Clipboard Transformations

Root documentation of this application at: Python Smart ClipBoard This page is the documentation for the details of the Transformations.

General

The application deals only with unformatted text in the clipboard. Images.... are not processed. Formatted text is converted ( irreversibly ) to unformatted text unless the off radio button is depressed before the selection is "clipped". You can ususally return to the unformatted, untransformed version of the clipboard by pressing either <off> or <unformatted>. If you press an unintended button, just go back and press the intended one.

A transformation takes in some text, typically multi-lined and converts it to something else, also possibly multi-lined. The transformed text is placed in the system clipboard and displayed in the application GUI. Each time a transformation button is pressed the original text in the clipboard is transformed. To apply a new transformation to the result of the last transformation press the <Chain> button. Once Chain is pressed the original clipped text is gone.

Transformations Do What

You can tell what each transformation does by:

• Hopefully each name is suggestive <CAP> capitalizes the text.
• The GUI documentation gives a somewhat expanded explanation of each transformation ClipBoard GUI
• Try them out, just do not "paste" results you do not like.
• More documentation here ?
• Read the code: cmd_processor.transform_{some suggestive name }

• Some functions may remove blank lines.
• Some functions may remove lines commented with #

General Rules

Most transformations ( and perhaps all in the future ) do some general processing:

• Break the text into multiple lines using a variety of markers ( see Python splitlines ),
• Delete trailing spaces on each line
• Joins lines back using a standard line marker ( cmd_processor.line_join )
• White space is used in the same sense as Python. In includes spaces, tabs \n \r and other characters.

Individual Transformations

The GUI names should match those below, but use a bit of caution.

Add *>url

• What:
• Why: to save url's in command format for later use with *cmd button
• Lines with a url have *>url pre-pended to the line. This is the command indicatior for the *cmd button to go to a given url.
• Lines without urls are left unaltered.

Add *>shell

• What:
• Why:

Alt Line Sort 0

• What:
• Why: I use this to sort url and page titles captured from my browser, typically saved for links
• Text is broken up into pairs of lines, blank lines being dropped.
• The pair is sorted on the contents of the first line in the pair.
• The text is rebuilt with a blank line separating each pair.

CAP

• What:
• Why:

Line Num

• What:
• Why:

No Trail Space

• What: Remove all trailing white space.
• Why: Trailing white space is just a waste of space and may slow down code editing.

No Trail Space

• What: Remove all trailing white space.
• Why: Trailing white space is just a waste of space and may slow down code editing.

Less WS

• What: Remove multiple white space characters in a row replacing them with a single space.
• Why:

Line Sort

• What:
• Why:

Line Num

• What: Put sequential numbers in front of each non-blank lines
• Why: Sometimes nice to have you lines numbered.

No WS

• What: Remove all white space.
• Why:

Tab > Space

• What: Rempve all tab characters changing them to spaces.
• Why: Python programmers tend to prefer spaces over tabs. A mix of them can be confusing when editiong, and can cause Python programs that look correct to fail.

Customization

Writing your own Transforms is a bit more complicated than snippets or snips. It involves code in two parts of the application. One part does the transformation, the other provides the GUI. The parameter file is not involved. If you want to remove a transformation I would remove the GUI component only. You can do this by commenting out the part of the code in gui.py. This is more or less the reverse of adding a transform to the GUI.

Transform Code

The text you get from the system is a string, and you modify it to return a string. To do this you need to understand something about string handling in Python. So we will assume this. Before modifying code lets look at a simple example.

In your IDE for Python ( or text editor ) open cmd_processor.py. All the transforms are functions named transform_xxxxxxxx. Lets look at cmd_processor.transform_lower(). The heart of the code is: ret_text = in_text.lower() which simply uses the Python function to lower case. The other two lines before the return do:

• Split the text to a list with one line in each list item, each line cleaned up a bit ( like stripping trailing spaces )
• Combine the lines into one long string.

The return is a tuple

• First a Boolean, it indicates the success of the operation
• Second a string a comment on the operation
• Third a string, the transformed text.

To learn more about the transforms read the code, then write yours following the conventions in this one.

GUI Code

You still need a button on the GUI to activate your code. This will be in gui.py. Look for a method called _make_transform_frame_(). In it is a section for each button, with a comment setting off each one.

Lets look at:

  # -------- transform_lower,
        ix_rb_index  += 1
        ix_col       += 1
        self.lower_rb   = ix_col

        self.make_and_place_transform_buttons_3 ( a_frame,  text = "lower",
                                   ix_row                   = ix_row, ix_col = ix_col,
                                   button_var               = self.button_var,
                                   button_command           = AppGlobal.cmd_processor.transform_lower,    
                                   rb_index                 = ix_rb_index )

 

Your button will be pretty much the same inserted in order of where you want your button to occur in the GUI ( left to right, top to bottom ).

So:

• Make a copy of an existing button's code. If the code differs a bit from the above go with the code not this documentation.
• Paste in where you want it.
• Change the comment line
• For the line that says self.lower_rb, make a new name for your radio button and put it in, or just get rid of the line if you do not need a name ( added buttons need not be named )
• AppGlobal.cmd_processor.transform_lower, needs to have the name of your function replace transform_lower
• Save and if you have not messed up everything will work.