v7/appcompat/src/android/support/v7/app/AppCompatDelegateImplV14.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

package android.support.v7.app;

import android.content.Context;
import android.support.v7.view.SupportActionModeWrapper;
import android.view.ActionMode;
import android.view.Window;

class AppCompatDelegateImplV14 extends AppCompatDelegateImplV11 {

    private boolean mHandleNativeActionModes = true; // defaults to true

    AppCompatDelegateImplV14(Context context, Window window, AppCompatCallback callback) {
        super(context, window, callback);
    }

    @Override
    Window.Callback wrapWindowCallback(Window.Callback callback) {
        // Override the window callback so that we can intercept onWindowStartingActionMode()
        // calls
        return new AppCompatWindowCallbackV14(callback);
    }

    @Override
    public void setHandleNativeActionModesEnabled(boolean enabled) {
        mHandleNativeActionModes = enabled;
    }

    @Override
    public boolean isHandleNativeActionModesEnabled() {
        return mHandleNativeActionModes;
    }

    class AppCompatWindowCallbackV14 extends AppCompatWindowCallbackBase {
        AppCompatWindowCallbackV14(Window.Callback callback) {
            super(callback);
        }

        @Override
        public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) {
            // We wrap in a support action mode on v14+ if enabled
            if (isHandleNativeActionModesEnabled()) {
                return startAsSupportActionMode(callback);
            }
            // Else, let the call fall through to the wrapped callback
            return super.onWindowStartingActionMode(callback);
        }

        /**
         * Wrap the framework {@link ActionMode.Callback} in a support action mode and
         * let AppCompat display it.
         */
        final ActionMode startAsSupportActionMode(ActionMode.Callback callback) {
            // Wrap the callback as a v7 ActionMode.Callback
            final SupportActionModeWrapper.CallbackWrapper callbackWrapper
                    = new SupportActionModeWrapper.CallbackWrapper(mContext, callback);

            // Try and start a support action mode using the wrapped callback
            final android.support.v7.view.ActionMode supportActionMode
                    = startSupportActionMode(callbackWrapper);

            if (supportActionMode != null) {
                // If we received a support action mode, wrap and return it
                return callbackWrapper.getActionModeWrapper(supportActionMode);
            }
            return null;
        }
    }
}