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Diffstat (limited to 'widget/android/jni/GeckoBundleUtils.cpp')
| -rw-r--r-- | widget/android/jni/GeckoBundleUtils.cpp | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/widget/android/jni/GeckoBundleUtils.cpp b/widget/android/jni/GeckoBundleUtils.cpp new file mode 100644 index 0000000000..7bb0507279 --- /dev/null +++ b/widget/android/jni/GeckoBundleUtils.cpp @@ -0,0 +1,290 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/jni/GeckoBundleUtils.h" + +#include "JavaBuiltins.h" +#include "js/Warnings.h" +#include "nsJSUtils.h" + +#include "js/Array.h" + +namespace mozilla::jni { +namespace detail { +bool CheckJS(JSContext* aCx, bool aResult) { + if (!aResult) { + JS_ClearPendingException(aCx); + } + return aResult; +} + +nsresult BoxString(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut) { + if (aData.isNullOrUndefined()) { + aOut = nullptr; + return NS_OK; + } + + MOZ_ASSERT(aData.isString()); + + JS::Rooted<JSString*> str(aCx, aData.toString()); + + if (JS::StringHasLatin1Chars(str)) { + nsAutoJSString autoStr; + NS_ENSURE_TRUE(CheckJS(aCx, autoStr.init(aCx, str)), NS_ERROR_FAILURE); + + // StringParam can automatically convert a nsString to jstring. + aOut = jni::StringParam(autoStr, aOut.Env(), fallible); + if (!aOut) { + return NS_ERROR_FAILURE; + } + return NS_OK; + } + + // Two-byte string + JNIEnv* const env = aOut.Env(); + const char16_t* chars; + { + JS::AutoCheckCannotGC nogc; + size_t len = 0; + chars = JS_GetTwoByteStringCharsAndLength(aCx, nogc, str, &len); + if (chars) { + aOut = jni::String::LocalRef::Adopt( + env, env->NewString(reinterpret_cast<const jchar*>(chars), len)); + } + } + if (NS_WARN_IF(!CheckJS(aCx, !!chars) || !aOut)) { + env->ExceptionClear(); + return NS_ERROR_FAILURE; + } + return NS_OK; +} + +nsresult BoxObject(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut); + +template <typename Type, bool (JS::Value::*IsType)() const, + Type (JS::Value::*ToType)() const, class ArrayType, + typename ArrayType::LocalRef (*NewArray)(const Type*, size_t)> +nsresult BoxArrayPrimitive(JSContext* aCx, JS::Handle<JSObject*> aData, + jni::Object::LocalRef& aOut, size_t aLength, + JS::Handle<JS::Value> aElement) { + JS::Rooted<JS::Value> element(aCx); + auto data = MakeUnique<Type[]>(aLength); + data[0] = (aElement.get().*ToType)(); + + for (size_t i = 1; i < aLength; i++) { + NS_ENSURE_TRUE(CheckJS(aCx, JS_GetElement(aCx, aData, i, &element)), + NS_ERROR_FAILURE); + NS_ENSURE_TRUE((element.get().*IsType)(), NS_ERROR_INVALID_ARG); + + data[i] = (element.get().*ToType)(); + } + aOut = (*NewArray)(data.get(), aLength); + return NS_OK; +} + +template <class Type, + nsresult (*Box)(JSContext*, JS::Handle<JS::Value>, + jni::Object::LocalRef&), + typename IsType> +nsresult BoxArrayObject(JSContext* aCx, JS::Handle<JSObject*> aData, + jni::Object::LocalRef& aOut, size_t aLength, + JS::Handle<JS::Value> aElement, IsType&& aIsType) { + auto out = jni::ObjectArray::New<Type>(aLength); + JS::Rooted<JS::Value> element(aCx); + jni::Object::LocalRef jniElement(aOut.Env()); + + nsresult rv = (*Box)(aCx, aElement, jniElement); + NS_ENSURE_SUCCESS(rv, rv); + out->SetElement(0, jniElement); + + for (size_t i = 1; i < aLength; i++) { + NS_ENSURE_TRUE(CheckJS(aCx, JS_GetElement(aCx, aData, i, &element)), + NS_ERROR_FAILURE); + NS_ENSURE_TRUE(element.isNullOrUndefined() || aIsType(element), + NS_ERROR_INVALID_ARG); + + rv = (*Box)(aCx, element, jniElement); + NS_ENSURE_SUCCESS(rv, rv); + out->SetElement(i, jniElement); + } + aOut = out; + return NS_OK; +} + +nsresult BoxArray(JSContext* aCx, JS::Handle<JSObject*> aData, + jni::Object::LocalRef& aOut) { + uint32_t length = 0; + NS_ENSURE_TRUE(CheckJS(aCx, JS::GetArrayLength(aCx, aData, &length)), + NS_ERROR_FAILURE); + + if (!length) { + // Always represent empty arrays as an empty boolean array. + aOut = java::GeckoBundle::EMPTY_BOOLEAN_ARRAY(); + return NS_OK; + } + + // We only check the first element's type. If the array has mixed types, + // we'll throw an error during actual conversion. + JS::Rooted<JS::Value> element(aCx); + NS_ENSURE_TRUE(CheckJS(aCx, JS_GetElement(aCx, aData, 0, &element)), + NS_ERROR_FAILURE); + + if (element.isBoolean()) { + return BoxArrayPrimitive<bool, &JS::Value::isBoolean, &JS::Value::toBoolean, + jni::BooleanArray, &jni::BooleanArray::New>( + aCx, aData, aOut, length, element); + } + + if (element.isInt32()) { + nsresult rv = + BoxArrayPrimitive<int32_t, &JS::Value::isInt32, &JS::Value::toInt32, + jni::IntArray, &jni::IntArray::New>(aCx, aData, aOut, + length, element); + if (rv != NS_ERROR_INVALID_ARG) { + return rv; + } + // Not int32, but we can still try a double array. + } + + if (element.isNumber()) { + return BoxArrayPrimitive<double, &JS::Value::isNumber, &JS::Value::toNumber, + jni::DoubleArray, &jni::DoubleArray::New>( + aCx, aData, aOut, length, element); + } + + if (element.isNullOrUndefined() || element.isString()) { + const auto isString = [](JS::Handle<JS::Value> val) -> bool { + return val.isString(); + }; + nsresult rv = BoxArrayObject<jni::String, &BoxString>( + aCx, aData, aOut, length, element, isString); + if (element.isString() || rv != NS_ERROR_INVALID_ARG) { + return rv; + } + // First element was null/undefined, so it may still be an object array. + } + + const auto isObject = [aCx](JS::Handle<JS::Value> val) -> bool { + if (!val.isObject()) { + return false; + } + bool array = false; + JS::Rooted<JSObject*> obj(aCx, &val.toObject()); + // We don't support array of arrays. + return CheckJS(aCx, JS::IsArrayObject(aCx, obj, &array)) && !array; + }; + + if (element.isNullOrUndefined() || isObject(element)) { + return BoxArrayObject<java::GeckoBundle, &BoxObject>( + aCx, aData, aOut, length, element, isObject); + } + + NS_WARNING("Unknown type"); + return NS_ERROR_INVALID_ARG; +} + +nsresult BoxValue(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut); + +nsresult BoxObject(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut) { + if (aData.isNullOrUndefined()) { + aOut = nullptr; + return NS_OK; + } + + MOZ_ASSERT(aData.isObject()); + + JS::Rooted<JS::IdVector> ids(aCx, JS::IdVector(aCx)); + JS::Rooted<JSObject*> obj(aCx, &aData.toObject()); + + bool isArray = false; + if (CheckJS(aCx, JS::IsArrayObject(aCx, obj, &isArray)) && isArray) { + return BoxArray(aCx, obj, aOut); + } + + NS_ENSURE_TRUE(CheckJS(aCx, JS_Enumerate(aCx, obj, &ids)), NS_ERROR_FAILURE); + + const size_t length = ids.length(); + auto keys = jni::ObjectArray::New<jni::String>(length); + auto values = jni::ObjectArray::New<jni::Object>(length); + + // Iterate through each property of the JS object. + for (size_t i = 0; i < ids.length(); i++) { + const JS::RootedId id(aCx, ids[i]); + JS::Rooted<JS::Value> idVal(aCx); + JS::Rooted<JS::Value> val(aCx); + jni::Object::LocalRef key(aOut.Env()); + jni::Object::LocalRef value(aOut.Env()); + + NS_ENSURE_TRUE(CheckJS(aCx, JS_IdToValue(aCx, id, &idVal)), + NS_ERROR_FAILURE); + + JS::Rooted<JSString*> idStr(aCx, JS::ToString(aCx, idVal)); + NS_ENSURE_TRUE(CheckJS(aCx, !!idStr), NS_ERROR_FAILURE); + + idVal.setString(idStr); + NS_ENSURE_SUCCESS(BoxString(aCx, idVal, key), NS_ERROR_FAILURE); + NS_ENSURE_TRUE(CheckJS(aCx, JS_GetPropertyById(aCx, obj, id, &val)), + NS_ERROR_FAILURE); + + nsresult rv = BoxValue(aCx, val, value); + if (rv == NS_ERROR_INVALID_ARG && !JS_IsExceptionPending(aCx)) { + nsAutoJSString autoStr; + if (CheckJS(aCx, autoStr.init(aCx, idVal.toString()))) { + JS_ReportErrorUTF8(aCx, "Invalid event data property %s", + NS_ConvertUTF16toUTF8(autoStr).get()); + } + } + NS_ENSURE_SUCCESS(rv, rv); + + keys->SetElement(i, key); + values->SetElement(i, value); + } + + aOut = java::GeckoBundle::New(keys, values); + return NS_OK; +} + +nsresult BoxValue(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut) { + if (aData.isNullOrUndefined()) { + aOut = nullptr; + } else if (aData.isBoolean()) { + aOut = aData.toBoolean() ? java::sdk::Boolean::TRUE() + : java::sdk::Boolean::FALSE(); + } else if (aData.isInt32()) { + aOut = java::sdk::Integer::ValueOf(aData.toInt32()); + } else if (aData.isNumber()) { + aOut = java::sdk::Double::New(aData.toNumber()); + } else if (aData.isString()) { + return BoxString(aCx, aData, aOut); + } else if (aData.isObject()) { + return BoxObject(aCx, aData, aOut); + } else { + NS_WARNING("Unknown type"); + return NS_ERROR_INVALID_ARG; + } + return NS_OK; +} + +} // namespace detail + +nsresult BoxData(JSContext* aCx, JS::Handle<JS::Value> aData, + jni::Object::LocalRef& aOut, bool aObjectOnly) { + nsresult rv = NS_ERROR_INVALID_ARG; + + if (!aObjectOnly) { + rv = detail::BoxValue(aCx, aData, aOut); + } else if (aData.isObject() || aData.isNullOrUndefined()) { + rv = detail::BoxObject(aCx, aData, aOut); + } + + return rv; +} +} // namespace mozilla::jni |