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barrier/lib/platform/COSXKeyState.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "COSXKeyState.h"
#include "CLog.h"
#include "CArch.h"
// Hardcoded virtual key table. Oddly, Apple doesn't document the
// meaning of virtual key codes. The whole point of *virtual* key
// codes is to make them hardware independent so these codes should
// be constant across OS versions and hardware. Yet they don't
// tell us what codes map to what keys so we have to figure it out
// for ourselves.
//
// Note that some virtual keys codes appear more than once. The
// first instance of a virtual key code maps to the KeyID that we
// want to generate for that code. The others are for mapping
// different KeyIDs to a single key code.
static const UInt32 s_shiftVK = 56;
static const UInt32 s_controlVK = 59;
static const UInt32 s_altVK = 58;
static const UInt32 s_superVK = 55;
static const UInt32 s_capsLockVK = 57;
static const UInt32 s_numLockVK = 71;
static const UInt32 s_osxNumLock = 1 << 16;
struct CKeyEntry {
public:
KeyID m_keyID;
UInt32 m_virtualKey;
};
static const CKeyEntry s_controlKeys[] = {
// cursor keys. if we don't do this we'll may still get these from
// the keyboard resource but they may not correspond to the arrow
// keys.
{ kKeyLeft, 123 },
{ kKeyRight, 124 },
{ kKeyUp, 126 },
{ kKeyDown, 125 },
{ kKeyHome, 115 },
{ kKeyEnd, 119 },
{ kKeyPageUp, 116 },
{ kKeyPageDown, 121 },
// function keys
{ kKeyF1, 122 },
{ kKeyF2, 120 },
{ kKeyF3, 99 },
{ kKeyF4, 118 },
{ kKeyF5, 96 },
{ kKeyF6, 97 },
{ kKeyF7, 98 },
{ kKeyF8, 100 },
{ kKeyF9, 101 },
{ kKeyF10, 109 },
{ kKeyF11, 103 },
{ kKeyF12, 111 },
{ kKeyF13, 105 },
{ kKeyF14, 107 },
{ kKeyF15, 113 },
{ kKeyF16, 106 },
{ kKeyKP_0, 82 },
{ kKeyKP_1, 83 },
{ kKeyKP_2, 84 },
{ kKeyKP_3, 85 },
{ kKeyKP_4, 86 },
{ kKeyKP_5, 87 },
{ kKeyKP_6, 88 },
{ kKeyKP_7, 89 },
{ kKeyKP_8, 91 },
{ kKeyKP_9, 92 },
{ kKeyKP_Decimal, 65 },
{ kKeyKP_Equal, 81 },
{ kKeyKP_Multiply, 67 },
{ kKeyKP_Add, 69 },
{ kKeyKP_Divide, 75 },
{ kKeyKP_Subtract, 79 },
{ kKeyKP_Enter, 76 },
// virtual key 110 is fn+enter and i have no idea what that's supposed
// to map to. also the enter key with numlock on is a modifier but i
// don't know which.
// modifier keys. OS X doesn't seem to support right handed versions
// of modifier keys so we map them to the left handed versions.
{ kKeyShift_L, s_shiftVK },
{ kKeyShift_R, s_shiftVK }, // 60
{ kKeyControl_L, s_controlVK },
{ kKeyControl_R, s_controlVK }, // 62
{ kKeyAlt_L, s_altVK },
{ kKeyAlt_R, s_altVK },
{ kKeySuper_L, s_superVK },
{ kKeySuper_R, s_superVK }, // 61
{ kKeyMeta_L, s_superVK },
{ kKeyMeta_R, s_superVK }, // 61
// toggle modifiers
{ kKeyNumLock, s_numLockVK },
{ kKeyCapsLock, s_capsLockVK }
};
//
// COSXKeyState
//
COSXKeyState::COSXKeyState() :
m_deadKeyState(0)
{
// build virtual key map
for (size_t i = 0; i < sizeof(s_controlKeys) /
sizeof(s_controlKeys[0]); ++i) {
m_virtualKeyMap[s_controlKeys[i].m_virtualKey] =
s_controlKeys[i].m_keyID;
}
}
COSXKeyState::~COSXKeyState()
{
// do nothing
}
KeyModifierMask
COSXKeyState::mapModifiersFromOSX(UInt32 mask) const
{
LOG((CLOG_DEBUG1 "mask: %04x", mask));
// convert
KeyModifierMask outMask = 0;
if ((mask & kCGEventFlagMaskShift) != 0) {
outMask |= KeyModifierShift;
}
if ((mask & kCGEventFlagMaskControl) != 0) {
outMask |= KeyModifierControl;
}
if ((mask & kCGEventFlagMaskAlternate) != 0) {
outMask |= KeyModifierAlt;
}
if ((mask & kCGEventFlagMaskCommand) != 0) {
outMask |= KeyModifierSuper;
}
if ((mask & kCGEventFlagMaskAlphaShift) != 0) {
outMask |= KeyModifierCapsLock;
}
if ((mask & kCGEventFlagMaskNumericPad) != 0) {
outMask |= KeyModifierNumLock;
}
return outMask;
}
KeyModifierMask
COSXKeyState::mapModifiersToCarbon(UInt32 mask) const
{
KeyModifierMask outMask = 0;
if ((mask & kCGEventFlagMaskShift) != 0) {
outMask |= shiftKey;
}
if ((mask & kCGEventFlagMaskControl) != 0) {
outMask |= controlKey;
}
if ((mask & kCGEventFlagMaskCommand) != 0) {
outMask |= cmdKey;
}
if ((mask & kCGEventFlagMaskAlternate) != 0) {
outMask |= optionKey;
}
if ((mask & kCGEventFlagMaskAlphaShift) != 0) {
outMask |= alphaLock;
}
if ((mask & kCGEventFlagMaskNumericPad) != 0) {
outMask |= s_osxNumLock;
}
return outMask;
}
KeyButton
COSXKeyState::mapKeyFromEvent(CKeyIDs& ids,
KeyModifierMask* maskOut, CGEventRef event) const
{
ids.clear();
// map modifier key
if (maskOut != NULL) {
KeyModifierMask activeMask = getActiveModifiers();
activeMask &= ~KeyModifierAltGr;
*maskOut = activeMask;
}
// get virtual key
UInt32 vkCode = CGEventGetIntegerValueField(event, kCGKeyboardEventKeycode);
// handle up events
UInt32 eventKind = CGEventGetType(event);
if (eventKind == kCGEventKeyUp) {
// the id isn't used. we just need the same button we used on
// the key press. note that we don't use or reset the dead key
// state; up events should not affect the dead key state.
ids.push_back(kKeyNone);
return mapVirtualKeyToKeyButton(vkCode);
}
// check for special keys
CVirtualKeyMap::const_iterator i = m_virtualKeyMap.find(vkCode);
if (i != m_virtualKeyMap.end()) {
m_deadKeyState = 0;
ids.push_back(i->second);
return mapVirtualKeyToKeyButton(vkCode);
}
// get keyboard info
TISInputSourceRef currentKeyboardLayout = TISCopyCurrentKeyboardLayoutInputSource();
if (currentKeyboardLayout == NULL) {
return kKeyNone;
}
// get the event modifiers and remove the command and control
// keys. note if we used them though.
// UCKeyTranslate expects old-style Carbon modifiers, so convert.
UInt32 modifiers;
modifiers = mapModifiersToCarbon(CGEventGetFlags(event));
static const UInt32 s_commandModifiers =
cmdKey | controlKey | rightControlKey;
bool isCommand = ((modifiers & s_commandModifiers) != 0);
modifiers &= ~s_commandModifiers;
// if we've used a command key then we want the glyph produced without
// the option key (i.e. the base glyph).
//if (isCommand) {
modifiers &= ~optionKey;
//}
// choose action
UInt16 action;
if(eventKind==kCGEventKeyDown) {
action = kUCKeyActionDown;
}
else if(CGEventGetIntegerValueField(event, kCGKeyboardEventAutorepeat)==1) {
action = kUCKeyActionAutoKey;
}
else {
return 0;
}
// translate via uchr resource
CFDataRef ref = (CFDataRef) TISGetInputSourceProperty(currentKeyboardLayout,
kTISPropertyUnicodeKeyLayoutData);
const UCKeyboardLayout* layout = (const UCKeyboardLayout*) CFDataGetBytePtr(ref);
if (layout != NULL) {
// translate key
UniCharCount count;
UniChar chars[2];
//LOG((CLOG_DEBUG "modifiers: %08x", modifiers & 0xffu));
OSStatus status = UCKeyTranslate(layout,
vkCode & 0xffu, action,
(modifiers >> 8) & 0xffu,
LMGetKbdType(), 0, &m_deadKeyState,
sizeof(chars) / sizeof(chars[0]), &count, chars);
// get the characters
if (status == 0) {
if (count != 0 || m_deadKeyState == 0) {
m_deadKeyState = 0;
for (UniCharCount i = 0; i < count; ++i) {
ids.push_back(CKeyResource::unicharToKeyID(chars[i]));
}
adjustAltGrModifier(ids, maskOut, isCommand);
return mapVirtualKeyToKeyButton(vkCode);
}
return 0;
}
}
return 0;
}
bool
COSXKeyState::fakeCtrlAltDel()
{
// pass keys through unchanged
return false;
}
KeyModifierMask
COSXKeyState::pollActiveModifiers() const
{
return mapModifiersFromOSX(GetCurrentKeyModifiers());
}
SInt32
COSXKeyState::pollActiveGroup() const
{
TISInputSourceRef inputSource = TISCopyCurrentKeyboardLayoutInputSource();
GroupMap::const_iterator i = m_groupMap.find(inputSource);
if (i != m_groupMap.end()) {
return i->second;
}
return 0;
}
void
COSXKeyState::pollPressedKeys(KeyButtonSet& pressedKeys) const
{
KeyMap km;
GetKeys(km);
const UInt8* m = reinterpret_cast<const UInt8*>(km);
for (UInt32 i = 0; i < 16; ++i) {
for (UInt32 j = 0; j < 8; ++j) {
if ((m[i] & (1u << j)) != 0) {
pressedKeys.insert(mapVirtualKeyToKeyButton(8 * i + j));
}
}
}
}
void
COSXKeyState::getKeyMap(CKeyMap& keyMap)
{
// update keyboard groups
if (getGroups(m_groups)) {
m_groupMap.clear();
SInt32 numGroups = (SInt32)m_groups.size();
for (SInt32 g = 0; g < numGroups; ++g) {
m_groupMap[m_groups[g]] = g;
}
}
UInt32 keyboardType = LMGetKbdType();
for (SInt32 g = 0, n = (SInt32)m_groups.size(); g < n; ++g) {
// add special keys
getKeyMapForSpecialKeys(keyMap, g);
CFDataRef resource_ref;
if ((resource_ref = (CFDataRef)TISGetInputSourceProperty(m_groups[g],
kTISPropertyUnicodeKeyLayoutData)) != NULL) {
const void* resource = CFDataGetBytePtr(resource_ref);
CUCHRKeyResource uchr(resource, keyboardType);
if (uchr.isValid()) {
LOG((CLOG_DEBUG1 "using uchr resource for group %d", g));
getKeyMap(keyMap, g, uchr);
continue;
}
}
LOG((CLOG_DEBUG1 "no keyboard resource for group %d", g));
}
}
void
COSXKeyState::fakeKey(const Keystroke& keystroke)
{
CGEventRef ref;
switch (keystroke.m_type) {
case Keystroke::kButton:
{
LOG((CLOG_DEBUG1 " %03x (%08x) %s", keystroke.m_data.m_button.m_button, keystroke.m_data.m_button.m_client, keystroke.m_data.m_button.m_press ? "down" : "up"));
// let system figure out character for us
ref = CGEventCreateKeyboardEvent(0, mapKeyButtonToVirtualKey(
keystroke.m_data.m_button.m_button),
keystroke.m_data.m_button.m_press);
if (ref == NULL) {
LOG((CLOG_CRIT "unable to create keyboard event for keystroke"));
}
CGEventPost(kCGHIDEventTap, ref);
// add a delay if client data isn't zero
if (keystroke.m_data.m_button.m_client) {
ARCH->sleep(0.01);
}
}
break;
case Keystroke::kGroup:
if (keystroke.m_data.m_group.m_absolute) {
LOG((CLOG_DEBUG1 " group %d", keystroke.m_data.m_group.m_group));
setGroup(keystroke.m_data.m_group.m_group);
}
else {
LOG((CLOG_DEBUG1 " group %+d", keystroke.m_data.m_group.m_group));
setGroup(getEffectiveGroup(pollActiveGroup(),
keystroke.m_data.m_group.m_group));
}
break;
}
}
void
COSXKeyState::getKeyMapForSpecialKeys(CKeyMap& keyMap, SInt32 group) const
{
// special keys are insensitive to modifers and none are dead keys
CKeyMap::KeyItem item;
for (size_t i = 0; i < sizeof(s_controlKeys) /
sizeof(s_controlKeys[0]); ++i) {
const CKeyEntry& entry = s_controlKeys[i];
item.m_id = entry.m_keyID;
item.m_group = group;
item.m_button = mapVirtualKeyToKeyButton(entry.m_virtualKey);
item.m_required = 0;
item.m_sensitive = 0;
item.m_dead = false;
item.m_client = 0;
CKeyMap::initModifierKey(item);
keyMap.addKeyEntry(item);
if (item.m_lock) {
// all locking keys are half duplex on OS X
keyMap.addHalfDuplexButton(item.m_button);
}
}
// note: we don't special case the number pad keys. querying the
// mac keyboard returns the non-keypad version of those keys but
// a CKeyState always provides a mapping from keypad keys to
// non-keypad keys so we'll be able to generate the characters
// anyway.
}
bool
COSXKeyState::getKeyMap(CKeyMap& keyMap,
SInt32 group, const CKeyResource& r) const
{
if (!r.isValid()) {
return false;
}
// space for all possible modifier combinations
std::vector<bool> modifiers(r.getNumModifierCombinations());
// make space for the keys that any single button can synthesize
std::vector<std::pair<KeyID, bool> > buttonKeys(r.getNumTables());
// iterate over each button
CKeyMap::KeyItem item;
for (UInt32 i = 0; i < r.getNumButtons(); ++i) {
item.m_button = mapVirtualKeyToKeyButton(i);
// the KeyIDs we've already handled
std::set<KeyID> keys;
// convert the entry in each table for this button to a KeyID
for (UInt32 j = 0; j < r.getNumTables(); ++j) {
buttonKeys[j].first = r.getKey(j, i);
buttonKeys[j].second = CKeyMap::isDeadKey(buttonKeys[j].first);
}
// iterate over each character table
for (UInt32 j = 0; j < r.getNumTables(); ++j) {
// get the KeyID for the button/table
KeyID id = buttonKeys[j].first;
if (id == kKeyNone) {
continue;
}
// if we've already handled the KeyID in the table then
// move on to the next table
if (keys.count(id) > 0) {
continue;
}
keys.insert(id);
// prepare item. the client state is 1 for dead keys.
item.m_id = id;
item.m_group = group;
item.m_dead = buttonKeys[j].second;
item.m_client = buttonKeys[j].second ? 1 : 0;
CKeyMap::initModifierKey(item);
if (item.m_lock) {
// all locking keys are half duplex on OS X
keyMap.addHalfDuplexButton(i);
}
// collect the tables that map to the same KeyID. we know it
// can't be any earlier tables because of the check above.
std::set<UInt8> tables;
tables.insert(static_cast<UInt8>(j));
for (UInt32 k = j + 1; k < r.getNumTables(); ++k) {
if (buttonKeys[k].first == id) {
tables.insert(static_cast<UInt8>(k));
}
}
// collect the modifier combinations that map to any of the
// tables we just collected
for (UInt32 k = 0; k < r.getNumModifierCombinations(); ++k) {
modifiers[k] = (tables.count(r.getTableForModifier(k)) > 0);
}
// figure out which modifiers the key is sensitive to. the
// key is insensitive to a modifier if for every modifier mask
// with the modifier bit unset in the modifiers we also find
// the same mask with the bit set.
//
// we ignore a few modifiers that we know aren't important
// for generating characters. in fact, we want to ignore any
// characters generated by the control key. we don't map
// those and instead expect the control modifier plus a key.
UInt32 sensitive = 0;
for (UInt32 k = 0; (1u << k) <
r.getNumModifierCombinations(); ++k) {
UInt32 bit = (1u << k);
if ((bit << 8) == cmdKey ||
(bit << 8) == controlKey ||
(bit << 8) == rightControlKey) {
continue;
}
for (UInt32 m = 0; m < r.getNumModifierCombinations(); ++m) {
if (modifiers[m] != modifiers[m ^ bit]) {
sensitive |= bit;
break;
}
}
}
// find each required modifier mask. the key can be synthesized
// using any of the masks.
std::set<UInt32> required;
for (UInt32 k = 0; k < r.getNumModifierCombinations(); ++k) {
if ((k & sensitive) == k && modifiers[k & sensitive]) {
required.insert(k);
}
}
// now add a key entry for each key/required modifier pair.
item.m_sensitive = mapModifiersFromOSX(sensitive << 8);
for (std::set<UInt32>::iterator k = required.begin();
k != required.end(); ++k) {
item.m_required = mapModifiersFromOSX(*k << 8);
keyMap.addKeyEntry(item);
}
}
}
return true;
}
bool
COSXKeyState::mapSynergyHotKeyToMac(KeyID key, KeyModifierMask mask,
UInt32 &macVirtualKey, UInt32 &macModifierMask) const
{
// look up button for key
KeyButton button = getButton(key, pollActiveGroup());
if (button == 0 && key != kKeyNone) {
return false;
}
macVirtualKey = mapKeyButtonToVirtualKey(button);
// calculate modifier mask
macModifierMask = 0;
if ((mask & KeyModifierShift) != 0) {
macModifierMask |= shiftKey;
}
if ((mask & KeyModifierControl) != 0) {
macModifierMask |= controlKey;
}
if ((mask & KeyModifierAlt) != 0) {
macModifierMask |= cmdKey;
}
if ((mask & KeyModifierSuper) != 0) {
macModifierMask |= optionKey;
}
if ((mask & KeyModifierCapsLock) != 0) {
macModifierMask |= alphaLock;
}
if ((mask & KeyModifierNumLock) != 0) {
macModifierMask |= s_osxNumLock;
}
return true;
}
void
COSXKeyState::handleModifierKeys(void* target,
KeyModifierMask oldMask, KeyModifierMask newMask)
{
// compute changed modifiers
KeyModifierMask changed = (oldMask ^ newMask);
// synthesize changed modifier keys
if ((changed & KeyModifierShift) != 0) {
handleModifierKey(target, s_shiftVK, kKeyShift_L,
(newMask & KeyModifierShift) != 0, newMask);
}
if ((changed & KeyModifierControl) != 0) {
handleModifierKey(target, s_controlVK, kKeyControl_L,
(newMask & KeyModifierControl) != 0, newMask);
}
if ((changed & KeyModifierAlt) != 0) {
handleModifierKey(target, s_altVK, kKeyAlt_L,
(newMask & KeyModifierAlt) != 0, newMask);
}
if ((changed & KeyModifierSuper) != 0) {
handleModifierKey(target, s_superVK, kKeySuper_L,
(newMask & KeyModifierSuper) != 0, newMask);
}
if ((changed & KeyModifierCapsLock) != 0) {
handleModifierKey(target, s_capsLockVK, kKeyCapsLock,
(newMask & KeyModifierCapsLock) != 0, newMask);
}
if ((changed & KeyModifierNumLock) != 0) {
handleModifierKey(target, s_numLockVK, kKeyNumLock,
(newMask & KeyModifierNumLock) != 0, newMask);
}
}
void
COSXKeyState::handleModifierKey(void* target,
UInt32 virtualKey, KeyID id,
bool down, KeyModifierMask newMask)
{
KeyButton button = mapVirtualKeyToKeyButton(virtualKey);
onKey(button, down, newMask);
sendKeyEvent(target, down, false, id, newMask, 0, button);
}
bool
COSXKeyState::getGroups(GroupList& groups) const
{
// get number of layouts
CFStringRef keys[] = { kTISPropertyInputSourceCategory };
CFStringRef values[] = { kTISCategoryKeyboardInputSource };
CFDictionaryRef dict = CFDictionaryCreate(NULL, (const void **)keys, (const void **)values, 1, NULL, NULL);
CFArrayRef kbds = TISCreateInputSourceList(dict, false);
CFIndex n = CFArrayGetCount(kbds);
if (n == 0) {
LOG((CLOG_DEBUG1 "can't get keyboard layouts"));
return false;
}
// get each layout
groups.clear();
TISInputSourceRef inputKeyboardLayout;
for (CFIndex i = 0; i < n; ++i) {
inputKeyboardLayout = (TISInputSourceRef) CFArrayGetValueAtIndex(kbds, i);
groups.push_back(inputKeyboardLayout);
}
return true;
}
void
COSXKeyState::setGroup(SInt32 group)
{
TISSetInputMethodKeyboardLayoutOverride(m_groups[group]);
}
void
COSXKeyState::checkKeyboardLayout()
{
// XXX -- should call this when notified that groups have changed.
// if no notification for that then we should poll.
GroupList groups;
if (getGroups(groups) && groups != m_groups) {
updateKeyMap();
updateKeyState();
}
}
void
COSXKeyState::adjustAltGrModifier(const CKeyIDs& ids,
KeyModifierMask* mask, bool isCommand) const
{
if (!isCommand) {
for (CKeyIDs::const_iterator i = ids.begin(); i != ids.end(); ++i) {
KeyID id = *i;
if (id != kKeyNone &&
((id < 0xe000u || id > 0xefffu) ||
(id >= kKeyKP_Equal && id <= kKeyKP_9))) {
*mask |= KeyModifierAltGr;
return;
}
}
}
}
KeyButton
COSXKeyState::mapVirtualKeyToKeyButton(UInt32 keyCode)
{
// 'A' maps to 0 so shift every id
return static_cast<KeyButton>(keyCode + KeyButtonOffset);
}
UInt32
COSXKeyState::mapKeyButtonToVirtualKey(KeyButton keyButton)
{
return static_cast<UInt32>(keyButton - KeyButtonOffset);
}
//
// COSXKeyState::CKeyResource
//
KeyID
COSXKeyState::CKeyResource::getKeyID(UInt8 c)
{
if (c == 0) {
return kKeyNone;
}
else if (c >= 32 && c < 127) {
// ASCII
return static_cast<KeyID>(c);
}
else {
// handle special keys
switch (c) {
case 0x01:
return kKeyHome;
case 0x02:
return kKeyKP_Enter;
case 0x03:
return kKeyKP_Enter;
case 0x04:
return kKeyEnd;
case 0x05:
return kKeyHelp;
case 0x08:
return kKeyBackSpace;
case 0x09:
return kKeyTab;
case 0x0b:
return kKeyPageUp;
case 0x0c:
return kKeyPageDown;
case 0x0d:
return kKeyReturn;
case 0x10:
// OS X maps all the function keys (F1, etc) to this one key.
// we can't determine the right key here so we have to do it
// some other way.
return kKeyNone;
case 0x1b:
return kKeyEscape;
case 0x1c:
return kKeyLeft;
case 0x1d:
return kKeyRight;
case 0x1e:
return kKeyUp;
case 0x1f:
return kKeyDown;
case 0x7f:
return kKeyDelete;
case 0x06:
case 0x07:
case 0x0a:
case 0x0e:
case 0x0f:
case 0x11:
case 0x12:
case 0x13:
case 0x14:
case 0x15:
case 0x16:
case 0x17:
case 0x18:
case 0x19:
case 0x1a:
// discard other control characters
return kKeyNone;
default:
// not special or unknown
break;
}
// create string with character
char str[2];
str[0] = static_cast<char>(c);
str[1] = 0;
// get current keyboard script
TISInputSourceRef isref = TISCopyCurrentKeyboardInputSource();
CFArrayRef langs = (CFArrayRef) TISGetInputSourceProperty(isref, kTISPropertyInputSourceLanguages);
// convert to unicode
CFStringRef cfString =
CFStringCreateWithCStringNoCopy(kCFAllocatorDefault,
str, CFStringConvertIANACharSetNameToEncoding((CFStringRef) CFArrayGetValueAtIndex(langs, 0)),
kCFAllocatorNull);
// sometimes CFStringCreate...() returns NULL (e.g. Apple Korean
// encoding with char value 214). if it did then make no key,
// otherwise CFStringCreateMutableCopy() will crash.
if (cfString == NULL) {
return kKeyNone;
}
// convert to precomposed
CFMutableStringRef mcfString =
CFStringCreateMutableCopy(kCFAllocatorDefault, 0, cfString);
CFRelease(cfString);
CFStringNormalize(mcfString, kCFStringNormalizationFormC);
// check result
int unicodeLength = CFStringGetLength(mcfString);
if (unicodeLength == 0) {
CFRelease(mcfString);
return kKeyNone;
}
if (unicodeLength > 1) {
// FIXME -- more than one character, we should handle this
CFRelease(mcfString);
return kKeyNone;
}
// get unicode character
UniChar uc = CFStringGetCharacterAtIndex(mcfString, 0);
CFRelease(mcfString);
// convert to KeyID
return static_cast<KeyID>(uc);
}
}
KeyID
COSXKeyState::CKeyResource::unicharToKeyID(UniChar c)
{
switch (c) {
case 3:
return kKeyKP_Enter;
case 8:
return kKeyBackSpace;
case 9:
return kKeyTab;
case 13:
return kKeyReturn;
case 27:
return kKeyEscape;
case 127:
return kKeyDelete;
default:
if (c < 32) {
return kKeyNone;
}
return static_cast<KeyID>(c);
}
}
//
// COSXKeyState::CUCHRKeyResource
//
COSXKeyState::CUCHRKeyResource::CUCHRKeyResource(const void* resource,
UInt32 keyboardType) :
m_m(NULL),
m_cti(NULL),
m_sdi(NULL),
m_sri(NULL),
m_st(NULL)
{
m_resource = reinterpret_cast<const UCKeyboardLayout*>(resource);
if (m_resource == NULL) {
return;
}
// find the keyboard info for the current keyboard type
const UCKeyboardTypeHeader* th = NULL;
const UCKeyboardLayout* r = m_resource;
for (ItemCount i = 0; i < r->keyboardTypeCount; ++i) {
if (keyboardType >= r->keyboardTypeList[i].keyboardTypeFirst &&
keyboardType <= r->keyboardTypeList[i].keyboardTypeLast) {
th = r->keyboardTypeList + i;
break;
}
if (r->keyboardTypeList[i].keyboardTypeFirst == 0) {
// found the default. use it unless we find a match.
th = r->keyboardTypeList + i;
}
}
if (th == NULL) {
// cannot find a suitable keyboard type
return;
}
// get tables for keyboard type
const UInt8* base = reinterpret_cast<const UInt8*>(m_resource);
m_m = reinterpret_cast<const UCKeyModifiersToTableNum*>(base +
th->keyModifiersToTableNumOffset);
m_cti = reinterpret_cast<const UCKeyToCharTableIndex*>(base +
th->keyToCharTableIndexOffset);
m_sdi = reinterpret_cast<const UCKeySequenceDataIndex*>(base +
th->keySequenceDataIndexOffset);
if (th->keyStateRecordsIndexOffset != 0) {
m_sri = reinterpret_cast<const UCKeyStateRecordsIndex*>(base +
th->keyStateRecordsIndexOffset);
}
if (th->keyStateTerminatorsOffset != 0) {
m_st = reinterpret_cast<const UCKeyStateTerminators*>(base +
th->keyStateTerminatorsOffset);
}
// find the space key, but only if it can combine with dead keys.
// a dead key followed by a space yields the non-dead version of
// the dead key.
m_spaceOutput = 0xffffu;
UInt32 table = getTableForModifier(0);
for (UInt32 button = 0, n = getNumButtons(); button < n; ++button) {
KeyID id = getKey(table, button);
if (id == 0x20) {
UCKeyOutput c =
reinterpret_cast<const UCKeyOutput*>(base +
m_cti->keyToCharTableOffsets[table])[button];
if ((c & kUCKeyOutputTestForIndexMask) ==
kUCKeyOutputStateIndexMask) {
m_spaceOutput = (c & kUCKeyOutputGetIndexMask);
break;
}
}
}
}
bool
COSXKeyState::CUCHRKeyResource::isValid() const
{
return (m_m != NULL);
}
UInt32
COSXKeyState::CUCHRKeyResource::getNumModifierCombinations() const
{
// only 32 (not 256) because the righthanded modifier bits are ignored
return 32;
}
UInt32
COSXKeyState::CUCHRKeyResource::getNumTables() const
{
return m_cti->keyToCharTableCount;
}
UInt32
COSXKeyState::CUCHRKeyResource::getNumButtons() const
{
return m_cti->keyToCharTableSize;
}
UInt32
COSXKeyState::CUCHRKeyResource::getTableForModifier(UInt32 mask) const
{
if (mask >= m_m->modifiersCount) {
return m_m->defaultTableNum;
}
else {
return m_m->tableNum[mask];
}
}
KeyID
COSXKeyState::CUCHRKeyResource::getKey(UInt32 table, UInt32 button) const
{
assert(table < getNumTables());
assert(button < getNumButtons());
const UInt8* base = reinterpret_cast<const UInt8*>(m_resource);
const UCKeyOutput* cPtr = reinterpret_cast<const UCKeyOutput*>(base +
m_cti->keyToCharTableOffsets[table]);
const UCKeyOutput c = cPtr[button];
KeySequence keys;
switch (c & kUCKeyOutputTestForIndexMask) {
case kUCKeyOutputStateIndexMask:
if (!getDeadKey(keys, c & kUCKeyOutputGetIndexMask)) {
return kKeyNone;
}
break;
case kUCKeyOutputSequenceIndexMask:
default:
if (!addSequence(keys, c)) {
return kKeyNone;
}
break;
}
// XXX -- no support for multiple characters
if (keys.size() != 1) {
return kKeyNone;
}
return keys.front();
}
bool
COSXKeyState::CUCHRKeyResource::getDeadKey(
KeySequence& keys, UInt16 index) const
{
if (m_sri == NULL || index >= m_sri->keyStateRecordCount) {
// XXX -- should we be using some other fallback?
return false;
}
UInt16 state = 0;
if (!getKeyRecord(keys, index, state)) {
return false;
}
if (state == 0) {
// not a dead key
return true;
}
// no dead keys if we couldn't find the space key
if (m_spaceOutput == 0xffffu) {
return false;
}
// the dead key should not have put anything in the key list
if (!keys.empty()) {
return false;
}
// get the character generated by pressing the space key after the
// dead key. if we're still in a compose state afterwards then we're
// confused so we bail.
if (!getKeyRecord(keys, m_spaceOutput, state) || state != 0) {
return false;
}
// convert keys to their dead counterparts
for (KeySequence::iterator i = keys.begin(); i != keys.end(); ++i) {
*i = CKeyMap::getDeadKey(*i);
}
return true;
}
bool
COSXKeyState::CUCHRKeyResource::getKeyRecord(
KeySequence& keys, UInt16 index, UInt16& state) const
{
const UInt8* base = reinterpret_cast<const UInt8*>(m_resource);
const UCKeyStateRecord* sr =
reinterpret_cast<const UCKeyStateRecord*>(base +
m_sri->keyStateRecordOffsets[index]);
const UCKeyStateEntryTerminal* kset =
reinterpret_cast<const UCKeyStateEntryTerminal*>(sr->stateEntryData);
UInt16 nextState = 0;
bool found = false;
if (state == 0) {
found = true;
nextState = sr->stateZeroNextState;
if (!addSequence(keys, sr->stateZeroCharData)) {
return false;
}
}
else {
// we have a next entry
switch (sr->stateEntryFormat) {
case kUCKeyStateEntryTerminalFormat:
for (UInt16 j = 0; j < sr->stateEntryCount; ++j) {
if (kset[j].curState == state) {
if (!addSequence(keys, kset[j].charData)) {
return false;
}
nextState = 0;
found = true;
break;
}
}
break;
case kUCKeyStateEntryRangeFormat:
// XXX -- not supported yet
break;
default:
// XXX -- unknown format
return false;
}
}
if (!found) {
// use a terminator
if (m_st != NULL && state < m_st->keyStateTerminatorCount) {
if (!addSequence(keys, m_st->keyStateTerminators[state - 1])) {
return false;
}
}
nextState = sr->stateZeroNextState;
if (!addSequence(keys, sr->stateZeroCharData)) {
return false;
}
}
// next
state = nextState;
return true;
}
bool
COSXKeyState::CUCHRKeyResource::addSequence(
KeySequence& keys, UCKeyCharSeq c) const
{
if ((c & kUCKeyOutputTestForIndexMask) == kUCKeyOutputSequenceIndexMask) {
UInt16 index = (c & kUCKeyOutputGetIndexMask);
if (index < m_sdi->charSequenceCount &&
m_sdi->charSequenceOffsets[index] !=
m_sdi->charSequenceOffsets[index + 1]) {
// XXX -- sequences not supported yet
return false;
}
}
if (c != 0xfffe && c != 0xffff) {
KeyID id = unicharToKeyID(c);
if (id != kKeyNone) {
keys.push_back(id);
}
}
return true;
}
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