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* @module Utils
*/
import * as MC from "@lisn/globals/minification-constants";
import * as MH from "@lisn/globals/minification-helpers";
import { Box, Dimension, Size } from "@lisn/globals/types";
import { waitForMeasureTime } from "@lisn/utils/dom-optimize";
import { createOverlay } from "@lisn/utils/overlays";
/**
* Returns the content box size of the given
* {@link https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserverEntry | ResizeObserverEntry}.
*
* @category Size measurements
*/
export const getEntryContentBox = (entry: ResizeObserverEntry): Size => {
const size = entry.contentBoxSize;
if (size) {
return getSizeFromInlineBlock(size);
}
const rect = entry.contentRect;
return { [MC.S_WIDTH]: rect[MC.S_WIDTH], [MC.S_HEIGHT]: rect[MC.S_HEIGHT] };
};
/**
* Returns the border box size of the given
* {@link https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserverEntry | ResizeObserverEntry}.
*
* @param fallbackToContent If the entry does not contain border box
* measurements (depending on browser), then fall back
* to using the content box size. Otherwise (by
* default) will return `NaN` values for width and
* height.
*
* @category Size measurements
*/
export const getEntryBorderBox = (
entry: ResizeObserverEntry,
fallbackToContent = false,
): Size => {
const size = entry.borderBoxSize;
if (size) {
return getSizeFromInlineBlock(size);
} else IEif (fallbackToContent) {
return getEntryContentBox(entry);
}
return { [MC.S_WIDTH]: NaN, [MC.S_HEIGHT]: NaN };
};
/**
* Returns true if the given string is a valid box type.
*
* @category Validation
*/
export const isValidBox = (box: string): box is Box =>
MH.includes(ALL_BOXES, box);
/**
* Returns true if the given string is a valid dimension.
*
* @category Validation
*/
export const isValidDimension = (dimension: string): dimension is Dimension =>
MH.includes(ALL_DIMENSIONS, dimension);
/**
* @ignore
* @internal
*/
export const tryGetViewportOverlay = (): HTMLElement | null =>
viewportOverlay ?? null;
/**
* @ignore
* @internal
*
* Exposed via SizeWatcher
*/
export const fetchViewportOverlay = async (): Promise<HTMLElement> => {
await init();
return viewportOverlay;
};
/**
* @ignore
* @internal
*/
export const fetchViewportSize = async (realtime = false) => {
if (!realtime) {
await waitForMeasureTime();
}
const root = MH.hasDOM()
? (MH.getDocScrollingElement() ?? MH.getBody())
: null;
return {
[MC.S_WIDTH]: root?.clientWidth ?? 0,
[MC.S_HEIGHT]: root?.clientHeight ?? 0,
};
};
// ----------------------------------------
const S_INLINE_SIZE = "inlineSize";
const S_BLOCK_SIZE = "blockSize";
const ALL_BOXES: Box[] = ["content", "border"] as const;
const ALL_DIMENSIONS: Dimension[] = [MC.S_WIDTH, MC.S_HEIGHT] as const;
const getSizeFromInlineBlock = (
size: ResizeObserverSize | ReadonlyArray<ResizeObserverSize>,
): Size => {
/* istanbul ignore else */
if (MH.isIterableObject(size)) {
return {
[MC.S_WIDTH]: size[0][S_INLINE_SIZE],
[MC.S_HEIGHT]: size[0][S_BLOCK_SIZE],
};
}
return {
// in some browsers inlineSize and blockSize are scalars and nor Arrays
[MC.S_WIDTH]: (size as { [S_INLINE_SIZE]: number })[S_INLINE_SIZE],
[MC.S_HEIGHT]: (size as { [S_BLOCK_SIZE]: number })[S_BLOCK_SIZE],
};
};
// ------------------------------
let viewportOverlay: HTMLElement;
let initPromise: Promise<void> | null = null;
const init = (): Promise<void> => {
if (!initPromise) {
initPromise = (async () => {
viewportOverlay = await createOverlay({
id: MH.prefixName("vp-ovrl"),
style: {
position: "fixed",
[MC.S_WIDTH]: "100vw",
[MC.S_HEIGHT]: "100vh",
},
});
})();
}
return initPromise;
};
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