Reference Universe widget MKWS-156

[mkws-moved-to-github.git] / src / mkws-core.js

diff --git a/src/mkws-core.js b/src/mkws-core.js
index 87070f8..c7c2863 100644 (file)
--- a/src/mkws-core.js
+++ b/src/mkws-core.js
@@ -311,6 +311,7 @@ mkws.pagerNext = function(tname) {
 // wrapper to call team() after page load
 (function(j) {
   var log = mkws.log;
+  var $ = j; // XXX
 
   function handleNodeWithTeam(node, callback) {
     // First branch for DOM objects; second branch for jQuery objects
@@ -427,11 +428,42 @@ mkws.pagerNext = function(tname) {
   }
 
 
+  function selectorForAllWidgets() {
+    if (mkws.config && mkws.config.scan_all_nodes) {
+      // This is the old version, which works by telling jQuery to
+      // find every node that has a class beginning with "mkws". In
+      // theory it should be slower than the class-based selector; but
+      // instrumentation suprisnigly shows this is consistently
+      // faster. It also has the advantage that any widgets of
+      // non-registered types are logged as warnings rather than
+      // silently ignored.
+      return '[class^="mkws"],[class*=" mkws"]';
+    } else {
+      // This is the new version, which works by looking up the
+      // specific classes of all registered widget types. Because all
+      // it requires jQuery to do is some hash lookups in pre-built
+      // tables, it should be very fast; but it silently ignores
+      // widgets of unregistered types.
+      var s = "";
+      for (var type in mkws.widgetType2function) {
+       if (s) s += ',';
+       s += '.mkws' + type;
+      }
+      return s;
+    }
+  }
+
+
   function makeWidgetsWithin(level, node) {
-    node.find('[class^="mkws"],[class*=" mkws"]').each(function() {
+    node.find(selectorForAllWidgets()).each(function() {
       handleNodeWithTeam(this, function(tname, type) {
-        var oldHTML = this.innerHTML;
         var myTeam = mkws.teams[tname];
+        if (!myTeam) {
+          myTeam = mkws.teams[tname] = team(j, tname);
+          log("Made MKWS team '" + tname + "'");
+        }
+
+        var oldHTML = this.innerHTML;
         var myWidget = widget(j, myTeam, type, this);
         myTeam.addWidget(myWidget);
         var newHTML = this.innerHTML;
@@ -444,7 +476,8 @@ mkws.pagerNext = function(tname) {
   }
 
 
-  $(document).ready(function() {
+  function init(rootsel) {
+    if (!rootsel) var rootsel = ':root';
     var saved_config;
     if (typeof mkws_config === 'undefined') {
       log("setting empty config");
@@ -508,21 +541,10 @@ mkws.pagerNext = function(tname) {
       }
     }
 
-    // Find all nodes with an MKWS class, and determine their team from
-    // the mkwsTeam_* class. Make all team objects.
     var then = $.now();
-    $('[class^="mkws"],[class*=" mkws"]').each(function() {
-      handleNodeWithTeam(this, function(tname, type) {
-        if (!mkws.teams[tname]) {
-          mkws.teams[tname] = team(j, tname);
-          log("Made MKWS team '" + tname + "'");
-        }
-      });
-    });
-
-    makeWidgetsWithin(1, $(':root'));
-    
+    makeWidgetsWithin(1, $(rootsel));
     var now = $.now();
+
     log("Walking MKWS nodes took " + (now-then) + " ms");
 
     /*
@@ -543,5 +565,9 @@ mkws.pagerNext = function(tname) {
       // raw pp2
       runAutoSearches();
     }
+  };
+  $(document).ready(function() {
+    var widgetSelector = selectorForAllWidgets();
+    if (widgetSelector && $(widgetSelector).length !== 0) init();
   });
 })(jQuery);