C++ SkDisplayable::getProperty方法代码示例

void SkApply::endSave(int index) {
    SkAnimateBase* animate = fActive->fAnimators[index];
    const SkMemberInfo* info = animate->fFieldInfo;
    SkDisplayTypes type = (SkDisplayTypes) info->fType;
    if (type == SkType_MemberFunction)
        return;
    SkDisplayable* target = getTarget(animate);
    size_t size = info->getSize(target);
    int count = (int) (size / sizeof(SkScalar));
    int activeIndex = fActive->fDrawIndex + index;
    SkOperand* last = new SkOperand[count];
    SkAutoTDelete<SkOperand> autoLast(last);
    if (type != SkType_MemberProperty) {
        info->getValue(target, last, count);
        SkOperand* saveOperand = fActive->fSaveRestore[activeIndex];
        if (saveOperand)
            info->setValue(target, fActive->fSaveRestore[activeIndex], count);
    } else {
        SkScriptValue scriptValue;
        bool success = target->getProperty(info->propertyIndex(), &scriptValue);
        SkASSERT(success = true);
        last[0] = scriptValue.fOperand;
        scriptValue.fOperand = fActive->fSaveRestore[activeIndex][0];
        target->setProperty(info->propertyIndex(), scriptValue);
    }
    SkOperand* save = fActive->fSaveRestore[activeIndex];
    if (save)
        memcpy(save, last, count * sizeof(SkOperand));
}

void SkApply::save(int index) {
    SkAnimateBase* animate = fActive->fAnimators[index];
    const SkMemberInfo * info = animate->fFieldInfo;
    SkDisplayable* target = getTarget(animate);
//  if (animate->hasExecute())
//      info = animate->getResolvedInfo();
    SkDisplayTypes type = (SkDisplayTypes) info->fType;
    if (type == SkType_MemberFunction)
        return; // nothing to save
    size_t size = info->getSize(target);
    int count = (int) (size / sizeof(SkScalar));
    bool useLast = true;
// !!! this all may be unneeded, at least in the dynamic case ??
    int activeIndex = fActive->fDrawIndex + index;
    SkTDOperandArray last;
    if (fActive->fSaveRestore[activeIndex] == NULL) {
        fActive->fSaveRestore[activeIndex] = new SkOperand[count];
        useLast = false;
    } else {
        last.setCount(count);
        memcpy(last.begin(), fActive->fSaveRestore[activeIndex], count * sizeof(SkOperand));
    }
    if (type != SkType_MemberProperty) {
        info->getValue(target, fActive->fSaveRestore[activeIndex], count);
        if (useLast)
            info->setValue(target, last.begin(), count);
    } else {
        SkScriptValue scriptValue;
        bool success = target->getProperty(info->propertyIndex(), &scriptValue);
        SkASSERT(success == true);
        SkASSERT(scriptValue.fType == SkType_Float);
        fActive->fSaveRestore[activeIndex][0] = scriptValue.fOperand;
        if (useLast) {
            SkScriptValue scriptValue;
            scriptValue.fType = type;
            scriptValue.fOperand = last[0];
            target->setProperty(info->propertyIndex(), scriptValue);
        }
    }
// !!!  end of unneeded
}

bool SkAnimatorScript::EvalMember(const char* member, size_t len, void* object, void* eng,
        SkScriptValue* value) {
    SkScriptEngine* engine = (SkScriptEngine*) eng;
    SkDisplayable* displayable = (SkDisplayable*) object;
    SkString name(member, len);
    SkDisplayable* named = displayable->contains(name);
    if (named) {
        value->fOperand.fDisplayable = named;
        value->fType = SkType_Displayable;
        return true;
    }
    const SkMemberInfo* info = displayable->getMember(name.c_str());
    if (info == NULL)
        return false;
    if (info->fType == SkType_MemberProperty) {
        if (displayable->getProperty(info->propertyIndex(), value) == false) {
            SkASSERT(0);
            return false;
        }
    }
    return EvalMemberCommon(engine, info, displayable, value);
}

void SkDisplayable::dumpAttrs(SkAnimateMaker* maker) {
    SkDisplayTypes type = getType();
    if (type == SkType_Unknown) {
        //SkDebugf("/>\n");
        return;
    }
    SkDisplayable* blankCopy = SkDisplayType::CreateInstance(maker, type);

    int index = -1;
    int propIndex = 0;
    const SkMemberInfo* info;
    const SkMemberInfo* blankInfo;
    SkScriptValue value;
    SkScriptValue blankValue;
    SkOperand values[2];
    SkOperand blankValues[2];
    do {
        info = this->getMember(++index);
        if (NULL == info) {
            //SkDebugf("\n");
            break;
        }
        if (SkType_MemberProperty == info->fType) {
            if (getProperty(propIndex, &value)) {
                blankCopy->getProperty(propIndex, &blankValue);
                //last two are dummies
                dumpValues(info, value.fType, value.fOperand, blankValue.fOperand, value.fOperand, blankValue.fOperand);
                }
            
            propIndex++;
            continue;
        }
        if (SkDisplayType::IsDisplayable(maker, info->fType)) {
            continue;
        }
        
        if (info->fType == SkType_MemberFunction)
            continue;
            
            
        if (info->fType == SkType_Array) {
            SkTDOperandArray* array = (SkTDOperandArray*) info->memberData(this);
            int arrayCount;
            if (array == NULL || (arrayCount = array->count()) == 0)
                continue;
            SkDisplayTypes elementType;
            if (type == SkType_Array) {
                SkDisplayArray* dispArray = (SkDisplayArray*) this;
                elementType = dispArray->values.getType();
            } else
                elementType = info->arrayType();
            bool firstElem = true;
            SkDebugf("%s=\"[", info->fName);
            for (SkOperand* op = array->begin(); op < array->end(); op++) {
                if (!firstElem) SkDebugf(",");
                switch (elementType) {
                        case SkType_Displayable:
                            SkDebugf("%s", op->fDisplayable->id);
                            break;
                        case SkType_Int:                            
                            SkDebugf("%d", op->fS32);
                            break;
                        case SkType_Float:
#ifdef SK_CAN_USE_FLOAT
                            SkDebugf("%g", SkScalarToFloat(op->fScalar));
#else
                            SkDebugf("%x", op->fScalar);
#endif
                            break;
                        case SkType_String:
                        case SkType_DynamicString:    
                            SkDebugf("%s", op->fString->c_str());
                            break;
                        default:
                            break;
                }
                firstElem = false;
            }
            SkDebugf("]\" ");
            continue;
        }
        
        if (info->fType == SkType_String || info->fType == SkType_DynamicString) {
            SkString* string;
            info->getString(this, &string);
            if (string->isEmpty() == false)
                SkDebugf("%s=\"%s\"\t", info->fName, string->c_str()); 
            continue;
        }
        
        
        blankInfo = blankCopy->getMember(index);
        int i = info->fCount;
        info->getValue(this, values, i);
        blankInfo->getValue(blankCopy, blankValues, i);
        dumpValues(info, info->fType, values[0], blankValues[0], values[1], blankValues[1]);
    } while (true);
    delete blankCopy;
}

JSBool SkJSDisplayable::GetProperty(JSContext *cx, JSObject *obj, jsval id,
                                 jsval *vp)
{
    if (JSVAL_IS_INT(id) == 0)
        return JS_TRUE; 
    SkJSDisplayable *p = (SkJSDisplayable *) JS_GetPrivate(cx, obj);
    SkDisplayable* displayable = p->fDisplayable;
    SkDisplayTypes displayableType = displayable->getType();
    int members;
    const SkMemberInfo* info = SkDisplayType::GetMembers(NULL /* fMaker */, displayableType, &members);
    int idIndex = JSVAL_TO_INT(id);
    SkASSERT(idIndex >= 0 && idIndex < members);
    info = &info[idIndex];
    SkDisplayTypes infoType = (SkDisplayTypes) info->fType;
    SkScalar scalar = 0;
    S32 s32 = 0;
    SkString* string= NULL;
    JSString *str;
    if (infoType == SkType_MemberProperty) {
        infoType = info->propertyType();
        switch (infoType) {
            case SkType_Scalar: {
                SkScriptValue scriptValue;
                bool success = displayable->getProperty(info->propertyIndex(), &scriptValue);
                SkASSERT(scriptValue.fType == SkType_Scalar);
                scalar = scriptValue.fOperand.fScalar;
                } break;
            default:
                SkASSERT(0); // !!! unimplemented
        }
    } else {
        SkASSERT(info->fCount == 1);
        switch (infoType) {
            case SkType_Boolean:
            case SkType_Color:
            case SkType_S32:
                s32 = *(S32*) info->memberData(displayable);
                break;
            case SkType_String:
                info->getString(displayable, &string);
                break;
            case SkType_Scalar:
                SkOperand operand;
                info->getValue(displayable, &operand, 1);
                scalar = operand.fScalar;
                break;
            default:
                SkASSERT(0); // !!! unimplemented
        }
    }
    switch (infoType) {
        case SkType_Boolean:
            *vp = BOOLEAN_TO_JSVAL(s32);
            break;
        case SkType_Color:
        case SkType_S32:
            *vp = INT_TO_JSVAL(s32);
            break;
        case SkType_Scalar:
            if (SkScalarFraction(scalar) == 0)
                *vp = INT_TO_JSVAL(SkScalarFloor(scalar));
            else
#ifdef SK_SCALAR_IS_FLOAT
            *vp = DOUBLE_TO_JSVAL(scalar);
#else
            *vp = DOUBLE_TO_JSVAL(scalar / 65536.0f );
#endif
            break;
        case SkType_String:
            str = JS_NewStringCopyN(cx, string->c_str(), string->size());
            *vp = STRING_TO_JSVAL(str);
            break;
        default:
            SkASSERT(0); // !!! unimplemented
    }
    return JS_TRUE;
}