Move more message handlers from NativeWidgetWin to HWNDMessageHandler.

http://crbug.com/142962
R=sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10832345

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152013 0039d316-1c4b-4281-b951-d872f2087c98

ui/views/widget/hwnd_message_handler.cc

@@ -4,6 +4,12 @@
 
 #include "ui/views/widget/hwnd_message_handler.h"
 
+#include <dwmapi.h>
+
+#include "base/system_monitor/system_monitor.h"
+#include "ui/base/native_theme/native_theme_win.h"
+#include "ui/gfx/path.h"
+#include "ui/views/ime/input_method_win.h"
 #include "ui/views/widget/hwnd_message_handler_delegate.h"
 #include "ui/views/widget/native_widget_win.h"
 
@@ -113,9 +119,263 @@ void HWNDMessageHandler::OnExitSizeMove() {
   SetMsgHandled(FALSE);
 }
 
+LRESULT HWNDMessageHandler::OnImeMessages(UINT message,
+                                          WPARAM w_param,
+                                          LPARAM l_param) {
+  InputMethod* input_method = delegate_->GetInputMethod();
+  if (!input_method || input_method->IsMock()) {
+    SetMsgHandled(FALSE);
+    return 0;
+  }
+
+  InputMethodWin* ime_win = static_cast<InputMethodWin*>(input_method);
+  BOOL handled = FALSE;
+  LRESULT result = ime_win->OnImeMessages(message, w_param, l_param, &handled);
+  SetMsgHandled(handled);
+  return result;
+}
+
+void HWNDMessageHandler::OnInitMenu(HMENU menu) {
+  bool is_fullscreen = delegate_->AsNativeWidgetWin()->IsFullscreen();
+  bool is_minimized = delegate_->AsNativeWidgetWin()->IsMinimized();
+  bool is_maximized = delegate_->AsNativeWidgetWin()->IsMaximized();
+  bool is_restored = !is_fullscreen && !is_minimized && !is_maximized;
+
+  EnableMenuItem(menu, SC_RESTORE, is_minimized || is_maximized);
+  EnableMenuItem(menu, SC_MOVE, is_restored);
+  EnableMenuItem(menu, SC_SIZE, delegate_->CanResize() && is_restored);
+  EnableMenuItem(menu, SC_MAXIMIZE, delegate_->CanMaximize() &&
+                 !is_fullscreen && !is_maximized);
+  EnableMenuItem(menu, SC_MINIMIZE, delegate_->CanMaximize() && !is_minimized);
+}
+
+void HWNDMessageHandler::OnInitMenuPopup() {
+  SetMsgHandled(FALSE);
+}
+
+void HWNDMessageHandler::OnInputLangChange(DWORD character_set,
+                                           HKL input_language_id) {
+  InputMethod* input_method = delegate_->GetInputMethod();
+  if (input_method && !input_method->IsMock()) {
+    static_cast<InputMethodWin*>(input_method)->OnInputLangChange(
+        character_set, input_language_id);
+  }
+}
+
+LRESULT HWNDMessageHandler::OnKeyEvent(UINT message,
+                                       WPARAM w_param,
+                                       LPARAM l_param) {
+  MSG msg = { hwnd(), message, w_param, l_param };
+  ui::KeyEvent key(msg, message == WM_CHAR);
+  InputMethod* input_method = delegate_->GetInputMethod();
+  if (input_method)
+    input_method->DispatchKeyEvent(key);
+  else
+    delegate_->AsNativeWidgetWin()->DispatchKeyEventPostIME(key);
+  return 0;
+}
+
+void HWNDMessageHandler::OnKillFocus(HWND focused_window) {
+  delegate_->HandleNativeBlur(focused_window);
+
+  InputMethod* input_method = delegate_->GetInputMethod();
+  if (input_method)
+    input_method->OnBlur();
+  SetMsgHandled(FALSE);
+}
+
+LRESULT HWNDMessageHandler::OnMouseActivate(UINT message,
+                                            WPARAM w_param,
+                                            LPARAM l_param) {
+  // TODO(beng): resolve this with the GetWindowLong() check on the subsequent
+  //             line.
+  if (delegate_->IsWidgetWindow())
+    return delegate_->CanActivate() ? MA_ACTIVATE : MA_NOACTIVATEANDEAT;
+  if (delegate_->AsNativeWidgetWin()->GetWindowLong(GWL_EXSTYLE) &
+          WS_EX_NOACTIVATE) {
+    return MA_NOACTIVATE;
+  }
+  SetMsgHandled(FALSE);
+  return MA_ACTIVATE;
+}
+
+void HWNDMessageHandler::OnMove(const CPoint& point) {
+  delegate_->HandleMove();
+  SetMsgHandled(FALSE);
+}
+
+void HWNDMessageHandler::OnMoving(UINT param, const RECT* new_bounds) {
+  delegate_->HandleMove();
+}
+
+LRESULT HWNDMessageHandler::OnNCHitTest(const CPoint& point) {
+  if (!delegate_->IsWidgetWindow()) {
+    SetMsgHandled(FALSE);
+    return 0;
+  }
+
+  // If the DWM is rendering the window controls, we need to give the DWM's
+  // default window procedure first chance to handle hit testing.
+  if (!remove_standard_frame_ && !delegate_->IsUsingCustomFrame()) {
+    LRESULT result;
+    if (DwmDefWindowProc(hwnd(), WM_NCHITTEST, 0,
+                         MAKELPARAM(point.x, point.y), &result)) {
+      return result;
+    }
+  }
+
+  // First, give the NonClientView a chance to test the point to see if it
+  // provides any of the non-client area.
+  POINT temp = point;
+  MapWindowPoints(HWND_DESKTOP, hwnd(), &temp, 1);
+  int component = delegate_->GetNonClientComponent(gfx::Point(temp));
+  if (component != HTNOWHERE)
+    return component;
+
+  // Otherwise, we let Windows do all the native frame non-client handling for
+  // us.
+  SetMsgHandled(FALSE);
+  return 0;
+}
+
+LRESULT HWNDMessageHandler::OnNCUAHDrawCaption(UINT message,
+                                               WPARAM w_param,
+                                               LPARAM l_param) {
+  // See comment in widget_win.h at the definition of WM_NCUAHDRAWCAPTION for
+  // an explanation about why we need to handle this message.
+  SetMsgHandled(delegate_->IsUsingCustomFrame());
+  return 0;
+}
+
+LRESULT HWNDMessageHandler::OnNCUAHDrawFrame(UINT message,
+                                             WPARAM w_param,
+                                             LPARAM l_param) {
+  // See comment in widget_win.h at the definition of WM_NCUAHDRAWCAPTION for
+  // an explanation about why we need to handle this message.
+  SetMsgHandled(delegate_->IsUsingCustomFrame());
+  return 0;
+}
+
+LRESULT HWNDMessageHandler::OnPowerBroadcast(DWORD power_event, DWORD data) {
+  base::SystemMonitor* monitor = base::SystemMonitor::Get();
+  if (monitor)
+    monitor->ProcessWmPowerBroadcastMessage(power_event);
+  SetMsgHandled(FALSE);
+  return 0;
+}
+
+LRESULT HWNDMessageHandler::OnReflectedMessage(UINT message,
+                                               WPARAM w_param,
+                                               LPARAM l_param) {
+  SetMsgHandled(FALSE);
+  return 0;
+}
+
+LRESULT HWNDMessageHandler::OnSetCursor(UINT message,
+                                        WPARAM w_param,
+                                        LPARAM l_param) {
+  // Using ScopedRedrawLock here frequently allows content behind this window to
+  // paint in front of this window, causing glaring rendering artifacts.
+  // If omitting ScopedRedrawLock here triggers caption rendering artifacts via
+  // DefWindowProc message handling, we'll need to find a better solution.
+  SetMsgHandled(FALSE);
+  return 0;
+}
+
+void HWNDMessageHandler::OnSetFocus(HWND last_focused_window) {
+  delegate_->HandleNativeFocus(last_focused_window);
+  InputMethod* input_method = delegate_->GetInputMethod();
+  if (input_method)
+    input_method->OnFocus();
+  SetMsgHandled(FALSE);
+}
+
+LRESULT HWNDMessageHandler::OnSetIcon(UINT size_type, HICON new_icon) {
+  // Use a ScopedRedrawLock to avoid weird non-client painting.
+  return DefWindowProcWithRedrawLock(WM_SETICON, size_type,
+                                     reinterpret_cast<LPARAM>(new_icon));
+}
+
+LRESULT HWNDMessageHandler::OnSetText(const wchar_t* text) {
+  // Use a ScopedRedrawLock to avoid weird non-client painting.
+  return DefWindowProcWithRedrawLock(WM_SETTEXT, NULL,
+                                     reinterpret_cast<LPARAM>(text));
+}
+
+void HWNDMessageHandler::OnSize(UINT param, const CSize& size) {
+  RedrawWindow(hwnd(), NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
+  // ResetWindowRegion is going to trigger WM_NCPAINT. By doing it after we've
+  // invoked OnSize we ensure the RootView has been laid out.
+  ResetWindowRegion(false);
+}
+
+void HWNDMessageHandler::OnThemeChanged() {
+  ui::NativeThemeWin::instance()->CloseHandles();
+}
+
+void HWNDMessageHandler::OnVScroll(int scroll_type,
+                                   short position,
+                                   HWND scrollbar) {
+  SetMsgHandled(FALSE);
+}
+
+void HWNDMessageHandler::ResetWindowRegion(bool force) {
+  // A native frame uses the native window region, and we don't want to mess
+  // with it.
+  if (!delegate_->IsUsingCustomFrame() || !delegate_->IsWidgetWindow()) {
+    if (force)
+      SetWindowRgn(hwnd(), NULL, TRUE);
+    return;
+  }
+
+  // Changing the window region is going to force a paint. Only change the
+  // window region if the region really differs.
+  HRGN current_rgn = CreateRectRgn(0, 0, 0, 0);
+  int current_rgn_result = GetWindowRgn(hwnd(), current_rgn);
+
+  CRect window_rect;
+  GetWindowRect(hwnd(), &window_rect);
+  HRGN new_region;
+  if (delegate_->AsNativeWidgetWin()->IsMaximized()) {
+    HMONITOR monitor = MonitorFromWindow(hwnd(), MONITOR_DEFAULTTONEAREST);
+    MONITORINFO mi;
+    mi.cbSize = sizeof mi;
+    GetMonitorInfo(monitor, &mi);
+    CRect work_rect = mi.rcWork;
+    work_rect.OffsetRect(-window_rect.left, -window_rect.top);
+    new_region = CreateRectRgnIndirect(&work_rect);
+  } else {
+    gfx::Path window_mask;
+    delegate_->GetWindowMask(
+        gfx::Size(window_rect.Width(), window_rect.Height()), &window_mask);
+    new_region = window_mask.CreateNativeRegion();
+  }
+
+  if (current_rgn_result == ERROR || !EqualRgn(current_rgn, new_region)) {
+    // SetWindowRgn takes ownership of the HRGN created by CreateNativeRegion.
+    SetWindowRgn(hwnd(), new_region, TRUE);
+  } else {
+    DeleteObject(new_region);
+  }
+
+  DeleteObject(current_rgn);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // HWNDMessageHandler, private:
 
+HWND HWNDMessageHandler::hwnd() {
+  return delegate_->AsNativeWidgetWin()->hwnd();
+}
+
+LRESULT HWNDMessageHandler::DefWindowProcWithRedrawLock(UINT message,
+                                                        WPARAM w_param,
+                                                        LPARAM l_param) {
+  return delegate_->AsNativeWidgetWin()->DefWindowProcWithRedrawLock(message,
+                                                                     w_param,
+                                                                     l_param);
+}
+
 void HWNDMessageHandler::SetMsgHandled(BOOL handled) {
   delegate_->AsNativeWidgetWin()->SetMsgHandled(handled);
 }

ui/views/widget/hwnd_message_handler.h

@@ -48,6 +48,27 @@ class VIEWS_EXPORT HWNDMessageHandler {
   LRESULT OnEraseBkgnd(HDC dc);
   void OnExitMenuLoop(BOOL is_track_popup_menu);
   void OnExitSizeMove();
+  LRESULT OnImeMessages(UINT message, WPARAM w_param, LPARAM l_param);
+  void OnInitMenu(HMENU menu);
+  void OnInitMenuPopup();
+  void OnInputLangChange(DWORD character_set, HKL input_language_id);
+  LRESULT OnKeyEvent(UINT message, WPARAM w_param, LPARAM l_param);
+  void OnKillFocus(HWND focused_window);
+  LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
+  void OnMove(const CPoint& point);
+  void OnMoving(UINT param, const RECT* new_bounds);
+  LRESULT OnNCHitTest(const CPoint& point);
+  LRESULT OnNCUAHDrawCaption(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnNCUAHDrawFrame(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnPowerBroadcast(DWORD power_event, DWORD data);
+  LRESULT OnReflectedMessage(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
+  void OnSetFocus(HWND last_focused_window);
+  LRESULT OnSetIcon(UINT size_type, HICON new_icon);
+  LRESULT OnSetText(const wchar_t* text);
+  void OnSize(UINT param, const CSize& size);
+  void OnThemeChanged();
+  void OnVScroll(int scroll_type, short position, HWND scrollbar);
 
   // TODO(beng): Can be removed once this object becomes the WindowImpl.
   bool remove_standard_frame() const { return remove_standard_frame_; }
@@ -55,7 +76,21 @@ class VIEWS_EXPORT HWNDMessageHandler {
     remove_standard_frame_ = remove_standard_frame;
   }
 
+  // Resets the window region for the current widget bounds if necessary.
+  // If |force| is true, the window region is reset to NULL even for native
+  // frame windows.
+  void ResetWindowRegion(bool force);
+
  private:
+  // TODO(beng): This won't be a style violation once this object becomes the
+  //             WindowImpl.
+  HWND hwnd();
+
+  // TODO(beng): Remove once this class becomes the WindowImpl.
+  LRESULT DefWindowProcWithRedrawLock(UINT message,
+                                      WPARAM w_param,
+                                      LPARAM l_param);
+
   // TODO(beng): Remove once this class becomes the WindowImpl.
   void SetMsgHandled(BOOL handled);
 

ui/views/widget/hwnd_message_handler_delegate.h

@@ -7,8 +7,15 @@
 
 #include "ui/views/views_export.h"
 
+namespace gfx {
+class Path;
+class Point;
+class Size;
+}
+
 namespace views {
 
+class InputMethod;
 class NativeWidgetWin;
 
 // Implemented by the object that uses the HWNDMessageHandler to handle
@@ -21,6 +28,15 @@ class VIEWS_EXPORT HWNDMessageHandlerDelegate {
   //             to avoid confusion.
   virtual bool IsUsingCustomFrame() const = 0;
 
+  virtual bool CanResize() const = 0;
+  virtual bool CanMaximize() const = 0;
+  virtual bool CanActivate() const = 0;
+
+  virtual int GetNonClientComponent(const gfx::Point& point) const = 0;
+  virtual void GetWindowMask(const gfx::Size& size, gfx::Path* mask) = 0;
+
+  virtual InputMethod* GetInputMethod() = 0;
+
   // TODO(beng): Investigate migrating these methods to On* prefixes once
   // HWNDMessageHandler is the WindowImpl.
 
@@ -55,6 +71,15 @@ class VIEWS_EXPORT HWNDMessageHandlerDelegate {
   virtual void HandleBeginWMSizeMove() = 0;
   virtual void HandleEndWMSizeMove() = 0;
 
+  // Called when the window's position changed.
+  virtual void HandleMove() = 0;
+
+  // Called when focus shifted to this HWND from |last_focused_window|.
+  virtual void HandleNativeFocus(HWND last_focused_window) = 0;
+
+  // Called when focus shifted from the HWND to a different window.
+  virtual void HandleNativeBlur(HWND focused_window) = 0;
+
   // This is provided for methods that need to call private methods on NWW.
   // TODO(beng): should be removed once HWNDMessageHandler is the WindowImpl.
   virtual NativeWidgetWin* AsNativeWidgetWin() = 0;

ui/views/widget/native_widget_win.h

@@ -493,6 +493,12 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
   // Overridden from HWNDMessageHandlerDelegate:
   virtual bool IsWidgetWindow() const OVERRIDE;
   virtual bool IsUsingCustomFrame() const OVERRIDE;
+  virtual bool CanResize() const OVERRIDE;
+  virtual bool CanMaximize() const OVERRIDE;
+  virtual bool CanActivate() const OVERRIDE;
+  virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
+  virtual void GetWindowMask(const gfx::Size& size, gfx::Path* path) OVERRIDE;
+  virtual InputMethod* GetInputMethod() OVERRIDE;
   virtual void HandleAppDeactivated() OVERRIDE;
   virtual bool HandleAppCommand(short command) OVERRIDE;
   virtual void HandleCaptureLost() OVERRIDE;
@@ -503,6 +509,9 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
   virtual void HandleGlassModeChange() OVERRIDE;
   virtual void HandleBeginWMSizeMove() OVERRIDE;
   virtual void HandleEndWMSizeMove() OVERRIDE;
+  virtual void HandleMove() OVERRIDE;
+  virtual void HandleNativeFocus(HWND last_focused_window) OVERRIDE;
+  virtual void HandleNativeBlur(HWND focused_window) OVERRIDE;
   virtual NativeWidgetWin* AsNativeWidgetWin() OVERRIDE;
 
   // Called after the WM_ACTIVATE message has been processed by the default
@@ -532,11 +541,6 @@ class VIEWS_EXPORT NativeWidgetWin : public ui::WindowImpl,
   // or subsequently.
   void ClientAreaSizeChanged();
 
-  // Resets the window region for the current widget bounds if necessary.
-  // If |force| is true, the window region is reset to NULL even for native
-  // frame windows.
-  void ResetWindowRegion(bool force);
-
   // When removing the standard frame, tells the DWM how much glass we want on
   // the edges. Currently hardcoded to 10px on all sides.
   void UpdateDWMFrame();