ParserTwo Applet Test

MAS 962: Digital Typography

Problem Set One, Problem 3.

Like the Parser applet, the ParserTwo applet employs a cypher to translate from one text string to another. However, the ParserTwo applet uses special mode-shifting characters to alter the translation, essentially adding another layer to the cypher. The cypher is specified by the input URL http://acg.media.mit.edu/mas962/ps1/code.txt, which is displayed in the TextArea widget of the applet at start up.

The special characters and their effects are as follows:

Bang (!) results in a letter shift.
The sequence !n, where n is a number between 0 and 9 shifts the output by n letters. Bang not followed by a number in the input string resets the letter shifg. Note that letter shifts are cumulative, so the input string *!a!1a!1a!1a* will result in the translation abcd.
Pound (#) results in a cypher shift.
The sequence #n, where n is a number between 0 and 9 shifts the output by n tokens in the cypher. Pound not followed by a number in the input string resets the cypher shift. Note that cypher shifts are cumulative, so the input string !#a #1a #1a could result in the translation apple bear cat.
Hat (^) toggles capitalization of the output.
Star (*) toggles translation of the ouput on and off.

Strings typed into the applet's TextField widget will be translated according to the cypher and mode into output strings in the TextField widget. Characters in the input string which are not recognised as part of the cypher are copied verbatam into the output string.

The ParserTwo Java source code is a derived class of the Parser applet.