| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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/PlatformSupport/XalanMessageLoader.hpp> |
| |
| |
| |
| #include <xalanc/DOMSupport/DOMServices.hpp> |
| |
| |
| |
| #include "XObjectFactory.hpp" |
| |
| |
| |
| XALAN_CPP_NAMESPACE_BEGIN |
| |
| |
| |
| FunctionNormalizeSpace::FunctionNormalizeSpace() |
| { |
| } |
| |
| |
| |
| FunctionNormalizeSpace::~FunctionNormalizeSpace() |
| { |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::execute( |
| XPathExecutionContext& executionContext, |
| XalanNode* context, |
| const LocatorType* locator) const |
| { |
| if (context == 0) |
| { |
| executionContext.error( |
| XalanMessageLoader::getMessage(XalanMessages::FunctionRequiresNonNullContextNode_1Param, "normalize-space()"), |
| context, |
| locator); |
| |
| // 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... |
| XPathExecutionContext::GetAndReleaseCachedString theData(executionContext); |
| |
| XalanDOMString& theString = theData.get(); |
| |
| DOMServices::getNodeData(*context, theString); |
| |
| return normalize(executionContext, theString); |
| } |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::execute( |
| XPathExecutionContext& executionContext, |
| XalanNode* /* context */, |
| const XObjectPtr arg1, |
| const LocatorType* /* locator */) const |
| { |
| assert(arg1.null() == false); |
| |
| return normalize(executionContext, arg1); |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::normalize( |
| XPathExecutionContext& executionContext, |
| const XalanDOMString& theString) const |
| { |
| const XalanDOMString::size_type theStringLength = length(theString); |
| |
| // A string contain the result... |
| XPathExecutionContext::GetAndReleaseCachedString theResult(executionContext); |
| |
| XalanDOMString& theNewString = theResult.get(); |
| assert(length(theNewString) == 0); |
| |
| // The result string can only be as large as the source string, so |
| // just reserve the space now. |
| reserve(theNewString, theStringLength); |
| |
| bool fPreviousIsSpace = false; |
| |
| // OK, strip out any multiple spaces... |
| for (unsigned int i = 0; i < theStringLength; i++) |
| { |
| const XalanDOMChar theCurrentChar = charAt(theString, i); |
| |
| if (isXMLWhitespace(theCurrentChar) == true) |
| { |
| // If the previous character wasn't a space, and we've |
| // encountered some non-space characters, and it's not |
| // the last character in the string, then push the |
| // space character (not the original character). |
| if (fPreviousIsSpace == false) |
| { |
| if (length(theNewString) > 0 && |
| i < theStringLength - 1) |
| { |
| append(theNewString, XalanDOMChar(XalanUnicode::charSpace)); |
| } |
| |
| fPreviousIsSpace = true; |
| } |
| } |
| else |
| { |
| append(theNewString, theCurrentChar); |
| |
| fPreviousIsSpace = false; |
| } |
| } |
| |
| const XalanDOMString::size_type theNewStringLength = length(theNewString); |
| |
| if (theNewStringLength == 0) |
| { |
| return executionContext.getXObjectFactory().createString(XalanDOMString()); |
| } |
| else |
| { |
| // We may have a space character at end, since we don't look ahead, |
| // so removed it now... |
| if (charAt(theNewString, theNewStringLength - 1) == |
| XalanDOMChar(XalanUnicode::charSpace)) |
| { |
| theNewString.erase(theNewStringLength - 1, 1); |
| } |
| |
| return executionContext.getXObjectFactory().createString(theResult); |
| } |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionNormalizeSpace::normalize( |
| XPathExecutionContext& executionContext, |
| const XObjectPtr& theArg) const |
| { |
| const XalanDOMString& theString = theArg->str(); |
| |
| if (needsNormalization(theString) == false) |
| { |
| if (theArg->getType() == XObject::eTypeString) |
| { |
| return theArg; |
| } |
| else |
| { |
| return executionContext.getXObjectFactory().createStringAdapter(theArg); |
| } |
| } |
| else |
| { |
| return normalize(executionContext, theString); |
| } |
| } |
| |
| |
| |
| #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) |
| Function* |
| #else |
| FunctionNormalizeSpace* |
| #endif |
| FunctionNormalizeSpace::clone() const |
| { |
| return new FunctionNormalizeSpace(*this); |
| } |
| |
| |
| |
| const XalanDOMString |
| FunctionNormalizeSpace::getError() const |
| { |
| |
| return XalanMessageLoader::getMessage(XalanMessages::FunctionTakesZeroOrOneArg_1Param, "normalize-space()"); |
| |
| } |
| |
| |
| |
| bool |
| FunctionNormalizeSpace::needsNormalization(const XalanDOMString& theString) const |
| { |
| const XalanDOMString::size_type theStringLength = length(theString); |
| |
| 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 = charAt(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; |
| } |
| |
| |
| |
| XALAN_CPP_NAMESPACE_END |