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'use strict';
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @typechecks
*/
var PhotosMimeType = require('./PhotosMimeType');
var createArrayFromMixed = require('./createArrayFromMixed');
var emptyFunction = require('./emptyFunction');
var CR_LF_REGEX = new RegExp('\r\n', 'g');
var LF_ONLY = '\n';
var RICH_TEXT_TYPES = {
'text/rtf': 1,
'text/html': 1
};
/**
* If DataTransferItem is a file then return the Blob of data.
*
* @param {object} item
* @return {?blob}
*/
function getFileFromDataTransfer(item) {
if (item.kind == 'file') {
return item.getAsFile();
}
}
var DataTransfer = function () {
/**
* @param {object} data
*/
function DataTransfer(data) {
_classCallCheck(this, DataTransfer);
this.data = data;
// Types could be DOMStringList or array
this.types = data.types ? createArrayFromMixed(data.types) : [];
}
/**
* Is this likely to be a rich text data transfer?
*
* @return {boolean}
*/
DataTransfer.prototype.isRichText = function isRichText() {
// If HTML is available, treat this data as rich text. This way, we avoid
// using a pasted image if it is packaged with HTML -- this may occur with
// pastes from MS Word, for example. However this is only rich text if
// there's accompanying text.
if (this.getHTML() && this.getText()) {
return true;
}
// When an image is copied from a preview window, you end up with two
// DataTransferItems one of which is a file's metadata as text. Skip those.
if (this.isImage()) {
return false;
}
return this.types.some(function (type) {
return RICH_TEXT_TYPES[type];
});
};
/**
* Get raw text.
*
* @return {?string}
*/
DataTransfer.prototype.getText = function getText() {
var text;
if (this.data.getData) {
if (!this.types.length) {
text = this.data.getData('Text');
} else if (this.types.indexOf('text/plain') != -1) {
text = this.data.getData('text/plain');
}
}
return text ? text.replace(CR_LF_REGEX, LF_ONLY) : null;
};
/**
* Get HTML paste data
*
* @return {?string}
*/
DataTransfer.prototype.getHTML = function getHTML() {
if (this.data.getData) {
if (!this.types.length) {
return this.data.getData('Text');
} else if (this.types.indexOf('text/html') != -1) {
return this.data.getData('text/html');
}
}
};
/**
* Is this a link data transfer?
*
* @return {boolean}
*/
DataTransfer.prototype.isLink = function isLink() {
return this.types.some(function (type) {
return type.indexOf('Url') != -1 || type.indexOf('text/uri-list') != -1 || type.indexOf('text/x-moz-url');
});
};
/**
* Get a link url.
*
* @return {?string}
*/
DataTransfer.prototype.getLink = function getLink() {
if (this.data.getData) {
if (this.types.indexOf('text/x-moz-url') != -1) {
var url = this.data.getData('text/x-moz-url').split('\n');
return url[0];
}
return this.types.indexOf('text/uri-list') != -1 ? this.data.getData('text/uri-list') : this.data.getData('url');
}
return null;
};
/**
* Is this an image data transfer?
*
* @return {boolean}
*/
DataTransfer.prototype.isImage = function isImage() {
var isImage = this.types.some(function (type) {
// Firefox will have a type of application/x-moz-file for images during
// dragging
return type.indexOf('application/x-moz-file') != -1;
});
if (isImage) {
return true;
}
var items = this.getFiles();
for (var i = 0; i < items.length; i++) {
var type = items[i].type;
if (!PhotosMimeType.isImage(type)) {
return false;
}
}
return true;
};
DataTransfer.prototype.getCount = function getCount() {
if (this.data.hasOwnProperty('items')) {
return this.data.items.length;
} else if (this.data.hasOwnProperty('mozItemCount')) {
return this.data.mozItemCount;
} else if (this.data.files) {
return this.data.files.length;
}
return null;
};
/**
* Get files.
*
* @return {array}
*/
DataTransfer.prototype.getFiles = function getFiles() {
if (this.data.items) {
// createArrayFromMixed doesn't properly handle DataTransferItemLists.
return Array.prototype.slice.call(this.data.items).map(getFileFromDataTransfer).filter(emptyFunction.thatReturnsArgument);
} else if (this.data.files) {
return Array.prototype.slice.call(this.data.files);
} else {
return [];
}
};
/**
* Are there any files to fetch?
*
* @return {boolean}
*/
DataTransfer.prototype.hasFiles = function hasFiles() {
return this.getFiles().length > 0;
};
return DataTransfer;
}();
module.exports = DataTransfer;
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