iwmlib/lib/capabilities.js

146 lines
4.2 KiB
JavaScript

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