Added OmniboxAndroid class to handle prerender related logic.

BUG=166665

Review URL: https://chromiumcodereview.appspot.com/21061005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@215507 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 74 insertions, 0 deletions

diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omnibox/OmniboxPrerender.java b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/OmniboxPrerender.java
new file mode 100644
index 0000000..a99e765
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omnibox/OmniboxPrerender.java
@@ -0,0 +1,74 @@
+// Copyright 2013 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.omnibox;
+
+import org.chromium.chrome.browser.profiles.Profile;
+
+/**
+ * Java bridge to handle conditional prerendering using autocomplete results * as the user types
+ * into the Omnibox.
+ *
+ * OmniboxPrerender takes keystrokes, autocomplete results and navigation actions then feeds
+ * them to the (native) AutocompleteActionPredictor. The predictor uses this data to update its
+ * database and returns predictions on what page, if any, to pre-render or pre-connect.
+ *
+ */
+public class OmniboxPrerender {
+    private int mNativeOmniboxPrerender = 0;
+
+    /**
+     * Constructor for creating a OmniboxPrerender instanace.
+     */
+    public OmniboxPrerender() {
+        mNativeOmniboxPrerender = nativeInit();
+    }
+
+    /**
+     * Clears the transitional matches. This should be called when the user stops typing into
+     * the omnibox (e.g. when navigating away, closing the keyboard or changing tabs)
+     *
+     * @param profile profile instance corresponding to the active profile.
+     */
+    public void clear(Profile profile) {
+        nativeClear(mNativeOmniboxPrerender, profile);
+    }
+
+    /**
+     * Initializes the underlying action predictor for a given profile instance. This should be
+     * called as soon as possible as the predictor must register for certain notifications to
+     * properly initialize before providing predictions and updated its learning database.
+     *
+     * @param profile profile instance corresponding to active profile.
+     */
+    public void initializeForProfile(Profile profile) {
+        nativeInitializeForProfile(mNativeOmniboxPrerender, profile);
+    }
+
+    /**
+     * Potentailly invokes a pre-render or pre-connect given the url typed into the omnibox and
+     * a corresponding autocomplete result. This should be invoked everytime the omnibox changes
+     * (e.g. As the user types characters this method should be invoked at least once per character)
+     *
+     * @param url url in the omnibox.
+     * @param currentUrl url the current tab is displaying.
+     * @param nativeAutocompleteResult native pointer to an autocomplete result.
+     * @param profile profile instance corresponding to the active profile.
+     * @param nativeWebContents native pointer to a web contents instance.
+     */
+    public void prerenderMaybe(String url, String currentUrl, int nativeAutocompleteResult,
+            Profile profile, int nativeWebContents) {
+        nativePrerenderMaybe(mNativeOmniboxPrerender, url, currentUrl, nativeAutocompleteResult,
+                profile, nativeWebContents);
+    }
+
+    private native int nativeInit();
+    private native void nativeClear(int nativeOmniboxPrerender, Profile profile);
+    private native void nativeInitializeForProfile(
+            int nativeOmniboxPrerender,
+            Profile profile);
+    private native void nativePrerenderMaybe(int nativeOmniboxPrerender, String url,
+            String currentUrl, int nativeAutocompleteResult, Profile profile,
+            int nativeWebContents);
+}