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window.ts
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// Copyright 2019-2021 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
/**
* Provides APIs to create windows, communicate with other windows and manipulate the current window.
*
* This package is also accessible with `window.__TAURI__.window` when `tauri.conf.json > build > withGlobalTauri` is set to true.
*
* The APIs must be allowlisted on `tauri.conf.json`:
* ```json
* {
* "tauri": {
* "allowlist": {
* "window": {
* "all": true, // enable all window APIs
* "create": true // enable window creation
* }
* }
* }
* }
* ```
* It is recommended to allowlist only the APIs you use for optimal bundle size and security.
* @packageDocumentation
*/
import { invokeTauriCommand } from './helpers/tauri'
import { EventCallback, UnlistenFn, listen, once } from './event'
import { emit } from './helpers/event'
/** Allows you to retrieve information about a given monitor. */
interface Monitor {
/** Human-readable name of the monitor */
name: string | null
/** The monitor's resolution. */
size: PhysicalSize
/** the Top-left corner position of the monitor relative to the larger full screen area. */
position: PhysicalPosition
/** The scale factor that can be used to map physical pixels to logical pixels. */
scaleFactor: number
}
/** A size represented in logical pixels. */
class LogicalSize {
type = 'Logical'
width: number
height: number
constructor(width: number, height: number) {
this.width = width
this.height = height
}
}
/** A size represented in physical pixels. */
class PhysicalSize {
type = 'Physical'
width: number
height: number
constructor(width: number, height: number) {
this.width = width
this.height = height
}
/** Converts the physical size to a logical one. */
toLogical(scaleFactor: number): LogicalSize {
return new LogicalSize(this.width / scaleFactor, this.height / scaleFactor)
}
}
/** A position represented in logical pixels. */
class LogicalPosition {
type = 'Logical'
x: number
y: number
constructor(x: number, y: number) {
this.x = x
this.y = y
}
}
/** A position represented in physical pixels. */
class PhysicalPosition {
type = 'Physical'
x: number
y: number
constructor(x: number, y: number) {
this.x = x
this.y = y
}
/** Converts the physical position to a logical one. */
toLogical(scaleFactor: number): LogicalPosition {
return new LogicalPosition(this.x / scaleFactor, this.y / scaleFactor)
}
}
/** @ignore */
interface WindowDef {
label: string
}
/** @ignore */
declare global {
interface Window {
__TAURI__: {
__windows: WindowDef[]
__currentWindow: WindowDef
}
}
}
/**
* Get a handle to the current webview window. Allows emitting and listening to events from the backend that are tied to the window.
*
* @return The current window handle.
*/
function getCurrent(): WebviewWindowHandle {
return new WebviewWindowHandle(window.__TAURI__.__currentWindow.label)
}
/**
* Gets metadata for all available webview windows.
*
* @return The list of webview handles.
*/
function getAll(): WindowDef[] {
return window.__TAURI__.__windows
}
/** @ignore */
// events that are emitted right here instead of by the created webview
const localTauriEvents = ['tauri://created', 'tauri://error']
/**
* A webview window handle allows emitting and listening to events from the backend that are tied to the window.
*/
class WebviewWindowHandle {
/** Window label. */
label: string
/** Local event listeners. */
listeners: { [key: string]: Array<EventCallback<any>> }
constructor(label: string) {
this.label = label
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
this.listeners = Object.create(null)
}
/**
* Listen to an event emitted by the backend that is tied to the webview window.
*
* @param event Event name.
* @param handler Event handler.
* @returns A promise resolving to a function to unlisten to the event.
*/
async listen<T>(
event: string,
handler: EventCallback<T>
): Promise<UnlistenFn> {
if (this._handleTauriEvent(event, handler)) {
return Promise.resolve(() => {
// eslint-disable-next-line security/detect-object-injection
const listeners = this.listeners[event]
listeners.splice(listeners.indexOf(handler), 1)
})
}
return listen(event, handler)
}
/**
* Listen to an one-off event emitted by the backend that is tied to the webview window.
*
* @param event Event name.
* @param handler Event handler.
* @returns A promise resolving to a function to unlisten to the event.
*/
async once<T>(event: string, handler: EventCallback<T>): Promise<UnlistenFn> {
if (this._handleTauriEvent(event, handler)) {
return Promise.resolve(() => {
// eslint-disable-next-line security/detect-object-injection
const listeners = this.listeners[event]
listeners.splice(listeners.indexOf(handler), 1)
})
}
return once(event, handler)
}
/**
* Emits an event to the backend, tied to the webview window.
*
* @param event Event name.
* @param payload Event payload.
*/
async emit(event: string, payload?: string): Promise<void> {
if (localTauriEvents.includes(event)) {
// eslint-disable-next-line
for (const handler of this.listeners[event] || []) {
handler({ event, id: -1, payload })
}
return Promise.resolve()
}
return emit(event, this.label, payload)
}
_handleTauriEvent<T>(event: string, handler: EventCallback<T>): boolean {
if (localTauriEvents.includes(event)) {
if (!(event in this.listeners)) {
// eslint-disable-next-line
this.listeners[event] = [handler]
} else {
// eslint-disable-next-line
this.listeners[event].push(handler)
}
return true
}
return false
}
}
/**
* Create new webview windows and get a handle to existing ones.
* @example
* ```typescript
* // loading embedded asset:
* const webview = new WebviewWindow('theUniqueLabel', {
* url: 'path/to/page.html'
* })
* // alternatively, load a remote URL:
* const webview = new WebviewWindow('theUniqueLabel', {
* url: 'https://github.com/tauri-apps/tauri'
* })
*
* webview.once('tauri://created', function () {
* // webview window successfully created
* })
* webview.once('tauri://error', function (e) {
* // an error happened creating the webview window
* })
*
* // emit an event to the backend
* await webview.emit("some event", "data")
* // listen to an event from the backend
* const unlisten = await webview.listen("event name", e => {})
* unlisten()
* ```
*/
class WebviewWindow extends WebviewWindowHandle {
constructor(label: string, options: WindowOptions = {}) {
super(label)
invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'createWebview',
data: {
options: {
label,
...options
}
}
}
})
.then(async () => this.emit('tauri://created'))
.catch(async (e) => this.emit('tauri://error', e))
}
/**
* Gets the WebviewWindow handle for the webview associated with the given label.
*
* @param label The webview window label.
* @returns The handle to communicate with the webview or null if the webview doesn't exist.
*/
static getByLabel(label: string): WebviewWindowHandle | null {
if (getAll().some((w) => w.label === label)) {
return new WebviewWindowHandle(label)
}
return null
}
}
/**
* Manage the current window object.
*/
class WindowManager {
// Getters
/** The scale factor that can be used to map physical pixels to logical pixels. */
async scaleFactor(): Promise<number> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'scaleFactor'
}
})
}
/** The position of the top-left hand corner of the window's client area relative to the top-left hand corner of the desktop. */
async innerPosition(): Promise<PhysicalPosition> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'innerPosition'
}
})
}
/** The position of the top-left hand corner of the window relative to the top-left hand corner of the desktop. */
async outerPosition(): Promise<PhysicalPosition> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'outerPosition'
}
})
}
/**
* The physical size of the window's client area.
* The client area is the content of the window, excluding the title bar and borders.
*/
async innerSize(): Promise<PhysicalSize> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'innerSize'
}
})
}
/**
* The physical size of the entire window.
* These dimensions include the title bar and borders. If you don't want that (and you usually don't), use inner_size instead.
*/
async outerSize(): Promise<PhysicalSize> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'outerSize'
}
})
}
/** Gets the window's current fullscreen state. */
async isFullscreen(): Promise<boolean> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'isFullscreen'
}
})
}
/** Gets the window's current maximized state. */
async isMaximized(): Promise<boolean> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'isMaximized'
}
})
}
/** Gets the window's current decorated state. */
async isDecorated(): Promise<boolean> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'isDecorated'
}
})
}
// Setters
/**
* Updates the window resizable flag.
*
* @param resizable
* @returns A promise indicating the success or failure of the operation.
*/
async setResizable(resizable: boolean): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setResizable',
data: resizable
}
})
}
/**
* Sets the window title.
*
* @param title The new title
* @returns A promise indicating the success or failure of the operation.
*/
async setTitle(title: string): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setTitle',
data: title
}
})
}
/**
* Maximizes the window.
*
* @returns A promise indicating the success or failure of the operation.
*/
async maximize(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'maximize'
}
})
}
/**
* Unmaximizes the window.
*
* @returns A promise indicating the success or failure of the operation.
*/
async unmaximize(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'unmaximize'
}
})
}
/**
* Minimizes the window.
*
* @returns A promise indicating the success or failure of the operation.
*/
async minimize(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'minimize'
}
})
}
/**
* Unminimizes the window.
*
* @returns A promise indicating the success or failure of the operation.
*/
async unminimize(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'unminimize'
}
})
}
/**
* Sets the window visibility to true.
*
* @returns A promise indicating the success or failure of the operation.
*/
async show(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'show'
}
})
}
/**
* Sets the window visibility to false.
*
* @returns A promise indicating the success or failure of the operation.
*/
async hide(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'hide'
}
})
}
/**
* Closes the window.
*
* @returns A promise indicating the success or failure of the operation.
*/
async close(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'close'
}
})
}
/**
* Whether the window should have borders and bars.
*
* @param decorations Whether the window should have borders and bars.
* @returns A promise indicating the success or failure of the operation.
*/
async setDecorations(decorations: boolean): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setDecorations',
data: decorations
}
})
}
/**
* Whether the window should always be on top of other windows.
*
* @param alwaysOnTop Whether the window should always be on top of other windows or not.
* @returns A promise indicating the success or failure of the operation.
*/
async setAlwaysOnTop(alwaysOnTop: boolean): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setAlwaysOnTop',
data: alwaysOnTop
}
})
}
/**
* Resizes the window.
* @example
* ```typescript
* import { appWindow, LogicalSize } from '@tauri-apps/api/window'
* await appWindow.setSize(new LogicalSize(600, 500))
* ```
*
* @param size The logical or physical size.
* @returns A promise indicating the success or failure of the operation.
*/
async setSize(size: LogicalSize | PhysicalSize): Promise<void> {
if (!size || (size.type !== 'Logical' && size.type !== 'Physical')) {
throw new Error(
'the `size` argument must be either a LogicalSize or a PhysicalSize instance'
)
}
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setSize',
data: {
type: size.type,
data: {
width: size.width,
height: size.height
}
}
}
})
}
/**
* Sets the window min size. If the `size` argument is not provided, the min size is unset.
* @example
* ```typescript
* import { appWindow, PhysicalSize } from '@tauri-apps/api/window'
* await appWindow.setMinSize(new PhysicalSize(600, 500))
* ```
*
* @param size The logical or physical size.
* @returns A promise indicating the success or failure of the operation.
*/
async setMinSize(
size: LogicalSize | PhysicalSize | undefined
): Promise<void> {
if (size && size.type !== 'Logical' && size.type !== 'Physical') {
throw new Error(
'the `size` argument must be either a LogicalSize or a PhysicalSize instance'
)
}
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setMinSize',
data: size
? {
type: size.type,
data: {
width: size.width,
height: size.height
}
}
: null
}
})
}
/**
* Sets the window max size. If the `size` argument is undefined, the max size is unset.
* @example
* ```typescript
* import { appWindow, LogicalSize } from '@tauri-apps/api/window'
* await appWindow.setMaxSize(new LogicalSize(600, 500))
* ```
*
* @param size The logical or physical size.
* @returns A promise indicating the success or failure of the operation.
*/
async setMaxSize(
size: LogicalSize | PhysicalSize | undefined
): Promise<void> {
if (size && size.type !== 'Logical' && size.type !== 'Physical') {
throw new Error(
'the `size` argument must be either a LogicalSize or a PhysicalSize instance'
)
}
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setMaxSize',
data: size
? {
type: size.type,
data: {
width: size.width,
height: size.height
}
}
: null
}
})
}
/**
* Sets the window position.
* @example
* ```typescript
* import { appWindow, LogicalPosition } from '@tauri-apps/api/window'
* await appWindow.setPosition(new LogicalPosition(600, 500))
* ```
*
* @param position The new position, in logical or physical pixels.
* @returns A promise indicating the success or failure of the operation.
*/
async setPosition(
position: LogicalPosition | PhysicalPosition
): Promise<void> {
if (
!position ||
(position.type !== 'Logical' && position.type !== 'Physical')
) {
throw new Error(
'the `position` argument must be either a LogicalPosition or a PhysicalPosition instance'
)
}
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setPosition',
data: {
type: position.type,
data: {
x: position.x,
y: position.y
}
}
}
})
}
/**
* Sets the window fullscreen state.
*
* @param fullscreen Whether the window should go to fullscreen or not.
* @returns A promise indicating the success or failure of the operation.
*/
async setFullscreen(fullscreen: boolean): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setFullscreen',
data: fullscreen
}
})
}
/**
* Sets the window icon.
*
* @param icon Icon bytes or path to the icon file.
* @returns A promise indicating the success or failure of the operation.
*/
async setIcon(icon: string | number[]): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'setIcon',
data: {
icon
}
}
})
}
/**
* Starts dragging the window.
*
* @return A promise indicating the success or failure of the operation.
*/
async startDragging(): Promise<void> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'startDragging'
}
})
}
}
/** The manager for the current window. Allows you to manipulate the window object. */
const appWindow = new WindowManager()
/** Configuration for the window to create. */
interface WindowOptions {
/**
* Remote URL or local file path to open, e.g. `https://github.com/tauri-apps` or `path/to/page.html`.
*/
url?: string
/** The initial vertical position. Only applies if `y` is also set. */
x?: number
/** The initial horizontal position. Only applies if `x` is also set. */
y?: number
/** The initial width. */
width?: number
/** The initial height. */
height?: number
/** The minimum width. Only applies if `minHeight` is also set. */
minWidth?: number
/** The minimum height. Only applies if `minWidth` is also set. */
minHeight?: number
/** The maximum width. Only applies if `maxHeight` is also set. */
maxWidth?: number
/** The maximum height. Only applies if `maxWidth` is also set. */
maxHeight?: number
/** Whether the window is resizable or not. */
resizable?: boolean
/** Window title. */
title?: string
/** Whether the window is in fullscreen mode or not. */
fullscreen?: boolean
/** Whether the window is transparent or not. */
transparent?: boolean
/** Whether the window should be maximized upon creation or not. */
maximized?: boolean
/** Whether the window should be immediately visible upon creation or not. */
visible?: boolean
/** Whether the window should have borders and bars or not. */
decorations?: boolean
/** Whether the window should always be on top of other windows or not. */
alwaysOnTop?: boolean
}
/**
* Returns the monitor on which the window currently resides.
* Returns `null` if current monitor can't be detected.
*/
async function currentMonitor(): Promise<Monitor | null> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'currentMonitor'
}
})
}
/**
* Returns the primary monitor of the system.
* Returns `null` if it can't identify any monitor as a primary one.
*/
async function primaryMonitor(): Promise<Monitor | null> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'primaryMonitor'
}
})
}
/** Returns the list of all the monitors available on the system. */
async function availableMonitors(): Promise<Monitor[]> {
return invokeTauriCommand({
__tauriModule: 'Window',
message: {
cmd: 'availableMonitors'
}
})
}
export {
WebviewWindow,
WebviewWindowHandle,
WindowManager,
getCurrent,
getAll,
appWindow,
LogicalSize,
PhysicalSize,
LogicalPosition,
PhysicalPosition,
currentMonitor,
primaryMonitor,
availableMonitors
}
export type { Monitor, WindowOptions }