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export class SwitcherControl {
constructor(styles, defaultStyle, beforeSwitch, afterSwitch) {
this.styles = styles;
this.defaultStyle = defaultStyle;
this.beforeSwitch = beforeSwitch;
this.afterSwitch = afterSwitch;
this.onDocumentClick = this.onDocumentClick.bind(this);
this.variables = {};
}
getDefaultPosition() {
return 'top-right';
}
setVariable(key, value) {
this.variables[key] = value;
}
onAdd(map) {
this.map = map;
this.controlContainer = document.createElement('div');
this.controlContainer.classList.add('maplibregl-ctrl');
this.controlContainer.classList.add('maplibregl-ctrl-group');
this.mapStyleContainer = document.createElement('div');
this.styleButton = document.createElement('button');
this.styleButton.type = 'button';
this.mapStyleContainer.classList.add('maplibregl-style-list');
for (const style of this.styles) {
const styleElement = document.createElement('button');
styleElement.type = 'button';
styleElement.innerText = style.title;
styleElement.classList.add(style.title.replace(/[^a-z0-9-]/gi, '_'));
styleElement.dataset.uri = JSON.stringify(style.uri);
styleElement.addEventListener('click', (event) => {
const { srcElement } = event;
if (srcElement.classList.contains('active')) {
return;
}
this.beforeSwitch();
let uri = JSON.parse(srcElement.dataset.uri);
if (typeof uri === 'string') {
Object.entries(this.variables).forEach(([key, value]) => uri = uri.replaceAll(`$\{${key}}`, value));
}
this.map.setStyle(uri);
this.afterSwitch();
this.mapStyleContainer.style.display = 'none';
this.styleButton.style.display = 'block';
const elms = this.mapStyleContainer.getElementsByClassName('active');
while (elms[0]) {
elms[0].classList.remove('active');
}
srcElement.classList.add('active');
});
if (style.title === this.defaultStyle) {
styleElement.classList.add('active');
}
this.mapStyleContainer.appendChild(styleElement);
}
this.styleButton.classList.add('maplibregl-ctrl-icon');
this.styleButton.classList.add('maplibregl-style-switcher');
this.styleButton.addEventListener('click', () => {
this.styleButton.style.display = 'none';
this.mapStyleContainer.style.display = 'block';
});
document.addEventListener('click', this.onDocumentClick);
this.controlContainer.appendChild(this.styleButton);
this.controlContainer.appendChild(this.mapStyleContainer);
return this.controlContainer;
}
onRemove() {
if (!this.controlContainer || !this.controlContainer.parentNode || !this.map || !this.styleButton) {
return;
}
this.styleButton.removeEventListener('click', this.onDocumentClick);
this.controlContainer.parentNode.removeChild(this.controlContainer);
document.removeEventListener('click', this.onDocumentClick);
this.map = undefined;
}
onDocumentClick(event) {
if (this.controlContainer && !this.controlContainer.contains(event.target) && this.mapStyleContainer && this.styleButton) {
this.mapStyleContainer.style.display = 'none';
this.styleButton.style.display = 'block';
}
}
}
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