libs/js/jquery-mobile-1.1.0/js/jquery.mobile.zoom.js

   1 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
   2 //>>description: Utility methods for enabling and disabling user scaling (pinch zoom)
   3 //>>label: Zoom Handling
   4 //>>group: Utilities
   5
   6 define( [ "jquery", "./jquery.mobile.core" ], function( $ ) {
   7 //>>excludeEnd("jqmBuildExclude");
   8 ( function( $ ) {
   9         var     meta = $( "meta[name=viewport]" ),
  10         initialContent = meta.attr( "content" ),
  11         disabledZoom = initialContent + ",maximum-scale=1, user-scalable=no",
  12         enabledZoom = initialContent + ",maximum-scale=10, user-scalable=yes",
  13                 disabledInitially = /(user-scalable[\s]*=[\s]*no)|(maximum-scale[\s]*=[\s]*1)[$,\s]/.test( initialContent );
  14
  15         $.mobile.zoom = $.extend( {}, {
  16                 enabled: !disabledInitially,
  17                 locked: false,
  18                 disable: function( lock ) {
  19                         if( !disabledInitially && !$.mobile.zoom.locked ){
  20                         meta.attr( "content", disabledZoom );
  21                         $.mobile.zoom.enabled = false;
  22                                 $.mobile.zoom.locked = lock || false;
  23                         }
  24                 },
  25                 enable: function( unlock ) {
  26                         if( !disabledInitially && ( !$.mobile.zoom.locked || unlock === true ) ){
  27                         meta.attr( "content", enabledZoom );
  28                         $.mobile.zoom.enabled = true;
  29                                 $.mobile.zoom.locked = false;
  30                         }
  31                 },
  32                 restore: function() {
  33                         if( !disabledInitially ){
  34                         meta.attr( "content", initialContent );
  35                         $.mobile.zoom.enabled = true;
  36                         }
  37                 }
  38         });
  39
  40 }( jQuery ));
  41 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
  42 });
  43 //>>excludeEnd("jqmBuildExclude");