android/jni/DeviceMotionAndOrientationManager.cpp

/*
 * Copyright 2010, The Android Open Source Project
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "DeviceMotionAndOrientationManager.h"

#include "DeviceMotionClientImpl.h"
#include "DeviceOrientationClientImpl.h"
#include "DeviceOrientationController.h"
#include "WebViewCore.h"
#include "Frame.h"
#include "Page.h"

#include <DeviceOrientationClientMock.h>
#include <JNIHelp.h>

using namespace WebCore;

namespace android {

DeviceMotionAndOrientationManager::DeviceMotionAndOrientationManager(WebViewCore* webViewCore)
    : m_useMock(false)
    , m_webViewCore(webViewCore)
{
}

void DeviceMotionAndOrientationManager::useMock()
{
    m_useMock = true;
}

void DeviceMotionAndOrientationManager::setMockMotion(PassRefPtr<DeviceMotionData> motion)
{
    // TODO: There is not yet a DeviceMotion mock.
}

void DeviceMotionAndOrientationManager::onMotionChange(PassRefPtr<DeviceMotionData> motion)
{
    ASSERT(!m_useMock);
    static_cast<DeviceMotionClientImpl*>(m_motionClient.get())->onMotionChange(motion);
}

void DeviceMotionAndOrientationManager::setMockOrientation(PassRefPtr<DeviceOrientation> orientation)
{
    if (m_useMock)
        static_cast<DeviceOrientationClientMock*>(orientationClient())->setOrientation(orientation);
}

void DeviceMotionAndOrientationManager::onOrientationChange(PassRefPtr<DeviceOrientation> orientation)
{
    ASSERT(!m_useMock);
    static_cast<DeviceOrientationClientImpl*>(m_orientationClient.get())->onOrientationChange(orientation);
}

void DeviceMotionAndOrientationManager::maybeSuspendClients()
{
    if (!m_useMock) {
        if (m_motionClient)
            static_cast<DeviceMotionClientImpl*>(m_motionClient.get())->suspend();
        if (m_orientationClient)
            static_cast<DeviceOrientationClientImpl*>(m_orientationClient.get())->suspend();
    }
}

void DeviceMotionAndOrientationManager::maybeResumeClients()
{
    if (!m_useMock) {
        if (m_motionClient)
            static_cast<DeviceMotionClientImpl*>(m_motionClient.get())->resume();
        if (m_orientationClient)
            static_cast<DeviceOrientationClientImpl*>(m_orientationClient.get())->resume();
    }
}

DeviceMotionClient* DeviceMotionAndOrientationManager::motionClient()
{
    // TODO: There is not yet a DeviceMotion mock.
    if (!m_motionClient)
        m_motionClient.set(m_useMock ? 0
                : static_cast<DeviceMotionClient*>(new DeviceMotionClientImpl(m_webViewCore)));
    ASSERT(m_motionClient);
    return m_motionClient.get();
}

DeviceOrientationClient* DeviceMotionAndOrientationManager::orientationClient()
{
    if (!m_orientationClient)
        m_orientationClient.set(m_useMock ? new DeviceOrientationClientMock
                : static_cast<DeviceOrientationClient*>(new DeviceOrientationClientImpl(m_webViewCore)));
    ASSERT(m_orientationClient);
    return m_orientationClient.get();
}

// JNI for android.webkit.DeviceMotionAndOrientationManager
static const char* javaDeviceMotionAndOrientationManagerClass = "android/webkit/DeviceMotionAndOrientationManager";

static WebViewCore* getWebViewCore(JNIEnv* env, jobject webViewCoreObject)
{
    jclass webViewCoreClass = env->FindClass("android/webkit/WebViewCore");
    jfieldID nativeClassField = env->GetFieldID(webViewCoreClass, "mNativeClass", "I");
    env->DeleteLocalRef(webViewCoreClass);
    return reinterpret_cast<WebViewCore*>(env->GetIntField(webViewCoreObject, nativeClassField));
}

static void useMock(JNIEnv* env, jobject, jobject webViewCoreObject)
{
    getWebViewCore(env, webViewCoreObject)->deviceMotionAndOrientationManager()->useMock();
}

static void onMotionChange(JNIEnv* env, jobject, jobject webViewCoreObject, bool canProvideX, double x, bool canProvideY, double y, bool canProvideZ, double z, double interval)
{
    // We only provide accelerationIncludingGravity.
    RefPtr<DeviceMotionData::Acceleration> accelerationIncludingGravity = DeviceMotionData::Acceleration::create(canProvideX, x, canProvideY, y, canProvideZ, z);
    bool canProvideInterval = canProvideX || canProvideY || canProvideZ;
    RefPtr<DeviceMotionData> motion = DeviceMotionData::create(0, accelerationIncludingGravity.release(), 0, canProvideInterval, interval);
    getWebViewCore(env, webViewCoreObject)->deviceMotionAndOrientationManager()->onMotionChange(motion.release());
}

static void setMockOrientation(JNIEnv* env, jobject, jobject webViewCoreObject, bool canProvideAlpha, double alpha, bool canProvideBeta, double beta, bool canProvideGamma, double gamma)
{
    RefPtr<DeviceOrientation> orientation = DeviceOrientation::create(canProvideAlpha, alpha, canProvideBeta, beta, canProvideGamma, gamma);
    getWebViewCore(env, webViewCoreObject)->deviceMotionAndOrientationManager()->setMockOrientation(orientation.release());
}

static void onOrientationChange(JNIEnv* env, jobject, jobject webViewCoreObject, bool canProvideAlpha, double alpha, bool canProvideBeta, double beta, bool canProvideGamma, double gamma)
{
    RefPtr<DeviceOrientation> orientation = DeviceOrientation::create(canProvideAlpha, alpha, canProvideBeta, beta, canProvideGamma, gamma);
    getWebViewCore(env, webViewCoreObject)->deviceMotionAndOrientationManager()->onOrientationChange(orientation.release());
}

static JNINativeMethod gDeviceMotionAndOrientationManagerMethods[] = {
    { "nativeUseMock", "(Landroid/webkit/WebViewCore;)V", (void*) useMock },
    { "nativeOnMotionChange", "(Landroid/webkit/WebViewCore;ZDZDZDD)V", (void*) onMotionChange },
    { "nativeSetMockOrientation", "(Landroid/webkit/WebViewCore;ZDZDZD)V", (void*) setMockOrientation },
    { "nativeOnOrientationChange", "(Landroid/webkit/WebViewCore;ZDZDZD)V", (void*) onOrientationChange }
};

int registerDeviceMotionAndOrientationManager(JNIEnv* env)
{
#ifndef NDEBUG
    jclass deviceMotionAndOrientationManager = env->FindClass(javaDeviceMotionAndOrientationManagerClass);
    LOG_ASSERT(deviceMotionAndOrientationManager, "Unable to find class");
    env->DeleteLocalRef(deviceMotionAndOrientationManager);
#endif

    return jniRegisterNativeMethods(env, javaDeviceMotionAndOrientationManagerClass, gDeviceMotionAndOrientationManagerMethods, NELEM(gDeviceMotionAndOrientationManagerMethods));
}

} // namespace android