content: /*
   * Copyright (C) 2016 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.server.webkit;
  
  import android.os.RemoteException;
  import android.os.ShellCommand;
  import android.webkit.IWebViewUpdateService;
  
  import java.io.PrintWriter;
  
  class WebViewUpdateServiceShellCommand extends ShellCommand {
      final IWebViewUpdateService mInterface;
  
      WebViewUpdateServiceShellCommand(IWebViewUpdateService service) {
          mInterface = service;
      }
  
      @Override
      public int onCommand(String cmd) {
          if (cmd == null) {
              return handleDefaultCommands(cmd);
          }
  
          final PrintWriter pw = getOutPrintWriter();
          try {
              switch(cmd) {
                  case "set-webview-implementation":
                      return setWebViewImplementation();
                  case "enable-multiprocess":
                      return enableMultiProcess(true);
                  case "disable-multiprocess":
                      return enableMultiProcess(false);
                  default:
                      return handleDefaultCommands(cmd);
              }
          } catch (RemoteException e) {
              pw.println("Remote exception: " + e);
          }
          return -1;
      }
  
      private int setWebViewImplementation() throws RemoteException {
          final PrintWriter pw = getOutPrintWriter();
          String shellChosenPackage = getNextArg();
          if (shellChosenPackage == null) {
              pw.println("Failed to switch, no PACKAGE provided.");
              pw.println("");
              helpSetWebViewImplementation();
              return 1;
          }
          String newPackage = mInterface.changeProviderAndSetting(shellChosenPackage);
          if (shellChosenPackage.equals(newPackage)) {
              pw.println("Success");
              return 0;
          } else {
              pw.println(String.format(
                          "Failed to switch to %s, the WebView implementation is now provided by %s.",
                          shellChosenPackage, newPackage));
              return 1;
          }
      }
  
      private int enableMultiProcess(boolean enable) throws RemoteException {
          final PrintWriter pw = getOutPrintWriter();
          mInterface.enableMultiProcess(enable);
          pw.println("Success");
          return 0;
      }
  
      public void helpSetWebViewImplementation() {
          PrintWriter pw = getOutPrintWriter();
          pw.println("  set-webview-implementation PACKAGE");
          pw.println("    Set the WebView implementation to the specified package.");
      }
  
      @Override
      public void onHelp() {
          PrintWriter pw = getOutPrintWriter();
          pw.println("WebView updater commands:");
          pw.println("  help");
          pw.println("    Print this help text.");
          pw.println("");
          helpSetWebViewImplementation();
          pw.println("  enable-multiprocess");
          pw.println("    Enable multi-process mode for WebView");
          pw.println("  disable-multiprocess");
          pw.println("    Disable multi-process mode for WebView");
          pw.println();
      }
  }
  