Move DocumentTabModelSelector and related classes upstream

chrome/android/java/src/org/chromium/chrome/browser/document/DocumentUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/document/DocumentUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/document/DocumentUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/document/DocumentUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..e62d51490dd5e1ea30b7aabb3824d0a17bad9b90
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/document/DocumentUtils.java
@@ -0,0 +1,138 @@
+// 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.chrome.browser.document;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.app.ActivityManager.AppTask;
+import android.app.ActivityManager.RecentTaskInfo;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Build;
+import android.text.TextUtils;
+import android.util.Log;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.base.ApplicationStatus;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Deals with Document-related API calls.
+ */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class DocumentUtils {
+    public static final String TAG = "DocumentUtilities";
+
+    /**
+     * Update the Recents entry for the Activity.
+     * @param activity Activity to change the entry for.
+     * @param title Title to show on the card.
+     * @param icon Icon to show on the card.
+     * @param color Color to use for the card's bar.
+     * @param useDefaultStatusBarColor Whether status bar should be set to default color.
+     */
+    public static void updateTaskDescription(Activity activity, String title, Bitmap icon,
+            int color, boolean useDefaultStatusBarColor) {
+        ApiCompatibilityUtils.setTaskDescription(activity, title, icon, color);
+        int statusBarColor = useDefaultStatusBarColor
+                ? Color.BLACK : BrandColorUtils.computeStatusBarColor(color);
+        ApiCompatibilityUtils.setStatusBarColor(activity, statusBarColor);
+    }
+
+    /**
+     * Finishes tasks other than the one with the given ID that were started with the given data
+     * in the Intent, removing those tasks from Recents and leaving a unique task with the data.
+     * @param data Passed in as part of the Intent's data when starting the Activity.
+     * @param canonicalTaskId ID of the task will be the only one left with the ID.
+     * @return Intent of one of the tasks that were finished.
+     */
+    public static Intent finishOtherTasksWithData(Uri data, int canonicalTaskId) {
+        if (data == null || Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return null;
+
+        String dataString = data.toString();
+        Context context = ApplicationStatus.getApplicationContext();
+
+        ActivityManager manager =
+                (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        List<ActivityManager.AppTask> tasksToFinish = new ArrayList<ActivityManager.AppTask>();
+        for (ActivityManager.AppTask task : manager.getAppTasks()) {
+            RecentTaskInfo taskInfo = getTaskInfoFromTask(task);
+            if (taskInfo == null) continue;
+            int taskId = taskInfo.id;
+
+            Intent baseIntent = taskInfo.baseIntent;
+            String taskData = baseIntent == null ? null : taskInfo.baseIntent.getDataString();
+
+            if (!TextUtils.equals(dataString, taskData)) continue;
+            if (taskId == -1 || taskId != canonicalTaskId) {
+                tasksToFinish.add(task);
+            }
+        }
+
+        Intent removedIntent = null;
+        for (ActivityManager.AppTask task : tasksToFinish) {
+            removedIntent = getBaseIntentFromTask(task);
+            Log.d(TAG, "Removing duplicated task: " + task);
+            task.finishAndRemoveTask();
+        }
+        return removedIntent;
+    }
+
+    /**
+     * Returns the RecentTaskInfo for the task, if the ActivityManager succeeds in finding the task.
+     * @param task AppTask containing information about a task.
+     * @return The RecentTaskInfo associated with the task, or null if it couldn't be found.
+     */
+    public static RecentTaskInfo getTaskInfoFromTask(AppTask task) {
+        RecentTaskInfo info = null;
+        try {
+            info = task.getTaskInfo();
+        } catch (IllegalArgumentException e) {
+            Log.e(TAG, "Failed to retrieve task info: ", e);
+        }
+        return info;
+    }
+
+    /**
+     * Returns the baseIntent of the RecentTaskInfo associated with the given task.
+     * @param task Task to get the baseIntent for.
+     * @return The baseIntent, or null if it couldn't be retrieved.
+     */
+    public static Intent getBaseIntentFromTask(AppTask task) {
+        RecentTaskInfo info = getTaskInfoFromTask(task);
+        return info == null ? null : info.baseIntent;
+    }
+
+    /**
+     * Given an AppTask retrieves the task class name.
+     * @param task The app task to use.
+     * @param pm The package manager to use for resolving intent.
+     * @return Fully qualified class name or null if we were not able to
+     * determine it.
+     */
+    public static String getTaskClassName(AppTask task, PackageManager pm) {
+        RecentTaskInfo info = getTaskInfoFromTask(task);
+        if (info == null) return null;
+
+        Intent baseIntent = info.baseIntent;
+        if (baseIntent == null) {
+            return null;
+        } else if (baseIntent.getComponent() != null) {
+            return baseIntent.getComponent().getClassName();
+        } else {
+            ResolveInfo resolveInfo = pm.resolveActivity(baseIntent, 0);
+            if (resolveInfo == null) return null;
+            return resolveInfo.activityInfo.name;
+        }
+    }
+}