Consolidate/cleanup event cracking code; single out GdkEvents.

views/events/event_win.cc

 // 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.
 
 #include "views/events/event.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "ui/base/keycodes/keyboard_code_conversion_win.h"
+#include "ui/base/win/event_util.h"
 
 namespace views {
 
-namespace {
-
-// Returns a mask corresponding to the set of modifier keys that are currently
-// pressed. Windows key messages don't come with control key state as parameters
-// as with mouse messages, so we need to explicitly ask for these states.
-int GetKeyStateFlags() {
-  int flags = 0;
-  flags |= (GetKeyState(VK_MENU) & 0x80)? ui::EF_ALT_DOWN : 0;
-  flags |= (GetKeyState(VK_SHIFT) & 0x80)? ui::EF_SHIFT_DOWN : 0;
-  flags |= (GetKeyState(VK_CONTROL) & 0x80)? ui::EF_CONTROL_DOWN : 0;
-  return flags;
-}
-
-bool IsButtonDown(NativeEvent native_event) {
-  return (native_event.wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON |
-                                 MK_XBUTTON1 | MK_XBUTTON2)) != 0;
-}
-
-// Convert windows message identifiers to Event types.
-ui::EventType EventTypeFromNative(NativeEvent native_event) {
-  switch (native_event.message) {
-    case WM_KEYDOWN:
-    case WM_SYSKEYDOWN:
-    case WM_CHAR:
-      return ui::ET_KEY_PRESSED;
-    case WM_KEYUP:
-    case WM_SYSKEYUP:
-      return ui::ET_KEY_RELEASED;
-    case WM_LBUTTONDBLCLK:
-    case WM_LBUTTONDOWN:
-    case WM_MBUTTONDBLCLK:
-    case WM_MBUTTONDOWN:
-    case WM_NCLBUTTONDBLCLK:
-    case WM_NCLBUTTONDOWN:
-    case WM_NCMBUTTONDBLCLK:
-    case WM_NCMBUTTONDOWN:
-    case WM_NCRBUTTONDBLCLK:
-    case WM_NCRBUTTONDOWN:
-    case WM_NCXBUTTONDBLCLK:
-    case WM_NCXBUTTONDOWN:
-    case WM_RBUTTONDBLCLK:
-    case WM_RBUTTONDOWN:
-    case WM_XBUTTONDBLCLK:
-    case WM_XBUTTONDOWN:
-      return ui::ET_MOUSE_PRESSED;
-    case WM_LBUTTONUP:
-    case WM_MBUTTONUP:
-    case WM_NCLBUTTONUP:
-    case WM_NCMBUTTONUP:
-    case WM_NCRBUTTONUP:
-    case WM_NCXBUTTONUP:
-    case WM_RBUTTONUP:
-    case WM_XBUTTONUP:
-      return ui::ET_MOUSE_RELEASED;
-    case WM_MOUSEMOVE:
-      return IsButtonDown(native_event) ? ui::ET_MOUSE_DRAGGED :
-                                          ui::ET_MOUSE_MOVED;
-    case WM_NCMOUSEMOVE:
-      return ui::ET_MOUSE_MOVED;
-    case WM_MOUSEWHEEL:
-      return ui::ET_MOUSEWHEEL;
-    case WM_MOUSELEAVE:
-    case WM_NCMOUSELEAVE:
-      return ui::ET_MOUSE_EXITED;
-    default:
-      NOTREACHED();
-  }
-  return ui::ET_UNKNOWN;
-}
-
-// Get views::Event flags from a native Windows message
-int EventFlagsFromNative(NativeEvent native_event) {
-  int flags = 0;
-
-  // TODO(msw): ORing the pressed/released button into the flags is _wrong_.
-  // It makes it impossible to tell which button was modified when multiple
-  // buttons are/were held down. We need to instead put the modified button into
-  // a separate member on the MouseEvent, then audit all consumers of
-  // MouseEvents to fix them to use the resulting values correctly.
-  switch (native_event.message) {
-    case WM_LBUTTONDBLCLK:
-    case WM_LBUTTONDOWN:
-    case WM_LBUTTONUP:
-    case WM_NCLBUTTONDBLCLK:
-    case WM_NCLBUTTONDOWN:
-    case WM_NCLBUTTONUP:
-      native_event.wParam |= MK_LBUTTON;
-      break;
-    case WM_MBUTTONDBLCLK:
-    case WM_MBUTTONDOWN:
-    case WM_MBUTTONUP:
-    case WM_NCMBUTTONDBLCLK:
-    case WM_NCMBUTTONDOWN:
-    case WM_NCMBUTTONUP:
-      native_event.wParam |= MK_MBUTTON;
-      break;
-    case WM_RBUTTONDBLCLK:
-    case WM_RBUTTONDOWN:
-    case WM_RBUTTONUP:
-    case WM_NCRBUTTONDBLCLK:
-    case WM_NCRBUTTONDOWN:
-    case WM_NCRBUTTONUP:
-      native_event.wParam |= MK_RBUTTON;
-      break;
-    case WM_NCXBUTTONDBLCLK:
-    case WM_NCXBUTTONDOWN:
-    case WM_NCXBUTTONUP:
-    case WM_XBUTTONDBLCLK:
-    case WM_XBUTTONDOWN:
-    case WM_XBUTTONUP:
-      native_event.wParam |= MK_XBUTTON1;
-      break;
-  }
-
-  // Check if the event occurred in the non-client area.
-  if (IsNonClientMouseEvent(native_event))
-    flags |= ui::EF_IS_NON_CLIENT;
-
-  // Check for double click events.
-  switch (native_event.message) {
-    case WM_NCLBUTTONDBLCLK:
-    case WM_NCMBUTTONDBLCLK:
-    case WM_NCRBUTTONDBLCLK:
-    case WM_NCXBUTTONDBLCLK:
-    case WM_LBUTTONDBLCLK:
-    case WM_MBUTTONDBLCLK:
-    case WM_RBUTTONDBLCLK:
-    case WM_XBUTTONDBLCLK:
-      flags |= ui::EF_IS_DOUBLE_CLICK;
-      break;
-  }
-
-  // For non-client mouse message, the WPARAM value represents the hit test
-  // result, instead of the key state.
-  switch (native_event.message) {
-    case WM_NCLBUTTONDOWN:
-    case WM_NCLBUTTONUP:
-      flags |= ui::EF_LEFT_BUTTON_DOWN;
-      break;
-    case WM_NCMBUTTONDOWN:
-    case WM_NCMBUTTONUP:
-      flags |= ui::EF_MIDDLE_BUTTON_DOWN;
-      break;
-    case WM_NCRBUTTONDOWN:
-    case WM_NCRBUTTONUP:
-      flags |= ui::EF_RIGHT_BUTTON_DOWN;
-      break;
-    default: {
-      UINT win_flags = GET_KEYSTATE_WPARAM(native_event.wParam);
-      flags |= (win_flags & MK_CONTROL) ? ui::EF_CONTROL_DOWN : 0;
-      flags |= (win_flags & MK_SHIFT) ? ui::EF_SHIFT_DOWN : 0;
-      flags |= (GetKeyState(VK_MENU) < 0) ? ui::EF_ALT_DOWN : 0;
-      flags |= (win_flags & MK_LBUTTON) ? ui::EF_LEFT_BUTTON_DOWN : 0;
-      flags |= (win_flags & MK_MBUTTON) ? ui::EF_MIDDLE_BUTTON_DOWN : 0;
-      flags |= (win_flags & MK_RBUTTON) ? ui::EF_RIGHT_BUTTON_DOWN : 0;
-      break;
-    }
-  }
-
-  return flags;
-}
-
-}  // namespace
-
-bool IsClientMouseEvent(const views::NativeEvent& native_event) {
-  return native_event.message == WM_MOUSELEAVE ||
-    native_event.message == WM_MOUSEHOVER ||
-    (native_event.message >= WM_MOUSEFIRST &&
-    native_event.message <= WM_MOUSELAST);
-}
-
-bool IsNonClientMouseEvent(const views::NativeEvent& native_event) {
-  return native_event.message == WM_NCMOUSELEAVE ||
-    native_event.message == WM_NCMOUSEHOVER ||
-    (native_event.message >= WM_NCMOUSEMOVE &&
-    native_event.message <= WM_NCXBUTTONDBLCLK);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Event, public:
-
-int Event::GetWindowsFlags() const {
-  // TODO: need support for x1/x2.
-  int result = 0;
-  result |= (flags_ & ui::EF_SHIFT_DOWN) ? MK_SHIFT : 0;
-  result |= (flags_ & ui::EF_CONTROL_DOWN) ? MK_CONTROL : 0;
-  result |= (flags_ & ui::EF_LEFT_BUTTON_DOWN) ? MK_LBUTTON : 0;
-  result |= (flags_ & ui::EF_MIDDLE_BUTTON_DOWN) ? MK_MBUTTON : 0;
-  result |= (flags_ & ui::EF_RIGHT_BUTTON_DOWN) ? MK_RBUTTON : 0;
-  return result;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Event, private:
 
 void Event::Init() {
   ZeroMemory(&native_event_, sizeof(native_event_));
   native_event_2_ = NULL;
 }
 
 void Event::InitWithNativeEvent(NativeEvent native_event) {
   native_event_ = native_event;
   // TODO(beng): remove once we rid views of Gtk/Gdk.
   native_event_2_ = NULL;
 }
 
 void Event::InitWithNativeEvent2(NativeEvent2 native_event_2,
                                  FromNativeEvent2) {
   // No one should ever call this on Windows.
   // TODO(beng): remove once we rid views of Gtk/Gdk.
   NOTREACHED();
   native_event_2_ = NULL;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // LocatedEvent, protected:
 
 LocatedEvent::LocatedEvent(NativeEvent native_event)
-    : Event(native_event, EventTypeFromNative(native_event),
-            EventFlagsFromNative(native_event)),
-      location_(native_event.pt.x, native_event.pt.y) {
+    : Event(native_event, ui::EventTypeFromNative(native_event),
+            ui::EventFlagsFromNative(native_event)),
+      location_(ui::EventLocationFromNative(native_event)) {
 }
 
 LocatedEvent::LocatedEvent(NativeEvent2 native_event_2,
                            FromNativeEvent2 from_native)
     : Event(native_event_2, ui::ET_UNKNOWN, 0, from_native) {
   // No one should ever call this on Windows.
   // TODO(msw): remove once we rid views of Gtk/Gdk.
   NOTREACHED();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // KeyEvent, public:
 
 KeyEvent::KeyEvent(NativeEvent native_event)
     : Event(native_event,
-            EventTypeFromNative(native_event),
-            GetKeyStateFlags()),
+            ui::EventTypeFromNative(native_event),
+            ui::EventFlagsFromNative(native_event)),
       key_code_(ui::KeyboardCodeForWindowsKeyCode(native_event.wParam)),
       character_(0),
       unmodified_character_(0) {
 }
 
 KeyEvent::KeyEvent(NativeEvent2 native_event_2, FromNativeEvent2 from_native)
     : Event(native_event_2, ui::ET_UNKNOWN, 0, from_native) {
   // No one should ever call this on Windows.
   // TODO(beng): remove once we rid views of Gtk/Gdk.
   NOTREACHED();
@@ skipping 12 matching lines @@
   // Looks like there is no way to get unmodified character on Windows.
   return (native_event().message == WM_CHAR) ? key_code_ :
       GetCharacterFromKeyCode(key_code_, flags() & ui::EF_SHIFT_DOWN);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // MouseEvent, public:
 
 MouseEvent::MouseEvent(NativeEvent native_event)
     : LocatedEvent(native_event) {
-  if (IsNonClientMouseEvent(native_event)) {
-    // Non-client message. The position is contained in a POINTS structure in
-    // LPARAM, and is in screen coordinates so we have to convert to client.
-    POINT native_point = location_.ToPOINT();
-    ScreenToClient(native_event.hwnd, &native_point);
-    location_ = gfx::Point(native_point);
-  }
 }
 
 MouseEvent::MouseEvent(NativeEvent2 native_event_2,
                        FromNativeEvent2 from_native)
     : LocatedEvent(native_event_2, from_native) {
   // No one should ever call this on Windows.
   // TODO(msw): remove once we rid views of Gtk/Gdk.
   NOTREACHED();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // MouseWheelEvent, public:
 
 MouseWheelEvent::MouseWheelEvent(NativeEvent native_event)
     : MouseEvent(native_event),
-      offset_(GET_WHEEL_DELTA_WPARAM(native_event.wParam)) {
+      offset_(ui::GetMouseWheelOffset(native_event)) {
 }
 
 MouseWheelEvent::MouseWheelEvent(NativeEvent2 native_event_2,
                                  FromNativeEvent2 from_native)
     : MouseEvent(native_event_2, from_native) {
   // No one should ever call this on Windows.
   // TODO(msw): remove once we rid views of Gtk/Gdk.
   NOTREACHED();
 }
 
 }  // namespace views