146 lines
4.2 KiB
JavaScript
146 lines
4.2 KiB
JavaScript
/** Report capabilities with guaranteed values.
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*/
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export class Capabilities {
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/** Returns the browser userAgent.
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@return {string}
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*/
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static get userAgent() {
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return navigator.userAgent || 'Unknown Agent'
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}
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/** Tests whether the app is running on a mobile device.
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Implemented as a readonly attribute.
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@return {boolean}
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*/
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static get isMobile() {
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return (/Mobi/.test(navigator.userAgent))
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}
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/** Tests whether the app is running on a iOS device.
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Implemented as a readonly attribute.
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@return {boolean}
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*/
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static get isIOS() {
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return (/iPad|iPhone|iPod/.test(navigator.userAgent)) && !window.MSStream
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}
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/** Tests whether the app is running in a Safari environment.
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See https://stackoverflow.com/questions/7944460/detect-safari-browser
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Implemented as a readonly attribute.
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@return {boolean}
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*/
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static get isSafari() {
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return navigator.vendor && navigator.vendor.indexOf('Apple') > -1 && navigator.userAgent && !navigator.userAgent.match('CriOS')
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}
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/**
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* Distincts if the app is running inside electron or not.
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*
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* source: https://discuss.atom.io/t/detect-electron-or-web-page-running/33180/3
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*/
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static get isElectron() {
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return typeof process != 'undefined' && process.versions && process.versions.electron !== undefined
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}
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/** Returns the display resolution. Necessary for retina displays.
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@return {number}
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*/
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static get devicePixelRatio() {
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return window.devicePixelRatio || 1
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}
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/** Returns true if the device is a multi-touch table. This method is currently not universal usable and not sure!
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@return {boolean}
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*/
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static get isMultiTouchTable() {
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return Capabilities.devicePixelRatio > 2 && Capabilities.isMobile === false && /Windows/i.test(Capabilities.userAgent)
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}
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/** Returns true if mouse events are supported
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@return {boolean}
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*/
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static supportsMouseEvents() {
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return typeof(window.MouseEvent) != 'undefined'
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}
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/** Returns true if touch events are supported
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@return {boolean}
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*/
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static supportsTouchEvents() {
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return typeof(window.TouchEvent) != 'undefined'
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}
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/** Returns true if pointer events are supported
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@return {boolean}
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*/
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static supportsPointerEvents() {
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return typeof(window.PointerEvent) != 'undefined'
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}
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/** Returns true if DOM templates are supported
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@return {boolean}
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*/
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static supportsTemplate() {
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return 'content' in document.createElement('template');
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}
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}
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/** Basic tests for Capabilities.
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*/
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export class CapabilitiesTests {
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static testConfirm() {
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let bool = confirm('Please confirm')
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document.getElementById('demo').innerHTML = (bool) ? 'Confirmed' : 'Not confirmed'
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}
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static testPrompt() {
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let person = prompt('Please enter your name', 'Harry Potter')
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if (person != null) {
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demo.innerHTML =
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'Hello ' + person + '! How are you today?'
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}
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}
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static testUserAgent() {
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let agent = 'User-agent: ' + Capabilities.userAgent
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user_agent.innerHTML = agent
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}
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static testDevicePixelRatio() {
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let value = 'Device Pixel Ratio: ' + Capabilities.devicePixelRatio
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device_pixel_ratio.innerHTML = value
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}
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static testMultiTouchTable() {
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let value = 'Is the device a multi-touch table? ' + Capabilities.isMultiTouchTable
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multi_touch_table.innerHTML = value
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}
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static testSupportedEvents() {
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let events = []
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if (Capabilities.supportsMouseEvents()) {
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events.push('MouseEvents')
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}
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if (Capabilities.supportsTouchEvents()) {
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events.push('TouchEvents')
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}
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if (Capabilities.supportsPointerEvents()) {
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events.push('PointerEvents')
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}
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supported_events.innerHTML = 'Supported Events: ' + events.join(', ')
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}
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static testAll() {
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this.testUserAgent()
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this.testDevicePixelRatio()
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this.testMultiTouchTable()
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this.testSupportedEvents()
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}
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}
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/* Optional global variables, needed in DocTests. */
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window.Capabilities = Capabilities
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window.CapabilitiesTests = CapabilitiesTests
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