//
// (C) Copyright 2003-2016 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
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// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
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// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//

using System;
using System.Windows.Forms;
using System.Collections;
using System.Collections.Generic;

using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;


namespace Revit.SDK.Samples.CapitalizeAllTextNotes.CS
{
   /// <summary>
   /// Find all the TextNote instances in the document and change their formatting to 'AllCaps'
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class Command : IExternalCommand
   {
      /// <summary>
      /// Implement this method as an external command for Revit.
      /// </summary>
      /// <param name="commandData">An object that is passed to the external application 
      /// which contains data related to the command, 
      /// such as the application object and active view.</param>
      /// <param name="message">A message that can be set by the external application 
      /// which will be displayed if a failure or cancellation is returned by 
      /// the external command.</param>
      /// <param name="elements">A set of elements to which the external application 
      /// can add elements that are to be highlighted in case of failure or cancellation.</param>
      /// <returns>Return the status of the external command. 
      /// A result of Succeeded means that the API external method functioned as expected. 
      /// Cancelled can be used to signify that the user cancelled the external operation 
      /// at some point. Failure should be returned if the application is unable to proceed with 
      /// the operation.</returns>
      public virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            Document document = commandData.Application.ActiveUIDocument.Document;


            // Iterate through the document and find all the TextNote elements
            FilteredElementCollector collector = new FilteredElementCollector(document);
            collector.OfClass(typeof(TextNote));
            if (collector.GetElementCount() == 0)
            {
               message = "The document does not contain TextNote elements";
               return Result.Failed;
            }

            // Record all TextNotes that are not yet formatted to be 'AllCaps'
            ElementSet textNotesToUpdate = new Autodesk.Revit.DB.ElementSet();
            foreach (Element element in collector)
            {
               TextNote textNote = (TextNote) element;

               // Extract the FormattedText from the TextNote
               FormattedText formattedText = textNote.GetFormattedText();

               // If 'GetAllCapsStatus()' returns 'FormatStatus.All' then all the characters in
               // the text have the 'AllCaps' status.
               // If there are no characters that have the 'AllCaps' status then 'GetAllCapsStatus()'
               // will return 'FormatStatus.None'.  And if only some of the characters have 
               // the 'AllCaps' status then 'GetAllCapsStatus()' returns 'FormatStatus.Mixed'
               //
               // Note that it is also possible to test whether all characters are 
               // bold, italic, underlined, or have superscript or subscript formatting.
               // See 'GetBoldStatus', 'GetItalicStatus', 'GetUnderlineStatus', 
               // 'GetSuperscriptStatus', and 'GetSubscriptStatus' respectively.
               //
               // Note that it is also possible to only test a subset of characters in the FormattedText
               // This is done by calling these methods with a 'TextRange' that specifies 
               // the range of characters to be tested.

               if (formattedText.GetAllCapsStatus() != FormatStatus.All)
               {
                  textNotesToUpdate.Insert(textNote);
               }
            }

            // Check whether we found any TextNotes that need to be formatted
            if (textNotesToUpdate.IsEmpty)
            {
               message = "No TextNote elements needed updating";
               return Result.Failed;
            }


            // Apply the 'AllCaps' formatting to the TextNotes that still need it.
            using (Transaction transaction = new Transaction(document, "Capitalize All TextNotes"))
            {
               transaction.Start();

               foreach (TextNote textNote in textNotesToUpdate)
               {
                  Autodesk.Revit.DB.FormattedText formattedText = textNote.GetFormattedText();

                  // Apply the 'AllCaps' status to all characters.
                  // Note that there are also methods to apply bold, italic, underline, 
                  // superscript and subscript formatting.  
                  // And that the formatting can be applied both to the entire text
                  // (as is done here), or to a subset by calling these methods with a 'TextRange'

                  formattedText.SetAllCapsStatus(true);

                  // After making the changes to the Formatted text
                  // it is necessary to apply them to the TextNote element
                  // (or elements) that should get these changes.
                  textNote.SetFormattedText(formattedText);
               }

               transaction.Commit();
            }

            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
}