User:Splarka/softfocus.js

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Documentation for this user script can be added at User:Splarka/softfocus.

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/* Soft searchbox focuser, version [0.0.2a]
Originally from: http://en.wikipedia.org/wiki/User:Splarka/softfocus.js

Notes:
* Sets focus on the search box
* Blurs focus during: home/end/pageup/pagedown and up/down/left/right and escape if textbox is empty
** Allows said key to perform action it was performing
* Not tested on any browsers but Mozilla/FF, but should work in theory
** Might actually be necessary to use "onkeypress" in IE, not sure
*/

if(!window.mwDisableSearchAutoFocus) addOnloadHook(function() {
  var search = document.getElementById('searchInput');
  if(!search || window.location.hash.indexOf( '#' ) != -1) return
  search.focus();
  addHandler(search,'keydown',searchFocusKeydown);
});

function searchFocusKeydown(e) {
  var e = window.event || e;
  var key = e.charCode || e.keyCode;
  if(key == 27 || (key >= 32 && key <= 40)) {
    var search = document.getElementById('searchInput');
    if(search && search.value == '') search.blur()
  }
  return true;
}