VSIX Extension: how to make atomic undo upon text replacement












1















I am writing an Visual Studio Extension module (VSIX ), which allows the user to select text and upon a menu command, the selected text is replaced with a new text:



var document = ProjectHelpers.DTE.ActiveDocument;
var selection = (TextSelection)document.Selection;
var text = selection.Text;
string newText = doSomethingWith(text);
selection.Text = newText;


Now the problem is, when I wish to undo the operation (e.g. via Ctrl-Z), only one line at a time of the new text is removed and finally the original text is restored (need to use Ctrl-Z many times).



How can I implement an atomic undo, where only one Ctrl-Z command un-does the whole process?



In case it matters, I am writing for VS2017.










share|improve this question



























    1















    I am writing an Visual Studio Extension module (VSIX ), which allows the user to select text and upon a menu command, the selected text is replaced with a new text:



    var document = ProjectHelpers.DTE.ActiveDocument;
    var selection = (TextSelection)document.Selection;
    var text = selection.Text;
    string newText = doSomethingWith(text);
    selection.Text = newText;


    Now the problem is, when I wish to undo the operation (e.g. via Ctrl-Z), only one line at a time of the new text is removed and finally the original text is restored (need to use Ctrl-Z many times).



    How can I implement an atomic undo, where only one Ctrl-Z command un-does the whole process?



    In case it matters, I am writing for VS2017.










    share|improve this question

























      1












      1








      1








      I am writing an Visual Studio Extension module (VSIX ), which allows the user to select text and upon a menu command, the selected text is replaced with a new text:



      var document = ProjectHelpers.DTE.ActiveDocument;
      var selection = (TextSelection)document.Selection;
      var text = selection.Text;
      string newText = doSomethingWith(text);
      selection.Text = newText;


      Now the problem is, when I wish to undo the operation (e.g. via Ctrl-Z), only one line at a time of the new text is removed and finally the original text is restored (need to use Ctrl-Z many times).



      How can I implement an atomic undo, where only one Ctrl-Z command un-does the whole process?



      In case it matters, I am writing for VS2017.










      share|improve this question














      I am writing an Visual Studio Extension module (VSIX ), which allows the user to select text and upon a menu command, the selected text is replaced with a new text:



      var document = ProjectHelpers.DTE.ActiveDocument;
      var selection = (TextSelection)document.Selection;
      var text = selection.Text;
      string newText = doSomethingWith(text);
      selection.Text = newText;


      Now the problem is, when I wish to undo the operation (e.g. via Ctrl-Z), only one line at a time of the new text is removed and finally the original text is restored (need to use Ctrl-Z many times).



      How can I implement an atomic undo, where only one Ctrl-Z command un-does the whole process?



      In case it matters, I am writing for VS2017.







      c# visual-studio vsix undo






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      share|improve this question











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      asked Nov 28 '18 at 23:31









      MiB_CoderMiB_Coder

      301311




      301311
























          1 Answer
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          The solution is to create an undo context, in which all changes can be collected, which should appear as a single transaction:



          try
          {
          ProjectHelpers.DTE.UndoContext.Open("Description of operation");
          selection.Text = newText;
          }
          finally
          {
          ProjectHelpers.DTE.UndoContext.Close();
          }





          share|improve this answer


























          • Can you explain how this answers the question?

            – axblount
            Nov 29 '18 at 17:55












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          1 Answer
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          oldest

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          active

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          0














          The solution is to create an undo context, in which all changes can be collected, which should appear as a single transaction:



          try
          {
          ProjectHelpers.DTE.UndoContext.Open("Description of operation");
          selection.Text = newText;
          }
          finally
          {
          ProjectHelpers.DTE.UndoContext.Close();
          }





          share|improve this answer


























          • Can you explain how this answers the question?

            – axblount
            Nov 29 '18 at 17:55
















          0














          The solution is to create an undo context, in which all changes can be collected, which should appear as a single transaction:



          try
          {
          ProjectHelpers.DTE.UndoContext.Open("Description of operation");
          selection.Text = newText;
          }
          finally
          {
          ProjectHelpers.DTE.UndoContext.Close();
          }





          share|improve this answer


























          • Can you explain how this answers the question?

            – axblount
            Nov 29 '18 at 17:55














          0












          0








          0







          The solution is to create an undo context, in which all changes can be collected, which should appear as a single transaction:



          try
          {
          ProjectHelpers.DTE.UndoContext.Open("Description of operation");
          selection.Text = newText;
          }
          finally
          {
          ProjectHelpers.DTE.UndoContext.Close();
          }





          share|improve this answer















          The solution is to create an undo context, in which all changes can be collected, which should appear as a single transaction:



          try
          {
          ProjectHelpers.DTE.UndoContext.Open("Description of operation");
          selection.Text = newText;
          }
          finally
          {
          ProjectHelpers.DTE.UndoContext.Close();
          }






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 30 '18 at 7:16

























          answered Nov 29 '18 at 15:53









          MiB_CoderMiB_Coder

          301311




          301311













          • Can you explain how this answers the question?

            – axblount
            Nov 29 '18 at 17:55



















          • Can you explain how this answers the question?

            – axblount
            Nov 29 '18 at 17:55

















          Can you explain how this answers the question?

          – axblount
          Nov 29 '18 at 17:55





          Can you explain how this answers the question?

          – axblount
          Nov 29 '18 at 17:55




















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