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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/195432">195432</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2016-01-21 18:06:49 -0800 (Thu, 21 Jan 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>Web Inspector: Add toggle-able list of classes for each element
https://bugs.webkit.org/show_bug.cgi?id=152678

Patch by Devin Rousso &lt;dcrousso+webkit@gmail.com&gt; on 2016-01-21
Reviewed by Timothy Hatcher.

Adds a button to the CSS sidebar that, when toggled, displays a section
directly above it containing all the classes for the selected node that,
when toggled, adds or removes the class from the node.

* Localizations/en.lproj/localizedStrings.js:

* UserInterface/Protocol/RemoteObject.js:
(WebInspector.RemoteObject.prototype.callFunction.mycallback):
(WebInspector.RemoteObject.prototype.callFunction):
Add extra handling of arguments to allow nicer looking calls by other classes.

* UserInterface/Views/CSSStyleDetailsSidebarPanel.css:
Changed next-sibling selector (+) to general-sibling selector (~).

(.sidebar &gt; .panel.details.css-style &gt; .content ~ :matches(.options-container, .class-list-container)):
(.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule, .has-filter-bar) ~ :matches(.options-container, .class-list-container)):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle.selected):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle:not(.selected):hover):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container[hidden]):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; input[type=&quot;checkbox&quot;]):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .add-class-icon):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .class-name-input):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class:not(.active) &gt; .class-name-input):
(.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; *:matches(.new-class, .class-toggle)):

* UserInterface/Views/CSSStyleDetailsSidebarPanel.js:
(WebInspector.CSSStyleDetailsSidebarPanel):
Also changed the few instances of &quot;var&quot; to &quot;let&quot;.

(WebInspector.CSSStyleDetailsSidebarPanel.prototype.refresh):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype.addEventListeners):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._handleNodeAttributeModified):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._handleNodeAttributeRemoved):
Adds listeners to the DOMNode specifically listening for changes to the
class attribute and repopulates the class toggle list if fired.

(WebInspector.CSSStyleDetailsSidebarPanel.prototype._classToggleButtonClicked):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassContainerClicked):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassInputKeyPressed):
If the Enter key is pressed, add a new class equal to the input value.

(WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassInputBlur):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._populateClassToggles):
Loops through all the classes, including previously removed ones, for the
selected node and creates a toggle for each.

(WebInspector.CSSStyleDetailsSidebarPanel.prototype._createToggleForClassName.classNameToggleChanged):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._createToggleForClassName):
Creates a toggle element for the given className and adds it to the container.

(WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass.resolvedNode.toggleClass):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass.resolvedNode):
(WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass):
Uses the Element.classList to toggle the given className on the selected node.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebInspectorUIChangeLog">trunk/Source/WebInspectorUI/ChangeLog</a></li>
<li><a href="#trunkSourceWebInspectorUILocalizationsenlprojlocalizedStringsjs">trunk/Source/WebInspectorUI/Localizations/en.lproj/localizedStrings.js</a></li>
<li><a href="#trunkSourceWebInspectorUIUserInterfaceProtocolRemoteObjectjs">trunk/Source/WebInspectorUI/UserInterface/Protocol/RemoteObject.js</a></li>
<li><a href="#trunkSourceWebInspectorUIUserInterfaceViewsCSSStyleDetailsSidebarPanelcss">trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.css</a></li>
<li><a href="#trunkSourceWebInspectorUIUserInterfaceViewsCSSStyleDetailsSidebarPaneljs">trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebInspectorUIChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/ChangeLog (195431 => 195432)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/ChangeLog        2016-01-22 02:05:28 UTC (rev 195431)
+++ trunk/Source/WebInspectorUI/ChangeLog        2016-01-22 02:06:49 UTC (rev 195432)
</span><span class="lines">@@ -1,3 +1,68 @@
</span><ins>+2016-01-21  Devin Rousso  &lt;dcrousso+webkit@gmail.com&gt;
+
+        Web Inspector: Add toggle-able list of classes for each element
+        https://bugs.webkit.org/show_bug.cgi?id=152678
+
+        Reviewed by Timothy Hatcher.
+
+        Adds a button to the CSS sidebar that, when toggled, displays a section
+        directly above it containing all the classes for the selected node that,
+        when toggled, adds or removes the class from the node.
+
+        * Localizations/en.lproj/localizedStrings.js:
+
+        * UserInterface/Protocol/RemoteObject.js:
+        (WebInspector.RemoteObject.prototype.callFunction.mycallback):
+        (WebInspector.RemoteObject.prototype.callFunction):
+        Add extra handling of arguments to allow nicer looking calls by other classes.
+
+        * UserInterface/Views/CSSStyleDetailsSidebarPanel.css:
+        Changed next-sibling selector (+) to general-sibling selector (~).
+
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ :matches(.options-container, .class-list-container)):
+        (.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule, .has-filter-bar) ~ :matches(.options-container, .class-list-container)):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle.selected):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle:not(.selected):hover):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container[hidden]):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; input[type=&quot;checkbox&quot;]):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .add-class-icon):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .class-name-input):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class:not(.active) &gt; .class-name-input):
+        (.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; *:matches(.new-class, .class-toggle)):
+
+        * UserInterface/Views/CSSStyleDetailsSidebarPanel.js:
+        (WebInspector.CSSStyleDetailsSidebarPanel):
+        Also changed the few instances of &quot;var&quot; to &quot;let&quot;.
+
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype.refresh):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype.addEventListeners):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._handleNodeAttributeModified):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._handleNodeAttributeRemoved):
+        Adds listeners to the DOMNode specifically listening for changes to the
+        class attribute and repopulates the class toggle list if fired.
+
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._classToggleButtonClicked):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassContainerClicked):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassInputKeyPressed):
+        If the Enter key is pressed, add a new class equal to the input value.
+
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._addClassInputBlur):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._populateClassToggles):
+        Loops through all the classes, including previously removed ones, for the
+        selected node and creates a toggle for each.
+
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._createToggleForClassName.classNameToggleChanged):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._createToggleForClassName):
+        Creates a toggle element for the given className and adds it to the container.
+
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass.resolvedNode.toggleClass):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass.resolvedNode):
+        (WebInspector.CSSStyleDetailsSidebarPanel.prototype._toggleClass):
+        Uses the Element.classList to toggle the given className on the selected node.
+
</ins><span class="cx"> 2016-01-20  Saam barati  &lt;sbarati@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Web Inspector: Hook the sampling profiler into the Timelines UI
</span></span></pre></div>
<a id="trunkSourceWebInspectorUILocalizationsenlprojlocalizedStringsjs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/Localizations/en.lproj/localizedStrings.js (195431 => 195432)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/Localizations/en.lproj/localizedStrings.js        2016-01-22 02:05:28 UTC (rev 195431)
+++ trunk/Source/WebInspectorUI/Localizations/en.lproj/localizedStrings.js        2016-01-22 02:06:49 UTC (rev 195432)
</span><span class="lines">@@ -53,6 +53,7 @@
</span><span class="cx"> localizedStrings[&quot;Add New&quot;] = &quot;Add New&quot;;
</span><span class="cx"> localizedStrings[&quot;Add New Probe Expression&quot;] = &quot;Add New Probe Expression&quot;;
</span><span class="cx"> localizedStrings[&quot;Add New Watch Expression&quot;] = &quot;Add New Watch Expression&quot;;
</span><ins>+localizedStrings[&quot;Add a Class&quot;] = &quot;Add a Class&quot;;
</ins><span class="cx"> localizedStrings[&quot;Add new breakpoint action after this action&quot;] = &quot;Add new breakpoint action after this action&quot;;
</span><span class="cx"> localizedStrings[&quot;Add probe expression&quot;] = &quot;Add probe expression&quot;;
</span><span class="cx"> localizedStrings[&quot;Add watch expression&quot;] = &quot;Add watch expression&quot;;
</span><span class="lines">@@ -116,6 +117,7 @@
</span><span class="cx"> localizedStrings[&quot;Checked&quot;] = &quot;Checked&quot;;
</span><span class="cx"> localizedStrings[&quot;Child Layers&quot;] = &quot;Child Layers&quot;;
</span><span class="cx"> localizedStrings[&quot;Children&quot;] = &quot;Children&quot;;
</span><ins>+localizedStrings[&quot;Classes&quot;] = &quot;Classes&quot;;
</ins><span class="cx"> localizedStrings[&quot;Clear&quot;] = &quot;Clear&quot;;
</span><span class="cx"> localizedStrings[&quot;Clear Log&quot;] = &quot;Clear Log&quot;;
</span><span class="cx"> localizedStrings[&quot;Clear Log on Navigation&quot;] = &quot;Clear Log on Navigation&quot;;
</span><span class="lines">@@ -266,6 +268,7 @@
</span><span class="cx"> localizedStrings[&quot;Encoded&quot;] = &quot;Encoded&quot;;
</span><span class="cx"> localizedStrings[&quot;Encoding&quot;] = &quot;Encoding&quot;;
</span><span class="cx"> localizedStrings[&quot;End Capturing&quot;] = &quot;End Capturing&quot;;
</span><ins>+localizedStrings[&quot;Enter Class Name&quot;] = &quot;Enter Class Name&quot;;
</ins><span class="cx"> localizedStrings[&quot;Enter a Gradient&quot;] = &quot;Enter a Gradient&quot;;
</span><span class="cx"> localizedStrings[&quot;Enter a URL&quot;] = &quot;Enter a URL&quot;;
</span><span class="cx"> localizedStrings[&quot;Enter a name.&quot;] = &quot;Enter a name.&quot;;
</span><span class="lines">@@ -647,6 +650,7 @@
</span><span class="cx"> localizedStrings[&quot;Timer Removed&quot;] = &quot;Timer Removed&quot;;
</span><span class="cx"> localizedStrings[&quot;Timestamp \u2014 %s&quot;] = &quot;Timestamp \u2014 %s&quot;;
</span><span class="cx"> localizedStrings[&quot;Timing&quot;] = &quot;Timing&quot;;
</span><ins>+localizedStrings[&quot;Toggle Classes&quot;] = &quot;Toggle Classes&quot;;
</ins><span class="cx"> localizedStrings[&quot;Top&quot;] = &quot;Top&quot;;
</span><span class="cx"> localizedStrings[&quot;Total Time&quot;] = &quot;Total Time&quot;;
</span><span class="cx"> localizedStrings[&quot;Total number of resources, click to show the Resources tab&quot;] = &quot;Total number of resources, click to show the Resources tab&quot;;
</span></span></pre></div>
<a id="trunkSourceWebInspectorUIUserInterfaceProtocolRemoteObjectjs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/UserInterface/Protocol/RemoteObject.js (195431 => 195432)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/UserInterface/Protocol/RemoteObject.js        2016-01-22 02:05:28 UTC (rev 195431)
+++ trunk/Source/WebInspectorUI/UserInterface/Protocol/RemoteObject.js        2016-01-22 02:06:49 UTC (rev 195432)
</span><span class="lines">@@ -416,13 +416,15 @@
</span><span class="cx">         function mycallback(error, result, wasThrown)
</span><span class="cx">         {
</span><span class="cx">             result = result ? WebInspector.RemoteObject.fromPayload(result) : null;
</span><del>-            callback(error, result, wasThrown);
</del><ins>+
+            if (callback &amp;&amp; typeof callback === &quot;function&quot;)
+                callback(error, result, wasThrown);
</ins><span class="cx">         }
</span><span class="cx"> 
</span><span class="cx">         if (args)
</span><span class="cx">             args = args.map(WebInspector.RemoteObject.createCallArgument);
</span><span class="cx"> 
</span><del>-        RuntimeAgent.callFunctionOn(this._objectId, appendWebInspectorSourceURL(functionDeclaration.toString()), args, true, undefined, generatePreview, mycallback);
</del><ins>+        RuntimeAgent.callFunctionOn(this._objectId, appendWebInspectorSourceURL(functionDeclaration.toString()), args, true, undefined, !!generatePreview, mycallback);
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     callFunctionJSON(functionDeclaration, args, callback)
</span></span></pre></div>
<a id="trunkSourceWebInspectorUIUserInterfaceViewsCSSStyleDetailsSidebarPanelcss"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.css (195431 => 195432)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.css        2016-01-22 02:05:28 UTC (rev 195431)
+++ trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.css        2016-01-22 02:06:49 UTC (rev 195432)
</span><span class="lines">@@ -65,22 +65,25 @@
</span><span class="cx">     white-space: nowrap;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-.sidebar &gt; .panel.details.css-style &gt; .content + .options-container {
</del><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ :matches(.options-container, .class-list-container) {
</ins><span class="cx">     display: flex;
</span><span class="cx">     align-items: center;
</span><span class="cx">     position: absolute;
</span><del>-    bottom: 0;
</del><span class="cx">     width: 100%;
</span><del>-    height: 29px;
</del><span class="cx">     background-color: white;
</span><span class="cx">     border-top: 1px solid hsl(0, 0%, 70%);
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule, .has-filter-bar) + .options-container {
</del><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container {
+    bottom: 0;
+    height: 30px;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule, .has-filter-bar) ~ :matches(.options-container, .class-list-container) {
</ins><span class="cx">     display: none;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-.sidebar &gt; .panel.details.css-style &gt; .content + .options-container &gt; .new-rule {
</del><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .new-rule {
</ins><span class="cx">     width: 15px;
</span><span class="cx">     min-width: 15px;
</span><span class="cx">     height: 15px;
</span><span class="lines">@@ -89,16 +92,77 @@
</span><span class="cx">     opacity: 0.7;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-.sidebar &gt; .panel.details.css-style &gt; .content + .options-container &gt; .filter-bar {
</del><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .filter-bar {
</ins><span class="cx">     width: -webkit-fill-available;
</span><span class="cx">     background-color: transparent;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule) + .options-container &gt; .new-rule,
-.sidebar &gt; .panel.details.css-style &gt; .content:not(.has-filter-bar) + .options-container &gt; .filter-bar {
</del><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle {
+    margin: 0 5px 1px 0;
+    padding: 2px 4px 3px;
+    background: none;
+    border: none;
+    border-radius: 3px;
+    -webkit-appearance: none;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle.selected {
+    color: white;
+    background-color: hsl(212, 92%, 54%);
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .options-container &gt; .toggle-class-toggle:not(.selected):hover {
+    color: white;
+    background-color: hsla(212, 92%, 54%, 0.5);
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content:not(.supports-new-rule) ~ .options-container &gt; .new-rule,
+.sidebar &gt; .panel.details.css-style &gt; .content:not(.has-filter-bar) ~ .options-container &gt; .filter-bar {
</ins><span class="cx">     display: none;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container {
+    flex-wrap: wrap;
+    bottom: 30px;
+    max-height: 65px;
+    padding: 3px 2px;
+    overflow-y: scroll;
+}
+
+/* FIXME: &lt;https://webkit.org/b/152674&gt; Elements with the &quot;hidden&quot; attribute still show up if &quot;display: flex;&quot; */
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container[hidden] {
+    display: none;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class {
+    display: flex;
+    align-items: center;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; input[type=&quot;checkbox&quot;] {
+    pointer-events: none;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .add-class-icon {
+    width: 12px;
+    height: 12px;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class &gt; .class-name-input {
+    width: 100px;
+    height: 18px;
+    margin: 0 0 0 2px;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class.active &gt; .add-class-icon,
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; .new-class:not(.active) &gt; .class-name-input {
+    display: none;
+}
+
+.sidebar &gt; .panel.details.css-style &gt; .content ~ .class-list-container &gt; *:matches(.new-class, .class-toggle) {
+    margin: 1px 3px;
+}
+
</ins><span class="cx"> .sidebar &gt; .panel.details.css-style &gt; .content.filter-in-progress .filter-matching {
</span><span class="cx">     display: inline;
</span><span class="cx">     background-color: hsla(53, 83%, 53%, 0.5);
</span></span></pre></div>
<a id="trunkSourceWebInspectorUIUserInterfaceViewsCSSStyleDetailsSidebarPaneljs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.js (195431 => 195432)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.js        2016-01-22 02:05:28 UTC (rev 195431)
+++ trunk/Source/WebInspectorUI/UserInterface/Views/CSSStyleDetailsSidebarPanel.js        2016-01-22 02:06:49 UTC (rev 195432)
</span><span class="lines">@@ -37,15 +37,15 @@
</span><span class="cx">             this._forcedPseudoClassContainer = document.createElement(&quot;div&quot;);
</span><span class="cx">             this._forcedPseudoClassContainer.className = &quot;pseudo-classes&quot;;
</span><span class="cx"> 
</span><del>-            var groupElement = null;
</del><ins>+            let groupElement = null;
</ins><span class="cx"> 
</span><span class="cx">             WebInspector.CSSStyleManager.ForceablePseudoClasses.forEach(function(pseudoClass) {
</span><span class="cx">                 // We don't localize the label since it is a CSS pseudo-class from the CSS standard.
</span><del>-                var label = pseudoClass.capitalize();
</del><ins>+                let label = pseudoClass.capitalize();
</ins><span class="cx"> 
</span><del>-                var labelElement = document.createElement(&quot;label&quot;);
</del><ins>+                let labelElement = document.createElement(&quot;label&quot;);
</ins><span class="cx"> 
</span><del>-                var checkboxElement = document.createElement(&quot;input&quot;);
</del><ins>+                let checkboxElement = document.createElement(&quot;input&quot;);
</ins><span class="cx">                 checkboxElement.addEventListener(&quot;change&quot;, this._forcedPseudoClassCheckboxChanged.bind(this, pseudoClass));
</span><span class="cx">                 checkboxElement.type = &quot;checkbox&quot;;
</span><span class="cx"> 
</span><span class="lines">@@ -87,24 +87,43 @@
</span><span class="cx">         this._navigationItem = new WebInspector.ScopeRadioButtonNavigationItem(this._identifier, this._displayName, this._panelNavigationInfo, selectedPanel.navigationInfo);
</span><span class="cx">         this._navigationItem.addEventListener(WebInspector.ScopeRadioButtonNavigationItem.Event.SelectedItemChanged, this._handleSelectedItemChanged, this);
</span><span class="cx"> 
</span><del>-        var optionsContainer = document.createElement(&quot;div&quot;);
-        optionsContainer.classList.add(&quot;options-container&quot;);
</del><ins>+        let optionsContainer = this.element.createChild(&quot;div&quot;, &quot;options-container&quot;);
</ins><span class="cx"> 
</span><del>-        var newRuleButton = document.createElement(&quot;img&quot;);
-        newRuleButton.classList.add(&quot;new-rule&quot;);
</del><ins>+        let newRuleButton = optionsContainer.createChild(&quot;img&quot;, &quot;new-rule&quot;);
</ins><span class="cx">         newRuleButton.title = WebInspector.UIString(&quot;New Rule&quot;);
</span><span class="cx">         newRuleButton.addEventListener(&quot;click&quot;, this._newRuleButtonClicked.bind(this));
</span><del>-        optionsContainer.appendChild(newRuleButton);
</del><span class="cx"> 
</span><span class="cx">         this._filterBar = new WebInspector.FilterBar;
</span><span class="cx">         this._filterBar.placeholder = WebInspector.UIString(&quot;Filter Styles&quot;);
</span><span class="cx">         this._filterBar.addEventListener(WebInspector.FilterBar.Event.FilterDidChange, this._filterDidChange, this);
</span><span class="cx">         optionsContainer.appendChild(this._filterBar.element);
</span><span class="cx"> 
</span><ins>+        this._classToggleButton = optionsContainer.createChild(&quot;button&quot;, &quot;toggle-class-toggle&quot;);
+        this._classToggleButton.textContent = WebInspector.UIString(&quot;Classes&quot;);
+        this._classToggleButton.title = WebInspector.UIString(&quot;Toggle Classes&quot;);
+        this._classToggleButton.addEventListener(&quot;click&quot;, this._classToggleButtonClicked.bind(this));
+
+        this._classListContainer = this.element.createChild(&quot;div&quot;, &quot;class-list-container&quot;);
+        this._classListContainer.hidden = true;
+
+        this._addClassContainer = this._classListContainer.createChild(&quot;div&quot;, &quot;new-class&quot;);
+        this._addClassContainer.title = WebInspector.UIString(&quot;Add a Class&quot;);
+        this._addClassContainer.addEventListener(&quot;click&quot;, this._addClassContainerClicked.bind(this));
+
+        let addClassCheckbox = this._addClassContainer.createChild(&quot;input&quot;);
+        addClassCheckbox.type = &quot;checkbox&quot;;
+        addClassCheckbox.checked = true;
+
+        let addClassIcon = useSVGSymbol(&quot;Images/Plus13.svg&quot;, &quot;add-class-icon&quot;);
+        this._addClassContainer.appendChild(addClassIcon);
+
+        this._addClassInput = this._addClassContainer.createChild(&quot;input&quot;, &quot;class-name-input&quot;);
+        this._addClassInput.setAttribute(&quot;placeholder&quot;, WebInspector.UIString(&quot;Enter Class Name&quot;));
+        this._addClassInput.addEventListener(&quot;keypress&quot;, this._addClassInputKeyPressed.bind(this));
+        this._addClassInput.addEventListener(&quot;blur&quot;, this._addClassInputBlur.bind(this));
+
</ins><span class="cx">         WebInspector.cssStyleManager.addEventListener(WebInspector.CSSStyleManager.Event.StyleSheetAdded, this.refresh, this);
</span><span class="cx">         WebInspector.cssStyleManager.addEventListener(WebInspector.CSSStyleManager.Event.StyleSheetRemoved, this.refresh, this);
</span><del>-
-        this.element.appendChild(optionsContainer);
</del><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Public
</span><span class="lines">@@ -116,18 +135,21 @@
</span><span class="cx"> 
</span><span class="cx">     refresh()
</span><span class="cx">     {
</span><del>-        var domNode = this.domNode;
</del><ins>+        let domNode = this.domNode;
</ins><span class="cx">         if (!domNode)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><span class="cx">         this.contentView.element.scrollTop = this._initialScrollOffset;
</span><span class="cx"> 
</span><del>-        for (var panel of this._panels) {
</del><ins>+        for (let panel of this._panels) {
</ins><span class="cx">             panel.element._savedScrollTop = undefined;
</span><span class="cx">             panel.markAsNeedsRefresh(domNode);
</span><span class="cx">         }
</span><span class="cx"> 
</span><span class="cx">         this._updatePseudoClassCheckboxes();
</span><ins>+
+        if (!this._classListContainer.hidden)
+            this._populateClassToggles();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     visibilityDidChange()
</span><span class="lines">@@ -168,16 +190,18 @@
</span><span class="cx"> 
</span><span class="cx">     addEventListeners()
</span><span class="cx">     {
</span><del>-        var effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</del><ins>+        let effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</ins><span class="cx">         if (!effectiveDOMNode)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><span class="cx">         effectiveDOMNode.addEventListener(WebInspector.DOMNode.Event.EnabledPseudoClassesChanged, this._updatePseudoClassCheckboxes, this);
</span><ins>+        effectiveDOMNode.addEventListener(WebInspector.DOMNode.Event.AttributeModified, this._handleNodeAttributeModified, this);
+        effectiveDOMNode.addEventListener(WebInspector.DOMNode.Event.AttributeRemoved, this._handleNodeAttributeRemoved, this);
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     removeEventListeners()
</span><span class="cx">     {
</span><del>-        var effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</del><ins>+        let effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</ins><span class="cx">         if (!effectiveDOMNode)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><span class="lines">@@ -201,9 +225,8 @@
</span><span class="cx"> 
</span><span class="cx">     _panelMatchingIdentifier(identifier)
</span><span class="cx">     {
</span><del>-        var selectedPanel
-
-        for (var panel of this._panels) {
</del><ins>+        let selectedPanel = null;
+        for (let panel of this._panels) {
</ins><span class="cx">             if (panel.navigationInfo.identifier !== identifier)
</span><span class="cx">                 continue;
</span><span class="cx"> 
</span><span class="lines">@@ -216,8 +239,8 @@
</span><span class="cx"> 
</span><span class="cx">     _handleSelectedItemChanged()
</span><span class="cx">     {
</span><del>-        var selectedIdentifier = this._navigationItem.selectedItemIdentifier;
-        var selectedPanel = this._panelMatchingIdentifier(selectedIdentifier);
</del><ins>+        let selectedIdentifier = this._navigationItem.selectedItemIdentifier;
+        let selectedPanel = this._panelMatchingIdentifier(selectedIdentifier);
</ins><span class="cx">         this._switchPanels(selectedPanel);
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -258,7 +281,7 @@
</span><span class="cx">         if (!this.domNode)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><del>-        var effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</del><ins>+        let effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</ins><span class="cx"> 
</span><span class="cx">         effectiveDOMNode.setPseudoClassEnabled(pseudoClass, event.target.checked);
</span><span class="cx">     }
</span><span class="lines">@@ -268,22 +291,162 @@
</span><span class="cx">         if (!this.domNode)
</span><span class="cx">             return;
</span><span class="cx"> 
</span><del>-        var effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</del><ins>+        let effectiveDOMNode = this.domNode.isPseudoElement() ? this.domNode.parentNode : this.domNode;
</ins><span class="cx"> 
</span><del>-        var enabledPseudoClasses = effectiveDOMNode.enabledPseudoClasses;
</del><ins>+        let enabledPseudoClasses = effectiveDOMNode.enabledPseudoClasses;
</ins><span class="cx"> 
</span><del>-        for (var pseudoClass in this._forcedPseudoClassCheckboxes) {
-            var checkboxElement = this._forcedPseudoClassCheckboxes[pseudoClass];
</del><ins>+        for (let pseudoClass in this._forcedPseudoClassCheckboxes) {
+            let checkboxElement = this._forcedPseudoClassCheckboxes[pseudoClass];
</ins><span class="cx">             checkboxElement.checked = enabledPseudoClasses.includes(pseudoClass);
</span><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><ins>+    _handleNodeAttributeModified(event)
+    {
+        if (event &amp;&amp; event.data &amp;&amp; event.data.name === &quot;class&quot;)
+            this._populateClassToggles();
+    }
+
+    _handleNodeAttributeRemoved(event)
+    {
+        if (event &amp;&amp; event.data &amp;&amp; event.data.name === &quot;class&quot;)
+            this._populateClassToggles();
+    }
+
+
</ins><span class="cx">     _newRuleButtonClicked()
</span><span class="cx">     {
</span><span class="cx">         if (this._selectedPanel &amp;&amp; typeof this._selectedPanel.newRuleButtonClicked === &quot;function&quot;)
</span><span class="cx">             this._selectedPanel.newRuleButtonClicked();
</span><span class="cx">     }
</span><span class="cx"> 
</span><ins>+    _classToggleButtonClicked(event)
+    {
+        this._classToggleButton.classList.toggle(&quot;selected&quot;);
+        this._classListContainer.hidden = !this._classListContainer.hidden;
+        if (this._classListContainer.hidden)
+            return;
+
+        this._populateClassToggles();
+    }
+
+    _addClassContainerClicked(event)
+    {
+        this._addClassContainer.classList.add(&quot;active&quot;);
+        this._addClassInput.focus();
+    }
+
+    _addClassInputKeyPressed(event)
+    {
+        if (event.keyCode !== WebInspector.KeyboardShortcut.Key.Enter.keyCode)
+            return;
+
+        this._addClassInput.blur();
+    }
+
+    _addClassInputBlur(event)
+    {
+        this._toggleClass.call(this, this._addClassInput.value, true);
+        this._addClassContainer.classList.remove(&quot;active&quot;);
+        this._addClassInput.value = null;
+    }
+
+    _populateClassToggles()
+    {
+        this._classListContainer.removeChildren();
+        this._classListContainer.appendChild(this._addClassContainer);
+
+        let classes = this.domNode.getAttribute(&quot;class&quot;);
+        let classToggledMap = this.domNode[WebInspector.CSSStyleDetailsSidebarPanel.ToggledClassesSymbol];
+        if (!classToggledMap)
+            classToggledMap = this.domNode[WebInspector.CSSStyleDetailsSidebarPanel.ToggledClassesSymbol] = new Map;
+
+        if (classes &amp;&amp; classes.length) {
+            for (let className of classes.split(/\s+/))
+                classToggledMap.set(className, true);
+        }
+
+        for (let [className, toggled] of classToggledMap) {
+            if ((toggled &amp;&amp; !classes.includes(className)) || (!toggled &amp;&amp; classes.includes(className))) {
+                toggled = !toggled;
+                classToggledMap.set(className, toggled);
+            }
+
+            this._createToggleForClassName(className);
+        }
+    }
+
+    _createToggleForClassName(className)
+    {
+        if (!className || !className.length)
+            return;
+
+        let classToggledMap = this.domNode[WebInspector.CSSStyleDetailsSidebarPanel.ToggledClassesSymbol];
+        if (!classToggledMap)
+            return;
+
+        if (!classToggledMap.has(className))
+            classToggledMap.set(className, true);
+
+        let toggled = classToggledMap.get(className);
+
+        let classNameContainer = document.createElement(&quot;div&quot;);
+        classNameContainer.classList.add(&quot;class-toggle&quot;);
+
+        let classNameToggle = classNameContainer.createChild(&quot;input&quot;);
+        classNameToggle.type = &quot;checkbox&quot;;
+        classNameToggle.checked = toggled;
+
+        let classNameTitle = classNameContainer.createChild(&quot;span&quot;);
+        classNameTitle.textContent = className;
+
+        function classNameToggleChanged(event) {
+            this._toggleClass.call(this, className, classNameToggle.checked);
+            classToggledMap.set(className, classNameToggle.checked);
+        }
+
+        classNameToggle.addEventListener(&quot;click&quot;, classNameToggleChanged.bind(this));
+        classNameTitle.addEventListener(&quot;click&quot;, (event) =&gt; {
+            classNameToggle.checked = !classNameToggle.checked;
+            classNameToggleChanged.call(this);
+        });
+
+        this._classListContainer.appendChild(classNameContainer);
+    }
+
+    _toggleClass(className, flag)
+    {
+        if (!className || !className.length)
+            return;
+
+        let effectiveNode = this.domNode;
+        if (effectiveNode &amp;&amp; effectiveNode.isPseudoElement())
+            effectiveNode = effectiveNode.parentNode;
+
+        console.assert(effectiveNode);
+        if (!effectiveNode)
+            return;
+
+        if (effectiveNode.nodeType() !== Node.ELEMENT_NODE)
+            return;
+
+        function resolvedNode(object)
+        {
+            if (!object)
+                return;
+
+            function toggleClass(className, flag)
+            {
+                this.classList.toggle(className, flag);
+            }
+
+            object.callFunction(toggleClass, [className, flag]);
+            object.release();
+        }
+
+        WebInspector.RemoteObject.resolveNode(effectiveNode, &quot;&quot;, resolvedNode);
+    }
+
</ins><span class="cx">     _filterDidChange()
</span><span class="cx">     {
</span><span class="cx">         this.contentView.element.classList.toggle(WebInspector.CSSStyleDetailsSidebarPanel.FilterInProgressClassName, this._filterBar.hasActiveFilters());
</span><span class="lines">@@ -299,3 +462,4 @@
</span><span class="cx"> WebInspector.CSSStyleDetailsSidebarPanel.NoFilterMatchInSectionClassName = &quot;filter-section-non-matching&quot;;
</span><span class="cx"> WebInspector.CSSStyleDetailsSidebarPanel.NoFilterMatchInPropertyClassName = &quot;filter-property-non-matching&quot;;
</span><span class="cx"> 
</span><ins>+WebInspector.CSSStyleDetailsSidebarPanel.ToggledClassesSymbol = Symbol(&quot;css-style-details-sidebar-panel-toggled-classes-symbol&quot;);
</ins></span></pre>
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