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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('extensions', function() {
'use strict';
/** @implements cr.ui.DragWrapperDelegate */
class DragAndDropHandler {
/**
* @param {boolean} dragEnabled
* @param {!EventTarget} target
*/
constructor(dragEnabled, target) {
this.dragEnabled = dragEnabled;
/** @private {!EventTarget} */
this.eventTarget_ = target;
}
/** @override */
shouldAcceptDrag(e) {
// External Extension installation can be disabled globally, e.g. while a
// different overlay is already showing.
if (!this.dragEnabled) {
return false;
}
// We can't access filenames during the 'dragenter' event, so we have to
// wait until 'drop' to decide whether to do something with the file or
// not.
// See: http://www.w3.org/TR/2011/WD-html5-20110113/dnd.html#concept-dnd-p
return !!e.dataTransfer.types &&
e.dataTransfer.types.indexOf('Files') > -1;
}
/** @override */
doDragEnter() {
extensions.Service.getInstance().notifyDragInstallInProgress();
this.eventTarget_.dispatchEvent(
new CustomEvent('extension-drag-started'));
}
/** @override */
doDragLeave() {
this.fireDragEnded_();
}
/** @override */
doDragOver(e) {
e.preventDefault();
}
/** @override */
doDrop(e) {
this.fireDragEnded_();
if (e.dataTransfer.files.length != 1) {
return;
}
let handled = false;
// Files lack a check if they're a directory, but we can find out through
// its item entry.
const item = e.dataTransfer.items[0];
if (item.kind === 'file' && item.webkitGetAsEntry().isDirectory) {
handled = true;
this.handleDirectoryDrop_();
} else if (/\.(crx|user\.js|zip)$/i.test(e.dataTransfer.files[0].name)) {
// Only process files that look like extensions. Other files should
// navigate the browser normally.
handled = true;
this.handleFileDrop_();
}
if (handled) {
e.preventDefault();
}
}
/**
* Handles a dropped file.
* @private
*/
handleFileDrop_() {
extensions.Service.getInstance().installDroppedFile();
}
/**
* Handles a dropped directory.
* @private
*/
handleDirectoryDrop_() {
extensions.Service.getInstance().loadUnpackedFromDrag().catch(
loadError => {
this.eventTarget_.dispatchEvent(new CustomEvent(
'drag-and-drop-load-error', {detail: loadError}));
});
}
/** @private */
fireDragEnded_() {
this.eventTarget_.dispatchEvent(new CustomEvent('extension-drag-ended'));
}
}
return {
DragAndDropHandler: DragAndDropHandler,
};
});
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