps;
/**
 * Properties that can be applied to a block.
 */
export type BlockProps = {
    /**
     * Space to leave between the content and the edges of the block.
     */
    padding?: Length | BoxLengths;
    /**
     * Space to surround the block.
     * The `top` and `bottom` margins of adjacent blocks are collapsed into a single margin
     * whose size is the maximum of the two margins. Column margins don't collapse.
     */
    margin?: Length | BoxLengths;
    /**
     * The width of the block. If this property is set to `auto`, the
     * block will use the width of the widest element in the block. In
     * this case, all children that don't have a fixed width will inherit
     * the `auto` width. If this property is not set, the block uses the
     * available width.
     */
    width?: Length | 'auto';
    /**
     * The height of the block. If this property is not set, the block
     * uses the height of its content.
     */
    height?: Length;
    /**
     * Align texts included in this block.
     * Supported values are `left`, `right` and `center`. By default, texts are left-aligned.
     */
    textAlign?: Alignment;
    /**
     * Aligns this block vertically within a columns block.
     */
    verticalAlign?: 'top' | 'middle' | 'bottom';
    /**
     * An optional *unique* id for the element. When an `id` is specified, an anchor with this id
     * will be included in the PDF document that can be used to refer to this element using the text
     * property `link`.
     */
    id?: string;
    /**
     * Graphic elements to draw in the area covered by the block.
     * The coordinate system for graphics shapes starts at the top left corner of the block.
     * A function can be passed to take the final size of the block into account.
     */
    graphics?: Shape[] | ((info: BlockInfo) => Shape[]);
    /**
     * Controls whether a page break may occur before the block.
     * - `auto` (default): Insert a page break when needed.
     * - `always`: Always insert a page break before this block.
     * - `avoid`: Do not insert a page break before this block if it can be avoided.
     */
    breakBefore?: 'auto' | 'always' | 'avoid';
    /**
     * Controls whether a page break may occur after the block.
     * - `auto` (default): Insert a page break when needed.
     * - `always`: Always insert a page break after this block.
     * - `avoid`: Do not insert a page break after this block if it can be avoided.
     */
    breakAfter?: 'auto' | 'always' | 'avoid';
};
/**
 * Information about the current block, provided to functions that
 * create graphics in the block area.
 */
export type BlockInfo = {
    /**
     * The width of the block in pt.
     */
    readonly width: number;
    /**
     * The height of the block in pt.
     */
    readonly height: number;
    /**
     * The padding of the block, all values in pt.
     */
    readonly padding: {
        left: number;
        right: number;
        top: number;
        bottom: number;
    };
};
export type Alignment = 'left' | 'right' | 'center';