Keypress handler for Zen textarea controls which automatically inserts the indentation used on the previous line of the control when the user hits the Enter key. Note that the actual whitespace determination is performed in getPrevWhitespace().

Helper method to supply anticipated indentiation required based on preceeding code input lines (previousData)

Object Script and Basic

Continue previous indent or default to indent of two whitespace characters

Python code entry conveniences

Feature Colon ":"

When the user types colon ":" ( ignoring trailing white space) + Enter key. This will automatically increment indent for new or nested block

for item in range(0,int(request.StringVaue)):
  context.TheList.Insert(item+1)

Where indent of increment was automatically provided for new line starting "context.TheList ..."

Feature "pass" keyword

When a line only contains pass keyword anticipate placeholder for code block and decrement indent on the following line

if (x==1):
  pass
else:
  pass

Where indent was automatically decremented on new line after "pass" keyword

Feature Empty lines

Second empty line indicates end of block scope When two sequential empty lines ( ignoring whitespace ) are typed, the following new line will decrement the indent

	for item in range(0,int(request.StringValue)):
	  context.TheList.Insert(item+1)
	  
	  
	if (x==1):
	  pass

At end of line with "context ... " line, enter key was pressed three times. The increment is automatically decremented so that the "if" command starts in a lower code block scope In this example no indent was needed.