349 lines
11 KiB
JavaScript
349 lines
11 KiB
JavaScript
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/**
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* Datasource initialization
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**/
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var gRDF = Components.classes["component://netscape/rdf/rdf-service"].getService();
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if (gRDF)
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gRDF = gRDF.QueryInterface(Components.interfaces.nsIRDFService);
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/**
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* Handler Override class
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**/
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function HandlerOverride(aURI)
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{
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this.URI = aURI;
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this.mUpdateMode = false;
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}
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HandlerOverride.prototype = {
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// general information
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get mimeType()
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{
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return getLiteralForContentType(this.URI, "value");
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},
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set mimeType(aMIMETypeString)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(MIME_URI(aMIMETypeString), "value", aMIMETypeString);
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else
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changeMIMEStuff(MIME_URI(aMIMETypeString), "value", aMIMETypeString);
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},
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get description()
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{
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return getLiteralForContentType(this.URI, "description");
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},
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set description(aDescriptionString)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(MIME_URI(this.mimeType), "description", aDescriptionString);
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else
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changeMIMEStuff(MIME_URI(this.mimeType), "description", aDescriptionString);
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},
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get isEditable()
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{
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return getLiteralForContentType(this.URI, "editable");
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},
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set isEditable(aIsEditableString)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(MIME_URI(this.mimeType), "editable", aIsEditableString);
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else
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changeMIMEStuff(MIME_URI(this.mimeType), "editable", aIsEditableString);
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},
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get largeIconURL()
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{
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var url = getLiteralForContentType(this.URI, "largeIcon");
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if (!url)
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url = "chrome://communicator/skin/content-large.gif";
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return url;
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},
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set largeIconURL(aLargeIconURL)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(MIME_URI(this.mimeType), "largeIcon", aLargeIconURL);
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else
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changeMIMEStuff(MIME_URI(this.mimeType), "largeIcon", aLargeIconURL);
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},
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get smallIconURL()
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{
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var url = getLiteralForContentType(this.URI, "smallIcon");
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if (!url)
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url = "chrome://communicator/skin/content-small.gif";
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return url;
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},
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set smallIconURL(aSmallIconURL)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(MIME_URI(this.mimeType), "smallIcon", aSmallIconURL);
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else
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changeMIMEStuff(MIME_URI(this.mimeType), "smallIcon", aSmallIconURL);
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},
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get extensions()
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{
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var extensionResource = gRDF.GetResource(NC_RDF("fileExtensions"));
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var contentTypeResource = gRDF.GetResource(MIME_URI(this.mimeType));
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var extensionTargets = gDS.GetTargets(contentTypeResource, extensionResource, true);
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var extString = "";
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if (extensionTargets) {
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extensionTargets = extensionTargets.QueryInterface(Components.interfaces.nsISimpleEnumerator);
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while (extensionTargets.hasMoreElements()) {
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var currentExtension = extensionTargets.getNext();
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if (currentExtension) {
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currentExtension = currentExtension.QueryInterface(Components.interfaces.nsIRDFLiteral);
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extString += currentExtension.Value.toUpperCase() + " ";
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}
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}
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}
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return extString;
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},
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addExtension: function (aExtensionString)
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{
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assertMIMEStuff(MIME_URI(this.mimeType), "fileExtensions", aExtensionString);
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},
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removeExtension: function (aExtensionString)
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{
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unassertMIMEStuff(MIME_URI(this.mimeType), "fileExtensions", aExtensionString);
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},
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// content handling
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get saveToDisk()
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{
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return getHandlerInfoForType(this.URI, "saveToDisk");
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},
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set saveToDisk(aSavedToDisk)
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{
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var handlerSource = gRDF.GetResource(HANDLER_URI(this.mimeType));
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var handlerProperty = gRDF.GetResource(NC_RDF("saveToDisk"));
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var trueLiteral = gRDF.GetLiteral("true");
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var hasSaveToDisk = gDS.HasAssertion(handlerSource, handlerProperty, trueLiteral, true);
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if (!hasSaveToDisk) {
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var falseLiteral = gRDF.GetLiteral("false");
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hasSaveToDisk = gDS.HasAssertion(handlerSource, handlerProperty, falseLiteral, true);
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}
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if (!this.mUpdateMode || !hasSaveToDisk)
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assertMIMEStuff(HANDLER_URI(this.mimeType), "saveToDisk", aSavedToDisk);
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else
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changeMIMEStuff(HANDLER_URI(this.mimeType), "saveToDisk", aSavedToDisk);
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this.setHandlerProcedure("handleInternal", "false");
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},
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get handleInternal()
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{
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return getHandlerInfoForType(this.URI, "handleInternal");
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},
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set handleInternal(aHandledInternally)
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{
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var handlerSource = gRDF.GetResource(HANDLER_URI(this.mimeType));
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var handlerProperty = gRDF.GetResource(NC_RDF("handleInternal"));
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var trueLiteral = gRDF.GetLiteral("true");
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var hasHandleInternal = gDS.HasAssertion(handlerSource, handlerProperty, trueLiteral, true);
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if (!hasHandleInternal) {
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var falseLiteral = gRDF.GetLiteral("false");
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hasHandleInternal = gDS.HasAssertion(handlerSource, handlerProperty, falseLiteral, true);
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}
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if (!this.mUpdateMode || !hasHandleInternal)
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assertMIMEStuff(HANDLER_URI(this.mimeType), "handleInternal", aHandledInternally);
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else
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changeMIMEStuff(HANDLER_URI(this.mimeType), "handleInternal", aHandledInternally);
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this.setHandlerProcedure("saveToDisk", "false");
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},
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setHandlerProcedure: function (aHandlerProcedure, aValue)
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{
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var handlerSource = gRDF.GetResource(HANDLER_URI(this.mimeType));
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var handlerProperty = gRDF.GetResource(NC_RDF(aHandlerProcedure));
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var oppositeValue = aValue == "false" ? "true" : "false";
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var trueLiteral = gRDF.GetLiteral(oppositeValue);
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var hasCounterpart = gDS.HasAssertion(handlerSource, handlerProperty, trueLiteral, true);
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if (hasCounterpart) {
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var falseLiteral = gRDF.GetLiteral(aValue);
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gDS.Change(handlerSource, handlerProperty, trueLiteral, falseLiteral);
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}
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},
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get alwaysAsk()
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{
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return getHandlerInfoForType(this.URI, "alwaysAsk");
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},
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set alwaysAsk(aAlwaysAsk)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(HANDLER_URI(this.mimeType), "alwaysAsk", aAlwaysAsk);
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else
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changeMIMEStuff(HANDLER_URI(this.mimeType), "alwaysAsk", aAlwaysAsk);
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},
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// helper application
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get appDisplayName()
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{
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return getHelperAppInfoForType(this.URI, "prettyName");
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},
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set appDisplayName(aDisplayName)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(APP_URI(this.mimeType), "prettyName", aDisplayName);
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else
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changeMIMEStuff(APP_URI(this.mimeType), "prettyName", aDisplayName);
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},
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get appPath()
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{
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return getHelperAppInfoForType(this.URI, "path");
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},
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set appPath(aAppPath)
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{
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if (!this.mUpdateMode)
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assertMIMEStuff(APP_URI(this.mimeType), "path", aAppPath);
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else
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changeMIMEStuff(APP_URI(this.mimeType), "path", aAppPath);
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},
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/**
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* After setting the various properties on this override, we need to
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* build the links between the mime type resource, the handler for that
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* resource, and the helper app (if any) associated with the resource.
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* We also need to add this mime type to the RDF seq (list) of types.
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**/
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buildLinks: function()
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{
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// assert the handler resource
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var mimeSource = gRDF.GetResource(MIME_URI(this.mimeType));
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var handlerProperty = gRDF.GetResource(NC_RDF("handlerProp"));
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var handlerResource = gRDF.GetResource(HANDLER_URI(this.mimeType));
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gDS.Assert(mimeSource, handlerProperty, handlerResource, true);
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// assert the helper app resource
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var helperAppProperty = gRDF.GetResource(NC_RDF("externalApplication"));
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var helperAppResource = gRDF.GetResource(APP_URI(this.mimeType));
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gDS.Assert(handlerResource, helperAppProperty, helperAppResource, true);
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// add the mime type to the MIME types seq
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var container = Components.classes["component://netscape/rdf/container"].createInstance();
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if (container) {
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container = container.QueryInterface(Components.interfaces.nsIRDFContainer);
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if (container) {
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var containerRes = gRDF.GetResource("urn:mimetypes:root");
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container.Init(gDS, containerRes);
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var element = gRDF.GetResource(MIME_URI(this.mimeType));
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if (container.IndexOf(element) == -1)
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container.AppendElement(element);
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}
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}
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},
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};
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/**
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* Utility functions for building URIs easily
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**/
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function NC_RDF(aProperty)
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{
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return "http://home.netscape.com/NC-rdf#" + aProperty;
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}
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function HANDLER_URI(aHandler)
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{
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return "urn:mimetype:handler:" + aHandler;
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}
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function APP_URI(aType)
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{
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return "urn:mimetype:externalApplication:" + aType;
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}
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function MIME_URI(aType)
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{
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return "urn:mimetype:" + aType;
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}
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/**
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* Utility functions for reading data from the RDF datasource
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**/
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function getLiteralForContentType(aURI, aProperty)
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{
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var contentTypeResource = gRDF.GetResource(aURI);
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var propertyResource = gRDF.GetResource(NC_RDF(aProperty));
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return getLiteral(contentTypeResource, propertyResource);
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}
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function getLiteral(aSource, aProperty)
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{
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var node = gDS.GetTarget(aSource, aProperty, true);
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if (node) {
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node = node.QueryInterface(Components.interfaces.nsIRDFLiteral);
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return node.Value;
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}
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}
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function getHandlerInfoForType(aURI, aPropertyString)
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{
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// get current selected type
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var handler = HANDLER_URI(getLiteralForContentType(aURI, "value"));
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var source = gRDF.GetResource(handler);
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var property = gRDF.GetResource(NC_RDF(aPropertyString));
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var target = gDS.GetTarget(source, property, true);
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if (target) {
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target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
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return target.Value;
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}
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}
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function getHelperAppInfoForType(aURI, aPropertyString)
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{
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var appURI = APP_URI(getLiteralForContentType(aURI, "value"));
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var appRes = gRDF.GetResource(appURI);
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var appProperty = gRDF.GetResource(NC_RDF(aPropertyString));
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return getLiteral(appRes, appProperty);
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}
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function mimeHandlerExists(aMIMEType)
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{
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var valueProperty = gRDF.GetResource(NC_RDF("value"));
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var mimeSource = gRDF.GetResource(MIME_URI(aMIMEType));
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var mimeLiteral = gRDF.GetLiteral(gMIMEField.value);
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return gDS.HasAssertion(mimeSource, valueProperty, mimeLiteral, true);
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}
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// write to the ds
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function assertMIMEStuff(aMIMEString, aPropertyString, aValueString)
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{
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var mimeSource = gRDF.GetResource(aMIMEString);
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var valueProperty = gRDF.GetResource(NC_RDF(aPropertyString));
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var mimeLiteral = gRDF.GetLiteral(aValueString);
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gDS.Assert(mimeSource, valueProperty, mimeLiteral, true);
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}
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function changeMIMEStuff(aMIMEString, aPropertyString, aValueString)
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{
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var mimeSource = gRDF.GetResource(aMIMEString);
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var valueProperty = gRDF.GetResource(NC_RDF(aPropertyString));
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var mimeLiteral = gRDF.GetLiteral(aValueString);
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var currentValue = gDS.GetTarget(mimeSource, valueProperty, true);
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gDS.Change(mimeSource, valueProperty, currentValue, mimeLiteral);
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}
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function unassertMIMEStuff(aMIMEString, aPropertyString, aValueString)
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{
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var mimeSource = gRDF.GetResource(aMIMEString);
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var valueProperty = gRDF.GetResource(NC_RDF(aPropertyString));
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var mimeLiteral = gRDF.GetLiteral(aValueString);
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gDS.Unassert(mimeSource, valueProperty, mimeLiteral, true);
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}
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