mirror of
https://github.com/hyperknot/openfreemap.git
synced 2026-05-21 22:12:15 +00:00
77 lines
2.0 KiB
JavaScript
77 lines
2.0 KiB
JavaScript
const map = new maplibregl.Map({
|
|
container: 'map',
|
|
style: 'https://tiles.openfreemap.org/styles/liberty',
|
|
center: [0, 0],
|
|
zoom: 2,
|
|
})
|
|
|
|
function modifyStyle({ style, langCode }) {
|
|
if (!langCode) {
|
|
langCode = 'en'
|
|
}
|
|
|
|
for (const layer of style.layers) {
|
|
if (layer.source !== 'openmaptiles') continue
|
|
if (!layer.layout) continue
|
|
|
|
const textField = layer.layout['text-field']
|
|
if (!textField) continue
|
|
|
|
// highway numbers, etc. - skip ref-only fields
|
|
if (JSON.stringify(textField) === JSON.stringify(['to-string', ['get', 'ref']])) continue
|
|
|
|
const id = layer.id
|
|
|
|
let separator
|
|
if (id.includes('line') || id.includes('highway')) {
|
|
separator = ' '
|
|
} else {
|
|
separator = '\n'
|
|
}
|
|
|
|
// the default is "en", not "int"
|
|
let parts
|
|
if (langCode === 'int') {
|
|
parts = [['get', 'name']]
|
|
} else {
|
|
parts = [
|
|
['get', `name_${langCode}`],
|
|
['get', `name:${langCode}`],
|
|
['get', 'name'],
|
|
]
|
|
}
|
|
|
|
layer.layout['text-field'] = [
|
|
'case',
|
|
['has', 'name:nonlatin'],
|
|
['concat', ['get', 'name:latin'], separator, ['get', 'name:nonlatin']],
|
|
['coalesce', ...parts],
|
|
]
|
|
}
|
|
}
|
|
|
|
function applyLanguage() {
|
|
const hash = window.location.hash.substring(1); // Remove the '#'
|
|
const langCode = hash || null;
|
|
|
|
const style = map.getStyle()
|
|
modifyStyle({ style, langCode })
|
|
map.setStyle(style, { diff: false })
|
|
}
|
|
|
|
map.on('load', () => {
|
|
// Add default hash if not present
|
|
if (!window.location.hash) {
|
|
alert('To change the map language, modify the language code in the URL.\n\nExamples:\n• #en → English\n• #de → German\n• #fr → French\n• #es → Spanish\n• #int → International names\n\nDefault language set to: en (English)')
|
|
window.location.hash = '#es'
|
|
// The hashchange event will trigger applyLanguage()
|
|
} else {
|
|
applyLanguage()
|
|
}
|
|
})
|
|
|
|
// Listen for hash changes in URL
|
|
window.addEventListener('hashchange', () => {
|
|
applyLanguage()
|
|
})
|