mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
614 lines
20 KiB
C++
614 lines
20 KiB
C++
/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "NativeJSContainer.h"
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#include "AndroidBridge.h"
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#include "mozilla/Vector.h"
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#include "prthread.h"
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using namespace mozilla;
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using namespace mozilla::widget;
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namespace mozilla {
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namespace widget {
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class NativeJSContainer
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{
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public:
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static void InitJNI(JNIEnv* env) {
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if (jNativeJSContainer) {
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return;
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}
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jNativeJSContainer = AndroidBridge::GetClassGlobalRef(
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env, "org/mozilla/gecko/util/NativeJSContainer");
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MOZ_ASSERT(jNativeJSContainer);
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jContainerNativeObject = AndroidBridge::GetFieldID(
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env, jNativeJSContainer, "mNativeObject", "J");
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MOZ_ASSERT(jContainerNativeObject);
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jContainerConstructor = AndroidBridge::GetMethodID(
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env, jNativeJSContainer, "<init>", "(J)V");
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MOZ_ASSERT(jContainerConstructor);
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jNativeJSObject = AndroidBridge::GetClassGlobalRef(
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env, "org/mozilla/gecko/util/NativeJSObject");
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MOZ_ASSERT(jNativeJSObject);
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jObjectContainer = AndroidBridge::GetFieldID(
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env, jNativeJSObject, "mContainer",
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"Lorg/mozilla/gecko/util/NativeJSContainer;");
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MOZ_ASSERT(jObjectContainer);
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jObjectIndex = AndroidBridge::GetFieldID(
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env, jNativeJSObject, "mObjectIndex", "I");
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MOZ_ASSERT(jObjectIndex);
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jObjectConstructor = AndroidBridge::GetMethodID(
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env, jNativeJSObject, "<init>",
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"(Lorg/mozilla/gecko/util/NativeJSContainer;I)V");
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MOZ_ASSERT(jContainerConstructor);
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}
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static jobject CreateInstance(JNIEnv* env, JSContext* cx,
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JS::HandleObject object) {
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return CreateInstance(env, new NativeJSContainer(cx, object));
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}
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static NativeJSContainer* FromInstance(JNIEnv* env, jobject instance) {
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MOZ_ASSERT(instance);
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const jlong fieldValue =
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env->GetLongField(instance, jContainerNativeObject);
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NativeJSContainer* const nativeObject =
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reinterpret_cast<NativeJSContainer* const>(
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static_cast<uintptr_t>(fieldValue));
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if (!nativeObject) {
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AndroidBridge::ThrowException(env,
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"java/lang/NullPointerException",
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"Uninitialized NativeJSContainer");
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}
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return nativeObject;
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}
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static void DisposeInstance(JNIEnv* env, jobject instance) {
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NativeJSContainer* const container = FromInstance(env, instance);
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if (container) {
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env->SetLongField(instance, jContainerNativeObject,
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static_cast<jlong>(reinterpret_cast<uintptr_t>(nullptr)));
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delete container;
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}
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}
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static jobject CloneInstance(JNIEnv* env, jobject instance) {
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NativeJSContainer* const container = FromInstance(env, instance);
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if (!container || !container->EnsureObject(env)) {
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return nullptr;
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}
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JSContext* const cx = container->mThreadContext;
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JS::RootedObject object(cx, container->mJSObject);
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MOZ_ASSERT(object);
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JSAutoStructuredCloneBuffer buffer;
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if (!buffer.write(cx, JS::RootedValue(cx, JS::ObjectValue(*object)))) {
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AndroidBridge::ThrowException(env,
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"java/lang/UnsupportedOperationException",
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"Cannot serialize object");
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return nullptr;
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}
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return CreateInstance(env, new NativeJSContainer(cx, Move(buffer)));
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}
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static jobject GetInstanceFromObject(JNIEnv* env, jobject object) {
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MOZ_ASSERT(object);
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const jobject instance = env->GetObjectField(object, jObjectContainer);
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MOZ_ASSERT(instance);
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return instance;
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}
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static JSContext* GetContextFromObject(JNIEnv* env, jobject object) {
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MOZ_ASSERT(object);
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AutoLocalJNIFrame frame(env, 1);
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NativeJSContainer* const container =
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FromInstance(env, GetInstanceFromObject(env, object));
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if (!container) {
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return nullptr;
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}
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return container->mThreadContext;
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}
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static JSObject* GetObjectFromObject(JNIEnv* env, jobject object) {
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MOZ_ASSERT(object);
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AutoLocalJNIFrame frame(env, 1);
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NativeJSContainer* const container =
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FromInstance(env, GetInstanceFromObject(env, object));
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if (!container ||
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!container->EnsureObject(env)) { // Do thread check
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return nullptr;
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}
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const jint index = env->GetIntField(object, jObjectIndex);
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if (index < 0) {
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// -1 for index field means it's the root object of the container
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return container->mJSObject;
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}
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return container->mRootedObjects[index];
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}
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static jobject CreateObjectInstance(JNIEnv* env, jobject object,
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JSContext* cx,
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JS::HandleObject jsObject) {
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MOZ_ASSERT(object);
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MOZ_ASSERT(jsObject);
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AutoLocalJNIFrame frame(env, 2);
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jobject instance = GetInstanceFromObject(env, object);
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NativeJSContainer* const container = FromInstance(env, instance);
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if (!container) {
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return nullptr;
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}
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size_t newIndex = container->mRootedObjects.length();
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if (!container->mRootedObjects.append(jsObject)) {
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AndroidBridge::ThrowException(env,
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"java/lang/OutOfMemoryError", "Cannot allocate object");
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return nullptr;
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}
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const jobject newObject =
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env->NewObject(jNativeJSObject, jObjectConstructor,
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instance, newIndex);
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AndroidBridge::HandleUncaughtException(env);
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MOZ_ASSERT(newObject);
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return frame.Pop(newObject);
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}
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// Make sure we have a JSObject and deserialize if necessary/possible
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bool EnsureObject(JNIEnv* env) {
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if (mJSObject) {
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if (PR_GetCurrentThread() != mThread) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalThreadStateException",
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"Using NativeJSObject off its thread");
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return false;
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}
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return true;
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}
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if (!SwitchContextToCurrentThread()) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalThreadStateException",
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"Not available for this thread");
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return false;
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}
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JS::RootedValue value(mThreadContext);
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MOZ_ASSERT(mBuffer.data());
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MOZ_ALWAYS_TRUE(mBuffer.read(mThreadContext, &value));
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if (value.isObject()) {
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mJSObject = &value.toObject();
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}
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if (!mJSObject) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalStateException", "Cannot deserialize data");
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return false;
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}
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mBuffer.clear();
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return true;
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}
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private:
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static jclass jNativeJSContainer;
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static jfieldID jContainerNativeObject;
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static jmethodID jContainerConstructor;
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static jclass jNativeJSObject;
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static jfieldID jObjectContainer;
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static jfieldID jObjectIndex;
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static jmethodID jObjectConstructor;
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static jobject CreateInstance(JNIEnv* env,
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NativeJSContainer* nativeObject) {
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InitJNI(env);
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const jobject newObject =
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env->NewObject(jNativeJSContainer, jContainerConstructor,
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static_cast<jlong>(
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reinterpret_cast<uintptr_t>(nativeObject)));
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AndroidBridge::HandleUncaughtException(env);
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MOZ_ASSERT(newObject);
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return newObject;
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}
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// Thread that the object is valid on
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PRThread* mThread;
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// Context that the object is valid in
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JSContext* mThreadContext;
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// Deserialized object, or nullptr if object is in serialized form
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JS::Heap<JSObject*> mJSObject;
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// Serialized object, or empty if object is in deserialized form
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JSAutoStructuredCloneBuffer mBuffer;
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// Objects derived from mJSObject
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Vector<JS::Heap<JSObject*>, 4> mRootedObjects;
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// Create a new container containing the given deserialized object
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NativeJSContainer(JSContext* cx, JS::HandleObject object)
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: mThread(PR_GetCurrentThread())
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, mThreadContext(cx)
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, mJSObject(object)
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{
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}
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// Create a new container containing the given serialized object
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NativeJSContainer(JSContext* cx, JSAutoStructuredCloneBuffer&& buffer)
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: mThread(PR_GetCurrentThread())
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, mThreadContext(cx)
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, mBuffer(Forward<JSAutoStructuredCloneBuffer>(buffer))
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{
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}
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bool SwitchContextToCurrentThread() {
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PRThread* const currentThread = PR_GetCurrentThread();
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if (currentThread == mThread) {
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return true;
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}
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return false;
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}
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};
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jclass NativeJSContainer::jNativeJSContainer = 0;
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jfieldID NativeJSContainer::jContainerNativeObject = 0;
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jmethodID NativeJSContainer::jContainerConstructor = 0;
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jclass NativeJSContainer::jNativeJSObject = 0;
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jfieldID NativeJSContainer::jObjectContainer = 0;
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jfieldID NativeJSContainer::jObjectIndex = 0;
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jmethodID NativeJSContainer::jObjectConstructor = 0;
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jobject
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CreateNativeJSContainer(JNIEnv* env, JSContext* cx, JS::HandleObject object)
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{
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return NativeJSContainer::CreateInstance(env, cx, object);
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}
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} // namespace widget
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} // namespace mozilla
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namespace {
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class JSJNIString
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{
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public:
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JSJNIString(JNIEnv* env, jstring str)
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: mEnv(env)
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, mJNIString(str)
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, mJSString(!str ? nullptr :
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reinterpret_cast<const jschar*>(env->GetStringChars(str, nullptr)))
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{
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}
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~JSJNIString() {
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if (mJNIString) {
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mEnv->ReleaseStringChars(mJNIString,
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reinterpret_cast<const jchar*>(mJSString));
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}
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}
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operator const jschar*() const {
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return mJSString;
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}
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size_t Length() const {
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return static_cast<size_t>(mEnv->GetStringLength(mJNIString));
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}
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private:
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JNIEnv* const mEnv;
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const jstring mJNIString;
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const jschar* const mJSString;
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};
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bool
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CheckJSCall(JNIEnv* env, bool result) {
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if (!result) {
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AndroidBridge::ThrowException(env,
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"java/lang/UnsupportedOperationException", "JSAPI call failed");
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}
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return result;
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}
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bool
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CheckJNIArgument(JNIEnv* env, jobject arg) {
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if (!arg) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalArgumentException", "Null argument");
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return false;
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}
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return true;
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}
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bool
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AppendJSON(const jschar* buf, uint32_t len, void* data)
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{
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static_cast<nsAutoString*>(data)->Append(buf, len);
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return true;
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}
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template <typename U, typename V,
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bool (JS::Value::*IsMethod)() const,
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V (JS::Value::*ToMethod)() const>
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struct PrimitiveProperty
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{
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typedef U Type; // JNI type
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typedef V NativeType; // JSAPI type
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static bool InValue(JS::HandleValue val) {
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return (static_cast<const JS::Value&>(val).*IsMethod)();
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}
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static Type FromValue(JNIEnv* env, jobject instance,
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JSContext* cx, JS::HandleValue val) {
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return static_cast<Type>(
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(static_cast<const JS::Value&>(val).*ToMethod)());
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}
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};
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// Statically cast from bool to jboolean (unsigned char); it works
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// since false and JNI_FALSE have the same value (0), and true and
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// JNI_TRUE have the same value (1).
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typedef PrimitiveProperty<jboolean, bool,
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&JS::Value::isBoolean, &JS::Value::toBoolean> BooleanProperty;
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typedef PrimitiveProperty<jdouble, double,
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&JS::Value::isNumber, &JS::Value::toNumber> DoubleProperty;
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typedef PrimitiveProperty<jint, int32_t,
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&JS::Value::isInt32, &JS::Value::toInt32> IntProperty;
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struct StringProperty
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{
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typedef jstring Type;
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static bool InValue(JS::HandleValue val) {
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return val.isString();
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}
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static Type FromValue(JNIEnv* env, jobject instance,
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JSContext* cx, JS::HandleValue val) {
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JS::RootedString str(cx, val.toString());
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size_t strLen = 0;
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const jschar* const strChars =
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JS_GetStringCharsAndLength(cx, str, &strLen);
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if (!CheckJSCall(env, !!strChars)) {
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return nullptr;
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}
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jstring ret = env->NewString(
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reinterpret_cast<const jchar*>(strChars), strLen);
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AndroidBridge::HandleUncaughtException(env);
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MOZ_ASSERT(ret);
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return ret;
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}
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};
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template <jobject (*FactoryMethod)
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(JNIEnv*, jobject, JSContext*, JS::HandleObject)>
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struct BaseObjectProperty
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{
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typedef jobject Type;
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static bool InValue(JS::HandleValue val) {
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return val.isObjectOrNull();
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}
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static Type FromValue(JNIEnv* env, jobject instance,
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JSContext* cx, JS::HandleValue val) {
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if (val.isNull()) {
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return nullptr;
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}
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JS::RootedObject object(cx, &val.toObject());
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return FactoryMethod(env, instance, cx, object);
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}
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};
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jobject GetBundle(JNIEnv*, jobject, JSContext*, JS::HandleObject);
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// Returns a NativeJSObject from a JSObject
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typedef BaseObjectProperty<
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NativeJSContainer::CreateObjectInstance> ObjectProperty;
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// Returns a Bundle from a JSObject
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typedef BaseObjectProperty<GetBundle> BundleProperty;
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struct HasProperty
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{
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typedef jboolean Type;
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static bool InValue(JS::HandleValue val) {
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return true;
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}
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static Type FromValue(JNIEnv* env, jobject instance,
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JSContext* cx, JS::HandleValue val) {
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return JNI_TRUE;
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}
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};
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MOZ_BEGIN_ENUM_CLASS(FallbackOption)
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THROW,
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RETURN,
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MOZ_END_ENUM_CLASS(FallbackOption)
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template <class Property>
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typename Property::Type
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GetProperty(JNIEnv* env, jobject instance, jstring name,
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FallbackOption option = FallbackOption::THROW,
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typename Property::Type fallback = typename Property::Type()) {
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MOZ_ASSERT(env);
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MOZ_ASSERT(instance);
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JSContext* const cx =
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NativeJSContainer::GetContextFromObject(env, instance);
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const JS::RootedObject object(cx,
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NativeJSContainer::GetObjectFromObject(env, instance));
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const JSJNIString strName(env, name);
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JS::RootedValue val(cx);
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if (!object ||
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!CheckJNIArgument(env, name) ||
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!CheckJSCall(env,
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JS_GetUCProperty(cx, object, strName, strName.Length(), &val))) {
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return typename Property::Type();
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}
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if (val.isUndefined()) {
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if (option == FallbackOption::THROW) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalArgumentException",
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"Property does not exist");
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}
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return fallback;
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}
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if (!Property::InValue(val)) {
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AndroidBridge::ThrowException(env,
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"java/lang/IllegalArgumentException",
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"Property type mismatch");
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return fallback;
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}
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return Property::FromValue(env, instance, cx, val);
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}
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jobject
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GetBundle(JNIEnv* env, jobject instance, JSContext* cx, JS::HandleObject obj)
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{
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// TODO: add implementation
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return nullptr;
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}
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} // namespace
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extern "C" {
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NS_EXPORT void JNICALL
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Java_org_mozilla_gecko_util_NativeJSContainer_dispose(JNIEnv* env, jobject instance)
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{
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MOZ_ASSERT(env);
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NativeJSContainer::DisposeInstance(env, instance);
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}
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NS_EXPORT jobject JNICALL
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Java_org_mozilla_gecko_util_NativeJSContainer_clone(JNIEnv* env, jobject instance)
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{
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MOZ_ASSERT(env);
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return NativeJSContainer::CloneInstance(env, instance);
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}
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NS_EXPORT jboolean JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_getBoolean(JNIEnv* env, jobject instance, jstring name)
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{
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return GetProperty<BooleanProperty>(env, instance, name);
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}
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NS_EXPORT jboolean JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_optBoolean(JNIEnv* env, jobject instance,
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jstring name, jboolean fallback)
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{
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return GetProperty<BooleanProperty>(env, instance, name, FallbackOption::RETURN, fallback);
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}
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NS_EXPORT jobject JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_getBundle(JNIEnv* env, jobject instance, jstring name)
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{
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return GetProperty<BundleProperty>(env, instance, name);
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}
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NS_EXPORT jobject JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_optBundle(JNIEnv* env, jobject instance,
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jstring name, jobject fallback)
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{
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return GetProperty<BundleProperty>(env, instance, name, FallbackOption::RETURN, fallback);
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}
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NS_EXPORT jdouble JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_getDouble(JNIEnv* env, jobject instance, jstring name)
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{
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return GetProperty<DoubleProperty>(env, instance, name);
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}
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NS_EXPORT jdouble JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_optDouble(JNIEnv* env, jobject instance,
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jstring name, jdouble fallback)
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{
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return GetProperty<DoubleProperty>(env, instance, name, FallbackOption::RETURN, fallback);
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}
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NS_EXPORT jint JNICALL
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Java_org_mozilla_gecko_util_NativeJSObject_getInt(JNIEnv* env, jobject instance, jstring name)
|
|
{
|
|
return GetProperty<IntProperty>(env, instance, name);
|
|
}
|
|
|
|
NS_EXPORT jint JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_optInt(JNIEnv* env, jobject instance,
|
|
jstring name, jint fallback)
|
|
{
|
|
return GetProperty<IntProperty>(env, instance, name, FallbackOption::RETURN, fallback);
|
|
}
|
|
|
|
NS_EXPORT jobject JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_getObject(JNIEnv* env, jobject instance, jstring name)
|
|
{
|
|
return GetProperty<ObjectProperty>(env, instance, name);
|
|
}
|
|
|
|
NS_EXPORT jobject JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_optObject(JNIEnv* env, jobject instance,
|
|
jstring name, jobject fallback)
|
|
{
|
|
return GetProperty<ObjectProperty>(env, instance, name, FallbackOption::RETURN, fallback);
|
|
}
|
|
|
|
NS_EXPORT jstring JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_getString(JNIEnv* env, jobject instance, jstring name)
|
|
{
|
|
return GetProperty<StringProperty>(env, instance, name);
|
|
}
|
|
|
|
NS_EXPORT jstring JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_optString(JNIEnv* env, jobject instance,
|
|
jstring name, jstring fallback)
|
|
{
|
|
return GetProperty<StringProperty>(env, instance, name, FallbackOption::RETURN, fallback);
|
|
}
|
|
|
|
NS_EXPORT jboolean JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_has(JNIEnv* env, jobject instance, jstring name)
|
|
{
|
|
return GetProperty<HasProperty>(env, instance, name, FallbackOption::RETURN, JNI_FALSE);
|
|
}
|
|
|
|
NS_EXPORT jobject JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_toBundle(JNIEnv* env, jobject instance)
|
|
{
|
|
MOZ_ASSERT(env);
|
|
MOZ_ASSERT(instance);
|
|
|
|
JSContext* const cx = NativeJSContainer::GetContextFromObject(env, instance);
|
|
const JS::RootedObject object(cx, NativeJSContainer::GetObjectFromObject(env, instance));
|
|
if (!object) {
|
|
return nullptr;
|
|
}
|
|
return GetBundle(env, instance, cx, object);
|
|
}
|
|
|
|
NS_EXPORT jstring JNICALL
|
|
Java_org_mozilla_gecko_util_NativeJSObject_toString(JNIEnv* env, jobject instance)
|
|
{
|
|
MOZ_ASSERT(env);
|
|
MOZ_ASSERT(instance);
|
|
|
|
JSContext* const cx = NativeJSContainer::GetContextFromObject(env, instance);
|
|
const JS::RootedObject object(cx, NativeJSContainer::GetObjectFromObject(env, instance));
|
|
JS::RootedValue value(cx, JS::ObjectValue(*object));
|
|
nsAutoString json;
|
|
|
|
if (!object ||
|
|
!CheckJSCall(env,
|
|
JS_Stringify(cx, &value, JS::NullPtr(), JS::NullHandleValue, AppendJSON, &json))) {
|
|
return nullptr;
|
|
}
|
|
jstring ret = env->NewString(reinterpret_cast<const jchar*>(json.get()), json.Length());
|
|
AndroidBridge::HandleUncaughtException(env);
|
|
MOZ_ASSERT(ret);
|
|
return ret;
|
|
}
|
|
|
|
} // extern "C"
|