Adapt analytics utility code to log print, copy, paste

[khawkins98]

It would be useful to know how often users print, copy, paste on a page.

Print and paste information would only work for desktop keyboard commands (not mobile or when a menu has been used), even so some indication would still be helpful.

Via https://stackoverflow.com/questions/2903991/how-to-detect-ctrlv-ctrlc-using-javascript/2904944#2904944

$(document).ready(function() {
    var ctrlDown = false,
        ctrlKey = 17,
        cmdKey = 91,
        vKey = 86,
        cKey = 67;

    $(document).keydown(function(e) {
        if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = true;
    }).keyup(function(e) {
        if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = false;
    });

    $(".trackable-area").keydown(function(e) {
        if (ctrlDown && (e.keyCode == vKey || e.keyCode == cKey)) {
          // doLogging();
        }
    });
});

and/or

   $(document).bind('copy', function(e) {
      // doLogging();
    }); 
    $(document).bind('paste', function() {
      // doLogging();
    }); 
    $(document).bind('cut', function() {
      // doLogging();
    });
    $(document).bind('contextmenu', function(e) {
      // doLogging();
    });

For copy we can get a broader idea by tracking text selection:

Via https://www.savio.no/analytics/track-if-visitors-copy-your-text-in-google-analytics

function getSelected() {
  if (window.getSelection) {
    return window.getSelection();
  } else if (document.getSelection) {
    return document.getSelection();
  } else {
    var selection = document.selection && document.selection.createRange();
    if (selection.text) {
      return selection.text;
    }
    return false;
  }
  return false;
}
$(document).ready(function() {
  $('body').on('copy cut paste', function(ccp) { // Track cut, copy or paste with jQuery.
    var selection = getSelected();
    var maxLength = 150; // Up to 150 Characters from your text will be tracked. Change this number if you want to track more or less text.
    if (selection && (selection = new String(selection).replace(/^\s+|\s+$/g, ''))) {
      var textLength = selection.length; // How many characters was copied/cutted/pasted.
      if (selection.length > maxLength) {
        selection = selection.substr(0, maxLength) + "..."
      } // If the text is longer than maxLength, add ... to the end of the text
      else {
        selection = selection; // If the text is shorter than maxLength, just track the text as it is.
      }
      _gaq.push(['_trackEvent', 'Clipboard', ccp.type, selection, textLength]);
      // Track copied/cutted/pasted data in Google Analytics as Events
    }
  });
});