67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
'use strict';
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const views = require('../util/views.js');
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class FileDropperControl {
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constructor() {
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this.template = views.getTemplate('file-dropper');
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}
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render(ctx) {
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const target = ctx.target;
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const source = this.template({
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allowMultiple: ctx.allowMultiple,
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id: 'file-' + Math.random().toString(36).substring(7),
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});
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const dropper = source.querySelector('.file-dropper');
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const fileInput = source.querySelector('input');
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fileInput.style.display = 'none';
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fileInput.multiple = ctx.allowMultiple || false;
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const resolve = files => {
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files = Array.from(files);
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if (ctx.lock) {
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dropper.innerText = files.map(file => file.name).join(', ');
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}
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ctx.resolve(files);
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};
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let counter = 0;
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dropper.addEventListener('dragenter', e => {
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dropper.classList.add('active');
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counter++;
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});
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dropper.addEventListener('dragleave', e => {
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counter--;
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if (counter === 0) {
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dropper.classList.remove('active');
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}
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});
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dropper.addEventListener('dragover', e => {
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e.preventDefault();
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});
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dropper.addEventListener('drop', e => {
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dropper.classList.remove('active');
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e.preventDefault();
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if (!e.dataTransfer.files.length) {
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window.alert('Only files are supported.');
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}
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if (!ctx.allowMultiple && e.dataTransfer.files.length > 1) {
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window.alert('Cannot select multiple files.');
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}
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resolve(e.dataTransfer.files);
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});
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fileInput.addEventListener('change', e => {
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resolve(e.target.files);
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});
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views.showView(target, source);
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}
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}
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module.exports = FileDropperControl;
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