Move content/renderer input handling for web input events to ui

content/renderer/input/synchronous_input_handler_proxy.h

-// Copyright 2015 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_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_
-#define CONTENT_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_
-
-#include "base/time/time.h"
-#include "content/common/content_export.h"
-
-namespace gfx {
-class ScrollOffset;
-class SizeF;
-}
-
-namespace content {
-
-class CONTENT_EXPORT SynchronousInputHandler {
- public:
-  virtual ~SynchronousInputHandler() {}
-
-  // Informs the Android WebView embedder that a fling animation is running, and
-  // that it should call SynchronouslyAnimate() if it wants to execute that
-  // animation. The embedder/app may choose to override and ignore the
-  // request for animation.
-  virtual void SetNeedsSynchronousAnimateInput() = 0;
-
-  // Informs the Android WebView embedder of the current root scroll and page
-  // scale state.
-  virtual void UpdateRootLayerState(
-      const gfx::ScrollOffset& total_scroll_offset,
-      const gfx::ScrollOffset& max_scroll_offset,
-      const gfx::SizeF& scrollable_size,
-      float page_scale_factor,
-      float min_page_scale_factor,
-      float max_page_scale_factor) = 0;
-};
-
-// Android WebView requires synchronous scrolling from the WebView application.
-// This interface provides support for that behaviour. The WebView embedder will
-// act as the InputHandler for controlling the timing of input (fling)
-// animations.
-class CONTENT_EXPORT SynchronousInputHandlerProxy {
- public:
-  virtual ~SynchronousInputHandlerProxy() {}
-
-  // Tell the proxy that we will control the timing of root fling animations
-  // from the SynchronousInputHandler. Once this is set, the InputHandler is
-  // not requested to Animate() the InputHandlerProxy for root layer flings.
-  // Instead, requests for animation will go to the SynchronousInputHandler and
-  // animation ticks will only come back through SynchronouslyAnimate().
-  // Non-root flings are not affected.
-  virtual void SetOnlySynchronouslyAnimateRootFlings(
-      SynchronousInputHandler* synchronous_input_handler) = 0;
-
-  // Tick input (fling) animations. This may happen out of phase with the frame
-  // timing, or not at all, as it is controlled by the WebView application. When
-  // it returns, it expects the animation scroll offsets to be visible to the
-  // application.
-  virtual void SynchronouslyAnimate(base::TimeTicks time) = 0;
-
-  // Called when the synchronous input handler wants to change the root scroll
-  // offset. Since it has the final say, this overrides values from compositor-
-  // controlled behaviour. After the offset is applied, the
-  // SynchronousInputHandler should be given back the result in case it differs
-  // from what was sent.
-  virtual void SynchronouslySetRootScrollOffset(
-      const gfx::ScrollOffset& root_offset) = 0;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_