content/shell/test_runner/web_view_test_proxy.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_SHELL_TEST_RUNNER_WEB_VIEW_TEST_PROXY_H_
#define CONTENT_SHELL_TEST_RUNNER_WEB_VIEW_TEST_PROXY_H_

#include <memory>
#include <string>
#include <utility>

#include "base/callback.h"
#include "base/macros.h"
#include "build/build_config.h"
#include "content/renderer/render_view_impl.h"
#include "content/shell/test_runner/test_runner_export.h"
#include "content/shell/test_runner/web_view_test_client.h"
#include "content/shell/test_runner/web_widget_test_client.h"
#include "content/shell/test_runner/web_widget_test_proxy.h"
#include "third_party/blink/public/platform/web_drag_operation.h"
#include "third_party/blink/public/platform/web_rect.h"
#include "third_party/blink/public/platform/web_screen_info.h"
#include "third_party/blink/public/platform/web_url_error.h"
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/public/web/web_dom_message_event.h"
#include "third_party/blink/public/web/web_history_commit_type.h"
#include "third_party/blink/public/web/web_navigation_policy.h"
#include "third_party/blink/public/web/web_text_direction.h"
#include "third_party/blink/public/web/web_view_client.h"
#include "third_party/blink/public/web/web_widget_client.h"

namespace blink {
class WebDragData;
class WebLocalFrame;
class WebString;
class WebView;
class WebWidget;
struct WebWindowFeatures;
}

namespace test_runner {
class AccessibilityController;
class TestInterfaces;
class TestRunnerForSpecificView;
class TextInputController;
class WebTestDelegate;
class WebTestInterfaces;

// A WebWidgetClient that manages calls to a client for testing, as well as a
// real client in the WebViewTestProxy base class.
// The |base_class_widget_client| is a real production WebWidgetClient, while
// the |test_widget_client| is a test-only WebWidgetClient. Mostly calls are
// forwarded to the |base_class_widget_client|, but some are intercepted and
// sent to the |test_widget_client| instead, or to both.
class TEST_RUNNER_EXPORT ProxyWebWidgetClient : public blink::WebWidgetClient {
 public:
  ProxyWebWidgetClient(blink::WebWidgetClient* base_class_widget_client,
                       blink::WebWidgetClient* widget_test_client,
                       content::RenderWidget* render_widget);

  // blink::WebWidgetClient implementation.
  void DidInvalidateRect(const blink::WebRect&) override;
  void ScheduleAnimation() override;
  void IntrinsicSizingInfoChanged(
      const blink::WebIntrinsicSizingInfo&) override;
  void DidMeaningfulLayout(blink::WebMeaningfulLayout) override;
  void DidFirstLayoutAfterFinishedParsing() override;
  void DidChangeCursor(const blink::WebCursorInfo&) override;
  void AutoscrollStart(const blink::WebFloatPoint&) override;
  void AutoscrollFling(const blink::WebFloatSize& velocity) override;
  void AutoscrollEnd() override;
  void CloseWidgetSoon() override;
  void Show(blink::WebNavigationPolicy) override;
  blink::WebRect WindowRect() override;
  void SetWindowRect(const blink::WebRect&) override;
  blink::WebRect ViewRect() override;
  void SetToolTipText(const blink::WebString&,
                      blink::WebTextDirection hint) override;
  bool RequestPointerLock() override;
  void RequestPointerUnlock() override;
  bool IsPointerLocked() override;
  void DidHandleGestureEvent(const blink::WebGestureEvent& event,
                             bool event_cancelled) override;
  void DidOverscroll(const blink::WebFloatSize& overscroll_delta,
                     const blink::WebFloatSize& accumulated_overscroll,
                     const blink::WebFloatPoint& position_in_viewport,
                     const blink::WebFloatSize& velocity_in_viewport,
                     const cc::OverscrollBehavior& behavior) override;
  void HasTouchEventHandlers(bool) override;
  void SetNeedsLowLatencyInput(bool) override;
  void RequestUnbufferedInputEvents() override;
  void SetTouchAction(blink::WebTouchAction touch_action) override;
  void ShowVirtualKeyboardOnElementFocus() override;
  void ConvertViewportToWindow(blink::WebRect* rect) override;
  void ConvertWindowToViewport(blink::WebFloatRect* rect) override;
  void StartDragging(network::mojom::ReferrerPolicy,
                     const blink::WebDragData&,
                     blink::WebDragOperationsMask,
                     const SkBitmap& drag_image,
                     const gfx::Point& drag_image_offset) override;

 private:
  blink::WebWidgetClient* base_class_widget_client_;
  blink::WebWidgetClient* widget_test_client_;
  content::RenderWidget* render_widget_;
};

// WebViewTestProxyBase is the "brain" of WebViewTestProxy in the sense that
// WebViewTestProxy does the bridge between RenderViewImpl and
// WebViewTestProxyBase and when it requires a behavior to be different from the
// usual, it will call WebViewTestProxyBase that implements the expected
// behavior. See WebViewTestProxy class comments for more information.
//
// Uses private inheritence to ensure that code doesn't assume WebViews are
// WebWidgets, and gets to the WebWidget through an accessor instead.
class TEST_RUNNER_EXPORT WebViewTestProxyBase : private WebWidgetTestProxyBase {
 public:
  blink::WebView* web_view() { return web_view_; }
  void set_web_view(blink::WebView* view) {
    DCHECK(view);
    DCHECK(!web_view_);
    web_view_ = view;
  }

  WebTestDelegate* delegate() { return delegate_; }
  TestInterfaces* test_interfaces() { return test_interfaces_; }
  AccessibilityController* accessibility_controller() {
    return accessibility_controller_.get();
  }
  TestRunnerForSpecificView* view_test_runner() {
    return view_test_runner_.get();
  }

  void Reset();
  void BindTo(blink::WebLocalFrame* frame);

  void GetScreenOrientationForTesting(blink::WebScreenInfo&);

  WebWidgetTestProxyBase* web_widget_test_proxy_base() { return this; }

 protected:
  WebViewTestProxyBase();
  ~WebViewTestProxyBase();

  void set_delegate(WebTestDelegate* delegate) { delegate_ = delegate; }
  void set_test_interfaces(TestInterfaces* interfaces) {
    test_interfaces_ = interfaces;
  }

 private:
  TestInterfaces* test_interfaces_ = nullptr;
  WebTestDelegate* delegate_ = nullptr;
  blink::WebView* web_view_ = nullptr;
  blink::WebWidget* web_widget_ = nullptr;
  std::unique_ptr<AccessibilityController> accessibility_controller_;
  std::unique_ptr<TextInputController> text_input_controller_;
  std::unique_ptr<TestRunnerForSpecificView> view_test_runner_;

  DISALLOW_COPY_AND_ASSIGN(WebViewTestProxyBase);
};

// WebViewTestProxy is used during running web tests. The intent of that class
// is to wrap RenderViewImpl for tests purposes in order to reduce the amount of
// test specific code in the production code.
//
// WebViewTestProxy is only doing the glue between RenderViewImpl and
// WebViewTestProxyBase, that means that there is no logic living in this class
// except deciding which base class should be called (could be both).
//
// Examples of usage:
//  * when a fooClient has a mock implementation, WebViewTestProxy can override
//    the fooClient() call and have WebViewTestProxyBase return the mock
//    implementation.
//  * when a value needs to be overridden by web tests, WebViewTestProxy can
//    override RenderViewImpl's getter and call a getter from
//    WebViewTestProxyBase instead. In addition, WebViewTestProxyBase will have
//    a public setter that could be called from the TestRunner.
class TEST_RUNNER_EXPORT WebViewTestProxy : public content::RenderViewImpl,
                                            public WebViewTestProxyBase {
 public:
  template <typename... Args>
  explicit WebViewTestProxy(Args&&... args)
      : RenderViewImpl(std::forward<Args>(args)...) {}
  void Initialize(WebTestInterfaces* interfaces, WebTestDelegate* delegate);

  // WebViewClient implementation.
  blink::WebView* CreateView(blink::WebLocalFrame* creator,
                             const blink::WebURLRequest& request,
                             const blink::WebWindowFeatures& features,
                             const blink::WebString& frame_name,
                             blink::WebNavigationPolicy policy,
                             bool suppress_opener,
                             blink::WebSandboxFlags sandbox_flags,
                             const blink::SessionStorageNamespaceId&
                                 session_storage_namespace_id) override;
  void PrintPage(blink::WebLocalFrame* frame) override;
  blink::WebString AcceptLanguages() override;
  void DidFocus(blink::WebLocalFrame* calling_frame) override;
  blink::WebScreenInfo GetScreenInfo() override;
  blink::WebWidgetClient* WidgetClient() override;

  // Exposed for our TestRunner harness.
  using RenderViewImpl::ApplyPageHidden;

 private:
  // RenderViewImpl has no public destructor.
  ~WebViewTestProxy() override;

  std::unique_ptr<WebViewTestClient> view_test_client_;

  DISALLOW_COPY_AND_ASSIGN(WebViewTestProxy);
};

}  // namespace test_runner

#endif  // CONTENT_SHELL_TEST_RUNNER_WEB_VIEW_TEST_PROXY_H_