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Diffstat (limited to 'widget/android/jni/Accessors.h')
| -rw-r--r-- | widget/android/jni/Accessors.h | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/widget/android/jni/Accessors.h b/widget/android/jni/Accessors.h deleted file mode 100644 index fe2cbc9d4..000000000 --- a/widget/android/jni/Accessors.h +++ /dev/null @@ -1,274 +0,0 @@ -#ifndef mozilla_jni_Accessors_h__ -#define mozilla_jni_Accessors_h__ - -#include <jni.h> - -#include "mozilla/jni/Refs.h" -#include "mozilla/jni/Types.h" -#include "mozilla/jni/Utils.h" -#include "AndroidBridge.h" - -namespace mozilla { -namespace jni { - -namespace detail { - -// Helper class to convert an arbitrary type to a jvalue, e.g. Value(123).val. -struct Value -{ - Value(jboolean z) { val.z = z; } - Value(jbyte b) { val.b = b; } - Value(jchar c) { val.c = c; } - Value(jshort s) { val.s = s; } - Value(jint i) { val.i = i; } - Value(jlong j) { val.j = j; } - Value(jfloat f) { val.f = f; } - Value(jdouble d) { val.d = d; } - Value(jobject l) { val.l = l; } - - jvalue val; -}; - -} // namespace detail - -using namespace detail; - -// Base class for Method<>, Field<>, and Constructor<>. -class Accessor -{ - static void GetNsresult(JNIEnv* env, nsresult* rv) - { - if (env->ExceptionCheck()) { -#ifdef MOZ_CHECK_JNI - env->ExceptionDescribe(); -#endif - env->ExceptionClear(); - *rv = NS_ERROR_FAILURE; - } else { - *rv = NS_OK; - } - } - -protected: - // Called after making a JNIEnv call. - template<class Traits> - static void EndAccess(const typename Traits::Owner::Context& ctx, - nsresult* rv) - { - if (Traits::exceptionMode == ExceptionMode::ABORT) { - MOZ_CATCH_JNI_EXCEPTION(ctx.Env()); - - } else if (Traits::exceptionMode == ExceptionMode::NSRESULT) { - GetNsresult(ctx.Env(), rv); - } - } -}; - - -// Member<> is used to call a JNI method given a traits class. -template<class Traits, typename ReturnType = typename Traits::ReturnType> -class Method : public Accessor -{ - typedef Accessor Base; - typedef typename Traits::Owner::Context Context; - -protected: - static jmethodID sID; - - static void BeginAccess(const Context& ctx) - { - MOZ_ASSERT_JNI_THREAD(Traits::callingThread); - static_assert(Traits::dispatchTarget == DispatchTarget::CURRENT, - "Dispatching not supported for method call"); - - if (sID) { - return; - } - - if (Traits::isStatic) { - MOZ_ALWAYS_TRUE(sID = AndroidBridge::GetStaticMethodID( - ctx.Env(), ctx.ClassRef(), Traits::name, Traits::signature)); - } else { - MOZ_ALWAYS_TRUE(sID = AndroidBridge::GetMethodID( - ctx.Env(), ctx.ClassRef(), Traits::name, Traits::signature)); - } - } - - static void EndAccess(const Context& ctx, nsresult* rv) - { - return Base::EndAccess<Traits>(ctx, rv); - } - -public: - template<typename... Args> - static ReturnType Call(const Context& ctx, nsresult* rv, const Args&... args) - { - JNIEnv* const env = ctx.Env(); - BeginAccess(ctx); - - jvalue jargs[] = { - Value(TypeAdapter<Args>::FromNative(env, args)).val ... - }; - - auto result = TypeAdapter<ReturnType>::ToNative(env, - Traits::isStatic ? - (env->*TypeAdapter<ReturnType>::StaticCall)( - ctx.RawClassRef(), sID, jargs) : - (env->*TypeAdapter<ReturnType>::Call)( - ctx.Get(), sID, jargs)); - - EndAccess(ctx, rv); - return result; - } -}; - -// Define sID member. -template<class T, typename R> jmethodID Method<T, R>::sID; - - -// Specialize void because C++ forbids us from -// using a "void" temporary result variable. -template<class Traits> -class Method<Traits, void> : public Method<Traits, bool> -{ - typedef Method<Traits, bool> Base; - typedef typename Traits::Owner::Context Context; - -public: - template<typename... Args> - static void Call(const Context& ctx, nsresult* rv, - const Args&... args) - { - JNIEnv* const env = ctx.Env(); - Base::BeginAccess(ctx); - - jvalue jargs[] = { - Value(TypeAdapter<Args>::FromNative(env, args)).val ... - }; - - if (Traits::isStatic) { - env->CallStaticVoidMethodA(ctx.RawClassRef(), Base::sID, jargs); - } else { - env->CallVoidMethodA(ctx.Get(), Base::sID, jargs); - } - - Base::EndAccess(ctx, rv); - } -}; - - -// Constructor<> is used to construct a JNI instance given a traits class. -template<class Traits> -class Constructor : protected Method<Traits, typename Traits::ReturnType> { - typedef typename Traits::Owner::Context Context; - typedef typename Traits::ReturnType ReturnType; - typedef Method<Traits, ReturnType> Base; - -public: - template<typename... Args> - static ReturnType Call(const Context& ctx, nsresult* rv, - const Args&... args) - { - JNIEnv* const env = ctx.Env(); - Base::BeginAccess(ctx); - - jvalue jargs[] = { - Value(TypeAdapter<Args>::FromNative(env, args)).val ... - }; - - auto result = TypeAdapter<ReturnType>::ToNative( - env, env->NewObjectA(ctx.RawClassRef(), Base::sID, jargs)); - - Base::EndAccess(ctx, rv); - return result; - } -}; - - -// Field<> is used to access a JNI field given a traits class. -template<class Traits> -class Field : public Accessor -{ - typedef Accessor Base; - typedef typename Traits::Owner::Context Context; - typedef typename Traits::ReturnType GetterType; - typedef typename Traits::SetterType SetterType; - -private: - - static jfieldID sID; - - static void BeginAccess(const Context& ctx) - { - MOZ_ASSERT_JNI_THREAD(Traits::callingThread); - static_assert(Traits::dispatchTarget == DispatchTarget::CURRENT, - "Dispatching not supported for field access"); - - if (sID) { - return; - } - - if (Traits::isStatic) { - MOZ_ALWAYS_TRUE(sID = AndroidBridge::GetStaticFieldID( - ctx.Env(), ctx.ClassRef(), Traits::name, Traits::signature)); - } else { - MOZ_ALWAYS_TRUE(sID = AndroidBridge::GetFieldID( - ctx.Env(), ctx.ClassRef(), Traits::name, Traits::signature)); - } - } - - static void EndAccess(const Context& ctx, nsresult* rv) - { - return Base::EndAccess<Traits>(ctx, rv); - } - -public: - static GetterType Get(const Context& ctx, nsresult* rv) - { - JNIEnv* const env = ctx.Env(); - BeginAccess(ctx); - - auto result = TypeAdapter<GetterType>::ToNative( - env, Traits::isStatic ? - - (env->*TypeAdapter<GetterType>::StaticGet) - (ctx.RawClassRef(), sID) : - - (env->*TypeAdapter<GetterType>::Get) - (ctx.Get(), sID)); - - EndAccess(ctx, rv); - return result; - } - - static void Set(const Context& ctx, nsresult* rv, SetterType val) - { - JNIEnv* const env = ctx.Env(); - BeginAccess(ctx); - - if (Traits::isStatic) { - (env->*TypeAdapter<SetterType>::StaticSet)( - ctx.RawClassRef(), sID, - TypeAdapter<SetterType>::FromNative(env, val)); - } else { - (env->*TypeAdapter<SetterType>::Set)( - ctx.Get(), sID, - TypeAdapter<SetterType>::FromNative(env, val)); - } - - EndAccess(ctx, rv); - } -}; - -// Define sID member. -template<class T> jfieldID Field<T>::sID; - - -// Define the sClassRef member declared in Refs.h and -// used by Method and Field above. -template<class C, typename T> jclass Context<C, T>::sClassRef; - -} // namespace jni -} // namespace mozilla - -#endif // mozilla_jni_Accessors_h__ |