third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp

/*
 * Copyright (C) 2010-2011 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 "web/WebDevToolsAgentImpl.h"

#include "bindings/core/v8/ScriptController.h"
#include "bindings/core/v8/V8Binding.h"
#include "core/InstrumentingAgents.h"
#include "core/frame/FrameHost.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/inspector/InspectedFrames.h"
#include "core/inspector/InspectorAnimationAgent.h"
#include "core/inspector/InspectorApplicationCacheAgent.h"
#include "core/inspector/InspectorCSSAgent.h"
#include "core/inspector/InspectorDOMAgent.h"
#include "core/inspector/InspectorDOMDebuggerAgent.h"
#include "core/inspector/InspectorInputAgent.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/inspector/InspectorLayerTreeAgent.h"
#include "core/inspector/InspectorLogAgent.h"
#include "core/inspector/InspectorMemoryAgent.h"
#include "core/inspector/InspectorNetworkAgent.h"
#include "core/inspector/InspectorPageAgent.h"
#include "core/inspector/InspectorResourceContainer.h"
#include "core/inspector/InspectorResourceContentLoader.h"
#include "core/inspector/InspectorTaskRunner.h"
#include "core/inspector/InspectorTracingAgent.h"
#include "core/inspector/InspectorWorkerAgent.h"
#include "core/inspector/LayoutEditor.h"
#include "core/inspector/MainThreadDebugger.h"
#include "core/layout/api/LayoutViewItem.h"
#include "core/page/FocusController.h"
#include "core/page/Page.h"
#include "modules/accessibility/InspectorAccessibilityAgent.h"
#include "modules/cachestorage/InspectorCacheStorageAgent.h"
#include "modules/device_orientation/DeviceOrientationInspectorAgent.h"
#include "modules/indexeddb/InspectorIndexedDBAgent.h"
#include "modules/storage/InspectorDOMStorageAgent.h"
#include "modules/webdatabase/InspectorDatabaseAgent.h"
#include "platform/CrossThreadFunctional.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "platform/TraceEvent.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/paint/PaintController.h"
#include "public/platform/Platform.h"
#include "public/platform/WebLayerTreeView.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebString.h"
#include "public/web/WebDevToolsAgentClient.h"
#include "public/web/WebSettings.h"
#include "web/DevToolsEmulator.h"
#include "web/InspectorEmulationAgent.h"
#include "web/InspectorOverlay.h"
#include "web/InspectorRenderingAgent.h"
#include "web/WebFrameWidgetImpl.h"
#include "web/WebInputEventConversion.h"
#include "web/WebLocalFrameImpl.h"
#include "web/WebSettingsImpl.h"
#include "web/WebViewImpl.h"
#include "wtf/MathExtras.h"
#include "wtf/Noncopyable.h"
#include "wtf/PtrUtil.h"
#include "wtf/text/WTFString.h"
#include <memory>
#include <v8-inspector.h>

namespace blink {

namespace {

bool isMainFrame(WebLocalFrameImpl* frame) {
  // TODO(dgozman): sometimes view->mainFrameImpl() does return null, even
  // though |frame| is meant to be main frame.  See http://crbug.com/526162.
  return frame->viewImpl() && !frame->parent();
}
}

class ClientMessageLoopAdapter : public MainThreadDebugger::ClientMessageLoop {
 public:
  ~ClientMessageLoopAdapter() override { s_instance = nullptr; }

  static void ensureMainThreadDebuggerCreated(WebDevToolsAgentClient* client) {
    if (s_instance)
      return;
    std::unique_ptr<ClientMessageLoopAdapter> instance =
        wrapUnique(new ClientMessageLoopAdapter(
            wrapUnique(client->createClientMessageLoop())));
    s_instance = instance.get();
    MainThreadDebugger::instance()->setClientMessageLoop(std::move(instance));
  }

  static void webViewImplClosed(WebViewImpl* view) {
    if (s_instance)
      s_instance->m_frozenViews.remove(view);
  }

  static void webFrameWidgetImplClosed(WebFrameWidgetImpl* widget) {
    if (s_instance)
      s_instance->m_frozenWidgets.remove(widget);
  }

  static void continueProgram() {
    // Release render thread if necessary.
    if (s_instance)
      s_instance->quitNow();
  }

  static void pauseForCreateWindow(WebLocalFrameImpl* frame) {
    if (s_instance)
      s_instance->runForCreateWindow(frame);
  }

  static bool resumeForCreateWindow() {
    return s_instance ? s_instance->quitForCreateWindow() : false;
  }

 private:
  ClientMessageLoopAdapter(
      std::unique_ptr<WebDevToolsAgentClient::WebKitClientMessageLoop>
          messageLoop)
      : m_runningForDebugBreak(false),
        m_runningForCreateWindow(false),
        m_messageLoop(std::move(messageLoop)) {
    DCHECK(m_messageLoop.get());
  }

  void run(LocalFrame* frame) override {
    if (m_runningForDebugBreak)
      return;

    m_runningForDebugBreak = true;
    if (!m_runningForCreateWindow)
      runLoop(WebLocalFrameImpl::fromFrame(frame));
  }

  void runForCreateWindow(WebLocalFrameImpl* frame) {
    if (m_runningForCreateWindow)
      return;

    m_runningForCreateWindow = true;
    if (!m_runningForDebugBreak)
      runLoop(frame);
  }

  void runLoop(WebLocalFrameImpl* frame) {
    // 0. Flush pending frontend messages.
    WebDevToolsAgentImpl* agent = frame->devToolsAgentImpl();
    agent->flushProtocolNotifications();

    Vector<WebViewImpl*> views;
    HeapVector<Member<WebFrameWidgetImpl>> widgets;

    // 1. Disable input events.
    const HashSet<WebViewImpl*>& viewImpls = WebViewImpl::allInstances();
    HashSet<WebViewImpl*>::const_iterator viewImplsEnd = viewImpls.end();
    for (HashSet<WebViewImpl*>::const_iterator it = viewImpls.begin();
         it != viewImplsEnd; ++it) {
      WebViewImpl* view = *it;
      m_frozenViews.add(view);
      views.append(view);
      view->setIgnoreInputEvents(true);
      view->chromeClient().notifyPopupOpeningObservers();
    }

    const WebFrameWidgetsSet& widgetImpls = WebFrameWidgetImpl::allInstances();
    WebFrameWidgetsSet::const_iterator widgetImplsEnd = widgetImpls.end();
    for (WebFrameWidgetsSet::const_iterator it = widgetImpls.begin();
         it != widgetImplsEnd; ++it) {
      WebFrameWidgetImpl* widget = *it;
      m_frozenWidgets.add(widget);
      widgets.append(widget);
      widget->setIgnoreInputEvents(true);
    }

    // 2. Notify embedder about pausing.
    if (agent->client())
      agent->client()->willEnterDebugLoop();

    // 3. Disable active objects
    WebView::willEnterModalLoop();

    // 4. Process messages until quitNow is called.
    m_messageLoop->run();

    // 5. Resume active objects
    WebView::didExitModalLoop();

    // 6. Resume input events.
    for (Vector<WebViewImpl*>::iterator it = views.begin(); it != views.end();
         ++it) {
      if (m_frozenViews.contains(*it)) {
        // The view was not closed during the dispatch.
        (*it)->setIgnoreInputEvents(false);
      }
    }
    for (HeapVector<Member<WebFrameWidgetImpl>>::iterator it = widgets.begin();
         it != widgets.end(); ++it) {
      if (m_frozenWidgets.contains(*it)) {
        // The widget was not closed during the dispatch.
        (*it)->setIgnoreInputEvents(false);
      }
    }

    // 7. Notify embedder about resuming.
    if (agent->client())
      agent->client()->didExitDebugLoop();

    // 8. All views have been resumed, clear the set.
    m_frozenViews.clear();
    m_frozenWidgets.clear();
  }

  void quitNow() override {
    if (m_runningForDebugBreak) {
      m_runningForDebugBreak = false;
      if (!m_runningForCreateWindow)
        m_messageLoop->quitNow();
    }
  }

  bool quitForCreateWindow() {
    if (m_runningForCreateWindow) {
      m_runningForCreateWindow = false;
      if (!m_runningForDebugBreak)
        m_messageLoop->quitNow();
      return true;
    }
    return false;
  }

  void runIfWaitingForDebugger(LocalFrame* frame) override {
    // If we've paused for createWindow, handle it ourselves.
    if (quitForCreateWindow())
      return;
    // Otherwise, pass to the client (embedded workers do it differently).
    WebDevToolsAgentImpl* agent =
        WebLocalFrameImpl::fromFrame(frame)->devToolsAgentImpl();
    if (agent && agent->client())
      agent->client()->resumeStartup();
  }

  bool m_runningForDebugBreak;
  bool m_runningForCreateWindow;
  std::unique_ptr<WebDevToolsAgentClient::WebKitClientMessageLoop>
      m_messageLoop;
  typedef HashSet<WebViewImpl*> FrozenViewsSet;
  FrozenViewsSet m_frozenViews;
  WebFrameWidgetsSet m_frozenWidgets;
  static ClientMessageLoopAdapter* s_instance;
};

ClientMessageLoopAdapter* ClientMessageLoopAdapter::s_instance = nullptr;

// static
WebDevToolsAgentImpl* WebDevToolsAgentImpl::create(
    WebLocalFrameImpl* frame,
    WebDevToolsAgentClient* client) {
  if (!isMainFrame(frame)) {
    WebDevToolsAgentImpl* agent =
        new WebDevToolsAgentImpl(frame, client, nullptr, false);
    if (frame->frameWidget())
      agent->layerTreeViewChanged(
          toWebFrameWidgetImpl(frame->frameWidget())->layerTreeView());
    return agent;
  }

  WebViewImpl* view = frame->viewImpl();
  WebDevToolsAgentImpl* agent = new WebDevToolsAgentImpl(
      frame, client, InspectorOverlay::create(view), true);
  agent->layerTreeViewChanged(view->layerTreeView());
  return agent;
}

WebDevToolsAgentImpl::WebDevToolsAgentImpl(WebLocalFrameImpl* webLocalFrameImpl,
                                           WebDevToolsAgentClient* client,
                                           InspectorOverlay* overlay,
                                           bool includeViewAgents)
    : m_client(client),
      m_webLocalFrameImpl(webLocalFrameImpl),
      m_instrumentingAgents(
          m_webLocalFrameImpl->frame()->instrumentingAgents()),
      m_resourceContentLoader(
          InspectorResourceContentLoader::create(m_webLocalFrameImpl->frame())),
      m_overlay(overlay),
      m_inspectedFrames(InspectedFrames::create(m_webLocalFrameImpl->frame())),
      m_resourceContainer(new InspectorResourceContainer(m_inspectedFrames)),
      m_domAgent(nullptr),
      m_pageAgent(nullptr),
      m_networkAgent(nullptr),
      m_layerTreeAgent(nullptr),
      m_tracingAgent(nullptr),
      m_includeViewAgents(includeViewAgents),
      m_layerTreeId(0) {
  DCHECK(isMainThread());
  DCHECK(m_webLocalFrameImpl->frame());
}

WebDevToolsAgentImpl::~WebDevToolsAgentImpl() {
  DCHECK(!m_client);
}

// static
void WebDevToolsAgentImpl::webViewImplClosed(WebViewImpl* webViewImpl) {
  ClientMessageLoopAdapter::webViewImplClosed(webViewImpl);
}

// static
void WebDevToolsAgentImpl::webFrameWidgetImplClosed(
    WebFrameWidgetImpl* webFrameWidgetImpl) {
  ClientMessageLoopAdapter::webFrameWidgetImplClosed(webFrameWidgetImpl);
}

DEFINE_TRACE(WebDevToolsAgentImpl) {
  visitor->trace(m_webLocalFrameImpl);
  visitor->trace(m_instrumentingAgents);
  visitor->trace(m_resourceContentLoader);
  visitor->trace(m_overlay);
  visitor->trace(m_inspectedFrames);
  visitor->trace(m_resourceContainer);
  visitor->trace(m_domAgent);
  visitor->trace(m_pageAgent);
  visitor->trace(m_networkAgent);
  visitor->trace(m_layerTreeAgent);
  visitor->trace(m_tracingAgent);
  visitor->trace(m_session);
}

void WebDevToolsAgentImpl::willBeDestroyed() {
  DCHECK(m_webLocalFrameImpl->frame());
  DCHECK(m_inspectedFrames->root()->view());
  detach();
  m_resourceContentLoader->dispose();
  m_client = nullptr;
}

void WebDevToolsAgentImpl::initializeSession(int sessionId,
                                             const String& hostId,
                                             String* state) {
  DCHECK(m_client);
  ClientMessageLoopAdapter::ensureMainThreadDebuggerCreated(m_client);
  MainThreadDebugger* mainThreadDebugger = MainThreadDebugger::instance();
  v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();

  m_session = new InspectorSession(
      this, m_instrumentingAgents.get(), sessionId,
      mainThreadDebugger->v8Inspector(),
      mainThreadDebugger->contextGroupId(m_inspectedFrames->root()), state);

  InspectorDOMAgent* domAgent =
      new InspectorDOMAgent(isolate, m_inspectedFrames.get(),
                            m_session->v8Session(), m_overlay.get());
  m_domAgent = domAgent;
  m_session->append(domAgent);

  InspectorLayerTreeAgent* layerTreeAgent =
      InspectorLayerTreeAgent::create(m_inspectedFrames.get());
  m_layerTreeAgent = layerTreeAgent;
  m_session->append(layerTreeAgent);

  InspectorNetworkAgent* networkAgent =
      InspectorNetworkAgent::create(m_inspectedFrames.get());
  m_networkAgent = networkAgent;
  m_session->append(networkAgent);

  InspectorCSSAgent* cssAgent = InspectorCSSAgent::create(
      m_domAgent, m_inspectedFrames.get(), m_networkAgent,
      m_resourceContentLoader.get(), m_resourceContainer.get());
  m_session->append(cssAgent);

  m_session->append(new InspectorAnimationAgent(
      m_inspectedFrames.get(), m_domAgent, cssAgent, m_session->v8Session()));

  m_session->append(InspectorMemoryAgent::create());

  m_session->append(
      InspectorApplicationCacheAgent::create(m_inspectedFrames.get()));

  m_session->append(new InspectorIndexedDBAgent(m_inspectedFrames.get(),
                                                m_session->v8Session()));

  InspectorWorkerAgent* workerAgent =
      new InspectorWorkerAgent(m_inspectedFrames.get());
  m_session->append(workerAgent);

  InspectorTracingAgent* tracingAgent =
      InspectorTracingAgent::create(this, workerAgent, m_inspectedFrames.get());
  m_tracingAgent = tracingAgent;
  m_session->append(tracingAgent);

  m_session->append(new InspectorDOMDebuggerAgent(isolate, m_domAgent,
                                                  m_session->v8Session()));

  m_session->append(InspectorInputAgent::create(m_inspectedFrames.get()));

  InspectorPageAgent* pageAgent = InspectorPageAgent::create(
      m_inspectedFrames.get(), this, m_resourceContentLoader.get(),
      m_session->v8Session());
  m_pageAgent = pageAgent;
  m_session->append(pageAgent);

  m_session->append(new InspectorLogAgent(
      &m_inspectedFrames->root()->host()->consoleMessageStorage()));

  m_tracingAgent->setLayerTreeId(m_layerTreeId);
  m_networkAgent->setHostId(hostId);

  if (m_includeViewAgents) {
    // TODO(dgozman): we should actually pass the view instead of frame, but
    // during remote->local transition we cannot access mainFrameImpl() yet, so
    // we have to store the frame which will become the main frame later.
    m_session->append(
        InspectorRenderingAgent::create(m_webLocalFrameImpl, m_overlay.get()));
    m_session->append(
        InspectorEmulationAgent::create(m_webLocalFrameImpl, this));
    // TODO(dgozman): migrate each of the following agents to frame once module
    // is ready.
    Page* page = m_webLocalFrameImpl->viewImpl()->page();
    m_session->append(InspectorDatabaseAgent::create(page));
    m_session->append(DeviceOrientationInspectorAgent::create(page));
    m_session->append(new InspectorAccessibilityAgent(page, m_domAgent));
    m_session->append(InspectorDOMStorageAgent::create(page));
    m_session->append(InspectorCacheStorageAgent::create());
  }

  if (m_overlay)
    m_overlay->init(cssAgent, m_session->v8Session(), m_domAgent);

  Platform::current()->currentThread()->addTaskObserver(this);
}

void WebDevToolsAgentImpl::destroySession() {
  if (m_overlay)
    m_overlay->clear();

  m_tracingAgent.clear();
  m_layerTreeAgent.clear();
  m_networkAgent.clear();
  m_pageAgent.clear();
  m_domAgent.clear();

  m_session->dispose();
  m_session.clear();

  Platform::current()->currentThread()->removeTaskObserver(this);
}

void WebDevToolsAgentImpl::attach(const WebString& hostId, int sessionId) {
  if (attached())
    return;
  initializeSession(sessionId, hostId, nullptr);
}

void WebDevToolsAgentImpl::reattach(const WebString& hostId,
                                    int sessionId,
                                    const WebString& savedState) {
  if (attached())
    return;
  String state = savedState;
  initializeSession(sessionId, hostId, &state);
  m_session->restore();
}

void WebDevToolsAgentImpl::detach() {
  if (!attached())
    return;
  destroySession();
}

void WebDevToolsAgentImpl::continueProgram() {
  ClientMessageLoopAdapter::continueProgram();
}

void WebDevToolsAgentImpl::didCommitLoadForLocalFrame(LocalFrame* frame) {
  m_resourceContainer->didCommitLoadForLocalFrame(frame);
  m_resourceContentLoader->didCommitLoadForLocalFrame(frame);
  if (m_session)
    m_session->didCommitLoadForLocalFrame(frame);
}

void WebDevToolsAgentImpl::didStartProvisionalLoad(LocalFrame* frame) {
  if (m_session && m_inspectedFrames->root() == frame)
    m_session->v8Session()->resume();
}

bool WebDevToolsAgentImpl::screencastEnabled() {
  return m_pageAgent && m_pageAgent->screencastEnabled();
}

void WebDevToolsAgentImpl::willAddPageOverlay(const GraphicsLayer* layer) {
  if (m_layerTreeAgent)
    m_layerTreeAgent->willAddPageOverlay(layer);
}

void WebDevToolsAgentImpl::didRemovePageOverlay(const GraphicsLayer* layer) {
  if (m_layerTreeAgent)
    m_layerTreeAgent->didRemovePageOverlay(layer);
}

void WebDevToolsAgentImpl::rootLayerCleared() {
  if (m_tracingAgent)
    m_tracingAgent->rootLayerCleared();
}

void WebDevToolsAgentImpl::layerTreeViewChanged(
    WebLayerTreeView* layerTreeView) {
  m_layerTreeId = layerTreeView ? layerTreeView->layerTreeId() : 0;
  if (m_tracingAgent)
    m_tracingAgent->setLayerTreeId(m_layerTreeId);
}

void WebDevToolsAgentImpl::enableTracing(const String& categoryFilter) {
  if (m_client)
    m_client->enableTracing(categoryFilter);
}

void WebDevToolsAgentImpl::disableTracing() {
  if (m_client)
    m_client->disableTracing();
}

void WebDevToolsAgentImpl::showReloadingBlanket() {
  if (m_overlay)
    m_overlay->showReloadingBlanket();
}

void WebDevToolsAgentImpl::hideReloadingBlanket() {
  if (m_overlay)
    m_overlay->hideReloadingBlanket();
}

void WebDevToolsAgentImpl::setCPUThrottlingRate(double rate) {
  if (m_client)
    m_client->setCPUThrottlingRate(rate);
}

void WebDevToolsAgentImpl::dispatchOnInspectorBackend(
    int sessionId,
    int callId,
    const WebString& method,
    const WebString& message) {
  if (!attached())
    return;
  if (WebDevToolsAgent::shouldInterruptForMethod(method))
    MainThreadDebugger::instance()->taskRunner()->runAllTasksDontWait();
  else
    dispatchMessageFromFrontend(sessionId, method, message);
}

void WebDevToolsAgentImpl::dispatchMessageFromFrontend(int sessionId,
                                                       const String& method,
                                                       const String& message) {
  if (!attached() || sessionId != m_session->sessionId())
    return;
  InspectorTaskRunner::IgnoreInterruptsScope scope(
      MainThreadDebugger::instance()->taskRunner());
  m_session->dispatchProtocolMessage(method, message);
}

void WebDevToolsAgentImpl::inspectElementAt(int sessionId,
                                            const WebPoint& pointInRootFrame) {
  if (!m_domAgent || !m_session || m_session->sessionId() != sessionId)
    return;
  HitTestRequest::HitTestRequestType hitType =
      HitTestRequest::Move | HitTestRequest::ReadOnly |
      HitTestRequest::AllowChildFrameContent;
  HitTestRequest request(hitType);
  WebMouseEvent dummyEvent;
  dummyEvent.type = WebInputEvent::MouseDown;
  dummyEvent.x = pointInRootFrame.x;
  dummyEvent.y = pointInRootFrame.y;
  IntPoint transformedPoint =
      PlatformMouseEventBuilder(m_webLocalFrameImpl->frameView(), dummyEvent)
          .position();
  HitTestResult result(
      request,
      m_webLocalFrameImpl->frameView()->rootFrameToContents(transformedPoint));
  m_webLocalFrameImpl->frame()->contentLayoutItem().hitTest(result);
  Node* node = result.innerNode();
  if (!node && m_webLocalFrameImpl->frame()->document())
    node = m_webLocalFrameImpl->frame()->document()->documentElement();
  m_domAgent->inspect(node);
}

void WebDevToolsAgentImpl::failedToRequestDevTools() {
  ClientMessageLoopAdapter::resumeForCreateWindow();
}

void WebDevToolsAgentImpl::sendProtocolMessage(int sessionId,
                                               int callId,
                                               const String& response,
                                               const String& state) {
  ASSERT(attached());
  if (m_client)
    m_client->sendProtocolMessage(sessionId, callId, response, state);
}

void WebDevToolsAgentImpl::pageLayoutInvalidated(bool resized) {
  if (m_overlay)
    m_overlay->pageLayoutInvalidated(resized);
}

void WebDevToolsAgentImpl::configureOverlay(bool suspended,
                                            const String& message) {
  if (!m_overlay)
    return;
  m_overlay->setPausedInDebuggerMessage(message);
  if (suspended)
    m_overlay->suspend();
  else
    m_overlay->resume();
}

void WebDevToolsAgentImpl::waitForCreateWindow(LocalFrame* frame) {
  if (!attached())
    return;
  if (m_client &&
      m_client->requestDevToolsForFrame(WebLocalFrameImpl::fromFrame(frame)))
    ClientMessageLoopAdapter::pauseForCreateWindow(m_webLocalFrameImpl);
}

WebString WebDevToolsAgentImpl::evaluateInWebInspectorOverlay(
    const WebString& script) {
  if (!m_overlay)
    return WebString();

  return m_overlay->evaluateInOverlayForTest(script);
}

void WebDevToolsAgentImpl::flushProtocolNotifications() {
  if (m_session)
    m_session->flushProtocolNotifications();
}

void WebDevToolsAgentImpl::willProcessTask() {
  if (!attached())
    return;
  ThreadDebugger::idleFinished(V8PerIsolateData::mainThreadIsolate());
}

void WebDevToolsAgentImpl::didProcessTask() {
  if (!attached())
    return;
  ThreadDebugger::idleStarted(V8PerIsolateData::mainThreadIsolate());
  flushProtocolNotifications();
}

void WebDevToolsAgentImpl::runDebuggerTask(
    int sessionId,
    std::unique_ptr<WebDevToolsAgent::MessageDescriptor> descriptor) {
  WebDevToolsAgent* webagent = descriptor->agent();
  if (!webagent)
    return;

  WebDevToolsAgentImpl* agentImpl =
      static_cast<WebDevToolsAgentImpl*>(webagent);
  if (agentImpl->attached())
    agentImpl->dispatchMessageFromFrontend(sessionId, descriptor->method(),
                                           descriptor->message());
}

void WebDevToolsAgent::interruptAndDispatch(int sessionId,
                                            MessageDescriptor* rawDescriptor) {
  // rawDescriptor can't be a std::unique_ptr because interruptAndDispatch is a
  // WebKit API function.
  MainThreadDebugger::interruptMainThreadAndRun(
      crossThreadBind(WebDevToolsAgentImpl::runDebuggerTask, sessionId,
                      passed(wrapUnique(rawDescriptor))));
}

bool WebDevToolsAgent::shouldInterruptForMethod(const WebString& method) {
  return method == "Debugger.pause" || method == "Debugger.setBreakpoint" ||
         method == "Debugger.setBreakpointByUrl" ||
         method == "Debugger.removeBreakpoint" ||
         method == "Debugger.setBreakpointsActive";
}

}  // namespace blink