I am developing an extension on Firefox's Addon SDK (v1.9). My extension blocks or allows resources by implementing nsIContentPolicy and testing their URIs against a database of URIs to block.
Problem
I need to have access to the tab object (if available) from the shouldLoad function of nsIContentPolicy.
I assume the part to use for this is the "context" parameter on the shouldLoad function which is nsISupports. I have tried using getTabForWindow(win) with no luck since context is not nsIDOMWindow (Identify tab that made request in Firefox Addon SDK)
The context parameter is either a document or an element. Getting from there to a window isn't hard:
var {Ci} = require("chrome");
if (!(context instanceof Ci.nsIDOMWindow))
{
// If this is an element, get the corresponding document
if (context instanceof Ci.nsIDOMNode && context.ownerDocument)
context = context.ownerDocument;
// Now we should have a document, get its window
if (context instanceof Ci.nsIDOMDocument)
context = context.defaultView;
else
context = null;
}
// If we have a window now - get the tab
if (context)
{
var tabsLib = require("tabs/tab.js");
return tabsLib.getTabForWindow(context.top);
}
else
return null;
For reference: Node, Document,window.
Related
I am having issues using the same code in two scenarios:
From a ribbon button call revisionRequested which in turn calls removeOptions and
from the form OnLoad, call removeOptions only.
The code below is my work around, but I what I originally tried was to pass the primaryControl param from revisionRequested to removeOptions in which I made formContext = primaryControl I got an error.
function revisionRequested(primaryControl) {
var formContext = primaryControl;
formContext.getAttribute("statuscode").setValue(100000009); // Revision Requested
removeOptions(0, primaryControl);
Xrm.Navigation.openAlertDialog('Your revision request has been been submitted');
}
function removeOptions(executionContext, primaryControl) {
var formContext = null;
executionContext == 0 ? formContext = primaryControl : formContext = executionContext.getFormContext();
var statusCode = formContext.getAttribute("statuscode").getText();
var statusControl = formContext.getControl("header_statuscode");
if (Xrm.Page.ui.getFormType() !== 1 && statusCode.includes('Revision')) {
statusControl.removeOption(1);
statusControl.removeOption(100000000);
statusControl.removeOption(100000001);
statusControl.removeOption(100000002);
statusControl.removeOption(100000003);
statusControl.removeOption(100000003);
statusControl.removeOption(100000004);
statusControl.removeOption(100000005);
statusControl.removeOption(100000006);
statusControl.removeOption(100000007);
statusControl.removeOption(100000008);
}
}
I believe what you want is polymorphism in JavaScript for removeOptions method, one with executionContext signature to use from form load, another one with primaryControl signature to use from ribbon. These two signatures are not same of course, and passing execution context from the form while registering event handlers have only choice to send it as first parameter.
What you did is valid workaround to utilize the reusable method in two different places with all limitations and platform design into consideration.
Read this discussion for more understanding.
The goal:
What I want to do is drag a GridViewItem from a GridView in a UWP app outside of the app to the desktop explorer. During the drop event, I want to download a file from the internet and create a StorageFile that will be used to populate the DataPackage. I want this StorageFile to be copied to the desktop. Unfortunately, when a deferral is used for UWP Drag&Drop (using SetDataProvider), as soon as you leave the app window, the request is activated and you have to populate the DataPackage with the object to be transferred. So, it seemed to me that I would need to use a deferred type of StorageFile created with CreateStreamedFileFromUriAsyc.
I do not want to pre-download the data every time I start to do a drag and drop operation. I only want to download the data when I'm actually dropping it somewhere legitimate to copy.
I know how to drag and drop a pre-existing StorageFile from UWP to Explorer (desktop) using a deferred request.
I also know how to create a StorageFile using CreateStreamedFileFromUriAsyc that will gives you a StorageFile that downloads data only when the data is requested.
When I try to combine these two ideas, windows Explorer gives me the error 'interface is not supported.'.
If I use the exact same code, but just get the file contents by calling something like GetBasicPropertiesAsync during the deferred drag handler, it works only if I hold the drag over the desktop until the file is downloaded. I can see it finishing when the drag icon changes from the 'prohibited' icon to 'copy'. If I let go of the mouse button before it is done, no copy will occur and no errors are raised.
Obviously, I would like the drag and drop to download without having to manually start it on the deferred handler. Any ideas? Is this possible?
(Yes, I realize the code to create the correct file extension is wrong/incomplete, but that's irrelevant here...)
//DragStarted Handler in constructor
DragItemsStartedCommand = ReactiveCommand.Create<DragItemsStartingEventArgs>((e) =>
{
_dragItems = e.Items.Cast<ItemViewModel>();
e.Data.Properties.Title = "Transfer file";
e.Data.Properties.Description = "desscription of transfering a file";
e.Data.Properties.FileTypes.Add(StandardDataFormats.StorageItems);
e.Data.SetDataProvider(Windows.ApplicationModel.DataTransfer.StandardDataFormats.StorageItems, OnDeferredStorageFileRequestedHandler);
e.Data.RequestedOperation = DataPackageOperation.Copy;
});
//Deferred request handler
async void OnDeferredStorageFileRequestedHandler(DataProviderRequest request)
{
DataProviderDeferral deferral = request.GetDeferral();
try
{
Task<IEnumerable<StorageFile>> task = null;
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
task = DownloadStorageFiles();
});
var result = await task;
request.SetData(result);
}
catch (Exception ex)
{
// Handle the exception
}
finally
{
deferral.Complete();
Debug.WriteLine("deferral complete!!!");
}
}
//Create StorageFile with deferred loading Task
async Task<IEnumerable<StorageFile>> DownloadStorageFiles()
{
List<StorageFile> storageItems = new List<StorageFile>();
foreach (var item in _dragItems)
{
var request = new RestSharp.RestRequest();
var defaultItemType = ItemType.MSWord;
switch (item.MimeTypeTranslated)
{
case ItemType.GoogleDocument:
case ItemType.GoogleSpreadsheet:
case ItemType.GooglePresentation:
case ItemType.GoogleDrawing:
case ItemType.GoogleScript:
request.Resource = $"files/{item.File.id}/export";
request.AddParameter("mimeType", Statics.ItemTypeDictionary.First(x => x.Value == defaultItemType).Key);
break;
default:
request.Resource = $"files/{item.File.id}";
request.AddParameter("alt", "media");
break;
}
string fileName = "";
if (item.File.name.EndsWith($".{Statics.ItemExtensionDictionary[defaultItemType]}"))
fileName = $"{item.File.name}";
else
fileName = $"{item.File.name}.{Statics.ItemExtensionDictionary[defaultItemType]}";
var uri = account.Client.GetAuthorizedUriForDownload(request);
var thumbnail = RandomAccessStreamReference.CreateFromFile(await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///StoreLogo.png")));
var storageFileDeferred = await StorageFile.CreateStreamedFileFromUriAsync(fileName, uri , thumbnail);
//var props = await storageFileDeferred.GetBasicPropertiesAsync();
storageItems.Add(file);
}
return storageItems;
}
GitHub repro of this problem:
https://github.com/limefrogyank/DragDeferredFileToDesktop
First page is a regular drag to desktop that works because StorageFile (+ underlying data) is already in assets folder
Second page shows the error generated when using a StorageFile that is created with CreateStreamedFileFromUriAsync.
Third page uses the same type of StorageFile, but with a hack to force the retrieval of data synchronously. Desktop freezes for a second until data is ready.
As of the recent Windows updates the drag n' drop of storage files on UWP apps is automatically handled by the system.
example gif.
So, either I am asking incorrectly, or it isn't possible, let's see which...
If my app (Xamarin.Forms) is launched from another app, in order to get a url from my app, how do I return that data to the calling app? I wrongly assumed SetResult and Finish, I also wrongly assumed StartActivityForResult, but there has to be a way to do this. I know how to get data INTO my app from another app, but not the same in return.
POSSIBLE PARTIAL SOLUTION -- UPDATE, FAILS
So I have to setup an interface in my PCL, and call the method from the listview item selected handler, in the Android app I can then do this:
Intent result = new Intent("com.example.RESULT_ACTION", Uri.parse("content://result_url"));
setResult(Activity.RESULT_OK, result);
finish();
(source: https://developer.android.com/training/basics/intents/filters.html)
Is this looking right, and how would I implement the same thing on iOS?
END
I deleted my previous question because I couldn't explain the problem clearly, so here goes.
I have a Xamarin Forms app, I want to use a section of this app as a gallery. Currently I have images displayed in a list, and I have an Intent filter set that launches this page when you select the app as the source for an image (such as upload image on Facebook).
My issue is that I don't know how to return the data (the selected image) back to the app / webpage that made the request. In android I understand that you would use StartActivityForResult and OnActivityResult to handle this, but I am using Xamarin Forms (Android, iOS, UWP) and can't really find a solution that could be used cross-platform.
Just a link to documentation that covers this would be great, but if you have an example then even better.
Thanks
EDIT
Here is the code used to launch the app, I am interested in getting data back from the Intent.ActionPick after the user has selected an image from a ListView, which is in a ContentPage in the PCL.
[Activity(Label = "", Icon = "#drawable/icon", Theme = "#style/DefaultTheme", MainLauncher = true, LaunchMode = LaunchMode.SingleTop,
ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
[IntentFilter(new[] { Intent.ActionSend }, Categories = new[] { Intent.CategoryDefault }, DataMimeType = #"*/*")]
[IntentFilter(new[] { Intent.ActionView, Intent.ActionPick, Intent.ActionGetContent }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryOpenable }, DataMimeType = #"*/*")]
public class MainActivity : FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
try
{
base.OnCreate(bundle);
CurrentPlatform.Init();
Xamarin.Forms.Forms.Init(this, bundle);
App _app = new App();
LoadApplication(_app);
if (Intent.Action == Intent.ActionSend)
{
var image = Intent.ClipData.GetItemAt(0);
var imageStream = ContentResolver.OpenInputStream(image.Uri);
var memOfImage = new System.IO.MemoryStream();
imageStream.CopyTo(memOfImage);
_app.UploadManager(memOfImage.ToArray()); //This allows me to upload images to my app
}
else if (Intent.Action == Intent.ActionPick)
{
_app.SelectManager(); //here is where I need help
}
else
{
_app.AuthManager(); //this is the default route
}
}
catch (Exception e)
{
}
}
It seems you cannot use remote URI to provide to calling app. Some posts I checked suggest to store the file locally and provide it's path to calling app. To avoid memory leak with many files stored I suggest to use the same file name then you will have only one file at any moment.
One more note. I tested this solution in facebook. Skype doesn't seem to accept that and, again, the posts I checked saying that Skype doesn't handle Intent properly (not sure what that means).
Now to solution. In main activity for example in OnCreate method add the follow.
ReturnImagePage is the name of my page class where I select an image
Xamarin.Forms.MessagingCenter.Subscribe<ReturnImagePage, string>(this, "imageUri", (sender, requestedUri) => {
Intent share = new Intent();
string uri = "file://" + requestedUri;
share.SetData(Android.Net.Uri.Parse(uri));
// OR
//Android.Net.Uri uri = Android.Net.Uri.Parse(requestedUri);
//Intent share = new Intent(Intent.ActionSend);
//share.PutExtra(Intent.ExtraStream, uri);
//share.SetType("image/*");
//share.AddFlags(ActivityFlags.GrantReadUriPermission);
SetResult(Result.Ok, share);
Finish();
});
Above will listen for the message when the image is selected.
Then in XFroms code when image is selected dowload it, store it, get path and send to Activity using it's path. Below is my test path
MessagingCenter.Send<ReturnImagePage, string>(this, "imageUri", "/storage/emulated/0/Android/data/ButtonRendererDemo.Droid/files/Pictures/temp/IMG_20170207_174559_21.jpg");
You can use static public class to save and access results like:
public static class StaticClass
{
public static int Result;
}
For my project, I need to study some info like "FireFox/Gecko file downloading structure overview"(if any), or somewhat "file downloading process flow chart of FireFox/Gecko". I couldn't find something like that in the Internet so far. Is there any info about it? Thanks a lot.
PS: It must include the paths about all file downloading through FireFox browser, which are via the network connection info APIs and file handling APIs, just like "httpOpenRequest" or "DoFileDownload" API(if any).
What would be the Firefox downloading process API paths?? Is there any figure or chart?
Please help me...
You are probably going to need to look at the code to get the information you desire. You will need to build the flowchart yourself.
There are a couple of different ways downloading is done in the code.
If you are talking about a Firefox add-on performing a download, then it is probably being done using Downloads.jsm (although there is an older method for doing so). The source code for that JavaScript module is at resource://gre/modules/Downloads.jsm (This URL is only valid in Firefox). There appear to be several files all located in the jsloader\resource\gre\modules directory within the zip format file called omni.ja in the root of the Firefox distribution. You can just copy that file and change the name to omni.zip and access it as a normal .zip file.
If you are wanting to know how Firefox saves a page when it is requested by the user: It is defined in the context menu with the oncommand value being gContextMenu.saveLink();. saveLink() is defined in: chrome://browser/content/nsContextMenu.js. It does some housekeeping and then calls saveHelper() which is in the same file.
The saveHelper() code is the following:
// Helper function to wait for appropriate MIME-type headers and
// then prompt the user with a file picker
saveHelper: function(linkURL, linkText, dialogTitle, bypassCache, doc) {
// canonical def in nsURILoader.h
const NS_ERROR_SAVE_LINK_AS_TIMEOUT = 0x805d0020;
// an object to proxy the data through to
// nsIExternalHelperAppService.doContent, which will wait for the
// appropriate MIME-type headers and then prompt the user with a
// file picker
function saveAsListener() {}
saveAsListener.prototype = {
extListener: null,
onStartRequest: function saveLinkAs_onStartRequest(aRequest, aContext) {
// if the timer fired, the error status will have been caused by that,
// and we'll be restarting in onStopRequest, so no reason to notify
// the user
if (aRequest.status == NS_ERROR_SAVE_LINK_AS_TIMEOUT)
return;
timer.cancel();
// some other error occured; notify the user...
if (!Components.isSuccessCode(aRequest.status)) {
try {
const sbs = Cc["#mozilla.org/intl/stringbundle;1"].
getService(Ci.nsIStringBundleService);
const bundle = sbs.createBundle(
"chrome://mozapps/locale/downloads/downloads.properties");
const title = bundle.GetStringFromName("downloadErrorAlertTitle");
const msg = bundle.GetStringFromName("downloadErrorGeneric");
const promptSvc = Cc["#mozilla.org/embedcomp/prompt-service;1"].
getService(Ci.nsIPromptService);
promptSvc.alert(doc.defaultView, title, msg);
} catch (ex) {}
return;
}
var extHelperAppSvc =
Cc["#mozilla.org/uriloader/external-helper-app-service;1"].
getService(Ci.nsIExternalHelperAppService);
var channel = aRequest.QueryInterface(Ci.nsIChannel);
this.extListener =
extHelperAppSvc.doContent(channel.contentType, aRequest,
doc.defaultView, true);
this.extListener.onStartRequest(aRequest, aContext);
},
onStopRequest: function saveLinkAs_onStopRequest(aRequest, aContext,
aStatusCode) {
if (aStatusCode == NS_ERROR_SAVE_LINK_AS_TIMEOUT) {
// do it the old fashioned way, which will pick the best filename
// it can without waiting.
saveURL(linkURL, linkText, dialogTitle, bypassCache, false,
doc.documentURIObject, doc);
}
if (this.extListener)
this.extListener.onStopRequest(aRequest, aContext, aStatusCode);
},
onDataAvailable: function saveLinkAs_onDataAvailable(aRequest, aContext,
aInputStream,
aOffset, aCount) {
this.extListener.onDataAvailable(aRequest, aContext, aInputStream,
aOffset, aCount);
}
}
function callbacks() {}
callbacks.prototype = {
getInterface: function sLA_callbacks_getInterface(aIID) {
if (aIID.equals(Ci.nsIAuthPrompt) || aIID.equals(Ci.nsIAuthPrompt2)) {
// If the channel demands authentication prompt, we must cancel it
// because the save-as-timer would expire and cancel the channel
// before we get credentials from user. Both authentication dialog
// and save as dialog would appear on the screen as we fall back to
// the old fashioned way after the timeout.
timer.cancel();
channel.cancel(NS_ERROR_SAVE_LINK_AS_TIMEOUT);
}
throw Cr.NS_ERROR_NO_INTERFACE;
}
}
// if it we don't have the headers after a short time, the user
// won't have received any feedback from their click. that's bad. so
// we give up waiting for the filename.
function timerCallback() {}
timerCallback.prototype = {
notify: function sLA_timer_notify(aTimer) {
channel.cancel(NS_ERROR_SAVE_LINK_AS_TIMEOUT);
return;
}
}
// set up a channel to do the saving
var ioService = Cc["#mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
var channel = ioService.newChannelFromURI(makeURI(linkURL));
if (channel instanceof Ci.nsIPrivateBrowsingChannel) {
let docIsPrivate = PrivateBrowsingUtils.isWindowPrivate(doc.defaultView);
channel.setPrivate(docIsPrivate);
}
channel.notificationCallbacks = new callbacks();
let flags = Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS;
if (bypassCache)
flags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
if (channel instanceof Ci.nsICachingChannel)
flags |= Ci.nsICachingChannel.LOAD_BYPASS_LOCAL_CACHE_IF_BUSY;
channel.loadFlags |= flags;
if (channel instanceof Ci.nsIHttpChannel) {
channel.referrer = doc.documentURIObject;
if (channel instanceof Ci.nsIHttpChannelInternal)
channel.forceAllowThirdPartyCookie = true;
}
// fallback to the old way if we don't see the headers quickly
var timeToWait =
gPrefService.getIntPref("browser.download.saveLinkAsFilenameTimeout");
var timer = Cc["#mozilla.org/timer;1"].createInstance(Ci.nsITimer);
timer.initWithCallback(new timerCallback(), timeToWait,
timer.TYPE_ONE_SHOT);
// kick off the channel with our proxy object as the listener
channel.asyncOpen(new saveAsListener(), null);
}
For connecting to webservices i wrote the following code.
WebClient wc = new WebClient();
wc.DownloadStringAsync(new Uri("http://www.Webservices.asmx"));
wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);
void wc_DownloadStringCompleted(object sender,DownloadStringCompletedEventArgs e)
{
Debug.WriteLine("Web service says: " + e.Result);
using (var reader = new StringReader(e.Result))
{
String str = reader.ReadToEnd();
}
}
by using above code Get the string result.But i want get the result in HTMLVisulaizer then i know the what are the methods having that webservice.then i can easily access the particular method.
Please tell me how to call a web service method in Windows phone 7?in webservice i am having 5 webmethods.how to get that and how to call the Particular webmenthod.
Please tell me thanks in advance.
#venkateswara Are you talking about obtaining a list of known WebReference methods so you know which one to call in you code? Do you not see the this of known method calls when you add the WebReference to your WP7 project? Since you will be developing the WP7 app in VS I can't see the reason you would want to do this. Even if you don't own the webservice yourself, you will need to connect to it from VS in order to add the reference to your project.
Below is the screen in VS2010 where a WebReference is added. The Operations are listed on the right.
Once added you can use the ObjectBrowser to understand how the methods should be called.
Please let me know if I have missed something from your question.
#Jason James
The first step:
You must add referent Services ,like Jason James has very detailed instructions .
step 2 :
You can open App.xaml.cs , in Functions Apps
public Apps()
{
// Global handler for uncaught exceptions.
UnhandledException += Application_UnhandledException;
// Show graphics profiling information while debugging.
if (System.Diagnostics.Debugger.IsAttached)
{
// Display the current frame rate counters.
Application.Current.Host.Settings.EnableFrameRateCounter = true;
// Show the areas of the app that are being redrawn in each frame.
//Application.Current.Host.Settings.EnableRedrawRegions = true;
// Enable non-production analysis visualization mode,
// which shows areas of a page that are being GPU accelerated with a colored overlay.
//Application.Current.Host.Settings.EnableCacheVisualization = true;
}
// You can declare objects here that you will use
//Examlpe: NameservicesReferent.(Function that returns services) = new NameservicesReferent.(Function that returns services)();
Ws_Function = new Nameservices.ServiceSoapClient();
}
step 3:
in Mainpage.xaml.cs
GlobalVariables.Ws_advertise.getLinkAdvertiseIndexCompleted += new EventHandler<advertise.getLinkAdvertiseIndexCompletedEventArgs>(Ws_advertise_getLinkAdvertiseIndexCompleted);
GlobalVariables.***NameWedservise***.getLinkAdvertiseIndexAsync("**parameters to be passed**");
step 4:
void Ws_advertise_getLinkAdvertiseIndexCompleted(object sender, advertise.getLinkAdvertiseIndexCompletedEventArgs e)
{
//function returns the results to you, the example here is an array
string[] array = null;
try
{
array = e.result;
if(array != null)
}
cath(exception ex)
{
}
finally
{
array = null;
GlobalVariables.Ws_advertise.getLinkAdvertiseIndexCompleted -= new EventHandler<advertise.getLinkAdvertiseIndexCompletedEventArgs>(Ws_advertise_getLinkAdvertiseIndexCompleted);
}
}