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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jni.h"
#include "core_jni_helpers.h"
#include <sstream>
#include <iostream>
#include <unicode/putil.h>
#include <unordered_map>
#include <vector>
using namespace std;
/*
* This is responsible for setting up the JNI environment for communication between
* the Java and native parts of layoutlib, including registering native methods.
* This is mostly achieved by copying the way it is done in the platform
* (see AndroidRuntime.cpp).
*/
static JavaVM* javaVM;
extern int register_android_graphics_Bitmap(JNIEnv*);
extern int register_android_graphics_BitmapFactory(JNIEnv*);
extern int register_android_graphics_ByteBufferStreamAdaptor(JNIEnv* env);
extern int register_android_graphics_CreateJavaOutputStreamAdaptor(JNIEnv* env);
extern int register_android_graphics_Graphics(JNIEnv* env);
extern int register_android_graphics_ImageDecoder(JNIEnv*);
extern int register_android_graphics_Interpolator(JNIEnv* env);
extern int register_android_graphics_MaskFilter(JNIEnv* env);
extern int register_android_graphics_NinePatch(JNIEnv*);
extern int register_android_graphics_PathEffect(JNIEnv* env);
extern int register_android_graphics_Shader(JNIEnv* env);
extern int register_android_graphics_Typeface(JNIEnv* env);
namespace android {
extern int register_android_animation_PropertyValuesHolder(JNIEnv *env);
extern int register_android_content_AssetManager(JNIEnv* env);
extern int register_android_content_StringBlock(JNIEnv* env);
extern int register_android_content_XmlBlock(JNIEnv* env);
extern int register_android_content_res_ApkAssets(JNIEnv* env);
extern int register_android_graphics_Canvas(JNIEnv* env);
extern int register_android_graphics_ColorFilter(JNIEnv* env);
extern int register_android_graphics_ColorSpace(JNIEnv* env);
extern int register_android_graphics_DrawFilter(JNIEnv* env);
extern int register_android_graphics_FontFamily(JNIEnv* env);
extern int register_android_graphics_Matrix(JNIEnv* env);
extern int register_android_graphics_Paint(JNIEnv* env);
extern int register_android_graphics_Path(JNIEnv* env);
extern int register_android_graphics_PathMeasure(JNIEnv* env);
extern int register_android_graphics_Picture(JNIEnv* env);
extern int register_android_graphics_Region(JNIEnv* env);
extern int register_android_graphics_animation_NativeInterpolatorFactory(JNIEnv* env);
extern int register_android_graphics_animation_RenderNodeAnimator(JNIEnv* env);
extern int register_android_graphics_drawable_AnimatedVectorDrawable(JNIEnv* env);
extern int register_android_graphics_drawable_VectorDrawable(JNIEnv* env);
extern int register_android_graphics_fonts_Font(JNIEnv* env);
extern int register_android_graphics_fonts_FontFamily(JNIEnv* env);
extern int register_android_graphics_text_LineBreaker(JNIEnv* env);
extern int register_android_graphics_text_MeasuredText(JNIEnv* env);
extern int register_android_os_FileObserver(JNIEnv* env);
extern int register_android_os_MessageQueue(JNIEnv* env);
extern int register_android_os_SystemClock(JNIEnv* env);
extern int register_android_os_SystemProperties(JNIEnv* env);
extern int register_android_os_Trace(JNIEnv* env);
extern int register_android_text_AndroidCharacter(JNIEnv* env);
extern int register_android_util_EventLog(JNIEnv* env);
extern int register_android_util_Log(JNIEnv* env);
extern int register_android_util_PathParser(JNIEnv* env);
extern int register_android_util_jar_StrictJarFile(JNIEnv* env);
extern int register_android_view_RenderNode(JNIEnv* env);
extern int register_android_view_DisplayListCanvas(JNIEnv* env);
extern int register_com_android_internal_util_VirtualRefBasePtr(JNIEnv *env);
#define REG_JNI(name) { name }
struct RegJNIRec {
int (*mProc)(JNIEnv*);
};
// Map of all possible class names to register to their corresponding JNI registration function pointer
// The actual list of registered classes will be determined at runtime via the 'native_classes' System property
static const std::unordered_map<std::string, RegJNIRec> gRegJNIMap = {
{"android.animation.PropertyValuesHolder",
REG_JNI(register_android_animation_PropertyValuesHolder)},
#ifdef __linux__
{"android.content.res.ApkAssets", REG_JNI(register_android_content_res_ApkAssets)},
{"android.content.res.AssetManager", REG_JNI(register_android_content_AssetManager)},
#endif
{"android.content.res.StringBlock", REG_JNI(register_android_content_StringBlock)},
{"android.content.res.XmlBlock", REG_JNI(register_android_content_XmlBlock)},
{"android.graphics.Bitmap", REG_JNI(register_android_graphics_Bitmap)},
{"android.graphics.BitmapFactory", REG_JNI(register_android_graphics_BitmapFactory)},
{"android.graphics.ByteBufferStreamAdaptor",
REG_JNI(register_android_graphics_ByteBufferStreamAdaptor)},
{"android.graphics.Canvas", REG_JNI(register_android_graphics_Canvas)},
{"android.graphics.RenderNode", REG_JNI(register_android_view_RenderNode)},
{"android.graphics.ColorFilter", REG_JNI(register_android_graphics_ColorFilter)},
{"android.graphics.ColorSpace", REG_JNI(register_android_graphics_ColorSpace)},
{"android.graphics.CreateJavaOutputStreamAdaptor",
REG_JNI(register_android_graphics_CreateJavaOutputStreamAdaptor)},
{"android.graphics.DrawFilter", REG_JNI(register_android_graphics_DrawFilter)},
{"android.graphics.FontFamily", REG_JNI(register_android_graphics_FontFamily)},
{"android.graphics.Graphics", REG_JNI(register_android_graphics_Graphics)},
{"android.graphics.ImageDecoder", REG_JNI(register_android_graphics_ImageDecoder)},
{"android.graphics.Interpolator", REG_JNI(register_android_graphics_Interpolator)},
{"android.graphics.MaskFilter", REG_JNI(register_android_graphics_MaskFilter)},
{"android.graphics.Matrix", REG_JNI(register_android_graphics_Matrix)},
{"android.graphics.NinePatch", REG_JNI(register_android_graphics_NinePatch)},
{"android.graphics.Paint", REG_JNI(register_android_graphics_Paint)},
{"android.graphics.Path", REG_JNI(register_android_graphics_Path)},
{"android.graphics.PathEffect", REG_JNI(register_android_graphics_PathEffect)},
{"android.graphics.PathMeasure", REG_JNI(register_android_graphics_PathMeasure)},
{"android.graphics.Picture", REG_JNI(register_android_graphics_Picture)},
{"android.graphics.RecordingCanvas", REG_JNI(register_android_view_DisplayListCanvas)},
{"android.graphics.Region", REG_JNI(register_android_graphics_Region)},
{"android.graphics.Shader", REG_JNI(register_android_graphics_Shader)},
{"android.graphics.Typeface", REG_JNI(register_android_graphics_Typeface)},
{"android.graphics.animation.NativeInterpolatorFactory",
REG_JNI(register_android_graphics_animation_NativeInterpolatorFactory)},
{"android.graphics.animation.RenderNodeAnimator",
REG_JNI(register_android_graphics_animation_RenderNodeAnimator)},
{"android.graphics.drawable.AnimatedVectorDrawable",
REG_JNI(register_android_graphics_drawable_AnimatedVectorDrawable)},
{"android.graphics.drawable.VectorDrawable",
REG_JNI(register_android_graphics_drawable_VectorDrawable)},
{"android.graphics.fonts.Font", REG_JNI(register_android_graphics_fonts_Font)},
{"android.graphics.fonts.FontFamily", REG_JNI(register_android_graphics_fonts_FontFamily)},
{"android.graphics.text.LineBreaker", REG_JNI(register_android_graphics_text_LineBreaker)},
{"android.graphics.text.MeasuredText",
REG_JNI(register_android_graphics_text_MeasuredText)},
#ifdef __linux__
{"android.os.FileObserver", REG_JNI(register_android_os_FileObserver)},
{"android.os.MessageQueue", REG_JNI(register_android_os_MessageQueue)},
#endif
{"android.os.SystemClock", REG_JNI(register_android_os_SystemClock)},
{"android.os.SystemProperties", REG_JNI(register_android_os_SystemProperties)},
{"android.os.Trace", REG_JNI(register_android_os_Trace)},
{"android.text.AndroidCharacter", REG_JNI(register_android_text_AndroidCharacter)},
{"android.util.EventLog", REG_JNI(register_android_util_EventLog)},
{"android.util.Log", REG_JNI(register_android_util_Log)},
{"android.util.PathParser", REG_JNI(register_android_util_PathParser)},
{"android.util.jar.StrictJarFile", REG_JNI(register_android_util_jar_StrictJarFile)},
{"com.android.internal.util.VirtualRefBasePtr",
REG_JNI(register_com_android_internal_util_VirtualRefBasePtr)},
};
// Vector to store the names of classes that need delegates of their native methods
static vector<string> classesToDelegate;
static int register_jni_procs(const std::unordered_map<std::string, RegJNIRec>& jniRegMap,
const vector<string>& classesToRegister, JNIEnv* env) {
for (const string& className : classesToRegister) {
if (jniRegMap.at(className).mProc(env) < 0) {
return -1;
}
}
return 0;
}
int AndroidRuntime::registerNativeMethods(JNIEnv* env,
const char* className, const JNINativeMethod* gMethods, int numMethods) {
string classNameString = string(className);
if (find(classesToDelegate.begin(), classesToDelegate.end(), classNameString)
!= classesToDelegate.end()) {
// Register native methods to the delegate class <classNameString>_NativeDelegate
// by adding _Original to the name of each method.
replace(classNameString.begin(), classNameString.end(), '$', '_');
string delegateClassName = classNameString + "_NativeDelegate";
jclass clazz = env->FindClass(delegateClassName.c_str());
JNINativeMethod gTypefaceDelegateMethods[numMethods];
for (int i = 0; i < numMethods; i++) {
JNINativeMethod gTypefaceMethod = gMethods[i];
string newName = string(gTypefaceMethod.name) + "_Original";
gTypefaceDelegateMethods[i].name = strdup(newName.c_str());
gTypefaceDelegateMethods[i].signature = gTypefaceMethod.signature;
gTypefaceDelegateMethods[i].fnPtr = gTypefaceMethod.fnPtr;
}
int result = env->RegisterNatives(clazz, gTypefaceDelegateMethods, numMethods);
for (int i = 0; i < numMethods; i++) {
free((char*)gTypefaceDelegateMethods[i].name);
}
return result;
}
jclass clazz = env->FindClass(className);
return env->RegisterNatives(clazz, gMethods, numMethods);
}
JNIEnv* AndroidRuntime::getJNIEnv() {
JNIEnv* env;
if (javaVM->GetEnv((void**) &env, JNI_VERSION_1_6) != JNI_OK)
return nullptr;
return env;
}
JavaVM* AndroidRuntime::getJavaVM() {
return javaVM;
}
static vector<string> parseCsv(const string& csvString) {
vector<string> result;
istringstream stream(csvString);
string segment;
while(getline(stream, segment, ','))
{
result.push_back(segment);
}
return result;
}
static vector<string> parseCsv(JNIEnv* env, jstring csvJString) {
const char* charArray = env->GetStringUTFChars(csvJString, 0);
string csvString(charArray);
vector<string> result = parseCsv(csvString);
env->ReleaseStringUTFChars(csvJString, charArray);
return result;
}
} // namespace android
using namespace android;
JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void*) {
javaVM = vm;
JNIEnv* env = nullptr;
if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
return JNI_ERR;
}
// Configuration is stored as java System properties.
// Get a reference to System.getProperty
jclass system = FindClassOrDie(env, "java/lang/System");
jmethodID getPropertyMethod = GetStaticMethodIDOrDie(env, system, "getProperty",
"(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;");
// Get the names of classes that have to delegate their native methods
auto delegateNativesToNativesString =
(jstring) env->CallStaticObjectMethod(system,
getPropertyMethod, env->NewStringUTF("delegate_natives_to_natives"),
env->NewStringUTF(""));
classesToDelegate = parseCsv(env, delegateNativesToNativesString);
// Get the names of classes that need to register their native methods
auto nativesClassesJString =
(jstring) env->CallStaticObjectMethod(system,
getPropertyMethod, env->NewStringUTF("native_classes"),
env->NewStringUTF(""));
vector<string> classesToRegister = parseCsv(env, nativesClassesJString);
if (register_jni_procs(gRegJNIMap, classesToRegister, env) < 0) {
return JNI_ERR;
}
// Set the location of ICU data
auto stringPath = (jstring) env->CallStaticObjectMethod(system,
getPropertyMethod, env->NewStringUTF("icu.dir"),
env->NewStringUTF(""));
const char* path = env->GetStringUTFChars(stringPath, 0);
u_setDataDirectory(path);
env->ReleaseStringUTFChars(stringPath, path);
return JNI_VERSION_1_6;
}
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