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//go:build android
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// +build android
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package locale
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/*
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#cgo LDFLAGS: -landroid -llog
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#include <stdlib.h>
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const char *getLocales(uintptr_t java_vm, uintptr_t jni_env, uintptr_t ctx);
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const char *getLocale(uintptr_t java_vm, uintptr_t jni_env, uintptr_t ctx);
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const char *getLanguage(uintptr_t java_vm, uintptr_t jni_env, uintptr_t ctx);
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const char *getRegion(uintptr_t java_vm, uintptr_t jni_env, uintptr_t ctx);
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*/
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import "C"
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import (
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"errors"
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"strings"
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"unsafe"
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)
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var (
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errRunOnJVMNotSet error = errors.New("you first need to call SetRunOnJVM")
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runOnJVM func(fn func(vm, env, ctx uintptr) error) error
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)
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// SetRunOnJVM sets the RunOnJVM function that will be called by this library.
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// This can either be "golang.org/x/mobile/app".RunOnJVM or "github.com/fyne-io/mobile/app".RunOnJVM,
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// depending on the mobile framework you're using (both can't be imported at the same time).
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//
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// RunOnJVM runs fn on a new goroutine locked to an OS thread with a JNIEnv.
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//
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// RunOnJVM blocks until the call to fn is complete. Any Java
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// exception or failure to attach to the JVM is returned as an error.
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//
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// The function fn takes vm, the current JavaVM*,
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// env, the current JNIEnv*, and
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// ctx, a jobject representing the global android.context.Context.
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func SetRunOnJVM(fn func(fn func(vm, env, ctx uintptr) error) error) {
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runOnJVM = fn
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}
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// GetLocale retrieves the IETF BCP 47 language tag set on the system.
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func GetLocale() (string, error) {
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if runOnJVM == nil {
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return "", errRunOnJVMNotSet
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}
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locale := ""
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err := runOnJVM(func(vm, env, ctx uintptr) error {
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chars := C.getLocale(C.uintptr_t(vm), C.uintptr_t(env), C.uintptr_t(ctx))
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locale = C.GoString(chars)
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C.free(unsafe.Pointer(chars))
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return nil
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})
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return locale, err
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}
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// GetLocales retrieves the IETF BCP 47 language tags set on the system.
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func GetLocales() ([]string, error) {
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if runOnJVM == nil {
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return nil, errRunOnJVMNotSet
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}
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locales := ""
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err := runOnJVM(func(vm, env, ctx uintptr) error {
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chars := C.getLocales(C.uintptr_t(vm), C.uintptr_t(env), C.uintptr_t(ctx))
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locales = C.GoString(chars)
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C.free(unsafe.Pointer(chars))
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return nil
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})
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return strings.Split(locales, ","), err
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}
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// GetLanguage retrieves the IETF BCP 47 language tag set on the system and
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// returns the language part of the tag.
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func GetLanguage() (string, error) {
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if runOnJVM == nil {
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return "", errRunOnJVMNotSet
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}
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language := ""
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err := runOnJVM(func(vm, env, ctx uintptr) error {
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chars := C.getLanguage(C.uintptr_t(vm), C.uintptr_t(env), C.uintptr_t(ctx))
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language = C.GoString(chars)
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C.free(unsafe.Pointer(chars))
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return nil
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})
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return language, err
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}
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// GetRegion retrieves the IETF BCP 47 language tag set on the system and
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// returns the region part of the tag.
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func GetRegion() (string, error) {
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if runOnJVM == nil {
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return "", errRunOnJVMNotSet
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}
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region := ""
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err := runOnJVM(func(vm, env, ctx uintptr) error {
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chars := C.getRegion(C.uintptr_t(vm), C.uintptr_t(env), C.uintptr_t(ctx))
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region = C.GoString(chars)
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C.free(unsafe.Pointer(chars))
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return nil
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})
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return region, err
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}
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