1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/animator/SkScript.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,266 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkScript_DEFINED
1.14 +#define SkScript_DEFINED
1.15 +
1.16 +#include "SkOperand.h"
1.17 +#include "SkIntArray.h"
1.18 +#include "SkTDict.h"
1.19 +#include "SkTDStack.h"
1.20 +
1.21 +class SkAnimateMaker;
1.22 +
1.23 +class SkScriptEngine {
1.24 +public:
1.25 + enum Error {
1.26 + kNoError,
1.27 + kArrayIndexOutOfBounds,
1.28 + kCouldNotFindReferencedID,
1.29 + kDotOperatorExpectsObject,
1.30 + kErrorInArrrayIndex,
1.31 + kErrorInFunctionParameters,
1.32 + kExpectedArray,
1.33 + kExpectedBooleanExpression,
1.34 + kExpectedFieldName,
1.35 + kExpectedHex,
1.36 + kExpectedIntForConditionOperator,
1.37 + kExpectedNumber,
1.38 + kExpectedNumberForArrayIndex,
1.39 + kExpectedOperator,
1.40 + kExpectedToken,
1.41 + kExpectedTokenBeforeDotOperator,
1.42 + kExpectedValue,
1.43 + kHandleMemberFailed,
1.44 + kHandleMemberFunctionFailed,
1.45 + kHandleUnboxFailed,
1.46 + kIndexOutOfRange,
1.47 + kMismatchedArrayBrace,
1.48 + kMismatchedBrackets,
1.49 + kNoFunctionHandlerFound,
1.50 + kPrematureEnd,
1.51 + kTooManyParameters,
1.52 + kTypeConversionFailed,
1.53 + kUnterminatedString
1.54 + };
1.55 +
1.56 + enum SkOpType {
1.57 + kNoType,
1.58 + kInt = 1,
1.59 + kScalar = 2,
1.60 + kString = 4,
1.61 + kArray = 8,
1.62 + kObject = 16
1.63 +// kStruct = 32
1.64 + };
1.65 +
1.66 + typedef bool (*_boxCallBack)(void* userStorage, SkScriptValue* result);
1.67 + typedef bool (*_functionCallBack)(const char* func, size_t len, SkTDArray<SkScriptValue>& params,
1.68 + void* userStorage, SkScriptValue* result);
1.69 + typedef bool (*_memberCallBack)(const char* member, size_t len, void* object,
1.70 + void* userStorage, SkScriptValue* result);
1.71 + typedef bool (*_memberFunctionCallBack)(const char* member, size_t len, void* object,
1.72 + SkTDArray<SkScriptValue>& params, void* userStorage, SkScriptValue* result);
1.73 +// typedef bool (*_objectToStringCallBack)(void* object, void* userStorage, SkScriptValue* result);
1.74 + typedef bool (*_propertyCallBack)(const char* prop, size_t len, void* userStorage, SkScriptValue* result);
1.75 + typedef bool (*_unboxCallBack)(void* userStorage, SkScriptValue* result);
1.76 + SkScriptEngine(SkOpType returnType);
1.77 + ~SkScriptEngine();
1.78 + void boxCallBack(_boxCallBack func, void* userStorage);
1.79 + bool convertTo(SkDisplayTypes , SkScriptValue* );
1.80 + bool evaluateScript(const char** script, SkScriptValue* value);
1.81 + void forget(SkTypedArray* array);
1.82 + void functionCallBack(_functionCallBack func, void* userStorage);
1.83 + Error getError() const { return fError; }
1.84 +#ifdef SK_DEBUG
1.85 + bool getErrorString(SkString* err) const;
1.86 +#endif
1.87 + void memberCallBack(_memberCallBack , void* userStorage);
1.88 + void memberFunctionCallBack(_memberFunctionCallBack , void* userStorage);
1.89 +// void objectToStringCallBack(_objectToStringCallBack , void* userStorage);
1.90 + void propertyCallBack(_propertyCallBack prop, void* userStorage);
1.91 + void track(SkTypedArray* array);
1.92 + void track(SkString* string);
1.93 + void unboxCallBack(_unboxCallBack func, void* userStorage);
1.94 + static bool ConvertTo(SkScriptEngine* , SkDisplayTypes toType, SkScriptValue* value);
1.95 + static SkScalar IntToScalar(int32_t );
1.96 + static SkDisplayTypes ToDisplayType(SkOpType type);
1.97 + static SkOpType ToOpType(SkDisplayTypes type);
1.98 + static bool ValueToString(SkScriptValue value, SkString* string);
1.99 +
1.100 + enum CallBackType {
1.101 + kBox,
1.102 + kFunction,
1.103 + kMember,
1.104 + kMemberFunction,
1.105 + // kObjectToString,
1.106 + kProperty,
1.107 + kUnbox
1.108 + };
1.109 +
1.110 + struct UserCallBack {
1.111 + CallBackType fCallBackType;
1.112 + void* fUserStorage;
1.113 + union {
1.114 + _boxCallBack fBoxCallBack;
1.115 + _functionCallBack fFunctionCallBack;
1.116 + _memberCallBack fMemberCallBack;
1.117 + _memberFunctionCallBack fMemberFunctionCallBack;
1.118 + // _objectToStringCallBack fObjectToStringCallBack;
1.119 + _propertyCallBack fPropertyCallBack;
1.120 + _unboxCallBack fUnboxCallBack;
1.121 + };
1.122 + };
1.123 +
1.124 + enum SkOp {
1.125 + kUnassigned,
1.126 + kAdd,
1.127 + kAddInt = kAdd,
1.128 + kAddScalar,
1.129 + kAddString, // string concat
1.130 + kArrayOp,
1.131 + kBitAnd,
1.132 + kBitNot,
1.133 + kBitOr,
1.134 + kDivide,
1.135 + kDivideInt = kDivide,
1.136 + kDivideScalar,
1.137 + kElse,
1.138 + kEqual,
1.139 + kEqualInt = kEqual,
1.140 + kEqualScalar,
1.141 + kEqualString,
1.142 + kFlipOps,
1.143 + kGreaterEqual,
1.144 + kGreaterEqualInt = kGreaterEqual,
1.145 + kGreaterEqualScalar,
1.146 + kGreaterEqualString,
1.147 + kIf,
1.148 + kLogicalAnd,
1.149 + kLogicalNot,
1.150 + kLogicalOr,
1.151 + kMinus,
1.152 + kMinusInt = kMinus,
1.153 + kMinusScalar,
1.154 + kModulo,
1.155 + kModuloInt = kModulo,
1.156 + kModuloScalar,
1.157 + kMultiply,
1.158 + kMultiplyInt = kMultiply,
1.159 + kMultiplyScalar,
1.160 + kParen,
1.161 + kShiftLeft,
1.162 + kShiftRight, // signed
1.163 + kSubtract,
1.164 + kSubtractInt = kSubtract,
1.165 + kSubtractScalar,
1.166 + kXor,
1.167 + kArtificialOp = 0x40
1.168 + };
1.169 +
1.170 + enum SkOpBias {
1.171 + kNoBias,
1.172 + kTowardsNumber = 0,
1.173 + kTowardsString
1.174 + };
1.175 +
1.176 +protected:
1.177 +
1.178 + struct SkOperatorAttributes {
1.179 + unsigned int fLeftType : 3; // SkOpType, but only lower values
1.180 + unsigned int fRightType : 3; // SkOpType, but only lower values
1.181 + SkOpBias fBias : 1;
1.182 + };
1.183 +
1.184 + struct SkSuppress { // !!! could be compressed to a long
1.185 + SkOp fOperator; // operand which enabled suppression
1.186 + int fOpStackDepth; // depth when suppression operator was found
1.187 + SkBool8 fSuppress; // set if suppression happens now, as opposed to later
1.188 + SkBool8 fElse; // set on the : half of ? :
1.189 + };
1.190 +
1.191 + static const SkOperatorAttributes gOpAttributes[];
1.192 + static const signed char gPrecedence[];
1.193 + int arithmeticOp(char ch, char nextChar, bool lastPush);
1.194 + void commonCallBack(CallBackType type, UserCallBack& callBack, void* userStorage);
1.195 + bool convertParams(SkTDArray<SkScriptValue>&, const SkFunctionParamType* ,
1.196 + int paramTypeCount);
1.197 + void convertToString(SkOperand& operand, SkDisplayTypes type) {
1.198 + SkScriptValue scriptValue;
1.199 + scriptValue.fOperand = operand;
1.200 + scriptValue.fType = type;
1.201 + convertTo(SkType_String, &scriptValue);
1.202 + operand = scriptValue.fOperand;
1.203 + }
1.204 + bool evaluateDot(const char*& script, bool suppressed);
1.205 + bool evaluateDotParam(const char*& script, bool suppressed, const char* field, size_t fieldLength);
1.206 + bool functionParams(const char** scriptPtr, SkTDArray<SkScriptValue>& params);
1.207 + bool handleArrayIndexer(const char** scriptPtr, bool suppressed);
1.208 + bool handleBox(SkScriptValue* value);
1.209 + bool handleFunction(const char** scriptPtr, bool suppressed);
1.210 + bool handleMember(const char* field, size_t len, void* object);
1.211 + bool handleMemberFunction(const char* field, size_t len, void* object, SkTDArray<SkScriptValue>& params);
1.212 +// bool handleObjectToString(void* object);
1.213 + bool handleProperty(bool suppressed);
1.214 + bool handleUnbox(SkScriptValue* scriptValue);
1.215 + bool innerScript(const char** scriptPtr, SkScriptValue* value);
1.216 + int logicalOp(char ch, char nextChar);
1.217 + Error opError();
1.218 + bool processOp();
1.219 + void setAnimateMaker(SkAnimateMaker* maker) { fMaker = maker; }
1.220 + bool setError(Error , const char* pos);
1.221 + enum SkBraceStyle {
1.222 + // kStructBrace,
1.223 + kArrayBrace,
1.224 + kFunctionBrace
1.225 + };
1.226 +
1.227 +#if 0
1.228 + SkIntArray(SkBraceStyle) fBraceStack; // curly, square, function paren
1.229 + SkIntArray(SkOp) fOpStack;
1.230 + SkIntArray(SkOpType) fTypeStack;
1.231 + SkTDOperandArray fOperandStack;
1.232 + SkTDArray<SkSuppress> fSuppressStack;
1.233 +#else
1.234 + SkTDStack<SkBraceStyle> fBraceStack; // curly, square, function paren
1.235 + SkTDStack<SkOp> fOpStack;
1.236 + SkTDStack<SkOpType> fTypeStack;
1.237 + SkTDStack<SkOperand> fOperandStack;
1.238 + SkTDStack<SkSuppress> fSuppressStack;
1.239 +#endif
1.240 + SkAnimateMaker* fMaker;
1.241 + SkTDTypedArrayArray fTrackArray;
1.242 + SkTDStringArray fTrackString;
1.243 + const char* fToken; // one-deep stack
1.244 + size_t fTokenLength;
1.245 + SkTDArray<UserCallBack> fUserCallBacks;
1.246 + SkOpType fReturnType;
1.247 + Error fError;
1.248 + int fErrorPosition;
1.249 +private:
1.250 + friend class SkTypedArray;
1.251 +#ifdef SK_SUPPORT_UNITTEST
1.252 +public:
1.253 + static void UnitTest();
1.254 +#endif
1.255 +};
1.256 +
1.257 +#ifdef SK_SUPPORT_UNITTEST
1.258 +
1.259 +struct SkScriptNAnswer {
1.260 + const char* fScript;
1.261 + SkDisplayTypes fType;
1.262 + int32_t fIntAnswer;
1.263 + SkScalar fScalarAnswer;
1.264 + const char* fStringAnswer;
1.265 +};
1.266 +
1.267 +#endif
1.268 +
1.269 +#endif // SkScript_DEFINED
