libs/js/jquery-mobile-1.2.0/js/events/throttledresize.js

   1 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
   2 //>>description: Throttled resize event
   3 //>>label: throttledresize
   4 //>>group: Events
   5
   6 define( [ "jquery" ], function( jQuery ) {
   7 //>>excludeEnd("jqmBuildExclude");
   8
   9         // throttled resize event
  10         (function( $ ) {
  11                 $.event.special.throttledresize = {
  12                         setup: function() {
  13                                 $( this ).bind( "resize", handler );
  14                         },
  15                         teardown: function() {
  16                                 $( this ).unbind( "resize", handler );
  17                         }
  18                 };
  19
  20                 var throttle = 250,
  21                         handler = function() {
  22                                 curr = ( new Date() ).getTime();
  23                                 diff = curr - lastCall;
  24
  25                                 if ( diff >= throttle ) {
  26
  27                                         lastCall = curr;
  28                                         $( this ).trigger( "throttledresize" );
  29
  30                                 } else {
  31
  32                                         if ( heldCall ) {
  33                                                 clearTimeout( heldCall );
  34                                         }
  35
  36                                         // Promise a held call will still execute
  37                                         heldCall = setTimeout( handler, throttle - diff );
  38                                 }
  39                         },
  40                         lastCall = 0,
  41                         heldCall,
  42                         curr,
  43                         diff;
  44         })( jQuery );
  45 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
  46 });
  47 //>>excludeEnd("jqmBuildExclude");