| 1 | import {Value} from './index';
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| 2 |
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| 3 | /**
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| 4 | * Sass's [string type](https://sass-lang.com/documentation/values/strings).
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| 5 | *
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| 6 | * @category Custom Function
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| 7 | */
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| 8 | export class SassString extends Value {
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| 9 | /**
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| 10 | * Creates a new string.
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| 11 | *
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| 12 | * @param text - The contents of the string. For quoted strings, this is the
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| 13 | * semantic content—any escape sequences that were been written in the source
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| 14 | * text are resolved to their Unicode values. For unquoted strings, though,
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| 15 | * escape sequences are preserved as literal backslashes.
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| 16 | *
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| 17 | * @param options.quotes - Whether the string is quoted. Defaults to `true`.
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| 18 | */
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| 19 | constructor(
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| 20 | text: string,
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| 21 | options?: {
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| 22 | quotes?: boolean;
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| 23 | }
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| 24 | );
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| 25 |
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| 26 | /**
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| 27 | * Creates an empty string.
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| 28 | *
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| 29 | * @param options.quotes - Whether the string is quoted. Defaults to `true`.
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| 30 | */
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| 31 | constructor(options?: {quotes?: boolean});
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| 32 |
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| 33 | /**
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| 34 | * The contents of the string.
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| 35 | *
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| 36 | * For quoted strings, this is the semantic content—any escape sequences that
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| 37 | * were been written in the source text are resolved to their Unicode values.
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| 38 | * For unquoted strings, though, escape sequences are preserved as literal
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| 39 | * backslashes.
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| 40 | *
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| 41 | * This difference allows us to distinguish between identifiers with escapes,
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| 42 | * such as `url\u28 http://example.com\u29`, and unquoted strings that contain
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| 43 | * characters that aren't valid in identifiers, such as
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| 44 | * `url(http://example.com)`. Unfortunately, it also means that we don't
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| 45 | * consider `foo` and `f\6F\6F` the same string.
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| 46 | */
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| 47 | get text(): string;
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| 48 |
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| 49 | /** Whether this string has quotes. */
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| 50 | get hasQuotes(): boolean;
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| 51 |
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| 52 | /**
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| 53 | * Sass's notion of this string's length.
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| 54 | *
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| 55 | * Sass treats strings as a series of Unicode code points while JavaScript
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| 56 | * treats them as a series of UTF-16 code units. For example, the character
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| 57 | * U+1F60A SMILING FACE WITH SMILING EYES is a single Unicode code point but
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| 58 | * is represented in UTF-16 as two code units (`0xD83D` and `0xDE0A`). So in
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| 59 | * JavaScript, `"n😊b".length` returns `4`, whereas in Sass
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| 60 | * `string.length("n😊b")` returns `3`.
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| 61 | */
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| 62 | get sassLength(): number;
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| 63 |
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| 64 | /**
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| 65 | * Converts `sassIndex` to a JavaScript index into [[text]].
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| 66 | *
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| 67 | * Sass indices are one-based, while JavaScript indices are zero-based. Sass
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| 68 | * indices may also be negative in order to index from the end of the string.
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| 69 | *
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| 70 | * In addition, Sass indices refer to Unicode code points while JavaScript
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| 71 | * string indices refer to UTF-16 code units. For example, the character
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| 72 | * U+1F60A SMILING FACE WITH SMILING EYES is a single Unicode code point but
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| 73 | * is represented in UTF-16 as two code units (`0xD83D` and `0xDE0A`). So in
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| 74 | * JavaScript, `"n😊b".charCodeAt(1)` returns `0xD83D`, whereas in Sass
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| 75 | * `string.slice("n😊b", 1, 1)` returns `"😊"`.
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| 76 | *
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| 77 | * This function converts Sass's code point indices to JavaScript's code unit
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| 78 | * indices. This means it's O(n) in the length of `text`.
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| 79 | *
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| 80 | * @throws `Error` - If `sassIndex` isn't a number, if that number isn't an
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| 81 | * integer, or if that integer isn't a valid index for this string.
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| 82 | */
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| 83 | sassIndexToStringIndex(sassIndex: Value, name?: string): number;
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| 84 | }
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| 85 | |
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