[Contextual Search] Use Mojo API for Quick Answers.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java

 // 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.contextualsearch;
 
 import android.content.Context;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.ViewTreeObserver.OnGlobalFocusChangeListener;
 
+import org.chromium.base.Log;
 import org.chromium.base.SysUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayContentDelegate;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanel.PanelState;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanel.StateChangeReason;
 import org.chromium.chrome.browser.compositor.bottombar.OverlayPanelContentViewDelegate;
 import org.chromium.chrome.browser.compositor.bottombar.contextualsearch.ContextualSearchPanel;
@@ skipping 721 matching lines @@
     /**
      * @return Whether a Tap gesture is currently supported.
      */
     private boolean isTapSupported() {
         // Base page just started navigating away, so taps should be ignored.
         if (mDidBasePageLoadJustStart) return false;
 
         return mPolicy.isTapSupported();
     }
 
+    /**
+     * Called by the page through the CS JavaScript API to notify CS that there is
+     * a caption available on the current overlay.
+     * @param caption The caption to display.
+     * @param doesAnswer Whether the caption should be regarded as an answer such
+     *        that the user may not need to open the panel, or whether the caption
+     *        is simply informative or descriptive of the answer in the full results.
+     */
+    @CalledByNative
+    private void onSetCaption(String caption, boolean doesAnswer) {
+        // TODO(donnd): notify the UX of the caption and log doesAnswer.
+        Log.i(TAG, "ctxs setCaption: '" + caption + "', " + doesAnswer);
+    }
+
     // ============================================================================================
     // Translation support
     // TODO(donnd): move to a separate file.
     // ============================================================================================
 
     /**
      * Gets the list of readable languages for the current user, with the first
      * item in the list being the user's primary language (according to the Translate Service).
      * We assume that the user can read all languages that they can write.
      * @return The {@link List} of languages the user understands with their primary language first.
@@ skipping 228 matching lines @@
                     mSearchRequest.setNormalPriority();
                     loadSearchUrl();
                 }
                 mShouldLoadDelayedSearch = true;
                 mPolicy.updateCountersForOpen();
             }
         }
 
         @Override
         public void onContentViewCreated(ContentViewCore contentViewCore) {
+            // TODO(donnd): Consider moving to OverlayPanelContent.
+            if (mPolicy.isContextualSearchJsApiEnabled()) {
+                // Enable the Contextual Search JavaScript API between our service and the new view.
+                nativeAddViewForContextualSearchJsApi(
+                        mNativeContextualSearchManagerPtr, contentViewCore);
+            }
+
             // TODO(mdjones): Move SearchContentViewDelegate ownership to panel.
             mSearchContentViewDelegate.setOverlayPanelContentViewCore(contentViewCore);
         }
 
         @Override
         public void onContentViewDestroyed() {
             if (mSearchContentViewDelegate != null) {
                 mSearchContentViewDelegate.releaseOverlayPanelContentViewCore();
             }
         }
@@ skipping 330 matching lines @@
     // --------------------------------------------------------------------------------------------
 
     private native long nativeInit();
     private native void nativeDestroy(long nativeContextualSearchManager);
     private native void nativeStartSearchTermResolutionRequest(long nativeContextualSearchManager,
             String selection, boolean useResolvedSearchTerm, ContentViewCore baseContentViewCore,
             boolean maySendBasePageUrl);
     private native void nativeGatherSurroundingText(long nativeContextualSearchManager,
             String selection, boolean useResolvedSearchTerm, ContentViewCore baseContentViewCore,
             boolean maySendBasePageUrl);
+    private native void nativeAddViewForContextualSearchJsApi(
+            long nativeContextualSearchManager, ContentViewCore overlayContentViewCore);
     // Don't call these directly, instead call the private methods that cache the results.
     private native String nativeGetTargetLanguage(long nativeContextualSearchManager);
     private native String nativeGetAcceptLanguages(long nativeContextualSearchManager);
 }