resources/src/mediawiki.action/mediawiki.action.view.redirect.js

   1 /*!
   2  * JavaScript to update page URL when a redirect is viewed, ensuring that the
   3  * page is scrolled to the id when it's a redirect with fragment.
   4  *
   5  * This is loaded in the top queue, so avoid unnecessary dependencies
   6  * like mediawiki.Title or mediawiki.Uri.
   7  */
   8 ( function ( mw, $ ) {
   9         var profile = $.client.profile(),
  10                 canonical = mw.config.get( 'wgInternalRedirectTargetUrl' ),
  11                 fragment = null,
  12                 shouldChangeFragment, index;
  13
  14         // Clear internal mw.config entries, so that no one tries to depend on them
  15         mw.config.set( 'wgInternalRedirectTargetUrl', null );
  16
  17         // Deployment hack for compatibility with cached HTML, remove before 1.24 release
  18         if ( !canonical ) {
  19                 canonical = mw.config.get( 'wgRedirectToFragment' );
  20         }
  21
  22         index = canonical.indexOf( '#' );
  23         if ( index !== -1 ) {
  24                 fragment = canonical.slice( index );
  25         }
  26
  27         // Never override the fragment if the user intended to look at a different section
  28         shouldChangeFragment = fragment && !location.hash;
  29
  30         // Replace the whole URL if possible, otherwise just change the fragment
  31         if ( canonical && history.replaceState ) {
  32                 if ( !shouldChangeFragment ) {
  33                         // If the current page view has a fragment already, don't override it
  34                         canonical = canonical.replace( /#.*$/, '' );
  35                         canonical += location.hash;
  36                 }
  37
  38                 // This will also cause the browser to scroll to given fragment
  39                 history.replaceState( /*data=*/ history.state, /*title=*/ document.title, /*url=*/ canonical );
  40
  41                 // …except for IE 10 and 11. Prod it with a location.hash change.
  42                 if ( shouldChangeFragment && profile.name === 'msie' && profile.versionNumber >= 10 ) {
  43                         location.hash = fragment;
  44                 }
  45
  46         } else if ( shouldChangeFragment ) {
  47                 if ( profile.layout === 'webkit' && profile.layoutVersion < 420 ) {
  48                         // Released Safari w/ WebKit 418.9.1 messes up horribly
  49                         // Nightlies of 420+ are ok
  50                         return;
  51                 }
  52
  53                 location.hash = fragment;
  54         }
  55
  56         if ( shouldChangeFragment && profile.layout === 'gecko' ) {
  57                 // Mozilla needs to wait until after load, otherwise the window doesn't
  58                 // scroll.  See <https://bugzilla.mozilla.org/show_bug.cgi?id=516293>.
  59                 // There's no obvious way to detect this programmatically, so we use
  60                 // version-testing.  If Firefox fixes the bug, they'll jump twice, but
  61                 // better twice than not at all, so make the fix hit future versions as
  62                 // well.
  63                 $( function () {
  64                         if ( location.hash === fragment ) {
  65                                 location.hash = fragment;
  66                         }
  67                 } );
  68         }
  69
  70 }( mediaWiki, jQuery ) );