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tqt3/tools/linguist/lupdate/fetchtr.cpp

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/**********************************************************************
** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
**
** This file is part of TQt Linguist.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid TQt Commercial licenses may use this file in
** accordance with the TQt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include <metatranslator.h>
#include <ntqfile.h>
#include <ntqregexp.h>
#include <ntqstring.h>
#include <ntqtextstream.h>
#include <ntqvaluestack.h>
#include <ntqxml.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
/* qmake ignore TQ_OBJECT */
static const char MagicComment[] = "TRANSLATOR ";
static TQMap<TQCString, int> needs_TQ_OBJECT;
static TQMap<TQCString, int> lacks_TQ_OBJECT;
/*
The first part of this source file is the C++ tokenizer. We skip
most of C++; the only tokens that interest us are defined here.
Thus, the code fragment
int main()
{
printf( "Hello, world!\n" );
return 0;
}
is broken down into the following tokens (Tok_ omitted):
Ident Ident LeftParen RightParen
LeftBrace
Ident LeftParen String RightParen Semicolon
return Semicolon
RightBrace.
The 0 doesn't produce any token.
*/
enum { Tok_Eof, Tok_class, Tok_namespace, Tok_return, Tok_tr,
Tok_trUtf8, Tok_translate, Tok_TQ_OBJECT, Tok_Ident,
Tok_Comment, Tok_String, Tok_Arrow, Tok_Colon,
Tok_Gulbrandsen, Tok_LeftBrace, Tok_RightBrace, Tok_LeftParen,
Tok_RightParen, Tok_Comma, Tok_Semicolon };
/*
The tokenizer maintains the following global variables. The names
should be self-explanatory.
*/
static TQCString yyFileName;
static int yyCh;
static char yyIdent[128];
static size_t yyIdentLen;
static char yyComment[65536];
static size_t yyCommentLen;
static char yyString[65536];
static size_t yyStringLen;
static TQValueStack<int> yySavedBraceDepth;
static TQValueStack<int> yySavedParenDepth;
static int yyBraceDepth;
static int yyParenDepth;
static int yyLineNo;
static int yyCurLineNo;
static int yyBraceLineNo;
static int yyParenLineNo;
// the file to read from (if reading from a file)
static FILE *yyInFile;
// the string to read from and current position in the string (otherwise)
static TQString yyInStr;
static int yyInPos;
static int (*getChar)();
static int getCharFromFile()
{
int c = getc( yyInFile );
if ( c == '\n' )
yyCurLineNo++;
return c;
}
static int getCharFromString()
{
if ( yyInPos == (int) yyInStr.length() ) {
return EOF;
} else {
return yyInStr[yyInPos++].latin1();
}
}
static void startTokenizer( const char *fileName, int (*getCharFunc)() )
{
yyInPos = 0;
getChar = getCharFunc;
yyFileName = fileName;
yyCh = getChar();
yySavedBraceDepth.clear();
yySavedParenDepth.clear();
yyBraceDepth = 0;
yyParenDepth = 0;
yyCurLineNo = 1;
yyBraceLineNo = 1;
yyParenLineNo = 1;
}
static int getToken()
{
const char tab[] = "abfnrtv";
const char backTab[] = "\a\b\f\n\r\t\v";
uint n;
yyIdentLen = 0;
yyCommentLen = 0;
yyStringLen = 0;
while ( yyCh != EOF ) {
yyLineNo = yyCurLineNo;
if ( isalpha(yyCh) || yyCh == '_' ) {
do {
if ( yyIdentLen < sizeof(yyIdent) - 1 )
yyIdent[yyIdentLen++] = (char) yyCh;
yyCh = getChar();
} while ( isalnum(yyCh) || yyCh == '_' );
yyIdent[yyIdentLen] = '\0';
switch ( yyIdent[0] ) {
case 'Q':
if ( strcmp(yyIdent + 1, "_OBJECT") == 0 ) {
return Tok_TQ_OBJECT;
} else if ( strcmp(yyIdent + 1, "T_TR_NOOP") == 0 ) {
return Tok_tr;
} else if ( strcmp(yyIdent + 1, "T_TRANSLATE_NOOP") == 0 ) {
return Tok_translate;
}
break;
case 'T':
// TR() for when all else fails
if ( tqstricmp(yyIdent + 1, "R") == 0 )
return Tok_tr;
break;
case 'c':
if ( strcmp(yyIdent + 1, "lass") == 0 )
return Tok_class;
break;
case 'f':
/*
TQTranslator::findMessage() has the same parameters as
TQApplication::translate().
*/
if ( strcmp(yyIdent + 1, "indMessage") == 0 )
return Tok_translate;
break;
case 'n':
if ( strcmp(yyIdent + 1, "amespace") == 0 )
return Tok_namespace;
break;
case 'r':
if ( strcmp(yyIdent + 1, "eturn") == 0 )
return Tok_return;
break;
case 's':
if ( strcmp(yyIdent + 1, "truct") == 0 )
return Tok_class;
break;
case 't':
if ( strcmp(yyIdent + 1, "r") == 0 ) {
return Tok_tr;
} else if ( qstrcmp(yyIdent + 1, "rUtf8") == 0 ) {
return Tok_trUtf8;
} else if ( qstrcmp(yyIdent + 1, "ranslate") == 0 ) {
return Tok_translate;
}
}
return Tok_Ident;
} else {
switch ( yyCh ) {
case '#':
/*
Early versions of lupdate complained about
unbalanced braces in the following code:
#ifdef ALPHA
while ( beta ) {
#else
while ( gamma ) {
#endif
delta;
}
The code contains, indeed, two opening braces for
one closing brace; yet there's no reason to panic.
The solution is to remember yyBraceDepth as it was
when #if, #ifdef or #ifndef was met, and to set
yyBraceDepth to that value when meeting #elif or
#else.
*/
do {
yyCh = getChar();
} while ( isspace(yyCh) && yyCh != '\n' );
switch ( yyCh ) {
case 'i':
yyCh = getChar();
if ( yyCh == 'f' ) {
// if, ifdef, ifndef
yySavedBraceDepth.push( yyBraceDepth );
yySavedParenDepth.push( yyParenDepth );
}
break;
case 'e':
yyCh = getChar();
if ( yyCh == 'l' ) {
// elif, else
if ( !yySavedBraceDepth.isEmpty() ) {
yyBraceDepth = yySavedBraceDepth.top();
yyParenDepth = yySavedParenDepth.top();
}
} else if ( yyCh == 'n' ) {
// endif
if ( !yySavedBraceDepth.isEmpty() ) {
yySavedBraceDepth.pop();
yySavedParenDepth.pop();
}
}
}
while ( isalnum(yyCh) || yyCh == '_' )
yyCh = getChar();
break;
case '/':
yyCh = getChar();
if ( yyCh == '/' ) {
do {
yyCh = getChar();
} while ( yyCh != EOF && yyCh != '\n' );
} else if ( yyCh == '*' ) {
bool metAster = FALSE;
bool metAsterSlash = FALSE;
while ( !metAsterSlash ) {
yyCh = getChar();
if ( yyCh == EOF ) {
fprintf( stderr,
"%s: Unterminated C++ comment starting at"
" line %d\n",
(const char *) yyFileName, yyLineNo );
yyComment[yyCommentLen] = '\0';
return Tok_Comment;
}
if ( yyCommentLen < sizeof(yyComment) - 1 )
yyComment[yyCommentLen++] = (char) yyCh;
if ( yyCh == '*' )
metAster = TRUE;
else if ( metAster && yyCh == '/' )
metAsterSlash = TRUE;
else
metAster = FALSE;
}
yyCh = getChar();
yyCommentLen -= 2;
yyComment[yyCommentLen] = '\0';
return Tok_Comment;
}
break;
case '"':
yyCh = getChar();
while ( yyCh != EOF && yyCh != '\n' && yyCh != '"' ) {
if ( yyCh == '\\' ) {
yyCh = getChar();
if ( yyCh == '\n' ) {
yyCh = getChar();
} else if ( yyCh == 'x' ) {
TQCString hex = "0";
yyCh = getChar();
while ( isxdigit(yyCh) ) {
hex += (char) yyCh;
yyCh = getChar();
}
sscanf( hex, "%x", &n );
if ( yyStringLen < sizeof(yyString) - 1 )
yyString[yyStringLen++] = (char) n;
} else if ( yyCh >= '0' && yyCh < '8' ) {
TQCString oct = "";
do {
oct += (char) yyCh;
yyCh = getChar();
} while ( yyCh >= '0' && yyCh < '8' );
sscanf( oct, "%o", &n );
if ( yyStringLen < sizeof(yyString) - 1 )
yyString[yyStringLen++] = (char) n;
} else {
const char *p = strchr( tab, yyCh );
if ( yyStringLen < sizeof(yyString) - 1 )
yyString[yyStringLen++] = ( p == 0 ) ?
(char) yyCh : backTab[p - tab];
yyCh = getChar();
}
} else {
if ( yyStringLen < sizeof(yyString) - 1 )
yyString[yyStringLen++] = (char) yyCh;
yyCh = getChar();
}
}
yyString[yyStringLen] = '\0';
if ( yyCh != '"' )
tqWarning( "%s:%d: Unterminated C++ string",
(const char *) yyFileName, yyLineNo );
if ( yyCh == EOF ) {
return Tok_Eof;
} else {
yyCh = getChar();
return Tok_String;
}
break;
case '-':
yyCh = getChar();
if ( yyCh == '>' ) {
yyCh = getChar();
return Tok_Arrow;
}
break;
case ':':
yyCh = getChar();
if ( yyCh == ':' ) {
yyCh = getChar();
return Tok_Gulbrandsen;
}
return Tok_Colon;
case '\'':
yyCh = getChar();
if ( yyCh == '\\' )
yyCh = getChar();
do {
yyCh = getChar();
} while ( yyCh != EOF && yyCh != '\'' );
yyCh = getChar();
break;
case '{':
if (yyBraceDepth == 0)
yyBraceLineNo = yyCurLineNo;
yyBraceDepth++;
yyCh = getChar();
return Tok_LeftBrace;
case '}':
if (yyBraceDepth == 0)
yyBraceLineNo = yyCurLineNo;
yyBraceDepth--;
yyCh = getChar();
return Tok_RightBrace;
case '(':
if (yyParenDepth == 0)
yyParenLineNo = yyCurLineNo;
yyParenDepth++;
yyCh = getChar();
return Tok_LeftParen;
case ')':
if (yyParenDepth == 0)
yyParenLineNo = yyCurLineNo;
yyParenDepth--;
yyCh = getChar();
return Tok_RightParen;
case ',':
yyCh = getChar();
return Tok_Comma;
case ';':
yyCh = getChar();
return Tok_Semicolon;
default:
yyCh = getChar();
}
}
}
return Tok_Eof;
}
/*
The second part of this source file is the parser. It accomplishes
a very easy task: It finds all strings inside a tr() or translate()
call, and possibly finds out the context of the call. It supports
three cases: (1) the context is specified, as in
FunnyDialog::tr("Hello") or translate("FunnyDialog", "Hello");
(2) the call appears within an inlined function; (3) the call
appears within a function defined outside the class definition.
*/
static int yyTok;
static bool match( int t )
{
bool matches = ( yyTok == t );
if ( matches )
yyTok = getToken();
return matches;
}
static bool matchString( TQCString *s )
{
bool matches = ( yyTok == Tok_String );
*s = "";
while ( yyTok == Tok_String ) {
*s += yyString;
yyTok = getToken();
}
return matches;
}
static bool matchEncoding( bool *utf8 )
{
if ( yyTok == Tok_Ident ) {
if ( strcmp(yyIdent, "TQApplication") == 0 ) {
yyTok = getToken();
if ( yyTok == Tok_Gulbrandsen )
yyTok = getToken();
}
*utf8 = TQString( yyIdent ).endsWith( TQString("UTF8") );
yyTok = getToken();
return TRUE;
} else {
return FALSE;
}
}
static void parse( MetaTranslator *tor, const char *initialContext,
const char *defaultContext )
{
TQMap<TQCString, TQCString> qualifiedContexts;
TQStringList namespaces;
TQCString context;
TQCString text;
TQCString com;
TQCString functionContext = initialContext;
TQCString prefix;
bool utf8 = FALSE;
bool missing_TQ_OBJECT = FALSE;
yyTok = getToken();
while ( yyTok != Tok_Eof ) {
switch ( yyTok ) {
case Tok_class:
/*
Partial support for inlined functions.
*/
yyTok = getToken();
if ( yyBraceDepth == (int) namespaces.count() &&
yyParenDepth == 0 ) {
do {
/*
This code should execute only once, but we play
safe with impure definitions such as
'class TQ_EXPORT TQMessageBox', in which case
'TQMessageBox' is the class name, not 'TQ_EXPORT'.
*/
functionContext = yyIdent;
yyTok = getToken();
} while ( yyTok == Tok_Ident );
while ( yyTok == Tok_Gulbrandsen ) {
yyTok = getToken();
functionContext += "::";
functionContext += yyIdent;
yyTok = getToken();
}
if ( yyTok == Tok_Colon ) {
missing_TQ_OBJECT = TRUE;
} else {
functionContext = defaultContext;
}
}
break;
case Tok_namespace:
yyTok = getToken();
if ( yyTok == Tok_Ident ) {
TQCString ns = yyIdent;
yyTok = getToken();
if ( yyTok == Tok_LeftBrace &&
yyBraceDepth == (int) namespaces.count() + 1 )
namespaces.append( TQString(ns) );
}
break;
case Tok_tr:
case Tok_trUtf8:
utf8 = ( yyTok == Tok_trUtf8 );
yyTok = getToken();
if ( match(Tok_LeftParen) && matchString(&text) ) {
com = "";
if ( match(Tok_RightParen) || (match(Tok_Comma) &&
matchString(&com) && match(Tok_RightParen)) ) {
if ( prefix.isNull() ) {
context = functionContext;
if ( !namespaces.isEmpty() )
context.prepend( (namespaces.join(TQString("::")) +
TQString("::")).latin1() );
} else {
context = prefix;
}
prefix = (const char *) 0;
if ( qualifiedContexts.contains(context) )
context = qualifiedContexts[context];
tor->insert( MetaTranslatorMessage(context, text, com,
TQString::null, utf8) );
if ( lacks_TQ_OBJECT.contains(context) ) {
tqWarning( "%s:%d: Class '%s' lacks TQ_OBJECT macro",
(const char *) yyFileName, yyLineNo,
(const char *) context );
lacks_TQ_OBJECT.remove( context );
} else {
needs_TQ_OBJECT.insert( context, 0 );
}
}
}
break;
case Tok_translate:
utf8 = FALSE;
yyTok = getToken();
if ( match(Tok_LeftParen) &&
matchString(&context) &&
match(Tok_Comma) &&
matchString(&text) ) {
com = "";
if ( match(Tok_RightParen) ||
(match(Tok_Comma) &&
matchString(&com) &&
(match(Tok_RightParen) ||
(match(Tok_Comma) &&
matchEncoding(&utf8) &&
match(Tok_RightParen)))) )
tor->insert( MetaTranslatorMessage(context, text, com,
TQString::null, utf8) );
}
break;
case Tok_TQ_OBJECT:
missing_TQ_OBJECT = FALSE;
yyTok = getToken();
break;
case Tok_Ident:
if ( !prefix.isNull() )
prefix += "::";
prefix += yyIdent;
yyTok = getToken();
if ( yyTok != Tok_Gulbrandsen )
prefix = (const char *) 0;
break;
case Tok_Comment:
com = yyComment;
com = com.simplifyWhiteSpace();
if ( com.left(sizeof(MagicComment) - 1) == MagicComment ) {
com.remove( 0, sizeof(MagicComment) - 1 );
int k = com.find( ' ' );
if ( k == -1 ) {
context = com;
} else {
context = com.left( k );
com.remove( 0, k + 1 );
tor->insert( MetaTranslatorMessage(context, "", com,
TQString::null, FALSE) );
}
/*
Provide a backdoor for people using "using
namespace". See the manual for details.
*/
k = 0;
while ( (k = context.find("::", k)) != -1 ) {
qualifiedContexts.insert( context.mid(k + 2), context );
k++;
}
}
yyTok = getToken();
break;
case Tok_Arrow:
yyTok = getToken();
if ( yyTok == Tok_tr || yyTok == Tok_trUtf8 )
tqWarning( "%s:%d: Cannot invoke tr() like this",
(const char *) yyFileName, yyLineNo );
break;
case Tok_Gulbrandsen:
// at top level?
if ( yyBraceDepth == (int) namespaces.count() && yyParenDepth == 0 )
functionContext = prefix;
yyTok = getToken();
break;
case Tok_RightBrace:
case Tok_Semicolon:
if ( yyBraceDepth >= 0 &&
yyBraceDepth + 1 == (int) namespaces.count() )
namespaces.remove( namespaces.fromLast() );
if ( yyBraceDepth == (int) namespaces.count() ) {
if ( missing_TQ_OBJECT ) {
if ( needs_TQ_OBJECT.contains(functionContext) ) {
tqWarning( "%s:%d: Class '%s' lacks TQ_OBJECT macro",
(const char *) yyFileName, yyLineNo,
(const char *) functionContext );
} else {
lacks_TQ_OBJECT.insert( functionContext, 0 );
}
}
functionContext = defaultContext;
missing_TQ_OBJECT = FALSE;
}
yyTok = getToken();
break;
default:
yyTok = getToken();
}
}
if ( yyBraceDepth != 0 )
fprintf( stderr,
"%s:%d: Unbalanced braces in C++ code (or abuse of the C++"
" preprocessor)\n",
(const char *)yyFileName, yyBraceLineNo );
else if ( yyParenDepth != 0 )
fprintf( stderr,
"%s:%d: Unbalanced parentheses in C++ code (or abuse of the C++"
" preprocessor)\n",
(const char *)yyFileName, yyParenLineNo );
}
void fetchtr_cpp( const char *fileName, MetaTranslator *tor,
const char *defaultContext, bool mustExist )
{
yyInFile = fopen( fileName, "r" );
if ( yyInFile == 0 ) {
if ( mustExist )
fprintf( stderr,
"lupdate error: Cannot open C++ source file '%s': %s\n",
fileName, strerror(errno) );
return;
}
startTokenizer( fileName, getCharFromFile );
parse( tor, 0, defaultContext );
fclose( yyInFile );
}
/*
In addition to C++, we support TQt Designer UI files.
*/
/*
Fetches tr() calls in C++ code in UI files (inside "<function>"
tag). This mechanism is obsolete.
*/
void fetchtr_inlined_cpp( const char *fileName, const TQString& in,
MetaTranslator *tor, const char *context )
{
yyInStr = in;
startTokenizer( fileName, getCharFromString );
parse( tor, context, 0 );
yyInStr = TQString::null;
}
class UiHandler : public TQXmlDefaultHandler
{
public:
UiHandler( MetaTranslator *translator, const char *fileName )
: tor( translator ), fname( fileName ), comment( "" ) { }
virtual bool startElement( const TQString& namespaceURI,
const TQString& localName, const TQString& qName,
const TQXmlAttributes& atts );
virtual bool endElement( const TQString& namespaceURI,
const TQString& localName, const TQString& qName );
virtual bool characters( const TQString& ch );
virtual bool fatalError( const TQXmlParseException& exception );
private:
void flush();
MetaTranslator *tor;
TQCString fname;
TQString context;
TQString source;
TQString comment;
TQString accum;
};
bool UiHandler::startElement( const TQString& /* namespaceURI */,
const TQString& /* localName */,
const TQString& qName,
const TQXmlAttributes& atts )
{
if ( qName == TQString("item") ) {
flush();
if ( !atts.value(TQString("text")).isEmpty() )
source = atts.value( TQString("text") );
} else if ( qName == TQString("string") ) {
flush();
}
accum.truncate( 0 );
return TRUE;
}
bool UiHandler::endElement( const TQString& /* namespaceURI */,
const TQString& /* localName */,
const TQString& qName )
{
accum.replace( TQRegExp(TQString("\r\n")), "\n" );
if ( qName == TQString("class") ) {
if ( context.isEmpty() )
context = accum;
} else if ( qName == TQString("string") ) {
source = accum;
} else if ( qName == TQString("comment") ) {
comment = accum;
flush();
} else if ( qName == TQString("function") ) {
fetchtr_inlined_cpp( (const char *) fname, accum, tor,
context.latin1() );
} else {
flush();
}
return TRUE;
}
bool UiHandler::characters( const TQString& ch )
{
accum += ch;
return TRUE;
}
bool UiHandler::fatalError( const TQXmlParseException& exception )
{
TQString msg;
msg.sprintf( "Parse error at line %d, column %d (%s).",
exception.lineNumber(), exception.columnNumber(),
exception.message().latin1() );
fprintf( stderr, "XML error: %s\n", msg.latin1() );
return FALSE;
}
void UiHandler::flush()
{
if ( !context.isEmpty() && !source.isEmpty() )
tor->insert( MetaTranslatorMessage(context.utf8(), source.utf8(),
comment.utf8(), TQString::null,
TRUE) );
source.truncate( 0 );
comment.truncate( 0 );
}
void fetchtr_ui( const char *fileName, MetaTranslator *tor,
const char * /* defaultContext */, bool mustExist )
{
TQFile f( fileName );
if ( !f.open(IO_ReadOnly) ) {
if ( mustExist )
fprintf( stderr, "lupdate error: cannot open UI file '%s': %s\n",
fileName, strerror(errno) );
return;
}
TQTextStream t( &f );
TQXmlInputSource in( t );
TQXmlSimpleReader reader;
reader.setFeature( "http://xml.org/sax/features/namespaces", FALSE );
reader.setFeature( "http://xml.org/sax/features/namespace-prefixes", TRUE );
reader.setFeature( "http://trolltech.com/xml/features/report-whitespace"
"-only-CharData", FALSE );
TQXmlDefaultHandler *hand = new UiHandler( tor, fileName );
reader.setContentHandler( hand );
reader.setErrorHandler( hand );
if ( !reader.parse(in) )
fprintf( stderr, "%s: Parse error in UI file\n", fileName );
reader.setContentHandler( 0 );
reader.setErrorHandler( 0 );
delete hand;
f.close();
}