controller/applications/ApplicationInput.cs

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 using System;
  34 using System.Collections.Generic;
  35 using System.Text;
  36 using System.Windows.Forms;
  37 using CecSharp;
  38 using LibCECTray.Properties;
  39
  40 namespace LibCECTray.controller.applications
  41 {
  42   /// <summary>
  43   /// The type of the action that is executed
  44   /// </summary>
  45   enum ActionType
  46   {
  47     Generic = 0,
  48     CloseControllerApplication = 1,
  49     StartApplication = 2,
  50     SendKey = 3
  51   }
  52
  53   /// <summary>
  54   /// Class that contains one or more actions that can be executed or sent to the application
  55   /// </summary>
  56   abstract class ApplicationAction
  57   {
  58     /// <summary>
  59     /// Constructor
  60     /// </summary>
  61     /// <param name="controller">The controller instance of the application that this action is targeting</param>
  62     /// <param name="type">The type of the action that is executed</param>
  63     protected ApplicationAction(ApplicationController controller, ActionType type)
  64     {
  65       Controller = controller;
  66       ActionType = type;
  67     }
  68
  69     /// <summary>
  70     /// The type of the action that is executed
  71     /// </summary>
  72     public ActionType ActionType { private set; get; }
  73
  74     /// <summary>
  75     /// Execute the action
  76     /// </summary>
  77     /// <param name="windowHandle">The window of the application that is targeted</param>
  78     /// <returns>True when executed, false otherwise</returns>
  79     public abstract bool Transmit(IntPtr windowHandle);
  80
  81     /// <summary>
  82     /// Serialisable string representation of this action
  83     /// </summary>
  84     /// <returns>The requested string</returns>
  85     public abstract string AsString();
  86
  87     /// <summary>
  88     /// String representation of this action in human readable form
  89     /// </summary>
  90     /// <returns>The requested string</returns>
  91     public abstract string AsFriendlyString();
  92
  93     /// <summary>
  94     /// Check whether this action is empty (not doing anything)
  95     /// </summary>
  96     /// <returns>True when empty, false otherwise</returns>
  97     public abstract bool Empty();
  98
  99     /// <summary>
 100     /// Checks whether the given action can be appended to this one.
 101     /// </summary>
 102     /// <param name="value">The action to check</param>
 103     /// <returns>True when it can be appended, false otherwise</returns>
 104     public abstract bool CanAppend(ApplicationAction value);
 105
 106     /// <summary>
 107     /// Append the given action to this action, and return the combined result
 108     /// </summary>
 109     /// <param name="value">The action to append to this one</param>
 110     /// <returns>The combined result</returns>
 111     public abstract ApplicationAction Append(ApplicationAction value);
 112
 113     /// <summary>
 114     /// Remove item at the given index from this action
 115     /// </summary>
 116     /// <param name="index">The index of the item to remove</param>
 117     /// <returns>True when removed, false otherwise</returns>
 118     public abstract ApplicationAction RemoveKey(int index);
 119
 120     /// <summary>
 121     /// The prefix to use for serialisation for this type
 122     /// </summary>
 123     protected string TypePrefix
 124     {
 125       get { return Enum.GetName(typeof(ActionType), ActionType); }
 126     }
 127
 128     /// <summary>
 129     /// Get the parameter value from a string representation of an action of this type
 130     /// </summary>
 131     /// <param name="value">The value to get the parameter from</param>
 132     /// <returns>The parameter</returns>
 133     protected string GetParameterFromString(string value)
 134     {
 135       var trimmedItem = value.Trim();
 136       if (!trimmedItem.StartsWith(TypePrefix + "(") || !trimmedItem.EndsWith(")"))
 137         return string.Empty;
 138
 139       return trimmedItem.Substring(TypePrefix.Length + 1, trimmedItem.Length - TypePrefix.Length - 2);
 140     }
 141
 142     protected readonly ApplicationController Controller;
 143   }
 144
 145   /// <summary>
 146   /// Closes LibCecTray
 147   /// </summary>
 148   internal class ApplicationActionCloseController : ApplicationAction
 149   {
 150     public ApplicationActionCloseController(ApplicationController controller)
 151       : base(controller, ActionType.CloseControllerApplication)
 152     {
 153     }
 154
 155     public override bool Transmit(IntPtr windowHandle)
 156     {
 157       Application.Exit();
 158       return true;
 159     }
 160
 161     public override string AsString()
 162     {
 163       return TypePrefix;
 164     }
 165
 166     public override string AsFriendlyString()
 167     {
 168       return string.Format("[{0}]", Resources.action_type_close_controller_application);
 169     }
 170
 171     public static bool HasDefaultValue(CecKeypress key)
 172     {
 173       return DefaultValue(key) != null;
 174     }
 175
 176     public static ApplicationAction DefaultValue(CecKeypress key)
 177     {
 178       switch (key.Keycode)
 179       {
 180         case CecUserControlCode.Power:
 181         case CecUserControlCode.PowerOnFunction:
 182         case CecUserControlCode.PowerOffFunction:
 183         case CecUserControlCode.PowerToggleFunction:
 184           return new ApplicationActionCloseController(null);
 185       }
 186       return null;
 187     }
 188
 189     public override bool Empty()
 190     {
 191       return false;
 192     }
 193
 194     public override bool CanAppend(ApplicationAction value)
 195     {
 196       return false;
 197     }
 198
 199     public override ApplicationAction Append(ApplicationAction value)
 200     {
 201       return this;
 202     }
 203
 204     public override ApplicationAction RemoveKey(int index)
 205     {
 206       return null;
 207     }
 208
 209     public static ApplicationAction FromString(ApplicationController controller, string value)
 210     {
 211       ApplicationActionCloseController retVal = new ApplicationActionCloseController(controller);
 212       return value.Trim().Equals(retVal.AsString()) ? retVal : null;
 213     }
 214   }
 215
 216   /// <summary>
 217   /// Starts an application
 218   /// </summary>
 219   internal class ApplicationActionStart : ApplicationAction
 220   {
 221     public ApplicationActionStart(ApplicationController controller) :
 222       base(controller, ActionType.StartApplication)
 223     {
 224     }
 225
 226     public override bool Transmit(IntPtr windowHandle)
 227     {
 228       return Controller.Start(false);
 229     }
 230
 231     public override string AsString()
 232     {
 233       return TypePrefix;
 234     }
 235
 236     public override string AsFriendlyString()
 237     {
 238       return string.Format("[{0}]", Resources.action_type_start_application);
 239     }
 240
 241     public override bool Empty()
 242     {
 243       return false;
 244     }
 245
 246     public override bool CanAppend(ApplicationAction value)
 247     {
 248       return false;
 249     }
 250
 251     public override ApplicationAction Append(ApplicationAction value)
 252     {
 253       return this;
 254     }
 255
 256     public override ApplicationAction RemoveKey(int index)
 257     {
 258       return null;
 259     }
 260
 261     public static ApplicationAction FromString(ApplicationController controller, string value)
 262     {
 263       ApplicationActionStart retVal = new ApplicationActionStart(controller);
 264       return value.Trim().Equals(retVal.AsString()) ? retVal : null;
 265     }
 266
 267     public static bool HasDefaultValue(CecKeypress key)
 268     {
 269       return DefaultValue(key) != null;
 270     }
 271
 272     public static ApplicationAction DefaultValue(CecKeypress key)
 273     {
 274       return null;
 275     }
 276   }
 277
 278   /// <summary>
 279   /// Sends one or more actions to an application
 280   /// </summary>
 281   internal class ApplicationInput : ApplicationAction
 282   {
 283     public ApplicationInput(ApplicationController controller) :
 284       base(controller, ActionType.Generic)
 285     {
 286     }
 287
 288     public static string FriendlyActionName(ActionType type)
 289     {
 290       switch (type)
 291       {
 292         case ActionType.Generic:
 293           return Resources.action_type_generic;
 294         case ActionType.CloseControllerApplication:
 295           return Resources.action_type_close_controller_application;
 296         case ActionType.StartApplication:
 297           return Resources.action_type_start_application;
 298         case ActionType.SendKey:
 299           return Resources.action_type_sendkey;
 300         default:
 301           return type.ToString();
 302       }
 303     }
 304
 305     public static ApplicationAction DefaultValue(ApplicationController controller, CecKeypress key)
 306     {
 307       return controller.HasDefaultValue(key) ? controller.DefaultValue(key) : new ApplicationInput(null);
 308     }
 309
 310     public override bool Empty()
 311     {
 312       foreach (var item in _input)
 313         if (!item.Empty())
 314           return false;
 315       return true;
 316     }
 317
 318     public override bool CanAppend(ApplicationAction value)
 319     {
 320       return true;
 321     }
 322
 323     public override ApplicationAction Append(ApplicationAction value)
 324     {
 325       if (value.Empty())
 326         return this;
 327
 328       var added = false;
 329       if (_input.Count > 0)
 330       {
 331         if (_input[_input.Count - 1].CanAppend(value))
 332         {
 333           _input[_input.Count - 1].Append(value);
 334           added = true;
 335         }
 336       }
 337       if (!added)
 338         _input.Add(value);
 339
 340       return this;
 341     }
 342
 343     public override bool Transmit(IntPtr windowHandle)
 344     {
 345       var retval = true;
 346       foreach (var input in _input)
 347       {
 348         retval &= input.Transmit(windowHandle);
 349       }
 350       return retval;
 351     }
 352
 353     public override string AsString()
 354     {
 355       StringBuilder sb = new StringBuilder();
 356       foreach (var input in _input)
 357       {
 358         sb.AppendFormat("{0} ", input.AsString());
 359       }
 360       return sb.ToString().TrimEnd();
 361     }
 362
 363     public override string AsFriendlyString()
 364     {
 365       StringBuilder sb = new StringBuilder();
 366       foreach (var input in _input)
 367         sb.AppendFormat("{0} ", input.AsFriendlyString());
 368       return sb.ToString().Trim();
 369     }
 370
 371     public override ApplicationAction RemoveKey(int index)
 372     {
 373       var ptr = 0;
 374       for (var itemPtr = 0; itemPtr < _input.Count; itemPtr++)
 375       {
 376         var item = _input[itemPtr];
 377         var currentPtr = item.AsFriendlyString().Length;
 378         if (index <= ptr + currentPtr)
 379         {
 380           var newItem = item.RemoveKey(index - ptr);
 381           if (newItem == null || newItem.Empty())
 382             _input.Remove(item);
 383           else
 384             _input[itemPtr] = newItem;
 385           break;
 386         }
 387         ptr += currentPtr;
 388       }
 389       return this;
 390     }
 391
 392     public ApplicationInput RemoveItem(int index)
 393     {
 394       return RemoveKey(index) as ApplicationInput;
 395     }
 396
 397     public static ApplicationInput FromString(ApplicationController controller, string value)
 398     {
 399       ApplicationInput retVal = new ApplicationInput(controller);
 400       var split = value.Trim().Split(' ');
 401       foreach (var item in split)
 402       {
 403         var addAction = KeyInput.FromString(controller, item);
 404
 405         if (addAction == null || addAction.Empty())
 406           addAction = ApplicationActionCloseController.FromString(controller, item);
 407
 408         if (addAction == null || addAction.Empty())
 409           addAction = ApplicationActionStart.FromString(controller, item);
 410
 411         if (addAction != null && !addAction.Empty())
 412           retVal.Append(addAction);
 413       }
 414       return retVal;
 415     }
 416
 417     public ApplicationInput AddKey(WindowsAPI.VirtualKeyCode keyCode)
 418     {
 419       var key = new KeyInput(Controller, keyCode);
 420       if (!key.Empty())
 421         Append(key);
 422       return this;
 423     }
 424
 425     public ApplicationInput AddAction(ActionType action)
 426     {
 427       switch (action)
 428       {
 429         case ActionType.CloseControllerApplication:
 430           Append(new ApplicationActionCloseController(Controller));
 431           break;
 432         case ActionType.StartApplication:
 433           Append(new ApplicationActionStart(Controller));
 434           break;
 435       }
 436       return this;
 437     }
 438
 439     private readonly List<ApplicationAction> _input = new List<ApplicationAction>();
 440   }
 441 }