Add Frame and RemoteFrame classes.

Source/core/frame/Frame.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.

[eseidel, 2014/03/04 01:33:00]

We can't re-license existing code.  Please copy the original license block from
Frame.cpp.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/frame/Frame.h"
+
+#include "core/dom/DocumentType.h"
+#include "core/events/Event.h"
+#include "core/frame/DOMWindow.h"
+#include "core/frame/FrameDestructionObserver.h"
+#include "core/frame/FrameHost.h"
+#include "core/frame/Settings.h"
+#include "core/html/HTMLFrameElementBase.h"
+#include "core/inspector/InspectorInstrumentation.h"
+#include "core/loader/EmptyClients.h"
+#include "core/loader/FrameLoaderClient.h"
+#include "core/page/Chrome.h"
+#include "core/page/ChromeClient.h"
+#include "core/page/EventHandler.h"
+#include "core/page/FocusController.h"
+#include "core/page/Page.h"
+#include "core/rendering/RenderView.h"
+#include "public/platform/WebLayer.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/RefCountedLeakCounter.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+namespace {
+
+int64_t generateFrameID()
+{
+    // Initialize to the current time to reduce the likelihood of generating
+    // identifiers that overlap with those from past/future browser sessions.
+    static int64_t next = static_cast<int64_t>(currentTime() * 1000000.0);
+    return ++next;
+}
+
+} // namespace
+
+DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, frameCounter, ("Frame"));
+
+Frame::Frame(PassRefPtr<FrameInit> frameInit)
+    : m_frameInit(frameInit)
+    , m_host(m_frameInit->frameHost())
+    , m_frameID(generateFrameID())
+    , m_remotePlatformLayer(0)
+{
+    ASSERT(page());
+
+#ifndef NDEBUG
+    frameCounter.increment();
+#endif
+}
+
+Frame::~Frame()
+{
+    setDOMWindow(nullptr);
+
+    // FIXME: We should not be doing all this work inside the destructor
+
+#ifndef NDEBUG
+    frameCounter.decrement();
+#endif
+
+    HashSet<FrameDestructionObserver*>::iterator stop = m_destructionObservers.end();
+    for (HashSet<FrameDestructionObserver*>::iterator it = m_destructionObservers.begin(); it != stop; ++it)
+        (*it)->frameDestroyed();
+}
+
+void Frame::addDestructionObserver(FrameDestructionObserver* observer)
+{
+    m_destructionObservers.add(observer);
+}
+
+void Frame::removeDestructionObserver(FrameDestructionObserver* observer)
+{
+    m_destructionObservers.remove(observer);
+}
+
+FrameHost* Frame::host() const
+{
+    return m_host;
+}
+
+Page* Frame::page() const
+{
+    if (m_host)
+        return &m_host->page();
+    return 0;
+}
+
+Settings* Frame::settings() const
+{
+    if (m_host)
+        return &m_host->settings();
+    return 0;
+}
+
+void Frame::setDOMWindow(PassRefPtr<DOMWindow> domWindow)
+{
+    if (m_domWindow)
+        m_domWindow->reset();
+    m_domWindow = domWindow;
+}
+
+static ChromeClient& emptyChromeClient()
+{
+    DEFINE_STATIC_LOCAL(EmptyChromeClient, client, ());
+    return client;
+}
+
+ChromeClient& Frame::chromeClient() const
+{
+    if (Page* page = this->page())
+        return page->chrome().client();
+    return emptyChromeClient();
+}
+
+Document* Frame::document() const
+{
+    return m_domWindow ? m_domWindow->document() : 0;
+}
+
+RenderView* Frame::contentRenderer() const
+{
+    return document() ? document()->renderView() : 0;
+}
+
+void Frame::willDetachFrameHost()
+{
+    HashSet<FrameDestructionObserver*>::iterator stop = m_destructionObservers.end();
+    for (HashSet<FrameDestructionObserver*>::iterator it = m_destructionObservers.begin(); it != stop; ++it)
+        (*it)->willDetachFrameHost();
+
+    // FIXME: Page should take care of updating focus/scrolling instead of Frame.
+    // FIXME: It's unclear as to why this is called more than once, but it is,
+    // so page() could be null.
+    if (page() && page()->focusController().focusedFrame() == this)
+        page()->focusController().setFocusedFrame(nullptr);
+}
+
+void Frame::detachFromFrameHost()
+{
+    m_host = 0;
+}
+
+bool Frame::isMainFrame() const
+{
+    Page* page = this->page();
+    return page && this == page->mainFrame();
+}
+
+} // namespace WebCore