Make further use of default parameters.

--HG--
extra : rebase_source : ab666bce7ed7e47c8f1e2bc4145f553da990d319

common/content/bookmarks.js

@@ -628,10 +628,10 @@ var Bookmarks = Module("bookmarks", {
     },
 
     completion: function initCompletion() {
-        completion.bookmark = function bookmark(context, tags, extra) {
+        completion.bookmark = function bookmark(context, tags, extra = {}) {
             context.title = ["Bookmark", "Title"];
             context.format = bookmarks.format;
-            iter(extra || {}).forEach(function ([k, v]) {
+            iter(extra).forEach(function ([k, v]) {
                 if (v != null)
                     context.filters.push(function (item) item.item[k] != null && this.matchString(v, item.item[k]));
             });

common/content/commandline.js

@@ -866,9 +866,7 @@ var CommandLine = Module("commandline", {
      * @... {string} default - The initial value that will be returned
      *     if the user presses <CR> straightaway. @default ""
      */
-    input: function _input(prompt, callback, extra) {
-        extra = extra || {};
-
+    input: function _input(prompt, callback, extra = {}) {
         CommandPromptMode(prompt, update({ onSubmit: callback }, extra)).open();
     },
 
@@ -1396,10 +1394,8 @@ var CommandLine = Module("commandline", {
          *      @default {@link #selected}
          * @returns {object}
          */
-        getItem: function getItem(tuple) {
-            tuple = tuple || this.selected;
-            return tuple && tuple[0] && tuple[0].items[tuple[1]];
-        },
+        getItem: function getItem(tuple = this.selected)
+            tuple && tuple[0] && tuple[0].items[tuple[1]],
 
         /**
          * Returns a tuple representing the next item, at the given
@@ -1510,11 +1506,10 @@ var CommandLine = Module("commandline", {
          *      @default 1
          * @param {boolean} fromTab If true, this function was
          *      called by {@link #tab}.
+         *      @default false
          *      @private
          */
-        select: function select(idx, count, fromTab) {
-            count = count || 1;
-
+        select: function select(idx, count = 1, fromTab = false) {
             switch (idx) {
             case this.UP:
             case this.DOWN:

common/content/dactyl.js

@@ -538,13 +538,11 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
      * @param {boolean} silent Whether the command should be echoed on the
      *     command line.
      */
-    execute: function execute(str, modifiers, silent) {
+    execute: function execute(str, modifiers = {}, silent = false) {
         // skip comments and blank lines
         if (/^\s*("|$)/.test(str))
             return;
 
-        modifiers = modifiers || {};
-
         if (!silent)
             commands.lastCommand = str.replace(/^\s*:\s*/, "");
         let res = true;
@@ -892,7 +890,7 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
      *     tabs.
      * @returns {boolean}
      */
-    open: function open(urls, params, force) {
+    open: function open(urls, params = {}, force = false) {
         if (typeof urls == "string")
             urls = dactyl.parseURLs(urls);
 
@@ -903,7 +901,6 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
                         dactyl.open(urls, params, true);
                 });
 
-        params = params || {};
         if (isString(params))
             params = { where: params };
 
@@ -1187,8 +1184,7 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
             return [];
         }
     },
-    wrapCallback: function wrapCallback(callback, self) {
-        self = self || this;
+    wrapCallback: function wrapCallback(callback, self = this) {
         let save = ["forceOpen"];
         let saved = save.map(p => dactyl[p]);
         return function wrappedCallback() {

common/content/events.js

@@ -212,8 +212,7 @@ var Events = Module("events", {
     /**
      * Wraps an event listener to ensure that errors are reported.
      */
-    wrapListener: function wrapListener(method, self) {
-        self = self || this;
+    wrapListener: function wrapListener(method, self = this) {
         method.wrapper = wrappedListener;
         wrappedListener.wrapped = method;
         function wrappedListener(event) {

common/content/hints.js

@@ -12,11 +12,9 @@
 var HintSession = Class("HintSession", CommandMode, {
     get extendedMode() modes.HINTS,
 
-    init: function init(mode, opts) {
+    init: function init(mode, opts = {}) {
         init.supercall(this);
 
-        opts = opts || {};
-
         if (!opts.window)
             opts.window = modes.getStack(0).params.window;
 
@@ -1056,11 +1054,9 @@ var Hints = Module("hints", {
         return null;
     }, //}}}
 
-    open: function open(mode, opts) {
+    open: function open(mode, opts = {}) {
         this._extendedhintCount = opts.count;
 
-        opts = opts || {};
-
         mappings.pushCommand();
         commandline.input(["Normal", mode], null, {
             autocomplete: false,

common/content/history.js

@@ -13,9 +13,7 @@ var History = Module("history", {
 
     get service() services.history,
 
-    get: function get(filter, maxItems, sort) {
-        sort = sort || this.SORT_DEFAULT;
-
+    get: function get(filter, maxItems, sort = this.SORT_DEFAULT) {
         if (isString(filter))
             filter = { searchTerms: filter };
 

common/content/mappings.js

@@ -187,9 +187,7 @@ var MapHive = Class("MapHive", Contexts.Hive, {
      * @param {Object} extra An optional extra configuration hash.
      * @optional
      */
-    add: function (modes, keys, description, action, extra) {
-        extra = extra || {};
-
+    add: function (modes, keys, description, action, extra = {}) {
         modes = Array.concat(modes);
         if (!modes.every(util.identity))
             throw TypeError(/*L*/"Invalid modes: " + modes);
@@ -814,9 +812,7 @@ var Mappings = Module("mappings", {
         });
     },
     completion: function initCompletion(dactyl, modules, window) {
-        completion.userMapping = function userMapping(context, modes_, hive) {
-            hive = hive || mappings.user;
-            modes_ = modes_ || [modes.NORMAL];
+        completion.userMapping = function userMapping(context, modes_ = [modes.NORMAL], hive = mappings.user) {
             context.keys = { text: function (m) m.names[0],
                              description: function (m) m.description + ": " + m.action };
             context.completions = hive.iterate(modes_);

common/content/marks.js

@@ -34,12 +34,10 @@ var Marks = Module("marks", {
 
     get localURI() buffer.focusedFrame.document.documentURI.replace(/#.*/, ""),
 
-    Mark: function Mark(params) {
+    Mark: function Mark(params = {}) {
         let win = buffer.focusedFrame;
         let doc = win.document;
 
-        params = params || {};
-
         params.location = doc.documentURI.replace(/#.*/, ""),
         params.offset = buffer.scrollPosition;
         params.path = DOM(buffer.findScrollable(0, false)).xpath;

common/content/modes.js

@@ -502,11 +502,10 @@ var Modes = Module("modes", {
         return StackElement;
     })(),
     cacheId: 0,
-    boundProperty: function BoundProperty(desc) {
+    boundProperty: function BoundProperty(desc = {}) {
         let id = this.cacheId++;
         let value;
 
-        desc = desc || {};
         return Class.Property(update({
             configurable: true,
             enumerable: true,

common/content/tabs.js

@@ -408,8 +408,7 @@ var Tabs = Module("tabs", {
      * @param {number} count How many tabs to remove.
      * @param {boolean} focusLeftTab Focus the tab to the left of the removed tab.
      */
-    remove: function remove(tab, count, focusLeftTab) {
-        count = count || 1;
+    remove: function remove(tab, count = 1, focusLeftTab = false) {
         let res = this.count > count;
 
         let tabs = this.visibleTabs;