mathlive

/* 0.59.0 */ import { ErrorListener, MacroDictionary, ParseMode, ParserErrorCode, MathfieldErrorCode } from './core'; import type { Mathfield } from './mathfield'; import type { Selector } from './commands'; /** * A keybinding associates a combination of physical keyboard keys with a * command. * * For example: * * ```javascript * { * "key": "cmd+a", * "command": "selectAll", * }, * { * "key": 'ctrl+[Digit2]', * "ifMode": 'math', * "command": ['insert', '\\sqrt{#0}'], * } * ``` * */ export declare type Keybinding = { /** * The pressed keys that will trigger this keybinding. * * The `key` is made up of modifiers and the key itself. * * The following modifiers can be used: * * | Platform | Modifiers | * | :----- | :----- | * | macOS, iOS | `ctrl`, `shift`, `alt`, `cmd` | * | Windows | `ctrl`, `shift`, `alt`, `win` | * | Linux, Android, ChromeOS | `ctrl`, `shift`, `alt`, `meta` | * * If the `cmd` modifier is used, the keybinding will only apply on macOS. * If the `win` modifier is used, the keybinding will only apply to Windows. * If the `meta` modifier is used, the keybinding will apply to platforms * other than macOS or Windows. * * The `alt` key is the `option` key on Apple keyboards. * * * The following values for keys can be used: * * `a`–`z`, `0`–`9` * * `` ` ``, `-`, `=`, `[`, `]`, `\`, `;`, `'`, `,`, `.`, `/` * * `left`, `up`, `right`, `down`, `pageup`, `pagedown`, `end`, `home` * * `tab`, `enter`, `escape`, `space`, `backspace`, `delete` * * `f1`–`f19` * * `pausebreak`, `capslock`, `insert` * * `numpad0`–`numpad9`, `numpad_multiply`, `numpad_add`, `numpad_separator` * * `numpad_subtract`, `numpad_decimal`, `numpad_divide` * * The values will be remapped based on the current keyboard layout. So, for * example if `a` is used, on a French AZERTY keyboard the keybinding will be * associated with the key labeled 'A' (event though it corresponds to the * key labeled 'Q' on a US QWERTY keyboard). * * To associate keybindings with physical keys independent of the keyboard * layout, use the following keycodes: * * - `[KeyA]`–`[KeyZ]`, `[Digit0]`–`[Digit9]` * - `[Backquote]`, `[Minus]`, `[Equal]`, `[BracketLeft]`, `[BracketRight]`, `[Backslash]`, `[Semicolon]`, `[Quote]`, `[Comma]`, `[Period]`, `[Slash]` * - `[ArrowLeft]`, `[ArrowUp]`, `[ArrowRight]`, `[ArrowDown]`, `[PageUp]`, `[PageDown]`, `[End]`, `[Home]` * - `[Tab]`, `[Enter]`, `[Escape]`, `[Space]`, `[Backspace]`, `[Delete]` * - `[F1]`–`[F19]` * - `[Pause]`, `[CapsLock]`, `[Insert]` * - `[Numpad0]`–`[Numpad9]`, `[NumpadMultiply]`, `[NumpadAdd]`, `[NumpadComma]` * - `[NumpadSubtract]`, `[NumpadDecimal]`, `[NumpadDivide]` * * For example, using `[KeyQ]` will map to the the key labeled 'Q' on a QWERTY * keyboard, and to the key labeled 'A' on an AZERTY keyboard. * * As a general guideline, it is preferable to use the key values `a`–`z` * for keybinding that are pseudo-mnemotechnic. For the other, it is generally * preferable to use the keycodes. * * Consider the key combination: `alt+2`. With an AZERTY (French) layout, * the digits (i.e. '2') are only accessible when shifted. The '2' key produces * 'é' when not shifted. It is therefore impossible on an AZERTY keyboard to * produce the `alt+2` key combination, at best it would be `alt+shift+2`. * To indicate that the intended key combination should be `alt` and the * key on the keyboard which has the position of the `2` key on a US keyboard, * a key code should be used instead: `alt+[Digit2]`. This will correspond * to a key combination that can be generated on any keyboard. * * If a keybinding is invalid (impossible to produce) with the current * keyboard layout, an error will be generated, and the `onError` listener * will be called with a `invalid-keybinding` error code. * */ key: string; /** The command is a single selector, or a selector with arguments */ command: Selector | [Selector, ...any[]]; /** * If specified, this indicates in which mode this keybinding will apply. * If none is specified, the keybinding apply in every mode. */ ifMode?: ParseMode; /** * If specified, this indicates the OS platform to which this keybinding * apply. * * For example, if set to `!macos` this key binding will apply to every * platform, except macOS. * */ ifPlatform?: 'macos' | '!macos' | 'windows' | '!windows' | 'linux' | '!linux' | 'ios' | '!ios' | 'android' | '!android' | 'chromeos' | '!chromeos'; }; /** * An inline shortcut can be specified as a simple string or as * an object literal with additional options: * *```javascript * config.inlineShortcuts = { * half: '\\frac{1}{2}', * in: { * mode: 'math', * after: 'space+letter+digit+symbol+fence', * value: '\\in', * }, * }; *``` * * When using a string, the shortcut will apply in any mode, and regardless * of the characters surrounding it. * * When using an object literal the `value` key is required an indicate the * shortcut substitution. * * The `mode` key, if present, indicate which mode this shortcut will * apply in, either `'math'` or `'text'`. If the key is not present the * shortcut apply in all modes. * * The `'after'` key, if present, indicate in what context (surrounding characters) * the shortcut will apply. One or more values can be specified, separated by a '+' * sign. If any of the values match, the shortcut will be applicable. * * * Possible values are: * * | | | * | :----- | :----- | * | `'space'` | A spacing command, such as `\quad` | * | `'nothing'`| The begining of a group | * | `'surd'` |A square root or n-th root | * | `'frac'` |A fraction| * | `'function'` |A function such as `\sin` or `f`| * | `'letter'` |A letter, such as `x` or `n`| * | `'digit'` |`0` through `9`| * | `'binop'` |A binary operator, such as `+`| * | `'relop'` |A relational operator, such as `=`| * | `'punct'` |A punctuation mark, such as `,`| * | `'array'` |An array, such as a matrix or cases statement| * | `'openfence'` |An opening fence, such as `(`| * | `'closefence'` | A closing fence such as `}`| * | `'text'`| Some plain text| */ export declare type InlineShortcutDefinition = string | { value: string; mode?: ParseMode; after?: string; }; export declare type TextToSpeechOptions = { /** * Specify which set of text to speech rules to use. * * A value of `mathlive` indicates that the simple rules built into MathLive * should be used. * * A value of `sre` indicates that the Speech Rule Engine from Volker Sorge * should be used. * * **(Caution)** SRE is not included or loaded by MathLive. For this option to * work SRE should be loaded separately. * * **See** * {@link https://github.com/arnog/mathlive/tree/master/examples/speech | speech example} */ textToSpeechRules: 'mathlive' | 'sre'; /** * The markup syntax to use for the output of conversion to spoken text. * * Possible values are `ssml` for the SSML markup or `mac` for the macOS * markup, i.e. `[[ltr]]`. * */ textToSpeechMarkup: '' | 'ssml' | 'ssml_step' | 'mac'; /** * A set of key/value pairs that can be used to configure the speech rule * engine. * * Which options are available depends on the speech rule engine in use. * There are no options available with MathLive's built-in engine. The * options for the SRE engine are documented * {@link https://github.com/zorkow/speech-rule-engine | here} */ textToSpeechRulesOptions: { [key: string]: string; }; /** * Indicates which speech engine to use for speech output. * * Use `local` to use the OS-specific TTS engine. * * Use `amazon` for Amazon Text-to-Speech cloud API. You must include the * AWS API library and configure it with your API key before use. * * **See** * {@link https://github.com/arnog/mathlive/tree/master/examples/speech | speech example} */ speechEngine: 'local' | 'amazon'; /** * Indicates the voice to use with the speech engine. * * This is dependent on the speech engine. For Amazon Polly, see here: * https://docs.aws.amazon.com/polly/latest/dg/voicelist.html * */ speechEngineVoice: string; /** * Sets the speed of the selected voice. * * One of `x-slow`, `slow`, `medium`, `fast`, `x-fast` or a value as a * percentage. * * Range is `20%` to `200%` For example `200%` to indicate a speaking rate * twice the default rate. */ speechEngineRate: string; speakHook: (text: string, config: Partial<MathfieldOptions>) => void; readAloudHook: (element: HTMLElement, text: string, config: MathfieldOptions) => void; }; /** * */ export interface VirtualKeyboardKeycap { /** * The string displayed for the keycap */ label?: string; /** * Command to perform when the keycap is pressed */ command?: string; /** * Latex fragment to insert when the keycap is pressed * (ignored if command is specified) */ insert?: string; /** * Label of the key as a Latex expression, also the Latex * inserted if no `command` or `insert` property is specified. */ latex?: string; /** * Key to insert when keycap is pressed * (ignored if `command`, `insert` or `latex` is specified) */ key?: string; /** CSS class to apply to the keycap. */ class?: string; /** * Markup displayed with the key label (for example to explain what the symbol of the key is) */ aside?: string; /** * A named set of alternate keys to display when there is a long press on the key. */ altKeys?: string; /** * Markup for the label of the key when the shift key is pressed */ shifted?: string; /** * Command to perform when the shifted key is pressed */ shiftedCommand?: string; } export interface VirtualKeyboardLayer { styles?: string; backdrop?: string; container?: string; rows?: VirtualKeyboardKeycap[][]; } export declare type VirtualKeyboardOptions = { /** * If specified, the markup to be used to display the virtual keyboard * toggle glyph. If none is specified a default keyboard icon is used. */ virtualKeyboardToggleGlyph: string; /** * - `'manual'`: pressing the virtual keyboard toggle button will show or hide * the virtual keyboard. If hidden, the virtual keyboard is not shown when * the field is focused until the toggle button is pressed. * - `'onfocus'`: the virtual keyboard will be displayed whenever the field is * focused and hidden when the field loses focus. In that case, the virtual * keyboard toggle button is not displayed. * - `'off'`: the virtual keyboard toggle button is not displayed, and the * virtual keyboard is never triggered. * * If the setting is empty, it will default to `'onfocus'` on touch-capable * devices and to `'off'` otherwise. * */ virtualKeyboardMode: 'auto' | 'manual' | 'onfocus' | 'off'; /** * A space separated list of the keyboards that should be available. The * keyboard `'all'` is synonym with `'numeric'`, `'functions'``, `'symbols'`` * `'roman'` and `'greek'`, * * The keyboards will be displayed in the order indicated. */ virtualKeyboards: 'all' | 'numeric' | 'roman' | 'greek' | 'functions' | 'symbols' | 'command' | string; virtualKeyboardLayout: 'auto' | 'qwerty' | 'azerty' | 'qwertz' | 'dvorak' | 'colemak'; /** * Some additional custom virtual keyboard layers. * * A keyboard is made up of one or more layers (think of the main layer and the * shift layer on a hardware keyboard). Each key in this object define a new * keyboard layer (or replace an existing one). The value of the key should be * some HTML markup. * * **See** * {@link https://github.com/arnog/mathlive/tree/master/examples/virtual_keyboard | virtual keyboard example} * */ customVirtualKeyboardLayers: { [layerName: string]: string | VirtualKeyboardLayer; }; customVirtualKeyboards: { [layerName: string]: string; }; /** * The visual theme used for the virtual keyboard. * * If empty, the theme will switch automatically based on the device it's * running on. The two supported themes are 'material' and 'apple' (the * default). */ virtualKeyboardTheme: 'material' | 'apple' | ''; /** * When a key on the virtual keyboard is pressed, produce a short haptic * feedback, if the device supports it. */ keypressVibration: boolean; /** * When a key on the virtual keyboard is pressed, produce a short audio * feedback. The value should be either a URL to a sound file or an object * with the following keys: * * - `delete` URL to a sound file played when the delete key is pressed * - `return` ... when the return/tab key is pressed * - `spacebar` ... when the spacebar is pressed * - `default` ... when any other key is pressed. This key is required, * the others are optional. If they are missing, this sound is played as * well. */ keypressSound: string | HTMLAudioElement | { spacebar?: string | HTMLAudioElement; return?: string | HTMLAudioElement; delete?: string | HTMLAudioElement; default: string | HTMLAudioElement; }; /** * URL to a sound file which will be played to provide feedback when a * command has no effect, for example when pressing the spacebar at the root * level. */ plonkSound?: string | HTMLAudioElement; }; /** * These methods provide an opportunity to intercept or modify an action. * Their return value indicate whether the default handling should proceed. * * @deprecated Use corresponding events of `MathfieldEvent` instead */ export interface MathfieldHooks { /** * A hook invoked when a keystroke is about to be processed. * * - <var>keystroke</var>: a string describing the keystroke * - <var>ev</var>: the native keyboard event * * Return `false` to stop the handling of the event. */ onKeystroke: (sender: Mathfield, keystroke: string, ev: KeyboardEvent) => boolean; /** * A hook invoked when keyboard navigation would cause the insertion * point to leave the mathfield. * * - <var>direction</var> indicates the direction of the navigation, either * `"forward"` or `"backward"` or `"upward"` or `"downward"`. * * Return `false` to prevent the move, `true` to wrap around to the * start of the field. * * By default, the insertion point will wrap around. */ onMoveOutOf: (sender: Mathfield, direction: 'forward' | 'backward' | 'upward' | 'downward') => boolean; /** * A hook invoked when pressing tab (or shift-tab) would cause the * insertion point to leave the mathfield. * * <var>direction</var> indicates the direction of the navigation. * * By default, the insertion point jumps to the next/previous focussable * element. * */ onTabOutOf: (sender: Mathfield, direction: 'forward' | 'backward') => boolean; } export declare type UndoStateChangeListener = (target: Mathfield, action: 'undo' | 'redo' | 'snapshot') => void; /** * The methods provide a notification that an event is about to occur or has * occured. * * In general instead of using this interface you should be listening to the * corresponding event on `MathfieldElement`, i.e. * ```javascript mfe.addEventListener('input', (ev) => { console.log(ev.target.value); }); * ``` * @deprecated Use corresponding events of `MathfieldEvent` instead */ export interface MathfieldListeners { /** The mathfield has lost keyboard focus */ onBlur: (sender: Mathfield) => void; /** The mathfield has gained keyboard focus */ onFocus: (sender: Mathfield) => void; onContentWillChange: (sender: Mathfield) => void; onContentDidChange: (sender: Mathfield) => void; onSelectionWillChange: (sender: Mathfield) => void; onSelectionDidChange: (sender: Mathfield) => void; onUndoStateWillChange: UndoStateChangeListener; onUndoStateDidChange: UndoStateChangeListener; onCommit: (sender: Mathfield) => void; onModeChange: (sender: Mathfield, mode: ParseMode) => void; onVirtualKeyboardToggle: (sender: Mathfield, visible: boolean, keyboardElement: HTMLElement) => void; onReadAloudStatus: (sender: Mathfield) => void; } export declare type KeyboardOptions = { keybindings: Keybinding[]; }; export declare type InlineShortcutsOptions = { /** @deprecated Use: * ```javascript * mf.setConfig( * 'inlineShortcuts', * { ...mf.getConfig('inlineShortcuts'), * ...newShortcuts * } * ) * ``` * to add `newShortcuts` to the default ones */ overrideDefaultInlineShortcuts: boolean; /** * The keys of this object literal indicate the sequence of characters * that will trigger an inline shortcut. * * {@inheritDoc InlineShortcutDefinition} */ inlineShortcuts: { [key: string]: InlineShortcutDefinition; }; /** * Maximum time, in milliseconds, between consecutive characters for them to be * considered part of the same shortcut sequence. * * A value of 0 is the same as infinity: any consecutive character will be * candidate for an inline shortcut, regardless of the interval between this * character and the previous one. * * A value of 750 will indicate that the maximum interval between two * characters to be considered part of the same inline shortcut sequence is * 3/4 of a second. * * This is useful to enter "+-" as a sequence of two characters, while also * supporting the "±" shortcut with the same sequence. * * The first result can be entered by pausing slightly between the first and * second character if this option is set to a value of 250 or so. * * Note that some operations, such as clicking to change the selection, or * losing the focus on the mathfield, will automatically timeout the * shortcuts. */ inlineShortcutTimeout: number; }; export declare type LocalizationOptions = { /** * The locale (language + region) to use for string localization. * * If none is provided, the locale of the browser is used. * */ locale: string; /** * An object whose keys are a locale string, and whose values are an object of * string identifier to localized string. * * **Example** * ```json { "fr-CA": { "tooltip.undo": "Annuler", "tooltip.redo": "Refaire", } } ``` * * This will override the default localized strings. */ strings: { [locale: string]: { [key: string]: string; }; }; }; export declare type EditingOptions = { /** When true, the user cannot edit the mathfield. */ readOnly: boolean; /** * When true, during text input the field will switch automatically between * 'math' and 'text' mode depending on what is typed and the context of the * formula. If necessary, what was previously typed will be 'fixed' to * account for the new info. * * For example, when typing "if x >0": * * | Type | Interpretation | * |---:|:---| * | "i" | math mode, imaginary unit | * | "if" | text mode, english word "if" | * | "if x" | all in text mode, maybe the next word is xylophone? | * | "if x >" | "if" stays in text mode, but now "x >" is in math mode | * | "if x > 0" | "if" in text mode, "x > 0" in math mode | * * Smart Mode is off by default. * * Manually switching mode (by typing `alt/option+=`) will temporarily turn * off smart mode. * * * **Examples** * * - slope = rise/run * - If x > 0, then f(x) = sin(x) * - x^2 + sin (x) when x > 0 * - When x<0, x^{2n+1}<0 * - Graph x^2 -x+3 =0 for 0<=x<=5 * - Divide by x-3 and then add x^2-1 to both sides * - Given g(x) = 4x – 3, when does g(x)=0? * - Let D be the set {(x,y)|0<=x<=1 and 0<=y<=x} * - \int\_{the unit square} f(x,y) dx dy * - For all n in NN * */ smartMode: boolean; /** * When `true` and an open fence is entered via `typedText()` it will * generate a contextually appropriate markup, for example using * `\left...\right` if applicable. * * When `false`, the literal value of the character will be inserted instead. */ smartFence: boolean; /** * When `true`, when a digit is entered in an empty superscript, the cursor * leaps automatically out of the superscript. This makes entry of common * polynomials easier and faster. If entering other characters (for example * "n+1") the navigation out of the superscript must be done manually (by * using the cursor keys or the spacebar to leap to the next insertion * point). * * When `false`, the navigation out of the superscript must always be done * manually. * */ smartSuperscript: boolean; /** * This option controls how many levels of subscript/superscript can be entered. For * example, if `scriptDepth` is "1", there can be one level of superscript or * subscript. Attempting to enter a superscript while inside a superscript will * be rejected. Setting a value of 0 will prevent entry of any superscript or * subscript (but not limits for sum, integrals, etc...) * * This can make it easier to enter equations that fit what's expected for the * domain where the mathfield is used. * * To control the depth of superscript and subscript independently, provide an * array: the first element indicate the maximum depth for subscript and the * second element the depth of superscript. Thus, a value of `[0, 1]` would * suppress the entry of subscripts, and allow one level of superscripts. */ scriptDepth: number | [number, number]; /** * If `true`, extra parentheses around a numerator or denominator are * removed automatically. */ removeExtraneousParentheses: boolean; /** * When `true` and the spacebar is pressed, no space is inserted. * * When `false`, a space is inserted when the spacebar is pressed. */ ignoreSpacebarInMathMode: boolean; }; export declare type LayoutOptions = { defaultMode: 'math' | 'text'; /** *A dictionary of LaTeX macros to be used to interpret and render the content. * *For example, to add a new macro to the default macro dictionary: * ```javascript mf.setConfig({ macros: { ...mf.getOption('macros'), smallfrac: '^{#1}\\!\\!/\\!_{#2}', }, }); ``` * * Note that `getOption()` is called to keep the existing macros and add to them. * Otherwise, all the macros are replaced with the new definition. * * The code above will support the following notation: * ```tex \smallfrac{5}{16} ``` */ macros: MacroDictionary; /** * Scaling factor to be applied to horizontal spacing between elements of * the formula. A value greater than 1.0 can be used to improve the * legibility. * */ horizontalSpacingScale: number; /** * Control the letter shape style: | `letterShapeStyle` | xyz | ABC | αβɣ | ΓΔΘ | | ------------------ | --- | --- | --- | --- | | `iso` | it | it | it | it | | `tex` | it | it | it | up | | `french` | it | up | up | up | | `upright` | up | up | up | up | (it) = italic (up) = upright * The default letter shape style is `auto`, which indicates that `french` * should be used if the locale is "french", and `tex` otherwise. * * **(Historical Note)** * * Where do the "french" rules come from? The * TeX standard font, Computer Modern, is based on Monotype 155M, itself * based on the Porson greek font which was one of the most widely used * Greek fonts in english-speaking countries. This font had upright * capitals, but slanted lowercase. In France, the traditional font for * greek was Didot, which has both upright capitals and lowercase. * * * As for roman uppercase, they are recommended by "Lexique des règles * typographiques en usage à l’Imprimerie Nationale". It should be noted * that this convention is not universally followed. * --- */ letterShapeStyle: 'auto' | 'tex' | 'iso' | 'french' | 'upright'; }; /** * @keywords security, trust, sanitize, errors */ export declare type MathfieldOptions = LayoutOptions & EditingOptions & LocalizationOptions & InlineShortcutsOptions & KeyboardOptions & VirtualKeyboardOptions & TextToSpeechOptions & MathfieldHooks & MathfieldListeners & { /** * Namespace that is added to `data-` attributes to avoid collisions * with other libraries. * * The namespace should be a string of lowercase letters. * * It is empty by default. * * @deprecated */ namespace: string; /** * An optional listener function that will be * invoked when an error is encountered. * * This could be a Latex parsing error, for the initial value of the * mathfield, a value inserted programmatically later, or through a * user interaction (pasting in the mathfield for example). * See [[`ParserErrorCode`]] for the list of possible parsing errors. * * This could also be another kind of error, such as an invalid keybinding. * */ onError: ErrorListener<ParserErrorCode | MathfieldErrorCode>; /** * This function provides the option of substituting the focusable DOM * element used to capture keyboard input. * * An (invisible) DOM element is used to capture the keyboard events. By * default, this element is a `<textarea>` on desktop and a `<span>` on * mobile devices, to prevent the device virtual keyboard from being * displayed. * * Alternatively, the ID of a DOM element can be provided. */ substituteTextArea: string | (() => HTMLElement); /** * A URL fragment pointing to the directory containing the fonts * necessary to render a formula. * * These fonts are available in the `/dist/fonts` directory of the SDK. * * Customize this value to reflect where you have copied these fonts, * or to use the CDN version. * * The default value is './fonts'. * * Changing this setting after the mathfield has been created will have * no effect. * * ```javascript * { * // Use the CDN version * fontsDirectory: '' * } * ``` * ```javascript * { * // Use a directory called 'fonts', located next to the * // `mathlive.js` (or `mathlive.mjs`) file. * fontsDirectory: './fonts' * } * ``` * ```javascript * { * // Use a directory located at the top your website * fontsDirectory: 'https://example.com/fonts' * } * ``` * */ fontsDirectory: string; /** * Support for [Trusted Type](https://w3c.github.io/webappsec-trusted-types/dist/spec/). * * This optional function will be called before a string of HTML is * injected in the DOM, allowing that string to be sanitized * according to a policy defined by the host. */ createHTML: (html: string) => any; }; /** * @deprecated Use [[`MathfieldOptions`]] */ export declare type MathfieldConfig = MathfieldOptions; /** * See [[`setKeyboardLayout`]]. * * | Name | Platform | Display name | * | :----- | :----- | :----- | * | `'apple.en-intl'` | Apple | English (International) | * | `'apple.french'` | Apple | French (AZERTY) | * | `'apple.german'` | Apple | German (QWERTZ) | * | `'windows.en-intl'` | Windows | English (International) | * | `'windows.french'` | Windows | French (AZERTY) | * | `'windows.german'` | Windows | German (QWERTZ) | * | `'linux.en'` | Linux | English | * | `'linux.french'` | Linux | French (AZERTY) | * | `'linux.german'` | Linux | German (QWERTZ) | */ export declare type KeyboardLayoutName = 'apple.en-intl' | 'apple.french' | 'apple.german' | 'apple.spanish' | 'windows.en-intl' | 'windows.french' | 'windows.german' | 'windows.spanish' | 'linux.en' | 'linux.french' | 'linux.german' | 'linux.spanish'; /** * Change the current physical keyboard layout. * * Note that this affects some keybindings, but not general text input. * * If set to `auto` the keyboard layout is guessed. * */ export declare function setKeyboardLayout(name: KeyboardLayoutName | 'auto'): void; /** * Change the current physical keyboard layout to a layout that matches the * specified locale, if one is available. * * Note that this affects some keybindings, but not general text input. * */ export declare function setKeyboardLayoutLocale(locale: string): void;