Let embedder provide select action mode

chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java
new file mode 100644
index 0000000000000000000000000000000000000000..e4d4f18655b65b13caa7e71433950ceffb7ca67c
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActionModeCallback.java
@@ -0,0 +1,109 @@
+// Copyright 2016 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;
+
+import android.content.Context;
+import android.text.TextUtils;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import org.chromium.base.metrics.RecordUserAction;
+import org.chromium.chrome.browser.omnibox.geo.GeolocationHeader;
+import org.chromium.chrome.browser.search_engines.TemplateUrlService;
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.tab.TabObserver;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.content.R;
+import org.chromium.content.browser.ActionModeCallbackHelper;
+import org.chromium.content.browser.WebActionMode;
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.ui.base.PageTransition;
+
+/**
+ * A class that handles selection action mode for an associated {@link Tab}.
+ */
+public class ChromeActionModeCallback implements ActionMode.Callback {
+    private final Context mContext;
+    private final Tab mTab;
+    private ActionModeCallbackHelper mHelper;
+
+    public ChromeActionModeCallback(Context context, Tab tab) {
+        mContext = context;
+        mTab = tab;
+    }
+
+    private ActionModeCallbackHelper getHelper() {
+        if (mHelper == null) mHelper = mTab.getContentViewCore().getActionModeCallbackHelper();
+        return mHelper;
+    }
+
+    @Override
+    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+        updateContextualActionBar(true);
+        return getHelper().onCreateActionMode(mode, menu);
+    }
+
+    @Override
+    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        updateContextualActionBar(true);
+        return getHelper().onPrepareActionMode(mode, menu);
+    }
+
+    @Override
+    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        if (!getHelper().isActionModeValid()) return true;
+
+        int id = item.getItemId();
+        int groupId = item.getGroupId();
+
+        if (id == R.id.select_action_menu_web_search) {
+            search();
+            getHelper().finishActionMode();
+        } else {
+            return getHelper().onActionItemClicked(mode, item);
+        }
+        return true;
+    }
+
+    @Override
+    public void onDestroyActionMode(ActionMode mode) {
+        getHelper().onDestroyActionMode();
+        updateContextualActionBar(false);
+    }
+
+    private void search() {
+        RecordUserAction.record("MobileActionMode.WebSearch");
+        if (mTab.getTabModelSelector() == null) return;
+
+        String query = WebActionMode.sanitizeQuery(getHelper().getSelectedText(),
+                WebActionMode.MAX_SEARCH_QUERY_LENGTH);
+        if (TextUtils.isEmpty(query)) return;
+
+        String url = TemplateUrlService.getInstance().getUrlForSearchQuery(query);
+        String headers = GeolocationHeader.getGeoHeader(mContext.getApplicationContext(),
+                url, getHelper().isIncognito());
+
+        LoadUrlParams loadUrlParams = new LoadUrlParams(url);
+        loadUrlParams.setVerbatimHeaders(headers);
+        loadUrlParams.setTransitionType(PageTransition.GENERATED);
+        mTab.getTabModelSelector().openNewTab(loadUrlParams,
+                TabLaunchType.FROM_LONGPRESS_FOREGROUND, mTab, getHelper().isIncognito());
+    }
+
+    /**
+     * Called when the contextual ActionBar is shown or hidden.
+     * @param show {@code true} when the ActionBar is shown; {@code false} otherwise.
+     */
+    private void updateContextualActionBar(final boolean show) {
+        if (WebActionMode.supportsFloatingActionMode()) return;
+        mTab.notifyObserver(new Tab.ObserverNotifier() {
+            @Override
+            public void run(TabObserver observer) {
+                observer.onContextualActionBarVisibilityChanged(mTab, show);
+            }
+        });
+    }
+}