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HelperClasses.cs
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HelperClasses.cs
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// Copyright (c) 2018, Rene Lergner - wpinternals.net - @Heathcliff74xda
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Some of the classes and functions in this file were found online.
// Where possible the original authors are referenced.
using System;
using System.IO;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Threading;
using System.Windows.Input;
using System.Windows.Threading;
using System.IO.Compression;
using System.Collections;
using System.Reflection;
using System.Net;
namespace WPinternals
{
internal delegate void SetWorkingStatus(string Message, string SubMessage = null, ulong? MaxProgressValue = null, bool ShowAnimation = true, WPinternalsStatus Status = WPinternalsStatus.Undefined);
internal delegate void UpdateWorkingStatus(string Message, string SubMessage = null, ulong? CurrentProgressValue = null, WPinternalsStatus Status = WPinternalsStatus.Undefined);
internal delegate void ExitSuccess(string Message, string SubMessage = null);
internal delegate void ExitFailure(string Message, string SubMessage = null);
internal enum WPinternalsStatus
{
Undefined,
Scanning,
Flashing,
Patching,
WaitingForManualReset,
SwitchingMode,
Initializing
};
public class BooleanConverter : DependencyObject, IValueConverter
{
public static readonly DependencyProperty OnTrueProperty =
DependencyProperty.Register("OnTrue", typeof(object), typeof(BooleanConverter),
new PropertyMetadata(default(object)));
public static readonly DependencyProperty OnFalseProperty =
DependencyProperty.Register("OnFalse", typeof(object), typeof(BooleanConverter),
new PropertyMetadata(default(object)));
public static readonly DependencyProperty OnNullProperty =
DependencyProperty.Register("OnNull", typeof(object), typeof(BooleanConverter),
new PropertyMetadata(default(object)));
public object OnTrue
{
get { return GetValue(OnTrueProperty); }
set { SetValue(OnTrueProperty, value); }
}
public object OnFalse
{
get { return GetValue(OnFalseProperty); }
set { SetValue(OnFalseProperty, value); }
}
public object OnNull
{
get { return GetValue(OnNullProperty); }
set { SetValue(OnNullProperty, value); }
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
value = value == null
? OnNull ?? Default(targetType)
: (string.Equals(value.ToString(), false.ToString(), StringComparison.CurrentCultureIgnoreCase)
? OnFalse
: OnTrue);
return value;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == OnNull) return Default(targetType);
if (value == OnFalse) return false;
if (value == OnTrue) return true;
if (value == null) return null;
if (OnNull != null &&
string.Equals(value.ToString(), OnNull.ToString(), StringComparison.CurrentCultureIgnoreCase))
return Default(targetType);
if (OnFalse != null &&
string.Equals(value.ToString(), OnFalse.ToString(), StringComparison.CurrentCultureIgnoreCase))
return false;
if (OnTrue != null &&
string.Equals(value.ToString(), OnTrue.ToString(), StringComparison.CurrentCultureIgnoreCase))
return true;
return null;
}
public static object Default(Type type)
{
return type.IsValueType ? Activator.CreateInstance(type) : null;
}
}
public class HexConverter : DependencyObject, IValueConverter
{
public static readonly DependencyProperty SeparatorProperty =
DependencyProperty.Register("OnTrue", typeof(object), typeof(HexConverter),
new PropertyMetadata(" "));
public object Separator
{
get { return GetValue(SeparatorProperty); }
set { SetValue(SeparatorProperty, value); }
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value is byte[])
{
byte[] bytes = (byte[])value;
StringBuilder s = new StringBuilder(1000);
for (int i = bytes.GetLowerBound(0); i <= bytes.GetUpperBound(0); i++)
{
if (i != bytes.GetLowerBound(0))
s.Append(Separator);
s.Append(bytes[i].ToString("X2"));
}
return s.ToString();
}
else
return "";
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public static object Default(Type type)
{
return type.IsValueType ? Activator.CreateInstance(type) : null;
}
}
public class ObjectToVisibilityConverter : DependencyObject, IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null)
return "Collapsed";
else
return "Visible";
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public static object Default(Type type)
{
return type.IsValueType ? Activator.CreateInstance(type) : null;
}
}
public class InverseObjectToVisibilityConverter : DependencyObject, IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null)
return "Visible";
else
return "Collapsed";
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public static object Default(Type type)
{
return type.IsValueType ? Activator.CreateInstance(type) : null;
}
}
internal class CollapsibleRun : Run
{
private string CollapsibleText;
protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
CollapsibleText = Text;
}
public Boolean IsVisible
{
get
{
return (Boolean)this.GetValue(IsVisibleProperty);
}
set
{
this.SetValue(IsVisibleProperty, value);
}
}
public static readonly DependencyProperty IsVisibleProperty = DependencyProperty.Register(
"IsVisible", typeof(Boolean), typeof(CollapsibleRun), new PropertyMetadata(true, IsVisibleChanged));
public static void IsVisibleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
((CollapsibleRun)d).Text = ((CollapsibleRun)d).CollapsibleText;
else
((CollapsibleRun)d).Text = String.Empty;
}
}
internal class CollapsibleSection : Section
{
public CollapsibleSection()
{
CollapsibleBlocks = new List<Block>();
}
protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
foreach (Block Block in Blocks)
CollapsibleBlocks.Add(Block);
Blocks.Clear();
}
public List<Block> CollapsibleBlocks { get; private set; }
public Boolean IsCollapsed
{
get
{
return (Boolean)this.GetValue(IsCollapsedProperty);
}
set
{
this.SetValue(IsCollapsedProperty, value);
Blocks.Clear();
if (IsInitialized)
{
if (!value)
{
foreach (Block Block in CollapsibleBlocks)
Blocks.Add(Block);
}
}
}
}
public static readonly DependencyProperty IsCollapsedProperty = DependencyProperty.Register(
"IsCollapsed", typeof(Boolean), typeof(CollapsibleSection), new PropertyMetadata(false));
}
// Overloaded Paragraph class to remove empty Run-elements, caused by auto-formatting new-lines in the XAML
// Use local:Paragraph in a FlowDocument
// This correction only works at run-time
public class Paragraph : System.Windows.Documents.Paragraph
{
protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
int inlinesCount = this.Inlines.Count;
for (int i = 0; i < inlinesCount; i++)
{
System.Windows.Documents.Inline inline = this.Inlines.ElementAt(i);
if (inline is System.Windows.Documents.Run)
{
if ((inline as System.Windows.Documents.Run).Text == Convert.ToChar(32).ToString()) //ACSII 32 is the white space
{
(inline as System.Windows.Documents.Run).Text = string.Empty;
}
}
}
}
}
internal class ArrivalEventArgs : EventArgs
{
public PhoneInterfaces NewInterface;
public IDisposable NewModel;
public ArrivalEventArgs(PhoneInterfaces NewInterface, IDisposable NewModel)
: base()
{
this.NewInterface = NewInterface;
this.NewModel = NewModel;
}
}
internal static class BigEndian
{
public static byte[] GetBytes(object Value)
{
byte[] Bytes;
if (Value is short)
Bytes = BitConverter.GetBytes((short)Value);
else if (Value is ushort)
Bytes = BitConverter.GetBytes((ushort)Value);
else if (Value is int)
Bytes = BitConverter.GetBytes((int)Value);
else if (Value is uint)
Bytes = BitConverter.GetBytes((uint)Value);
else
throw new NotSupportedException();
byte[] Result = new byte[Bytes.Length];
for (int i = 0; i < Bytes.Length; i++)
Result[i] = Bytes[Bytes.Length - 1 - i];
return Result;
}
public static byte[] GetBytes(object Value, int Width)
{
byte[] Result;
byte[] BigEndianBytes = GetBytes(Value);
if (BigEndianBytes.Length == Width)
return BigEndianBytes;
else if (BigEndianBytes.Length > Width)
{
Result = new byte[Width];
System.Buffer.BlockCopy(BigEndianBytes, BigEndianBytes.Length - Width, Result, 0, Width);
return Result;
}
else
{
Result = new byte[Width];
System.Buffer.BlockCopy(BigEndianBytes, 0, Result, Width - BigEndianBytes.Length, BigEndianBytes.Length);
return Result;
}
}
public static UInt16 ToUInt16(byte[] Buffer, int Offset)
{
byte[] Bytes = new byte[2];
for (int i = 0; i < 2; i++)
Bytes[i] = Buffer[Offset + 1 - i];
return BitConverter.ToUInt16(Bytes, 0);
}
public static Int16 ToInt16(byte[] Buffer, int Offset)
{
byte[] Bytes = new byte[2];
for (int i = 0; i < 2; i++)
Bytes[i] = Buffer[Offset + 1 - i];
return BitConverter.ToInt16(Bytes, 0);
}
public static UInt32 ToUInt32(byte[] Buffer, int Offset)
{
byte[] Bytes = new byte[4];
for (int i = 0; i < 4; i++)
Bytes[i] = Buffer[Offset + 3 - i];
return BitConverter.ToUInt32(Bytes, 0);
}
public static Int32 ToInt32(byte[] Buffer, int Offset)
{
byte[] Bytes = new byte[4];
for (int i = 0; i < 4; i++)
Bytes[i] = Buffer[Offset + 3 - i];
return BitConverter.ToInt32(Bytes, 0);
}
}
// This class was found online.
// Original author is probably: mdm20
// https://stackoverflow.com/questions/5566330/get-gif-to-play-in-wpf-with-gifimage-class/5568703#5568703
internal class GifImage : Image
{
private bool _isInitialized;
private GifBitmapDecoder _gifDecoder;
private Int32Animation _animation;
public int FrameIndex
{
get { return (int)GetValue(FrameIndexProperty); }
set { SetValue(FrameIndexProperty, value); }
}
private void Initialize()
{
_gifDecoder = new GifBitmapDecoder(new Uri("pack://application:,,," + this.GifSource), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
_animation = new Int32Animation(0, _gifDecoder.Frames.Count - 1, new Duration(new TimeSpan(0, 0, 0, _gifDecoder.Frames.Count / 10, (int)((_gifDecoder.Frames.Count / 10.0 - _gifDecoder.Frames.Count / 10) * 1000))));
_animation.RepeatBehavior = RepeatBehavior.Forever;
this.Source = _gifDecoder.Frames[0];
_isInitialized = true;
}
static GifImage()
{
VisibilityProperty.OverrideMetadata(typeof(GifImage),
new FrameworkPropertyMetadata(VisibilityPropertyChanged));
}
private static void VisibilityPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
if ((Visibility)e.NewValue == Visibility.Visible)
{
((GifImage)sender).StartAnimation();
}
else
{
((GifImage)sender).StopAnimation();
}
}
public static readonly DependencyProperty FrameIndexProperty =
DependencyProperty.Register("FrameIndex", typeof(int), typeof(GifImage), new UIPropertyMetadata(0, new PropertyChangedCallback(ChangingFrameIndex)));
static void ChangingFrameIndex(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
{
var gifImage = obj as GifImage;
gifImage.Source = gifImage._gifDecoder.Frames[(int)ev.NewValue];
}
public bool AutoStart
{
get { return (bool)GetValue(AutoStartProperty); }
set { SetValue(AutoStartProperty, value); }
}
public static readonly DependencyProperty AutoStartProperty =
DependencyProperty.Register("AutoStart", typeof(bool), typeof(GifImage), new UIPropertyMetadata(false, AutoStartPropertyChanged));
private static void AutoStartPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
(sender as GifImage).StartAnimation();
}
public string GifSource
{
get { return (string)GetValue(GifSourceProperty); }
set { SetValue(GifSourceProperty, value); }
}
public static readonly DependencyProperty GifSourceProperty =
DependencyProperty.Register("GifSource", typeof(string), typeof(GifImage), new UIPropertyMetadata(string.Empty, GifSourcePropertyChanged));
private static void GifSourcePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
(sender as GifImage).Initialize();
}
public void StartAnimation()
{
if (!_isInitialized)
this.Initialize();
BeginAnimation(FrameIndexProperty, _animation);
}
public void StopAnimation()
{
BeginAnimation(FrameIndexProperty, null);
}
}
internal enum LogType
{
FileOnly,
FileAndConsole,
ConsoleOnly
};
internal static class LogFile
{
private static StreamWriter w = null;
private static object lockobject = new object();
#if PREVIEW
private static string LogAction = null;
private static StringBuilder LogBuilder;
#endif
static LogFile()
{
try
{
if (!Directory.Exists(Environment.ExpandEnvironmentVariables("%ALLUSERSPROFILE%\\WPInternals")))
Directory.CreateDirectory(Environment.ExpandEnvironmentVariables("%ALLUSERSPROFILE%\\WPInternals"));
w = File.AppendText(Environment.ExpandEnvironmentVariables("%ALLUSERSPROFILE%\\WPInternals\\WPInternals.log"));
}
catch { }
}
public static void Log(string logMessage, LogType Type = LogType.FileOnly)
{
if (w == null) return;
lock (lockobject)
{
if ((Type == LogType.FileOnly) || (Type == LogType.FileAndConsole))
{
DateTime Now = DateTime.Now;
string Text = Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + ": " + logMessage;
w.WriteLine(Text);
w.Flush();
#if PREVIEW
if (LogAction != null)
LogBuilder.AppendLine(Text);
#endif
}
if ((CommandLine.IsConsoleVisible) && ((Type == LogType.ConsoleOnly) || (Type == LogType.FileAndConsole)))
Console.WriteLine(logMessage);
}
}
public static void LogException(Exception Ex, LogType Type = LogType.FileAndConsole, string AdditionalInfo = null)
{
string Indent = "";
Exception CurrentEx = Ex;
while (CurrentEx != null)
{
Log(Indent + "Error: " + RemoveBadChars(CurrentEx.Message).Replace("of type '.' ", "") + (AdditionalInfo == null ? "" : " - " + AdditionalInfo), Type);
AdditionalInfo = null;
if (CurrentEx is WPinternalsException)
Log(Indent + ((WPinternalsException)CurrentEx).SubMessage, Type);
#if DEBUG
if (CurrentEx.StackTrace != null)
Log(Indent + CurrentEx.StackTrace, LogType.FileOnly);
#endif
Indent += " ";
CurrentEx = CurrentEx.InnerException;
}
}
private static string RemoveBadChars(string Text)
{
return System.Text.RegularExpressions.Regex.Replace(Text, @"[^\u0020-\u007E]+", string.Empty);
}
public static void DumpLog(StreamReader r)
{
string line;
while ((line = r.ReadLine()) != null)
{
Console.WriteLine(line);
}
}
public static void LogApplicationVersion()
{
Log("Windows Phone Internals version " +
Assembly.GetExecutingAssembly().GetName().Version.Major.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Minor.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Build.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Revision.ToString(), LogType.FileAndConsole);
Log("Copyright Heathcliff74 / wpinternals.net", LogType.FileAndConsole);
}
internal static void BeginAction(string Action)
{
#if PREVIEW
if (LogAction == null)
{
LogAction = Action;
LogBuilder = new StringBuilder();
LogBuilder.AppendLine("Windows Phone Internals version " +
Assembly.GetExecutingAssembly().GetName().Version.Major.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Minor.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Build.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Revision.ToString());
LogBuilder.AppendLine("Copyright Heathcliff74 / wpinternals.net");
LogBuilder.AppendLine("Action: " + Action);
if (App.Config.RegistrationName != null)
LogBuilder.AppendLine("Name: " + App.Config.RegistrationName);
if (App.Config.RegistrationEmail != null)
LogBuilder.AppendLine("Mail: " + App.Config.RegistrationEmail);
if (App.Config.RegistrationSkypeID != null)
LogBuilder.AppendLine("Skype: " + App.Config.RegistrationSkypeID);
if (App.Config.RegistrationTelegramID != null)
LogBuilder.AppendLine("Telegram: " + App.Config.RegistrationTelegramID);
if (Environment.MachineName != null)
LogBuilder.AppendLine("Machine: " + Environment.MachineName);
}
#endif
}
internal static void EndAction()
{
EndAction(null);
}
internal static void EndAction(string Action)
{
#if PREVIEW
if ((LogAction != null) && ((Action == null) || (LogAction == Action)))
{
Action = LogAction;
LogAction = null;
string FileName = "";
if (App.Config.RegistrationName != null)
FileName += App.Config.RegistrationName + " - ";
FileName += DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture) + " - " + Action + " - " +
Assembly.GetExecutingAssembly().GetName().Version.Major.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Minor.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Build.ToString() + "." +
Assembly.GetExecutingAssembly().GetName().Version.Revision.ToString() + ".log";
// Normalize filename
try
{
FileName = System.Text.Encoding.ASCII.GetString(System.Text.Encoding.GetEncoding("ISO-8859-8").GetBytes(FileName));
}
catch { }
FileName = FileName.Replace("?", "");
if (Action.ToLower() == "registration")
Uploader.Upload(FileName, LogBuilder.ToString());
else
{
try
{
Uploader.Upload(FileName, LogBuilder.ToString());
}
catch { }
}
}
#endif
}
}
public static class Converter
{
public static string ConvertHexToString(byte[] Bytes, string Separator)
{
StringBuilder s = new StringBuilder(1000);
for (int i = Bytes.GetLowerBound(0); i <= Bytes.GetUpperBound(0); i++)
{
if (i != Bytes.GetLowerBound(0))
s.Append(Separator);
s.Append(Bytes[i].ToString("X2"));
}
return s.ToString();
}
public static byte[] ConvertStringToHex(string HexString)
{
if (HexString.Length % 2 == 1)
throw new Exception("The binary key cannot have an odd number of digits");
byte[] arr = new byte[HexString.Length >> 1];
for (int i = 0; i < (HexString.Length >> 1); ++i)
{
arr[i] = (byte)((GetHexVal(HexString[i << 1]) << 4) + (GetHexVal(HexString[(i << 1) + 1])));
}
return arr;
}
public static int GetHexVal(char hex)
{
int val = (int)hex;
//For uppercase A-F letters:
//return val - (val < 58 ? 48 : 55);
//For lowercase a-f letters:
//return val - (val < 58 ? 48 : 87);
//Or the two combined, but a bit slower:
return val - (val < 58 ? 48 : (val < 97 ? 55 : 87));
}
}
// This class was found online.
// Original author is probably: John Melville
// https://social.msdn.microsoft.com/Forums/en-US/163ef755-ff7b-4ea5-b226-bbe8ef5f4796/is-there-a-pattern-for-calling-an-async-method-synchronously?forum=async
public static class AsyncHelpers
{
/// <summary>
/// Execute's an async Task<T> method which has a void return value synchronously
/// </summary>
/// <param name="task">Task<T> method to execute</param>
public static void RunSync(Func<Task> task)
{
var oldContext = SynchronizationContext.Current;
var synch = new ExclusiveSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(synch);
synch.Post(async _ =>
{
try
{
await task();
}
catch (Exception e)
{
synch.InnerException = e;
throw;
}
finally
{
synch.EndMessageLoop();
}
}, null);
synch.BeginMessageLoop();
SynchronizationContext.SetSynchronizationContext(oldContext);
}
/// <summary>
/// Execute's an async Task<T> method which has a T return type synchronously
/// </summary>
/// <typeparam name="T">Return Type</typeparam>
/// <param name="task">Task<T> method to execute</param>
/// <returns></returns>
public static T RunSync<T>(Func<Task<T>> task)
{
var oldContext = SynchronizationContext.Current;
var synch = new ExclusiveSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(synch);
T ret = default(T);
synch.Post(async _ =>
{
try
{
ret = await task();
}
catch (Exception e)
{
synch.InnerException = e;
throw;
}
finally
{
synch.EndMessageLoop();
}
}, null);
synch.BeginMessageLoop();
SynchronizationContext.SetSynchronizationContext(oldContext);
return ret;
}
private class ExclusiveSynchronizationContext : SynchronizationContext
{
private bool done;
public Exception InnerException { get; set; }
readonly AutoResetEvent workItemsWaiting = new AutoResetEvent(false);
readonly Queue<Tuple<SendOrPostCallback, object>> items =
new Queue<Tuple<SendOrPostCallback, object>>();
public override void Send(SendOrPostCallback d, object state)
{
throw new NotSupportedException("We cannot send to our same thread");
}
public override void Post(SendOrPostCallback d, object state)
{
lock (items)
{
items.Enqueue(Tuple.Create(d, state));
}
workItemsWaiting.Set();
}
public void EndMessageLoop()
{
Post(_ => done = true, null);
}
public void BeginMessageLoop()
{
while (!done)
{
Tuple<SendOrPostCallback, object> task = null;
lock (items)
{
if (items.Count > 0)
{
task = items.Dequeue();
}
}
if (task != null)
{
task.Item1(task.Item2);
if (InnerException != null) // the method threw an exeption
{
throw new AggregateException("AsyncHelpers.Run method threw an exception.", InnerException);
}
}
else
{
workItemsWaiting.WaitOne();
}
}
}
public override SynchronizationContext CreateCopy()
{
return this;
}
}
}
// This class is taken from the Prism library by Microsoft Patterns & Practices
// License: http://compositewpf.codeplex.com/license
internal static class WeakEventHandlerManager
{
public static void AddWeakReferenceHandler(ref List<WeakReference> handlers, EventHandler handler, int defaultListSize)
{
if (handlers == null)
{
handlers = (defaultListSize > 0) ? new List<WeakReference>(defaultListSize) : new List<WeakReference>();
}
handlers.Add(new WeakReference(handler));
}
private static void CallHandler(object sender, EventHandler eventHandler)
{
DispatcherProxy proxy = DispatcherProxy.CreateDispatcher();
if (eventHandler != null)
{
if ((proxy != null) && !proxy.CheckAccess())
{
proxy.BeginInvoke(new Action<object, EventHandler>(WeakEventHandlerManager.CallHandler), new object[] { sender, eventHandler });
}
else
{
eventHandler(sender, EventArgs.Empty);
}
}
}
public static void CallWeakReferenceHandlers(object sender, List<WeakReference> handlers)
{
if (handlers != null)
{
EventHandler[] callees = new EventHandler[handlers.Count];
int count = 0;
count = CleanupOldHandlers(handlers, callees, count);
for (int i = 0; i < count; i++)
{
CallHandler(sender, callees[i]);
}
}
}
private static int CleanupOldHandlers(List<WeakReference> handlers, EventHandler[] callees, int count)
{
for (int i = handlers.Count - 1; i >= 0; i--)
{
WeakReference reference = handlers[i];
EventHandler target = reference.Target as EventHandler;
if (target == null)
{
handlers.RemoveAt(i);
}
else
{
callees[count] = target;
count++;
}
}
return count;
}
public static void RemoveWeakReferenceHandler(List<WeakReference> handlers, EventHandler handler)
{
if (handlers != null)
{
for (int i = handlers.Count - 1; i >= 0; i--)
{
WeakReference reference = handlers[i];
EventHandler target = reference.Target as EventHandler;
if ((target == null) || (target == handler))
{
handlers.RemoveAt(i);
}
}
}
}
private class DispatcherProxy
{
private Dispatcher innerDispatcher;
private DispatcherProxy(Dispatcher dispatcher)
{
this.innerDispatcher = dispatcher;
}
public DispatcherOperation BeginInvoke(Delegate method, params object[] args)
{
return this.innerDispatcher.BeginInvoke(method, DispatcherPriority.Normal, args);
}
public bool CheckAccess()
{
return this.innerDispatcher.CheckAccess();
}
public static WeakEventHandlerManager.DispatcherProxy CreateDispatcher()
{
if (Application.Current == null)
{
return null;
}
return new WeakEventHandlerManager.DispatcherProxy(Application.Current.Dispatcher);
}
}
}
// This interface is taken from the Prism library by Microsoft Patterns & Practices
// License: http://compositewpf.codeplex.com/license
public interface IActiveAware
{
/// <summary>
/// Gets or sets a value indicating whether the object is active.
/// </summary>
/// <value><see langword="true" /> if the object is active; otherwise <see langword="false" />.</value>
bool IsActive { get; set; }
/// <summary>
/// Notifies that the value for <see cref="IsActive"/> property has changed.
/// </summary>
event EventHandler IsActiveChanged;
}
// This class is taken from the Prism library by Microsoft Patterns & Practices
// License: http://compositewpf.codeplex.com/license
public abstract class DelegateCommandBase : ICommand, IActiveAware
{
private List<WeakReference> _canExecuteChangedHandlers;
private bool _isActive;
private readonly Func<object, bool> canExecuteMethod;
private readonly Action<object> executeMethod;
public event EventHandler CanExecuteChanged
{
add
{
WeakEventHandlerManager.AddWeakReferenceHandler(ref this._canExecuteChangedHandlers, value, 2);
}
remove
{
WeakEventHandlerManager.RemoveWeakReferenceHandler(this._canExecuteChangedHandlers, value);
}
}
public event EventHandler IsActiveChanged;
protected DelegateCommandBase(Action<object> executeMethod, Func<object, bool> canExecuteMethod)
{
if ((executeMethod == null) || (canExecuteMethod == null))
{
throw new ArgumentNullException("executeMethod", "Delegate Command Delegates Cannot Be Null");
}
this.executeMethod = executeMethod;
this.canExecuteMethod = canExecuteMethod;
}
protected bool CanExecute(object parameter)
{
if (this.canExecuteMethod != null)
{
return this.canExecuteMethod(parameter);
}