Android example source code file (JsResult.java)

This example Android source code file (JsResult.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

callbackproxy, jsresult

The JsResult.java Android example source code

/*
 * Copyright (C) 2007 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.
 */

package android.webkit;


public class JsResult {
    // This prevents a user from interacting with the result before WebCore is
    // ready to handle it.
    private boolean mReady;
    // Tells us if the user tried to confirm or cancel the result before WebCore
    // is ready.
    private boolean mTriedToNotifyBeforeReady;
    // This is a basic result of a confirm or prompt dialog.
    protected boolean mResult;
    /**
     *  This is the caller of the prompt and is the object that is waiting.
     *  @hide
     */
    protected final CallbackProxy mProxy;
    // This is the default value of the result.
    private final boolean mDefaultValue;

    /**
     * Handle the result if the user cancelled the dialog.
     */
    public final void cancel() {
        mResult = false;
        wakeUp();
    }

    /**
     * Handle a confirmation response from the user.
     */
    public final void confirm() {
        mResult = true;
        wakeUp();
    }

    /*package*/ JsResult(CallbackProxy proxy, boolean defaultVal) {
        mProxy = proxy;
        mDefaultValue = defaultVal;
    }

    /*package*/ final boolean getResult() {
        return mResult;
    }

    /*package*/ final void setReady() {
        mReady = true;
        if (mTriedToNotifyBeforeReady) {
            wakeUp();
        }
    }

    /*package*/ void handleDefault() {
        setReady();
        mResult = mDefaultValue;
        wakeUp();
    }

    /* Wake up the WebCore thread. */
    protected final void wakeUp() {
        if (mReady) {
            synchronized (mProxy) {
                mProxy.notify();
            }
        } else {
            mTriedToNotifyBeforeReady = true;
        }
    }
}