File: unikey_instance.cpp

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scim-unikey 0.3.1+debian-3.1
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/**
   Scim-Unikey Input Method

   Copyright (C) 2008-2009 Ubuntu-VN <http://www.ubuntu-vn.org>
   Author: Le Quoc Tuan <mr.lequoctuan@gmail.com>
   Home: http://scim-unikey.googlecode.com
   License: GNU LESSER GENERAL PUBLIC LICENSE v2.1
*/

#define Uses_SCIM_IMENGINE
#define Uses_SCIM_ICONV
#define Uses_SCIM_CONFIG_BASE
#define Uses_SCIM_CONFIG_PATH

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <libintl.h>
#define _(String) dgettext(PACKAGE_NAME,String)

#include <scim.h>
#include "scim_unikey_const.h"
#include "utils.h"
#include "im_engine.h"

#include <string.h>
#include "unikey.h"
#include "vnconv.h"

static unsigned char WordBreakSyms[] =
{
    ',', ';', ':', '.', '!', '?', ' ', '<', '>', '=', '+', '-', '*', '/', '_', '~',
    '`', '@', '#', '$', '%', '^', '&', '(', ')', '{', '}', '[', ']', '|', '\"', '\'', '\\',
};

static unsigned char WordAutoCommit[] =
{
    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
    'b', 'c', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n',
    'p', 'q', 'r', 's', 't', 'v', 'x', 'z',
    'B', 'C', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N',
    'P', 'Q', 'R', 'S', 'T', 'V', 'X', 'Z'
};
const String          Unikey_IMNames[]    = {"Telex", "Vni", "STelex", "STelex2"};
const UkInputMethod   Unikey_IM[]         = {UkTelex, UkVni, UkSimpleTelex, UkSimpleTelex2};
const unsigned int    NUM_INPUTMETHOD     = sizeof(Unikey_IM)/sizeof(Unikey_IM[0]);

const String          Unikey_OCNames[]    = {"Unicode",
                                             "TCVN3",
                                             "VNI Win",
                                             "VIQR",
                                             "CString",
                                             "NCR Decimal",
                                             "NCR Hex"};
const unsigned int    Unikey_OC[]         = {CONV_CHARSET_XUTF8,
                                             CONV_CHARSET_TCVN3,
                                             CONV_CHARSET_VNIWIN,
                                             CONV_CHARSET_VIQR,
                                             CONV_CHARSET_UNI_CSTRING,
                                             CONV_CHARSET_UNIREF,
                                             CONV_CHARSET_UNIREF_HEX};
const unsigned int    NUM_OUTPUTCHARSET   = sizeof(Unikey_OC)/sizeof(Unikey_OC[0]);

extern ConfigPointer __config;

/*************************************************
**************** Unikey Instance *****************
*************************************************/
UnikeyInstance::UnikeyInstance(UnikeyFactory *factory, const String& encoding, int id)
        :IMEngineInstanceBase(factory, encoding, id)
{
    static bool t, o;  //temp variable

    CreateDefaultUnikeyOptions(&m_ukopt);

    /* Read config
       if can't read config, set it to default value*/

    t = __config->read(SCIM_IMENGINE_UNIKEY_INPUTMETHOD, &m_im);
    if (!t) m_im = 0;

    t = __config->read(SCIM_IMENGINE_UNIKEY_OUTPUTCHARSET, &m_oc);
    if (!t) m_oc = 0;

    t = __config->read(SCIM_IMENGINE_UNIKEY_PROCESSWATWORDBEGIN, &o);
    m_process_w_AtBeginWord = t?o:SCIM_IMENGINE_UNIKEY_PROCESSWATWORDBEGIN_DEF;

// Unikey Options
    t = __config->read(SCIM_IMENGINE_UNIKEY_FREEMARKING, &o);
    m_ukopt.freeMarking = t?o:SCIM_IMENGINE_UNIKEY_FREEMARKING_DEF;

    t = __config->read(SCIM_IMENGINE_UNIKEY_MODERNSTYLE, &o);
    m_ukopt.modernStyle = t?o:SCIM_IMENGINE_UNIKEY_MODERNSTYLE_DEF;

    t = __config->read(SCIM_IMENGINE_UNIKEY_MACROENABLED, &o);
    m_ukopt.macroEnabled = t?o:SCIM_IMENGINE_UNIKEY_MACROENABLED_DEF;

    t = __config->read(SCIM_IMENGINE_UNIKEY_SPELLCHECKENABLED, &o);
    m_ukopt.spellCheckEnabled = t?o:SCIM_IMENGINE_UNIKEY_SPELLCHECKENABLED_DEF;

    t = __config->read(SCIM_IMENGINE_UNIKEY_AUTONONVNRESTORE, &o);
    m_ukopt.autoNonVnRestore = t?o:SCIM_IMENGINE_UNIKEY_AUTONONVNRESTORE_DEF;

    UnikeySetOptions(&m_ukopt);

    if (m_ukopt.macroEnabled)
    {
        UnikeyLoadMacroTable(getMacroFile());
    }
};

UnikeyInstance::~UnikeyInstance()
{
};

void UnikeyInstance::reset()
{
    UnikeyResetBuf();

    m_lastkey_with_shift = false;
}

void UnikeyInstance::focus_in()
{
    UnikeySetInputMethod(Unikey_IM[m_im]);
    UnikeySetOutputCharset(Unikey_OC[m_oc]);
    UnikeySetOptions(&m_ukopt);
}

PropertyList UnikeyInstance::CreatePropertyList()
{
    PropertyList props;
    uint i;

    Property prop("", "", "", "");

// input method
    prop.set_key("/Unikey/InputMethod");
    prop.set_label(Unikey_IMNames[m_im]);
    prop.set_icon("");
    prop.set_tip(_("Choose input method"));
    props.push_back(prop);

    for (i=0; i<NUM_INPUTMETHOD; i++)
    {
        prop.set_key(String("/Unikey/InputMethod/") + Unikey_IMNames[i] + String((uint)m_im==i?"-Checked":""));
        prop.set_label(Unikey_IMNames[i]);
        prop.set_icon((uint)m_im==i?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
        prop.set_tip("");
        props.push_back(prop);
    }

// output charset

    prop.set_key("/Unikey/OutputCharset");
    prop.set_label(Unikey_OCNames[m_oc]);
    prop.set_icon("");
    prop.set_tip(_("Choose output charset"));
    props.push_back(prop);

    for (i=0; i<NUM_OUTPUTCHARSET; i++)
    {
        prop.set_key(String("/Unikey/OutputCharset/") + Unikey_OCNames[i] + String((uint)m_oc==i?"-Checked":""));
        prop.set_label(Unikey_OCNames[i]);
        prop.set_icon((uint)m_oc==i?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
        prop.set_tip("");
        props.push_back(prop);
    }

// unikey options
    // menu
    prop.set_key("/Unikey/Options");
    prop.set_label(_("Options"));
    prop.set_icon(SCIM_ICONDIR SCIM_UNIKEY_ICON_CONFIGURE);
    prop.set_tip(_("Configure Unikey here"));
    props.push_back(prop);

    // spellcheck
    prop.set_key(m_ukopt.spellCheckEnabled?
                 "/Unikey/Options/SpellCheck/Disable":"/Unikey/Options/SpellCheck/Enable");
    prop.set_label(_("Enable spell check"));
    prop.set_icon(m_ukopt.spellCheckEnabled?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip(_("If enable, you can decrease mistake when typing"));
    props.push_back(prop);
    
    // auto restore keystroke
    prop.set_key(m_ukopt.autoNonVnRestore?
                 "/Unikey/Options/AutoRestoreKeys/Disable":"/Unikey/Options/AutoRestoreKeys/Enable");
    prop.set_label(_("Auto restore keys with invalid words"));
    prop.set_icon(m_ukopt.autoNonVnRestore?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip(_("When typing a word not in Vietnamese,\n"
                   "it will auto restore keystroke into original"));
    props.push_back(prop);

    // modern style
    prop.set_key(m_ukopt.modernStyle?
                 "/Unikey/Options/ModernStyle/Disable":"/Unikey/Options/ModernStyle/Enable");
    prop.set_label(_("Use oà, uý (instead of òa, úy)"));
    prop.set_icon(m_ukopt.modernStyle?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip("");
    props.push_back(prop);

    // freeMarking
    prop.set_key(m_ukopt.freeMarking?
                 "/Unikey/Options/FreeMarking/Disable":"/Unikey/Options/FreeMarking/Enable");
    prop.set_label(_("Allow type with more freedom"));
    prop.set_icon(m_ukopt.freeMarking?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip("");
    props.push_back(prop);

    // macro
    prop.set_key(m_ukopt.macroEnabled?
                 "/Unikey/Options/EnabledMacro/Disable":"/Unikey/Options/EnabledMacro/Enable");
    prop.set_label(_("Enable Macro"));
    prop.set_icon(m_ukopt.macroEnabled?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip("");
    props.push_back(prop);

    // process w at begin
    prop.set_key(m_process_w_AtBeginWord?
                 "/Unikey/Options/ProcessWAtBegin/Disable":"/Unikey/Options/ProcessWAtBegin/Enable");
    prop.set_label(_("Process W at word begin"));
    prop.set_icon(m_process_w_AtBeginWord?SCIM_ICONDIR SCIM_UNIKEY_ICON_CHECK:"");
    prop.set_tip(_("If enable, type W at begin\n"
                   "of word will change to Ư."));
    props.push_back(prop);

    // config gui
    prop.set_key("/Unikey/Options/RunSetup");
    prop.set_label(_("Launch Unikey Setup"));
    prop.set_icon(SCIM_ICONDIR SCIM_UNIKEY_ICON_MAIN);
    prop.set_tip("");
    props.push_back(prop);

    return props;
}

void UnikeyInstance::trigger_property(const String &property)
{
    bool change = false;
    uint i;

// input method
    if (!property.compare(0, strlen("/Unikey/InputMethod/"), "/Unikey/InputMethod/"))
    {
        for (i=0; i<NUM_INPUTMETHOD; i++)
            if (!property.compare(strlen("/Unikey/InputMethod/"),
                                  property.length() - strlen("/Unikey/InputMethod/"),
                                  Unikey_IMNames[i]))
            {
                m_im = i;
                __config->write(SCIM_IMENGINE_UNIKEY_INPUTMETHOD, m_im);
                change = true;
                break;
            }
    }

// output charset
    else if (!property.compare(0, strlen("/Unikey/OutputCharset/"), "/Unikey/OutputCharset/"))
    {
        for (i=0; i<NUM_OUTPUTCHARSET; i++)
            if (!property.compare(strlen("/Unikey/OutputCharset/"),
                                  property.length() - strlen("/Unikey/OutputCharset/"),
                                  Unikey_OCNames[i]))
            {
                m_oc = i;
                __config->write(SCIM_IMENGINE_UNIKEY_OUTPUTCHARSET, m_oc);
                change = true;
                break;
            }
    }

// spellcheck
    else if (property == "/Unikey/Options/SpellCheck/Enable")
    {
        m_ukopt.spellCheckEnabled = true;
        __config->write(SCIM_IMENGINE_UNIKEY_SPELLCHECKENABLED, true);
        change = true;
    }
    else if (property == "/Unikey/Options/SpellCheck/Disable")
    {
        m_ukopt.spellCheckEnabled = false;
        __config->write(SCIM_IMENGINE_UNIKEY_SPELLCHECKENABLED, false);
        change = true;
    }

// auto restore keystroke
    else if (property == "/Unikey/Options/AutoRestoreKeys/Enable")
    {
        m_ukopt.autoNonVnRestore = true;
        __config->write(SCIM_IMENGINE_UNIKEY_AUTONONVNRESTORE, true);
        change = true;
    }
    else if (property == "/Unikey/Options/AutoRestoreKeys/Disable")
    {
        m_ukopt.autoNonVnRestore = false;
        __config->write(SCIM_IMENGINE_UNIKEY_AUTONONVNRESTORE, false);
        change = true;
    }

// modern style
    else if (property == "/Unikey/Options/ModernStyle/Enable")
    {
        m_ukopt.modernStyle = true;
        __config->write(SCIM_IMENGINE_UNIKEY_MODERNSTYLE, true);
        change = true;
    }
    else if (property == "/Unikey/Options/ModernStyle/Disable")
    {
        m_ukopt.modernStyle = false;
        __config->write(SCIM_IMENGINE_UNIKEY_MODERNSTYLE, false);
        change = true;
    }

// free Marking
    else if (property == "/Unikey/Options/FreeMarking/Enable")
    {
        m_ukopt.freeMarking = true;
        __config->write(SCIM_IMENGINE_UNIKEY_FREEMARKING, true);
        change = true;
    }
    else if (property == "/Unikey/Options/FreeMarking/Disable")
    {
        m_ukopt.freeMarking = false;
        __config->write(SCIM_IMENGINE_UNIKEY_FREEMARKING, false);
        change = true;
    }
// macro 
    else if (property == "/Unikey/Options/EnabledMacro/Enable")
    {
        m_ukopt.macroEnabled = true;
        UnikeyLoadMacroTable(getMacroFile());
        __config->write(SCIM_IMENGINE_UNIKEY_MACROENABLED, true);
        change = true;
    }
    else if (property == "/Unikey/Options/EnabledMacro/Disable")
    {
        m_ukopt.macroEnabled = false;
        __config->write(SCIM_IMENGINE_UNIKEY_MACROENABLED, false);
        change = true;
    }

// process w at begin
    else if (property == "/Unikey/Options/ProcessWAtBegin/Enable")
    {
        m_process_w_AtBeginWord = true;
        __config->write(SCIM_IMENGINE_UNIKEY_PROCESSWATWORDBEGIN, true);
        change = true;
    }
    else if (property == "/Unikey/Options/ProcessWAtBegin/Disable")
    {
        m_process_w_AtBeginWord = false;
        __config->write(SCIM_IMENGINE_UNIKEY_PROCESSWATWORDBEGIN, false);
        change = true;
    }

// run setup
    else if (property == "/Unikey/Options/RunSetup")
    {
        system(LIBEXECDIR "/scim-setup-unikey &");
    }

    if (change)
    {
        __config->flush();
        focus_out();
        focus_in();
    }
}

/*********************************************************
**************** Unikey Instance Preedit *****************
*********************************************************/

UnikeyInstancePreedit::UnikeyInstancePreedit(UnikeyFactory *factory, const String &encoding, int id)
    :UnikeyInstance(factory, encoding, id),
     m_auto_commit(false)
{
    reset();
}

UnikeyInstancePreedit::~UnikeyInstancePreedit()
{
}

void UnikeyInstancePreedit::focus_in()
{
    UnikeyInstance::focus_in();
    register_properties(CreatePropertyList());
}

void UnikeyInstancePreedit::focus_out()
{
    reset();
}

void UnikeyInstancePreedit::reset()
{
    UnikeyInstance::reset();

    if (m_preeditstring.length())
    {
        commit_string(m_preeditstring);
        hide_preedit_string();
        m_preeditstring.clear();
    }
    m_auto_commit = false;
}

void UnikeyInstancePreedit::unikey_update_preedit_string(const WideString s, const bool visible)
{
    AttributeList attlist;
    Attribute att;

    // underline preedit string
    att = Attribute(0, s.length(), SCIM_ATTR_DECORATE, SCIM_ATTR_DECORATE_UNDERLINE);
    attlist.push_back(att);

    if (m_ukopt.spellCheckEnabled==1 && UnikeyLastWordIsNonVn())
    {
        // red preedit string
        att = Attribute(0, s.length(), SCIM_ATTR_FOREGROUND, 0xff0000);
        attlist.push_back(att);
    }

    update_preedit_string(s, attlist);
    update_preedit_caret(s.length());

    if (visible == true)
    {
        show_preedit_string();
    }
    else
    {
        hide_preedit_string();
    }
}

bool UnikeyInstancePreedit::process_key_event(const KeyEvent& key)
{
    bool tmp;

    tmp = unikey_process_key_event(key);

    if ((key.code >= SCIM_KEY_space && key.code <= SCIM_KEY_asciitilde)
        || (key.code >= SCIM_KEY_KP_Multiply && key.code <= SCIM_KEY_KP_9))
    {
        m_lastkey_with_shift = key.is_shift_down();
    }
    else
    {
        m_lastkey_with_shift = false;
    }

    return tmp;
}

bool UnikeyInstancePreedit::unikey_process_key_event(const KeyEvent& key)
{
    static uint i;

    if (key.code == SCIM_KEY_Tab
        || key.mask & SCIM_KEY_ControlMask
        || key.mask & SCIM_KEY_AltMask)
    {
        if (m_preeditstring.length())
        {
            commit_string(m_preeditstring);
            hide_preedit_string();
            m_preeditstring.clear();
        }
        reset();
        return false;
    }

    if (key.is_key_release())
        return true;

    if (key.code == SCIM_KEY_Tab
             || key.code == SCIM_KEY_Return
             || key.code == SCIM_KEY_Delete
             || key.code == SCIM_KEY_KP_Enter
             || (key.code >= SCIM_KEY_Home && key.code <= SCIM_KEY_Insert)
             || (key.code >= SCIM_KEY_KP_Home && key.code <= SCIM_KEY_KP_Delete))
    {
        if (m_preeditstring.length())
        {
            commit_string(m_preeditstring);
            hide_preedit_string();
            m_preeditstring.clear();
        }

        reset();
        return false;
    }

    else if (key.code >= SCIM_KEY_Shift_L && key.code <= SCIM_KEY_Hyper_R)
        return false;

    else if (key.code == SCIM_KEY_BackSpace)
    {
        UnikeyBackspacePress();     // process Backspace

        if (UnikeyBackspaces==0 || m_preeditstring.empty())    // if Unikey tell no Backspace
        {
            reset();
            return false;  // Return Backspace to client
        }
        else
        {
            static int len;

            len = m_preeditstring.length();
            if (len <= UnikeyBackspaces)
            {
                m_preeditstring.clear();
                hide_preedit_string();
                m_auto_commit = true;
            }
            else
            {
                m_preeditstring.erase(len - UnikeyBackspaces, UnikeyBackspaces);
                unikey_update_preedit_string(m_preeditstring, true);
            }

            // append key that need change tone pos after press backspace
            if (UnikeyBufChars)
            {
                if (Unikey_OC[m_oc] == CONV_CHARSET_XUTF8)
                    m_preeditstring.append(utf8_mbstowcs((const char*)UnikeyBuf, UnikeyBufChars));
                else
                {
                    static unsigned char buf[1024];
                    int bufSize=sizeof(buf)/sizeof(buf[0]);

                    latinToUtf(buf, UnikeyBuf, UnikeyBufChars, &bufSize);
                    m_preeditstring.append(utf8_mbstowcs((const char*)buf, sizeof(buf)/sizeof(buf[0])-bufSize));
                }

                m_auto_commit = false;
                unikey_update_preedit_string(m_preeditstring, true);
            }
        }

        return true;
    }

    else if (key.code >= SCIM_KEY_space && key.code <= SCIM_KEY_asciitilde)
    {
        UnikeySetCapsState(key.mask & SCIM_KEY_ShiftMask, key.mask & SCIM_KEY_CapsLockMask);

        // auto commit char: commit char that never change later in preedit string
        // if macro enabled, then not auto commit. Because macro may change any word
        if (m_ukopt.macroEnabled==0 && (UnikeyAtWordBeginning() || m_auto_commit))
        {
            for (i = 0; i < sizeof(WordAutoCommit); i++)
                if (key.code == WordAutoCommit[i])
                {
                    UnikeyPutChar(key.code);
                    m_auto_commit = true;
                    forward_key_event(key); // forward keyevent instead of return false
                    return true;
                }
        } // end auto commit char

        if ((Unikey_IM[m_im] == UkTelex || Unikey_IM[m_im] == UkSimpleTelex2)
                 && m_process_w_AtBeginWord == false
                 && UnikeyAtWordBeginning()
                 && (key.code == SCIM_KEY_w || key.code == SCIM_KEY_W))
        {
            UnikeyPutChar(key.code);
            if (m_ukopt.macroEnabled==0)
            {
                forward_key_event(key);
            }
            else
            {
                m_preeditstring.push_back(key.code);
                unikey_update_preedit_string(m_preeditstring, true);
            }

            m_auto_commit = true;
            
            return true;
        }

        m_auto_commit = false;

        if (m_lastkey_with_shift == false
            && key.mask & SCIM_KEY_ShiftMask
            && key.code == SCIM_KEY_space
            && !UnikeyAtWordBeginning())
        {
            UnikeyRestoreKeyStrokes();
        }

        else
        {
            UnikeyFilter(key.code);
        }

        if (UnikeyBackspaces > 0)
        {
            static int len;

            len = m_preeditstring.length();

            if (len <= UnikeyBackspaces)
                m_preeditstring.clear();
            else
                m_preeditstring.erase(len - UnikeyBackspaces, UnikeyBackspaces);
        }

        if (UnikeyBufChars > 0)
        {
            if (Unikey_OC[m_oc] == CONV_CHARSET_XUTF8)
                m_preeditstring.append(utf8_mbstowcs((const char*)UnikeyBuf, UnikeyBufChars));
            else
            {
                static unsigned char buf[1024];
                int bufSize=sizeof(buf)/sizeof(buf[0]);

                latinToUtf(buf, UnikeyBuf, UnikeyBufChars, &bufSize);
                m_preeditstring.append(utf8_mbstowcs((const char*)buf, sizeof(buf)/sizeof(buf[0])-bufSize));
            }
        }
        else
        {    
            m_preeditstring.push_back(key.get_unicode_code());
        }

        if (m_preeditstring.length())
        {
            for (i=0; i < sizeof(WordBreakSyms); i++)
            {
                if (WordBreakSyms[i] == m_preeditstring[m_preeditstring.length()-1] && key.code == WordBreakSyms[i])
                {
                    commit_string(m_preeditstring);
                    hide_preedit_string();
                    m_preeditstring.clear();
                    reset();
                    return true;
                }
            }
        }

        unikey_update_preedit_string(m_preeditstring, true);
        return true;
    }

    // else (key non process)
    reset();
    return false;
}

PropertyList UnikeyInstancePreedit::CreatePropertyList()
{
    return UnikeyInstance::CreatePropertyList();
}

void UnikeyInstancePreedit::trigger_property(const String &property)
{
    UnikeyInstance::trigger_property(property);
}


/*********************************************************
**************** Unikey Instance Classic *****************
*********************************************************/

UnikeyInstanceClassic::UnikeyInstanceClassic(UnikeyFactory *factory, const String &encoding, int id)
    :UnikeyInstance(factory, encoding, id)
{
    reset();
}

UnikeyInstanceClassic::~UnikeyInstanceClassic()
{
}

void UnikeyInstanceClassic::focus_in()
{
    UnikeyInstance::focus_in();
    register_properties(CreatePropertyList());
}

void UnikeyInstanceClassic::focus_out()
{
    reset();
}

void UnikeyInstanceClassic::reset()
{
    UnikeyInstance::reset();
}

void UnikeyInstanceClassic::unikey_send_backspace(int nBackspace)
{
    static WideString ws;
    static int n;

    //  if surrounding text was provided, use it instead of send backspace
    if (get_surrounding_text(ws, n, nBackspace, 0))
    {
        // for type in Auto Complete in OpenOffice
        // Hope this not rise bugs in others application
        // not use SCIM_KEY_NullKey, because GTK application crash when GTK_IM_MODULE=scim

        forward_key_event(SCIM_KEY_VoidSymbol);

        delete_surrounding_text(-ws.length(), ws.length());
    }
    else
    {
        for (int i=0; i < nBackspace; i++)
            forward_key_event(SCIM_KEY_BackSpace);
    }
}

void UnikeyInstanceClassic::unikey_commit_key_event(const KeyEvent& key)
{
    static WideString s;

    s.clear();
    s.push_back(key.code);
    commit_string(s);
}

bool UnikeyInstanceClassic::process_key_event(const KeyEvent& key)
{
    bool tmp;

    tmp = unikey_process_key_event(key);

    if ((key.code >= SCIM_KEY_space && key.code <= SCIM_KEY_asciitilde)
        || (key.code >= SCIM_KEY_KP_Multiply && key.code <= SCIM_KEY_KP_9))
    {
        m_lastkey_with_shift = key.is_shift_down();
    }
    else
    {
        m_lastkey_with_shift = false;
    }

    return tmp;
}

bool UnikeyInstanceClassic::unikey_process_key_event(const KeyEvent& key)
{
    if (key.is_key_release())
    {
        return true;
    }

    if (key.is_control_down() || key.mask & SCIM_KEY_AltMask)
    {
        reset();
        return false;
    }

    if (key.code >= SCIM_KEY_Shift_L && key.code <= SCIM_KEY_Hyper_R)
    {
        return false;
    }

    if (key.code == SCIM_KEY_BackSpace)
    {
        UnikeyBackspacePress();     // xu ly phim backspace
        if (UnikeyBackspaces==0)    // neu ukengine bao khong can xoa ky tu nao,
            return false;  // thi tra lai backspace cho chuong trinh khach
        else
        {
            unikey_send_backspace(UnikeyBackspaces);

            // append key that need change tone pos after press backspace
            if (UnikeyBufChars)
            {
                if (Unikey_OC[m_oc] == CONV_CHARSET_XUTF8)
                    commit_string(utf8_mbstowcs((const char*)UnikeyBuf, UnikeyBufChars));  // send the solved string to client
                else
                {
                    static unsigned char buf[1024];
                    int bufSize=sizeof(buf)/sizeof(buf[0]);

                    latinToUtf(buf, UnikeyBuf, UnikeyBufChars, &bufSize);
                    commit_string(utf8_mbstowcs((const char*)buf, sizeof(buf)/sizeof(buf[0]) - bufSize));
                }
            }

            return true;
        }
    }

    if (key.code >= SCIM_KEY_space && key.code <= SCIM_KEY_asciitilde)
    {
        UnikeySetCapsState(key.mask & SCIM_KEY_ShiftMask,
                           key.mask & SCIM_KEY_CapsLockMask);

        // shift + space to restore keystroke
        if (m_lastkey_with_shift == false
            && key.mask & SCIM_KEY_ShiftMask
            && key.code == SCIM_KEY_space
            && !UnikeyAtWordBeginning())
        {
            UnikeyRestoreKeyStrokes();
            if (UnikeyBackspaces == 0)
            {
                UnikeyPutChar(key.code);
            }
        }

        else if ((Unikey_IM[m_im] == UkTelex || Unikey_IM[m_im] == UkSimpleTelex2)
                 && m_process_w_AtBeginWord == false
                 && UnikeyAtWordBeginning()
                 && (key.code == SCIM_KEY_w || key.code == SCIM_KEY_W))
        {
            UnikeyPutChar(key.code);
        }

        else
        {
            UnikeyFilter(key.code);
        }

        if (UnikeyBackspaces)
        {
            unikey_send_backspace(UnikeyBackspaces);
        }

        if (UnikeyBufChars)
        {
            if (Unikey_OC[m_oc] == CONV_CHARSET_XUTF8)
            {
                commit_string(utf8_mbstowcs((const char*)UnikeyBuf, UnikeyBufChars));  // send the solved string to client
            }
            else
            {
                static unsigned char buf[1024];
                int bufSize=sizeof(buf)/sizeof(buf[0]);

                latinToUtf(buf, UnikeyBuf, UnikeyBufChars, &bufSize);
                commit_string(utf8_mbstowcs((const char*)buf, sizeof(buf)/sizeof(buf[0]) - bufSize));
            }
        }
        else
        {
            unikey_commit_key_event(key);
            return true;
        }

        return true;
    }

    // else
    reset();
    return false;
}

PropertyList UnikeyInstanceClassic::CreatePropertyList()
{
    return UnikeyInstance::CreatePropertyList();
}

void UnikeyInstanceClassic::trigger_property(const String &property)
{
    UnikeyInstance::trigger_property(property);
}