nssidebar.js

firefox的html解析器 本程序实现了想数据库中添加多媒体文件和文件说明

                           this.rdf.GetLiteral("true"),
                           true);
    this.datasource.Unassert(this.rdf.GetResource(this.resource),
                             this.rdf.GetResource(this.nc + "refresh"),
                             this.rdf.GetLiteral("true"));

    /* Write the modified panels out. */
    this.datasource.QueryInterface(nsIRDFRemoteDataSource).Flush();

}

/* decorate prototype to provide ``class'' methods and property accessors */
nsSidebar.prototype.addSearchEngine =
function (engineURL, iconURL, suggestedTitle, suggestedCategory)
{
    debug("addSearchEngine(" + engineURL + ", " + iconURL + ", " +
          suggestedCategory + ", " + suggestedTitle + ")");

    try
    {
        // make sure using HTTP or HTTPS and refering to a .src file
        // for the engine.
        if (! /^https?:\/\/.+\.src$/i.test(engineURL))
            throw "Unsupported search engine URL";

        // make sure using HTTP or HTTPS and refering to a
        // .gif/.jpg/.jpeg/.png file for the icon.
        if (! /^https?:\/\/.+\.(gif|jpg|jpeg|png)$/i.test(iconURL))
            throw "Unsupported search icon URL";
    }
    catch(ex)
    {
        debug(ex);
        this.promptService.alert(null, "Error", "Failed to add the search engine.");
        throw Components.results.NS_ERROR_INVALID_ARG;
    }

    var titleMessage, dialogMessage;
    try {
        var stringBundle = srGetStrBundle("chrome://communicator/locale/sidebar/sidebar.properties");
        var brandStringBundle = srGetStrBundle("chrome://branding/locale/brand.properties");
        if (stringBundle) {
            sidebarName = brandStringBundle.GetStringFromName("sidebarName");
            titleMessage = stringBundle.GetStringFromName("addEngineConfirmTitle");
            dialogMessage = stringBundle.GetStringFromName("addEngineConfirmMessage");
            dialogMessage = dialogMessage.replace(/%title%/, suggestedTitle);
            dialogMessage = dialogMessage.replace(/%category%/, suggestedCategory);
            dialogMessage = dialogMessage.replace(/%url%/, engineURL);
            dialogMessage = dialogMessage.replace(/#/g, "\n");
            dialogMessage = dialogMessage.replace(/%name%/, sidebarName);
        }
    }
    catch (e) {
        titleMessage = "Add Search Engine";
        dialogMessage = "Add the following search engine?\n\nName: " + suggestedTitle;
        dialogMessage += "\nSearch Category: " + suggestedCategory;
        dialogMessage += "\nSource: " + engineURL;
    }

    var rv = this.promptService.confirm(null, titleMessage, dialogMessage);

    if (!rv)
        return;

    var internetSearch = Components.classes[NETSEARCH_CONTRACTID].getService();
    if (internetSearch)
        internetSearch = internetSearch.QueryInterface(nsIInternetSearchService);
    if (internetSearch)
    {
        internetSearch.AddSearchEngine(engineURL, iconURL, suggestedTitle,
                                       suggestedCategory);
    }
}

// property of nsIClassInfo
nsSidebar.prototype.flags = nsIClassInfo.DOM_OBJECT;

// property of nsIClassInfo
nsSidebar.prototype.classDescription = "Sidebar";

// method of nsIClassInfo
nsSidebar.prototype.getInterfaces = function(count) {
    var interfaceList = [nsISidebar, nsIClassInfo];
    count.value = interfaceList.length;
    return interfaceList;
}

// method of nsIClassInfo
nsSidebar.prototype.getHelperForLanguage = function(count) {return null;}

nsSidebar.prototype.QueryInterface =
function (iid) {
    if (iid.equals(nsISidebar) ||
        iid.equals(nsIClassInfo) ||
        iid.equals(nsISupports))
        return this;

    Components.returnCode = Components.results.NS_ERROR_NO_INTERFACE;
    return null;
}

var sidebarModule = new Object();

sidebarModule.registerSelf =
function (compMgr, fileSpec, location, type)
{
    debug("registering (all right -- a JavaScript module!)");
    compMgr = compMgr.QueryInterface(Components.interfaces.nsIComponentRegistrar);

    compMgr.registerFactoryLocation(SIDEBAR_CID,
                                    "Sidebar JS Component",
                                    SIDEBAR_CONTRACTID,
                                    fileSpec,
                                    location,
                                    type);

    const CATMAN_CONTRACTID = "@mozilla.org/categorymanager;1";
    const nsICategoryManager = Components.interfaces.nsICategoryManager;
    var catman = Components.classes[CATMAN_CONTRACTID].
                            getService(nsICategoryManager);

    const JAVASCRIPT_GLOBAL_PROPERTY_CATEGORY = "JavaScript global property";
    catman.addCategoryEntry(JAVASCRIPT_GLOBAL_PROPERTY_CATEGORY,
                            "sidebar",
                            SIDEBAR_CONTRACTID,
                            true,
                            true);
}

sidebarModule.getClassObject =
function (compMgr, cid, iid) {
    if (!cid.equals(SIDEBAR_CID))
        throw Components.results.NS_ERROR_NO_INTERFACE;

    if (!iid.equals(Components.interfaces.nsIFactory))
        throw Components.results.NS_ERROR_NOT_IMPLEMENTED;

    return sidebarFactory;
}

sidebarModule.canUnload =
function(compMgr)
{
    debug("Unloading component.");
    return true;
}

/* factory object */
var sidebarFactory = new Object();

sidebarFactory.createInstance =
function (outer, iid) {
    debug("CI: " + iid);
    if (outer != null)
        throw Components.results.NS_ERROR_NO_AGGREGATION;

    return (new nsSidebar()).QueryInterface(iid);
}

/* entrypoint */
function NSGetModule(compMgr, fileSpec) {
    return sidebarModule;
}

/* static functions */
if (DEBUG)
    debug = function (s) { dump("-*- sidebar component: " + s + "\n"); }
else
    debug = function (s) {}

function getSidebarDatasourceURI(panels_file_id)
{
    try
    {
        /* use the fileLocator to look in the profile directory
         * to find 'panels.rdf', which is the
         * database of the user's currently selected panels. */
        var directory_service = Components.classes[DIR_SERV_CONTRACTID].getService(Components.interfaces.nsIProperties);

        /* if <profile>/panels.rdf doesn't exist, get will copy
         *bin/defaults/profile/panels.rdf to <profile>/panels.rdf */
        var sidebar_file = directory_service.get(panels_file_id, Components.interfaces.nsIFile);

        if (!sidebar_file.exists())
        {
            /* this should not happen, as GetFileLocation() should copy
             * defaults/panels.rdf to the users profile directory */
            debug("sidebar file does not exist");
            return null;
        }

        var io_service = Components.classes[IO_SERV_CONTRACTID].getService(Components.interfaces.nsIIOService);
        var file_handler = io_service.getProtocolHandler("file").QueryInterface(Components.interfaces.nsIFileProtocolHandler);
        var sidebar_uri = file_handler.getURLSpecFromFile(sidebar_file);
        debug("sidebar uri is " + sidebar_uri);
        return sidebar_uri;
    }
    catch (ex)
    {
        /* this should not happen */
        debug("caught " + ex + " getting sidebar datasource uri");
        return null;
    }
}


var strBundleService = null;
function srGetStrBundle(path)
{
   var strBundle = null;
   if (!strBundleService) {
       try {
          strBundleService =
          Components.classes["@mozilla.org/intl/stringbundle;1"].getService();
          strBundleService =
          strBundleService.QueryInterface(Components.interfaces.nsIStringBundleService);
       } catch (ex) {
          dump("\n--** strBundleService failed: " + ex + "\n");
          return null;
      }
   }
   strBundle = strBundleService.createBundle(path);
   if (!strBundle) {
       dump("\n--** strBundle createInstance failed **--\n");
   }
   return strBundle;
}