Use Object.keys/getOwnPropertyNames (and provide them if they don't exist).

common/content/autocommands.js

@@ -167,7 +167,7 @@ const AutoCommands = Module("autocommands", {
 
                 if (event) {
                     // NOTE: event can only be a comma separated list for |:au {event} {pat} {cmd}|
-                    let validEvents = keys(config.autocommands);
+                    let validEvents = Object.keys(config.autocommands);
                     validEvents.push("*");
 
                     events = event.split(",");
@@ -227,7 +227,7 @@ const AutoCommands = Module("autocommands", {
 
                     let [event, url] = args;
                     let defaultURL = url || buffer.URL;
-                    let validEvents = keys(config.autocommands);
+                    let validEvents = Object.keys(config.autocommands);
 
                     // TODO: add command validators
                     dactyl.assert(event != "*",

common/content/base.js

@@ -44,30 +44,34 @@ function allkeys(obj) {
     }
 }
 
-function keys(obj) {
-    if (modules.services) {
-        try {
-            let ret = {};
-            services.get("debugger").wrapValue(obj).getProperties(ret, {});
-            for (let prop in values(ret.value))
-                yield prop.name.stringValue;
-            return;
-        }
-        catch (e) {}
+function debuggerProperties(obj) {
+    if (modules.services && options["jsdebugger"]) {
+        let ret = {};
+        services.get("debugger").wrapValue(obj).getProperties(ret, {});
+        return ret.value;
+    }
+}
+
+if (!Object.keys)
+    Object.keys = function keys(obj) [k for (k in obj) if (obj.hasOwnProperty(k))];
+
+if (!Object.getOwnPropertyNames)
+    Object.getOwnPropertyNames = function getOwnPropertyNames(obj) {
+        let res = debuggerProperties(obj);
+        if (res)
+            return [prop.name.stringValue for (prop in values(res))];
+        return Object.keys(obj);
     }
 
-    if ("__iterator__" in obj) {
-        var iter = obj.__iterator__;
-        yield "__iterator__";
-        // This is dangerous, but necessary.
-        delete obj.__iterator__;
-    }
-    for (var k in obj)
-        if (obj.hasOwnProperty(k))
-            yield k;
-    if (iter !== undefined)
-        obj.__iterator__ = iter;
+function properties(obj, prototypes) {
+    let orig = obj;
+    let seen = {};
+    for (; obj; obj = prototypes && obj.__proto__)
+        for (let key in values(Object.getOwnPropertyNames(obj)))
+            if (!prototypes || !set.add(seen, key) && obj != orig)
+                yield key
 }
+
 function values(obj) {
     for (var k in obj)
         if (obj.hasOwnProperty(k))
@@ -273,7 +277,7 @@ function curry(fn, length, self, acc) {
 function update(target) {
     for (let i = 1; i < arguments.length; i++) {
         let src = arguments[i];
-        foreach(keys(src || {}), function (k) {
+        Object.getOwnPropertyNames(src || {}).forEach(function (k) {
             var get = src.__lookupGetter__(k),
                 set = src.__lookupSetter__(k);
             if (!get && !set) {

common/content/javascript.js

@@ -26,74 +26,39 @@ const JavaScript = Module("javascript", {
     // Some object members are only accessible as function calls
     getKey: function (obj, key) {
         try {
+            // if (!Object.prototype.__lookupGetter__.call(obj, key))
             return obj[key];
         }
-        catch (e) {
-            return undefined;
-        }
+        catch (e) {}
+        return undefined;
     },
 
     iter: function iter(obj, toplevel) {
         "use strict";
-        toplevel = !!toplevel;
-        let seen = {};
-        let ret = {};
+        const self = this;
 
         if(obj == null)
             return;
 
-        if(options["jsdebugger"]) {
-            let orig = obj;
-            let top = services.get("debugger").wrapValue(obj);
-
-            for (; obj; obj = !toplevel && obj.__proto__) {
-                services.get("debugger").wrapValue(obj).getProperties(ret, {});
-                for (let prop in values(ret.value)) {
-                    if (set.add(seen, prop.name.stringValue))
-                        continue;
-                    if (toplevel || obj !== orig)
-                        yield [prop.name.stringValue, top.getProperty(prop.name.stringValue).value.getWrappedValue()]
-                }
-            }
-            // The debugger doesn't list some properties. I can't guess why.
-            // This only lists ENUMERABLE properties.
-            try {
-                for (let k in orig)
-                    if (k in orig && !(set.has(seen, k))
-                        && Object.hasOwnProperty(orig, k) == toplevel)
-                        yield [k, this.getKey(orig, k)]
-            }
-            catch(e) {}
-        }
+        let orig = obj;
+        if(!options["jsdebugger"])
+            function value(key) self.getKey(orig, key);
         else {
-            for (let k in allkeys(obj))
-		    try {
-			if (Object.hasOwnProperty(obj, k) == toplevel)
-			    yield [k, this.getKey(obj, k)];
-                    }
-                    catch (e) {}
+            let top = services.get("debugger").wrapValue(obj);
+            function value(key) top.getProperty(key).value.getWrappedValue();
         }
+        for (let key in properties(obj, !toplevel))
+            yield [key, value(key)];
     },
 
-    // Search the object for strings starting with @key.
-    // If @last is defined, key is a quoted string, it's
-    // wrapped in @last after @offset characters are sliced
-    // off of it and it's quoted.
     objectKeys: function objectKeys(obj, toplevel) {
         // Things we can dereference
-        if (["object", "string", "function"].indexOf(typeof obj) == -1)
+        if (!obj || ["object", "string", "function"].indexOf(typeof obj) == -1)
             return [];
-        if (!obj)
+        if (modules.isPrototypeOf(obj) && !toplevel)
             return [];
 
-        let completions;
-        if (modules.isPrototypeOf(obj))
-            completions = [v for (v in Iterator(obj))];
-        else {
-            completions = [k for (k in this.iter(obj, toplevel))];
-            if (!toplevel)
-                completions = util.Array.uniq(completions, true);
-        }
+        let completions = [k for (k in this.iter(obj, toplevel))];
 
         // Add keys for sorting later.
         // Numbers are parsed to ints.
@@ -124,6 +89,7 @@ const JavaScript = Module("javascript", {
             return cache[key] = dactyl.eval(arg, context);
         }
         catch (e) {
+            this.context.message = "Error: " + e;
             return null;
         }
         finally {

common/content/modes.js

@@ -158,7 +158,7 @@ const Modes = Module("modes", {
 
     getCharModes: function (chr) [m for (m in values(this._modeMap)) if (m.char == chr)],
 
-    matchModes: function (obj) [m for (m in values(this._modeMap)) if (array(keys(obj)).every(function (k) obj[k] == (m[k] || false)))],
+    matchModes: function (obj) [m for (m in values(this._modeMap)) if (Object.keys(obj).every(function (k) obj[k] == (m[k] || false)))],
 
     // show the current mode string in the command line
     show: function () {

common/content/modules.js

@@ -104,7 +104,7 @@ window.addEventListener("load", function () {
                         dactyl.reportError(e);
                 }
             }
-            for (let mod in keys(module.INIT)) {
+            for (let mod in values(Object.keys(module.INIT))) {
                 deferredInit[mod] = deferredInit[mod] || [];
                 deferredInit[mod].push(init(mod, module));
             }