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gecko/widget/windows/KeyboardLayout.cpp

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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 "nsUnicharUtils.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;
};
/*****************************************************************************
* mozilla::widget::ModifierKeyState
*****************************************************************************/
void
ModifierKeyState::Update()
{
mModifiers = 0;
if (IS_VK_DOWN(VK_SHIFT)) {
mModifiers |= MODIFIER_SHIFT;
}
if (IS_VK_DOWN(VK_CONTROL)) {
mModifiers |= MODIFIER_CONTROL;
}
if (IS_VK_DOWN(VK_MENU)) {
mModifiers |= MODIFIER_ALT;
}
if (IS_VK_DOWN(VK_LWIN) || IS_VK_DOWN(VK_RWIN)) {
mModifiers |= MODIFIER_OS;
}
if (::GetKeyState(VK_CAPITAL) & 1) {
mModifiers |= MODIFIER_CAPSLOCK;
}
if (::GetKeyState(VK_NUMLOCK) & 1) {
mModifiers |= MODIFIER_NUMLOCK;
}
if (::GetKeyState(VK_SCROLL) & 1) {
mModifiers |= MODIFIER_SCROLLLOCK;
}
EnsureAltGr();
}
void
ModifierKeyState::InitInputEvent(nsInputEvent& aInputEvent) const
{
aInputEvent.modifiers = mModifiers;
switch(aInputEvent.eventStructType) {
case NS_MOUSE_EVENT:
case NS_MOUSE_SCROLL_EVENT:
case NS_WHEEL_EVENT:
case NS_DRAG_EVENT:
case NS_SIMPLE_GESTURE_EVENT:
case NS_MOZTOUCH_EVENT:
InitMouseEvent(aInputEvent);
break;
}
}
void
ModifierKeyState::InitMouseEvent(nsInputEvent& aMouseEvent) const
{
NS_ASSERTION(aMouseEvent.eventStructType == NS_MOUSE_EVENT ||
aMouseEvent.eventStructType == NS_WHEEL_EVENT ||
aMouseEvent.eventStructType == NS_DRAG_EVENT ||
aMouseEvent.eventStructType == NS_SIMPLE_GESTURE_EVENT ||
aMouseEvent.eventStructType == NS_MOZTOUCH_EVENT,
"called with non-mouse event");
nsMouseEvent_base& mouseEvent = static_cast<nsMouseEvent_base&>(aMouseEvent);
mouseEvent.buttons = 0;
if (::GetKeyState(VK_LBUTTON) < 0) {
mouseEvent.buttons |= nsMouseEvent::eLeftButtonFlag;
}
if (::GetKeyState(VK_RBUTTON) < 0) {
mouseEvent.buttons |= nsMouseEvent::eRightButtonFlag;
}
if (::GetKeyState(VK_MBUTTON) < 0) {
mouseEvent.buttons |= nsMouseEvent::eMiddleButtonFlag;
}
if (::GetKeyState(VK_XBUTTON1) < 0) {
mouseEvent.buttons |= nsMouseEvent::e4thButtonFlag;
}
if (::GetKeyState(VK_XBUTTON2) < 0) {
mouseEvent.buttons |= nsMouseEvent::e5thButtonFlag;
}
}
/*****************************************************************************
* mozilla::widget::UniCharsAndModifiers
*****************************************************************************/
void
UniCharsAndModifiers::Append(PRUnichar aUniChar, Modifiers aModifiers)
{
MOZ_ASSERT(mLength < 5);
mChars[mLength] = aUniChar;
mModifiers[mLength] = aModifiers;
mLength++;
}
void
UniCharsAndModifiers::FillModifiers(Modifiers aModifiers)
{
for (PRUint32 i = 0; i < mLength; i++) {
mModifiers[i] = aModifiers;
}
}
bool
UniCharsAndModifiers::UniCharsEqual(const UniCharsAndModifiers& aOther) const
{
if (mLength != aOther.mLength) {
return false;
}
return !memcmp(mChars, aOther.mChars, mLength * sizeof(PRUnichar));
}
bool
UniCharsAndModifiers::UniCharsCaseInsensitiveEqual(
const UniCharsAndModifiers& aOther) const
{
if (mLength != aOther.mLength) {
return false;
}
nsCaseInsensitiveStringComparator comp;
return !comp(mChars, aOther.mChars, mLength, aOther.mLength);
}
UniCharsAndModifiers&
UniCharsAndModifiers::operator+=(const UniCharsAndModifiers& aOther)
{
PRUint32 copyCount = NS_MIN(aOther.mLength, 5 - mLength);
NS_ENSURE_TRUE(copyCount > 0, *this);
memcpy(&mChars[mLength], aOther.mChars, copyCount * sizeof(PRUnichar));
memcpy(&mModifiers[mLength], aOther.mModifiers,
copyCount * sizeof(Modifiers));
mLength += copyCount;
return *this;
}
UniCharsAndModifiers
UniCharsAndModifiers::operator+(const UniCharsAndModifiers& aOther) const
{
UniCharsAndModifiers result(*this);
result += aOther;
return result;
}
/*****************************************************************************
* mozilla::widget::VirtualKey
*****************************************************************************/
inline PRUnichar
VirtualKey::GetCompositeChar(ShiftState aShiftState, PRUnichar aBaseChar) const
{
return mShiftStates[aShiftState].DeadKey.Table->GetCompositeChar(aBaseChar);
}
const DeadKeyTable*
VirtualKey::MatchingDeadKeyTable(const DeadKeyEntry* aDeadKeyArray,
PRUint32 aEntries) const
{
if (!mIsDeadKey) {
return nullptr;
}
for (ShiftState 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 nullptr;
}
void
VirtualKey::SetNormalChars(ShiftState 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(ShiftState aShiftState, PRUnichar aDeadChar)
{
NS_ASSERTION(aShiftState < ArrayLength(mShiftStates), "invalid index");
SetDeadKey(aShiftState, true);
mShiftStates[aShiftState].DeadKey.DeadChar = aDeadChar;
mShiftStates[aShiftState].DeadKey.Table = nullptr;
}
UniCharsAndModifiers
VirtualKey::GetUniChars(ShiftState aShiftState) const
{
UniCharsAndModifiers result = GetNativeUniChars(aShiftState);
const ShiftState STATE_ALT_CONTROL = (STATE_ALT | STATE_CONTROL);
if (!(aShiftState & STATE_ALT_CONTROL)) {
return result;
}
if (!result.mLength) {
result = GetNativeUniChars(aShiftState & ~STATE_ALT_CONTROL);
result.FillModifiers(ShiftStateToModifiers(aShiftState));
return result;
}
if ((aShiftState & STATE_ALT_CONTROL) == STATE_ALT_CONTROL) {
// 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.)
Modifiers finalModifiers = ShiftStateToModifiers(aShiftState);
finalModifiers &= ~(MODIFIER_ALT | MODIFIER_CONTROL);
result.FillModifiers(finalModifiers);
return result;
}
UniCharsAndModifiers unmodifiedReslt =
GetNativeUniChars(aShiftState & ~STATE_ALT_CONTROL);
if (!result.UniCharsEqual(unmodifiedReslt)) {
// Otherwise, we should consume the Alt key state and the Ctrl key state
// only when the shifted chars and unshifted chars are different.
Modifiers finalModifiers = ShiftStateToModifiers(aShiftState);
finalModifiers &= ~(MODIFIER_ALT | MODIFIER_CONTROL);
result.FillModifiers(finalModifiers);
}
return result;
}
UniCharsAndModifiers
VirtualKey::GetNativeUniChars(ShiftState aShiftState) const
{
UniCharsAndModifiers result;
Modifiers modifiers = ShiftStateToModifiers(aShiftState);
if (IsDeadKey(aShiftState)) {
result.Append(mShiftStates[aShiftState].DeadKey.DeadChar, modifiers);
return result;
}
PRUint32 index;
PRUint32 len = ArrayLength(mShiftStates[aShiftState].Normal.Chars);
for (index = 0;
index < len && mShiftStates[aShiftState].Normal.Chars[index]; index++) {
result.Append(mShiftStates[aShiftState].Normal.Chars[index], modifiers);
}
return result;
}
// static
void
VirtualKey::FillKbdState(PBYTE aKbdState,
const ShiftState aShiftState)
{
NS_ASSERTION(aShiftState < 16, "aShiftState out of range");
if (aShiftState & STATE_SHIFT) {
aKbdState[VK_SHIFT] |= 0x80;
} else {
aKbdState[VK_SHIFT] &= ~0x80;
aKbdState[VK_LSHIFT] &= ~0x80;
aKbdState[VK_RSHIFT] &= ~0x80;
}
if (aShiftState & STATE_CONTROL) {
aKbdState[VK_CONTROL] |= 0x80;
} else {
aKbdState[VK_CONTROL] &= ~0x80;
aKbdState[VK_LCONTROL] &= ~0x80;
aKbdState[VK_RCONTROL] &= ~0x80;
}
if (aShiftState & STATE_ALT) {
aKbdState[VK_MENU] |= 0x80;
} else {
aKbdState[VK_MENU] &= ~0x80;
aKbdState[VK_LMENU] &= ~0x80;
aKbdState[VK_RMENU] &= ~0x80;
}
if (aShiftState & STATE_CAPSLOCK) {
aKbdState[VK_CAPITAL] |= 0x01;
} else {
aKbdState[VK_CAPITAL] &= ~0x01;
}
}
/*****************************************************************************
* mozilla::widget::NativeKey
*****************************************************************************/
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);
// On WinXP and WinServer2003, we cannot compute the virtual keycode for
// extended keys due to the API limitation.
bool canComputeVirtualKeyCodeFromScanCode =
(!mIsExtended || WinUtils::GetWindowsVersion() >= WinUtils::VISTA_VERSION);
switch (aKeyOrCharMessage.message) {
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP: {
// First, resolve the IME converted virtual keycode to its original
// keycode.
if (aKeyOrCharMessage.wParam == VK_PROCESSKEY) {
mOriginalVirtualKeyCode = static_cast<PRUint8>(
::ImmGetVirtualKey(aWindow->GetWindowHandle()));
} else {
mOriginalVirtualKeyCode =
static_cast<PRUint8>(aKeyOrCharMessage.wParam);
}
// Most keys are not distinguished as left or right keys.
bool isLeftRightDistinguishedKey = false;
// mOriginalVirtualKeyCode must not distinguish left or right of
// Shift, Control or Alt.
switch (mOriginalVirtualKeyCode) {
case VK_SHIFT:
case VK_CONTROL:
case VK_MENU:
isLeftRightDistinguishedKey = true;
break;
case VK_LSHIFT:
case VK_RSHIFT:
mVirtualKeyCode = mOriginalVirtualKeyCode;
mOriginalVirtualKeyCode = VK_SHIFT;
isLeftRightDistinguishedKey = true;
break;
case VK_LCONTROL:
case VK_RCONTROL:
mVirtualKeyCode = mOriginalVirtualKeyCode;
mOriginalVirtualKeyCode = VK_CONTROL;
isLeftRightDistinguishedKey = true;
break;
case VK_LMENU:
case VK_RMENU:
mVirtualKeyCode = mOriginalVirtualKeyCode;
mOriginalVirtualKeyCode = VK_MENU;
isLeftRightDistinguishedKey = true;
break;
}
// If virtual keycode (left-right distinguished keycode) is already
// computed, we don't need to do anymore.
if (mVirtualKeyCode) {
break;
}
// If the keycode doesn't have LR distinguished keycode, we just set
// mOriginalVirtualKeyCode to mVirtualKeyCode. Note that don't compute
// it from MapVirtualKeyEx() because the scan code might be wrong if
// the message is sent/posted by other application. Then, we will compute
// unexpected keycode from the scan code.
if (!isLeftRightDistinguishedKey) {
break;
}
if (!canComputeVirtualKeyCodeFromScanCode) {
// The right control key and the right alt key are extended keys.
// Therefore, we never get VK_RCONTRL and VK_RMENU for the result of
// MapVirtualKeyEx() on WinXP or WinServer2003.
//
// If VK_CONTROL or VK_MENU key message is caused by an extended key,
// we should assume that the right key of them is pressed.
switch (mOriginalVirtualKeyCode) {
case VK_CONTROL:
mVirtualKeyCode = VK_RCONTROL;
break;
case VK_MENU:
mVirtualKeyCode = VK_RMENU;
break;
case VK_SHIFT:
// Neither left shift nor right shift is not an extended key,
// let's use VK_LSHIFT for invalid scan code.
mVirtualKeyCode = VK_LSHIFT;
break;
default:
MOZ_NOT_REACHED("Unsupported mOriginalVirtualKeyCode");
break;
}
break;
}
NS_ASSERTION(!mVirtualKeyCode,
"mVirtualKeyCode has been computed already");
// Otherwise, compute the virtual keycode with MapVirtualKeyEx().
mVirtualKeyCode = static_cast<PRUint8>(
::MapVirtualKeyEx(GetScanCodeWithExtendedFlag(),
MAPVK_VSC_TO_VK_EX, aKeyboardLayout.GetLayout()));
// The result might be unexpected value due to the scan code is
// wrong. For example, any key messages can be generated by
// SendMessage() or PostMessage() from applications. So, it's possible
// failure. Then, let's respect the extended flag even if it might be
// set intentionally.
switch (mOriginalVirtualKeyCode) {
case VK_CONTROL:
if (mVirtualKeyCode != VK_LCONTROL &&
mVirtualKeyCode != VK_RCONTROL) {
mVirtualKeyCode = mIsExtended ? VK_RCONTROL : VK_LCONTROL;
}
break;
case VK_MENU:
if (mVirtualKeyCode != VK_LMENU && mVirtualKeyCode != VK_RMENU) {
mVirtualKeyCode = mIsExtended ? VK_RMENU : VK_LMENU;
}
break;
case VK_SHIFT:
if (mVirtualKeyCode != VK_LSHIFT && mVirtualKeyCode != VK_RSHIFT) {
// Neither left shift nor right shift is not an extended key,
// let's use VK_LSHIFT for invalid scan code.
mVirtualKeyCode = VK_LSHIFT;
}
break;
default:
MOZ_NOT_REACHED("Unsupported 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
// if it's caused by an extended key.
if (!canComputeVirtualKeyCodeFromScanCode) {
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) {
NS_WARNING("GetScanCodeWithExtendedFlat() returns without extended flag");
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:
// XXX This code assumes that all keyboard drivers use same mapping.
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:
// XXX This code assumes that all keyboard drivers use same mapping.
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;
case VK_SHIFT:
case VK_CONTROL:
case VK_MENU:
NS_WARNING("Failed to decide the key location?");
default:
return nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD;
}
}
/*****************************************************************************
* mozilla::widget::KeyboardLayout
*****************************************************************************/
KeyboardLayout::KeyboardLayout() :
mKeyboardLayout(0), mPendingKeyboardLayout(0)
{
mDeadKeyTableListHead = nullptr;
// 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::IsDeadKey(PRUint8 aVirtualKey,
const ModifierKeyState& aModKeyState) const
{
PRInt32 virtualKeyIndex = GetKeyIndex(aVirtualKey);
if (virtualKeyIndex < 0) {
return false;
}
return mVirtualKeys[virtualKeyIndex].IsDeadKey(
VirtualKey::ModifiersToShiftState(aModKeyState.GetModifiers()));
}
UniCharsAndModifiers
KeyboardLayout::OnKeyDown(PRUint8 aVirtualKey,
const ModifierKeyState& aModKeyState)
{
if (mPendingKeyboardLayout) {
LoadLayout(mPendingKeyboardLayout);
}
PRInt32 virtualKeyIndex = GetKeyIndex(aVirtualKey);
if (virtualKeyIndex < 0) {
// Does not produce any printable characters, but still preserves the
// dead-key state.
return UniCharsAndModifiers();
}
PRUint8 shiftState =
VirtualKey::ModifiersToShiftState(aModKeyState.GetModifiers());
if (mVirtualKeys[virtualKeyIndex].IsDeadKey(shiftState)) {
if (mActiveDeadKey < 0) {
// Dead-key state activated. No characters generated.
mActiveDeadKey = aVirtualKey;
mDeadKeyShiftState = shiftState;
return UniCharsAndModifiers();
}
// Dead-key followed by another dead-key. Reset dead-key state and
// return both dead-key characters.
PRInt32 activeDeadKeyIndex = GetKeyIndex(mActiveDeadKey);
UniCharsAndModifiers result =
mVirtualKeys[activeDeadKeyIndex].GetUniChars(mDeadKeyShiftState);
result += mVirtualKeys[virtualKeyIndex].GetUniChars(shiftState);
DeactivateDeadKeyState();
return result;
}
UniCharsAndModifiers baseChars =
mVirtualKeys[virtualKeyIndex].GetUniChars(shiftState);
if (mActiveDeadKey < 0) {
// No dead-keys are active. Just return the produced characters.
return baseChars;
}
// Dead-key was active. See if pressed base character does produce
// valid composite character.
PRInt32 activeDeadKeyIndex = GetKeyIndex(mActiveDeadKey);
PRUnichar compositeChar = (baseChars.mLength == 1 && baseChars.mChars[0]) ?
mVirtualKeys[activeDeadKeyIndex].GetCompositeChar(mDeadKeyShiftState,
baseChars.mChars[0]) : 0;
if (compositeChar) {
// Active dead-key and base character does produce exactly one
// composite character.
UniCharsAndModifiers result;
result.Append(compositeChar, baseChars.mModifiers[0]);
DeactivateDeadKeyState();
return result;
}
// There is no valid dead-key and base character combination.
// Return dead-key character followed by base character.
UniCharsAndModifiers result =
mVirtualKeys[activeDeadKeyIndex].GetUniChars(mDeadKeyShiftState);
result += baseChars;
DeactivateDeadKeyState();
return result;
}
UniCharsAndModifiers
KeyboardLayout::GetUniCharsAndModifiers(
PRUint8 aVirtualKey,
const ModifierKeyState& aModKeyState) const
{
UniCharsAndModifiers result;
PRInt32 key = GetKeyIndex(aVirtualKey);
if (key < 0) {
return result;
}
return mVirtualKeys[key].
GetUniChars(VirtualKey::ModifiersToShiftState(aModKeyState.GetModifiers()));
}
void
KeyboardLayout::LoadLayout(HKL aLayout, bool aLoadLater)
{
if (aLoadLater) {
mPendingKeyboardLayout = aLayout;
return;
}
mPendingKeyboardLayout = 0;
if (mKeyboardLayout == aLayout) {
return;
}
mKeyboardLayout = aLayout;
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;
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 (VirtualKey::ShiftState shiftState = 0; shiftState < 16; shiftState++) {
VirtualKey::FillKbdState(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 (VirtualKey::ShiftState shiftState = 0; shiftState < 16; shiftState++) {
if (!(shiftStatesWithDeadKeys & (1 << shiftState))) {
continue;
}
VirtualKey::FillKbdState(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);
}
inline PRInt32
KeyboardLayout::GetKeyIndex(PRUint8 aVirtualKey)
{
// Currently these 68 (NS_NUM_OF_KEYS) virtual keys are assumed
// to produce visible representation:
// 0x20 - VK_SPACE ' '
// 0x30..0x39 '0'..'9'
// 0x41..0x5A 'A'..'Z'
// 0x60..0x69 '0'..'9' on numpad
// 0x6A - VK_MULTIPLY '*' on numpad
// 0x6B - VK_ADD '+' on numpad
// 0x6D - VK_SUBTRACT '-' on numpad
// 0x6E - VK_DECIMAL '.' on numpad
// 0x6F - VK_DIVIDE '/' on numpad
// 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
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, -1, 49, 50, 51, // 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, 52, 53, 54, 55, 56, 57, // B0
58, -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, 59, 60, 61, 62, 63, // D0
-1, 64, 65, 66, 67, -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));
VirtualKey::FillKbdState(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;
}
VirtualKey::FillKbdState(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).mLength == 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, nullptr);
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");
ModifierKeyState modKeyState(0);
UniCharsAndModifiers uniChars =
GetUniCharsAndModifiers(aNativeKeyCode, modKeyState);
if (uniChars.mLength != 1 ||
uniChars.mChars[0] < ' ' || uniChars.mChars[0] > 0x7F) {
modKeyState.Set(MODIFIER_SHIFT);
uniChars = GetUniCharsAndModifiers(aNativeKeyCode, modKeyState);
if (uniChars.mLength != 1 ||
uniChars.mChars[0] < ' ' || uniChars.mChars[0] > 0x7F) {
return 0;
}
}
return WidgetUtils::ComputeKeyCodeFromChar(uniChars.mChars[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;
}
/*****************************************************************************
* mozilla::widget::DeadKeyTable
*****************************************************************************/
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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