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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"
suppresses all GTK diagnostics while setting it to 16 only suppresses
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

30
src/common/uilocale.cpp
View file

@ -24,6 +24,9 @@
#include "wx/arrstr.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/tokenzr.h"
#include "wx/utils.h"
#ifndef __WINDOWS__
#include "wx/language.h"
@ -31,6 +34,8 @@
#include "wx/private/uilocale.h"
#define TRACE_I18N wxS("i18n")
// ----------------------------------------------------------------------------
// helper functions
// ----------------------------------------------------------------------------
@ -678,7 +683,7 @@ int wxUILocale::GetSystemLanguage()
{
const wxLanguageInfos& languagesDB = wxGetLanguageInfos();
size_t count = languagesDB.size();
wxVector<wxString> preferred = wxUILocaleImpl::GetPreferredUILanguages();
wxVector<wxString> preferred = wxUILocale::GetPreferredUILanguages();
for (wxVector<wxString>::const_iterator j = preferred.begin();
j != preferred.end();
@ -743,6 +748,29 @@ int wxUILocale::GetSystemLocale()
/* static */
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();
}