Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/gsa/ContextReporter.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/gsa/ContextReporter.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/gsa/ContextReporter.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/gsa/ContextReporter.java
new file mode 100644
index 0000000000000000000000000000000000000000..0ddc801230bd9b0dbac769a07c3236242e8b6cf5
--- /dev/null
+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/gsa/ContextReporter.java
@@ -0,0 +1,232 @@
+// Copyright 2015 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.gsa;
+
+import android.text.TextUtils;
+
+import org.chromium.base.Log;
+import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.contextualsearch.ContextualSearchObserver;
+import org.chromium.chrome.browser.sync.ProfileSyncService;
+import org.chromium.chrome.browser.tabmodel.EmptyTabModelObserver;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType;
+import org.chromium.chrome.browser.tabmodel.TabModelObserver;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
+import org.chromium.sync.internal_api.pub.PassphraseType;
+import org.chromium.sync.internal_api.pub.base.ModelType;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import javax.annotation.Nullable;
+
+/**
+ * Reports context to GSA for search quality.
+ */
+public class ContextReporter {
+    private static final String TAG = Log.makeTag("GSA");
+
+    // Values for UMA histogram.
+    public static final int STATUS_SUCCESS = 0;
+    public static final int STATUS_GSA_NOT_AVAILABLE = 1;
+    public static final int STATUS_SYNC_NOT_INITIALIZED = 2;
+    public static final int STATUS_SYNC_NOT_SYNCING_URLS = 3;
+    public static final int STATUS_SYNC_NOT_KEYSTORE_PASSPHRASE = 4;
+    public static final int STATUS_SYNC_OTHER = 5;
+    public static final int STATUS_SVELTE_DEVICE = 6;
+    public static final int STATUS_NO_TAB = 7;
+    public static final int STATUS_INCOGNITO = 8;
+    public static final int STATUS_INVALID_SCHEME = 9;
+    public static final int STATUS_TAB_ID_MISMATCH = 10;
+    public static final int STATUS_DUP_TITLE_CHANGE = 11;
+    public static final int STATUS_CONNECTION_FAILED = 12;
+    public static final int STATUS_SYNC_NOT_READY_AT_REPORT_TIME = 13;
+    public static final int STATUS_NOT_SIGNED_IN = 14;
+    public static final int STATUS_GSA_ACCOUNT_MISSING = 15;
+    public static final int STATUS_GSA_ACCOUNT_MISMATCH = 16;
+    public static final int STATUS_RESULT_IS_NULL = 17;
+    public static final int STATUS_RESULT_FAILED = 18;
+    public static final int STATUS_SUCCESS_WITH_SELECTION = 19;
+    // This should always stay last and have the highest number.
+    private static final int STATUS_BOUNDARY = 20;
+
+    private final ChromeActivity mActivity;
+    private final GSAContextReportDelegate mDelegate;
+    private TabModelSelectorTabObserver mSelectorTabObserver;
+    private TabModelObserver mModelObserver;
+    private ContextualSearchObserver mContextualSearchObserver;
+    private boolean mLastContextWasTitleChange;
+    private final AtomicBoolean mContextInUse;
+
+    /**
+     * Creates a ContextReporter for an Activity.
+     * @param activity Chrome Activity which context will be reported.
+     * @param controller used to communicate with GSA
+     */
+    public ContextReporter(ChromeActivity activity, GSAContextReportDelegate controller) {
+        mActivity = activity;
+        mDelegate = controller;
+        mContextInUse = new AtomicBoolean(false);
+        Log.d(TAG, "Created a new ContextReporter");
+    }
+
+    /**
+     * Starts reporting context.
+     */
+    public void enable() {
+        Tab currentTab = mActivity.getActivityTab();
+        reportUsageOfCurrentContextIfPossible(currentTab, false, null);
+
+        TabModelSelector selector = mActivity.getTabModelSelector();
+        assert selector != null;
+
+        if (mSelectorTabObserver == null) {
+            mSelectorTabObserver = new TabModelSelectorTabObserver(selector) {
+                @Override
+                public void onTitleUpdated(Tab tab) {
+                    // Report usage declaring this as a title change.
+                    reportUsageOfCurrentContextIfPossible(tab, true, null);
+                }
+
+                @Override
+                public void onUrlUpdated(Tab tab) {
+                    reportUsageOfCurrentContextIfPossible(tab, false, null);
+                }
+            };
+        }
+        if (mModelObserver == null) {
+            assert !selector.getModels().isEmpty();
+            mModelObserver = new EmptyTabModelObserver() {
+                @Override
+                public void didSelectTab(Tab tab, TabSelectionType type, int lastId) {
+                    reportUsageOfCurrentContextIfPossible(tab, false, null);
+                }
+            };
+            for (TabModel model : selector.getModels()) {
+                model.addObserver(mModelObserver);
+            }
+        }
+        if (mContextualSearchObserver == null && mActivity.getContextualSearchManager() != null) {
+            mContextualSearchObserver = new ContextualSearchObserver() {
+                @Override
+                public void onShowContextualSearch(GSAContextDisplaySelection contextSelection) {
+                    if (contextSelection != null) reportDisplaySelection(contextSelection);
+                }
+
+                @Override
+                public void onHideContextualSearch() {
+                    reportDisplaySelection(null);
+                }
+            };
+            mActivity.getContextualSearchManager().addObserver(mContextualSearchObserver);
+        }
+    }
+
+    /**
+     * Stops reporting context. Called when the app goes to the background.
+     */
+    public void disable() {
+        reportUsageEndedIfNecessary();
+
+        if (mSelectorTabObserver != null) {
+            mSelectorTabObserver.destroy();
+            mSelectorTabObserver = null;
+        }
+        if (mModelObserver != null) {
+            for (TabModel model : mActivity.getTabModelSelector().getModels()) {
+                model.removeObserver(mModelObserver);
+            }
+            mModelObserver = null;
+        }
+        if (mContextualSearchObserver != null && mActivity.getContextualSearchManager() != null) {
+            mActivity.getContextualSearchManager().removeObserver(mContextualSearchObserver);
+            mContextualSearchObserver = null;
+        }
+    }
+
+    /**
+     * Reports that the given display selection has been established for the current tab.
+     * @param displaySelection The information about the selection being displayed.
+     */
+    private void reportDisplaySelection(@Nullable GSAContextDisplaySelection displaySelection) {
+        Tab currentTab = mActivity.getActivityTab();
+        reportUsageOfCurrentContextIfPossible(currentTab, false, displaySelection);
+    }
+
+    private void reportUsageEndedIfNecessary() {
+        if (mContextInUse.compareAndSet(true, false)) mDelegate.reportContextUsageEnded();
+    }
+
+    private void reportUsageOfCurrentContextIfPossible(
+            Tab tab, boolean isTitleChange, @Nullable GSAContextDisplaySelection displaySelection) {
+        Tab currentTab = mActivity.getActivityTab();
+        if (currentTab == null || currentTab.isIncognito()) {
+            if (currentTab == null) {
+                reportStatus(STATUS_NO_TAB);
+                Log.d(TAG, "Not reporting, tab is null");
+            } else {
+                reportStatus(STATUS_INCOGNITO);
+                Log.d(TAG, "Not reporting, tab is incognito");
+            }
+            reportUsageEndedIfNecessary();
+            return;
+        }
+
+        String currentUrl = currentTab.getUrl();
+        if (TextUtils.isEmpty(currentUrl) || !(currentUrl.startsWith(UrlConstants.HTTP_SCHEME)
+                || currentUrl.startsWith(UrlConstants.HTTPS_SCHEME))) {
+            reportStatus(STATUS_INVALID_SCHEME);
+            Log.d(TAG, "Not reporting, URL scheme is invalid");
+            reportUsageEndedIfNecessary();
+            return;
+        }
+
+        // Check whether this is a context change we would like to report.
+        if (currentTab.getId() != tab.getId()) {
+            reportStatus(STATUS_TAB_ID_MISMATCH);
+            Log.d(TAG, "Not reporting, tab ID doesn't match");
+            return;
+        }
+        if (isTitleChange && mLastContextWasTitleChange) {
+            reportStatus(STATUS_DUP_TITLE_CHANGE);
+            Log.d(TAG, "Not reporting, repeated title update");
+            return;
+        }
+
+        reportUsageEndedIfNecessary();
+
+        mDelegate.reportContext(currentTab.getUrl(), currentTab.getTitle(), displaySelection);
+        mLastContextWasTitleChange = isTitleChange;
+        mContextInUse.set(true);
+    }
+
+    /**
+     * Records the given status via UMA.
+     * Use one of the STATUS_* constants above.
+     */
+    public static void reportStatus(int status) {
+        RecordHistogram.recordEnumeratedHistogram(
+                "Search.IcingContextReportingStatus", status, STATUS_BOUNDARY);
+    }
+
+    /**
+     * Records an appropriate status via UMA given the current sync status.
+     */
+    public static void reportSyncStatus(ProfileSyncService syncService) {
+        if (!syncService.isSyncInitialized()) {
+            reportStatus(STATUS_SYNC_NOT_INITIALIZED);
+        } else if (!syncService.getActiveDataTypes().contains(ModelType.TYPED_URL)) {
+            reportStatus(STATUS_SYNC_NOT_SYNCING_URLS);
+        } else if (!syncService.getPassphraseType().equals(PassphraseType.KEYSTORE_PASSPHRASE)) {
+            reportStatus(STATUS_SYNC_NOT_KEYSTORE_PASSPHRASE);
+        } else {
+            reportStatus(STATUS_SYNC_OTHER);
+        }
+    }
+}