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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_BROWSER_RENDER_WIDGET_HOST_DELEGATE_H_
#define CONTENT_BROWSER_RENDER_WIDGET_HOST_DELEGATE_H_
#include "base/basictypes.h"
#include "build/build_config.h"
#include "content/common/content_export.h"
#include "ui/gfx/native_widget_types.h"
namespace blink {
class WebMouseWheelEvent;
class WebGestureEvent;
}
namespace content {
class BrowserAccessibilityManager;
class RenderWidgetHostImpl;
struct NativeWebKeyboardEvent;
//
// RenderWidgetHostDelegate
//
// An interface implemented by an object interested in knowing about the state
// of the RenderWidgetHost.
class CONTENT_EXPORT RenderWidgetHostDelegate {
public:
// The RenderWidgetHost is going to be deleted.
virtual void RenderWidgetDeleted(RenderWidgetHostImpl* render_widget_host) {}
// The RenderWidgetHost got the focus.
virtual void RenderWidgetGotFocus(RenderWidgetHostImpl* render_widget_host) {}
// Callback to give the browser a chance to handle the specified keyboard
// event before sending it to the renderer.
// Returns true if the |event| was handled. Otherwise, if the |event| would
// be handled in HandleKeyboardEvent() method as a normal keyboard shortcut,
// |*is_keyboard_shortcut| should be set to true.
virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
bool* is_keyboard_shortcut);
// Callback to inform the browser that the renderer did not process the
// specified events. This gives an opportunity to the browser to process the
// event (used for keyboard shortcuts).
virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {}
// Callback to inform the browser that the renderer did not process the
// specified mouse wheel event. Returns true if the browser has handled
// the event itself.
virtual bool HandleWheelEvent(const blink::WebMouseWheelEvent& event);
// Callback to give the browser a chance to handle the specified gesture
// event before sending it to the renderer.
// Returns true if the |event| was handled.
virtual bool PreHandleGestureEvent(const blink::WebGestureEvent& event);
// Callback to inform the browser that the renderer did not process the
// specified gesture event. Returns true if the |event| was handled.
virtual bool HandleGestureEvent(const blink::WebGestureEvent& event);
// Notifies that screen rects were sent to renderer process.
virtual void DidSendScreenRects(RenderWidgetHostImpl* rwh) {}
// Get the root BrowserAccessibilityManager for this frame tree.
virtual BrowserAccessibilityManager* GetRootBrowserAccessibilityManager();
// Get the root BrowserAccessibilityManager for this frame tree,
// or create it if it doesn't exist.
virtual BrowserAccessibilityManager*
GetOrCreateRootBrowserAccessibilityManager();
#if defined(OS_WIN)
virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
#endif
protected:
virtual ~RenderWidgetHostDelegate() {}
};
} // namespace content
#endif // CONTENT_BROWSER_RENDER_WIDGET_HOST_DELEGATE_H_
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