311 lines
8.2 KiB
Objective-C
311 lines
8.2 KiB
Objective-C
/*
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RDP Keyboard helper
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Copyright 2013 Thincast Technologies GmbH, Author: Martin Fleisz
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This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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If a copy of the MPL was not distributed with this file, You can obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#import "RDPKeyboard.h"
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#include <freerdp/locale/keyboard.h>
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@interface RDPKeyboard (Private)
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- (void)sendVirtualKey:(int)vKey up:(BOOL)up;
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- (void)handleSpecialKey:(int)character;
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- (void)handleAlphaNumChar:(int)character;
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- (void)notifyDelegateModifiersChanged;
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@end
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@implementation RDPKeyboard
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@synthesize delegate = _delegate, ctrlPressed = _ctrl_pressed, altPressed = _alt_pressed,
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shiftPressed = _shift_pressed, winPressed = _win_pressed;
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- (id)init
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{
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if ((self = [super init]) != nil)
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{
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[self initWithSession:nil delegate:nil];
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memset(_virtual_key_map, 0, sizeof(_virtual_key_map));
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memset(_unicode_map, 0, sizeof(_unicode_map));
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// init vkey map - used for alpha-num characters
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_virtual_key_map['0'] = VK_KEY_0;
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_virtual_key_map['1'] = VK_KEY_1;
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_virtual_key_map['2'] = VK_KEY_2;
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_virtual_key_map['3'] = VK_KEY_3;
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_virtual_key_map['4'] = VK_KEY_4;
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_virtual_key_map['5'] = VK_KEY_5;
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_virtual_key_map['6'] = VK_KEY_6;
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_virtual_key_map['7'] = VK_KEY_7;
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_virtual_key_map['8'] = VK_KEY_8;
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_virtual_key_map['9'] = VK_KEY_9;
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_virtual_key_map['a'] = VK_KEY_A;
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_virtual_key_map['b'] = VK_KEY_B;
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_virtual_key_map['c'] = VK_KEY_C;
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_virtual_key_map['d'] = VK_KEY_D;
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_virtual_key_map['e'] = VK_KEY_E;
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_virtual_key_map['f'] = VK_KEY_F;
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_virtual_key_map['g'] = VK_KEY_G;
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_virtual_key_map['h'] = VK_KEY_H;
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_virtual_key_map['i'] = VK_KEY_I;
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_virtual_key_map['j'] = VK_KEY_J;
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_virtual_key_map['k'] = VK_KEY_K;
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_virtual_key_map['l'] = VK_KEY_L;
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_virtual_key_map['m'] = VK_KEY_M;
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_virtual_key_map['n'] = VK_KEY_N;
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_virtual_key_map['o'] = VK_KEY_O;
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_virtual_key_map['p'] = VK_KEY_P;
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_virtual_key_map['q'] = VK_KEY_Q;
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_virtual_key_map['r'] = VK_KEY_R;
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_virtual_key_map['s'] = VK_KEY_S;
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_virtual_key_map['t'] = VK_KEY_T;
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_virtual_key_map['u'] = VK_KEY_U;
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_virtual_key_map['v'] = VK_KEY_V;
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_virtual_key_map['w'] = VK_KEY_W;
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_virtual_key_map['x'] = VK_KEY_X;
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_virtual_key_map['y'] = VK_KEY_Y;
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_virtual_key_map['z'] = VK_KEY_Z;
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// init scancode map - used for special characters
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_unicode_map['-'] = 45;
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_unicode_map['/'] = 47;
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_unicode_map[':'] = 58;
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_unicode_map[';'] = 59;
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_unicode_map['('] = 40;
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_unicode_map[')'] = 41;
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_unicode_map['&'] = 38;
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_unicode_map['@'] = 64;
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_unicode_map['.'] = 46;
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_unicode_map[','] = 44;
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_unicode_map['?'] = 63;
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_unicode_map['!'] = 33;
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_unicode_map['\''] = 39;
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_unicode_map['\"'] = 34;
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_unicode_map['['] = 91;
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_unicode_map[']'] = 93;
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_unicode_map['{'] = 123;
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_unicode_map['}'] = 125;
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_unicode_map['#'] = 35;
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_unicode_map['%'] = 37;
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_unicode_map['^'] = 94;
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_unicode_map['*'] = 42;
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_unicode_map['+'] = 43;
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_unicode_map['='] = 61;
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_unicode_map['_'] = 95;
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_unicode_map['\\'] = 92;
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_unicode_map['|'] = 124;
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_unicode_map['~'] = 126;
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_unicode_map['<'] = 60;
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_unicode_map['>'] = 62;
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_unicode_map['$'] = 36;
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}
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return self;
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}
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- (void)dealloc
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{
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[super dealloc];
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}
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#pragma mark -
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#pragma mark class methods
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// return a keyboard instance
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+ (RDPKeyboard *)getSharedRDPKeyboard
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{
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static RDPKeyboard *_shared_keyboard = nil;
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if (_shared_keyboard == nil)
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{
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@synchronized(self)
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{
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if (_shared_keyboard == nil)
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_shared_keyboard = [[RDPKeyboard alloc] init];
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}
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}
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return _shared_keyboard;
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}
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// reset the keyboard instance and assign the given rdp instance
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- (void)initWithSession:(RDPSession *)session delegate:(NSObject<RDPKeyboardDelegate> *)delegate
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{
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_alt_pressed = NO;
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_ctrl_pressed = NO;
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_shift_pressed = NO;
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_win_pressed = NO;
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_session = session;
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_delegate = delegate;
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}
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- (void)reset
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{
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// reset pressed ctrl, alt, shift or win key
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if (_shift_pressed)
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[self toggleShiftKey];
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if (_alt_pressed)
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[self toggleAltKey];
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if (_ctrl_pressed)
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[self toggleCtrlKey];
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if (_win_pressed)
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[self toggleWinKey];
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}
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// handles button pressed input event from the iOS keyboard
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// performs all conversions etc.
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- (void)sendUnicode:(int)character
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{
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if (isalnum(character))
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[self handleAlphaNumChar:character];
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else
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[self handleSpecialKey:character];
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[self reset];
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}
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// send a backspace key press
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- (void)sendVirtualKeyCode:(int)keyCode
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{
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[self sendVirtualKey:keyCode up:NO];
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[self sendVirtualKey:keyCode up:YES];
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}
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#pragma mark modifier key handling
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// toggle ctrl key, returns true if pressed, otherwise false
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- (void)toggleCtrlKey
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{
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[self sendVirtualKey:VK_LCONTROL up:_ctrl_pressed];
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_ctrl_pressed = !_ctrl_pressed;
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[self notifyDelegateModifiersChanged];
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}
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// toggle alt key, returns true if pressed, otherwise false
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- (void)toggleAltKey
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{
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[self sendVirtualKey:VK_LMENU up:_alt_pressed];
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_alt_pressed = !_alt_pressed;
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[self notifyDelegateModifiersChanged];
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}
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// toggle shift key, returns true if pressed, otherwise false
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- (void)toggleShiftKey
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{
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[self sendVirtualKey:VK_LSHIFT up:_shift_pressed];
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_shift_pressed = !_shift_pressed;
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[self notifyDelegateModifiersChanged];
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}
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// toggle windows key, returns true if pressed, otherwise false
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- (void)toggleWinKey
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{
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[self sendVirtualKey:(VK_LWIN | KBDEXT) up:_win_pressed];
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_win_pressed = !_win_pressed;
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[self notifyDelegateModifiersChanged];
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}
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#pragma mark Sending special key strokes
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- (void)sendEnterKeyStroke
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{
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[self sendVirtualKeyCode:(VK_RETURN | KBDEXT)];
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}
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- (void)sendEscapeKeyStroke
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{
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[self sendVirtualKeyCode:VK_ESCAPE];
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}
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- (void)sendBackspaceKeyStroke
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{
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[self sendVirtualKeyCode:VK_BACK];
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}
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@end
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#pragma mark -
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@implementation RDPKeyboard (Private)
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- (void)handleAlphaNumChar:(int)character
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{
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// if we recive an uppercase letter - make it lower and send an shift down event to server
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BOOL shift_was_sent = NO;
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if (isupper(character) && _shift_pressed == NO)
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{
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character = tolower(character);
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[self sendVirtualKey:VK_LSHIFT up:NO];
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shift_was_sent = YES;
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}
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// convert the character to a VK
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int vk = _virtual_key_map[character];
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if (vk != 0)
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{
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// send key pressed
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[self sendVirtualKey:vk up:NO];
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[self sendVirtualKey:vk up:YES];
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}
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// send the missing shift up if we had a shift down
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if (shift_was_sent)
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[self sendVirtualKey:VK_LSHIFT up:YES];
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}
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- (void)handleSpecialKey:(int)character
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{
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NSDictionary *eventDescriptor = nil;
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if (character < 256)
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{
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// convert the character to a unicode character
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int code = _unicode_map[character];
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if (code != 0)
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eventDescriptor = [NSDictionary
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dictionaryWithObjectsAndKeys:@"keyboard", @"type", @"unicode", @"subtype",
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[NSNumber numberWithUnsignedShort:0], @"flags",
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[NSNumber numberWithUnsignedShort:code],
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@"unicode_char", nil];
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}
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if (eventDescriptor == nil)
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eventDescriptor = [NSDictionary
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dictionaryWithObjectsAndKeys:@"keyboard", @"type", @"unicode", @"subtype",
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[NSNumber numberWithUnsignedShort:0], @"flags",
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[NSNumber numberWithUnsignedShort:character],
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@"unicode_char", nil];
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[_session sendInputEvent:eventDescriptor];
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}
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// sends the vk code to the session
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- (void)sendVirtualKey:(int)vKey up:(BOOL)up
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{
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DWORD scancode = GetVirtualScanCodeFromVirtualKeyCode(vKey, 4);
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int flags = (up ? KBD_FLAGS_RELEASE : KBD_FLAGS_DOWN);
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flags |= ((scancode & KBDEXT) ? KBD_FLAGS_EXTENDED : 0);
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[_session
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sendInputEvent:[NSDictionary
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dictionaryWithObjectsAndKeys:@"keyboard", @"type", @"scancode",
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@"subtype",
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[NSNumber numberWithUnsignedShort:flags],
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@"flags",
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[NSNumber
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numberWithUnsignedShort:(scancode &
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0xFF)],
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@"scancode", nil]];
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}
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- (void)notifyDelegateModifiersChanged
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{
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if ([[self delegate] respondsToSelector:@selector(modifiersChangedForKeyboard:)])
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[[self delegate] modifiersChangedForKeyboard:self];
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}
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@end
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