@class wxEncodingConverter
@wxheader{encconv.h}
- 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:
+ 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:
@c wxFONTENCODING_ISO8859_1..15, @c wxFONTENCODING_CP1250..1257 and
@c wxFONTENCODING_KOI8.
+ @note
+
+ Please use wxMBConv classes instead if possible. wxCSConv has much better
+ support for various encodings than wxEncodingConverter.
+ wxEncodingConverter is useful only if you rely on wxCONVERT_SUBSTITUTE mode
+ of operation (see wxEncodingConverter::Init()).
+
@library{wxbase}
@category{misc}
- @see wxFontMapper, wxMBConv, @ref overview_nonenglishoverview "Writing
- non-English applications"
+ @see wxFontMapper, wxMBConv, @ref overview_nonenglish
*/
class wxEncodingConverter : public wxObject
{
/**
Return @true if (any text in) multibyte encoding @a encIn can be converted to
- another one (@e encOut) losslessly.
- Do not call this method with @c wxFONTENCODING_UNICODE as either
- parameter, it doesn't make sense (always works in one sense and always depends
+ another one (@a encOut) losslessly.
+
+ Do not call this method with @c 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).
*/
static bool CanConvert(wxFontEncoding encIn,
wxFontEncoding encOut);
- //@{
/**
- Convert wxString and return new wxString object.
+ @name Conversion functions
+
+ @{
+ */
+ /**
+ Convert input string according to settings passed to Init() and writes
+ the result to output.
+
+ All the Convert() function overloads return @true if the conversion was
+ lossless and @false if at least one of the characters couldn't be converted
+ was and replaced with '?' in the output.
+
+ Note that if @c wxCONVERT_SUBSTITUTE was passed to Init(), substitution is
+ considered a lossless operation.
+
+ @note You must call Init() before using this method!
+
+ @note wchar_t versions of the method are not available if wxWidgets was
+ compiled with @c wxUSE_WCHAR_T set to 0.
*/
bool Convert(const char* input, char* output) const;
- const bool Convert(const wchar_t* input, wchar_t* output) const;
- const bool Convert(const char* input, wchar_t* output) const;
- const bool Convert(const wchar_t* input, char* output) const;
- const bool Convert(char* str) const;
- const bool Convert(wchar_t* str) const;
- const wxString Convert(const wxString& input) const;
+ bool Convert(const wchar_t* input, wchar_t* output) const;
+ bool Convert(const char* input, wchar_t* output) const;
+ bool Convert(const wchar_t* input, char* output) const;
+
+ /**
+ Convert input string according to settings passed to Init() in-place,
+ i.e. write the result to the same memory area.
+
+ See the Convert(const char*,char*) const overload for more info.
+ */
+ bool Convert(char* str) const;
+ bool Convert(wchar_t* str) const;
+
+ /**
+ Convert a wxString and return a new wxString object.
+
+ See the Convert(const char*,char*) const overload for more info.
+ */
+ wxString Convert(const wxString& input) const;
//@}
+
/**
- Similar to
- GetPlatformEquivalents(),
- but this one will return ALL
+ Similar to GetPlatformEquivalents(), but this one will return ALL
equivalent encodings, regardless of the platform, and including itself.
- This platform's encodings are before others in the array. And again, if @a enc
- is in the array,
- it is the very first item in it.
+
+ This platform's encodings are before others in the array.
+ And again, if @a enc is in the array, it is the very first item in it.
*/
static wxFontEncodingArray GetAllEquivalents(wxFontEncoding enc);
/**
- Return equivalents for given font that are used
- under given platform. Supported platforms:
- wxPLATFORM_UNIX
- wxPLATFORM_WINDOWS
- wxPLATFORM_OS2
- wxPLATFORM_MAC
- wxPLATFORM_CURRENT
+ Return equivalents for given font that are used under given platform.
+
+ Supported platforms:
+ @li wxPLATFORM_UNIX
+ @li wxPLATFORM_WINDOWS
+ @li wxPLATFORM_OS2
+ @li wxPLATFORM_MAC
+ @li wxPLATFORM_CURRENT
+
wxPLATFORM_CURRENT means the platform this binary was compiled for.
+
Examples:
- Equivalence is defined in terms of convertibility:
- 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).
+ @verbatim
+ current platform enc returned value
+ ----------------------------------------------
+ unix CP1250 {ISO8859_2}
+ unix ISO8859_2 {ISO8859_2}
+ windows ISO8859_2 {CP1250}
+ unix CP1252 {ISO8859_1,ISO8859_15}
+ @endverbatim
+
+ Equivalence is defined in terms of convertibility: 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 @b NOT check for presence of
fonts in system. It only tells you what are most suitable
encodings. (It usually returns only one encoding.)
+
+ @note Note that argument 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.
+
+ @note Convert() is not limited to converting between equivalent encodings,
+ it can convert between two arbitrary encodings.
+
+ @note If @a enc is present in the returned array, then it is always the first
+ item of it.
+
+ @note Please note that the returned array may contain no items at all.
*/
static wxFontEncodingArray GetPlatformEquivalents(wxFontEncoding enc,
- int platform = wxPLATFORM_CURRENT);
+ int platform = wxPLATFORM_CURRENT);
/**
- Initialize conversion. Both output or input encoding may
- be wxFONTENCODING_UNICODE, but only if wxUSE_ENCODING is set to 1.
- All subsequent calls to Convert()
- will interpret its argument
+ Initialize the conversion.
+
+ Both output or input encoding may be wxFONTENCODING_UNICODE, but only
+ if wxUSE_ENCODING is set to 1.
+
+ All subsequent calls to Convert() will interpret its argument
as a string in @a input_enc encoding and will output string in
@a 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.
- @e Method affects behaviour of Convert() in case input character
- cannot be converted because it does not exist in output encoding:
- @b wxCONVERT_STRICT
-
- follow behaviour of GNU Recode -
- just copy unconvertible characters to output and don't change them
- (its integer value will stay the same)
-
- @b wxCONVERT_SUBSTITUTE
+ @a method affects behaviour of Convert() in case input character
+ cannot be converted because it does not exist in output encoding:
- try some (lossy) substitutions
- - e.g. replace unconvertible latin capitals with acute by ordinary
- capitals, replace en-dash or em-dash by '-' etc.
+ @li @b wxCONVERT_STRICT: follow behaviour of GNU Recode - just copy
+ unconvertible characters to output and don't change them
+ (its integer value will stay the same)
+ @li @b wxCONVERT_SUBSTITUTE: try some (lossy) substitutions - e.g.
+ replace unconvertible latin capitals with acute by ordinary
+ capitals, replace en-dash or em-dash by '-' etc.
Both modes guarantee that output string will have same length
as input string.
+
+ @return @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 wxWidgets or if input
+ or output encoding is not supported).
*/
bool Init(wxFontEncoding input_enc, wxFontEncoding output_enc,
int method = wxCONVERT_STRICT);
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