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980739567c
gecko-dev/widget/windows/KeyboardLayout.cpp
Gervase Markham 82ff7027aa Bug 716478 - update licence to MPL 2.
2012-05-21 12:12:37 +01:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Util.h"
#include "KeyboardLayout.h"
#include "nsWindow.h"
#include "nsIMM32Handler.h"
#include "nsMemory.h"
#include "nsToolkit.h"
#include "nsQuickSort.h"
#include "nsAlgorithm.h"
#include "nsGUIEvent.h"
#include "WidgetUtils.h"
#include "WinUtils.h"
#include "nsIDOMKeyEvent.h"
#include <windows.h>
#include <winuser.h>
#ifndef WINABLEAPI
#include <winable.h>
#endif
namespace mozilla {
namespace widget {
struct DeadKeyEntry
{
PRUnichar BaseChar;
PRUnichar CompositeChar;
};
class DeadKeyTable
{
friend class KeyboardLayout;
PRUint16 mEntries;
// KeyboardLayout::AddDeadKeyTable() will allocate as many entries as
// required. It is the only way to create new DeadKeyTable instances.
DeadKeyEntry mTable[1];
void Init(const DeadKeyEntry* aDeadKeyArray, PRUint32 aEntries)
{
mEntries = aEntries;
memcpy(mTable, aDeadKeyArray, aEntries * sizeof(DeadKeyEntry));
}
static PRUint32 SizeInBytes(PRUint32 aEntries)
{
return offsetof(DeadKeyTable, mTable) + aEntries * sizeof(DeadKeyEntry);
}
public:
PRUint32 Entries() const
{
return mEntries;
}
bool IsEqual(const DeadKeyEntry* aDeadKeyArray, PRUint32 aEntries) const
{
return (mEntries == aEntries &&
!memcmp(mTable, aDeadKeyArray,
aEntries * sizeof(DeadKeyEntry)));
}
PRUnichar GetCompositeChar(PRUnichar aBaseChar) const;
};
inline PRUnichar
VirtualKey::GetCompositeChar(PRUint8 aShiftState, PRUnichar aBaseChar) const
{
return mShiftStates[aShiftState].DeadKey.Table->GetCompositeChar(aBaseChar);
}
const DeadKeyTable*
VirtualKey::MatchingDeadKeyTable(const DeadKeyEntry* aDeadKeyArray,
PRUint32 aEntries) const
{
if (!mIsDeadKey) {
return nsnull;
}
for (PRUint32 shiftState = 0; shiftState < 16; shiftState++) {
if (!IsDeadKey(shiftState)) {
continue;
}
const DeadKeyTable* dkt = mShiftStates[shiftState].DeadKey.Table;
if (dkt && dkt->IsEqual(aDeadKeyArray, aEntries)) {
return dkt;
}
}
return nsnull;
}
void
VirtualKey::SetNormalChars(PRUint8 aShiftState,
const PRUnichar* aChars,
PRUint32 aNumOfChars)
{
NS_ASSERTION(aShiftState < ArrayLength(mShiftStates), "invalid index");
SetDeadKey(aShiftState, false);
for (PRUint32 index = 0; index < aNumOfChars; index++) {
// Ignore legacy non-printable control characters
mShiftStates[aShiftState].Normal.Chars[index] =
(aChars[index] >= 0x20) ? aChars[index] : 0;
}
PRUint32 len = ArrayLength(mShiftStates[aShiftState].Normal.Chars);
for (PRUint32 index = aNumOfChars; index < len; index++) {
mShiftStates[aShiftState].Normal.Chars[index] = 0;
}
}
void
VirtualKey::SetDeadChar(PRUint8 aShiftState, PRUnichar aDeadChar)
{
NS_ASSERTION(aShiftState < ArrayLength(mShiftStates), "invalid index");
SetDeadKey(aShiftState, true);
mShiftStates[aShiftState].DeadKey.DeadChar = aDeadChar;
mShiftStates[aShiftState].DeadKey.Table = nsnull;
}
PRUint32
VirtualKey::GetUniChars(PRUint8 aShiftState,
PRUnichar* aUniChars,
PRUint8* aFinalShiftState) const
{
*aFinalShiftState = aShiftState;
PRUint32 numOfChars = GetNativeUniChars(aShiftState, aUniChars);
if (!(aShiftState & (eAlt | eCtrl))) {
return numOfChars;
}
PRUnichar unshiftedChars[5];
PRUint32 numOfUnshiftedChars =
GetNativeUniChars(aShiftState & ~(eAlt | eCtrl), unshiftedChars);
if (!numOfChars) {
if (!numOfUnshiftedChars) {
return 0;
}
memcpy(aUniChars, unshiftedChars,
numOfUnshiftedChars * sizeof(PRUnichar));
return numOfUnshiftedChars;
}
if ((aShiftState & (eAlt | eCtrl)) == (eAlt | eCtrl)) {
// Even if the shifted chars and the unshifted chars are same, we
// should consume the Alt key state and the Ctrl key state when
// AltGr key is pressed. Because if we don't consume them, the input
// events are ignored on nsEditor. (I.e., Users cannot input the
// characters with this key combination.)
*aFinalShiftState &= ~(eAlt | eCtrl);
} else if (!(numOfChars == numOfUnshiftedChars &&
!memcmp(aUniChars, unshiftedChars,
numOfChars * sizeof(PRUnichar)))) {
// Otherwise, we should consume the Alt key state and the Ctrl key state
// only when the shifted chars and unshifted chars are different.
*aFinalShiftState &= ~(eAlt | eCtrl);
}
return numOfChars;
}
PRUint32
VirtualKey::GetNativeUniChars(PRUint8 aShiftState,
PRUnichar* aUniChars) const
{
if (IsDeadKey(aShiftState)) {
if (aUniChars) {
aUniChars[0] = mShiftStates[aShiftState].DeadKey.DeadChar;
}
return 1;
}
PRUint32 index;
PRUint32 len = ArrayLength(mShiftStates[aShiftState].Normal.Chars);
for (index = 0;
index < len && mShiftStates[aShiftState].Normal.Chars[index]; index++) {
if (aUniChars) {
aUniChars[index] = mShiftStates[aShiftState].Normal.Chars[index];
}
}
return index;
}
NativeKey::NativeKey(const KeyboardLayout& aKeyboardLayout,
nsWindow* aWindow,
const MSG& aKeyOrCharMessage) :
mDOMKeyCode(0), mVirtualKeyCode(0), mOriginalVirtualKeyCode(0)
{
mScanCode = WinUtils::GetScanCode(aKeyOrCharMessage.lParam);
mIsExtended = WinUtils::IsExtendedScanCode(aKeyOrCharMessage.lParam);
switch (aKeyOrCharMessage.message) {
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
mOriginalVirtualKeyCode = static_cast<PRUint8>(aKeyOrCharMessage.wParam);
switch (aKeyOrCharMessage.wParam) {
case VK_CONTROL:
case VK_MENU:
case VK_SHIFT:
mVirtualKeyCode = static_cast<PRUint8>(
::MapVirtualKeyEx(GetScanCodeWithExtendedFlag(),
MAPVK_VSC_TO_VK_EX, aKeyboardLayout.GetLayout()));
break;
case VK_PROCESSKEY:
mVirtualKeyCode = mOriginalVirtualKeyCode =
static_cast<PRUint8>(
::ImmGetVirtualKey(aWindow->GetWindowHandle()));
break;
default:
mVirtualKeyCode = mOriginalVirtualKeyCode;
break;
}
break;
case WM_CHAR:
case WM_UNICHAR:
case WM_SYSCHAR:
// We cannot compute the virtual key code from WM_CHAR message on WinXP
// and
if (mIsExtended &&
WinUtils::GetWindowsVersion() < WinUtils::VISTA_VERSION) {
break;
}
mVirtualKeyCode = mOriginalVirtualKeyCode = static_cast<PRUint8>(
::MapVirtualKeyEx(GetScanCodeWithExtendedFlag(),
MAPVK_VSC_TO_VK_EX, aKeyboardLayout.GetLayout()));
break;
default:
MOZ_NOT_REACHED("Unsupported message");
break;
}
if (!mVirtualKeyCode) {
mVirtualKeyCode = mOriginalVirtualKeyCode;
}
mDOMKeyCode =
aKeyboardLayout.ConvertNativeKeyCodeToDOMKeyCode(mOriginalVirtualKeyCode);
}
UINT
NativeKey::GetScanCodeWithExtendedFlag() const
{
// MapVirtualKeyEx() has been improved for supporting extended keys since
// Vista. When we call it for mapping a scancode of an extended key and
// a virtual keycode, we need to add 0xE000 to the scancode.
// On Win XP and Win Server 2003, this doesn't support. On them, we have
// no way to get virtual keycodes from scancode of extended keys.
if (!mIsExtended ||
WinUtils::GetWindowsVersion() < WinUtils::VISTA_VERSION) {
return mScanCode;
}
return (0xE000 | mScanCode);
}
PRUint32
NativeKey::GetKeyLocation() const
{
switch (mVirtualKeyCode) {
case VK_LSHIFT:
case VK_LCONTROL:
case VK_LMENU:
case VK_LWIN:
return nsIDOMKeyEvent::DOM_KEY_LOCATION_LEFT;
case VK_RSHIFT:
case VK_RCONTROL:
case VK_RMENU:
case VK_RWIN:
return nsIDOMKeyEvent::DOM_KEY_LOCATION_RIGHT;
case VK_RETURN:
return !mIsExtended ? nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD :
nsIDOMKeyEvent::DOM_KEY_LOCATION_NUMPAD;
case VK_INSERT:
case VK_DELETE:
case VK_END:
case VK_DOWN:
case VK_NEXT:
case VK_LEFT:
case VK_CLEAR:
case VK_RIGHT:
case VK_HOME:
case VK_UP:
case VK_PRIOR:
return mIsExtended ? nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD :
nsIDOMKeyEvent::DOM_KEY_LOCATION_NUMPAD;
// NumLock key isn't included due to IE9's behavior.
case VK_NUMPAD0:
case VK_NUMPAD1:
case VK_NUMPAD2:
case VK_NUMPAD3:
case VK_NUMPAD4:
case VK_NUMPAD5:
case VK_NUMPAD6:
case VK_NUMPAD7:
case VK_NUMPAD8:
case VK_NUMPAD9:
case VK_DECIMAL:
case VK_DIVIDE:
case VK_MULTIPLY:
case VK_SUBTRACT:
case VK_ADD:
return nsIDOMKeyEvent::DOM_KEY_LOCATION_NUMPAD;
default:
return nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD;
}
}
KeyboardLayout::KeyboardLayout() :
mKeyboardLayout(0)
{
mDeadKeyTableListHead = nsnull;
// Note: Don't call LoadLayout from here. Because an instance of this class
// can be static. In that case, we cannot use any services in LoadLayout,
// e.g., pref service.
}
KeyboardLayout::~KeyboardLayout()
{
ReleaseDeadKeyTables();
}
bool
KeyboardLayout::IsPrintableCharKey(PRUint8 aVirtualKey)
{
return GetKeyIndex(aVirtualKey) >= 0;
}
bool
KeyboardLayout::IsNumpadKey(PRUint8 aVirtualKey)
{
return VK_NUMPAD0 <= aVirtualKey && aVirtualKey <= VK_DIVIDE;
}
void
KeyboardLayout::OnKeyDown(PRUint8 aVirtualKey)
{
mLastVirtualKeyIndex = GetKeyIndex(aVirtualKey);
if (mLastVirtualKeyIndex < 0) {
// Does not produce any printable characters, but still preserves the
// dead-key state.
mNumOfChars = 0;
return;
}
BYTE kbdState[256];
if (!::GetKeyboardState(kbdState)) {
return;
}
mLastShiftState = GetShiftState(kbdState);
if (mVirtualKeys[mLastVirtualKeyIndex].IsDeadKey(mLastShiftState)) {
if (mActiveDeadKey < 0) {
// Dead-key state activated. No characters generated.
mActiveDeadKey = aVirtualKey;
mDeadKeyShiftState = mLastShiftState;
mNumOfChars = 0;
return;
}
// Dead-key followed by another dead-key. Reset dead-key state and
// return both dead-key characters.
PRInt32 activeDeadKeyIndex = GetKeyIndex(mActiveDeadKey);
mVirtualKeys[activeDeadKeyIndex].GetUniChars(mDeadKeyShiftState,
mChars, mShiftStates);
mVirtualKeys[mLastVirtualKeyIndex].GetUniChars(mLastShiftState,
&mChars[1],
&mShiftStates[1]);
mNumOfChars = 2;
DeactivateDeadKeyState();
return;
}
PRUint8 finalShiftState;
PRUnichar uniChars[5];
PRUint32 numOfBaseChars =
mVirtualKeys[mLastVirtualKeyIndex].GetUniChars(mLastShiftState, uniChars,
&finalShiftState);
if (mActiveDeadKey < 0) {
// No dead-keys are active. Just return the produced characters.
memcpy(mChars, uniChars, numOfBaseChars * sizeof(PRUnichar));
memset(mShiftStates, finalShiftState, numOfBaseChars);
mNumOfChars = numOfBaseChars;
return;
}
// Dead-key was active. See if pressed base character does produce
// valid composite character.
PRInt32 activeDeadKeyIndex = GetKeyIndex(mActiveDeadKey);
PRUnichar compositeChar = (numOfBaseChars == 1 && uniChars[0]) ?
mVirtualKeys[activeDeadKeyIndex].GetCompositeChar(mDeadKeyShiftState,
uniChars[0]) : 0;
if (compositeChar) {
// Active dead-key and base character does produce exactly one
// composite character.
mChars[0] = compositeChar;
mShiftStates[0] = finalShiftState;
mNumOfChars = 1;
} else {
// There is no valid dead-key and base character combination.
// Return dead-key character followed by base character.
mVirtualKeys[activeDeadKeyIndex].GetUniChars(mDeadKeyShiftState,
mChars, mShiftStates);
memcpy(&mChars[1], uniChars, numOfBaseChars * sizeof(PRUnichar));
memset(&mShiftStates[1], finalShiftState, numOfBaseChars);
mNumOfChars = numOfBaseChars + 1;
}
DeactivateDeadKeyState();
}
PRUint32
KeyboardLayout::GetUniChars(PRUnichar* aUniChars,
PRUint8* aShiftStates,
PRUint32 aMaxChars) const
{
PRUint32 chars = NS_MIN<PRUint32>(mNumOfChars, aMaxChars);
memcpy(aUniChars, mChars, chars * sizeof(PRUnichar));
memcpy(aShiftStates, mShiftStates, chars);
return chars;
}
PRUint32
KeyboardLayout::GetUniCharsWithShiftState(PRUint8 aVirtualKey,
PRUint8 aShiftStates,
PRUnichar* aUniChars,
PRUint32 aMaxChars) const
{
PRInt32 key = GetKeyIndex(aVirtualKey);
if (key < 0) {
return 0;
}
PRUint8 finalShiftState;
PRUnichar uniChars[5];
PRUint32 numOfBaseChars =
mVirtualKeys[key].GetUniChars(aShiftStates, uniChars, &finalShiftState);
PRUint32 chars = NS_MIN(numOfBaseChars, aMaxChars);
memcpy(aUniChars, uniChars, chars * sizeof(PRUnichar));
return chars;
}
void
KeyboardLayout::LoadLayout(HKL aLayout)
{
if (mKeyboardLayout == aLayout) {
return;
}
mKeyboardLayout = aLayout;
PRUint32 shiftState;
BYTE kbdState[256];
memset(kbdState, 0, sizeof(kbdState));
BYTE originalKbdState[256];
// Bitfield with all shift states that have at least one dead-key.
PRUint16 shiftStatesWithDeadKeys = 0;
// Bitfield with all shift states that produce any possible dead-key base
// characters.
PRUint16 shiftStatesWithBaseChars = 0;
mActiveDeadKey = -1;
mNumOfChars = 0;
ReleaseDeadKeyTables();
::GetKeyboardState(originalKbdState);
// For each shift state gather all printable characters that are produced
// for normal case when no any dead-key is active.
for (shiftState = 0; shiftState < 16; shiftState++) {
SetShiftState(kbdState, shiftState);
for (PRUint32 virtualKey = 0; virtualKey < 256; virtualKey++) {
PRInt32 vki = GetKeyIndex(virtualKey);
if (vki < 0) {
continue;
}
NS_ASSERTION(PRUint32(vki) < ArrayLength(mVirtualKeys), "invalid index");
PRUnichar uniChars[5];
PRInt32 ret =
::ToUnicodeEx(virtualKey, 0, kbdState, (LPWSTR)uniChars,
ArrayLength(uniChars), 0, mKeyboardLayout);
// dead-key
if (ret < 0) {
shiftStatesWithDeadKeys |= (1 << shiftState);
// Repeat dead-key to deactivate it and get its character
// representation.
PRUnichar deadChar[2];
ret = ::ToUnicodeEx(virtualKey, 0, kbdState, (LPWSTR)deadChar,
ArrayLength(deadChar), 0, mKeyboardLayout);
NS_ASSERTION(ret == 2, "Expecting twice repeated dead-key character");
mVirtualKeys[vki].SetDeadChar(shiftState, deadChar[0]);
} else {
if (ret == 1) {
// dead-key can pair only with exactly one base character.
shiftStatesWithBaseChars |= (1 << shiftState);
}
mVirtualKeys[vki].SetNormalChars(shiftState, uniChars, ret);
}
}
}
// Now process each dead-key to find all its base characters and resulting
// composite characters.
for (shiftState = 0; shiftState < 16; shiftState++) {
if (!(shiftStatesWithDeadKeys & (1 << shiftState))) {
continue;
}
SetShiftState(kbdState, shiftState);
for (PRUint32 virtualKey = 0; virtualKey < 256; virtualKey++) {
PRInt32 vki = GetKeyIndex(virtualKey);
if (vki >= 0 && mVirtualKeys[vki].IsDeadKey(shiftState)) {
DeadKeyEntry deadKeyArray[256];
PRInt32 n = GetDeadKeyCombinations(virtualKey, kbdState,
shiftStatesWithBaseChars,
deadKeyArray,
ArrayLength(deadKeyArray));
const DeadKeyTable* dkt =
mVirtualKeys[vki].MatchingDeadKeyTable(deadKeyArray, n);
if (!dkt) {
dkt = AddDeadKeyTable(deadKeyArray, n);
}
mVirtualKeys[vki].AttachDeadKeyTable(shiftState, dkt);
}
}
}
::SetKeyboardState(originalKbdState);
}
PRUint8
KeyboardLayout::GetShiftState(const PBYTE aKbdState)
{
bool isShift = (aKbdState[VK_SHIFT] & 0x80) != 0;
bool isCtrl = (aKbdState[VK_CONTROL] & 0x80) != 0;
bool isAlt = (aKbdState[VK_MENU] & 0x80) != 0;
bool isCaps = (aKbdState[VK_CAPITAL] & 0x01) != 0;
return ((isCaps << 3) | (isAlt << 2) | (isCtrl << 1) | isShift);
}
void
KeyboardLayout::SetShiftState(PBYTE aKbdState, PRUint8 aShiftState)
{
NS_ASSERTION(aShiftState < 16, "aShiftState out of range");
if (aShiftState & eShift) {
aKbdState[VK_SHIFT] |= 0x80;
} else {
aKbdState[VK_SHIFT] &= ~0x80;
aKbdState[VK_LSHIFT] &= ~0x80;
aKbdState[VK_RSHIFT] &= ~0x80;
}
if (aShiftState & eCtrl) {
aKbdState[VK_CONTROL] |= 0x80;
} else {
aKbdState[VK_CONTROL] &= ~0x80;
aKbdState[VK_LCONTROL] &= ~0x80;
aKbdState[VK_RCONTROL] &= ~0x80;
}
if (aShiftState & eAlt) {
aKbdState[VK_MENU] |= 0x80;
} else {
aKbdState[VK_MENU] &= ~0x80;
aKbdState[VK_LMENU] &= ~0x80;
aKbdState[VK_RMENU] &= ~0x80;
}
if (aShiftState & eCapsLock) {
aKbdState[VK_CAPITAL] |= 0x01;
} else {
aKbdState[VK_CAPITAL] &= ~0x01;
}
}
inline PRInt32
KeyboardLayout::GetKeyIndex(PRUint8 aVirtualKey)
{
// Currently these 54 (NS_NUM_OF_KEYS) virtual keys are assumed
// to produce visible representation:
// 0x20 - VK_SPACE ' '
// 0x30..0x39 '0'..'9'
// 0x41..0x5A 'A'..'Z'
// 0x6E - VK_DECIMAL '.'
// 0xBA - VK_OEM_1 ';:' for US
// 0xBB - VK_OEM_PLUS '+' any country
// 0xBC - VK_OEM_COMMA ',' any country
// 0xBD - VK_OEM_MINUS '-' any country
// 0xBE - VK_OEM_PERIOD '.' any country
// 0xBF - VK_OEM_2 '/?' for US
// 0xC0 - VK_OEM_3 '`~' for US
// 0xDB - VK_OEM_4 '[{' for US
// 0xDC - VK_OEM_5 '\|' for US
// 0xDD - VK_OEM_6 ']}' for US
// 0xDE - VK_OEM_7 ''"' for US
// 0xDF - VK_OEM_8
// 0xE1 - no name
// 0xE2 - VK_OEM_102 '\_' for JIS
// 0xE3 - no name
// 0xE4 - no name
static const PRInt8 xlat[256] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
//-----------------------------------------------------------------------
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 00
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 10
0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 20
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, -1, -1, -1, -1, -1, -1, // 30
-1, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // 40
26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, -1, -1, -1, -1, -1, // 50
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 37, -1, // 60
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 70
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 80
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 90
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // A0
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 38, 39, 40, 41, 42, 43, // B0
44, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // C0
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 45, 46, 47, 48, 49, // D0
-1, 50, 51, 52, 53, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // E0
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // F0
};
return xlat[aVirtualKey];
}
int
KeyboardLayout::CompareDeadKeyEntries(const void* aArg1,
const void* aArg2,
void*)
{
const DeadKeyEntry* arg1 = static_cast<const DeadKeyEntry*>(aArg1);
const DeadKeyEntry* arg2 = static_cast<const DeadKeyEntry*>(aArg2);
return arg1->BaseChar - arg2->BaseChar;
}
const DeadKeyTable*
KeyboardLayout::AddDeadKeyTable(const DeadKeyEntry* aDeadKeyArray,
PRUint32 aEntries)
{
DeadKeyTableListEntry* next = mDeadKeyTableListHead;
const size_t bytes = offsetof(DeadKeyTableListEntry, data) +
DeadKeyTable::SizeInBytes(aEntries);
PRUint8* p = new PRUint8[bytes];
mDeadKeyTableListHead = reinterpret_cast<DeadKeyTableListEntry*>(p);
mDeadKeyTableListHead->next = next;
DeadKeyTable* dkt =
reinterpret_cast<DeadKeyTable*>(mDeadKeyTableListHead->data);
dkt->Init(aDeadKeyArray, aEntries);
return dkt;
}
void
KeyboardLayout::ReleaseDeadKeyTables()
{
while (mDeadKeyTableListHead) {
PRUint8* p = reinterpret_cast<PRUint8*>(mDeadKeyTableListHead);
mDeadKeyTableListHead = mDeadKeyTableListHead->next;
delete [] p;
}
}
bool
KeyboardLayout::EnsureDeadKeyActive(bool aIsActive,
PRUint8 aDeadKey,
const PBYTE aDeadKeyKbdState)
{
PRInt32 ret;
do {
PRUnichar dummyChars[5];
ret = ::ToUnicodeEx(aDeadKey, 0, (PBYTE)aDeadKeyKbdState,
(LPWSTR)dummyChars, ArrayLength(dummyChars), 0,
mKeyboardLayout);
// returned values:
// <0 - Dead key state is active. The keyboard driver will wait for next
// character.
// 1 - Previous pressed key was a valid base character that produced
// exactly one composite character.
// >1 - Previous pressed key does not produce any composite characters.
// Return dead-key character followed by base character(s).
} while ((ret < 0) != aIsActive);
return (ret < 0);
}
void
KeyboardLayout::DeactivateDeadKeyState()
{
if (mActiveDeadKey < 0) {
return;
}
BYTE kbdState[256];
memset(kbdState, 0, sizeof(kbdState));
SetShiftState(kbdState, mDeadKeyShiftState);
EnsureDeadKeyActive(false, mActiveDeadKey, kbdState);
mActiveDeadKey = -1;
}
bool
KeyboardLayout::AddDeadKeyEntry(PRUnichar aBaseChar,
PRUnichar aCompositeChar,
DeadKeyEntry* aDeadKeyArray,
PRUint32 aEntries)
{
for (PRUint32 index = 0; index < aEntries; index++) {
if (aDeadKeyArray[index].BaseChar == aBaseChar) {
return false;
}
}
aDeadKeyArray[aEntries].BaseChar = aBaseChar;
aDeadKeyArray[aEntries].CompositeChar = aCompositeChar;
return true;
}
PRUint32
KeyboardLayout::GetDeadKeyCombinations(PRUint8 aDeadKey,
const PBYTE aDeadKeyKbdState,
PRUint16 aShiftStatesWithBaseChars,
DeadKeyEntry* aDeadKeyArray,
PRUint32 aMaxEntries)
{
bool deadKeyActive = false;
PRUint32 entries = 0;
BYTE kbdState[256];
memset(kbdState, 0, sizeof(kbdState));
for (PRUint32 shiftState = 0; shiftState < 16; shiftState++) {
if (!(aShiftStatesWithBaseChars & (1 << shiftState))) {
continue;
}
SetShiftState(kbdState, shiftState);
for (PRUint32 virtualKey = 0; virtualKey < 256; virtualKey++) {
PRInt32 vki = GetKeyIndex(virtualKey);
// Dead-key can pair only with such key that produces exactly one base
// character.
if (vki >= 0 && mVirtualKeys[vki].GetNativeUniChars(shiftState) == 1) {
// Ensure dead-key is in active state, when it swallows entered
// character and waits for the next pressed key.
if (!deadKeyActive) {
deadKeyActive = EnsureDeadKeyActive(true, aDeadKey,
aDeadKeyKbdState);
}
// Depending on the character the followed the dead-key, the keyboard
// driver can produce one composite character, or a dead-key character
// followed by a second character.
PRUnichar compositeChars[5];
PRInt32 ret =
::ToUnicodeEx(virtualKey, 0, kbdState, (LPWSTR)compositeChars,
ArrayLength(compositeChars), 0, mKeyboardLayout);
switch (ret) {
case 0:
// This key combination does not produce any characters. The
// dead-key is still in active state.
break;
case 1: {
// Exactly one composite character produced. Now, when dead-key
// is not active, repeat the last character one more time to
// determine the base character.
PRUnichar baseChars[5];
ret = ::ToUnicodeEx(virtualKey, 0, kbdState, (LPWSTR)baseChars,
ArrayLength(baseChars), 0, mKeyboardLayout);
NS_ASSERTION(ret == 1, "One base character expected");
if (ret == 1 && entries < aMaxEntries &&
AddDeadKeyEntry(baseChars[0], compositeChars[0],
aDeadKeyArray, entries)) {
entries++;
}
deadKeyActive = false;
break;
}
default:
// 1. Unexpected dead-key. Dead-key chaining is not supported.
// 2. More than one character generated. This is not a valid
// dead-key and base character combination.
deadKeyActive = false;
break;
}
}
}
}
if (deadKeyActive) {
deadKeyActive = EnsureDeadKeyActive(false, aDeadKey, aDeadKeyKbdState);
}
NS_QuickSort(aDeadKeyArray, entries, sizeof(DeadKeyEntry),
CompareDeadKeyEntries, nsnull);
return entries;
}
PRUint32
KeyboardLayout::ConvertNativeKeyCodeToDOMKeyCode(UINT aNativeKeyCode) const
{
// Alphabet or Numeric or Numpad or Function keys
if ((aNativeKeyCode >= 0x30 && aNativeKeyCode <= 0x39) ||
(aNativeKeyCode >= 0x41 && aNativeKeyCode <= 0x5A) ||
(aNativeKeyCode >= 0x60 && aNativeKeyCode <= 0x87)) {
return static_cast<PRUint32>(aNativeKeyCode);
}
switch (aNativeKeyCode) {
// Following keycodes are same as our DOM keycodes
case VK_CANCEL:
case VK_BACK:
case VK_TAB:
case VK_CLEAR:
case VK_RETURN:
case VK_SHIFT:
case VK_CONTROL:
case VK_MENU: // Alt
case VK_PAUSE:
case VK_CAPITAL: // CAPS LOCK
case VK_KANA: // same as VK_HANGUL
case VK_JUNJA:
case VK_FINAL:
case VK_HANJA: // same as VK_KANJI
case VK_ESCAPE:
case VK_CONVERT:
case VK_NONCONVERT:
case VK_ACCEPT:
case VK_MODECHANGE:
case VK_SPACE:
case VK_PRIOR: // PAGE UP
case VK_NEXT: // PAGE DOWN
case VK_END:
case VK_HOME:
case VK_LEFT:
case VK_UP:
case VK_RIGHT:
case VK_DOWN:
case VK_SELECT:
case VK_PRINT:
case VK_EXECUTE:
case VK_SNAPSHOT:
case VK_INSERT:
case VK_DELETE:
case VK_APPS: // Context Menu
case VK_SLEEP:
case VK_NUMLOCK:
case VK_SCROLL: // SCROLL LOCK
return PRUint32(aNativeKeyCode);
case VK_HELP:
return NS_VK_HELP;
// Windows key should be mapped to a Win keycode
// They should be able to be distinguished by DOM3 KeyboardEvent.location
case VK_LWIN:
case VK_RWIN:
return NS_VK_WIN;
// Following keycodes are not defined in our DOM keycodes.
case VK_BROWSER_BACK:
case VK_BROWSER_FORWARD:
case VK_BROWSER_REFRESH:
case VK_BROWSER_STOP:
case VK_BROWSER_SEARCH:
case VK_BROWSER_FAVORITES:
case VK_BROWSER_HOME:
case VK_VOLUME_MUTE:
case VK_VOLUME_DOWN:
case VK_VOLUME_UP:
case VK_MEDIA_NEXT_TRACK:
case VK_MEDIA_STOP:
case VK_MEDIA_PLAY_PAUSE:
case VK_LAUNCH_MAIL:
case VK_LAUNCH_MEDIA_SELECT:
case VK_LAUNCH_APP1:
case VK_LAUNCH_APP2:
case VK_ATTN: // Attension key of IBM midrange computers, e.g., AS/400
case VK_CRSEL: // Cursor Selection
case VK_EXSEL: // Extend Selection
case VK_EREOF: // Erase EOF key of IBM 3270 keyboard layout
case VK_PLAY:
case VK_ZOOM:
case VK_PA1: // PA1 key of IBM 3270 keyboard layout
case VK_OEM_CLEAR:
return 0;
// Following keycodes are only used by Nokia/Ericsson, we don't define them
case VK_OEM_RESET:
case VK_OEM_JUMP:
case VK_OEM_PA1:
case VK_OEM_PA2:
case VK_OEM_PA3:
case VK_OEM_WSCTRL:
case VK_OEM_CUSEL:
case VK_OEM_ATTN:
case VK_OEM_FINISH:
case VK_OEM_COPY:
case VK_OEM_AUTO:
case VK_OEM_ENLW:
case VK_OEM_BACKTAB:
return 0;
// Following keycodes are OEM keys which are keycodes for non-alphabet and
// non-numeric keys, we should compute each keycode of them from unshifted
// character which is inputted by each key. But if the unshifted character
// is not an ASCII character but shifted character is an ASCII character,
// we should refer it.
case VK_OEM_1:
case VK_OEM_PLUS:
case VK_OEM_COMMA:
case VK_OEM_MINUS:
case VK_OEM_PERIOD:
case VK_OEM_2:
case VK_OEM_3:
case VK_OEM_4:
case VK_OEM_5:
case VK_OEM_6:
case VK_OEM_7:
case VK_OEM_8:
case 0xE1: // OEM specific
case VK_OEM_102:
case 0xE3: // OEM specific
case 0xE4: // OEM specific
{
NS_ASSERTION(IsPrintableCharKey(aNativeKeyCode),
"The key must be printable");
PRUnichar uniChars[5];
PRUint32 numOfChars =
GetUniCharsWithShiftState(aNativeKeyCode, 0,
uniChars, ArrayLength(uniChars));
if (numOfChars != 1 || uniChars[0] < ' ' || uniChars[0] > 0x7F) {
numOfChars =
GetUniCharsWithShiftState(aNativeKeyCode, eShift,
uniChars, ArrayLength(uniChars));
if (numOfChars != 1 || uniChars[0] < ' ' || uniChars[0] > 0x7F) {
return 0;
}
}
return WidgetUtils::ComputeKeyCodeFromChar(uniChars[0]);
}
// VK_PROCESSKEY means IME already consumed the key event.
case VK_PROCESSKEY:
return 0;
// VK_PACKET is generated by SendInput() API, we don't need to
// care this message as key event.
case VK_PACKET:
return 0;
}
NS_WARNING("Unknown key code comes, please check latest MSDN document,"
" there may be some new keycodes we have not known.");
return 0;
}
PRUnichar
DeadKeyTable::GetCompositeChar(PRUnichar aBaseChar) const
{
// Dead-key table is sorted by BaseChar in ascending order.
// Usually they are too small to use binary search.
for (PRUint32 index = 0; index < mEntries; index++) {
if (mTable[index].BaseChar == aBaseChar) {
return mTable[index].CompositeChar;
}
if (mTable[index].BaseChar > aBaseChar) {
break;
}
}
return 0;
}
} // namespace widget
} // namespace mozilla
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