toolkit/content/contentAreaUtils.js

   1 # -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2 # ***** BEGIN LICENSE BLOCK *****
   3 # Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4 #
   5 # The contents of this file are subject to the Mozilla Public License Version
   6 # 1.1 (the "License"); you may not use this file except in compliance with
   7 # the License. You may obtain a copy of the License at
   8 # http://www.mozilla.org/MPL/
   9 #
  10 # Software distributed under the License is distributed on an "AS IS" basis,
  11 # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12 # for the specific language governing rights and limitations under the
  13 # License.
  14 #
  15 # The Original Code is mozilla.org code.
  16 #
  17 # The Initial Developer of the Original Code is
  18 # Netscape Communications Corporation.
  19 # Portions created by the Initial Developer are Copyright (C) 1998
  20 # the Initial Developer. All Rights Reserved.
  21 #
  22 # Contributor(s):
  23 #   Ben Goodger <ben@netscape.com> (Save File)
  24 #   Fredrik Holmqvist <thesuckiestemail@yahoo.se>
  25 #   Asaf Romano <mozilla.mano@sent.com>
  26 #
  27 # Alternatively, the contents of this file may be used under the terms of
  28 # either the GNU General Public License Version 2 or later (the "GPL"), or
  29 # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  30 # in which case the provisions of the GPL or the LGPL are applicable instead
  31 # of those above. If you wish to allow use of your version of this file only
  32 # under the terms of either the GPL or the LGPL, and not to allow others to
  33 # use your version of this file under the terms of the MPL, indicate your
  34 # decision by deleting the provisions above and replace them with the notice
  35 # and other provisions required by the GPL or the LGPL. If you do not delete
  36 # the provisions above, a recipient may use your version of this file under
  37 # the terms of any one of the MPL, the GPL or the LGPL.
  38 #
  39 # ***** END LICENSE BLOCK *****
  40
  41 /**
  42  * urlSecurityCheck: JavaScript wrapper for checkLoadURIWithPrincipal
  43  * and checkLoadURIStrWithPrincipal.
  44  * If |aPrincipal| is not allowed to link to |aURL|, this function throws with
  45  * an error message.
  46  *
  47  * @param aURL
  48  *        The URL a page has linked to. This could be passed either as a string
  49  *        or as a nsIURI object.
  50  * @param aPrincipal
  51  *        The principal of the document from which aURL came.
  52  * @param aFlags
  53  *        Flags to be passed to checkLoadURIStr. If undefined,
  54  *        nsIScriptSecurityManager.STANDARD will be passed.
  55  */
  56 function urlSecurityCheck(aURL, aPrincipal, aFlags)
  57 {
  58   const nsIScriptSecurityManager =
  59     Components.interfaces.nsIScriptSecurityManager;
  60   var secMan = Components.classes["@mozilla.org/scriptsecuritymanager;1"]
  61                          .getService(nsIScriptSecurityManager);
  62   if (aFlags === undefined)
  63     aFlags = nsIScriptSecurityManager.STANDARD;
  64
  65   try {
  66     if (aURL instanceof Components.interfaces.nsIURI)
  67       secMan.checkLoadURIWithPrincipal(aPrincipal, aURL, aFlags);
  68     else
  69       secMan.checkLoadURIStrWithPrincipal(aPrincipal, aURL, aFlags);
  70   } catch (e) {
  71     // XXXmano: dump the principal url here too
  72     throw "Load of " + aURL + " denied.";
  73   }
  74 }
  75
  76 /**
  77  * Determine whether or not a given focused DOMWindow is in the content area.
  78  **/
  79 function isContentFrame(aFocusedWindow)
  80 {
  81   if (!aFocusedWindow)
  82     return false;
  83
  84   return (aFocusedWindow.top == window.content);
  85 }
  86
  87
  88 // Clientelle: (Make sure you don't break any of these)
  89 //  - File    ->  Save Page/Frame As...
  90 //  - Context ->  Save Page/Frame As...
  91 //  - Context ->  Save Link As...
  92 //  - Alt-Click links in web pages
  93 //  - Alt-Click links in the UI
  94 //
  95 // Try saving each of these types:
  96 // - A complete webpage using File->Save Page As, and Context->Save Page As
  97 // - A webpage as HTML only using the above methods
  98 // - A webpage as Text only using the above methods
  99 // - An image with an extension (e.g. .jpg) in its file name, using
 100 //   Context->Save Image As...
 101 // - An image without an extension (e.g. a banner ad on cnn.com) using
 102 //   the above method.
 103 // - A linked document using Save Link As...
 104 // - A linked document using Alt-click Save Link As...
 105 //
 106 function saveURL(aURL, aFileName, aFilePickerTitleKey, aShouldBypassCache,
 107                  aSkipPrompt, aReferrer)
 108 {
 109   internalSave(aURL, null, aFileName, null, null, aShouldBypassCache,
 110                aFilePickerTitleKey, null, aReferrer, aSkipPrompt);
 111 }
 112
 113 // Just like saveURL, but will get some info off the image before
 114 // calling internalSave
 115 // Clientelle: (Make sure you don't break any of these)
 116 //  - Context ->  Save Image As...
 117 const imgICache = Components.interfaces.imgICache;
 118 const nsISupportsCString = Components.interfaces.nsISupportsCString;
 119
 120 function saveImageURL(aURL, aFileName, aFilePickerTitleKey, aShouldBypassCache,
 121                       aSkipPrompt, aReferrer)
 122 {
 123   var contentType = null;
 124   var contentDisposition = null;
 125   if (!aShouldBypassCache) {
 126     try {
 127       var imageCache = Components.classes["@mozilla.org/image/cache;1"]
 128                                  .getService(imgICache);
 129       var props =
 130         imageCache.findEntryProperties(makeURI(aURL, getCharsetforSave(null)));
 131       if (props) {
 132         contentType = props.get("type", nsISupportsCString);
 133         contentDisposition = props.get("content-disposition",
 134                                        nsISupportsCString);
 135       }
 136     } catch (e) {
 137       // Failure to get type and content-disposition off the image is non-fatal
 138     }
 139   }
 140   internalSave(aURL, null, aFileName, contentDisposition, contentType,
 141                aShouldBypassCache, aFilePickerTitleKey, null, aReferrer, aSkipPrompt);
 142 }
 143
 144 function saveFrameDocument()
 145 {
 146   var focusedWindow = document.commandDispatcher.focusedWindow;
 147   if (isContentFrame(focusedWindow))
 148     saveDocument(focusedWindow.document);
 149 }
 150
 151 function saveDocument(aDocument, aSkipPrompt)
 152 {
 153   if (!aDocument)
 154     throw "Must have a document when calling saveDocument";
 155
 156   // We want to use cached data because the document is currently visible.
 157   var contentDisposition = null;
 158   try {
 159     contentDisposition =
 160       aDocument.defaultView
 161                .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
 162                .getInterface(Components.interfaces.nsIDOMWindowUtils)
 163                .getDocumentMetadata("content-disposition");
 164   } catch (ex) {
 165     // Failure to get a content-disposition is ok
 166   }
 167   internalSave(aDocument.location.href, aDocument, null, contentDisposition,
 168                aDocument.contentType, false, null, null,
 169                aDocument.referrer ? makeURI(aDocument.referrer) : null,
 170                aSkipPrompt);
 171 }
 172
 173 function DownloadListener(win, transfer) {
 174   function makeClosure(name) {
 175     return function() {
 176       transfer[name].apply(transfer, arguments);
 177     }
 178   }
 179
 180   this.window = win;
 181
 182   // Now... we need to forward all calls to our transfer
 183   for (var i in transfer) {
 184     if (i != "QueryInterface")
 185       this[i] = makeClosure(i);
 186   }
 187 }
 188
 189 DownloadListener.prototype = {
 190   QueryInterface: function dl_qi(aIID)
 191   {
 192     if (aIID.equals(Components.interfaces.nsIInterfaceRequestor) ||
 193         aIID.equals(Components.interfaces.nsIWebProgressListener) ||
 194         aIID.equals(Components.interfaces.nsIWebProgressListener2) ||
 195         aIID.equals(Components.interfaces.nsISupports)) {
 196       return this;
 197     }
 198     throw Components.results.NS_ERROR_NO_INTERFACE;
 199   },
 200
 201   getInterface: function dl_gi(aIID)
 202   {
 203     if (aIID.equals(Components.interfaces.nsIAuthPrompt) ||
 204         aIID.equals(Components.interfaces.nsIAuthPrompt2)) {
 205       var ww =
 206         Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
 207                   .getService(Components.interfaces.nsIPromptFactory);
 208       return ww.getPrompt(this.window, aIID);
 209     }
 210
 211     throw Components.results.NS_ERROR_NO_INTERFACE;
 212   }
 213 }
 214
 215 const kSaveAsType_Complete = 0; // Save document with attached objects.
 216 // const kSaveAsType_URL      = 1; // Save document or URL by itself.
 217 const kSaveAsType_Text     = 2; // Save document, converting to plain text.
 218
 219 /**
 220  * internalSave: Used when saving a document or URL. This method:
 221  *  - Determines a local target filename to use (unless parameter
 222  *    aChosenData is non-null)
 223  *  - Determines content-type if possible
 224  *  - Prompts the user to confirm the destination filename and save mode
 225  *    (content-type affects this)
 226  *  - Creates a 'Persist' object (which will perform the saving in the
 227  *    background) and then starts it.
 228  *
 229  * @param aURL The String representation of the URL of the document being saved
 230  * @param aDocument The document to be saved
 231  * @param aDefaultFileName The caller-provided suggested filename if we don't
 232  *        find a better one
 233  * @param aContentDisposition The caller-provided content-disposition header
 234  *         to use.
 235  * @param aContentType The caller-provided content-type to use
 236  * @param aShouldBypassCache If true, the document will always be refetched
 237  *        from the server
 238  * @param aFilePickerTitleKey Alternate title for the file picker
 239  * @param aChosenData If non-null this contains an instance of object AutoChosen
 240  *        (see below) which holds pre-determined data so that the user does not
 241  *        need to be prompted for a target filename.
 242  * @param aReferrer the referrer URI object (not URL string) to use, or null
 243           if no referrer should be sent.
 244  * @param aSkipPrompt If true, the file will be saved to the default download folder.
 245  */
 246 function internalSave(aURL, aDocument, aDefaultFileName, aContentDisposition,
 247                       aContentType, aShouldBypassCache, aFilePickerTitleKey,
 248                       aChosenData, aReferrer, aSkipPrompt)
 249 {
 250   if (aSkipPrompt == undefined)
 251     aSkipPrompt = false;
 252
 253   // Note: aDocument == null when this code is used by save-link-as...
 254   var saveMode = GetSaveModeForContentType(aContentType);
 255   var isDocument = aDocument != null && saveMode != SAVEMODE_FILEONLY;
 256   var saveAsType = kSaveAsType_Complete;
 257
 258   var file, fileURL;
 259   // Find the URI object for aURL and the FileName/Extension to use when saving.
 260   // FileName/Extension will be ignored if aChosenData supplied.
 261   var fileInfo = new FileInfo(aDefaultFileName);
 262   if (aChosenData)
 263     file = aChosenData.file;
 264   else {
 265     var charset = null;
 266     if (aDocument)
 267       charset = aDocument.characterSet;
 268     else if (aReferrer)
 269       charset = aReferrer.originCharset;
 270     initFileInfo(fileInfo, aURL, charset, aDocument,
 271                  aContentType, aContentDisposition);
 272     var fpParams = {
 273       fpTitleKey: aFilePickerTitleKey,
 274       isDocument: isDocument,
 275       fileInfo: fileInfo,
 276       contentType: aContentType,
 277       saveMode: saveMode,
 278       saveAsType: saveAsType,
 279       file: file,
 280       fileURL: fileURL
 281     };
 282
 283     if (!getTargetFile(fpParams, aSkipPrompt))
 284       // If the method returned false this is because the user cancelled from
 285       // the save file picker dialog.
 286       return;
 287
 288     saveAsType = fpParams.saveAsType;
 289     saveMode = fpParams.saveMode;
 290     file = fpParams.file;
 291     fileURL = fpParams.fileURL;
 292   }
 293
 294   if (!fileURL)
 295     fileURL = makeFileURI(file);
 296
 297   // XXX We depend on the following holding true in appendFiltersForContentType():
 298   // If we should save as a complete page, the saveAsType is kSaveAsType_Complete.
 299   // If we should save as text, the saveAsType is kSaveAsType_Text.
 300   var useSaveDocument = isDocument &&
 301                         (((saveMode & SAVEMODE_COMPLETE_DOM) && (saveAsType == kSaveAsType_Complete)) ||
 302                          ((saveMode & SAVEMODE_COMPLETE_TEXT) && (saveAsType == kSaveAsType_Text)));
 303   // If we're saving a document, and are saving either in complete mode or
 304   // as converted text, pass the document to the web browser persist component.
 305   // If we're just saving the HTML (second option in the list), send only the URI.
 306   var source = useSaveDocument ? aDocument : fileInfo.uri;
 307   var persistArgs = {
 308     source      : source,
 309     contentType : (!aChosenData && useSaveDocument &&
 310                    saveAsType == kSaveAsType_Text) ?
 311                   "text/plain" : null,
 312     target      : fileURL,
 313     postData    : isDocument ? getPostData() : null,
 314     bypassCache : aShouldBypassCache
 315   };
 316
 317   var persist = makeWebBrowserPersist();
 318
 319   // Calculate persist flags.
 320   const nsIWBP = Components.interfaces.nsIWebBrowserPersist;
 321   const flags = nsIWBP.PERSIST_FLAGS_REPLACE_EXISTING_FILES;
 322   if (aShouldBypassCache)
 323     persist.persistFlags = flags | nsIWBP.PERSIST_FLAGS_BYPASS_CACHE;
 324   else
 325     persist.persistFlags = flags | nsIWBP.PERSIST_FLAGS_FROM_CACHE;
 326
 327   // Leave it to WebBrowserPersist to discover the encoding type (or lack thereof):
 328   persist.persistFlags |= nsIWBP.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION;
 329
 330   // Create download and initiate it (below)
 331   var tr = Components.classes["@mozilla.org/transfer;1"].createInstance(Components.interfaces.nsITransfer);
 332
 333   if (useSaveDocument) {
 334     // Saving a Document, not a URI:
 335     var filesFolder = null;
 336     if (persistArgs.contentType != "text/plain") {
 337       // Create the local directory into which to save associated files.
 338       filesFolder = file.clone();
 339
 340       var nameWithoutExtension = getFileBaseName(filesFolder.leafName);
 341       var filesFolderLeafName = getStringBundle().formatStringFromName("filesFolder",
 342                                                                        [nameWithoutExtension],
 343                                                                        1);
 344
 345       filesFolder.leafName = filesFolderLeafName;
 346     }
 347
 348     var encodingFlags = 0;
 349     if (persistArgs.contentType == "text/plain") {
 350       encodingFlags |= nsIWBP.ENCODE_FLAGS_FORMATTED;
 351       encodingFlags |= nsIWBP.ENCODE_FLAGS_ABSOLUTE_LINKS;
 352       encodingFlags |= nsIWBP.ENCODE_FLAGS_NOFRAMES_CONTENT;
 353     }
 354     else {
 355       encodingFlags |= nsIWBP.ENCODE_FLAGS_ENCODE_BASIC_ENTITIES;
 356     }
 357
 358     const kWrapColumn = 80;
 359     tr.init((aChosenData ? aChosenData.uri : fileInfo.uri),
 360             persistArgs.target, "", null, null, null, persist);
 361     persist.progressListener = new DownloadListener(window, tr);
 362     persist.saveDocument(persistArgs.source, persistArgs.target, filesFolder,
 363                          persistArgs.contentType, encodingFlags, kWrapColumn);
 364   } else {
 365     tr.init((aChosenData ? aChosenData.uri : source),
 366             persistArgs.target, "", null, null, null, persist);
 367     persist.progressListener = new DownloadListener(window, tr);
 368     persist.saveURI((aChosenData ? aChosenData.uri : source),
 369                     null, aReferrer, persistArgs.postData, null,
 370                     persistArgs.target);
 371   }
 372 }
 373
 374 /**
 375  * Structure for holding info about automatically supplied parameters for
 376  * internalSave(...). This allows parameters to be supplied so the user does not
 377  * need to be prompted for file info.
 378  * @param aFileAutoChosen This is an nsILocalFile object that has been
 379  *        pre-determined as the filename for the target to save to
 380  * @param aUriAutoChosen  This is the nsIURI object for the target
 381  */
 382 function AutoChosen(aFileAutoChosen, aUriAutoChosen) {
 383   this.file = aFileAutoChosen;
 384   this.uri  = aUriAutoChosen;
 385 }
 386
 387 /**
 388  * Structure for holding info about a URL and the target filename it should be
 389  * saved to. This structure is populated by initFileInfo(...).
 390  * @param aSuggestedFileName This is used by initFileInfo(...) when it
 391  *        cannot 'discover' the filename from the url
 392  * @param aFileName The target filename
 393  * @param aFileBaseName The filename without the file extension
 394  * @param aFileExt The extension of the filename
 395  * @param aUri An nsIURI object for the url that is being saved
 396  */
 397 function FileInfo(aSuggestedFileName, aFileName, aFileBaseName, aFileExt, aUri) {
 398   this.suggestedFileName = aSuggestedFileName;
 399   this.fileName = aFileName;
 400   this.fileBaseName = aFileBaseName;
 401   this.fileExt = aFileExt;
 402   this.uri = aUri;
 403 }
 404
 405 /**
 406  * Determine what the 'default' filename string is, its file extension and the
 407  * filename without the extension. This filename is used when prompting the user
 408  * for confirmation in the file picker dialog.
 409  * @param aFI A FileInfo structure into which we'll put the results of this method.
 410  * @param aURL The String representation of the URL of the document being saved
 411  * @param aURLCharset The charset of aURL.
 412  * @param aDocument The document to be saved
 413  * @param aContentType The content type we're saving, if it could be
 414  *        determined by the caller.
 415  * @param aContentDisposition The content-disposition header for the object
 416  *        we're saving, if it could be determined by the caller.
 417  */
 418 function initFileInfo(aFI, aURL, aURLCharset, aDocument,
 419                       aContentType, aContentDisposition)
 420 {
 421   try {
 422     // Get an nsIURI object from aURL if possible:
 423     try {
 424       aFI.uri = makeURI(aURL, aURLCharset);
 425       // Assuming nsiUri is valid, calling QueryInterface(...) on it will
 426       // populate extra object fields (eg filename and file extension).
 427       var url = aFI.uri.QueryInterface(Components.interfaces.nsIURL);
 428       aFI.fileExt = url.fileExtension;
 429     } catch (e) {
 430     }
 431
 432     // Get the default filename:
 433     aFI.fileName = getDefaultFileName((aFI.suggestedFileName || aFI.fileName),
 434                                       aFI.uri, aDocument, aContentDisposition);
 435     // If aFI.fileExt is still blank, consider: aFI.suggestedFileName is supplied
 436     // if saveURL(...) was the original caller (hence both aContentType and
 437     // aDocument are blank). If they were saving a link to a website then make
 438     // the extension .htm .
 439     if (!aFI.fileExt && !aDocument && !aContentType && (/^http(s?):\/\//i.test(aURL))) {
 440       aFI.fileExt = "htm";
 441       aFI.fileBaseName = aFI.fileName;
 442     } else {
 443       aFI.fileExt = getDefaultExtension(aFI.fileName, aFI.uri, aContentType);
 444       aFI.fileBaseName = getFileBaseName(aFI.fileName);
 445     }
 446   } catch (e) {
 447   }
 448 }
 449
 450 function getTargetFile(aFpP, aSkipPrompt)
 451 {
 452   const prefSvcContractID = "@mozilla.org/preferences-service;1";
 453   const prefSvcIID = Components.interfaces.nsIPrefService;
 454   var prefs = Components.classes[prefSvcContractID]
 455                         .getService(prefSvcIID).getBranch("browser.download.");
 456
 457   const nsILocalFile = Components.interfaces.nsILocalFile;
 458
 459   // For information on download folder preferences, see
 460   // mozilla/browser/components/preferences/main.js
 461
 462   var useDownloadDir = prefs.getBoolPref("useDownloadDir");
 463   var dir = null;
 464
 465   // Default to lastDir if useDownloadDir is false, and lastDir
 466   // is configured and valid. Otherwise, use the user's default
 467   // downloads directory configured through download prefs.
 468   var dnldMgr = Components.classes["@mozilla.org/download-manager;1"]
 469                           .getService(Components.interfaces.nsIDownloadManager);
 470   try {
 471     var lastDir = prefs.getComplexValue("lastDir", nsILocalFile);
 472     if ((!aSkipPrompt || !useDownloadDir) && lastDir.exists())
 473       dir = lastDir;
 474     else
 475       dir = dnldMgr.userDownloadsDirectory;
 476   } catch(ex) {
 477     dir = dnldMgr.userDownloadsDirectory;
 478   }
 479
 480   if (!aSkipPrompt || !useDownloadDir || !dir || (dir && !dir.exists())) {
 481     if (!dir || (dir && !dir.exists())) {
 482       // Default to desktop.
 483       var fileLocator = Components.classes["@mozilla.org/file/directory_service;1"]
 484                                   .getService(Components.interfaces.nsIProperties);
 485       dir = fileLocator.get("Desk", nsILocalFile);
 486     }
 487
 488     var fp = makeFilePicker();
 489     var titleKey = aFpP.fpTitleKey || "SaveLinkTitle";
 490     var bundle = getStringBundle();
 491     fp.init(window, bundle.GetStringFromName(titleKey),
 492             Components.interfaces.nsIFilePicker.modeSave);
 493
 494     fp.defaultExtension = aFpP.fileInfo.fileExt;
 495     fp.defaultString = getNormalizedLeafName(aFpP.fileInfo.fileName,
 496                                              aFpP.fileInfo.fileExt);
 497     appendFiltersForContentType(fp, aFpP.contentType, aFpP.fileInfo.fileExt,
 498                                 aFpP.saveMode);
 499
 500     if (dir)
 501       fp.displayDirectory = dir;
 502
 503     if (aFpP.isDocument) {
 504       try {
 505         fp.filterIndex = prefs.getIntPref("save_converter_index");
 506       }
 507       catch (e) {
 508       }
 509     }
 510
 511     if (fp.show() == Components.interfaces.nsIFilePicker.returnCancel || !fp.file)
 512       return false;
 513
 514     var directory = fp.file.parent.QueryInterface(nsILocalFile);
 515     prefs.setComplexValue("lastDir", nsILocalFile, directory);
 516
 517     fp.file.leafName = validateFileName(fp.file.leafName);
 518     aFpP.saveAsType = fp.filterIndex;
 519     aFpP.file = fp.file;
 520     aFpP.fileURL = fp.fileURL;
 521
 522     if (aFpP.isDocument)
 523       prefs.setIntPref("save_converter_index", aFpP.saveAsType);
 524   }
 525   else {
 526     dir.append(getNormalizedLeafName(aFpP.fileInfo.fileName,
 527                                      aFpP.fileInfo.fileExt));
 528     var file = dir;
 529
 530     // Since we're automatically downloading, we don't get the file picker's
 531     // logic to check for existing files, so we need to do that here.
 532     //
 533     // Note - this code is identical to that in
 534     //   mozilla/toolkit/mozapps/downloads/src/nsHelperAppDlg.js.in
 535     // If you are updating this code, update that code too! We can't share code
 536     // here since that code is called in a js component.
 537     var collisionCount = 0;
 538     while (file.exists()) {
 539       collisionCount++;
 540       if (collisionCount == 1) {
 541         // Append "(2)" before the last dot in (or at the end of) the filename
 542         // special case .ext.gz etc files so we don't wind up with .tar(2).gz
 543         if (file.leafName.match(/\.[^\.]{1,3}\.(gz|bz2|Z)$/i))
 544           file.leafName = file.leafName.replace(/\.[^\.]{1,3}\.(gz|bz2|Z)$/i, "(2)$&");
 545         else
 546           file.leafName = file.leafName.replace(/(\.[^\.]*)?$/, "(2)$&");
 547       }
 548       else {
 549         // replace the last (n) in the filename with (n+1)
 550         file.leafName = file.leafName.replace(/^(.*\()\d+\)/, "$1" + (collisionCount+1) + ")");
 551       }
 552     }
 553     aFpP.file = file;
 554   }
 555
 556   return true;
 557 }
 558
 559 // We have no DOM, and can only save the URL as is.
 560 const SAVEMODE_FILEONLY      = 0x00;
 561 // We have a DOM and can save as complete.
 562 const SAVEMODE_COMPLETE_DOM  = 0x01;
 563 // We have a DOM which we can serialize as text.
 564 const SAVEMODE_COMPLETE_TEXT = 0x02;
 565
 566 // If we are able to save a complete DOM, the 'save as complete' filter
 567 // must be the first filter appended.  The 'save page only' counterpart
 568 // must be the second filter appended.  And the 'save as complete text'
 569 // filter must be the third filter appended.
 570 function appendFiltersForContentType(aFilePicker, aContentType, aFileExtension, aSaveMode)
 571 {
 572   var bundle = getStringBundle();
 573   // The bundle name for saving only a specific content type.
 574   var bundleName;
 575   // The corresponding filter string for a specific content type.
 576   var filterString;
 577
 578   // XXX all the cases that are handled explicitly here MUST be handled
 579   // in GetSaveModeForContentType to return a non-fileonly filter.
 580   switch (aContentType) {
 581   case "text/html":
 582     bundleName   = "WebPageHTMLOnlyFilter";
 583     filterString = "*.htm; *.html";
 584     break;
 585
 586   case "application/xhtml+xml":
 587     bundleName   = "WebPageXHTMLOnlyFilter";
 588     filterString = "*.xht; *.xhtml";
 589     break;
 590
 591   case "image/svg+xml":
 592     bundleName   = "WebPageSVGOnlyFilter";
 593     filterString = "*.svg; *.svgz";
 594     break;
 595
 596   case "text/xml":
 597   case "application/xml":
 598     bundleName   = "WebPageXMLOnlyFilter";
 599     filterString = "*.xml";
 600     break;
 601
 602   default:
 603     if (aSaveMode != SAVEMODE_FILEONLY)
 604       throw "Invalid save mode for type '" + aContentType + "'";
 605
 606     var mimeInfo = getMIMEInfoForType(aContentType, aFileExtension);
 607     if (mimeInfo) {
 608
 609       var extEnumerator = mimeInfo.getFileExtensions();
 610
 611       var extString = "";
 612       while (extEnumerator.hasMore()) {
 613         var extension = extEnumerator.getNext();
 614         if (extString)
 615           extString += "; ";    // If adding more than one extension,
 616                                 // separate by semi-colon
 617         extString += "*." + extension;
 618       }
 619
 620       if (extString)
 621         aFilePicker.appendFilter(mimeInfo.description, extString);
 622     }
 623
 624     break;
 625   }
 626
 627   if (aSaveMode & SAVEMODE_COMPLETE_DOM) {
 628     aFilePicker.appendFilter(bundle.GetStringFromName("WebPageCompleteFilter"), filterString);
 629     // We should always offer a choice to save document only if
 630     // we allow saving as complete.
 631     aFilePicker.appendFilter(bundle.GetStringFromName(bundleName), filterString);
 632   }
 633
 634   if (aSaveMode & SAVEMODE_COMPLETE_TEXT)
 635     aFilePicker.appendFilters(Components.interfaces.nsIFilePicker.filterText);
 636
 637   // Always append the all files (*) filter
 638   aFilePicker.appendFilters(Components.interfaces.nsIFilePicker.filterAll);
 639 }
 640
 641 function getPostData()
 642 {
 643   try {
 644     var sessionHistory = getWebNavigation().sessionHistory;
 645     return sessionHistory.getEntryAtIndex(sessionHistory.index, false)
 646                          .QueryInterface(Components.interfaces.nsISHEntry)
 647                          .postData;
 648   }
 649   catch (e) {
 650   }
 651   return null;
 652 }
 653
 654 function getStringBundle()
 655 {
 656   return Components.classes["@mozilla.org/intl/stringbundle;1"]
 657                    .getService(Components.interfaces.nsIStringBundleService)
 658                    .createBundle("chrome://global/locale/contentAreaCommands.properties");
 659 }
 660
 661 function makeWebBrowserPersist()
 662 {
 663   const persistContractID = "@mozilla.org/embedding/browser/nsWebBrowserPersist;1";
 664   const persistIID = Components.interfaces.nsIWebBrowserPersist;
 665   return Components.classes[persistContractID].createInstance(persistIID);
 666 }
 667
 668 /**
 669  * Constructs a new URI, using nsIIOService.
 670  * @param aURL The URI spec.
 671  * @param aOriginCharset The charset of the URI.
 672  * @param aBaseURI Base URI to resolve aURL, or null.
 673  * @return an nsIURI object based on aURL.
 674  */
 675 function makeURI(aURL, aOriginCharset, aBaseURI)
 676 {
 677   var ioService = Components.classes["@mozilla.org/network/io-service;1"]
 678                             .getService(Components.interfaces.nsIIOService);
 679   return ioService.newURI(aURL, aOriginCharset, aBaseURI);
 680 }
 681
 682 function makeFileURI(aFile)
 683 {
 684   var ioService = Components.classes["@mozilla.org/network/io-service;1"]
 685                             .getService(Components.interfaces.nsIIOService);
 686   return ioService.newFileURI(aFile);
 687 }
 688
 689 function makeFilePicker()
 690 {
 691   const fpContractID = "@mozilla.org/filepicker;1";
 692   const fpIID = Components.interfaces.nsIFilePicker;
 693   return Components.classes[fpContractID].createInstance(fpIID);
 694 }
 695
 696 function getMIMEService()
 697 {
 698   const mimeSvcContractID = "@mozilla.org/mime;1";
 699   const mimeSvcIID = Components.interfaces.nsIMIMEService;
 700   const mimeSvc = Components.classes[mimeSvcContractID].getService(mimeSvcIID);
 701   return mimeSvc;
 702 }
 703
 704 // Given aFileName, find the fileName without the extension on the end.
 705 function getFileBaseName(aFileName)
 706 {
 707   // Remove the file extension from aFileName:
 708   return aFileName.replace(/\.[^.]*$/, "");
 709 }
 710
 711 function getMIMETypeForURI(aURI)
 712 {
 713   try {
 714     return getMIMEService().getTypeFromURI(aURI);
 715   }
 716   catch (e) {
 717   }
 718   return null;
 719 }
 720
 721 function getMIMEInfoForType(aMIMEType, aExtension)
 722 {
 723   if (aMIMEType || aExtension) {
 724     try {
 725       return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension);
 726     }
 727     catch (e) {
 728     }
 729   }
 730   return null;
 731 }
 732
 733 function getDefaultFileName(aDefaultFileName, aURI, aDocument,
 734                             aContentDisposition)
 735 {
 736   // 1) look for a filename in the content-disposition header, if any
 737   if (aContentDisposition) {
 738     const mhpContractID = "@mozilla.org/network/mime-hdrparam;1";
 739     const mhpIID = Components.interfaces.nsIMIMEHeaderParam;
 740     const mhp = Components.classes[mhpContractID].getService(mhpIID);
 741     var dummy = { value: null };  // Need an out param...
 742     var charset = getCharsetforSave(aDocument);
 743
 744     var fileName = null;
 745     try {
 746       fileName = mhp.getParameter(aContentDisposition, "filename", charset,
 747                                   true, dummy);
 748     }
 749     catch (e) {
 750       try {
 751         fileName = mhp.getParameter(aContentDisposition, "name", charset, true,
 752                                     dummy);
 753       }
 754       catch (e) {
 755       }
 756     }
 757     if (fileName)
 758       return fileName;
 759   }
 760
 761   try {
 762     var url = aURI.QueryInterface(Components.interfaces.nsIURL);
 763     if (url.fileName != "") {
 764       // 2) Use the actual file name, if present
 765       var textToSubURI = Components.classes["@mozilla.org/intl/texttosuburi;1"]
 766                                    .getService(Components.interfaces.nsITextToSubURI);
 767       return validateFileName(textToSubURI.unEscapeURIForUI(url.originCharset || "UTF-8", url.fileName));
 768     }
 769   } catch (e) {
 770     // This is something like a data: and so forth URI... no filename here.
 771   }
 772
 773   if (aDocument) {
 774     var docTitle = validateFileName(aDocument.title).replace(/^\s+|\s+$/g, "");
 775     if (docTitle) {
 776       // 3) Use the document title
 777       return docTitle;
 778     }
 779   }
 780
 781   if (aDefaultFileName)
 782     // 4) Use the caller-provided name, if any
 783     return validateFileName(aDefaultFileName);
 784
 785   // 5) If this is a directory, use the last directory name
 786   var path = aURI.path.match(/\/([^\/]+)\/$/);
 787   if (path && path.length > 1)
 788     return validateFileName(path[1]);
 789
 790   try {
 791     if (aURI.host)
 792       // 6) Use the host.
 793       return aURI.host;
 794   } catch (e) {
 795     // Some files have no information at all, like Javascript generated pages
 796   }
 797   try {
 798     // 7) Use the default file name
 799     return getStringBundle().GetStringFromName("DefaultSaveFileName");
 800   } catch (e) {
 801     //in case localized string cannot be found
 802   }
 803   // 8) If all else fails, use "index"
 804   return "index";
 805 }
 806
 807 function validateFileName(aFileName)
 808 {
 809   var re = /[\/]+/g;
 810   if (navigator.appVersion.indexOf("Windows") != -1) {
 811     re = /[\\\/\|]+/g;
 812     aFileName = aFileName.replace(/[\"]+/g, "'");
 813     aFileName = aFileName.replace(/[\*\:\?]+/g, " ");
 814     aFileName = aFileName.replace(/[\<]+/g, "(");
 815     aFileName = aFileName.replace(/[\>]+/g, ")");
 816   }
 817   else if (navigator.appVersion.indexOf("Macintosh") != -1)
 818     re = /[\:\/]+/g;
 819
 820   return aFileName.replace(re, "_");
 821 }
 822
 823 function getNormalizedLeafName(aFile, aDefaultExtension)
 824 {
 825   if (!aDefaultExtension)
 826     return aFile;
 827
 828 #ifdef XP_WIN
 829   // Remove trailing dots and spaces on windows
 830   aFile = aFile.replace(/[\s.]+$/, "");
 831 #endif
 832
 833   // Remove leading dots
 834   aFile = aFile.replace(/^\.+/, "");
 835
 836   // Fix up the file name we're saving to to include the default extension
 837   var i = aFile.lastIndexOf(".");
 838   if (aFile.substr(i + 1) != aDefaultExtension)
 839     return aFile + "." + aDefaultExtension;
 840
 841   return aFile;
 842 }
 843
 844 function getDefaultExtension(aFilename, aURI, aContentType)
 845 {
 846   if (aContentType == "text/plain" || aContentType == "application/octet-stream" || aURI.scheme == "ftp")
 847     return "";   // temporary fix for bug 120327
 848
 849   // First try the extension from the filename
 850   const stdURLContractID = "@mozilla.org/network/standard-url;1";
 851   const stdURLIID = Components.interfaces.nsIURL;
 852   var url = Components.classes[stdURLContractID].createInstance(stdURLIID);
 853   url.filePath = aFilename;
 854
 855   var ext = url.fileExtension;
 856
 857   // This mirrors some code in nsExternalHelperAppService::DoContent
 858   // Use the filename first and then the URI if that fails
 859
 860   var mimeInfo = getMIMEInfoForType(aContentType, ext);
 861
 862   if (ext && mimeInfo && mimeInfo.extensionExists(ext))
 863     return ext;
 864
 865   // Well, that failed.  Now try the extension from the URI
 866   var urlext;
 867   try {
 868     url = aURI.QueryInterface(Components.interfaces.nsIURL);
 869     urlext = url.fileExtension;
 870   } catch (e) {
 871   }
 872
 873   if (urlext && mimeInfo && mimeInfo.extensionExists(urlext)) {
 874     return urlext;
 875   }
 876   else {
 877     try {
 878       if (mimeInfo)
 879         return mimeInfo.primaryExtension;
 880     }
 881     catch (e) {
 882     }
 883     // Fall back on the extensions in the filename and URI for lack
 884     // of anything better.
 885     return ext || urlext;
 886   }
 887 }
 888
 889 function GetSaveModeForContentType(aContentType)
 890 {
 891   var saveMode = SAVEMODE_FILEONLY;
 892   switch (aContentType) {
 893   case "text/html":
 894   case "application/xhtml+xml":
 895   case "image/svg+xml":
 896     saveMode |= SAVEMODE_COMPLETE_TEXT;
 897     // Fall through
 898   case "text/xml":
 899   case "application/xml":
 900     saveMode |= SAVEMODE_COMPLETE_DOM;
 901     break;
 902   }
 903
 904   return saveMode;
 905 }
 906
 907 function getCharsetforSave(aDocument)
 908 {
 909   if (aDocument)
 910     return aDocument.characterSet;
 911
 912   if (document.commandDispatcher.focusedWindow)
 913     return document.commandDispatcher.focusedWindow.document.characterSet;
 914
 915   return window.content.document.characterSet;
 916 }
 917
 918 /**
 919  * Open a URL from chrome, determining if we can handle it internally or need to
 920  *  launch an external application to handle it.
 921  * @param aURL The URL to be opened
 922  */
 923 function openURL(aURL)
 924 {
 925   var ios = Components.classes["@mozilla.org/network/io-service;1"]
 926                       .getService(Components.interfaces.nsIIOService);
 927   var uri = ios.newURI(aURL, null, null);
 928
 929   var protocolSvc = Components.classes["@mozilla.org/uriloader/external-protocol-service;1"]
 930                               .getService(Components.interfaces.nsIExternalProtocolService);
 931
 932   if (!protocolSvc.isExposedProtocol(uri.scheme)) {
 933     // If we're not a browser, use the external protocol service to load the URI.
 934     protocolSvc.loadUrl(uri);
 935   }
 936   else {
 937     var loadgroup = Components.classes["@mozilla.org/network/load-group;1"]
 938                               .createInstance(Components.interfaces.nsILoadGroup);
 939     var appstartup = Components.classes["@mozilla.org/toolkit/app-startup;1"]
 940                                .getService(Components.interfaces.nsIAppStartup);
 941
 942     var loadListener = {
 943       onStartRequest: function ll_start(aRequest, aContext) {
 944         appstartup.enterLastWindowClosingSurvivalArea();
 945       },
 946       onStopRequest: function ll_stop(aRequest, aContext, aStatusCode) {
 947         appstartup.exitLastWindowClosingSurvivalArea();
 948       },
 949       QueryInterface: function ll_QI(iid) {
 950         if (iid.equals(Components.interfaces.nsISupports) ||
 951             iid.equals(Components.interfaces.nsIRequestObserver) ||
 952             iid.equals(Components.interfaces.nsISupportsWeakReference))
 953           return this;
 954         throw Components.results.NS_ERROR_NO_INTERFACE;
 955       }
 956     }
 957     loadgroup.groupObserver = loadListener;
 958
 959     var uriListener = {
 960       onStartURIOpen: function(uri) { return false; },
 961       doContent: function(ctype, preferred, request, handler) { return false; },
 962       isPreferred: function(ctype, desired) { return false; },
 963       canHandleContent: function(ctype, preferred, desired) { return false; },
 964       loadCookie: null,
 965       parentContentListener: null,
 966       getInterface: function(iid) {
 967         if (iid.equals(Components.interfaces.nsIURIContentListener))
 968           return this;
 969         if (iid.equals(Components.interfaces.nsILoadGroup))
 970           return loadgroup;
 971         throw Components.results.NS_ERROR_NO_INTERFACE;
 972       }
 973     }
 974
 975     var channel = ios.newChannelFromURI(uri);
 976     var uriLoader = Components.classes["@mozilla.org/uriloader;1"]
 977                               .getService(Components.interfaces.nsIURILoader);
 978     uriLoader.openURI(channel, true, uriListener);
 979   }
 980 }