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metamask-extension/ui/app/helpers/utils/switch-direction.js
Nick Doiron d589d2dec0 Right-to-left CSS (using module for conversion) (#7072)
* Create RTL stylesheets using `gulp-rtl`

* Handle RTL stylesheet special cases

Certain blocks of Sass  were set to bypass "rtlcss" using ignore
comments. Certain icons had to be flipped 180 degrees.

* Switch stylesheets when locale changes

A second stylesheet has been added to each HTML page for use with
right-to-left locales. It is disabled by default. It is enabled on
startup if a RTL locale is set, and when switching to a RTL locale.
Similarly the LTR stylesheet is disabled when a RTL locale is used.

Unfortunately there is an unpleasant flash of unstyled content when
switching between a LTR and a RTL locale. There is also a slightly
longer page load time when using a RTL locale (<1s difference). We
couldn't think of an easy way to avoid these problems.

* Set `dir="auto"` as default on `TextFields`
2019-09-03 14:47:54 -03:00

31 lines
901 B
JavaScript

/**
* Switch the CSS stylesheet used between 'rtl' and 'ltr'
* @param {('ltr' | 'rtl')} direction Text direction, either left-to-right (ltr) or right-to-left (rtl)
*/
const switchDirection = async (direction) => {
if (direction === 'auto') {
direction = 'ltr'
}
let updatedLink
Array.from(document.getElementsByTagName('link'))
.filter(link => link.rel === 'stylesheet')
.forEach(link => {
if (link.title === direction && link.disabled) {
link.disabled = false
updatedLink = link
} else if (link.title !== direction && !link.disabled) {
link.disabled = true
}
})
if (updatedLink) {
return new Promise((resolve, reject) => {
updatedLink.onload = () => {
resolve()
}
updatedLink.onerror = () => reject(new Error(`Failed to load '${direction}' stylesheet`))
})
}
}
export default switchDirection