text: ﻿/* FileSaver.js
   *  A saveAs() & saveTextAs() FileSaver implementation.
   *  2014-06-24
   *
   *  Modify by Brian Chen
   *  Author: Eli Grey, http://eligrey.com
   *  License: X11/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
    // IE 10+ (native saveAs)
    || (typeof navigator !== "undefined" &&
        navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
    // Everyone else
    || (function (view) {
        "use strict";
        // IE <10 is explicitly unsupported
        if (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 = !view.externalHost && "download" in save_link
            , click = function (node) {
                var event = doc.createEvent("MouseEvents");
                event.initMouseEvent(
                    "click", true, false, view, 0, 0, 0, 0, 0
                    , false, false, false, false, 0, null
                );
                node.dispatchEvent(event);
            }
            , webkit_req_fs = view.webkitRequestFileSystem
            , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
            , throw_outside = function (ex) {
                (view.setImmediate || view.setTimeout)(function () {
                    throw ex;
                }, 0);
            }
            , force_saveable_type = "application/octet-stream"
            , fs_min_size = 0
            , deletion_queue = []
            , process_deletion_queue = function () {
                var i = deletion_queue.length;
                while (i--) {
                    var file = deletion_queue[i];
                    if (typeof file === "string") { // file is an object URL
                        get_URL().revokeObjectURL(file);
                    } else { // file is a File
                        file.remove();
                    }
                }
                deletion_queue.length = 0; // clear queue
            }
            , 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);
                        }
                    }
                }
            }
            , FileSaver = function (blob, name) {
                // First try a.download, then web filesystem, then object URLs
                var
                      filesaver = this
                    , type = blob.type
                    , blob_changed = false
                    , object_url
                    , target_view
                    , get_object_url = function () {
                        var object_url = get_URL().createObjectURL(blob);
                        deletion_queue.push(object_url);
                        return 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 () {
                        // don't create more object URLs than needed
                        if (blob_changed || !object_url) {
                            object_url = get_object_url(blob);
                        }
                        if (target_view) {
                            target_view.location.href = object_url;
                        } else {
                            window.open(object_url, "_blank");
                        }
                        filesaver.readyState = filesaver.DONE;
                        dispatch_all();
                    }
                    , abortable = function (func) {
                        return function () {
                            if (filesaver.readyState !== filesaver.DONE) {
                                return func.apply(this, arguments);
                            }
                        };
                    }
                    , create_if_not_found = { create: true, exclusive: false }
                    , slice
                ;
                filesaver.readyState = filesaver.INIT;
                if (!name) {
                    name = "download";
                }
                if (can_use_save_link) {
                    object_url = get_object_url(blob);
                    save_link.href = object_url;
                    save_link.download = name;
                    click(save_link);
                    filesaver.readyState = filesaver.DONE;
                    dispatch_all();
                    return;
                }
                // Object and web filesystem URLs have a problem saving in Google Chrome when
                // viewed in a tab, so I force save with application/octet-stream
                // http://code.google.com/p/chromium/issues/detail?id=91158
                if (view.chrome && type && type !== force_saveable_type) {
                    slice = blob.slice || blob.webkitSlice;
                    blob = slice.call(blob, 0, blob.size, force_saveable_type);
                    blob_changed = true;
                }
                // Since I can't be sure that the guessed media type will trigger a download
                // in WebKit, I append .download to the filename.
                // https://bugs.webkit.org/show_bug.cgi?id=65440
                if (webkit_req_fs && name !== "download") {
                    name += ".download";
                }
                if (type === force_saveable_type || webkit_req_fs) {
                    target_view = view;
                }
                if (!req_fs) {
                    fs_error();
                    return;
                }
                fs_min_size += blob.size;
                req_fs(view.TEMPORARY, fs_min_size, abortable(function (fs) {
                    fs.root.getDirectory("saved", create_if_not_found, abortable(function (dir) {
                        var save = function () {
                            dir.getFile(name, create_if_not_found, abortable(function (file) {
                                file.createWriter(abortable(function (writer) {
                                    writer.onwriteend = function (event) {
                                        target_view.location.href = file.toURL();
                                        deletion_queue.push(file);
                                        filesaver.readyState = filesaver.DONE;
                                        dispatch(filesaver, "writeend", event);
                                    };
                                    writer.onerror = function () {
                                        var error = writer.error;
                                        if (error.code !== error.ABORT_ERR) {
                                            fs_error();
                                        }
                                    };
                                    "writestart progress write abort".split(" ").forEach(function (event) {
                                        writer["on" + event] = filesaver["on" + event];
                                    });
                                    writer.write(blob);
                                    filesaver.abort = function () {
                                        writer.abort();
                                        filesaver.readyState = filesaver.DONE;
                                    };
                                    filesaver.readyState = filesaver.WRITING;
                                }), fs_error);
                            }), fs_error);
                        };
                        dir.getFile(name, { create: false }, abortable(function (file) {
                            // delete file if it already exists
                            file.remove();
                            save();
                        }), abortable(function (ex) {
                            if (ex.code === ex.NOT_FOUND_ERR) {
                                save();
                            } else {
                                fs_error();
                            }
                        }));
                    }), fs_error);
                }), fs_error);
            }
            , FS_proto = FileSaver.prototype
            , saveAs = function (blob, name) {
                return new FileSaver(blob, name);
            }
        ;
        FS_proto.abort = function () {
            var filesaver = this;
            filesaver.readyState = filesaver.DONE;
            dispatch(filesaver, "abort");
        };
        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;
  
        view.addEventListener("unload", process_deletion_queue, false);
        saveAs.unload = function () {
            process_deletion_queue();
            view.removeEventListener("unload", process_deletion_queue, false);
        };
        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 !== null) {
      module.exports = saveAs;
  } else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
      define([], function () {
          return saveAs;
      });
  }
  
  String.prototype.endsWithAny = function () {
      var strArray = Array.prototype.slice.call(arguments),
          $this = this.toLowerCase().toString();
      for (var i = 0; i < strArray.length; i++) {
          if ($this.indexOf(strArray[i], $this.length - strArray[i].length) !== -1) return true;
      }
      return false;
  };
  
  var saveTextAs = saveTextAs
  || (function (textContent, fileName, charset) {
      fileName = fileName || 'download.txt';
      charset = charset || 'utf-8';
      textContent = (textContent || '').replace(/\r?\n/g, "\r\n");
      if (saveAs && Blob) {
          var blob = new Blob([textContent], { type: "text/plain;charset=" + charset });
          saveAs(blob, fileName);
          return true;
      } else {//IE9-
          var saveTxtWindow = window.frames.saveTxtWindow;
          if (!saveTxtWindow) {
              saveTxtWindow = document.createElement('iframe');
              saveTxtWindow.id = 'saveTxtWindow';
              saveTxtWindow.style.display = 'none';
              document.body.insertBefore(saveTxtWindow, null);
              saveTxtWindow = window.frames.saveTxtWindow;
              if (!saveTxtWindow) {
                  saveTxtWindow = window.open('', '_temp', 'width=100,height=100');
                  if (!saveTxtWindow) {
                      window.alert('Sorry, download file could not be created.');
                      return false;
                  }
              }
          }
  
          var doc = saveTxtWindow.document;
          doc.open('text/html', 'replace');
          doc.charset = charset;
          if (fileName.endsWithAny('.htm', '.html')) {
              doc.close();
              doc.body.innerHTML = '\r\n' + textContent + '\r\n';
          } else {
              if (!fileName.endsWithAny('.txt')) fileName += '.txt';
              doc.write(textContent);
              doc.close();
          }
  
          var retValue = doc.execCommand('SaveAs', null, fileName);
          saveTxtWindow.close();
          return retValue;
      }
  })
  