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