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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 CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
#define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
#pragma once
#if defined(TOOLKIT_GTK)
#include <gdk/gdk.h>
#endif
#include "content/common/content_export.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkRegion.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "ui/gfx/native_widget_types.h"
class BrowserAccessibilityManager;
namespace gfx {
class Rect;
class Size;
}
namespace content {
class RenderWidgetHost;
// 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.
//
// RenderWidgetHostView Class Hierarchy:
// RenderWidgetHostView - Public interface.
// RenderWidgetHostViewPort - Private interface for content/ and ports.
// RenderWidgetHostViewBase - Common implementation between platforms.
// RenderWidgetHostViewWin, ... - Platform specific implementations.
class CONTENT_EXPORT RenderWidgetHostView {
public:
virtual ~RenderWidgetHostView() {}
// Platform-specific creator. Use this to construct new RenderWidgetHostViews
// rather than using RenderWidgetHostViewWin & friends.
//
// This function must NOT size it, because the RenderView in the renderer
// wouldn't have been created yet. The widget would set its "waiting for
// resize ack" flag, and the ack would never come becasue no RenderView
// received it.
//
// 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);
// Initialize this object for use as a drawing area. |parent_view| may be
// left as NULL on platforms where a parent view is not required to initialize
// a child window.
virtual void InitAsChild(gfx::NativeView parent_view) = 0;
// Returns the associated RenderWidgetHost.
virtual RenderWidgetHost* GetRenderWidgetHost() const = 0;
// Tells the View to size itself to the specified size.
virtual void SetSize(const gfx::Size& size) = 0;
// Tells the View to size and move itself to the specified size and point in
// screen space.
virtual void SetBounds(const gfx::Rect& rect) = 0;
// Retrieves the native view used to contain plugins and identify the
// renderer in IPC messages.
virtual gfx::NativeView GetNativeView() const = 0;
virtual gfx::NativeViewId GetNativeViewId() const = 0;
virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
// Set focus to the associated View component.
virtual void Focus() = 0;
// Returns true if the View currently has the focus.
virtual bool HasFocus() const = 0;
// Shows/hides the view. These must always be called together in pairs.
// It is not legal to call Hide() multiple times in a row.
virtual void Show() = 0;
virtual void Hide() = 0;
// Whether the view is showing.
virtual bool IsShowing() = 0;
// Retrieve the bounds of the View, in screen coordinates.
virtual gfx::Rect GetViewBounds() const = 0;
// Returns true if the View's context menu is showing.
virtual bool IsShowingContextMenu() const = 0;
// Tells the View whether the context menu is showing.
virtual void SetShowingContextMenu(bool showing) = 0;
#if defined(OS_MACOSX)
// Set the view's active state (i.e., tint state of controls).
virtual void SetActive(bool active) = 0;
// Tells the view whether or not to accept first responder status. If |flag|
// is true, the view does not accept first responder status and instead
// manually becomes first responder when it receives a mouse down event. If
// |flag| is false, the view participates in the key-view chain as normal.
virtual void SetTakesFocusOnlyOnMouseDown(bool flag) = 0;
// Notifies the view that its enclosing window has changed visibility
// (minimized/unminimized, app hidden/unhidden, etc).
// TODO(stuartmorgan): This is a temporary plugin-specific workaround for
// <http://crbug.com/34266>. Once that is fixed, this (and the corresponding
// message and renderer-side handling) can be removed in favor of using
// WasHidden/DidBecomeSelected.
virtual void SetWindowVisibility(bool visible) = 0;
// Informs the view that its containing window's frame changed.
virtual void WindowFrameChanged() = 0;
#endif // defined(OS_MACOSX)
#if defined(TOOLKIT_GTK)
// Gets the event for the last mouse down.
virtual GdkEventButton* GetLastMouseDown() = 0;
// Builds a submenu containing all the gtk input method commands.
virtual gfx::NativeView BuildInputMethodsGtkMenu() = 0;
#endif // defined(TOOLKIT_GTK)
// Subclasses should override this method to do what is appropriate to set
// the custom background for their platform.
virtual void SetBackground(const SkBitmap& background) = 0;
virtual const SkBitmap& GetBackground() = 0;
#if defined(OS_WIN) && !defined(USE_AURA)
// The region specified will be transparent to mouse clicks.
virtual void SetClickthroughRegion(SkRegion* region) {}
#endif
// Return value indicates whether the mouse is locked successfully or not.
virtual bool LockMouse() = 0;
virtual void UnlockMouse() = 0;
// Returns true if the mouse pointer is currently locked.
virtual bool IsMouseLocked() = 0;
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
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