pinafore/inline-script.js

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2018-04-14 22:50:16 +00:00
// For perf reasons, this script is run inline to quickly set certain styles.
// To allow CSP to work correctly, we also calculate a sha256 hash during
// the build process and write it to inline-script-checksum.json.
import { testHasLocalStorageOnce } from './src/routes/_utils/testStorage'
import { switchToTheme } from './src/routes/_utils/themeEngine'
import { basename } from './src/routes/_api/utils'
window.__themeColors = process.env.THEME_COLORS
const safeParse = str => (typeof str === 'undefined' || str === 'undefined') ? undefined : JSON.parse(str)
const hasLocalStorage = testHasLocalStorageOnce()
const currentInstance = hasLocalStorage && safeParse(localStorage.store_currentInstance)
if (currentInstance) {
// Do prefetch if we're logged in, so we can connect faster to the other origin.
// Note that /api/v1/instance is basically the only URL that doesn't require credentials,
// which is why we can do this. Also we do end up calling this on loading the home page,
// so it's not a wasted request.
let link = document.createElement('link')
link.setAttribute('rel', 'prefetch')
link.setAttribute('href', `${basename(currentInstance)}/api/v1/instance`)
link.setAttribute('crossorigin', 'anonymous')
document.head.appendChild(link)
}
if (currentInstance && localStorage.store_instanceThemes) {
// switch theme ASAP to minimize flash of default theme
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let theme = safeParse(localStorage.store_instanceThemes)[safeParse(localStorage.store_currentInstance)]
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if (theme && theme !== 'default') {
switchToTheme(theme)
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}
}
if (!hasLocalStorage || !currentInstance) {
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// if not logged in, show all these 'hidden-from-ssr' elements
let style = document.createElement('style')
style.textContent = '.hidden-from-ssr { opacity: 1 !important; }'
document.head.appendChild(style)
}
if (hasLocalStorage && localStorage.store_disableCustomScrollbars === 'true') {
// if user has disabled custom scrollbars, remove this style
let theScrollbarStyle = document.getElementById('theScrollbarStyle')
theScrollbarStyle.setAttribute('media', 'only x') // disables the style
}
// hack to make the scrollbars rounded only on macOS
if (/mac/i.test(navigator.platform)) {
document.documentElement.style.setProperty('--scrollbar-border-radius', '50px')
}
// TODO: remove this hack when Safari works with cross-origin window.open()
// in a PWA: https://github.com/nolanlawson/pinafore/issues/45
if (/iP(?:hone|ad|od)/.test(navigator.userAgent)) {
document.head.removeChild(document.getElementById('theManifest'))
}