Bug 564327 - Add Android widgets backend [2/2], patch by vlad, alexp, blassey, and me. r=dougt, sr=roc
This commit is contained in:
Michael Wu
237
widget/src/android/AndroidBridge.cpp
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237
widget/src/android/AndroidBridge.cpp
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/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Android code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Vladimir Vukicevic <vladimir@pobox.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <android/log.h>
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#include <pthread.h>
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#include <prthread.h>
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#include "AndroidBridge.h"
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using namespace mozilla;
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static PRUintn sJavaEnvThreadIndex = 0;
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AndroidBridge *AndroidBridge::sBridge = 0;
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static void
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JavaThreadDetachFunc(void *arg)
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{
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JNIEnv *env = (JNIEnv*) arg;
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JavaVM *vm = NULL;
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env->GetJavaVM(&vm);
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vm->DetachCurrentThread();
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}
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AndroidBridge *
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AndroidBridge::ConstructBridge(JNIEnv *jEnv,
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jclass jGeckoAppShellClass)
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{
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/* NSS hack -- bionic doesn't handle recursive unloads correctly,
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* because library finalizer functions are called with the dynamic
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* linker lock still held. This results in a deadlock when trying
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* to call dlclose() while we're already inside dlclose().
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* Conveniently, NSS has an env var that can prevent it from unloading.
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*/
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putenv(strdup("NSS_DISABLE_UNLOAD=1"));
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sBridge = new AndroidBridge();
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if (!sBridge->Init(jEnv, jGeckoAppShellClass)) {
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delete sBridge;
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sBridge = 0;
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}
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PR_NewThreadPrivateIndex(&sJavaEnvThreadIndex, JavaThreadDetachFunc);
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return sBridge;
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}
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PRBool
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AndroidBridge::Init(JNIEnv *jEnv,
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jclass jGeckoAppShellClass)
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{
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jEnv->GetJavaVM(&mJavaVM);
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mJNIEnv = nsnull;
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mThread = nsnull;
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mGeckoAppShellClass = (jclass) jEnv->NewGlobalRef(jGeckoAppShellClass);
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jShowIME = (jmethodID) jEnv->GetStaticMethodID(jGeckoAppShellClass, "showIME", "(I)V");
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jEnableAccelerometer = (jmethodID) jEnv->GetStaticMethodID(jGeckoAppShellClass, "enableAccelerometer", "(Z)V");
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jReturnIMEQueryResult = (jmethodID) jEnv->GetStaticMethodID(jGeckoAppShellClass, "returnIMEQueryResult", "(Ljava/lang/String;II)V");
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jScheduleRestart = (jmethodID) jEnv->GetStaticMethodID(jGeckoAppShellClass, "scheduleRestart", "()V");
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jNotifyXreExit = (jmethodID) jEnv->GetStaticMethodID(jGeckoAppShellClass, "onXreExit", "()V");
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InitAndroidJavaWrappers(jEnv);
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// jEnv should NOT be cached here by anything -- the jEnv here
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// is not valid for the real gecko main thread, which is set
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// at SetMainThread time.
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return PR_TRUE;
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}
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JNIEnv *
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AndroidBridge::AttachThread(PRBool asDaemon)
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{
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JNIEnv *jEnv = (JNIEnv*) PR_GetThreadPrivate(sJavaEnvThreadIndex);
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if (jEnv)
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return jEnv;
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JavaVMAttachArgs args = {
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JNI_VERSION_1_2,
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"GeckoThread",
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NULL
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};
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jint res = 0;
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if (asDaemon) {
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res = mJavaVM->AttachCurrentThreadAsDaemon(&jEnv, &args);
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} else {
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res = mJavaVM->AttachCurrentThread(&jEnv, &args);
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}
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if (res != 0) {
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ALOG("AttachCurrentThread failed!");
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return nsnull;
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}
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PR_SetThreadPrivate(sJavaEnvThreadIndex, jEnv);
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return jEnv;
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}
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PRBool
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AndroidBridge::SetMainThread(void *thr)
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{
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if (thr) {
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mJNIEnv = AttachThread(PR_FALSE);
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if (!mJNIEnv)
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return PR_FALSE;
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mThread = thr;
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} else {
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mJNIEnv = nsnull;
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mThread = nsnull;
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}
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return PR_TRUE;
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}
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void
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AndroidBridge::EnsureJNIThread()
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{
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JNIEnv *env;
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if (mJavaVM->AttachCurrentThread(&env, NULL) != 0) {
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ALOG("EnsureJNIThread: test Attach failed!");
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return;
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}
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if ((void*)pthread_self() != mThread) {
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ALOG("###!!!!!!! Something's grabbing the JNIEnv from the wrong thread! (thr %p should be %p)",
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(void*)pthread_self(), (void*)mThread);
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}
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}
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void
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AndroidBridge::ShowIME(int aState)
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{
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mJNIEnv->CallStaticVoidMethod(mGeckoAppShellClass, jShowIME, aState);
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}
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void
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AndroidBridge::EnableAccelerometer(bool aEnable)
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{
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mJNIEnv->CallStaticVoidMethod(mGeckoAppShellClass, jEnableAccelerometer, aEnable);
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}
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void
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AndroidBridge::ReturnIMEQueryResult(const PRUnichar *result, PRUint32 len, int selectionStart, int selectionEnd)
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{
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jvalue args[3];
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args[0].l = mJNIEnv->NewString(result, len);
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args[1].i = selectionStart;
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args[2].i = selectionEnd;
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mJNIEnv->CallStaticVoidMethodA(mGeckoAppShellClass, jReturnIMEQueryResult, args);
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}
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void
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AndroidBridge::ScheduleRestart()
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{
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ALOG("scheduling reboot");
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mJNIEnv->CallStaticVoidMethod(mGeckoAppShellClass, jScheduleRestart);
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}
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void
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AndroidBridge::NotifyXreExit()
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{
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ALOG("xre exiting");
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mJNIEnv->CallStaticVoidMethod(mGeckoAppShellClass, jNotifyXreExit);
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}
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void
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AndroidBridge::SetSurfaceView(jobject obj)
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{
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mSurfaceView.Init(obj);
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}
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// Available for places elsewhere in the code to link to.
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PRBool
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mozilla_AndroidBridge_SetMainThread(void *thr)
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{
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return AndroidBridge::Bridge()->SetMainThread(thr);
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}
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JavaVM *
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mozilla_AndroidBridge_GetJavaVM()
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{
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return AndroidBridge::Bridge()->VM();
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}
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JNIEnv *
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mozilla_AndroidBridge_AttachThread(PRBool asDaemon)
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{
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return AndroidBridge::Bridge()->AttachThread(asDaemon);
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}
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extern "C" JNIEnv * GetJNIForThread()
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{
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return mozilla::AndroidBridge::JNIForThread();
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}
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