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/wp-includes/js/swfupload/ -> swfupload.js (source)

   1  /**
   2   * SWFUpload: http://www.swfupload.org, http://swfupload.googlecode.com
   3   *
   4   * mmSWFUpload 1.0: Flash upload dialog - http://profandesign.se/swfupload/,  http://www.vinterwebb.se/
   5   *
   6   * SWFUpload is (c) 2006-2007 Lars Huring, Olov Nilzén and Mammon Media and is released under the MIT License:
   7   * http://www.opensource.org/licenses/mit-license.php
   8   *
   9   * SWFUpload 2 is (c) 2007-2008 Jake Roberts and is released under the MIT License:
  10   * http://www.opensource.org/licenses/mit-license.php
  11   *
  12   */
  13  
  14  
  15  /* ******************* */
  16  /* Constructor & Init  */
  17  /* ******************* */
  18  var SWFUpload;
  19  
  20  if (SWFUpload == undefined) {
  21      SWFUpload = function (settings) {
  22          this.initSWFUpload(settings);
  23      };
  24  }
  25  
  26  SWFUpload.prototype.initSWFUpload = function (settings) {
  27      try {
  28          this.customSettings = {};    // A container where developers can place their own settings associated with this instance.
  29          this.settings = settings;
  30          this.eventQueue = [];
  31          this.movieName = "SWFUpload_" + SWFUpload.movieCount++;
  32          this.movieElement = null;
  33  
  34  
  35          // Setup global control tracking
  36          SWFUpload.instances[this.movieName] = this;
  37  
  38          // Load the settings.  Load the Flash movie.
  39          this.initSettings();
  40          this.loadFlash();
  41          this.displayDebugInfo();
  42      } catch (ex) {
  43          delete SWFUpload.instances[this.movieName];
  44          throw ex;
  45      }
  46  };
  47  
  48  /* *************** */
  49  /* Static Members  */
  50  /* *************** */
  51  SWFUpload.instances = {};
  52  SWFUpload.movieCount = 0;
  53  SWFUpload.version = "2.2.0 2009-03-25";
  54  SWFUpload.QUEUE_ERROR = {
  55      QUEUE_LIMIT_EXCEEDED              : -100,
  56      FILE_EXCEEDS_SIZE_LIMIT          : -110,
  57      ZERO_BYTE_FILE                      : -120,
  58      INVALID_FILETYPE                  : -130
  59  };
  60  SWFUpload.UPLOAD_ERROR = {
  61      HTTP_ERROR                          : -200,
  62      MISSING_UPLOAD_URL                  : -210,
  63      IO_ERROR                          : -220,
  64      SECURITY_ERROR                      : -230,
  65      UPLOAD_LIMIT_EXCEEDED              : -240,
  66      UPLOAD_FAILED                      : -250,
  67      SPECIFIED_FILE_ID_NOT_FOUND        : -260,
  68      FILE_VALIDATION_FAILED              : -270,
  69      FILE_CANCELLED                      : -280,
  70      UPLOAD_STOPPED                    : -290
  71  };
  72  SWFUpload.FILE_STATUS = {
  73      QUEUED         : -1,
  74      IN_PROGRESS     : -2,
  75      ERROR         : -3,
  76      COMPLETE     : -4,
  77      CANCELLED     : -5
  78  };
  79  SWFUpload.BUTTON_ACTION = {
  80      SELECT_FILE  : -100,
  81      SELECT_FILES : -110,
  82      START_UPLOAD : -120
  83  };
  84  SWFUpload.CURSOR = {
  85      ARROW : -1,
  86      HAND : -2
  87  };
  88  SWFUpload.WINDOW_MODE = {
  89      WINDOW : "window",
  90      TRANSPARENT : "transparent",
  91      OPAQUE : "opaque"
  92  };
  93  
  94  // Private: takes a URL, determines if it is relative and converts to an absolute URL
  95  // using the current site. Only processes the URL if it can, otherwise returns the URL untouched
  96  SWFUpload.completeURL = function(url) {
  97      if (typeof(url) !== "string" || url.match(/^https?:\/\//i) || url.match(/^\//)) {
  98          return url;
  99      }
 100      
 101      var currentURL = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ":" + window.location.port : "");
 102      
 103      var indexSlash = window.location.pathname.lastIndexOf("/");
 104      if (indexSlash <= 0) {
 105          path = "/";
 106      } else {
 107          path = window.location.pathname.substr(0, indexSlash) + "/";
 108      }
 109      
 110      return /*currentURL +*/ path + url;
 111      
 112  };
 113  
 114  
 115  /* ******************** */
 116  /* Instance Members  */
 117  /* ******************** */
 118  
 119  // Private: initSettings ensures that all the
 120  // settings are set, getting a default value if one was not assigned.
 121  SWFUpload.prototype.initSettings = function () {
 122      this.ensureDefault = function (settingName, defaultValue) {
 123          this.settings[settingName] = (this.settings[settingName] == undefined) ? defaultValue : this.settings[settingName];
 124      };
 125      
 126      // Upload backend settings
 127      this.ensureDefault("upload_url", "");
 128      this.ensureDefault("preserve_relative_urls", false);
 129      this.ensureDefault("file_post_name", "Filedata");
 130      this.ensureDefault("post_params", {});
 131      this.ensureDefault("use_query_string", false);
 132      this.ensureDefault("requeue_on_error", false);
 133      this.ensureDefault("http_success", []);
 134      this.ensureDefault("assume_success_timeout", 0);
 135      
 136      // File Settings
 137      this.ensureDefault("file_types", "*.*");
 138      this.ensureDefault("file_types_description", "All Files");
 139      this.ensureDefault("file_size_limit", 0);    // Default zero means "unlimited"
 140      this.ensureDefault("file_upload_limit", 0);
 141      this.ensureDefault("file_queue_limit", 0);
 142  
 143      // Flash Settings
 144      this.ensureDefault("flash_url", "swfupload.swf");
 145      this.ensureDefault("prevent_swf_caching", true);
 146      
 147      // Button Settings
 148      this.ensureDefault("button_image_url", "");
 149      this.ensureDefault("button_width", 1);
 150      this.ensureDefault("button_height", 1);
 151      this.ensureDefault("button_text", "");
 152      this.ensureDefault("button_text_style", "color: #000000; font-size: 16pt;");
 153      this.ensureDefault("button_text_top_padding", 0);
 154      this.ensureDefault("button_text_left_padding", 0);
 155      this.ensureDefault("button_action", SWFUpload.BUTTON_ACTION.SELECT_FILES);
 156      this.ensureDefault("button_disabled", false);
 157      this.ensureDefault("button_placeholder_id", "");
 158      this.ensureDefault("button_placeholder", null);
 159      this.ensureDefault("button_cursor", SWFUpload.CURSOR.ARROW);
 160      this.ensureDefault("button_window_mode", SWFUpload.WINDOW_MODE.WINDOW);
 161      
 162      // Debug Settings
 163      this.ensureDefault("debug", false);
 164      this.settings.debug_enabled = this.settings.debug;    // Here to maintain v2 API
 165      
 166      // Event Handlers
 167      this.settings.return_upload_start_handler = this.returnUploadStart;
 168      this.ensureDefault("swfupload_loaded_handler", null);
 169      this.ensureDefault("file_dialog_start_handler", null);
 170      this.ensureDefault("file_queued_handler", null);
 171      this.ensureDefault("file_queue_error_handler", null);
 172      this.ensureDefault("file_dialog_complete_handler", null);
 173      
 174      this.ensureDefault("upload_start_handler", null);
 175      this.ensureDefault("upload_progress_handler", null);
 176      this.ensureDefault("upload_error_handler", null);
 177      this.ensureDefault("upload_success_handler", null);
 178      this.ensureDefault("upload_complete_handler", null);
 179      
 180      this.ensureDefault("debug_handler", this.debugMessage);
 181  
 182      this.ensureDefault("custom_settings", {});
 183  
 184      // Other settings
 185      this.customSettings = this.settings.custom_settings;
 186      
 187      // Update the flash url if needed
 188      if (!!this.settings.prevent_swf_caching) {
 189          this.settings.flash_url = this.settings.flash_url + (this.settings.flash_url.indexOf("?") < 0 ? "?" : "&") + "preventswfcaching=" + new Date().getTime();
 190      }
 191      
 192      if (!this.settings.preserve_relative_urls) {
 193          //this.settings.flash_url = SWFUpload.completeURL(this.settings.flash_url);    // Don't need to do this one since flash doesn't look at it
 194          this.settings.upload_url = SWFUpload.completeURL(this.settings.upload_url);
 195          this.settings.button_image_url = SWFUpload.completeURL(this.settings.button_image_url);
 196      }
 197      
 198      delete this.ensureDefault;
 199  };
 200  
 201  // Private: loadFlash replaces the button_placeholder element with the flash movie.
 202  SWFUpload.prototype.loadFlash = function () {
 203      var targetElement, tempParent;
 204  
 205      // Make sure an element with the ID we are going to use doesn't already exist
 206      if (document.getElementById(this.movieName) !== null) {
 207          throw "ID " + this.movieName + " is already in use. The Flash Object could not be added";
 208      }
 209  
 210      // Get the element where we will be placing the flash movie
 211      targetElement = document.getElementById(this.settings.button_placeholder_id) || this.settings.button_placeholder;
 212  
 213      if (targetElement == undefined) {
 214          throw "Could not find the placeholder element: " + this.settings.button_placeholder_id;
 215      }
 216  
 217      // Append the container and load the flash
 218      tempParent = document.createElement("div");
 219      tempParent.innerHTML = this.getFlashHTML();    // Using innerHTML is non-standard but the only sensible way to dynamically add Flash in IE (and maybe other browsers)
 220      targetElement.parentNode.replaceChild(tempParent.firstChild, targetElement);
 221  
 222      // Fix IE Flash/Form bug
 223      if (window[this.movieName] == undefined) {
 224          window[this.movieName] = this.getMovieElement();
 225      }
 226      
 227  };
 228  
 229  // Private: getFlashHTML generates the object tag needed to embed the flash in to the document
 230  SWFUpload.prototype.getFlashHTML = function () {
 231      // Flash Satay object syntax: http://www.alistapart.com/articles/flashsatay
 232      return ['<object id="', this.movieName, '" type="application/x-shockwave-flash" data="', this.settings.flash_url, '" width="', this.settings.button_width, '" height="', this.settings.button_height, '" class="swfupload">',
 233                  '<param name="wmode" value="', this.settings.button_window_mode, '" />',
 234                  '<param name="movie" value="', this.settings.flash_url, '" />',
 235                  '<param name="quality" value="high" />',
 236                  '<param name="menu" value="false" />',
 237                  '<param name="allowScriptAccess" value="always" />',
 238                  '<param name="flashvars" value="' + this.getFlashVars() + '" />',
 239                  '</object>'].join("");
 240  };
 241  
 242  // Private: getFlashVars builds the parameter string that will be passed
 243  // to flash in the flashvars param.
 244  SWFUpload.prototype.getFlashVars = function () {
 245      // Build a string from the post param object
 246      var paramString = this.buildParamString();
 247      var httpSuccessString = this.settings.http_success.join(",");
 248      
 249      // Build the parameter string
 250      return ["movieName=", encodeURIComponent(this.movieName),
 251              "&amp;uploadURL=", encodeURIComponent(this.settings.upload_url),
 252              "&amp;useQueryString=", encodeURIComponent(this.settings.use_query_string),
 253              "&amp;requeueOnError=", encodeURIComponent(this.settings.requeue_on_error),
 254              "&amp;httpSuccess=", encodeURIComponent(httpSuccessString),
 255              "&amp;assumeSuccessTimeout=", encodeURIComponent(this.settings.assume_success_timeout),
 256              "&amp;params=", encodeURIComponent(paramString),
 257              "&amp;filePostName=", encodeURIComponent(this.settings.file_post_name),
 258              "&amp;fileTypes=", encodeURIComponent(this.settings.file_types),
 259              "&amp;fileTypesDescription=", encodeURIComponent(this.settings.file_types_description),
 260              "&amp;fileSizeLimit=", encodeURIComponent(this.settings.file_size_limit),
 261              "&amp;fileUploadLimit=", encodeURIComponent(this.settings.file_upload_limit),
 262              "&amp;fileQueueLimit=", encodeURIComponent(this.settings.file_queue_limit),
 263              "&amp;debugEnabled=", encodeURIComponent(this.settings.debug_enabled),
 264              "&amp;buttonImageURL=", encodeURIComponent(this.settings.button_image_url),
 265              "&amp;buttonWidth=", encodeURIComponent(this.settings.button_width),
 266              "&amp;buttonHeight=", encodeURIComponent(this.settings.button_height),
 267              "&amp;buttonText=", encodeURIComponent(this.settings.button_text),
 268              "&amp;buttonTextTopPadding=", encodeURIComponent(this.settings.button_text_top_padding),
 269              "&amp;buttonTextLeftPadding=", encodeURIComponent(this.settings.button_text_left_padding),
 270              "&amp;buttonTextStyle=", encodeURIComponent(this.settings.button_text_style),
 271              "&amp;buttonAction=", encodeURIComponent(this.settings.button_action),
 272              "&amp;buttonDisabled=", encodeURIComponent(this.settings.button_disabled),
 273              "&amp;buttonCursor=", encodeURIComponent(this.settings.button_cursor)
 274          ].join("");
 275  };
 276  
 277  // Public: getMovieElement retrieves the DOM reference to the Flash element added by SWFUpload
 278  // The element is cached after the first lookup
 279  SWFUpload.prototype.getMovieElement = function () {
 280      if (this.movieElement == undefined) {
 281          this.movieElement = document.getElementById(this.movieName);
 282      }
 283  
 284      if (this.movieElement === null) {
 285          throw "Could not find Flash element";
 286      }
 287      
 288      return this.movieElement;
 289  };
 290  
 291  // Private: buildParamString takes the name/value pairs in the post_params setting object
 292  // and joins them up in to a string formatted "name=value&amp;name=value"
 293  SWFUpload.prototype.buildParamString = function () {
 294      var postParams = this.settings.post_params; 
 295      var paramStringPairs = [];
 296  
 297      if (typeof(postParams) === "object") {
 298          for (var name in postParams) {
 299              if (postParams.hasOwnProperty(name)) {
 300                  paramStringPairs.push(encodeURIComponent(name.toString()) + "=" + encodeURIComponent(postParams[name].toString()));
 301              }
 302          }
 303      }
 304  
 305      return paramStringPairs.join("&amp;");
 306  };
 307  
 308  // Public: Used to remove a SWFUpload instance from the page. This method strives to remove
 309  // all references to the SWF, and other objects so memory is properly freed.
 310  // Returns true if everything was destroyed. Returns a false if a failure occurs leaving SWFUpload in an inconsistant state.
 311  // Credits: Major improvements provided by steffen
 312  SWFUpload.prototype.destroy = function () {
 313      try {
 314          // Make sure Flash is done before we try to remove it
 315          this.cancelUpload(null, false);
 316          
 317  
 318          // Remove the SWFUpload DOM nodes
 319          var movieElement = null;
 320          movieElement = this.getMovieElement();
 321          
 322          if (movieElement && typeof(movieElement.CallFunction) === "unknown") { // We only want to do this in IE
 323              // Loop through all the movie's properties and remove all function references (DOM/JS IE 6/7 memory leak workaround)
 324              for (var i in movieElement) {
 325                  try {
 326                      if (typeof(movieElement[i]) === "function") {
 327                          movieElement[i] = null;
 328                      }
 329                  } catch (ex1) {}
 330              }
 331  
 332              // Remove the Movie Element from the page
 333              try {
 334                  movieElement.parentNode.removeChild(movieElement);
 335              } catch (ex) {}
 336          }
 337          
 338          // Remove IE form fix reference
 339          window[this.movieName] = null;
 340  
 341          // Destroy other references
 342          SWFUpload.instances[this.movieName] = null;
 343          delete SWFUpload.instances[this.movieName];
 344  
 345          this.movieElement = null;
 346          this.settings = null;
 347          this.customSettings = null;
 348          this.eventQueue = null;
 349          this.movieName = null;
 350          
 351          
 352          return true;
 353      } catch (ex2) {
 354          return false;
 355      }
 356  };
 357  
 358  
 359  // Public: displayDebugInfo prints out settings and configuration
 360  // information about this SWFUpload instance.
 361  // This function (and any references to it) can be deleted when placing
 362  // SWFUpload in production.
 363  SWFUpload.prototype.displayDebugInfo = function () {
 364      this.debug(
 365          [
 366              "---SWFUpload Instance Info---\n",
 367              "Version: ", SWFUpload.version, "\n",
 368              "Movie Name: ", this.movieName, "\n",
 369              "Settings:\n",
 370              "\t", "upload_url:               ", this.settings.upload_url, "\n",
 371              "\t", "flash_url:                ", this.settings.flash_url, "\n",
 372              "\t", "use_query_string:         ", this.settings.use_query_string.toString(), "\n",
 373              "\t", "requeue_on_error:         ", this.settings.requeue_on_error.toString(), "\n",
 374              "\t", "http_success:             ", this.settings.http_success.join(", "), "\n",
 375              "\t", "assume_success_timeout:   ", this.settings.assume_success_timeout, "\n",
 376              "\t", "file_post_name:           ", this.settings.file_post_name, "\n",
 377              "\t", "post_params:              ", this.settings.post_params.toString(), "\n",
 378              "\t", "file_types:               ", this.settings.file_types, "\n",
 379              "\t", "file_types_description:   ", this.settings.file_types_description, "\n",
 380              "\t", "file_size_limit:          ", this.settings.file_size_limit, "\n",
 381              "\t", "file_upload_limit:        ", this.settings.file_upload_limit, "\n",
 382              "\t", "file_queue_limit:         ", this.settings.file_queue_limit, "\n",
 383              "\t", "debug:                    ", this.settings.debug.toString(), "\n",
 384  
 385              "\t", "prevent_swf_caching:      ", this.settings.prevent_swf_caching.toString(), "\n",
 386  
 387              "\t", "button_placeholder_id:    ", this.settings.button_placeholder_id.toString(), "\n",
 388              "\t", "button_placeholder:       ", (this.settings.button_placeholder ? "Set" : "Not Set"), "\n",
 389              "\t", "button_image_url:         ", this.settings.button_image_url.toString(), "\n",
 390              "\t", "button_width:             ", this.settings.button_width.toString(), "\n",
 391              "\t", "button_height:            ", this.settings.button_height.toString(), "\n",
 392              "\t", "button_text:              ", this.settings.button_text.toString(), "\n",
 393              "\t", "button_text_style:        ", this.settings.button_text_style.toString(), "\n",
 394              "\t", "button_text_top_padding:  ", this.settings.button_text_top_padding.toString(), "\n",
 395              "\t", "button_text_left_padding: ", this.settings.button_text_left_padding.toString(), "\n",
 396              "\t", "button_action:            ", this.settings.button_action.toString(), "\n",
 397              "\t", "button_disabled:          ", this.settings.button_disabled.toString(), "\n",
 398  
 399              "\t", "custom_settings:          ", this.settings.custom_settings.toString(), "\n",
 400              "Event Handlers:\n",
 401              "\t", "swfupload_loaded_handler assigned:  ", (typeof this.settings.swfupload_loaded_handler === "function").toString(), "\n",
 402              "\t", "file_dialog_start_handler assigned: ", (typeof this.settings.file_dialog_start_handler === "function").toString(), "\n",
 403              "\t", "file_queued_handler assigned:       ", (typeof this.settings.file_queued_handler === "function").toString(), "\n",
 404              "\t", "file_queue_error_handler assigned:  ", (typeof this.settings.file_queue_error_handler === "function").toString(), "\n",
 405              "\t", "upload_start_handler assigned:      ", (typeof this.settings.upload_start_handler === "function").toString(), "\n",
 406              "\t", "upload_progress_handler assigned:   ", (typeof this.settings.upload_progress_handler === "function").toString(), "\n",
 407              "\t", "upload_error_handler assigned:      ", (typeof this.settings.upload_error_handler === "function").toString(), "\n",
 408              "\t", "upload_success_handler assigned:    ", (typeof this.settings.upload_success_handler === "function").toString(), "\n",
 409              "\t", "upload_complete_handler assigned:   ", (typeof this.settings.upload_complete_handler === "function").toString(), "\n",
 410              "\t", "debug_handler assigned:             ", (typeof this.settings.debug_handler === "function").toString(), "\n"
 411          ].join("")
 412      );
 413  };
 414  
 415  /* Note: addSetting and getSetting are no longer used by SWFUpload but are included
 416      the maintain v2 API compatibility
 417  */
 418  // Public: (Deprecated) addSetting adds a setting value. If the value given is undefined or null then the default_value is used.
 419  SWFUpload.prototype.addSetting = function (name, value, default_value) {
 420      if (value == undefined) {
 421          return (this.settings[name] = default_value);
 422      } else {
 423          return (this.settings[name] = value);
 424      }
 425  };
 426  
 427  // Public: (Deprecated) getSetting gets a setting. Returns an empty string if the setting was not found.
 428  SWFUpload.prototype.getSetting = function (name) {
 429      if (this.settings[name] != undefined) {
 430          return this.settings[name];
 431      }
 432  
 433      return "";
 434  };
 435  
 436  
 437  
 438  // Private: callFlash handles function calls made to the Flash element.
 439  // Calls are made with a setTimeout for some functions to work around
 440  // bugs in the ExternalInterface library.
 441  SWFUpload.prototype.callFlash = function (functionName, argumentArray) {
 442      argumentArray = argumentArray || [];
 443      
 444      var movieElement = this.getMovieElement();
 445      var returnValue, returnString;
 446  
 447      // Flash's method if calling ExternalInterface methods (code adapted from MooTools).
 448      try {
 449          returnString = movieElement.CallFunction('<invoke name="' + functionName + '" returntype="javascript">' + __flash__argumentsToXML(argumentArray, 0) + '</invoke>');
 450          returnValue = eval(returnString);
 451      } catch (ex) {
 452          throw "Call to " + functionName + " failed";
 453      }
 454      
 455      // Unescape file post param values
 456      if (returnValue != undefined && typeof returnValue.post === "object") {
 457          returnValue = this.unescapeFilePostParams(returnValue);
 458      }
 459  
 460      return returnValue;
 461  };
 462  
 463  /* *****************************
 464      -- Flash control methods --
 465      Your UI should use these
 466      to operate SWFUpload
 467     ***************************** */
 468  
 469  // WARNING: this function does not work in Flash Player 10
 470  // Public: selectFile causes a File Selection Dialog window to appear.  This
 471  // dialog only allows 1 file to be selected.
 472  SWFUpload.prototype.selectFile = function () {
 473      this.callFlash("SelectFile");
 474  };
 475  
 476  // WARNING: this function does not work in Flash Player 10
 477  // Public: selectFiles causes a File Selection Dialog window to appear/ This
 478  // dialog allows the user to select any number of files
 479  // Flash Bug Warning: Flash limits the number of selectable files based on the combined length of the file names.
 480  // If the selection name length is too long the dialog will fail in an unpredictable manner.  There is no work-around
 481  // for this bug.
 482  SWFUpload.prototype.selectFiles = function () {
 483      this.callFlash("SelectFiles");
 484  };
 485  
 486  
 487  // Public: startUpload starts uploading the first file in the queue unless
 488  // the optional parameter 'fileID' specifies the ID 
 489  SWFUpload.prototype.startUpload = function (fileID) {
 490      this.callFlash("StartUpload", [fileID]);
 491  };
 492  
 493  // Public: cancelUpload cancels any queued file.  The fileID parameter may be the file ID or index.
 494  // If you do not specify a fileID the current uploading file or first file in the queue is cancelled.
 495  // If you do not want the uploadError event to trigger you can specify false for the triggerErrorEvent parameter.
 496  SWFUpload.prototype.cancelUpload = function (fileID, triggerErrorEvent) {
 497      if (triggerErrorEvent !== false) {
 498          triggerErrorEvent = true;
 499      }
 500      this.callFlash("CancelUpload", [fileID, triggerErrorEvent]);
 501  };
 502  
 503  // Public: stopUpload stops the current upload and requeues the file at the beginning of the queue.
 504  // If nothing is currently uploading then nothing happens.
 505  SWFUpload.prototype.stopUpload = function () {
 506      this.callFlash("StopUpload");
 507  };
 508  
 509  /* ************************
 510   * Settings methods
 511   *   These methods change the SWFUpload settings.
 512   *   SWFUpload settings should not be changed directly on the settings object
 513   *   since many of the settings need to be passed to Flash in order to take
 514   *   effect.
 515   * *********************** */
 516  
 517  // Public: getStats gets the file statistics object.
 518  SWFUpload.prototype.getStats = function () {
 519      return this.callFlash("GetStats");
 520  };
 521  
 522  // Public: setStats changes the SWFUpload statistics.  You shouldn't need to 
 523  // change the statistics but you can.  Changing the statistics does not
 524  // affect SWFUpload accept for the successful_uploads count which is used
 525  // by the upload_limit setting to determine how many files the user may upload.
 526  SWFUpload.prototype.setStats = function (statsObject) {
 527      this.callFlash("SetStats", [statsObject]);
 528  };
 529  
 530  // Public: getFile retrieves a File object by ID or Index.  If the file is
 531  // not found then 'null' is returned.
 532  SWFUpload.prototype.getFile = function (fileID) {
 533      if (typeof(fileID) === "number") {
 534          return this.callFlash("GetFileByIndex", [fileID]);
 535      } else {
 536          return this.callFlash("GetFile", [fileID]);
 537      }
 538  };
 539  
 540  // Public: addFileParam sets a name/value pair that will be posted with the
 541  // file specified by the Files ID.  If the name already exists then the
 542  // exiting value will be overwritten.
 543  SWFUpload.prototype.addFileParam = function (fileID, name, value) {
 544      return this.callFlash("AddFileParam", [fileID, name, value]);
 545  };
 546  
 547  // Public: removeFileParam removes a previously set (by addFileParam) name/value
 548  // pair from the specified file.
 549  SWFUpload.prototype.removeFileParam = function (fileID, name) {
 550      this.callFlash("RemoveFileParam", [fileID, name]);
 551  };
 552  
 553  // Public: setUploadUrl changes the upload_url setting.
 554  SWFUpload.prototype.setUploadURL = function (url) {
 555      this.settings.upload_url = url.toString();
 556      this.callFlash("SetUploadURL", [url]);
 557  };
 558  
 559  // Public: setPostParams changes the post_params setting
 560  SWFUpload.prototype.setPostParams = function (paramsObject) {
 561      this.settings.post_params = paramsObject;
 562      this.callFlash("SetPostParams", [paramsObject]);
 563  };
 564  
 565  // Public: addPostParam adds post name/value pair.  Each name can have only one value.
 566  SWFUpload.prototype.addPostParam = function (name, value) {
 567      this.settings.post_params[name] = value;
 568      this.callFlash("SetPostParams", [this.settings.post_params]);
 569  };
 570  
 571  // Public: removePostParam deletes post name/value pair.
 572  SWFUpload.prototype.removePostParam = function (name) {
 573      delete this.settings.post_params[name];
 574      this.callFlash("SetPostParams", [this.settings.post_params]);
 575  };
 576  
 577  // Public: setFileTypes changes the file_types setting and the file_types_description setting
 578  SWFUpload.prototype.setFileTypes = function (types, description) {
 579      this.settings.file_types = types;
 580      this.settings.file_types_description = description;
 581      this.callFlash("SetFileTypes", [types, description]);
 582  };
 583  
 584  // Public: setFileSizeLimit changes the file_size_limit setting
 585  SWFUpload.prototype.setFileSizeLimit = function (fileSizeLimit) {
 586      this.settings.file_size_limit = fileSizeLimit;
 587      this.callFlash("SetFileSizeLimit", [fileSizeLimit]);
 588  };
 589  
 590  // Public: setFileUploadLimit changes the file_upload_limit setting
 591  SWFUpload.prototype.setFileUploadLimit = function (fileUploadLimit) {
 592      this.settings.file_upload_limit = fileUploadLimit;
 593      this.callFlash("SetFileUploadLimit", [fileUploadLimit]);
 594  };
 595  
 596  // Public: setFileQueueLimit changes the file_queue_limit setting
 597  SWFUpload.prototype.setFileQueueLimit = function (fileQueueLimit) {
 598      this.settings.file_queue_limit = fileQueueLimit;
 599      this.callFlash("SetFileQueueLimit", [fileQueueLimit]);
 600  };
 601  
 602  // Public: setFilePostName changes the file_post_name setting
 603  SWFUpload.prototype.setFilePostName = function (filePostName) {
 604      this.settings.file_post_name = filePostName;
 605      this.callFlash("SetFilePostName", [filePostName]);
 606  };
 607  
 608  // Public: setUseQueryString changes the use_query_string setting
 609  SWFUpload.prototype.setUseQueryString = function (useQueryString) {
 610      this.settings.use_query_string = useQueryString;
 611      this.callFlash("SetUseQueryString", [useQueryString]);
 612  };
 613  
 614  // Public: setRequeueOnError changes the requeue_on_error setting
 615  SWFUpload.prototype.setRequeueOnError = function (requeueOnError) {
 616      this.settings.requeue_on_error = requeueOnError;
 617      this.callFlash("SetRequeueOnError", [requeueOnError]);
 618  };
 619  
 620  // Public: setHTTPSuccess changes the http_success setting
 621  SWFUpload.prototype.setHTTPSuccess = function (http_status_codes) {
 622      if (typeof http_status_codes === "string") {
 623          http_status_codes = http_status_codes.replace(" ", "").split(",");
 624      }
 625      
 626      this.settings.http_success = http_status_codes;
 627      this.callFlash("SetHTTPSuccess", [http_status_codes]);
 628  };
 629  
 630  // Public: setHTTPSuccess changes the http_success setting
 631  SWFUpload.prototype.setAssumeSuccessTimeout = function (timeout_seconds) {
 632      this.settings.assume_success_timeout = timeout_seconds;
 633      this.callFlash("SetAssumeSuccessTimeout", [timeout_seconds]);
 634  };
 635  
 636  // Public: setDebugEnabled changes the debug_enabled setting
 637  SWFUpload.prototype.setDebugEnabled = function (debugEnabled) {
 638      this.settings.debug_enabled = debugEnabled;
 639      this.callFlash("SetDebugEnabled", [debugEnabled]);
 640  };
 641  
 642  // Public: setButtonImageURL loads a button image sprite
 643  SWFUpload.prototype.setButtonImageURL = function (buttonImageURL) {
 644      if (buttonImageURL == undefined) {
 645          buttonImageURL = "";
 646      }
 647      
 648      this.settings.button_image_url = buttonImageURL;
 649      this.callFlash("SetButtonImageURL", [buttonImageURL]);
 650  };
 651  
 652  // Public: setButtonDimensions resizes the Flash Movie and button
 653  SWFUpload.prototype.setButtonDimensions = function (width, height) {
 654      this.settings.button_width = width;
 655      this.settings.button_height = height;
 656      
 657      var movie = this.getMovieElement();
 658      if (movie != undefined) {
 659          movie.style.width = width + "px";
 660          movie.style.height = height + "px";
 661      }
 662      
 663      this.callFlash("SetButtonDimensions", [width, height]);
 664  };
 665  // Public: setButtonText Changes the text overlaid on the button
 666  SWFUpload.prototype.setButtonText = function (html) {
 667      this.settings.button_text = html;
 668      this.callFlash("SetButtonText", [html]);
 669  };
 670  // Public: setButtonTextPadding changes the top and left padding of the text overlay
 671  SWFUpload.prototype.setButtonTextPadding = function (left, top) {
 672      this.settings.button_text_top_padding = top;
 673      this.settings.button_text_left_padding = left;
 674      this.callFlash("SetButtonTextPadding", [left, top]);
 675  };
 676  
 677  // Public: setButtonTextStyle changes the CSS used to style the HTML/Text overlaid on the button
 678  SWFUpload.prototype.setButtonTextStyle = function (css) {
 679      this.settings.button_text_style = css;
 680      this.callFlash("SetButtonTextStyle", [css]);
 681  };
 682  // Public: setButtonDisabled disables/enables the button
 683  SWFUpload.prototype.setButtonDisabled = function (isDisabled) {
 684      this.settings.button_disabled = isDisabled;
 685      this.callFlash("SetButtonDisabled", [isDisabled]);
 686  };
 687  // Public: setButtonAction sets the action that occurs when the button is clicked
 688  SWFUpload.prototype.setButtonAction = function (buttonAction) {
 689      this.settings.button_action = buttonAction;
 690      this.callFlash("SetButtonAction", [buttonAction]);
 691  };
 692  
 693  // Public: setButtonCursor changes the mouse cursor displayed when hovering over the button
 694  SWFUpload.prototype.setButtonCursor = function (cursor) {
 695      this.settings.button_cursor = cursor;
 696      this.callFlash("SetButtonCursor", [cursor]);
 697  };
 698  
 699  /* *******************************
 700      Flash Event Interfaces
 701      These functions are used by Flash to trigger the various
 702      events.
 703      
 704      All these functions a Private.
 705      
 706      Because the ExternalInterface library is buggy the event calls
 707      are added to a queue and the queue then executed by a setTimeout.
 708      This ensures that events are executed in a determinate order and that
 709      the ExternalInterface bugs are avoided.
 710  ******************************* */
 711  
 712  SWFUpload.prototype.queueEvent = function (handlerName, argumentArray) {
 713      // Warning: Don't call this.debug inside here or you'll create an infinite loop
 714      
 715      if (argumentArray == undefined) {
 716          argumentArray = [];
 717      } else if (!(argumentArray instanceof Array)) {
 718          argumentArray = [argumentArray];
 719      }
 720      
 721      var self = this;
 722      if (typeof this.settings[handlerName] === "function") {
 723          // Queue the event
 724          this.eventQueue.push(function () {
 725              this.settings[handlerName].apply(this, argumentArray);
 726          });
 727          
 728          // Execute the next queued event
 729          setTimeout(function () {
 730              self.executeNextEvent();
 731          }, 0);
 732          
 733      } else if (this.settings[handlerName] !== null) {
 734          throw "Event handler " + handlerName + " is unknown or is not a function";
 735      }
 736  };
 737  
 738  // Private: Causes the next event in the queue to be executed.  Since events are queued using a setTimeout
 739  // we must queue them in order to garentee that they are executed in order.
 740  SWFUpload.prototype.executeNextEvent = function () {
 741      // Warning: Don't call this.debug inside here or you'll create an infinite loop
 742  
 743      var  f = this.eventQueue ? this.eventQueue.shift() : null;
 744      if (typeof(f) === "function") {
 745          f.apply(this);
 746      }
 747  };
 748  
 749  // Private: unescapeFileParams is part of a workaround for a flash bug where objects passed through ExternalInterface cannot have
 750  // properties that contain characters that are not valid for JavaScript identifiers. To work around this
 751  // the Flash Component escapes the parameter names and we must unescape again before passing them along.
 752  SWFUpload.prototype.unescapeFilePostParams = function (file) {
 753      var reg = /[$]([0-9a-f]{4})/i;
 754      var unescapedPost = {};
 755      var uk;
 756  
 757      if (file != undefined) {
 758          for (var k in file.post) {
 759              if (file.post.hasOwnProperty(k)) {
 760                  uk = k;
 761                  var match;
 762                  while ((match = reg.exec(uk)) !== null) {
 763                      uk = uk.replace(match[0], String.fromCharCode(parseInt("0x" + match[1], 16)));
 764                  }
 765                  unescapedPost[uk] = file.post[k];
 766              }
 767          }
 768  
 769          file.post = unescapedPost;
 770      }
 771  
 772      return file;
 773  };
 774  
 775  // Private: Called by Flash to see if JS can call in to Flash (test if External Interface is working)
 776  SWFUpload.prototype.testExternalInterface = function () {
 777      try {
 778          return this.callFlash("TestExternalInterface");
 779      } catch (ex) {
 780          return false;
 781      }
 782  };
 783  
 784  // Private: This event is called by Flash when it has finished loading. Don't modify this.
 785  // Use the swfupload_loaded_handler event setting to execute custom code when SWFUpload has loaded.
 786  SWFUpload.prototype.flashReady = function () {
 787      // Check that the movie element is loaded correctly with its ExternalInterface methods defined
 788      var movieElement = this.getMovieElement();
 789  
 790      if (!movieElement) {
 791          this.debug("Flash called back ready but the flash movie can't be found.");
 792          return;
 793      }
 794  
 795      this.cleanUp(movieElement);
 796      
 797      this.queueEvent("swfupload_loaded_handler");
 798  };
 799  
 800  // Private: removes Flash added fuctions to the DOM node to prevent memory leaks in IE.
 801  // This function is called by Flash each time the ExternalInterface functions are created.
 802  SWFUpload.prototype.cleanUp = function (movieElement) {
 803      // Pro-actively unhook all the Flash functions
 804      try {
 805          if (this.movieElement && typeof(movieElement.CallFunction) === "unknown") { // We only want to do this in IE
 806              this.debug("Removing Flash functions hooks (this should only run in IE and should prevent memory leaks)");
 807              for (var key in movieElement) {
 808                  try {
 809                      if (typeof(movieElement[key]) === "function") {
 810                          movieElement[key] = null;
 811                      }
 812                  } catch (ex) {
 813                  }
 814              }
 815          }
 816      } catch (ex1) {
 817      
 818      }
 819  
 820      // Fix Flashes own cleanup code so if the SWFMovie was removed from the page
 821      // it doesn't display errors.
 822      window["__flash__removeCallback"] = function (instance, name) {
 823          try {
 824              if (instance) {
 825                  instance[name] = null;
 826              }
 827          } catch (flashEx) {
 828          
 829          }
 830      };
 831  
 832  };
 833  
 834  
 835  /* This is a chance to do something before the browse window opens */
 836  SWFUpload.prototype.fileDialogStart = function () {
 837      this.queueEvent("file_dialog_start_handler");
 838  };
 839  
 840  
 841  /* Called when a file is successfully added to the queue. */
 842  SWFUpload.prototype.fileQueued = function (file) {
 843      file = this.unescapeFilePostParams(file);
 844      this.queueEvent("file_queued_handler", file);
 845  };
 846  
 847  
 848  /* Handle errors that occur when an attempt to queue a file fails. */
 849  SWFUpload.prototype.fileQueueError = function (file, errorCode, message) {
 850      file = this.unescapeFilePostParams(file);
 851      this.queueEvent("file_queue_error_handler", [file, errorCode, message]);
 852  };
 853  
 854  /* Called after the file dialog has closed and the selected files have been queued.
 855      You could call startUpload here if you want the queued files to begin uploading immediately. */
 856  SWFUpload.prototype.fileDialogComplete = function (numFilesSelected, numFilesQueued, numFilesInQueue) {
 857      this.queueEvent("file_dialog_complete_handler", [numFilesSelected, numFilesQueued, numFilesInQueue]);
 858  };
 859  
 860  SWFUpload.prototype.uploadStart = function (file) {
 861      file = this.unescapeFilePostParams(file);
 862      this.queueEvent("return_upload_start_handler", file);
 863  };
 864  
 865  SWFUpload.prototype.returnUploadStart = function (file) {
 866      var returnValue;
 867      if (typeof this.settings.upload_start_handler === "function") {
 868          file = this.unescapeFilePostParams(file);
 869          returnValue = this.settings.upload_start_handler.call(this, file);
 870      } else if (this.settings.upload_start_handler != undefined) {
 871          throw "upload_start_handler must be a function";
 872      }
 873  
 874      // Convert undefined to true so if nothing is returned from the upload_start_handler it is
 875      // interpretted as 'true'.
 876      if (returnValue === undefined) {
 877          returnValue = true;
 878      }
 879      
 880      returnValue = !!returnValue;
 881      
 882      this.callFlash("ReturnUploadStart", [returnValue]);
 883  };
 884  
 885  
 886  
 887  SWFUpload.prototype.uploadProgress = function (file, bytesComplete, bytesTotal) {
 888      file = this.unescapeFilePostParams(file);
 889      this.queueEvent("upload_progress_handler", [file, bytesComplete, bytesTotal]);
 890  };
 891  
 892  SWFUpload.prototype.uploadError = function (file, errorCode, message) {
 893      file = this.unescapeFilePostParams(file);
 894      this.queueEvent("upload_error_handler", [file, errorCode, message]);
 895  };
 896  
 897  SWFUpload.prototype.uploadSuccess = function (file, serverData, responseReceived) {
 898      file = this.unescapeFilePostParams(file);
 899      this.queueEvent("upload_success_handler", [file, serverData, responseReceived]);
 900  };
 901  
 902  SWFUpload.prototype.uploadComplete = function (file) {
 903      file = this.unescapeFilePostParams(file);
 904      this.queueEvent("upload_complete_handler", file);
 905  };
 906  
 907  /* Called by SWFUpload JavaScript and Flash functions when debug is enabled. By default it writes messages to the
 908     internal debug console.  You can override this event and have messages written where you want. */
 909  SWFUpload.prototype.debug = function (message) {
 910      this.queueEvent("debug_handler", message);
 911  };
 912  
 913  
 914  /* **********************************
 915      Debug Console
 916      The debug console is a self contained, in page location
 917      for debug message to be sent.  The Debug Console adds
 918      itself to the body if necessary.
 919  
 920      The console is automatically scrolled as messages appear.
 921      
 922      If you are using your own debug handler or when you deploy to production and
 923      have debug disabled you can remove these functions to reduce the file size
 924      and complexity.
 925  ********************************** */
 926     
 927  // Private: debugMessage is the default debug_handler.  If you want to print debug messages
 928  // call the debug() function.  When overriding the function your own function should
 929  // check to see if the debug setting is true before outputting debug information.
 930  SWFUpload.prototype.debugMessage = function (message) {
 931      if (this.settings.debug) {
 932          var exceptionMessage, exceptionValues = [];
 933  
 934          // Check for an exception object and print it nicely
 935          if (typeof message === "object" && typeof message.name === "string" && typeof message.message === "string") {
 936              for (var key in message) {
 937                  if (message.hasOwnProperty(key)) {
 938                      exceptionValues.push(key + ": " + message[key]);
 939                  }
 940              }
 941              exceptionMessage = exceptionValues.join("\n") || "";
 942              exceptionValues = exceptionMessage.split("\n");
 943              exceptionMessage = "EXCEPTION: " + exceptionValues.join("\nEXCEPTION: ");
 944              SWFUpload.Console.writeLine(exceptionMessage);
 945          } else {
 946              SWFUpload.Console.writeLine(message);
 947          }
 948      }
 949  };
 950  
 951  SWFUpload.Console = {};
 952  SWFUpload.Console.writeLine = function (message) {
 953      var console, documentForm;
 954  
 955      try {
 956          console = document.getElementById("SWFUpload_Console");
 957  
 958          if (!console) {
 959              documentForm = document.createElement("form");
 960              document.getElementsByTagName("body")[0].appendChild(documentForm);
 961  
 962              console = document.createElement("textarea");
 963              console.id = "SWFUpload_Console";
 964              console.style.fontFamily = "monospace";
 965              console.setAttribute("wrap", "off");
 966              console.wrap = "off";
 967              console.style.overflow = "auto";
 968              console.style.width = "700px";
 969              console.style.height = "350px";
 970              console.style.margin = "5px";
 971              documentForm.appendChild(console);
 972          }
 973  
 974          console.value += message + "\n";
 975  
 976          console.scrollTop = console.scrollHeight - console.clientHeight;
 977      } catch (ex) {
 978          alert("Exception: " + ex.name + " Message: " + ex.message);
 979      }
 980  };


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