| Flutter iOS Embedder |

KeyCodeMap_Internal.h
Go to the documentation of this file.
1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_KEYCODEMAP_INTERNAL_H_
6 #define FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_KEYCODEMAP_INTERNAL_H_
7
8 #import <UIKit/UIKit.h>
9 #include <map>
10 #include <set>
11
12 /**
13 * Maps iOS-specific key code values representing |PhysicalKeyboardKey|.
14 *
15 * MacOS doesn't provide a scan code, but a virtual keycode to represent a
16 * physical key.
17 */
18 // NOLINTNEXTLINE(readability-identifier-naming)
19 extern const std::map<uint32_t, uint64_t> keyCodeToPhysicalKey;
20
21 /**
22 * A map from iOS key codes to Flutter's logical key values.
23 *
24 * This is used to derive logical keys that can't or shouldn't be derived from
25 * |charactersIgnoringModifiers|.
26 */
27 // NOLINTNEXTLINE(readability-identifier-naming)
28 extern const std::map<uint32_t, uint64_t> keyCodeToLogicalKey;
29
30 /**
31 * Maps iOS specific string values of nonvisible keys to logical keys.
32 *
33 * TODO(dkwingsmt): Change this getter function to a global variable. I tried to
34 * do this but the unit test on CI threw errors saying "message sent to
35 * deallocated instance" on the NSDictionary.
36 *
37 * See:
38 * https://developer.apple.com/documentation/uikit/uikeycommand/input_strings_for_special_keys?language=objc
39 */
40 extern NSDictionary<NSString*, NSNumber*>* specialKeyMapping;
41
42 // Several mask constants. See KeyCodeMap.g.mm for their descriptions.
43
44 extern const uint64_t kValueMask;
45 extern const uint64_t kUnicodePlane;
46 extern const uint64_t kIosPlane;
47
48 /**
49 * The physical key for CapsLock, which needs special handling.
50 */
51 extern const uint64_t kCapsLockPhysicalKey;
52
53 /**
54 * The logical key for CapsLock, which needs special handling.
55 */
56 extern const uint64_t kCapsLockLogicalKey;
57
58 /**
59 * Bits in |UIKey.modifierFlags| indicating whether a modifier key is pressed.
60 */
61 typedef enum {
62 // These sided flags are not in any official Apple docs, they are derived from
63 // experiments.
64 kModifierFlagControlLeft = 0x1,
65 kModifierFlagShiftLeft = 0x2,
66 kModifierFlagShiftRight = 0x4,
67 kModifierFlagMetaLeft = 0x8,
68 kModifierFlagMetaRight = 0x10,
69 kModifierFlagAltLeft = 0x20,
70 kModifierFlagAltRight = 0x40,
71 kModifierFlagControlRight = 0x2000,
72
73 // These are equivalent to non-sided iOS values.
74 kModifierFlagCapsLock = UIKeyModifierAlphaShift, // 0x010000
75 kModifierFlagShiftAny = UIKeyModifierShift, // 0x020000
76 kModifierFlagControlAny = UIKeyModifierControl, // 0x040000
77 kModifierFlagAltAny = UIKeyModifierAlternate, // 0x080000
78 kModifierFlagMetaAny = UIKeyModifierCommand, // 0x100000
79 kModifierFlagNumPadKey = UIKeyModifierNumericPad // 0x200000
80 } ModifierFlag;
81
82 /**
83 * A mask of all the modifier flags that represent a modifier being pressed, but
84 * not whether it is the left or right modifier.
85 */
86 constexpr uint32_t kModifierFlagAnyMask =
87 kModifierFlagShiftAny | kModifierFlagControlAny | kModifierFlagAltAny | kModifierFlagMetaAny;
88
89 /**
90 * A mask of the modifier flags that represent only left or right modifier
91 * keys, and not the generic "Any" mask.
92 */
93 constexpr uint32_t kModifierFlagSidedMask = kModifierFlagControlLeft | kModifierFlagShiftLeft |
94 kModifierFlagShiftRight | kModifierFlagMetaLeft |
95 kModifierFlagMetaRight | kModifierFlagAltLeft |
96 kModifierFlagAltRight | kModifierFlagControlRight;
97
98 /**
99 * Map |UIKey.keyCode| to the matching sided modifier in UIEventModifierFlags.
100 */
101 // NOLINTNEXTLINE(readability-identifier-naming)
102 extern const std::map<uint32_t, ModifierFlag> keyCodeToModifierFlag;
103
104 /**
105 * Map a bit of bitmask of sided modifiers in UIEventModifierFlags to their
106 * corresponding |UIKey.keyCode|.
107 */
108 // NOLINTNEXTLINE(readability-identifier-naming)
109 extern const std::map<ModifierFlag, uint32_t> modifierFlagToKeyCode;
110
111 /**
112 * Maps a sided modifier key to the corresponding flag matching either side of
113 * that type of modifier.
114 */
115 // NOLINTNEXTLINE(readability-identifier-naming)
116 extern const std::map<ModifierFlag, ModifierFlag> sidedModifierToAny;
117
118 /**
119 * Maps a non-sided modifier key to the corresponding flag matching the left key
120 * of that type of modifier.
121 */
122 // NOLINTNEXTLINE(readability-identifier-naming)
123 extern const std::map<ModifierFlag, ModifierFlag> anyModifierToLeft;
124
125 /**
126 * A set of keycodes corresponding to function keys.
127 */
128 // NOLINTNEXTLINE(readability-identifier-naming)
129 extern const std::set<uint32_t> functionKeyCodes;
130
131 #endif // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_KEYCODEMAP_INTERNAL_H_
keyCodeToModifierFlag
const std::map< uint32_t, ModifierFlag > keyCodeToModifierFlag
Definition: KeyCodeMap.g.mm:279
ModifierFlag
ModifierFlag
Definition: KeyCodeMap_Internal.h:61
kModifierFlagCapsLock
@ kModifierFlagCapsLock
Definition: KeyCodeMap_Internal.h:74
kModifierFlagNumPadKey
@ kModifierFlagNumPadKey
Definition: KeyCodeMap_Internal.h:79
kModifierFlagControlLeft
@ kModifierFlagControlLeft
Definition: KeyCodeMap_Internal.h:64
kModifierFlagAltRight
@ kModifierFlagAltRight
Definition: KeyCodeMap_Internal.h:70
kModifierFlagShiftAny
@ kModifierFlagShiftAny
Definition: KeyCodeMap_Internal.h:75
kModifierFlagControlRight
@ kModifierFlagControlRight
Definition: KeyCodeMap_Internal.h:71
kModifierFlagMetaAny
@ kModifierFlagMetaAny
Definition: KeyCodeMap_Internal.h:78
kModifierFlagMetaRight
@ kModifierFlagMetaRight
Definition: KeyCodeMap_Internal.h:68
kModifierFlagShiftLeft
@ kModifierFlagShiftLeft
Definition: KeyCodeMap_Internal.h:65
kModifierFlagShiftRight
@ kModifierFlagShiftRight
Definition: KeyCodeMap_Internal.h:66
kModifierFlagControlAny
@ kModifierFlagControlAny
Definition: KeyCodeMap_Internal.h:76
kModifierFlagAltLeft
@ kModifierFlagAltLeft
Definition: KeyCodeMap_Internal.h:69
kModifierFlagMetaLeft
@ kModifierFlagMetaLeft
Definition: KeyCodeMap_Internal.h:67
kModifierFlagAltAny
@ kModifierFlagAltAny
Definition: KeyCodeMap_Internal.h:77
sidedModifierToAny
const std::map< ModifierFlag, ModifierFlag > sidedModifierToAny
functionKeyCodes
const std::set< uint32_t > functionKeyCodes
Definition: KeyCodeMap.g.mm:304
kValueMask
const uint64_t kValueMask
Definition: KeyCodeMap.g.mm:22
keyCodeToPhysicalKey
const std::map< uint32_t, uint64_t > keyCodeToPhysicalKey
Definition: KeyCodeMap.g.mm:37
kModifierFlagAnyMask
constexpr uint32_t kModifierFlagAnyMask
Definition: KeyCodeMap_Internal.h:86
specialKeyMapping
NSDictionary< NSString *, NSNumber * > * specialKeyMapping
Definition: KeyCodeMap.g.mm:332
kUnicodePlane
const uint64_t kUnicodePlane
Definition: KeyCodeMap.g.mm:27
keyCodeToLogicalKey
const std::map< uint32_t, uint64_t > keyCodeToLogicalKey
Definition: KeyCodeMap.g.mm:201
kCapsLockLogicalKey
const uint64_t kCapsLockLogicalKey
Definition: KeyCodeMap.g.mm:357
kCapsLockPhysicalKey
const uint64_t kCapsLockPhysicalKey
Definition: KeyCodeMap.g.mm:356
modifierFlagToKeyCode
const std::map< ModifierFlag, uint32_t > modifierFlagToKeyCode
Definition: KeyCodeMap.g.mm:291
kIosPlane
const uint64_t kIosPlane
Definition: KeyCodeMap.g.mm:32
anyModifierToLeft
const std::map< ModifierFlag, ModifierFlag > anyModifierToLeft
kModifierFlagSidedMask
constexpr uint32_t kModifierFlagSidedMask
Definition: KeyCodeMap_Internal.h:93