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dfu-web/webdfu-gh-pages/dfu-util/FileSaver.js 5.8 KB
6663b6c9   adorian   projet complet av...
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  /* FileSaver.js
   * A saveAs() FileSaver implementation.
   * 1.3.2
   * 2016-06-16 18:25:19
   *
   * By Eli Grey, http://eligrey.com
   * License: MIT
   *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
   */
  
  /*global self */
  /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
  
  /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
  
  var saveAs = saveAs || (function(view) {
  	"use strict";
  	// IE <10 is explicitly unsupported
  	if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) {
  		return;
  	}
  	var
  		  doc = view.document
  		  // only get URL when necessary in case Blob.js hasn't overridden it yet
  		, get_URL = function() {
  			return view.URL || view.webkitURL || view;
  		}
  		, save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
  		, can_use_save_link = "download" in save_link
  		, click = function(node) {
  			var event = new MouseEvent("click");
  			node.dispatchEvent(event);
  		}
  		, is_safari = /constructor/i.test(view.HTMLElement)
  		, is_chrome_ios =/CriOS\/[\d]+/.test(navigator.userAgent)
  		, throw_outside = function(ex) {
  			(view.setImmediate || view.setTimeout)(function() {
  				throw ex;
  			}, 0);
  		}
  		, force_saveable_type = "application/octet-stream"
  		// the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to
  		, arbitrary_revoke_timeout = 1000 * 40 // in ms
  		, revoke = function(file) {
  			var revoker = function() {
  				if (typeof file === "string") { // file is an object URL
  					get_URL().revokeObjectURL(file);
  				} else { // file is a File
  					file.remove();
  				}
  			};
  			setTimeout(revoker, arbitrary_revoke_timeout);
  		}
  		, dispatch = function(filesaver, event_types, event) {
  			event_types = [].concat(event_types);
  			var i = event_types.length;
  			while (i--) {
  				var listener = filesaver["on" + event_types[i]];
  				if (typeof listener === "function") {
  					try {
  						listener.call(filesaver, event || filesaver);
  					} catch (ex) {
  						throw_outside(ex);
  					}
  				}
  			}
  		}
  		, auto_bom = function(blob) {
  			// prepend BOM for UTF-8 XML and text/* types (including HTML)
  			// note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
  			if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
  				return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type});
  			}
  			return blob;
  		}
  		, FileSaver = function(blob, name, no_auto_bom) {
  			if (!no_auto_bom) {
  				blob = auto_bom(blob);
  			}
  			// First try a.download, then web filesystem, then object URLs
  			var
  				  filesaver = this
  				, type = blob.type
  				, force = type === force_saveable_type
  				, object_url
  				, dispatch_all = function() {
  					dispatch(filesaver, "writestart progress write writeend".split(" "));
  				}
  				// on any filesys errors revert to saving with object URLs
  				, fs_error = function() {
  					if ((is_chrome_ios || (force && is_safari)) && view.FileReader) {
  						// Safari doesn't allow downloading of blob urls
  						var reader = new FileReader();
  						reader.onloadend = function() {
  							var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, 'data:attachment/file;');
  							var popup = view.open(url, '_blank');
  							if(!popup) view.location.href = url;
  							url=undefined; // release reference before dispatching
  							filesaver.readyState = filesaver.DONE;
  							dispatch_all();
  						};
  						reader.readAsDataURL(blob);
  						filesaver.readyState = filesaver.INIT;
  						return;
  					}
  					// don't create more object URLs than needed
  					if (!object_url) {
  						object_url = get_URL().createObjectURL(blob);
  					}
  					if (force) {
  						view.location.href = object_url;
  					} else {
  						var opened = view.open(object_url, "_blank");
  						if (!opened) {
  							// Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
  							view.location.href = object_url;
  						}
  					}
  					filesaver.readyState = filesaver.DONE;
  					dispatch_all();
  					revoke(object_url);
  				}
  			;
  			filesaver.readyState = filesaver.INIT;
  
  			if (can_use_save_link) {
  				object_url = get_URL().createObjectURL(blob);
  				setTimeout(function() {
  					save_link.href = object_url;
  					save_link.download = name;
  					click(save_link);
  					dispatch_all();
  					revoke(object_url);
  					filesaver.readyState = filesaver.DONE;
  				});
  				return;
  			}
  
  			fs_error();
  		}
  		, FS_proto = FileSaver.prototype
  		, saveAs = function(blob, name, no_auto_bom) {
  			return new FileSaver(blob, name || blob.name || "download", no_auto_bom);
  		}
  	;
  	// IE 10+ (native saveAs)
  	if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
  		return function(blob, name, no_auto_bom) {
  			name = name || blob.name || "download";
  
  			if (!no_auto_bom) {
  				blob = auto_bom(blob);
  			}
  			return navigator.msSaveOrOpenBlob(blob, name);
  		};
  	}
  
  	FS_proto.abort = function(){};
  	FS_proto.readyState = FS_proto.INIT = 0;
  	FS_proto.WRITING = 1;
  	FS_proto.DONE = 2;
  
  	FS_proto.error =
  	FS_proto.onwritestart =
  	FS_proto.onprogress =
  	FS_proto.onwrite =
  	FS_proto.onabort =
  	FS_proto.onerror =
  	FS_proto.onwriteend =
  		null;
  
  	return saveAs;
  }(
  	   typeof self !== "undefined" && self
  	|| typeof window !== "undefined" && window
  	|| this.content
  ));
  // `self` is undefined in Firefox for Android content script context
  // while `this` is nsIContentFrameMessageManager
  // with an attribute `content` that corresponds to the window
  
  if (typeof module !== "undefined" && module.exports) {
    module.exports.saveAs = saveAs;
  } else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) {
    define([], function() {
      return saveAs;
    });
  }