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Viewing file:     nsBrowserContentHandler.js (30.97 KB)      -rw-r--r--

//@line 37 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"

const nsISupports            = Components.interfaces.nsISupports;

const nsIBrowserDOMWindow    = Components.interfaces.nsIBrowserDOMWindow;
const nsIBrowserHandler      = Components.interfaces.nsIBrowserHandler;
const nsIBrowserHistory      = Components.interfaces.nsIBrowserHistory;
const nsIChannel             = Components.interfaces.nsIChannel;
const nsICommandLine         = Components.interfaces.nsICommandLine;
const nsICommandLineHandler  = Components.interfaces.nsICommandLineHandler;
const nsIContentHandler      = Components.interfaces.nsIContentHandler;
const nsIDocShellTreeItem    = Components.interfaces.nsIDocShellTreeItem;
const nsIDOMChromeWindow     = Components.interfaces.nsIDOMChromeWindow;
const nsIDOMWindow           = Components.interfaces.nsIDOMWindow;
const nsIFactory             = Components.interfaces.nsIFactory;
const nsIFileURL             = Components.interfaces.nsIFileURL;
const nsIHttpProtocolHandler = Components.interfaces.nsIHttpProtocolHandler;
const nsIInterfaceRequestor  = Components.interfaces.nsIInterfaceRequestor;
const nsINetUtil             = Components.interfaces.nsINetUtil;
const nsIPrefBranch          = Components.interfaces.nsIPrefBranch;
const nsIPrefLocalizedString = Components.interfaces.nsIPrefLocalizedString;
const nsISupportsString      = Components.interfaces.nsISupportsString;
const nsIURIFixup            = Components.interfaces.nsIURIFixup;
const nsIWebNavigation       = Components.interfaces.nsIWebNavigation;
const nsIWindowMediator      = Components.interfaces.nsIWindowMediator;
const nsIWindowWatcher       = Components.interfaces.nsIWindowWatcher;
const nsICategoryManager     = Components.interfaces.nsICategoryManager;
const nsIWebNavigationInfo   = Components.interfaces.nsIWebNavigationInfo;
const nsIBrowserSearchService = Components.interfaces.nsIBrowserSearchService;
const nsICommandLineValidator = Components.interfaces.nsICommandLineValidator;

const NS_BINDING_ABORTED = 0x804b0002;
const NS_ERROR_WONT_HANDLE_CONTENT = 0x805d0001;
const NS_ERROR_ABORT = Components.results.NS_ERROR_ABORT;

const URI_INHERITS_SECURITY_CONTEXT = nsIHttpProtocolHandler
                                        .URI_INHERITS_SECURITY_CONTEXT;

function shouldLoadURI(aURI) {
  if (aURI && !aURI.schemeIs("chrome"))
    return true;

  dump("*** Preventing external load of chrome: URI into browser window\n");
  dump("    Use -chrome <uri> instead\n");
  return false;
}

function resolveURIInternal(aCmdLine, aArgument) {
  var uri = aCmdLine.resolveURI(aArgument);

  if (!(uri instanceof nsIFileURL)) {
    return uri;
  }

  try {
    if (uri.file.exists())
      return uri;
  }
  catch (e) {
    Components.utils.reportError(e);
  }

  // We have interpreted the argument as a relative file URI, but the file
  // doesn't exist. Try URI fixup heuristics: see bug 290782.
 
  try {
    var urifixup = Components.classes["@mozilla.org/docshell/urifixup;1"]
                             .getService(nsIURIFixup);

    uri = urifixup.createFixupURI(aArgument, 0);
  }
  catch (e) {
    Components.utils.reportError(e);
  }

  return uri;
}

const OVERRIDE_NONE        = 0;
const OVERRIDE_NEW_PROFILE = 1;
const OVERRIDE_NEW_MSTONE  = 2;
/**
 * Determines whether a home page override is needed.
 * Returns:
 *  OVERRIDE_NEW_PROFILE if this is the first run with a new profile.
 *  OVERRIDE_NEW_MSTONE if this is the first run with a build with a different
 *                      Gecko milestone (i.e. right after an upgrade).
 *  OVERRIDE_NONE otherwise.
 */
function needHomepageOverride(prefb) {
  var savedmstone = null;
  try {
    savedmstone = prefb.getCharPref("browser.startup.homepage_override.mstone");
  } catch (e) {}

  if (savedmstone == "ignore")
    return OVERRIDE_NONE;

  var mstone = Components.classes["@mozilla.org/network/protocol;1?name=http"]
                         .getService(nsIHttpProtocolHandler).misc;

  if (mstone != savedmstone) {
    // Bug 462254. Previous releases had a default pref to suppress the EULA
    // agreement if the platform's installer had already shown one. Now with
    // about:rights we've removed the EULA stuff and default pref, but we need
    // a way to make existing profiles retain the default that we removed.
    if (savedmstone)
      prefb.setBoolPref("browser.rights.3.shown", true);
    
    prefb.setCharPref("browser.startup.homepage_override.mstone", mstone);
    return (savedmstone ? OVERRIDE_NEW_MSTONE : OVERRIDE_NEW_PROFILE);
  }

  return OVERRIDE_NONE;
}

// Copies a pref override file into the user's profile pref-override folder,
// and then tells the pref service to reload it's default prefs.
function copyPrefOverride() {
  try {
    var fileLocator = Components.classes["@mozilla.org/file/directory_service;1"]
                                .getService(Components.interfaces.nsIProperties);
    const NS_APP_EXISTING_PREF_OVERRIDE = "ExistingPrefOverride";
    var prefOverride = fileLocator.get(NS_APP_EXISTING_PREF_OVERRIDE,
                                       Components.interfaces.nsIFile);
    if (!prefOverride.exists())
      return; // nothing to do

    const NS_APP_PREFS_OVERRIDE_DIR     = "PrefDOverride";
    var prefOverridesDir = fileLocator.get(NS_APP_PREFS_OVERRIDE_DIR,
                                           Components.interfaces.nsIFile);

    // Check for any existing pref overrides, and remove them if present
    var existingPrefOverridesFile = prefOverridesDir.clone();
    existingPrefOverridesFile.append(prefOverride.leafName);
    if (existingPrefOverridesFile.exists())
      existingPrefOverridesFile.remove(false);

    prefOverride.copyTo(prefOverridesDir, null);

    // Now that we've installed the new-profile pref override file,
    // re-read the default prefs.
    var prefSvcObs = Components.classes["@mozilla.org/preferences-service;1"]
                               .getService(Components.interfaces.nsIObserver);
    prefSvcObs.observe(null, "reload-default-prefs", null);
  } catch (ex) {
    Components.utils.reportError(ex);
  }
}

// Flag used to indicate that the arguments to openWindow can be passed directly.
const NO_EXTERNAL_URIS = 1;

function openWindow(parent, url, target, features, args, noExternalArgs) {
  var wwatch = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
                         .getService(nsIWindowWatcher);

  if (noExternalArgs == NO_EXTERNAL_URIS) {
    // Just pass in the defaultArgs directly
    var argstring;
    if (args) {
      argstring = Components.classes["@mozilla.org/supports-string;1"]
                            .createInstance(nsISupportsString);
      argstring.data = args;
    }

    return wwatch.openWindow(parent, url, target, features, argstring);
  }
  
  // Pass an array to avoid the browser "|"-splitting behavior.
  var argArray = Components.classes["@mozilla.org/supports-array;1"]
                    .createInstance(Components.interfaces.nsISupportsArray);

  // add args to the arguments array
  var stringArgs = null;
  if (args instanceof Array) // array
    stringArgs = args;
  else if (args) // string
    stringArgs = [args];

  if (stringArgs) {
    // put the URIs into argArray
    var uriArray = Components.classes["@mozilla.org/supports-array;1"]
                       .createInstance(Components.interfaces.nsISupportsArray);
    stringArgs.forEach(function (uri) {
      var sstring = Components.classes["@mozilla.org/supports-string;1"]
                              .createInstance(nsISupportsString);
      sstring.data = uri;
      uriArray.AppendElement(sstring);
    });
    argArray.AppendElement(uriArray);
  } else {
    argArray.AppendElement(null);
  }

  // Pass these as null to ensure that we always trigger the "single URL"
  // behavior in browser.js's BrowserStartup (which handles the window
  // arguments)
  argArray.AppendElement(null); // charset
  argArray.AppendElement(null); // referer
  argArray.AppendElement(null); // postData
  argArray.AppendElement(null); // allowThirdPartyFixup

  return wwatch.openWindow(parent, url, target, features, argArray);
}

function openPreferences() {
  var features = "chrome,titlebar,toolbar,centerscreen,dialog=no";
  var url = "chrome://browser/content/preferences/preferences.xul";

  var win = getMostRecentWindow("Browser:Preferences");
  if (win) {
    win.focus();
  } else {
    openWindow(null, url, "_blank", features);
  }
}

function getMostRecentWindow(aType) {
  var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
                     .getService(nsIWindowMediator);
  return wm.getMostRecentWindow(aType);
}

//@line 268 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"

// this returns the most recent non-popup browser window
function getMostRecentBrowserWindow() {
  var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
                     .getService(Components.interfaces.nsIWindowMediator);

//@line 275 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"
  var win = wm.getMostRecentWindow("navigator:browser", true);

  // if we're lucky, this isn't a popup, and we can just return this
  if (win && win.document.documentElement.getAttribute("chromehidden")) {
    var windowList = wm.getEnumerator("navigator:browser", true);
    // this is oldest to newest, so this gets a bit ugly
    while (windowList.hasMoreElements()) {
      var nextWin = windowList.getNext();
      if (!nextWin.document.documentElement.getAttribute("chromehidden"))
        win = nextWin;
    }
  }
//@line 300 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"

  return win;
}

function doSearch(searchTerm, cmdLine) {
  var ss = Components.classes["@mozilla.org/browser/search-service;1"]
                     .getService(nsIBrowserSearchService);

  var submission = ss.defaultEngine.getSubmission(searchTerm, null);

  // fill our nsISupportsArray with uri-as-wstring, null, null, postData
  var sa = Components.classes["@mozilla.org/supports-array;1"]
                     .createInstance(Components.interfaces.nsISupportsArray);

  var wuri = Components.classes["@mozilla.org/supports-string;1"]
                       .createInstance(Components.interfaces.nsISupportsString);
  wuri.data = submission.uri.spec;

  sa.AppendElement(wuri);
  sa.AppendElement(null);
  sa.AppendElement(null);
  sa.AppendElement(submission.postData);

  // XXXbsmedberg: use handURIToExistingBrowser to obey tabbed-browsing
  // preferences, but need nsIBrowserDOMWindow extensions

  var wwatch = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
                         .getService(nsIWindowWatcher);

  return wwatch.openWindow(null, nsBrowserContentHandler.chromeURL,
                           "_blank",
                           "chrome,dialog=no,all" +
                             nsBrowserContentHandler.getFeatures(cmdLine),
                           sa);
}

var nsBrowserContentHandler = {
  /* helper functions */

  mChromeURL : null,

  get chromeURL() {
    if (this.mChromeURL) {
      return this.mChromeURL;
    }

    var prefb = Components.classes["@mozilla.org/preferences-service;1"]
                          .getService(nsIPrefBranch);
    this.mChromeURL = prefb.getCharPref("browser.chromeURL");

    return this.mChromeURL;
  },

  /* nsISupports */
  QueryInterface : function bch_QI(iid) {
    if (!iid.equals(nsISupports) &&
        !iid.equals(nsICommandLineHandler) &&
        !iid.equals(nsIBrowserHandler) &&
        !iid.equals(nsIContentHandler) &&
        !iid.equals(nsICommandLineValidator) &&
        !iid.equals(nsIFactory))
      throw Components.results.NS_ERROR_NO_INTERFACE;

    return this;
  },

  /* nsICommandLineHandler */
  handle : function bch_handle(cmdLine) {
    if (cmdLine.handleFlag("browser", false)) {
      // Passing defaultArgs, so use NO_EXTERNAL_URIS
      openWindow(null, this.chromeURL, "_blank",
                 "chrome,dialog=no,all" + this.getFeatures(cmdLine),
                 this.defaultArgs, NO_EXTERNAL_URIS);
      cmdLine.preventDefault = true;
    }

    try {
      var remoteCommand = cmdLine.handleFlagWithParam("remote", true);
    }
    catch (e) {
      throw NS_ERROR_ABORT;
    }

    if (remoteCommand != null) {
      try {
        var a = /^\s*(\w+)\(([^\)]*)\)\s*$/.exec(remoteCommand);
        var remoteVerb;
        if (a) {
          remoteVerb = a[1].toLowerCase();
          var remoteParams = [];
          var sepIndex = a[2].lastIndexOf(",");
          if (sepIndex == -1)
            remoteParams[0] = a[2];
          else {
            remoteParams[0] = a[2].substring(0, sepIndex);
            remoteParams[1] = a[2].substring(sepIndex + 1);
          }
        }

        switch (remoteVerb) {
        case "openurl":
        case "openfile":
          // openURL(<url>)
          // openURL(<url>,new-window)
          // openURL(<url>,new-tab)

          // First param is the URL, second param (if present) is the "target"
          // (tab, window)
          var url = remoteParams[0];
          var target = nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW;
          if (remoteParams[1]) {
            var targetParam = remoteParams[1].toLowerCase()
                                             .replace(/^\s*|\s*$/g, "");
            if (targetParam == "new-tab")
              target = nsIBrowserDOMWindow.OPEN_NEWTAB;
            else if (targetParam == "new-window")
              target = nsIBrowserDOMWindow.OPEN_NEWWINDOW;
            else {
              // The "target" param isn't one of our supported values, so
              // assume it's part of a URL that contains commas.
              url += "," + remoteParams[1];
            }
          }

          var uri = resolveURIInternal(cmdLine, url);
          handURIToExistingBrowser(uri, target, cmdLine);
          break;

        case "xfedocommand":
          // xfeDoCommand(openBrowser)
          if (remoteParams[0].toLowerCase() != "openbrowser")
            throw NS_ERROR_ABORT;

          // Passing defaultArgs, so use NO_EXTERNAL_URIS
          openWindow(null, this.chromeURL, "_blank",
                     "chrome,dialog=no,all" + this.getFeatures(cmdLine),
                     this.defaultArgs, NO_EXTERNAL_URIS);
          break;

        default:
          // Somebody sent us a remote command we don't know how to process:
          // just abort.
          throw "Unknown remote command.";
        }

        cmdLine.preventDefault = true;
      }
      catch (e) {
        Components.utils.reportError(e);
        // If we had a -remote flag but failed to process it, throw
        // NS_ERROR_ABORT so that the xremote code knows to return a failure
        // back to the handling code.
        throw NS_ERROR_ABORT;
      }
    }

    var uriparam;
    try {
      while ((uriparam = cmdLine.handleFlagWithParam("new-window", false))) {
        var uri = resolveURIInternal(cmdLine, uriparam);
        if (!shouldLoadURI(uri))
          continue;
        openWindow(null, this.chromeURL, "_blank",
                   "chrome,dialog=no,all" + this.getFeatures(cmdLine),
                   uri.spec);
        cmdLine.preventDefault = true;
      }
    }
    catch (e) {
      Components.utils.reportError(e);
    }

    try {
      while ((uriparam = cmdLine.handleFlagWithParam("new-tab", false))) {
        var uri = resolveURIInternal(cmdLine, uriparam);
        handURIToExistingBrowser(uri, nsIBrowserDOMWindow.OPEN_NEWTAB, cmdLine);
        cmdLine.preventDefault = true;
      }
    }
    catch (e) {
      Components.utils.reportError(e);
    }

    var chromeParam = cmdLine.handleFlagWithParam("chrome", false);
    if (chromeParam) {

      // Handle the old preference dialog URL separately (bug 285416)
      if (chromeParam == "chrome://browser/content/pref/pref.xul") {
        openPreferences();
        cmdLine.preventDefault = true;
      } else try {
        // only load URIs which do not inherit chrome privs
        var features = "chrome,dialog=no,all" + this.getFeatures(cmdLine);
        var uri = resolveURIInternal(cmdLine, chromeParam);
        var netutil = Components.classes["@mozilla.org/network/util;1"]
                                .getService(nsINetUtil);
        if (!netutil.URIChainHasFlags(uri, URI_INHERITS_SECURITY_CONTEXT)) {
          openWindow(null, uri.spec, "_blank", features);
          cmdLine.preventDefault = true;
        }
      }
      catch (e) {
        Components.utils.reportError(e);
      }
    }
    if (cmdLine.handleFlag("preferences", false)) {
      openPreferences();
      cmdLine.preventDefault = true;
    }
    if (cmdLine.handleFlag("silent", false))
      cmdLine.preventDefault = true;

    var searchParam = cmdLine.handleFlagWithParam("search", false);
    if (searchParam) {
      doSearch(searchParam, cmdLine);
      cmdLine.preventDefault = true;
    }

//@line 531 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"
  },

  helpInfo : "  -browser            Open a browser window.\n",

  /* nsIBrowserHandler */

  get defaultArgs() {
    var prefb = Components.classes["@mozilla.org/preferences-service;1"]
                          .getService(nsIPrefBranch);
    var formatter = Components.classes["@mozilla.org/toolkit/URLFormatterService;1"]
                              .getService(Components.interfaces.nsIURLFormatter);

    var overridePage = "";
    var haveUpdateSession = false;
    try {
      switch (needHomepageOverride(prefb)) {
        case OVERRIDE_NEW_PROFILE:
          // New profile
          overridePage = formatter.formatURLPref("startup.homepage_welcome_url");
          break;
        case OVERRIDE_NEW_MSTONE:
          // Existing profile, new build
          copyPrefOverride();

          // Check whether we have a session to restore. If we do, we assume
          // that this is an "update" session.
          var ss = Components.classes["@mozilla.org/browser/sessionstartup;1"]
                             .getService(Components.interfaces.nsISessionStartup);
          haveUpdateSession = ss.doRestore();
          overridePage = formatter.formatURLPref("startup.homepage_override_url");
          break;
    }
    } catch (ex) {}

    // formatURLPref might return "about:blank" if getting the pref fails
    if (overridePage == "about:blank")
      overridePage = "";

    var startPage = "";
    try {
      var choice = prefb.getIntPref("browser.startup.page");
      if (choice == 1 || choice == 3)
        startPage = this.startPage;

      if (choice == 2)
        startPage = Components.classes["@mozilla.org/browser/global-history;2"]
                              .getService(nsIBrowserHistory).lastPageVisited;
    } catch (e) {
      Components.utils.reportError(e);
    }

    if (startPage == "about:blank")
      startPage = "";

    // Only show the startPage if we're not restoring an update session.
    if (overridePage && startPage && !haveUpdateSession)
      return overridePage + "|" + startPage;

    return overridePage || startPage || "about:blank";
  },

  get startPage() {
    var prefb = Components.classes["@mozilla.org/preferences-service;1"]
                          .getService(nsIPrefBranch);

    var uri = prefb.getComplexValue("browser.startup.homepage",
                                    nsIPrefLocalizedString).data;

    if (!uri) {
      prefb.clearUserPref("browser.startup.homepage");
      uri = prefb.getComplexValue("browser.startup.homepage",
                                  nsIPrefLocalizedString).data;
    }
                                
    var count;
    try {
      count = prefb.getIntPref("browser.startup.homepage.count");
    }
    catch (e) {
      return uri;
    }

    for (var i = 1; i < count; ++i) {
      try {
        var page = prefb.getComplexValue("browser.startup.homepage." + i,
                                         nsIPrefLocalizedString).data;
        uri += "\n" + page;
      }
      catch (e) {
      }
    }

    return uri;
  },

  mFeatures : null,

  getFeatures : function bch_features(cmdLine) {
    if (this.mFeatures === null) {
      this.mFeatures = "";

      try {
        var width = cmdLine.handleFlagWithParam("width", false);
        var height = cmdLine.handleFlagWithParam("height", false);

        if (width)
          this.mFeatures += ",width=" + width;
        if (height)
          this.mFeatures += ",height=" + height;
      }
      catch (e) {
      }
    }

    return this.mFeatures;
  },

  /* nsIContentHandler */

  handleContent : function bch_handleContent(contentType, context, request) {
    try {
      var webNavInfo = Components.classes["@mozilla.org/webnavigation-info;1"]
                                 .getService(nsIWebNavigationInfo);
      if (!webNavInfo.isTypeSupported(contentType, null)) {
        throw NS_ERROR_WONT_HANDLE_CONTENT;
      }
    } catch (e) {
      throw NS_ERROR_WONT_HANDLE_CONTENT;
    }

    request.QueryInterface(nsIChannel);
    handURIToExistingBrowser(request.URI,
      nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW, null);
    request.cancel(NS_BINDING_ABORTED);
  },

  /* nsICommandLineValidator */
  validate : function bch_validate(cmdLine) {
    // Other handlers may use osint so only handle the osint flag if the url
    // flag is also present and the command line is valid.
    var osintFlagIdx = cmdLine.findFlag("osint", false);
    var urlFlagIdx = cmdLine.findFlag("url", false);
    if (urlFlagIdx > -1 && (osintFlagIdx > -1 ||
        cmdLine.state == nsICommandLine.STATE_REMOTE_EXPLICIT)) {
      var urlParam = cmdLine.getArgument(urlFlagIdx + 1);
      if (cmdLine.length != urlFlagIdx + 2 || /firefoxurl:/.test(urlParam))
        throw NS_ERROR_ABORT;
      cmdLine.handleFlag("osint", false)
    }
  },

  /* nsIFactory */
  createInstance: function bch_CI(outer, iid) {
    if (outer != null)
      throw Components.results.NS_ERROR_NO_AGGREGATION;

    return this.QueryInterface(iid);
  },
    
  lockFactory : function bch_lock(lock) {
    /* no-op */
  }
};

const bch_contractID = "@mozilla.org/browser/clh;1";
const bch_CID = Components.ID("{5d0ce354-df01-421a-83fb-7ead0990c24e}");
const CONTRACTID_PREFIX = "@mozilla.org/uriloader/content-handler;1?type=";

function handURIToExistingBrowser(uri, location, cmdLine)
{
  if (!shouldLoadURI(uri))
    return;

  var navWin = getMostRecentBrowserWindow();
  if (!navWin) {
    // if we couldn't load it in an existing window, open a new one
    openWindow(null, nsBrowserContentHandler.chromeURL, "_blank",
               "chrome,dialog=no,all" + nsBrowserContentHandler.getFeatures(cmdLine),
               uri.spec);
    return;
  }

  var navNav = navWin.QueryInterface(nsIInterfaceRequestor)
                     .getInterface(nsIWebNavigation);
  var rootItem = navNav.QueryInterface(nsIDocShellTreeItem).rootTreeItem;
  var rootWin = rootItem.QueryInterface(nsIInterfaceRequestor)
                        .getInterface(nsIDOMWindow);
  var bwin = rootWin.QueryInterface(nsIDOMChromeWindow).browserDOMWindow;
  bwin.openURI(uri, null, location,
               nsIBrowserDOMWindow.OPEN_EXTERNAL);
}


var nsDefaultCommandLineHandler = {
  /* nsISupports */
  QueryInterface : function dch_QI(iid) {
    if (!iid.equals(nsISupports) &&
        !iid.equals(nsICommandLineHandler) &&
        !iid.equals(nsIFactory))
      throw Components.results.NS_ERROR_NO_INTERFACE;

    return this;
  },

  // List of uri's that were passed via the command line without the app
  // running and have already been handled. This is compared against uri's
  // opened using DDE on Win32 so we only open one of the requests.
  _handledURIs: [ ],
//@line 742 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"

  /* nsICommandLineHandler */
  handle : function dch_handle(cmdLine) {
    var urilist = [];

//@line 768 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"

    try {
      var ar;
      while ((ar = cmdLine.handleFlagWithParam("url", false))) {
        var found = false;
        var uri = resolveURIInternal(cmdLine, ar);
        // count will never be greater than zero except on Win32.
        var count = this._handledURIs.length;
        for (var i = 0; i < count; ++i) {
          if (this._handledURIs[i].spec == uri.spec) {
            this._handledURIs.splice(i, 1);
            found = true;
            cmdLine.preventDefault = true;
            break;
          }
        }
        if (!found) {
          urilist.push(uri);
          // The requestpending command line flag is only used on Win32.
          if (cmdLine.handleFlag("requestpending", false) &&
              cmdLine.state == nsICommandLine.STATE_INITIAL_LAUNCH)
            this._handledURIs.push(uri)
        }
      }
    }
    catch (e) {
      Components.utils.reportError(e);
    }

    count = cmdLine.length;

    for (i = 0; i < count; ++i) {
      var curarg = cmdLine.getArgument(i);
      if (curarg.match(/^-/)) {
        Components.utils.reportError("Warning: unrecognized command line flag " + curarg + "\n");
        // To emulate the pre-nsICommandLine behavior, we ignore
        // the argument after an unrecognized flag.
        ++i;
      } else {
        try {
          urilist.push(resolveURIInternal(cmdLine, curarg));
        }
        catch (e) {
          Components.utils.reportError("Error opening URI '" + curarg + "' from the command line: " + e + "\n");
        }
      }
    }

    if (urilist.length) {
      if (cmdLine.state != nsICommandLine.STATE_INITIAL_LAUNCH &&
          urilist.length == 1) {
        // Try to find an existing window and load our URI into the
        // current tab, new tab, or new window as prefs determine.
        try {
          handURIToExistingBrowser(urilist[0], nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW, cmdLine);
          return;
        }
        catch (e) {
        }
      }

      var URLlist = urilist.filter(shouldLoadURI).map(function (u) u.spec);
      if (URLlist.length) {
        openWindow(null, nsBrowserContentHandler.chromeURL, "_blank",
                   "chrome,dialog=no,all" + nsBrowserContentHandler.getFeatures(cmdLine),
                   URLlist);
      }

    }
    else if (!cmdLine.preventDefault) {
      // Passing defaultArgs, so use NO_EXTERNAL_URIS
      openWindow(null, nsBrowserContentHandler.chromeURL, "_blank",
                 "chrome,dialog=no,all" + nsBrowserContentHandler.getFeatures(cmdLine),
                 nsBrowserContentHandler.defaultArgs, NO_EXTERNAL_URIS);
    }
  },

  // XXX localize me... how?
  helpInfo : "Usage: firefox [-flags] [<url>]\n",

  /* nsIFactory */
  createInstance: function dch_CI(outer, iid) {
    if (outer != null)
      throw Components.results.NS_ERROR_NO_AGGREGATION;

    return this.QueryInterface(iid);
  },
    
  lockFactory : function dch_lock(lock) {
    /* no-op */
  }
};

const dch_contractID = "@mozilla.org/browser/final-clh;1";
const dch_CID = Components.ID("{47cd0651-b1be-4a0f-b5c4-10e5a573ef71}");

var Module = {
  /* nsISupports */
  QueryInterface: function mod_QI(iid) {
    if (iid.equals(Components.interfaces.nsIModule) ||
        iid.equals(Components.interfaces.nsISupports))
      return this;

    throw Components.results.NS_ERROR_NO_INTERFACE;
  },

  /* nsIModule */
  getClassObject: function mod_getco(compMgr, cid, iid) {
    if (cid.equals(bch_CID))
      return nsBrowserContentHandler.QueryInterface(iid);

    if (cid.equals(dch_CID))
      return nsDefaultCommandLineHandler.QueryInterface(iid);

    throw Components.results.NS_ERROR_NO_INTERFACE;
  },
    
  registerSelf: function mod_regself(compMgr, fileSpec, location, type) {
    if (Components.classes["@mozilla.org/xre/app-info;1"]) {
      // Don't register these if Firefox is launching a XULRunner application
      const FIREFOX_UID = "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}";
      var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                              .getService(Components.interfaces.nsIXULAppInfo);
      if (appInfo.ID != FIREFOX_UID)
        return;
    }

    var compReg =
      compMgr.QueryInterface( Components.interfaces.nsIComponentRegistrar );

    compReg.registerFactoryLocation( bch_CID,
                                     "nsBrowserContentHandler",
                                     bch_contractID,
                                     fileSpec,
                                     location,
                                     type );
    compReg.registerFactoryLocation( dch_CID,
                                     "nsDefaultCommandLineHandler",
                                     dch_contractID,
                                     fileSpec,
                                     location,
                                     type );

    function registerType(contentType) {
      compReg.registerFactoryLocation( bch_CID,
                                       "Browser Cmdline Handler",
                                       CONTRACTID_PREFIX + contentType,
                                       fileSpec,
                                       location,
                                       type );
    }

    registerType("text/html");
    registerType("application/vnd.mozilla.xul+xml");
//@line 923 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"
    registerType("image/svg+xml");
//@line 925 "/builddir/build/BUILD/firefox-3.0.18/mozilla/browser/components/nsBrowserContentHandler.js"
    registerType("text/rdf");
    registerType("text/xml");
    registerType("application/xhtml+xml");
    registerType("text/css");
    registerType("text/plain");
    registerType("image/gif");
    registerType("image/jpeg");
    registerType("image/jpg");
    registerType("image/png");
    registerType("image/bmp");
    registerType("image/x-icon");
    registerType("image/vnd.microsoft.icon");
    registerType("image/x-xbitmap");
    registerType("application/http-index-format");

    var catMan = Components.classes["@mozilla.org/categorymanager;1"]
                           .getService(nsICategoryManager);

    catMan.addCategoryEntry("command-line-handler",
                            "m-browser",
                            bch_contractID, true, true);
    catMan.addCategoryEntry("command-line-handler",
                            "x-default",
                            dch_contractID, true, true);
    catMan.addCategoryEntry("command-line-validator",
                            "b-browser",
                            bch_contractID, true, true);
  },
    
  unregisterSelf : function mod_unregself(compMgr, location, type) {
    var compReg = compMgr.QueryInterface(nsIComponentRegistrar);
    compReg.unregisterFactoryLocation(bch_CID, location);
    compReg.unregisterFactoryLocation(dch_CID, location);

    var catMan = Components.classes["@mozilla.org/categorymanager;1"]
                           .getService(nsICategoryManager);

    catMan.deleteCategoryEntry("command-line-handler",
                               "m-browser", true);
    catMan.deleteCategoryEntry("command-line-handler",
                               "x-default", true);
    catMan.deleteCategoryEntry("command-line-validator",
                               "b-browser", true);
  },

  canUnload: function(compMgr) {
    return true;
  }
};

// NSGetModule: Return the nsIModule object.
function NSGetModule(compMgr, fileSpec) {
  return Module;
}