00001 /* 00002 * The Apache Software License, Version 1.1 00003 * 00004 * 00005 * Copyright (c) 1999 The Apache Software Foundation. All rights 00006 * reserved. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions 00010 * are met: 00011 * 00012 * 1. Redistributions of source code must retain the above copyright 00013 * notice, this list of conditions and the following disclaimer. 00014 * 00015 * 2. Redistributions in binary form must reproduce the above copyright 00016 * notice, this list of conditions and the following disclaimer in 00017 * the documentation and/or other materials provided with the 00018 * distribution. 00019 * 00020 * 3. The end-user documentation included with the redistribution, 00021 * if any, must include the following acknowledgment: 00022 * "This product includes software developed by the 00023 * Apache Software Foundation (http://www.apache.org/)." 00024 * Alternately, this acknowledgment may appear in the software itself, 00025 * if and wherever such third-party acknowledgments normally appear. 00026 * 00027 * 4. The names "Xalan" and "Apache Software Foundation" must 00028 * not be used to endorse or promote products derived from this 00029 * software without prior written permission. For written 00030 * permission, please contact apache@apache.org. 00031 * 00032 * 5. Products derived from this software may not be called "Apache", 00033 * nor may "Apache" appear in their name, without prior written 00034 * permission of the Apache Software Foundation. 00035 * 00036 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 00037 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00038 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00039 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 00040 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00041 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00042 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 00043 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00044 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00045 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 00046 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00047 * SUCH DAMAGE. 00048 * ==================================================================== 00049 * 00050 * This software consists of voluntary contributions made by many 00051 * individuals on behalf of the Apache Software Foundation and was 00052 * originally based on software copyright (c) 1999, International 00053 * Business Machines, Inc., http://www.ibm.com. For more 00054 * information on the Apache Software Foundation, please see 00055 * <http://www.apache.org/>. 00056 */ 00057 #if !defined(FUNCTIONNORMALIZE_HEADER_GUARD_1357924680) 00058 #define FUNCTIONNORMALIZE_HEADER_GUARD_1357924680 00059 00060 // Base header file. Must be first. 00061 #include <XPath/XPathDefinitions.hpp> 00062 00063 00064 00065 #include <PlatformSupport/DOMStringHelper.hpp> 00066 #include <PlatformSupport/XalanUnicode.hpp> 00067 00068 00069 00070 // Base class header file... 00071 #include <XPath/FunctionDefaultStringArgument.hpp> 00072 00073 00074 00075 #include <XPath/NodeRefListBase.hpp> 00076 #include <XPath/XObject.hpp> 00077 #include <XPath/XObjectFactory.hpp> 00078 #include <XPath/XPathExecutionContext.hpp> 00079 00080 00081 00085 // 00086 // These are all inline, even though 00087 // there are virtual functions, because we expect that they will only be 00088 // needed by the XPath class. 00089 class XALAN_XPATH_EXPORT FunctionNormalizeSpace : public FunctionDefaultStringArgument 00090 { 00091 public: 00092 00093 // These methods are inherited from FunctionDefaultStringArgument ... 00094 00095 virtual XObject* 00096 execute( 00097 XPathExecutionContext& executionContext, 00098 XalanNode* context, 00099 int /* opPos */, 00100 const XObjectArgVectorType& args) 00101 { 00102 XalanDOMString theSourceString; 00103 00104 if(args.size() > 2) 00105 { 00106 executionContext.error("The normalize-space() function takes zero arguments or one argument!", 00107 context); 00108 } 00109 else if (args.size() == 1) 00110 { 00111 theSourceString = args[0]->str(); 00112 } 00113 else if (context == 0) 00114 { 00115 executionContext.error("The normalize-space() function requires a non-null context node!", 00116 context); 00117 } 00118 else 00119 { 00120 theSourceString = getDefaultStringArgument(executionContext, 00121 *context); 00122 } 00123 00124 const unsigned int theSourceStringLength = length(theSourceString); 00125 00126 XalanDOMChar thePreviousChar = 0; 00127 00128 // A vector to contain the new characters. We'll use it to construct 00129 // the result string. 00130 #if !defined(XALAN_NO_NAMESPACES) 00131 using std::vector; 00132 #endif 00133 00134 vector<XalanDOMChar> theVector; 00135 00136 // The result string can only be as large as the source string, so 00137 // just reserve the space now. Also reserve a space for the 00138 // terminating 0. 00139 theVector.reserve(theSourceStringLength + 1); 00140 00141 // OK, strip out any multiple spaces... 00142 for (unsigned int i = 0; i < theSourceStringLength; i++) 00143 { 00144 const XalanDOMChar theCurrentChar = charAt(theSourceString, i); 00145 00146 if (isSpace(theCurrentChar) == true) 00147 { 00148 // If the previous character wasn't a space, and we've 00149 // encountered some non-space characters, then push the 00150 // space. 00151 if (isSpace(thePreviousChar) == false && theVector.size() > 0) 00152 { 00153 theVector.push_back(XalanDOMChar(XalanUnicode::charSpace)); 00154 } 00155 } 00156 else 00157 { 00158 theVector.push_back(theCurrentChar); 00159 } 00160 00161 thePreviousChar = theCurrentChar; 00162 } 00163 00164 if (theVector.empty() == false && isSpace(theVector.back()) == true) 00165 { 00166 // The last character is a space, so remove it 00167 theVector.pop_back(); 00168 } 00169 00170 return executionContext.getXObjectFactory().createString(XalanDOMString(theVector.begin(), theVector.size())); 00171 } 00172 00173 #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) 00174 virtual Function* 00175 #else 00176 virtual FunctionNormalizeSpace* 00177 #endif 00178 clone() const 00179 { 00180 return new FunctionNormalizeSpace(*this); 00181 } 00182 00183 private: 00184 00185 // Not implemented... 00186 FunctionNormalizeSpace& 00187 operator=(const FunctionNormalizeSpace&); 00188 00189 bool 00190 operator==(const FunctionNormalizeSpace&) const; 00191 }; 00192 00193 00194 00195 #endif // FUNCTIONNORMALIZE_HEADER_GUARD_1357924680
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