]> git.saurik.com Git - wxWidgets.git/blobdiff - src/common/intl.cpp
Also allow key events for Shift-Tab when wxWANTS_CHARS style is used
[wxWidgets.git] / src / common / intl.cpp
index 8dcb64784cb1c9d31f0465388d4c3077d0b04bd0..820a7d6bad0f1b85742c3840f73562f765703057 100644 (file)
@@ -2,7 +2,8 @@
 // Name:        src/common/intl.cpp
 // Purpose:     Internationalization and localisation for wxWindows
 // Author:      Vadim Zeitlin
-// Modified by:
+// Modified by: Michael N. Filippov <michael@idisys.iae.nsk.su>
+//              (2003/09/30 - PluralForms support)
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
     #pragma implementation "intl.h"
 #endif
 
+#if defined(__BORLAND__) && !defined(__WXDEBUG__)
+    // There's a bug in Borland's compiler that breaks wxLocale with -O2,
+    // so make sure that flag is not used for this file:
+    #pragma option -O1
+#endif
+
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -64,6 +71,7 @@
 #include "wx/fontmap.h"
 #include "wx/encconv.h"
 #include "wx/hashmap.h"
+#include "wx/ptr_scpd.h"
 
 #if defined(__WXMAC__)
   #include  "wx/mac/private.h"  // includes mac headers
@@ -145,6 +153,713 @@ static inline wxString ExtractNotLang(const wxString& langFull)
 #endif // __UNIX__
 
 
+// ----------------------------------------------------------------------------
+// Plural forms parser
+// ----------------------------------------------------------------------------
+
+/* 
+                                Simplified Grammar
+
+Expression:
+    LogicalOrExpression '?' Expression ':' Expression
+    LogicalOrExpression
+
+LogicalOrExpression:
+    LogicalAndExpression "||" LogicalOrExpression   // to (a || b) || c
+    LogicalAndExpression
+
+LogicalAndExpression:
+    EqualityExpression "&&" LogicalAndExpression    // to (a && b) && c
+    EqualityExpression
+
+EqualityExpression:
+    RelationalExpression "==" RelationalExperession
+    RelationalExpression "!=" RelationalExperession
+    RelationalExpression
+
+RelationalExpression:
+    MultiplicativeExpression '>' MultiplicativeExpression
+    MultiplicativeExpression '<' MultiplicativeExpression
+    MultiplicativeExpression ">=" MultiplicativeExpression
+    MultiplicativeExpression "<=" MultiplicativeExpression
+    MultiplicativeExpression
+    
+MultiplicativeExpression:
+    PmExpression '%' PmExpression
+    PmExpression
+
+PmExpression:
+    N
+    Number
+    '(' Expression ')'
+*/
+
+class wxPluralFormsToken
+{
+public:
+    enum Type
+    {
+        T_ERROR, T_EOF, T_NUMBER, T_N, T_PLURAL, T_NPLURALS, T_EQUAL, T_ASSIGN,
+        T_GREATER, T_GREATER_OR_EQUAL, T_LESS, T_LESS_OR_EQUAL,
+        T_REMINDER, T_NOT_EQUAL,
+        T_LOGICAL_AND, T_LOGICAL_OR, T_QUESTION, T_COLON, T_SEMICOLON,
+        T_LEFT_BRACKET, T_RIGHT_BRACKET
+    };
+    Type type() const { return m_type; }
+    void setType(Type type) { m_type = type; }
+    // for T_NUMBER only
+    typedef int Number;
+    Number number() const { return m_number; }
+    void setNumber(Number num) { m_number = num; }
+private:
+    Type m_type;
+    Number m_number;
+};
+
+
+class wxPluralFormsScanner
+{
+public:
+    wxPluralFormsScanner(const char* s);
+    const wxPluralFormsToken& token() const { return m_token; }
+    bool nextToken();  // returns false if error
+private:
+    const char* m_s;
+    wxPluralFormsToken m_token;
+};
+
+wxPluralFormsScanner::wxPluralFormsScanner(const char* s) : m_s(s)
+{
+    nextToken();
+}
+
+bool wxPluralFormsScanner::nextToken()
+{
+    wxPluralFormsToken::Type type = wxPluralFormsToken::T_ERROR;
+    while (isspace(*m_s))
+    {
+        ++m_s;
+    }
+    if (*m_s == 0)
+    {
+        type = wxPluralFormsToken::T_EOF;
+    }
+    else if (isdigit(*m_s))
+    {
+        wxPluralFormsToken::Number number = *m_s++ - '0';
+        while (isdigit(*m_s))
+        {
+            number = number * 10 + (*m_s++ - '0');
+        }
+        m_token.setNumber(number);
+        type = wxPluralFormsToken::T_NUMBER;
+    }
+    else if (isalpha(*m_s))
+    {
+        const char* begin = m_s++;
+        while (isalnum(*m_s))
+        {
+            ++m_s;
+        }
+        size_t size = m_s - begin;
+        if (size == 1 && memcmp(begin, "n", size) == 0)
+        {
+            type = wxPluralFormsToken::T_N;
+        }
+        else if (size == 6 && memcmp(begin, "plural", size) == 0)
+        {
+            type = wxPluralFormsToken::T_PLURAL;
+        }
+        else if (size == 8 && memcmp(begin, "nplurals", size) == 0)
+        {
+            type = wxPluralFormsToken::T_NPLURALS;
+        }
+    }
+    else if (*m_s == '=')
+    {
+        ++m_s;
+        if (*m_s == '=')
+        {
+            ++m_s;
+            type = wxPluralFormsToken::T_EQUAL;
+        }
+        else
+        {
+            type = wxPluralFormsToken::T_ASSIGN;
+        }
+    }
+    else if (*m_s == '>')
+    {
+        ++m_s;
+        if (*m_s == '=')
+        {
+            ++m_s;
+            type = wxPluralFormsToken::T_GREATER_OR_EQUAL;
+        }
+        else
+        {
+            type = wxPluralFormsToken::T_GREATER;
+        }
+    }
+    else if (*m_s == '<')
+    {
+        ++m_s;
+        if (*m_s == '=')
+        {
+            ++m_s;
+            type = wxPluralFormsToken::T_LESS_OR_EQUAL;
+        }
+        else
+        {
+            type = wxPluralFormsToken::T_LESS;
+        }
+    }
+    else if (*m_s == '%')
+    {
+        ++m_s;
+        type = wxPluralFormsToken::T_REMINDER;
+    }
+    else if (*m_s == '!' && m_s[1] == '=')
+    {
+        m_s += 2;
+        type = wxPluralFormsToken::T_NOT_EQUAL;
+    }
+    else if (*m_s == '&' && m_s[1] == '&')
+    {
+        m_s += 2;
+        type = wxPluralFormsToken::T_LOGICAL_AND;
+    }
+    else if (*m_s == '|' && m_s[1] == '|')
+    {
+        m_s += 2;
+        type = wxPluralFormsToken::T_LOGICAL_OR;
+    }
+    else if (*m_s == '?')
+    {
+        ++m_s;
+        type = wxPluralFormsToken::T_QUESTION;
+    }
+    else if (*m_s == ':')
+    {
+        ++m_s;
+        type = wxPluralFormsToken::T_COLON;
+    } else if (*m_s == ';') {
+        ++m_s;
+        type = wxPluralFormsToken::T_SEMICOLON;
+    }
+    else if (*m_s == '(')
+    {
+        ++m_s;
+        type = wxPluralFormsToken::T_LEFT_BRACKET;
+    }
+    else if (*m_s == ')')
+    {
+        ++m_s;
+        type = wxPluralFormsToken::T_RIGHT_BRACKET;
+    }
+    m_token.setType(type);
+    return type != wxPluralFormsToken::T_ERROR;
+}
+
+class wxPluralFormsNode;
+
+// NB: Can't use wxDEFINE_SCOPED_PTR_TYPE because wxPluralFormsNode is not
+//     fully defined yet:
+class wxPluralFormsNodePtr
+{
+public:
+    wxPluralFormsNodePtr(wxPluralFormsNode *p = NULL) : m_p(p) {}
+    ~wxPluralFormsNodePtr();
+    wxPluralFormsNode& operator*() const { return *m_p; }
+    wxPluralFormsNode* operator->() const { return m_p; }
+    wxPluralFormsNode* get() const { return m_p; }
+    wxPluralFormsNode* release();
+    void reset(wxPluralFormsNode *p);
+
+private:
+    wxPluralFormsNode *m_p;
+};
+
+class wxPluralFormsNode
+{
+public:
+    wxPluralFormsNode(const wxPluralFormsToken& token) : m_token(token) {}
+    const wxPluralFormsToken& token() const { return m_token; }
+    const wxPluralFormsNode* node(size_t i) const
+        { return m_nodes[i].get(); }
+    void setNode(size_t i, wxPluralFormsNode* n);
+    wxPluralFormsNode* releaseNode(size_t i);
+    wxPluralFormsToken::Number evaluate(wxPluralFormsToken::Number n) const;
+
+private:
+    wxPluralFormsToken m_token;
+    wxPluralFormsNodePtr m_nodes[3];
+};
+    
+wxPluralFormsNodePtr::~wxPluralFormsNodePtr()
+{
+    delete m_p;
+}
+wxPluralFormsNode* wxPluralFormsNodePtr::release()
+{
+    wxPluralFormsNode *p = m_p;
+    m_p = NULL;
+    return p;
+}
+void wxPluralFormsNodePtr::reset(wxPluralFormsNode *p)
+{
+    if (p != m_p)
+    {
+        delete m_p;
+        m_p = p;
+    }
+}
+
+
+void wxPluralFormsNode::setNode(size_t i, wxPluralFormsNode* n)
+{
+    m_nodes[i].reset(n);
+}
+
+wxPluralFormsNode*  wxPluralFormsNode::releaseNode(size_t i)
+{
+    return m_nodes[i].release();
+}
+
+wxPluralFormsToken::Number
+wxPluralFormsNode::evaluate(wxPluralFormsToken::Number n) const
+{
+    switch (token().type())
+    {
+        // leaf
+        case wxPluralFormsToken::T_NUMBER:
+            return token().number();
+        case wxPluralFormsToken::T_N:
+            return n;
+        // 2 args
+        case wxPluralFormsToken::T_EQUAL:
+            return node(0)->evaluate(n) == node(1)->evaluate(n);
+        case wxPluralFormsToken::T_NOT_EQUAL:
+            return node(0)->evaluate(n) != node(1)->evaluate(n);
+        case wxPluralFormsToken::T_GREATER:
+            return node(0)->evaluate(n) > node(1)->evaluate(n);
+        case wxPluralFormsToken::T_GREATER_OR_EQUAL:
+            return node(0)->evaluate(n) >= node(1)->evaluate(n);
+        case wxPluralFormsToken::T_LESS:
+            return node(0)->evaluate(n) < node(1)->evaluate(n);
+        case wxPluralFormsToken::T_LESS_OR_EQUAL:
+            return node(0)->evaluate(n) <= node(1)->evaluate(n);
+        case wxPluralFormsToken::T_REMINDER:
+            {
+                wxPluralFormsToken::Number number = node(1)->evaluate(n);
+                if (number != 0)
+                {
+                    return node(0)->evaluate(n) % number;
+                }
+                else
+                {
+                    return 0;
+                }
+            }
+        case wxPluralFormsToken::T_LOGICAL_AND:
+            return node(0)->evaluate(n) && node(1)->evaluate(n);
+        case wxPluralFormsToken::T_LOGICAL_OR:
+            return node(0)->evaluate(n) || node(1)->evaluate(n);
+        // 3 args
+        case wxPluralFormsToken::T_QUESTION:
+            return node(0)->evaluate(n)
+                ? node(1)->evaluate(n)
+                : node(2)->evaluate(n);
+        default:
+            return 0;
+    }
+}
+
+
+class wxPluralFormsCalculator
+{
+public:
+    wxPluralFormsCalculator() : m_nplurals(0), m_plural(0) {}
+    
+    // input: number, returns msgstr index
+    int evaluate(int n) const;
+
+    // input: text after "Plural-Forms:" (e.g. "nplurals=2; plural=(n != 1);"),
+    // if s == 0, creates default handler
+    // returns 0 if error
+    static wxPluralFormsCalculator* make(const char* s = 0);
+
+    ~wxPluralFormsCalculator() {}
+
+    void  init(wxPluralFormsToken::Number nplurals, wxPluralFormsNode* plural);
+    wxString getString() const;
+    
+private:
+    wxPluralFormsToken::Number m_nplurals;
+    wxPluralFormsNodePtr m_plural;
+};
+
+wxDEFINE_SCOPED_PTR_TYPE(wxPluralFormsCalculator);
+
+void wxPluralFormsCalculator::init(wxPluralFormsToken::Number nplurals,
+                                   wxPluralFormsNode* plural)
+{
+    m_nplurals = nplurals;
+    m_plural.reset(plural);
+}
+
+int wxPluralFormsCalculator::evaluate(int n) const
+{
+    if (m_plural.get() == 0)
+    {
+        return 0;
+    }
+    wxPluralFormsToken::Number number = m_plural->evaluate(n);
+    if (number < 0 || number > m_nplurals)
+    {
+        return 0;
+    }
+    return number;
+}
+
+
+class wxPluralFormsParser
+{
+public:
+    wxPluralFormsParser(wxPluralFormsScanner& scanner) : m_scanner(scanner) {}
+    bool parse(wxPluralFormsCalculator& rCalculator);
+
+private:
+    wxPluralFormsNode* parsePlural();
+    // stops at T_SEMICOLON, returns 0 if error
+    wxPluralFormsScanner& m_scanner;
+    const wxPluralFormsToken& token() const;
+    bool nextToken();
+    
+    wxPluralFormsNode* expression();
+    wxPluralFormsNode* logicalOrExpression();
+    wxPluralFormsNode* logicalAndExpression();
+    wxPluralFormsNode* equalityExpression();
+    wxPluralFormsNode* multiplicativeExpression();
+    wxPluralFormsNode* relationalExpression();
+    wxPluralFormsNode* pmExpression();
+};
+
+bool wxPluralFormsParser::parse(wxPluralFormsCalculator& rCalculator)
+{
+    if (token().type() != wxPluralFormsToken::T_NPLURALS)
+        return false;
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_ASSIGN)
+        return false;
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_NUMBER)
+        return false;
+    wxPluralFormsToken::Number nplurals = token().number();
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+        return false;
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_PLURAL)
+        return false;
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_ASSIGN)
+        return false;
+    if (!nextToken())
+        return false;
+    wxPluralFormsNode* plural = parsePlural();
+    if (plural == 0)
+        return false;
+    if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+        return false;
+    if (!nextToken())
+        return false;
+    if (token().type() != wxPluralFormsToken::T_EOF)
+        return false;
+    rCalculator.init(nplurals, plural);
+    return true;
+}
+
+wxPluralFormsNode* wxPluralFormsParser::parsePlural()
+{
+    wxPluralFormsNode* p = expression();
+    if (p == NULL)
+    {
+        return NULL;
+    }
+    wxPluralFormsNodePtr n(p);
+    if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+    {
+        return NULL;
+    }
+    return n.release();
+}
+
+const wxPluralFormsToken& wxPluralFormsParser::token() const
+{
+    return m_scanner.token();
+}
+
+bool wxPluralFormsParser::nextToken()
+{
+    if (!m_scanner.nextToken())
+        return false;
+    return true;
+}
+
+wxPluralFormsNode* wxPluralFormsParser::expression()
+{
+    wxPluralFormsNode* p = logicalOrExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr n(p);
+    if (token().type() == wxPluralFormsToken::T_QUESTION)
+    {
+        wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return 0;
+        }
+        p = expression();
+        if (p == 0)
+        {
+            return 0;
+        }
+        qn->setNode(1, p);
+        if (token().type() != wxPluralFormsToken::T_COLON)
+        {
+            return 0;
+        }
+        if (!nextToken())
+        {
+            return 0;
+        }
+        p = expression();
+        if (p == 0)
+        {
+            return 0;
+        }
+        qn->setNode(2, p);
+        qn->setNode(0, n.release());
+        return qn.release();
+    }
+    return n.release();
+}
+
+wxPluralFormsNode*wxPluralFormsParser::logicalOrExpression()
+{
+    wxPluralFormsNode* p = logicalAndExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr ln(p);
+    if (token().type() == wxPluralFormsToken::T_LOGICAL_OR)
+    {
+        wxPluralFormsNodePtr un(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return 0;
+        }
+        p = logicalOrExpression();
+        if (p == 0)
+        {
+            return 0;
+        }
+        wxPluralFormsNodePtr rn(p);    // right
+        if (rn->token().type() == wxPluralFormsToken::T_LOGICAL_OR)
+        {
+            // see logicalAndExpression comment
+            un->setNode(0, ln.release());
+            un->setNode(1, rn->releaseNode(0));
+            rn->setNode(0, un.release());
+            return rn.release();
+        }
+
+
+        un->setNode(0, ln.release());
+        un->setNode(1, rn.release());
+        return un.release();
+    }
+    return ln.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::logicalAndExpression()
+{
+    wxPluralFormsNode* p = equalityExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr ln(p);   // left
+    if (token().type() == wxPluralFormsToken::T_LOGICAL_AND)
+    {
+        wxPluralFormsNodePtr un(new wxPluralFormsNode(token()));  // up
+        if (!nextToken())
+        {
+            return NULL;
+        }
+        p = logicalAndExpression();
+        if (p == 0)
+        {
+            return NULL;
+        }
+        wxPluralFormsNodePtr rn(p);    // right
+        if (rn->token().type() == wxPluralFormsToken::T_LOGICAL_AND)
+        {
+// transform 1 && (2 && 3) -> (1 && 2) && 3
+//     u                  r
+// l       r     ->   u      3
+//       2   3      l   2
+            un->setNode(0, ln.release());
+            un->setNode(1, rn->releaseNode(0));
+            rn->setNode(0, un.release());
+            return rn.release();
+        }
+
+        un->setNode(0, ln.release());
+        un->setNode(1, rn.release());
+        return un.release();
+    }
+    return ln.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::equalityExpression()
+{
+    wxPluralFormsNode* p = relationalExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr n(p);
+    if (token().type() == wxPluralFormsToken::T_EQUAL
+        || token().type() == wxPluralFormsToken::T_NOT_EQUAL)
+    {
+        wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return NULL;
+        }
+        p = relationalExpression();
+        if (p == NULL)
+        {
+            return NULL;
+        }
+        qn->setNode(1, p);
+        qn->setNode(0, n.release());
+        return qn.release();
+    }
+    return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::relationalExpression()
+{
+    wxPluralFormsNode* p = multiplicativeExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr n(p);
+    if (token().type() == wxPluralFormsToken::T_GREATER
+            || token().type() == wxPluralFormsToken::T_LESS
+            || token().type() == wxPluralFormsToken::T_GREATER_OR_EQUAL
+            || token().type() == wxPluralFormsToken::T_LESS_OR_EQUAL)
+    {
+        wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return NULL;
+        }
+        p = multiplicativeExpression();
+        if (p == NULL)
+        {
+            return NULL;
+        }
+        qn->setNode(1, p);
+        qn->setNode(0, n.release());
+        return qn.release();
+    }
+    return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::multiplicativeExpression()
+{
+    wxPluralFormsNode* p = pmExpression();
+    if (p == NULL)
+        return NULL;
+    wxPluralFormsNodePtr n(p);
+    if (token().type() == wxPluralFormsToken::T_REMINDER)
+    {
+        wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return NULL;
+        }
+        p = pmExpression();
+        if (p == NULL)
+        {
+            return NULL;
+        }
+        qn->setNode(1, p);
+        qn->setNode(0, n.release());
+        return qn.release();
+    }
+    return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::pmExpression()
+{
+    wxPluralFormsNodePtr n;
+    if (token().type() == wxPluralFormsToken::T_N
+        || token().type() == wxPluralFormsToken::T_NUMBER)
+    {
+        n.reset(new wxPluralFormsNode(token()));
+        if (!nextToken())
+        {
+            return NULL;
+        }
+    }
+    else if (token().type() == wxPluralFormsToken::T_LEFT_BRACKET) {
+        if (!nextToken())
+        {
+            return NULL;
+        }
+        wxPluralFormsNode* p = expression();
+        if (p == NULL)
+        {
+            return NULL;
+        }
+        n.reset(p);
+        if (token().type() != wxPluralFormsToken::T_RIGHT_BRACKET)
+        {
+            return NULL;
+        }
+        if (!nextToken())
+        {
+            return NULL;
+        }
+    }
+    else
+    {
+        return NULL;
+    }
+    return n.release();
+}
+
+wxPluralFormsCalculator* wxPluralFormsCalculator::make(const char* s)
+{
+    wxPluralFormsCalculatorPtr calculator(new wxPluralFormsCalculator);
+    if (s != NULL)
+    {
+        wxPluralFormsScanner scanner(s);
+        wxPluralFormsParser p(scanner);
+        if (!p.parse(*calculator))
+        {
+            return NULL;
+        }
+    }
+    return calculator.release();
+}
+
+
+
 
 // ----------------------------------------------------------------------------
 // wxMsgCatalogFile corresponds to one disk-file message catalog.
@@ -162,7 +877,8 @@ public:
    ~wxMsgCatalogFile();
 
     // load the catalog from disk (szDirPrefix corresponds to language)
-    bool Load(const wxChar *szDirPrefix, const wxChar *szName);
+    bool Load(const wxChar *szDirPrefix, const wxChar *szName,
+              wxPluralFormsCalculatorPtr& rPluralFormsCalculator);
 
     // fills the hash with string-translation pairs
     void FillHash(wxMessagesHash& hash, bool convertEncoding) const;
@@ -200,6 +916,8 @@ private:
     wxMsgTableEntry  *m_pOrigTable,   // pointer to original   strings
                      *m_pTransTable;  //            translated
 
+    wxString m_charset;
+                     
     // swap the 2 halves of 32 bit integer if needed
     size_t32 Swap(size_t32 ui) const
     {
@@ -215,12 +933,12 @@ private:
         // this check could fail for a corrupt message catalog
         size_t32 ofsString = Swap(ent->ofsString);
         if ( ofsString + Swap(ent->nLen) > m_nSize)
+        {
             return NULL;
+        }
 
         return (const char *)(m_pData + ofsString);
-    }
-
-    wxString GetCharset() const;
+    }    
 
     bool m_bSwapped;   // wrong endianness?
 
@@ -245,7 +963,7 @@ public:
     wxString GetName() const { return m_name; }
 
     // get the translated string: returns NULL if not found
-    const wxChar *GetString(const wxChar *sz) const;
+    const wxChar *GetString(const wxChar *sz, size_t n = size_t(-1)) const;
 
     // public variable pointing to the next element in a linked list (or NULL)
     wxMsgCatalog *m_pNext;
@@ -253,6 +971,7 @@ public:
 private:
     wxMessagesHash  m_messages; // all messages in the catalog
     wxString        m_name;     // name of the domain
+    wxPluralFormsCalculatorPtr  m_pluralFormsCalculator;
 };
 
 // ----------------------------------------------------------------------------
@@ -343,7 +1062,8 @@ static wxString GetFullSearchPath(const wxChar *lang)
 }
 
 // open disk file and read in it's contents
-bool wxMsgCatalogFile::Load(const wxChar *szDirPrefix, const wxChar *szName0)
+bool wxMsgCatalogFile::Load(const wxChar *szDirPrefix, const wxChar *szName0,
+                            wxPluralFormsCalculatorPtr& rPluralFormsCalculator)
 {
    /* We need to handle locales like  de_AT.iso-8859-1
       For this we first chop off the .CHARSET specifier and ignore it.
@@ -430,45 +1150,78 @@ bool wxMsgCatalogFile::Load(const wxChar *szDirPrefix, const wxChar *szName0)
   m_pTransTable = (wxMsgTableEntry *)(m_pData +
                    Swap(pHeader->ofsTransTable));
   m_nSize = nSize;
+    
+  // now parse catalog's header and try to extract catalog charset and
+  // plural forms formula from it:
+
+  const char* headerData = StringAtOfs(m_pOrigTable, 0);
+  if (headerData && headerData[0] == 0)
+  {
+      // Extract the charset:
+      wxString header = wxString::FromAscii(StringAtOfs(m_pTransTable, 0));
+      int begin = header.Find(wxT("Content-Type: text/plain; charset="));
+      if (begin != wxNOT_FOUND)
+      {
+          begin += 34; //strlen("Content-Type: text/plain; charset=")
+          size_t end = header.find('\n', begin);
+          if (end != size_t(-1))
+          {
+              m_charset.assign(header, begin, end - begin);
+              if (m_charset == wxT("CHARSET"))
+              {
+                  // "CHARSET" is not valid charset, but lazy translator
+                  m_charset.Clear();
+              }
+          }
+      }
+      // else: incorrectly filled Content-Type header
+      
+      // Extract plural forms:
+      begin = header.Find(wxT("Plural-Forms:"));
+      if (begin != wxNOT_FOUND)
+      {
+          begin += 13;
+          size_t end = header.find('\n', begin);
+          if (end != size_t(-1))
+          {
+              wxString pfs(header, begin, end - begin);
+              wxPluralFormsCalculator* pCalculator = wxPluralFormsCalculator
+                  ::make(pfs.ToAscii());
+              if (pCalculator != 0)
+              {
+                  rPluralFormsCalculator.reset(pCalculator);
+              }
+              else
+              {
+                   wxLogVerbose(_("Cannot parse Plural-Forms:'%s'"),
+                          pfs.c_str());
+              }
+          }
+      }
+      if (rPluralFormsCalculator.get() == NULL)
+      {
+          rPluralFormsCalculator.reset(wxPluralFormsCalculator::make());
+      }
+  }
 
   // everything is fine
-  return TRUE;
+  return true;
 }
 
 void wxMsgCatalogFile::FillHash(wxMessagesHash& hash, bool convertEncoding) const
 {
-    wxString charset = GetCharset();
-
 #if wxUSE_WCHAR_T
     wxCSConv *csConv = NULL;
-    if ( !!charset )
-        csConv = new wxCSConv(charset);
+    if ( !!m_charset )
+        csConv = new wxCSConv(m_charset);
 
     wxMBConv& inputConv = csConv ? *((wxMBConv*)csConv) : *wxConvCurrent;
-
-    for (size_t i = 0; i < m_numStrings; i++)
-    {
-        wxString key(StringAtOfs(m_pOrigTable, i), inputConv);
-
-    #if wxUSE_UNICODE
-        hash[key] = wxString(StringAtOfs(m_pTransTable, i), inputConv);
-    #else
-        if ( convertEncoding )
-            hash[key] =
-                wxString(inputConv.cMB2WC(StringAtOfs(m_pTransTable, i)),
-                         wxConvLocal);
-        else
-            hash[key] = StringAtOfs(m_pTransTable, i);
-    #endif
-    }
-
-    delete csConv;
-#else // !wxUSE_WCHAR_T
-    #if wxUSE_FONTMAP
+#elif wxUSE_FONTMAP
+    wxEncodingConverter converter;
     if ( convertEncoding )
     {
         wxFontEncoding targetEnc = wxFONTENCODING_SYSTEM;
-        wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset, FALSE);
+        wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(m_charset, FALSE);
         if ( enc == wxFONTENCODING_SYSTEM )
         {
             convertEncoding = FALSE; // unknown encoding
@@ -491,63 +1244,61 @@ void wxMsgCatalogFile::FillHash(wxMessagesHash& hash, bool convertEncoding) cons
 
         if ( convertEncoding )
         {
-            wxEncodingConverter converter;
             converter.Init(enc, targetEnc);
-
-            for (size_t i = 0; i < m_numStrings; i++)
-            {
-                wxString key(StringAtOfs(m_pOrigTable, i));
-                hash[key] =
-                    converter.Convert(wxString(StringAtOfs(m_pTransTable, i)));
-            }
-        }
-    }
-
-    if ( !convertEncoding )
-    #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
-    {
-        for (size_t i = 0; i < m_numStrings; i++)
-        {
-            wxString key(StringAtOfs(m_pOrigTable, i));
-            hash[key] = StringAtOfs(m_pTransTable, i);
         }
     }
 #endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
     (void)convertEncoding; // get rid of warnings about unused parameter
-}
-
-wxString wxMsgCatalogFile::GetCharset() const
-{
-    // first, find encoding header:
-    const char *hdr = StringAtOfs(m_pOrigTable, 0);
-    if ( hdr == NULL || hdr[0] != 0 )
-    {
-        // not supported by this catalog, does not have correct header
-        return wxEmptyString;
-    }
 
-    wxString header = wxString::FromAscii( StringAtOfs(m_pTransTable, 0));
-    wxString charset;
-    int pos = header.Find(wxT("Content-Type: text/plain; charset="));
-    if ( pos == wxNOT_FOUND )
+    for (size_t i = 0; i < m_numStrings; i++)
     {
-        // incorrectly filled Content-Type header
-        return wxEmptyString;
-    }
+        const char *data = StringAtOfs(m_pOrigTable, i);
+#if wxUSE_WCHAR_T
+        wxString msgid(data, inputConv);
+#else
+        wxString msgid(data);
+#endif
 
-    size_t n = pos + 34; /*strlen("Content-Type: text/plain; charset=")*/
-    while ( header[n] != wxT('\n') )
-        charset << header[n++];
+        data = StringAtOfs(m_pTransTable, i);
+        size_t length = Swap(m_pTransTable[i].nLen);
+        size_t offset = 0;
+        size_t index = 0;
+        while (offset < length)
+        {
+            wxString msgstr;
+#if wxUSE_WCHAR_T
+        #if wxUSE_UNICODE
+            msgstr = wxString(data + offset, inputConv);
+        #else
+            if ( convertEncoding )
+                msgstr = wxString(inputConv.cMB2WC(data + offset), wxConvLocal);
+            else
+                msgstr = wxString(data + offset);
+        #endif
+#else // !wxUSE_WCHAR_T
+        #if wxUSE_FONTMAP
+            if ( convertEncoding )
+                msgstr = wxString(converter.Convert(data + offset));
+            else
+        #endif
+                msgstr = wxString(data + offset);
+#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
 
-    if ( charset == wxT("CHARSET") )
-    {
-        // "CHARSET" is not valid charset, but lazy translator
-        return wxEmptyString;
+            if ( !msgstr.empty() )
+            {
+                hash[index == 0 ? msgid : msgid + wxChar(index)] = msgstr;
+            }
+            offset += strlen(data + offset) + 1;
+            ++index;
+        }
     }
 
-    return charset;
+#if wxUSE_WCHAR_T
+    delete csConv;
+#endif
 }
 
+
 // ----------------------------------------------------------------------------
 // wxMsgCatalog class
 // ----------------------------------------------------------------------------
@@ -559,7 +1310,7 @@ bool wxMsgCatalog::Load(const wxChar *szDirPrefix, const wxChar *szName,
 
     m_name = szName;
 
-    if ( file.Load(szDirPrefix, szName) )
+    if ( file.Load(szDirPrefix, szName, m_pluralFormsCalculator) )
     {
         file.FillHash(m_messages, bConvertEncoding);
         return TRUE;
@@ -568,9 +1319,23 @@ bool wxMsgCatalog::Load(const wxChar *szDirPrefix, const wxChar *szName,
     return FALSE;
 }
 
-const wxChar *wxMsgCatalog::GetString(const wxChar *sz) const
+const wxChar *wxMsgCatalog::GetString(const wxChar *sz, size_t n) const
 {
-    wxMessagesHash::const_iterator i = m_messages.find(sz);
+    int index = 0;
+    if (n != size_t(-1))
+    {
+        index = m_pluralFormsCalculator->evaluate(n);
+    }
+    wxMessagesHash::const_iterator i;
+    if (index != 0)
+    {
+        i = m_messages.find(wxString(sz) + wxChar(index));   // plural
+    }
+    else
+    {
+        i = m_messages.find(sz);
+    }
+
     if ( i != m_messages.end() )
     {
         return i->second.c_str();
@@ -610,6 +1375,7 @@ wxLocale::wxLocale()
   m_pszOldLocale = NULL;
   m_pMsgCat = NULL;
   m_language = wxLANGUAGE_UNKNOWN;
+  m_initialized = false;
 }
 
 // NB: this function has (desired) side effect of changing current locale
@@ -619,6 +1385,10 @@ bool wxLocale::Init(const wxChar *szName,
                     bool        bLoadDefault,
                     bool        bConvertEncoding)
 {
+  wxASSERT_MSG( !m_initialized,
+                _T("you can't call wxLocale::Init more than once") );
+  
+  m_initialized = true;
   m_strLocale = szName;
   m_strShort = szShort;
   m_bConvertEncoding = bConvertEncoding;
@@ -661,7 +1431,7 @@ bool wxLocale::Init(const wxChar *szName,
   if ( m_strShort.IsEmpty() ) {
     // FIXME I don't know how these 2 letter abbreviations are formed,
     //       this wild guess is surely wrong
-    if ( szLocale[0] )
+    if ( szLocale && szLocale[0] )
     {
         m_strShort += (wxChar)wxTolower(szLocale[0]);
         if ( szLocale[1] )
@@ -807,7 +1577,11 @@ bool wxLocale::Init(int language, int flags)
         }
         else
         {
-            int codepage = -1;
+            int codepage 
+                         #ifdef SETLOCALE_FAILS_ON_UNICODE_LANGS
+                         = -1
+                         #endif
+                         ;
             wxUint32 lcid = MAKELCID(MAKELANGID(info->WinLang, info->WinSublang),
                                      SORT_DEFAULT);
             // FIXME
@@ -891,7 +1665,7 @@ bool wxLocale::Init(int language, int flags)
                     (flags & wxLOCALE_CONV_ENCODING) != 0);
     free(szLocale);
 
-    if ( ret )
+    if (IsOk()) // setlocale() succeeded
         m_language = lang;
 
     return ret;
@@ -1384,7 +2158,7 @@ wxString wxLocale::GetSystemEncodingName()
     // to Unix98)
     char *oldLocale = strdup(setlocale(LC_CTYPE, NULL));
     setlocale(LC_CTYPE, "");
-    char *alang = nl_langinfo(CODESET);
+    const char *alang = nl_langinfo(CODESET);
     setlocale(LC_CTYPE, oldLocale);
     free(oldLocale);
 
@@ -1470,6 +2244,8 @@ wxFontEncoding wxLocale::GetSystemEncoding()
     {
         return wxFONTENCODING_CP950;
     }
+#elif defined(__WXMAC__)
+    return wxMacGetFontEncFromSystemEnc( CFStringGetSystemEncoding() ) ;
 #elif defined(__UNIX_LIKE__) && wxUSE_FONTMAP
     wxString encname = GetSystemEncodingName();
     if ( !encname.empty() )
@@ -1608,9 +2384,17 @@ wxLocale::~wxLocale()
 // get the translation of given string in current locale
 const wxChar *wxLocale::GetString(const wxChar *szOrigString,
                                   const wxChar *szDomain) const
+{
+    return GetString(szOrigString, szOrigString, size_t(-1), szDomain);
+}
+
+const wxChar *wxLocale::GetString(const wxChar *szOrigString,
+                                  const wxChar *szOrigString2,
+                                  size_t n,
+                                  const wxChar *szDomain) const
 {
     if ( wxIsEmpty(szOrigString) )
-        return _T("");
+        return wxEmptyString;
 
     const wxChar *pszTrans = NULL;
     wxMsgCatalog *pMsgCat;
@@ -1621,14 +2405,14 @@ const wxChar *wxLocale::GetString(const wxChar *szOrigString,
 
         // does the catalog exist?
         if ( pMsgCat != NULL )
-            pszTrans = pMsgCat->GetString(szOrigString);
+            pszTrans = pMsgCat->GetString(szOrigString, n);
     }
     else
     {
         // search in all domains
         for ( pMsgCat = m_pMsgCat; pMsgCat != NULL; pMsgCat = pMsgCat->m_pNext )
         {
-            pszTrans = pMsgCat->GetString(szOrigString);
+            pszTrans = pMsgCat->GetString(szOrigString, n);
             if ( pszTrans != NULL )   // take the first found
                 break;
         }
@@ -1644,19 +2428,24 @@ const wxChar *wxLocale::GetString(const wxChar *szOrigString,
             if ( szDomain != NULL )
             {
                 wxLogTrace(_T("i18n"),
-                           _T("string '%s' not found in domain '%s' for locale '%s'."),
-                           szOrigString, szDomain, m_strLocale.c_str());
+                           _T("string '%s'[%lu] not found in domain '%s' for locale '%s'."),
+                           szOrigString, (unsigned long)n,
+                           szDomain, m_strLocale.c_str());
+
             }
             else
             {
                 wxLogTrace(_T("i18n"),
-                           _T("string '%s' not found in locale '%s'."),
-                           szOrigString, m_strLocale.c_str());
+                           _T("string '%s'[%lu] not found in locale '%s'."),
+                           szOrigString, (unsigned long)n, m_strLocale.c_str());
             }
         }
 #endif // __WXDEBUG__
 
-        return szOrigString;
+        if (n == size_t(-1))
+            return szOrigString;
+        else
+            return n == 1 ? szOrigString : szOrigString2;
     }
 
     return pszTrans;
@@ -1699,6 +2488,11 @@ bool wxLocale::AddCatalog(const wxChar *szDomain)
     // don't add it because it couldn't be loaded anyway
     delete pMsgCat;
 
+    // it's OK to not load English catalog, the texts are embedded in
+    // the program:
+    if (m_strShort.Mid(0, 2) == wxT("en"))
+        return TRUE;
+
     return FALSE;
   }
 }
@@ -2511,7 +3305,7 @@ void wxLocale::InitLanguagesDB()
    LNG(wxLANGUAGE_SWAHILI,                    "sw_KE", LANG_SWAHILI   , SUBLANG_DEFAULT                   , "Swahili")
    LNG(wxLANGUAGE_SWEDISH,                    "sv_SE", LANG_SWEDISH   , SUBLANG_SWEDISH                   , "Swedish")
    LNG(wxLANGUAGE_SWEDISH_FINLAND,            "sv_FI", LANG_SWEDISH   , SUBLANG_SWEDISH_FINLAND           , "Swedish (Finland)")
-   LNG(wxLANGUAGE_TAGALOG,                    "tl"   , 0              , 0                                 , "Tagalog")
+   LNG(wxLANGUAGE_TAGALOG,                    "tl_PH", 0              , 0                                 , "Tagalog")
    LNG(wxLANGUAGE_TAJIK,                      "tg"   , 0              , 0                                 , "Tajik")
    LNG(wxLANGUAGE_TAMIL,                      "ta"   , LANG_TAMIL     , SUBLANG_DEFAULT                   , "Tamil")
    LNG(wxLANGUAGE_TATAR,                      "tt"   , LANG_TATAR     , SUBLANG_DEFAULT                   , "Tatar")