Remove our custom hashmap implementation

gjs uses Spidermonkey 24, which implements Map from the ES6
specification, so we can use that instead.

https://bugzilla.gnome.org/show_bug.cgi?id=722210

js/js-resources.gresource.xml

@@ -15,7 +15,6 @@
     <file>misc/extensionUtils.js</file>
     <file>misc/fileUtils.js</file>
     <file>misc/gnomeSession.js</file>
-    <file>misc/hash.js</file>
     <file>misc/history.js</file>
     <file>misc/jsParse.js</file>
     <file>misc/loginManager.js</file>

js/misc/hash.js

@@ -1,144 +0,0 @@
-// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
-
-const Lang = imports.lang;
-const System = imports.system;
-
-const Params = imports.misc.params;
-
-// This is an implementation of EcmaScript SameValue algorithm,
-// which returns true if two values are not observably distinguishable.
-// It was taken from http://wiki.ecmascript.org/doku.php?id=harmony:egal
-//
-// In the future, we may want to use the 'is' operator instead.
-function _sameValue(x, y) {
-    if (x === y) {
-        // 0 === -0, but they are not identical
-        return x !== 0 || 1 / x === 1 / y;
-    }
-
-    // NaN !== NaN, but they are identical.
-    // NaNs are the only non-reflexive value, i.e., if x !== x,
-    // then x is a NaN.
-    // isNaN is broken: it converts its argument to number, so
-    // isNaN("foo") => true
-    return x !== x && y !== y;
-}
-
-const _hashers = {
-    object: function(o) { return o ? System.addressOf(o) : 'null'; },
-    function: function(f) { return System.addressOf(f); },
-    string: function(s) { return s; },
-    number: function(n) { return String(n); },
-    undefined: function() { return 'undefined'; },
-};
-
-/* Map is meant to be similar in usage to ES6 Map, which is
-   described at http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets,
-   without requiring more than ES5 + Gjs extensions.
-
-   Known differences from other implementations:
-   Polyfills around the web usually implement HashMaps for
-   primitive values and reversed WeakMaps for object keys,
-   but we want real maps with real O(1) semantics in all cases,
-   and the easiest way is to have different hashers for different
-   types.
-
-   Known differences from the ES6 specification:
-   - Map is a Lang.Class, not a ES6 class, so inheritance,
-     prototype, sealing, etc. work differently.
-   - items(), keys() and values() don't return iterators,
-     they return actual arrays, so they incur a full copy everytime
-     they're called, and they don't see changes if you mutate
-     the table while iterating
-     (admittedly, the ES6 spec is a bit unclear on this, and
-     the reference code would just blow up)
-*/
-const Map = new Lang.Class({
-    Name: 'Map',
-
-    _init: function(iterable) {
-        this._pool = { };
-        this._size = 0;
-
-        if (iterable) {
-            for (let i = 0; i < iterable.length; i++) {
-                let [key, value] = iterable[i];
-                this.set(key, value);
-            }
-        }
-    },
-
-    _hashKey: function(key) {
-        let type = typeof(key);
-        return type + ':' + _hashers[type](key);
-    },
-
-    _internalGet: function(key) {
-        let hash = this._hashKey(key);
-        let node = this._pool[hash];
-
-        if (node && _sameValue(node.key, key))
-            return [true, node.value];
-        else
-            return [false, null];
-    },
-
-    get: function(key) {
-        return this._internalGet(key)[1];
-    },
-
-    has: function(key) {
-        return this._internalGet(key)[0];
-    },
-
-    set: function(key, value) {
-        let hash = this._hashKey(key);
-        let node = this._pool[hash];
-
-        if (node) {
-            node.key = key;
-            node.value = value;
-        } else {
-            this._pool[hash] = { key: key, value: value };
-            this._size++;
-        }
-    },
-
-    delete: function(key) {
-        let hash = this._hashKey(key);
-        let node = this._pool[hash];
-
-        if (node && _sameValue(node.key, key)) {
-            delete this._pool[hash];
-            this._size--;
-            return [node.key, node.value];
-        } else {
-            return [null, null];
-        }
-    },
-
-    keys: function() {
-        let pool = this._pool;
-        return Object.getOwnPropertyNames(pool).map(function(hash) {
-            return pool[hash].key;
-        });
-    },
-
-    values: function() {
-        let pool = this._pool;
-        return Object.getOwnPropertyNames(pool).map(function(hash) {
-            return pool[hash].value;
-        });
-    },
-
-    items: function() {
-        let pool = this._pool;
-        return Object.getOwnPropertyNames(pool).map(function(hash) {
-            return [pool[hash].key, pool[hash].value];
-        });
-    },
-
-    size: function() {
-        return this._size;
-    },
-});

js/ui/messageTray.js

@@ -19,7 +19,6 @@ const BoxPointer = imports.ui.boxpointer;
 const CtrlAltTab = imports.ui.ctrlAltTab;
 const GnomeSession = imports.misc.gnomeSession;
 const GrabHelper = imports.ui.grabHelper;
-const Hash = imports.misc.hash;
 const Lightbox = imports.ui.lightbox;
 const Main = imports.ui.main;
 const PointerWatcher = imports.ui.pointerWatcher;
@@ -1899,7 +1898,7 @@ const MessageTray = new Lang.Class({
                               Shell.KeyBindingMode.OVERVIEW,
                               Lang.bind(this, this._expandActiveNotification));
 
-        this._sources = new Hash.Map();
+        this._sources = new Map();
         this._chatSummaryItemsCount = 0;
 
         this._trayDwellTimeoutId = 0;
@@ -1936,7 +1935,7 @@ const MessageTray = new Lang.Class({
     },
 
     _updateNoMessagesLabel: function() {
-        this._noMessages.visible = this._sources.size() == 0;
+        this._noMessages.visible = this._sources.size == 0;
     },
 
     _sessionUpdated: function() {
@@ -2099,7 +2098,8 @@ const MessageTray = new Lang.Class({
     },
 
     _removeSource: function(source) {
-        let [, obj] = this._sources.delete(source);
+        let obj = this._sources.get(source);
+        this._sources.delete(source);
         let summaryItem = obj.summaryItem;
 
         if (source.isChat)
@@ -2120,7 +2120,7 @@ const MessageTray = new Lang.Class({
     },
 
     getSources: function() {
-        return this._sources.keys();
+        return [k for (k of this._sources.keys())];
     },
 
     _onSourceEnableChanged: function(policy, source) {

js/ui/screenShield.js

@@ -17,7 +17,6 @@ const TweenerEquations = imports.tweener.equations;
 
 const Background = imports.ui.background;
 const GnomeSession = imports.misc.gnomeSession;
-const Hash = imports.misc.hash;
 const Layout = imports.ui.layout;
 const OVirt = imports.gdm.oVirt;
 const LoginManager = imports.misc.loginManager;
@@ -115,7 +114,7 @@ const NotificationsBox = new Lang.Class({
         this.actor.add(this._musicBin);
         this.actor.add(this._scrollView, { x_fill: true, x_align: St.Align.START });
 
-        this._sources = new Hash.Map();
+        this._sources = new Map();
         Main.messageTray.getSources().forEach(Lang.bind(this, function(source) {
             this._sourceAdded(Main.messageTray, source, true);
         }));
@@ -130,9 +129,8 @@ const NotificationsBox = new Lang.Class({
             this._sourceAddedId = 0;
         }
 
-        let items = this._sources.items();
+        let items = this._sources.entries();
-        for (let i = 0; i < items.length; i++) {
+        for (let [source, obj] of items) {
-            let [source, obj] = items[i];
             this._removeSource(source, obj);
         }
 

js/ui/screencast.js

@@ -6,7 +6,6 @@ const Lang = imports.lang;
 const Shell = imports.gi.Shell;
 const Signals = imports.signals;
 
-const Hash = imports.misc.hash;
 const Main = imports.ui.main;
 
 const ScreencastIface = '<node> \
@@ -42,13 +41,13 @@ const ScreencastService = new Lang.Class({
 
         Gio.DBus.session.own_name('org.gnome.Shell.Screencast', Gio.BusNameOwnerFlags.REPLACE, null, null);
 
-        this._recorders = new Hash.Map();
+        this._recorders = new Map();
 
         Main.sessionMode.connect('updated', Lang.bind(this, this._sessionUpdated));
     },
 
     get isRecording() {
-        return this._recorders.size() > 0;
+        return this._recorders.size > 0;
     },
 
     _ensureRecorderForSender: function(sender) {
@@ -69,8 +68,7 @@ const ScreencastService = new Lang.Class({
         if (Main.sessionMode.allowScreencast)
             return;
 
-        for (let sender in this._recorders.keys())
+        this._recorders.clear();
-            this._recorders.delete(sender);
         this.emit('updated');
     },
 

js/ui/shellDBus.js

@@ -10,7 +10,6 @@ const Config = imports.misc.config;
 const ExtensionSystem = imports.ui.extensionSystem;
 const ExtensionDownloader = imports.ui.extensionDownloader;
 const ExtensionUtils = imports.misc.extensionUtils;
-const Hash = imports.misc.hash;
 const Main = imports.ui.main;
 const Screenshot = imports.ui.screenshot;
 const ViewSelector = imports.ui.viewSelector;
@@ -83,8 +82,8 @@ const GnomeShell = new Lang.Class({
         this._extensionsService = new GnomeShellExtensions();
         this._screenshotService = new Screenshot.ScreenshotService();
 
-        this._grabbedAccelerators = new Hash.Map();
+        this._grabbedAccelerators = new Map();
-        this._grabbers = new Hash.Map();
+        this._grabbers = new Map();
 
         global.display.connect('accelerator-activated', Lang.bind(this,
             function(display, action, deviceid, timestamp) {
@@ -228,9 +227,8 @@ const GnomeShell = new Lang.Class({
     },
 
     _onGrabberBusNameVanished: function(connection, name) {
-        let grabs = this._grabbedAccelerators.items();
+        let grabs = this._grabbedAccelerators.entries();
-        for (let i = 0; i < grabs.length; i++) {
+        for (let [action, sender] of grabs) {
-            let [action, sender] = grabs[i];
             if (sender == name)
                 this._ungrabAccelerator(action);
         }

js/ui/status/network.js

@@ -11,7 +11,6 @@ const NMGtk = imports.gi.NMGtk;
 const Signals = imports.signals;
 const St = imports.gi.St;
 
-const Hash = imports.misc.hash;
 const Main = imports.ui.main;
 const PanelMenu = imports.ui.panelMenu;
 const PopupMenu = imports.ui.popupMenu;
@@ -176,7 +175,7 @@ const NMConnectionSection = new Lang.Class({
     _init: function(client) {
         this._client = client;
 
-        this._connectionItems = new Hash.Map();
+        this._connectionItems = new Map();
         this._connections = [];
 
         this._labelSection = new PopupMenu.PopupMenuSection();
@@ -194,7 +193,7 @@ const NMConnectionSection = new Lang.Class({
     },
 
     _sync: function() {
-        let nItems = this._connectionItems.size();
+        let nItems = this._connectionItems.size;
 
         this._switchSection.actor.visible = (nItems > 1);
         this._labelSection.actor.visible = (nItems == 1);
@@ -213,8 +212,7 @@ const NMConnectionSection = new Lang.Class({
 
     _getStatus: function() {
         let values = this._connectionItems.values();
-        for (let i = 0; i < values.length; i++) {
+        for (let item of values) {
-            let item = values[i];
             if (item.isActive())
                 return item.getName();
         }
@@ -365,7 +363,7 @@ const NMConnectionDevice = new Lang.Class({
     },
 
     _sync: function() {
-        let nItems = this._connectionItems.size();
+        let nItems = this._connectionItems.size;
         this._autoConnectItem.actor.visible = (nItems == 0);
         this.parent();
     },
@@ -1217,7 +1215,7 @@ const NMVPNSection = new Lang.Class({
     },
 
     _sync: function() {
-        let nItems = this._connectionItems.size();
+        let nItems = this._connectionItems.size;
         this.item.actor.visible = (nItems > 0);
         this.parent();
     },
@@ -1239,9 +1237,10 @@ const NMVPNSection = new Lang.Class({
     },
 
     setActiveConnections: function(vpnConnections) {
-        this._connectionItems.values().forEach(function(item) {
+        let connections = this._connectionItems.values();
+        for (let item of connections) {
             item.setActiveConnection(null);
-        });
+        }
         vpnConnections.forEach(Lang.bind(this, function(a) {
             let item = this._connectionItems.get(a._connection.get_uuid());
             item.setActiveConnection(a);
@@ -1254,8 +1253,7 @@ const NMVPNSection = new Lang.Class({
 
     getIndicatorIcon: function() {
         let items = this._connectionItems.values();
-        for (let i = 0; i < items.length; i++) {
+        for (let item of items) {
-            let item = items[i];
             let icon = item.getIndicatorIcon();
             if (icon)
                 return icon;