mcs/class/System.Windows.Forms/System.Windows.Forms/Application.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004 - 2006 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Peter Bartok    pbartok@novell.com
  24 //      Daniel Nauck    (dna(at)mono-project(dot)de)
  25 //
  26
  27 // COMPLETE
  28
  29 #undef DebugRunLoop
  30
  31 using Microsoft.Win32;
  32 using System;
  33 using System.Drawing;
  34 using System.ComponentModel;
  35 using System.Collections;
  36 using System.Diagnostics;
  37 using System.Globalization;
  38 using System.IO;
  39 using System.Reflection;
  40 using System.Runtime.InteropServices;
  41 using System.Threading;
  42 using System.Text;
  43 using System.Windows.Forms.VisualStyles;
  44
  45 namespace System.Windows.Forms
  46 {
  47         public sealed class Application
  48         {
  49                 internal class MWFThread
  50                 {
  51                         #region Fields
  52
  53                         private ApplicationContext context;
  54                         private bool messageloop_started;
  55                         private bool handling_exception;
  56                         private int thread_id;
  57
  58                         private static readonly Hashtable threads = new Hashtable();
  59
  60                         #endregion      // Fields
  61
  62                         #region Constructors
  63
  64                         private MWFThread()
  65                         {
  66                         }
  67
  68                         #endregion      // Constructors
  69
  70                         #region Properties
  71
  72                         public ApplicationContext Context {
  73                                 get { return context; }
  74                                 set { context = value; }
  75                         }
  76
  77                         public bool MessageLoop {
  78                                 get { return messageloop_started; }
  79                                 set { messageloop_started = value; }
  80                         }
  81
  82                         public bool HandlingException {
  83                                 get { return handling_exception; }
  84                                 set { handling_exception = value; }
  85                         }
  86
  87                         public static int LoopCount {
  88                                 get {
  89                                         lock (threads) {
  90                                                 int loops = 0;
  91
  92                                                 foreach (MWFThread thread in threads.Values) {
  93                                                         if (thread.messageloop_started)
  94                                                                 loops++;
  95                                                 }
  96
  97                                                 return loops;
  98                                         }
  99                                 }
 100                         }
 101
 102                         public static MWFThread Current {
 103                                 get {
 104                                         MWFThread thread = null;
 105
 106                                         lock (threads) {
 107                                                 thread = (MWFThread) threads [Thread.CurrentThread.GetHashCode ()];
 108                                                 if (thread == null) {
 109                                                         thread = new MWFThread();
 110                                                         thread.thread_id = Thread.CurrentThread.GetHashCode ();
 111                                                         threads [thread.thread_id] = thread;
 112                                                 }
 113                                         }
 114
 115                                         return thread;
 116                                 }
 117                         }
 118
 119                         #endregion      // Properties
 120
 121                         #region Methods
 122
 123                         public void Exit ()
 124                         {
 125                                 if (context != null)
 126                                         context.ExitThread();
 127                                 context = null;
 128
 129                                 if (Application.ThreadExit != null)
 130                                         Application.ThreadExit(null, EventArgs.Empty);
 131
 132                                 if (LoopCount == 0) {
 133                                         if (Application.ApplicationExit != null)
 134                                                 Application.ApplicationExit (null, EventArgs.Empty);
 135                                 }
 136
 137                                 ((MWFThread) threads [thread_id]).MessageLoop = false;
 138                         }
 139
 140                         #endregion      // Methods
 141                 }
 142
 143                 private static bool browser_embedded;
 144                 private static InputLanguage input_language = InputLanguage.CurrentInputLanguage;
 145                 private static string safe_caption_format = "{1} - {0} - {2}";
 146                 private static readonly ArrayList message_filters = new ArrayList();
 147                 private static readonly FormCollection forms = new FormCollection ();
 148
 149                 private static bool use_wait_cursor;
 150                 private static ToolStrip keyboard_capture;
 151                 private static VisualStyleState visual_style_state = VisualStyleState.ClientAndNonClientAreasEnabled;
 152                 static bool visual_styles_enabled;
 153
 154                 private Application ()
 155                 {
 156                         browser_embedded = false;
 157                 }
 158
 159                 static Application ()
 160                 {
 161                         // Attempt to load UIA support for winforms
 162                         // UIA support requires .NET 2.0
 163                         InitializeUIAutomation ();
 164                 }
 165
 166                 #region Private Methods
 167
 168                 private static void InitializeUIAutomation ()
 169                 {
 170                         // Initialize the UIAutomationWinforms Global class,
 171                         // which create some listeners which subscribe to internal
 172                         // MWF events so that it can provide a11y support for MWF
 173                         const string UIA_WINFORMS_ASSEMBLY =
 174                           "UIAutomationWinforms, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f4ceacb585d99812";
 175                         MethodInfo init_method;
 176                         Assembly mwf_providers = null;
 177                         try {
 178                                 mwf_providers = Assembly.Load (UIA_WINFORMS_ASSEMBLY);
 179                         } catch { }
 180
 181                         if (mwf_providers == null)
 182                                 return;
 183
 184                         const string UIA_WINFORMS_TYPE     = "Mono.UIAutomation.Winforms.Global";
 185                         const string UIA_WINFORMS_METHOD   = "Initialize";
 186                         try {
 187                                 Type global_type = mwf_providers.GetType (UIA_WINFORMS_TYPE, false);
 188                                 if (global_type != null) {
 189                                         init_method = global_type.GetMethod (UIA_WINFORMS_METHOD,
 190                                                                              BindingFlags.Static |
 191                                                                              BindingFlags.Public);
 192                                         if (init_method != null)
 193                                                 init_method.Invoke (null, new object [] {});
 194                                         else
 195                                                 throw new Exception (String.Format ("Method {0} not found in type {1}.",
 196                                                                                     UIA_WINFORMS_METHOD, UIA_WINFORMS_TYPE));
 197                                 }
 198                                 else
 199                                         throw new Exception (String.Format ("Type {0} not found in assembly {1}.",
 200                                                                             UIA_WINFORMS_TYPE, UIA_WINFORMS_ASSEMBLY));
 201                         } catch (Exception ex) {
 202                                 Console.Error.WriteLine ("Error setting up UIA: " + ex);
 203                         }
 204                 }
 205
 206                 internal static void CloseForms (Thread thread)
 207                 {
 208                         #if DebugRunLoop
 209                                 Console.WriteLine("   CloseForms({0}) called", thread);
 210                         #endif
 211
 212                         ArrayList forms_to_close = new ArrayList ();
 213
 214                         lock (forms) {
 215                                 foreach (Form f in forms) {
 216                                         if (thread == null || thread == f.creator_thread)
 217                                                 forms_to_close.Add (f);
 218                                 }
 219
 220                                 foreach (Form f in forms_to_close) {
 221                                         #if DebugRunLoop
 222                                                 Console.WriteLine("      Closing form {0}", f);
 223                                         #endif
 224                                         f.Dispose ();
 225                                 }
 226                         }
 227                 }
 228
 229                 #endregion      // Private methods
 230
 231                 #region Public Static Properties
 232
 233                 public static bool AllowQuit {
 234                         get {
 235                                 return !browser_embedded;
 236                         }
 237                 }
 238
 239                 public static string CommonAppDataPath {
 240                         get {
 241                                 return CreateDataPath (Environment.GetFolderPath (Environment.SpecialFolder.CommonApplicationData));
 242                         }
 243                 }
 244
 245                 public static RegistryKey CommonAppDataRegistry {
 246                         get {
 247                                 string key = string.Format ("Software\\{0}\\{1}\\{2}", CompanyName, ProductName, ProductVersion);
 248
 249                                 return Registry.LocalMachine.CreateSubKey (key);
 250                         }
 251                 }
 252
 253                 public static string CompanyName {
 254                         get {
 255                                 string company = string.Empty;
 256
 257                                 Assembly assembly = Assembly.GetEntryAssembly ();
 258
 259                                 if (assembly == null)
 260                                         assembly = Assembly.GetCallingAssembly ();
 261
 262                                 AssemblyCompanyAttribute[] attrs = (AssemblyCompanyAttribute[])
 263                                         assembly.GetCustomAttributes (typeof(AssemblyCompanyAttribute), true);
 264                                 if (attrs != null && attrs.Length > 0)
 265                                         company = attrs [0].Company;
 266
 267                                 // If there is no [AssemblyCompany], return the outermost namespace
 268                                 // on Main ()
 269                                 if (company == null || company.Length == 0)
 270                                         if (assembly.EntryPoint != null) {
 271                                                 company = assembly.EntryPoint.DeclaringType.Namespace;
 272
 273                                                 if (company != null) {
 274                                                         int firstDot = company.IndexOf ('.');
 275                                                         if (firstDot >= 0)
 276                                                                 company = company.Substring (0, firstDot);
 277                                                 }
 278                                         }
 279
 280                                 // If that doesn't work, return the name of class containing Main ()
 281                                 if (company == null || company.Length == 0)
 282                                         if (assembly.EntryPoint != null)
 283                                                 company = assembly.EntryPoint.DeclaringType.FullName;
 284
 285                                 return company;
 286                         }
 287                 }
 288
 289                 public static CultureInfo CurrentCulture {
 290                         get {
 291                                 return Thread.CurrentThread.CurrentUICulture;
 292                         }
 293                         set {
 294                                 Thread.CurrentThread.CurrentUICulture = value;
 295                         }
 296                 }
 297
 298                 public static InputLanguage CurrentInputLanguage {
 299                         get {
 300                                 return input_language;
 301                         }
 302                         set {
 303                                 input_language=value;
 304                         }
 305                 }
 306
 307                 public static string ExecutablePath {
 308                         get {
 309                                 return Path.GetFullPath (Environment.GetCommandLineArgs ()[0]);
 310                         }
 311                 }
 312
 313                 public static string LocalUserAppDataPath {
 314                         get {
 315                                 return CreateDataPath (Environment.GetFolderPath (Environment.SpecialFolder.LocalApplicationData));
 316                         }
 317                 }
 318
 319                 public static bool MessageLoop {
 320                         get {
 321                                 return MWFThread.Current.MessageLoop;
 322                         }
 323                 }
 324
 325                 public static string ProductName {
 326                         get {
 327                                 string name = string.Empty;
 328
 329                                 Assembly assembly = Assembly.GetEntryAssembly ();
 330
 331                                 if (assembly == null)
 332                                         assembly = Assembly.GetCallingAssembly ();
 333
 334                                 AssemblyProductAttribute[] attrs = (AssemblyProductAttribute[])
 335                                         assembly.GetCustomAttributes (typeof(AssemblyProductAttribute), true);
 336
 337                                 if (attrs != null && attrs.Length > 0)
 338                                         name = attrs [0].Product;
 339
 340                                 // If there is no [AssemblyProduct], .NET returns the name of
 341                                 // the innermost namespace and if that fails, resorts to the
 342                                 // name of the class containing Main ()
 343                                 if (name == null || name.Length == 0)
 344                                         if (assembly.EntryPoint != null) {
 345                                                 name = assembly.EntryPoint.DeclaringType.Namespace;
 346
 347                                                 if (name != null) {
 348                                                         int lastDot = name.LastIndexOf ('.');
 349                                                         if (lastDot >= 0 && lastDot < name.Length - 1)
 350                                                                 name = name.Substring (lastDot + 1);
 351                                                 }
 352
 353                                                 if (name == null || name.Length == 0)
 354                                                         name = assembly.EntryPoint.DeclaringType.FullName;
 355                                         }
 356
 357                                 return name;
 358                         }
 359                 }
 360
 361                 public static string ProductVersion {
 362                         get {
 363                                 String version = string.Empty;
 364
 365                                 Assembly assembly = Assembly.GetEntryAssembly ();
 366
 367                                 if (assembly == null)
 368                                         assembly = Assembly.GetCallingAssembly ();
 369
 370                                 AssemblyInformationalVersionAttribute infoVersion =
 371                                         Attribute.GetCustomAttribute (assembly,
 372                                         typeof (AssemblyInformationalVersionAttribute))
 373                                         as AssemblyInformationalVersionAttribute;
 374
 375                                 if (infoVersion != null)
 376                                         version = infoVersion.InformationalVersion;
 377
 378                                 // If [AssemblyFileVersion] is present it is used
 379                                 // before resorting to assembly version
 380                                 if (version == null || version.Length == 0) {
 381                                         AssemblyFileVersionAttribute fileVersion =
 382                                                 Attribute.GetCustomAttribute (assembly,
 383                                                 typeof (AssemblyFileVersionAttribute))
 384                                                 as AssemblyFileVersionAttribute;
 385                                         if (fileVersion != null)
 386                                                 version = fileVersion.Version;
 387                                 }
 388
 389                                 // If neither [AssemblyInformationalVersionAttribute]
 390                                 // nor [AssemblyFileVersion] are present, then use
 391                                 // the assembly version
 392                                 if (version == null || version.Length == 0)
 393                                         version = assembly.GetName ().Version.ToString ();
 394
 395                                 return version;
 396                         }
 397                 }
 398
 399                 public static string SafeTopLevelCaptionFormat {
 400                         get {
 401                                 return safe_caption_format;
 402                         }
 403                         set {
 404                                 safe_caption_format = value;
 405                         }
 406                 }
 407
 408                 public static string StartupPath {
 409                         get {
 410                                 return Path.GetDirectoryName (Application.ExecutablePath);
 411                         }
 412                 }
 413
 414                 public static string UserAppDataPath {
 415                         get {
 416                                 return CreateDataPath (Environment.GetFolderPath (Environment.SpecialFolder.ApplicationData));
 417                         }
 418                 }
 419
 420                 public static RegistryKey UserAppDataRegistry {
 421                         get {
 422                                 string key = string.Format ("Software\\{0}\\{1}\\{2}", CompanyName, ProductName, ProductVersion);
 423
 424                                 return Registry.CurrentUser.CreateSubKey (key);
 425                         }
 426                 }
 427
 428                 public static bool UseWaitCursor {
 429                         get {
 430                                 return use_wait_cursor;
 431                         }
 432                         set {
 433                                 use_wait_cursor = value;
 434                                 if (use_wait_cursor) {
 435                                         foreach (Form form in OpenForms) {
 436                                                 form.Cursor = Cursors.WaitCursor;
 437                                         }
 438                                 }
 439                         }
 440                 }
 441
 442                 public static bool RenderWithVisualStyles {
 443                         get {
 444                                 if (VisualStyleInformation.IsSupportedByOS) {
 445                                         if (!VisualStyleInformation.IsEnabledByUser)
 446                                                 return false;
 447                                         if (!XplatUI.ThemesEnabled)
 448                                                 return false;
 449                                         if (Application.VisualStyleState == VisualStyleState.ClientAndNonClientAreasEnabled)
 450                                                 return true;
 451                                         if (Application.VisualStyleState == VisualStyleState.ClientAreaEnabled)
 452                                                 return true;
 453                                 }
 454                                 return false;
 455                         }
 456                 }
 457
 458                 public static VisualStyleState VisualStyleState {
 459                         get { return Application.visual_style_state; }
 460                         set { Application.visual_style_state = value; }
 461                 }
 462
 463                 #endregion
 464
 465                 #region Public Static Methods
 466
 467                 public static void AddMessageFilter (IMessageFilter value)
 468                 {
 469                         lock (message_filters) {
 470                                 message_filters.Add (value);
 471                         }
 472                 }
 473
 474                 internal static void AddKeyFilter (IKeyFilter value)
 475                 {
 476                         XplatUI.AddKeyFilter (value);
 477                 }
 478
 479                 public static void DoEvents ()
 480                 {
 481                         XplatUI.DoEvents ();
 482                 }
 483
 484                 public static void EnableVisualStyles ()
 485                 {
 486                         visual_styles_enabled = true;
 487                         XplatUI.EnableThemes ();
 488                 }
 489
 490                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 491                 public static bool FilterMessage (ref Message message)
 492                 {
 493                         lock (message_filters) {
 494                                 for (int i = 0; i < message_filters.Count; i++) {
 495                                         IMessageFilter filter = (IMessageFilter) message_filters[i];
 496                                         if (filter.PreFilterMessage (ref message))
 497                                                 return true;
 498                                 }
 499                         }
 500                         return false;
 501                 }
 502
 503                 //
 504                 // If true, it uses GDI+, performance reasons were quoted
 505                 //
 506                 static internal bool use_compatible_text_rendering = true;
 507
 508                 public static void SetCompatibleTextRenderingDefault (bool defaultValue)
 509                 {
 510                         use_compatible_text_rendering = defaultValue;
 511                 }
 512
 513                 public static FormCollection OpenForms {
 514                         get {
 515                                 return forms;
 516                         }
 517                 }
 518
 519                 [MonoNotSupported ("Only applies when Winforms is being hosted by an unmanaged app.")]
 520                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 521                 public static void RegisterMessageLoop (MessageLoopCallback callback)
 522                 {
 523                 }
 524
 525                 [MonoNotSupported ("Empty stub.")]
 526                 public static bool SetSuspendState (PowerState state, bool force, bool disableWakeEvent)
 527                 {
 528                         return false;
 529                 }
 530
 531                 [MonoNotSupported ("Empty stub.")]
 532                 public static void SetUnhandledExceptionMode (UnhandledExceptionMode mode)
 533                 {
 534                         //FIXME: a stub to fill
 535                 }
 536
 537                 [MonoNotSupported ("Empty stub.")]
 538                 public static void SetUnhandledExceptionMode (UnhandledExceptionMode mode, bool threadScope)
 539                 {
 540                         //FIXME: a stub to fill
 541                 }
 542
 543                 [MonoNotSupported ("Only applies when Winforms is being hosted by an unmanaged app.")]
 544                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 545                 public static void UnregisterMessageLoop ()
 546                 {
 547                 }
 548
 549                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 550                 public static void RaiseIdle (EventArgs e)
 551                 {
 552                         XplatUI.RaiseIdle (e);
 553                 }
 554
 555                 public static void Restart ()
 556                 {
 557                         //FIXME: ClickOnce stuff using the Update or UpdateAsync methods.
 558                         //FIXME: SecurityPermission: Restart () requires IsUnrestricted permission.
 559
 560                         if (Assembly.GetEntryAssembly () == null)
 561                                 throw new NotSupportedException ("The method 'Restart' is not supported by this application type.");
 562
 563                         string mono_path = MonoToolsLocator.Mono;
 564
 565                         //Get command line arguments
 566                         StringBuilder argsBuilder = new StringBuilder ();
 567                         string[] args = Environment.GetCommandLineArgs ();
 568                         for (int i = 0; i < args.Length; i++)
 569                         {
 570                                 argsBuilder.Append (string.Format ("\"{0}\" ", args[i]));
 571                         }
 572                         string arguments = argsBuilder.ToString ();
 573                         ProcessStartInfo procInfo = Process.GetCurrentProcess ().StartInfo;
 574
 575                         if (mono_path == null) { //it is .NET on Windows
 576                                 procInfo.FileName = args[0];
 577                                 procInfo.Arguments = arguments.Remove (0, args[0].Length + 3); //1 space and 2 quotes
 578                         }
 579                         else {
 580                                 procInfo.Arguments = arguments;
 581                                 procInfo.FileName = mono_path;
 582                         }
 583
 584                         procInfo.WorkingDirectory = Environment.CurrentDirectory;
 585
 586                         Application.Exit ();
 587                         Process.Start (procInfo);
 588                 }
 589
 590                 public static void Exit ()
 591                 {
 592                         Exit (new CancelEventArgs ());
 593                 }
 594
 595                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 596                 public static void Exit (CancelEventArgs e)
 597                 {
 598                         ArrayList forms_to_close;
 599
 600                         lock (forms) {
 601                                 forms_to_close = new ArrayList (forms);
 602
 603                                 foreach (Form f in forms_to_close) {
 604                                         // Give each form a chance to cancel the Application.Exit
 605                                         e.Cancel = f.FireClosingEvents (CloseReason.ApplicationExitCall, false);
 606
 607                                         if (e.Cancel)
 608                                                 return;
 609
 610                                         f.suppress_closing_events = true;
 611                                         f.Close ();
 612                                         f.Dispose ();
 613                                 }
 614                         }
 615
 616                         XplatUI.PostQuitMessage (0);
 617                 }
 618
 619                 public static void ExitThread()
 620                 {
 621                         CloseForms(Thread.CurrentThread);
 622                         // this might not be right - need to investigate (somehow) if a WM_QUIT message is generated here
 623                         XplatUI.PostQuitMessage(0);
 624                 }
 625
 626                 public static ApartmentState OleRequired ()
 627                 {
 628                         //throw new NotImplementedException("OLE Not supported by this System.Windows.Forms implementation");
 629                         return ApartmentState.Unknown;
 630                 }
 631
 632                 public static void OnThreadException (Exception t)
 633                 {
 634                         if (MWFThread.Current.HandlingException) {
 635                                 /* we're already handling an exception and we got
 636                                    another one?  print it out and exit, this means
 637                                    we've got a runtime/SWF bug. */
 638                                 Console.WriteLine (t);
 639                                 // Don't use Application.Exit here, since it may cause a stack overflow
 640                                 // in certain cases. It's however hard to reproduce since it seems to
 641                                 // be depending on when the GC kicks in.
 642                                 Environment.Exit(1);
 643                         }
 644
 645                         try {
 646                                 MWFThread.Current.HandlingException = true;
 647
 648                                 if (Application.ThreadException != null) {
 649                                         Application.ThreadException(null, new ThreadExceptionEventArgs(t));
 650                                         return;
 651                                 }
 652
 653                                 if (SystemInformation.UserInteractive) {
 654                                         Form form = new ThreadExceptionDialog (t);
 655                                         form.ShowDialog ();
 656                                 } else {
 657                                         Console.WriteLine (t.ToString ());
 658                                         Application.Exit ();
 659                                 }
 660                         } finally {
 661                                 MWFThread.Current.HandlingException = false;
 662                         }
 663                 }
 664
 665                 public static void RemoveMessageFilter (IMessageFilter value)
 666                 {
 667                         lock (message_filters) {
 668                                 message_filters.Remove (value);
 669                         }
 670                 }
 671
 672                 public static void Run ()
 673                 {
 674                         Run (new ApplicationContext ());
 675                 }
 676
 677                 public static void Run (Form mainForm)
 678                 {
 679                         Run (new ApplicationContext (mainForm));
 680                 }
 681
 682                 internal static void FirePreRun ()
 683                 {
 684                         EventHandler handler = PreRun;
 685                         if (handler != null)
 686                                 handler (null, EventArgs.Empty);
 687                 }
 688
 689                 public static void Run (ApplicationContext context)
 690                 {
 691                         // If a sync context hasn't been created by now, create
 692                         // a default one
 693                         if (SynchronizationContext.Current == null)
 694                                 SynchronizationContext.SetSynchronizationContext (new SynchronizationContext ());
 695
 696                         RunLoop (false, context);
 697
 698                         // Reset the sync context back to the default
 699                         if (SynchronizationContext.Current is WindowsFormsSynchronizationContext)
 700                                 WindowsFormsSynchronizationContext.Uninstall ();
 701                 }
 702
 703                 private static void DisableFormsForModalLoop (Queue toplevels, ApplicationContext context)
 704                 {
 705                         Form f;
 706
 707                         lock (forms) {
 708                                 IEnumerator control = forms.GetEnumerator ();
 709
 710                                 while (control.MoveNext ()) {
 711                                         f = (Form)control.Current;
 712
 713                                         // Don't disable the main form.
 714                                         if (f == context.MainForm) {
 715                                                 continue;
 716                                         }
 717
 718                                         // Don't disable any children of the main form.
 719                                         // These do not have to be MDI children.
 720                                         Control current = f;
 721                                         bool is_child_of_main = false; ;
 722
 723                                         do {
 724                                                 if (current.Parent == context.MainForm) {
 725                                                         is_child_of_main = true;
 726                                                         break;
 727                                                 }
 728                                                 current = current.Parent;
 729                                         } while (current != null);
 730
 731                                         if (is_child_of_main)
 732                                                 continue;
 733
 734                                         // Disable the rest
 735                                         if (f.IsHandleCreated && XplatUI.IsEnabled (f.Handle)) {
 736 #if DebugRunLoop
 737                                                 Console.WriteLine("      Disabling form {0}", f);
 738 #endif
 739                                                 XplatUI.EnableWindow (f.Handle, false);
 740                                                 toplevels.Enqueue (f);
 741                                         }
 742                                 }
 743                         }
 744
 745                 }
 746
 747
 748                 private static void EnableFormsForModalLoop (Queue toplevels, ApplicationContext context)
 749                 {
 750                         while (toplevels.Count > 0) {
 751 #if DebugRunLoop
 752                                 Console.WriteLine("      Re-Enabling form form {0}", toplevels.Peek());
 753 #endif
 754                                 Form c = (Form) toplevels.Dequeue ();
 755                                 if (c.IsHandleCreated) {
 756                                         XplatUI.EnableWindow (c.window.Handle, true);
 757                                         context.MainForm = c;
 758                                 }
 759                         }
 760 #if DebugRunLoop
 761                         Console.WriteLine("   Done with the re-enable");
 762 #endif
 763                 }
 764
 765                 internal static void RunLoop (bool Modal, ApplicationContext context)
 766                 {
 767                         Queue           toplevels;
 768                         MSG             msg;
 769                         Object          queue_id;
 770                         MWFThread       thread;
 771                         ApplicationContext previous_thread_context;
 772
 773                         thread = MWFThread.Current;
 774
 775                         /*
 776                          * There is a NotWorking test for this, but since we are using this method both for Form.ShowDialog as for ApplicationContexts we'll
 777                          * fail on nested ShowDialogs, so disable the check for the moment.
 778                          */
 779                         //if (thread.MessageLoop) {
 780                         //        throw new InvalidOperationException ("Starting a second message loop on a single thread is not a valid operation. Use Form.ShowDialog instead.");
 781                         //}
 782
 783                         msg = new MSG();
 784
 785                         if (context == null)
 786                                 context = new ApplicationContext();
 787
 788                         previous_thread_context = thread.Context;
 789                         thread.Context = context;
 790
 791                         if (context.MainForm != null) {
 792                                 context.MainForm.is_modal = Modal;
 793                                 context.MainForm.context = context;
 794                                 context.MainForm.closing = false;
 795                                 context.MainForm.Visible = true;        // Cannot use Show() or scaling gets confused by menus
 796                                 // XXX the above line can be used to close the form. another problem with our handling of Show/Activate.
 797                                 if (context.MainForm != null)
 798                                         context.MainForm.Activate();
 799                         }
 800
 801                         #if DebugRunLoop
 802                                 Console.WriteLine("Entering RunLoop(Modal={0}, Form={1})", Modal, context.MainForm != null ? context.MainForm.ToString() : "NULL");
 803                         #endif
 804
 805                         if (Modal) {
 806                                 toplevels = new Queue ();
 807                                 DisableFormsForModalLoop (toplevels, context);
 808
 809                                 // FIXME - need activate?
 810                                 /* make sure the MainForm is enabled */
 811                                 if (context.MainForm != null) {
 812                                         XplatUI.EnableWindow (context.MainForm.Handle, true);
 813                                         XplatUI.SetModal(context.MainForm.Handle, true);
 814                                 }
 815                         } else {
 816                                 toplevels = null;
 817                         }
 818
 819                         queue_id = XplatUI.StartLoop(Thread.CurrentThread);
 820                         thread.MessageLoop = true;
 821
 822                         bool quit = false;
 823
 824                         while (!quit && XplatUI.GetMessage(queue_id, ref msg, IntPtr.Zero, 0, 0)) {
 825                                 Message m = Message.Create(msg.hwnd, (int)msg.message, msg.wParam, msg.lParam);
 826
 827                                 if (Application.FilterMessage (ref m))
 828                                         continue;
 829
 830                                 switch((Msg)msg.message) {
 831                                 case Msg.WM_KEYDOWN:
 832                                 case Msg.WM_SYSKEYDOWN:
 833                                 case Msg.WM_CHAR:
 834                                 case Msg.WM_SYSCHAR:
 835                                 case Msg.WM_KEYUP:
 836                                 case Msg.WM_SYSKEYUP:
 837                                         Control c;
 838                                         c = Control.FromHandle(msg.hwnd);
 839
 840                                         // If we have a control with keyboard capture (usually a *Strip)
 841                                         // give it the message, and then drop the message
 842                                         if (keyboard_capture != null) {
 843                                                 // WM_SYSKEYUP does not make it into ProcessCmdKey, so do it here
 844                                                 if ((Msg)m.Msg == Msg.WM_SYSKEYDOWN)
 845                                                         if (m.WParam.ToInt32() == (int)Keys.Menu) {
 846                                                                 keyboard_capture.GetTopLevelToolStrip ().Dismiss (ToolStripDropDownCloseReason.Keyboard);
 847                                                                 continue;
 848                                                         }
 849
 850                                                 m.HWnd = keyboard_capture.Handle;
 851
 852                                                 switch (keyboard_capture.PreProcessControlMessageInternal (ref m)) {
 853                                                         case PreProcessControlState.MessageProcessed:
 854                                                                 continue;
 855                                                         case PreProcessControlState.MessageNeeded:
 856                                                         case PreProcessControlState.MessageNotNeeded:
 857                                                                 if (((m.Msg == (int)Msg.WM_KEYDOWN || m.Msg == (int)Msg.WM_CHAR) && !keyboard_capture.ProcessControlMnemonic ((char)m.WParam))) {
 858                                                                         if (c == null || !ControlOnToolStrip (c))
 859                                                                                 continue;
 860                                                                         else
 861                                                                                 m.HWnd = msg.hwnd;
 862                                                                 } else
 863                                                                         continue;
 864
 865                                                                 break;
 866                                                 }
 867                                         }
 868
 869                                         if (((c != null) && c.PreProcessControlMessageInternal (ref m) != PreProcessControlState.MessageProcessed) ||
 870                                                 (c == null)) {
 871                                                 goto default;
 872                                         }
 873                                         break;
 874
 875                                 case Msg.WM_LBUTTONDOWN:
 876                                 case Msg.WM_MBUTTONDOWN:
 877                                 case Msg.WM_RBUTTONDOWN:
 878                                         if (keyboard_capture != null) {
 879                                                 Control c2 = Control.FromHandle (msg.hwnd);
 880
 881                                                 // the target is not a winforms control (an embedded control, perhaps), so
 882                                                 // release everything
 883                                                 if (c2 == null) {
 884                                                         ToolStripManager.FireAppClicked ();
 885                                                         goto default;
 886                                                 }
 887
 888                                                 // If we clicked a ToolStrip, we have to make sure it isn't
 889                                                 // the one we are on, or any of its parents or children
 890                                                 // If we clicked off the dropped down menu, release everything
 891                                                 if (c2 is ToolStrip) {
 892                                                         if ((c2 as ToolStrip).GetTopLevelToolStrip () != keyboard_capture.GetTopLevelToolStrip ())
 893                                                                 ToolStripManager.FireAppClicked ();
 894                                                 } else {
 895                                                         if (c2.Parent != null)
 896                                                                 if (c2.Parent is ToolStripDropDownMenu)
 897                                                                         if ((c2.Parent as ToolStripDropDownMenu).GetTopLevelToolStrip () == keyboard_capture.GetTopLevelToolStrip ())
 898                                                                                 goto default;
 899                                                         if (c2.TopLevelControl == null)
 900                                                                 goto default;
 901
 902                                                         ToolStripManager.FireAppClicked ();
 903                                                 }
 904                                         }
 905
 906                                         goto default;
 907
 908                                 case Msg.WM_QUIT:
 909                                         quit = true; // make sure we exit
 910                                         break;
 911                                 default:
 912                                         XplatUI.TranslateMessage (ref msg);
 913                                         XplatUI.DispatchMessage (ref msg);
 914                                         break;
 915                                 }
 916
 917                                 // If our Form doesn't have a handle anymore, it means it was destroyed and we need to *wait* for WM_QUIT.
 918                                 if ((context.MainForm != null) && (!context.MainForm.IsHandleCreated))
 919                                         continue;
 920
 921                                 // Handle exit, Form might have received WM_CLOSE and set 'closing' in response.
 922                                 if ((context.MainForm != null) && (context.MainForm.closing || (Modal && !context.MainForm.Visible))) {
 923                                         if (!Modal) {
 924                                                 XplatUI.PostQuitMessage (0);
 925                                         } else {
 926                                                 break;
 927                                         }
 928                                 }
 929                         }
 930                         #if DebugRunLoop
 931                                 Console.WriteLine ("   RunLoop loop left");
 932                         #endif
 933
 934                         thread.MessageLoop = false;
 935                         XplatUI.EndLoop (Thread.CurrentThread);
 936
 937                         if (Modal) {
 938                                 Form old = context.MainForm;
 939
 940                                 context.MainForm = null;
 941
 942                                 EnableFormsForModalLoop (toplevels, context);
 943
 944                                 if (old != null && old.IsHandleCreated) {
 945                                         XplatUI.SetModal (old.Handle, false);
 946                                 }
 947                                 #if DebugRunLoop
 948                                         Console.WriteLine ("   Done with the SetModal");
 949                                 #endif
 950                                 old.RaiseCloseEvents (true, false);
 951                                 old.is_modal = false;
 952                         }
 953
 954                         #if DebugRunLoop
 955                                 Console.WriteLine ("Leaving RunLoop(Modal={0}, Form={1})", Modal, context.MainForm != null ? context.MainForm.ToString() : "NULL");
 956                         #endif
 957
 958                         if (context.MainForm != null) {
 959                                 context.MainForm.context = null;
 960                                 context.MainForm = null;
 961                         }
 962
 963                         thread.Context = previous_thread_context;
 964
 965                         if (!Modal)
 966                                 thread.Exit();
 967                 }
 968
 969                 #endregion      // Public Static Methods
 970
 971                 #region Events
 972
 973                 public static event EventHandler ApplicationExit;
 974
 975                 public static event EventHandler Idle {
 976                         add {
 977                                 XplatUI.Idle += value;
 978                         }
 979                         remove {
 980                                 XplatUI.Idle -= value;
 981                         }
 982                 }
 983
 984                 public static event EventHandler ThreadExit;
 985                 public static event ThreadExceptionEventHandler ThreadException;
 986
 987                 // These are used externally by the UIA framework
 988                 internal static event EventHandler FormAdded;
 989                 internal static event EventHandler PreRun;
 990
 991 #pragma warning disable 0067
 992                 [MonoTODO]
 993                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 994                 public static event EventHandler EnterThreadModal;
 995
 996                 [MonoTODO]
 997                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 998                 public static event EventHandler LeaveThreadModal;
 999 #pragma warning restore 0067
1000
1001                 #endregion      // Events
1002
1003                 #region Public Delegates
1004
1005                 [EditorBrowsable (EditorBrowsableState.Advanced)]
1006                 public delegate bool MessageLoopCallback ();
1007
1008                 #endregion
1009
1010                 #region Internal Properties
1011                 internal static ToolStrip KeyboardCapture {
1012                         get { return keyboard_capture; }
1013                         set { keyboard_capture = value; }
1014                 }
1015
1016                 internal static bool VisualStylesEnabled {
1017                         get { return visual_styles_enabled; }
1018                 }
1019                 #endregion
1020
1021                 #region Internal Methods
1022
1023                 internal static void AddForm (Form f)
1024                 {
1025                         lock (forms)
1026                                 forms.Add (f);
1027                         // Signal that a Form has been added to this
1028                         // Application. Used by UIA to detect new Forms that
1029                         // need a11y support. This event may be fired even if
1030                         // the form has already been added, so clients should
1031                         // account for that when handling this signal.
1032                         if (FormAdded != null)
1033                                 FormAdded (f, null);
1034                 }
1035
1036                 internal static void RemoveForm (Form f)
1037                 {
1038                         lock (forms)
1039                                 forms.Remove (f);
1040                 }
1041
1042                 private static bool ControlOnToolStrip (Control c)
1043                 {
1044                         Control p = c.Parent;
1045
1046                         while (p != null) {
1047                                 if (p is ToolStrip)
1048                                         return true;
1049
1050                                 p = p.Parent;
1051                         }
1052
1053                         return false;
1054                 }
1055
1056                 // Takes a starting path, appends company name, product name, and
1057                 // product version.  If the directory doesn't exist, create it
1058                 private static string CreateDataPath (string basePath)
1059                 {
1060                         string path;
1061
1062                         path = Path.Combine (basePath, CompanyName);
1063                         path = Path.Combine (path, ProductName);
1064                         path = Path.Combine (path, ProductVersion);
1065
1066                         if (!Directory.Exists (path))
1067                                 Directory.CreateDirectory (path);
1068
1069                         return path;
1070                 }
1071                 #endregion
1072         }
1073 }