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/*
* Greedy_Delete.bsh - If a buffer is using soft tabs,
* this macro will delete tabSize number of spaces, if
* all the characters between the caret and the next tab
* stop are spaces.  In all other cases a single character
* is deleted.
*
* Copyright (C) 2004 Ollie Rutherfurd <[email protected]>
*
* $Id: Greedy_Delete.bsh 23971 2015-08-08 19:37:35Z daleanson $
*/

/**
* @param onlyFullTabs if true, multiple spaces are only
*                     removed if they would constitute
*                     a 'complete' tab.
*/
void greedyDelete(View view, boolean onlyFullTabs)
{
JEditTextArea textArea = view.getTextArea();
JEditBuffer buffer = textArea.getBuffer();
int caret = textArea.getCaretPosition();
int caretLine = textArea.getCaretLine();
int lineStart = textArea.getLineStartOffset(caretLine);
int lineEnd = textArea.getLineEndOffset(caretLine);

if(buffer.getBooleanProperty("noTabs") == true)
{
  // if anything is selected, use standard
  if(textArea.getSelection().length != 0)
  {
   textArea.delete();
  }
  // if at the end of the line, go to the
  // start of the next line (+1 for \n)
  else if(caret+1 >= lineEnd)
  {
   textArea.delete();
  }
  else
  {
   int col = caret - lineStart;
   int tabSize = buffer.getIntegerProperty("tabSize",8);

   // unlikely, but just in case
   if(tabSize <= 0)
   {
    textArea.delete();
   }
   else
   {
    int toTabStop = (((col+tabSize)-1) % tabSize) + 1;
    // don't wrap to next line
    if(caret+toTabStop > lineEnd){
     textArea.delete();
     return;
    }

    int count = 0;
    for(int i=0; i < toTabStop; i++)
    {
     if(!" ".equals(buffer.getText(caret+i,1)))
      break;
     count += 1;
    }

    // if onlyFullTabs must be only spaces to
    // the tabStop and must have tabSize number
    // of spaces to remove them all.
    if(onlyFullTabs == false || count == tabSize){
     buffer.remove(caret,count);
    }
    else{
     textArea.delete();
    }
   }
  }
}
else
  textArea.delete();
}

greedyDelete(view,true);

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