Rename V8WindowShell to WindowProxy

Source/bindings/core/v8/V8WindowShell.cpp

Index: Source/bindings/core/v8/V8WindowShell.cpp
diff --git a/Source/bindings/core/v8/V8WindowShell.cpp b/Source/bindings/core/v8/V8WindowShell.cpp
deleted file mode 100644
index afb5fb3e15c605fb6ef825743d04699bb2c0a18f..0000000000000000000000000000000000000000
--- a/Source/bindings/core/v8/V8WindowShell.cpp
+++ /dev/null
@@ -1,492 +0,0 @@
-/*
- * Copyright (C) 2008, 2009, 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, 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 "bindings/core/v8/V8WindowShell.h"
-
-#include "bindings/core/v8/DOMWrapperWorld.h"
-#include "bindings/core/v8/ScriptController.h"
-#include "bindings/core/v8/V8Binding.h"
-#include "bindings/core/v8/V8DOMActivityLogger.h"
-#include "bindings/core/v8/V8Document.h"
-#include "bindings/core/v8/V8GCForContextDispose.h"
-#include "bindings/core/v8/V8HTMLCollection.h"
-#include "bindings/core/v8/V8HTMLDocument.h"
-#include "bindings/core/v8/V8HiddenValue.h"
-#include "bindings/core/v8/V8Initializer.h"
-#include "bindings/core/v8/V8ObjectConstructor.h"
-#include "bindings/core/v8/V8Window.h"
-#include "core/frame/LocalFrame.h"
-#include "core/frame/csp/ContentSecurityPolicy.h"
-#include "core/html/HTMLCollection.h"
-#include "core/html/HTMLIFrameElement.h"
-#include "core/inspector/InspectorInstrumentation.h"
-#include "core/loader/DocumentLoader.h"
-#include "core/loader/FrameLoader.h"
-#include "core/loader/FrameLoaderClient.h"
-#include "platform/RuntimeEnabledFeatures.h"
-#include "platform/ScriptForbiddenScope.h"
-#include "platform/TraceEvent.h"
-#include "platform/heap/Handle.h"
-#include "platform/weborigin/SecurityOrigin.h"
-#include "public/platform/Platform.h"
-#include "wtf/Assertions.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/StringExtras.h"
-#include "wtf/text/CString.h"
-#include <algorithm>
-#include <utility>
-#include <v8-debug.h>
-#include <v8.h>
-
-namespace blink {
-
-static void checkDocumentWrapper(v8::Handle<v8::Object> wrapper, Document* document)
-{
-    ASSERT(V8Document::toNative(wrapper) == document);
-    ASSERT(!document->isHTMLDocument() || (V8Document::toNative(v8::Handle<v8::Object>::Cast(wrapper->GetPrototype())) == document));
-}
-
-PassOwnPtr<V8WindowShell> V8WindowShell::create(LocalFrame* frame, DOMWrapperWorld& world, v8::Isolate* isolate)
-{
-    return adoptPtr(new V8WindowShell(frame, &world, isolate));
-}
-
-V8WindowShell::V8WindowShell(LocalFrame* frame, PassRefPtr<DOMWrapperWorld> world, v8::Isolate* isolate)
-    : m_frame(frame)
-    , m_isolate(isolate)
-    , m_world(world)
-{
-}
-
-void V8WindowShell::disposeContext(GlobalDetachmentBehavior behavior)
-{
-    if (!isContextInitialized())
-        return;
-
-    v8::HandleScope handleScope(m_isolate);
-    v8::Handle<v8::Context> context = m_scriptState->context();
-    m_frame->loader().client()->willReleaseScriptContext(context, m_world->worldId());
-
-    if (behavior == DetachGlobal)
-        context->DetachGlobal();
-
-    m_scriptState->disposePerContextData();
-
-    // It's likely that disposing the context has created a lot of
-    // garbage. Notify V8 about this so it'll have a chance of cleaning
-    // it up when idle.
-    V8GCForContextDispose::instanceTemplate().notifyContextDisposed(m_frame->isMainFrame());
-}
-
-void V8WindowShell::clearForClose()
-{
-    if (!isContextInitialized())
-        return;
-
-    m_document.clear();
-    disposeContext(DoNotDetachGlobal);
-}
-
-void V8WindowShell::clearForNavigation()
-{
-    if (!isContextInitialized())
-        return;
-
-    ScriptState::Scope scope(m_scriptState.get());
-
-    m_document.clear();
-
-    // Clear the document wrapper cache before turning on access checks on
-    // the old LocalDOMWindow wrapper. This way, access to the document wrapper
-    // will be protected by the security checks on the LocalDOMWindow wrapper.
-    clearDocumentProperty();
-
-    v8::Handle<v8::Object> windowWrapper = V8Window::findInstanceInPrototypeChain(m_global.newLocal(m_isolate), m_isolate);
-    ASSERT(!windowWrapper.IsEmpty());
-    windowWrapper->TurnOnAccessCheck();
-    disposeContext(DetachGlobal);
-}
-
-// Create a new environment and setup the global object.
-//
-// The global object corresponds to a LocalDOMWindow instance. However, to
-// allow properties of the JS LocalDOMWindow instance to be shadowed, we
-// use a shadow object as the global object and use the JS LocalDOMWindow
-// instance as the prototype for that shadow object. The JS LocalDOMWindow
-// instance is undetectable from JavaScript code because the __proto__
-// accessors skip that object.
-//
-// The shadow object and the LocalDOMWindow instance are seen as one object
-// from JavaScript. The JavaScript object that corresponds to a
-// LocalDOMWindow instance is the shadow object. When mapping a LocalDOMWindow
-// instance to a V8 object, we return the shadow object.
-//
-// To implement split-window, see
-//   1) https://bugs.webkit.org/show_bug.cgi?id=17249
-//   2) https://wiki.mozilla.org/Gecko:SplitWindow
-//   3) https://bugzilla.mozilla.org/show_bug.cgi?id=296639
-// we need to split the shadow object further into two objects:
-// an outer window and an inner window. The inner window is the hidden
-// prototype of the outer window. The inner window is the default
-// global object of the context. A variable declared in the global
-// scope is a property of the inner window.
-//
-// The outer window sticks to a LocalFrame, it is exposed to JavaScript
-// via window.window, window.self, window.parent, etc. The outer window
-// has a security token which is the domain. The outer window cannot
-// have its own properties. window.foo = 'x' is delegated to the
-// inner window.
-//
-// When a frame navigates to a new page, the inner window is cut off
-// the outer window, and the outer window identify is preserved for
-// the frame. However, a new inner window is created for the new page.
-// If there are JS code holds a closure to the old inner window,
-// it won't be able to reach the outer window via its global object.
-bool V8WindowShell::initializeIfNeeded()
-{
-    if (isContextInitialized())
-        return true;
-
-    DOMWrapperWorld::setWorldOfInitializingWindow(m_world.get());
-    bool result = initialize();
-    DOMWrapperWorld::setWorldOfInitializingWindow(0);
-    return result;
-}
-
-bool V8WindowShell::initialize()
-{
-    TRACE_EVENT0("v8", "V8WindowShell::initialize");
-    TRACE_EVENT_SCOPED_SAMPLING_STATE("blink", "InitializeWindow");
-
-    ScriptForbiddenScope::AllowUserAgentScript allowScript;
-
-    v8::HandleScope handleScope(m_isolate);
-
-    createContext();
-
-    if (!isContextInitialized())
-        return false;
-
-    ScriptState::Scope scope(m_scriptState.get());
-    v8::Handle<v8::Context> context = m_scriptState->context();
-    if (m_global.isEmpty()) {
-        m_global.set(m_isolate, context->Global());
-        if (m_global.isEmpty()) {
-            disposeContext(DoNotDetachGlobal);
-            return false;
-        }
-    }
-
-    if (!installDOMWindow()) {
-        disposeContext(DoNotDetachGlobal);
-        return false;
-    }
-
-    if (m_world->isMainWorld()) {
-        // ActivityLogger for main world is updated within updateDocument().
-        updateDocument();
-        if (m_frame->document()) {
-            setSecurityToken(m_frame->document()->securityOrigin());
-            ContentSecurityPolicy* csp = m_frame->document()->contentSecurityPolicy();
-            context->AllowCodeGenerationFromStrings(csp->allowEval(0, ContentSecurityPolicy::SuppressReport));
-            context->SetErrorMessageForCodeGenerationFromStrings(v8String(m_isolate, csp->evalDisabledErrorMessage()));
-        }
-    } else {
-        updateActivityLogger();
-        SecurityOrigin* origin = m_world->isolatedWorldSecurityOrigin();
-        setSecurityToken(origin);
-        if (origin && InspectorInstrumentation::hasFrontends()) {
-            InspectorInstrumentation::didCreateIsolatedContext(m_frame, m_scriptState.get(), origin);
-        }
-    }
-    m_frame->loader().client()->didCreateScriptContext(context, m_world->extensionGroup(), m_world->worldId());
-    return true;
-}
-
-void V8WindowShell::createContext()
-{
-    // The documentLoader pointer could be 0 during frame shutdown.
-    // FIXME: Can we remove this check?
-    if (!m_frame->loader().documentLoader())
-        return;
-
-    // Create a new environment using an empty template for the shadow
-    // object. Reuse the global object if one has been created earlier.
-    v8::Handle<v8::ObjectTemplate> globalTemplate = V8Window::getShadowObjectTemplate(m_isolate);
-    if (globalTemplate.IsEmpty())
-        return;
-
-    double contextCreationStartInSeconds = currentTime();
-
-    // Dynamically tell v8 about our extensions now.
-    const V8Extensions& extensions = ScriptController::registeredExtensions();
-    OwnPtr<const char*[]> extensionNames = adoptArrayPtr(new const char*[extensions.size()]);
-    int index = 0;
-    int extensionGroup = m_world->extensionGroup();
-    int worldId = m_world->worldId();
-    for (size_t i = 0; i < extensions.size(); ++i) {
-        if (!m_frame->loader().client()->allowScriptExtension(extensions[i]->name(), extensionGroup, worldId))
-            continue;
-
-        extensionNames[index++] = extensions[i]->name();
-    }
-    v8::ExtensionConfiguration extensionConfiguration(index, extensionNames.get());
-
-    v8::Handle<v8::Context> context = v8::Context::New(m_isolate, &extensionConfiguration, globalTemplate, m_global.newLocal(m_isolate));
-    if (context.IsEmpty())
-        return;
-    m_scriptState = ScriptState::create(context, m_world);
-
-    double contextCreationDurationInMilliseconds = (currentTime() - contextCreationStartInSeconds) * 1000;
-    const char* histogramName = "WebCore.V8WindowShell.createContext.MainWorld";
-    if (!m_world->isMainWorld())
-        histogramName = "WebCore.V8WindowShell.createContext.IsolatedWorld";
-    blink::Platform::current()->histogramCustomCounts(histogramName, contextCreationDurationInMilliseconds, 0, 10000, 50);
-}
-
-static v8::Handle<v8::Object> toInnerGlobalObject(v8::Handle<v8::Context> context)
-{
-    return v8::Handle<v8::Object>::Cast(context->Global()->GetPrototype());
-}
-
-bool V8WindowShell::installDOMWindow()
-{
-    LocalDOMWindow* window = m_frame->domWindow();
-    v8::Local<v8::Object> windowWrapper = V8ObjectConstructor::newInstance(m_isolate, m_scriptState->perContextData()->constructorForType(&V8Window::wrapperTypeInfo));
-    if (windowWrapper.IsEmpty())
-        return false;
-
-    V8DOMWrapper::setNativeInfoForHiddenWrapper(v8::Handle<v8::Object>::Cast(windowWrapper->GetPrototype()), &V8Window::wrapperTypeInfo, V8Window::toInternalPointer(window));
-
-    // Install the windowWrapper as the prototype of the innerGlobalObject.
-    // The full structure of the global object is as follows:
-    //
-    // outerGlobalObject (Empty object, remains after navigation)
-    //   -- has prototype --> innerGlobalObject (Holds global variables, changes during navigation)
-    //   -- has prototype --> LocalDOMWindow instance
-    //   -- has prototype --> Window.prototype
-    //   -- has prototype --> Object.prototype
-    //
-    // Note: Much of this prototype structure is hidden from web content. The
-    //       outer, inner, and LocalDOMWindow instance all appear to be the same
-    //       JavaScript object.
-    //
-    // Note: With Oilpan, the LocalDOMWindow object is garbage collected.
-    //       Persistent references to this inner global object view of the LocalDOMWindow
-    //       aren't kept, as that would prevent the global object from ever being released.
-    //       It is safe not to do so, as the wrapper for the LocalDOMWindow being installed here
-    //       already keeps a persistent reference, and it along with the inner global object
-    //       views of the LocalDOMWindow will die together once that wrapper clears the persistent
-    //       reference.
-    v8::Handle<v8::Object> innerGlobalObject = toInnerGlobalObject(m_scriptState->context());
-    V8DOMWrapper::setNativeInfoForHiddenWrapper(innerGlobalObject, &V8Window::wrapperTypeInfo, V8Window::toInternalPointer(window));
-    innerGlobalObject->SetPrototype(windowWrapper);
-    V8DOMWrapper::associateObjectWithWrapper<V8Window>(PassRefPtrWillBeRawPtr<LocalDOMWindow>(window), &V8Window::wrapperTypeInfo, windowWrapper, m_isolate, WrapperConfiguration::Dependent);
-    V8Window::installConditionallyEnabledProperties(windowWrapper, m_isolate);
-    return true;
-}
-
-void V8WindowShell::updateDocumentWrapper(v8::Handle<v8::Object> wrapper)
-{
-    ASSERT(m_world->isMainWorld());
-    m_document.set(m_isolate, wrapper);
-}
-
-void V8WindowShell::updateDocumentProperty()
-{
-    if (!m_world->isMainWorld())
-        return;
-
-    ScriptState::Scope scope(m_scriptState.get());
-    v8::Handle<v8::Context> context = m_scriptState->context();
-    v8::Handle<v8::Value> documentWrapper = toV8(m_frame->document(), context->Global(), context->GetIsolate());
-    ASSERT(documentWrapper == m_document.newLocal(m_isolate) || m_document.isEmpty());
-    if (m_document.isEmpty())
-        updateDocumentWrapper(v8::Handle<v8::Object>::Cast(documentWrapper));
-    checkDocumentWrapper(m_document.newLocal(m_isolate), m_frame->document());
-
-    // If instantiation of the document wrapper fails, clear the cache
-    // and let the LocalDOMWindow accessor handle access to the document.
-    if (documentWrapper.IsEmpty()) {
-        clearDocumentProperty();
-        return;
-    }
-    ASSERT(documentWrapper->IsObject());
-    context->Global()->ForceSet(v8AtomicString(m_isolate, "document"), documentWrapper, static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
-
-    // We also stash a reference to the document on the inner global object so that
-    // LocalDOMWindow objects we obtain from JavaScript references are guaranteed to have
-    // live Document objects.
-    V8HiddenValue::setHiddenValue(m_isolate, toInnerGlobalObject(context), V8HiddenValue::document(m_isolate), documentWrapper);
-}
-
-void V8WindowShell::clearDocumentProperty()
-{
-    ASSERT(isContextInitialized());
-    if (!m_world->isMainWorld())
-        return;
-    v8::HandleScope handleScope(m_isolate);
-    m_scriptState->context()->Global()->ForceDelete(v8AtomicString(m_isolate, "document"));
-}
-
-void V8WindowShell::updateActivityLogger()
-{
-    m_scriptState->perContextData()->setActivityLogger(V8DOMActivityLogger::activityLogger(
-        m_world->worldId(), m_frame->document() ? m_frame->document()->baseURI() : KURL()));
-}
-
-void V8WindowShell::setSecurityToken(SecurityOrigin* origin)
-{
-    // If two tokens are equal, then the SecurityOrigins canAccess each other.
-    // If two tokens are not equal, then we have to call canAccess.
-    // Note: we can't use the HTTPOrigin if it was set from the DOM.
-    String token;
-    // We stick with an empty token if document.domain was modified or if we
-    // are in the initial empty document, so that we can do a full canAccess
-    // check in those cases.
-    bool delaySet = m_world->isMainWorld()
-        && (origin->domainWasSetInDOM()
-            || m_frame->loader().stateMachine()->isDisplayingInitialEmptyDocument());
-    if (origin && !delaySet)
-        token = origin->toString();
-
-    // An empty or "null" token means we always have to call
-    // canAccess. The toString method on securityOrigins returns the
-    // string "null" for empty security origins and for security
-    // origins that should only allow access to themselves. In this
-    // case, we use the global object as the security token to avoid
-    // calling canAccess when a script accesses its own objects.
-    v8::HandleScope handleScope(m_isolate);
-    v8::Handle<v8::Context> context = m_scriptState->context();
-    if (token.isEmpty() || token == "null") {
-        context->UseDefaultSecurityToken();
-        return;
-    }
-
-    if (m_world->isPrivateScriptIsolatedWorld())
-        token = "private-script://" + token;
-
-    CString utf8Token = token.utf8();
-    // NOTE: V8 does identity comparison in fast path, must use a symbol
-    // as the security token.
-    context->SetSecurityToken(v8AtomicString(m_isolate, utf8Token.data(), utf8Token.length()));
-}
-
-void V8WindowShell::updateDocument()
-{
-    ASSERT(m_world->isMainWorld());
-    if (!isGlobalInitialized())
-        return;
-    if (!isContextInitialized())
-        return;
-    updateActivityLogger();
-    updateDocumentProperty();
-    updateSecurityOrigin(m_frame->document()->securityOrigin());
-}
-
-static v8::Handle<v8::Value> getNamedProperty(HTMLDocument* htmlDocument, const AtomicString& key, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
-{
-    if (!htmlDocument->hasNamedItem(key) && !htmlDocument->hasExtraNamedItem(key))
-        return v8Undefined();
-
-    RefPtrWillBeRawPtr<HTMLCollection> items = htmlDocument->documentNamedItems(key);
-    if (items->isEmpty())
-        return v8Undefined();
-
-    if (items->hasExactlyOneItem()) {
-        Element* element = items->item(0);
-        ASSERT(element);
-        Frame* frame = isHTMLIFrameElement(*element) ? toHTMLIFrameElement(*element).contentFrame() : 0;
-        if (frame)
-            return toV8(frame->domWindow(), creationContext, isolate);
-        return toV8(element, creationContext, isolate);
-    }
-    return toV8(items.release(), creationContext, isolate);
-}
-
-static void getter(v8::Local<v8::String> property, const v8::PropertyCallbackInfo<v8::Value>& info)
-{
-    // FIXME: Consider passing StringImpl directly.
-    AtomicString name = toCoreAtomicString(property);
-    HTMLDocument* htmlDocument = V8HTMLDocument::toNative(info.Holder());
-    ASSERT(htmlDocument);
-    v8::Handle<v8::Value> result = getNamedProperty(htmlDocument, name, info.Holder(), info.GetIsolate());
-    if (!result.IsEmpty()) {
-        v8SetReturnValue(info, result);
-        return;
-    }
-    v8::Handle<v8::Value> prototype = info.Holder()->GetPrototype();
-    if (prototype->IsObject()) {
-        v8SetReturnValue(info, prototype.As<v8::Object>()->Get(property));
-        return;
-    }
-}
-
-void V8WindowShell::namedItemAdded(HTMLDocument* document, const AtomicString& name)
-{
-    ASSERT(m_world->isMainWorld());
-
-    if (!isContextInitialized())
-        return;
-
-    ScriptState::Scope scope(m_scriptState.get());
-    ASSERT(!m_document.isEmpty());
-    v8::Handle<v8::Object> documentHandle = m_document.newLocal(m_isolate);
-    checkDocumentWrapper(documentHandle, document);
-    documentHandle->SetAccessor(v8String(m_isolate, name), getter);
-}
-
-void V8WindowShell::namedItemRemoved(HTMLDocument* document, const AtomicString& name)
-{
-    ASSERT(m_world->isMainWorld());
-
-    if (!isContextInitialized())
-        return;
-
-    if (document->hasNamedItem(name) || document->hasExtraNamedItem(name))
-        return;
-
-    ScriptState::Scope scope(m_scriptState.get());
-    ASSERT(!m_document.isEmpty());
-    v8::Handle<v8::Object> documentHandle = m_document.newLocal(m_isolate);
-    checkDocumentWrapper(documentHandle, document);
-    documentHandle->Delete(v8String(m_isolate, name));
-}
-
-void V8WindowShell::updateSecurityOrigin(SecurityOrigin* origin)
-{
-    ASSERT(m_world->isMainWorld());
-    if (!isContextInitialized())
-        return;
-    setSecurityToken(origin);
-}
-
-} // namespace blink