content/browser/renderer_host/render_widget_host_view_base.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
   7
   8 #if defined(OS_MACOSX)
   9 #include <OpenGL/OpenGL.h>
  10 #endif
  11
  12 #if defined(TOOLKIT_GTK)
  13 #include <gdk/gdk.h>
  14 #endif
  15
  16 #include <string>
  17 #include <vector>
  18
  19 #include "base/memory/scoped_ptr.h"
  20 #include "base/callback_forward.h"
  21 #include "content/common/content_export.h"
  22 #include "content/port/browser/render_widget_host_view_port.h"
  23 #include "ui/base/range/range.h"
  24 #include "ui/gfx/native_widget_types.h"
  25 #include "ui/gfx/rect.h"
  26
  27 namespace content {
  28
  29 class RenderWidgetHostImpl;
  30
  31 // Basic implementation shared by concrete RenderWidgetHostView
  32 // subclasses.
  33 //
  34 // Note that nothing should use this class, except concrete subclasses
  35 // that are deriving from it, and code that is written specifically to
  36 // use one of these concrete subclasses (i.e. platform-specific code).
  37 //
  38 // To enable embedders that add ports, everything else in content/
  39 // should use the RenderWidgetHostViewPort interface.
  40 //
  41 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
  42 class CONTENT_EXPORT RenderWidgetHostViewBase
  43     : public RenderWidgetHostViewPort {
  44  public:
  45   virtual ~RenderWidgetHostViewBase();
  46
  47   // RenderWidgetHostViewPort implementation.
  48   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
  49   virtual void SelectionChanged(const string16& text,
  50                                 size_t offset,
  51                                 const ui::Range& range) OVERRIDE;
  52   virtual void SetBackground(const SkBitmap& background) OVERRIDE;
  53   virtual const SkBitmap& GetBackground() OVERRIDE;
  54   virtual gfx::Size GetPhysicalBackingSize() const OVERRIDE;
  55   virtual float GetOverdrawBottomHeight() const OVERRIDE;
  56   virtual bool IsShowingContextMenu() const OVERRIDE;
  57   virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
  58   virtual string16 GetSelectedText() const OVERRIDE;
  59   virtual bool IsMouseLocked() OVERRIDE;
  60   virtual void UnhandledWheelEvent(
  61       const WebKit::WebMouseWheelEvent& event) OVERRIDE;
  62   virtual InputEventAckState FilterInputEvent(
  63       const WebKit::WebInputEvent& input_event) OVERRIDE;
  64   virtual void GestureEventAck(int gesture_event_type) OVERRIDE;
  65   virtual void SetPopupType(WebKit::WebPopupType popup_type) OVERRIDE;
  66   virtual WebKit::WebPopupType GetPopupType() OVERRIDE;
  67   virtual BrowserAccessibilityManager*
  68       GetBrowserAccessibilityManager() const OVERRIDE;
  69   virtual void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
  70                                       InputEventAckState ack_result) OVERRIDE;
  71   virtual SmoothScrollGesture* CreateSmoothScrollGesture(
  72       bool scroll_down, int pixels_to_scroll, int mouse_event_x,
  73       int mouse_event_y) OVERRIDE;
  74   virtual bool CanSubscribeFrame() const OVERRIDE;
  75   virtual void BeginFrameSubscription(
  76       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) OVERRIDE;
  77   virtual void EndFrameSubscription() OVERRIDE;
  78   virtual void OnSwapCompositorFrame(
  79       scoped_ptr<cc::CompositorFrame> frame) OVERRIDE {}
  80   virtual void OnOverscrolled(gfx::Vector2dF accumulated_overscroll,
  81                               gfx::Vector2dF current_fling_velocity) OVERRIDE;
  82
  83   void SetBrowserAccessibilityManager(BrowserAccessibilityManager* manager);
  84
  85   // Notification that a resize or move session ended on the native widget.
  86   void UpdateScreenInfo(gfx::NativeView view);
  87
  88 #if defined(OS_WIN)
  89   // The callback that DetachPluginsHelper calls for each child window. Call
  90   // this directly if you want to do custom filtering on plugin windows first.
  91   static void DetachPluginWindowsCallback(HWND window);
  92 #endif
  93
  94  protected:
  95   // Interface class only, do not construct.
  96   RenderWidgetHostViewBase();
  97
  98 #if defined(OS_WIN)
  99   // Shared implementation of MovePluginWindows for use by win and aura/wina.
 100   static void MovePluginWindowsHelper(
 101       HWND parent,
 102       const std::vector<webkit::npapi::WebPluginGeometry>& moves);
 103
 104   static void PaintPluginWindowsHelper(
 105       HWND parent,
 106       const gfx::Rect& damaged_screen_rect);
 107
 108   // Needs to be called before the HWND backing the view goes away to avoid
 109   // crashes in Windowed plugins.
 110   static void DetachPluginsHelper(HWND parent);
 111 #endif
 112
 113   // Whether this view is a popup and what kind of popup it is (select,
 114   // autofill...).
 115   WebKit::WebPopupType popup_type_;
 116
 117   // A custom background to paint behind the web content. This will be tiled
 118   // horizontally. Can be null, in which case we fall back to painting white.
 119   SkBitmap background_;
 120
 121   // While the mouse is locked, the cursor is hidden from the user. Mouse events
 122   // are still generated. However, the position they report is the last known
 123   // mouse position just as mouse lock was entered; the movement they report
 124   // indicates what the change in position of the mouse would be had it not been
 125   // locked.
 126   bool mouse_locked_;
 127
 128   // Whether we are showing a context menu.
 129   bool showing_context_menu_;
 130
 131   // A buffer containing the text inside and around the current selection range.
 132   string16 selection_text_;
 133
 134   // The offset of the text stored in |selection_text_| relative to the start of
 135   // the web page.
 136   size_t selection_text_offset_;
 137
 138   // The current selection range relative to the start of the web page.
 139   ui::Range selection_range_;
 140
 141 protected:
 142   // The scale factor of the display the renderer is currently on.
 143   float current_device_scale_factor_;
 144
 145  private:
 146   // Manager of the tree representation of the WebKit render tree.
 147   scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
 148
 149   gfx::Rect current_display_area_;
 150
 151   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 152 };
 153
 154 }  // namespace content
 155
 156 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_