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// Copyright (c) 2012 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 ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
#define ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
#include "content/public/browser/web_contents_observer.h"
#include "android_webview/common/aw_hit_test_data.h"
#include "base/callback_forward.h"
#include "base/macros.h"
#include "base/threading/non_thread_safe.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/size_f.h"
namespace android_webview {
class AwRenderViewHostExtClient {
public:
// Called when the RenderView page scale changes.
virtual void OnWebLayoutPageScaleFactorChanged(float page_scale_factor) = 0;
virtual void OnWebLayoutContentsSizeChanged(
const gfx::Size& contents_size) = 0;
protected:
virtual ~AwRenderViewHostExtClient() {}
};
// Provides RenderViewHost wrapper functionality for sending WebView-specific
// IPC messages to the renderer and from there to WebKit.
class AwRenderViewHostExt : public content::WebContentsObserver,
public base::NonThreadSafe {
public:
// To send receive messages to a RenderView we take the WebContents instance,
// as it internally handles RenderViewHost instances changing underneath us.
AwRenderViewHostExt(
AwRenderViewHostExtClient* client, content::WebContents* contents);
~AwRenderViewHostExt() override;
// |result| will be invoked with the outcome of the request.
typedef base::Callback<void(bool)> DocumentHasImagesResult;
void DocumentHasImages(DocumentHasImagesResult result);
// Clear all WebCore memory cache (not only for this view).
void ClearCache();
// Tells render process to kill itself (only for testing).
void KillRenderProcess();
// Do a hit test at the view port coordinates and asynchronously update
// |last_hit_test_data_|. Width and height in |touch_area| are in density
// independent pixels used by blink::WebView.
void RequestNewHitTestDataAt(const gfx::PointF& touch_center,
const gfx::SizeF& touch_area);
// Optimization to avoid unnecessary Java object creation on hit test.
bool HasNewHitTestData() const;
void MarkHitTestDataRead();
// Return |last_hit_test_data_|. Note that this is unavoidably racy;
// the corresponding public WebView API is as well.
const AwHitTestData& GetLastHitTestData() const;
// Sets the zoom factor for text only. Used in layout modes other than
// Text Autosizing.
void SetTextZoomFactor(float factor);
void ResetScrollAndScaleState();
// Sets the initial page scale. This overrides initial scale set by
// the meta viewport tag.
void SetInitialPageScale(double page_scale_factor);
void SetBackgroundColor(SkColor c);
void SetJsOnlineProperty(bool network_up);
void SmoothScroll(int target_x, int target_y, long duration_ms);
private:
// content::WebContentsObserver implementation.
void RenderViewCreated(content::RenderViewHost* view_host) override;
void RenderViewHostChanged(content::RenderViewHost* old_host,
content::RenderViewHost* new_host) override;
void RenderFrameCreated(content::RenderFrameHost* frame_host) override;
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
void OnPageScaleFactorChanged(float page_scale_factor) override;
bool OnMessageReceived(const IPC::Message& message,
content::RenderFrameHost* render_frame_host) override;
void OnDocumentHasImagesResponse(content::RenderFrameHost* render_frame_host,
int msg_id,
bool has_images);
void OnUpdateHitTestData(content::RenderFrameHost* render_frame_host,
const AwHitTestData& hit_test_data);
void OnContentsSizeChanged(content::RenderFrameHost* render_frame_host,
const gfx::Size& contents_size);
bool IsRenderViewReady() const;
void ClearImageRequests();
AwRenderViewHostExtClient* client_;
SkColor background_color_;
// A map from message id to result callback. Messages here are all for the
// *current* RVH.
std::map<int, DocumentHasImagesResult> image_requests_callback_map_;
// Master copy of hit test data on the browser side. This is updated
// as a result of DoHitTest called explicitly or when the FocusedNodeChanged
// is called in AwRenderViewExt.
AwHitTestData last_hit_test_data_;
bool has_new_hit_test_data_;
DISALLOW_COPY_AND_ASSIGN(AwRenderViewHostExt);
};
} // namespace android_webview
#endif // ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_