react-dropzone
Version:
Simple HTML5 drag-drop zone with React.js
163 lines (134 loc) • 7.18 kB
JavaScript
function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import accepts from 'attr-accept'; // Error codes
export var FILE_INVALID_TYPE = 'file-invalid-type';
export var FILE_TOO_LARGE = 'file-too-large';
export var FILE_TOO_SMALL = 'file-too-small';
export var TOO_MANY_FILES = 'too-many-files'; // File Errors
export var getInvalidTypeRejectionErr = function getInvalidTypeRejectionErr(accept) {
accept = Array.isArray(accept) && accept.length === 1 ? accept[0] : accept;
var messageSuffix = Array.isArray(accept) ? "one of ".concat(accept.join(', ')) : accept;
return {
code: FILE_INVALID_TYPE,
message: "File type must be ".concat(messageSuffix)
};
};
export var getTooLargeRejectionErr = function getTooLargeRejectionErr(maxSize) {
return {
code: FILE_TOO_LARGE,
message: "File is larger than ".concat(maxSize, " bytes")
};
};
export var getTooSmallRejectionErr = function getTooSmallRejectionErr(minSize) {
return {
code: FILE_TOO_SMALL,
message: "File is smaller than ".concat(minSize, " bytes")
};
};
export var TOO_MANY_FILES_REJECTION = {
code: TOO_MANY_FILES,
message: 'Too many files'
}; // Firefox versions prior to 53 return a bogus MIME type for every file drag, so dragovers with
// that MIME type will always be accepted
export function fileAccepted(file, accept) {
var isAcceptable = file.type === 'application/x-moz-file' || accepts(file, accept);
return [isAcceptable, isAcceptable ? null : getInvalidTypeRejectionErr(accept)];
}
export function fileMatchSize(file, minSize, maxSize) {
if (isDefined(file.size)) {
if (isDefined(minSize) && isDefined(maxSize)) {
if (file.size > maxSize) return [false, getTooLargeRejectionErr(maxSize)];
if (file.size < minSize) return [false, getTooSmallRejectionErr(minSize)];
} else if (isDefined(minSize) && file.size < minSize) return [false, getTooSmallRejectionErr(minSize)];else if (isDefined(maxSize) && file.size > maxSize) return [false, getTooLargeRejectionErr(maxSize)];
}
return [true, null];
}
function isDefined(value) {
return value !== undefined && value !== null;
}
export function allFilesAccepted(_ref) {
var files = _ref.files,
accept = _ref.accept,
minSize = _ref.minSize,
maxSize = _ref.maxSize,
multiple = _ref.multiple,
maxFiles = _ref.maxFiles;
if (!multiple && files.length > 1 || multiple && maxFiles >= 1 && files.length > maxFiles) {
return false;
}
return files.every(function (file) {
var _fileAccepted = fileAccepted(file, accept),
_fileAccepted2 = _slicedToArray(_fileAccepted, 1),
accepted = _fileAccepted2[0];
var _fileMatchSize = fileMatchSize(file, minSize, maxSize),
_fileMatchSize2 = _slicedToArray(_fileMatchSize, 1),
sizeMatch = _fileMatchSize2[0];
return accepted && sizeMatch;
});
} // React's synthetic events has event.isPropagationStopped,
// but to remain compatibility with other libs (Preact) fall back
// to check event.cancelBubble
export function isPropagationStopped(event) {
if (typeof event.isPropagationStopped === 'function') {
return event.isPropagationStopped();
} else if (typeof event.cancelBubble !== 'undefined') {
return event.cancelBubble;
}
return false;
}
export function isEvtWithFiles(event) {
if (!event.dataTransfer) {
return !!event.target && !!event.target.files;
} // https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer/types
// https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/Recommended_drag_types#file
return Array.prototype.some.call(event.dataTransfer.types, function (type) {
return type === 'Files' || type === 'application/x-moz-file';
});
}
export function isKindFile(item) {
return _typeof(item) === 'object' && item !== null && item.kind === 'file';
} // allow the entire document to be a drag target
export function onDocumentDragOver(event) {
event.preventDefault();
}
function isIe(userAgent) {
return userAgent.indexOf('MSIE') !== -1 || userAgent.indexOf('Trident/') !== -1;
}
function isEdge(userAgent) {
return userAgent.indexOf('Edge/') !== -1;
}
export function isIeOrEdge() {
var userAgent = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : window.navigator.userAgent;
return isIe(userAgent) || isEdge(userAgent);
}
/**
* This is intended to be used to compose event handlers
* They are executed in order until one of them calls `event.isPropagationStopped()`.
* Note that the check is done on the first invoke too,
* meaning that if propagation was stopped before invoking the fns,
* no handlers will be executed.
*
* @param {Function} fns the event hanlder functions
* @return {Function} the event handler to add to an element
*/
export function composeEventHandlers() {
for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {
fns[_key] = arguments[_key];
}
return function (event) {
for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
args[_key2 - 1] = arguments[_key2];
}
return fns.some(function (fn) {
if (!isPropagationStopped(event) && fn) {
fn.apply(void 0, [event].concat(args));
}
return isPropagationStopped(event);
});
};
}