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content / public / browser / render_view_host.h [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
#define CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
#include "build/build_config.h"
#include "content/common/content_export.h"
#include "content/public/common/drop_data.h"
#include "content/public/common/page_zoom.h"
#include "ipc/ipc_sender.h"
#include "third_party/blink/public/common/page/drag_operation.h"
#include "third_party/blink/public/mojom/frame/frame.mojom-forward.h"
namespace perfetto::protos::pbzero {
class RenderViewHost;
} // namespace perfetto::protos::pbzero
namespace content {
class RenderProcessHost;
class RenderWidgetHost;
// A RenderViewHost is responsible for creating and talking to a
// `blink::WebView` object in a child process. It exposes a high level API to
// users, for things like loading pages, adjusting the display and other browser
// functionality, which it translates into IPC messages sent over the IPC
// channel with the `blink::WebView`. It responds to all IPC messages sent by
// that `blink::WebView` and cracks them, calling a delegate object back with
// higher level types where possible.
//
// The intent of this interface is to provide a view-agnostic communication
// conduit with a renderer. This is so we can build HTML views not only as
// WebContents (see WebContents for an example) but also as views, etc.
//
// DEPRECATED: RenderViewHost is being removed as part of the SiteIsolation
// project. New code should not be added here, but to RenderWidgetHost (if it's
// about drawing or events), RenderFrameHost (if it's frame specific), or
// Page (if it's page specific).
//
// For context, please see https://crbug.com/467770 and
// https://www.chromium.org/developers/design-documents/site-isolation.
class CONTENT_EXPORT RenderViewHost {
public:
// Returns the RenderViewHost given its ID and the ID of its render process.
// Returns nullptr if the IDs do not correspond to a live RenderViewHost.
static RenderViewHost* FromID(int render_process_id, int render_view_id);
// Returns the RenderViewHost, if any, that uses the specified
// RenderWidgetHost. Returns nullptr if there is no such RenderViewHost.
static RenderViewHost* From(RenderWidgetHost* rwh);
virtual ~RenderViewHost() {}
// Returns the RenderWidgetHost for this RenderViewHost.
virtual RenderWidgetHost* GetWidget() const = 0;
// Returns the RenderProcessHost for this RenderViewHost.
virtual RenderProcessHost* GetProcess() const = 0;
// Returns the routing id for IPC use for this RenderViewHost.
//
// Implementation note: Historically, RenderViewHost was-a RenderWidgetHost,
// and shared its IPC channel and its routing ID. Although this inheritance is
// no longer so, the IPC channel is currently still shared. Expect this to
// change.
virtual int GetRoutingID() const = 0;
// Instructs the `blink::WebView` to send back updates to the preferred size.
virtual void EnablePreferredSizeMode() = 0;
using TraceProto = perfetto::protos::pbzero::RenderViewHost;
// Write a representation of this object into a trace.
virtual void WriteIntoTrace(
perfetto::TracedProto<TraceProto> context) const = 0;
private:
// This interface should only be implemented inside content.
friend class RenderViewHostImpl;
RenderViewHost() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_