widget/WidgetEventImpl.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "mozilla/BasicEvents.h"
   7 #include "mozilla/ContentEvents.h"
   8 #include "mozilla/EventStateManager.h"
   9 #include "mozilla/InternalMutationEvent.h"
  10 #include "mozilla/MiscEvents.h"
  11 #include "mozilla/MouseEvents.h"
  12 #include "mozilla/Preferences.h"
  13 #include "mozilla/StaticPrefs_mousewheel.h"
  14 #include "mozilla/StaticPrefs_ui.h"
  15 #include "mozilla/TextEvents.h"
  16 #include "mozilla/TouchEvents.h"
  17 #include "mozilla/dom/KeyboardEventBinding.h"
  18 #include "nsCommandParams.h"
  19 #include "nsContentUtils.h"
  20 #include "nsIContent.h"
  21 #include "nsIDragSession.h"
  22 #include "nsPrintfCString.h"
  23
  24 #if defined(XP_WIN)
  25 #  include "npapi.h"
  26 #endif
  27
  28 namespace mozilla {
  29
  30 /******************************************************************************
  31  * Global helper methods
  32  ******************************************************************************/
  33
  34 const char* ToChar(EventMessage aEventMessage) {
  35   switch (aEventMessage) {
  36 #define NS_EVENT_MESSAGE(aMessage) \
  37   case aMessage:                   \
  38     return #aMessage;
  39
  40 #include "mozilla/EventMessageList.h"
  41
  42 #undef NS_EVENT_MESSAGE
  43     default:
  44       return "illegal event message";
  45   }
  46 }
  47
  48 const char* ToChar(EventClassID aEventClassID) {
  49   switch (aEventClassID) {
  50 #define NS_ROOT_EVENT_CLASS(aPrefix, aName) \
  51   case eBasic##aName##Class:                \
  52     return "eBasic" #aName "Class";
  53
  54 #define NS_EVENT_CLASS(aPrefix, aName) \
  55   case e##aName##Class:                \
  56     return "e" #aName "Class";
  57
  58 #include "mozilla/EventClassList.h"
  59
  60 #undef NS_EVENT_CLASS
  61 #undef NS_ROOT_EVENT_CLASS
  62     default:
  63       return "illegal event class ID";
  64   }
  65 }
  66
  67 const nsCString ToString(KeyNameIndex aKeyNameIndex) {
  68   if (aKeyNameIndex == KEY_NAME_INDEX_USE_STRING) {
  69     return "USE_STRING"_ns;
  70   }
  71   nsAutoString keyName;
  72   WidgetKeyboardEvent::GetDOMKeyName(aKeyNameIndex, keyName);
  73   return NS_ConvertUTF16toUTF8(keyName);
  74 }
  75
  76 const nsCString ToString(CodeNameIndex aCodeNameIndex) {
  77   if (aCodeNameIndex == CODE_NAME_INDEX_USE_STRING) {
  78     return "USE_STRING"_ns;
  79   }
  80   nsAutoString codeName;
  81   WidgetKeyboardEvent::GetDOMCodeName(aCodeNameIndex, codeName);
  82   return NS_ConvertUTF16toUTF8(codeName);
  83 }
  84
  85 const char* ToChar(Command aCommand) {
  86   if (aCommand == Command::DoNothing) {
  87     return "CommandDoNothing";
  88   }
  89
  90   switch (aCommand) {
  91 #define NS_DEFINE_COMMAND(aName, aCommandStr) \
  92   case Command::aName:                        \
  93     return "Command::" #aName;
  94 #define NS_DEFINE_COMMAND_WITH_PARAM(aName, aCommandStr, aParam) \
  95   case Command::aName:                                           \
  96     return "Command::" #aName;
  97 #define NS_DEFINE_COMMAND_NO_EXEC_COMMAND(aName) \
  98   case Command::aName:                           \
  99     return "Command::" #aName;
 100
 101 #include "mozilla/CommandList.h"
 102
 103 #undef NS_DEFINE_COMMAND
 104 #undef NS_DEFINE_COMMAND_WITH_PARAM
 105 #undef NS_DEFINE_COMMAND_NO_EXEC_COMMAND
 106
 107     default:
 108       return "illegal command value";
 109   }
 110 }
 111
 112 const nsCString GetDOMKeyCodeName(uint32_t aKeyCode) {
 113   switch (aKeyCode) {
 114 #define NS_DISALLOW_SAME_KEYCODE
 115 #define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) \
 116   case aDOMKeyCode:                            \
 117     return nsLiteralCString(#aDOMKeyName);
 118
 119 #include "mozilla/VirtualKeyCodeList.h"
 120
 121 #undef NS_DEFINE_VK
 122 #undef NS_DISALLOW_SAME_KEYCODE
 123
 124     default:
 125       return nsPrintfCString("Invalid DOM keyCode (0x%08X)", aKeyCode);
 126   }
 127 }
 128
 129 bool IsValidRawTextRangeValue(RawTextRangeType aRawTextRangeType) {
 130   switch (static_cast<TextRangeType>(aRawTextRangeType)) {
 131     case TextRangeType::eUninitialized:
 132     case TextRangeType::eCaret:
 133     case TextRangeType::eRawClause:
 134     case TextRangeType::eSelectedRawClause:
 135     case TextRangeType::eConvertedClause:
 136     case TextRangeType::eSelectedClause:
 137       return true;
 138     default:
 139       return false;
 140   }
 141 }
 142
 143 RawTextRangeType ToRawTextRangeType(TextRangeType aTextRangeType) {
 144   return static_cast<RawTextRangeType>(aTextRangeType);
 145 }
 146
 147 TextRangeType ToTextRangeType(RawTextRangeType aRawTextRangeType) {
 148   MOZ_ASSERT(IsValidRawTextRangeValue(aRawTextRangeType));
 149   return static_cast<TextRangeType>(aRawTextRangeType);
 150 }
 151
 152 const char* ToChar(TextRangeType aTextRangeType) {
 153   switch (aTextRangeType) {
 154     case TextRangeType::eUninitialized:
 155       return "TextRangeType::eUninitialized";
 156     case TextRangeType::eCaret:
 157       return "TextRangeType::eCaret";
 158     case TextRangeType::eRawClause:
 159       return "TextRangeType::eRawClause";
 160     case TextRangeType::eSelectedRawClause:
 161       return "TextRangeType::eSelectedRawClause";
 162     case TextRangeType::eConvertedClause:
 163       return "TextRangeType::eConvertedClause";
 164     case TextRangeType::eSelectedClause:
 165       return "TextRangeType::eSelectedClause";
 166     default:
 167       return "Invalid TextRangeType";
 168   }
 169 }
 170
 171 SelectionType ToSelectionType(TextRangeType aTextRangeType) {
 172   switch (aTextRangeType) {
 173     case TextRangeType::eRawClause:
 174       return SelectionType::eIMERawClause;
 175     case TextRangeType::eSelectedRawClause:
 176       return SelectionType::eIMESelectedRawClause;
 177     case TextRangeType::eConvertedClause:
 178       return SelectionType::eIMEConvertedClause;
 179     case TextRangeType::eSelectedClause:
 180       return SelectionType::eIMESelectedClause;
 181     default:
 182       MOZ_CRASH("TextRangeType is invalid");
 183       return SelectionType::eNormal;
 184   }
 185 }
 186
 187 /******************************************************************************
 188  * non class method implementation
 189  ******************************************************************************/
 190
 191 static nsDataHashtable<nsDepCharHashKey, Command>* sCommandHashtable = nullptr;
 192
 193 Command GetInternalCommand(const char* aCommandName,
 194                            const nsCommandParams* aCommandParams) {
 195   if (!aCommandName) {
 196     return Command::DoNothing;
 197   }
 198
 199   // Special cases for "cmd_align".  It's mapped to multiple internal commands
 200   // with additional param.  Therefore, we cannot handle it with the hashtable.
 201   if (!strcmp(aCommandName, "cmd_align")) {
 202     if (!aCommandParams) {
 203       // Note that if this is called by EditorCommand::IsCommandEnabled(),
 204       // it cannot set aCommandParams.  So, don't warn in this case even though
 205       // this is illegal case for DoCommandParams().
 206       return Command::FormatJustify;
 207     }
 208     nsAutoCString cValue;
 209     nsresult rv = aCommandParams->GetCString("state_attribute", cValue);
 210     if (NS_FAILED(rv)) {
 211       nsString value;  // Avoid copying the string buffer with using nsString.
 212       rv = aCommandParams->GetString("state_attribute", value);
 213       if (NS_FAILED(rv)) {
 214         return Command::FormatJustifyNone;
 215       }
 216       cValue = NS_ConvertUTF16toUTF8(value);
 217     }
 218     if (cValue.LowerCaseEqualsASCII("left")) {
 219       return Command::FormatJustifyLeft;
 220     }
 221     if (cValue.LowerCaseEqualsASCII("right")) {
 222       return Command::FormatJustifyRight;
 223     }
 224     if (cValue.LowerCaseEqualsASCII("center")) {
 225       return Command::FormatJustifyCenter;
 226     }
 227     if (cValue.LowerCaseEqualsASCII("justify")) {
 228       return Command::FormatJustifyFull;
 229     }
 230     if (cValue.IsEmpty()) {
 231       return Command::FormatJustifyNone;
 232     }
 233     return Command::DoNothing;
 234   }
 235
 236   if (!sCommandHashtable) {
 237     sCommandHashtable = new nsDataHashtable<nsDepCharHashKey, Command>();
 238 #define NS_DEFINE_COMMAND(aName, aCommandStr) \
 239   sCommandHashtable->Put(#aCommandStr, Command::aName);
 240
 241 #define NS_DEFINE_COMMAND_WITH_PARAM(aName, aCommandStr, aParam)
 242
 243 #define NS_DEFINE_COMMAND_NO_EXEC_COMMAND(aName)
 244
 245 #include "mozilla/CommandList.h"
 246
 247 #undef NS_DEFINE_COMMAND
 248 #undef NS_DEFINE_COMMAND_WITH_PARAM
 249 #undef NS_DEFINE_COMMAND_NO_EXEC_COMMAND
 250   }
 251   Command command = Command::DoNothing;
 252   if (!sCommandHashtable->Get(aCommandName, &command)) {
 253     return Command::DoNothing;
 254   }
 255   return command;
 256 }
 257
 258 /******************************************************************************
 259  * As*Event() implementation
 260  ******************************************************************************/
 261
 262 #define NS_ROOT_EVENT_CLASS(aPrefix, aName)
 263 #define NS_EVENT_CLASS(aPrefix, aName)                         \
 264   aPrefix##aName* WidgetEvent::As##aName() { return nullptr; } \
 265                                                                \
 266   const aPrefix##aName* WidgetEvent::As##aName() const {       \
 267     return const_cast<WidgetEvent*>(this)->As##aName();        \
 268   }
 269
 270 #include "mozilla/EventClassList.h"
 271
 272 #undef NS_EVENT_CLASS
 273 #undef NS_ROOT_EVENT_CLASS
 274
 275 /******************************************************************************
 276  * mozilla::WidgetEvent
 277  *
 278  * Event struct type checking methods.
 279  ******************************************************************************/
 280
 281 bool WidgetEvent::IsQueryContentEvent() const {
 282   return mClass == eQueryContentEventClass;
 283 }
 284
 285 bool WidgetEvent::IsSelectionEvent() const {
 286   return mClass == eSelectionEventClass;
 287 }
 288
 289 bool WidgetEvent::IsContentCommandEvent() const {
 290   return mClass == eContentCommandEventClass;
 291 }
 292
 293 bool WidgetEvent::IsNativeEventDelivererForPlugin() const {
 294   return mClass == ePluginEventClass;
 295 }
 296
 297 /******************************************************************************
 298  * mozilla::WidgetEvent
 299  *
 300  * Event message checking methods.
 301  ******************************************************************************/
 302
 303 bool WidgetEvent::HasMouseEventMessage() const {
 304   switch (mMessage) {
 305     case eMouseDown:
 306     case eMouseUp:
 307     case eMouseClick:
 308     case eMouseDoubleClick:
 309     case eMouseAuxClick:
 310     case eMouseEnterIntoWidget:
 311     case eMouseExitFromWidget:
 312     case eMouseActivate:
 313     case eMouseOver:
 314     case eMouseOut:
 315     case eMouseHitTest:
 316     case eMouseMove:
 317       return true;
 318     default:
 319       return false;
 320   }
 321 }
 322
 323 bool WidgetEvent::HasDragEventMessage() const {
 324   switch (mMessage) {
 325     case eDragEnter:
 326     case eDragOver:
 327     case eDragExit:
 328     case eDrag:
 329     case eDragEnd:
 330     case eDragStart:
 331     case eDrop:
 332     case eDragLeave:
 333       return true;
 334     default:
 335       return false;
 336   }
 337 }
 338
 339 /* static */
 340 bool WidgetEvent::IsKeyEventMessage(EventMessage aMessage) {
 341   switch (aMessage) {
 342     case eKeyDown:
 343     case eKeyPress:
 344     case eKeyUp:
 345     case eKeyDownOnPlugin:
 346     case eKeyUpOnPlugin:
 347     case eAccessKeyNotFound:
 348       return true;
 349     default:
 350       return false;
 351   }
 352 }
 353
 354 bool WidgetEvent::HasIMEEventMessage() const {
 355   switch (mMessage) {
 356     case eCompositionStart:
 357     case eCompositionEnd:
 358     case eCompositionUpdate:
 359     case eCompositionChange:
 360     case eCompositionCommitAsIs:
 361     case eCompositionCommit:
 362       return true;
 363     default:
 364       return false;
 365   }
 366 }
 367
 368 bool WidgetEvent::HasPluginActivationEventMessage() const {
 369   return mMessage == ePluginActivate || mMessage == ePluginFocus;
 370 }
 371
 372 /******************************************************************************
 373  * mozilla::WidgetEvent
 374  *
 375  * Specific event checking methods.
 376  ******************************************************************************/
 377
 378 bool WidgetEvent::CanBeSentToRemoteProcess() const {
 379   // If this event is explicitly marked as shouldn't be sent to remote process,
 380   // just return false.
 381   if (IsCrossProcessForwardingStopped()) {
 382     return false;
 383   }
 384
 385   if (mClass == eKeyboardEventClass || mClass == eWheelEventClass) {
 386     return true;
 387   }
 388
 389   switch (mMessage) {
 390     case eMouseDown:
 391     case eMouseUp:
 392     case eMouseMove:
 393     case eContextMenu:
 394     case eMouseEnterIntoWidget:
 395     case eMouseExitFromWidget:
 396     case eMouseTouchDrag:
 397     case eTouchStart:
 398     case eTouchMove:
 399     case eTouchEnd:
 400     case eTouchCancel:
 401     case eDragOver:
 402     case eDragExit:
 403     case eDrop:
 404       return true;
 405 #if defined(XP_WIN)
 406     case ePluginInputEvent: {
 407       auto evt = static_cast<const NPEvent*>(AsPluginEvent()->mPluginEvent);
 408       return evt && evt->event == WM_SETTINGCHANGE &&
 409              (evt->wParam == SPI_SETWHEELSCROLLLINES ||
 410               evt->wParam == SPI_SETWHEELSCROLLCHARS);
 411     }
 412 #endif
 413     default:
 414       return false;
 415   }
 416 }
 417
 418 bool WidgetEvent::WillBeSentToRemoteProcess() const {
 419   // This event won't be posted to remote process if it's already explicitly
 420   // stopped.
 421   if (IsCrossProcessForwardingStopped()) {
 422     return false;
 423   }
 424
 425   // When mOriginalTarget is nullptr, this method shouldn't be used.
 426   if (NS_WARN_IF(!mOriginalTarget)) {
 427     return false;
 428   }
 429
 430   nsCOMPtr<nsIContent> originalTarget = do_QueryInterface(mOriginalTarget);
 431   return EventStateManager::IsTopLevelRemoteTarget(originalTarget);
 432 }
 433
 434 bool WidgetEvent::IsRetargetedNativeEventDelivererForPlugin() const {
 435   const WidgetPluginEvent* pluginEvent = AsPluginEvent();
 436   return pluginEvent && pluginEvent->mRetargetToFocusedDocument;
 437 }
 438
 439 bool WidgetEvent::IsNonRetargetedNativeEventDelivererForPlugin() const {
 440   const WidgetPluginEvent* pluginEvent = AsPluginEvent();
 441   return pluginEvent && !pluginEvent->mRetargetToFocusedDocument;
 442 }
 443
 444 bool WidgetEvent::IsIMERelatedEvent() const {
 445   return HasIMEEventMessage() || IsQueryContentEvent() || IsSelectionEvent();
 446 }
 447
 448 bool WidgetEvent::IsUsingCoordinates() const {
 449   const WidgetMouseEvent* mouseEvent = AsMouseEvent();
 450   if (mouseEvent) {
 451     return !mouseEvent->IsContextMenuKeyEvent();
 452   }
 453   return !HasKeyEventMessage() && !IsIMERelatedEvent() &&
 454          !HasPluginActivationEventMessage() &&
 455          !IsNativeEventDelivererForPlugin() && !IsContentCommandEvent();
 456 }
 457
 458 bool WidgetEvent::IsTargetedAtFocusedWindow() const {
 459   const WidgetMouseEvent* mouseEvent = AsMouseEvent();
 460   if (mouseEvent) {
 461     return mouseEvent->IsContextMenuKeyEvent();
 462   }
 463   return HasKeyEventMessage() || IsIMERelatedEvent() ||
 464          IsContentCommandEvent() || IsRetargetedNativeEventDelivererForPlugin();
 465 }
 466
 467 bool WidgetEvent::IsTargetedAtFocusedContent() const {
 468   const WidgetMouseEvent* mouseEvent = AsMouseEvent();
 469   if (mouseEvent) {
 470     return mouseEvent->IsContextMenuKeyEvent();
 471   }
 472   return HasKeyEventMessage() || IsIMERelatedEvent() ||
 473          IsRetargetedNativeEventDelivererForPlugin();
 474 }
 475
 476 bool WidgetEvent::IsAllowedToDispatchDOMEvent() const {
 477   switch (mClass) {
 478     case eMouseEventClass:
 479       if (mMessage == eMouseTouchDrag) {
 480         return false;
 481       }
 482       [[fallthrough]];
 483     case ePointerEventClass:
 484       // We want synthesized mouse moves to cause mouseover and mouseout
 485       // DOM events (EventStateManager::PreHandleEvent), but not mousemove
 486       // DOM events.
 487       // Synthesized button up events also do not cause DOM events because they
 488       // do not have a reliable mRefPoint.
 489       return AsMouseEvent()->mReason == WidgetMouseEvent::eReal;
 490
 491     case eWheelEventClass: {
 492       // wheel event whose all delta values are zero by user pref applied, it
 493       // shouldn't cause a DOM event.
 494       const WidgetWheelEvent* wheelEvent = AsWheelEvent();
 495       return wheelEvent->mDeltaX != 0.0 || wheelEvent->mDeltaY != 0.0 ||
 496              wheelEvent->mDeltaZ != 0.0;
 497     }
 498     case eTouchEventClass:
 499       return mMessage != eTouchPointerCancel;
 500     // Following events are handled in EventStateManager, so, we don't need to
 501     // dispatch DOM event for them into the DOM tree.
 502     case eQueryContentEventClass:
 503     case eSelectionEventClass:
 504     case eContentCommandEventClass:
 505       return false;
 506
 507     default:
 508       return true;
 509   }
 510 }
 511
 512 bool WidgetEvent::IsAllowedToDispatchInSystemGroup() const {
 513   // We don't expect to implement default behaviors with pointer events because
 514   // if we do, prevent default on mouse events can't prevent default behaviors
 515   // anymore.
 516   return mClass != ePointerEventClass;
 517 }
 518
 519 bool WidgetEvent::IsBlockedForFingerprintingResistance() const {
 520   if (!nsContentUtils::ShouldResistFingerprinting()) {
 521     return false;
 522   }
 523
 524   switch (mClass) {
 525     case eKeyboardEventClass: {
 526       const WidgetKeyboardEvent* keyboardEvent = AsKeyboardEvent();
 527
 528       return (keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Alt ||
 529               keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Shift ||
 530               keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Control ||
 531               keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_AltGraph);
 532     }
 533     case ePointerEventClass: {
 534       const WidgetPointerEvent* pointerEvent = AsPointerEvent();
 535
 536       // We suppress the pointer events if it is not primary for fingerprinting
 537       // resistance. It is because of that we want to spoof any pointer event
 538       // into a mouse pointer event and the mouse pointer event only has
 539       // isPrimary as true.
 540       return !pointerEvent->mIsPrimary;
 541     }
 542     default:
 543       return false;
 544   }
 545 }
 546
 547 /******************************************************************************
 548  * mozilla::WidgetEvent
 549  *
 550  * Misc methods.
 551  ******************************************************************************/
 552
 553 static dom::EventTarget* GetTargetForDOMEvent(dom::EventTarget* aTarget) {
 554   return aTarget ? aTarget->GetTargetForDOMEvent() : nullptr;
 555 }
 556
 557 dom::EventTarget* WidgetEvent::GetDOMEventTarget() const {
 558   return GetTargetForDOMEvent(mTarget);
 559 }
 560
 561 dom::EventTarget* WidgetEvent::GetCurrentDOMEventTarget() const {
 562   return GetTargetForDOMEvent(mCurrentTarget);
 563 }
 564
 565 dom::EventTarget* WidgetEvent::GetOriginalDOMEventTarget() const {
 566   if (mOriginalTarget) {
 567     return GetTargetForDOMEvent(mOriginalTarget);
 568   }
 569   return GetDOMEventTarget();
 570 }
 571
 572 void WidgetEvent::PreventDefault(bool aCalledByDefaultHandler,
 573                                  nsIPrincipal* aPrincipal) {
 574   if (mMessage == ePointerDown) {
 575     if (aCalledByDefaultHandler) {
 576       // Shouldn't prevent default on pointerdown by default handlers to stop
 577       // firing legacy mouse events. Use MOZ_ASSERT to catch incorrect usages
 578       // in debug builds.
 579       MOZ_ASSERT(false);
 580       return;
 581     }
 582     if (aPrincipal) {
 583       nsAutoString addonId;
 584       Unused << NS_WARN_IF(NS_FAILED(aPrincipal->GetAddonId(addonId)));
 585       if (!addonId.IsEmpty()) {
 586         // Ignore the case that it's called by a web extension.
 587         return;
 588       }
 589     }
 590   }
 591   mFlags.PreventDefault(aCalledByDefaultHandler);
 592 }
 593
 594 bool WidgetEvent::IsUserAction() const {
 595   if (!IsTrusted()) {
 596     return false;
 597   }
 598   // FYI: eMouseScrollEventClass and ePointerEventClass represent
 599   //      user action but they are synthesized events.
 600   switch (mClass) {
 601     case eKeyboardEventClass:
 602     case eCompositionEventClass:
 603     case eMouseScrollEventClass:
 604     case eWheelEventClass:
 605     case eGestureNotifyEventClass:
 606     case eSimpleGestureEventClass:
 607     case eTouchEventClass:
 608     case eCommandEventClass:
 609     case eContentCommandEventClass:
 610     case ePluginEventClass:
 611       return true;
 612     case eMouseEventClass:
 613     case eDragEventClass:
 614     case ePointerEventClass:
 615       return AsMouseEvent()->IsReal();
 616     default:
 617       return false;
 618   }
 619 }
 620
 621 /******************************************************************************
 622  * mozilla::WidgetInputEvent
 623  ******************************************************************************/
 624
 625 /* static */
 626 Modifier WidgetInputEvent::GetModifier(const nsAString& aDOMKeyName) {
 627   if (aDOMKeyName.EqualsLiteral("Accel")) {
 628     return AccelModifier();
 629   }
 630   KeyNameIndex keyNameIndex = WidgetKeyboardEvent::GetKeyNameIndex(aDOMKeyName);
 631   return WidgetKeyboardEvent::GetModifierForKeyName(keyNameIndex);
 632 }
 633
 634 /* static */
 635 Modifier WidgetInputEvent::AccelModifier() {
 636   static Modifier sAccelModifier = MODIFIER_NONE;
 637   if (sAccelModifier == MODIFIER_NONE) {
 638     switch (Preferences::GetInt("ui.key.accelKey", 0)) {
 639       case dom::KeyboardEvent_Binding::DOM_VK_META:
 640         sAccelModifier = MODIFIER_META;
 641         break;
 642       case dom::KeyboardEvent_Binding::DOM_VK_WIN:
 643         sAccelModifier = MODIFIER_OS;
 644         break;
 645       case dom::KeyboardEvent_Binding::DOM_VK_ALT:
 646         sAccelModifier = MODIFIER_ALT;
 647         break;
 648       case dom::KeyboardEvent_Binding::DOM_VK_CONTROL:
 649         sAccelModifier = MODIFIER_CONTROL;
 650         break;
 651       default:
 652 #ifdef XP_MACOSX
 653         sAccelModifier = MODIFIER_META;
 654 #else
 655         sAccelModifier = MODIFIER_CONTROL;
 656 #endif
 657         break;
 658     }
 659   }
 660   return sAccelModifier;
 661 }
 662
 663 /******************************************************************************
 664  * mozilla::WidgetMouseEvent (MouseEvents.h)
 665  ******************************************************************************/
 666
 667 /* static */
 668 bool WidgetMouseEvent::IsMiddleClickPasteEnabled() {
 669   return Preferences::GetBool("middlemouse.paste", false);
 670 }
 671
 672 /******************************************************************************
 673  * mozilla::WidgetDragEvent (MouseEvents.h)
 674  ******************************************************************************/
 675
 676 void WidgetDragEvent::InitDropEffectForTests() {
 677   MOZ_ASSERT(mFlags.mIsSynthesizedForTests);
 678
 679   nsCOMPtr<nsIDragSession> session = nsContentUtils::GetDragSession();
 680   if (NS_WARN_IF(!session)) {
 681     return;
 682   }
 683
 684   uint32_t effectAllowed = session->GetEffectAllowedForTests();
 685   uint32_t desiredDropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
 686 #ifdef XP_MACOSX
 687   if (IsAlt()) {
 688     desiredDropEffect = IsMeta() ? nsIDragService::DRAGDROP_ACTION_LINK
 689                                  : nsIDragService::DRAGDROP_ACTION_COPY;
 690   }
 691 #else
 692   // On Linux, we know user's intention from API, but we should use
 693   // same modifiers as Windows for tests because GNOME on Ubuntu use
 694   // them and that makes each test simpler.
 695   if (IsControl()) {
 696     desiredDropEffect = IsShift() ? nsIDragService::DRAGDROP_ACTION_LINK
 697                                   : nsIDragService::DRAGDROP_ACTION_COPY;
 698   } else if (IsShift()) {
 699     desiredDropEffect = nsIDragService::DRAGDROP_ACTION_MOVE;
 700   }
 701 #endif  // #ifdef XP_MACOSX #else
 702   // First, use modifier state for preferring action which is explicitly
 703   // specified by the synthesizer.
 704   if (!(desiredDropEffect &= effectAllowed)) {
 705     // Otherwise, use an action which is allowed at starting the session.
 706     desiredDropEffect = effectAllowed;
 707   }
 708   if (desiredDropEffect & nsIDragService::DRAGDROP_ACTION_MOVE) {
 709     session->SetDragAction(nsIDragService::DRAGDROP_ACTION_MOVE);
 710   } else if (desiredDropEffect & nsIDragService::DRAGDROP_ACTION_COPY) {
 711     session->SetDragAction(nsIDragService::DRAGDROP_ACTION_COPY);
 712   } else if (desiredDropEffect & nsIDragService::DRAGDROP_ACTION_LINK) {
 713     session->SetDragAction(nsIDragService::DRAGDROP_ACTION_LINK);
 714   } else {
 715     session->SetDragAction(nsIDragService::DRAGDROP_ACTION_NONE);
 716   }
 717 }
 718
 719 /******************************************************************************
 720  * mozilla::WidgetWheelEvent (MouseEvents.h)
 721  ******************************************************************************/
 722
 723 /* static */
 724 double WidgetWheelEvent::ComputeOverriddenDelta(double aDelta,
 725                                                 bool aIsForVertical) {
 726   if (!StaticPrefs::
 727           mousewheel_system_scroll_override_on_root_content_enabled()) {
 728     return aDelta;
 729   }
 730   int32_t intFactor =
 731       aIsForVertical
 732           ? StaticPrefs::
 733                 mousewheel_system_scroll_override_on_root_content_vertical_factor()
 734           : StaticPrefs::
 735                 mousewheel_system_scroll_override_on_root_content_horizontal_factor();
 736   // Making the scroll speed slower doesn't make sense. So, ignore odd factor
 737   // which is less than 1.0.
 738   if (intFactor <= 100) {
 739     return aDelta;
 740   }
 741   double factor = static_cast<double>(intFactor) / 100;
 742   return aDelta * factor;
 743 }
 744
 745 double WidgetWheelEvent::OverriddenDeltaX() const {
 746   if (!mAllowToOverrideSystemScrollSpeed) {
 747     return mDeltaX;
 748   }
 749   return ComputeOverriddenDelta(mDeltaX, false);
 750 }
 751
 752 double WidgetWheelEvent::OverriddenDeltaY() const {
 753   if (!mAllowToOverrideSystemScrollSpeed) {
 754     return mDeltaY;
 755   }
 756   return ComputeOverriddenDelta(mDeltaY, true);
 757 }
 758
 759 /******************************************************************************
 760  * mozilla::WidgetKeyboardEvent (TextEvents.h)
 761  ******************************************************************************/
 762
 763 #define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) (u"" aDOMKeyName),
 764 const char16_t* const WidgetKeyboardEvent::kKeyNames[] = {
 765 #include "mozilla/KeyNameList.h"
 766 };
 767 #undef NS_DEFINE_KEYNAME
 768
 769 #define NS_DEFINE_PHYSICAL_KEY_CODE_NAME(aCPPName, aDOMCodeName) \
 770   (u"" aDOMCodeName),
 771 const char16_t* const WidgetKeyboardEvent::kCodeNames[] = {
 772 #include "mozilla/PhysicalKeyCodeNameList.h"
 773 };
 774 #undef NS_DEFINE_PHYSICAL_KEY_CODE_NAME
 775
 776 WidgetKeyboardEvent::KeyNameIndexHashtable*
 777     WidgetKeyboardEvent::sKeyNameIndexHashtable = nullptr;
 778 WidgetKeyboardEvent::CodeNameIndexHashtable*
 779     WidgetKeyboardEvent::sCodeNameIndexHashtable = nullptr;
 780
 781 void WidgetKeyboardEvent::InitAllEditCommands() {
 782   // If the event was created without widget, e.g., created event in chrome
 783   // script, this shouldn't execute native key bindings.
 784   if (NS_WARN_IF(!mWidget)) {
 785     return;
 786   }
 787
 788   // This event should be trusted event here and we shouldn't expose native
 789   // key binding information to web contents with untrusted events.
 790   if (NS_WARN_IF(!IsTrusted())) {
 791     return;
 792   }
 793
 794   MOZ_ASSERT(
 795       XRE_IsParentProcess(),
 796       "It's too expensive to retrieve all edit commands from remote process");
 797   MOZ_ASSERT(!AreAllEditCommandsInitialized(),
 798              "Shouldn't be called two or more times");
 799
 800   DebugOnly<bool> okIgnored =
 801       InitEditCommandsFor(nsIWidget::NativeKeyBindingsForSingleLineEditor);
 802   NS_WARNING_ASSERTION(
 803       okIgnored,
 804       "InitEditCommandsFor(nsIWidget::NativeKeyBindingsForSingleLineEditor) "
 805       "failed, but ignored");
 806   okIgnored =
 807       InitEditCommandsFor(nsIWidget::NativeKeyBindingsForMultiLineEditor);
 808   NS_WARNING_ASSERTION(
 809       okIgnored,
 810       "InitEditCommandsFor(nsIWidget::NativeKeyBindingsForMultiLineEditor) "
 811       "failed, but ignored");
 812   okIgnored =
 813       InitEditCommandsFor(nsIWidget::NativeKeyBindingsForRichTextEditor);
 814   NS_WARNING_ASSERTION(
 815       okIgnored,
 816       "InitEditCommandsFor(nsIWidget::NativeKeyBindingsForRichTextEditor) "
 817       "failed, but ignored");
 818 }
 819
 820 bool WidgetKeyboardEvent::InitEditCommandsFor(
 821     nsIWidget::NativeKeyBindingsType aType) {
 822   if (NS_WARN_IF(!mWidget) || NS_WARN_IF(!IsTrusted())) {
 823     return false;
 824   }
 825
 826   bool& initialized = IsEditCommandsInitializedRef(aType);
 827   if (initialized) {
 828     return true;
 829   }
 830   nsTArray<CommandInt>& commands = EditCommandsRef(aType);
 831   initialized = mWidget->GetEditCommands(aType, *this, commands);
 832   return initialized;
 833 }
 834
 835 bool WidgetKeyboardEvent::ExecuteEditCommands(
 836     nsIWidget::NativeKeyBindingsType aType, DoCommandCallback aCallback,
 837     void* aCallbackData) {
 838   // If the event was created without widget, e.g., created event in chrome
 839   // script, this shouldn't execute native key bindings.
 840   if (NS_WARN_IF(!mWidget)) {
 841     return false;
 842   }
 843
 844   // This event should be trusted event here and we shouldn't expose native
 845   // key binding information to web contents with untrusted events.
 846   if (NS_WARN_IF(!IsTrusted())) {
 847     return false;
 848   }
 849
 850   if (NS_WARN_IF(!InitEditCommandsFor(aType))) {
 851     return false;
 852   }
 853
 854   const nsTArray<CommandInt>& commands = EditCommandsRef(aType);
 855   if (commands.IsEmpty()) {
 856     return false;
 857   }
 858
 859   for (CommandInt command : commands) {
 860     aCallback(static_cast<Command>(command), aCallbackData);
 861   }
 862   return true;
 863 }
 864
 865 bool WidgetKeyboardEvent::ShouldCauseKeypressEvents() const {
 866   // Currently, we don't dispatch keypress events of modifier keys and
 867   // dead keys.
 868   switch (mKeyNameIndex) {
 869     case KEY_NAME_INDEX_Alt:
 870     case KEY_NAME_INDEX_AltGraph:
 871     case KEY_NAME_INDEX_CapsLock:
 872     case KEY_NAME_INDEX_Control:
 873     case KEY_NAME_INDEX_Fn:
 874     case KEY_NAME_INDEX_FnLock:
 875     // case KEY_NAME_INDEX_Hyper:
 876     case KEY_NAME_INDEX_Meta:
 877     case KEY_NAME_INDEX_NumLock:
 878     case KEY_NAME_INDEX_OS:
 879     case KEY_NAME_INDEX_ScrollLock:
 880     case KEY_NAME_INDEX_Shift:
 881     // case KEY_NAME_INDEX_Super:
 882     case KEY_NAME_INDEX_Symbol:
 883     case KEY_NAME_INDEX_SymbolLock:
 884     case KEY_NAME_INDEX_Dead:
 885       return false;
 886     default:
 887       return true;
 888   }
 889 }
 890
 891 static bool HasASCIIDigit(const ShortcutKeyCandidateArray& aCandidates) {
 892   for (uint32_t i = 0; i < aCandidates.Length(); ++i) {
 893     uint32_t ch = aCandidates[i].mCharCode;
 894     if (ch >= '0' && ch <= '9') return true;
 895   }
 896   return false;
 897 }
 898
 899 static bool CharsCaseInsensitiveEqual(uint32_t aChar1, uint32_t aChar2) {
 900   return aChar1 == aChar2 || (IS_IN_BMP(aChar1) && IS_IN_BMP(aChar2) &&
 901                               ToLowerCase(static_cast<char16_t>(aChar1)) ==
 902                                   ToLowerCase(static_cast<char16_t>(aChar2)));
 903 }
 904
 905 static bool IsCaseChangeableChar(uint32_t aChar) {
 906   return IS_IN_BMP(aChar) && ToLowerCase(static_cast<char16_t>(aChar)) !=
 907                                  ToUpperCase(static_cast<char16_t>(aChar));
 908 }
 909
 910 void WidgetKeyboardEvent::GetShortcutKeyCandidates(
 911     ShortcutKeyCandidateArray& aCandidates) const {
 912   MOZ_ASSERT(aCandidates.IsEmpty(), "aCandidates must be empty");
 913
 914   // ShortcutKeyCandidate::mCharCode is a candidate charCode.
 915   // ShortcutKeyCandidate::mIgnoreShift means the mCharCode should be tried to
 916   // execute a command with/without shift key state. If this is TRUE, the
 917   // shifted key state should be ignored. Otherwise, don't ignore the state.
 918   // the priority of the charCodes are (shift key is not pressed):
 919   //   0: PseudoCharCode()/false,
 920   //   1: unshiftedCharCodes[0]/false, 2: unshiftedCharCodes[1]/false...
 921   // the priority of the charCodes are (shift key is pressed):
 922   //   0: PseudoCharCode()/false,
 923   //   1: shiftedCharCodes[0]/false, 2: shiftedCharCodes[0]/true,
 924   //   3: shiftedCharCodes[1]/false, 4: shiftedCharCodes[1]/true...
 925   uint32_t pseudoCharCode = PseudoCharCode();
 926   if (pseudoCharCode) {
 927     ShortcutKeyCandidate key(pseudoCharCode, false);
 928     aCandidates.AppendElement(key);
 929   }
 930
 931   uint32_t len = mAlternativeCharCodes.Length();
 932   if (!IsShift()) {
 933     for (uint32_t i = 0; i < len; ++i) {
 934       uint32_t ch = mAlternativeCharCodes[i].mUnshiftedCharCode;
 935       if (!ch || ch == pseudoCharCode) {
 936         continue;
 937       }
 938       ShortcutKeyCandidate key(ch, false);
 939       aCandidates.AppendElement(key);
 940     }
 941     // If unshiftedCharCodes doesn't have numeric but shiftedCharCode has it,
 942     // this keyboard layout is AZERTY or similar layout, probably.
 943     // In this case, Accel+[0-9] should be accessible without shift key.
 944     // However, the priority should be lowest.
 945     if (!HasASCIIDigit(aCandidates)) {
 946       for (uint32_t i = 0; i < len; ++i) {
 947         uint32_t ch = mAlternativeCharCodes[i].mShiftedCharCode;
 948         if (ch >= '0' && ch <= '9') {
 949           ShortcutKeyCandidate key(ch, false);
 950           aCandidates.AppendElement(key);
 951           break;
 952         }
 953       }
 954     }
 955   } else {
 956     for (uint32_t i = 0; i < len; ++i) {
 957       uint32_t ch = mAlternativeCharCodes[i].mShiftedCharCode;
 958       if (!ch) {
 959         continue;
 960       }
 961
 962       if (ch != pseudoCharCode) {
 963         ShortcutKeyCandidate key(ch, false);
 964         aCandidates.AppendElement(key);
 965       }
 966
 967       // If the char is an alphabet, the shift key state should not be
 968       // ignored. E.g., Ctrl+Shift+C should not execute Ctrl+C.
 969
 970       // And checking the charCode is same as unshiftedCharCode too.
 971       // E.g., for Ctrl+Shift+(Plus of Numpad) should not run Ctrl+Plus.
 972       uint32_t unshiftCh = mAlternativeCharCodes[i].mUnshiftedCharCode;
 973       if (CharsCaseInsensitiveEqual(ch, unshiftCh)) {
 974         continue;
 975       }
 976
 977       // On the Hebrew keyboard layout on Windows, the unshifted char is a
 978       // localized character but the shifted char is a Latin alphabet,
 979       // then, we should not execute without the shift state. See bug 433192.
 980       if (IsCaseChangeableChar(ch)) {
 981         continue;
 982       }
 983
 984       // Setting the alternative charCode candidates for retry without shift
 985       // key state only when the shift key is pressed.
 986       ShortcutKeyCandidate key(ch, true);
 987       aCandidates.AppendElement(key);
 988     }
 989   }
 990
 991   // Special case for "Space" key.  With some keyboard layouts, "Space" with
 992   // or without Shift key causes non-ASCII space.  For such keyboard layouts,
 993   // we should guarantee that the key press works as an ASCII white space key
 994   // press.  However, if the space key is assigned to a function key, it
 995   // shouldn't work as a space key.
 996   if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
 997       mCodeNameIndex == CODE_NAME_INDEX_Space && pseudoCharCode != ' ') {
 998     ShortcutKeyCandidate spaceKey(' ', false);
 999     aCandidates.AppendElement(spaceKey);
1000   }
1001 }
1002
1003 void WidgetKeyboardEvent::GetAccessKeyCandidates(
1004     nsTArray<uint32_t>& aCandidates) const {
1005   MOZ_ASSERT(aCandidates.IsEmpty(), "aCandidates must be empty");
1006
1007   // return the lower cased charCode candidates for access keys.
1008   // the priority of the charCodes are:
1009   //   0: charCode, 1: unshiftedCharCodes[0], 2: shiftedCharCodes[0]
1010   //   3: unshiftedCharCodes[1], 4: shiftedCharCodes[1],...
1011   uint32_t pseudoCharCode = PseudoCharCode();
1012   if (pseudoCharCode) {
1013     uint32_t ch = pseudoCharCode;
1014     if (IS_IN_BMP(ch)) {
1015       ch = ToLowerCase(static_cast<char16_t>(ch));
1016     }
1017     aCandidates.AppendElement(ch);
1018   }
1019   for (uint32_t i = 0; i < mAlternativeCharCodes.Length(); ++i) {
1020     uint32_t ch[2] = {mAlternativeCharCodes[i].mUnshiftedCharCode,
1021                       mAlternativeCharCodes[i].mShiftedCharCode};
1022     for (uint32_t j = 0; j < 2; ++j) {
1023       if (!ch[j]) {
1024         continue;
1025       }
1026       if (IS_IN_BMP(ch[j])) {
1027         ch[j] = ToLowerCase(static_cast<char16_t>(ch[j]));
1028       }
1029       // Don't append the charcode that was already appended.
1030       if (aCandidates.IndexOf(ch[j]) == aCandidates.NoIndex) {
1031         aCandidates.AppendElement(ch[j]);
1032       }
1033     }
1034   }
1035   // Special case for "Space" key.  With some keyboard layouts, "Space" with
1036   // or without Shift key causes non-ASCII space.  For such keyboard layouts,
1037   // we should guarantee that the key press works as an ASCII white space key
1038   // press.  However, if the space key is assigned to a function key, it
1039   // shouldn't work as a space key.
1040   if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
1041       mCodeNameIndex == CODE_NAME_INDEX_Space && pseudoCharCode != ' ') {
1042     aCandidates.AppendElement(' ');
1043   }
1044 }
1045
1046 // mask values for ui.key.chromeAccess and ui.key.contentAccess
1047 #define NS_MODIFIER_SHIFT 1
1048 #define NS_MODIFIER_CONTROL 2
1049 #define NS_MODIFIER_ALT 4
1050 #define NS_MODIFIER_META 8
1051 #define NS_MODIFIER_OS 16
1052
1053 static Modifiers PrefFlagsToModifiers(int32_t aPrefFlags) {
1054   Modifiers result = 0;
1055   if (aPrefFlags & NS_MODIFIER_SHIFT) {
1056     result |= MODIFIER_SHIFT;
1057   }
1058   if (aPrefFlags & NS_MODIFIER_CONTROL) {
1059     result |= MODIFIER_CONTROL;
1060   }
1061   if (aPrefFlags & NS_MODIFIER_ALT) {
1062     result |= MODIFIER_ALT;
1063   }
1064   if (aPrefFlags & NS_MODIFIER_META) {
1065     result |= MODIFIER_META;
1066   }
1067   if (aPrefFlags & NS_MODIFIER_OS) {
1068     result |= MODIFIER_OS;
1069   }
1070   return result;
1071 }
1072
1073 bool WidgetKeyboardEvent::ModifiersMatchWithAccessKey(
1074     AccessKeyType aType) const {
1075   if (!ModifiersForAccessKeyMatching()) {
1076     return false;
1077   }
1078   return ModifiersForAccessKeyMatching() == AccessKeyModifiers(aType);
1079 }
1080
1081 Modifiers WidgetKeyboardEvent::ModifiersForAccessKeyMatching() const {
1082   static const Modifiers kModifierMask = MODIFIER_SHIFT | MODIFIER_CONTROL |
1083                                          MODIFIER_ALT | MODIFIER_META |
1084                                          MODIFIER_OS;
1085   return mModifiers & kModifierMask;
1086 }
1087
1088 /* static */
1089 Modifiers WidgetKeyboardEvent::AccessKeyModifiers(AccessKeyType aType) {
1090   switch (StaticPrefs::ui_key_generalAccessKey()) {
1091     case -1:
1092       break;  // use the individual prefs
1093     case NS_VK_SHIFT:
1094       return MODIFIER_SHIFT;
1095     case NS_VK_CONTROL:
1096       return MODIFIER_CONTROL;
1097     case NS_VK_ALT:
1098       return MODIFIER_ALT;
1099     case NS_VK_META:
1100       return MODIFIER_META;
1101     case NS_VK_WIN:
1102       return MODIFIER_OS;
1103     default:
1104       return MODIFIER_NONE;
1105   }
1106
1107   switch (aType) {
1108     case AccessKeyType::eChrome:
1109       return PrefFlagsToModifiers(StaticPrefs::ui_key_chromeAccess());
1110     case AccessKeyType::eContent:
1111       return PrefFlagsToModifiers(StaticPrefs::ui_key_contentAccess());
1112     default:
1113       return MODIFIER_NONE;
1114   }
1115 }
1116
1117 /* static */
1118 void WidgetKeyboardEvent::Shutdown() {
1119   delete sKeyNameIndexHashtable;
1120   sKeyNameIndexHashtable = nullptr;
1121   delete sCodeNameIndexHashtable;
1122   sCodeNameIndexHashtable = nullptr;
1123   // Although sCommandHashtable is not a member of WidgetKeyboardEvent, but
1124   // let's delete it here since we need to do it at same time.
1125   delete sCommandHashtable;
1126   sCommandHashtable = nullptr;
1127 }
1128
1129 /* static */
1130 void WidgetKeyboardEvent::GetDOMKeyName(KeyNameIndex aKeyNameIndex,
1131                                         nsAString& aKeyName) {
1132   if (aKeyNameIndex >= KEY_NAME_INDEX_USE_STRING) {
1133     aKeyName.Truncate();
1134     return;
1135   }
1136
1137   MOZ_RELEASE_ASSERT(
1138       static_cast<size_t>(aKeyNameIndex) < ArrayLength(kKeyNames),
1139       "Illegal key enumeration value");
1140   aKeyName = kKeyNames[aKeyNameIndex];
1141 }
1142
1143 /* static */
1144 void WidgetKeyboardEvent::GetDOMCodeName(CodeNameIndex aCodeNameIndex,
1145                                          nsAString& aCodeName) {
1146   if (aCodeNameIndex >= CODE_NAME_INDEX_USE_STRING) {
1147     aCodeName.Truncate();
1148     return;
1149   }
1150
1151   MOZ_RELEASE_ASSERT(
1152       static_cast<size_t>(aCodeNameIndex) < ArrayLength(kCodeNames),
1153       "Illegal physical code enumeration value");
1154   aCodeName = kCodeNames[aCodeNameIndex];
1155 }
1156
1157 /* static */
1158 KeyNameIndex WidgetKeyboardEvent::GetKeyNameIndex(const nsAString& aKeyValue) {
1159   if (!sKeyNameIndexHashtable) {
1160     sKeyNameIndexHashtable = new KeyNameIndexHashtable(ArrayLength(kKeyNames));
1161     for (size_t i = 0; i < ArrayLength(kKeyNames); i++) {
1162       sKeyNameIndexHashtable->Put(nsDependentString(kKeyNames[i]),
1163                                   static_cast<KeyNameIndex>(i));
1164     }
1165   }
1166   KeyNameIndex result = KEY_NAME_INDEX_USE_STRING;
1167   sKeyNameIndexHashtable->Get(aKeyValue, &result);
1168   return result;
1169 }
1170
1171 /* static */
1172 CodeNameIndex WidgetKeyboardEvent::GetCodeNameIndex(
1173     const nsAString& aCodeValue) {
1174   if (!sCodeNameIndexHashtable) {
1175     sCodeNameIndexHashtable =
1176         new CodeNameIndexHashtable(ArrayLength(kCodeNames));
1177     for (size_t i = 0; i < ArrayLength(kCodeNames); i++) {
1178       sCodeNameIndexHashtable->Put(nsDependentString(kCodeNames[i]),
1179                                    static_cast<CodeNameIndex>(i));
1180     }
1181   }
1182   CodeNameIndex result = CODE_NAME_INDEX_USE_STRING;
1183   sCodeNameIndexHashtable->Get(aCodeValue, &result);
1184   return result;
1185 }
1186
1187 /* static */
1188 uint32_t WidgetKeyboardEvent::GetFallbackKeyCodeOfPunctuationKey(
1189     CodeNameIndex aCodeNameIndex) {
1190   switch (aCodeNameIndex) {
1191     case CODE_NAME_INDEX_Semicolon:  // VK_OEM_1 on Windows
1192       return dom::KeyboardEvent_Binding::DOM_VK_SEMICOLON;
1193     case CODE_NAME_INDEX_Equal:  // VK_OEM_PLUS on Windows
1194       return dom::KeyboardEvent_Binding::DOM_VK_EQUALS;
1195     case CODE_NAME_INDEX_Comma:  // VK_OEM_COMMA on Windows
1196       return dom::KeyboardEvent_Binding::DOM_VK_COMMA;
1197     case CODE_NAME_INDEX_Minus:  // VK_OEM_MINUS on Windows
1198       return dom::KeyboardEvent_Binding::DOM_VK_HYPHEN_MINUS;
1199     case CODE_NAME_INDEX_Period:  // VK_OEM_PERIOD on Windows
1200       return dom::KeyboardEvent_Binding::DOM_VK_PERIOD;
1201     case CODE_NAME_INDEX_Slash:  // VK_OEM_2 on Windows
1202       return dom::KeyboardEvent_Binding::DOM_VK_SLASH;
1203     case CODE_NAME_INDEX_Backquote:  // VK_OEM_3 on Windows
1204       return dom::KeyboardEvent_Binding::DOM_VK_BACK_QUOTE;
1205     case CODE_NAME_INDEX_BracketLeft:  // VK_OEM_4 on Windows
1206       return dom::KeyboardEvent_Binding::DOM_VK_OPEN_BRACKET;
1207     case CODE_NAME_INDEX_Backslash:  // VK_OEM_5 on Windows
1208       return dom::KeyboardEvent_Binding::DOM_VK_BACK_SLASH;
1209     case CODE_NAME_INDEX_BracketRight:  // VK_OEM_6 on Windows
1210       return dom::KeyboardEvent_Binding::DOM_VK_CLOSE_BRACKET;
1211     case CODE_NAME_INDEX_Quote:  // VK_OEM_7 on Windows
1212       return dom::KeyboardEvent_Binding::DOM_VK_QUOTE;
1213     case CODE_NAME_INDEX_IntlBackslash:  // VK_OEM_5 on Windows (ABNT, etc)
1214     case CODE_NAME_INDEX_IntlYen:        // VK_OEM_5 on Windows (JIS)
1215     case CODE_NAME_INDEX_IntlRo:         // VK_OEM_102 on Windows
1216       return dom::KeyboardEvent_Binding::DOM_VK_BACK_SLASH;
1217     default:
1218       return 0;
1219   }
1220 }
1221
1222 /* static */ const char* WidgetKeyboardEvent::GetCommandStr(Command aCommand) {
1223 #define NS_DEFINE_COMMAND(aName, aCommandStr) , #aCommandStr
1224 #define NS_DEFINE_COMMAND_WITH_PARAM(aName, aCommandStr, aParam) , #aCommandStr
1225 #define NS_DEFINE_COMMAND_NO_EXEC_COMMAND(aName)
1226   static const char* const kCommands[] = {
1227       ""  // DoNothing
1228 #include "mozilla/CommandList.h"
1229   };
1230 #undef NS_DEFINE_COMMAND
1231 #undef NS_DEFINE_COMMAND_WITH_PARAM
1232 #undef NS_DEFINE_COMMAND_NO_EXEC_COMMAND
1233
1234   MOZ_RELEASE_ASSERT(static_cast<size_t>(aCommand) < ArrayLength(kCommands),
1235                      "Illegal command enumeration value");
1236   return kCommands[static_cast<CommandInt>(aCommand)];
1237 }
1238
1239 /* static */
1240 uint32_t WidgetKeyboardEvent::ComputeLocationFromCodeValue(
1241     CodeNameIndex aCodeNameIndex) {
1242   // Following commented out cases are not defined in PhysicalKeyCodeNameList.h
1243   // but are defined by D3E spec.  So, they should be uncommented when the
1244   // code values are defined in the header.
1245   switch (aCodeNameIndex) {
1246     case CODE_NAME_INDEX_AltLeft:
1247     case CODE_NAME_INDEX_ControlLeft:
1248     case CODE_NAME_INDEX_OSLeft:
1249     case CODE_NAME_INDEX_ShiftLeft:
1250       return eKeyLocationLeft;
1251     case CODE_NAME_INDEX_AltRight:
1252     case CODE_NAME_INDEX_ControlRight:
1253     case CODE_NAME_INDEX_OSRight:
1254     case CODE_NAME_INDEX_ShiftRight:
1255       return eKeyLocationRight;
1256     case CODE_NAME_INDEX_Numpad0:
1257     case CODE_NAME_INDEX_Numpad1:
1258     case CODE_NAME_INDEX_Numpad2:
1259     case CODE_NAME_INDEX_Numpad3:
1260     case CODE_NAME_INDEX_Numpad4:
1261     case CODE_NAME_INDEX_Numpad5:
1262     case CODE_NAME_INDEX_Numpad6:
1263     case CODE_NAME_INDEX_Numpad7:
1264     case CODE_NAME_INDEX_Numpad8:
1265     case CODE_NAME_INDEX_Numpad9:
1266     case CODE_NAME_INDEX_NumpadAdd:
1267     case CODE_NAME_INDEX_NumpadBackspace:
1268     case CODE_NAME_INDEX_NumpadClear:
1269     case CODE_NAME_INDEX_NumpadClearEntry:
1270     case CODE_NAME_INDEX_NumpadComma:
1271     case CODE_NAME_INDEX_NumpadDecimal:
1272     case CODE_NAME_INDEX_NumpadDivide:
1273     case CODE_NAME_INDEX_NumpadEnter:
1274     case CODE_NAME_INDEX_NumpadEqual:
1275     case CODE_NAME_INDEX_NumpadMemoryAdd:
1276     case CODE_NAME_INDEX_NumpadMemoryClear:
1277     case CODE_NAME_INDEX_NumpadMemoryRecall:
1278     case CODE_NAME_INDEX_NumpadMemoryStore:
1279     case CODE_NAME_INDEX_NumpadMemorySubtract:
1280     case CODE_NAME_INDEX_NumpadMultiply:
1281     case CODE_NAME_INDEX_NumpadParenLeft:
1282     case CODE_NAME_INDEX_NumpadParenRight:
1283     case CODE_NAME_INDEX_NumpadSubtract:
1284       return eKeyLocationNumpad;
1285     default:
1286       return eKeyLocationStandard;
1287   }
1288 }
1289
1290 /* static */
1291 uint32_t WidgetKeyboardEvent::ComputeKeyCodeFromKeyNameIndex(
1292     KeyNameIndex aKeyNameIndex) {
1293   switch (aKeyNameIndex) {
1294     case KEY_NAME_INDEX_Cancel:
1295       return dom::KeyboardEvent_Binding::DOM_VK_CANCEL;
1296     case KEY_NAME_INDEX_Help:
1297       return dom::KeyboardEvent_Binding::DOM_VK_HELP;
1298     case KEY_NAME_INDEX_Backspace:
1299       return dom::KeyboardEvent_Binding::DOM_VK_BACK_SPACE;
1300     case KEY_NAME_INDEX_Tab:
1301       return dom::KeyboardEvent_Binding::DOM_VK_TAB;
1302     case KEY_NAME_INDEX_Clear:
1303       return dom::KeyboardEvent_Binding::DOM_VK_CLEAR;
1304     case KEY_NAME_INDEX_Enter:
1305       return dom::KeyboardEvent_Binding::DOM_VK_RETURN;
1306     case KEY_NAME_INDEX_Shift:
1307       return dom::KeyboardEvent_Binding::DOM_VK_SHIFT;
1308     case KEY_NAME_INDEX_Control:
1309       return dom::KeyboardEvent_Binding::DOM_VK_CONTROL;
1310     case KEY_NAME_INDEX_Alt:
1311       return dom::KeyboardEvent_Binding::DOM_VK_ALT;
1312     case KEY_NAME_INDEX_Pause:
1313       return dom::KeyboardEvent_Binding::DOM_VK_PAUSE;
1314     case KEY_NAME_INDEX_CapsLock:
1315       return dom::KeyboardEvent_Binding::DOM_VK_CAPS_LOCK;
1316     case KEY_NAME_INDEX_Hiragana:
1317     case KEY_NAME_INDEX_Katakana:
1318     case KEY_NAME_INDEX_HiraganaKatakana:
1319     case KEY_NAME_INDEX_KanaMode:
1320       return dom::KeyboardEvent_Binding::DOM_VK_KANA;
1321     case KEY_NAME_INDEX_HangulMode:
1322       return dom::KeyboardEvent_Binding::DOM_VK_HANGUL;
1323     case KEY_NAME_INDEX_Eisu:
1324       return dom::KeyboardEvent_Binding::DOM_VK_EISU;
1325     case KEY_NAME_INDEX_JunjaMode:
1326       return dom::KeyboardEvent_Binding::DOM_VK_JUNJA;
1327     case KEY_NAME_INDEX_FinalMode:
1328       return dom::KeyboardEvent_Binding::DOM_VK_FINAL;
1329     case KEY_NAME_INDEX_HanjaMode:
1330       return dom::KeyboardEvent_Binding::DOM_VK_HANJA;
1331     case KEY_NAME_INDEX_KanjiMode:
1332       return dom::KeyboardEvent_Binding::DOM_VK_KANJI;
1333     case KEY_NAME_INDEX_Escape:
1334       return dom::KeyboardEvent_Binding::DOM_VK_ESCAPE;
1335     case KEY_NAME_INDEX_Convert:
1336       return dom::KeyboardEvent_Binding::DOM_VK_CONVERT;
1337     case KEY_NAME_INDEX_NonConvert:
1338       return dom::KeyboardEvent_Binding::DOM_VK_NONCONVERT;
1339     case KEY_NAME_INDEX_Accept:
1340       return dom::KeyboardEvent_Binding::DOM_VK_ACCEPT;
1341     case KEY_NAME_INDEX_ModeChange:
1342       return dom::KeyboardEvent_Binding::DOM_VK_MODECHANGE;
1343     case KEY_NAME_INDEX_PageUp:
1344       return dom::KeyboardEvent_Binding::DOM_VK_PAGE_UP;
1345     case KEY_NAME_INDEX_PageDown:
1346       return dom::KeyboardEvent_Binding::DOM_VK_PAGE_DOWN;
1347     case KEY_NAME_INDEX_End:
1348       return dom::KeyboardEvent_Binding::DOM_VK_END;
1349     case KEY_NAME_INDEX_Home:
1350       return dom::KeyboardEvent_Binding::DOM_VK_HOME;
1351     case KEY_NAME_INDEX_ArrowLeft:
1352       return dom::KeyboardEvent_Binding::DOM_VK_LEFT;
1353     case KEY_NAME_INDEX_ArrowUp:
1354       return dom::KeyboardEvent_Binding::DOM_VK_UP;
1355     case KEY_NAME_INDEX_ArrowRight:
1356       return dom::KeyboardEvent_Binding::DOM_VK_RIGHT;
1357     case KEY_NAME_INDEX_ArrowDown:
1358       return dom::KeyboardEvent_Binding::DOM_VK_DOWN;
1359     case KEY_NAME_INDEX_Select:
1360       return dom::KeyboardEvent_Binding::DOM_VK_SELECT;
1361     case KEY_NAME_INDEX_Print:
1362       return dom::KeyboardEvent_Binding::DOM_VK_PRINT;
1363     case KEY_NAME_INDEX_Execute:
1364       return dom::KeyboardEvent_Binding::DOM_VK_EXECUTE;
1365     case KEY_NAME_INDEX_PrintScreen:
1366       return dom::KeyboardEvent_Binding::DOM_VK_PRINTSCREEN;
1367     case KEY_NAME_INDEX_Insert:
1368       return dom::KeyboardEvent_Binding::DOM_VK_INSERT;
1369     case KEY_NAME_INDEX_Delete:
1370       return dom::KeyboardEvent_Binding::DOM_VK_DELETE;
1371     case KEY_NAME_INDEX_OS:
1372       // case KEY_NAME_INDEX_Super:
1373       // case KEY_NAME_INDEX_Hyper:
1374       return dom::KeyboardEvent_Binding::DOM_VK_WIN;
1375     case KEY_NAME_INDEX_ContextMenu:
1376       return dom::KeyboardEvent_Binding::DOM_VK_CONTEXT_MENU;
1377     case KEY_NAME_INDEX_Standby:
1378       return dom::KeyboardEvent_Binding::DOM_VK_SLEEP;
1379     case KEY_NAME_INDEX_F1:
1380       return dom::KeyboardEvent_Binding::DOM_VK_F1;
1381     case KEY_NAME_INDEX_F2:
1382       return dom::KeyboardEvent_Binding::DOM_VK_F2;
1383     case KEY_NAME_INDEX_F3:
1384       return dom::KeyboardEvent_Binding::DOM_VK_F3;
1385     case KEY_NAME_INDEX_F4:
1386       return dom::KeyboardEvent_Binding::DOM_VK_F4;
1387     case KEY_NAME_INDEX_F5:
1388       return dom::KeyboardEvent_Binding::DOM_VK_F5;
1389     case KEY_NAME_INDEX_F6:
1390       return dom::KeyboardEvent_Binding::DOM_VK_F6;
1391     case KEY_NAME_INDEX_F7:
1392       return dom::KeyboardEvent_Binding::DOM_VK_F7;
1393     case KEY_NAME_INDEX_F8:
1394       return dom::KeyboardEvent_Binding::DOM_VK_F8;
1395     case KEY_NAME_INDEX_F9:
1396       return dom::KeyboardEvent_Binding::DOM_VK_F9;
1397     case KEY_NAME_INDEX_F10:
1398       return dom::KeyboardEvent_Binding::DOM_VK_F10;
1399     case KEY_NAME_INDEX_F11:
1400       return dom::KeyboardEvent_Binding::DOM_VK_F11;
1401     case KEY_NAME_INDEX_F12:
1402       return dom::KeyboardEvent_Binding::DOM_VK_F12;
1403     case KEY_NAME_INDEX_F13:
1404       return dom::KeyboardEvent_Binding::DOM_VK_F13;
1405     case KEY_NAME_INDEX_F14:
1406       return dom::KeyboardEvent_Binding::DOM_VK_F14;
1407     case KEY_NAME_INDEX_F15:
1408       return dom::KeyboardEvent_Binding::DOM_VK_F15;
1409     case KEY_NAME_INDEX_F16:
1410       return dom::KeyboardEvent_Binding::DOM_VK_F16;
1411     case KEY_NAME_INDEX_F17:
1412       return dom::KeyboardEvent_Binding::DOM_VK_F17;
1413     case KEY_NAME_INDEX_F18:
1414       return dom::KeyboardEvent_Binding::DOM_VK_F18;
1415     case KEY_NAME_INDEX_F19:
1416       return dom::KeyboardEvent_Binding::DOM_VK_F19;
1417     case KEY_NAME_INDEX_F20:
1418       return dom::KeyboardEvent_Binding::DOM_VK_F20;
1419     case KEY_NAME_INDEX_F21:
1420       return dom::KeyboardEvent_Binding::DOM_VK_F21;
1421     case KEY_NAME_INDEX_F22:
1422       return dom::KeyboardEvent_Binding::DOM_VK_F22;
1423     case KEY_NAME_INDEX_F23:
1424       return dom::KeyboardEvent_Binding::DOM_VK_F23;
1425     case KEY_NAME_INDEX_F24:
1426       return dom::KeyboardEvent_Binding::DOM_VK_F24;
1427     case KEY_NAME_INDEX_NumLock:
1428       return dom::KeyboardEvent_Binding::DOM_VK_NUM_LOCK;
1429     case KEY_NAME_INDEX_ScrollLock:
1430       return dom::KeyboardEvent_Binding::DOM_VK_SCROLL_LOCK;
1431     case KEY_NAME_INDEX_AudioVolumeMute:
1432       return dom::KeyboardEvent_Binding::DOM_VK_VOLUME_MUTE;
1433     case KEY_NAME_INDEX_AudioVolumeDown:
1434       return dom::KeyboardEvent_Binding::DOM_VK_VOLUME_DOWN;
1435     case KEY_NAME_INDEX_AudioVolumeUp:
1436       return dom::KeyboardEvent_Binding::DOM_VK_VOLUME_UP;
1437     case KEY_NAME_INDEX_Meta:
1438       return dom::KeyboardEvent_Binding::DOM_VK_META;
1439     case KEY_NAME_INDEX_AltGraph:
1440       return dom::KeyboardEvent_Binding::DOM_VK_ALTGR;
1441     case KEY_NAME_INDEX_Process:
1442       return dom::KeyboardEvent_Binding::DOM_VK_PROCESSKEY;
1443     case KEY_NAME_INDEX_Attn:
1444       return dom::KeyboardEvent_Binding::DOM_VK_ATTN;
1445     case KEY_NAME_INDEX_CrSel:
1446       return dom::KeyboardEvent_Binding::DOM_VK_CRSEL;
1447     case KEY_NAME_INDEX_ExSel:
1448       return dom::KeyboardEvent_Binding::DOM_VK_EXSEL;
1449     case KEY_NAME_INDEX_EraseEof:
1450       return dom::KeyboardEvent_Binding::DOM_VK_EREOF;
1451     case KEY_NAME_INDEX_Play:
1452       return dom::KeyboardEvent_Binding::DOM_VK_PLAY;
1453     case KEY_NAME_INDEX_ZoomToggle:
1454     case KEY_NAME_INDEX_ZoomIn:
1455     case KEY_NAME_INDEX_ZoomOut:
1456       return dom::KeyboardEvent_Binding::DOM_VK_ZOOM;
1457     default:
1458       return 0;
1459   }
1460 }
1461
1462 /* static */
1463 CodeNameIndex WidgetKeyboardEvent::ComputeCodeNameIndexFromKeyNameIndex(
1464     KeyNameIndex aKeyNameIndex, const Maybe<uint32_t>& aLocation) {
1465   if (aLocation.isSome() &&
1466       aLocation.value() ==
1467           dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_NUMPAD) {
1468     // On macOS, NumLock is not supported.  Therefore, this handles
1469     // control key values except "Enter" only on non-macOS platforms.
1470     switch (aKeyNameIndex) {
1471 #ifndef XP_MACOSX
1472       case KEY_NAME_INDEX_Insert:
1473         return CODE_NAME_INDEX_Numpad0;
1474       case KEY_NAME_INDEX_End:
1475         return CODE_NAME_INDEX_Numpad1;
1476       case KEY_NAME_INDEX_ArrowDown:
1477         return CODE_NAME_INDEX_Numpad2;
1478       case KEY_NAME_INDEX_PageDown:
1479         return CODE_NAME_INDEX_Numpad3;
1480       case KEY_NAME_INDEX_ArrowLeft:
1481         return CODE_NAME_INDEX_Numpad4;
1482       case KEY_NAME_INDEX_Clear:
1483         // FYI: "Clear" on macOS should be DOM_KEY_LOCATION_STANDARD.
1484         return CODE_NAME_INDEX_Numpad5;
1485       case KEY_NAME_INDEX_ArrowRight:
1486         return CODE_NAME_INDEX_Numpad6;
1487       case KEY_NAME_INDEX_Home:
1488         return CODE_NAME_INDEX_Numpad7;
1489       case KEY_NAME_INDEX_ArrowUp:
1490         return CODE_NAME_INDEX_Numpad8;
1491       case KEY_NAME_INDEX_PageUp:
1492         return CODE_NAME_INDEX_Numpad9;
1493       case KEY_NAME_INDEX_Delete:
1494         return CODE_NAME_INDEX_NumpadDecimal;
1495 #endif  // #ifndef XP_MACOSX
1496       case KEY_NAME_INDEX_Enter:
1497         return CODE_NAME_INDEX_NumpadEnter;
1498       default:
1499         return CODE_NAME_INDEX_UNKNOWN;
1500     }
1501   }
1502
1503   if (WidgetKeyboardEvent::IsLeftOrRightModiferKeyNameIndex(aKeyNameIndex)) {
1504     if (aLocation.isSome() &&
1505         (aLocation.value() !=
1506              dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_LEFT &&
1507          aLocation.value() !=
1508              dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_RIGHT)) {
1509       return CODE_NAME_INDEX_UNKNOWN;
1510     }
1511     bool isRight =
1512         aLocation.isSome() &&
1513         aLocation.value() == dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_RIGHT;
1514     switch (aKeyNameIndex) {
1515       case KEY_NAME_INDEX_Alt:
1516         return isRight ? CODE_NAME_INDEX_AltRight : CODE_NAME_INDEX_AltLeft;
1517       case KEY_NAME_INDEX_Control:
1518         return isRight ? CODE_NAME_INDEX_ControlRight
1519                        : CODE_NAME_INDEX_ControlLeft;
1520       case KEY_NAME_INDEX_Shift:
1521         return isRight ? CODE_NAME_INDEX_ShiftRight : CODE_NAME_INDEX_ShiftLeft;
1522 #if defined(XP_WIN)
1523       case KEY_NAME_INDEX_Meta:
1524         return CODE_NAME_INDEX_UNKNOWN;
1525       case KEY_NAME_INDEX_OS:  // win key.
1526         return isRight ? CODE_NAME_INDEX_OSRight : CODE_NAME_INDEX_OSLeft;
1527 #elif defined(XP_MACOSX) || defined(ANDROID)
1528       case KEY_NAME_INDEX_Meta:  // command key.
1529         return isRight ? CODE_NAME_INDEX_OSRight : CODE_NAME_INDEX_OSLeft;
1530       case KEY_NAME_INDEX_OS:
1531         return CODE_NAME_INDEX_UNKNOWN;
1532 #else
1533       case KEY_NAME_INDEX_Meta:  // Alt + Shift.
1534         return isRight ? CODE_NAME_INDEX_AltRight : CODE_NAME_INDEX_AltLeft;
1535       case KEY_NAME_INDEX_OS:  // Super/Hyper key.
1536         return isRight ? CODE_NAME_INDEX_OSRight : CODE_NAME_INDEX_OSLeft;
1537 #endif
1538       default:
1539         return CODE_NAME_INDEX_UNKNOWN;
1540     }
1541   }
1542
1543   if (aLocation.isSome() &&
1544       aLocation.value() !=
1545           dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_STANDARD) {
1546     return CODE_NAME_INDEX_UNKNOWN;
1547   }
1548
1549   switch (aKeyNameIndex) {
1550     // Standard section:
1551     case KEY_NAME_INDEX_Escape:
1552       return CODE_NAME_INDEX_Escape;
1553     case KEY_NAME_INDEX_Tab:
1554       return CODE_NAME_INDEX_Tab;
1555     case KEY_NAME_INDEX_CapsLock:
1556       return CODE_NAME_INDEX_CapsLock;
1557     case KEY_NAME_INDEX_ContextMenu:
1558       return CODE_NAME_INDEX_ContextMenu;
1559     case KEY_NAME_INDEX_Backspace:
1560       return CODE_NAME_INDEX_Backspace;
1561     case KEY_NAME_INDEX_Enter:
1562       return CODE_NAME_INDEX_Enter;
1563 #ifdef XP_MACOSX
1564     // Although, macOS does not fire native key event of "Fn" key, we support
1565     // Fn key event if it's sent by other apps directly.
1566     case KEY_NAME_INDEX_Fn:
1567       return CODE_NAME_INDEX_Fn;
1568 #endif  // #ifdef
1569
1570     // Arrow Pad section:
1571     case KEY_NAME_INDEX_ArrowLeft:
1572       return CODE_NAME_INDEX_ArrowLeft;
1573     case KEY_NAME_INDEX_ArrowUp:
1574       return CODE_NAME_INDEX_ArrowUp;
1575     case KEY_NAME_INDEX_ArrowDown:
1576       return CODE_NAME_INDEX_ArrowDown;
1577     case KEY_NAME_INDEX_ArrowRight:
1578       return CODE_NAME_INDEX_ArrowRight;
1579
1580       // Control Pad section:
1581 #ifndef XP_MACOSX
1582     case KEY_NAME_INDEX_Insert:
1583       return CODE_NAME_INDEX_Insert;
1584 #else
1585     case KEY_NAME_INDEX_Help:
1586       return CODE_NAME_INDEX_Help;
1587 #endif  // #ifndef XP_MACOSX #else
1588     case KEY_NAME_INDEX_Delete:
1589       return CODE_NAME_INDEX_Delete;
1590     case KEY_NAME_INDEX_Home:
1591       return CODE_NAME_INDEX_Home;
1592     case KEY_NAME_INDEX_End:
1593       return CODE_NAME_INDEX_End;
1594     case KEY_NAME_INDEX_PageUp:
1595       return CODE_NAME_INDEX_PageUp;
1596     case KEY_NAME_INDEX_PageDown:
1597       return CODE_NAME_INDEX_PageDown;
1598
1599     // Function keys:
1600     case KEY_NAME_INDEX_F1:
1601       return CODE_NAME_INDEX_F1;
1602     case KEY_NAME_INDEX_F2:
1603       return CODE_NAME_INDEX_F2;
1604     case KEY_NAME_INDEX_F3:
1605       return CODE_NAME_INDEX_F3;
1606     case KEY_NAME_INDEX_F4:
1607       return CODE_NAME_INDEX_F4;
1608     case KEY_NAME_INDEX_F5:
1609       return CODE_NAME_INDEX_F5;
1610     case KEY_NAME_INDEX_F6:
1611       return CODE_NAME_INDEX_F6;
1612     case KEY_NAME_INDEX_F7:
1613       return CODE_NAME_INDEX_F7;
1614     case KEY_NAME_INDEX_F8:
1615       return CODE_NAME_INDEX_F8;
1616     case KEY_NAME_INDEX_F9:
1617       return CODE_NAME_INDEX_F9;
1618     case KEY_NAME_INDEX_F10:
1619       return CODE_NAME_INDEX_F10;
1620     case KEY_NAME_INDEX_F11:
1621       return CODE_NAME_INDEX_F11;
1622     case KEY_NAME_INDEX_F12:
1623       return CODE_NAME_INDEX_F12;
1624     case KEY_NAME_INDEX_F13:
1625       return CODE_NAME_INDEX_F13;
1626     case KEY_NAME_INDEX_F14:
1627       return CODE_NAME_INDEX_F14;
1628     case KEY_NAME_INDEX_F15:
1629       return CODE_NAME_INDEX_F15;
1630     case KEY_NAME_INDEX_F16:
1631       return CODE_NAME_INDEX_F16;
1632     case KEY_NAME_INDEX_F17:
1633       return CODE_NAME_INDEX_F17;
1634     case KEY_NAME_INDEX_F18:
1635       return CODE_NAME_INDEX_F18;
1636     case KEY_NAME_INDEX_F19:
1637       return CODE_NAME_INDEX_F19;
1638     case KEY_NAME_INDEX_F20:
1639       return CODE_NAME_INDEX_F20;
1640 #ifndef XP_MACOSX
1641     case KEY_NAME_INDEX_F21:
1642       return CODE_NAME_INDEX_F21;
1643     case KEY_NAME_INDEX_F22:
1644       return CODE_NAME_INDEX_F22;
1645     case KEY_NAME_INDEX_F23:
1646       return CODE_NAME_INDEX_F23;
1647     case KEY_NAME_INDEX_F24:
1648       return CODE_NAME_INDEX_F24;
1649     case KEY_NAME_INDEX_Pause:
1650       return CODE_NAME_INDEX_Pause;
1651     case KEY_NAME_INDEX_PrintScreen:
1652       return CODE_NAME_INDEX_PrintScreen;
1653     case KEY_NAME_INDEX_ScrollLock:
1654       return CODE_NAME_INDEX_ScrollLock;
1655 #endif  // #ifndef XP_MACOSX
1656
1657       // NumLock key:
1658 #ifndef XP_MACOSX
1659     case KEY_NAME_INDEX_NumLock:
1660       return CODE_NAME_INDEX_NumLock;
1661 #else
1662     case KEY_NAME_INDEX_Clear:
1663       return CODE_NAME_INDEX_NumLock;
1664 #endif  // #ifndef XP_MACOSX #else
1665
1666     // Media keys:
1667     case KEY_NAME_INDEX_AudioVolumeDown:
1668       return CODE_NAME_INDEX_VolumeDown;
1669     case KEY_NAME_INDEX_AudioVolumeMute:
1670       return CODE_NAME_INDEX_VolumeMute;
1671     case KEY_NAME_INDEX_AudioVolumeUp:
1672       return CODE_NAME_INDEX_VolumeUp;
1673 #ifndef XP_MACOSX
1674     case KEY_NAME_INDEX_BrowserBack:
1675       return CODE_NAME_INDEX_BrowserBack;
1676     case KEY_NAME_INDEX_BrowserFavorites:
1677       return CODE_NAME_INDEX_BrowserFavorites;
1678     case KEY_NAME_INDEX_BrowserForward:
1679       return CODE_NAME_INDEX_BrowserForward;
1680     case KEY_NAME_INDEX_BrowserRefresh:
1681       return CODE_NAME_INDEX_BrowserRefresh;
1682     case KEY_NAME_INDEX_BrowserSearch:
1683       return CODE_NAME_INDEX_BrowserSearch;
1684     case KEY_NAME_INDEX_BrowserStop:
1685       return CODE_NAME_INDEX_BrowserStop;
1686     case KEY_NAME_INDEX_MediaPlayPause:
1687       return CODE_NAME_INDEX_MediaPlayPause;
1688     case KEY_NAME_INDEX_MediaStop:
1689       return CODE_NAME_INDEX_MediaStop;
1690     case KEY_NAME_INDEX_MediaTrackNext:
1691       return CODE_NAME_INDEX_MediaTrackNext;
1692     case KEY_NAME_INDEX_MediaTrackPrevious:
1693       return CODE_NAME_INDEX_MediaTrackPrevious;
1694     case KEY_NAME_INDEX_LaunchApplication1:
1695       return CODE_NAME_INDEX_LaunchApp1;
1696 #endif  // #ifndef XP_MACOSX
1697
1698       // Only Windows and GTK supports the following multimedia keys.
1699 #if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
1700     case KEY_NAME_INDEX_BrowserHome:
1701       return CODE_NAME_INDEX_BrowserHome;
1702     case KEY_NAME_INDEX_LaunchApplication2:
1703       return CODE_NAME_INDEX_LaunchApp2;
1704 #endif  // #if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
1705
1706       // Only GTK and Android supports the following multimedia keys.
1707 #if defined(MOZ_WIDGET_GTK) || defined(ANDROID)
1708     case KEY_NAME_INDEX_Eject:
1709       return CODE_NAME_INDEX_Eject;
1710     case KEY_NAME_INDEX_WakeUp:
1711       return CODE_NAME_INDEX_WakeUp;
1712 #endif  // #if defined(MOZ_WIDGET_GTK) || defined(ANDROID)
1713
1714       // Only Windows does not support Help key (and macOS handled above).
1715 #if !defined(XP_WIN) && !defined(XP_MACOSX)
1716     case KEY_NAME_INDEX_Help:
1717       return CODE_NAME_INDEX_Help;
1718 #endif  // #if !defined(XP_WIN) && !defined(XP_MACOSX)
1719
1720       // IME specific keys:
1721 #ifdef XP_WIN
1722     case KEY_NAME_INDEX_Convert:
1723       return CODE_NAME_INDEX_Convert;
1724     case KEY_NAME_INDEX_NonConvert:
1725       return CODE_NAME_INDEX_NonConvert;
1726     case KEY_NAME_INDEX_Alphanumeric:
1727       return CODE_NAME_INDEX_CapsLock;
1728     case KEY_NAME_INDEX_KanaMode:
1729     case KEY_NAME_INDEX_Romaji:
1730     case KEY_NAME_INDEX_Katakana:
1731     case KEY_NAME_INDEX_Hiragana:
1732       return CODE_NAME_INDEX_KanaMode;
1733     case KEY_NAME_INDEX_Hankaku:
1734     case KEY_NAME_INDEX_Zenkaku:
1735     case KEY_NAME_INDEX_KanjiMode:
1736       return CODE_NAME_INDEX_Backquote;
1737     case KEY_NAME_INDEX_HanjaMode:
1738       return CODE_NAME_INDEX_Lang2;
1739     case KEY_NAME_INDEX_HangulMode:
1740       return CODE_NAME_INDEX_Lang1;
1741 #endif  // #ifdef XP_WIN
1742
1743 #ifdef MOZ_WIDGET_GTK
1744     case KEY_NAME_INDEX_Convert:
1745       return CODE_NAME_INDEX_Convert;
1746     case KEY_NAME_INDEX_NonConvert:
1747       return CODE_NAME_INDEX_NonConvert;
1748     case KEY_NAME_INDEX_Alphanumeric:
1749       return CODE_NAME_INDEX_CapsLock;
1750     case KEY_NAME_INDEX_HiraganaKatakana:
1751       return CODE_NAME_INDEX_KanaMode;
1752     case KEY_NAME_INDEX_ZenkakuHankaku:
1753       return CODE_NAME_INDEX_Backquote;
1754 #endif  // #ifdef MOZ_WIDGET_GTK
1755
1756 #ifdef ANDROID
1757     case KEY_NAME_INDEX_Convert:
1758       return CODE_NAME_INDEX_Convert;
1759     case KEY_NAME_INDEX_NonConvert:
1760       return CODE_NAME_INDEX_NonConvert;
1761     case KEY_NAME_INDEX_HiraganaKatakana:
1762       return CODE_NAME_INDEX_KanaMode;
1763     case KEY_NAME_INDEX_ZenkakuHankaku:
1764       return CODE_NAME_INDEX_Backquote;
1765     case KEY_NAME_INDEX_Eisu:
1766       return CODE_NAME_INDEX_Lang2;
1767     case KEY_NAME_INDEX_KanjiMode:
1768       return CODE_NAME_INDEX_Lang1;
1769 #endif  // #ifdef ANDROID
1770
1771 #ifdef XP_MACOSX
1772     case KEY_NAME_INDEX_Eisu:
1773       return CODE_NAME_INDEX_Lang2;
1774     case KEY_NAME_INDEX_KanjiMode:
1775       return CODE_NAME_INDEX_Lang1;
1776 #endif  // #ifdef XP_MACOSX
1777
1778     default:
1779       return CODE_NAME_INDEX_UNKNOWN;
1780   }
1781 }
1782
1783 /* static */
1784 Modifier WidgetKeyboardEvent::GetModifierForKeyName(
1785     KeyNameIndex aKeyNameIndex) {
1786   switch (aKeyNameIndex) {
1787     case KEY_NAME_INDEX_Alt:
1788       return MODIFIER_ALT;
1789     case KEY_NAME_INDEX_AltGraph:
1790       return MODIFIER_ALTGRAPH;
1791     case KEY_NAME_INDEX_CapsLock:
1792       return MODIFIER_CAPSLOCK;
1793     case KEY_NAME_INDEX_Control:
1794       return MODIFIER_CONTROL;
1795     case KEY_NAME_INDEX_Fn:
1796       return MODIFIER_FN;
1797     case KEY_NAME_INDEX_FnLock:
1798       return MODIFIER_FNLOCK;
1799     // case KEY_NAME_INDEX_Hyper:
1800     case KEY_NAME_INDEX_Meta:
1801       return MODIFIER_META;
1802     case KEY_NAME_INDEX_NumLock:
1803       return MODIFIER_NUMLOCK;
1804     case KEY_NAME_INDEX_OS:
1805       return MODIFIER_OS;
1806     case KEY_NAME_INDEX_ScrollLock:
1807       return MODIFIER_SCROLLLOCK;
1808     case KEY_NAME_INDEX_Shift:
1809       return MODIFIER_SHIFT;
1810     // case KEY_NAME_INDEX_Super:
1811     case KEY_NAME_INDEX_Symbol:
1812       return MODIFIER_SYMBOL;
1813     case KEY_NAME_INDEX_SymbolLock:
1814       return MODIFIER_SYMBOLLOCK;
1815     default:
1816       return MODIFIER_NONE;
1817   }
1818 }
1819
1820 /* static */
1821 bool WidgetKeyboardEvent::IsLockableModifier(KeyNameIndex aKeyNameIndex) {
1822   switch (aKeyNameIndex) {
1823     case KEY_NAME_INDEX_CapsLock:
1824     case KEY_NAME_INDEX_FnLock:
1825     case KEY_NAME_INDEX_NumLock:
1826     case KEY_NAME_INDEX_ScrollLock:
1827     case KEY_NAME_INDEX_SymbolLock:
1828       return true;
1829     default:
1830       return false;
1831   }
1832 }
1833
1834 /******************************************************************************
1835  * mozilla::InternalEditorInputEvent (TextEvents.h)
1836  ******************************************************************************/
1837
1838 #define NS_DEFINE_INPUTTYPE(aCPPName, aDOMName) (u"" aDOMName),
1839 const char16_t* const InternalEditorInputEvent::kInputTypeNames[] = {
1840 #include "mozilla/InputTypeList.h"
1841 };
1842 #undef NS_DEFINE_INPUTTYPE
1843
1844 InternalEditorInputEvent::InputTypeHashtable*
1845     InternalEditorInputEvent::sInputTypeHashtable = nullptr;
1846
1847 /* static */
1848 void InternalEditorInputEvent::Shutdown() {
1849   delete sInputTypeHashtable;
1850   sInputTypeHashtable = nullptr;
1851 }
1852
1853 /* static */
1854 void InternalEditorInputEvent::GetDOMInputTypeName(EditorInputType aInputType,
1855                                                    nsAString& aInputTypeName) {
1856   if (static_cast<size_t>(aInputType) >=
1857       static_cast<size_t>(EditorInputType::eUnknown)) {
1858     aInputTypeName.Truncate();
1859     return;
1860   }
1861
1862   MOZ_RELEASE_ASSERT(
1863       static_cast<size_t>(aInputType) < ArrayLength(kInputTypeNames),
1864       "Illegal input type enumeration value");
1865   aInputTypeName.Assign(kInputTypeNames[static_cast<size_t>(aInputType)]);
1866 }
1867
1868 /* static */
1869 EditorInputType InternalEditorInputEvent::GetEditorInputType(
1870     const nsAString& aInputType) {
1871   if (aInputType.IsEmpty()) {
1872     return EditorInputType::eUnknown;
1873   }
1874
1875   if (!sInputTypeHashtable) {
1876     sInputTypeHashtable = new InputTypeHashtable(ArrayLength(kInputTypeNames));
1877     for (size_t i = 0; i < ArrayLength(kInputTypeNames); i++) {
1878       sInputTypeHashtable->Put(nsDependentString(kInputTypeNames[i]),
1879                                static_cast<EditorInputType>(i));
1880     }
1881   }
1882   EditorInputType result = EditorInputType::eUnknown;
1883   sInputTypeHashtable->Get(aInputType, &result);
1884   return result;
1885 }
1886
1887 }  // namespace mozilla