Let embedder provide select action mode

android_webview/java/src/org/chromium/android_webview/AwActionModeCallback.java

Index: android_webview/java/src/org/chromium/android_webview/AwActionModeCallback.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwActionModeCallback.java b/android_webview/java/src/org/chromium/android_webview/AwActionModeCallback.java
new file mode 100644
index 0000000000000000000000000000000000000000..16f9a4889c10e0f7a322cdf9136b90b9887d2405
--- /dev/null
+++ b/android_webview/java/src/org/chromium/android_webview/AwActionModeCallback.java
@@ -0,0 +1,90 @@
+// 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.android_webview;
+
+import android.content.Intent;
+import android.os.Build;
+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.content.R;
+import org.chromium.content_public.browser.ActionModeCallbackHelper;
+
+/**
+ * A class that handles selection action mode for Android WebView.
+ */
+public class AwActionModeCallback implements ActionMode.Callback {
+    private final AwContents mAwContents;
+    private final ActionModeCallbackHelper mHelper;
+    private int mAllowedMenuItems;
+
+    public AwActionModeCallback(AwContents awContents, ActionModeCallbackHelper helper) {
+        mAwContents = awContents;
+        mHelper = helper;
+        mHelper.setAllowedMenuItems(0);  // No item is allowed by default for WebView.
+    }
+
+    @Override
+    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+        int allowedItems = (getAllowedMenu(ActionModeCallbackHelper.MENU_ITEM_SHARE)
+                | getAllowedMenu(ActionModeCallbackHelper.MENU_ITEM_WEB_SEARCH)
+                | getAllowedMenu(ActionModeCallbackHelper.MENU_ITEM_PROCESS_TEXT));
+        if (allowedItems != mAllowedMenuItems) {
+            mHelper.setAllowedMenuItems(allowedItems);
+            mAllowedMenuItems = allowedItems;
+        }
+        mHelper.onCreateActionMode(mode, menu);
+        return true;
+    }
+
+    private int getAllowedMenu(int menuItem) {
+        return mAwContents.isSelectActionModeAllowed(menuItem) ? menuItem : 0;
+    }
+
+    @Override
+    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        return mHelper.onPrepareActionMode(mode, menu);
+    }
+
+    @Override
+    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        if (!mHelper.isActionModeValid()) return true;
+
+        int groupId = item.getGroupId();
+
+        if (groupId == R.id.select_action_menu_text_processing_menus) {
+            processText(item.getIntent());
+            // The ActionMode is not dismissed to match the behavior with
+            // TextView in Android M.
+        } else {
+            return mHelper.onActionItemClicked(mode, item);
+        }
+        return true;
+    }
+
+    @Override
+    public void onDestroyActionMode(ActionMode mode) {
+        mHelper.onDestroyActionMode();
+    }
+
+    private void processText(Intent intent) {
+        RecordUserAction.record("MobileActionMode.ProcessTextIntent");
+        assert Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
+
+        String query = mHelper.sanitizeQuery(mHelper.getSelectedText(),
+                ActionModeCallbackHelper.MAX_SEARCH_QUERY_LENGTH);
+        if (TextUtils.isEmpty(query)) return;
+
+        intent.putExtra(Intent.EXTRA_PROCESS_TEXT, query);
+        try {
+            mAwContents.startProcessTextIntent(intent);
+        } catch (android.content.ActivityNotFoundException ex) {
+            // If no app handles it, do nothing.
+        }
+    }
+}