ui/events/win/events_win.cc

   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 #include <windowsx.h>
   6
   7 #include "ui/events/event_constants.h"
   8
   9 #include "base/logging.h"
  10 #include "base/time/time.h"
  11 #include "base/win/win_util.h"
  12 #include "ui/events/event_utils.h"
  13 #include "ui/events/keycodes/keyboard_code_conversion_win.h"
  14 #include "ui/gfx/geometry/point.h"
  15 #include "ui/gfx/win/dpi.h"
  16
  17 namespace ui {
  18
  19 namespace {
  20
  21 // From MSDN: "Mouse" events are flagged with 0xFF515700 if they come
  22 // from a touch or stylus device.  In Vista or later, they are also flagged
  23 // with 0x80 if they come from touch.
  24 #define MOUSEEVENTF_FROMTOUCH (0xFF515700 | 0x80)
  25
  26 // Get the native mouse key state from the native event message type.
  27 int GetNativeMouseKey(const base::NativeEvent& native_event) {
  28   switch (native_event.message) {
  29     case WM_LBUTTONDBLCLK:
  30     case WM_LBUTTONDOWN:
  31     case WM_LBUTTONUP:
  32     case WM_NCLBUTTONDBLCLK:
  33     case WM_NCLBUTTONDOWN:
  34     case WM_NCLBUTTONUP:
  35       return MK_LBUTTON;
  36     case WM_MBUTTONDBLCLK:
  37     case WM_MBUTTONDOWN:
  38     case WM_MBUTTONUP:
  39     case WM_NCMBUTTONDBLCLK:
  40     case WM_NCMBUTTONDOWN:
  41     case WM_NCMBUTTONUP:
  42       return MK_MBUTTON;
  43     case WM_RBUTTONDBLCLK:
  44     case WM_RBUTTONDOWN:
  45     case WM_RBUTTONUP:
  46     case WM_NCRBUTTONDBLCLK:
  47     case WM_NCRBUTTONDOWN:
  48     case WM_NCRBUTTONUP:
  49       return MK_RBUTTON;
  50     case WM_NCXBUTTONDBLCLK:
  51     case WM_NCXBUTTONDOWN:
  52     case WM_NCXBUTTONUP:
  53     case WM_XBUTTONDBLCLK:
  54     case WM_XBUTTONDOWN:
  55     case WM_XBUTTONUP:
  56       return MK_XBUTTON1;
  57   }
  58   return 0;
  59 }
  60
  61 bool IsButtonDown(const base::NativeEvent& native_event) {
  62   return ((MK_LBUTTON | MK_MBUTTON | MK_RBUTTON | MK_XBUTTON1 | MK_XBUTTON2) &
  63           native_event.wParam) != 0;
  64 }
  65
  66 bool IsClientMouseEvent(const base::NativeEvent& native_event) {
  67   return native_event.message == WM_MOUSELEAVE ||
  68          native_event.message == WM_MOUSEHOVER ||
  69         (native_event.message >= WM_MOUSEFIRST &&
  70          native_event.message <= WM_MOUSELAST);
  71 }
  72
  73 bool IsNonClientMouseEvent(const base::NativeEvent& native_event) {
  74   return native_event.message == WM_NCMOUSELEAVE ||
  75          native_event.message == WM_NCMOUSEHOVER ||
  76         (native_event.message >= WM_NCMOUSEMOVE &&
  77          native_event.message <= WM_NCXBUTTONDBLCLK);
  78 }
  79
  80 bool IsMouseEvent(const base::NativeEvent& native_event) {
  81   return IsClientMouseEvent(native_event) ||
  82          IsNonClientMouseEvent(native_event);
  83 }
  84
  85 bool IsMouseWheelEvent(const base::NativeEvent& native_event) {
  86   return native_event.message == WM_MOUSEWHEEL ||
  87          native_event.message == WM_MOUSEHWHEEL;
  88 }
  89
  90 bool IsKeyEvent(const base::NativeEvent& native_event) {
  91   return native_event.message == WM_KEYDOWN ||
  92          native_event.message == WM_SYSKEYDOWN ||
  93          native_event.message == WM_CHAR ||
  94          native_event.message == WM_KEYUP ||
  95          native_event.message == WM_SYSKEYUP;
  96 }
  97
  98 bool IsScrollEvent(const base::NativeEvent& native_event) {
  99   return native_event.message == WM_VSCROLL ||
 100          native_event.message == WM_HSCROLL;
 101 }
 102
 103 // Returns a mask corresponding to the set of pressed modifier keys.
 104 // Checks the current global state and the state sent by client mouse messages.
 105 int KeyStateFlagsFromNative(const base::NativeEvent& native_event) {
 106   int flags = 0;
 107   flags |= base::win::IsAltPressed() ? EF_ALT_DOWN : EF_NONE;
 108   flags |= base::win::IsShiftPressed() ? EF_SHIFT_DOWN : EF_NONE;
 109   flags |= base::win::IsCtrlPressed() ? EF_CONTROL_DOWN : EF_NONE;
 110
 111   // Check key messages for the extended key flag.
 112   if (IsKeyEvent(native_event))
 113     flags |= (HIWORD(native_event.lParam) & KF_EXTENDED) ? EF_EXTENDED : 0;
 114
 115   // Most client mouse messages include key state information.
 116   if (IsClientMouseEvent(native_event)) {
 117     int win_flags = GET_KEYSTATE_WPARAM(native_event.wParam);
 118     flags |= (win_flags & MK_SHIFT) ? EF_SHIFT_DOWN : 0;
 119     flags |= (win_flags & MK_CONTROL) ? EF_CONTROL_DOWN : 0;
 120   }
 121
 122   return flags;
 123 }
 124
 125 // Returns a mask corresponding to the set of pressed mouse buttons.
 126 // This includes the button of the given message, even if it is being released.
 127 int MouseStateFlagsFromNative(const base::NativeEvent& native_event) {
 128   int win_flags = GetNativeMouseKey(native_event);
 129
 130   // Client mouse messages provide key states in their WPARAMs.
 131   if (IsClientMouseEvent(native_event))
 132     win_flags |= GET_KEYSTATE_WPARAM(native_event.wParam);
 133
 134   int flags = 0;
 135   flags |= (win_flags & MK_LBUTTON) ? EF_LEFT_MOUSE_BUTTON : 0;
 136   flags |= (win_flags & MK_MBUTTON) ? EF_MIDDLE_MOUSE_BUTTON : 0;
 137   flags |= (win_flags & MK_RBUTTON) ? EF_RIGHT_MOUSE_BUTTON : 0;
 138   flags |= IsNonClientMouseEvent(native_event) ? EF_IS_NON_CLIENT : 0;
 139   return flags;
 140 }
 141
 142 }  // namespace
 143
 144 void UpdateDeviceList() {
 145   NOTIMPLEMENTED();
 146 }
 147
 148 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
 149   switch (native_event.message) {
 150     case WM_KEYDOWN:
 151     case WM_SYSKEYDOWN:
 152     case WM_CHAR:
 153       return ET_KEY_PRESSED;
 154     // The WM_DEADCHAR message is posted to the window with the keyboard focus
 155     // when a WM_KEYUP message is translated. This happens for special keyboard
 156     // sequences.
 157     case WM_DEADCHAR:
 158     case WM_KEYUP:
 159     // The WM_SYSDEADCHAR message is posted to a window with keyboard focus
 160     // when the WM_SYSKEYDOWN message is translated by the TranslateMessage
 161     // function. It specifies the character code of the system dead key.
 162     case WM_SYSDEADCHAR:
 163     case WM_SYSKEYUP:
 164       return ET_KEY_RELEASED;
 165     case WM_LBUTTONDBLCLK:
 166     case WM_LBUTTONDOWN:
 167     case WM_MBUTTONDBLCLK:
 168     case WM_MBUTTONDOWN:
 169     case WM_NCLBUTTONDBLCLK:
 170     case WM_NCLBUTTONDOWN:
 171     case WM_NCMBUTTONDBLCLK:
 172     case WM_NCMBUTTONDOWN:
 173     case WM_NCRBUTTONDBLCLK:
 174     case WM_NCRBUTTONDOWN:
 175     case WM_NCXBUTTONDBLCLK:
 176     case WM_NCXBUTTONDOWN:
 177     case WM_RBUTTONDBLCLK:
 178     case WM_RBUTTONDOWN:
 179     case WM_XBUTTONDBLCLK:
 180     case WM_XBUTTONDOWN:
 181       return ET_MOUSE_PRESSED;
 182     case WM_LBUTTONUP:
 183     case WM_MBUTTONUP:
 184     case WM_NCLBUTTONUP:
 185     case WM_NCMBUTTONUP:
 186     case WM_NCRBUTTONUP:
 187     case WM_NCXBUTTONUP:
 188     case WM_RBUTTONUP:
 189     case WM_XBUTTONUP:
 190       return ET_MOUSE_RELEASED;
 191     case WM_MOUSEMOVE:
 192       return IsButtonDown(native_event) ? ET_MOUSE_DRAGGED : ET_MOUSE_MOVED;
 193     case WM_NCMOUSEMOVE:
 194       return ET_MOUSE_MOVED;
 195     case WM_MOUSEWHEEL:
 196     case WM_MOUSEHWHEEL:
 197       return ET_MOUSEWHEEL;
 198     case WM_MOUSELEAVE:
 199     case WM_NCMOUSELEAVE:
 200       return ET_MOUSE_EXITED;
 201     case WM_VSCROLL:
 202     case WM_HSCROLL:
 203       return ET_SCROLL;
 204     default:
 205       // We can't NOTREACHED() here, since this function can be called for any
 206       // message.
 207       break;
 208   }
 209   return ET_UNKNOWN;
 210 }
 211
 212 int EventFlagsFromNative(const base::NativeEvent& native_event) {
 213   int flags = KeyStateFlagsFromNative(native_event);
 214   if (IsMouseEvent(native_event))
 215     flags |= MouseStateFlagsFromNative(native_event);
 216
 217   return flags;
 218 }
 219
 220 base::TimeDelta EventTimeFromNative(const base::NativeEvent& native_event) {
 221   return base::TimeDelta::FromMilliseconds(native_event.time);
 222 }
 223
 224 gfx::Point EventLocationFromNative(const base::NativeEvent& native_event) {
 225   POINT native_point;
 226   if ((native_event.message == WM_MOUSELEAVE ||
 227        native_event.message == WM_NCMOUSELEAVE) ||
 228       IsScrollEvent(native_event)) {
 229     // These events have no coordinates. For sanity with rest of events grab
 230     // coordinates from the OS.
 231     ::GetCursorPos(&native_point);
 232   } else if (IsClientMouseEvent(native_event) &&
 233              !IsMouseWheelEvent(native_event)) {
 234     // Note: Wheel events are considered client, but their position is in screen
 235     //       coordinates.
 236     // Client message. The position is contained in the LPARAM.
 237     return gfx::Point(native_event.lParam);
 238   } else {
 239     DCHECK(IsNonClientMouseEvent(native_event) ||
 240            IsMouseWheelEvent(native_event) || IsScrollEvent(native_event));
 241     // Non-client message. The position is contained in a POINTS structure in
 242     // LPARAM, and is in screen coordinates so we have to convert to client.
 243     native_point.x = GET_X_LPARAM(native_event.lParam);
 244     native_point.y = GET_Y_LPARAM(native_event.lParam);
 245   }
 246   ScreenToClient(native_event.hwnd, &native_point);
 247   return gfx::Point(native_point);
 248 }
 249
 250 gfx::Point EventSystemLocationFromNative(
 251     const base::NativeEvent& native_event) {
 252   POINT global_point = { static_cast<short>(LOWORD(native_event.lParam)),
 253                          static_cast<short>(HIWORD(native_event.lParam)) };
 254   ClientToScreen(native_event.hwnd, &global_point);
 255   return gfx::Point(global_point);
 256 }
 257
 258 KeyboardCode KeyboardCodeFromNative(const base::NativeEvent& native_event) {
 259   return KeyboardCodeForWindowsKeyCode(static_cast<WORD>(native_event.wParam));
 260 }
 261
 262 DomCode CodeFromNative(const base::NativeEvent& native_event) {
 263   const uint16 scan_code = GetScanCodeFromLParam(native_event.lParam);
 264   return CodeForWindowsScanCode(scan_code);
 265 }
 266
 267 uint32 PlatformKeycodeFromNative(const base::NativeEvent& native_event) {
 268   return static_cast<uint32>(native_event.wParam);
 269 }
 270
 271 bool IsCharFromNative(const base::NativeEvent& native_event) {
 272   return native_event.message == WM_CHAR;
 273 }
 274
 275 int GetChangedMouseButtonFlagsFromNative(
 276     const base::NativeEvent& native_event) {
 277   switch (GetNativeMouseKey(native_event)) {
 278     case MK_LBUTTON:
 279       return EF_LEFT_MOUSE_BUTTON;
 280     case MK_MBUTTON:
 281       return EF_MIDDLE_MOUSE_BUTTON;
 282     case MK_RBUTTON:
 283       return EF_RIGHT_MOUSE_BUTTON;
 284     // TODO: add support for MK_XBUTTON1.
 285     default:
 286       break;
 287   }
 288   return 0;
 289 }
 290
 291 gfx::Vector2d GetMouseWheelOffset(const base::NativeEvent& native_event) {
 292   DCHECK(native_event.message == WM_MOUSEWHEEL ||
 293          native_event.message == WM_MOUSEHWHEEL);
 294   if (native_event.message == WM_MOUSEWHEEL)
 295     return gfx::Vector2d(0, GET_WHEEL_DELTA_WPARAM(native_event.wParam));
 296   return gfx::Vector2d(GET_WHEEL_DELTA_WPARAM(native_event.wParam), 0);
 297 }
 298
 299 base::NativeEvent CopyNativeEvent(const base::NativeEvent& event) {
 300   return event;
 301 }
 302
 303 void ReleaseCopiedNativeEvent(const base::NativeEvent& event) {
 304 }
 305
 306 void ClearTouchIdIfReleased(const base::NativeEvent& xev) {
 307   NOTIMPLEMENTED();
 308 }
 309
 310 int GetTouchId(const base::NativeEvent& xev) {
 311   NOTIMPLEMENTED();
 312   return 0;
 313 }
 314
 315 float GetTouchRadiusX(const base::NativeEvent& native_event) {
 316   NOTIMPLEMENTED();
 317   return 1.0;
 318 }
 319
 320 float GetTouchRadiusY(const base::NativeEvent& native_event) {
 321   NOTIMPLEMENTED();
 322   return 1.0;
 323 }
 324
 325 float GetTouchAngle(const base::NativeEvent& native_event) {
 326   NOTIMPLEMENTED();
 327   return 0.0;
 328 }
 329
 330 float GetTouchForce(const base::NativeEvent& native_event) {
 331   NOTIMPLEMENTED();
 332   return 0.0;
 333 }
 334
 335 bool GetScrollOffsets(const base::NativeEvent& native_event,
 336                       float* x_offset,
 337                       float* y_offset,
 338                       float* x_offset_ordinal,
 339                       float* y_offset_ordinal,
 340                       int* finger_count) {
 341   // TODO(ananta)
 342   // Support retrieving the scroll offsets from the scroll event.
 343   if (native_event.message == WM_VSCROLL || native_event.message == WM_HSCROLL)
 344     return true;
 345   return false;
 346 }
 347
 348 bool GetFlingData(const base::NativeEvent& native_event,
 349                   float* vx,
 350                   float* vy,
 351                   float* vx_ordinal,
 352                   float* vy_ordinal,
 353                   bool* is_cancel) {
 354   // Not supported in Windows.
 355   NOTIMPLEMENTED();
 356   return false;
 357 }
 358
 359 int GetModifiersFromACCEL(const ACCEL& accel) {
 360   int modifiers = EF_NONE;
 361   if (accel.fVirt & FSHIFT)
 362     modifiers |= EF_SHIFT_DOWN;
 363   if (accel.fVirt & FCONTROL)
 364     modifiers |= EF_CONTROL_DOWN;
 365   if (accel.fVirt & FALT)
 366     modifiers |= EF_ALT_DOWN;
 367   return modifiers;
 368 }
 369
 370 int GetModifiersFromKeyState() {
 371   int modifiers = EF_NONE;
 372   if (base::win::IsShiftPressed())
 373     modifiers |= EF_SHIFT_DOWN;
 374   if (base::win::IsCtrlPressed())
 375     modifiers |= EF_CONTROL_DOWN;
 376   if (base::win::IsAltPressed())
 377     modifiers |= EF_ALT_DOWN;
 378   if (base::win::IsAltGrPressed())
 379     modifiers |= EF_ALTGR_DOWN;
 380   return modifiers;
 381 }
 382
 383 // Windows emulates mouse messages for touch events.
 384 bool IsMouseEventFromTouch(UINT message) {
 385   return (message >= WM_MOUSEFIRST) && (message <= WM_MOUSELAST) &&
 386       (GetMessageExtraInfo() & MOUSEEVENTF_FROMTOUCH) ==
 387       MOUSEEVENTF_FROMTOUCH;
 388 }
 389
 390 // Conversion scan_code and LParam each other.
 391 // uint16 scan_code:
 392 //     ui/events/keycodes/dom/keycode_converter_data.inc
 393 // 0 - 15bits: represetns the scan code.
 394 // 28 - 30 bits (0xE000): represents whether this is an extended key or not.
 395 //
 396 // LPARAM lParam:
 397 //     http://msdn.microsoft.com/en-us/library/windows/desktop/ms644984.aspx
 398 // 16 - 23bits: represetns the scan code.
 399 // 24bit (0x0100): represents whether this is an extended key or not.
 400 uint16 GetScanCodeFromLParam(LPARAM l_param) {
 401   uint16 scan_code = ((l_param >> 16) & 0x00FF);
 402   if (l_param & (1 << 24))
 403     scan_code |= 0xE000;
 404   return scan_code;
 405 }
 406
 407 LPARAM GetLParamFromScanCode(uint16 scan_code) {
 408   LPARAM l_param = static_cast<LPARAM>(scan_code & 0x00FF) << 16;
 409   if ((scan_code & 0xE000) == 0xE000)
 410     l_param |= (1 << 24);
 411   return l_param;
 412 }
 413
 414 }  // namespace ui