Title: [198737] trunk/Source/WebKit2
Revision
198737
Author
timo...@apple.com
Date
2016-03-28 08:57:06 -0700 (Mon, 28 Mar 2016)

Log Message

Web Automation: Add Automation.evaluateJavaScriptFunction

https://bugs.webkit.org/show_bug.cgi?id=155524
rdar://problem/25181888

Reviewed by Joseph Pecoraro.

* UIProcess/Automation/Automation.json: Added evaluateJavaScriptFunction command.

* UIProcess/Automation/WebAutomationSession.cpp:
(WebKit::WebAutomationSession::evaluateJavaScriptFunction): Added.
(WebKit::WebAutomationSession::didEvaluateJavaScriptFunction): Added.
* UIProcess/Automation/WebAutomationSession.h:
* UIProcess/Automation/WebAutomationSession.messages.in: Added didEvaluateJavaScriptFunction.

* WebProcess/Automation/WebAutomationSessionProxy.cpp:
(WebKit::toJSArray): Added.
(WebKit::callPropertyFunction): Added.
(WebKit::evaluateJavaScriptCallback): Added.
(WebKit::WebAutomationSessionProxy::didClearWindowObjectForFrame): Dispatch pending callbacks as errors.
(WebKit::WebAutomationSessionProxy::evaluateJavaScriptFunction): Added.
(WebKit::WebAutomationSessionProxy::didEvaluateJavaScriptFunction): Added.
* WebProcess/Automation/WebAutomationSessionProxy.h:

* WebProcess/Automation/WebAutomationSessionProxy.js:
(AutomationSessionProxy): Added maps for node handles.
(AutomationSessionProxy.prototype.evaluateJavaScriptFunction): Added.
(AutomationSessionProxy.prototype._jsonParse): Added.
(AutomationSessionProxy.prototype._jsonStringify): Added.
(AutomationSessionProxy.prototype._reviveJSONValue): Added.
(AutomationSessionProxy.prototype._replaceJSONValue): Added.
(AutomationSessionProxy.prototype._createNodeHandle): Added.
(AutomationSessionProxy.prototype._nodeForIdentifier): Added.
(AutomationSessionProxy.prototype._identifierForNode): Added.

* WebProcess/Automation/WebAutomationSessionProxy.messages.in: Added evaluateJavaScriptFunction.

Modified Paths

Diff

Modified: trunk/Source/WebKit2/ChangeLog (198736 => 198737)


--- trunk/Source/WebKit2/ChangeLog	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/ChangeLog	2016-03-28 15:57:06 UTC (rev 198737)
@@ -1,3 +1,42 @@
+2016-03-17  Timothy Hatcher  <timo...@apple.com>
+
+        Web Automation: Add Automation.evaluateJavaScriptFunction
+
+        https://bugs.webkit.org/show_bug.cgi?id=155524
+        rdar://problem/25181888
+
+        Reviewed by Joseph Pecoraro.
+
+        * UIProcess/Automation/Automation.json: Added evaluateJavaScriptFunction command.
+
+        * UIProcess/Automation/WebAutomationSession.cpp:
+        (WebKit::WebAutomationSession::evaluateJavaScriptFunction): Added.
+        (WebKit::WebAutomationSession::didEvaluateJavaScriptFunction): Added.
+        * UIProcess/Automation/WebAutomationSession.h:
+        * UIProcess/Automation/WebAutomationSession.messages.in: Added didEvaluateJavaScriptFunction.
+
+        * WebProcess/Automation/WebAutomationSessionProxy.cpp:
+        (WebKit::toJSArray): Added.
+        (WebKit::callPropertyFunction): Added.
+        (WebKit::evaluateJavaScriptCallback): Added.
+        (WebKit::WebAutomationSessionProxy::didClearWindowObjectForFrame): Dispatch pending callbacks as errors.
+        (WebKit::WebAutomationSessionProxy::evaluateJavaScriptFunction): Added.
+        (WebKit::WebAutomationSessionProxy::didEvaluateJavaScriptFunction): Added.
+        * WebProcess/Automation/WebAutomationSessionProxy.h:
+
+        * WebProcess/Automation/WebAutomationSessionProxy.js:
+        (AutomationSessionProxy): Added maps for node handles.
+        (AutomationSessionProxy.prototype.evaluateJavaScriptFunction): Added.
+        (AutomationSessionProxy.prototype._jsonParse): Added.
+        (AutomationSessionProxy.prototype._jsonStringify): Added.
+        (AutomationSessionProxy.prototype._reviveJSONValue): Added.
+        (AutomationSessionProxy.prototype._replaceJSONValue): Added.
+        (AutomationSessionProxy.prototype._createNodeHandle): Added.
+        (AutomationSessionProxy.prototype._nodeForIdentifier): Added.
+        (AutomationSessionProxy.prototype._identifierForNode): Added.
+
+        * WebProcess/Automation/WebAutomationSessionProxy.messages.in: Added evaluateJavaScriptFunction.
+
 2016-03-14  Timothy Hatcher  <timo...@apple.com>
 
         Add WebAutomationSessionProxy for WebProcess side automation tasks

Modified: trunk/Source/WebKit2/UIProcess/Automation/Automation.json (198736 => 198737)


--- trunk/Source/WebKit2/UIProcess/Automation/Automation.json	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/UIProcess/Automation/Automation.json	2016-03-28 15:57:06 UTC (rev 198737)
@@ -13,7 +13,9 @@
             "description": "This enum contains predefined error messages that can be used to signal a well-defined error condition, such as a missing implementation, unknown window handle, and so forth. The backend signals one of these errors by using it as a prefix of the commands's error message (the errorString argument in generated C++ backend dispatchers). This will be reported to the frontend as a protocol error with a JSON-RPC error code of 'ServerError'. It is up to the frontend whether and how to deal with errors.",
             "enum": [
                 "InternalError",
+                "_javascript_Error",
                 "WindowNotFound",
+                "NodeNotFound",
                 "NotImplemented"
             ]
         },
@@ -95,6 +97,20 @@
             "parameters": [
                 { "name": "handle", "$ref": "BrowsingContextHandle", "description": "The handle for the browsing context that should be reloaded." }
             ]
+        },
+        {
+            "name": "evaluateJavaScriptFunction",
+            "description": "Evaluates a script function in a browsing context and calls it with the supplied arguments.",
+            "parameters": [
+                { "name": "handle", "$ref": "BrowsingContextHandle", "description": "The handle for the browsing context the script should be evaluated." },
+                { "name": "function", "type": "string", "description": "The script to evaluate in the browsing context. The script is expected to be a function declaration, or otherwise evaluate to a function result." },
+                { "name": "arguments", "type": "array", "items": { "type": "string" }, "description": "The arguments to pass to the function when called. They will be parsed as JSON before calling the function." },
+                { "name": "expectsImplicitCallbackArgument", "type": "boolean", "description": "The function expects a callback function as the last argument. It is expected to call this callback with a result." }
+            ],
+            "returns": [
+                { "name": "result", "type": "string", "description": "The result returned by the called function. It is JSON encoded after the function returns or calls the callback." }
+            ],
+            "async": true
         }
     ]
 }

Modified: trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.cpp (198736 => 198737)


--- trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.cpp	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.cpp	2016-03-28 15:57:06 UTC (rev 198737)
@@ -255,4 +255,39 @@
     page->reload(reloadFromOrigin, contentBlockersEnabled);
 }
 
+void WebAutomationSession::evaluateJavaScriptFunction(Inspector::ErrorString& errorString, const String& handle, const String& function, const Inspector::InspectorArray& arguments, bool expectsImplicitCallbackArgument, Ref<EvaluateJavaScriptFunctionCallback>&& callback)
+{
+    // FIXME 24172439: This should be a frame handle, not a page handle. Change this once we have frame support.
+    WebPageProxy* page = webPageProxyForHandle(handle);
+    if (!page)
+        FAIL_WITH_PREDEFINED_ERROR_MESSAGE(WindowNotFound);
+
+    Vector<String> argumentsVector;
+    argumentsVector.reserveCapacity(arguments.length());
+
+    for (auto& argument : arguments) {
+        String argumentString;
+        argument->asString(argumentString);
+        argumentsVector.uncheckedAppend(argumentString);
+    }
+
+    uint64_t callbackID = m_nextEvaluateJavaScriptCallbackID++;
+    m_evaluateJavaScriptFunctionCallbacks.set(callbackID, WTFMove(callback));
+
+    page->process().send(Messages::WebAutomationSessionProxy::EvaluateJavaScriptFunction(page->mainFrame()->frameID(), function, argumentsVector, expectsImplicitCallbackArgument, callbackID), 0);
+}
+
+void WebAutomationSession::didEvaluateJavaScriptFunction(uint64_t callbackID, const String& result, const String& errorType)
+{
+    auto callback = m_evaluateJavaScriptFunctionCallbacks.take(callbackID);
+    if (!callback)
+        return;
+
+    if (!errorType.isEmpty()) {
+        // FIXME: We should send both the errorType and result, since result has the specific exception message.
+        callback->sendFailure(errorType);
+    } else
+        callback->sendSuccess(result);
+}
+
 } // namespace WebKit

Modified: trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.h (198736 => 198737)


--- trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.h	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.h	2016-03-28 15:57:06 UTC (rev 198737)
@@ -89,6 +89,7 @@
     void goBackInBrowsingContext(Inspector::ErrorString&, const String&) override;
     void goForwardInBrowsingContext(Inspector::ErrorString&, const String&) override;
     void reloadBrowsingContext(Inspector::ErrorString&, const String&) override;
+    void evaluateJavaScriptFunction(Inspector::ErrorString&, const String& handle, const String& function, const Inspector::InspectorArray& arguments, bool expectsImplicitCallbackArgument, Ref<Inspector::AutomationBackendDispatcherHandler::EvaluateJavaScriptFunctionCallback>&&) override;
 
 private:
     WebKit::WebPageProxy* webPageProxyForHandle(const String&);
@@ -98,8 +99,7 @@
     void didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) override;
 
     // Called by WebAutomationSession messages
-    // FIXME: Add message functions here.
-    void test() { };
+    void didEvaluateJavaScriptFunction(uint64_t callbackID, const String& result, const String& errorType);
 
     WebKit::WebProcessPool* m_processPool { nullptr };
     std::unique_ptr<API::AutomationSessionClient> m_client;
@@ -112,6 +112,9 @@
     HandleWebPageMap m_handleWebPageMap;
     String m_activeBrowsingContextHandle;
 
+    uint64_t m_nextEvaluateJavaScriptCallbackID { 1 };
+    HashMap<uint64_t, RefPtr<Inspector::AutomationBackendDispatcherHandler::EvaluateJavaScriptFunctionCallback>> m_evaluateJavaScriptFunctionCallbacks;
+
 #if ENABLE(REMOTE_INSPECTOR)
     Inspector::FrontendChannel* m_remoteChannel { nullptr };
 #endif

Modified: trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.messages.in (198736 => 198737)


--- trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.messages.in	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/UIProcess/Automation/WebAutomationSession.messages.in	2016-03-28 15:57:06 UTC (rev 198737)
@@ -21,6 +21,5 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 messages -> WebAutomationSession {
-    // FIXME: Add messages here.
-    Test()
+    DidEvaluateJavaScriptFunction(uint64_t callbackID, String result, String errorType)
 }

Modified: trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.cpp (198736 => 198737)


--- trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.cpp	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.cpp	2016-03-28 15:57:06 UTC (rev 198737)
@@ -26,6 +26,7 @@
 #include "config.h"
 #include "WebAutomationSessionProxy.h"
 
+#include "InspectorProtocolObjects.h"
 #include "WebAutomationSessionMessages.h"
 #include "WebAutomationSessionProxyMessages.h"
 #include "WebAutomationSessionProxyScriptSource.h"
@@ -39,6 +40,31 @@
 
 namespace WebKit {
 
+template <typename T>
+static JSObjectRef toJSArray(JSContextRef context, const Vector<T>& data, JSValueRef (*converter)(JSContextRef, const T&), JSValueRef* exception)
+{
+    ASSERT_ARG(converter, converter);
+
+    if (data.isEmpty())
+        return JSObjectMakeArray(context, 0, nullptr, exception);
+
+    Vector<JSValueRef, 8> convertedData;
+    convertedData.reserveCapacity(data.size());
+
+    for (auto& originalValue : data) {
+        JSValueRef convertedValue = converter(context, originalValue);
+        JSValueProtect(context, convertedValue);
+        convertedData.uncheckedAppend(convertedValue);
+    }
+
+    JSObjectRef array = JSObjectMakeArray(context, convertedData.size(), convertedData.data(), exception);
+
+    for (auto& convertedValue : convertedData)
+        JSValueUnprotect(context, convertedValue);
+
+    return array;
+}
+
 static inline JSRetainPtr<JSStringRef> toJSString(const String& string)
 {
     return JSRetainPtr<JSStringRef>(Adopt, OpaqueJSString::create(string).leakRef());
@@ -49,6 +75,17 @@
     return JSValueMakeString(context, toJSString(string).get());
 }
 
+static inline JSValueRef callPropertyFunction(JSContextRef context, JSObjectRef object, const String& propertyName, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
+{
+    ASSERT_ARG(object, object);
+    ASSERT_ARG(object, JSValueIsObject(context, object));
+
+    JSObjectRef function = const_cast<JSObjectRef>(JSObjectGetProperty(context, object, toJSString(propertyName).get(), exception));
+    ASSERT(JSObjectIsFunction(context, function));
+
+    return JSObjectCallAsFunction(context, function, object, argumentCount, arguments, exception);
+}
+
 WebAutomationSessionProxy::WebAutomationSessionProxy(const String& sessionIdentifier)
     : m_sessionIdentifier(sessionIdentifier)
 {
@@ -77,6 +114,26 @@
     return toJSValue(context, WebCore::createCanonicalUUIDString().convertToASCIIUppercase());
 }
 
+static JSValueRef evaluateJavaScriptCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
+{
+    ASSERT_ARG(argumentCount, argumentCount == 3);
+    ASSERT_ARG(arguments, JSValueIsNumber(context, arguments[0]));
+    ASSERT_ARG(arguments, JSValueIsNumber(context, arguments[1]));
+    ASSERT_ARG(arguments, JSValueIsString(context, arguments[2]));
+
+    auto automationSessionProxy = WebProcess::singleton().automationSessionProxy();
+    if (!automationSessionProxy)
+        return JSValueMakeUndefined(context);
+
+    uint64_t frameID = JSValueToNumber(context, arguments[0], exception);
+    uint64_t callbackID = JSValueToNumber(context, arguments[1], exception);
+    JSRetainPtr<JSStringRef> result(Adopt, JSValueToStringCopy(context, arguments[2], exception));
+
+    automationSessionProxy->didEvaluateJavaScriptFunction(frameID, callbackID, result->string(), emptyString());
+
+    return JSValueMakeUndefined(context);
+}
+
 JSObjectRef WebAutomationSessionProxy::scriptObjectForFrame(WebFrame& frame)
 {
     if (JSObjectRef scriptObject = m_webFrameScriptObjectMap.get(frame.frameID()))
@@ -106,8 +163,80 @@
 
 void WebAutomationSessionProxy::didClearWindowObjectForFrame(WebFrame& frame)
 {
-    if (JSObjectRef scriptObject = m_webFrameScriptObjectMap.take(frame.frameID()))
+    uint64_t frameID = frame.frameID();
+    if (JSObjectRef scriptObject = m_webFrameScriptObjectMap.take(frameID))
         JSValueUnprotect(frame.jsContext(), scriptObject);
+
+    String errorMessage = ASCIILiteral("Callback was not called before the unload event.");
+    String errorType = Inspector::Protocol::getEnumConstantValue(Inspector::Protocol::Automation::ErrorMessage::_javascript_Error);
+
+    auto pendingFrameCallbacks = m_webFramePendingEvaluateJavaScriptCallbacksMap.take(frameID);
+    for (uint64_t callbackID : pendingFrameCallbacks)
+        WebProcess::singleton().parentProcessConnection()->send(Messages::WebAutomationSession::DidEvaluateJavaScriptFunction(callbackID, emptyString(), errorType), 0);
 }
 
+void WebAutomationSessionProxy::evaluateJavaScriptFunction(uint64_t frameID, const String& function, Vector<String> arguments, bool expectsImplicitCallbackArgument, uint64_t callbackID)
+{
+    WebFrame* frame = WebProcess::singleton().webFrame(frameID);
+    if (!frame)
+        return;
+
+    JSObjectRef scriptObject = scriptObjectForFrame(*frame);
+    if (!scriptObject)
+        return;
+
+    JSValueRef exception = nullptr;
+    JSGlobalContextRef context = frame->jsContext();
+
+    JSObjectRef callbackFunction = JSObjectMakeFunctionWithCallback(context, nullptr, evaluateJavaScriptCallback);
+
+    if (expectsImplicitCallbackArgument) {
+        auto result = m_webFramePendingEvaluateJavaScriptCallbacksMap.add(frameID, Vector<uint64_t>());
+        result.iterator->value.append(callbackID);
+    }
+
+    JSValueRef functionArguments[] = {
+        toJSValue(context, function),
+        toJSArray(context, arguments, toJSValue, &exception),
+        JSValueMakeBoolean(context, expectsImplicitCallbackArgument),
+        JSValueMakeNumber(context, frameID),
+        JSValueMakeNumber(context, callbackID),
+        callbackFunction
+    };
+
+    callPropertyFunction(context, scriptObject, ASCIILiteral("evaluateJavaScriptFunction"), WTF_ARRAY_LENGTH(functionArguments), functionArguments, &exception);
+
+    if (!exception)
+        return;
+
+    String errorType = Inspector::Protocol::getEnumConstantValue(Inspector::Protocol::Automation::ErrorMessage::_javascript_Error);
+
+    JSRetainPtr<JSStringRef> exceptionMessage;
+    if (JSValueIsObject(context, exception)) {
+        JSValueRef nameValue = JSObjectGetProperty(context, const_cast<JSObjectRef>(exception), toJSString(ASCIILiteral("name")).get(), nullptr);
+        JSRetainPtr<JSStringRef> exceptionName(Adopt, JSValueToStringCopy(context, nameValue, nullptr));
+        if (exceptionName->string() == "NodeNotFound")
+            errorType = Inspector::Protocol::getEnumConstantValue(Inspector::Protocol::Automation::ErrorMessage::NodeNotFound);
+
+        JSValueRef messageValue = JSObjectGetProperty(context, const_cast<JSObjectRef>(exception), toJSString(ASCIILiteral("message")).get(), nullptr);
+        exceptionMessage.adopt(JSValueToStringCopy(context, messageValue, nullptr));
+    } else
+        exceptionMessage.adopt(JSValueToStringCopy(context, exception, nullptr));
+
+    didEvaluateJavaScriptFunction(frameID, callbackID, exceptionMessage->string(), errorType);
+}
+
+void WebAutomationSessionProxy::didEvaluateJavaScriptFunction(uint64_t frameID, uint64_t callbackID, const String& result, const String& errorType)
+{
+    auto findResult = m_webFramePendingEvaluateJavaScriptCallbacksMap.find(frameID);
+    if (findResult != m_webFramePendingEvaluateJavaScriptCallbacksMap.end()) {
+        findResult->value.removeFirst(callbackID);
+        ASSERT(!findResult->value.contains(callbackID));
+        if (findResult->value.isEmpty())
+            m_webFramePendingEvaluateJavaScriptCallbacksMap.remove(findResult);
+    }
+
+    WebProcess::singleton().parentProcessConnection()->send(Messages::WebAutomationSession::DidEvaluateJavaScriptFunction(callbackID, result, errorType), 0);
+}
+
 } // namespace WebKit

Modified: trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.h (198736 => 198737)


--- trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.h	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.h	2016-03-28 15:57:06 UTC (rev 198737)
@@ -43,6 +43,8 @@
 
     void didClearWindowObjectForFrame(WebFrame&);
 
+    void didEvaluateJavaScriptFunction(uint64_t frameID, uint64_t callbackID, const String& result, const String& errorType);
+
 private:
     JSObjectRef scriptObjectForFrame(WebFrame&);
 
@@ -50,13 +52,12 @@
     void didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&);
 
     // Called by WebAutomationSessionProxy messages
-    // FIXME: Add message functions here.
-    void test() { };
+    void evaluateJavaScriptFunction(uint64_t frameID, const String& function, Vector<String> arguments, bool expectsImplicitCallbackArgument, uint64_t callbackID);
 
     String m_sessionIdentifier;
 
-    typedef HashMap<uint64_t, JSObjectRef> WebFrameScriptObjectMap;
-    WebFrameScriptObjectMap m_webFrameScriptObjectMap;
+    HashMap<uint64_t, JSObjectRef> m_webFrameScriptObjectMap;
+    HashMap<uint64_t, Vector<uint64_t>> m_webFramePendingEvaluateJavaScriptCallbacksMap;
 };
 
 } // namespace WebKit

Modified: trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.js (198736 => 198737)


--- trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.js	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.js	2016-03-28 15:57:06 UTC (rev 198737)
@@ -27,14 +27,91 @@
 
 (function (sessionIdentifier, evaluate, createUUID) {
 
-// Protect against Object overwritten by the page.
-let Object = {}.constructor;
+const sessionNodePropertyName = "session-node-" + sessionIdentifier;
 
 let AutomationSessionProxy = class AutomationSessionProxy
 {
+    constructor()
+    {
+        this._nodeToIdMap = new Map;
+        this._idToNodeMap = new Map;
+    }
+
     // Public
 
-    // FIXME: Add functions here.
+    evaluateJavaScriptFunction(functionString, argumentStrings, expectsImplicitCallbackArgument, frameID, callbackID, resultCallback)
+    {
+        // The script is expected to be a function declaration. Evaluate it inside parenthesis to get the function value.
+        let functionValue = evaluate("(" + functionString + ")");
+        if (typeof functionValue !== "function")
+            throw new TypeError("Script did not evaluate to a function.");
+
+        let argumentValues = argumentStrings.map(this._jsonParse, this);
+        let callback = (result) => resultCallback(frameID, callbackID, this._jsonStringify(result));
+
+        if (expectsImplicitCallbackArgument) {
+            argumentValues.push(callback);
+            functionValue.apply(null, argumentValues);
+        } else
+            callback(functionValue.apply(null, argumentValues));
+    }
+
+    // Private
+
+    _jsonParse(string)
+    {
+        return JSON.parse(string, (key, value) => this._reviveJSONValue(key, value));
+    }
+
+    _jsonStringify(original)
+    {
+        return JSON.stringify(original, (key, value) => this._replaceJSONValue(key, value));
+    }
+
+    _reviveJSONValue(key, value)
+    {
+        if (value && typeof value === "object" && value[sessionNodePropertyName])
+            return this._nodeForIdentifier(value[sessionNodePropertyName]);
+        return value;
+    }
+
+    _replaceJSONValue(key, value)
+    {
+        if (value instanceof Node)
+            return this._createNodeHandle(value);
+
+        if (value instanceof NodeList || value instanceof HTMLCollection)
+            value = Array.from(value).map(this._createNodeHandle, this);
+
+        return value;
+    }
+
+    _createNodeHandle(node)
+    {
+        return {[sessionNodePropertyName]: this._identifierForNode(node)};
+    }
+
+    _nodeForIdentifier(identifier)
+    {
+        let node = this._idToNodeMap.get(identifier);
+        if (node)
+            return node;
+        throw {name: "NodeNotFound", message: "Node with identifier '" + identifier + "' was not found"};
+    }
+
+    _identifierForNode(node)
+    {
+        let identifier = this._nodeToIdMap.get(node);
+        if (identifier)
+            return identifier;
+
+        identifier = "node-" + createUUID();
+
+        this._nodeToIdMap.set(node, identifier);
+        this._idToNodeMap.set(identifier, node);
+
+        return identifier;
+    }
 };
 
 return new AutomationSessionProxy;

Modified: trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.messages.in (198736 => 198737)


--- trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.messages.in	2016-03-28 15:56:53 UTC (rev 198736)
+++ trunk/Source/WebKit2/WebProcess/Automation/WebAutomationSessionProxy.messages.in	2016-03-28 15:57:06 UTC (rev 198737)
@@ -21,6 +21,5 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 messages -> WebAutomationSessionProxy {
-    // FIXME: Add messages here.
-    Test()
+    EvaluateJavaScriptFunction(uint64_t frame, String function, Vector<String> arguments, bool expectsImplicitCallbackArgument, uint64_t callbackID)
 }
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