skins/common/ajaxwatch.js

   1 // dependencies:
   2 // * ajax.js:
   3   /*extern sajax_init_object, sajax_do_call */
   4 // * wikibits.js:
   5   /*extern changeText, akeytt, hookEvent, jsMsg */
   6
   7 // These should have been initialized in the generated js
   8 /*extern wgAjaxWatch, wgPageName */
   9
  10 if(typeof wgAjaxWatch === "undefined" || !wgAjaxWatch) {
  11         var wgAjaxWatch = {
  12                 watchMsg: "Watch",
  13                 unwatchMsg: "Unwatch",
  14                 watchingMsg: "Watching...",
  15                 unwatchingMsg: "Unwatching..."
  16         };
  17 }
  18
  19 wgAjaxWatch.supported = true; // supported on current page and by browser
  20 wgAjaxWatch.watching = false; // currently watching page
  21 wgAjaxWatch.inprogress = false; // ajax request in progress
  22 wgAjaxWatch.timeoutID = null; // see wgAjaxWatch.ajaxCall
  23 wgAjaxWatch.watchLinks = []; // "watch"/"unwatch" links
  24
  25 wgAjaxWatch.setLinkText = function(newText) {
  26         for (i = 0; i < wgAjaxWatch.watchLinks.length; i++) {
  27                 changeText(wgAjaxWatch.watchLinks[i], newText);
  28         }
  29 };
  30
  31 wgAjaxWatch.setLinkID = function(newId) {
  32         // We can only set the first one
  33         wgAjaxWatch.watchLinks[0].setAttribute( 'id', newId );
  34         akeytt(newId); // update tooltips for Monobook
  35 };
  36
  37 wgAjaxWatch.setHref = function( string ) {
  38         for( i = 0; i < wgAjaxWatch.watchLinks.length; i++ ) {
  39                 if( string == 'watch' ) {
  40                         wgAjaxWatch.watchLinks[i].href = wgAjaxWatch.watchLinks[i].href
  41                                 .replace( /&action=unwatch/, '&action=watch' );
  42                 } else if( string == 'unwatch' ) {
  43                         wgAjaxWatch.watchLinks[i].href = wgAjaxWatch.watchLinks[i].href
  44                                 .replace( /&action=watch/, '&action=unwatch' );
  45                 }
  46         }
  47 }
  48
  49 wgAjaxWatch.ajaxCall = function() {
  50         if(!wgAjaxWatch.supported) {
  51                 return true;
  52         } else if (wgAjaxWatch.inprogress) {
  53                 return false;
  54         }
  55         if(!wfSupportsAjax()) {
  56                 // Lazy initialization so we don't toss up
  57                 // ActiveX warnings on initial page load
  58                 // for IE 6 users with security settings.
  59                 wgAjaxWatch.supported = false;
  60                 return true;
  61         }
  62
  63         wgAjaxWatch.inprogress = true;
  64         wgAjaxWatch.setLinkText( wgAjaxWatch.watching
  65                 ? wgAjaxWatch.unwatchingMsg : wgAjaxWatch.watchingMsg);
  66         sajax_do_call(
  67                 "wfAjaxWatch",
  68                 [wgPageName, (wgAjaxWatch.watching ? "u" : "w")],
  69                 wgAjaxWatch.processResult
  70         );
  71         // if the request isn't done in 10 seconds, allow user to try again
  72         wgAjaxWatch.timeoutID = window.setTimeout(
  73                 function() { wgAjaxWatch.inprogress = false; },
  74                 10000
  75         );
  76         return false;
  77 };
  78
  79 wgAjaxWatch.processResult = function(request) {
  80         if(!wgAjaxWatch.supported) {
  81                 return;
  82         }
  83         var response = request.responseText;
  84         if( response.match(/^<w#>/) ) {
  85                 wgAjaxWatch.watching = true;
  86                 wgAjaxWatch.setLinkText(wgAjaxWatch.unwatchMsg);
  87                 wgAjaxWatch.setLinkID("ca-unwatch");
  88                 wgAjaxWatch.setHref( 'unwatch' );
  89         } else if( response.match(/^<u#>/) ) {
  90                 wgAjaxWatch.watching = false;
  91                 wgAjaxWatch.setLinkText(wgAjaxWatch.watchMsg);
  92                 wgAjaxWatch.setLinkID("ca-watch");
  93                 wgAjaxWatch.setHref( 'watch' );
  94         } else {
  95                 // Either we got a <err#> error code or it just plain broke.
  96                 window.location.href = wgAjaxWatch.watchLinks[0].href;
  97                 return;
  98         }
  99         jsMsg( response.substr(4), 'watch' );
 100         wgAjaxWatch.inprogress = false;
 101         if(wgAjaxWatch.timeoutID) {
 102                 window.clearTimeout(wgAjaxWatch.timeoutID);
 103         }
 104         // Bug 12395 - avoid some watch link confusion on edit
 105         var watchthis = document.getElementById("wpWatchthis");
 106         if( watchthis && response.match(/^<[uw]#>/) ) {
 107                 watchthis.checked = response.match(/^<w#>/) ? "checked" : "";
 108         }
 109         return;
 110 };
 111
 112 wgAjaxWatch.onLoad = function() {
 113         // This document structure hardcoding sucks.  We should make a class and
 114         // toss all this out the window.
 115         var el1 = document.getElementById("ca-unwatch");
 116         var el2 = null;
 117         if (!el1) {
 118                 el1 = document.getElementById("mw-unwatch-link1");
 119                 el2 = document.getElementById("mw-unwatch-link2");
 120         }
 121         if(el1) {
 122                 wgAjaxWatch.watching = true;
 123         } else {
 124                 wgAjaxWatch.watching = false;
 125                 el1 = document.getElementById("ca-watch");
 126                 if (!el1) {
 127                         el1 = document.getElementById("mw-watch-link1");
 128                         el2 = document.getElementById("mw-watch-link2");
 129                 }
 130                 if(!el1) {
 131                         wgAjaxWatch.supported = false;
 132                         return;
 133                 }
 134         }
 135
 136         // The id can be either for the parent (Monobook-based) or the element
 137         // itself (non-Monobook)
 138         wgAjaxWatch.watchLinks.push( el1.tagName.toLowerCase() == "a"
 139                 ? el1 : el1.firstChild );
 140
 141         if( el2 ) {
 142                 wgAjaxWatch.watchLinks.push( el2 );
 143         }
 144
 145         // I couldn't get for (watchLink in wgAjaxWatch.watchLinks) to work, if
 146         // you can be my guest.
 147         for( i = 0; i < wgAjaxWatch.watchLinks.length; i++ ) {
 148                 wgAjaxWatch.watchLinks[i].onclick = wgAjaxWatch.ajaxCall;
 149         }
 150         return;
 151 };
 152
 153 hookEvent("load", wgAjaxWatch.onLoad);