pjs/xpfe/communicator/resources/content/builtinURLs.js

161 строка
4.7 KiB
JavaScript

// the rdf service
var gRDFService;
var gTitleArc;
var gContentArc;
var gBuiltinUrlsDataSource;
var gDataSourceState;
var gDataSourceLoaded;
var gSinkObserverRegistered;
var SinkObserver =
{
onBeginLoad: function( aSink) {
gDataSourceState = (gDataSourceState | 1);
debug_dump("\n-> SinkObserver:onBeginLoad: " + aSink + ", gDataSourceState=" + gDataSourceState + "\n");
},
onInterrupt: function( aSink) {
gDataSourceState = (gDataSourceState | 2);
debug_dump("\n-> SinkObserver:onInterrupt: " + aSink + ", gDataSourceState=" + gDataSourceState + "\n");
},
onResume: function( aSink) {
gDataSourceState = (gDataSourceState & ~2);
debug_dump("\n-> SinkObserver:onResume: " + aSink + ", gDataSourceState=" + gDataSourceState + "\n");
},
onEndLoad: function( aSink) {
gDataSourceState = (gDataSourceState | 4);
gDataSourceLoaded = (gDataSourceState == 5);
debug_dump("\n-> onEndLoad: " + aSink + ", gDataSourceState=" + gDataSourceState + ", gDataSourceLoaded=" + gDataSourceLoaded + "\n");
if (!gDataSourceLoaded) {
debug_dump("\n-> builtin URLs not loaded!\n");
return;
}
gBuiltinUrlsDataSource = aSink.QueryInterface(Components.interfaces.nsIRDFDataSource);
debug_dump("Got gBuiltinUrlsDataSource " + gBuiltinUrlsDataSource + " with gTitleArc " + gTitleArc + " and gContentArc " + gContentArc + "\n");
},
onError: function( aSink, aStatus, aErrMsg) {
gDataSourceState = (gDataSourceState | 8);
debug_dump("\n-> SinkObserver:onError: " + aSink + ", status=" + aStatus +
", errMsg=" + aErrMsg + ", gDataSourceState=" + gDataSourceState + "\n");
}
};
function debug_dump(msg)
{
}
/*
function debug_dump(msg)
{
dump(msg);
}
*/
function loadDS()
{
debug_dump("\n-->loadDS() called for " + window.document + " <--\n");
if (gBuiltinUrlsDataSource && gDataSourceLoaded) {
debug_dump("\n-->loadDS(): gBuiltinUrlsDataSource=" + gBuiltinUrlsDataSource + ", gDataSourceLoaded=" + gDataSourceLoaded + ", returning! <--\n");
return;
}
if (gSinkObserverRegistered)
{
debug_dump("Already registered SinkObserver in loadDS()\n");
return;
}
// initialize
gRDFService = Components.classes['@mozilla.org/rdf/rdf-service;1'].getService();
gRDFService = gRDFService.QueryInterface(Components.interfaces.nsIRDFService);
if (!gRDFService) {
debug_dump("\n-->loadDS(): gRDFService service is null!\n");
return;
}
gTitleArc = gRDFService.GetResource("http://home.netscape.com/NC-rdf#title");
gContentArc = gRDFService.GetResource("http://home.netscape.com/NC-rdf#content");
var ds_uri = "chrome://global-region/locale/builtinURLs.rdf";
var url_ds = gRDFService.GetDataSource(ds_uri); // return nsIRDFDataSource
if (!url_ds) {
debug_dump("\n >>Can't get " + ds_uri + "<-\n");
return;
}
if (url_ds.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource).loaded)
{
ds_uri = "chrome://global-region/locale/builtinURLs.rdf";
gBuiltinUrlsDataSource = gRDFService.GetDataSource(ds_uri); // return nsIRDFDataSource
gDataSourceLoaded = (gBuiltinUrlsDataSource != null);
}
else
{
var rdfXMLSink = url_ds.QueryInterface( Components.interfaces.nsIRDFXMLSink );
if (rdfXMLSink) {
gBuiltinUrlsDataSource = null;
gDataSourceState = 0x0; // init.
gDataSourceLoaded = false;
gSinkObserverRegistered = true;
rdfXMLSink.addXMLSinkObserver(SinkObserver);
}
else
{
debug_dump("rdfXMLSink is null\n");
}
}
}
function xlateURL(key)
{
debug_dump("\n>> xlateURL(" + key + "): gBuiltinUrlsDataSource=" + gBuiltinUrlsDataSource + ", gDataSourceLoaded=" + gDataSourceLoaded + "\n");
if (!gBuiltinUrlsDataSource || !gDataSourceLoaded) {
throw("urn translation data source not loaded");
}
// get data
var srcNode = gRDFService.GetResource(key);
var titleTarget = gBuiltinUrlsDataSource.GetTarget(srcNode, gTitleArc, true);
if (titleTarget) {
titleTarget =
titleTarget.QueryInterface(Components.interfaces.nsIRDFLiteral);
debug_dump("\n-> " + key + "::title=" + titleTarget.Value);
}
else {
debug_dump("\n title target=" + titleTarget + "\n");
}
var contentTarget = gBuiltinUrlsDataSource.GetTarget(srcNode, gContentArc, true);
if (contentTarget) {
contentTarget =
contentTarget.QueryInterface(Components.interfaces.nsIRDFLiteral);
debug_dump("\n-> " + key + "::content=" + contentTarget.Value + "\n");
return contentTarget.Value;
}
else {
debug_dump("\n content target=" + contentTarget + "\n");
throw("urn not found in datasource");
}
// not reached
return "";
}
function loadXURL(key)
{
debug_dump("loadXURL call with " + key + "\n");
window._content.location.href = xlateURL(key);
}
loadDS();