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Override GetPreferredUILanguages with WXLANGUAGE

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Add support for overriding GetPreferredUILanguages() return value by
setting the WXLANGUAGE environment variable to a colon-separated list
of desired languages (same as GNU's LANGUAGE variable).

Primarily used for unit tests, but may be more generally useful.
This commit is contained in:
Václav Slavík 2024-02-13 13:38:37 +01:00
parent f248f0593c
commit 1f658ff729
2 changed files with 35 additions and 1 deletions
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6
docs/doxygen/overviews/envvars.h
View file

@ -51,6 +51,12 @@ wxWidgets programs.
default value if it's not a number, so that e.g. setting it to "yes" default value if it's not a number, so that e.g. setting it to "yes"
suppresses all GTK diagnostics while setting it to 16 only suppresses suppresses all GTK diagnostics while setting it to 16 only suppresses
GTK warning messages.} GTK warning messages.}
@itemdef{WXLANGUAGE,
This variable can be set to override OS setting of preferred languages
and make wxUILocale::GetPreferredUILanguages() return the set list
instead. The format is same as GNU's <a
href="https://www.gnu.org/software/gettext/manual/html_node/The-LANGUAGE-variable.html">LANGUAGE</a>
variable: a colon-separated list of language codes.}
*/ */
@see wxSystemOptions @see wxSystemOptions

30
src/common/uilocale.cpp
View file

@ -24,6 +24,9 @@
#include "wx/arrstr.h" #include "wx/arrstr.h"
#include "wx/intl.h" #include "wx/intl.h"
#include "wx/log.h"
#include "wx/tokenzr.h"
#include "wx/utils.h"
#ifndef __WINDOWS__ #ifndef __WINDOWS__
#include "wx/language.h" #include "wx/language.h"
@ -31,6 +34,8 @@
#include "wx/private/uilocale.h" #include "wx/private/uilocale.h"
#define TRACE_I18N wxS("i18n")
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
// helper functions // helper functions
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
@ -678,7 +683,7 @@ int wxUILocale::GetSystemLanguage()
{ {
const wxLanguageInfos& languagesDB = wxGetLanguageInfos(); const wxLanguageInfos& languagesDB = wxGetLanguageInfos();
size_t count = languagesDB.size(); size_t count = languagesDB.size();
wxVector<wxString> preferred = wxUILocaleImpl::GetPreferredUILanguages(); wxVector<wxString> preferred = wxUILocale::GetPreferredUILanguages();
for (wxVector<wxString>::const_iterator j = preferred.begin(); for (wxVector<wxString>::const_iterator j = preferred.begin();
j != preferred.end(); j != preferred.end();
@ -743,6 +748,29 @@ int wxUILocale::GetSystemLocale()
/* static */ /* static */
wxVector<wxString> wxUILocale::GetPreferredUILanguages() wxVector<wxString> wxUILocale::GetPreferredUILanguages()
{ {
// The WXLANGUAGE variable may contain a colon separated list of language
// codes in the order of preference. It is modelled after GNU's LANGUAGE:
// http://www.gnu.org/software/gettext/manual/html_node/The-LANGUAGE-variable.html
wxString languageFromEnv;
if (wxGetEnv("WXLANGUAGE", &languageFromEnv) && !languageFromEnv.empty())
{
wxVector<wxString> preferred;
wxStringTokenizer tknzr(languageFromEnv, ":");
while (tknzr.HasMoreTokens())
{
const wxString tok = tknzr.GetNextToken();
if (const wxLanguageInfo* li = wxUILocale::FindLanguageInfo(tok))
{
preferred.push_back(li->CanonicalName);
}
}
if (!preferred.empty())
{
wxLogTrace(TRACE_I18N, " - using languages override from WXLANGUAGE: '%s'", languageFromEnv);
return preferred;
}
}
return wxUILocaleImpl::GetPreferredUILanguages(); return wxUILocaleImpl::GetPreferredUILanguages();
} }