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/*
 * Copyright (C) 2010 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 com.android.hierarchyviewer;

import com.android.SdkConstants;
import com.android.hierarchyviewerlib.HierarchyViewerDirector;

import java.io.File;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * This is the application version of the director.
 */
public class HierarchyViewerApplicationDirector extends HierarchyViewerDirector {

    private final ExecutorService mExecutor = Executors.newSingleThreadExecutor();

    public static HierarchyViewerDirector createDirector() {
        return sDirector = new HierarchyViewerApplicationDirector();
    }

    @Override
    public void terminate() {
        super.terminate();
        mExecutor.shutdown();
    }

    /*
     * Gets the location of adb. The script that runs the hierarchy viewer
     * defines com.android.hierarchyviewer.bindir.
     */
    @Override
    public String getAdbLocation() {
        String hvParentLocation = System.getProperty("com.android.hierarchyviewer.bindir"); //$NON-NLS-1$

        // in the new SDK, adb is in the platform-tools, but when run from the command line
        // in the Android source tree, then adb is next to hierarchyviewer.
        if (hvParentLocation != null && hvParentLocation.length() != 0) {
            // check if there's a platform-tools folder
            File platformTools = new File(new File(hvParentLocation).getParent(),
                    SdkConstants.FD_PLATFORM_TOOLS);
            if (platformTools.isDirectory()) {
                return platformTools.getAbsolutePath() + File.separator + SdkConstants.FN_ADB;
            }

            return hvParentLocation + File.separator + SdkConstants.FN_ADB;
        }

        return SdkConstants.FN_ADB;
    }

    /*
     * In the application, we handle background tasks using a single thread,
     * just to get rid of possible race conditions that can occur. We update the
     * progress bar to show that we are doing something in the background.
     */
    @Override
    public void executeInBackground(final String taskName, final Runnable task) {
        mExecutor.execute(new Runnable() {
            @Override
            public void run() {
                HierarchyViewerApplication.getMainWindow().startTask(taskName);
                task.run();
                HierarchyViewerApplication.getMainWindow().endTask();
            }
        });
    }

}