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      1 /*
      2  * Copyright (C) 2008 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 
     17 #ifndef _UI_KEY_CHARACTER_MAP_H
     18 #define _UI_KEY_CHARACTER_MAP_H
     19 
     20 #include <stdint.h>
     21 #include <utils/Vector.h>
     22 
     23 using namespace android;
     24 
     25 class KeyCharacterMap
     26 {
     27 public:
     28     ~KeyCharacterMap();
     29 
     30     // see the javadoc for android.text.method.KeyCharacterMap for what
     31     // these do
     32     unsigned short get(int keycode, int meta);
     33     unsigned short getNumber(int keycode);
     34     unsigned short getMatch(int keycode, const unsigned short* chars,
     35                             int charsize, uint32_t modifiers);
     36     unsigned short getDisplayLabel(int keycode);
     37     bool getKeyData(int keycode, unsigned short *displayLabel,
     38                     unsigned short *number, unsigned short* results);
     39     inline unsigned int getKeyboardType() { return m_type; }
     40     bool getEvents(uint16_t* chars, size_t len,
     41                    Vector<int32_t>* keys, Vector<uint32_t>* modifiers);
     42 
     43     static KeyCharacterMap* load(int id);
     44 
     45     enum {
     46         NUMERIC = 1,
     47         Q14 = 2,
     48         QWERTY = 3 // or AZERTY or whatever
     49     };
     50 
     51 #define META_MASK 3
     52 
     53 private:
     54     struct Key
     55     {
     56         int32_t keycode;
     57         uint16_t display_label;
     58         uint16_t number;
     59         uint16_t data[META_MASK + 1];
     60     };
     61 
     62     KeyCharacterMap();
     63     static KeyCharacterMap* try_file(const char* filename);
     64     Key* find_key(int keycode);
     65     bool find_char(uint16_t c, uint32_t* key, uint32_t* mods);
     66 
     67     unsigned int m_type;
     68     unsigned int m_keyCount;
     69     Key* m_keys;
     70 };
     71 
     72 #endif // _UI_KEY_CHARACTER_MAP_H
     73