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nsGtkKeyUtils.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* 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 "prlog.h"
#include "nsGtkKeyUtils.h"
#include <gdk/gdkkeysyms.h>
#include <algorithm>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#if (MOZ_WIDGET_GTK == 3)
#include <gdk/gdkkeysyms-compat.h>
#endif
#include <X11/XKBlib.h>
#include "WidgetUtils.h"
#include "keysym2ucs.h"
#include "nsIBidiKeyboard.h"
#include "nsServiceManagerUtils.h"
#ifdef PR_LOGGING
PRLogModuleInfo* gKeymapWrapperLog = nullptr;
#endif // PR_LOGGING
#include "mozilla/ArrayUtils.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TextEvents.h"
namespace mozilla {
namespace widget {
#define IS_ASCII_ALPHABETICAL(key) \
((('a' <= key) && (key <= 'z')) || (('A' <= key) && (key <= 'Z')))
#define MOZ_MODIFIER_KEYS "MozKeymapWrapper"
KeymapWrapper* KeymapWrapper::sInstance = nullptr;
guint KeymapWrapper::sLastRepeatableHardwareKeyCode = 0;
KeymapWrapper::RepeatState KeymapWrapper::sRepeatState =
KeymapWrapper::NOT_PRESSED;
nsIBidiKeyboard* sBidiKeyboard = nullptr;
#ifdef PR_LOGGING
static const char* GetBoolName(bool aBool)
{
return aBool ? "TRUE" : "FALSE";
}
/* static */ const char*
KeymapWrapper::GetModifierName(Modifier aModifier)
{
switch (aModifier) {
case CAPS_LOCK: return "CapsLock";
case NUM_LOCK: return "NumLock";
case SCROLL_LOCK: return "ScrollLock";
case SHIFT: return "Shift";
case CTRL: return "Ctrl";
case ALT: return "Alt";
case SUPER: return "Super";
case HYPER: return "Hyper";
case META: return "Meta";
case LEVEL3: return "Level3";
case LEVEL5: return "Level5";
case NOT_MODIFIER: return "NotModifier";
default: return "InvalidValue";
}
}
#endif // PR_LOGGING
/* static */ KeymapWrapper::Modifier
KeymapWrapper::GetModifierForGDKKeyval(guint aGdkKeyval)
{
switch (aGdkKeyval) {
case GDK_Caps_Lock: return CAPS_LOCK;
case GDK_Num_Lock: return NUM_LOCK;
case GDK_Scroll_Lock: return SCROLL_LOCK;
case GDK_Shift_Lock:
case GDK_Shift_L:
case GDK_Shift_R: return SHIFT;
case GDK_Control_L:
case GDK_Control_R: return CTRL;
case GDK_Alt_L:
case GDK_Alt_R: return ALT;
case GDK_Super_L:
case GDK_Super_R: return SUPER;
case GDK_Hyper_L:
case GDK_Hyper_R: return HYPER;
case GDK_Meta_L:
case GDK_Meta_R: return META;
case GDK_ISO_Level3_Shift:
case GDK_Mode_switch: return LEVEL3;
case GDK_ISO_Level5_Shift: return LEVEL5;
default: return NOT_MODIFIER;
}
}
guint
KeymapWrapper::GetModifierMask(Modifier aModifier) const
{
switch (aModifier) {
case CAPS_LOCK:
return GDK_LOCK_MASK;
case NUM_LOCK:
return mModifierMasks[INDEX_NUM_LOCK];
case SCROLL_LOCK:
return mModifierMasks[INDEX_SCROLL_LOCK];
case SHIFT:
return GDK_SHIFT_MASK;
case CTRL:
return GDK_CONTROL_MASK;
case ALT:
return mModifierMasks[INDEX_ALT];
case SUPER:
return mModifierMasks[INDEX_SUPER];
case HYPER:
return mModifierMasks[INDEX_HYPER];
case META:
return mModifierMasks[INDEX_META];
case LEVEL3:
return mModifierMasks[INDEX_LEVEL3];
case LEVEL5:
return mModifierMasks[INDEX_LEVEL5];
default:
return 0;
}
}
KeymapWrapper::ModifierKey*
KeymapWrapper::GetModifierKey(guint aHardwareKeycode)
{
for (uint32_t i = 0; i < mModifierKeys.Length(); i++) {
ModifierKey& key = mModifierKeys[i];
if (key.mHardwareKeycode == aHardwareKeycode) {
return &key;
}
}
return nullptr;
}
/* static */ KeymapWrapper*
KeymapWrapper::GetInstance()
{
if (sInstance) {
sInstance->Init();
return sInstance;
}
sInstance = new KeymapWrapper();
return sInstance;
}
KeymapWrapper::KeymapWrapper() :
mInitialized(false), mGdkKeymap(gdk_keymap_get_default()),
mXKBBaseEventCode(0)
{
#ifdef PR_LOGGING
if (!gKeymapWrapperLog) {
gKeymapWrapperLog = PR_NewLogModule("KeymapWrapperWidgets");
}
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): Constructor, mGdkKeymap=%p",
this, mGdkKeymap));
#endif // PR_LOGGING
g_signal_connect(mGdkKeymap, "keys-changed",
(GCallback)OnKeysChanged, this);
// This is necessary for catching the destroying timing.
g_object_weak_ref(G_OBJECT(mGdkKeymap),
(GWeakNotify)OnDestroyKeymap, this);
InitXKBExtension();
Init();
}
void
KeymapWrapper::Init()
{
if (mInitialized) {
return;
}
mInitialized = true;
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): Init, mGdkKeymap=%p",
this, mGdkKeymap));
mModifierKeys.Clear();
memset(mModifierMasks, 0, sizeof(mModifierMasks));
InitBySystemSettings();
gdk_window_add_filter(nullptr, FilterEvents, this);
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): Init, CapsLock=0x%X, NumLock=0x%X, "
"ScrollLock=0x%X, Level3=0x%X, Level5=0x%X, "
"Shift=0x%X, Ctrl=0x%X, Alt=0x%X, Meta=0x%X, Super=0x%X, Hyper=0x%X",
this,
GetModifierMask(CAPS_LOCK), GetModifierMask(NUM_LOCK),
GetModifierMask(SCROLL_LOCK), GetModifierMask(LEVEL3),
GetModifierMask(LEVEL5),
GetModifierMask(SHIFT), GetModifierMask(CTRL),
GetModifierMask(ALT), GetModifierMask(META),
GetModifierMask(SUPER), GetModifierMask(HYPER)));
}
void
KeymapWrapper::InitXKBExtension()
{
PodZero(&mKeyboardState);
int xkbMajorVer = XkbMajorVersion;
int xkbMinorVer = XkbMinorVersion;
if (!XkbLibraryVersion(&xkbMajorVer, &xkbMinorVer)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension failed due to failure of "
"XkbLibraryVersion()", this));
return;
}
Display* display =
gdk_x11_display_get_xdisplay(gdk_display_get_default());
// XkbLibraryVersion() set xkbMajorVer and xkbMinorVer to that of the
// library, which may be newer than what is required of the server in
// XkbQueryExtension(), so these variables should be reset to
// XkbMajorVersion and XkbMinorVersion before the XkbQueryExtension call.
xkbMajorVer = XkbMajorVersion;
xkbMinorVer = XkbMinorVersion;
int opcode, baseErrorCode;
if (!XkbQueryExtension(display, &opcode, &mXKBBaseEventCode, &baseErrorCode,
&xkbMajorVer, &xkbMinorVer)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension failed due to failure of "
"XkbQueryExtension(), display=0x%p", this, display));
return;
}
if (!XkbSelectEventDetails(display, XkbUseCoreKbd, XkbStateNotify,
XkbModifierStateMask, XkbModifierStateMask)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension failed due to failure of "
"XkbSelectEventDetails() for XModifierStateMask, display=0x%p",
this, display));
return;
}
if (!XkbSelectEventDetails(display, XkbUseCoreKbd, XkbControlsNotify,
XkbPerKeyRepeatMask, XkbPerKeyRepeatMask)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension failed due to failure of "
"XkbSelectEventDetails() for XkbControlsNotify, display=0x%p",
this, display));
return;
}
if (!XGetKeyboardControl(display, &mKeyboardState)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension failed due to failure of "
"XGetKeyboardControl(), display=0x%p",
this, display));
return;
}
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitXKBExtension, Succeeded", this));
}
void
KeymapWrapper::InitBySystemSettings()
{
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, mGdkKeymap=%p",
this, mGdkKeymap));
Display* display =
gdk_x11_display_get_xdisplay(gdk_display_get_default());
int min_keycode = 0;
int max_keycode = 0;
XDisplayKeycodes(display, &min_keycode, &max_keycode);
int keysyms_per_keycode = 0;
KeySym* xkeymap = XGetKeyboardMapping(display, min_keycode,
max_keycode - min_keycode + 1,
&keysyms_per_keycode);
if (!xkeymap) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, "
"Failed due to null xkeymap", this));
return;
}
XModifierKeymap* xmodmap = XGetModifierMapping(display);
if (!xmodmap) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, "
"Failed due to null xmodmap", this));
XFree(xkeymap);
return;
}
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, min_keycode=%d, "
"max_keycode=%d, keysyms_per_keycode=%d, max_keypermod=%d",
this, min_keycode, max_keycode, keysyms_per_keycode,
xmodmap->max_keypermod));
// The modifiermap member of the XModifierKeymap structure contains 8 sets
// of max_keypermod KeyCodes, one for each modifier in the order Shift,
// Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5.
// Only nonzero KeyCodes have meaning in each set, and zero KeyCodes are
// ignored.
// Note that two or more modifiers may use one modifier flag. E.g.,
// on Ubuntu 10.10, Alt and Meta share the Mod1 in default settings.
// And also Super and Hyper share the Mod4. In such cases, we need to
// decide which modifier flag means one of DOM modifiers.
// mod[0] is Modifier introduced by Mod1.
Modifier mod[5];
int32_t foundLevel[5];
for (uint32_t i = 0; i < ArrayLength(mod); i++) {
mod[i] = NOT_MODIFIER;
foundLevel[i] = INT32_MAX;
}
const uint32_t map_size = 8 * xmodmap->max_keypermod;
for (uint32_t i = 0; i < map_size; i++) {
KeyCode keycode = xmodmap->modifiermap[i];
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, "
" i=%d, keycode=0x%08X",
this, i, keycode));
if (!keycode || keycode < min_keycode || keycode > max_keycode) {
continue;
}
ModifierKey* modifierKey = GetModifierKey(keycode);
if (!modifierKey) {
modifierKey = mModifierKeys.AppendElement(ModifierKey(keycode));
}
const KeySym* syms =
xkeymap + (keycode - min_keycode) * keysyms_per_keycode;
const uint32_t bit = i / xmodmap->max_keypermod;
modifierKey->mMask |= 1 << bit;
// We need to know the meaning of Mod1, Mod2, Mod3, Mod4 and Mod5.
// Let's skip if current map is for others.
if (bit < 3) {
continue;
}
const int32_t modIndex = bit - 3;
for (int32_t j = 0; j < keysyms_per_keycode; j++) {
Modifier modifier = GetModifierForGDKKeyval(syms[j]);
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitBySystemSettings, "
" Mod%d, j=%d, syms[j]=%s(0x%X), modifier=%s",
this, modIndex + 1, j, gdk_keyval_name(syms[j]), syms[j],
GetModifierName(modifier)));
switch (modifier) {
case NOT_MODIFIER:
// Don't overwrite the stored information with
// NOT_MODIFIER.
break;
case CAPS_LOCK:
case SHIFT:
case CTRL:
// Ignore the modifiers defined in GDK spec. They shouldn't
// be mapped to Mod1-5 because they must not work on native
// GTK applications.
break;
default:
// If new modifier is found in higher level than stored
// value, we don't need to overwrite it.
if (j > foundLevel[modIndex]) {
break;
}
// If new modifier is more important than stored value,
// we should overwrite it with new modifier.
if (j == foundLevel[modIndex]) {
mod[modIndex] = std::min(modifier, mod[modIndex]);
break;
}
foundLevel[modIndex] = j;
mod[modIndex] = modifier;
break;
}
}
}
for (uint32_t i = 0; i < COUNT_OF_MODIFIER_INDEX; i++) {
Modifier modifier;
switch (i) {
case INDEX_NUM_LOCK:
modifier = NUM_LOCK;
break;
case INDEX_SCROLL_LOCK:
modifier = SCROLL_LOCK;
break;
case INDEX_ALT:
modifier = ALT;
break;
case INDEX_META:
modifier = META;
break;
case INDEX_SUPER:
modifier = SUPER;
break;
case INDEX_HYPER:
modifier = HYPER;
break;
case INDEX_LEVEL3:
modifier = LEVEL3;
break;
case INDEX_LEVEL5:
modifier = LEVEL5;
break;
default:
MOZ_CRASH("All indexes must be handled here");
}
for (uint32_t j = 0; j < ArrayLength(mod); j++) {
if (modifier == mod[j]) {
mModifierMasks[i] |= 1 << (j + 3);
}
}
}
XFreeModifiermap(xmodmap);
XFree(xkeymap);
}
KeymapWrapper::~KeymapWrapper()
{
gdk_window_remove_filter(nullptr, FilterEvents, this);
NS_IF_RELEASE(sBidiKeyboard);
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): Destructor", this));
}
/* static */ GdkFilterReturn
KeymapWrapper::FilterEvents(GdkXEvent* aXEvent,
GdkEvent* aGdkEvent,
gpointer aData)
{
XEvent* xEvent = static_cast<XEvent*>(aXEvent);
switch (xEvent->type) {
case KeyPress: {
// If the key doesn't support auto repeat, ignore the event because
// even if such key (e.g., Shift) is pressed during auto repeat of
// anoter key, it doesn't stop the auto repeat.
KeymapWrapper* self = static_cast<KeymapWrapper*>(aData);
if (!self->IsAutoRepeatableKey(xEvent->xkey.keycode)) {
break;
}
if (sRepeatState == NOT_PRESSED) {
sRepeatState = FIRST_PRESS;
} else if (sLastRepeatableHardwareKeyCode == xEvent->xkey.keycode) {
sRepeatState = REPEATING;
} else {
// If a different key is pressed while another key is pressed,
// auto repeat system repeats only the last pressed key.
// So, setting new keycode and setting repeat state as first key
// press should work fine.
sRepeatState = FIRST_PRESS;
}
sLastRepeatableHardwareKeyCode = xEvent->xkey.keycode;
break;
}
case KeyRelease: {
if (sLastRepeatableHardwareKeyCode != xEvent->xkey.keycode) {
// This case means the key release event is caused by
// a non-repeatable key such as Shift or a repeatable key that
// was pressed before sLastRepeatableHardwareKeyCode was
// pressed.
break;
}
sRepeatState = NOT_PRESSED;
break;
}
case FocusOut: {
// At moving focus, we should reset keyboard repeat state.
// Strictly, this causes incorrect behavior. However, this
// correctness must be enough for web applications.
sRepeatState = NOT_PRESSED;
break;
}
default: {
KeymapWrapper* self = static_cast<KeymapWrapper*>(aData);
if (xEvent->type != self->mXKBBaseEventCode) {
break;
}
XkbEvent* xkbEvent = (XkbEvent*)xEvent;
if (xkbEvent->any.xkb_type != XkbControlsNotify ||
!(xkbEvent->ctrls.changed_ctrls & XkbPerKeyRepeatMask)) {
break;
}
if (!XGetKeyboardControl(xkbEvent->any.display,
&self->mKeyboardState)) {
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): FilterEvents failed due to failure "
"of XGetKeyboardControl(), display=0x%p",
self, xkbEvent->any.display));
}
break;
}
}
return GDK_FILTER_CONTINUE;
}
/* static */ void
KeymapWrapper::OnDestroyKeymap(KeymapWrapper* aKeymapWrapper,
GdkKeymap *aGdkKeymap)
{
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper: OnDestroyKeymap, aGdkKeymap=%p, aKeymapWrapper=%p",
aGdkKeymap, aKeymapWrapper));
MOZ_ASSERT(aKeymapWrapper == sInstance,
"Desroying unexpected instance");
delete sInstance;
sInstance = nullptr;
}
/* static */ void
KeymapWrapper::OnKeysChanged(GdkKeymap *aGdkKeymap,
KeymapWrapper* aKeymapWrapper)
{
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper: OnKeysChanged, aGdkKeymap=%p, aKeymapWrapper=%p",
aGdkKeymap, aKeymapWrapper));
MOZ_ASSERT(sInstance == aKeymapWrapper,
"This instance must be the singleton instance");
// We cannot reintialize here becasue we don't have GdkWindow which is using
// the GdkKeymap. We'll reinitialize it when next GetInstance() is called.
sInstance->mInitialized = false;
// Reset the bidi keyboard settings for the new GdkKeymap
if (!sBidiKeyboard) {
CallGetService("@mozilla.org/widget/bidikeyboard;1", &sBidiKeyboard);
}
if (sBidiKeyboard) {
sBidiKeyboard->Reset();
}
}
/* static */ guint
KeymapWrapper::GetCurrentModifierState()
{
GdkModifierType modifiers;
gdk_display_get_pointer(gdk_display_get_default(),
nullptr, nullptr, nullptr, &modifiers);
return static_cast<guint>(modifiers);
}
/* static */ bool
KeymapWrapper::AreModifiersCurrentlyActive(Modifiers aModifiers)
{
guint modifierState = GetCurrentModifierState();
return AreModifiersActive(aModifiers, modifierState);
}
/* static */ bool
KeymapWrapper::AreModifiersActive(Modifiers aModifiers,
guint aModifierState)
{
NS_ENSURE_TRUE(aModifiers, false);
KeymapWrapper* keymapWrapper = GetInstance();
for (uint32_t i = 0; i < sizeof(Modifier) * 8 && aModifiers; i++) {
Modifier modifier = static_cast<Modifier>(1 << i);
if (!(aModifiers & modifier)) {
continue;
}
if (!(aModifierState & keymapWrapper->GetModifierMask(modifier))) {
return false;
}
aModifiers &= ~modifier;
}
return true;
}
/* static */ void
KeymapWrapper::InitInputEvent(WidgetInputEvent& aInputEvent,
guint aModifierState)
{
KeymapWrapper* keymapWrapper = GetInstance();
aInputEvent.modifiers = 0;
// DOM Meta key should be TRUE only on Mac. We need to discuss this
// issue later.
if (keymapWrapper->AreModifiersActive(SHIFT, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_SHIFT;
}
if (keymapWrapper->AreModifiersActive(CTRL, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_CONTROL;
}
if (keymapWrapper->AreModifiersActive(ALT, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_ALT;
}
if (keymapWrapper->AreModifiersActive(META, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_META;
}
if (keymapWrapper->AreModifiersActive(SUPER, aModifierState) ||
keymapWrapper->AreModifiersActive(HYPER, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_OS;
}
if (keymapWrapper->AreModifiersActive(LEVEL3, aModifierState) ||
keymapWrapper->AreModifiersActive(LEVEL5, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_ALTGRAPH;
}
if (keymapWrapper->AreModifiersActive(CAPS_LOCK, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_CAPSLOCK;
}
if (keymapWrapper->AreModifiersActive(NUM_LOCK, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_NUMLOCK;
}
if (keymapWrapper->AreModifiersActive(SCROLL_LOCK, aModifierState)) {
aInputEvent.modifiers |= MODIFIER_SCROLLLOCK;
}
PR_LOG(gKeymapWrapperLog, PR_LOG_DEBUG,
("KeymapWrapper(%p): InitInputEvent, aModifierState=0x%08X, "
"aInputEvent.modifiers=0x%04X (Shift: %s, Control: %s, Alt: %s, "
"Meta: %s, OS: %s, AltGr: %s, "
"CapsLock: %s, NumLock: %s, ScrollLock: %s)",
keymapWrapper, aModifierState, aInputEvent.modifiers,
GetBoolName(aInputEvent.modifiers & MODIFIER_SHIFT),
GetBoolName(aInputEvent.modifiers & MODIFIER_CONTROL),
GetBoolName(aInputEvent.modifiers & MODIFIER_ALT),
GetBoolName(aInputEvent.modifiers & MODIFIER_META),
GetBoolName(aInputEvent.modifiers & MODIFIER_OS),
GetBoolName(aInputEvent.modifiers & MODIFIER_ALTGRAPH),
GetBoolName(aInputEvent.modifiers & MODIFIER_CAPSLOCK),
GetBoolName(aInputEvent.modifiers & MODIFIER_NUMLOCK),
GetBoolName(aInputEvent.modifiers & MODIFIER_SCROLLLOCK)));
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:
break;
default:
return;
}
WidgetMouseEventBase& mouseEvent = *aInputEvent.AsMouseEventBase();
mouseEvent.buttons = 0;
if (aModifierState & GDK_BUTTON1_MASK) {
mouseEvent.buttons |= WidgetMouseEvent::eLeftButtonFlag;
}
if (aModifierState & GDK_BUTTON3_MASK) {
mouseEvent.buttons |= WidgetMouseEvent::eRightButtonFlag;
}
if (aModifierState & GDK_BUTTON2_MASK) {
mouseEvent.buttons |= WidgetMouseEvent::eMiddleButtonFlag;
}
PR_LOG(gKeymapWrapperLog, PR_LOG_DEBUG,
("KeymapWrapper(%p): InitInputEvent, aInputEvent has buttons, "
"aInputEvent.buttons=0x%04X (Left: %s, Right: %s, Middle: %s, "
"4th (BACK): %s, 5th (FORWARD): %s)",
keymapWrapper, mouseEvent.buttons,
GetBoolName(mouseEvent.buttons & WidgetMouseEvent::eLeftButtonFlag),
GetBoolName(mouseEvent.buttons & WidgetMouseEvent::eRightButtonFlag),
GetBoolName(mouseEvent.buttons & WidgetMouseEvent::eMiddleButtonFlag),
GetBoolName(mouseEvent.buttons & WidgetMouseEvent::e4thButtonFlag),
GetBoolName(mouseEvent.buttons & WidgetMouseEvent::e5thButtonFlag)));
}
/* static */ uint32_t
KeymapWrapper::ComputeDOMKeyCode(const GdkEventKey* aGdkKeyEvent)
{
// If the keyval indicates it's a modifier key, we should use unshifted
// key's modifier keyval.
guint keyval = aGdkKeyEvent->keyval;
if (GetModifierForGDKKeyval(keyval)) {
// But if the keyval without modifiers isn't a modifier key, we
// shouldn't use it. E.g., Japanese keyboard layout's
// Shift + Eisu-Toggle key is CapsLock. This is an actual rare case,
// Windows uses different keycode for a physical key for different
// shift key state.
guint keyvalWithoutModifier = GetGDKKeyvalWithoutModifier(aGdkKeyEvent);
if (GetModifierForGDKKeyval(keyvalWithoutModifier)) {
keyval = keyvalWithoutModifier;
}
// Note that the modifier keycode and activating or deactivating
// modifier flag may be mismatched, but it's okay. If a DOM key
// event handler is testing a keydown event, it's more likely being
// used to test which key is being pressed than to test which
// modifier will become active. So, if we computed DOM keycode
// from modifier flag which were changing by the physical key, then
// there would be no other way for the user to generate the original
// keycode.
uint32_t DOMKeyCode = GetDOMKeyCodeFromKeyPairs(keyval);
NS_ASSERTION(DOMKeyCode, "All modifier keys must have a DOM keycode");
return DOMKeyCode;
}
// If the key isn't printable, let's look at the key pairs.
uint32_t charCode = GetCharCodeFor(aGdkKeyEvent);
if (!charCode) {
// Always use unshifted keycode for the non-printable key.
// XXX It might be better to decide DOM keycode from all keyvals of
// the hardware keycode. However, I think that it's too excessive.
guint keyvalWithoutModifier = GetGDKKeyvalWithoutModifier(aGdkKeyEvent);
uint32_t DOMKeyCode = GetDOMKeyCodeFromKeyPairs(keyvalWithoutModifier);
if (!DOMKeyCode) {
// If the unshifted keyval couldn't be mapped to a DOM keycode,
// we should fallback to legacy logic, so, we should recompute with
// the keyval with aGdkKeyEvent.
DOMKeyCode = GetDOMKeyCodeFromKeyPairs(keyval);
}
return DOMKeyCode;
}
// printable numpad keys should be resolved here.
switch (keyval) {
case GDK_KP_Multiply: return NS_VK_MULTIPLY;
case GDK_KP_Add: return NS_VK_ADD;
case GDK_KP_Separator: return NS_VK_SEPARATOR;
case GDK_KP_Subtract: return NS_VK_SUBTRACT;
case GDK_KP_Decimal: return NS_VK_DECIMAL;
case GDK_KP_Divide: return NS_VK_DIVIDE;
case GDK_KP_0: return NS_VK_NUMPAD0;
case GDK_KP_1: return NS_VK_NUMPAD1;
case GDK_KP_2: return NS_VK_NUMPAD2;
case GDK_KP_3: return NS_VK_NUMPAD3;
case GDK_KP_4: return NS_VK_NUMPAD4;
case GDK_KP_5: return NS_VK_NUMPAD5;
case GDK_KP_6: return NS_VK_NUMPAD6;
case GDK_KP_7: return NS_VK_NUMPAD7;
case GDK_KP_8: return NS_VK_NUMPAD8;
case GDK_KP_9: return NS_VK_NUMPAD9;
}
KeymapWrapper* keymapWrapper = GetInstance();
// Ignore all modifier state except NumLock.
guint baseState =
(aGdkKeyEvent->state & keymapWrapper->GetModifierMask(NUM_LOCK));
// Basically, we should use unmodified character for deciding our keyCode.
uint32_t unmodifiedChar =
keymapWrapper->GetCharCodeFor(aGdkKeyEvent, baseState,
aGdkKeyEvent->group);
if (IsBasicLatinLetterOrNumeral(unmodifiedChar)) {
// If the unmodified character is an ASCII alphabet or an ASCII
// numeric, it's the best hint for deciding our keyCode.
return WidgetUtils::ComputeKeyCodeFromChar(unmodifiedChar);
}
// If the unmodified character is not an ASCII character, that means we
// couldn't find the hint. We should reset it.
if (unmodifiedChar > 0x7F) {
unmodifiedChar = 0;
}
// Retry with shifted keycode.
guint shiftState = (baseState | keymapWrapper->GetModifierMask(SHIFT));
uint32_t shiftedChar =
keymapWrapper->GetCharCodeFor(aGdkKeyEvent, shiftState,
aGdkKeyEvent->group);
if (IsBasicLatinLetterOrNumeral(shiftedChar)) {
// A shifted character can be an ASCII alphabet on Hebrew keyboard
// layout. And also shifted character can be an ASCII numeric on
// AZERTY keyboad layout. Then, it's a good hint for deciding our
// keyCode.
return WidgetUtils::ComputeKeyCodeFromChar(shiftedChar);
}
// If the shifted unmodified character isn't an ASCII character, we should
// discard it too.
if (shiftedChar > 0x7F) {
shiftedChar = 0;
}
// If current keyboard layout isn't ASCII alphabet inputtable layout,
// look for ASCII alphabet inputtable keyboard layout. If the key
// inputs an ASCII alphabet or an ASCII numeric, we should use it
// for deciding our keyCode.
// Note that it's important not to use alternative keyboard layout for ASCII
// alphabet inputabble keyboard layout because the keycode for the key with
// alternative keyboard layout may conflict with another key on current
// keyboard layout.
if (!keymapWrapper->IsLatinGroup(aGdkKeyEvent->group)) {
gint minGroup = keymapWrapper->GetFirstLatinGroup();
if (minGroup >= 0) {
uint32_t unmodCharLatin =
keymapWrapper->GetCharCodeFor(aGdkKeyEvent, baseState,
minGroup);
if (IsBasicLatinLetterOrNumeral(unmodCharLatin)) {
// If the unmodified character is an ASCII alphabet or
// an ASCII numeric, we should use it for the keyCode.
return WidgetUtils::ComputeKeyCodeFromChar(unmodCharLatin);
}
uint32_t shiftedCharLatin =
keymapWrapper->GetCharCodeFor(aGdkKeyEvent, shiftState,
minGroup);
if (IsBasicLatinLetterOrNumeral(shiftedCharLatin)) {
// If the shifted character is an ASCII alphabet or an ASCII
// numeric, we should use it for the keyCode.
return WidgetUtils::ComputeKeyCodeFromChar(shiftedCharLatin);
}
}
}
// If unmodified character is in ASCII range, use it. Otherwise, use
// shifted character.
if (!unmodifiedChar && !shiftedChar) {
return 0;
}
return WidgetUtils::ComputeKeyCodeFromChar(
unmodifiedChar ? unmodifiedChar : shiftedChar);
}
KeyNameIndex
KeymapWrapper::ComputeDOMKeyNameIndex(const GdkEventKey* aGdkKeyEvent)
{
switch (aGdkKeyEvent->keyval) {
#define NS_NATIVE_KEY_TO_DOM_KEY_NAME_INDEX(aNativeKey, aKeyNameIndex) \
case aNativeKey: return aKeyNameIndex;
#include "NativeKeyToDOMKeyName.h"
#undef NS_NATIVE_KEY_TO_DOM_KEY_NAME_INDEX
default:
break;
}
return KEY_NAME_INDEX_Unidentified;
}
/* static */ void
KeymapWrapper::InitKeyEvent(WidgetKeyboardEvent& aKeyEvent,
GdkEventKey* aGdkKeyEvent)
{
KeymapWrapper* keymapWrapper = GetInstance();
aKeyEvent.mKeyNameIndex =
keymapWrapper->ComputeDOMKeyNameIndex(aGdkKeyEvent);
if (aKeyEvent.mKeyNameIndex == KEY_NAME_INDEX_Unidentified) {
uint32_t charCode = GetCharCodeFor(aGdkKeyEvent);
if (!charCode) {
charCode = keymapWrapper->GetUnmodifiedCharCodeFor(aGdkKeyEvent);
}
if (charCode) {
aKeyEvent.mKeyNameIndex = KEY_NAME_INDEX_USE_STRING;
MOZ_ASSERT(aKeyEvent.mKeyValue.IsEmpty(),
"Uninitialized mKeyValue must be empty");
AppendUCS4ToUTF16(charCode, aKeyEvent.mKeyValue);
}
}
aKeyEvent.keyCode = ComputeDOMKeyCode(aGdkKeyEvent);
// NOTE: The state of given key event indicates adjacent state of
// modifier keys. E.g., even if the event is Shift key press event,
// the bit for Shift is still false. By the same token, even if the
// event is Shift key release event, the bit for Shift is still true.
// Unfortunately, gdk_keyboard_get_modifiers() returns current modifier
// state. It means if there're some pending modifier key press or
// key release events, the result isn't what we want.
guint modifierState = aGdkKeyEvent->state;
if (aGdkKeyEvent->is_modifier) {
Display* display =
gdk_x11_display_get_xdisplay(gdk_display_get_default());
if (XEventsQueued(display, QueuedAfterReading)) {
XEvent nextEvent;
XPeekEvent(display, &nextEvent);
if (nextEvent.type == keymapWrapper->mXKBBaseEventCode) {
XkbEvent* XKBEvent = (XkbEvent*)&nextEvent;
if (XKBEvent->any.xkb_type == XkbStateNotify) {
XkbStateNotifyEvent* stateNotifyEvent =
(XkbStateNotifyEvent*)XKBEvent;
modifierState &= ~0xFF;
modifierState |= stateNotifyEvent->lookup_mods;
}
}
}
}
InitInputEvent(aKeyEvent, modifierState);
switch (aGdkKeyEvent->keyval) {
case GDK_Shift_L:
case GDK_Control_L:
case GDK_Alt_L:
case GDK_Super_L:
case GDK_Hyper_L:
case GDK_Meta_L:
aKeyEvent.location = nsIDOMKeyEvent::DOM_KEY_LOCATION_LEFT;
break;
case GDK_Shift_R:
case GDK_Control_R:
case GDK_Alt_R:
case GDK_Super_R:
case GDK_Hyper_R:
case GDK_Meta_R:
aKeyEvent.location = nsIDOMKeyEvent::DOM_KEY_LOCATION_RIGHT;
break;
case GDK_KP_0:
case GDK_KP_1:
case GDK_KP_2:
case GDK_KP_3:
case GDK_KP_4:
case GDK_KP_5:
case GDK_KP_6:
case GDK_KP_7:
case GDK_KP_8:
case GDK_KP_9:
case GDK_KP_Space:
case GDK_KP_Tab:
case GDK_KP_Enter:
case GDK_KP_F1:
case GDK_KP_F2:
case GDK_KP_F3:
case GDK_KP_F4:
case GDK_KP_Home:
case GDK_KP_Left:
case GDK_KP_Up:
case GDK_KP_Right:
case GDK_KP_Down:
case GDK_KP_Prior: // same as GDK_KP_Page_Up
case GDK_KP_Next: // same as GDK_KP_Page_Down
case GDK_KP_End:
case GDK_KP_Begin:
case GDK_KP_Insert:
case GDK_KP_Delete:
case GDK_KP_Equal:
case GDK_KP_Multiply:
case GDK_KP_Add:
case GDK_KP_Separator:
case GDK_KP_Subtract:
case GDK_KP_Decimal:
case GDK_KP_Divide:
aKeyEvent.location = nsIDOMKeyEvent::DOM_KEY_LOCATION_NUMPAD;
break;
default:
aKeyEvent.location = nsIDOMKeyEvent::DOM_KEY_LOCATION_STANDARD;
break;
}
PR_LOG(gKeymapWrapperLog, PR_LOG_ALWAYS,
("KeymapWrapper(%p): InitKeyEvent, modifierState=0x%08X "
"aGdkKeyEvent={ type=%s, keyval=%s(0x%X), state=0x%08X, "
"hardware_keycode=0x%08X, is_modifier=%s } "
"aKeyEvent={ message=%s, isShift=%s, isControl=%s, "
"isAlt=%s, isMeta=%s }",
keymapWrapper, modifierState,
((aGdkKeyEvent->type == GDK_KEY_PRESS) ?
"GDK_KEY_PRESS" : "GDK_KEY_RELEASE"),
gdk_keyval_name(aGdkKeyEvent->keyval),
aGdkKeyEvent->keyval, aGdkKeyEvent->state,
aGdkKeyEvent->hardware_keycode,
GetBoolName(aGdkKeyEvent->is_modifier),
((aKeyEvent.message == NS_KEY_DOWN) ? "NS_KEY_DOWN" :
(aKeyEvent.message == NS_KEY_PRESS) ? "NS_KEY_PRESS" :
"NS_KEY_UP"),
GetBoolName(aKeyEvent.IsShift()), GetBoolName(aKeyEvent.IsControl()),
GetBoolName(aKeyEvent.IsAlt()), GetBoolName(aKeyEvent.IsMeta())));
if (aKeyEvent.message == NS_KEY_PRESS) {
keymapWrapper->InitKeypressEvent(aKeyEvent, aGdkKeyEvent);
}
// The transformations above and in gdk for the keyval are not invertible
// so link to the GdkEvent (which will vanish soon after return from the
// event callback) to give plugins access to hardware_keycode and state.
// (An XEvent would be nice but the GdkEvent is good enough.)
aKeyEvent.pluginEvent = (void *)aGdkKeyEvent;
aKeyEvent.time = aGdkKeyEvent->time;
aKeyEvent.mNativeKeyEvent = static_cast<void*>(aGdkKeyEvent);
aKeyEvent.mIsRepeat = sRepeatState == REPEATING &&
aGdkKeyEvent->hardware_keycode == sLastRepeatableHardwareKeyCode;
}
/* static */ uint32_t
KeymapWrapper::GetCharCodeFor(const GdkEventKey *aGdkKeyEvent)
{
// Anything above 0xf000 is considered a non-printable
// Exception: directly encoded UCS characters
if (aGdkKeyEvent->keyval > 0xf000 &&
(aGdkKeyEvent->keyval & 0xff000000) != 0x01000000) {