adding kangax's detect-global.js

test/detect-global.js

@@ -0,0 +1,129 @@
+(function () {
+    function getPropertyDescriptors(object) {
+      var props = { };
+      for (var prop in object) {
+        props[prop] = {
+          type: typeof object[prop],
+          value: object[prop]
+        }
+      }
+      return props;
+    }
+
+    function getCleanWindow() {
+      var elIframe = document.createElement('iframe');
+      elIframe.style.display = 'none';
+      document.body.appendChild(elIframe);
+      elIframe.src = 'about:blank';
+      return elIframe.contentWindow;
+    }
+
+    function appendControl(el, name) {
+      var elCheckbox = document.createElement('input');
+      elCheckbox.type = 'checkbox';
+      elCheckbox.checked = true;
+      elCheckbox.id = '__' + name;
+
+      var elLabel = document.createElement('label');
+      elLabel.htmlFor = '__' + name;
+      elLabel.innerHTML = 'Exclude ' + name + ' properties?';
+      elLabel.style.marginLeft = '0.5em';
+
+      var elWrapper = document.createElement('p');
+      elWrapper.style.marginBottom = '0.5em';
+
+      elWrapper.appendChild(elCheckbox);
+      elWrapper.appendChild(elLabel);
+
+      el.appendChild(elWrapper);
+    }
+
+    function appendAnalyze(el) {
+      var elAnalyze = document.createElement('button');
+      elAnalyze.id = '__analyze';
+      elAnalyze.innerHTML = 'Analyze';
+      elAnalyze.style.marginTop = '1em';
+      el.appendChild(elAnalyze);
+    }
+
+    function appendCancel(el) {
+      var elCancel = document.createElement('a');
+      elCancel.href = '#';
+      elCancel.innerHTML = 'Cancel';
+      elCancel.style.cssText = 'color:#eee;margin-left:0.5em;';
+      elCancel.onclick = function() {
+        el.parentNode.removeChild(el);
+        return false; 
+      };
+      el.appendChild(elCancel);
+    }
+
+    function initConfigPopup() {
+      var el = document.createElement('div');
+
+      el.style.cssText =  'position:fixed; left:10px; top:10px; width:300px; background:rgba(50,50,50,0.9);' +
+                          '-moz-border-radius:10px; padding:1em; color: #eee; text-align: left;' +
+                          'font-family: "Helvetica Neue", Verdana, Arial, sans serif; z-index: 99999;';
+
+      for (var prop in propSets) {
+        appendControl(el, prop);
+      }
+
+      appendAnalyze(el);
+      appendCancel(el);
+
+      document.body.appendChild(el);
+    }
+
+    function getPropsCount(object) {
+      var count = 0;
+      for (var prop in object) {
+        count++;
+      }
+      return count;
+    }
+
+    function shouldDeleteProperty(propToCheck) {
+      for (var prop in propSets) {
+        var elCheckbox = document.getElementById('__' + prop);
+        var isPropInSet = propSets[prop].indexOf(propToCheck) > -1;
+        if (elCheckbox.checked && isPropInSet) {
+          return true;
+        }
+      }
+    }
+
+    function analyze() {
+      var global = (function(){ return this; })(),
+          globalProps = getPropertyDescriptors(global),
+          cleanWindow = getCleanWindow();
+
+      for (var prop in cleanWindow) {
+        if (globalProps[prop]) {
+          delete globalProps[prop];
+        }
+      }
+      for (var prop in globalProps) {
+        if (shouldDeleteProperty(prop)) {
+          delete globalProps[prop];
+        }
+      }
+
+      console.dir(globalProps);
+      console.log('Total number of properties: ' + getPropsCount(globalProps));
+    }
+
+    var propSets = {
+      'Prototype':        '$$ $A $F $H $R $break $continue $w Abstract Ajax Class Enumerable Element Field Form ' +
+                          'Hash Insertion ObjectRange PeriodicalExecuter Position Prototype Selector Template Toggle Try'.split(' '),
+
+      'Scriptaculous':    'Autocompleter Builder Control Draggable Draggables Droppables Effect Sortable SortableObserver Sound Scriptaculous'.split(' '),
+      'Firebug':          'loadFirebugConsole console _getFirebugConsoleElement _FirebugConsole _FirebugCommandLine _firebug'.split(' '),
+      'Mozilla':          'Components XPCNativeWrapper XPCSafeJSObjectWrapper getInterface netscape GetWeakReference'.split(' '),
+      'GoogleAnalytics':  'gaJsHost gaGlobal _gat _gaq pageTracker'.split(' ')
+    };
+
+    initConfigPopup();
+
+    document.getElementById('__analyze').onclick = analyze;
+})();