text: /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
  /* This Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  
  const NS_ERROR_MODULE_NETWORK = 2152398848;
  const NS_NET_STATUS_READ_FROM = NS_ERROR_MODULE_NETWORK + 8;
  const NS_NET_STATUS_WROTE_TO  = NS_ERROR_MODULE_NETWORK + 9;
  
  function getPanelBrowser() {
    return document.getElementById("web-panels-browser");
  }
  
  var panelProgressListener = {
    onProgressChange: function (aWebProgress, aRequest,
                                 aCurSelfProgress, aMaxSelfProgress,
                                 aCurTotalProgress, aMaxTotalProgress) {
    },
      
    onStateChange: function(aWebProgress, aRequest, aStateFlags, aStatus) {
      if (!aRequest) {
        return;
      }
  
      //ignore local/resource:/chrome: files
      if (aStatus == NS_NET_STATUS_READ_FROM || aStatus == NS_NET_STATUS_WROTE_TO) {
        return;
      }
  
      if (aStateFlags & Ci.nsIWebProgressListener.STATE_START && 
          aStateFlags & Ci.nsIWebProgressListener.STATE_IS_NETWORK) {
        window.parent.document.getElementById('sidebar-throbber').setAttribute("loading", "true");
      } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
                 aStateFlags & Ci.nsIWebProgressListener.STATE_IS_NETWORK) {
        window.parent.document.getElementById('sidebar-throbber').removeAttribute("loading");
      }
    },
  
    onLocationChange: function(aWebProgress, aRequest, aLocation, aFlags) {
      UpdateBackForwardCommands(getPanelBrowser().webNavigation);
    },
  
    onStatusChange: function(aWebProgress, aRequest, aStatus, aMessage) {
    },
  
    onSecurityChange: function(aWebProgress, aRequest, aState) { 
    },
  
    QueryInterface: function(aIID) {
      if (aIID.equals(Ci.nsIWebProgressListener) ||
          aIID.equals(Ci.nsISupportsWeakReference) ||
          aIID.equals(Ci.nsISupports)) {
        return this;
      }
      throw Cr.NS_NOINTERFACE;
    }
  };
  
  var gLoadFired = false;
  function loadWebPanel(aURI) {
    var panelBrowser = getPanelBrowser();
    if (gLoadFired) {
      panelBrowser.webNavigation
                  .loadURI(aURI, nsIWebNavigation.LOAD_FLAGS_NONE,
                           null, null, null);
    }
    panelBrowser.setAttribute("cachedurl", aURI);
  }
  
  function load() {
    var panelBrowser = getPanelBrowser();
    panelBrowser.webProgress.addProgressListener(panelProgressListener,
                                                 Ci.nsIWebProgress.NOTIFY_ALL);
    var cachedurl = panelBrowser.getAttribute("cachedurl")
    if (cachedurl) {
      panelBrowser.webNavigation
                  .loadURI(cachedurl, nsIWebNavigation.LOAD_FLAGS_NONE, null,
                           null, null);
    }
  
    gLoadFired = true;
  }
  
  function unload() {
    getPanelBrowser().webProgress.removeProgressListener(panelProgressListener);
  }
  
  function PanelBrowserStop() {
    getPanelBrowser().webNavigation.stop(nsIWebNavigation.STOP_ALL)
  }
  
  function PanelBrowserReload() {
    getPanelBrowser().webNavigation
                     .sessionHistory
                     .QueryInterface(nsIWebNavigation)
                     .reload(nsIWebNavigation.LOAD_FLAGS_NONE);
  }
  