WebDriver: Get Element Rect should not round to integer values

https://bugs.webkit.org/show_bug.cgi?id=248556
rdar://100588620

Reviewed by BJ Burg.

The x/y/width/height of the element rect is specified to be in "CSS Pixels", which is a decimal number of pixels. We
should as such not round to the nearest containing IntRect.

This progresses the following WPT tests:
webdriver/tests/get_element_rect/get.py::test_basic
webdriver/tests/get_element_rect/user_prompts.py::test_accept[capabilities0-alert-None]
webdriver/tests/get_element_rect/user_prompts.py::test_accept[capabilities0-confirm-True]
webdriver/tests/get_element_rect/user_prompts.py::test_accept[capabilities0-prompt-]
webdriver/tests/get_element_rect/user_prompts.py::test_dismiss[capabilities0-alert-None]
webdriver/tests/get_element_rect/user_prompts.py::test_dismiss[capabilities0-confirm-False]
webdriver/tests/get_element_rect/user_prompts.py::test_dismiss[capabilities0-prompt-None]

* Source/WebKit/UIProcess/Automation/WebAutomationSession.cpp:
(WebKit::WebAutomationSession::computeElementLayout):
(WebKit::WebAutomationSession::viewportInViewCenterPointOfElement):
* Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.cpp:
(WebKit::WebAutomationSessionProxy::computeElementLayout):
* Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.h:
* Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.messages.in:

Canonical link: https://commits.webkit.org/257498@main

Source/WebKit/UIProcess/Automation/WebAutomationSession.cpp

@@ -1068,7 +1068,7 @@ void WebAutomationSession::computeElementLayout(const Inspector::Protocol::Autom
     if (!coordinateSystem)
         ASYNC_FAIL_WITH_PREDEFINED_ERROR_AND_DETAILS(InvalidParameter, "The parameter 'coordinateSystem' is invalid.");
 
-    WTF::CompletionHandler<void(std::optional<String>, WebCore::IntRect, std::optional<WebCore::IntPoint>, bool)> completionHandler = [callback](std::optional<String> errorType, WebCore::IntRect rect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool isObscured) mutable {
+    WTF::CompletionHandler<void(std::optional<String>, WebCore::FloatRect, std::optional<WebCore::IntPoint>, bool)> completionHandler = [callback](std::optional<String> errorType, WebCore::FloatRect rect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool isObscured) mutable {
         if (errorType) {
             callback->sendFailure(STRING_FOR_PREDEFINED_ERROR_MESSAGE(*errorType));
             return;
@@ -1721,7 +1721,7 @@ SimulatedInputDispatcher& WebAutomationSession::inputDispatcherForPage(WebPagePr
 // MARK: SimulatedInputDispatcher::Client API
 void WebAutomationSession::viewportInViewCenterPointOfElement(WebPageProxy& page, std::optional<FrameIdentifier> frameID, const Inspector::Protocol::Automation::NodeHandle& nodeHandle, Function<void(std::optional<WebCore::IntPoint>, std::optional<AutomationCommandError>)>&& completionHandler)
 {
-    WTF::CompletionHandler<void(std::optional<String>, WebCore::IntRect, std::optional<WebCore::IntPoint>, bool)> didComputeElementLayoutHandler = [completionHandler = WTFMove(completionHandler)](std::optional<String> errorType, WebCore::IntRect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool) mutable {
+    WTF::CompletionHandler<void(std::optional<String>, WebCore::FloatRect, std::optional<WebCore::IntPoint>, bool)> didComputeElementLayoutHandler = [completionHandler = WTFMove(completionHandler)](std::optional<String> errorType, WebCore::FloatRect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool) mutable {
         if (errorType) {
             completionHandler(std::nullopt, AUTOMATION_COMMAND_ERROR_WITH_MESSAGE(*errorType));
             return;

Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.cpp

@@ -657,7 +657,7 @@ static WebCore::FloatPoint convertPointFromFrameClientToRootView(WebCore::FrameV
     return clientPoint;
 }
 
-void WebAutomationSessionProxy::computeElementLayout(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle, bool scrollIntoViewIfNeeded, CoordinateSystem coordinateSystem, CompletionHandler<void(std::optional<String>, WebCore::IntRect, std::optional<WebCore::IntPoint>, bool)>&& completionHandler)
+void WebAutomationSessionProxy::computeElementLayout(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle, bool scrollIntoViewIfNeeded, CoordinateSystem coordinateSystem, CompletionHandler<void(std::optional<String>, WebCore::FloatRect, std::optional<WebCore::IntPoint>, bool)>&& completionHandler)
 {
     WebPage* page = WebProcess::singleton().webPage(pageID);
     if (!page) {
@@ -697,17 +697,17 @@ void WebAutomationSessionProxy::computeElementLayout(WebCore::PageIdentifier pag
     WebCore::FrameView* frameView = frame->coreFrame()->view();
     WebCore::FrameView* mainView = frame->coreFrame()->mainFrame().view();
 
-    WebCore::IntRect resultElementBounds;
+    WebCore::FloatRect resultElementBounds;
     std::optional<WebCore::IntPoint> resultInViewCenterPoint;
     bool isObscured = false;
 
     switch (coordinateSystem) {
     case CoordinateSystem::Page:
-        resultElementBounds = enclosingIntRect(coreElement->boundingClientRect());
+        resultElementBounds = coreElement->boundingClientRect();
         break;
     case CoordinateSystem::LayoutViewport: {
         auto elementBoundsInRootCoordinates = convertRectFromFrameClientToRootView(frameView, coreElement->boundingClientRect());
-        resultElementBounds = enclosingIntRect(mainView->absoluteToLayoutViewportRect(mainView->rootViewToContents(elementBoundsInRootCoordinates)));
+        resultElementBounds = mainView->absoluteToLayoutViewportRect(mainView->rootViewToContents(elementBoundsInRootCoordinates));
         break;
     }
     }

Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.h

@@ -77,7 +77,7 @@ class WebAutomationSessionProxy : public IPC::MessageReceiver {
     void resolveChildFrameWithNodeHandle(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, const String& nodeHandle, CompletionHandler<void(std::optional<String>, std::optional<WebCore::FrameIdentifier>)>&&);
     void resolveChildFrameWithName(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, const String& name, CompletionHandler<void(std::optional<String>, std::optional<WebCore::FrameIdentifier>)>&&);
     void resolveParentFrame(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, CompletionHandler<void(std::optional<String>, std::optional<WebCore::FrameIdentifier>)>&&);
-    void computeElementLayout(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, String nodeHandle, bool scrollIntoViewIfNeeded, CoordinateSystem, CompletionHandler<void(std::optional<String>, WebCore::IntRect, std::optional<WebCore::IntPoint>, bool)>&&);
+    void computeElementLayout(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, String nodeHandle, bool scrollIntoViewIfNeeded, CoordinateSystem, CompletionHandler<void(std::optional<String>, WebCore::FloatRect, std::optional<WebCore::IntPoint>, bool)>&&);
     void getComputedRole(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, String nodeHandle, CompletionHandler<void(std::optional<String>, std::optional<String>)>&&);
     void getComputedLabel(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, String nodeHandle, CompletionHandler<void(std::optional<String>, std::optional<String>)>&&);
     void selectOptionElement(WebCore::PageIdentifier, std::optional<WebCore::FrameIdentifier>, String nodeHandle, CompletionHandler<void(std::optional<String>)>&&);

Source/WebKit/WebProcess/Automation/WebAutomationSessionProxy.messages.in

@@ -28,7 +28,7 @@ messages -> WebAutomationSessionProxy NotRefCounted {
     ResolveChildFrameWithName(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String name) -> (std::optional<String> errorType, std::optional<WebCore::FrameIdentifier> frameID)
     ResolveParentFrame(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID) -> (std::optional<String> errorType, std::optional<WebCore::FrameIdentifier> frameID)
 
-    ComputeElementLayout(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle, bool scrollIntoViewIfNeeded, enum:uint8_t WebKit::CoordinateSystem coordinateSystem) -> (std::optional<String> errorType, WebCore::IntRect rect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool isObscured)
+    ComputeElementLayout(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle, bool scrollIntoViewIfNeeded, enum:uint8_t WebKit::CoordinateSystem coordinateSystem) -> (std::optional<String> errorType, WebCore::FloatRect rect, std::optional<WebCore::IntPoint> inViewCenterPoint, bool isObscured)
 
     GetComputedRole(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle) -> (std::optional<String> role, std::optional<String> errorType)
     GetComputedLabel(WebCore::PageIdentifier pageID, std::optional<WebCore::FrameIdentifier> frameID, String nodeHandle) -> (std::optional<String> role, std::optional<String> errorType)