Chromecast: initial checkin of Android-based cast shell.

chromecast/shell/android/apk/src/org/chromium/chromecast/shell/CastBrowserHelper.java

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chromecast.shell;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Debug;
+import android.util.Log;
+
+import org.chromium.base.BaseSwitches;
+import org.chromium.base.CommandLine;
+import org.chromium.base.library_loader.LibraryLoader;
+import org.chromium.base.library_loader.ProcessInitException;
+import org.chromium.content.browser.BrowserStartupController;
+import org.chromium.content.browser.DeviceUtils;
+import org.chromium.content.common.ContentSwitches;
+
+/**
+ * Static, one-time initialization for the browser process.
+ */
+public class CastBrowserHelper {
+    private static final String TAG = "CastBrowserHelper";
+
+    public static final String COMMAND_LINE_FILE = "/data/local/tmp/castshell-command-line";
+    public static final String COMMAND_LINE_ARGS_KEY = "commandLineArgs";
+
+    private static boolean sIsBrowserInitialized = false;
+
+    /**
+     * Starts the browser process synchronously, returning success or failure. If the browser has
+     * already started, immediately returns true without performing any more initialization.
+     * This may only be called on the UI thread.
+     *
+     * @return whether or not the process started successfully
+     */
+    public static boolean initializeBrowser(Context context) {
+        if (sIsBrowserInitialized) return true;
+
+        Log.d(TAG, "Performing one-time browser initialization");
+
+        // Initializing the command line must occur before loading the library.
+        if (!CommandLine.isInitialized()) {
+            if (allowCommandLineImport()) {
+                Log.d(TAG, "Initializing command line from " + COMMAND_LINE_FILE);
+                CommandLine.initFromFile(COMMAND_LINE_FILE);
+            } else {
+                CommandLine.init(null);
+            }
+
+            if (context instanceof Activity) {
+                Intent launchingIntent = ((Activity) context).getIntent();
+                String[] commandLineParams = getCommandLineParamsFromIntent(launchingIntent);
+                if (commandLineParams != null) {
+                    CommandLine.getInstance().appendSwitchesAndArguments(commandLineParams);
+                }
+            }
+        }
+
+        CommandLine.getInstance().appendSwitchWithValue(
+                ContentSwitches.FORCE_DEVICE_SCALE_FACTOR, "1");
+
+        waitForDebuggerIfNeeded();
+
+        DeviceUtils.addDeviceSpecificUserAgentSwitch(context);
+
+        try {
+            LibraryLoader.ensureInitialized();
+
+            Log.d(TAG, "Loading BrowserStartupController...");
+            BrowserStartupController.get(context).startBrowserProcessesSync(false);
+
+            sIsBrowserInitialized = true;
+            return true;
+        } catch (ProcessInitException e) {
+            Log.e(TAG, "Unable to launch browser process.", e);
+            return false;
+        }
+    }
+
+    private static boolean allowCommandLineImport() {
+      return !Build.TYPE.equals("user");
+    }
+
+    private static String[] getCommandLineParamsFromIntent(Intent intent) {
+        return intent != null ? intent.getStringArrayExtra(COMMAND_LINE_ARGS_KEY) : null;
+    }
+
+    private static void waitForDebuggerIfNeeded() {
+        if (!CommandLine.getInstance().hasSwitch(BaseSwitches.WAIT_FOR_JAVA_DEBUGGER)) {
+            return;
+        }
+        Log.e(TAG, "Waiting for Java debugger to connect...");
+        Debug.waitForDebugger();
+        Log.e(TAG, "Java debugger connected. Resuming execution.");
+    }
+}