modules/commands.js

   1 /**
   2  * (C) Copyright 2004-2007 Shawn Betts
   3  * (C) Copyright 2007-2010 John J. Foerch
   4  * (C) Copyright 2007-2008 Jeremy Maitin-Shepard
   5  *
   6  * Use, modification, and distribution are subject to the terms specified in the
   7  * COPYING file.
   8 **/
   9
  10 define_coroutine_hook("before_quit_hook", RUN_HOOK_UNTIL_FAILURE);
  11 define_hook("quit_hook");
  12
  13 function quit () {
  14     var res = yield before_quit_hook.run();
  15     if (res) {
  16         quit_hook.run();
  17         var appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
  18             .getService(Ci.nsIAppStartup);
  19         appStartup.quit(appStartup.eAttemptQuit);
  20     }
  21 }
  22 interactive("quit", "Quit Conkeror", quit);
  23
  24
  25 function show_conkeror_version (window) {
  26     var xulrunner_version = Cc['@mozilla.org/xre/app-info;1']
  27         .getService(Ci.nsIXULAppInfo)
  28         .platformVersion;
  29     window.minibuffer.message("Conkeror "+conkeror.version+
  30                               " (XULRunner "+xulrunner_version+
  31                               ", "+get_os()+")");
  32 }
  33 interactive("conkeror-version",
  34     "Show version information for Conkeror.",
  35     function (I) { show_conkeror_version(I.window); });
  36 interactive("version",
  37     "Show version information for Conkeror.",
  38     "conkeror-version");
  39
  40 /* FIXME: maybe this should be supported for non-browser buffers */
  41 function scroll_horiz_complete (buffer, n) {
  42     var w = buffer.focused_frame;
  43     w.scrollTo (n > 0 ? w.scrollMaxX : 0, w.scrollY);
  44 }
  45 interactive("scroll-beginning-of-line",
  46     "Scroll the current frame all the way to the left.",
  47     function (I) { scroll_horiz_complete(I.buffer, -1); });
  48
  49 interactive("scroll-end-of-line",
  50     "Scroll the current frame all the way to the right.",
  51     function (I) { scroll_horiz_complete(I.buffer, 1); });
  52
  53 interactive("scroll-top-left",
  54     "Scroll the current frame all the way to the top left",
  55      function (I) { I.buffer.do_command("cmd_scrollTop");
  56                     scroll_horiz_complete(I.buffer, -1); });
  57
  58
  59 function delete_window (window) {
  60     window.window.close();
  61 }
  62 interactive("delete-window",
  63     "Delete the current window.",
  64     function (I) { delete_window(I.window); });
  65
  66 interactive("jsconsole",
  67     "Open the JavaScript console.",
  68     "find-url-new-buffer",
  69     $browser_object = "chrome://global/content/console.xul");
  70
  71
  72 function paste_x_primary_selection (field) {
  73     modify_region(field, function (str) read_from_x_primary_selection());
  74 }
  75 interactive("paste-x-primary-selection",
  76     "Insert the contents of the X primary selection into the selected field or "+
  77     "minibuffer. Deactivates the region if it is active, and leaves the point "+
  78     "after the inserted text.",
  79     function (I) call_on_focused_field(I, paste_x_primary_selection, true));
  80
  81
  82 function open_line (field) {
  83     modify_region(field, function() ["\n", 0]);
  84 }
  85 interactive("open-line",
  86     "If there is an active region, replace is with a newline, otherwise just "+
  87     "insert a newline. In both cases leave point before the inserted newline.",
  88     function (I) call_on_focused_field(I, open_line, true));
  89
  90
  91 interactive("insert-parentheses",
  92     "Insert a pair of parentheses, or surround the currently selected text "+
  93     "with a pair of parentheses.",
  94     function (I) {
  95         call_on_focused_field(I, function (field) {
  96             modify_region(field,
  97                           function (str) {
  98                               return ["("+str+")", (str ? str.length+2 : 1)];
  99                           });
 100         }, true);
 101     });
 102
 103
 104 function transpose_chars (field) {
 105     var value = field.value;
 106     var caret = field.selectionStart; // Caret position.
 107     var length = value.length;
 108
 109     // If we have less than two character in the field or if we are at the
 110     // beginning of the field, do nothing.
 111     if (length < 2 || caret == 0)
 112         return;
 113
 114     // If we are at the end of the field, switch places on the two last
 115     // characters. TODO: This should happen at the end of every line, not only
 116     // at the end of the field.
 117     if (caret == length)
 118         caret--;
 119
 120     // Do the transposing.
 121     field.value = switch_subarrays(value, caret - 1, caret, caret, caret + 1);
 122
 123     // Increment the caret position. If this is not done, the caret is left at
 124     // the end of the field as a result of the replacing of contents.
 125     field.selectionStart = caret + 1;
 126     field.selectionEnd = caret + 1;
 127 }
 128 interactive("transpose-chars",
 129     "Interchange characters around point, moving forward one character.",
 130     function (I) call_on_focused_field(I, transpose_chars, true));
 131
 132
 133 interactive("execute-extended-command",
 134     "Call a command specified in the minibuffer.",
 135     function (I) {
 136         var prefix = I.P;
 137         var boc = I.browser_object;
 138         var prompt = "M-x";
 139         if (I.key_sequence)
 140             prompt = I.key_sequence.join(" ");
 141         if (boc)
 142             prompt += ' ['+boc.name+']';
 143         if (prefix !== null && prefix !== undefined) {
 144             if (typeof prefix == "object")
 145                 prompt += prefix[0] == 4 ? " C-u" : " "+prefix[0];
 146             else
 147                 prompt += " "+prefix;
 148         }
 149         var command = yield I.minibuffer.read_command($prompt = prompt);
 150         call_after_timeout(function () {
 151             input_handle_command.call(I.window, new command_event(command));
 152         }, 0);
 153     },
 154     $prefix = true);
 155
 156
 157 /// built in commands
 158 // see: http://www.xulplanet.com/tutorials/xultu/commandupdate.html
 159
 160 // Performs a command on a browser buffer content area
 161
 162
 163 define_builtin_commands(
 164     "",
 165     function (I, command) {
 166         call_builtin_command(I.window, command);
 167     },
 168     false
 169 );
 170
 171 define_builtin_commands(
 172     "caret-",
 173     function (I, command) {
 174         var buffer = I.buffer;
 175         try {
 176             buffer.do_command(command);
 177         } catch (e) {
 178             /* Ignore exceptions */
 179         }
 180     },
 181     'caret');
 182
 183 function get_link_text () {
 184     var e = document.commandDispatcher.focusedElement;
 185     if (e && e.getAttribute("href")) {
 186         return e.getAttribute("href");
 187     }
 188     return null;
 189 }
 190
 191
 192 /*
 193 function copy_email_address (loc)
 194 {
 195     // Copy the comma-separated list of email addresses only.
 196     // There are other ways of embedding email addresses in a mailto:
 197     // link, but such complex parsing is beyond us.
 198     var qmark = loc.indexOf( "?" );
 199     var addresses;
 200
 201     if ( qmark > 7 ) {                   // 7 == length of "mailto:"
 202         addresses = loc.substring( 7, qmark );
 203     } else {
 204         addresses = loc.substr( 7 );
 205     }
 206
 207     //XXX: the original code, which we got from firefox, unescapes the string
 208     //     using the current character set.  To do this in conkeror, we
 209     //     *should* use an interactive method that gives us the character set,
 210     //     rather than fetching it by side-effect.
 211
 212     //     // Let's try to unescape it using a character set
 213     //     // in case the address is not ASCII.
 214     //     try {
 215     //         var characterSet = this.target.ownerDocument.characterSet;
 216     //         const textToSubURI = Components.classes["@mozilla.org/intl/texttosuburi;1"]
 217     //             .getService(Components.interfaces.nsITextToSubURI);
 218     //         addresses = textToSubURI.unEscapeURIForUI(characterSet, addresses);
 219     //     }
 220     //     catch(ex) {
 221     //         // Do nothing.
 222     //     }
 223
 224     writeToClipboard(addresses);
 225     message("Copied '" + addresses + "'");
 226 }
 227 interactive("copy-email-address", copy_email_address, ['focused_link_url']);
 228 */
 229
 230 /* FIXME: fix this command */
 231 /*
 232 interactive("source",
 233             "Load a JavaScript file.",
 234             function (fo) { load_rc (fo.path); }, [['f', function (a) { return "Source File: "; }, null, "source"]]);
 235 */
 236 function reinit (window) {
 237     try {
 238         var obs = Cc["@mozilla.org/observer-service;1"]
 239             .getService(Ci.nsIObserverService);
 240         obs.notifyObservers(null, "startupcache-invalidate", null);
 241         var path = load_rc();
 242         window.minibuffer.message("Loaded: " + path);
 243     } catch (e) {
 244         window.minibuffer.message("Failed to load: "+path);
 245     }
 246 }
 247
 248 interactive("reinit",
 249             "Reload the Conkeror rc file.",
 250             function (I) { reinit(I.window); });
 251
 252 interactive("help-page", "Open the Conkeror help page.",
 253             "find-url-new-buffer",
 254             $browser_object = "chrome://conkeror-help/content/help.html");
 255
 256 interactive("tutorial", "Open the Conkeror tutorial.",
 257             "find-url-new-buffer",
 258             $browser_object = "chrome://conkeror-help/content/tutorial.html");
 259
 260 function univ_arg_to_number (prefix, default_value) {
 261     if (prefix == null) {
 262         if (default_value == null)
 263             return 1;
 264         else
 265             return default_value;
 266     }
 267     if (typeof prefix == "object")
 268         return prefix[0];
 269     return prefix;
 270 }
 271
 272
 273 interactive("eval-expression",
 274     "Evaluate JavaScript statements.",
 275     function (I) {
 276         var s = yield I.minibuffer.read(
 277             $prompt = "Eval:",
 278             $history = "eval-expression",
 279             $completer = javascript_completer(I.buffer));
 280         var result = evaluate(s);
 281         if (result !== undefined)
 282             I.window.minibuffer.message(String(result));
 283     });
 284
 285
 286 function show_extension_manager () {
 287     return conkeror.window_watcher.openWindow(
 288         null,
 289         "chrome://mozapps/content/extensions/extensions.xul?type=extensions",
 290         "ExtensionsWindow",
 291         "resizable=yes,dialog=no",
 292         null);
 293 }
 294 interactive("extensions",
 295     "Open the extensions manager in a new window.",
 296     show_extension_manager);
 297
 298 function print_buffer (buffer) {
 299     buffer.top_frame.print();
 300 }
 301
 302 interactive("print-buffer",
 303     "Print the currently loaded page.",
 304     function (I) { print_buffer(I.buffer); });
 305
 306 function view_partial_source (window, charset, selection) {
 307     if (charset)
 308         charset = "charset=" + charset;
 309     window.window.openDialog("chrome://global/content/viewPartialSource.xul",
 310                              "_blank", "scrollbars,resizable,chrome,dialog=no",
 311                              null, charset, selection, 'selection');
 312 }
 313 //interactive ('view-partial-source', view_partial_source, I.current_window, I.content_charset, I.content_selection);
 314
 315
 316 function  view_mathml_source (window, charset, target) {
 317     if (charset)
 318         charset = "charset=" + charset;
 319     window.window.openDialog("chrome://global/content/viewPartialSource.xul",
 320                              "_blank", "scrollbars,resizable,chrome,dialog=no",
 321                              null, charset, target, 'mathml');
 322 }
 323
 324
 325 function send_key_as_event (window, element, combo) {
 326     var split = unformat_key_combo(combo);
 327     var event = window.document.createEvent("KeyboardEvent");
 328     event.initKeyEvent(
 329         "keypress",
 330         true,
 331         true,
 332         null,
 333         split.ctrlKey,
 334         split.altKey,
 335         split.shiftKey,
 336         split.metaKey,
 337         split.keyCode,
 338         split.charCode);
 339     if (element) {
 340         return element.dispatchEvent(event);
 341     } else {
 342         return window.dispatchEvent(event);
 343     }
 344 }
 345
 346
 347 function ensure_content_focused (buffer) {
 348     var foc = buffer.focused_frame_or_null;
 349     if (!foc)
 350         buffer.top_frame.focus();
 351 }
 352 interactive("ensure-content-focused", "Ensure that the content document has focus.",
 353     function (I) { ensure_content_focused(I.buffer); });
 354
 355
 356 function network_set_online_status (status) {
 357     const io_service = Cc["@mozilla.org/network/io-service;1"]
 358         .getService(Ci.nsIIOService2);
 359     status = !status;
 360     io_service.manageOfflineStatus = false;
 361     io_service.offline = status;
 362 }
 363 interactive("network-go-online", "Work online.",
 364     function (I) { network_set_online_status(true); });
 365
 366 interactive("network-go-offline", "Work offline.",
 367     function (I) { network_set_online_status(false); });
 368
 369
 370 interactive("submit-form",
 371     "Submit the form to which the focused element belongs.",
 372     function (I) {
 373         var el = I.buffer.focused_element.parentNode;
 374         while (el && el.tagName != "FORM")
 375             el = el.parentNode;
 376         if (el) {
 377             var inputs = el.getElementsByTagName("input");
 378             for (var i = 0, ilen = inputs.length; i < ilen; i++) {
 379                 if (inputs[i].getAttribute("type") == "submit")
 380                     return browser_object_follow(I.buffer, FOLLOW_DEFAULT,
 381                                                  inputs[i]);
 382             }
 383             el.submit();
 384         }
 385     });
 386
 387
 388 /*
 389  * Browser Object Commands
 390  */
 391 interactive("follow", null,
 392     alternates(follow, follow_new_buffer, follow_new_window),
 393     $browser_object = browser_object_links);
 394
 395 interactive("follow-top", null,
 396     alternates(follow_current_buffer, follow_current_frame),
 397     $browser_object = browser_object_frames,
 398     $prompt = "Follow");
 399
 400 interactive("follow-new-buffer",
 401     "Follow a link in a new buffer",
 402     alternates(follow_new_buffer, follow_new_window),
 403     $browser_object = browser_object_links,
 404     $prompt = "Follow");
 405
 406 interactive("follow-new-buffer-background",
 407     "Follow a link in a new buffer in the background",
 408     alternates(follow_new_buffer_background, follow_new_window),
 409     $browser_object = browser_object_links,
 410     $prompt = "Follow");
 411
 412 interactive("follow-new-window",
 413     "Follow a link in a new window",
 414     follow_new_window,
 415     $browser_object = browser_object_links,
 416     $prompt = "Follow");
 417
 418 interactive("find-url", "Open a URL in the current buffer",
 419     alternates(follow_current_buffer, follow_new_buffer, follow_new_window),
 420     $browser_object = browser_object_url);
 421
 422 interactive("find-url-new-buffer",
 423     "Open a URL in a new buffer",
 424     alternates(follow_new_buffer, follow_new_window),
 425     $browser_object = browser_object_url,
 426     $prompt = "Find url");
 427
 428 interactive("find-url-new-window", "Open a URL in a new window",
 429     follow_new_window,
 430     $browser_object = browser_object_url,
 431     $prompt = "Find url");
 432
 433 interactive("find-alternate-url", "Edit the current URL in the minibuffer",
 434     "find-url",
 435     $browser_object =
 436         define_browser_object_class("alternate-url", null,
 437             function (I, prompt) {
 438                 check_buffer(I.buffer, content_buffer);
 439                 var result = yield I.buffer.window.minibuffer.read_url(
 440                     $prompt = prompt,
 441                     $initial_value = I.buffer.display_uri_string);
 442                 yield co_return(result);
 443             }),
 444     $prompt = "Find url");
 445
 446
 447 interactive("up", "Go to the parent directory of the current URL",
 448     "find-url",
 449     $browser_object = browser_object_up_url);
 450
 451 interactive("home",
 452     "Go to the homepage in the current buffer.", "follow",
 453     $browser_object = function () { return homepage; });
 454
 455 interactive("make-window",
 456     "Make a new window with the homepage.",
 457     follow_new_window,
 458     $browser_object = function () { return homepage; });
 459
 460 interactive("focus", null,
 461     function (I) {
 462         var element = yield read_browser_object(I);
 463         browser_element_focus(I.buffer, element);
 464     },
 465     $browser_object = browser_object_frames);
 466
 467 interactive("save",
 468     "Save a browser object.",
 469     function (I) {
 470         var element = yield read_browser_object(I);
 471         var spec = load_spec(element);
 472         var panel;
 473         panel = create_info_panel(I.window, "download-panel",
 474                                   [["downloading",
 475                                     element_get_operation_label(element, "Saving"),
 476                                     load_spec_uri_string(spec)],
 477                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 478         try {
 479             var file = yield I.minibuffer.read_file_check_overwrite(
 480                 $prompt = "Save as:",
 481                 $initial_value = suggest_save_path_from_file_name(suggest_file_name(spec), I.buffer),
 482                 $history = "save");
 483         } finally {
 484             panel.destroy();
 485         }
 486         save_uri(spec, file,
 487                  $buffer = I.buffer,
 488                  $use_cache = false);
 489     },
 490     $browser_object = browser_object_links);
 491
 492
 493 interactive("copy", null,
 494             alternates(copy_text, copy_text_append),
 495             $browser_object = browser_object_links);
 496
 497 interactive("paste-url", "Open a URL from the clipboard in the current buffer.",
 498             alternates(follow_current_buffer, follow_new_buffer, follow_new_window),
 499             $browser_object = browser_object_paste_url);
 500
 501 interactive("paste-url-new-buffer", "Open a URL from the clipboard in a new buffer.",
 502             alternates(follow_new_buffer, follow_new_window),
 503             $browser_object = browser_object_paste_url);
 504
 505 interactive("paste-url-new-window", "Open a URL from the clipboard in a new window.",
 506             follow_new_window,
 507             $browser_object = browser_object_paste_url);
 508
 509 interactive("view-source",
 510             "Toggle between source and rendered views of a URL.",
 511             alternates(view_source, view_source_new_buffer, view_source_new_window),
 512             $browser_object = browser_object_frames);
 513
 514
 515 interactive("shell-command-on-url",
 516     "Run a shell command on the url of a browser object.",
 517     function (I) {
 518         var cwd = I.local.cwd;
 519         var element = yield read_browser_object(I);
 520         var spec = load_spec(element);
 521         var uri = load_spec_uri_string(spec);
 522         var panel;
 523         panel = create_info_panel(I.window, "download-panel",
 524                                   [["downloading",
 525                                     element_get_operation_label(element, "Running on", "URI"),
 526                                     load_spec_uri_string(spec)],
 527                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 528         try {
 529             var cmd = yield I.minibuffer.read_shell_command(
 530                 $cwd = cwd,
 531                 $initial_value = load_spec_default_shell_command(spec));
 532         } finally {
 533             panel.destroy();
 534         }
 535         shell_command_with_argument_blind(cmd, uri, $cwd = cwd);
 536     },
 537     $browser_object = browser_object_url,
 538     $prompt = "Shell command");
 539
 540
 541 interactive("shell-command-on-file",
 542     "Download a document to a temporary file and run a shell command on it.",
 543     function (I) {
 544         var cwd = I.local.cwd;
 545         var element = yield read_browser_object(I);
 546         var spec = load_spec(element);
 547         var uri = load_spec_uri_string(spec);
 548         var panel;
 549         panel = create_info_panel(I.window, "download-panel",
 550                                   [["downloading",
 551                                     element_get_operation_label(element, "Running on"),
 552                                     load_spec_uri_string(spec)],
 553                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 554         try {
 555             var cmd = yield I.minibuffer.read_shell_command(
 556                 $cwd = cwd,
 557                 $initial_value = load_spec_default_shell_command(spec));
 558         } finally {
 559             panel.destroy();
 560         }
 561         yield browser_element_shell_command(I.buffer, element, cmd, cwd);
 562     },
 563     $browser_object = browser_object_links,
 564     $prompt = "Shell command");
 565
 566
 567 interactive("bookmark",
 568     "Create a bookmark.",
 569     function (I) {
 570         var element = yield read_browser_object(I);
 571         var spec = load_spec(element);
 572         var uri_string = load_spec_uri_string(spec);
 573         var panel;
 574         panel = create_info_panel(I.window, "bookmark-panel",
 575                                   [["bookmarking",
 576                                     element_get_operation_label(element, "Bookmarking"),
 577                                     uri_string]]);
 578         try {
 579             var title = yield I.minibuffer.read($prompt = "Bookmark with title:", $initial_value = load_spec_title(spec) || "");
 580         } finally {
 581             panel.destroy();
 582         }
 583         add_bookmark(uri_string, title);
 584         I.minibuffer.message("Added bookmark: " + uri_string + " - " + title);
 585     },
 586     $browser_object = browser_object_frames);
 587
 588
 589 interactive("save-page",
 590     "Save a document, not including any embedded documents such as images "+
 591     "and css.",
 592     function (I) {
 593         check_buffer(I.buffer, content_buffer);
 594         var element = yield read_browser_object(I);
 595         var spec = load_spec(element);
 596         if (!load_spec_document(spec))
 597             throw interactive_error("Element is not associated with a document.");
 598         var suggested_path = suggest_save_path_from_file_name(suggest_file_name(spec), I.buffer);
 599
 600         var panel;
 601         panel = create_info_panel(I.window, "download-panel",
 602                                   [["downloading",
 603                                     element_get_operation_label(element, "Saving"),
 604                                     load_spec_uri_string(spec)],
 605                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 606
 607         try {
 608             var file = yield I.minibuffer.read_file_check_overwrite(
 609                 $prompt = "Save page as:",
 610                 $history = "save",
 611                 $initial_value = suggested_path);
 612         } finally {
 613             panel.destroy();
 614         }
 615
 616         save_uri(spec, file, $buffer = I.buffer);
 617     },
 618     $browser_object = browser_object_frames);
 619
 620
 621 interactive("save-page-as-text",
 622     "Save a page as plain text.",
 623     function (I) {
 624         check_buffer(I.buffer, content_buffer);
 625         var element = yield read_browser_object(I);
 626         var spec = load_spec(element);
 627         var doc;
 628         if (!(doc = load_spec_document(spec)))
 629             throw interactive_error("Element is not associated with a document.");
 630         var suggested_path = suggest_save_path_from_file_name(suggest_file_name(spec, "txt"), I.buffer);
 631
 632         var panel;
 633         panel = create_info_panel(I.window, "download-panel",
 634                                   [["downloading",
 635                                     element_get_operation_label(element, "Saving", "as text"),
 636                                     load_spec_uri_string(spec)],
 637                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 638
 639         try {
 640             var file = yield I.minibuffer.read_file_check_overwrite(
 641                 $prompt = "Save page as text:",
 642                 $history = "save",
 643                 $initial_value = suggested_path);
 644         } finally {
 645             panel.destroy();
 646         }
 647
 648         save_document_as_text(doc, file, $buffer = I.buffer);
 649     },
 650     $browser_object = browser_object_frames);
 651
 652
 653 interactive("save-page-complete",
 654     "Save a page and all supporting documents, including images, css, "+
 655     "and child frame documents.",
 656     function (I) {
 657         check_buffer(I.buffer, content_buffer);
 658         var element = yield read_browser_object(I);
 659         var spec = load_spec(element);
 660         var doc;
 661         if (!(doc = load_spec_document(spec)))
 662             throw interactive_error("Element is not associated with a document.");
 663         var suggested_path = suggest_save_path_from_file_name(suggest_file_name(spec), I.buffer);
 664
 665         var panel;
 666         panel = create_info_panel(I.window, "download-panel",
 667                                   [["downloading",
 668                                     element_get_operation_label(element, "Saving complete"),
 669                                     load_spec_uri_string(spec)],
 670                                    ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 671
 672         try {
 673             var file = yield I.minibuffer.read_file_check_overwrite(
 674                 $prompt = "Save page complete:",
 675                 $history = "save",
 676                 $initial_value = suggested_path);
 677             // FIXME: use proper read function
 678             var dir = yield I.minibuffer.read_file(
 679                 $prompt = "Data Directory:",
 680                 $history = "save",
 681                 $initial_value = file.path + ".support");
 682         } finally {
 683             panel.destroy();
 684         }
 685
 686         save_document_complete(doc, file, dir, $buffer = I.buffer);
 687     },
 688     $browser_object = browser_object_frames);
 689
 690
 691 function view_as_mime_type (I, target) {
 692     I.target = target;
 693     var element = yield read_browser_object(I);
 694     var spec = load_spec(element);
 695
 696     if (target == null)
 697         target = FOLLOW_CURRENT_FRAME;
 698
 699     if (!can_override_mime_type_for_uri(load_spec_uri(spec)))
 700         throw interactive_error("Overriding the MIME type is not currently supported for non-HTTP URLs.");
 701
 702     var panel;
 703
 704     var mime_type = load_spec_mime_type(spec);
 705     panel = create_info_panel(I.window, "download-panel",
 706                               [["downloading",
 707                                 element_get_operation_label(element, "View in browser"),
 708                                 load_spec_uri_string(spec)],
 709                                ["mime-type", "Mime type:", load_spec_mime_type(spec)]]);
 710
 711
 712     try {
 713         let suggested_type = mime_type;
 714         if (viewable_mime_type_list.indexOf(suggested_type) == -1)
 715             suggested_type = "text/plain";
 716         mime_type = yield I.minibuffer.read_viewable_mime_type(
 717             $prompt = "View internally as",
 718             $initial_value = suggested_type,
 719             $select);
 720         yield override_mime_type_for_next_load(load_spec_uri(spec), mime_type);
 721         browser_object_follow(I.buffer, target, spec);
 722     } finally {
 723         panel.destroy();
 724     }
 725 }
 726
 727 function view_as_mime_type_new_buffer (I) {
 728     yield view_as_mime_type(I, OPEN_NEW_BUFFER);
 729 }
 730
 731 function view_as_mime_type_new_window (I) {
 732     yield view_as_mime_type(I, OPEN_NEW_WINDOW);
 733 }
 734
 735 interactive("view-as-mime-type",
 736     "Display a browser object in the browser using the specified MIME type.",
 737     alternates(view_as_mime_type,
 738         view_as_mime_type_new_buffer,
 739         view_as_mime_type_new_window),
 740     $browser_object = browser_object_frames);
 741
 742
 743 interactive("delete",
 744     "Delete a DOM node, given as a browser object.",
 745     function (I) {
 746         var elem = yield read_browser_object(I);
 747         if (! (elem instanceof Ci.nsIDOMNode))
 748             throw interactive_error("Cannot delete item");
 749         elem.parentNode.removeChild(elem);
 750     },
 751     $browser_object = browser_object_dom_node);
 752
 753
 754 interactive("charset-prefix",
 755     "A prefix command that prompts for a charset to use in a "+
 756     "subsequent navigation command.",
 757     function (I) {
 758         var ccman = Cc["@mozilla.org/charset-converter-manager;1"]
 759             .getService(Ci.nsICharsetConverterManager);
 760         var decoders = ccman.getDecoderList()
 761         var charsets = [];
 762         while (decoders.hasMore())
 763             charsets.push(decoders.getNext());
 764         I.forced_charset = yield I.minibuffer.read(
 765             $prompt = "Charset:",
 766             $completer = prefix_completer(
 767                 $completions = charsets,
 768                 $get_string = function (x) x.toLowerCase()),
 769             $match_required,
 770             $space_completes);
 771     },
 772     $prefix);
 773
 774
 775 interactive("reload-with-charset",
 776     "Prompt for a charset, and reload the current page, forcing use "+
 777     "of that charset.",
 778     function (I) {
 779         var ccman = Cc["@mozilla.org/charset-converter-manager;1"]
 780             .getService(Ci.nsICharsetConverterManager);
 781         var decoders = ccman.getDecoderList()
 782         var charsets = [];
 783         while (decoders.hasMore())
 784             charsets.push(decoders.getNext());
 785         var forced_charset = yield I.minibuffer.read(
 786             $prompt = "Charset:",
 787             $completer = prefix_completer(
 788                 $completions = charsets,
 789                 $get_string = function (x) x.toLowerCase()),
 790             $match_required,
 791             $space_completes);
 792         reload(I.buffer, false, null, forced_charset);
 793     });
 794
 795
 796 interactive("yank",
 797     "Paste the contents of the clipboard",
 798     function (I) {
 799         call_builtin_command(I.window, "cmd_paste", true);
 800     });
 801
 802 interactive("kill-region",
 803     "Kill (\"cut\") the selected text.",
 804     function (I) {
 805         call_builtin_command(I.window, "cmd_cut", true);
 806     });
 807
 808 interactive("kill-ring-save",
 809     "Save the region as if killed, but don't kill it.",
 810     function (I) {
 811         call_builtin_command(I.window, "cmd_copy", true);
 812     });
 813
 814 interactive("password-manager",
 815     "Open the password manager.",
 816     "find-url-new-buffer",
 817     $browser_object = "chrome://passwordmgr/content/passwordManager.xul");
 818
 819
 820 interactive("toggle-full-screen",
 821     "Toggle full screen mode for the current window.",
 822     function (I) {
 823         window_set_full_screen(I.window);
 824         if (I.window.fullScreen)
 825             I.minibuffer.message("Fullscreen mode on");
 826         else
 827             I.minibuffer.message("Fullscreen mode off");
 828     });
 829
 830
 831 interactive("image-toggle-zoom-to-fit",
 832     "Toggle zoom-to-fit (viewport) on an image document.",
 833     function (I) {
 834         try {
 835             var doc = I.buffer.document
 836                 .QueryInterface(Ci.nsIImageDocument);
 837             doc.toggleImageSize();
 838             zoom_hook.run(I.buffer);
 839         } catch (e) {
 840             I.minibuffer.message("Not an image document");
 841         }
 842     });
 843
 844
 845 provide("commands");