зеркало из https://github.com/mozilla/pjs.git
384 строки
12 KiB
JavaScript
384 строки
12 KiB
JavaScript
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/**
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* Datasource initialization
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**/
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var gRDF = Components.classes["@mozilla.org/rdf/rdf-service;1"]
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.getService(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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changeMIMEStuff(MIME_URI(aMIMETypeString), "value", aMIMETypeString.toLowerCase());
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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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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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changeMIMEStuff(MIME_URI(this.mimeType), "editable", aIsEditableString);
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},
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get extensions()
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{
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var extensionResource = gRDF.GetUnicodeResource(NC_RDF("fileExtensions"));
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var contentTypeResource = gRDF.GetUnicodeResource(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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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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if (extString != "") {
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extString += " ";
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}
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extString += currentExtension.Value.toLowerCase();
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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.toLowerCase());
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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.toLowerCase());
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},
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clearExtensions: function ()
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{
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var extArray = this.extensions.split(" ");
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for (i = extArray.length - 1; i >= 0; --i) {
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this.removeExtension(extArray[i]);
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}
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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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changeMIMEStuff(HANDLER_URI(this.mimeType), "saveToDisk", aSavedToDisk);
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this.setHandlerProcedure("handleInternal", "false");
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this.setHandlerProcedure("useSystemDefault", "false");
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},
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get useSystemDefault()
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{
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return getHandlerInfoForType(this.URI, "useSystemDefault");
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},
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set useSystemDefault(aUseSystemDefault)
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{
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changeMIMEStuff(HANDLER_URI(this.mimeType), "useSystemDefault", aUseSystemDefault);
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this.setHandlerProcedure("handleInternal", "false");
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this.setHandlerProcedure("saveToDisk", "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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changeMIMEStuff(HANDLER_URI(this.mimeType), "handleInternal", aHandledInternally);
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this.setHandlerProcedure("saveToDisk", "false");
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this.setHandlerProcedure("useSystemDefault", "false");
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},
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setHandlerProcedure: function (aHandlerProcedure, aValue)
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{
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var handlerSource = gRDF.GetUnicodeResource(HANDLER_URI(this.mimeType));
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var handlerProperty = gRDF.GetUnicodeResource(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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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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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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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.GetUnicodeResource(MIME_URI(this.mimeType));
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var handlerProperty = gRDF.GetUnicodeResource(NC_RDF("handlerProp"));
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var handlerResource = gRDF.GetUnicodeResource(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.GetUnicodeResource(NC_RDF("externalApplication"));
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var helperAppResource = gRDF.GetUnicodeResource(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["@mozilla.org/rdf/container;1"].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.GetUnicodeResource("urn:mimetypes:root");
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container.Init(gDS, containerRes);
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var element = gRDF.GetUnicodeResource(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.GetUnicodeResource(aURI);
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var propertyResource = gRDF.GetUnicodeResource(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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return "";
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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.GetUnicodeResource(handler);
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var property = gRDF.GetUnicodeResource(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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return "";
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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.GetUnicodeResource(appURI);
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var appProperty = gRDF.GetUnicodeResource(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.GetUnicodeResource(NC_RDF("value"));
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var mimeSource = gRDF.GetUnicodeResource(MIME_URI(aMIMEType));
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var mimeLiteral = gRDF.GetLiteral(aMIMEType);
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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.GetUnicodeResource(aMIMEString);
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var valueProperty = gRDF.GetUnicodeResource(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.GetUnicodeResource(aMIMEString);
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var valueProperty = gRDF.GetUnicodeResource(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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if (currentValue) {
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gDS.Change(mimeSource, valueProperty, currentValue, mimeLiteral);
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} else {
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gDS.Assert(mimeSource, valueProperty, mimeLiteral, true);
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}
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}
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function unassertMIMEStuff(aMIMEString, aPropertyString, aValueString)
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{
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var mimeSource = gRDF.GetUnicodeResource(aMIMEString);
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var valueProperty = gRDF.GetUnicodeResource(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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function removeOverride(aMIMEType)
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{
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// remove entry from seq
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var rdfc = Components.classes["@mozilla.org/rdf/container;1"].createInstance();
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if (rdfc) {
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rdfc = rdfc.QueryInterface(Components.interfaces.nsIRDFContainer);
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if (rdfc) {
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var containerRes = gRDF.GetUnicodeResource("urn:mimetypes:root");
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rdfc.Init(gDS, containerRes);
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var element = gRDF.GetUnicodeResource(MIME_URI(aMIMEType));
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if (rdfc.IndexOf(element) != -1) {
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try {
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rdfc.RemoveElement(element, true);
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}
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catch(e) {
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// suppress (benign?) errors
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}
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}
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}
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}
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// remove items from the graph
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var urns = [ [MIME_URI, ["description", "editable", "value", "fileExtensions", "smallIcon", "largeIcon"],
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[HANDLER_URI, "handlerProp"]],
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[HANDLER_URI, ["handleInternal", "saveToDisk", "alwaysAsk", "useSystemDefault"],
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[APP_URI, "externalApplication"]],
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[APP_URI, ["path", "prettyName"]] ];
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for (var i = 0; i < urns.length; i++) {
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var mimeRes = gRDF.GetUnicodeResource(urns[i][0](aMIMEType));
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// unassert the toplevel properties
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var properties = urns[i][1];
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for (var j = 0; j < properties.length; j++) {
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var propertyRes = gRDF.GetUnicodeResource(NC_RDF(properties[j]), true);
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if (properties[j] == "fileExtensions") { // hacky. do it better next time.
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var mimeValues = gDS.GetTargets(mimeRes, propertyRes, true);
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mimeValues = mimeValues.QueryInterface(Components.interfaces.nsISimpleEnumerator);
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while (mimeValues.hasMoreElements()) {
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var currItem = mimeValues.getNext();
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if (mimeRes && propertyRes && currItem)
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gDS.Unassert(mimeRes, propertyRes, currItem, true);
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}
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}
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else {
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var mimeValue = gDS.GetTarget(mimeRes, propertyRes, true);
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if (mimeRes && propertyRes && mimeValue)
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gDS.Unassert(mimeRes, propertyRes, mimeValue, true);
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}
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}
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if ("2" in urns[i] && urns[i][2]) {
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var linkRes = gRDF.GetUnicodeResource(NC_RDF(urns[i][2][1]), true);
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var linkTarget = gRDF.GetUnicodeResource(urns[i][2][0](aMIMEType), true);
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gDS.Unassert(mimeRes, linkRes, linkTarget);
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}
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}
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try {
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gDS.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource).Flush();
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} catch(e) {
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}
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}
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function checkInput() {
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var result = true;
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// Check for empty MIME type field.
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if ( gMIMEField.value.search(/\S/) == -1 ) {
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// Input is not OK.
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result = false;
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// Focus the mime type field.
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gMIMEField.focus();
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// Put up alert. Title is same as parent dialog's.
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var title = window.document.documentElement.getAttribute( "title" );
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var text = gPrefApplicationsBundle.getString("emptyMIMEType");
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var prompter = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].getService(Components.interfaces.nsIPromptService);
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prompter.alert(window, title, text);
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}
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return result;
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}
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