modules/download-manager.js

   1 require("special-buffer.js");
   2 var download_manager_service = Cc["@mozilla.org/download-manager;1"].getService(Ci.nsIDownloadManager);
   3 //var download_manager_ui = Cc["@mozilla.org/download-manager-ui;1"].getService(Ci.nsIDownloadManagerUI);
   4 var download_manager_builtin_ui = Components.classesByID["{7dfdf0d1-aff6-4a34-bad1-d0fe74601642}"]
   5     .getService(Ci.nsIDownloadManagerUI);
   6
   7 /* This implements nsIHelperAppLauncherDialog interface. */
   8 function download_helper()
   9 {}
  10 download_helper.prototype = {
  11     QueryInterface: generate_QI(Ci.nsIHelperAppLauncherDialog, Ci.nsIWebProgressListener2),
  12
  13     create_panel : function() {
  14         this.panel = create_info_panel(this.window, "download-panel",
  15                                        [["downloading", "Downloading:", this.launcher.source.spec],
  16                                         ["mime-type", "Mime type:", this.launcher.MIMEInfo.MIMEType]]);
  17     },
  18
  19     handle_show: function () {
  20         var action_chosen = false;
  21         try {
  22             this.create_panel();
  23             var action = yield this.window.minibuffer.read_single_character_option(
  24                 $prompt = "Action to perform: (save or open)",
  25                 $options = ["s", "o"]);
  26
  27
  28             if (action == "s") {
  29                 var suggested_path = suggest_save_path_from_file_name(this.launcher.suggestedFileName, this.buffer);
  30                 var file = yield this.window.minibuffer.read_file_check_overwrite(
  31                     $prompt = "Save to file:",
  32                     $initial_value = suggested_path,
  33                     $select);
  34                 register_download(this.buffer, this.launcher.source);
  35                 this.launcher.saveToDisk(file, false);
  36                 action_chosen = true;
  37
  38             } else {
  39                 var cwd = this.buffer ? this.buffer.cwd : default_directory.path;
  40                 var mime_type = this.launcher.MIMEInfo.MIMEType;
  41                 var suggested_action = get_external_handler_for_mime_type(mime_type);
  42                 var command = yield this.window.minibuffer.read_shell_command(
  43                     $initial_value = suggested_action,
  44                     $cwd = cwd);
  45                 var file = get_temporary_file(this.launcher.suggestedFileName);
  46                 var info = register_download(this.buffer, this.launcher.source);
  47                 info.temporary_status = DOWNLOAD_TEMPORARY_FOR_COMMAND;
  48                 info.set_shell_command(command, cwd);
  49                 this.launcher.saveToDisk(file, false);
  50                 action_chosen = true;
  51             }
  52         } catch (e) {
  53             handle_interactive_error(this.window, e);
  54         } finally {
  55             if (action_chosen)
  56                 this.cleanup();
  57             else
  58                 this.abort();
  59         }
  60     },
  61
  62     show : function (launcher, context, reason) {
  63         this.launcher = launcher;
  64
  65         // Get associated buffer; if that fails (hopefully not), just get any window
  66         var buffer = null;
  67         var window = null;
  68         try {
  69             var frame = context.QueryInterface(Ci.nsIWebProgress).DOMWindow.top;
  70             window = get_window_from_frame(frame);
  71             if (window)
  72                 buffer = get_buffer_from_frame(window, frame);
  73         } catch (e) {
  74             window = get_recent_conkeror_window();
  75
  76             if (window == null) {
  77                 // FIXME: need to handle this case perhaps where no windows exist
  78                 this.abort(); // for now, just cancel the download
  79                 return;
  80             }
  81         }
  82
  83         this.window = window;
  84         this.buffer = buffer;
  85
  86         co_call(this.handle_show());
  87     },
  88
  89     abort : function () {
  90         const NS_BINDING_ABORTED = 0x804b0002;
  91         this.launcher.cancel(NS_BINDING_ABORTED);
  92         this.cleanup();
  93     },
  94
  95     cleanup : function () {
  96         if (this.panel)
  97             this.panel.destroy();
  98         this.panel = null;
  99         this.launcher = null;
 100         this.window = null;
 101         this.buffer = null;
 102     },
 103
 104     promptForSaveToFile : function(launcher, context, default_file, suggested_file_extension) {
 105         return null;
 106     }
 107 };
 108
 109
 110 var unmanaged_download_info_list = [];
 111 var id_to_download_info = {};
 112
 113 // Import these constants for convenience
 114 const DOWNLOAD_NOTSTARTED = Ci.nsIDownloadManager.DOWNLOAD_NOTSTARTED;
 115 const DOWNLOAD_DOWNLOADING = Ci.nsIDownloadManager.DOWNLOAD_DOWNLOADING;
 116 const DOWNLOAD_FINISHED = Ci.nsIDownloadManager.DOWNLOAD_FINISHED;
 117 const DOWNLOAD_FAILED = Ci.nsIDownloadManager.DOWNLOAD_FAILED;
 118 const DOWNLOAD_CANCELED = Ci.nsIDownloadManager.DOWNLOAD_CANCELED;
 119 const DOWNLOAD_PAUSED = Ci.nsIDownloadManager.DOWNLOAD_PAUSED;
 120 const DOWNLOAD_QUEUED = Ci.nsIDownloadManager.DOWNLOAD_QUEUED;
 121 const DOWNLOAD_BLOCKED = Ci.nsIDownloadManager.DOWNLOAD_BLOCKED;
 122 const DOWNLOAD_SCANNING = Ci.nsIDownloadManager.DOWNLOAD_SCANNING;
 123
 124
 125 const DOWNLOAD_NOT_TEMPORARY = 0;
 126 const DOWNLOAD_TEMPORARY_FOR_ACTION = 1;
 127 const DOWNLOAD_TEMPORARY_FOR_COMMAND = 2;
 128
 129 function download_info(source_buffer, mozilla_info) {
 130     this.source_buffer = source_buffer;
 131     if (mozilla_info != null)
 132         this.attach(mozilla_info);
 133 }
 134 download_info.prototype = {
 135     attach : function (mozilla_info) {
 136         this.mozilla_info = mozilla_info;
 137         id_to_download_info[mozilla_info.id] = this;
 138         download_added_hook.run(this);
 139     },
 140
 141     shell_command : null,
 142
 143     shell_command_cwd : null,
 144
 145     temporary_status : DOWNLOAD_NOT_TEMPORARY,
 146
 147     action_description : null,
 148
 149     set_shell_command : function (str, cwd) {
 150         this.shell_command = str;
 151         this.shell_command_cwd = cwd;
 152         if (this.mozilla_info)
 153             download_shell_command_change_hook.run(this);
 154     },
 155
 156     /**
 157      * None of the following members may be used until attach is called
 158      */
 159
 160     // Reflectors to properties of nsIDownload
 161     get state () { return this.mozilla_info.state; },
 162     get target_file () { return this.mozilla_info.targetFile; },
 163     get amount_transferred () { return this.mozilla_info.amountTransferred; },
 164     get percent_complete () { return this.mozilla_info.percentComplete; },
 165     get size () {
 166         var s = this.mozilla_info.size;
 167         /* nsIDownload.size is a PRUint64, and will have value
 168          * LL_MAXUINT (2^64 - 1) to indicate an unknown size.  Because
 169          * JavaScript only has a double numerical type, this value
 170          * cannot be represented exactly, so 2^36 is used instead as the cutoff. */
 171         if (s < 68719476736 /* 2^36 */)
 172             return s;
 173         return -1;
 174     },
 175     get source () { return this.mozilla_info.source; },
 176     get start_time () { return this.mozilla_info.startTime; },
 177     get speed () { return this.mozilla_info.speed; },
 178     get MIME_info () { return this.mozilla_info.MIMEInfo; },
 179     get MIME_type () {
 180         if (this.MIME_info)
 181             return this.MIME_info.MIMEType;
 182         return null;
 183     },
 184     get id () { return this.mozilla_info.id; },
 185     get referrer () { return this.mozilla_info.referrer; },
 186
 187     throw_if_removed : function () {
 188         if (this.removed)
 189             throw interactive_error("Download has already been removed from the download manager.");
 190     },
 191
 192     throw_state_error : function () {
 193         switch (this.state) {
 194         case DOWNLOAD_DOWNLOADING:
 195             throw interactive_error("Download is already in progress.");
 196         case DOWNLOAD_FINISHED:
 197             throw interactive_error("Download has already completed.");
 198         case DOWNLOAD_FAILED:
 199             throw interactive_error("Download has already failed.");
 200         case DOWNLOAD_CANCELED:
 201             throw interactive_error("Download has already been canceled.");
 202         case DOWNLOAD_PAUSED:
 203             throw interactive_error("Download has already been paused.");
 204         case DOWNLOAD_QUEUED:
 205             throw interactive_error("Download is queued.");
 206         default:
 207             throw new Error("Download has unexpected state: " + this.state);
 208         }
 209     },
 210
 211     // Download manager operations
 212     cancel : function ()  {
 213         this.throw_if_removed();
 214         switch (this.state) {
 215         case DOWNLOAD_DOWNLOADING:
 216         case DOWNLOAD_PAUSED:
 217         case DOWNLOAD_QUEUED:
 218             try {
 219                 download_manager_service.cancelDownload(this.id);
 220             } catch (e) {
 221                 throw interactive_error("Download cannot be canceled.");
 222             }
 223             break;
 224         default:
 225             this.throw_state_error();
 226         }
 227     },
 228
 229     retry : function () {
 230         this.throw_if_removed();
 231         switch (this.state) {
 232         case DOWNLOAD_CANCELED:
 233         case DOWNLOAD_FAILED:
 234             try {
 235                 download_manager_service.retryDownload(this.id);
 236             } catch (e) {
 237                 throw interactive_error("Download cannot be retried.");
 238             }
 239             break;
 240         default:
 241             this.throw_state_error();
 242         }
 243     },
 244
 245     resume : function () {
 246         this.throw_if_removed();
 247         switch (this.state) {
 248         case DOWNLOAD_PAUSED:
 249             try {
 250                 download_manager_service.resumeDownload(this.id);
 251             } catch (e) {
 252                 throw interactive_error("Download cannot be resumed.");
 253             }
 254             break;
 255         default:
 256             this.throw_state_error();
 257         }
 258     },
 259
 260     pause : function () {
 261         this.throw_if_removed();
 262         switch (this.state) {
 263         case DOWNLOAD_DOWNLOADING:
 264         case DOWNLOAD_QUEUED:
 265             try {
 266                 download_manager_service.pauseDownload(this.id);
 267             } catch (e) {
 268                 throw interactive_error("Download cannot be paused.");
 269             }
 270             break;
 271         default:
 272             this.throw_state_error();
 273         }
 274     },
 275
 276     remove : function () {
 277         this.throw_if_removed();
 278         switch (this.state) {
 279         case DOWNLOAD_FAILED:
 280         case DOWNLOAD_CANCELED:
 281         case DOWNLOAD_FINISHED:
 282             try {
 283                 download_manager_service.removeDownload(this.id);
 284             } catch (e) {
 285                 throw interactive_error("Download cannot be removed.");
 286             }
 287             break;
 288         default:
 289             throw interactive_error("Download is still in progress.");
 290         }
 291     },
 292
 293     delete_target : function () {
 294         if (this.state != DOWNLOAD_FINISHED)
 295             throw interactive_error("Download has not finished.");
 296         try {
 297             this.target_file.remove(false);
 298         } catch (e) {
 299             if (result in e) {
 300                 switch (e) {
 301                 case Cr.NS_ERROR_FILE_TARGET_DOES_NOT_EXIST:
 302                     throw interactive_error("File has already been deleted.");
 303                 case Cr.NS_ERROR_FILE_ACCESS_DENIED:
 304                     throw interactive_error("Access denied");
 305                 case Cr.NS_ERROR_FILE_DIR_NOT_EMPTY:
 306                     throw interactive_error("Failed to delete file.");
 307                 }
 308             }
 309             throw e;
 310         }
 311     }
 312 };
 313
 314 var define_download_local_hook = simple_local_hook_definer();
 315
 316 // FIXME: add more parameters
 317 function register_download(buffer, source_uri) {
 318     var info = new download_info(buffer);
 319     info.registered_time_stamp = Date.now();
 320     info.registered_source_uri = source_uri;
 321     unmanaged_download_info_list.push(info);
 322     return info;
 323 }
 324
 325 function match_registered_download(mozilla_info) {
 326     let list = unmanaged_download_info_list;
 327     let t = Date.now();
 328     for (let i = 0; i < list.length; ++i) {
 329         let x = list[i];
 330         if (x.registered_source_uri == mozilla_info.source) {
 331             list.splice(i, 1);
 332             return x;
 333         }
 334         if (t - x.registered_time_stamp > download_info_max_queue_delay) {
 335             list.splice(i, 1);
 336             --i;
 337             continue;
 338         }
 339     }
 340     return null;
 341 }
 342
 343 define_download_local_hook("download_added_hook");
 344 define_download_local_hook("download_removed_hook");
 345 define_download_local_hook("download_finished_hook");
 346 define_download_local_hook("download_progress_change_hook");
 347 define_download_local_hook("download_state_change_hook");
 348 define_download_local_hook("download_shell_command_change_hook");
 349
 350 var download_info_max_queue_delay = 100;
 351
 352 var download_progress_listener = {
 353     QueryInterface: generate_QI(Ci.nsIDownloadProgressListener),
 354
 355     onDownloadStateChange : function (state, download) {
 356         var info = null;
 357         /* FIXME: Determine if only new downloads will have this state
 358          * as their previous state. */
 359
 360         dumpln("download state change: " + download.source.spec + ": " + state + ", " + download.state + ", " + download.id);
 361
 362         if (state == DOWNLOAD_NOTSTARTED) {
 363             info = match_registered_download(download);
 364             if (info == null) {
 365                 info = new download_info(null, download);
 366                 dumpln("error: encountered unknown new download");
 367             } else {
 368                 info.attach(download);
 369             }
 370         } else {
 371             info = id_to_download_info[download.id];
 372             if (info == null) {
 373                 dumpln("Error: encountered unknown download");
 374
 375             } else {
 376                 info.mozilla_info = download;
 377                 download_state_change_hook.run(info);
 378                 if (info.state == DOWNLOAD_FINISHED) {
 379                     download_finished_hook.run(info);
 380
 381                     if (info.shell_command != null) {
 382                         info.running_shell_command = true;
 383                         co_call(function () {
 384                             try {
 385                                 yield shell_command_with_argument(info.shell_command,
 386                                                                   info.target_file.path,
 387                                                                   $cwd = info.shell_command_cwd);
 388                             } finally  {
 389                                 if (info.temporary_status == DOWNLOAD_TEMPORARY_FOR_COMMAND)
 390                                     info.target_file.remove(false /* not recursive */);
 391                                 info.running_shell_command = false;
 392                                 download_shell_command_change_hook.run(info);
 393                             }
 394                         }());
 395                         download_shell_command_change_hook.run(info);
 396                     }
 397                 }
 398             }
 399         }
 400     },
 401
 402     onProgressChange : function (progress, request, cur_self_progress, max_self_progress,
 403                                  cur_total_progress, max_total_progress,
 404                                  download) {
 405         var info = id_to_download_info[download.id];
 406         if (info == null) {
 407             dumpln("error: encountered unknown download in progress change");
 408             return;
 409         }
 410         info.mozilla_info = download;
 411         download_progress_change_hook.run(info);
 412         //dumpln("download progress change: " + download.source.spec + ": " + cur_self_progress + "/" + max_self_progress + " "
 413         // + cur_total_progress + "/" + max_total_progress + ", " + download.state + ", " + download.id);
 414     },
 415
 416     onSecurityChange : function (progress, request, state, download) {
 417     }
 418 };
 419
 420 var download_observer = {
 421     observe : function(subject, topic, data) {
 422         switch(topic) {
 423         case "download-manager-remove-download":
 424             var ids = [];
 425             if (!subject) {
 426                 // Remove all downloads
 427                 for (let i in id_to_download_info)
 428                     ids.push(i);
 429             } else {
 430                 let id = subject.QueryInterface(Ci.nsISupportsPRUint32);
 431                 /* FIXME: determine if this should really be an error */
 432                 if (!(id in id_to_download_info)) {
 433                     dumpln("Error: download-manager-remove-download event received for unknown download: " + id);
 434                 } else
 435                     ids.push(id);
 436             }
 437             for each (let i in ids) {
 438                 dumpln("deleting download: " + i);
 439                 let d = id_to_download_info[i];
 440                 d.removed = true;
 441                 download_removed_hook.run(d);
 442                 delete id_to_download_info[i];
 443             }
 444             break;
 445         }
 446     }
 447 };
 448 observer_service.addObserver(download_observer, "download-manager-remove-download", false);
 449
 450 download_manager_service.addListener(download_progress_listener);
 451
 452 function pretty_print_file_size(val) {
 453     const GIBI = 1073741824; /* 2^30 */
 454     const MEBI = 1048576; /* 2^20 */
 455     const KIBI = 1024; /* 2^10 */
 456     var suffix, div;
 457     if (val < KIBI) {
 458         div = 1;
 459         suffix = "B";
 460     }
 461     else if (val < MEBI) {
 462         suffix = "KiB";
 463         div = KIBI;
 464     } else if (val < GIBI) {
 465         suffix = "MiB";
 466         div = MEBI;
 467     } else {
 468         suffix = "GiB";
 469         div = GIBI;
 470     }
 471     val = val / div;
 472     var precision = 2;
 473     if (val > 10)
 474         precision = 1;
 475     if (val > 100)
 476         precision = 0;
 477     return [val.toFixed(precision), suffix];
 478 }
 479
 480 function pretty_print_time(val) {
 481     val = Math.round(val);
 482     var seconds = val % 60;
 483
 484     val = Math.floor(val / 60);
 485
 486     var minutes = val % 60;
 487
 488     var hours = Math.floor(val / 60);
 489
 490     var parts = [];
 491
 492     if (hours > 1)
 493         parts.push(hours + " hours");
 494     else if (hours == 1)
 495         parts.push("1 hour");
 496
 497     if (minutes > 1)
 498         parts.push(minutes + " minutes");
 499     else if (minutes == 1)
 500         parts.push("1 minute");
 501
 502     if (minutes <= 1 && hours == 0) {
 503         if (seconds != 1)
 504             parts.push(seconds + " seconds");
 505         else
 506             parts.push("1 second");
 507     }
 508
 509     return parts.join(", ");
 510 }
 511
 512 define_variable(
 513     "download_buffer_min_update_interval", 2000,
 514     "Minimum interval (in milliseconds) between updates in download progress buffers.\n" +
 515         "Lowering this interval will increase the promptness of the progress display at " +
 516         "the cost of using additional processor time.");
 517
 518 define_keywords("$info");
 519 function download_buffer(window, element) {
 520     this.constructor_begin();
 521     keywords(arguments);
 522     special_buffer.call(this, window, element, forward_keywords(arguments));
 523     this.info = arguments.$info;
 524     this.configuration.cwd = this.info.mozilla_info.targetFile.parent.path;
 525     this.description = this.info.mozilla_info.source.spec;
 526     this.keymap = download_buffer_keymap;
 527     this.update_title();
 528
 529     this.progress_change_handler_fn = method_caller(this, this.handle_progress_change);
 530     add_hook.call(this.info, "download_progress_change_hook", this.progress_change_handler_fn);
 531     add_hook.call(this.info, "download_state_change_hook", this.progress_change_handler_fn);
 532     this.command_change_handler_fn = method_caller(this, this.update_command_field);
 533     add_hook.call(this.info, "download_shell_command_change_hook", this.command_change_handler_fn);
 534     this.constructor_end();
 535 }
 536 download_buffer.prototype = {
 537     __proto__: special_buffer.prototype,
 538
 539     handle_kill : function () {
 540         this.__proto__.handle_kill();
 541         remove_hook.call(this.info, "download_progress_change_hook", this.progress_change_handler_fn);
 542         remove_hook.call(this.info, "download_state_change_hook", this.progress_change_handler_fn);
 543         remove_hook.call(this.info, "download_shell_command_change_hook", this.command_change_handler_fn);
 544
 545         // Remove all node references
 546         delete this.status_textnode;
 547         delete this.transferred_div_node;
 548         delete this.transferred_textnode;
 549         delete this.progress_container_node;
 550         delete this.progress_bar_node;
 551         delete this.time_textnode;
 552         delete this.command_div_node;
 553         delete this.command_label_textnode;
 554         delete this.command_textnode;
 555     },
 556
 557     update_title : function () {
 558         // FIXME: do this properly
 559         var new_title;
 560         var info = this.info;
 561         var append_transfer_info = false;
 562         var append_speed_info = true;
 563         var label = null;
 564         switch(info.state) {
 565         case DOWNLOAD_DOWNLOADING:
 566             label = "Downloading";
 567             append_transfer_info = true;
 568             break;
 569         case DOWNLOAD_FINISHED:
 570             label = "Download complete";
 571             break;
 572         case DOWNLOAD_FAILED:
 573             label = "Download failed";
 574             append_transfer_info = true;
 575             append_speed_info = false;
 576             break;
 577         case DOWNLOAD_CANCELED:
 578             label = "Download canceled";
 579             append_transfer_info = true;
 580             append_speed_info = false;
 581             break;
 582         case DOWNLOAD_PAUSED:
 583             label = "Download paused";
 584             append_transfer_info = true;
 585             append_speed_info = false;
 586             break;
 587         case DOWNLOAD_QUEUED:
 588         default:
 589             label = "Download queued";
 590             break;
 591         }
 592
 593         if (append_transfer_info) {
 594             if (append_speed_info)
 595                 new_title = label + " at " + pretty_print_file_size(info.speed).join(" ") + "/s: ";
 596             else
 597                 new_title = label + ": ";
 598             var trans = pretty_print_file_size(info.amount_transferred);
 599             if (info.size >= 0) {
 600                 var total = pretty_print_file_size(info.size);
 601                 if (trans[1] == total[1])
 602                     new_title += trans[0] + "/" + total[0] + " " + total[1];
 603                 else
 604                     new_title += trans.join(" ") + "/" + total.join(" ");
 605             } else
 606                 new_title += trans.join(" ");
 607             if (info.percent_complete >= 0)
 608                 new_title += " (" + info.percent_complete + "%)";
 609         } else
 610             new_title = label;
 611         if (new_title != this.title) {
 612             this.title = new_title;
 613             return true;
 614         }
 615         return false;
 616     },
 617
 618     handle_progress_change : function () {
 619         var cur_time = Date.now();
 620         if (this.last_update == null ||
 621             (cur_time - this.last_update) > download_buffer_min_update_interval ||
 622             this.info.state != this.previous_state) {
 623
 624             if (this.update_title())
 625                 buffer_title_change_hook.run(this);
 626
 627             if (this.generated) {
 628                 this.update_fields();
 629             }
 630             this.previous_status = this.info.status;
 631             this.last_update = cur_time;
 632         }
 633     },
 634
 635     generate: function() {
 636         var d = this.document;
 637         var g = new dom_generator(d, XHTML_NS);
 638
 639         /* Warning: If any additional node references are saved in
 640          * this function, appropriate code to delete the saved
 641          * properties must be added to handle_kill. */
 642
 643         var info = this.info;
 644
 645         d.body.setAttribute("class", "download-buffer");
 646
 647         g.add_stylesheet("chrome://conkeror/content/downloads.css");
 648
 649         var div;
 650         var label, value;
 651
 652         div = g.element("div", d.body, "class", "download-info", "id", "download-source");
 653         label = g.element("div", div, "class", "download-label");
 654         this.status_textnode = g.text("", label);
 655         value = g.element("div", div, "class", "download-value");
 656         g.text(info.source.spec, value);
 657
 658         div = g.element("div", d.body, "class", "download-info", "id", "download-target");
 659         label = g.element("div", div, "class", "download-label");
 660         var target_label;
 661         if (info.temporary_status != DOWNLOAD_NOT_TEMPORARY)
 662             target_label = "Temp. file:";
 663         else
 664             target_label = "Target:";
 665         g.text(target_label, label);
 666         value = g.element("div", div, "class", "download-value");
 667         g.text(info.target_file.path, value);
 668
 669         div = g.element("div", d.body, "class", "download-info", "id", "download-mime-type");
 670         label = g.element("div", div, "class", "download-label");
 671         g.text("MIME type:", label);
 672         value = g.element("div", div, "class", "download-value");
 673         g.text(info.MIME_type || "unknown", value);
 674
 675         this.transferred_div_node = div = g.element("div", d.body,
 676                                                     "class", "download-info",
 677                                                     "id", "download-transferred");
 678         label = g.element("div", div, "class", "download-label");
 679         g.text("Transferred:", label);
 680         value = g.element("div", div, "class", "download-value");
 681         this.transferred_textnode = g.text("", value);
 682         this.progress_container_node = value = g.element("div", div, "id", "download-progress-container");
 683         this.progress_bar_node = g.element("div", value, "id", "download-progress-bar");
 684         value = g.element("div", div, "class", "download-value", "id", "download-percent");
 685         this.percent_textnode = g.text("", value);
 686
 687         div = g.element("div", d.body, "class", "download-info", "id", "download-time");
 688         label = g.element("div", div, "class", "download-label");
 689         g.text("Time:", label);
 690         value = g.element("div", div, "class", "download-value");
 691         this.time_textnode = g.text("", value);
 692
 693         if (info.action_description != null) {
 694             div = g.element("div", d.body, "class", "download-info", "id", "download-action");
 695             label = g.element("div", div, "class", "download-label");
 696             g.text("Action:", label);
 697             value = g.element("div", div, "class", "download-value");
 698             g.text(info.action_description, value);
 699         }
 700
 701         this.command_div_node = div = g.element("div", d.body, "class", "download-info", "id", "download-command");
 702         label = g.element("div", div, "class", "download-label");
 703         this.command_label_textnode = g.text("Run command:", label);
 704         value = g.element("div", div, "class", "download-value");
 705         this.command_textnode = g.text("", value);
 706
 707         this.update_fields();
 708
 709         this.update_command_field();
 710     },
 711
 712     update_fields : function () {
 713         if (!this.generated)
 714             return;
 715         var info = this.info;
 716         var label = null;
 717         switch(info.state) {
 718         case DOWNLOAD_DOWNLOADING:
 719             label = "Downloading";
 720             break;
 721         case DOWNLOAD_FINISHED:
 722             label = "Completed";
 723             break;
 724         case DOWNLOAD_FAILED:
 725             label = "Failed";
 726             break;
 727         case DOWNLOAD_CANCELED:
 728             label = "Canceled";
 729             break;
 730         case DOWNLOAD_PAUSED:
 731             label = "Paused";
 732             break;
 733         case DOWNLOAD_QUEUED:
 734         default:
 735             label = "Queued";
 736             break;
 737         }
 738         this.status_textnode.nodeValue = label + ":";
 739         this.update_time_field();
 740
 741         var tran_text = "";
 742         if (info.state == DOWNLOAD_FINISHED)
 743             tran_text = pretty_print_file_size(info.size).join(" ");
 744         else {
 745             var trans = pretty_print_file_size(info.amount_transferred);
 746             if (info.size >= 0) {
 747                 var total = pretty_print_file_size(info.size);
 748                 if (trans[1] == total[1])
 749                     tran_text += trans[0] + "/" + total[0] + " " + total[1];
 750                 else
 751                     tran_text += trans.join(" ") + "/" + total.join(" ");
 752             } else
 753                 tran_text += trans.join(" ");
 754         }
 755         this.transferred_textnode.nodeValue = tran_text;
 756         if (info.percent_complete >= 0) {
 757             this.progress_container_node.style.display = "";
 758             this.percent_textnode.nodeValue = info.percent_complete + "%";
 759             this.progress_bar_node.style.width = info.percent_complete + "%";
 760         } else {
 761             this.percent_textnode.nodeValue = "";
 762             this.progress_container_node.style.display = "none";
 763         }
 764
 765         this.update_command_field();
 766     },
 767
 768     update_time_field : function () {
 769         var info = this.info;
 770         var elapsed_text = pretty_print_time((Date.now() - info.start_time / 1000) / 1000) + " elapsed";
 771         var text = "";
 772         if (info.state == DOWNLOAD_DOWNLOADING) {
 773             text = pretty_print_file_size(info.speed).join(" ") + "/s, ";
 774         }
 775         if (info.state == DOWNLOAD_DOWNLOADING &&
 776             info.size >= 0 &&
 777             info.speed > 0) {
 778             let remaining = (info.size - info.amount_transferred) / info.speed;
 779             text += pretty_print_time(remaining) + " left (" + elapsed_text + ")";
 780         } else {
 781             text = elapsed_text;
 782         }
 783         this.time_textnode.nodeValue = text;
 784     },
 785
 786     update_command_field : function () {
 787         if (!this.generated)
 788             return;
 789         if (this.info.shell_command != null) {
 790             this.command_div_node.style.display = "";
 791             var label;
 792             if (this.info.running_shell_command)
 793                 label = "Running:";
 794             else if (this.info.state == DOWNLOAD_FINISHED)
 795                 label = "Ran command:";
 796             else
 797                 label = "Run command:";
 798             this.command_label_textnode.nodeValue = label;
 799             this.command_textnode.nodeValue = this.info.shell_command;
 800         } else {
 801             this.command_div_node.style.display = "none";
 802         }
 803     }
 804 };
 805
 806 function download_cancel(buffer) {
 807     check_buffer(buffer, download_buffer);
 808     var info = buffer.info;
 809     info.cancel();
 810     buffer.window.minibuffer.message("Download canceled");
 811 }
 812 interactive("download-cancel",
 813             "Cancel the current download.\n" +
 814             "The download can later be retried using the `download-retry' command, but any " +
 815             "data already transferred will be lost.",
 816             function (I) {download_cancel(I.buffer);});
 817
 818 function download_retry(buffer) {
 819     check_buffer(buffer, download_buffer);
 820     var info = buffer.info;
 821     info.retry();
 822     buffer.window.minibuffer.message("Download retried");
 823 }
 824 interactive("download-retry",
 825             "Retry a failed or canceled download.\n" +
 826             "This command can be used to retry a download that failed or was cancled using " +
 827             "the `download-cancel' command.  The download will begin from the start again.",
 828             function (I) {download_retry(I.buffer);});
 829
 830 function download_pause(buffer) {
 831     check_buffer(buffer, download_buffer);
 832     buffer.info.pause();
 833     buffer.window.minibuffer.message("Download paused");
 834 }
 835 interactive("download-pause",
 836             "Pause the current download.\n" +
 837             "The download can later be resumed using the `download-resume' command.  The " +
 838             "data already transferred will not be lost.",
 839             function (I) {download_pause(I.buffer);});
 840
 841 function download_resume(buffer) {
 842     check_buffer(buffer, download_buffer);
 843     buffer.info.resume();
 844     buffer.window.minibuffer.message("Download resumed");
 845 }
 846 interactive("download-resume",
 847             "Resume the current download.\n" +
 848             "This command can be used to resume a download paused using the `download-pause' command.",
 849             function (I) {download_resume(I.buffer);});
 850
 851 function download_remove(buffer) {
 852     check_buffer(buffer, download_buffer);
 853     buffer.info.remove();
 854     buffer.window.minibuffer.message("Download removed");
 855 }
 856 interactive("download-remove",
 857             "Remove the current download from the download manager.\n" +
 858             "This command can only be used on inactive (paused, canceled, completed, or failed) downloads.",
 859             function (I) {download_remove(I.buffer);});
 860
 861 function download_retry_or_resume(buffer) {
 862     check_buffer(buffer, download_buffer);
 863     var info = buffer.info;
 864     if (info.state == DOWNLOAD_PAUSED)
 865         download_resume(buffer);
 866     else
 867         download_retry(buffer);
 868 }
 869 interactive("download-retry-or-resume",
 870             "Retry or resume the current download.\n" +
 871             "This command can be used to resume a download paused using the `download-pause' " +
 872             "command or canceled using the `download-cancel' command.",
 873             function (I) {download_retry_or_resume(I.buffer);});
 874
 875 function download_pause_or_resume(buffer) {
 876     check_buffer(buffer, download_buffer);
 877     var info = buffer.info;
 878     if (info.state == DOWNLOAD_PAUSED)
 879         download_resume(buffer);
 880     else
 881         download_pause(buffer);
 882 }
 883 interactive("download-pause-or-resume",
 884             "Pause or resume the current download.\n" +
 885             "This command toggles the paused state of the current download.",
 886             function (I) {download_pause_or_resume(I.buffer);});
 887
 888 function download_delete_target(buffer) {
 889     check_buffer(buffer, download_buffer);
 890     var info = buffer.info;
 891     info.delete_target();
 892     buffer.window.minibuffer.message("Deleted file: " + info.target_file.path);
 893 }
 894 interactive("download-delete-target",
 895             "Delete the target file of the current download.\n"  +
 896             "This command can only be used if the download has finished successfully.",
 897             function (I) {download_delete_target(I.buffer);});
 898
 899 function download_shell_command(buffer, cwd, cmd) {
 900     check_buffer(buffer, download_buffer);
 901     var info = buffer.info;
 902     if (info.state == DOWNLOAD_FINISHED) {
 903         shell_command_with_argument_blind(cmd, info.target_file.path, $cwd = cwd);
 904         return;
 905     }
 906     if (info.state != DOWNLOAD_DOWNLOADING && info.state != DOWNLOAD_PAUSED && info.state != DOWNLOAD_QUEUED)
 907         info.throw_state_error();
 908     if (cmd == null || cmd.length == 0)
 909         info.set_shell_command(null, cwd);
 910     else
 911         info.set_shell_command(cmd, cwd);
 912     buffer.window.minibuffer.message("Queued shell command: " + cmd);
 913 }
 914 interactive("download-shell-command",
 915             "Run a shell command on the target file of the current download.\n" +
 916             "If the download is still in progress, the shell command will be queued " +
 917             "to run when the download finishes.",
 918             function (I) {
 919                 var buffer = check_buffer(I.buffer, download_buffer);
 920                 var cwd = buffer.info.shell_command_cwd || buffer.cwd;
 921                 var cmd = yield I.minibuffer.read_shell_command(
 922                     $cwd = cwd,
 923                     $initial_value = buffer.info.shell_command ||
 924                         get_external_handler_for_mime_type(buffer.info.MIME_type));
 925                 download_shell_command(buffer, cwd, cmd);
 926             });
 927
 928 function download_manager_ui()
 929 {}
 930 download_manager_ui.prototype = {
 931     QueryInterface : XPCOMUtils.generateQI([Ci.nsIDownloadManagerUI]),
 932
 933     getAttention : function () {},
 934     show : function () {},
 935     visible : false
 936 };
 937
 938
 939 function download_manager_show_builtin_ui(window) {
 940     download_manager_builtin_ui.show(window);
 941 }
 942 interactive("download-manager-show-builtin-ui",
 943             "Show the built-in (Firefox-style) download manager user interface.",
 944             function (I) {download_manager_show_builtin_ui(I.window);});
 945
 946
 947
 948 define_variable("download_temporary_file_open_buffer_delay", 500,
 949                      "Delay (in milliseconds) before a download buffer is opened for temporary downloads.\n" +
 950                      "This variable takes effect only if `open_download_buffer_automatically' is in " +
 951                      "`download_added_hook', as it is by default.");
 952
 953
 954 define_variable("download_buffer_automatic_open_target", OPEN_NEW_WINDOW,
 955                      "Target for download buffers created by the `open_download_buffer_automatically' function.\n" +
 956                      "This variable takes effect only if `open_download_buffer_auotmatically' is in " +
 957                      "`download_added_hook', as it is by default.");
 958
 959 function open_download_buffer_automatically(info) {
 960     var buf = info.source_buffer;
 961     var target = download_buffer_automatic_open_target;
 962     if (buf == null)
 963         target = OPEN_NEW_WINDOW;
 964     if (info.temporary_status == DOWNLOAD_NOT_TEMPORARY ||
 965         !(download_temporary_file_open_buffer_delay > 0))
 966         create_buffer(buf, buffer_creator(download_buffer, $info = info), target);
 967     else {
 968         var timer = null;
 969         function finish() {
 970             timer.cancel();
 971         }
 972         add_hook.call(info, "download_finished_hook", finish);
 973         timer = call_after_timeout(function () {
 974                 remove_hook.call(info, "download_finished_hook", finish);
 975                 create_buffer(buf, buffer_creator(download_buffer, $info = info), target);
 976             }, download_temporary_file_open_buffer_delay);
 977     }
 978 }
 979 add_hook("download_added_hook", open_download_buffer_automatically);