// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2011 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 CEF_LIBCEF_BROWSER_RENDER_WIDGET_HOST_VIEW_OSR_H_
#define CEF_LIBCEF_BROWSER_RENDER_WIDGET_HOST_VIEW_OSR_H_
#pragma once

#include <vector>

#include "include/cef_base.h"
#include "include/cef_browser.h"

#include "base/memory/weak_ptr.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"

namespace content {
  class RenderWidgetHost;
  class BackingStore;
}

class CefBrowserHostImpl;
class CefWebContentsViewOSR;

///////////////////////////////////////////////////////////////////////////////
// CefRenderWidgetHostViewOSR
//
//  An object representing the "View" of a rendered web page. This object is
//  responsible for sending paint events to the the CefRenderHandler
//  when window rendering is disabled. It is the implementation of the
//  RenderWidgetHostView that the cross-platform RenderWidgetHost object uses
//  to display the data.
//
//  Comment excerpted from render_widget_host.h:
//
//    "The lifetime of the RenderWidgetHostHWND is tied to the render process.
//     If the render process dies, the RenderWidgetHostHWND goes away and all
//     references to it must become NULL."
//
// RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
///////////////////////////////////////////////////////////////////////////////

class CefRenderWidgetHostViewOSR : public content::RenderWidgetHostViewBase {
#if defined(OS_MACOSX)
 public:
  NSTextInputContext* GetNSTextInputContext();
  void HandleKeyEventBeforeTextInputClient(CefEventHandle keyEvent);
  void HandleKeyEventAfterTextInputClient(CefEventHandle keyEvent);

  bool GetCachedFirstRectForCharacterRange(gfx::Range range, gfx::Rect* rect,
                                           gfx::Range* actual_range) const;

 private:
  // Returns composition character boundary rectangle. The |range| is
  // composition based range. Also stores |actual_range| which is corresponding
  // to actually used range for returned rectangle.
  gfx::Rect GetFirstRectForCompositionRange(const gfx::Range& range,
                                            gfx::Range* actual_range) const;

  // Converts from given whole character range to composition oriented range. If
  // the conversion failed, return gfx::Range::InvalidRange.
  gfx::Range ConvertCharacterRangeToCompositionRange(
      const gfx::Range& request_range) const;

  // Returns true if there is line break in |range| and stores line breaking
  // point to |line_breaking_point|. The |line_break_point| is valid only if
  // this function returns true.
  static bool GetLineBreakIndex(const std::vector<gfx::Rect>& bounds,
                                const gfx::Range& range,
                                size_t* line_break_point);

  void DestroyNSTextInputOSR();
#endif  // defined(OS_MACOSX)

 public:
  // RenderWidgetHostView methods.
  virtual gfx::Size GetPhysicalBackingSize() const OVERRIDE;
  virtual void InitAsChild(gfx::NativeView parent_view) OVERRIDE;
  virtual content::RenderWidgetHost* GetRenderWidgetHost() const OVERRIDE;
  virtual void SetSize(const gfx::Size& size) OVERRIDE;
  virtual void SetBounds(const gfx::Rect& rect) OVERRIDE;
  virtual gfx::NativeView GetNativeView() const OVERRIDE;
  virtual gfx::NativeViewId GetNativeViewId() const OVERRIDE;
  virtual gfx::NativeViewAccessible GetNativeViewAccessible() OVERRIDE;
  virtual bool HasFocus() const OVERRIDE;
  virtual bool IsSurfaceAvailableForCopy() const OVERRIDE;
  virtual void Show() OVERRIDE;
  virtual void Hide() OVERRIDE;
  virtual bool IsShowing() OVERRIDE;
  virtual gfx::Rect GetViewBounds() const OVERRIDE;
#if defined(OS_MACOSX)
  virtual void SetActive(bool active) OVERRIDE;
  virtual void SetTakesFocusOnlyOnMouseDown(bool flag) OVERRIDE;
  virtual void SetWindowVisibility(bool visible) OVERRIDE;
  virtual void WindowFrameChanged() OVERRIDE;
  virtual void ShowDefinitionForSelection() OVERRIDE;
  virtual bool SupportsSpeech() const OVERRIDE;
  virtual void SpeakSelection() OVERRIDE;
  virtual bool IsSpeaking() const OVERRIDE;
  virtual void StopSpeaking() OVERRIDE;
#endif  // defined(OS_MACOSX)
#if defined(TOOLKIT_GTK)
  virtual GdkEventButton* GetLastMouseDown() OVERRIDE;
  virtual gfx::NativeView BuildInputMethodsGtkMenu() OVERRIDE;
#endif  // defined(TOOLKIT_GTK)

  // RenderWidgetHostViewPort methods.
  virtual void InitAsPopup(RenderWidgetHostView* parent_host_view,
      const gfx::Rect& pos) OVERRIDE;
  virtual void InitAsFullscreen(
      RenderWidgetHostView* reference_host_view) OVERRIDE;
  virtual void WasShown() OVERRIDE;
  virtual void WasHidden() OVERRIDE;
  virtual void MovePluginWindows(
      const gfx::Vector2d& scroll_offset,
      const std::vector<content::WebPluginGeometry>& moves) OVERRIDE;
  virtual void Focus() OVERRIDE;
  virtual void Blur() OVERRIDE;
  virtual void UpdateCursor(const content::WebCursor& cursor) OVERRIDE;
  virtual void SetIsLoading(bool is_loading) OVERRIDE;
  virtual void TextInputTypeChanged(ui::TextInputType type,
                                    ui::TextInputMode mode,
                                    bool can_compose_inline) OVERRIDE;
  virtual void ImeCancelComposition() OVERRIDE;
#if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
  virtual void ImeCompositionRangeChanged(
      const gfx::Range& range,
      const std::vector<gfx::Rect>& character_bounds) OVERRIDE;
#endif
  virtual void DidUpdateBackingStore(
      const gfx::Rect& scroll_rect,
      const gfx::Vector2d& scroll_delta,
      const std::vector<gfx::Rect>& copy_rects,
      const std::vector<ui::LatencyInfo>& latency_info) OVERRIDE;
  virtual void RenderProcessGone(base::TerminationStatus status,
      int error_code) OVERRIDE;
#if defined(OS_WIN) && !defined(USE_AURA)
  virtual void WillWmDestroy() OVERRIDE;
#endif
#if defined(OS_WIN) && defined(USE_AURA)
  virtual void SetParentNativeViewAccessible(
      gfx::NativeViewAccessible accessible_parent) OVERRIDE;
  virtual gfx::NativeViewId GetParentForWindowlessPlugin() const OVERRIDE;
#endif
  virtual void GetScreenInfo(blink::WebScreenInfo* results) OVERRIDE;
  virtual gfx::Rect GetBoundsInRootWindow() OVERRIDE;
  virtual void CreateBrowserAccessibilityManagerIfNeeded() OVERRIDE;
  virtual void Destroy() OVERRIDE;
  virtual void SetTooltipText(const base::string16& tooltip_text) OVERRIDE;
  virtual void SelectionBoundsChanged(
      const ViewHostMsg_SelectionBounds_Params& params) OVERRIDE;
  virtual void ScrollOffsetChanged() OVERRIDE;
  virtual content::BackingStore*
      AllocBackingStore(const gfx::Size& size) OVERRIDE;
  virtual void CopyFromCompositingSurface(
      const gfx::Rect& src_subrect,
      const gfx::Size& dst_size,
      const base::Callback<void(bool, const SkBitmap&)>& callback,
      const SkBitmap::Config config) OVERRIDE;
  virtual void CopyFromCompositingSurfaceToVideoFrame(
      const gfx::Rect& src_subrect,
      const scoped_refptr<media::VideoFrame>& target,
      const base::Callback<void(bool)>& callback) OVERRIDE;
  virtual bool CanCopyToVideoFrame() const OVERRIDE;
  virtual void OnAcceleratedCompositingStateChange() OVERRIDE;
  virtual void AcceleratedSurfaceInitialized(
      int host_id, int route_id) OVERRIDE;
  virtual void SetHasHorizontalScrollbar(
      bool has_horizontal_scrollbar) OVERRIDE;
  virtual void SetScrollOffsetPinning(
      bool is_pinned_to_left, bool is_pinned_to_right) OVERRIDE;
  virtual gfx::GLSurfaceHandle GetCompositingSurface() OVERRIDE;
  virtual void AcceleratedSurfaceBuffersSwapped(
      const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
      int gpu_host_id) OVERRIDE;
  virtual void AcceleratedSurfacePostSubBuffer(
      const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
      int gpu_host_id) OVERRIDE;
  virtual void AcceleratedSurfaceSuspend() OVERRIDE;
  virtual void AcceleratedSurfaceRelease() OVERRIDE;
  virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) OVERRIDE;
  virtual bool LockMouse() OVERRIDE;
  virtual void UnlockMouse() OVERRIDE;

#if defined(OS_WIN) && !defined(USE_AURA)
  virtual void SetClickthroughRegion(SkRegion* region) OVERRIDE;
#endif

#if defined(OS_MACOSX)
  virtual bool PostProcessEventForPluginIme(
      const content::NativeWebKeyboardEvent& event) OVERRIDE;
#endif

  // RenderWidgetHostViewBase methods.
  virtual void SetBackground(const SkBitmap& background) OVERRIDE;

  void SendKeyEvent(const content::NativeWebKeyboardEvent& event);
  void SendMouseEvent(const blink::WebMouseEvent& event);
  void SendMouseWheelEvent(const blink::WebMouseWheelEvent& event);

  void Invalidate(const gfx::Rect& rect,
                  CefBrowserHost::PaintElementType type);
  void Paint(const std::vector<gfx::Rect>& copy_rects);
  bool InstallTransparency();

  void OnScreenInfoChanged();
  float GetDeviceScaleFactor() const;

  void CancelWidget();
  void NotifyShowWidget();
  void NotifyHideWidget();
  void NotifySizeWidget();

  content::RenderWidgetHostImpl* get_render_widget_host_impl() const
      { return render_widget_host_; }
  CefRefPtr<CefBrowserHostImpl> get_browser_impl() const;
  void set_browser_impl(CefRefPtr<CefBrowserHostImpl> browser);
  void set_popup_host_view(CefRenderWidgetHostViewOSR* popup_view);
  void set_parent_host_view(CefRenderWidgetHostViewOSR* parent_view);

  bool IsPopupWidget() const {
    return popup_type_ != blink::WebPopupTypeNone;
  }

 private:
  friend class CefWebContentsViewOSR;

  explicit CefRenderWidgetHostViewOSR(content::RenderWidgetHost* widget);
  virtual ~CefRenderWidgetHostViewOSR();

  // After calling this function, object gets deleted
  void ShutdownHost();

  // Factory used to safely scope delayed calls to ShutdownHost().
  base::WeakPtrFactory<CefRenderWidgetHostViewOSR> weak_factory_;

  // The associated Model.  While |this| is being Destroyed,
  // |render_widget_host_| is NULL and the Windows message loop is run one last
  // time. Message handlers must check for a NULL |render_widget_host_|.
  content::RenderWidgetHostImpl* render_widget_host_;
  CefRenderWidgetHostViewOSR* parent_host_view_;
  CefRenderWidgetHostViewOSR* popup_host_view_;

  CefRefPtr<CefBrowserHostImpl> browser_impl_;

  bool about_to_validate_and_paint_;
  std::vector<gfx::Rect> pending_update_rects_;

  gfx::Rect popup_position_;

#if defined(OS_MACOSX)
  NSTextInputContext* text_input_context_osr_mac_;
#endif  // defined(OS_MACOSX)

  DISALLOW_COPY_AND_ASSIGN(CefRenderWidgetHostViewOSR);
};

#endif  // CEF_LIBCEF_BROWSER_RENDER_WIDGET_HOST_VIEW_OSR_H_