Source/WebCore/platform/ios/PlatformEventFactoryIOS.mm - WebKit - Git at Google

 /*
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2014 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 #import "config.h"
 #import "PlatformEventFactoryIOS.h"

 #if PLATFORM(IOS)

 #import "IntPoint.h"
 #import "KeyEventCocoa.h"
 #import "Logging.h"
 #import "WAKAppKitStubs.h"
 #import "WebEvent.h"
 #import "WindowsKeyboardCodes.h"
 #import <wtf/WallTime.h>

 namespace WebCore {

 static OptionSet<PlatformEvent::Modifier> modifiersForEvent(WebEvent *event)
 {
     OptionSet<PlatformEvent::Modifier> modifiers;

     if (event.modifierFlags & WebEventFlagMaskShift)
         modifiers |= PlatformEvent::Modifier::ShiftKey;
     if (event.modifierFlags & WebEventFlagMaskControl)
         modifiers |= PlatformEvent::Modifier::CtrlKey;
     if (event.modifierFlags & WebEventFlagMaskAlternate)
         modifiers |= PlatformEvent::Modifier::AltKey;
     if (event.modifierFlags & WebEventFlagMaskCommand)
         modifiers |= PlatformEvent::Modifier::MetaKey;
     if (event.modifierFlags & WebEventFlagMaskAlphaShift)
         modifiers |= PlatformEvent::Modifier::CapsLockKey;

     return modifiers;
 }

 static inline IntPoint pointForEvent(WebEvent *event)
 {
     return IntPoint(event.locationInWindow);
 }

 static inline IntPoint globalPointForEvent(WebEvent *event)
 {
     // iOS WebKit works as if it is full screen. Therefore Web coords are Global coords.
     return pointForEvent(event);
 }

 static PlatformEvent::Type mouseEventType(WebEvent *event)
 {
     switch (event.type) {
     case WebEventMouseDown:
         return PlatformEvent::MousePressed;
     case WebEventMouseUp:
         return PlatformEvent::MouseReleased;
     case WebEventMouseMoved:
         return PlatformEvent::MouseMoved;
     default:
         ASSERT_NOT_REACHED();
         return PlatformEvent::MousePressed;
     }
 }

 class PlatformMouseEventBuilder : public PlatformMouseEvent {
 public:
     PlatformMouseEventBuilder(WebEvent *event)
     {
         m_type = mouseEventType(event);
         m_timestamp = WallTime::now();

         m_position = pointForEvent(event);
         m_globalPosition = globalPointForEvent(event);
         m_button = LeftButton; // This has always been the LeftButton on iOS.
         m_clickCount = 1; // This has always been 1 on iOS.
     }
 };

 PlatformMouseEvent PlatformEventFactory::createPlatformMouseEvent(WebEvent *event)
 {
     return PlatformMouseEventBuilder(event);
 }

 class PlatformWheelEventBuilder : public PlatformWheelEvent {
 public:
     PlatformWheelEventBuilder(WebEvent *event)
     {
         ASSERT(event.type == WebEventScrollWheel);

         m_type = PlatformEvent::Wheel;
         m_timestamp = WallTime::now();

         m_position = pointForEvent(event);
         m_globalPosition = globalPointForEvent(event);
         m_deltaX = event.deltaX;
         m_deltaY = event.deltaY;
         m_granularity = ScrollByPixelWheelEvent; // iOS only supports continuous (pixel-mode) scrolling.
     }
 };

 PlatformWheelEvent PlatformEventFactory::createPlatformWheelEvent(WebEvent *event)
 {
     return PlatformWheelEventBuilder(event);
 }

 String keyIdentifierForKeyEvent(WebEvent *event)
 {
     NSString *s = event.charactersIgnoringModifiers;
     if ([s length] != 1) {
         LOG(Events, "received an unexpected number of characters in key event: %u", [s length]);
         return "Unidentified";
     }

     return keyIdentifierForCharCode(CFStringGetCharacterAtIndex((CFStringRef)s, 0));
 }

 String keyForKeyEvent(WebEvent *event)
 {
     NSString *characters = event.characters;
     auto length = [characters length];

     // characters return an empty string for dead keys.
     // https://developer.apple.com/reference/appkit/nsevent/1534183-characters
     // "Dead" is defined here https://w3c.github.io/uievents-key/#keys-composition.
     if (!length)
         return ASCIILiteral("Dead");

     if (length > 1)
         return characters;

     return keyForCharCode([characters characterAtIndex:0]);
 }

 // https://w3c.github.io/uievents-code/
 String codeForKeyEvent(WebEvent *event)
 {
     switch (event.keyCode) {
     // Keys in the alphanumeric section.
     case VK_OEM_3: return ASCIILiteral("Backquote");
     case VK_OEM_5: return ASCIILiteral("Backslash");
     case VK_BACK: return ASCIILiteral("Backspace");
     case VK_OEM_4: return ASCIILiteral("BracketLeft");
     case VK_OEM_6: return ASCIILiteral("BracketRight");
     case VK_OEM_COMMA: return ASCIILiteral("Comma");
     case VK_0: return ASCIILiteral("Digit0");
     case VK_1: return ASCIILiteral("Digit1");
     case VK_2: return ASCIILiteral("Digit2");
     case VK_3: return ASCIILiteral("Digit3");
     case VK_4: return ASCIILiteral("Digit4");
     case VK_5: return ASCIILiteral("Digit5");
     case VK_6: return ASCIILiteral("Digit6");
     case VK_7: return ASCIILiteral("Digit7");
     case VK_8: return ASCIILiteral("Digit8");
     case VK_9: return ASCIILiteral("Digit9");
     case VK_OEM_PLUS: return ASCIILiteral("Equal");
     case VK_OEM_102: return ASCIILiteral("IntlBackslash");
     // IntlRo.
     // IntlYen.
     case VK_A: return ASCIILiteral("KeyA");
     case VK_B: return ASCIILiteral("KeyB");
     case VK_C: return ASCIILiteral("KeyC");
     case VK_D: return ASCIILiteral("KeyD");
     case VK_E: return ASCIILiteral("KeyE");
     case VK_F: return ASCIILiteral("KeyF");
     case VK_G: return ASCIILiteral("KeyG");
     case VK_H: return ASCIILiteral("KeyH");
     case VK_I: return ASCIILiteral("KeyI");
     case VK_J: return ASCIILiteral("KeyJ");
     case VK_K: return ASCIILiteral("KeyK");
     case VK_L: return ASCIILiteral("KeyL");
     case VK_M: return ASCIILiteral("KeyM");
     case VK_N: return ASCIILiteral("KeyN");
     case VK_O: return ASCIILiteral("KeyO");
     case VK_P: return ASCIILiteral("KeyP");
     case VK_Q: return ASCIILiteral("KeyQ");
     case VK_R: return ASCIILiteral("KeyR");
     case VK_S: return ASCIILiteral("KeyS");
     case VK_T: return ASCIILiteral("KeyT");
     case VK_U: return ASCIILiteral("KeyU");
     case VK_V: return ASCIILiteral("KeyV");
     case VK_W: return ASCIILiteral("KeyW");
     case VK_X: return ASCIILiteral("KeyX");
     case VK_Y: return ASCIILiteral("KeyY");
     case VK_Z: return ASCIILiteral("KeyZ");
     case VK_OEM_MINUS: return ASCIILiteral("Minus");
     case VK_OEM_PERIOD: return ASCIILiteral("Period");
     case VK_OEM_7: return ASCIILiteral("Quote");
     case VK_OEM_1: return ASCIILiteral("Semicolon");
     case VK_OEM_2: return ASCIILiteral("Slash");

     // Functional keys in alphanumeric section.
     case VK_MENU: return ASCIILiteral("AltLeft");
     // AltRight.
     case VK_CAPITAL: return ASCIILiteral("CapsLock");
     // ContextMenu.
     case VK_LCONTROL: return ASCIILiteral("ControlLeft");
     case VK_RCONTROL: return ASCIILiteral("ControlRight");
     case VK_RETURN: return ASCIILiteral("Enter"); //  Labeled Return on Apple keyboards.
     case VK_LWIN: return ASCIILiteral("MetaLeft");
     case VK_RWIN: return ASCIILiteral("MetaRight");
     case VK_LSHIFT: return ASCIILiteral("ShiftLeft");
     case VK_RSHIFT: return ASCIILiteral("ShiftRight");
     case VK_SPACE: return ASCIILiteral("Space");
     case VK_TAB: return ASCIILiteral("Tab");

     // Functional keys found on Japanese and Korean keyboards.
     // Convert.
     case VK_KANA: return ASCIILiteral("KanaMode");
     // Lang1.
     // Lang2.
     // Lang3.
     // Lang4.
     // Lang5.
     // NonConvert.

     // Keys in the ControlPad section.
     // Delete
     case VK_END: return ASCIILiteral("End");
     case VK_HELP: return ASCIILiteral("Help");
     case VK_HOME: return ASCIILiteral("Home");
     // Insert: Not present on Apple keyboards.
     case VK_NEXT: return ASCIILiteral("PageDown");
     case VK_PRIOR: return ASCIILiteral("PageUp");

     // Keys in the ArrowPad section.
     case VK_DOWN: return ASCIILiteral("ArrowDown");
     case VK_LEFT: return ASCIILiteral("ArrowLeft");
     case VK_RIGHT: return ASCIILiteral("ArrowRight");
     case VK_UP: return ASCIILiteral("ArrowUp");

     // Keys in the Numpad section.
     case VK_NUMLOCK: return ASCIILiteral("NumLock");
     case VK_NUMPAD0: return ASCIILiteral("Numpad0");
     case VK_NUMPAD1: return ASCIILiteral("Numpad1");
     case VK_NUMPAD2: return ASCIILiteral("Numpad2");
     case VK_NUMPAD3: return ASCIILiteral("Numpad3");
     case VK_NUMPAD4: return ASCIILiteral("Numpad4");
     case VK_NUMPAD5: return ASCIILiteral("Numpad5");
     case VK_NUMPAD6: return ASCIILiteral("Numpad6");
     case VK_NUMPAD7: return ASCIILiteral("Numpad7");
     case VK_NUMPAD8: return ASCIILiteral("Numpad8");
     case VK_NUMPAD9: return ASCIILiteral("Numpad9");
     case VK_ADD: return ASCIILiteral("NumpadAdd");
     // NumpadBackspace.
     // NumpadClear.
     // NumpadClearEntry.
     case VK_SEPARATOR: return ASCIILiteral("NumpadComma");
     case VK_DECIMAL: return ASCIILiteral("NumpadDecimal");
     case VK_DIVIDE: return ASCIILiteral("NumpadDivide");
     // NumpadEnter.
     case VK_CLEAR: return ASCIILiteral("NumpadEqual");
     // NumpadHash.
     // NumpadMemoryAdd.
     // NumpadMemoryClear.
     // NumpadMemoryRecall.
     // NumpadMemoryStore.
     // NumpadMemorySubtract.
     case VK_MULTIPLY: return ASCIILiteral("NumpadMultiply");
     // NumpadParenLeft.
     // NumpadParenRight.
     // NumpadStar: The specification says to use "NumpadMultiply" for the * key on numeric keypads.
     case VK_SUBTRACT: return ASCIILiteral("NumpadSubtract");

     // Keys in the Function section.
     case VK_ESCAPE: return ASCIILiteral("Escape");
     case VK_F1: return ASCIILiteral("F1");
     case VK_F2: return ASCIILiteral("F2");
     case VK_F3: return ASCIILiteral("F3");
     case VK_F4: return ASCIILiteral("F4");
     case VK_F5: return ASCIILiteral("F5");
     case VK_F6: return ASCIILiteral("F6");
     case VK_F7: return ASCIILiteral("F7");
     case VK_F8: return ASCIILiteral("F8");
     case VK_F9: return ASCIILiteral("F9");
     case VK_F10: return ASCIILiteral("F10");
     case VK_F11: return ASCIILiteral("F11");
     case VK_F12: return ASCIILiteral("F12");
     case VK_F13: return ASCIILiteral("F13");
     case VK_F14: return ASCIILiteral("F14");
     case VK_F15: return ASCIILiteral("F15");
     case VK_F16: return ASCIILiteral("F16");
     case VK_F17: return ASCIILiteral("F17");
     case VK_F18: return ASCIILiteral("F18");
     case VK_F19: return ASCIILiteral("F19");
     case VK_F20: return ASCIILiteral("F20");
     // Fn: This is typically a hardware key that does not generate a separate code.
     // FnLock.
     // PrintScreen.
     // ScrollLock.
     // Pause.

     // Media keys.
     // BrowserBack.
     // BrowserFavorites.
     // BrowserForward.
     // BrowserHome.
     // BrowserRefresh.
     // BrowserSearch.
     // BrowserStop.
     // Eject.
     // LaunchApp1.
     // LaunchApp2.
     // LaunchMail.
     // MediaPlayPause.
     // MediaSelect.
     // MediaStop.
     // MediaTrackNext.
     // MediaTrackPrevious.
     // Power.
     // Sleep.
     case VK_VOLUME_DOWN: return ASCIILiteral("AudioVolumeDown");
     case VK_VOLUME_MUTE: return ASCIILiteral("AudioVolumeMute");
     case VK_VOLUME_UP: return ASCIILiteral("AudioVolumeUp");
     // WakeUp.

     // Legacy modifier keys.
     // Hyper.
     // Super.
     // Turbo.

     // Legacy process control keys.
     // Abort.
     // Resume.
     // Suspend.

     // Legacy editing keys.
     // Again.
     // Copy.
     // Cut.
     // Find.
     // Open.
     // Paste.
     // Props.
     // Select.
     // Undo.

     // Keys found on international keyboards.
     // Hiragana.
     // Katakana.

     default:
         return ASCIILiteral("Unidentified");
     }
 }

 class PlatformKeyboardEventBuilder : public PlatformKeyboardEvent {
 public:
     PlatformKeyboardEventBuilder(WebEvent *event)
     {
         ASSERT(event.type == WebEventKeyDown || event.type == WebEventKeyUp);

         m_type = (event.type == WebEventKeyUp ? PlatformEvent::KeyUp : PlatformEvent::KeyDown);
         m_modifiers = modifiersForEvent(event);
         m_timestamp = WallTime::now();

         m_text = event.characters;
         m_unmodifiedText = event.charactersIgnoringModifiers;
         m_key = keyForKeyEvent(event);
         m_code = codeForKeyEvent(event);
         m_keyIdentifier = keyIdentifierForKeyEvent(event);
         m_windowsVirtualKeyCode = event.keyCode;
         m_autoRepeat = event.isKeyRepeating;
         m_isKeypad = false; // iOS does not distinguish the numpad. See <rdar://problem/7190835>.
         m_isSystemKey = false;
         m_Event = event;

         // Always use 13 for Enter/Return -- we don't want to use AppKit's different character for Enter.
         if (m_windowsVirtualKeyCode == '\r') {
             m_text = "\r";
             m_unmodifiedText = "\r";
         }

         // The adjustments below are only needed in backward compatibility mode, but we cannot tell what mode we are in from here.

         // Turn 0x7F into 8, because backspace needs to always be 8.
         if (m_text == "\x7F")
             m_text = "\x8";
         if (m_unmodifiedText == "\x7F")
             m_unmodifiedText = "\x8";
         // Always use 9 for tab -- we don't want to use AppKit's different character for shift-tab.
         if (m_windowsVirtualKeyCode == 9) {
             m_text = "\x9";
             m_unmodifiedText = "\x9";
         }
     }
 };

 PlatformKeyboardEvent PlatformEventFactory::createPlatformKeyboardEvent(WebEvent *event)
 {
     return PlatformKeyboardEventBuilder(event);
 }

 #if ENABLE(TOUCH_EVENTS)
 static PlatformTouchPoint::TouchPhaseType convertTouchPhase(NSNumber *touchPhaseNumber)
 {
     WebEventTouchPhaseType touchPhase = static_cast<WebEventTouchPhaseType>([touchPhaseNumber unsignedIntValue]);
     switch (touchPhase) {
     case WebEventTouchPhaseBegan:
         return PlatformTouchPoint::TouchPhaseBegan;
     case WebEventTouchPhaseMoved:
         return PlatformTouchPoint::TouchPhaseMoved;
     case WebEventTouchPhaseStationary:
         return PlatformTouchPoint::TouchPhaseStationary;
     case WebEventTouchPhaseEnded:
         return PlatformTouchPoint::TouchPhaseEnded;
     case WebEventTouchPhaseCancelled:
         return PlatformTouchPoint::TouchPhaseCancelled;
     default:
         ASSERT_NOT_REACHED();
     }
     return PlatformTouchPoint::TouchPhaseBegan;
 }

 static PlatformEvent::Type touchEventType(WebEvent *event)
 {
     switch (event.type) {
     case WebEventTouchBegin:
         return PlatformEvent::TouchStart;
     case WebEventTouchEnd:
         return PlatformEvent::TouchEnd;
     case WebEventTouchCancel:
         return PlatformEvent::TouchCancel;
     case WebEventTouchChange:
         return PlatformEvent::TouchMove;
     default:
         ASSERT_NOT_REACHED();
         return PlatformEvent::TouchCancel;
     }
 }

 static PlatformTouchPoint::TouchPhaseType touchPhaseFromPlatformEventType(PlatformEvent::Type type)
 {
     switch (type) {
     case PlatformEvent::TouchStart:
         return PlatformTouchPoint::TouchPhaseBegan;
     case PlatformEvent::TouchMove:
         return PlatformTouchPoint::TouchPhaseMoved;
     case PlatformEvent::TouchEnd:
         return PlatformTouchPoint::TouchPhaseEnded;
     default:
         ASSERT_NOT_REACHED();
         return PlatformTouchPoint::TouchPhaseCancelled;
     }
 }

 class PlatformTouchPointBuilder : public PlatformTouchPoint {
 public:
     PlatformTouchPointBuilder(unsigned identifier, const IntPoint& location, TouchPhaseType phase)
         : PlatformTouchPoint(identifier, location, phase)
     {
     }
 };

 class PlatformTouchEventBuilder : public PlatformTouchEvent {
 public:
     PlatformTouchEventBuilder(WebEvent *event)
     {
         m_type = touchEventType(event);
         m_modifiers = modifiersForEvent(event);
         m_timestamp = WallTime::fromRawSeconds(event.timestamp);

         m_gestureScale = event.gestureScale;
         m_gestureRotation = event.gestureRotation;
         m_isGesture = event.isGesture;
         m_position = pointForEvent(event);
         m_globalPosition = globalPointForEvent(event);

         unsigned touchCount = event.touchCount;
         m_touchPoints.reserveInitialCapacity(touchCount);
         for (unsigned i = 0; i < touchCount; ++i) {
             unsigned identifier = [(NSNumber *)[event.touchIdentifiers objectAtIndex:i] unsignedIntValue];
             IntPoint location = IntPoint([(NSValue *)[event.touchLocations objectAtIndex:i] pointValue]);
             PlatformTouchPoint::TouchPhaseType touchPhase = convertTouchPhase([event.touchPhases objectAtIndex:i]);
             m_touchPoints.uncheckedAppend(PlatformTouchPointBuilder(identifier, location, touchPhase));
         }
     }

     PlatformTouchEventBuilder(PlatformEvent::Type type, IntPoint location)
     {
         m_type = type;
         m_timestamp = WallTime::now();

         m_gestureScale = 1;
         m_gestureRotation = 0;
         m_isGesture = 0;
         m_position = location;
         m_globalPosition = location;
         m_isPotentialTap = true;

         unsigned touchCount = 1;
         m_touchPoints.reserveInitialCapacity(touchCount);
         for (unsigned i = 0; i < touchCount; ++i)
             m_touchPoints.uncheckedAppend(PlatformTouchPointBuilder(1, location, touchPhaseFromPlatformEventType(type)));
     }
 };

 PlatformTouchEvent PlatformEventFactory::createPlatformTouchEvent(WebEvent *event)
 {
     return PlatformTouchEventBuilder(event);
 }

 PlatformTouchEvent PlatformEventFactory::createPlatformSimulatedTouchEvent(PlatformEvent::Type type, IntPoint location)
 {
     return PlatformTouchEventBuilder(type, location);
 }

 #endif // ENABLE(TOUCH_EVENTS)

 } // namespace WebCore

 #endif // PLATFORM(IOS)
	/*
	* Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2014 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#import "config.h"
	#import "PlatformEventFactoryIOS.h"

	#if PLATFORM(IOS)

	#import "IntPoint.h"
	#import "KeyEventCocoa.h"
	#import "Logging.h"
	#import "WAKAppKitStubs.h"
	#import "WebEvent.h"
	#import "WindowsKeyboardCodes.h"
	#import <wtf/WallTime.h>

	namespace WebCore {

	static OptionSet<PlatformEvent::Modifier> modifiersForEvent(WebEvent *event)
	{
	OptionSet<PlatformEvent::Modifier> modifiers;

	if (event.modifierFlags & WebEventFlagMaskShift)
	modifiers \|= PlatformEvent::Modifier::ShiftKey;
	if (event.modifierFlags & WebEventFlagMaskControl)
	modifiers \|= PlatformEvent::Modifier::CtrlKey;
	if (event.modifierFlags & WebEventFlagMaskAlternate)
	modifiers \|= PlatformEvent::Modifier::AltKey;
	if (event.modifierFlags & WebEventFlagMaskCommand)
	modifiers \|= PlatformEvent::Modifier::MetaKey;
	if (event.modifierFlags & WebEventFlagMaskAlphaShift)
	modifiers \|= PlatformEvent::Modifier::CapsLockKey;

	return modifiers;
	}

	static inline IntPoint pointForEvent(WebEvent *event)
	{
	return IntPoint(event.locationInWindow);
	}

	static inline IntPoint globalPointForEvent(WebEvent *event)
	{
	// iOS WebKit works as if it is full screen. Therefore Web coords are Global coords.
	return pointForEvent(event);
	}

	static PlatformEvent::Type mouseEventType(WebEvent *event)
	{
	switch (event.type) {
	case WebEventMouseDown:
	return PlatformEvent::MousePressed;
	case WebEventMouseUp:
	return PlatformEvent::MouseReleased;
	case WebEventMouseMoved:
	return PlatformEvent::MouseMoved;
	default:
	ASSERT_NOT_REACHED();
	return PlatformEvent::MousePressed;
	}
	}

	class PlatformMouseEventBuilder : public PlatformMouseEvent {
	public:
	PlatformMouseEventBuilder(WebEvent *event)
	{
	m_type = mouseEventType(event);
	m_timestamp = WallTime::now();

	m_position = pointForEvent(event);
	m_globalPosition = globalPointForEvent(event);
	m_button = LeftButton; // This has always been the LeftButton on iOS.
	m_clickCount = 1; // This has always been 1 on iOS.
	}
	};

	PlatformMouseEvent PlatformEventFactory::createPlatformMouseEvent(WebEvent *event)
	{
	return PlatformMouseEventBuilder(event);
	}

	class PlatformWheelEventBuilder : public PlatformWheelEvent {
	public:
	PlatformWheelEventBuilder(WebEvent *event)
	{
	ASSERT(event.type == WebEventScrollWheel);

	m_type = PlatformEvent::Wheel;
	m_timestamp = WallTime::now();

	m_position = pointForEvent(event);
	m_globalPosition = globalPointForEvent(event);
	m_deltaX = event.deltaX;
	m_deltaY = event.deltaY;
	m_granularity = ScrollByPixelWheelEvent; // iOS only supports continuous (pixel-mode) scrolling.
	}
	};

	PlatformWheelEvent PlatformEventFactory::createPlatformWheelEvent(WebEvent *event)
	{
	return PlatformWheelEventBuilder(event);
	}

	String keyIdentifierForKeyEvent(WebEvent *event)
	{
	NSString *s = event.charactersIgnoringModifiers;
	if ([s length] != 1) {
	LOG(Events, "received an unexpected number of characters in key event: %u", [s length]);
	return "Unidentified";
	}

	return keyIdentifierForCharCode(CFStringGetCharacterAtIndex((CFStringRef)s, 0));
	}

	String keyForKeyEvent(WebEvent *event)
	{
	NSString *characters = event.characters;
	auto length = [characters length];

	// characters return an empty string for dead keys.
	// https://developer.apple.com/reference/appkit/nsevent/1534183-characters
	// "Dead" is defined here https://w3c.github.io/uievents-key/#keys-composition.
	if (!length)
	return ASCIILiteral("Dead");

	if (length > 1)
	return characters;

	return keyForCharCode([characters characterAtIndex:0]);
	}

	// https://w3c.github.io/uievents-code/
	String codeForKeyEvent(WebEvent *event)
	{
	switch (event.keyCode) {
	// Keys in the alphanumeric section.
	case VK_OEM_3: return ASCIILiteral("Backquote");
	case VK_OEM_5: return ASCIILiteral("Backslash");
	case VK_BACK: return ASCIILiteral("Backspace");
	case VK_OEM_4: return ASCIILiteral("BracketLeft");
	case VK_OEM_6: return ASCIILiteral("BracketRight");
	case VK_OEM_COMMA: return ASCIILiteral("Comma");
	case VK_0: return ASCIILiteral("Digit0");
	case VK_1: return ASCIILiteral("Digit1");
	case VK_2: return ASCIILiteral("Digit2");
	case VK_3: return ASCIILiteral("Digit3");
	case VK_4: return ASCIILiteral("Digit4");
	case VK_5: return ASCIILiteral("Digit5");
	case VK_6: return ASCIILiteral("Digit6");
	case VK_7: return ASCIILiteral("Digit7");
	case VK_8: return ASCIILiteral("Digit8");
	case VK_9: return ASCIILiteral("Digit9");
	case VK_OEM_PLUS: return ASCIILiteral("Equal");
	case VK_OEM_102: return ASCIILiteral("IntlBackslash");
	// IntlRo.
	// IntlYen.
	case VK_A: return ASCIILiteral("KeyA");
	case VK_B: return ASCIILiteral("KeyB");
	case VK_C: return ASCIILiteral("KeyC");
	case VK_D: return ASCIILiteral("KeyD");
	case VK_E: return ASCIILiteral("KeyE");
	case VK_F: return ASCIILiteral("KeyF");
	case VK_G: return ASCIILiteral("KeyG");
	case VK_H: return ASCIILiteral("KeyH");
	case VK_I: return ASCIILiteral("KeyI");
	case VK_J: return ASCIILiteral("KeyJ");
	case VK_K: return ASCIILiteral("KeyK");
	case VK_L: return ASCIILiteral("KeyL");
	case VK_M: return ASCIILiteral("KeyM");
	case VK_N: return ASCIILiteral("KeyN");
	case VK_O: return ASCIILiteral("KeyO");
	case VK_P: return ASCIILiteral("KeyP");
	case VK_Q: return ASCIILiteral("KeyQ");
	case VK_R: return ASCIILiteral("KeyR");
	case VK_S: return ASCIILiteral("KeyS");
	case VK_T: return ASCIILiteral("KeyT");
	case VK_U: return ASCIILiteral("KeyU");
	case VK_V: return ASCIILiteral("KeyV");
	case VK_W: return ASCIILiteral("KeyW");
	case VK_X: return ASCIILiteral("KeyX");
	case VK_Y: return ASCIILiteral("KeyY");
	case VK_Z: return ASCIILiteral("KeyZ");
	case VK_OEM_MINUS: return ASCIILiteral("Minus");
	case VK_OEM_PERIOD: return ASCIILiteral("Period");
	case VK_OEM_7: return ASCIILiteral("Quote");
	case VK_OEM_1: return ASCIILiteral("Semicolon");
	case VK_OEM_2: return ASCIILiteral("Slash");

	// Functional keys in alphanumeric section.
	case VK_MENU: return ASCIILiteral("AltLeft");
	// AltRight.
	case VK_CAPITAL: return ASCIILiteral("CapsLock");
	// ContextMenu.
	case VK_LCONTROL: return ASCIILiteral("ControlLeft");
	case VK_RCONTROL: return ASCIILiteral("ControlRight");
	case VK_RETURN: return ASCIILiteral("Enter"); // Labeled Return on Apple keyboards.
	case VK_LWIN: return ASCIILiteral("MetaLeft");
	case VK_RWIN: return ASCIILiteral("MetaRight");
	case VK_LSHIFT: return ASCIILiteral("ShiftLeft");
	case VK_RSHIFT: return ASCIILiteral("ShiftRight");
	case VK_SPACE: return ASCIILiteral("Space");
	case VK_TAB: return ASCIILiteral("Tab");

	// Functional keys found on Japanese and Korean keyboards.
	// Convert.
	case VK_KANA: return ASCIILiteral("KanaMode");
	// Lang1.
	// Lang2.
	// Lang3.
	// Lang4.
	// Lang5.
	// NonConvert.

	// Keys in the ControlPad section.
	// Delete
	case VK_END: return ASCIILiteral("End");
	case VK_HELP: return ASCIILiteral("Help");
	case VK_HOME: return ASCIILiteral("Home");
	// Insert: Not present on Apple keyboards.
	case VK_NEXT: return ASCIILiteral("PageDown");
	case VK_PRIOR: return ASCIILiteral("PageUp");

	// Keys in the ArrowPad section.
	case VK_DOWN: return ASCIILiteral("ArrowDown");
	case VK_LEFT: return ASCIILiteral("ArrowLeft");
	case VK_RIGHT: return ASCIILiteral("ArrowRight");
	case VK_UP: return ASCIILiteral("ArrowUp");

	// Keys in the Numpad section.
	case VK_NUMLOCK: return ASCIILiteral("NumLock");
	case VK_NUMPAD0: return ASCIILiteral("Numpad0");
	case VK_NUMPAD1: return ASCIILiteral("Numpad1");
	case VK_NUMPAD2: return ASCIILiteral("Numpad2");
	case VK_NUMPAD3: return ASCIILiteral("Numpad3");
	case VK_NUMPAD4: return ASCIILiteral("Numpad4");
	case VK_NUMPAD5: return ASCIILiteral("Numpad5");
	case VK_NUMPAD6: return ASCIILiteral("Numpad6");
	case VK_NUMPAD7: return ASCIILiteral("Numpad7");
	case VK_NUMPAD8: return ASCIILiteral("Numpad8");
	case VK_NUMPAD9: return ASCIILiteral("Numpad9");
	case VK_ADD: return ASCIILiteral("NumpadAdd");
	// NumpadBackspace.
	// NumpadClear.
	// NumpadClearEntry.
	case VK_SEPARATOR: return ASCIILiteral("NumpadComma");
	case VK_DECIMAL: return ASCIILiteral("NumpadDecimal");
	case VK_DIVIDE: return ASCIILiteral("NumpadDivide");
	// NumpadEnter.
	case VK_CLEAR: return ASCIILiteral("NumpadEqual");
	// NumpadHash.
	// NumpadMemoryAdd.
	// NumpadMemoryClear.
	// NumpadMemoryRecall.
	// NumpadMemoryStore.
	// NumpadMemorySubtract.
	case VK_MULTIPLY: return ASCIILiteral("NumpadMultiply");
	// NumpadParenLeft.
	// NumpadParenRight.
	// NumpadStar: The specification says to use "NumpadMultiply" for the * key on numeric keypads.
	case VK_SUBTRACT: return ASCIILiteral("NumpadSubtract");

	// Keys in the Function section.
	case VK_ESCAPE: return ASCIILiteral("Escape");
	case VK_F1: return ASCIILiteral("F1");
	case VK_F2: return ASCIILiteral("F2");
	case VK_F3: return ASCIILiteral("F3");
	case VK_F4: return ASCIILiteral("F4");
	case VK_F5: return ASCIILiteral("F5");
	case VK_F6: return ASCIILiteral("F6");
	case VK_F7: return ASCIILiteral("F7");
	case VK_F8: return ASCIILiteral("F8");
	case VK_F9: return ASCIILiteral("F9");
	case VK_F10: return ASCIILiteral("F10");
	case VK_F11: return ASCIILiteral("F11");
	case VK_F12: return ASCIILiteral("F12");
	case VK_F13: return ASCIILiteral("F13");
	case VK_F14: return ASCIILiteral("F14");
	case VK_F15: return ASCIILiteral("F15");
	case VK_F16: return ASCIILiteral("F16");
	case VK_F17: return ASCIILiteral("F17");
	case VK_F18: return ASCIILiteral("F18");
	case VK_F19: return ASCIILiteral("F19");
	case VK_F20: return ASCIILiteral("F20");
	// Fn: This is typically a hardware key that does not generate a separate code.
	// FnLock.
	// PrintScreen.
	// ScrollLock.
	// Pause.

	// Media keys.
	// BrowserBack.
	// BrowserFavorites.
	// BrowserForward.
	// BrowserHome.
	// BrowserRefresh.
	// BrowserSearch.
	// BrowserStop.
	// Eject.
	// LaunchApp1.
	// LaunchApp2.
	// LaunchMail.
	// MediaPlayPause.
	// MediaSelect.
	// MediaStop.
	// MediaTrackNext.
	// MediaTrackPrevious.
	// Power.
	// Sleep.
	case VK_VOLUME_DOWN: return ASCIILiteral("AudioVolumeDown");
	case VK_VOLUME_MUTE: return ASCIILiteral("AudioVolumeMute");
	case VK_VOLUME_UP: return ASCIILiteral("AudioVolumeUp");
	// WakeUp.

	// Legacy modifier keys.
	// Hyper.
	// Super.
	// Turbo.

	// Legacy process control keys.
	// Abort.
	// Resume.
	// Suspend.

	// Legacy editing keys.
	// Again.
	// Copy.
	// Cut.
	// Find.
	// Open.
	// Paste.
	// Props.
	// Select.
	// Undo.

	// Keys found on international keyboards.
	// Hiragana.
	// Katakana.

	default:
	return ASCIILiteral("Unidentified");
	}
	}

	class PlatformKeyboardEventBuilder : public PlatformKeyboardEvent {
	public:
	PlatformKeyboardEventBuilder(WebEvent *event)
	{
	ASSERT(event.type == WebEventKeyDown \|\| event.type == WebEventKeyUp);

	m_type = (event.type == WebEventKeyUp ? PlatformEvent::KeyUp : PlatformEvent::KeyDown);
	m_modifiers = modifiersForEvent(event);
	m_timestamp = WallTime::now();

	m_text = event.characters;
	m_unmodifiedText = event.charactersIgnoringModifiers;
	m_key = keyForKeyEvent(event);
	m_code = codeForKeyEvent(event);
	m_keyIdentifier = keyIdentifierForKeyEvent(event);
	m_windowsVirtualKeyCode = event.keyCode;
	m_autoRepeat = event.isKeyRepeating;
	m_isKeypad = false; // iOS does not distinguish the numpad. See <rdar://problem/7190835>.
	m_isSystemKey = false;
	m_Event = event;

	// Always use 13 for Enter/Return -- we don't want to use AppKit's different character for Enter.
	if (m_windowsVirtualKeyCode == '\r') {
	m_text = "\r";
	m_unmodifiedText = "\r";
	}

	// The adjustments below are only needed in backward compatibility mode, but we cannot tell what mode we are in from here.

	// Turn 0x7F into 8, because backspace needs to always be 8.
	if (m_text == "\x7F")
	m_text = "\x8";
	if (m_unmodifiedText == "\x7F")
	m_unmodifiedText = "\x8";
	// Always use 9 for tab -- we don't want to use AppKit's different character for shift-tab.
	if (m_windowsVirtualKeyCode == 9) {
	m_text = "\x9";
	m_unmodifiedText = "\x9";
	}
	}
	};

	PlatformKeyboardEvent PlatformEventFactory::createPlatformKeyboardEvent(WebEvent *event)
	{
	return PlatformKeyboardEventBuilder(event);
	}

	#if ENABLE(TOUCH_EVENTS)
	static PlatformTouchPoint::TouchPhaseType convertTouchPhase(NSNumber *touchPhaseNumber)
	{
	WebEventTouchPhaseType touchPhase = static_cast<WebEventTouchPhaseType>([touchPhaseNumber unsignedIntValue]);
	switch (touchPhase) {
	case WebEventTouchPhaseBegan:
	return PlatformTouchPoint::TouchPhaseBegan;
	case WebEventTouchPhaseMoved:
	return PlatformTouchPoint::TouchPhaseMoved;
	case WebEventTouchPhaseStationary:
	return PlatformTouchPoint::TouchPhaseStationary;
	case WebEventTouchPhaseEnded:
	return PlatformTouchPoint::TouchPhaseEnded;
	case WebEventTouchPhaseCancelled:
	return PlatformTouchPoint::TouchPhaseCancelled;
	default:
	ASSERT_NOT_REACHED();
	}
	return PlatformTouchPoint::TouchPhaseBegan;
	}

	static PlatformEvent::Type touchEventType(WebEvent *event)
	{
	switch (event.type) {
	case WebEventTouchBegin:
	return PlatformEvent::TouchStart;
	case WebEventTouchEnd:
	return PlatformEvent::TouchEnd;
	case WebEventTouchCancel:
	return PlatformEvent::TouchCancel;
	case WebEventTouchChange:
	return PlatformEvent::TouchMove;
	default:
	ASSERT_NOT_REACHED();
	return PlatformEvent::TouchCancel;
	}
	}

	static PlatformTouchPoint::TouchPhaseType touchPhaseFromPlatformEventType(PlatformEvent::Type type)
	{
	switch (type) {
	case PlatformEvent::TouchStart:
	return PlatformTouchPoint::TouchPhaseBegan;
	case PlatformEvent::TouchMove:
	return PlatformTouchPoint::TouchPhaseMoved;
	case PlatformEvent::TouchEnd:
	return PlatformTouchPoint::TouchPhaseEnded;
	default:
	ASSERT_NOT_REACHED();
	return PlatformTouchPoint::TouchPhaseCancelled;
	}
	}

	class PlatformTouchPointBuilder : public PlatformTouchPoint {
	public:
	PlatformTouchPointBuilder(unsigned identifier, const IntPoint& location, TouchPhaseType phase)
	: PlatformTouchPoint(identifier, location, phase)
	{
	}
	};

	class PlatformTouchEventBuilder : public PlatformTouchEvent {
	public:
	PlatformTouchEventBuilder(WebEvent *event)
	{
	m_type = touchEventType(event);
	m_modifiers = modifiersForEvent(event);
	m_timestamp = WallTime::fromRawSeconds(event.timestamp);

	m_gestureScale = event.gestureScale;
	m_gestureRotation = event.gestureRotation;
	m_isGesture = event.isGesture;
	m_position = pointForEvent(event);
	m_globalPosition = globalPointForEvent(event);

	unsigned touchCount = event.touchCount;
	m_touchPoints.reserveInitialCapacity(touchCount);
	for (unsigned i = 0; i < touchCount; ++i) {
	unsigned identifier = [(NSNumber *)[event.touchIdentifiers objectAtIndex:i] unsignedIntValue];
	IntPoint location = IntPoint([(NSValue *)[event.touchLocations objectAtIndex:i] pointValue]);
	PlatformTouchPoint::TouchPhaseType touchPhase = convertTouchPhase([event.touchPhases objectAtIndex:i]);
	m_touchPoints.uncheckedAppend(PlatformTouchPointBuilder(identifier, location, touchPhase));
	}
	}

	PlatformTouchEventBuilder(PlatformEvent::Type type, IntPoint location)
	{
	m_type = type;
	m_timestamp = WallTime::now();

	m_gestureScale = 1;
	m_gestureRotation = 0;
	m_isGesture = 0;
	m_position = location;
	m_globalPosition = location;
	m_isPotentialTap = true;

	unsigned touchCount = 1;
	m_touchPoints.reserveInitialCapacity(touchCount);
	for (unsigned i = 0; i < touchCount; ++i)
	m_touchPoints.uncheckedAppend(PlatformTouchPointBuilder(1, location, touchPhaseFromPlatformEventType(type)));
	}
	};

	PlatformTouchEvent PlatformEventFactory::createPlatformTouchEvent(WebEvent *event)
	{
	return PlatformTouchEventBuilder(event);
	}

	PlatformTouchEvent PlatformEventFactory::createPlatformSimulatedTouchEvent(PlatformEvent::Type type, IntPoint location)
	{
	return PlatformTouchEventBuilder(type, location);
	}

	#endif // ENABLE(TOUCH_EVENTS)

	} // namespace WebCore

	#endif // PLATFORM(IOS)