1 /* 2 * Copyright (C) 2010 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 _LIBINPUT_VIRTUAL_KEY_MAP_H 18 #define _LIBINPUT_VIRTUAL_KEY_MAP_H 19 20 #include <stdint.h> 21 22 #include <input/Input.h> 23 #include <utils/Errors.h> 24 #include <utils/KeyedVector.h> 25 #include <utils/Tokenizer.h> 26 #include <utils/String8.h> 27 #include <utils/Unicode.h> 28 29 namespace android { 30 31 /* Describes a virtual key. */ 32 struct VirtualKeyDefinition { 33 int32_t scanCode; 34 35 // configured position data, specified in display coords 36 int32_t centerX; 37 int32_t centerY; 38 int32_t width; 39 int32_t height; 40 }; 41 42 43 /** 44 * Describes a collection of virtual keys on a touch screen in terms of 45 * virtual scan codes and hit rectangles. 46 * 47 * This object is immutable after it has been loaded. 48 */ 49 class VirtualKeyMap { 50 public: 51 ~VirtualKeyMap(); 52 53 static status_t load(const String8& filename, VirtualKeyMap** outMap); 54 getVirtualKeys()55 inline const Vector<VirtualKeyDefinition>& getVirtualKeys() const { 56 return mVirtualKeys; 57 } 58 59 private: 60 class Parser { 61 VirtualKeyMap* mMap; 62 Tokenizer* mTokenizer; 63 64 public: 65 Parser(VirtualKeyMap* map, Tokenizer* tokenizer); 66 ~Parser(); 67 status_t parse(); 68 69 private: 70 bool consumeFieldDelimiterAndSkipWhitespace(); 71 bool parseNextIntField(int32_t* outValue); 72 }; 73 74 Vector<VirtualKeyDefinition> mVirtualKeys; 75 76 VirtualKeyMap(); 77 }; 78 79 } // namespace android 80 81 #endif // _LIBINPUT_KEY_CHARACTER_MAP_H 82