copy as - Paste data into Mathematica with formatting

Select the following Mathematica code and paste it into a notebook. In Windows 7(Mathematica 8) the line breaks are not interpreted in the expression. In fact any data copipasted from stackexchange loses it's formatting. How do I paste content from stackexchange into Mathematica while keeping the formatting?

Print[
  "text"
]

EDIT: I don't particularly like Code Cells because they don't auto format and don't wrap when over 80 characters naturally. Another option which I had forgotten is AutoSpacing->True although I'd like to preserve line breaks and not white spaces entirely.

Answer

As Mr.Wizard showed me here. You use UndocumentedTestFEParserPacket to print the pasted data. For example:

FixSpacesAndLineBreaksFormatting[t_] := (StringReplace[t, {
     RegularExpression["^[ ]+$"] -> "",
     "\n" -> "\[IndentingNewLine]"}]);

CellPrint@Cell[
  Replace[
   First@FrontEndExecute@UndocumentedTestFEParserPacket[
      Catch[NotebookGet@ClipboardNotebook[]

        /. Cell[r_, ___] :> Block[{}, Throw[r, tag] /; True];
       $Failed, tag]
      , False]
   , t_String :> FixSpacesAndLineBreaksFormatting[t], Infinity]
  , "Input"]

If you want a shortcut you can run the following to assign it to Ctrl+Shift+V as described here.

FixSpacesAndLineBreaksFormatting[t_] := (StringReplace[t, {
     RegularExpression["^[ ]+$"] -> "",
     "\n" -> "\[IndentingNewLine]"}]);


FrontEndExecute[
 FrontEnd`AddMenuCommands[
  "DuplicatePreviousOutput", {Delimiter,
   MenuItem["Raw Paste Clipboard",
    FrontEnd`KernelExecute[NotebookWrite[InputNotebook[],
      Replace[
       First@FrontEndExecute@UndocumentedTestFEParserPacket[
          Catch[NotebookGet@ClipboardNotebook[]
            /. Cell[r_, ___] :> Block[{}, Throw[r, tag] /; True];

           $Failed, tag]
          , False]
       , t_String :> FixSpacesAndLineBreaksFormatting[t], Infinity]
      ]], MenuKey["v", Modifiers -> {"Control", "Shift"}],
    System`MenuEvaluator -> Automatic]}]]

Or do the add the following to KeyEventTranslations as described here. EDIT: This doesn't seem to be working currently and advised fix would be great. You can the put the AddMenuCommands in init.m as workaround.

Comments

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