/*
 * Copyright (C) 2003 Apple Computer, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
 * 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 "KWQEvent.h"

#import "KWQLogging.h"

static QString keyIdentifierForKeyEvent(NSEvent *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";
    }
    unichar c = [s characterAtIndex:0];
    switch (c) {
        // Each identifier listed in the DOM spec is listed here.
        // Many are simply commented out since they do not appear on standard Macintosh keyboards
        // or are on a key that doesn't have a corresponding character.

        // "Accept"
        // "AllCandidates"
        // "Alt"
        // "Apps"
        // "BrowserBack"
        // "BrowserForward"
        // "BrowserHome"
        // "BrowserRefresh"
        // "BrowserSearch"
        // "BrowserStop"
        // "CapsLock"

        // "Clear"
        case NSClearLineFunctionKey:
            return "Clear";

        // "CodeInput"
        // "Compose"
        // "Control"
        // "Crsel"
        // "Convert"
        // "Copy"
        // "Cut"

        // "Down"
        case NSDownArrowFunctionKey:
            return "Down";
        // "End"
        case NSEndFunctionKey:
            return "End";
        // "Enter"
        case 0x3: case 0xD: // Macintosh calls the one on the main keyboard Return, but Windows calls it Enter, so we'll do the same for the DOM
            return "Enter";

        // "EraseEof"

        // "Execute"
        case NSExecuteFunctionKey:
            return "Execute";

        // "Exsel"

        // "F1"
        case NSF1FunctionKey:
            return "F1";
        // "F2"
        case NSF2FunctionKey:
            return "F2";
        // "F3"
        case NSF3FunctionKey:
            return "F3";
        // "F4"
        case NSF4FunctionKey:
            return "F4";
        // "F5"
        case NSF5FunctionKey:
            return "F5";
        // "F6"
        case NSF6FunctionKey:
            return "F6";
        // "F7"
        case NSF7FunctionKey:
            return "F7";
        // "F8"
        case NSF8FunctionKey:
            return "F8";
        // "F9"
        case NSF9FunctionKey:
            return "F9";
        // "F10"
        case NSF10FunctionKey:
            return "F10";
        // "F11"
        case NSF11FunctionKey:
            return "F11";
        // "F12"
        case NSF12FunctionKey:
            return "F12";
        // "F13"
        case NSF13FunctionKey:
            return "F13";
        // "F14"
        case NSF14FunctionKey:
            return "F14";
        // "F15"
        case NSF15FunctionKey:
            return "F15";
        // "F16"
        case NSF16FunctionKey:
            return "F16";
        // "F17"
        case NSF17FunctionKey:
            return "F17";
        // "F18"
        case NSF18FunctionKey:
            return "F18";
        // "F19"
        case NSF19FunctionKey:
            return "F19";
        // "F20"
        case NSF20FunctionKey:
            return "F20";
        // "F21"
        case NSF21FunctionKey:
            return "F21";
        // "F22"
        case NSF22FunctionKey:
            return "F22";
        // "F23"
        case NSF23FunctionKey:
            return "F23";
        // "F24"
        case NSF24FunctionKey:
            return "F24";

        // "FinalMode"

        // "Find"
        case NSFindFunctionKey:
            return "Find";
        // "ForwardDelete" (Non-standard)
        case NSDeleteFunctionKey:
            return "ForwardDelete";

        // "FullWidth"
        // "HalfWidth"
        // "HangulMode"
        // "HanjaMode"

        // "Help"
        case NSHelpFunctionKey:
            return "Help";

        // "Hiragana"

        // "Home"
        case NSHomeFunctionKey:
            return "Home";
        // "Insert"
        case NSInsertFunctionKey:
            return "Left";

        // "JapaneseHiragana"
        // "JapaneseKatakana"
        // "JapaneseRomaji"
        // "JunjaMode"
        // "KanaMode"
        // "KanjiMode"
        // "Katakana"
        // "LaunchApplication1"
        // "LaunchApplication2"
        // "LaunchMail"

        // "Left"
        case NSLeftArrowFunctionKey:
            return "Left";

        // "Meta"
        // "MediaNextTrack"
        // "MediaPlayPause"
        // "MediaPreviousTrack"
        // "MediaStop"

        // "ModeChange"
        case NSModeSwitchFunctionKey:
            return "ModeChange";

        // "Nonconvert"
        // "NumLock"

        // "PageDown"
        case NSPageDownFunctionKey:
            return "PageDown";
        // "PageUp"
        case NSPageUpFunctionKey:
            return "PageUp";

        // "Paste"

        // "Pause"
        case NSPauseFunctionKey:
            return "Pause";

        // "Play"
        // "PreviousCandidate"

        // "PrintScreen"
        case NSPrintScreenFunctionKey:
            return "PrintScreen";

        // "Process"
        // "Props"

        // "Right"
        case NSRightArrowFunctionKey:
            return "Right";

        // "RomanCharacters"
        // "Scroll"
        // "Select"
        // "SelectMedia"
        // "Shift"

        // "Stop"
        case NSStopFunctionKey:
            return "Stop";
        // "Up"
        case NSUpArrowFunctionKey:
            return "Up";
        // "Undo"
        case NSUndoFunctionKey:
            return "Undo";

        // "VolumeDown"
        // "VolumeMute"
        // "VolumeUp"
        // "Win"
        // "Zoom"

        // Turn 0x7F into 0x08, because backspace needs to always be 0x08.
        case 0x7F:
            return "U+000008";

        default:
            return QString().sprintf("U+%06X", toupper(c));
    }
}

static bool isKeypadEvent(NSEvent *event)
{
    // Check that this is the type of event that has a keyCode.
    switch ([event type]) {
	case NSKeyDown:
	case NSKeyUp:
	case NSFlagsChanged:
            break;
        default:
            return false;
    }

    switch ([event keyCode]) {
        case 71: // Clear
        case 81: // =
        case 75: // /
        case 67: // *
        case 78: // -
        case 69: // +
        case 76: // Enter
        case 65: // .
        case 82: // 0
        case 83: // 1
        case 84: // 2
        case 85: // 3
        case 86: // 4
        case 87: // 5
        case 88: // 6
        case 89: // 7
        case 91: // 8
        case 92: // 9
            return true;
     }
     
     return false;
}

static int WindowsKeyCodeForKeyEvent(NSEvent *event)
{
    switch ([event keyCode]) {
        // VK_CLEAR (0C) CLEAR key
        case 71: return 0x0C;

        // VK_NUMPAD0 (60) Numeric keypad 0 key
        case 82: return 0x60;
        // VK_NUMPAD1 (61) Numeric keypad 1 key
        case 83: return 0x61;
        // VK_NUMPAD2 (62) Numeric keypad 2 key
        case 84: return 0x62;
        // VK_NUMPAD3 (63) Numeric keypad 3 key
        case 85: return 0x63;
        // VK_NUMPAD4 (64) Numeric keypad 4 key
        case 86: return 0x64;
        // VK_NUMPAD5 (65) Numeric keypad 5 key
        case 87: return 0x65;
        // VK_NUMPAD6 (66) Numeric keypad 6 key
        case 88: return 0x66;
        // VK_NUMPAD7 (67) Numeric keypad 7 key
        case 89: return 0x67;
        // VK_NUMPAD8 (68) Numeric keypad 8 key
        case 91: return 0x68;
        // VK_NUMPAD9 (69) Numeric keypad 9 key
        case 92: return 0x69;
        // VK_MULTIPLY (6A) Multiply key
        case 67: return 0x6A;
        // VK_ADD (6B) Add key
        case 69: return 0x6B;

        // VK_SUBTRACT (6D) Subtract key
        case 78: return 0x6D;
        // VK_DECIMAL (6E) Decimal key
        case 65: return 0x6E;
        // VK_DIVIDE (6F) Divide key
        case 75: return 0x6F;
     }

    NSString *s = [event charactersIgnoringModifiers];
    if ([s length] != 1) {
        return 0;
    }

    switch ([s characterAtIndex:0]) {
        // VK_LBUTTON (01) Left mouse button
        // VK_RBUTTON (02) Right mouse button
        // VK_CANCEL (03) Control-break processing
        // VK_MBUTTON (04) Middle mouse button (three-button mouse)
        // VK_XBUTTON1 (05)
        // VK_XBUTTON2 (06)

        // VK_BACK (08) BACKSPACE key
        case 8: case 0x7F: return 0x08;
        // VK_TAB (09) TAB key
        case 9: return 0x09;

        // VK_CLEAR (0C) CLEAR key
        // handled by key code above

        // VK_RETURN (0D)
        case 0xD: case 3: return 0x0D;

        // VK_SHIFT (10) SHIFT key
        // VK_CONTROL (11) CTRL key
        // VK_MENU (12) ALT key

        // VK_PAUSE (13) PAUSE key
        case NSPauseFunctionKey: return 0x13;

        // VK_CAPITAL (14) CAPS LOCK key
        // VK_KANA (15) Input Method Editor (IME) Kana mode
        // VK_HANGUEL (15) IME Hanguel mode (maintained for compatibility; use VK_HANGUL)
        // VK_HANGUL (15) IME Hangul mode
        // VK_JUNJA (17) IME Junja mode
        // VK_FINAL (18) IME final mode
        // VK_HANJA (19) IME Hanja mode
        // VK_KANJI (19) IME Kanji mode

        // VK_ESCAPE (1B) ESC key
        case 0x1B: return 0x1B;

        // VK_CONVERT (1C) IME convert
        // VK_NONCONVERT (1D) IME nonconvert
        // VK_ACCEPT (1E) IME accept
        // VK_MODECHANGE (1F) IME mode change request

        // VK_SPACE (20) SPACEBAR
        case ' ': return 0x20;
        // VK_PRIOR (21) PAGE UP key
        case NSPageUpFunctionKey: return 0x21;
        // VK_NEXT (22) PAGE DOWN key
        case NSPageDownFunctionKey: return 0x22;
        // VK_END (23) END key
        case NSEndFunctionKey: return 0x23;
        // VK_HOME (24) HOME key
        case NSHomeFunctionKey: return 0x24;
        // VK_LEFT (25) LEFT ARROW key
        case NSLeftArrowFunctionKey: return 0x25;
        // VK_UP (26) UP ARROW key
        case NSUpArrowFunctionKey: return 0x26;
        // VK_RIGHT (27) RIGHT ARROW key
        case NSRightArrowFunctionKey: return 0x27;
        // VK_DOWN (28) DOWN ARROW key
        case NSDownArrowFunctionKey: return 0x28;
        // VK_SELECT (29) SELECT key
        case NSSelectFunctionKey: return 0x29;
        // VK_PRINT (2A) PRINT key
        case NSPrintFunctionKey: return 0x2A;
        // VK_EXECUTE (2B) EXECUTE key
        case NSExecuteFunctionKey: return 0x2B;
        // VK_SNAPSHOT (2C) PRINT SCREEN key
        case NSPrintScreenFunctionKey: return 0x2C;
        // VK_INSERT (2D) INS key
        case NSInsertFunctionKey: case NSHelpFunctionKey: return 0x2D;
        // VK_DELETE (2E) DEL key
        case NSDeleteFunctionKey: return 0x2E;

        // VK_HELP (2F) HELP key

        //  (30) 0 key
        case '0': case ')': return 0x30;
        //  (31) 1 key
        case '1': case '!': return 0x31;
        //  (32) 2 key
        case '2': case '@': return 0x32;
        //  (33) 3 key
        case '3': case '#': return 0x33;
        //  (34) 4 key
        case '4': case '$': return 0x34;
        //  (35) 5 key
        case '5': case '%': return 0x35;
        //  (36) 6 key
        case '6': case '^': return 0x36;
        //  (37) 7 key
        case '7': case '&': return 0x37;
        //  (38) 8 key
        case '8': case '*': return 0x38;
        //  (39) 9 key
        case '9': case '(': return 0x39;
        //  (41) A key
        case 'a': case 'A': return 0x41;
        //  (42) B key
        case 'b': case 'B': return 0x42;
        //  (43) C key
        case 'c': case 'C': return 0x43;
        //  (44) D key
        case 'd': case 'D': return 0x44;
        //  (45) E key
        case 'e': case 'E': return 0x45;
        //  (46) F key
        case 'f': case 'F': return 0x46;
        //  (47) G key
        case 'g': case 'G': return 0x47;
        //  (48) H key
        case 'h': case 'H': return 0x48;
        //  (49) I key
        case 'i': case 'I': return 0x49;
        //  (4A) J key
        case 'j': case 'J': return 0x4A;
        //  (4B) K key
        case 'k': case 'K': return 0x4B;
        //  (4C) L key
        case 'l': case 'L': return 0x4C;
        //  (4D) M key
        case 'm': case 'M': return 0x4D;
        //  (4E) N key
        case 'n': case 'N': return 0x4E;
        //  (4F) O key
        case 'o': case 'O': return 0x4F;
        //  (50) P key
        case 'p': case 'P': return 0x50;
        //  (51) Q key
        case 'q': case 'Q': return 0x51;
        //  (52) R key
        case 'r': case 'R': return 0x52;
        //  (53) S key
        case 's': case 'S': return 0x53;
        //  (54) T key
        case 't': case 'T': return 0x54;
        //  (55) U key
        case 'u': case 'U': return 0x55;
        //  (56) V key
        case 'v': case 'V': return 0x56;
        //  (57) W key
        case 'w': case 'W': return 0x57;
        //  (58) X key
        case 'x': case 'X': return 0x58;
        //  (59) Y key
        case 'y': case 'Y': return 0x59;
        //  (5A) Z key
        case 'z': case 'Z': return 0x5A;

        // VK_LWIN (5B) Left Windows key (Microsoft Natural keyboard)
        // VK_RWIN (5C) Right Windows key (Natural keyboard)
        // VK_APPS (5D) Applications key (Natural keyboard)
        // VK_SLEEP (5F) Computer Sleep key

        // VK_NUMPAD0 (60) Numeric keypad 0 key
        // VK_NUMPAD1 (61) Numeric keypad 1 key
        // VK_NUMPAD2 (62) Numeric keypad 2 key
        // VK_NUMPAD3 (63) Numeric keypad 3 key
        // VK_NUMPAD4 (64) Numeric keypad 4 key
        // VK_NUMPAD5 (65) Numeric keypad 5 key
        // VK_NUMPAD6 (66) Numeric keypad 6 key
        // VK_NUMPAD7 (67) Numeric keypad 7 key
        // VK_NUMPAD8 (68) Numeric keypad 8 key
        // VK_NUMPAD9 (69) Numeric keypad 9 key
        // VK_MULTIPLY (6A) Multiply key
        // VK_ADD (6B) Add key
        // handled by key code above

        // VK_SEPARATOR (6C) Separator key

        // VK_SUBTRACT (6D) Subtract key
        // VK_DECIMAL (6E) Decimal key
        // VK_DIVIDE (6F) Divide key
        // handled by key code above

        // VK_F1 (70) F1 key
        case NSF1FunctionKey: return 0x70;
        // VK_F2 (71) F2 key
        case NSF2FunctionKey: return 0x71;
        // VK_F3 (72) F3 key
        case NSF3FunctionKey: return 0x72;
        // VK_F4 (73) F4 key
        case NSF4FunctionKey: return 0x73;
        // VK_F5 (74) F5 key
        case NSF5FunctionKey: return 0x74;
        // VK_F6 (75) F6 key
        case NSF6FunctionKey: return 0x75;
        // VK_F7 (76) F7 key
        case NSF7FunctionKey: return 0x76;
        // VK_F8 (77) F8 key
        case NSF8FunctionKey: return 0x77;
        // VK_F9 (78) F9 key
        case NSF9FunctionKey: return 0x78;
        // VK_F10 (79) F10 key
        case NSF10FunctionKey: return 0x79;
        // VK_F11 (7A) F11 key
        case NSF11FunctionKey: return 0x7A;
        // VK_F12 (7B) F12 key
        case NSF12FunctionKey: return 0x7B;
        // VK_F13 (7C) F13 key
        case NSF13FunctionKey: return 0x7C;
        // VK_F14 (7D) F14 key
        case NSF14FunctionKey: return 0x7D;
        // VK_F15 (7E) F15 key
        case NSF15FunctionKey: return 0x7E;
        // VK_F16 (7F) F16 key
        case NSF16FunctionKey: return 0x7F;
        // VK_F17 (80H) F17 key
        case NSF17FunctionKey: return 0x80;
        // VK_F18 (81H) F18 key
        case NSF18FunctionKey: return 0x81;
        // VK_F19 (82H) F19 key
        case NSF19FunctionKey: return 0x82;
        // VK_F20 (83H) F20 key
        case NSF20FunctionKey: return 0x83;
        // VK_F21 (84H) F21 key
        case NSF21FunctionKey: return 0x84;
        // VK_F22 (85H) F22 key
        case NSF22FunctionKey: return 0x85;
        // VK_F23 (86H) F23 key
        case NSF23FunctionKey: return 0x86;
        // VK_F24 (87H) F24 key
        case NSF24FunctionKey: return 0x87;

        // VK_NUMLOCK (90) NUM LOCK key

        // VK_SCROLL (91) SCROLL LOCK key
        case NSScrollLockFunctionKey: return 0x91;

        // VK_LSHIFT (A0) Left SHIFT key
        // VK_RSHIFT (A1) Right SHIFT key
        // VK_LCONTROL (A2) Left CONTROL key
        // VK_RCONTROL (A3) Right CONTROL key
        // VK_LMENU (A4) Left MENU key
        // VK_RMENU (A5) Right MENU key
        // VK_BROWSER_BACK (A6) Windows 2000/XP: Browser Back key
        // VK_BROWSER_FORWARD (A7) Windows 2000/XP: Browser Forward key
        // VK_BROWSER_REFRESH (A8) Windows 2000/XP: Browser Refresh key
        // VK_BROWSER_STOP (A9) Windows 2000/XP: Browser Stop key
        // VK_BROWSER_SEARCH (AA) Windows 2000/XP: Browser Search key
        // VK_BROWSER_FAVORITES (AB) Windows 2000/XP: Browser Favorites key
        // VK_BROWSER_HOME (AC) Windows 2000/XP: Browser Start and Home key
        // VK_VOLUME_MUTE (AD) Windows 2000/XP: Volume Mute key
        // VK_VOLUME_DOWN (AE) Windows 2000/XP: Volume Down key
        // VK_VOLUME_UP (AF) Windows 2000/XP: Volume Up key
        // VK_MEDIA_NEXT_TRACK (B0) Windows 2000/XP: Next Track key
        // VK_MEDIA_PREV_TRACK (B1) Windows 2000/XP: Previous Track key
        // VK_MEDIA_STOP (B2) Windows 2000/XP: Stop Media key
        // VK_MEDIA_PLAY_PAUSE (B3) Windows 2000/XP: Play/Pause Media key
        // VK_LAUNCH_MAIL (B4) Windows 2000/XP: Start Mail key
        // VK_LAUNCH_MEDIA_SELECT (B5) Windows 2000/XP: Select Media key
        // VK_LAUNCH_APP1 (B6) Windows 2000/XP: Start Application 1 key
        // VK_LAUNCH_APP2 (B7) Windows 2000/XP: Start Application 2 key

        // VK_OEM_1 (BA) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the ';:' key
        case ';': case ':': return 0xBA;
        // VK_OEM_PLUS (BB) Windows 2000/XP: For any country/region, the '+' key
        case '=': case '+': return 0xBB;
        // VK_OEM_COMMA (BC) Windows 2000/XP: For any country/region, the ',' key
        case ',': case '<': return 0xBC;
        // VK_OEM_MINUS (BD) Windows 2000/XP: For any country/region, the '-' key
        case '-': case '_': return 0xBD;
        // VK_OEM_PERIOD (BE) Windows 2000/XP: For any country/region, the '.' key
        case '.': case '>': return 0xBE;
        // VK_OEM_2 (BF) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the '/?' key
        case '/': case '?': return 0xBF;
        // VK_OEM_3 (C0) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the '`~' key
        case '`': case '~': return 0xC0;
        // VK_OEM_4 (DB) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the '[{' key
        case '[': case '{': return 0xDB;
        // VK_OEM_5 (DC) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the '\|' key
        case '\\': case '|': return 0xDC;
        // VK_OEM_6 (DD) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the ']}' key
        case ']': case '}': return 0xDD;
        // VK_OEM_7 (DE) Used for miscellaneous characters; it can vary by keyboard. Windows 2000/XP: For the US standard keyboard, the 'single-quote/double-quote' key
        case '\'': case '"': return 0xDE;

        // VK_OEM_8 (DF) Used for miscellaneous characters; it can vary by keyboard.
        // VK_OEM_102 (E2) Windows 2000/XP: Either the angle bracket key or the backslash key on the RT 102-key keyboard
        // VK_PROCESSKEY (E5) Windows 95/98/Me, Windows NT 4.0, Windows 2000/XP: IME PROCESS key
        // VK_PACKET (E7) Windows 2000/XP: Used to pass Unicode characters as if they were keystrokes. The VK_PACKET key is the low word of a 32-bit Virtual Key value used for non-keyboard input methods. For more information, see Remark in KEYBDINPUT,SendInput, WM_KEYDOWN, and WM_KEYUP
        // VK_ATTN (F6) Attn key
        // VK_CRSEL (F7) CrSel key
        // VK_EXSEL (F8) ExSel key
        // VK_EREOF (F9) Erase EOF key
        // VK_PLAY (FA) Play key
        // VK_ZOOM (FB) Zoom key
        // VK_NONAME (FC) Reserved for future use
        // VK_PA1 (FD) PA1 key
        // VK_OEM_CLEAR (FE) Clear key
    }

    return 0;
}

static int mouseButtonForEvent(NSEvent *event)
{
    switch ([event type]) {
        case NSLeftMouseDown:
        case NSLeftMouseUp:
        case NSLeftMouseDragged:
            return Qt::LeftButton;
        case NSRightMouseDown:
        case NSRightMouseUp:
        case NSRightMouseDragged:
            return Qt::RightButton;
        case NSOtherMouseDown:
        case NSOtherMouseUp:
        case NSOtherMouseDragged:
            return Qt::MidButton;
        default:
            return Qt::NoButton;
    }
}

static int nonMouseButtonsForEvent(NSEvent *event)
{
    int buttons = 0;

    unsigned modifiers = [event modifierFlags];

    if (modifiers & NSControlKeyMask) {
        buttons |= Qt::ControlButton;
    }
    if (modifiers & NSShiftKeyMask) {
        buttons |= Qt::ShiftButton;
    }
    if (modifiers & NSAlternateKeyMask) {
        buttons |= Qt::AltButton;
    }
    if (modifiers & NSCommandKeyMask) {
        buttons |= Qt::MetaButton;
    }

    // I tried using NSNumericPadKeyMask, but it does not seem to work reliably.
    // One possible explanation is that the documentation says "Set if any key in
    // the numeric keypad is pressed." which may mean that it gets set if there
    // is any key down on the numeric keypad. But it could just be some kind of bug
    // or a mistake on my part. We could revisit this some day.
    if (isKeypadEvent(event)) {
        buttons |= Qt::Keypad;
    }

    return buttons;
}

// ======== 

QEvent::~QEvent()
{
}

// ======== 

QMouseEvent::QMouseEvent(Type type, const QPoint &position, int button, int state)
    : QEvent(type), _position(position)
{
    _button = button;
    if (type == MouseMove) {
        _clickCount = 0;
        _state = state | button;
        _stateAfter = state | button;
    } else {
        _clickCount = 1;
        if (type == MouseButtonRelease) {
            _state = state | button;
            _stateAfter = state & ~button;
        } else {
            _state = state & ~button;
            _stateAfter = state | button;
        }
    }
}

QMouseEvent::QMouseEvent(Type type, NSEvent *event)
    : QEvent(type), _position([event locationInWindow])
{
    int button = mouseButtonForEvent(event);
    int state = nonMouseButtonsForEvent(event);
    _button = button;
    if (type == MouseMove) {
        _clickCount = 0;
        _state = state | button;
        _stateAfter = state | button;
    } else {
        _clickCount = [event clickCount];
        if (type == MouseButtonRelease) {
            _state = state | button;
            _stateAfter = state & ~button;
        } else {
            _state = state & ~button;
            _stateAfter = state | button;
        }
    }
}

// ======== 

QKeyEvent::QKeyEvent(NSEvent *event, bool forceAutoRepeat)
    : QEvent([event type] == NSKeyDown ? KeyPress : KeyRelease),
      _state(nonMouseButtonsForEvent(event)),
      _text(QString::fromNSString([event characters])),
      _unmodifiedText(QString::fromNSString([event charactersIgnoringModifiers])),
      _keyIdentifier(keyIdentifierForKeyEvent(event)),
      _autoRepeat(forceAutoRepeat || [event isARepeat]),
      _isAccepted(false),
      _WindowsKeyCode(WindowsKeyCodeForKeyEvent(event))
{
    // Turn 0x7F into 0x08, because backspace needs to always be 0x08.
    if (_text == "\x7F") {
        _text = "\x8";
    }
    if (_unmodifiedText == "\x7F") {
        _unmodifiedText = "\x8";
    }
}
