X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c958260b3886cb83aa93c7508d0986c6433ce165..56601ff2db94ccc874107eb60c4564ceb47f6d02:/docs/latex/wx/encconv.tex diff --git a/docs/latex/wx/encconv.tex b/docs/latex/wx/encconv.tex index 45e630294b..daa9c3dd95 100644 --- a/docs/latex/wx/encconv.tex +++ b/docs/latex/wx/encconv.tex @@ -3,18 +3,41 @@ % encconv.h at 30/Dec/99 18:45:16 % - \section{\class{wxEncodingConverter}}\label{wxencodingconverter} -This class is capable of converting strings between any two -8bit encodings/charsets. It can also convert from/to Unicode (but only -if you compiled wxWindows with wxUSE_UNICODE set to 1). +This class is capable of converting strings between two +8-bit encodings/charsets. It can also convert from/to Unicode (but only +if you compiled wxWidgets with wxUSE\_WCHAR\_T set to 1). Only a limited subset +of encodings is supported by wxEncodingConverter: +{\tt wxFONTENCODING\_ISO8859\_1..15}, {\tt wxFONTENCODING\_CP1250..1257} and +{\tt wxFONTENCODING\_KOI8}. + +\wxheading{Note} +Please use \helpref{wxMBConv classes}{mbconvclasses} instead +if possible. \helpref{wxCSConv}{wxcsconv} has much better support for various +encodings than wxEncodingConverter. wxEncodingConverter is useful only +if you rely on {\tt wxCONVERT\_SUBSTITUTE} mode of operation (see +\helpref{Init}{wxencodingconverterinit}). \wxheading{Derived from} \helpref{wxObject}{wxobject} +\wxheading{Include files} + + + +\wxheading{Library} + +\helpref{wxBase}{librarieslist} + +\wxheading{See also} + +\helpref{wxFontMapper}{wxfontmapper}, +\helpref{wxMBConv}{wxmbconv}, +\helpref{Writing non-English applications}{nonenglishoverview} + \latexignore{\rtfignore{\wxheading{Members}}} @@ -25,62 +48,101 @@ if you compiled wxWindows with wxUSE_UNICODE set to 1). Constructor. + \membersection{wxEncodingConverter::Init}\label{wxencodingconverterinit} \func{bool}{Init}{\param{wxFontEncoding }{input\_enc}, \param{wxFontEncoding }{output\_enc}, \param{int }{method = wxCONVERT\_STRICT}} -Initialize convertion. Both output or input encoding may +Initialize conversion. Both output or input encoding may be wxFONTENCODING\_UNICODE, but only if wxUSE\_ENCODING is set to 1. All subsequent calls to \helpref{Convert()}{wxencodingconverterconvert} -will interpret it's argument -as a string in {\it input\_enc} encoding and will output string in +will interpret its argument +as a string in {\it input\_enc} encoding and will output string in {\it output\_enc} encoding. You must call this method before calling Convert. You may call it more than once in order to switch to another conversion. {\it Method} affects behaviour of Convert() in case input character cannot be converted because it does not exist in output encoding: -\begin{twocollist} +\begin{twocollist}\itemsep=0pt \twocolitem{{\bf wxCONVERT\_STRICT}}{follow behaviour of GNU Recode - -just copy unconvertable characters to output and don't change them +just copy unconvertible characters to output and don't change them (its integer value will stay the same)} \twocolitem{{\bf wxCONVERT\_SUBSTITUTE}}{try some (lossy) substitutions -- e.g. replace unconvertable latin capitals with acute by ordinary +- e.g. replace unconvertible latin capitals with acute by ordinary capitals, replace en-dash or em-dash by '-' etc.} \end{twocollist} -Both modes gurantee that output string will have same length +Both modes guarantee that output string will have same length as input string. \wxheading{Return value} -FALSE if given conversion is impossible, TRUE otherwise +false if given conversion is impossible, true otherwise (conversion may be impossible either if you try to convert -to Unicode with non-Unicode build of wxWindows or if input +to Unicode with non-Unicode build of wxWidgets or if input or output encoding is not supported.) +\membersection{wxEncodingConverter::CanConvert}\label{wxencodingconvertercanconvert} + +\func{static bool}{CanConvert}{\param{wxFontEncoding }{encIn}, \param{wxFontEncoding }{encOut}} + +Return true if (any text in) multibyte encoding \arg{encIn} can be converted to +another one ({\it encOut}) losslessly. + +Do not call this method with \texttt{wxFONTENCODING\_UNICODE} as either +parameter, it doesn't make sense (always works in one sense and always depends +on the text to convert in the other). + + \membersection{wxEncodingConverter::Convert}\label{wxencodingconverterconvert} -\func{wxString}{Convert}{\param{const wxString\& }{input}} +\constfunc{bool}{Convert}{\param{const char* }{input}, \param{char* }{output}} -\func{void}{Convert}{\param{const wxChar* }{input}, \param{wxChar* }{output}} +\constfunc{bool}{Convert}{\param{const wchar\_t* }{input}, \param{wchar\_t* }{output}} -\func{void}{Convert}{\param{wxChar* }{str}} +\constfunc{bool}{Convert}{\param{const char* }{input}, \param{wchar\_t* }{output}} -Convert input string according to settings passed to \helpref{Init}{wxencodingconverterinit}. -Note that you must call Init before using Convert! +\constfunc{bool}{Convert}{\param{const wchar\_t* }{input}, \param{char* }{output}} +Convert input string according to settings passed to +\helpref{Init}{wxencodingconverterinit} and writes the result to {\it output}. + +\constfunc{bool}{Convert}{\param{char* }{str}} + +\constfunc{bool}{Convert}{\param{wchar\_t* }{str}} + +Convert input string according to settings passed to +\helpref{Init}{wxencodingconverterinit} in-place, i.e. write the result to the +same memory area. + +All of the versions above return \true if the conversion was lossless and +\false if at least one of the characters couldn't be converted and was replaced +with {\tt '?'} in the output. Note that if {\tt wxCONVERT\_SUBSTITUTE} was +passed to \helpref{Init}{wxencodingconverterinit}, substitution is considered +lossless operation. + +\constfunc{wxString}{Convert}{\param{const wxString\& }{input}} + +Convert wxString and return new wxString object. + +\wxheading{Notes} + +You must call \helpref{Init}{wxencodingconverterinit} before using this method! + +{\tt wchar\_t} versions of the method are not available if wxWidgets was compiled +with {\tt wxUSE\_WCHAR\_T} set to 0. \membersection{wxEncodingConverter::GetPlatformEquivalents}\label{wxencodingconvertergetplatformequivalents} -\func{wxFontEncodingArray}{GetPlatformEquivalents}{\param{wxFontEncoding }{enc}, \param{int }{platform = wxPLATFORM\_CURRENT}} +\func{static wxFontEncodingArray}{GetPlatformEquivalents}{\param{wxFontEncoding }{enc}, \param{int }{platform = wxPLATFORM\_CURRENT}} Return equivalents for given font that are used under given platform. Supported platforms: -\begin{itemize} +\begin{itemize}\itemsep=0pt \item wxPLATFORM\_UNIX \item wxPLATFORM\_WINDOWS \item wxPLATFORM\_OS2 @@ -88,9 +150,10 @@ under given platform. Supported platforms: \item wxPLATFORM\_CURRENT \end{itemize} -wxPLATFORM\_CURRENT means the plaform this binary was compiled for. +wxPLATFORM\_CURRENT means the platform this binary was compiled for. Examples: + \begin{verbatim} current platform enc returned value ---------------------------------------------- @@ -101,10 +164,10 @@ unix CP1252 {ISO8859_1,ISO8859_15} \end{verbatim} Equivalence is defined in terms of convertibility: -2 encodings are equivalent if you can convert text between -then without loosing information (it may - and will - happen -that you loose special chars like quotation marks or em-dashes -but you shouldn't loose any diacritics and language-specific +two encodings are equivalent if you can convert text between +then without losing information (it may - and will - happen +that you lose special chars like quotation marks or em-dashes +but you shouldn't lose any diacritics and language-specific characters when converting between equivalent encodings). Remember that this function does {\bf NOT} check for presence of @@ -113,23 +176,28 @@ encodings. (It usually returns only one encoding.) \wxheading{Notes} -\begin{itemize} -\item Note that argument {\it enc} itself may be present in returned array! -(So that you can - as a side effect - detect whether the -encoding is native for this platform or not.) - -\item helpref{Convert}{wxencodingconverterconvert} is not limited to -converting between equivalent encodings, it can convert between arbitrary -two encodings! +\begin{itemize}\itemsep=0pt +\item Note that argument {\it enc} itself may be present in the returned array, +so that you can, as a side-effect, detect whether the +encoding is native for this platform or not. +\item \helpref{Convert}{wxencodingconverterconvert} is not limited to +converting between equivalent encodings, it can convert between two arbitrary +encodings. +\item If {\it enc} is present in the returned array, then it is {\bf always} the first +item of it. +\item Please note that the returned array may contain no items at all. \end{itemize} \membersection{wxEncodingConverter::GetAllEquivalents}\label{wxencodingconvertergetallequivalents} -\func{wxFontEncodingArray}{GetAllEquivalents}{\param{wxFontEncoding }{enc}} +\func{static wxFontEncodingArray}{GetAllEquivalents}{\param{wxFontEncoding }{enc}} Similar to \helpref{GetPlatformEquivalents}{wxencodingconvertergetplatformequivalents}, but this one will return ALL -equivalent encodings, regardless the platform, and including itself. +equivalent encodings, regardless of the platform, and including itself. + +This platform's encodings are before others in the array. And again, if {\it enc} is in the array, +it is the very first item in it.