Introduce the abstract class WebViewBase, to decouple WebViewImpl.

third_party/WebKit/Source/core/exported/WebViewBase.h

+// Copyright 2017 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 WebViewBase_h
+
+#ifndef WebViewBase_h
+#define WebViewBase_h
+
+#include "platform/transforms/TransformationMatrix.h"
+#include "public/platform/WebDisplayMode.h"
+#include "public/platform/WebInputEventResult.h"
+#include "public/web/WebElement.h"
+#include "public/web/WebView.h"
+
+namespace blink {
+
+class CompositorAnimationTimeline;
+class ContextMenuProvider;
+class DevToolsEmulator;
+class Frame;
+class Page;
+class PageScaleConstraintsSet;
+class WebInputEvent;
+class WebKeyboardEvent;
+class WebLocalFrameImpl;
+class WebLayerTreeView;
+class WebPagePopupImpl;
+class WebSettingsImpl;
+struct WebRect;
+
+// WebViewBase is a temporary class introduced to decouple the defintion of
+// WebViewImpl from the concrete implementation. It was not possible to move the
+// defintion of these methods to WebView as we did not want to pollute the
+// public API surface area.
+//
+// Once WebViewImpl is moved from web to core/exported then this class should be
+// removed and clients can once again depend on WebViewImpl.
+class WebViewBase : public WebView {
+ public:
+  virtual void SetBaseBackgroundColor(WebColor) = 0;
+  virtual void SetBaseBackgroundColorOverride(WebColor) = 0;
+  virtual void ClearBaseBackgroundColorOverride() = 0;
+  virtual void SetBackgroundColorOverride(WebColor) = 0;
+  virtual void ClearBackgroundColorOverride() = 0;
+  virtual void SetZoomFactorOverride(float) = 0;
+  virtual void SetCompositorDeviceScaleFactorOverride(float) = 0;
+  virtual void SetDeviceEmulationTransform(const TransformationMatrix&) = 0;
+  virtual void SetShowDebugBorders(bool) = 0;
+
+  virtual Page* GetPage() const = 0;
+  virtual Frame* FocusedCoreFrame() const = 0;
+
+  // Returns the main frame associated with this view. This may be null when
+  // the page is shutting down, but will be valid at all other times.
+  virtual WebLocalFrameImpl* MainFrameImpl() const = 0;
+
+  virtual float DefaultMinimumPageScaleFactor() const = 0;
+  virtual float DefaultMaximumPageScaleFactor() const = 0;
+  virtual float MinimumPageScaleFactor() const = 0;
+  virtual float MaximumPageScaleFactor() const = 0;
+  virtual float ClampPageScaleFactorToLimits(float) const = 0;
+  virtual void ResetScaleStateImmediately() = 0;
+
+  virtual WebLayerTreeView* LayerTreeView() const = 0;
+  virtual WebViewClient* Client() = 0;
+
+  virtual void ZoomToFindInPageRect(const WebRect&) = 0;
+
+  virtual PageScaleConstraintsSet& GetPageScaleConstraintsSet() const = 0;
+  virtual Color BaseBackgroundColor() const = 0;
+  virtual bool BackgroundColorOverrideEnabled() const = 0;
+  virtual WebColor BackgroundColorOverride() const = 0;
+
+  virtual void DidChangeContentsSize() = 0;
+  virtual void PageScaleFactorChanged() = 0;
+  virtual void MainFrameScrollOffsetChanged() = 0;
+  virtual void UpdateMainFrameLayoutSize() = 0;
+
+  virtual DevToolsEmulator* GetDevToolsEmulator() const = 0;
+
+  // Notifies the WebView that a load has been committed. isNewNavigation
+  // will be true if a new session history item should be created for that
+  // load. isNavigationWithinPage will be true if the navigation does
+  // not take the user away from the current page.
+  virtual void DidCommitLoad(bool is_new_navigation,
+                             bool is_navigation_within_page) = 0;
+
+  virtual void ShowContextMenuAtPoint(float x,
+                                      float y,
+                                      ContextMenuProvider*) = 0;
+  virtual void ShowContextMenuForElement(WebElement) = 0;
+
+  virtual IntSize MainFrameSize() = 0;
+  virtual bool ShouldAutoResize() const = 0;
+  virtual IntSize MinAutoSize() const = 0;
+  virtual IntSize MaxAutoSize() const = 0;
+  virtual WebDisplayMode DisplayMode() const = 0;
+
+  virtual void DidUpdateFullscreenSize() = 0;
+  virtual void SetLastHiddenPagePopup(WebPagePopupImpl*) = 0;
+  virtual WebInputEventResult SendContextMenuEvent(const WebKeyboardEvent&) = 0;
+
+  virtual WebSpellCheckClient* SpellCheckClient() = 0;
+
+  virtual CompositorAnimationTimeline* LinkHighlightsTimeline() const = 0;
+
+  virtual WebSettingsImpl* SettingsImpl() = 0;
+
+  static const WebInputEvent* CurrentInputEvent();
+};
+}
+
+#endif