Implement URLSearchParams.

Source/bindings/v8/custom/V8URLSearchParamsCustom.cpp

+/*
+ * Copyright (c) 2014, Opera Software ASA. All rights reserved.
+ *
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+ * 2. Redistributions in binary form must reproduce the above copyright
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "V8URLSearchParams.h"
+
+#include "V8HTMLAnchorElement.h"
+#include "V8URL.h"
+#include "bindings/v8/ExceptionState.h"
+#include "bindings/v8/V8Binding.h"
+#include "bindings/v8/V8BindingMacros.h"
+#include "bindings/v8/V8DOMWrapper.h"
+#include "bindings/v8/V8GCController.h"
+#include "bindings/v8/V8Utilities.h"
+#include "core/dom/DOMURL.h"
+#include "core/dom/DOMURLSearchParams.h"
+#include "core/dom/DOMURLUtils.h"
+
+namespace WebCore {
+
+void V8URLSearchParams::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)

[arv (Not doing code reviews), 2014/01/22 16:12:05]

It is not clear to me why this needs a custom constructor?

[sof, 2014/01/22 17:15:47]

Ah, it is possible to do without -- I overlooked step 11 of
http://heycam.github.io/webidl/#es-union and the ToString() conversion that
should bring.

Nice; less custom code.

+{
+    ExceptionState exceptionState(ExceptionState::ConstructionContext, "URLSearchParams", info.Holder(), info.GetIsolate());
+    if (!info.Length()) {
+        RefPtr<DOMURLSearchParams> searchParams = DOMURLSearchParams::create();
+        v8SetReturnValue(info, searchParams.release());
+        return;
+    }
+
+    v8::Handle<v8::Object> wrapper = info.Holder();
+    RefPtr<DOMURLSearchParams> searchParams;
+    if (V8URLSearchParams::hasInstance(info[0], info.GetIsolate(), worldType(info.GetIsolate()))) {

[arv (Not doing code reviews), 2014/01/22 16:12:05]

I thought hasInstance was updated. Did you sync recently?

+        V8TRYCATCH_EXCEPTION_VOID(DOMURLSearchParams*, initial, V8URLSearchParams::toNative(v8::Handle<v8::Object>::Cast(info[0])), exceptionState);
+        searchParams = DOMURLSearchParams::create(initial);
+    } else if (info[0]->IsString()) {
+        searchParams = DOMURLSearchParams::create(toCoreString(info[0].As<v8::String>()));
+    } else {
+        exceptionState.throwTypeError("Argument not a string nor a URLSearchParams object.");
+        exceptionState.throwIfNeeded();
+        return;
+    }
+    V8DOMWrapper::associateObjectWithWrapper<V8URLSearchParams>(searchParams.release(), &V8URLSearchParams::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
+    v8SetReturnValue(info, wrapper);
+}
+
+void V8URLSearchParams::visitDOMWrapper(void* object, const v8::Persistent<v8::Object>& wrapper, v8::Isolate* isolate)

[arv (Not doing code reviews), 2014/01/22 16:12:05]

Could this be done with GenerateVisitDOMWrapper=ownerMethodName if we changed
the codegen slightly?

No need to do this now but it looks possible and custom binding code is always
something we should try to minimize.

[sof, 2014/01/22 17:15:47]

Definitely agree with that. The complexity enters due to the NoInterfaceObject
nature of URLUtils, so we have to bridge over to whatever concrete wrapper type
of the object that implements URLUtils. I didn't see a good fit with
[GenerateVisitDOMWrapper] (with possible tweaks) when considering using it
initially, but there could well be a feasible way.

(Another very minor spanner in the works here is that the combination of
ImplementedAs + GenerateVisitDOMWrapper is not quite supported by the codegen.)

+{
+    DOMURLSearchParams* impl = fromInternalPointer(object);
+    v8::Local<v8::Object> creationContext = v8::Local<v8::Object>::New(isolate, wrapper);
+    V8WrapperInstantiationScope scope(creationContext, isolate);
+    if (DOMURLUtils* urlObject = impl->urlObject()) {
+        switch (urlObject->implementedBy()) {
+        case DOMURLUtils::Anchor: {
+            HTMLAnchorElement* anchor = static_cast<HTMLAnchorElement*>(urlObject);
+            if (!DOMDataStore::containsWrapper<V8HTMLAnchorElement>(anchor, isolate))
+                wrap(anchor, creationContext, isolate);
+            DOMDataStore::setWrapperReference<V8HTMLAnchorElement>(wrapper, anchor, isolate);
+            break;
+        }
+        case DOMURLUtils::DomURL: {
+            DOMURL* domURL = static_cast<DOMURL*>(urlObject);
+            if (!DOMDataStore::containsWrapper<V8URL>(domURL, isolate))
+                wrap(domURL, creationContext, isolate);
+            DOMDataStore::setWrapperReference<V8URL>(wrapper, domURL, isolate);
+            break;
+        }
+        default:
+            // Either an entirely unexpected condition or you've forgotten to
+            // extend this switch to include handling for a new type.
+            ASSERT_NOT_REACHED();
+            break;
+        }
+    }
+    setObjectGroup(object, wrapper, isolate);
+}
+
+} // namespace WebCore