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Load catalogs for all preferred languages, if they exist

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This way the first and only fallback language isn't necessarily the
msgid language (which is English most often). This is how GNU gettext
works -- it uses multiple fallback languages when multiple preferred
languages are set.

As a side effect, fixes #18227 in one possible way.
This commit is contained in:
Lauri Nurmi 2018-10-02 19:49:50 +03:00 committed by Vadim Zeitlin
parent 5d08e404c7
commit 2d784da2ee
2 changed files with 34 additions and 12 deletions
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15
interface/wx/translation.h
View File

@ -190,9 +190,10 @@ public:
bool AddStdCatalog();
/**
Add a catalog for use with the current locale.
Add a catalog for the preferred UI language. In case of multiple
preferences, add catalog for each language, if available.
By default, it is searched for in standard places (see
By default, the catalog is searched for in standard places (see
wxFileTranslationsLoader), but you may also prepend additional
directories to the search path with
wxFileTranslationsLoader::AddCatalogLookupPathPrefix().
@ -216,8 +217,9 @@ public:
code are used instead.
@return
@true if catalog was successfully loaded, @false otherwise (which might
mean that the catalog is not found or that it isn't in the correct format).
@true if catalog in the most preferred language was successfully loaded,
@false otherwise (which might mean that the catalog is not found or that
it isn't in the correct format).
*/
bool AddCatalog(const wxString& domain,
wxLanguage msgIdLanguage = wxLANGUAGE_ENGLISH_US);
@ -243,8 +245,9 @@ public:
in case they use 8-bit characters (e.g. German or French strings).
@return
@true if catalog was successfully loaded, @false otherwise (which might
mean that the catalog is not found or that it isn't in the correct format).
@true if catalog in the most preferred language was successfully loaded,
@false otherwise (which might mean that the catalog is not found or that
it isn't in the correct format).
*/
bool AddCatalog(const wxString& domain,
wxLanguage msgIdLanguage,

31
src/common/translation.cpp
View File

@ -1555,9 +1555,9 @@ bool wxTranslations::AddCatalog(const wxString& domain,
wxLanguage msgIdLanguage)
{
const wxString msgIdLang = wxLocale::GetLanguageCanonicalName(msgIdLanguage);
const wxString domain_lang = GetBestTranslation(domain, msgIdLang);
const wxArrayString domain_langs = GetAllGoodTranslations(domain, msgIdLanguage);
if ( domain_lang.empty() )
if ( domain_langs.empty() )
{
wxLogTrace(TRACE_I18N,
wxS("no suitable translation for domain '%s' found"),
@ -1565,11 +1565,30 @@ bool wxTranslations::AddCatalog(const wxString& domain,
return false;
}
wxLogTrace(TRACE_I18N,
wxS("adding '%s' translation for domain '%s' (msgid language '%s')"),
domain_lang, domain, msgIdLang);
bool success = false;
for ( wxArrayString::const_iterator lang = domain_langs.begin();
lang != domain_langs.end();
++lang )
{
wxLogTrace(TRACE_I18N,
wxS("adding '%s' translation for domain '%s' (msgid language '%s')"),
*lang, domain, msgIdLang);
return LoadCatalog(domain, domain_lang, msgIdLang);
// No use loading languages that are less preferred than the
// msgid language, as by definition it contains all the strings
// in the msgid language.
if ( msgIdLang == *lang )
break;
// We determine success by the success of loading/failing to load
// the most preferred (i.e. the first one) language's catalog:
if ( lang == domain_langs.begin() )
success = LoadCatalog(domain, *lang, msgIdLang);
else
LoadCatalog(domain, *lang, msgIdLang);
}
return success;
}