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* @module Utils
*/
import * as MC from "@lisn/globals/minification-constants";
import * as MH from "@lisn/globals/minification-helpers";
import { Size, StrRecord } from "@lisn/globals/types";
/**
* Formats an object as a string. It supports more meaningful formatting as
* string for certain types rather than using the default string
* representation.
*
* **NOTE:** This is not intended for serialization of data that needs to be
* de-serialized. Only for debugging output.
*
* @param value The value to format as string.
* @param [maxLen] Maximum length of the returned string. If not given or
* is <= 0, the string is not truncated. Otherwise, if the
* result is longer than maxLen, it is truncated to
* `maxLen - 3` and added a suffix of "...".
* Note that if `maxLen` is > 0 but <= 3, the result is
* always "..."
*
* @category Text
*/
export const formatAsString = (value: unknown, maxLen?: number) => {
const result = maybeConvertToString(value, false);
if (!MH.isNullish(maxLen) && maxLen > 0 && MH.lengthOf(result) > maxLen) {
return result.slice(0, MH.max(0, maxLen - 3)) + "...";
}
return result;
};
/**
* Join an array of values as string using separator. It uses
* {@link formatAsString} rather than the default string representation as
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join | Array:join} would.
*
* @param separator The separator to use to delimit each argument.
* @param args Objects or values to convert to string and join.
*
* @category Text
*/
export const joinAsString = (separator: string, ...args: unknown[]) =>
args.map((a) => formatAsString(a)).join(separator);
/**
* Similar to
* {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split | String.prototype.split}
* except that
* 1. `limit` is interpreted as the maximum number of splits, and the
* returned array contains `limit + 1` entries. Also if `limit` is given and
* the number of substrings is greater than the limit, all the remaining
* substrings are present in the final substring.
* 2. If input is an empty string (or containing only whitespace), returns an
* empty array.
*
* @example
* ```javascript
* splitOn('foo, bar, baz', RegExp(',\\s*'), 0); // -> ['foo, bar, baz']
* splitOn('foo, bar, baz', RegExp(',\\s*'), 1); // -> ['foo', 'bar, baz']
* splitOn('foo, bar, baz', RegExp(',\\s*'), 2); // -> ['foo', 'bar', 'baz']
* splitOn('foo, bar, baz', RegExp(',\\s*'), 3); // -> ['foo', 'bar', 'baz']
* ```
*
* @param trim If true, entries will be trimmed for whitespace after splitting.
*
* @param limit If not given or < 0, the string will be split on every
* occurrence of `separator`. Otherwise, it will be split on
* the first `limit` number of occurrences of `separator`.
*
* @category Text
*/
export const splitOn = (
input: string,
separator: string | RegExp,
trim?: boolean,
limit?: number,
) => {
if (!input.trim()) {
return [];
}
limit ??= -1;
const output: string[] = [];
const addEntry = (s: string) => output.push(trim ? s.trim() : s);
while (limit--) {
let matchIndex = -1,
matchLength = 0;
if (MH.isLiteralString(separator)) {
matchIndex = input.indexOf(separator);
matchLength = MH.lengthOf(separator);
} else {
const match = separator.exec(input);
matchIndex = match?.index ?? -1;
matchLength = match ? MH.lengthOf(match[0]) : 0;
}
if (matchIndex < 0) {
break;
}
addEntry(input.slice(0, matchIndex));
input = input.slice(matchIndex + matchLength);
}
addEntry(input);
return output;
};
/**
* Converts a kebab-cased-string to camelCase.
* The result is undefined if the input string is not formatted in
* kebab-case.
*
* @category Text
*/
export const kebabToCamelCase = MH.kebabToCamelCase;
/**
* Converts a camelCasedString to kebab-case.
* The result is undefined if the input string is not formatted in
* camelCase.
*
* @category Text
*/
export const camelToKebabCase = MH.camelToKebabCase;
/**
* Generates a random string of a fixed length.
*
* **IMPORTANT:** This is _not_ suitable for cryptographic applications.
*
* @param nChars The length of the returned stirng.
*
* @category Text
*/
export const randId = (nChars = 8) => {
const segment = () =>
MH.floor(100000 + MC.MATH.random() * 900000).toString(36);
let s = "";
while (MH.lengthOf(s) < nChars) {
s += segment();
}
return s.slice(0, nChars);
};
/**
* Returns an array of numeric margins in pixels from the given margin string.
* The string should contain margins in either pixels or percentage; other
* units are not supported.
*
* Percentage values are converted to pixels relative to the given
* `absoluteSize`: left/right margins relative to the width, and top/bottom
* margins relative to the height.
*
* Note that for the margin property, percentages are always relative to the
* WIDTH of the parent, so you should pass the parent width as both the width
* and the height keys in `absoluteSize`. But for IntersectionObserver's
* `rootMargin`, top/bottom margin is relative to the height of the root, so
* pass the actual root size.
*
* @returns [topMarginInPx, rightMarginInPx, bottomMarginInPx, leftMarginInPx]
*
* @category Text
*/
export const toMargins = (value: string, absoluteSize: Size) => {
const toPxValue = (strValue: string | undefined, index: number) => {
let margin = MH.parseFloat(strValue ?? "") || 0;
Iif (strValue === margin + "%") {
margin *=
index % 2 ? absoluteSize[MC.S_HEIGHT] : absoluteSize[MC.S_WIDTH];
}
return margin;
};
const parts = splitOn(value, " ", true);
const margins: [number, number, number, number] = [
// top
toPxValue(parts[0], 0),
// right
toPxValue(parts[1] ?? parts[0], 1),
// bottom
toPxValue(parts[2] ?? parts[0], 2),
// left
toPxValue(parts[3] ?? parts[1] ?? parts[0], 3),
];
return margins;
};
/**
* @ignore
* @internal
*/
export const objToStrKey = (obj: StrRecord): string =>
MH.stringify(flattenForSorting(obj));
// --------------------
const flattenForSorting = (obj: StrRecord): unknown[] => {
const array = MH.isArray(obj)
? obj
: MH.keysOf(obj)
.sort()
.map((k) => obj[k]);
return array.map((value) => {
if (
MH.isArray(value) ||
(MH.isNonPrimitive(value) && MH.constructorOf(value) === MC.OBJECT)
) {
return flattenForSorting(value);
}
return value;
});
};
const stringifyReplacer = (key: string, value: unknown) =>
key ? maybeConvertToString(value, true) : value;
function maybeConvertToString<V>(value: V, nested: true): string | V;
function maybeConvertToString(value: unknown, nested: false): string;
function maybeConvertToString<V>(value: V, nested: boolean) {
let result: string | V = "";
if (MH.isElement(value)) {
const classStr = MH.classList(value).toString().trim();
result = value.id
? "#" + value.id
: `<${MH.tagName(value)}${classStr ? ' class="' + classStr + '"' : ""}>`;
//
} else if (MH.isInstanceOf(value, Error)) {
/* istanbul ignore else */
if ("stack" in value && MH.isString(value.stack)) {
result = value.stack;
} else {
result = `Error: ${value.message}`;
}
//
} else if (MH.isArray(value)) {
result =
"[" +
value
.map((v) =>
MH.isString(v) ? MH.stringify(v) : maybeConvertToString(v, false),
)
.join(",") +
"]";
//
} else if (MH.isIterableObject(value)) {
result =
MH.typeOrClassOf(value) +
"(" +
maybeConvertToString(MH.arrayFrom(value), false) +
")";
//
} else if (MH.isNonPrimitive(value)) {
result = nested ? value : MH.stringify(value, stringifyReplacer);
//
} else {
// primitive
result = nested ? value : MC.STRING(value);
}
return result;
}
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