RetroZilla/xpfe/components/prefwindow/resources/content/overrideHandler.js
2015-10-20 23:03:22 -04:00

384 lines
12 KiB
JavaScript

/**
* Datasource initialization
**/
var gRDF = Components.classes["@mozilla.org/rdf/rdf-service;1"]
.getService(Components.interfaces.nsIRDFService);
/**
* Handler Override class
**/
function HandlerOverride(aURI)
{
this.URI = aURI;
this.mUpdateMode = false;
}
HandlerOverride.prototype = {
// general information
get mimeType()
{
return getLiteralForContentType(this.URI, "value");
},
set mimeType(aMIMETypeString)
{
changeMIMEStuff(MIME_URI(aMIMETypeString), "value", aMIMETypeString.toLowerCase());
},
get description()
{
return getLiteralForContentType(this.URI, "description");
},
set description(aDescriptionString)
{
changeMIMEStuff(MIME_URI(this.mimeType), "description", aDescriptionString);
},
get isEditable()
{
return getLiteralForContentType(this.URI, "editable");
},
set isEditable(aIsEditableString)
{
changeMIMEStuff(MIME_URI(this.mimeType), "editable", aIsEditableString);
},
get extensions()
{
var extensionResource = gRDF.GetUnicodeResource(NC_RDF("fileExtensions"));
var contentTypeResource = gRDF.GetUnicodeResource(MIME_URI(this.mimeType));
var extensionTargets = gDS.GetTargets(contentTypeResource, extensionResource, true);
var extString = "";
if (extensionTargets) {
while (extensionTargets.hasMoreElements()) {
var currentExtension = extensionTargets.getNext();
if (currentExtension) {
currentExtension = currentExtension.QueryInterface(Components.interfaces.nsIRDFLiteral);
if (extString != "") {
extString += " ";
}
extString += currentExtension.Value.toLowerCase();
}
}
}
return extString;
},
addExtension: function (aExtensionString)
{
assertMIMEStuff(MIME_URI(this.mimeType), "fileExtensions", aExtensionString.toLowerCase());
},
removeExtension: function (aExtensionString)
{
unassertMIMEStuff(MIME_URI(this.mimeType), "fileExtensions", aExtensionString.toLowerCase());
},
clearExtensions: function ()
{
var extArray = this.extensions.split(" ");
for (i = extArray.length - 1; i >= 0; --i) {
this.removeExtension(extArray[i]);
}
},
// content handling
get saveToDisk()
{
return getHandlerInfoForType(this.URI, "saveToDisk");
},
set saveToDisk(aSavedToDisk)
{
changeMIMEStuff(HANDLER_URI(this.mimeType), "saveToDisk", aSavedToDisk);
this.setHandlerProcedure("handleInternal", "false");
this.setHandlerProcedure("useSystemDefault", "false");
},
get useSystemDefault()
{
return getHandlerInfoForType(this.URI, "useSystemDefault");
},
set useSystemDefault(aUseSystemDefault)
{
changeMIMEStuff(HANDLER_URI(this.mimeType), "useSystemDefault", aUseSystemDefault);
this.setHandlerProcedure("handleInternal", "false");
this.setHandlerProcedure("saveToDisk", "false");
},
get handleInternal()
{
return getHandlerInfoForType(this.URI, "handleInternal");
},
set handleInternal(aHandledInternally)
{
changeMIMEStuff(HANDLER_URI(this.mimeType), "handleInternal", aHandledInternally);
this.setHandlerProcedure("saveToDisk", "false");
this.setHandlerProcedure("useSystemDefault", "false");
},
setHandlerProcedure: function (aHandlerProcedure, aValue)
{
var handlerSource = gRDF.GetUnicodeResource(HANDLER_URI(this.mimeType));
var handlerProperty = gRDF.GetUnicodeResource(NC_RDF(aHandlerProcedure));
var oppositeValue = aValue == "false" ? "true" : "false";
var trueLiteral = gRDF.GetLiteral(oppositeValue);
var hasCounterpart = gDS.HasAssertion(handlerSource, handlerProperty, trueLiteral, true);
if (hasCounterpart) {
var falseLiteral = gRDF.GetLiteral(aValue);
gDS.Change(handlerSource, handlerProperty, trueLiteral, falseLiteral);
}
},
get alwaysAsk()
{
return getHandlerInfoForType(this.URI, "alwaysAsk");
},
set alwaysAsk(aAlwaysAsk)
{
changeMIMEStuff(HANDLER_URI(this.mimeType), "alwaysAsk", aAlwaysAsk);
},
// helper application
get appDisplayName()
{
return getHelperAppInfoForType(this.URI, "prettyName");
},
set appDisplayName(aDisplayName)
{
changeMIMEStuff(APP_URI(this.mimeType), "prettyName", aDisplayName);
},
get appPath()
{
return getHelperAppInfoForType(this.URI, "path");
},
set appPath(aAppPath)
{
changeMIMEStuff(APP_URI(this.mimeType), "path", aAppPath);
},
/**
* After setting the various properties on this override, we need to
* build the links between the mime type resource, the handler for that
* resource, and the helper app (if any) associated with the resource.
* We also need to add this mime type to the RDF seq (list) of types.
**/
buildLinks: function()
{
// assert the handler resource
var mimeSource = gRDF.GetUnicodeResource(MIME_URI(this.mimeType));
var handlerProperty = gRDF.GetUnicodeResource(NC_RDF("handlerProp"));
var handlerResource = gRDF.GetUnicodeResource(HANDLER_URI(this.mimeType));
gDS.Assert(mimeSource, handlerProperty, handlerResource, true);
// assert the helper app resource
var helperAppProperty = gRDF.GetUnicodeResource(NC_RDF("externalApplication"));
var helperAppResource = gRDF.GetUnicodeResource(APP_URI(this.mimeType));
gDS.Assert(handlerResource, helperAppProperty, helperAppResource, true);
// add the mime type to the MIME types seq
var container = Components.classes["@mozilla.org/rdf/container;1"].createInstance();
if (container) {
container = container.QueryInterface(Components.interfaces.nsIRDFContainer);
if (container) {
var containerRes = gRDF.GetUnicodeResource("urn:mimetypes:root");
container.Init(gDS, containerRes);
var element = gRDF.GetUnicodeResource(MIME_URI(this.mimeType));
if (container.IndexOf(element) == -1)
container.AppendElement(element);
}
}
}
};
/**
* Utility functions for building URIs easily
**/
function NC_RDF(aProperty)
{
return "http://home.netscape.com/NC-rdf#" + aProperty;
}
function HANDLER_URI(aHandler)
{
return "urn:mimetype:handler:" + aHandler;
}
function APP_URI(aType)
{
return "urn:mimetype:externalApplication:" + aType;
}
function MIME_URI(aType)
{
return "urn:mimetype:" + aType;
}
/**
* Utility functions for reading data from the RDF datasource
**/
function getLiteralForContentType(aURI, aProperty)
{
var contentTypeResource = gRDF.GetUnicodeResource(aURI);
var propertyResource = gRDF.GetUnicodeResource(NC_RDF(aProperty));
return getLiteral(contentTypeResource, propertyResource);
}
function getLiteral(aSource, aProperty)
{
var node = gDS.GetTarget(aSource, aProperty, true);
if (node) {
node = node.QueryInterface(Components.interfaces.nsIRDFLiteral);
return node.Value;
}
return "";
}
function getHandlerInfoForType(aURI, aPropertyString)
{
// get current selected type
var handler = HANDLER_URI(getLiteralForContentType(aURI, "value"));
var source = gRDF.GetUnicodeResource(handler);
var property = gRDF.GetUnicodeResource(NC_RDF(aPropertyString));
var target = gDS.GetTarget(source, property, true);
if (target) {
target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
return target.Value;
}
return "";
}
function getHelperAppInfoForType(aURI, aPropertyString)
{
var appURI = APP_URI(getLiteralForContentType(aURI, "value"));
var appRes = gRDF.GetUnicodeResource(appURI);
var appProperty = gRDF.GetUnicodeResource(NC_RDF(aPropertyString));
return getLiteral(appRes, appProperty);
}
function mimeHandlerExists(aMIMEType)
{
var valueProperty = gRDF.GetUnicodeResource(NC_RDF("value"));
var mimeSource = gRDF.GetUnicodeResource(MIME_URI(aMIMEType));
var mimeLiteral = gRDF.GetLiteral(aMIMEType);
return gDS.HasAssertion(mimeSource, valueProperty, mimeLiteral, true);
}
// write to the ds
function assertMIMEStuff(aMIMEString, aPropertyString, aValueString)
{
var mimeSource = gRDF.GetUnicodeResource(aMIMEString);
var valueProperty = gRDF.GetUnicodeResource(NC_RDF(aPropertyString));
var mimeLiteral = gRDF.GetLiteral(aValueString);
gDS.Assert(mimeSource, valueProperty, mimeLiteral, true);
}
function changeMIMEStuff(aMIMEString, aPropertyString, aValueString)
{
var mimeSource = gRDF.GetUnicodeResource(aMIMEString);
var valueProperty = gRDF.GetUnicodeResource(NC_RDF(aPropertyString));
var mimeLiteral = gRDF.GetLiteral(aValueString);
var currentValue = gDS.GetTarget(mimeSource, valueProperty, true);
if (currentValue) {
gDS.Change(mimeSource, valueProperty, currentValue, mimeLiteral);
} else {
gDS.Assert(mimeSource, valueProperty, mimeLiteral, true);
}
}
function unassertMIMEStuff(aMIMEString, aPropertyString, aValueString)
{
var mimeSource = gRDF.GetUnicodeResource(aMIMEString);
var valueProperty = gRDF.GetUnicodeResource(NC_RDF(aPropertyString));
var mimeLiteral = gRDF.GetLiteral(aValueString);
gDS.Unassert(mimeSource, valueProperty, mimeLiteral, true);
}
function removeOverride(aMIMEType)
{
// remove entry from seq
var rdfc = Components.classes["@mozilla.org/rdf/container;1"].createInstance();
if (rdfc) {
rdfc = rdfc.QueryInterface(Components.interfaces.nsIRDFContainer);
if (rdfc) {
var containerRes = gRDF.GetUnicodeResource("urn:mimetypes:root");
rdfc.Init(gDS, containerRes);
var element = gRDF.GetUnicodeResource(MIME_URI(aMIMEType));
if (rdfc.IndexOf(element) != -1) {
try {
rdfc.RemoveElement(element, true);
}
catch(e) {
// suppress (benign?) errors
}
}
}
}
// remove items from the graph
var urns = [ [MIME_URI, ["description", "editable", "value", "fileExtensions", "smallIcon", "largeIcon"],
[HANDLER_URI, "handlerProp"]],
[HANDLER_URI, ["handleInternal", "saveToDisk", "alwaysAsk", "useSystemDefault"],
[APP_URI, "externalApplication"]],
[APP_URI, ["path", "prettyName"]] ];
for (var i = 0; i < urns.length; i++) {
var mimeRes = gRDF.GetUnicodeResource(urns[i][0](aMIMEType));
// unassert the toplevel properties
var properties = urns[i][1];
for (var j = 0; j < properties.length; j++) {
var propertyRes = gRDF.GetUnicodeResource(NC_RDF(properties[j]), true);
if (properties[j] == "fileExtensions") { // hacky. do it better next time.
var mimeValues = gDS.GetTargets(mimeRes, propertyRes, true);
mimeValues = mimeValues.QueryInterface(Components.interfaces.nsISimpleEnumerator);
while (mimeValues.hasMoreElements()) {
var currItem = mimeValues.getNext();
if (mimeRes && propertyRes && currItem)
gDS.Unassert(mimeRes, propertyRes, currItem, true);
}
}
else {
var mimeValue = gDS.GetTarget(mimeRes, propertyRes, true);
if (mimeRes && propertyRes && mimeValue)
gDS.Unassert(mimeRes, propertyRes, mimeValue, true);
}
}
if ("2" in urns[i] && urns[i][2]) {
var linkRes = gRDF.GetUnicodeResource(NC_RDF(urns[i][2][1]), true);
var linkTarget = gRDF.GetUnicodeResource(urns[i][2][0](aMIMEType), true);
gDS.Unassert(mimeRes, linkRes, linkTarget);
}
}
try {
gDS.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource).Flush();
} catch(e) {
}
}
function checkInput() {
var result = true;
// Check for empty MIME type field.
if ( gMIMEField.value.search(/\S/) == -1 ) {
// Input is not OK.
result = false;
// Focus the mime type field.
gMIMEField.focus();
// Put up alert. Title is same as parent dialog's.
var title = window.document.documentElement.getAttribute( "title" );
var text = gPrefApplicationsBundle.getString("emptyMIMEType");
var prompter = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].getService(Components.interfaces.nsIPromptService);
prompter.alert(window, title, text);
}
return result;
}