/* static */ void
KeymapWrapper::InitKeyEvent(nsKeyEvent& aKeyEvent,
                            GdkEventKey* aGdkKeyEvent)
{
    KeymapWrapper* keymapWrapper = GetInstance();

    aKeyEvent.mKeyNameIndex =
        keymapWrapper->ComputeDOMKeyNameIndex(aGdkKeyEvent);
    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.
    // Temporarily, we should compute the state only when the key event
    // is GDK_KEY_PRESS.
    // XXX If we could know the modifier keys state at the key release event,
    //     we should cut out changingMask from modifierState.
    guint modifierState = aGdkKeyEvent->state;
    if (aGdkKeyEvent->is_modifier && aGdkKeyEvent->type == GDK_KEY_PRESS) {
        ModifierKey* modifierKey =
            keymapWrapper->GetModifierKey(aGdkKeyEvent->hardware_keycode);
        if (modifierKey) {
            // If new modifier key is pressed, add the pressed mod mask.
            modifierState |= modifierKey->mMask;
        }
    }
    InitInputEvent(aKeyEvent, modifierState);

#ifdef MOZ_PLATFORM_MAEMO
    aKeyEvent.location = nsIDOMKeyEvent::DOM_KEY_LOCATION_MOBILE;
#else // #ifdef MOZ_PLATFORM_MAEMO
    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;
    }
#endif // #ifdef MOZ_PLATFORM_MAEMO #else

    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;
}