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// Copyright (c) 2006-2008 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 CHROME_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
#define CHROME_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
#include <windows.h>
#include "base/shared_memory.h"
#include "chrome/common/render_messages.h"
namespace gfx {
class Rect;
class Size;
}
namespace IPC {
class Message;
}
class RenderProcessHost;
class RenderWidgetHost;
class WebCursor;
///////////////////////////////////////////////////////////////////////////////
//
// RenderWidgetHostView
//
// RenderWidgetHostView is an interface implemented by an object that acts as
// the "View" portion of a RenderWidgetHost. The RenderWidgetHost and its
// associated RenderProcessHost own the "Model" in this case which is the
// child renderer process. The View is responsible for receiving events from
// the surrounding environment and passing them to the RenderWidgetHost, and
// for actually displaying the content of the RenderWidgetHost when it
// changes.
//
///////////////////////////////////////////////////////////////////////////////
class RenderWidgetHostView {
public:
// Platform-specific creator. Use this to construct new RenderWidgetHostViews
// rather than using RenderWidgetHostViewWin & friends.
//
// The RenderWidgetHost must already be created (because we can't know if it's
// going to be a regular RenderWidgetHost or a RenderViewHost (a subclass).
static RenderWidgetHostView* CreateViewForWidget(RenderWidgetHost* widget);
// Returns the associated RenderWidgetHost.
virtual RenderWidgetHost* GetRenderWidgetHost() const = 0;
// Notifies the View that it has become visible.
virtual void DidBecomeSelected() = 0;
// Notifies the View that it has been hidden.
virtual void WasHidden() = 0;
// Tells the View to size itself to the specified size.
virtual void SetSize(const gfx::Size& size) = 0;
// Retrieves the HWND used to contain plugin HWNDs.
virtual HWND GetPluginHWND() = 0;
// Sends the specified mouse event to the renderer.
virtual void ForwardMouseEventToRenderer(UINT message,
WPARAM wparam,
LPARAM lparam) = 0;
// Actually set/take focus to/from the associated View component.
virtual void Focus() = 0;
virtual void Blur() = 0;
// Returns true if the View currently has the focus.
virtual bool HasFocus() = 0;
// Shows/hides the view.
virtual void Show() = 0;
virtual void Hide() = 0;
// Retrieve the bounds of the View, in screen coordinates.
virtual gfx::Rect GetViewBounds() const = 0;
// Sets the cursor to the one associated with the specified cursor_type
virtual void UpdateCursor(const WebCursor& cursor) = 0;
// Updates the displayed cursor to the current one.
virtual void UpdateCursorIfOverSelf() = 0;
// Indicates whether the page has finished loading.
virtual void SetIsLoading(bool is_loading) = 0;
// Enable or disable IME for the view.
virtual void IMEUpdateStatus(ViewHostMsg_ImeControl control,
const gfx::Rect& caret_rect) = 0;
// Informs the view that a portion of the widget's backing store was painted.
virtual void DidPaintRect(const gfx::Rect& rect) = 0;
// Informs the view that a portion of the widget's backing store was scrolled
// by dx pixels horizontally and dy pixels vertically.
virtual void DidScrollRect(
const gfx::Rect& rect, int dx, int dy) = 0;
// Notifies the View that the renderer has ceased to exist.
virtual void RendererGone() = 0;
// Tells the View to destroy itself.
virtual void Destroy() = 0;
// Tells the View that the tooltip text for the current mouse position over
// the page has changed.
virtual void SetTooltipText(const std::wstring& tooltip_text) = 0;
protected:
// Interface class only, do not construct.
RenderWidgetHostView() {}
private:
DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostView);
};
#endif // #ifndef CHROME_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
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