#199 - Removes the file-drop custom element

+ Removes the custom element from the project
+ Replaces it with the externally maintined custom element
This commit is contained in:
Paul Kinlan
2018-10-13 20:06:58 +00:00
committed by Jake Archibald
parent 76188df0d3
commit f4c82ced97
6 changed files with 56 additions and 225 deletions

97
package-lock.json generated
View File

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View File

@ -65,6 +65,7 @@
"linkstate": "^1.1.1",
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View File

@ -1,153 +0,0 @@
import { bind } from '../../../../lib/initial-util';
import './styles.css';
// tslint:disable-next-line:max-line-length
function firstMatchingItem(list: DataTransferItemList, acceptVal: string): DataTransferItem | undefined {
// Split accepts values by ',' then by '/'. Trim everything & lowercase.
const accepts = acceptVal.toLowerCase().split(',').map((accept) => {
return accept.trim().split('/').map(part => part.trim());
}).filter(acceptParts => acceptParts.length === 2); // Filter invalid values
return Array.from(list).find((item) => {
if (item.kind !== 'file') return false;
// 'Parse' the type.
const [typeMain, typeSub] = item.type.toLowerCase().split('/').map(s => s.trim());
for (const [acceptMain, acceptSub] of accepts) {
// Look for an exact match, or a partial match if * is accepted, eg image/*.
if (typeMain === acceptMain && (acceptSub === '*' || typeSub === acceptSub)) {
return true;
}
}
return false;
});
}
function getFileData(data: DataTransfer, accept: string): File | undefined {
const dragDataItem = firstMatchingItem(data.items, accept);
if (!dragDataItem) return;
return dragDataItem.getAsFile() || undefined;
}
interface FileDropEventInit extends EventInit {
action: FileDropAccept;
file: File;
}
type FileDropAccept = 'drop' | 'paste';
// Safari and Edge don't quite support extending Event, this works around it.
function fixExtendedEvent(instance: Event, type: Function) {
if (!(instance instanceof type)) {
Object.setPrototypeOf(instance, type.prototype);
}
}
export class FileDropEvent extends Event {
private _action: FileDropAccept;
private _file: File;
constructor(typeArg: string, eventInitDict: FileDropEventInit) {
super(typeArg, eventInitDict);
fixExtendedEvent(this, FileDropEvent);
this._file = eventInitDict.file;
this._action = eventInitDict.action;
}
get action() {
return this._action;
}
get file() {
return this._file;
}
}
/*
Example Usage.
<file-drop
accept='image/*'
class='drop-valid|drop-invalid'
>
[everything in here is a drop target.]
</file-drop>
dropElement.addEventListner('dropfile', (event) => console.log(event.detail))
*/
export class FileDrop extends HTMLElement {
private _dragEnterCount = 0;
constructor() {
super();
this.addEventListener('dragover', event => event.preventDefault());
this.addEventListener('drop', this._onDrop);
this.addEventListener('dragenter', this._onDragEnter);
this.addEventListener('dragend', () => this._reset());
this.addEventListener('dragleave', this._onDragLeave);
this.addEventListener('paste', this._onPaste);
}
get accept() {
return this.getAttribute('accept') || '';
}
set accept(val: string) {
this.setAttribute('accept', val);
}
@bind
private _onDragEnter(event: DragEvent) {
this._dragEnterCount += 1;
if (this._dragEnterCount > 1) return;
// We don't have data, attempt to get it and if it matches, set the correct state.
const validDrop: boolean = event.dataTransfer.items.length ?
!!firstMatchingItem(event.dataTransfer.items, this.accept) :
// Safari doesn't give file information on drag enter, so the best we can do is return valid.
true;
if (validDrop) {
this.classList.add('drop-valid');
} else {
this.classList.add('drop-invalid');
}
}
@bind
private _onDragLeave() {
this._dragEnterCount -= 1;
if (this._dragEnterCount === 0) {
this._reset();
}
}
@bind
private _onDrop(event: DragEvent) {
event.preventDefault();
this._reset();
const action = 'drop';
const file = getFileData(event.dataTransfer, this.accept);
if (file === undefined) return;
this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
}
@bind
private _onPaste(event: ClipboardEvent) {
const action = 'paste';
const file = getFileData(event.clipboardData, this.accept);
if (file === undefined) return;
this.dispatchEvent(new FileDropEvent('filedrop', { action, file }));
}
private _reset() {
this._dragEnterCount = 0;
this.classList.remove('drop-valid');
this.classList.remove('drop-invalid');
}
}
customElements.define('file-drop', FileDrop);

View File

@ -1,19 +0,0 @@
import { FileDropEvent, FileDrop } from '.';
declare global {
interface HTMLElementEventMap {
'filedrop': FileDropEvent;
}
namespace JSX {
interface IntrinsicElements {
'file-drop': FileDropAttributes;
}
interface FileDropAttributes extends HTMLAttributes {
accept?: string;
onfiledrop?: ((this: FileDrop, ev: FileDropEvent) => any) | null;
}
}
}

View File

@ -1,3 +0,0 @@
file-drop {
display: block;
}

View File

@ -2,8 +2,8 @@ import { h, Component } from 'preact';
import { bind, linkRef, Fileish } from '../../lib/initial-util';
import * as style from './style.scss';
import { FileDropEvent } from './custom-els/FileDrop';
import './custom-els/FileDrop';
import * as FileDropElement from 'file-drop-element';
import 'file-drop-element';
import SnackBarElement, { SnackOptions } from '../../lib/SnackBar';
import '../../lib/SnackBar';
import Intro from '../intro';
@ -54,7 +54,7 @@ export default class App extends Component<Props, State> {
}
@bind
private onFileDrop(event: FileDropEvent) {
private onFileDrop(event: FileDropElement.FileDropEvent) {
const { file } = event;
if (!file) return;
this.setState({ file });