DevTools: Add features to collect classnames from Stylesheets and DOM

third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp
index 7ed5a9c0565280f5f17062fd8b95b99a931f7895..63fc9552d228e6bab30ee471e453bb5cd45f7071 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.cpp
@@ -581,6 +581,28 @@ Node* InspectorDOMAgent::nodeForId(int id)
     return nullptr;
 }
 
+void InspectorDOMAgent::collectClassNames(ErrorString* errorString, int nodeId, Maybe<protocol::Array<String>>* classNames)
+{
+    HashSet<String> uniqueNames;
+    *classNames = protocol::Array<String>::create();
+    Node* node = nodeForId(nodeId);
+    if (!node || (!node->isElementNode() && !node->isDocumentNode() && !node->isDocumentFragment()))
+        return;

[lushnikov, 2016/09/01 20:50:35]

let's return an error in this case

[ahmetemirercin, 2016/09/02 19:59:54]

Done.

+    for (Node& child : NodeTraversal::inclusiveDescendantsOf(*node)) {
+        if (child.isElementNode()) {
+            const Element& element = toElement(child);
+            if (!element.hasClass())
+                continue;
+            const SpaceSplitString& classNameList = element.classNames();
+            for (unsigned i = 0; i < classNameList.size(); ++i) {

[lushnikov, 2016/09/01 20:50:36]

style: drop {} around one-line blocks

[ahmetemirercin, 2016/09/02 19:59:54]

Done.

+                uniqueNames.add(classNameList[i]);
+            }
+        }
+    }
+    for (const String& className : uniqueNames)
+        classNames->fromJust()->addItem(className);
+}
+
 void InspectorDOMAgent::requestChildNodes(ErrorString* errorString, int nodeId, const Maybe<int>& depth)
 {
     int sanitizedDepth = depth.fromMaybe(1);