Fixed #47

8 files changed, 88 insertions, 36 deletions

diff --git a/blocks.js b/blocks.js
index 061e176..b6ce68a 100644
--- a/blocks.js
+++ b/blocks.js
@@ -5629,7 +5629,7 @@ InputSlotMorph.prototype.dropDownMenu = function () {
     }
     menu.addItem(' ', null);
     for (key in choices) {
-        if (choices.hasOwnProperty(key)) {
+        if (Object.prototype.hasOwnProperty.call(choices, key)) {
             if (key[0] === '~') {
                 menu.addLine();
             } else {
diff --git a/gui.js b/gui.js
index d4320f2..e0c5659 100644
--- a/gui.js
+++ b/gui.js
@@ -2079,7 +2079,7 @@ IDE_Morph.prototype.aboutSnap = function () {
         + '\nJoe Otto: Morphic Testing and Debugging';
 
     for (module in modules) {
-        if (modules.hasOwnProperty(module)) {
+        if (Object.prototype.hasOwnProperty.call(modules, module)) {
             versions += ('\n' + module + ' (' +
                             modules[module] + ')');
         }
@@ -3814,7 +3814,7 @@ ProjectDialogMorph.prototype.getLocalProjectList = function () {
     var stored, name, dta,
         projects = [];
     for (stored in localStorage) {
-        if (localStorage.hasOwnProperty(stored)
+        if (Object.prototype.hasOwnProperty.call(localStorage, stored)
                 && stored.substr(0, 14) === '-snap-project-') {
             name = stored.substr(14);
             dta = {
diff --git a/locale.js b/locale.js
index 11bbe92..fa71c08 100644
--- a/locale.js
+++ b/locale.js
@@ -61,13 +61,16 @@ function Localizer(language, dict) {
 }
 
 Localizer.prototype.translate = function (string) {
-    return this.dict[this.language][string] || string;
+    return Object.prototype.hasOwnProperty.call(
+        this.dict[this.language],
+        string
+    ) ? this.dict[this.language][string] || string;
 };
 
 Localizer.prototype.languages = function () {
     var property, arr = [];
     for (property in this.dict) {
-        if (this.dict.hasOwnProperty(property)) {
+        if (Object.prototype.hasOwnProperty.call(this.dict, property)) {
             arr.push(property);
         }
     }
@@ -100,7 +103,8 @@ Localizer.prototype.unload = function () {
         if (lang !== 'en') {
             dict = myself.dict[lang];
             for (key in dict) {
-                if (dict.hasOwnProperty(key) && !contains(keep, key)) {
+                if (Object.prototype.hasOwnProperty.call(dict, key)
+                        && !contains(keep, key)) {
                     delete dict[key];
                 }
             }
diff --git a/morphic.js b/morphic.js
index 86f6f39..3480cfa 100644
--- a/morphic.js
+++ b/morphic.js
@@ -1114,7 +1114,7 @@ function sizeOf(object) {
     // answer the number of own properties
     var size = 0, key;
     for (key in object) {
-        if (object.hasOwnProperty(key)) {
+        if (Object.prototype.hasOwnProperty.call(object, key)) {
             size += 1;
         }
     }
@@ -1251,7 +1251,7 @@ function copy(target) {
             target.constructor !== Object) {
         c = clone(target.constructor.prototype);
         for (property in target) {
-            if (target.hasOwnProperty(property)) {
+            if (Object.prototype.hasOwnProperty.call(target, property)) {
                 c[property] = target[property];
             }
         }
@@ -6202,7 +6202,10 @@ InspectorMorph.prototype.buildPanes = function () {
                     [ // format element: [color, predicate(element]
                         new Color(0, 0, 180),
                         function (element) {
-                            return myself.target.hasOwnProperty(element);
+                            return Object.prototype.hasOwnProperty.call(
+                                myself.target,
+                                element
+                            );
                         }
                     ]
                 ]
@@ -9579,7 +9582,10 @@ HandMorph.prototype.processMouseScroll = function (event) {
     if (morph) {
         morph.mouseScroll(
             (event.detail / -3) || (
-                event.hasOwnProperty('wheelDeltaY') ?
+                Object.prototype.hasOwnProperty.call(
+                    event,
+                    'wheelDeltaY'
+                ) ?
                         event.wheelDeltaY / 120 :
                         event.wheelDelta / 120
             ),
@@ -10499,7 +10505,7 @@ WorldMorph.prototype.about = function () {
     var versions = '', module;
 
     for (module in modules) {
-        if (modules.hasOwnProperty(module)) {
+        if (Object.prototype.hasOwnProperty.call(modules, module)) {
             versions += ('\n' + module + ' (' + modules[module] + ')');
         }
     }
diff --git a/store.js b/store.js
index bbf2a70..ac88ae4 100644
--- a/store.js
+++ b/store.js
@@ -319,7 +319,8 @@ SnapSerializer.prototype.loadProjectModel = function (xmlNode) {
     if (!project.name) {
         nameID = 1;
         while (
-            localStorage.hasOwnProperty(
+            Object.prototype.hasOwnProperty.call(
+                localStorage,
                 '-snap-project-Untitled ' + nameID
             )
         ) {
@@ -339,7 +340,10 @@ SnapSerializer.prototype.loadProjectModel = function (xmlNode) {
     model.stage = model.project.require('stage');
     StageMorph.prototype.frameRate = 0;
     project.stage = new StageMorph(project.globalVariables);
-    if (model.stage.attributes.hasOwnProperty('id')) {
+    if (Object.prototype.hasOwnProperty.call(
+            model.stage.attributes,
+            'id'
+        )) {
         this.objects[model.stage.attributes.id] = project.stage;
     }
     if (model.stage.attributes.name) {
@@ -399,17 +403,24 @@ SnapSerializer.prototype.loadProjectModel = function (xmlNode) {
         var watcher, color, target, hidden, extX, extY;
 
         color = myself.loadColor(model.attributes.color);
-        target = model.attributes.hasOwnProperty('scope') ?
-                project.sprites[model.attributes.scope] : null;
+        target = Object.prototype.hasOwnProperty.call(
+            model.attributes,
+            'scope'
+        ) ? project.sprites[model.attributes.scope] : null;
 
         // determine whether the watcher is hidden, slightly
         // complicated to retain backward compatibility
         // with former tag format: hidden="hidden"
         // now it's: hidden="true"
-        hidden = model.attributes.hasOwnProperty('hidden')
-            && (model.attributes.hidden !== 'false');
+        hidden = Object.prototype.hasOwnProperty.call(
+            model.attributes,
+            'hidden'
+        ) && (model.attributes.hidden !== 'false');
 
-        if (model.attributes.hasOwnProperty('var')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'var'
+            )) {
             watcher = new WatcherMorph(
                 model.attributes['var'],
                 color,
@@ -584,7 +595,10 @@ SnapSerializer.prototype.loadCostumes = function (object, model) {
     if (costumes) {
         object.costumes = this.loadValue(costumes.require('list'));
     }
-    if (model.attributes.hasOwnProperty('costume')) {
+    if (Object.prototype.hasOwnProperty.call(
+            model.attributes,
+            'costume'
+        )) {
         costume = object.costumes.asArray()[model.attributes.costume - 1];
         if (costume) {
             if (costume.loaded) {
@@ -807,7 +821,10 @@ SnapSerializer.prototype.loadBlock = function (model, isReporter) {
     // private
     var block, info, inputs, isGlobal, rm, receiver;
     if (model.tag === 'block') {
-        if (model.attributes.hasOwnProperty('var')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'var'
+            )) {
             return SpriteMorph.prototype.variableBlock(
                 model.attributes['var']
             );
@@ -930,19 +947,28 @@ SnapSerializer.prototype.loadValue = function (model) {
         myself = this;
 
     function record() {
-        if (model.attributes.hasOwnProperty('id')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'id'
+            )) {
             myself.objects[model.attributes.id] = v;
         }
-        if (model.attributes.hasOwnProperty('mediaID')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'mediaID'
+            )) {
             myself.mediaDict[model.attributes.mediaID] = v;
         }
     }
     switch (model.tag) {
     case 'ref':
-        if (model.attributes.hasOwnProperty('id')) {
+        if (Object.prototype.hasOwnProperty.call(model.attributes, 'id')) {
             return this.objects[model.attributes.id];
         }
-        if (model.attributes.hasOwnProperty('mediaID')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'mediaID'
+            )) {
             return this.mediaDict[model.attributes.mediaID];
         }
         throw new Error('expecting a reference id');
@@ -1060,16 +1086,28 @@ SnapSerializer.prototype.loadValue = function (model) {
         return v;
     case 'costume':
         center = new Point();
-        if (model.attributes.hasOwnProperty('center-x')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'center-x'
+            )) {
             center.x = parseFloat(model.attributes['center-x']);
         }
-        if (model.attributes.hasOwnProperty('center-y')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'center-y'
+            )) {
             center.y = parseFloat(model.attributes['center-y']);
         }
-        if (model.attributes.hasOwnProperty('name')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'name'
+            )) {
             name = model.attributes.name;
         }
-        if (model.attributes.hasOwnProperty('image')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'image'
+            )) {
             image = new Image();
             if (model.attributes.image.indexOf('data:image/svg+xml') === 0
                     && !MorphicPreferences.rasterizeSVGs) {
@@ -1108,7 +1146,10 @@ SnapSerializer.prototype.loadValue = function (model) {
         audio = new Audio();
         audio.src = model.attributes.sound;
         v = new Sound(audio, model.attributes.name);
-        if (model.attributes.hasOwnProperty('mediaID')) {
+        if (Object.prototype.hasOwnProperty.call(
+                model.attributes,
+                'mediaID'
+            )) {
             myself.mediaDict[model.attributes.mediaID] = v;
         }
         return v;
diff --git a/threads.js b/threads.js
index 958a270..f5ba28f 100644
--- a/threads.js
+++ b/threads.js
@@ -1821,10 +1821,10 @@ Process.prototype.reportIsIdentical = function (a, b) {
     }
 
     function clear() {
-        if (a.hasOwnProperty(tag)) {
+        if (Object.prototype.hasOwnProperty.call(a, tag)) {
             delete a[tag];
         }
-        if (b.hasOwnProperty(tag)) {
+        if (Object.prototype.hasOwnProperty.call(b, tag)) {
             delete b[tag];
         }
     }
@@ -2710,7 +2710,7 @@ VariableFrame.prototype.deleteVar = function (name) {
 VariableFrame.prototype.names = function () {
     var each, names = [];
     for (each in this.vars) {
-        if (this.vars.hasOwnProperty(each)) {
+        if (Object.prototype.hasOwnProperty.call(this.vars, each)) {
             names.push(each);
         }
     }
@@ -2723,7 +2723,7 @@ VariableFrame.prototype.allNamesDict = function () {
     function addKeysToDict(srcDict, trgtDict) {
         var eachKey;
         for (eachKey in srcDict) {
-            if (srcDict.hasOwnProperty(eachKey)) {
+            if (Object.prototype.hasOwnProperty.call(srcDict, eachKey)) {
                 trgtDict[eachKey] = eachKey;
             }
         }
@@ -2744,7 +2744,7 @@ VariableFrame.prototype.allNames = function () {
     var answer = [], each, dict = this.allNamesDict();
 
     for (each in dict) {
-        if (dict.hasOwnProperty(each)) {
+        if (Object.prototype.hasOwnProperty.call(dict, each)) {
             answer.push(each);
         }
     }
diff --git a/widgets.js b/widgets.js
index dbeeefc..cdd775c 100644
--- a/widgets.js
+++ b/widgets.js
@@ -2776,7 +2776,7 @@ InputFieldMorph.prototype.dropDownMenu = function () {
     }
     menu.addItem(' ', null);
     for (key in choices) {
-        if (choices.hasOwnProperty(key)) {
+        if (Object.prototype.hasOwnProperty.call(choices, key)) {
             if (key[0] === '~') {
                 menu.addLine();
             } else {
diff --git a/xml.js b/xml.js
index 877fff7..88ffd6d 100644
--- a/xml.js
+++ b/xml.js
@@ -246,7 +246,8 @@ XML_Element.prototype.toString = function (isFormatted, indentationLevel) {
 
     // attributes, if any
     for (key in this.attributes) {
-        if (this.attributes.hasOwnProperty(key) && this.attributes[key]) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, key)
+                && this.attributes[key]) {
             result += ' ' + key + '="' + this.attributes[key] + '"';
         }
     }