mirror of https://github.com/axmolengine/axmol.git
275 lines
8.9 KiB
C++
275 lines
8.9 KiB
C++
/* libs/graphics/animator/SkScript.h
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**
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** Copyright 2006, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef SkScript_DEFINED
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#define SkScript_DEFINED
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#include "SkOperand.h"
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#include "SkIntArray.h"
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#include "SkTDict.h"
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#include "SkTDStack.h"
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class SkAnimateMaker;
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class SkScriptEngine {
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public:
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enum Error {
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kNoError,
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kArrayIndexOutOfBounds,
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kCouldNotFindReferencedID,
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kDotOperatorExpectsObject,
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kErrorInArrrayIndex,
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kErrorInFunctionParameters,
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kExpectedArray,
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kExpectedBooleanExpression,
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kExpectedFieldName,
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kExpectedHex,
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kExpectedIntForConditionOperator,
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kExpectedNumber,
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kExpectedNumberForArrayIndex,
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kExpectedOperator,
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kExpectedToken,
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kExpectedTokenBeforeDotOperator,
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kExpectedValue,
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kHandleMemberFailed,
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kHandleMemberFunctionFailed,
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kHandleUnboxFailed,
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kIndexOutOfRange,
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kMismatchedArrayBrace,
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kMismatchedBrackets,
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kNoFunctionHandlerFound,
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kPrematureEnd,
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kTooManyParameters,
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kTypeConversionFailed,
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kUnterminatedString
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};
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enum SkOpType {
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kNoType,
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kInt = 1,
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kScalar = 2,
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kString = 4,
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kArray = 8,
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kObject = 16
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// kStruct = 32
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};
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typedef bool (*_boxCallBack)(void* userStorage, SkScriptValue* result);
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typedef bool (*_functionCallBack)(const char* func, size_t len, SkTDArray<SkScriptValue>& params,
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void* userStorage, SkScriptValue* result);
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typedef bool (*_memberCallBack)(const char* member, size_t len, void* object,
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void* userStorage, SkScriptValue* result);
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typedef bool (*_memberFunctionCallBack)(const char* member, size_t len, void* object,
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SkTDArray<SkScriptValue>& params, void* userStorage, SkScriptValue* result);
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// typedef bool (*_objectToStringCallBack)(void* object, void* userStorage, SkScriptValue* result);
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typedef bool (*_propertyCallBack)(const char* prop, size_t len, void* userStorage, SkScriptValue* result);
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typedef bool (*_unboxCallBack)(void* userStorage, SkScriptValue* result);
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SkScriptEngine(SkOpType returnType);
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~SkScriptEngine();
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void boxCallBack(_boxCallBack func, void* userStorage);
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bool convertTo(SkDisplayTypes , SkScriptValue* );
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bool evaluateScript(const char** script, SkScriptValue* value);
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void forget(SkTypedArray* array);
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void functionCallBack(_functionCallBack func, void* userStorage);
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Error getError() const { return fError; }
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#ifdef SK_DEBUG
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bool getErrorString(SkString* err) const;
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#endif
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void memberCallBack(_memberCallBack , void* userStorage);
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void memberFunctionCallBack(_memberFunctionCallBack , void* userStorage);
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// void objectToStringCallBack(_objectToStringCallBack , void* userStorage);
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void propertyCallBack(_propertyCallBack prop, void* userStorage);
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void track(SkTypedArray* array);
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void track(SkString* string);
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void unboxCallBack(_unboxCallBack func, void* userStorage);
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static bool ConvertTo(SkScriptEngine* , SkDisplayTypes toType, SkScriptValue* value);
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static SkScalar IntToScalar(int32_t );
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static SkDisplayTypes ToDisplayType(SkOpType type);
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static SkOpType ToOpType(SkDisplayTypes type);
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static bool ValueToString(SkScriptValue value, SkString* string);
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enum CallBackType {
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kBox,
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kFunction,
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kMember,
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kMemberFunction,
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// kObjectToString,
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kProperty,
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kUnbox
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};
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struct UserCallBack {
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CallBackType fCallBackType;
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void* fUserStorage;
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union {
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_boxCallBack fBoxCallBack;
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_functionCallBack fFunctionCallBack;
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_memberCallBack fMemberCallBack;
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_memberFunctionCallBack fMemberFunctionCallBack;
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// _objectToStringCallBack fObjectToStringCallBack;
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_propertyCallBack fPropertyCallBack;
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_unboxCallBack fUnboxCallBack;
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};
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};
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enum SkOp {
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kUnassigned,
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kAdd,
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kAddInt = kAdd,
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kAddScalar,
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kAddString, // string concat
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kArrayOp,
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kBitAnd,
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kBitNot,
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kBitOr,
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kDivide,
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kDivideInt = kDivide,
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kDivideScalar,
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kElse,
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kEqual,
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kEqualInt = kEqual,
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kEqualScalar,
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kEqualString,
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kFlipOps,
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kGreaterEqual,
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kGreaterEqualInt = kGreaterEqual,
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kGreaterEqualScalar,
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kGreaterEqualString,
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kIf,
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kLogicalAnd,
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kLogicalNot,
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kLogicalOr,
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kMinus,
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kMinusInt = kMinus,
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kMinusScalar,
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kModulo,
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kModuloInt = kModulo,
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kModuloScalar,
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kMultiply,
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kMultiplyInt = kMultiply,
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kMultiplyScalar,
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kParen,
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kShiftLeft,
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kShiftRight, // signed
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kSubtract,
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kSubtractInt = kSubtract,
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kSubtractScalar,
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kXor,
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kArtificialOp = 0x40
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};
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enum SkOpBias {
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kNoBias,
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kTowardsNumber = 0,
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kTowardsString
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};
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protected:
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struct SkOperatorAttributes {
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unsigned int fLeftType : 3; // SkOpType, but only lower values
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unsigned int fRightType : 3; // SkOpType, but only lower values
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SkOpBias fBias : 1;
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};
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struct SkSuppress { // !!! could be compressed to a long
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SkOp fOperator; // operand which enabled suppression
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int fOpStackDepth; // depth when suppression operator was found
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SkBool8 fSuppress; // set if suppression happens now, as opposed to later
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SkBool8 fElse; // set on the : half of ? :
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};
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static const SkOperatorAttributes gOpAttributes[];
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static const signed char gPrecedence[];
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int arithmeticOp(char ch, char nextChar, bool lastPush);
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void commonCallBack(CallBackType type, UserCallBack& callBack, void* userStorage);
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bool convertParams(SkTDArray<SkScriptValue>&, const SkFunctionParamType* ,
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int paramTypeCount);
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void convertToString(SkOperand& operand, SkDisplayTypes type) {
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SkScriptValue scriptValue;
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scriptValue.fOperand = operand;
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scriptValue.fType = type;
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convertTo(SkType_String, &scriptValue);
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operand = scriptValue.fOperand;
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}
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bool evaluateDot(const char*& script, bool suppressed);
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bool evaluateDotParam(const char*& script, bool suppressed, const char* field, size_t fieldLength);
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bool functionParams(const char** scriptPtr, SkTDArray<SkScriptValue>& params);
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bool handleArrayIndexer(const char** scriptPtr, bool suppressed);
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bool handleBox(SkScriptValue* value);
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bool handleFunction(const char** scriptPtr, bool suppressed);
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bool handleMember(const char* field, size_t len, void* object);
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bool handleMemberFunction(const char* field, size_t len, void* object, SkTDArray<SkScriptValue>& params);
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// bool handleObjectToString(void* object);
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bool handleProperty(bool suppressed);
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bool handleUnbox(SkScriptValue* scriptValue);
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bool innerScript(const char** scriptPtr, SkScriptValue* value);
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int logicalOp(char ch, char nextChar);
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Error opError();
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bool processOp();
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void setAnimateMaker(SkAnimateMaker* maker) { fMaker = maker; }
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bool setError(Error , const char* pos);
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enum SkBraceStyle {
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// kStructBrace,
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kArrayBrace,
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kFunctionBrace
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};
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#if 0
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SkIntArray(SkBraceStyle) fBraceStack; // curly, square, function paren
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SkIntArray(SkOp) fOpStack;
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SkIntArray(SkOpType) fTypeStack;
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SkTDOperandArray fOperandStack;
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SkTDArray<SkSuppress> fSuppressStack;
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#else
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SkTDStack<SkBraceStyle> fBraceStack; // curly, square, function paren
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SkTDStack<SkOp> fOpStack;
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SkTDStack<SkOpType> fTypeStack;
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SkTDStack<SkOperand> fOperandStack;
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SkTDStack<SkSuppress> fSuppressStack;
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#endif
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SkAnimateMaker* fMaker;
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SkTDTypedArrayArray fTrackArray;
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SkTDStringArray fTrackString;
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const char* fToken; // one-deep stack
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size_t fTokenLength;
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SkTDArray<UserCallBack> fUserCallBacks;
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SkOpType fReturnType;
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Error fError;
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int fErrorPosition;
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private:
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friend class SkTypedArray;
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#ifdef SK_SUPPORT_UNITTEST
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public:
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static void UnitTest();
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#endif
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};
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#ifdef SK_SUPPORT_UNITTEST
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struct SkScriptNAnswer {
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const char* fScript;
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SkDisplayTypes fType;
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int32_t fIntAnswer;
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SkScalar fScalarAnswer;
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const char* fStringAnswer;
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};
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#endif
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#endif // SkScript_DEFINED
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