| // Copyright (c) 2014 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_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_ |
| |
| #include <atlbase.h> |
| #include <atlwin.h> |
| #include <atlcrack.h> |
| #include <oleacc.h> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/win/scoped_comptr.h" |
| #include "content/common/content_export.h" |
| #include "ui/gfx/rect.h" |
| |
| namespace ui { |
| class WindowEventTarget; |
| } |
| |
| namespace content { |
| class BrowserAccessibilityManagerWin; |
| |
| // Reasons for the existence of this class outlined below:- |
| // 1. Some screen readers expect every tab / every unique web content container |
| // to be in its own HWND with class name Chrome_RenderWidgetHostHWND. |
| // With Aura there is one main HWND which comprises the whole browser window |
| // or the whole desktop. So, we need a fake HWND with the window class as |
| // Chrome_RenderWidgetHostHWND as the root of the accessibility tree for |
| // each tab. |
| // 2. There are legacy drivers for trackpads/trackpoints which have special |
| // code for sending mouse wheel and scroll events to the |
| // Chrome_RenderWidgetHostHWND window. |
| // 3. Windowless NPAPI plugins like Flash and Silverlight which expect the |
| // container window to have the same bounds as the web page. In Aura, the |
| // default container window is the whole window which includes the web page |
| // WebContents, etc. This causes the plugin mouse event calculations to |
| // fail. |
| // We should look to get rid of this code when all of the above are fixed. |
| |
| // This class implements a child HWND with the same size as the content area, |
| // that delegates its accessibility implementation to the root of the |
| // BrowserAccessibilityManager tree. This HWND is hooked up as the parent of |
| // the root object in the BrowserAccessibilityManager tree, so when any |
| // accessibility client calls ::WindowFromAccessibleObject, they get this |
| // HWND instead of the DesktopWindowTreeHostWin. |
| class CONTENT_EXPORT LegacyRenderWidgetHostHWND |
| : public ATL::CWindowImpl<LegacyRenderWidgetHostHWND, |
| NON_EXPORTED_BASE(ATL::CWindow), |
| ATL::CWinTraits<WS_CHILD> > { |
| public: |
| DECLARE_WND_CLASS_EX(L"Chrome_RenderWidgetHostHWND", CS_DBLCLKS, 0); |
| |
| typedef ATL::CWindowImpl<LegacyRenderWidgetHostHWND, |
| NON_EXPORTED_BASE(ATL::CWindow), |
| ATL::CWinTraits<WS_CHILD> > Base; |
| |
| ~LegacyRenderWidgetHostHWND(); |
| |
| // Creates and returns an instance of the LegacyRenderWidgetHostHWND class on |
| // successful creation of a child window parented to the parent window passed |
| // in. |
| static scoped_ptr<LegacyRenderWidgetHostHWND> Create(HWND parent); |
| |
| BEGIN_MSG_MAP_EX(LegacyRenderWidgetHostHWND) |
| MESSAGE_HANDLER_EX(WM_GETOBJECT, OnGetObject) |
| MESSAGE_RANGE_HANDLER(WM_KEYFIRST, WM_KEYLAST, OnKeyboardRange) |
| MESSAGE_HANDLER_EX(WM_PAINT, OnPaint) |
| MESSAGE_HANDLER_EX(WM_NCPAINT, OnNCPaint) |
| MESSAGE_HANDLER_EX(WM_ERASEBKGND, OnEraseBkGnd) |
| MESSAGE_RANGE_HANDLER(WM_MOUSEFIRST, WM_MOUSELAST, OnMouseRange) |
| MESSAGE_HANDLER_EX(WM_MOUSELEAVE, OnMouseLeave) |
| MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate) |
| MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor) |
| MESSAGE_HANDLER_EX(WM_TOUCH, OnTouch) |
| MESSAGE_HANDLER_EX(WM_HSCROLL, OnScroll) |
| MESSAGE_HANDLER_EX(WM_VSCROLL, OnScroll) |
| MESSAGE_HANDLER_EX(WM_NCHITTEST, OnNCHitTest) |
| MESSAGE_RANGE_HANDLER(WM_NCMOUSEMOVE, WM_NCXBUTTONDBLCLK, |
| OnMouseRange) |
| MESSAGE_HANDLER_EX(WM_NCCALCSIZE, OnNCCalcSize) |
| MESSAGE_HANDLER_EX(WM_SIZE, OnSize) |
| END_MSG_MAP() |
| |
| HWND hwnd() { return m_hWnd; } |
| |
| // Called when the child window is to be reparented to a new window. |
| // The |parent| parameter contains the new parent window. |
| void UpdateParent(HWND parent); |
| HWND GetParent(); |
| |
| IAccessible* window_accessible() { return window_accessible_; } |
| |
| void set_browser_accessibility_manager( |
| content::BrowserAccessibilityManagerWin* manager) { |
| manager_ = manager; |
| } |
| |
| void OnManagerDeleted(); |
| |
| // Functions to show and hide the window. |
| void Show(); |
| void Hide(); |
| |
| // Resizes the window to the bounds passed in. |
| void SetBounds(const gfx::Rect& bounds); |
| |
| protected: |
| virtual void OnFinalMessage(HWND hwnd) OVERRIDE; |
| |
| private: |
| LegacyRenderWidgetHostHWND(HWND parent); |
| |
| bool Init(); |
| |
| // Returns the target to which the windows input events are forwarded. |
| static ui::WindowEventTarget* GetWindowEventTarget(HWND parent); |
| |
| LRESULT OnEraseBkGnd(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnGetObject(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnKeyboardRange(UINT message, WPARAM w_param, LPARAM l_param, |
| BOOL& handled); |
| LRESULT OnMouseLeave(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param, |
| BOOL& handled); |
| LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnTouch(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnScroll(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnNCHitTest(UINT message, WPARAM w_param, LPARAM l_param); |
| |
| LRESULT OnNCPaint(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnPaint(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnNCCalcSize(UINT message, WPARAM w_param, LPARAM l_param); |
| LRESULT OnSize(UINT message, WPARAM w_param, LPARAM l_param); |
| |
| content::BrowserAccessibilityManagerWin* manager_; |
| base::win::ScopedComPtr<IAccessible> window_accessible_; |
| |
| // Set to true if we turned on mouse tracking. |
| bool mouse_tracking_enabled_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LegacyRenderWidgetHostHWND); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_ |
| |