1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.inputmethodservice;
18
19import com.android.internal.view.menu.MenuBuilder;
20import com.android.internal.view.menu.MenuPopupHelper;
21
22import android.content.Context;
23import android.util.AttributeSet;
24import android.view.ActionMode;
25import android.view.Menu;
26import android.view.MenuInflater;
27import android.view.MenuItem;
28import android.view.View;
29import android.view.accessibility.AccessibilityEvent;
30import android.widget.Button;
31import android.widget.LinearLayout;
32
33/**
34 * ExtractEditLayout provides an ActionMode presentation for the
35 * limited screen real estate in extract mode.
36 *
37 * @hide
38 */
39public class ExtractEditLayout extends LinearLayout {
40    ExtractActionMode mActionMode;
41    Button mExtractActionButton;
42    Button mEditButton;
43
44    public ExtractEditLayout(Context context) {
45        super(context);
46    }
47
48    public ExtractEditLayout(Context context, AttributeSet attrs) {
49        super(context, attrs);
50    }
51
52    @Override
53    public ActionMode startActionModeForChild(View sourceView, ActionMode.Callback cb) {
54        final ExtractActionMode mode = new ExtractActionMode(cb);
55        if (mode.dispatchOnCreate()) {
56            mode.invalidate();
57            mExtractActionButton.setVisibility(INVISIBLE);
58            mEditButton.setVisibility(VISIBLE);
59            mActionMode = mode;
60            sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
61            return mode;
62        }
63        return null;
64    }
65
66    /**
67     * @return true if an action mode is currently active.
68     */
69    public boolean isActionModeStarted() {
70        return mActionMode != null;
71    }
72
73    /**
74     * Finishes a possibly started action mode.
75     */
76    public void finishActionMode() {
77        if (mActionMode != null) {
78            mActionMode.finish();
79        }
80    }
81
82    @Override
83    public void onFinishInflate() {
84        super.onFinishInflate();
85        mExtractActionButton = (Button) findViewById(com.android.internal.R.id.inputExtractAction);
86        mEditButton = (Button) findViewById(com.android.internal.R.id.inputExtractEditButton);
87        mEditButton.setOnClickListener(new OnClickListener() {
88            public void onClick(View clicked) {
89                if (mActionMode != null) {
90                    new MenuPopupHelper(getContext(), mActionMode.mMenu, clicked).show();
91                }
92            }
93        });
94    }
95
96    private class ExtractActionMode extends ActionMode implements MenuBuilder.Callback {
97        private ActionMode.Callback mCallback;
98        MenuBuilder mMenu;
99
100        public ExtractActionMode(Callback cb) {
101            mMenu = new MenuBuilder(getContext());
102            mMenu.setCallback(this);
103            mCallback = cb;
104        }
105
106        @Override
107        public void setTitle(CharSequence title) {
108            // Title will not be shown.
109        }
110
111        @Override
112        public void setTitle(int resId) {
113            // Title will not be shown.
114        }
115
116        @Override
117        public void setSubtitle(CharSequence subtitle) {
118            // Subtitle will not be shown.
119        }
120
121        @Override
122        public void setSubtitle(int resId) {
123            // Subtitle will not be shown.
124        }
125
126        @Override
127        public boolean isTitleOptional() {
128            // Not only is it optional, it will *never* be shown.
129            return true;
130        }
131
132        @Override
133        public void setCustomView(View view) {
134            // Custom view is not supported here.
135        }
136
137        @Override
138        public void invalidate() {
139            mMenu.stopDispatchingItemsChanged();
140            try {
141                mCallback.onPrepareActionMode(this, mMenu);
142            } finally {
143                mMenu.startDispatchingItemsChanged();
144            }
145        }
146
147        public boolean dispatchOnCreate() {
148            mMenu.stopDispatchingItemsChanged();
149            try {
150                return mCallback.onCreateActionMode(this, mMenu);
151            } finally {
152                mMenu.startDispatchingItemsChanged();
153            }
154        }
155
156        @Override
157        public void finish() {
158            if (mActionMode != this) {
159                // Not the active action mode - no-op
160                return;
161            }
162
163            mCallback.onDestroyActionMode(this);
164            mCallback = null;
165
166            mExtractActionButton.setVisibility(VISIBLE);
167            mEditButton.setVisibility(INVISIBLE);
168
169            sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
170
171            mActionMode = null;
172        }
173
174        @Override
175        public Menu getMenu() {
176            return mMenu;
177        }
178
179        @Override
180        public CharSequence getTitle() {
181            return null;
182        }
183
184        @Override
185        public CharSequence getSubtitle() {
186            return null;
187        }
188
189        @Override
190        public View getCustomView() {
191            return null;
192        }
193
194        @Override
195        public MenuInflater getMenuInflater() {
196            return new MenuInflater(getContext());
197        }
198
199        @Override
200        public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) {
201            if (mCallback != null) {
202                return mCallback.onActionItemClicked(this, item);
203            }
204            return false;
205        }
206
207        @Override
208        public void onMenuModeChange(MenuBuilder menu) {
209        }
210
211    }
212}
213