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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #ifndef SkScriptCallBack_DEFINED
      9 #define SkScriptCallBack_DEFINED
     10 
     11 #include "SkOperand2.h"
     12 #include "SkTDArray_Experimental.h"
     13 
     14 class SkScriptCallBack {
     15 public:
     16     virtual ~SkScriptCallBack() { }
     17 
     18     enum Type {
     19         kBox,
     20         kFunction,
     21         kMember,
     22         kMemberFunction,
     23         kProperty,
     24         kUnbox
     25     };
     26 
     27     virtual bool getReference(const char* , size_t len, SkScriptValue2* result) {  return false; }
     28     virtual SkOperand2::OpType getReturnType(size_t ref, SkOperand2*) {
     29         return SkOperand2::kS32; }
     30     virtual Type getType() const = 0;
     31 };
     32 
     33 class SkScriptCallBackConvert : public SkScriptCallBack {
     34 public:
     35     virtual bool convert(SkOperand2::OpType type, SkOperand2* operand) = 0;
     36 };
     37 
     38 class SkScriptCallBackFunction : public SkScriptCallBack {
     39 public:
     40     virtual void getParamTypes(SkIntArray(SkOperand2::OpType)* types) = 0;
     41     virtual Type getType() const { return kFunction; }
     42     virtual bool invoke(size_t ref, SkOpArray* params, SkOperand2* value) = 0;
     43 };
     44 
     45 class SkScriptCallBackMember: public SkScriptCallBack {
     46 public:
     47     bool getMemberReference(const char* , size_t len, void* object, SkScriptValue2* ref);
     48     virtual Type getType() const { return kMember; }
     49     virtual bool invoke(size_t ref, void* object, SkOperand2* value) = 0;
     50 };
     51 
     52 class SkScriptCallBackMemberFunction : public SkScriptCallBack {
     53 public:
     54     bool getMemberReference(const char* , size_t len, void* object, SkScriptValue2* ref);
     55     virtual void getParamTypes(SkIntArray(SkOperand2::OpType)* types) = 0;
     56     virtual Type getType() const { return kMemberFunction; }
     57     virtual bool invoke(size_t ref, void* object, SkOpArray* params, SkOperand2* value) = 0;
     58 };
     59 
     60 class SkScriptCallBackProperty : public SkScriptCallBack {
     61 public:
     62     virtual bool getConstValue(const char* name, size_t len, SkOperand2* value) { return false; }
     63     virtual bool getResult(size_t ref, SkOperand2* answer) { return false; }
     64     virtual Type getType() const { return kProperty; }
     65 };
     66 
     67 #endif // SkScriptCallBack_DEFINED
     68