| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "FunctionNormalizeSpace.hpp" |
| |
| |
| |
| #include "xalanc/XalanDOM/XalanDOMString.hpp" |
| |
| |
| |
| #include <xalanc/PlatformSupport/XalanMessageLoader.hpp> |
| |
| |
| |
| #include <xalanc/DOMSupport/DOMServices.hpp> |
| |
| |
| |
| #include "XObjectFactory.hpp" |
| |
| |
| |
| namespace XALAN_CPP_NAMESPACE { |
| |
| |
| |
| FunctionNormalizeSpace::FunctionNormalizeSpace() : |
| Function() |
| { |
| } |
| |
| |
| |
| FunctionNormalizeSpace::~FunctionNormalizeSpace() |
| { |
| } |
| |
| |
| |
| static const XalanDOMString s_emptyString(XalanMemMgrs::getDummyMemMgr()); |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::execute( |
| XPathExecutionContext& executionContext, |
| XalanNode* context, |
| const Locator* locator) const |
| { |
| if (context == 0) |
| { |
| const GetCachedString theGuard(executionContext); |
| |
| XalanDOMString& theResult = theGuard.get(); |
| |
| executionContext.problem( |
| XPathExecutionContext::eXPath, |
| XPathExecutionContext::eError, |
| XalanMessageLoader::getMessage( |
| theResult, |
| XalanMessages::FunctionRequiresNonNullContextNode_1Param, |
| "normalize-space()"), |
| locator, |
| context); |
| |
| // Dummy return value... |
| return XObjectPtr(0); |
| } |
| else |
| { |
| // The XPath standard says that if there are no arguments, |
| // the default is to turn the context node into a string value. |
| // DOMServices::getNodeData() will give us the data. |
| |
| // Get a cached string... |
| const GetCachedString theData(executionContext); |
| |
| XalanDOMString& theString = theData.get(); |
| |
| DOMServices::getNodeData(*context, executionContext, theString); |
| |
| return normalize(executionContext, theString); |
| } |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::execute( |
| XPathExecutionContext& executionContext, |
| XalanNode* /* context */, |
| const XObjectPtr arg1, |
| const Locator* const /* locator */) const |
| { |
| assert(arg1.null() == false); |
| |
| return normalize(executionContext, arg1); |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::normalize( |
| XPathExecutionContext& executionContext, |
| const XalanDOMString& theString, |
| GetCachedString& theResult) const |
| { |
| const XalanDOMString::size_type theStringLength = |
| theString.length(); |
| |
| XalanDOMString& theNewString = theResult.get(); |
| assert(theNewString.length() == 0); |
| |
| // The result string can only be as large as the source string, so |
| // just reserve the space now. |
| theNewString.reserve(theStringLength); |
| |
| enum eLastCharState { eNonSpace, eSpace, eSpaceAppended }; |
| |
| eLastCharState theState = eSpace; |
| |
| // OK, strip out any multiple spaces... |
| for (XalanDOMString::const_iterator i = theString.begin(); |
| i != theString.end(); ++i) |
| { |
| const XalanDOMChar theCurrentChar = *i; |
| |
| if (isXMLWhitespace(theCurrentChar) == false) |
| { |
| theNewString.push_back(theCurrentChar); |
| |
| theState = eNonSpace; |
| } |
| else if (theState == eNonSpace) |
| { |
| theNewString.push_back(XalanDOMChar(XalanUnicode::charSpace)); |
| |
| theState = eSpaceAppended; |
| } |
| } |
| |
| if (theNewString.empty() == true) |
| { |
| return executionContext.getXObjectFactory().createStringReference(s_emptyString); |
| } |
| else |
| { |
| // We may have a space character at end, since we don't look ahead, |
| // so removed it now... |
| if (theState == eSpaceAppended) |
| { |
| theNewString.erase(theNewString.end() - 1); |
| } |
| |
| return executionContext.getXObjectFactory().createString(theResult); |
| } |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::normalize( |
| XPathExecutionContext& executionContext, |
| const XObjectPtr& theArg) const |
| { |
| const XalanDOMString& theString = theArg->str(executionContext); |
| |
| if (needsNormalization(theString) == false) |
| { |
| if (theArg->getType() == XObject::eTypeString) |
| { |
| return theArg; |
| } |
| else |
| { |
| return executionContext.getXObjectFactory().createStringAdapter(theArg, executionContext); |
| } |
| } |
| else |
| { |
| return normalize(executionContext, theString); |
| } |
| } |
| |
| |
| |
| #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) |
| Function* |
| #else |
| FunctionNormalizeSpace* |
| #endif |
| FunctionNormalizeSpace::clone(MemoryManager& theManager) const |
| { |
| return XalanCopyConstruct(theManager, *this); |
| } |
| |
| |
| |
| const XalanDOMString& |
| FunctionNormalizeSpace::getError(XalanDOMString& theResult) const |
| { |
| |
| return XalanMessageLoader::getMessage( |
| theResult, |
| XalanMessages::FunctionTakesZeroOrOneArg_1Param, |
| "normalize-space()"); |
| } |
| |
| |
| |
| bool |
| FunctionNormalizeSpace::needsNormalization(const XalanDOMString& theString) const |
| { |
| const XalanDOMString::size_type theStringLength = theString.length(); |
| |
| bool fNormalize = false; |
| |
| bool fPreviousIsSpace = false; |
| |
| // OK, search for multiple spaces, or whitespace that is not the |
| // space character... |
| for (XalanDOMString::size_type i = 0; i < theStringLength && fNormalize == false; ++i) |
| { |
| const XalanDOMChar theCurrentChar = theString[i]; |
| |
| if (isXMLWhitespace(theCurrentChar) == false) |
| { |
| fPreviousIsSpace = false; |
| } |
| else |
| { |
| if (i == 0 || |
| i == theStringLength - 1 || |
| theCurrentChar != XalanDOMChar(XalanUnicode::charSpace) || |
| fPreviousIsSpace == true) |
| { |
| fNormalize = true; |
| } |
| else |
| { |
| fPreviousIsSpace = true; |
| } |
| } |
| } |
| |
| return fNormalize; |
| } |
| |
| |
| |
| } |