/*
* Copyright (c) 2014-2015, Wanadev <http://www.wanadev.fr/>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Wanadev nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authored by: Fabien LOISON <http://flozz.fr/>
*/
/**
* PhotonUI - Javascript Web User Interface.
*
* @module PhotonUI
* @submodule NonVisual
* @namespace photonui
*/
var Base = require("../base.js");
/**
* Open files from the standard "FileOpen" dialog and drag & drop.
*
* wEvents:
*
* * file-open:
* - description: File selected or dropped.
* - callback: function(widget, fileBlob, x, y) //(x=y=undefined if using a dialog)
*
* @class FileManager
* @constructor
* @extends photonui.Base
* @param {Object} params An object that can contain any property of the widget (optional).
*/
var FileManager = Base.$extend({
// Constructor
__init__: function (params) {
this.__fileField = document.createElement("input");
this.__fileField.type = "file";
this.__fileField.addEventListener("change", this.__onFileSelected.bind(this), false);
this.__fileField.style.position = "fixed";
this.__fileField.style.top = 0;
this.__fileField.style.left = 0;
this.__fileField.style.opacity = 0;
this.__fileField.style.display = "none";
document.getElementsByTagName("body")[0].appendChild(this.__fileField);
this._acceptedMimes = [];
this._acceptedExts = [];
this._registerWEvents(["file-open"]);
this.$super(params);
},
//////////////////////////////////////////
// Properties and Accessors //
//////////////////////////////////////////
// ====== Public properties ======
/**
* List of the accepted mime types.
*
* @property acceptedMimes
* @type Array
* @default []
*/
_acceptedMimes: [],
getAcceptedMimes: function () {
return this._acceptedMimes;
},
setAcceptedMimes: function (mimes) {
this._acceptedMimes = mimes;
this._updateAccepted();
},
/**
* List of the accepted file extentions.
*
* @property acceptedExts
* @type Array
* @default []
*/
_acceptedExts: [],
getAcceptedExts: function () {
return this._acceptedExts;
},
setAcceptedExts: function (exts) {
this._acceptedExts = exts;
this._updateAccepted();
},
/**
* Element that accepts file drop (`null` disable d&d support).
*
* @property dropZone
* @type HTMLElement
* @default null
*/
_dropZone: null,
getDropZone: function () {
return this._dropZone;
},
setDropZone: function (element) {
// Unbind
if (this._dropZone) {
this._unbindEvent("document-dragover");
this._unbindEvent("document-drop");
this._unbindEvent("element-dragover");
this._unbindEvent("element-drop");
}
this._dropZone = element;
// Bind
if (element) {
this._bindEvent("document-dragover", document, "dragover", function (event) {
event.preventDefault();
});
this._bindEvent("document-drop", document, "drop", function (event) {
event.preventDefault();
});
this._bindEvent("element-dragover", element, "dragover", function (event) {});
this._bindEvent("element-drop", element, "drop", this.__onFileDropped.bind(this));
}
},
/**
* Allow multiselect in FileOpen dialog.
*
* @property multiselect
* @type Boolean
* @default false
*/
_multiselect: false,
getMultiselect: function () {
return this._multiselect;
},
setMultiselect: function (multiselect) {
this._multiselect = multiselect;
if (multiselect) {
this.__fileField.multiple = "true";
} else {
delete this.__fileField.multiple;
}
},
// ====== Private properties ======
/**
* The file field for opening the file dialog.
*
* @property __fileField
* @private
* @type HTMLElement
*/
__fileField: null,
//////////////////////////////////////////
// Methods //
//////////////////////////////////////////
// ====== Public methods ======
/**
* Open the FileOpen dialog to allow user to browse its HDD for a file.
*
* @method open
*/
open: function () {
this.__fileField.style.display = "inline-block";
this.__fileField.value = null;
this.__fileField.focus();
this.__fileField.click();
this.__fileField.style.display = "none";
},
/**
* Destroy the class.
*
* @method destroy
*/
destroy: function () {
document.getElementsByTagName("body")[0].removeChild(this.__fileField);
this.$super();
},
// ====== Private methods ======
/**
* Update accepted mimes/extentions.
*
* @method _updateAccepted
* @private
*/
_updateAccepted: function () {
var result = [];
for (var i = 0 ; i < this.acceptedExts.length ; i++) {
result.push("." + this.acceptedExts[i].toLocaleLowerCase());
}
result = result.concat(this.acceptedMimes);
this.__fileField.accept = result.join(",");
},
/**
* Check file and call callbacks.
*
* @method _openFile
* @private
* @param {File} file
* @param {Number} x The x postition of the mouse (d&d only).
* @param {Number} y The y postition of the mouse (d&d only).
*/
_openFile: function (file, x, y) {
var match = false;
// Validate mime
for (var m = 0 ; m < this.acceptedMimes.length ; m++) {
if (file.type == this.acceptedMimes[m]) {
match = true;
break;
}
}
// Validate ext
if (!match) {
var ext = file.name.split(".").splice(-1);
for (var e = 0 ; e < this.acceptedExts.length ; e++) {
if (ext == this.acceptedExts[e]) {
match = true;
break;
}
}
}
if (match || this.acceptedMimes.length === 0 && this.acceptedExts.length === 0) {
this._callCallbacks("file-open", [file, x, y]);
}
},
//////////////////////////////////////////
// Internal Events Callbacks //
//////////////////////////////////////////
/**
* @method __onFileDropped
* @private
* @param event
*/
__onFileDropped: function (event) {
for (var i in event.dataTransfer.files) {
var file = event.dataTransfer.files[i];
if (file instanceof File) {
this._openFile(file, event.pageX, event.pageY);
}
}
},
/**
* @method __onFileSelected
* @private
* @param event
*/
__onFileSelected: function (event) {
for (var i in this.__fileField.files) {
var file = this.__fileField.files[i];
if (file instanceof File) {
this._openFile(file);
}
}
},
/**
* Called when the locale is changed.
*
* @method __onLocaleChanged
* @private
*/
__onLocaleChanged: function () {
// pass
}
});
module.exports = FileManager;
